JP7132808B2 - Transducer and manufacturing method thereof - Google Patents

Description

The present invention relates to transducers and methods of manufacturing the same.

Patent Literature 1 discloses a configuration in which lead wires are connected by soldering or welding to free ends of wire mesh-shaped external electrodes in a multi-layer piezo actuator. In Patent Document 2, a lead wire is connected to the end of an external electrode in a laminated piezoelectric element with a conductive bonding material such as solder or conductive resin, and the connection portion between the end of the external electrode and the lead wire is made of resin. is disclosed.

Patent Document 3 discloses a piezoelectric element in which a porous sheet-shaped electrode is embedded in a polymer piezoelectric body. This piezoelectric element is manufactured by treating the surface of a polymer piezoelectric film or sheet with an organic solvent such as acetone, and then laminating and pressing a porous sheet-like electrode on the treated surface.

Japanese Patent Publication No. 2012-500486 Japanese Patent No. 5465337 Japanese Patent No. 3105645

However, it is not easy to connect a lead wire to the electrode in a state where the electrode is embedded as in Patent Document 3. SUMMARY OF THE INVENTION It is an object of the present invention to provide a transducer and a method of manufacturing the same that facilitate connection between electrodes and lead wires.

A transducer according to the present invention includes a dielectric layer, a first electrode sheet having a plurality of first through holes, and a first electrode sheet arranged on the first surface side of the dielectric layer, and a fusion material. arranged as at least a portion of the dielectric layer on the first surface side or joined to the first surface of the dielectric layer as a separate member, and the dielectric layer and the first electrode sheet are joined together by the fusion material; a first main sealing layer to be joined by fusion bonding, partially disposed between the first electrode sheet and the first main sealing layer, wherein the first main sealing layer is attached to the first electrode sheet; and a first fusion restricting layer that restricts fusion and allows at least part of the first electrode sheet to be disposed outside the first main fusion layer.

Due to the first fusion restricting layer, the first main fusion layer is not joined to a portion of the first electrode sheet, and a portion of the first electrode sheet is arranged outside the first main fusion layer. Therefore, it is easy and reliable to electrically connect the first lead wire and the like to the first electrode sheet.

Further, in the method of manufacturing a transducer according to the present invention, the dielectric layer, the material of the first main fusion layer, the first fusion regulation layer, and the first electrode sheet are laminated in this order. By forming a laminate and heating the laminate from the first outer surface side of the first electrode sheet, the material of the first main fusion layer is melted to form the first fusion restricting layer. The dielectric layer and the first electrode sheet are joined by the first main fusion layer in the region excluding the facing region, and the first electrode sheet is bonded to the first electrode sheet in the region facing the first fusion restricting layer. It is placed outside one main bonding layer. According to the manufacturing method, it is possible to reliably arrange a part of the first electrode sheet outside the first main adhesive layer. Therefore, it is easy and reliable to electrically connect the first lead wire and the like to the first electrode sheet.

FIG. 4 is a perspective view showing an electrostatic sheet that constitutes a transducer; FIG. 4 is a plan view of an electrostatic sheet that constitutes a transducer; 3 is a cross-sectional view taken along line III-III of FIG. 2; FIG. FIG. 3 is a cross-sectional view taken along line IV-IV of FIG. 2 in the electrostatic sheet of the first example, and is also a diagram showing the state of the connection protective layer disposing step in the electrostatic sheet manufacturing method. FIG. 3 is a cross-sectional view taken along line IV-IV of FIG. 2 in the electrostatic sheet of the second example, and is also a diagram showing the state of the connection protective layer disposing step in the electrostatic sheet manufacturing method. FIG. 3 is a sectional view taken along line VI-VI of FIG. 2; It is a figure which shows the state of the laminated body formation process in the manufacturing method of an electrostatic sheet. It is a figure which shows the state of the pressurization heating process in the manufacturing method of an electrostatic sheet. It is a figure which shows the state of the lead wire arrangement|positioning process in the manufacturing method of an electrostatic sheet. It is a figure which shows the state of the fixing layer formation process in the manufacturing method of an electrostatic sheet.

(1. Structure of Transducer 1)
The transducer 1 will be described with reference to FIGS. 1-6. Transducer 1 is of the electrostatic type. In other words, the transducer 1 can function as an actuator that generates vibration, sound, or the like by using the change in capacitance between the electrodes. In addition, the transducer 1 uses a change in capacitance between electrodes to include a sensor (external force detection sensor) that detects an external pushing force or the like, and a sensor that detects contact or approach of a conductor having a potential (contact sensor). proximity sensor).

When the transducer 1 functions as an actuator, the dielectric is deformed according to the potential between the electrodes by applying a voltage to the electrodes, and the deformation of the dielectric causes vibration. When the transducer 1 functions as an external force detection sensor, the capacitance between the electrodes changes due to the deformation of the dielectric due to the input of pushing force, vibration, sound, etc. from the outside. By detecting the voltage according to the electric capacity, the pressing force from the outside is detected. In addition, when the transducer 1 functions as a contact proximity sensor, the capacitance between the electrodes changes due to the contact or proximity of a conductor having a potential, and the voltage corresponding to the changed capacitance between the electrodes is detected. By doing so, the contact or approach of the conductor is detected.

As shown in FIG. 1, the transducer 1 has an electrostatic sheet formed in a sheet shape. However, the transducer 1 may be made by laminating a plurality of electrostatic sheets, which is the basic structure shown in FIG. The transducer 1 includes an electrostatic sheet composed of a sheet body portion 10 , a first connection portion 20 and a second connection portion 30 .

The sheet main body 10 constitutes a main part for functioning as the electrostatic transducer 1 . The seat main body 10 includes a transducer portion 10a that forms a range that functions as an actuator or a sensor, and terminal portions 10b that are connected to edges of the transducer portion 10a. The sheet main body 10 includes a dielectric layer 11, a first electrode sheet 12, a first main adhesive layer 13, a first main protective layer 14, a second electrode sheet 15, a second main adhesive layer 16, and a second main protective layer. A layer 17 is provided.

The first connection portion 20 includes a first lead wire 21 and constitutes a portion that connects the first lead wire 21 to the sheet body portion 10 . The first connecting portion 20 includes a first lead wire 21 , a first fusion restricting layer 22 , a first fixing layer 23 , a first connection protection layer 24 and a first connection fusion layer 25 . The second connection portion 30 includes a second lead wire 31 and constitutes a portion that connects the second lead wire 31 to the sheet body portion 10 . The second connecting portion 30 includes a second lead wire 31 , a second fusion restricting layer 32 , a second fixing layer 33 , a second connection protection layer 34 and a second connection fusion layer 35 .

It should be noted that the transducer 1 may be configured without the elements related to the second electrode sheet 15 . That is, the transducer 1 includes a second electrode sheet 15, a second main fusion layer 16, a second main protective layer 17, a second lead wire 31, a second fusion regulation layer 32, a second fixing layer 33, a second connection A configuration without the protective layer 34 may be employed. In this case, the electrostatic sheet that constitutes the transducer 1 is configured to include the dielectric layer 11 and elements related to the first electrode sheet 12 . That is, the transducer 1 includes the dielectric layer 11 , the first electrode sheet 12 , the first main fusion layer 13 , the first main protective layer 14 as the sheet body portion 10 , and the first connection portion 20 . The transducer 1 can also be configured to include a non-deformable conductive member (not shown) corresponding to the second electrode sheet 15 .

A configuration of the seat body portion 10 will be described. Dielectric layer 11 is made of an elastically deformable dielectric material. Specifically, the dielectric layer 11 is made of a thermoplastic material, particularly a thermoplastic elastomer. The dielectric layer 11 is sheet-like and formed into a desired outer shape. The dielectric layer 11 has a structure that expands and contracts in the thickness direction and also expands and contracts in the plane direction along with the expansion and contraction in the thickness direction.

The first electrode sheet 12 and the second electrode sheet 15 have conductivity, flexibility, and stretchability in the plane direction. The first electrode sheet 12 and the second electrode sheet 15 are, for example, conductive cloth. A conductive cloth is a woven or non-woven fabric made of conductive fibers. Here, the conductive fiber is formed by coating the surface of the flexible fiber with a conductive material. Conductive fibers are formed, for example, by plating the surface of resin fibers such as polyethylene with copper, nickel, or the like.

The first electrode sheet 12 has a plurality of first through-holes 12a (shown in FIG. 2), is flexible, and can be stretched in the surface direction by forming a cloth from fibers. The second electrode sheet 15, like the first electrode sheet 12, has a plurality of second through holes 15a (shown in FIG. 2).

In FIG. 2, the first electrode sheet 12 and the second electrode sheet 15 are conductive fabrics, but conductive non-woven fabrics can also be used. For example, as shown in FIG. 2, the first electrode sheet 12 is formed by weaving conductive fibers as warps and wefts in the case of a conductive fabric. A region surrounded by the warp and weft becomes the first through hole 12a. The same applies to the second through hole 15a.

In addition, when the first electrode sheet 12 is a conductive nonwoven fabric, the first through holes 12a are formed irregularly. In addition, the first electrode sheet 12 and the second electrode sheet 15 may be made of flexible and stretchable thin film punching metal instead of conductive cloth. In this case, the first through-hole 12a and the second through-hole 15a are punched portions. Alternatively, the first electrode sheet 12 may be an elastomer sheet (including a rubber sheet) containing a conductive material and having a plurality of through holes. In this example, the term "elastomer" means a polymeric material having elasticity, and is used in the sense of including a rubber elastic body and a rubber-like elastic body other than a rubber elastic body.

The first electrode sheet 12 and the second electrode sheet 15 are formed to have approximately the same size and have the same outer shape as the dielectric layer 11 . However, in the terminal portion 10b, the first electrode sheet 12 and the second electrode sheet 15 are allowed to have different shapes. The first electrode sheet 12 is arranged on the first surface (upper surface in FIG. 1) side of the dielectric layer 11 . The second electrode sheet 15 is arranged on the second surface (lower surface in FIG. 1) side of the dielectric layer 11 . Therefore, at least in the transducer section 10a, the first electrode sheet 12 and the second electrode sheet 15 are arranged to face each other with the dielectric layer 11 interposed therebetween.

Here, in the first electrode sheet 12, the surface facing the second electrode sheet 15 is defined as a first inner surface 12b, and the surface opposite to the second electrode sheet 15 is defined as a first outer surface 12c. In the second electrode sheet 15, the surface facing the first electrode sheet 12 is defined as a second inner surface 15b, and the surface opposite to the first electrode sheet 12 is defined as a second outer surface 15c.

As shown in FIG. 3, the first electrode sheet 12 is arranged on the first surface side of the dielectric layer 11 (upper side in FIG. 3). The first electrode sheet 12 and the dielectric layer 11 are joined by a first main fusion layer 13 made of a fusion material.

In FIG. 3, the first electrode sheet 12 is embedded on the first surface side of the material 11a of the dielectric layer 11 (shown in FIG. 7). That is, a portion of the dielectric layer 11 on the first surface side functions as the first main adhesive layer 13 that joins the body portion of the dielectric layer 11 and the first electrode sheet 12 . In other words, the first main adhesive layer 13 is arranged as at least a portion of the dielectric layer 11 on the first surface side, and joins the first electrode sheet 12 and the body portion of the dielectric layer 11 . In addition, the first main adhesive layer 13 may be joined to the first surface of the dielectric layer 11 as a separate member to join the first electrode sheet 12 and the dielectric layer 11 together.

Moreover, as described above, the first electrode sheet 12 is embedded on the first surface side of the material 11 a of the dielectric layer 11 . In other words, the first main adhesive layer 13 is the boundary portion between the body portion of the dielectric layer 11 and the first inner surface 12b of the first electrode sheet 12, and the boundary portion between the body portion of the dielectric layer 11 and the first electrode sheet 12. Boundary portions with the inner peripheral surfaces of the plurality of first through holes 12a are joined.

Furthermore, the first main protective layer 14 covers the first outer surface 12c of the first electrode sheet 12 while being bonded to the first outer surface 12c. A portion of the material 11 a of the dielectric layer 11 on the first surface side functions as the first main protective layer 14 . That is, the first main protective layer 14 is arranged as a portion of the first surface side of the material 11a of the dielectric layer 11, similarly to the first main bonding layer 13, and the first outer surface 12c is formed by fusion bonding of the bonding material. to cover. The first main protective layer 14 can also be arranged as a separate member on the first surface side of the dielectric layer 11 to cover the first outer surface 12c. The first outer surface 12c of the first electrode sheet 12 may be exposed to the outside.

As shown in FIG. 3, the second electrode sheet 15 is embedded on the second surface side (lower side in FIG. 3) of the material 11a of the dielectric layer 11, similarly to the first electrode sheet 12. As shown in FIG. That is, a portion of the dielectric layer 11 on the second surface side functions as the second main adhesive layer 16 that joins the body portion of the dielectric layer 11 and the second electrode sheet 15 . In other words, the second main fusing layer 16 is disposed as at least a portion of the dielectric layer 11 on the second surface side, and the second electrode sheet 15 and the body portion of the dielectric layer 11 are joined by fusing the fusing material. to join. The second main fusion layer 16 may be joined to the second surface of the dielectric layer 11 as a separate member, and the second electrode sheet 15 and the dielectric layer 11 may be joined by fusion bonding of the fusion material. .

Moreover, as described above, the second electrode sheet 15 is embedded on the second surface side of the material 11a of the dielectric layer 11 . That is, the second main adhesive layer 16 is formed between the body portion of the dielectric layer 11 and the second inner surface 15b of the second electrode sheet 15 and the boundary portion between the body portion of the dielectric layer 11 and the second electrode sheet 15. Boundary portions with the inner peripheral surfaces of the plurality of second through holes 15a are joined.

Furthermore, the second main protective layer 17 covers the second outer surface 15c of the second electrode sheet 15 while being bonded to the second outer surface 15c. A portion of the material 11 a of the dielectric layer 11 on the second surface side functions as the second main protective layer 17 . In other words, the second main protective layer 17 is arranged as a portion of the second surface side of the material 11a of the dielectric layer 11, similarly to the second main bonding layer 16, and the second outer surface 15c is formed by fusion bonding of the bonding material. to cover. The second main protective layer 17 can also be arranged as a separate member on the second surface side of the dielectric layer 11 to cover the second outer surface 15c. The second outer surface 15c of the second electrode sheet 15 may be exposed to the outside.

Here, in FIG. 3, the first main adhesive layer 13 and the second main adhesive layer 16 are formed by applying heat to the material of the dielectric layer 11 made of thermoplastic elastomer. Therefore, the first main bonding layer 13 and the second main bonding layer 16 are made of the same material component as the dielectric layer 11 . That is, the first main bonding layer 13 and the second main bonding layer 16 are formed without substantially changing the material components of the dielectric layer 11 . This means that the first main bonding layer 13 and the second main bonding layer 16 do not contain components such as volatile adhesives and organic solvents.

The configuration of the first connection portion 20 will be described with reference to FIGS. 4 and 5. FIG. The first lead wire 21 includes a first lead wire main body 21a covering the wire with an insulating material, and a first conductive portion 21b arranged on the distal end side and exposing the wire. A first lead wire body 21 a of the first lead wire 21 is arranged on the side of the first electrode sheet 12 opposite to the dielectric layer 11 (first outer surface 12 c ). The first conductive portion 21 b of the first lead wire 21 is arranged on the first surface side of the dielectric layer 11 . The first conductive portion 21b may be arranged on the side of the first outer surface 12c of the first electrode sheet 12, as shown in FIG. Further, the first conductive portion 21b may be arranged so as to be entangled with the first electrode sheet 12 as shown in FIG. In either case, the first conductive portion 21b is electrically connected to the first electrode sheet 12. As shown in FIG.

The first fusion restricting layer 22 is formed in a sheet shape and is made of a material capable of restricting passage of the fusion material forming the first main fusion layer 13 . The first fusion restricting layer 22 is made of a material having a softening point higher than that of the fusion material forming the first main fusion layer 13 . A material with no softening point is equivalent to a material with an infinite softening point. For example, the first fusion restricting layer 22 is made of a resin sheet, heat-resistant paper, or the like.

The first fusion restricting layer 22 is partially arranged between the first electrode sheet 12 and the first main fusion layer 13 . Specifically, the first fusion restricting layer 22 is arranged in a region where the first lead wire 21 is arranged. Therefore, the first fusion restricting layer 22 restricts fusion of the first main fusion layer 13 to the first electrode sheet 12 in the region where the first lead wire 21 is arranged. That is, the central portion of the first fusion restricting layer 22 is in a state where the first main fusion layer 13 does not exist. Therefore, the first fusion restricting layer 22 exposes at least a portion of the first electrode sheet 12 to the outside of the first main fusion layer 13 at the central portion.

Here, the central portion of the outer surface of the first fusion restricting layer 22 is not bonded to the first main fusion layer 13 and is arranged in a non-bonded state to the first electrode sheet 12 . On the other hand, the inner surface of the first fusion restricting layer 22 is joined to the first main fusion layer 13 . However, the outer edge portion of the outer surface of the first fusion restricting layer 22 is joined to the first main fusion layer 13 . That is, the outer edge of the first fusion restricting layer 22 is embedded in the first main fusion layer 13 . Therefore, the first fusion restricting layer 22 is positioned by the first main fusion layer 13 .

Therefore, the first main fusion layer 13 is not bonded to the first electrode sheet 12 in the region where the first fusion restricting layer 22 exists. Therefore, the first main fusion layer 13 exposes the first electrode sheet 12 to the outside in the region where the first fusion restricting layer 22 exists. On the other hand, the first main fusion layer 13 embeds a portion of the first electrode sheet 12 in a region where the first fusion restricting layer 22 does not exist, and does not expose the portion of the first electrode sheet 12 to the outside. are arranged as The first conductive portion 21 b of the first lead wire 21 is electrically connected to the portion of the first electrode sheet 12 exposed to the outside by the first fusion restricting layer 22 .

The first fixing layer 23 connects the first conductive portion 21b of the first lead wire 21 to the first electrode sheet 12 electrically in the region facing the first fusion restricting layer 22, and the first lead wire The first conductive portion 21 b of 21 is fixed to the first electrode sheet 12 . The first fixing layer 23 is, for example, a conductive bonding material such as solder or conductive resin. That is, the first fixing layer 23 establishes a state in which the first conductive portions 21b of the first lead wires 21 are electrically connected to the first electrode sheet 12 in a wide range and reliably.

The first connection protective layer 24 is formed in a sheet shape from a thermoplastic material, especially a thermoplastic elastomer. As shown in FIG. 2, the first connection protection layer 24 is formed in a shape corresponding to the area of the first lead wire 21 located on the first electrode sheet 12 and the area where the first fixing layer 23 is present. It is As shown in FIGS. 4 and 5, the first connection protection layer 24 is arranged on the surface of the first electrode sheet 12 opposite to the dielectric layer 11 (the first outer surface 12c of the first electrode sheet 12). It protects the first conducting portion 21b of the one lead wire 21 and the first fixing layer 23 . In particular, the first connecting protective layer 24 covers the portions of the first electrode sheet 12 that are not protected by the first main protective layer 14 .

The first connection protective layer 24 is joined by a first connection fusion layer 25 made of a fusion material. Specifically, as shown in FIGS. 4 to 6, the first connection protection layer 24 is exposed from the first lead wire 21 and the first outer surface 12c of the first electrode sheet 12 by the first connection fusion layer 25. and the first fixing layer 23 .

That is, the first connection fusion layer 25 joins the boundary portion between the first connection protection layer 24 and the first lead wire 21 . Furthermore, the first connection fusion layer 25 joins the boundary portion between the first connection protection layer 24 and the first electrode sheet 12 . Specifically, the first connecting fusion layer 25 joins boundary regions including the first outer surface 12c of the first electrode sheet 12 and the inner peripheral surfaces of the first through holes 12a.

Here, in this example, a portion of the first connection protection layer 24 functions as the first connection fusion layer 25 that joins the first lead wire 21 and the like. In other words, the first connection fusion layer 25 is arranged as part of the first connection protection layer 24 and joins the first lead wire 21 and the like to the first connection protection layer 24 . In addition, the first connection fusion layer 25 can also be bonded to the first connection protection layer 24 as a separate member to bond the first lead wire 21 and the like to the first connection protection layer 24 .

Further, part of the first connection protective layer 24 is also joined to the first main protective layer 14 by the first connection fusion layer 25 . Therefore, the first connection protective layer 24 is integrated with the sheet body portion 10 . Furthermore, part of the first connection protective layer 24 is also joined to the first fusion restriction layer 22 by the first connection fusion layer 25 via the first through holes 12a of the first electrode sheet 12. .

The first connection fusion layer 25 is formed by applying heat to the material of the first connection protective layer 24 made of thermoplastic elastomer, as described above. Therefore, the first connection fusion layer 25 is made of the same material component as the first connection protection layer 24 . That is, the first connection fusion layer 25 is formed without substantially changing the material components of the first connection protective layer 24 . This means that the first splice layer 25 does not contain components such as volatile adhesives and organic solvents.

Here, in the above example, the first electrode sheet 12 and the first conduction portion 21 b of the first lead wire 21 are electrically connected by the first fixing layer 23 . Alternatively, the transducer 1 may be configured without the first adhesion layer 23 . In other words, the first connection protection layer 24 may be fixed by the first connection fusion layer 25 in a state in which the first electrode sheet 12 and the first conductive portion 21b of the first lead wire 21 are electrically connected. can. In this case, in a state where the first electrode sheet 12 and the first conductive portion 21b of the first lead wire 21 are in contact with each other, the first connection protective layer 24 is formed by the first connection fusion layer 25 so that the first electrode sheet 12 and the first electrode sheet 12 It joins to the first conductive portion 21 b of the first lead wire 21 . Furthermore, by bonding the first connection protective layer 24 to the first fusion restricting layer 22 via the first connection fusion layer 25, the first electrode sheet 12 and the first conductive portion 21b of the first lead wire 21 are connected. can be fixed securely.

A configuration of the second connection portion 30 will be described. The second connection portion 30 has substantially the same configuration as the first connection portion 20 . The second lead wire 31 includes a second lead wire main body 31a covering the wire with an insulating material, and a second conductive portion 31b exposing the wire. A second lead wire main body 31 a of the second lead wire 31 is arranged on the surface (second outer surface 15 c ) of the second electrode sheet 15 opposite to the dielectric layer 11 . A second conductive portion 31 b of the second lead wire 31 is arranged on the second surface side of the dielectric layer 11 . The second conductive portion 31 b may be arranged on the second outer surface 15 c side of the second electrode sheet 15 or may be arranged so as to be entangled with the second electrode sheet 15 . The second conductive portion 31 b is electrically connected to the second electrode sheet 15 .

The second fusion regulation layer 32, the second fixing layer 33, the second connection protection layer 34, and the second connection fusion layer 35 are the first fusion regulation layer 22, the first adhesion layer 23, and the first connection protection layer, respectively. Layer 24 is constructed substantially similar to first splice fusing layer 25 . Therefore, detailed description of these will be omitted.

(2. Manufacturing method of electrostatic sheet)
A method of manufacturing an electrostatic sheet that constitutes the transducer 1 will be described with reference to FIGS. 4, 5, and 7-10. Below, a portion including the seat main body portion 10 and the first connection portion 20 will be mainly described. Here, since the second connection portion 30 is manufactured in the same manner as the first connection portion 20, detailed description thereof will be omitted.

First, the material 11a of the dielectric layer 11, the first electrode sheet 12, and the second electrode sheet 15, which constitute the sheet main body 10, are prepared. Here, the material 11a of the dielectric layer 11 is composed of, from the bottom side of FIG. and the material of the first main protective layer 14 .

Furthermore, the materials for the first lead wire 21, the first fusion restricting layer 22, and the first connection protective layer 24, which constitute the first connecting portion 20, are prepared. Here, the material of the first connection protection layer 24 constitutes the material of the first connection fusion layer 25 and the first connection protection layer 24 . Further, the materials for the second lead wire 31, the second fusion restricting layer 32, and the second connection protection layer 34, which constitute the second connection portion 30, are prepared. Here, the material of the second connection protection layer 34 constitutes the second connection fusion layer 35 and the second connection protection layer 34 .

Next, as shown in FIG. 7, (a) the second electrode sheet 15, (b) the material 11a of the dielectric layer 11, (c) the first fusion restricting layer 22, and (d) the first electrode sheet 12 A laminated body is formed by laminating them in order (laminated body forming step: S1). 7, the second electrode sheet 15, the material of the second main protective layer 17, the material of the second main bonding layer 16, the dielectric layer 11, the material of the first main bonding layer 13, the first main The material of the protective layer 14, the first fusion restricting layer 22, and the first electrode sheet 12 are laminated in this order.

Further, although not shown, the second electrode is arranged so as to be symmetrical with the first fusion restricting layer 22 at a portion offset from the first fusion restricting layer 22 in the plane direction of the material 11a of the dielectric layer 11. A second fusion restricting layer 32 forming the second connection portion 30 is arranged on the sheet 15 side.

Subsequently, the entire laminate is heated while being pressed in the thickness direction (pressure heating step: S2). As a result, the first surface side of the material 11a of the dielectric layer 11 made of thermoplastic elastomer is melted. Then, as shown in FIG. 8, the first electrode sheet 12 is embedded in the first surface side of the material 11a of the dielectric layer 11 except for the area facing the first fusion restricting layer 22 . Thus, a portion of the material 11 a of the dielectric layer 11 forms the first main fusing layer 13 to join the dielectric layer 11 and the first electrode sheet 12 . In other words, the first main fusion layer 13 joins the dielectric layer 11 and the first electrode sheet 12 in the region other than the region facing the first fusion restricting layer 22 . Furthermore, a part of the material 11a of the dielectric layer 11 covers the first outer surface 12c side of the first electrode sheet 12 in the region other than the region facing the first fusion restricting layer 22, thereby providing the first main protection. A layer 14 is formed.

Furthermore, in the region facing the first fusion restricting layer 22, the material 11a of the dielectric layer 11 forms the first main fusion layer 13, and the inner surfaces of the dielectric layer 11 and the first fusion restricting layer 22 to join. Here, the first fusion-bonding restricting layer 22 regulates fusion-bonding of the first main fusion-bonding layer 13 to the first electrode sheet 12 . Therefore, the first main fusion layer 13 is not joined to a portion of the first electrode sheet 12 by the first fusion restricting layer 22 , and a portion of the first electrode sheet 12 is outside the first main fusion layer 13 . is placed exposed to

The first main fusion layer 13 does not exist at least in the central portion of the outer surface side of the first fusion restricting layer 22 . On the other hand, the first main fusion layer 13 is arranged around the outer edge portion on the outer surface side of the first fusion regulation layer 22 . That is, the outer edge portion of the first fusion restricting layer 22 is embedded in the first main fusion layer 13 .

Further, a portion of the material 11a of the dielectric layer 11 on the second surface side is melted. Then, although not shown, the second electrode sheet 15 is embedded in the second surface side of the material 11a of the dielectric layer 11 in a region other than the region facing the second fusion restricting layer 32 . That is, the second main fusion layer 16 joins the dielectric layer 11 and the second electrode sheet 15 in a region other than the region facing the second fusion restricting layer 32 . Furthermore, a part of the material 11a of the dielectric layer 11 covers the second outer surface 15c side of the second electrode sheet 15 in a region other than the region facing the second fusion restricting layer 32, thereby providing a second main protection. A layer 17 is formed. The region facing the second fusion restricting layer 32 is the same as the region facing the first fusion restricting layer 22 .

Subsequently, as shown in FIG. 9, the first lead wire 21 is arranged on the first outer surface 12c side of the first electrode sheet 12 (lead wire arrangement step: S3). Similarly to the first lead wire 21, the second lead wire 31 is arranged on the second electrode sheet 15 side (lead wire arrangement step: S3).

Here, in the case of manufacturing the electrostatic sheet of the first example shown in FIG. 4, the entire first conductive portion 21b of the first lead wire 21 is connected to the first electrode sheet 12 of the first electrode sheet 12 as shown in FIG. It is arranged on the outer surface 12c side. In this manner, the first conductive portion 21 b of the first lead wire 21 is electrically connected to the first electrode sheet 12 .

On the other hand, in the case of manufacturing the electrostatic sheet of the second example shown in FIG. 5, the first conducting portions 21b of the first lead wires 21 are arranged so as to be entangled with the first electrode sheet 12, although not shown. In the case of manufacturing the electrostatic sheet of the second example shown in FIG. 5, the step of entangling the first conductive portions 21b of the first lead wires 21 with the first electrode sheet 12 is the pressure heating step described above. It can also be done in advance.

Subsequently, as shown in FIG. 10, in the connection region between the first conductive portion 21b of the first lead wire 21 and the first electrode sheet 12, a first fixing layer is formed by a conductive bonding material such as solder or conductive resin. 23 is formed (fixed layer forming step: S4). That is, the first electrode sheet 12 exposed in the region facing the first fusion restricting layer 22 and the first conductive portion 21b of the first lead wire 21 are electrically connected by the first fixing layer 23. is fixed with Since the first electrode sheet 12 is exposed due to the presence of the first fusion restricting layer 22, the first electrode sheet 12 and the first conducting portions 21b of the first lead wires 21 are easily and reliably electrically connected. be done. Furthermore, the second conductive portion 31b of the second lead wire 31 and the second electrode sheet 15 are electrically connected by the second fixing layer 33, similarly to the formation of the first fixing layer 23 (S4).

Subsequently, as shown in FIGS. 4 and 5 , in the region facing the first fusion restricting layer 22 , the first connection protection layer 24 protects the first electrode sheet 12 and the first conductive portion of the first lead wire 21 . 21b and the first fixing layer 23 are covered (connection protective layer placement step: S5).

In this example, the material of the first connection protection layer 24 is arranged outside the first electrode sheet 12, the first conducting portions 21b of the first lead wires 21, and the first fixing layer 23, and is applied in the thickness direction. It is heated while being pressed (connection protection layer fusing step: S6). As a result, the first connection fusion layer 25 formed by melting the material of the first connection protection layer 24 is connected to the first electrode sheet 12, the first conductive portion 21b of the first lead wire 21, and the first fixing layer 23. , join the first fusion restricting layer 22 . Further, a portion of the first splice layer 25 is also bonded to the first main protective layer 14 . Thus, the first connection protective layer 24 covers the area facing the first fusion restricting layer 22 .

Further, similarly to the first connection protective layer 24, the second connection protective layer 34 is connected by the second connection fusion layer 35 to the second electrode sheet 15, the second conductive portion 31b of the second lead wire 31, and the second fixed portion. It is bonded to the layer 33, the second fusion restricting layer 32, and part of the second main protective layer 17 (connection protective layer arranging step: S5, connection protective layer fusion bonding step: S6).

Therefore, the first fusion restricting layer 22 prevents the first main fusion layer 13 from being joined to a portion of the first electrode sheet 12 , and ensures that a portion of the first electrode sheet 12 is securely attached to the first main fusion layer 13 . is placed outside the Therefore, it becomes easy and reliable to electrically connect the first conductive portion 21b of the first lead wire 21 to the first electrode sheet 12 . Furthermore, by arranging a part of the first electrode sheet 12 outside the first main adhesive layer 13 , the first fixing layer 23 or the first connection protection layer 24 separates the first electrode sheet 12 and the first lead. The state in which the wire 21 is electrically connected to the first conductive portion 21b can be fixed.

1: transducer, 10: sheet main body, 10a: transducer, 10b: terminal, 11: dielectric layer, 11a: material, 12: first electrode sheet, 12a: first through hole, 12b: first inner surface, 12c: first outer surface, 13: first main adhesive layer, 14: first main protective layer, 15: second electrode sheet, 15a: second through hole, 15b: second inner surface, 15c: second outer surface, 16 : second main bonding layer, 17: second main protective layer, 20: first connecting portion, 21: first lead wire, 21a: first lead wire main body, 21b: first conductive portion, 22: first fusion 23: First fixing layer 24: First connection protection layer 25: First connection fusion layer 30: Second connection portion 31: Second lead wire 31a: Second lead wire main body 31b: second conductive portion, 32: second fusion regulation layer, 33: second fixing layer, 34: second connection protective layer, 35: second connection fusion layer

Claims (15)

a dielectric layer;
a first electrode sheet provided with a plurality of first through holes and arranged on the first surface side of the dielectric layer;
formed of a fusible material, disposed as at least a portion of the dielectric layer on the first surface side, or joined to the first surface of the dielectric layer as a separate member, the dielectric layer and the first a first main fusion layer that joins one electrode sheet by fusion bonding of the fusion material;
partially disposed between the first electrode sheet and the first main adhesive layer, and restricting the first main adhesive layer from being fused to the first electrode sheet; a first fusion restricting layer that arranges at least part of the outside of the first main fusion layer;
a transducer. 2. The transducer according to claim 1, wherein said first fusion restricting layer is made of a material capable of restricting passage of said fusion material. 3. The transducer according to claim 1, wherein the outer edge of said first fusion restricting layer is embedded in said first main fusion layer. The first main fusion layer embeds a portion of the first electrode sheet in a region where the first fusion restricting layer does not exist, and the portion of the first electrode sheet is the first main fusion bond. 4. A transducer according to any one of claims 1-3, arranged so as not to be exposed to the outside of the layer. The transducer according to any one of claims 1 to 4, wherein said first fusion restricting layer is arranged in a non-bonded state with said first electrode sheet. The transducer according to any one of claims 1 to 5, wherein said first fusion restricting layer is made of a material having a softening point higher than that of said fusion material. 7. The transducer according to claim 6, wherein said first fusion regulation layer is a resin sheet. The transducer further
8. The method of claim 1-7, further comprising a first lead wire electrically connected to a portion of the first electrode sheet which is disposed outside the first main fusion layer by the first fusion restricting layer. A transducer according to any one of the preceding clauses. The transducer further
In a region facing said first fusion restricting layer, said first electrode sheet and said first lead wire are fixed in an electrically connected state, and comprising a first fixing layer made of a conductive bonding material. Item 9. The transducer according to item 8. The transducer further
10. The transducer according to claim 8, further comprising a first connection protective layer covering said first electrode sheet and said first lead wire in a region facing said first fusion restricting layer. The transducer further
formed of a fusion material, disposed as at least a part of the first connection protective layer or joined to the first connection protection layer as a separate member, and the first electrode sheet and the 11. The transducer of claim 10, comprising a first splice fusing layer joining with the first splice protective layer. 12. The transducer according to any one of claims 8 to 11, wherein the conductive portion of said first lead wire is entwined with said first electrode sheet in a region facing said first fusion restricting layer. A method of manufacturing a transducer according to any one of claims 1-12,
forming a laminate by laminating the dielectric layer, the material of the first main fusion layer, the first fusion regulation layer, and the first electrode sheet in this order;
By heating the laminated body from the first outer surface side of the first electrode sheet, the material of the first main fusion layer is melted, and the region excluding the region facing the first fusion restricting layer In the above, the dielectric layer and the first electrode sheet are joined by the first main fusion layer, and the first electrode sheet is exposed in a region facing the first fusion restricting layer, A method of manufacturing a transducer. A method of manufacturing a transducer according to claim 9, comprising:
forming a laminate by laminating the dielectric layer, the material of the first main fusion layer, the first fusion regulation layer, and the first electrode sheet in this order;
By heating the laminated body from the first outer surface side of the first electrode sheet, the material of the first main fusion layer is melted, and the region excluding the region facing the first fusion restricting layer wherein the dielectric layer and the first electrode sheet are joined by the first main fusion layer, and the first electrode sheet is exposed in a region facing the first fusion restricting layer;
A method of manufacturing a transducer, wherein the first electrode sheet and the first lead wire exposed in the region facing the first fusion restricting layer are electrically connected and fixed by the first fixing layer. A method of manufacturing a transducer according to claim 10, comprising:
forming a laminate by laminating the dielectric layer, the material of the first main fusion layer, the first fusion regulation layer, and the first electrode sheet in this order;
By heating the laminated body from the first outer surface side of the first electrode sheet, the material of the first main fusion layer is melted, and the region excluding the region facing the first fusion restricting layer wherein the dielectric layer and the first electrode sheet are joined by the first main fusion layer, and the first electrode sheet is exposed in a region facing the first fusion restricting layer;
The first connection protective layer covers the first electrode sheet and the first lead wire in a state where the first lead wire is connected to the first electrode sheet in the region facing the first fusion restricting layer. , the method of manufacturing the transducer.

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