Contact element automatic locking and quick detaching device for electric connector

Abstract

The utility model discloses a contact element automatic locking and quick dismounting device used for an electric connector, comprising a contact element, an insulator, a clamping sleeve, a lock sleeve and a pressure spring, the contact element passes through a central through hole of the insulator, the circumferential wall of the clamping sleeve is provided with a plurality of U-shaped grooves and forms a plurality of elastic clamping strips, and the elastic clamping strips are arranged in the U-shaped grooves. The inner wall of the suspended end portion of each elastic clamping strip is provided with an arc-shaped surface protruding portion, the contact piece is provided with a clamping groove, the clamping sleeve is arranged outside the contact piece in a sleeving mode, the arc-shaped surface protruding portions are arranged in the clamping groove, the clamping sleeve is arranged in the insulator and cannot move axially or rotate, and the contact piece is sleeved with the lock sleeve and the compression spring. And one end of the lock sleeve is sleeved outside the plurality of arc-shaped surface lug bosses, is positioned in the insulator, is propped by the pressure spring and has an elastic force close to the clamping sleeve. According to the utility model, an automatic locking function when the contact element is assembled and a rapid dismounting function when the contact element is dismounted can be realized, application is convenient, related parts are not damaged, and the service life of a product is prolonged.

Description

Technical Field

[0001] The utility model relates to a local structure of an electric connector, in particular to an automatic locking and quick-release device for a contact piece of the electric connector. Background Art

[0002] The contact pieces of an electrical connector are mainly in the form of pins and sockets. For an electrical connector that needs to be plugged in at both ends, the contact piece adopts a structure with a pin at one end and a socket at the other end.

[0003] At present, there are two main connection structures between the contact piece of an electrical connector and the shell of the electrical connector, one is a fixed connection structure, and the other is a detachable connection structure. In the former, the contact piece is assembled into the insulator in the shell when the electrical connector is produced, and it cannot be disassembled and removed afterwards; in the latter, the contact piece and the shell, insulator and other components are first processed during the production of the electrical connector, and then assembled. The contact piece can be disassembled and removed as needed during use. This structure can better meet application needs, so it is more and more widely used.

[0004] The basic structure of a traditional electrical connector with detachable contacts is that a toothed sleeve is used to connect the contact and the housing. There are two types of toothed sleeves according to the different ways in which the toothed sleeves are set. One is to fix the toothed sleeve inside the insulator in the housing, and the other is to fix the toothed sleeve on the contact. Both structures have the following disadvantages: 1. The toothed sleeve is punched from metal strips and has relatively low strength, which causes the contact to collapse and be damaged easily when subjected to a large axial drag force (the spring petal of the toothed sleeve is compressed and easily becomes unstable and collapses); 2. Disassembly requires the use of special tools, which makes disassembly difficult, and the toothed sleeve is easily damaged during disassembly, resulting in failure. Especially in heavy-load electrical connectors, since the contact is large, the drag force it is subjected to is often hundreds of Newtons, resulting in a very high failure rate of the toothed sleeve, and it is very laborious to disassemble. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned problem and to provide an automatic locking and quick-release device for contacts of an electrical connector, which is convenient for installing and removing contacts.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] A contact automatic locking and quick release device for an electrical connector, comprising a contact and an insulator, wherein the cylindrical contact passes through the central through hole of the insulator, and the contact automatic locking and quick release device for an electrical connector further comprises a clamping sleeve, a locking sleeve and a compression spring, wherein the circumferential wall of the cylindrical clamping sleeve is provided with a plurality of "U"-shaped grooves which penetrate inside and outside and are evenly distributed along the circumferential direction, and the opening end of the "U"-shaped groove is located at one end of the clamping sleeve, and the portion of the circumferential wall of the clamping sleeve located between any two adjacent "U"-shaped grooves forms an elastic clamping strip, and each of the elastic clamping strips An outwardly convex arc-shaped protrusion is provided on the inner wall of the suspended end portion, a circular groove is provided on the circumferential outer wall in the middle of the contact piece, the sleeve is sleeved on the outside of the contact piece and multiple arc-shaped protrusions are placed in the groove, the sleeve is placed in the central through hole of the insulator and cannot move axially or rotate in the contact piece, the cylindrical locking sleeve and the compression spring are both sleeved on the outside of the contact piece, one end of the locking sleeve is sleeved on the outside of multiple arc-shaped protrusions and is located in the central through hole of the insulator and is supported by the compression spring to have an elastic force close to the sleeve.

[0008] Preferably, in order to facilitate the function that the ferrule cannot move axially and cannot rotate and to facilitate processing and assembly, the insulator includes a first insulator and a second insulator close to each other, the central through hole of the first insulator and the central through hole of the second insulator are interconnected, and a plurality of convex strips uniformly distributed in the circumferential direction and protruding outward are provided on the wall of the central through hole of the first insulator close to the second insulator, and the plurality of convex strips are respectively placed in a plurality of corresponding "U"-shaped grooves, and the aperture of one end of the central through hole of the second insulator close to the first insulator is enlarged and a first annular step is formed at the aperture change position, and the end of the ferrule away from the arc-shaped surface protrusion is placed in the central through hole of the second insulator and blocked by the first annular step, and the corresponding ends of the plurality of arc-shaped surface protrusions and the locking sleeve are all located in the central through hole of the first insulator away from the second insulator.

[0009] Preferably, in order to better realize the automatic locking and quick release functions and facilitate the smooth sliding of the arc-shaped raised portion of the sleeve, the outer diameter of the middle part of the contact piece is larger than the outer diameter of the two ends and the middle part forms a large diameter section of the contact piece, the slot is arranged on the large diameter section of the contact piece, and the transition surface on one end of the large diameter section of the contact piece close to the second insulator is a circular conical surface.

[0010] Preferably, in order to limit the moving range of the locking sleeve, the aperture of a section of the central through hole of the locking sleeve close to the second insulator is enlarged and a locking sleeve annular step is formed at the aperture change position, and the end of the large diameter section of the contact piece away from the second insulator blocks the locking sleeve annular step so that the locking sleeve cannot move in a direction close to the second insulator.

[0011] Preferably, in order to facilitate better positioning of the contact piece, the outer diameter of the end of the contact piece close to the second insulator is reduced and a contact piece annular step is formed at the position where the outer diameter changes, the aperture of the portion of the central through hole of the second insulator between the first annular step and the end away from the first insulator is larger than the aperture of the end away from the first insulator and a second annular step is formed at the position where the aperture changes, and the contact piece annular step is located in the middle section of the central through hole of the second insulator and is blocked by the second annular step.

[0012] Preferably, in order to facilitate installation of the compression spring, an annular groove is provided on the circumferential outer wall of the contact piece and a clamping ring is installed in the annular groove, and two ends of the compression spring are respectively in contact with the clamping ring and one end of the locking sleeve.

[0013] Preferably, in order to facilitate holding the lock sleeve by hand during disassembly, an annular groove is provided on the circumferential outer wall of the lock sleeve near the compression spring and the annular groove is located outside the central through hole of the insulator.

[0014] The beneficial effects of the utility model are:

[0015] The utility model designs the clamping sleeve, the locking sleeve and the compression spring and cooperates with the contact piece and the insulator. When assembling the contact piece, it is only necessary to directly insert the contact piece into the central through hole of the insulator. Under the interaction of the compression spring, the locking sleeve and the clamping sleeve, the multiple arc-shaped surface protrusions on the clamping sleeve are automatically placed in the clamping groove and are positioned by the locking sleeve from the peripheral direction, thereby realizing the automatic locking function when the contact piece is assembled; when disassembling, it is only necessary to pull the locking sleeve outwards, and after the multiple arc-shaped surface protrusions are completely separated from the locking sleeve, continue to pull the locking sleeve and the contact piece, the multiple arc-shaped surface protrusions can slide and separate from the clamping groove, and the contact piece can be separated from the clamping sleeve and the insulator, thereby realizing the quick disassembly function of the contact piece. It is not only convenient to use, but also related parts will not be damaged, thereby improving the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional exploded view of the contact automatic locking and quick-release device for an electrical connector according to the utility model before assembly;

[0017] Figure 2 It is a front cross-sectional view of a first insulator and a second insulator of the contact automatic locking and quick release device for an electrical connector according to the utility model;

[0018] Figure 3 It is a front cross-sectional view of the automatic locking and quick-release device for contacts of an electrical connector after assembly according to the utility model;

[0019] Figure 4This is one of the main cross-sectional views of the contact automatic locking and quick release device for an electrical connector during assembly according to the utility model;

[0020] Figure 5 This is the second front cross-sectional view of the contact automatic locking and quick-release device for an electrical connector during assembly according to the utility model. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] like Figure 1-Figure 3 As shown, the contact automatic locking and quick-release device for an electrical connector of the utility model comprises a contact 4 (a pin in the figure, one end of which is provided with a blind hole for crimping or welding a wire, and can also be a socket according to the invention), an insulator (refer to the first insulator 5 and the second insulator 7 described below), a clamping sleeve 6, a locking sleeve 3 and a compression spring 2. The cylindrical contact 4 passes through the central through hole of the insulator, and the circumferential wall of the cylindrical clamping sleeve 6 is provided with a plurality of "U"-shaped grooves 61 that penetrate inside and outside and are evenly distributed along the circumferential direction, and the open end of the "U"-shaped groove 61 is located at one end of the clamping sleeve 6, and any two adjacent "U"-shaped grooves on the circumferential wall of the clamping sleeve 6 are located The part between 61 forms an elastic clip 63, and the inner wall of the suspended end of each elastic clip 63 is provided with an outwardly convex arc-shaped surface protrusion 62, and a circular groove 43 is provided on the circumferential outer wall of the middle part of the contact piece 4. The sleeve 6 is mounted on the outside of the contact piece 4 and multiple arc-shaped surface protrusions 62 are placed in the groove 43. The sleeve 6 is placed in the central through hole of the insulator and cannot move axially in the contact piece 4 and cannot rotate. The cylindrical locking sleeve 3 and the compression spring 2 are both mounted on the outside of the contact piece 4, and one end of the locking sleeve 3 is mounted on the outside of the multiple arc-shaped surface protrusions 62 and is located in the central through hole of the insulator and is supported by the compression spring 2 and has an elastic force close to the sleeve 6.

[0023] like Figure 1-Figure 3 As shown, the utility model also discloses the following multiple more optimized structures:

[0024] In order to facilitate the function that the ferrule 6 cannot move axially and cannot rotate and to facilitate processing and assembly, the insulator includes a first insulator 5 and a second insulator 7 close to each other, and the central through hole (not marked in the figure) of the first insulator 5 and the central through hole 71 of the second insulator 7 are interconnected. A plurality of convex strips 51 uniformly distributed in the circumferential direction and protruding outward are provided on the wall of the central through hole of the first insulator 5 near the second insulator 7. The plurality of convex strips 51 are respectively placed in a plurality of "U"-shaped grooves 61 corresponding to each other. The aperture of one end of the central through hole 71 of the second insulator 7 close to the first insulator 5 is enlarged and a first annular step 72 is formed at the aperture change position. The end of the ferrule 6 away from the arc-shaped surface protrusion 62 is placed in the central through hole 71 of the second insulator 7 and is blocked by the first annular step 72. The corresponding ends of the plurality of arc-shaped surface protrusions 62 and the locking sleeve 3 are all located in the central through hole of the first insulator 5 away from the second insulator 7.

[0025] In order to better realize the automatic locking and quick release functions and facilitate the smooth sliding of the arc-shaped surface protrusion 62 of the sleeve 6, the outer diameter of the middle part of the contact piece 4 is larger than the outer diameter of the two ends and the middle part forms a contact piece large diameter section 42, and the card groove 43 is arranged on the contact piece large diameter section 42. The transition surface of one end of the contact piece large diameter section 42 close to the second insulator 7 is a circular conical surface 44.

[0026] In order to limit the moving range of the locking sleeve 3, the aperture of a section of the central through hole of the locking sleeve 3 close to the second insulator 7 is enlarged and a locking sleeve annular step 32 is formed at the aperture change position, and the end of the contact piece large diameter section 42 away from the second insulator 7 blocks the locking sleeve annular step 32 so that the locking sleeve 3 cannot move in the direction close to the second insulator 7.

[0027] In order to facilitate better positioning of the contact piece 4, the outer diameter of the end of the contact piece 4 close to the second insulator 7 is reduced and a contact piece annular step 45 is formed at the position where the outer diameter changes. The aperture of the portion of the central through hole 71 of the second insulator 7 between the first annular step 72 and the end away from the first insulator 5 is larger than the aperture of the end away from the first insulator 5 and a second annular step 73 is formed at the position where the aperture changes. The contact piece annular step 45 is located in the middle section of the central through hole 71 of the second insulator 7 and is blocked by the second annular step 73.

[0028] In order to facilitate the installation of the compression spring 2 , an annular groove 41 is provided on the circumferential outer wall of the contact piece 4 and a clamping ring 1 is installed in the annular groove 41 . Both ends of the compression spring 2 are in contact with the clamping ring 1 and one end of the locking sleeve 3 respectively.

[0029] In order to facilitate holding the lock sleeve 3 by hand during disassembly, an annular groove 31 is provided on the circumferential outer wall of the lock sleeve 3 near the compression spring 2 and the annular groove 31 is located outside the central through hole of the insulator.

[0030] like Figure 1-Figure 5 As shown, when used, the ferrule is first placed in the central through hole of the first insulator 5, and the multiple convex strips 51 are respectively placed in the multiple "U"-shaped grooves 61 corresponding to each other, and then the second insulator 7 is closely attached to the first insulator 5, and the end of the ferrule 6 away from the arc-shaped protrusion 62 is placed in the central through hole 71 of the second insulator 7 and blocked by the first annular step 72, so that the function of the ferrule 6 being unable to move axially and rotate can be achieved; then the first insulator 5 and the second insulator 7 are installed as a whole in the housing (not shown in the figure) of the electrical connector and cannot rotate; then the connector is connected to the first insulator 5 and the second insulator 7 is connected to the first insulator 5 and the second insulator 7 is connected to the first insulator 5 and the second insulator 7 is connected to the second ... One end of the contact 4 is crimped or welded to the wire, and then the clamp ring 1, the compression spring 2, and the locking sleeve 3 are respectively mounted on the contact 4; then the pin end of the contact 4 is inserted into the central through hole of the first insulator 5 and pushed all the way. When the suspended ends of the multiple arc-shaped protrusions 62 of the clamping sleeve 6 contact the contact annular step 45 on the contact 4, the multiple arc-shaped protrusions 62 and the multiple elastic clamping strips 63 are slowly stretched out and elastically deformed in the peripheral direction, and then the contact 4 continues to move in the same direction; when one end of the locking sleeve 3 contacts the suspended ends of the multiple arc-shaped protrusions 62 of the clamping sleeve 6, as shown in FIG. Figure 4 As shown, the lock sleeve 3 cannot move further and starts to compress the compression spring 2, while the contact 4 continues to move in the same direction; when the multiple arc-shaped protrusions 62 of the clamping sleeve 6 completely correspond to the clamping groove 43 of the contact 4, under the elastic action of the elastic clamping strip 63 itself, the multiple arc-shaped protrusions 62 are automatically placed in the clamping groove 43, and then under the elastic action of the compression spring 2, the lock sleeve 3 moves in the direction close to the second insulator 7 and is sleeved outside the multiple arc-shaped protrusions 62 until the annular step 32 of the lock sleeve is blocked by the end of the large-diameter section 42 of the contact far away from the second insulator 7, as shown in FIG. Figure 5 As shown ( Figure 3 In this state, the plurality of arc-shaped protrusions 62 cannot be separated from the slots 43, thus realizing the automatic locking function during the assembly of the contact member 4.

[0031] When it is necessary to remove the contact piece 4, hold the annular groove 31 of the locking sleeve 3 by hand and pull it in the direction away from the second insulator 7. The locking sleeve 3 overcomes the elastic force of the compression spring 2 and moves in the direction away from the second insulator 7. When the locking sleeve 3 is completely separated from the multiple arc-shaped surface protrusions 62, under the elastic action of the elastic clip 63 itself, the multiple arc-shaped surface protrusions 62 elastically move in the peripheral direction and separate from the clip groove 43. Then the locking sleeve 3 and the contact piece 4 can continue to move in the direction away from the second insulator 7 until the contact piece 4 is completely removed from the second insulator 7 and the first insulator 5, and the quick removal of the contact piece 4 is completed.

[0032] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.

Claims

1. A contact automatic locking and quick release device for an electrical connector, comprising a contact and an insulator, wherein the cylindrical contact passes through a central through hole of the insulator, and is characterized in that: The contact automatic locking and quick release device for the electrical connector also includes a ferrule, a locking sleeve and a compression spring. The circumferential wall of the cylindrical ferrule is provided with a plurality of "U"-shaped grooves that penetrate inside and outside and are evenly distributed in the circumferential direction, and the open end of the "U"-shaped groove is located at one end of the ferrule. The portion of the circumferential wall of the ferrule located between any two adjacent "U"-shaped grooves forms an elastic clamping strip. The inner wall of the suspended end of each elastic clamping strip is provided with an outwardly convex arc-shaped surface protrusion. A circular groove is provided on the circumferential outer wall of the middle part of the contact. The ferrule is sleeved outside the contact and a plurality of the arc-shaped surface protrusions are placed in the slot. The ferrule is placed in the central through hole of the insulator and cannot move axially and cannot rotate in the contact. The cylindrical locking sleeve and the compression spring are both sleeved outside the contact. One end of the locking sleeve is sleeved outside the plurality of the arc-shaped surface protrusions and is located in the central through hole of the insulator and is supported by the compression spring to have an elastic force close to the ferrule.

2. The contact automatic locking and quick release device for an electrical connector according to claim 1, characterized in that: The insulator includes a first insulator and a second insulator close to each other, the central through hole of the first insulator and the central through hole of the second insulator are interconnected, a plurality of convex strips uniformly distributed in the circumferential direction and protruding outward are provided on the wall of the central through hole of the first insulator near the second insulator, the plurality of convex strips are respectively placed in a plurality of "U"-shaped grooves corresponding to each other, the aperture of one end of the central through hole of the second insulator close to the first insulator is enlarged and a first annular step is formed at the aperture change position, the end of the ferrule away from the arc-shaped surface protrusion is placed in the central through hole of the second insulator and blocked by the first annular step, and the corresponding ends of the plurality of arc-shaped surface protrusions and the locking sleeve are all located in the central through hole of the first insulator away from the second insulator.

3. The contact automatic locking and quick release device for an electrical connector according to claim 2, characterized in that: The outer diameter of the middle part of the contact piece is larger than that of the two ends and the middle part forms a large diameter section of the contact piece. The slot is arranged on the large diameter section of the contact piece. The transition surface of one end of the large diameter section of the contact piece close to the second insulator is a circular conical surface.

4. The contact automatic locking and quick release device for an electrical connector according to claim 3, characterized in that: The diameter of a section of the central through hole of the locking sleeve close to the second insulator increases and forms a locking sleeve annular step at the position where the diameter changes, and the end of the large diameter section of the contact piece away from the second insulator blocks the locking sleeve annular step so that the locking sleeve cannot move in the direction close to the second insulator.

5. The contact automatic locking and quick release device for an electrical connector according to claim 2, characterized in that: The outer diameter of one end of the contact piece close to the second insulator is reduced and a contact piece annular step is formed at the position where the outer diameter changes. The aperture of the portion of the central through hole of the second insulator between the first annular step and the end away from the first insulator is larger than the aperture of the end away from the first insulator and a second annular step is formed at the position where the aperture changes. The contact piece annular step is located in the middle section of the central through hole of the second insulator and is blocked by the second annular step.

6. The contact automatic locking and quick release device for an electrical connector according to any one of claims 1 to 5, characterized in that: An annular groove is provided on the circumferential outer wall of the contact piece and a clamping ring is installed in the annular groove. Two ends of the compression spring are in contact with the clamping ring and one end of the locking sleeve respectively.

7. The contact automatic locking and quick release device for an electrical connector according to claim 6, characterized in that: An annular groove is provided on the circumferential outer wall of the lock sleeve near the compression spring and the annular groove is located outside the central through hole of the insulator.

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