CN110609359A - A kind of MPO fiber optic connector - Google Patents

Abstract

The invention relates to the technical field of connector devices, in particular to an MPO optical fiber connector, which can solve the problems in the prior art that the spring limit seat of the optical fiber connector is not easy to be installed in place and there is a hidden danger of falling out. The MPO fiber optic connector includes a housing assembly, the housing assembly includes an outer housing and an inner housing, the inner housing has an inner cavity, and a ferrule, a spring for pushing the ferrule forward and a spring for aligning the ferrule are arranged in the inner cavity. The spring limit seat is limited by the spring. The spring limit seat is provided with a clamping protrusion, and the inner shell is provided with a clamping recess adapted to the clamping protrusion. The rear end of the spring limit seat is provided with a The stop part of the inner casing is blocked along the front and rear direction. When the stop part of the spring limit seat forms a stop fit with the inner casing, the stop surface on the snap-in protrusion is located at the block of the snap-in recess as a whole. before stopping.

Description

A kind of MPO fiber optic connector

technical field

The invention relates to the technical field of connector devices, in particular to an MPO optical fiber connector.

Background technique

With the rapid development of data communications such as big data and cloud computing, the market's requirements for network bandwidth are growing in a blowout manner, which in turn puts forward higher requirements for optical fiber network density. In optical fiber communication, in order to realize functions such as distribution and switching between different light rays, MOP fiber optic connectors as a multi-core multi-channel plug-in connector are often used. The female fiber optic connector with the hole and the male fiber optic connector with guide pin are docked and locked on the adapter, and the push force of the compression spring is used to maintain the physical contact between the paired ferrules, so as to realize the multi-fiber interconnection of two optical cables even.

For example, an optical fiber connector disclosed in a patent document with the authorized announcement number CN202453542U and the authorized announcement date of 2012.09. , a ferrule is provided, and the ferrule is used to connect the optical fiber in the optical cable and can be mated with other ferrules. On the rear side of the ferrule along the mating direction, a spring and a spring limiting seat for limiting the spring are provided. The specific structure of the spring limiting seat is a frame structure that is combined to form a frame structure that restricts the spring to move along its radial direction. , respectively the first frame and the second frame, the first frame and the second frame are respectively arranged on the left and right sides of the spring (both sides perpendicular to the insertion direction), for the first frame or the second frame, its specific The form is a cantilever extending along the insertion direction. The cantilever is provided with a snap-in protrusion that is matched with the inner casing, that is, a barb. When the ferrule, the spring and the spring limit seat enter the inner casing, they can be connected to the inner casing through the snap-fit protrusion. The clamping concave part of the cantilever is matched to realize the clamping connection between the cantilever and the inside of the inner casing. And in order to ensure the positioning accuracy of the spring limiting seat in the inner housing, a flange protruding outward as a stopper is provided at the tail of the spring limiting seat, which can be matched with the rear end surface of the inner housing to stop The position of the spring limit seat in the inner housing is positioned.

However, this optical fiber connector also has a structural defect: when assembling the optical fiber connector, in order to ensure the installation position of the spring limiting seat, the flange and the snap-in protrusion on the spring limiting seat need to be in contact with the inner shell at the same time. body to maintain as precise a fit as possible, but in actual use, when the locking protrusion on the spring limiting seat may be in a position where it is not engaged with the inner housing or only abuts but not engaged, the position of the spring limiting seat The flange on the tail end may have been engaged with the rear end face of the inner casing, so that the spring limit seat cannot move forward in the inner casing, and the barb on the spring limit seat cannot be in contact with the inner casing. The clamping recess forms a snap fit, which leads to improper installation of the spring limiting seat, and the ferrule and the spring limiting seat will come out of the inner housing when the optical fiber connector is used.

Contents of the invention

The purpose of the present invention is to provide an MPO optical fiber connector, which can solve the problems in the prior art that the spring limit seat of the optical fiber connector is not easy to be installed in place and there is a hidden danger of falling out.

In order to achieve the above purpose, the MPO optical fiber connector in the present invention adopts the following technical scheme:

An MPO optical fiber connector, comprising a shell assembly, the shell assembly includes an outer shell and an inner shell, the inner shell has an inner cavity, a ferrule, a spring for pushing the ferrule forward and a For the spring limiting seat for limiting the spring, the spring limiting seat is provided with a snap-in protrusion, and the inner housing is provided with a snap-in recess adapted to the snap-in protrusion, and the rear end of the spring limiting seat is provided with a There is a stopper that cooperates with the inner casing along the front and back direction. When the stopper of the spring limit seat forms a stopper fit with the inner casing, the stopper surface on the snap-in protrusion is located in the snap-in recess as a whole in front of the stop surface.

Its beneficial effect is that: by setting the stop part of the spring limit seat and the inner casing to form a stop fit, the stop surface on the snap-fit protrusion is located in front of the stop face of the snap-fit recess as a whole, to Ensure that when the spring limiting seat is engaged with the inner housing, the stop surface of the locking protrusion must be located between the locking protrusion of the spring limiting seat and the locking recess of the inner housing. Before the stop surface, and the stop part of the spring limit seat has also realized the stop fit between the inner housing, the spring limit seat can only retreat in the shell so that the stop surface of the clamping protrusion and the The stop surface of the clamping concave part fits together. At this time, although the stop part of the spring limit seat has been disengaged from the inner casing, the spring limit seat is still limited by the cooperation between the clamping protrusion and the clamping concave part, and cannot withdraw from the inner casing, ensuring that the spring limit seat will not come out of the inner casing.

Further, the blocking surface on the locking protrusion is an inclined surface, and the side of the inclined surface close to the spring limiting seat is located on the side of the inclined surface away from the spring limiting seat.

Its beneficial effect is that: the stop surface on the snap-in protrusion is set as a slope, and the side of the slope close to the spring limit seat is located on the side of the slope away from the spring limit seat so that the slope forms a backward inclined slope , the inclined surface makes the barb-shaped structure formed by the snap-in protrusions make the snap-in protrusions more stable during the snap-fitting, and the matching strength is higher.

Further, the spring limit seat includes a base part located at the rear end of the spring limit seat, the base part is inserted into the rear end opening of the inner cavity as a whole, and the rear end surface of the base part is located in the inner shell in the front-rear direction. Near the rear end surface of the body; further, the rear end surface of the base body is flush with the rear end surface of the inner casing, or the rear end surface of the base body is recessed into the rear end opening of the inner cavity or protrudes from the rear end opening of the inner cavity No more than 5mm.

The beneficial effect is that: when the stop portion of the spring limiting seat is engaged with the inner casing, the rear end surface of the base part is located near the rear end surface of the inner casing, which can ensure the stable cooperation between the spring limiting seat and the inner casing; Arranging the rear end surface of the base body flush with the rear end surface of the inner housing can reduce the radial size of the MPO fiber optic connector, while the rear end surface of the base body is recessed into the rear end opening of the inner cavity or protrudes from the rear end opening of the inner cavity Not greater than 5mm, arranged in such a form, can ensure the complete fit between the spring limit seat and the inner housing.

Further, at least one side edge of the rear opening of the inner cavity is provided with chamfers to form a flaring structure, and the rear end of the base part is provided with a flaring adapter section, and the flaring adapter section has a Sloped sides for mouth structure adaptation.

The beneficial effect is that: a flaring structure is provided at the opening of the rear end of the inner cavity, and an inclined side is provided on the base body correspondingly, and the flaring structure and the inclined side form a guide surface for guiding the cooperation of the two, which is convenient for the inner casing Cooperating with the spring limiting seat, the inner housing and the spring limiting seat are inserted more smoothly.

Further, the cross-section of the inner housing is rectangular, and the inclined side is provided on the side of the base part corresponding to the broad side of the rectangle.

The beneficial effect is that: the inclined side is arranged on the side corresponding to the wide side of the rectangle, so that the width of the inner housing and the spring limit seat is increased, and the height is limited, which is convenient for inserting the optical connector into the device.

Further, the root of the locking protrusion and the main body of the spring limiting seat are connected in a circular arc shape.

The beneficial effect is that: an arc-shaped transition connection is provided between the clamping protrusion and the spring limiting seat, which can reduce the stress concentration at the root of the clamping protrusion in the clamping fit, and improve the service life of the spring limiting seat .

Further, an elastic cantilever is respectively provided on both sides of the spring limiting seat corresponding to the broad side of the rectangle, and the locking protrusions are provided on both elastic cantilevers.

The beneficial effect is that an elastic cantilever is arranged on the spring limiting seat, and the elastic cantilever can swing along its axial direction after being stressed, so that the cooperation between the spring limiting seat and the inner casing is more flexible.

Further, a positioning seat is provided between the ferrule and the spring, and a positioning groove is provided on the positioning seat, and the front end of the spring is positioned in the positioning groove along the radial direction.

The beneficial effect is that: a positioning seat is provided between the ferrule and the spring, and the positioning seat can cooperate with the spring limit seat to limit the overall position of the front end of the spring in the inner casing, avoiding partial wear between the spring and the optical fiber .

Further, the spring limiting seat is provided with a limiting surface for limiting the rear end of the spring.

The beneficial effect is that the spring limit seat can limit the overall position of the rear end of the spring in the inner casing, so as to avoid partial wear between the spring and the optical fiber.

Description of drawings

Fig. 1 is the assembly schematic diagram of MPO optical fiber connector among the present invention;

Fig. 2 is a sectional view of the MPO fiber optic connector in the present invention when it is not assembled;

Fig. 3 is a sectional view of the MPO fiber optic connector in the present invention when assembled;

Fig. 4 is a schematic diagram of the mating relationship between the clamping protrusion and the clamping recess of the MPO optical fiber connector in the present invention;

Fig. 5 is a schematic diagram of the local structure of the MPO fiber optic connector in the present invention;

Fig. 6 is a schematic structural view of the spring limit seat of the MPO optical fiber connector in the present invention;

FIG. 7 is a schematic structural view of the positioning seat of the MPO optical fiber connector in the present invention.

In the figure: 1. Inner shell; 11. Inner cavity; 12. Clamping hole; 13. Flaring structure; 2. Ferrule; 3. Spring; 4. Spring limit seat; 41. Barb; 42. Inclined side ; 43. Base part; 44. Spring limiting surface; 5. Positioning seat; 51. Positioning groove.

Detailed ways

The specific implementation manner of the MPO fiber optic connector in the present invention will now be described with reference to the accompanying drawings.

As shown in Figure 1, the MPO optical fiber connector includes a housing assembly, the housing assembly includes an inner housing 1 and an outer housing (not shown in the figure) arranged in a socket, the cross-sectional shape of the inner housing 1 is rectangular, and the inner housing 1 The housing 1 has an inner cavity 11, in which the ferrule 2 arranged in sequence along the insertion direction, the spring 3 for pushing the ferrule 2 forward and the spring limiter for limiting the spring 3 Seat 4. In order to ensure that the ferrule 2, the spring 3 and the spring limit seat 4 are fixed in the inner housing 1, a locking protrusion is provided on the spring limit seat 4, and correspondingly, a The clamping concave part adapted to the clamping protrusion, when the spring limiting seat 4 is clamped in the inner cavity 11, the spring limiting seat 4 will limit the spring 3, and the spring 3 will push the ferrule 2 forward under pressure , at the rear end of the spring limiting seat 4, there is provided a stopper that is engaged with the rear end surface of the inner casing 1 along the insertion direction (ie, the front-rear direction). In order to ensure that the spring limiting seat 4 can be installed in place in the inner housing 1, when the stop part of the spring limiting seat 4 forms a stop fit with the inner housing 1, the entire stop surface on the locking protrusion is positioned at the locking position. Before the stop surface of the recess.

As shown in Figure 2, the inner housing 1 is provided with a locking hole 12 as a locking recess, and the spring limit seat 4 is provided with holes arranged perpendicular to the insertion direction, that is, arranged at intervals along the left and right directions. Two elastic cantilevers, the elastic cantilever will be compressed and deformed when the spring limit seat 4 enters the inner housing 1 and swing left and right. On the sides facing away from each other of the elastic cantilever, there are provided barbs 41 as locking projections. As shown in Figures 3 and 4, the blocking surface of the barb 41 that is engaged with the hole wall of the card hole 12 is a slope that is inclined backwards, and a connection is provided between the barb 41 and the outer surface of the cantilever. The arc transition surface between the two.

The spring limiting seat 4 includes a base part 43 located at the rear end of the spring limiting seat 4. The rear end of the base part 43 is the corresponding part for crimping the cable when the spring limiting seat 4 is in use. The inner cavity 11 is connected with the spring The part corresponding to the base part 43 of the limit seat 4 is an opening structure, and the base part 43 of the spring limit seat 4 is inserted into the inner cavity 11 of the inner housing 1 as a whole, and the rear end surface of the base part 43 is located in the front-rear direction. Near the rear end surface of the opening of the rear end of the chamber 11, chamfers are provided on the edge of the opening of the rear end of the inner cavity 11, so that the opening structure forms a flared structure 13 that expands outwards, while the base portion 43 has a The flaring adaptation section corresponding to the structure 13 has an inclined side 42 adapted to the flaring structure 13 . As shown in FIG. 5 , the inclined side surface 42 is provided on the side of the base portion 43 corresponding to the broad side of the rectangle.

The rear end surface of the base part 43 is located near the rear end surface of the inner casing 1 in the front-rear direction, and there are several situations: the first is that the rear end surface of the base part 43 is flush with the rear end surface of the inner casing 1; the second The rear end surface of the base part 43 is recessed into the rear end opening of the inner cavity 11, and the concave distance is not greater than 5mm; the third type is that the rear end surface of the base part 43 protrudes from the rear end opening of the inner cavity 11, and the convex distance is not greater than 5mm. The above three situations can all be explained that the rear end surface of the base portion 43 is located near the rear end surface of the inner casing 1 in the front-rear direction. In this embodiment, the first situation is used, that is, when the stop portion of the spring limit seat 4 is engaged with the inner housing 1, the barb 41 of the spring limit seat 4 is located at the stop of the locking hole 12. The front of the stop surface, at this time, the spring 3 will push the spring limit seat 4 to withdraw backward, so that the barb 41 is engaged with the clamping hole 12 . When the barb 41 engages with the locking hole 12 , the rear end surface of the base portion 43 is flush with the rear end surface of the inner casing 1 .

For the structure of the spring limit seat 4, as shown in Figure 6, it includes two elastic cantilevers arranged along the left and right directions, and a barb 41 as a snap-in protrusion is provided on the outer surface of the elastic cantilever, and the barb 41 and The inclined side surface 42 on the base portion 43 is arranged forward and backward along the insertion direction. A spring limiting surface 44 for fully limiting the spring 3 is provided on the opposite inner surface of the elastic cantilever. As shown in Figure 7, the positioning seat 5 arranged in front of the spring limiting seat 4 to limit the spring 3 includes a positioning column arranged towards the ferrule 2 and a positioning main body for fixing the spring 3, and the positioning main body is provided with There is a positioning groove 51 restricting the front end of the spring 3. The positioning groove 51 cooperates with the spring limiting surface 44 to restrict the spring 3 in the inner housing 1. After the movement of the spring 3 is restricted, partial wear with the optical fiber will be avoided.

When the operator uses the MPO fiber optic connector of the present invention, as shown in Figure 4, when the spring limiting seat 4 and the positioning seat 5 on the front side and the spring 3 extend into the inner housing 1, the spring limiting seat 4 when the inclined side 42 used as a stopper and the corresponding position of the inner housing 1 form a stop fit, the barb 41 on the elastic cantilever of the spring limit seat 4 is relatively set in the inner housing 1 and the barb There is an interval between the walls of the card holes 12 that are snap-fitted by 41. In order to ensure that the optical fiber connector is installed in place, the blocking surface of the barb 41 facing the side of the card hole 12 is located in the card hole 12 for snapping with the barb 41. before the mating stop surface.

In other embodiments, the number of barbs serving as snap-in protrusions can also be adjusted correspondingly according to the structure of the optical fiber connector.

In other embodiments, the locking protrusion can also be arranged as a planar structure.

In other embodiments, the spring limit seat can be set as a sleeve structure, and no separate cantilever cantilever is provided in the sleeve structure, but the snap-in protrusion is directly arranged on the outer wall of the sleeve structure to be compatible with the inner wall. Housing snap fit.

The specific embodiments described above have further described the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. A kind of MPO optical fiber connector, comprises shell assembly, and shell assembly comprises outer shell and inner shell, and inner shell has inner chamber, is provided with ferrule, is used to push forward the spring of ferrule in inner chamber And the spring limit seat used to limit the spring. The spring limit seat is provided with a snap-in protrusion, and the inner shell is provided with a snap-fit concave part adapted to the snap-in protrusion. The rear of the spring limit seat The end is provided with a stopper that cooperates with the inner casing along the front and rear directions, and the feature is that when the stopper of the spring limit seat forms a stopper fit with the inner casing, the stopper on the snap-in protrusion The entire surface is located in front of the stop surface of the clamping recess. 2. The MPO fiber optic connector according to claim 1, characterized in that: the stop surface on the snap-in protrusion is a slope, and the side of the slope close to the spring limit seat is located on the side of the slope away from the spring limit. side of the seat. 3. The MPO optical fiber connector according to claim 2, characterized in that: the spring limit seat includes a base part located at the rear end of the spring limit seat, and the base part is integrally inserted into the rear end opening of the inner cavity , and the rear end surface of the base part is located near the rear end surface of the inner casing in the front-rear direction; the rear end surface of the base part is flush with the rear end surface of the inner casing, or the rear end surface of the base part is recessed into the inner cavity The rear opening or the rear opening protruding from the inner cavity is not more than 5mm. 4. The MPO optical fiber connector according to claim 3, characterized in that: at least one side edge of the rear opening of the inner cavity is provided with chamfers to form a flared structure, and the rear end of the base part is provided with There is a flaring adapter section having inclined sides adapted to the flaring structure. 5 . The MPO fiber optic connector according to claim 4 , wherein the cross-section of the inner housing is rectangular, and the inclined side is provided on the side of the base part corresponding to the broad side of the rectangle. 6 . 6. The MPO optical fiber connector according to claim 1, 2 or 3, characterized in that: the root of the locking protrusion and the main body of the spring limiting seat are connected in a circular arc shape. 7. The MPO optical fiber connector according to claim 5, characterized in that: the two sides of the spring limit seat corresponding to the wide side of the rectangle are respectively provided with an elastic cantilever, and the two elastic cantilevers are provided with the The snap-in protrusions mentioned above. 8. The MPO fiber optic connector according to claim 1, characterized in that: a positioning seat is provided between the ferrule and the spring, a positioning groove is provided on the positioning seat, and the front end of the spring is radially positioned on the in the positioning slot. 9. The MPO optical fiber connector according to claim 1 or 8, characterized in that: the spring limiting seat is provided with a limiting surface for limiting the rear end of the spring.