Electrical connector

Abstract

The utility model discloses an electrical connector, including a front insulator, a contact spring and a rear insulator, wherein the front insulator is provided with a hollow portion, a through hole at the longitudinal front end of the hollow portion and a joint portion at the longitudinal rear end of the hollow portion, and the contact spring is provided with a cantilever portion, a spherical protrusion at the longitudinal front end of the cantilever portion and an embedded portion extending longitudinally backward from the cantilever portion. The contact spring is assembled on the front insulator, the cantilever portion is accommodated in the hollow portion, the spherical protrusion protrudes into the through hole, and the embedded portion extends longitudinally backward out of the joint portion. The rear insulator is injection molded at the joint portion of the front insulator and wrapped around the periphery of the embedded portion, that is, the contact spring is assembled on the front insulator and then injection molded on the rear insulator, the contact spring adopts a cantilever beam structure, and the contact area adopts a stretching and stamping process to form a spherical protrusion, so as to achieve a long service life and all-round scratch resistance; on the basis of meeting the service life, the overall ultra-thin effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connectors, in particular to a contact type electric connector. Background Art

[0002] With the continuous advancement of technology, the performance requirements for contact-type electrical connectors are constantly improving. They will face the challenge of ultra-thin and long life, and the performance requirements for electrical connectors are getting higher and higher. Common contact-type electrical connectors use an integrated rubber core, which cannot achieve a cantilever beam movable structure, thus affecting the service life of the electrical connector; moreover, the elastic arms of existing small contact-type electrical connectors can only be assembled to ensure that they can move up and down, left and right, but the assembly results in a larger volume, which is not conducive to the lightweight of the finished product, and there is a disadvantage of insufficient space in application scenarios with a smaller height.

[0003] Therefore, it is hoped to provide a new electrical connector to overcome the above defects. Utility Model Content

[0004] The utility model aims to provide a contact-type electrical connector, which has the advantage of being lightweight.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an electrical connector, comprising a front insulator, a contact spring connected to the front insulator, and a rear insulator located at the longitudinal rear end of the front insulator. The front insulator is provided with a hollow portion extending in the longitudinal direction, a through hole located at the longitudinal front end of the hollow portion, and a joint portion located at the longitudinal rear end of the hollow portion, and the contact spring is provided with a cantilever portion extending in the longitudinal direction, a spherical protrusion located at the longitudinal front end of the cantilever portion, and an embedded portion extending from the cantilever portion in the longitudinal direction backward. The contact spring is assembled on the front insulator, the cantilever portion is accommodated in the hollow portion, the spherical protrusion protrudes into the through hole, and the embedded portion extends out of the joint portion in the longitudinal direction backward; the rear insulator is injection molded at the joint portion of the front insulator, and the rear insulator is wrapped around the periphery of the embedded portion.

[0006] In a preferred embodiment, the front insulator is provided with an annular portion protruding upward from the top surface, and the through hole vertically penetrates the annular portion and is connected to the hollow portion.

[0007] In a preferred embodiment, the spherical protrusion is formed by protruding upward from the longitudinal front end of the cantilever portion, and the spherical protrusion is received in the through hole and protrudes upward from the top surface of the annular portion.

[0008] In a preferred embodiment, the front insulator is provided with a limiting groove located between the combining portion and the hollow portion, and the rear insulator is provided with a convex ridge accommodated in the limiting groove.

[0009] In a preferred embodiment, the combining portion is provided with a plurality of bosses extending rearward in the longitudinal direction, and the embedding portion of the contact spring is provided between two adjacent bosses.

[0010] In a preferred embodiment, the coupling portion is provided with a through hole vertically penetrating the boss, and the rear insulator is provided with a groove corresponding to accommodating the boss and a pin protruding upward from the bottom wall of the groove, and the pin is filled in the through hole.

[0011] In a preferred embodiment, the rear insulator is provided with a positioning hole recessed downward from the top surface and a receiving cavity recessed upward from the bottom surface, and the upper surface of the embedded portion is exposed in the positioning hole and the lower surface is exposed in the receiving cavity.

[0012] In a preferred embodiment, the rear insulator is provided with a wire groove located at the bottom and extending longitudinally, the wire groove passes through the longitudinal rear end face of the rear insulator and is connected to the accommodating cavity, the electrical connector includes a cable with a wire core, the cable is accommodated in the wire groove and the wire core extends into the accommodating cavity to contact the embedded portion.

[0013] In a preferred embodiment, the contact spring is provided with two external connection parts located at the longitudinal ends of the embedded part, and the two external connection parts extend out of the rear insulator in the longitudinal direction and are located at two lateral sides of the cable.

[0014] In a preferred embodiment, the electrical connector includes a base plate connected to the bottom surface of the front insulator and an adhesive located between the front insulator and the base plate, and the base plate is made of glass fiber and fixed to the bottom surface of the front insulator by the adhesive.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the contact spring is assembled on the front insulator, the cantilever part is accommodated in the hollow part, the spherical protrusion protrudes into the through hole, and the embedded part extends out of the joint part in the longitudinal direction; the rear insulator is injection molded at the joint part of the front insulator, and the rear insulator is wrapped around the periphery of the embedded part. A two-piece insulator is adopted, the contact spring is assembled on the front insulator and then the rear insulator is injection molded, the contact spring adopts a cantilever beam structure, and the contact area adopts a stretching and stamping process to form a spherical protrusion. The two are perfectly combined to achieve a long life and all-round scratch resistance; and the volume is reduced on the basis of meeting the service life, so that the overall electrical connector achieves an ultra-thin effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of an electrical connector in a preferred embodiment of the utility model.

[0017] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the electrical connector from another angle is shown.

[0018] Figure 3 yes Figure 1 A front view of the electrical connector is shown.

[0019] Figure 4 yes Figure 1 An exploded schematic diagram of the electrical connector is shown.

[0020] Figure 5 yes Figure 2 A partially exploded schematic diagram of the electrical connector is shown. DETAILED DESCRIPTION

[0021] See also Figures 1 to 5 As shown, a preferred embodiment of the utility model discloses an electrical connector 100, which includes a front insulator 10, a contact spring 20 connected to the front insulator 10, and a rear insulator 30 located at the longitudinal rear end of the front insulator 10. In this embodiment, the number of the contact springs 20 can be set to 1, 2, 3 or more, preferably 3.

[0022] See also Figures 2 to 5 As shown, taking the number of the contact springs 20 as 3 as an example, the front insulator 10 is provided with a hollow portion 11 extending in the longitudinal direction, an annular portion 12 located at the longitudinal front end of the hollow portion 11, and a connecting portion 13 located at the longitudinal rear end of the hollow portion 11, and the thickness of the connecting portion 13 is less than the thickness of other parts of the front insulator 10. In this embodiment, the number of the hollow portions 11 is 3 and they are arranged in parallel in the transverse direction, the annular portion 12 is formed by protruding upward from the top surface and is provided with a through hole 121 that vertically penetrates the annular portion 12, and the through hole 121 is connected to the corresponding hollow portion 11.

[0023] The contact spring 20 is provided with a cantilever portion 21 extending in the longitudinal direction, a spherical protrusion 22 located at the longitudinal front end of the cantilever portion 21, and an embedded portion 23 extending backward in the longitudinal direction from the cantilever portion 21, wherein the spherical protrusion 22 is formed by protruding upward from the longitudinal front end of the cantilever portion 21. In this embodiment, the contact spring 20 is assembled on the front insulator 10, specifically, the cantilever portion 21 is accommodated in the corresponding hollow portion 11, the spherical protrusion 22 is accommodated in the through hole 121 and protrudes upward from the top surface of the annular portion 12, and the embedded portion 23 extends backward in the longitudinal direction from the joint portion 13. Among them, the spherical protrusion 22 protrudes into the through hole 121 and is surrounded by the annular portion 12, so that the annular portion 12 plays a role in protecting the spherical protrusion 22.

[0024] The rear insulator 30 is injection molded on the joint portion 13 of the front insulator 10, and the rear insulator 30 is wrapped around the periphery of the embedded portion 23 of the contact spring 20. A two-piece insulator is used, and the contact spring 20 is assembled on the front insulator 10 and then the rear insulator 30 is injection molded. The contact spring 20 adopts a cantilever beam structure, and its contact area adopts a stretching and stamping process to form a spherical protrusion 22. The two are perfectly combined to achieve a long life and all-round scratch resistance; and the volume is reduced on the basis of meeting the service life (the life of up and down movement is 20,000 times, and the life of left and right movement is 10,000 times), so that the electrical connector 100 as a whole achieves an ultra-thin effect.

[0025] The front insulator 10 is provided with a limiting groove 130 between the joint 13 and the hollow part 11, and the rear insulator 30 is provided with a ridge 32 accommodated in the limiting groove 130. The ridge 32 directly overflows the glue to fill the limiting groove 130, which plays a role of limiting in the horizontal and vertical directions, so that the front and rear insulators are accurately aligned. The joint 13 is provided with a plurality of bosses 131 extending backward in the longitudinal direction and a through hole 132 penetrating the boss 131 in the vertical direction, and an embedded part 23 for contacting the elastic sheet 20 is provided between two adjacent bosses 131. The rear insulator 30 is provided with a groove 31 corresponding to the boss 131 and a pin 310 protruding upward from the bottom wall of the groove 31, and the pin 310 is filled in the through hole 132. The above-mentioned cooperation makes the front and rear insulators closely connected.

[0026] The rear insulator 30 is provided with a positioning hole 33 sunken downward from the top surface and a receiving cavity 34 sunken upward from the bottom surface, and the upper surface of the embedded portion 23 is exposed in the positioning hole 33 and the lower surface is exposed in the receiving cavity 34. The depth of the positioning hole 33 is less than the thickness of the rear insulator 30. In order to prevent the lack of glue during injection molding, the positioning hole is added on the basis of the upper and lower clamping contact spring 20 of the traditional injection molding process, and the workpiece in the hole is used to push the contact spring 20, which solves the problem of lack of glue at the thinnest part and also plays a role in heat dissipation of the conductor.

[0027] The electrical connector 100 includes a bottom plate 40 connected to the bottom surface of the front insulator 10 and an adhesive 41 located between the front insulator 10 and the bottom plate 40. The bottom plate 40 is made of glass fiber and is fixed to the bottom surface of the front insulator 10 by the adhesive 41. The front insulator 10 is provided with a peripheral wall 14 extending downward from the peripheral edge. The peripheral wall 14 is surrounded by the peripheral edge of the bottom plate 40 to limit the relative position of the bottom plate 40 installed on the bottom surface of the front insulator 10, and the peripheral wall 14 does not extend downward beyond the bottom surface of the bottom plate 40.

[0028] The rear insulator 30 is further provided with a wire groove 35 located at the bottom and extending in the longitudinal direction, the wire groove 35 penetrates the longitudinal rear end surface of the rear insulator 30 and communicates with the accommodating cavity 34, the electrical connector 100 further includes a cable 50 having a wire core, the cable 50 is accommodated in the wire groove 35 and the wire core extends into the accommodating cavity 34 to contact the embedded portion 23. At the same time, each of the contact springs 20 is further provided with two external connection portions 24 located at the longitudinal ends of the embedded portion 23, the two external connection portions 24 extend out of the rear insulator 30 in the longitudinal direction and are located at the lateral sides of the cable 50.

[0029] In this embodiment, the manufacturing process of the electrical connector 100 is as follows:

[0030] 1. The insulator 10 is formed by one-step injection molding;

[0031] 2. Assemble several contact springs 20 on the front insulator 10 and put them together into the injection mold;

[0032] 3. The rear insulator 30 is secondary-injected at the joint of the front insulator 10 , and the rear insulator 30 is wrapped around the outer periphery of the embedded portion 23 of the contact spring 20 .

[0033] 4. Perform gas performance (including insulation continuity and withstand voltage testing), flatness, contact height and pin testing on the finished electrical connector 100.

[0034] In the present invention, the contact spring 20 is assembled on the front insulator 10, the cantilever part 21 is accommodated in the hollow part 11, the spherical protrusion 22 protrudes into the through hole 121, and the embedded part 23 extends out of the joint part 13 in the longitudinal direction; the rear insulator 30 is injection molded on the joint part 13 of the front insulator 10, and the rear insulator 30 is wrapped around the outer periphery of the embedded part 23. A two-piece insulator is adopted, the contact spring 20 is assembled on the front insulator 10 and then the rear insulator 30 is injection molded, the contact spring 20 adopts a cantilever beam structure, and its contact area adopts a stretching and stamping process to form a spherical protrusion 22, the two are perfectly combined to achieve a long life and all-round scratch resistance; and the volume is reduced on the basis of meeting the service life, so that the electrical connector 100 as a whole achieves an ultra-thin effect.

[0035] In summary, the above are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention. That is, all simple equivalent changes and modifications made according to the claims and description of the present invention should still fall within the scope of the present invention.

Claims

1. An electrical connector, comprising a front insulator, a contact spring connected to the front insulator, and a rear insulator located at the longitudinal rear end of the front insulator, the front insulator is provided with a hollow portion extending in the longitudinal direction, a through hole located at the longitudinal front end of the hollow portion, and a joint portion located at the longitudinal rear end of the hollow portion, the contact spring is provided with a cantilever portion extending in the longitudinal direction, a spherical protrusion located at the longitudinal front end of the cantilever portion, and an embedded portion extending backward in the longitudinal direction from the cantilever portion; characterized in that: The contact spring is assembled on the front insulator, the cantilever portion is accommodated in the hollow portion, the spherical protrusion protrudes into the through hole, and the embedded portion extends backward along the longitudinal direction out of the connecting portion; the rear insulator is injection molded on the connecting portion of the front insulator, and the rear insulator is wrapped around the outer periphery of the embedded portion.

2. The electrical connector according to claim 1, wherein: The front insulator is provided with an annular portion protruding upward from the top surface, and the through hole vertically penetrates the annular portion and is connected to the hollow portion.

3. The electrical connector according to claim 2, wherein: The spherical protrusion is formed by protruding upward from the longitudinal front end of the cantilever portion. The spherical protrusion is received in the through hole and protrudes upward from the top surface of the annular portion.

4. The electrical connector according to claim 1, wherein: The front insulator is provided with a limiting groove between the combining portion and the hollow portion, and the rear insulator is provided with a convex ridge accommodated in the limiting groove.

5. The electrical connector according to claim 1, wherein: The combining portion is provided with a plurality of bosses extending backwards in the longitudinal direction, and the embedding portion of the contact spring is arranged between two adjacent bosses.

6. The electrical connector according to claim 5, wherein: The joint portion is provided with a through hole which vertically penetrates the boss, and the rear insulator is provided with a groove which corresponds to the boss and a pin which protrudes upward from the bottom wall of the groove, and the pin is filled in the through hole.

7. The electrical connector according to claim 1, wherein: The rear insulator is provided with a positioning hole recessed downward from the top surface and a receiving cavity recessed upward from the bottom surface. The upper surface of the embedded part is exposed in the positioning hole and the lower surface is exposed in the receiving cavity.

8. The electrical connector according to claim 7, wherein: The rear insulator is provided with a wire groove located at the bottom and extending longitudinally, the wire groove passes through the longitudinal rear end surface of the rear insulator and is connected to the accommodating cavity, the electrical connector includes a cable with a wire core, the cable is accommodated in the wire groove and the wire core extends into the accommodating cavity to contact the embedded portion.

9. The electrical connector according to claim 8, wherein: The contact spring is provided with two external connection parts located at the longitudinal ends of the embedded part, and the two external connection parts extend out of the rear insulator in the longitudinal direction and are located at two lateral sides of the cable.

10. The electrical connector according to claim 1, wherein: The electrical connector comprises a bottom plate connected to the bottom surface of the front insulator and an adhesive located between the front insulator and the bottom plate. The bottom plate is made of glass fiber and is fixed to the bottom surface of the front insulator by the adhesive.

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