Jack assembly, rear sleeve of jack assembly and connector

Abstract

The utility model provides a jack assembly, a rear sleeve of the jack assembly and a connector, and belongs to the field of electric connectors. The jack assembly comprises a rear sleeve and a crown spring, a mounting hole is formed in the front end of the rear sleeve, the crown spring is located in the mounting hole, a crown spring end belt and a connecting strip are arranged, bevel structures are arranged at the two ends of the connecting strip, an avoiding groove extending in the circumferential direction is formed in the inner wall of the mounting hole, and the avoiding groove corresponds to the bevel structures in position. The rear sleeve of the jack assembly is the rear sleeve. The connector includes a housing and a jack assembly mounted within the housing. The receding groove is formed in the inner wall of the mounting hole of the rear sleeve and corresponds to the bevel structure on the crown spring, and the receding groove can allow the connecting strip part at the position close to the bevel structure to deform in the using process, so that stress and deformation at the bevel structure are dispersed, the anti-fatigue capacity of the bevel structure is improved, and the service life of the spring is prolonged. The service life of the crown spring is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of electrical connectors, and particularly relates to a jack assembly, a rear sleeve of the jack assembly, and a connector. Background Art

[0002] In electrical connectors, a crown spring is commonly used as a contact member. The crown spring is formed by stamping a metal sheet with good elasticity into a fence shape and then rolling it into a shape. It includes end bands at both axial ends and connecting strips connected between the end bands. During the process of rolling into a circle, the middle part of the crown spring is waist-shaped, so that the middle part of the connecting strip is concave radially inward to form a throat circle. Since the end bands do not deform during the waist-forming process, a corner structure is formed at both ends of the connecting strip after forming.

[0003] The crown spring is installed inside the rear sleeve of the jack assembly. The outer peripheral walls of both end bands are in contact with the inner wall of the rear sleeve to form an electrical contact. After the pin is inserted into the crown spring, it is in radial contact with the throat circle to form an electrical contact. At this time, the pin is conducted with the rear sleeve through the crown spring. During the process of inserting the pin into the crown spring, the throat circle is subjected to a radial force and expands outward, thereby driving the whole connecting strip to expand outward. However, since the end bands are already in contact with the inner wall of the rear sleeve and cannot expand, the part where the connecting strip is connected to the end bands is difficult to deform. Therefore, the corner structure needs to undergo a large deformation, and the angle of the corner will become larger, resulting in a large stress concentrated at the corner structure. During long-term use, the corner structure will undergo frequent deformation. When the stress is too large or after fatigue, the corner structure is prone to fracture.

[0004] In the prior art, in order to improve the stability of the crown spring in the rear sleeve and reliable electrical conduction, the front end of the crown spring is fixed to the front end of the rear sleeve. The Chinese invention patent application with the publication number CN105470682A and the publication date of April 6, 2016 discloses a jack and an electrical connector using the jack. The jack includes a rear sleeve and a cage spring (i.e., a crown spring) fixed in the inner hole of the rear sleeve through a fixing structure. The fixing structure includes a rear stop surface with a forward stop direction for stop cooperation with the end band at the rear end to limit the backward movement of the crown spring. The fixing structure further includes a front sleeve disposed at the front end of the rear sleeve and located inside the rear sleeve. The end band at the front end of the crown spring is clamped between the front sleeve and the rear sleeve. The front end of the front sleeve is provided with an outward-turning edge for fixed cooperation with the rear sleeve, and the rear end surface of the outward-turning edge is in stop cooperation with the end band at the front end of the crown spring. During use, the end band at the front end of the crown spring is radially pressed against the inner wall of the rear sleeve by the front sleeve. Since the front sleeve restricts the end band at the front end of the crown spring, the deformation will be more concentrated at the corner structure, making the corner structure more prone to fracture. Summary of the Utility Model

[0005] One of the purposes of the utility model is to provide a jack assembly to solve the technical problem that the crown spring in the prior art is prone to fracture at the corner structure due to excessive stress or fatigue.

[0006] One of the purposes of the present utility model is to provide a rear sleeve of a jack assembly to solve the above technical problems.

[0007] One of the purposes of the present utility model is to provide a connector to solve the above technical problems.

[0008] To achieve the above purpose, the technical solution of the jack assembly provided by the present utility model is as follows:

[0009] A jack assembly includes a rear sleeve and a crown spring. An installation hole is provided at the front end of the rear sleeve. The crown spring is located in the installation hole. The crown spring includes two end bands whose outer peripheral walls are attached to the inner wall of the installation hole and a connecting strip connected between the two end bands. The middle part of the connecting strip is bent inward relative to the end bands. The two ends of the connecting strip have corner structures. An avoidance groove extending in the circumferential direction is provided on the inner wall of the installation hole. There is only one avoidance groove and it is correspondingly arranged outside one of the corner structures, or there are two avoidance grooves and they are respectively correspondingly arranged outside the two corner structures, so that when the connecting strip expands outward, the corner structure can extend into the corresponding avoidance groove.

[0010] As a further improvement, both the front and rear side walls of the avoidance groove are inclined walls or arc-shaped walls that gradually expand from the bottom of the avoidance groove to the notch.

[0011] As a further improvement, a fixing structure for fixing the front end band relative to the rear sleeve is provided between the front end of the rear sleeve and the front end band. The avoidance groove is provided at a position on the inner wall of the installation hole corresponding to the front corner structure.

[0012] As a further improvement, the fixing structure includes an inner sleeve. The inner sleeve includes an annular inner support body. The inner support body is located inside the front end band and is in interference fit with the installation hole by pressing the front end band. The rear end of the inner sleeve is located at the corner structure.

[0013] As a further improvement, the rear end wall of the inner sleeve is an arc-shaped wall.

[0014] As a further improvement, the fixing structure further includes a sheath. The sheath includes a cylindrical connecting portion and a stop portion that turns inward at the front end of the connecting portion. The connecting portion is sleeved outside the rear sleeve and is fixedly connected to the rear sleeve. The stop portion is located on the front side in the axial direction of the inner sleeve and is in axial stop cooperation with the inner sleeve.

[0015] The beneficial effects are as follows: The jacking component provided by the present utility model is an improvement over the prior art. An avoidance groove is provided on the inner wall of the mounting hole of the rear sleeve of the jacking component, and the avoidance groove corresponds to the angled structure on the crown spring. During use, the throat circle position of the crown spring is radially extruded by the pin and expands outward, that is, the middle part of the connecting strip expands outward. The connecting strip will drive the angled structure to extend into the avoidance groove. The position where the connecting strip is connected to the end strip can also deform, rather than only the angled structure deforming. After the deformation is dispersed, the deformation amount at the angled structure will decrease, improving the fatigue resistance of the angled structure. Thus, the angled structure is not easily broken during long-term use, improving the service life of the crown spring. After the deformation is dispersed, the stress at the angled structure can also be reduced, and the angled structure is not easily broken due to excessive stress, which is also beneficial to improving the service life of the crown spring.

[0016] To achieve the above object, the technical solution of the rear sleeve of the jacking component provided by the present utility model is:

[0017] The rear sleeve of the jacking component, the front end of the rear sleeve is provided with a mounting hole for mounting the crown spring, and an avoidance groove extending along the circumferential direction is provided on the inner wall of the mounting hole. There is only one avoidance groove and it is used to correspondingly arrange outside one of the angled structures of the crown spring, or there are two avoidance grooves and they are respectively used to correspondingly arrange outside the two angled structures of the crown spring, so that the angled structure can extend into the corresponding avoidance groove when the connecting strip of the crown spring expands outward.

[0018] As a further improvement, the front and rear side walls of the avoidance groove are both inclined walls or arc-shaped walls that gradually expand from the bottom of the avoidance groove to the notch.

[0019] The beneficial effects are as follows: The rear sleeve of the jacking component provided by the present utility model is an improvement over the prior art. An avoidance groove is provided on the inner wall of the mounting hole of the rear sleeve of the jacking component, and after assembly, the avoidance groove corresponds to the angled structure on the crown spring. During use, the throat circle position of the crown spring is radially extruded by the pin and expands outward, that is, the middle part of the connecting strip expands outward. The connecting strip will drive the angled structure to extend into the avoidance groove. The position where the connecting strip is connected to the end strip can also deform, rather than only the angled structure deforming. After the deformation is dispersed, the deformation amount at the angled structure will decrease, improving the fatigue resistance of the angled structure. Thus, the angled structure is not easily broken during long-term use, improving the service life of the crown spring. After the deformation is dispersed, the stress at the angled structure can also be reduced, and the angled structure is not easily broken due to excessive stress, which is also beneficial to improving the service life of the crown spring.

[0020] To achieve the above object, the technical solution of the connector provided by the present utility model is:

[0021] The connector includes a housing and a jack assembly disposed within the housing. The jack assembly includes a rear sleeve and a crown spring. An installation hole is provided at the front end of the rear sleeve, and the crown spring is located within the installation hole. The crown spring includes two end bands whose outer peripheral walls are in contact with the inner wall of the installation hole, and a connecting strip connected between the two end bands. The middle part of the connecting strip is bent inward relative to the end bands, and corner structures are provided at both ends of the connecting strip. An avoidance groove extending in the circumferential direction is provided on the inner wall of the installation hole. There is only one avoidance groove and it is correspondingly arranged outside one of the corner structures, or there are two avoidance grooves and they are respectively correspondingly arranged outside the two corner structures, so that when the connecting strip expands outward, the corner structure can extend into the corresponding avoidance groove.

[0022] As a further improvement, both the front and rear side walls of the avoidance groove are inclined walls or arc-shaped walls that gradually expand from the bottom of the avoidance groove to the notch.

[0023] As a further improvement, a fixing structure for fixing the front end band relative to the rear sleeve is provided between the front end of the rear sleeve and the front end band, and the above-mentioned avoidance groove is provided at a position on the inner wall of the installation hole corresponding to the front corner structure.

[0024] As a further improvement, the fixing structure includes an inner sleeve. The inner sleeve includes an annular inner support body. The inner support body is located inside the front end band and is in interference fit with the installation hole by squeezing the front end band. The rear end of the inner sleeve is located at the corner structure.

[0025] As a further improvement, the rear end wall of the inner sleeve is an arc-shaped wall.

[0026] As a further improvement, the fixing structure further includes a sheath. The sheath includes a cylindrical connecting portion and a stop portion that turns inward at the front end of the connecting portion. The connecting portion is sleeved outside the rear sleeve and is fixedly connected to the rear sleeve. The stop portion is located on the front side in the axial direction of the inner sleeve and is in axial stop fit with the inner sleeve.

[0027] The beneficial effects are as follows: The connector provided by the present utility model is an improvement over the prior art. An avoidance groove is provided on the inner wall of the installation hole of the rear sleeve in the connector, and the avoidance groove corresponds to the corner structure on the crown spring. During use, the throat circle position of the crown spring is radially squeezed by the pin and expands outward, that is, the middle part of the connecting strip expands outward. The connecting strip will drive the corner structure to extend into the avoidance groove, and the position where the connecting strip is connected to the end band can also deform, rather than only the corner structure deforming. After the deformation is dispersed, the deformation amount at the corner structure will be reduced, improving the fatigue resistance of the corner structure, so that the corner structure is not easily broken during long-term use, and the service life of the crown spring is improved. After the deformation is dispersed, the stress at the corner structure can also be reduced, and the corner structure is not easily broken due to excessive stress, which is also beneficial to improving the service life of the crown spring. Description of the Drawings

[0028] Figure 1 Cross-sectional view of the jack assembly in Embodiment 1 of the jack assembly in the present utility model;

[0029] Figure 2 Exploded view of the jack assembly in Embodiment 1 of the jack assembly in the present utility model;

[0030] Figure 3 Schematic diagram of the manufacturing process of the crown spring in Embodiment 1 of the jack assembly in the present utility model;

[0031] Figure 4 Schematic diagram of the structure of the crown spring in Embodiment 1 of the jack assembly in the present utility model;

[0032] Figure 5 Partial cross-sectional view of the jack assembly in Embodiment 1 of the jack assembly in the present utility model;

[0033] Figure 6 Cross-sectional view of the jack assembly in Embodiment 2 of the jack assembly in the present utility model;

[0034] Figure 7 Cross-sectional view of the jack assembly and the pin in Embodiment 6 of the jack assembly in the present utility model;

[0035] Figure 8 Partial cross-sectional view of the jack assembly and the pin in Embodiment 6 of the jack assembly in the present utility model;

[0036] Figure 9 Schematic diagram of the structure of the pin shaft in Embodiment 6 of the jack assembly in the present utility model;

[0037] Figure 10 Schematic diagram of the structure of the elastic member in Embodiment 6 of the jack assembly in the present utility model.

[0038] Explanation of reference numerals:

[0039] 1. Rear sleeve; 11. Installation hole; 12. Avoidance groove; 13. Assembly hole; 14. Embedding groove; 2. Crown spring; 21. End band; 22. Connecting strip; 23. Turned-out portion; 24. Arc transition portion; 25. Fold angle structure; 3. Inner sleeve; 31. Inner support body; 32. Transition pressing body; 33. End-side pressing body; 34. Embedding groove; 4. Sheath; 41. Connecting portion; 42. Stopping portion; 5. Pin; 51. Inner hole of the pin; 6. Pin shaft; 61. Limiting section; 62. Assembly section; 63. Installation section; 64. Elastic catch; 65. Limiting step; 66. Conical surface; 7. Elastic member; 71. Fixed section; 72. Contact section; 721. Spring piece; 722. Contact protrusion; 73. Flange; 74. Stopping wall; 75. Force-applying wall; 76. Matching step. Detailed implementation manners

[0040] The present invention is further described in detail below in conjunction with the embodiments.

[0041] In order to solve the technical problems in the prior art, the basic concept of the utility model is to set an avoidance groove on the inner wall of the mounting hole of the rear sleeve, and the avoidance groove corresponds to the angle structure on the crown spring. During use, the avoidance groove can allow the connecting strip near the angle structure to deform partially, thereby dispersing the stress and deformation at the angle structure, improving the fatigue resistance of the angle structure, and increasing the service life of the crown spring.

[0042] Specific embodiment 1 of the jack assembly provided by the utility model:

[0043] See attached Figure 1 and attached Figure 2 The jack assembly comprises a rear sleeve 1, a crown spring 2, an inner sleeve 3 and a protective sleeve 4.

[0044] The rear sleeve 1 is cylindrical in shape, with one axial end of the rear sleeve 1 being the front end and the other end being the rear end. The front end of the rear sleeve 1 is used for plugging with the pin. A mounting hole 11 is provided on the front end wall of the rear sleeve 1, and the crown spring 2 is mounted in the mounting hole 11.

[0045] See attached Figure 3 and attached Figure 4 The crown spring 2 is made of a metal sheet, and the specific processing process is: first, a plurality of slit-shaped long holes are punched out on the metal sheet, so that end bands 21 are formed at both ends of the metal sheet in the width direction, and a connecting strip 22 connected to the two end bands 21 is formed in the middle, and a tooth-like structure is punched out on one of the end bands 21; then, the tooth-like structure is vertically bent to one side, and then the metal sheet is curled into a cylindrical shape with the original width direction as the axial direction, and the tooth-like structure faces the outside of the cylinder. In order to ensure the radial deformation ability of the crown spring 2, the two ends of the metal sheet in the length direction are curled and close to each other but not fixedly connected; finally, the cylinder is waisted so that the connecting strip 22 in the middle of the cylinder is concave inward to form a throat round structure, so that elastic contact can be formed after the pin is inserted, and the processing of the crown spring 2 is completed.

[0046] After the crown spring 2 is formed, the end band 21 and the connecting strip 22 are the main body, the toothed structure folded outward is the outward turning part 23, and an arc-shaped transition part 24 is formed between the outward turning part 23 and the corresponding end band 21. When the waist is narrowed, the middle position of the connecting strip 22 is concave inward, so that the two ends of the connecting strip 22 form a folded corner structure 25. After assembly, the main body of the crown spring 2 is located in the mounting hole 11, and the outer peripheral wall of the end band 21 is in contact with the inner wall of the mounting hole 11, and the outward turning part 23 is located outside the mounting hole 11 and buckled on the end wall of the plug-in end. An arc-shaped transition arc contact wall is provided between the inner wall of the mounting hole 11 and the end wall of the plug-in end, and the shape of the arc-shaped transition part 24 is adapted to the shape of the arc-shaped contact wall.

[0047] A fixing structure is provided between the front end of the rear sleeve 1 and the end band 21 at the front end of the crown spring 2 for fixing the end band 21 at the front end of the crown spring 2 relative to the rear sleeve 1. Refer to the appendix Figure 1 and the appendix Figure 5 The fixing structure includes an inner sleeve 3 that is integrally annular. The inner sleeve 3 includes an inner support body 31, a transition pressing body 32, and an end-side pressing body 33 that are integrally formed. In other embodiments, it can also be separately manufactured and then fixed together by welding. The inner hole of the inner support body 31 forms an insertion hole for the insertion pin to pass through. One end wall in the axial direction of the end-side pressing body 33 is an end-side pressing wall that abuts against and presses the outward-turning portion 23. The outer diameter of the inner support body 31 is smaller than the outer diameter of the end-side pressing body 33, that is, the inner support body 31 is connected to the inner side of the end-side pressing body 33. The outer peripheral wall of the inner support body 31 is a circular tube surface structure, and there is an arc transition between the outer peripheral wall of the inner support body 31 and the end-side pressing wall. The arc-transition part constitutes the transition pressing body 32.

[0048] After the crown spring 2 is inserted into the mounting hole 11, one end of the inner support body 31 away from the end-side pressing body 33 is inserted into the inner side of the crown spring 2. After the inner support body 31 is installed in place, the transition pressing body 32 reaches the position of the arc-transition part 24, and the end-side pressing wall on the end-side pressing body 33 reaches the side of the outward-turning portion 23 of the crown spring 2 axially away from the mating end. The arc contact wall, the arc-transition part 24, and the transition pressing body 32 are provided to ensure sufficient contact between the elastic body and the rear sleeve 1 and prevent stress concentration caused by sharp corners. In other embodiments, the arc contact wall, the arc-transition part 24, and the transition pressing body 32 may not be provided. In this embodiment, the inner wall of the rear sleeve 1 and the mating end are transitioned at a right angle, and the outward-turning portion 23 and the main body portion, as well as the end-side pressing wall and the outer wall of the inner support body 31, are also transitioned at a right angle.

[0049] The difference between the inner diameter of the mounting hole 11 and the outer diameter of the inner support body 31 is less than twice the radial thickness of the end band 21. The inner support body 31 constitutes an inner pressing body for press-fitting with the main body portion so as to press the main body portion radially against the inner wall of the mounting hole 11. After the inner support body 31 is installed, on the one hand, it can make the main body portion of the crown spring 2 closely adhere to the inner wall of the mounting hole 11, and on the other hand, through the interference fit between the inner support body 31 and the crown spring 2, and between the crown spring 2 and the rear sleeve 1, the inner support body 31 is fixed relative to the rear sleeve 1.

[0050] After the inner support body 31 is assembled in place, it can provide a pressing force to the transition pressing body 32 and the end side pressing body 33, so that the end side pressing wall of the end side pressing body 33 presses the outward-turned portion 23 of the crown spring 2 against the end wall of the plug-in end of the rear sleeve 1 in the axial direction, and at the same time, the outer wall of the transition pressing body 32 presses the arcuate transition portion 24 against the arcuate contact wall, and can maintain a pressing force between the outward-turned portion 23 and the plug-in end of the rear sleeve 1, and between the arcuate transition portion 24 and the arcuate contact wall, so the inner support body 31 also constitutes a fixed structure. In order to ensure that there is sufficient friction between the inner support body 31, the crown spring 2 and the rear sleeve 1, it is necessary to make the inner support body 31 have a sufficient axial length. In this embodiment, the axial length of the inner support body 31 is equal to the axial length of the corresponding end band 21. In other embodiments, the axial length of the inner support body 31 can also be greater than the axial length of the corresponding end band 21.

[0051] There is a large contact area between the crown spring 2 and the rear sleeve 1, and they can maintain good contact under the action of the pressing force, so that there is a good flow capacity between the crown spring 2 and the rear sleeve 1. In addition, the interference fit between the inner support body 31 and the crown spring 2, and between the crown spring 2 and the rear sleeve 1, also keeps the crown spring 2 fixed relative to the rear sleeve 1, thereby preventing the crown spring 2 from being worn due to the axial reciprocating movement in the mounting hole 11. During the assembly of the inner support body 31, the outward turning portion 23 on the crown spring 2 can also play a limiting role, preventing the crown spring 2 from being pushed by the inner support body 31 to move into the mounting hole 11.

[0052] During the assembly process, when the inner support body 31 is inserted into the crown spring 2, the inner support body 31 can open the corresponding end band 21, so that the corresponding end band 21 of the crown spring 2 is in a perfect circular structure, ensuring that the outward-turned portion 23 of the crown spring 2 can be radially moved to the end wall of the plug-in end of the rear sleeve 1, and after the end side pressing body 33 is in place, the outward-turned portion 23 can be pressed against the end wall of the plug-in end to ensure sufficient contact area between the crown spring 2 and the rear sleeve 1. The inner support body 31 can open the end band 21 of the crown spring 2, and can also affect the middle part of the crown spring 2, and also play a role in correcting the shape of the middle part of the crown spring 2, thereby improving the roundness of the throat circle of the middle part of the crown spring 2 and improving the contact and conductive effect with the pin.

[0053] The end band 21 at the rear end of the crown spring 2 extends into the mounting hole 11 and has an axial gap with the bottom wall of the mounting hole 11 to ensure that the end of the crown spring 2 can be deformed in the axial direction when radially squeezed by the pin, thereby preventing the crown spring 2 from being damaged by excessive squeezing force.

[0054] The fixed structure also includes a sheath 4, see attached Figure 1 and attached Figure 5The sleeve 4 includes a cylindrical connecting portion 41 and a stop portion 42 located at one axial end of the connecting portion 41, and the stop portion 42 is folded inwardly relative to the connecting portion 41. During assembly, the plug-in end is inserted into the connecting portion 41 from the end of the connecting portion 41 away from the stop portion 42, and after being inserted into place, the connecting portion 41 and the rear sleeve 1 are fixed together by crimping. In other embodiments, the connecting portion 41 can also be fixedly connected to the sleeve 4 by welding or threaded connection. After the sleeve 4 is assembled, the stop portion 42 is located on the side of the end side clamping body 33 of the inner sleeve 3 away from the plug-in end and cooperates with the end side clamping body 33 along the axial stop to prevent the inner sleeve 3 from loosening. The sleeve 4 in this embodiment also constitutes a fixed structure.

[0055] A side of the end side pressing body 33 away from the outer turning portion 23 is provided with an embedding groove 34 for the stopper 42 to be embedded in, and a side wall of the end side pressing body 33 away from the outer turning portion 23 is aligned with a side wall of the stopper 42 away from the outer turning portion 23 to ensure aesthetics and prevent the appearance of a sharp point. In other implementations of this embodiment, the embedding groove 34 may not be provided on the end side pressing body 33.

[0056] An annular avoidance groove 12 is provided on the inner wall of the mounting hole 11, and the position of the avoidance groove 12 corresponds to the position of the front angle structure 25 on the crown spring 2, that is, the angle structure 25 is located between the front and rear side walls of the avoidance groove 12, so that the angle structure 25 can extend into the avoidance groove 12 when the connecting strip 22 expands outward. The front and rear side walls of the avoidance groove 12 are both inclined walls that gradually expand outward from the bottom to the mouth of the avoidance groove 12. In other embodiments, the front and rear side walls of the avoidance groove 12 are both arc-shaped walls that gradually expand outward from the bottom to the mouth of the avoidance groove 12 to prevent the mouth of the avoidance groove 12 from having sharp corners and damaging the crown spring 2. Of course, in other embodiments, the front and rear side walls of the avoidance groove 12 can also be straight walls perpendicular to the axis of the rear sleeve 1.

[0057] The rear end wall of the inner sleeve 3 is an arc-shaped wall that smoothly transitions with the inner wall and the outer wall of the inner sleeve 3, and the rear end wall of the inner sleeve 3 is located at the angle structure 25 in front of the crown spring 2, that is, the rear end wall of the inner sleeve 3 is located between the front and rear side walls of the avoidance groove 12. The arc-shaped wall can prevent the appearance of a sharp point and can also avoid damaging the crown spring 2. In other embodiments, the rear end wall of the inner sleeve 3 can also be a straight wall perpendicular to the axis of the inner sleeve 3.

[0058] During use, the jack is inserted into the inner side of the crown spring 2, and the pin generates a radially outward extrusion force on the throat circle position of the crown spring 2, forcing the connecting strip 22 of the crown spring 2 to expand outward. Since the front corner structure 25 is located at the avoidance groove 12, during the outward expansion of the connecting strip 22, the corner structure 25 can extend into the avoidance groove 12 to release stress. Specifically, the part where the front end of the connecting strip 22 is connected to the front end band 21 (i.e., the part of the connecting strip 22 between the front corner structure 25 and the front end band 21) is also more likely to deform. After deformation at this place, the deformation amount at the corner structure 25 can be reduced, and the stress is dispersed forward, avoiding large stress concentration at the corner structure 25.

[0059] After setting the avoidance groove 12, the deformation amount and stress of the corresponding corner structure 25 can be reduced each time during use, thereby improving the anti-fatigue ability of the corner structure 25 and extending the service life of the crown spring 2.

[0060] Specific embodiment 2 of the jack assembly provided by the present utility model:

[0061] This embodiment is based on embodiment 1. The difference from embodiment 1 is that, referring to the attached Figure 6 In this embodiment, two avoidance grooves 12 are provided on the inner wall of the mounting hole 11. One avoidance groove 12 is located at the front corner structure 25, and the other avoidance groove 12 is arranged at the rear and is located at the rear corner structure 25.

[0062] Specific embodiment 3 of the jack assembly provided by the present utility model:

[0063] This embodiment is based on embodiment 1. The difference from embodiment 1 is that in this embodiment, no fixing structure is provided between the front end of the rear sleeve and the front end band. At the same time, the crown spring does not have a folding part. In this embodiment, an inwardly protruding flange is provided at the front port of the mounting hole to circumferentially limit the crown spring inserted into the mounting hole to prevent the crown spring from protruding forward. Two annular avoidance grooves are provided in the mounting hole of this embodiment, and the positions of the avoidance grooves correspond to the positions of the two corner structures on the crown spring respectively.

[0064] In other embodiments of this embodiment, only one avoidance groove can also be provided in the mounting hole, and the avoidance groove corresponds to one of the two corner structures.

[0065] Specific embodiment 4 of the jack assembly provided by the present utility model:

[0066] This embodiment is based on embodiment 1. The difference from embodiment 1 is that in this embodiment, no sheath is provided, and the inner sleeve is fixed only by the interference fit between it and the crown spring, and between the crown spring and the rear sleeve.

[0067] In other embodiments of this embodiment, the crown spring may not be provided with a folding portion.

[0068] Specific embodiment 5 of the jack assembly provided by the present utility model:

[0069] This embodiment is based on Embodiment 1. The difference from Embodiment 1 is that in this embodiment, the sheath and the inner sleeve are not provided, and at the same time, the outer turning portion is not provided on the crown spring. The front end band on the crown spring in this embodiment is fixed to the outer sleeve by welding.

[0070] Specific embodiment 6 of the jack assembly provided by the present utility model:

[0071] This embodiment is based on Embodiment 1. The difference from Embodiment 1 is that, referring to Appendix Figure 7 and Appendix Figure 8 , a pin shaft 6 is coaxially arranged in the mounting hole 11. The pin 5 is used to be inserted into the mounting hole 11. An inner hole 51 of the pin is provided at the axial end of the pin 5, and the inner hole 51 of the pin is for the pin shaft 6 to be inserted into, and the inner hole 51 of the pin has an equal-diameter structure.

[0072] An elastic member 7 is provided between the pin shaft 6 and the hole wall of the inner hole 51 of the pin to conduct the pin 5, the pin shaft 6, and the rear sleeve 1 after the pin 5 is inserted into the rear sleeve 1. The elastic member 7 can be provided on the pin shaft 6 or inside the pin 5. In this embodiment, the elastic member 7 is located on the pin shaft 6.

[0073] Referring to Appendix Figure 9 , the pin shaft 6 includes a limiting section 61, an assembly section 62, and an installation section 63, wherein the assembly section 62 is located between the limiting section 61 and the installation section 63. A mounting hole 13 axially penetrating the rear sleeve 1 is opened at the center of the bottom wall of the mounting hole 11. The installation section 63 is located in the mounting hole 13 and forms an interference fit region with the inner wall of the mounting hole 13. The interference fitting of the pin shaft 6 and the mounting hole 13 is to ensure better centering of the pin shaft 6, the elastic member 7, and the inner hole 51 of the pin. An elastic hook 64 is provided at the end of the installation section 63. A stepped structure is provided at one end of the mounting hole 13 away from the mounting hole 11, and the stepped surface of the stepped structure constitutes a mating wall that axially stops and cooperates with the elastic hook 64. The elastic hook 64 and the mating wall constitute an anti-withdrawal structure, and the anti-withdrawal structure can be used for axial limiting of the pin shaft 6 to prevent the pin shaft 6 from being withdrawn from the mouth of the mounting hole 11.

[0074] Referring to Appendix Figure 8 and in combination with Appendix Figure 10, the elastic member 7 is sleeved on the pin shaft 6. The elastic member 7 includes an axially connected fixed section 71 and a contact section 72. The fixed section 71 is annular. The contact section 72 includes a plurality of spring pieces 721 evenly distributed in the circumferential direction. The length direction of the spring piece 721 is the same as the axis of the elastic member 7. One end of the spring piece 721 is connected to the fixed section 71, and the other end of the spring piece 721 is suspended. A contact protrusion 722 is arranged on the outer side of the end of the spring piece 721 far from the fixed section 71, and a guiding inclined surface or a guiding arc surface is arranged on the contact protrusion 722. Arranging the contact protrusion 722 can increase the deformation amount of the spring piece 721 when it is pressed, and improve the resilience of the spring piece 721. The contact protrusion 722 can be a wedge-shaped structure or a hemispherical structure.

[0075] An embedding groove 14 for installing the elastic member 7 is formed on the bottom wall of the installation hole 11. The fixed section 71 of the elastic member 7 is embedded into the embedding groove 14, and the contact section 72 of the elastic member 7 is located outside the embedding groove 14. The outer wall of the fixed section 71 of the elastic member 7 is in interference fit with the inner wall of the embedding groove 14, so that the elastic member 7 is fixedly connected to the rear sleeve 1 and good electrical conduction is achieved. In this embodiment, the interference fit structure between the elastic member 7 and the embedding groove 14 constitutes the fixed connection structure between the elastic member 7 and the rear sleeve 1. A radially outwardly protruding annular flange 73 is arranged on the outer side of the elastic member 7. The flange 73 is located between the fixed section 71 and the contact section 72. The two side walls of the flange 73 in the axial direction respectively constitute a stop wall 74 for being in abutting and stopping fit with the bottom wall of the installation hole 11, and a force application wall 75 for providing a force application position for the forced installation tool when the fixed section is installed into the embedding groove 14. During the installation process of the elastic member 7, it is necessary to install the elastic member 7 from the installation hole 11 and align the fixed section 71 of the elastic member 7 with the embedding groove 14, and then use a tubular forced installation tool to abut against the force application wall 75 of the flange 73. After the forced installation tool applies force to the flange 73, the fixed section 71 of the elastic member 7 is installed into the embedding groove 14. After the stop wall 74 of the flange 73 is in abutting and stopping fit with the bottom wall of the installation hole 11, the fixed section 71 is installed in place. At this time, the stop wall 74 is in close contact with the bottom wall of the installation hole 11, thereby increasing the contact area between the elastic member 7 and the rear sleeve 1 and improving the current-carrying capacity.

[0076] The assembly section 62 is provided with a limit step 65, and the step surface of the limit step 65 faces away from the limit section 61. A mating step 76 for mating with the limit step 65 is provided on the elastic member 7, and the limit step 65 and the mating step 76 are axially abutted and mated. The areas of the pin shaft 6 corresponding to the elastic member 7 are all the assembly section 62, and the assembly section 62 and the elastic member 7 are in clearance fit or transition fit in the radial direction for easy assembly. When assembling the contact components, first install the elastic member 7 on the rear sleeve 1, and then install the pin shaft 6. During the installation process of the pin shaft 6, the elastic hook 64 contracts inward. After the pin shaft 6 is installed in place, the elastic hook 64 pops out outward and mates with the mating wall. At the same time, the limit step 65 and the mating step 76 also form a fit to form limits in both directions along the axis of the pin shaft 6, ensuring the installation reliability of the pin shaft 6. After the pin shaft 6 is installed in place, due to the fit between the limit step 65 and the mating step 76, the elastic member 7 is also limited axially, improving the stability of the elastic member 7.

[0077] A deformation space for the elastic member 7 to deform after being compressed is provided at the assembly section 62. The deformation space is specifically a deformation groove, and the position of the deformation groove corresponds to the contact section 72 of the elastic member 7. In this embodiment, a conical surface 66 is provided at the position of the assembly section 62 corresponding to the contact section 72 of the elastic member 7. The small-diameter end of the conical surface 66 is located at the connection between the reed piece 721 and the fixed section 71, and the large-diameter end of the conical surface 66 corresponds to the end of the reed piece 721 away from the fixed section 71. A step structure is formed between the conical surface 66 and the limit section 61, and the area surrounded by the conical surface 66 and the step surface of the step structure constitutes the deformation groove. The conical surface 66 can make the cross-sectional dimension of the assembly section 62 change smoothly, preventing stress concentration on the reed piece 721.

[0078] The pin 5 includes a limit mating section and a contact mating section. After the contact component and the mating component are inserted into each other, the position of the limit mating section corresponds to that of the limit section 61, and the outer diameter of the limit section 61 is adapted to the inner diameter of the limit mating section to prevent relative yaw between the pin shaft 6 and the pin 5. The above-mentioned adaptation means that the outer diameter of the limit section 61 is equal to the inner diameter of the limit mating section, so that the limit section 61 can just be inserted into the limit mating section. At this time, the outer wall of the limit section 61 is attached to the inner wall of the limit mating section, and relative yaw between the pin shaft 6 and the pin 5 cannot occur; the adaptation can also mean that the outer diameter of the limit section 61 is slightly smaller than the limit mating section, so that the limit section 61 and the limit mating section are in clearance fit, facilitating the insertion of the mating component and the contact component. However, when relative yaw between the pin shaft 6 and the pin 5 is about to occur, both axial ends of the limit section 61 can obtain rigid support from the inner wall of the limit mating section, rather than the elastic support of the elastic member 7 in the prior art. Therefore, relative yaw between the pin shaft 6 and the pin 5 can also be prevented.

[0079] After the insertion components and the contact components are inserted into each other, the inner wall of the contact and mating section presses against the outer side of the contact protrusion 722 on the reed 721, forcing the reed 721 to bend inward and deform, so as to maintain sufficient pressing force between the reed 721 and the inner wall of the contact and mating section, ensuring good electrical conduction. In this embodiment, only the end position of the reed 721 of the elastic member 7 extends into the inner hole 51 of the pin and contacts a smaller area at the end of the pin 5, which can make the contact and mating section shorter, so that the limit and mating section can be longer, and correspondingly, the limit section 61 can be longer, thereby enhancing the effect of preventing the pin shaft 6 and the pin 5 from relatively swinging.

[0080] Since the inner hole 51 of the pin is of a constant diameter structure, when the insertion starts, that is, when the limit section 61 just enters the inner hole 51 of the pin, the limit section 61 can form a guiding fit with the inner hole 51 of the pin to ensure smooth insertion. Chamfers or rounded corners are provided at the axial end positions of the pin shaft 6 and on the inner and outer sides of the axial end of the pin 5 to ensure smooth insertion.

[0081] In the above embodiment, the assembly hole is processed into a through hole to facilitate the processing of the mating wall. In other embodiments, the assembly hole can also be processed into a blind hole. In this embodiment, a ring groove is processed on the inner wall of the installation hole, and the axial side wall of the ring groove can be used as the mating wall to cooperate with the elastic hook.

[0082] In the above embodiment, the elastic hook can improve the convenience of pin shaft installation. In other embodiments, the elastic hook can also be not provided. The anti-retreat structure in this embodiment includes a nut installed at the end of the installation section. After the pin shaft is inserted into the installation hole, the nut is installed, and the nut forms a blocking fit with the mating wall to achieve the anti-retreat of the pin shaft. In other embodiments, the end of the installation section can also pass through the installation hole and be welded to the jacking member, and the welding structure constitutes the leg structure.

[0083] In the case of setting the anti-retreat structure, the limit step, and the mating step, the pin shaft and the assembly hole can also be in clearance fit. In the case of interference fit between the pin shaft and the assembly hole, the anti-retreat structure can also be not provided.

[0084] In the above embodiment, by using the cooperation of the limit step and the mating step, the elastic member can be limited by the pin shaft, improving the stability of the elastic member and preventing the elastic member from loosening due to vibration. In an environment with less vibration, the elastic member can also not be limited by the pin shaft.

[0085] In the above embodiment, the assembly section and the elastic member are in clearance or transition fit to ensure the convenience of assembly. In other embodiments, the assembly section and the elastic member can also be in interference fit.

[0086] In other embodiments, contact protrusions may not be provided on the reed. In this embodiment, the inner wall of the inner hole of the pin directly presses against the outer wall of the reed.

[0087] In the above embodiments, at least two reeds in the contact section need to be provided. The reeds are relatively easy to deform and have good elasticity to ensure better contact between the elastic member and the pin member after insertion. In other embodiments, the contact section may also be a drum-shaped spring washer ring fixedly connected to the fixed section. The middle of the drum-shaped spring washer ring bulges outwards to cooperate with the inner wall of the contact and cooperation section. The drum-shaped spring washer ring is a prior art and will not be elaborated here. In this embodiment, an avoidance groove for cooperating with the drum-shaped spring washer ring is provided on the inner wall of the contact and cooperation section to prevent the drum-shaped spring washer ring from being damaged due to excessive pressure.

[0088] In the above embodiments, providing a convex edge can facilitate the assembly of the elastic member and can also increase the contact area between the elastic member and the jack member. In other embodiments, the convex edge may not be provided, and only a stepped structure is provided on the outer wall of the elastic member to install the elastic member. Or in other embodiments, the elastic member is connected to the bottom wall of the jack by welding, and there is no need to provide a convex edge anymore. In this embodiment, the welding structure between the elastic member and the bottom wall of the jack constitutes a fixed connection structure.

[0089] In the above embodiments, setting the fixed connection structure between the jack member and the elastic member can improve the connection strength between the elastic member and the pin member, ensure better contact between the elastic member and the pin member, and ensure the current-carrying capacity. In other embodiments, the fixed connection structure can also be provided between the elastic member and the pin shaft, for example, making the elastic member and the pin shaft in interference fit or welding. In this embodiment, the current flow path is from the elastic member to the pin shaft and then to the jack member.

[0090] In the above embodiments, providing a fitting groove for embedding the elastic member on the jack member can increase the contact area between the elastic member and the jack member. In other embodiments, the fitting groove may not be provided. In this embodiment, a radially outward flanging can be provided at one axial end of the elastic member, and the flanging is fitted to the bottom wall of the jack to increase the contact area.

[0091] In the above embodiments, the fixed section of the elastic member can more conveniently fix the elastic member to the pin shaft or the jack member. In other embodiments, the elastic member can also be connected to the pin shaft or the jack member in a non-fixed manner. In this embodiment, the elastic member may only include a contact section, and the elastic member may specifically be a drum-shaped spring washer ring or an elastic contact finger. In this embodiment, the elastic member is directly installed in the deformation groove. An avoidance groove for cooperating with the drum-shaped spring washer ring or the elastic contact finger is provided on the inner wall of the contact and cooperation section to prevent the drum-shaped spring washer ring from being damaged due to excessive pressure.

[0092] In the above embodiments, the limiting section is arranged at the end of the pin shaft, so that the limiting section can be set longer, improving the effect of preventing the deviation between the pin preventing member and the pin shaft. In other embodiments, the assembly section and the limiting section can be interchanged. In this embodiment, a deformation groove is formed in the assembly section, and the elastic member is a drum-shaped spring washer arranged in the deformation groove. In this embodiment, the contact matching section and the limiting matching section are also interchanged accordingly. A relief groove for cooperating with the drum-shaped spring washer is formed in the inner wall of the contact matching section to prevent the drum-shaped spring washer from being damaged due to excessive compression.

[0093] In the above embodiments, the deformation groove is formed in the form of a conical surface, which can avoid stress concentration of the reed. In other embodiments, the deformation groove can also be an annular groove with a constant cross-section, and the deformation groove in this embodiment can also allow the reed to be compressed and deformed.

[0094] In other embodiments, the pin shaft can be a stepped shaft, and the outer diameter of the assembly section is smaller than that of the limiting section, so that a shoulder structure is formed between the assembly section and the limiting section. The space between the shoulder structure and the assembly section constitutes a deformation space. In this embodiment, in order to enable the contact section of the elastic member to deform radially, it is necessary to expand the contact section. The outer peripheral surface of the contact section is basically aligned with the outer peripheral surface of the limiting section, and an annular space for the contact section to deform is left between the inner peripheral surface of the contact section and the assembly section.

[0095] Specific embodiments of the rear sleeve of the jack assembly provided by the present utility model:

[0096] The rear sleeve of this jack assembly is the rear sleeve in any one of the specific embodiments 1-6 of the above jack assembly, which will not be elaborated here.

[0097] Specific embodiments of the connector provided by the present utility model:

[0098] This connector includes a housing and a jack assembly arranged in the housing. The jack assembly is the jack assembly in any one of the specific embodiments 1-6 of the above jack assembly, which will not be elaborated here.

[0099] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative efforts, or make equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A jack assembly, comprising a rear sleeve (1) and a crown spring (2), wherein the rear sleeve (1) is provided with a mounting hole (11) at its front end, the crown spring (2) is located in the mounting hole (11), the crown spring (2) comprises two end bands (21) whose outer peripheral walls are in contact with the inner wall of the mounting hole (11) and a connecting strip (22) connected between the two end bands (21), the middle portion of the connecting strip (22) is bent inwardly relative to the end bands (21), and the two ends of the connecting strip (22) have angle structures (25), wherein: An avoidance groove (12) extending in a circumferential direction is provided on the inner wall of the mounting hole (11); only one avoidance groove (12) is provided and is arranged correspondingly on the outside of one of the angle structures (25); or two avoidance grooves (12) are provided and are arranged correspondingly on the outsides of two angle structures (25), so that when the connecting strip (22) expands outward, the angle structure (25) can extend into the corresponding avoidance groove (12).

2. The jack assembly according to claim 1, characterized in that: The front and rear side walls of the avoidance groove (12) are both inclined walls or arc-shaped walls that gradually expand outward from the groove bottom to the groove opening of the avoidance groove (12).

3. The jack assembly according to claim 1 or 2, characterized in that: A fixing structure for fixing the front end band (21) relative to the rear sleeve (1) is provided between the front end of the rear sleeve (1) and the front end band (21), and the avoidance groove (12) is provided at a position corresponding to the front angle structure (25) on the inner wall of the mounting hole (11).

4. The jack assembly according to claim 3, characterized in that: The fixing structure comprises an inner sleeve (3), the inner sleeve (3) comprises an annular inner support body (31), the inner support body (31) is located inside the front end band (21) and is interference-fitted with the mounting hole (11) by squeezing the front end band (21), and the rear end of the inner sleeve (3) is located at the angle structure (25).

5. The jack assembly according to claim 4, characterized in that: The rear end wall of the inner sleeve (3) is an arc-shaped wall.

6. The jack assembly according to claim 3, characterized in that: The fixing structure also includes a protective sleeve (4), the protective sleeve (4) including a cylindrical connecting portion (41) and a stopper portion (42) located at the front end of the connecting portion (41) and folded inwardly, the connecting portion (41) is sleeved outside the rear sleeve (1) and is fixedly connected to the rear sleeve (1), and the stopper portion (42) is located at the axial front side of the inner sleeve (3) and cooperates with the inner sleeve (3) to axially stop.

7. A rear sleeve of a jack assembly, wherein the front end of the rear sleeve (1) is provided with a mounting hole (11) for mounting a crown spring (2), wherein: An avoidance groove (12) extending in a circumferential direction is provided on the inner wall of the mounting hole (11); the avoidance groove (12) is provided with only one and is used to be arranged correspondingly on the outer side of one of the angle structures (25) of the crown spring (2); or the avoidance groove (12) is provided with two and is used to be arranged correspondingly on the outer sides of two angle structures (25) of the crown spring (2), so that when the connecting strip (22) of the crown spring (2) expands outward, the angle structure (25) can extend into the corresponding avoidance groove (12).

8. The rear cover of the jack assembly according to claim 7, characterized in that: The front and rear side walls of the avoidance groove (12) are both inclined walls or arc-shaped walls that gradually expand outward from the groove bottom to the groove opening of the avoidance groove (12).

9. A connector comprising a housing and a jack assembly disposed in the housing, characterized in that: The jack assembly is the jack assembly described in any one of claims 1-6.

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