JPH07201395A - connector - Google Patents

Abstract

PURPOSE:To prevent the leak of oil, etc., and moreover inexpensively manufacture a connector having simple structure by integrally constituting a pressure contact terminal and connector housing by insert-molding. CONSTITUTION:A pressure contact terminal 23 is insert-molded integrally with a connector housing 22 in a connector 21. The housing 22 is formed on a fitting part 24 opened for fitting one side end part, the front of the housing 22, to a mating connector, and the electric joint 23a of the pressure contact terminal 23 is protruded in the fitting part 24. The other side end part, a back, is formed on a connection part 25 for connecting a wire 31, the cable connection part 23b of the terminal 23 is exposed, and the standing wall 23g of the cable connection part 23b is provided in an airtight condition together with the housing 22. Moreover, the connector 21 is formed so that the synthetic resin material of the housing 22 can enter into a groove 23e, provided on the locking part 23d of the terminal 23, to retain the terminal 23 in a condition where forming material is locked to the locking part 23d. However in the connector 21, the flow of the synthetic resin material into the connection part 23b is prevented in a condition where the synthetic resin is blocked by the standing wall 23g.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector used for electrical connection to an electric device, and more particularly to a control element for a hydraulic circuit arranged in a housing such as an automatic transmission for an automobile and a connector outside the housing. It is suitable for use when connecting to a control device by a wire.

[0002]

2. Description of the Related Art Generally, an automobile transmission is
A hydraulic circuit is provided in the housing, and a valve, a hydraulic servomotor, an accumulator, a solenoid valve, etc. are arranged as control elements in the hydraulic circuit. The hydraulic circuit and a control device provided outside the housing are wire-connected so that a control signal can be transmitted through the connector. Oil should not leak out of the housing.

Therefore, conventionally, a connector as shown in FIGS. 8 and 9 has been used. 8 is a front view of the connector, and FIG. 9 is a sectional view taken along the line AA of FIG. The connector housing 2 constituting the connector 1 has an insertion opening 3 for inserting the wire 5 at one end and a terminal opening 6 for arranging the connection terminal 4 at the other end. It is provided as a cylindrical casing having a mouth 6 penetrating therethrough. The connection terminal 4 is inserted and held in an inner plate 12 formed separately from the connector housing 2, and the inner plate 12 is fitted and fixed in the connector housing 2.

An O-ring 8 for preventing oil leakage from the transmission case 7 is fitted in the annular groove 6 formed on the outer surface of the connector housing 2. In addition, the insertion port 3 is provided in the connector housing 2.
The epoxy resin 9 is filled to prevent the oil that has entered further from flowing through the wire 5 to the tip side of the connection terminal 4 due to the capillary phenomenon, and the insertion port 3 is prevented from leaking and deteriorating the resin. A rubber stopper 11 for prevention is fitted.

The connector 1 is assembled by connecting the connection terminal 4
After caulking and connecting the wire 5 and the wire 5, the connection terminal 4 is press-fitted and held in the inner plate 12. Next, the inner plate 12 in which the connection terminals 4 are press-fitted is inserted into the connector housing 2, and further fixed to the bush 13 for positioning. After that, the insertion port 3 is sealed with the rubber plug 11, and the epoxy resin 9 is filled into the space surrounded by the connector housing 2 and the inner plate 12 and cured. The connection terminal 4 and the wire 5 are fixed in the connector housing 2 as the resin cures. The connector 1 thus formed is attached to the transmission case 7 after the O-ring 8 is attached to the annular groove 6. With the above configuration, in the connector 1, oil leakage due to the capillary phenomenon that occurs between the core wires of the wire 5 is sealed by the epoxy resin 9, and further the bush 13, the wire 5, and the connection terminal 4 are provided.
The sealing between them is performed by the epoxy resin 9 and the rubber plug 11, and a short circuit between the connection terminals 4 due to leakage of oil or the like is completely prevented.

[0006]

However, in the connector 1 having the above-mentioned structure, when the epoxy resin 9 is filled with the required amount in one injection step, the epoxy resin 9 is filled in a short time. Since it does not turn to the corners of the required part, it overflows from the injection position. For this reason, it is necessary to inject the epoxy resin 9 at least twice in a divided manner, resulting in poor workability. Further, in order to cure the injected epoxy resin 9, various facilities such as a curing chamber and a temperature adjusting device are required, which is one of the causes of increasing the manufacturing cost due to the poor workability. Further, a rubber stopper 11 is required to prevent the epoxy resin 9 from leaking.
Installation workability of is also bad. An object of the present invention was made in view of the above circumstances, and it is an object of the present invention to provide a connector that can prevent oil and the like from leaking out, and has a simple structure and can be manufactured at low cost.

[0007]

To achieve the above object, a connector according to the present invention comprises a connector housing, an electric connecting portion for electrically connecting to a connecting terminal of a mating connector, and an electric wire connecting portion for press-connecting a wire. A pressure contact terminal having a locking portion positioned between the electric connecting portion and the electric wire connecting portion and locked to the connector housing is integrally formed. In the connector, the pressure contact terminal may have an uneven groove on the outer peripheral surface of the engaging portion, the groove being orthogonal to the axial direction. Further, the connector is characterized in that the electric wire connecting portion of the press contact terminal is bent in such a manner that both edges of the conductive plate are bent upright, and a press contact blade is vertically provided inside and a box-like shape is formed with an upper surface and a rear end opened. It is a thing. Further, the connector is characterized in that an electric wire crimping portion wound around the outer peripheral surface of the electric wire and crimping and holding the wire is provided by extending the rear end of the electric wire connecting portion and folding back the inside.

[0008]

In the connector having the above-mentioned structure, the pressure contact terminal having the engaging portion capable of making good penetration with the molding material of the connector housing, for example, the synthetic resin, and having good liquid sealing property is integrated by insert molding. . Therefore, the adhesion between the connector housing and the pressure contact terminal is improved, and the terminal can be prevented from coming out from the connector housing and the leakage of liquid such as oil can be prevented. Further, since the electric wire connecting portion is provided in a box shape formed so as to include the press contact blade, it is possible to suitably prevent the resin from flowing into the electric wire connecting portion when the press contact terminal is insert-molded, and,
Since the electric wire connecting portion is in an airtight state with the connector housing, infiltration of liquid such as oil into the connector is prevented. Furthermore, since the wire crimping part that holds the wire is arranged inside the wire connecting part, the pressure contact stress that acts when crimping and connecting the wire is dispersed throughout the wire connecting part. The influence on the connector housing can be reduced as compared with the case where the portion directly contacts the connector housing.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the connector according to the present invention will be described in detail with reference to FIGS. 1 and 2 are a horizontal sectional view and a vertical sectional view showing the structure of the connector, FIG. 3 is a perspective view showing the structure of the pressure contact terminal, and FIGS. 4 and 5 are external and external perspective views showing the appearance of the connector. FIGS. 6, 6 and 7 are front and rear views showing the shape of the connector.

FIG. 3 shows a pressure contact terminal as a connection terminal applied to the present invention. The press contact terminal 23 is formed by bending a single punched conductive metal plate, and has a flat plate-like electrical connection portion 23a that comes into contact with the connection terminal of the mating connector so that it can be energized, and the top and rear ends are open. An electric wire connecting portion 23b, which is formed in a vertically long box-like shape and to which wires are press-contacted and connected,
Located between the electric connection portion 23a and the electric wire connection portion 23b,
It includes a locking portion 23d that locks with a molding material of the connector housing 22 described later. The wire connecting portion 23b is a standing wall 23g formed by bending both edges of a conductive metal plate in an upright state.
A press-contact blade 23c for press-contacting the wire 31 is vertically provided inside the space, and a rear end thereof is extended and a standing wall 23g.
It has a wire crimping portion (insulation barrel) 23f folded back in between. The wire crimping portion 23f is similar to the conventional one.
The wire 31 is held on the outer peripheral surface of the wire by pressure bonding.

The characteristic construction of this embodiment is that the engaging portion 23d is formed in a U-shaped cross section, and a large number of concave and convex grooves 23e are formed on the outer peripheral surface of the engaging portion 23d. That is, they are continuously formed orthogonally to the direction. In addition, the electric connection portion 23a is formed by double-folding a metal plate in order to secure strength.

As shown in FIGS. 1 and 2, the connector 21 has a press-fit terminal 23 insert-molded integrally with a connector housing 22, and its external shape is provided in a cylindrical body as shown in FIGS. 4 and 5. There is. Then, as shown in FIGS. 4 and 6, the connector housing 22 has one front end portion formed in a fitting portion 24 that is open for fitting with a mating connector. Pressure contact terminal 23
The electrical connection portion 23a of the is projected. The other end, which is the back surface, has the wire 3 as shown in FIGS. 5 and 7.
1 is formed in the connecting portion 25 for connecting the pressure contact terminal 2
The wire connection part 23b of No. 3 is exposed and its standing wall 23g
Are provided in an airtight state with the connector housing 22.

Further, as shown in FIGS. 1 and 2, the connector 21 is formed by molding so that the synthetic resin material of the connector housing 22 enters into the groove 23e provided in the engaging portion 23d of the press contact terminal 23. Holds the press contact terminal 23 in a state of being locked to the locking portion 23d. However, connector 2
1 is a connector housing 2 as shown in FIGS. 4 and 5.
The synthetic resin material No. 2 is prevented from flowing into the electric wire connecting portion 23b in a state of being blocked by the standing wall 23g of the press contact terminal 23. As a result, the press-contact terminal 23 is prevented from coming off by the bite of the connector housing 22 being made good, and the infiltration distance is substantially extended with respect to the oil that is trying to infiltrate along the surface of the terminal and the sealing property is improved. Has been done. Further, since the press contact terminal 23 is formed in a box shape provided with the standing wall 23g, the standing wall 23g also serves as a mold at the time of molding to prevent the synthetic resin material from entering, and the electric wire connecting portion 23b is well secured. In addition to being able to perform, the connector 21 can be adhered to the connector housing 22 and the connector 21 such as oil can be provided.
Prevents intrusion.

Locking portion 23d of the connector housing 22
An annular groove 26 is formed in the outer periphery substantially corresponding to, and an O-ring 28 for fitting an oil seal with the transmission case 27 to which the connector 21 is attached is fitted into the annular groove 26.

Explaining the connector structure excluding the above structure, the fitting portion 24 is provided with a guide wall 24a so that the fitting wall 24 can be easily inserted into the mating connector. Further, as described above, a partition wall 25a filled with a synthetic resin material is provided between the adjacent pressure contact terminals of the connection portion 25, and the electric wire connection portions 23b are isolated from each other in an insulating state. . The pressure contact terminal 23 can press and connect the wire 31 to the pressure contact blade 23c to perform the pressure contact connection as in the conventional case.
3c is sandwiched between standing walls 23g, and standing wall 2
Since 3g collides with the partition wall 25a, the outward spreading due to press fitting of the wire is suitably prevented. Further, since the wire crimping portion 23f is disposed in the wire connecting portion 23b and crimped as shown in FIG. 2, the pressure contact stress acting at the time of crimping is dispersed in the wire connecting portion 23b so that the electric wire crimping portion 23f is directly connected to the connector housing 22. It does not reach. Therefore, damage to the connector housing 22 is avoided.

Next, the assembly of the connector 21 will be described. The connector 21 is assembled by insert molding in which a pressure contact terminal 23 is positioned at a predetermined position in a molding die prepared in advance and a synthetic resin material is press-fitted. At the time of this insert molding, a large number of grooves 23e are filled with the synthetic resin material, and the adhesion is remarkably improved. As a result, as described above, the press contact terminal 23 is prevented from coming off, and
Infiltration of oil can be prevented. Further, even if a gap that would try to infiltrate is formed, since the uneven portion is formed on the outer peripheral surface of the pressure contact terminal 23, that is, the surface, it is transmitted between the pressure contact terminal 23 and the connector housing 22. The infiltration distance of the oil to be infiltrated is extended, and the sealing property can be improved. The improvement of the sealing property is not limited to the formation of the groove 23e, and can be realized by applying the sealing agent to the entire outer peripheral surface of the locking portion. Further, preferably, the groove 23e and the sealant may be combined.

After the press contact terminal 23 and the connector housing 22 are insert-molded in this manner, the wire 31 is pushed into the press contact blade 23c for press contact connection, and then the annular groove 26 is formed.
The O-ring 28 is fitted into the connector to complete the connector 21 as shown in FIG. The connector 21 is attached to the transmission case 27 by press-fitting it together with the O-ring 28 into the attachment opening 27a formed in the case 27. When the connector 21 is attached to the transmission case 27, the O-ring 28 serves as an oil seal between the transmission case 27 and the case 27.
The oil seal inside is a pressure contact terminal 23 made by insert molding.
To the connector housing 22 and the groove 2
3e and. Therefore, the step of injecting the epoxy resin into the connector housing for the oil seal as described in the conventional example becomes completely unnecessary, and the rubber plug 1
Since No. 1 is also unnecessary, the workability at the time of assembling the connector 21 can be dramatically improved, and the cost can be reduced, in combination with the number of assembling steps and the number of parts.

By improving the sealing property as described above, the oil that has risen due to the capillary phenomenon returns to the inside of the case 27 from the cut end of the wire 31. Further, since the electric wire connecting portion 23b of the press contact terminal 23 is provided in a shape that prevents resin from entering, the press contact terminal 23 can be integrally formed with the connector housing 22. In addition, the total length L of the connector 21 can be reduced, and the protrusion amount l from the transmission case 27 can also be reduced. Furthermore, the pressure contact terminal 2
3 has a box shape in which the wire connecting portion 23b is surrounded by the standing wall 23g, so that resin intrusion at the time of integral molding is prevented, the wire connecting portion 23b is well secured, and the wire tightening portion 23f is Since it is provided in the electric wire connecting portion 23b, it is possible to minimize the influence of the pressure contact stress generated during the pressure contact.

[0019]

As described above, according to the connector of the present invention, the press contact terminal is provided with the engaging portion having the groove or the like for improving the biting into the molding material constituting the connector housing. The connector housing and the connector housing are integrated by insert molding. Therefore, the adhesion between the connector housing and the pressure contact terminal is improved, the sealability can be improved without using a sealing material such as epoxy resin, and the pressure contact terminal can be prevented from coming off. Since the molding material and the terminal are insert-molded, the number of parts and the number of working steps can be reduced, and the cost of the product can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a connector according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a connector according to an embodiment of the present invention.

FIG. 3 is a perspective view of a press contact terminal.

FIG. 4 is a perspective view showing an external shape of the connector of FIG.

5 is another perspective view showing the external shape of the connector of FIG. 1. FIG.

FIG. 6 is a front view of the connector.

FIG. 7 is a rear view of the connector.

FIG. 8 is a front view showing an example of a conventional connector.

FIG. 9 is a cross-sectional view showing a configuration of a conventional connector.

[Explanation of symbols]

 21 connector 22 connector housing 23 pressure contact terminal 23a electric contact part 23b electric wire connection part 23c pressure contact blade 23d locking part 23e uneven groove 24 fitting part 25 connection part 26 annular groove 27 transmission case 28 O-ring 31 wire

Claims (4)

[Claims] 1. A connector housing, an electric connection portion that electrically contacts a connection terminal of a mating connector, an electric wire connection portion that press-connects a wire, and an electric connection portion that is located between the electric connection portion and the electric wire connection portion and is locked to the connector housing. A connector characterized by being integrally molded with a press contact terminal having a locking portion. 2. The connector according to claim 1, wherein an outer peripheral surface of the engaging portion is provided with an uneven groove that is orthogonal to the axial direction of the press contact terminal. 3. The electric wire connecting portion is provided in a box shape in which both edges of a conductive plate are bent in an upright state, a pressing blade is hung vertically inside, and an upper surface and a rear end are opened. The connector described in 1. 4. The connector according to claim 3, further comprising an electric wire crimping portion which extends a rear end of the electric wire connecting portion and is folded back inside to be crimped and wound around an outer peripheral surface of the wire.