Pin fixing structure

Abstract

The utility model discloses a pin fixing structure, which is characterized in that an inner convex stopper capable of elastically deforming along the radial direction of a plug hole is arranged in the plug hole at the inner side of an insulating body, the diameter of a mounting seat at one end of a pin terminal is larger than that of a conductive pin at the other end, and a conical outer convex baffle ring of which the outer diameter of one end is larger than that of the other end is arranged on the outer side wall of the conductive pin of the pin terminal; the conductive contact pin of the contact pin terminal is inserted into the plugging hole of the insulating body, the inner convex stopper in the plugging hole is stopped on the end face of the end, with the large diameter, of the conical outer convex baffle ring of the contact pin terminal, and the mounting seat of the contact pin terminal is stopped on the end face of one end of the insulating body. A first rotation-stopping plugging structure eccentrically arranged at one end of the insulating body and a second rotation-stopping plugging structure eccentrically arranged on the mounting seat of the pin terminal are plugged in each other, so that the pin terminal and the insulating body are locked and positioned in the circumferential direction, the structure is simple, the structures of the insulating body and the pin terminal are simplified, the production cost is reduced, and the production efficiency is improved. And the assembly efficiency and the connection stability are improved.

Description

Technical Field

[0001] The utility model relates to a connector, in particular to a pin fixing structure. Background Art

[0002] The pin end of a pin-type connector is assembled together by an insulating body and a pin terminal, and a ring-shaped socket is formed between the pin terminal and the insulating body for the jack end of the connector to be inserted. Currently, when the pin terminal of the pin end of this type of connector is assembled with the insulating body, it is necessary to form a complex multi-step hole in the insulating body, and the pin terminal also needs to form a complex multi-step to cooperate and achieve plug-in positioning. On the one hand, this structure leads to a complex structure of the pin terminal of the insulating body, high manufacturing cost, large connector length, and it is difficult to avoid the pin terminal and the insulating body from rotating or shaking at a small relative angle. Utility Model Content

[0003] In order to make up for the above deficiencies, the utility model provides a pin fixing structure, which has a simple overall structure, low manufacturing cost, and stable positioning of the pin terminal.

[0004] The utility model adopts a technical solution to solve its technical problems: a pin fixing structure, comprising an insulating body and a pin terminal, the insulating body having an inserting hole formed on the inner side thereof, an inner convex stopper capable of elastically deforming in its radial direction, one end of the pin terminal being a mounting seat, and the other end of the pin terminal being a conductive pin having a diameter smaller than that of the mounting seat, a tapered outer convex stopper ring with an outer diameter at one end being larger than that of the other end being provided on the outer wall of the conductive pin, the conductive pin of the pin terminal being capable of being inserted into the inserting hole of the insulating body from one end toward the other end, and the inner convex stopper in the inserting hole being stopped by an end surface of the tapered outer convex stopper ring at an end with a larger diameter of the pin terminal, the mounting seat at one end of the pin terminal being stopped by an end surface of one end of the insulating body, an eccentric first anti-rotation plug-in structure being provided on one end of the insulating body, and an eccentric second anti-rotation plug-in structure being provided on the mounting seat of the pin terminal, the first anti-rotation plug-in structure and the second anti-rotation plug-in structure being inserted into each other so that the pin terminal and the insulating body are stopped and positioned in a circumferential direction.

[0005] As a further improvement of the present invention, the plug-in hole on the inside of the insulating body is a stepped hole with an inner diameter at one end smaller than the inner diameter at the other end. The inwardly convex stopper includes a plurality of cantilever structures arranged on the stepped surface between the two ends of the plug-in hole. The cantilever structure extends a set distance toward the other end of the plug-in hole, and the end of the cantilever structure forms a card point protruding toward the center line of the plug-in hole. When the conductive pin of the pin terminal is inserted, the conical convex retaining ring on the conductive pin can force the cantilever structure to swing elastically to avoid it. When the conical convex retaining ring on the conductive pin passes over the free end of the cantilever structure, the card point at the free end of the cantilever structure is elastically reset with the cantilever structure and stopped on the end surface of the conical convex retaining ring of the pin terminal with a larger diameter.

[0006] As a further improvement of the present invention, a positioning column is further provided between the conductive pin and the mounting seat. The positioning column is directly between the conductive pin and the mounting seat, and the positioning column is inserted into the end with a smaller diameter of the plug-in hole. The positioning column and the conductive pin are connected by a chamfered bevel transition. The card point on the free end of the cantilever structure can be accommodated in the annular gap formed between the conical outer convex retaining ring and the positioning column, and one end of the card point contacts the chamfered bevel between the positioning column and the conductive pin through the bevel, and the other end of the card point contacts the end face of the conical outer convex retaining ring through the plane.

[0007] As a further improvement of the present invention, at least one circle of circular interference ribs is provided on the outer circumferential surface of the positioning column of the pin terminal, and the interference ribs are interference-fitted with the inner side surface of the end with the smaller diameter of the plug hole.

[0008] As a further improvement of the present invention, two circles of interference ribs are provided on the outer circumferential surface of the positioning column, and the two circles of interference ribs are respectively located on the outer circumferential surfaces of the two axial ends of the positioning column.

[0009] As a further improvement of the present invention, the first anti-rotation plug-in structure is a boss provided on one end of the insulating body, and the second anti-rotation plug-in structure is a groove provided on the end surface of the mounting seat, and the bosses are inserted into the grooves in a one-to-one correspondence.

[0010] As a further improvement of the present invention, the boss is a long strip boss symmetrically arranged on both sides of one end of the insulating body, and the groove is a notch symmetrically arranged on the end surface of the mounting seat.

[0011] As a further improvement of the present invention, the inner edge of the opening end of the groove and the outer edge of the boss are both provided with chamfered structures.

[0012] As a further improvement of the present invention, a sleeve is fixedly provided on the outer side of one end of the insulating body, and a ring-shaped mounting groove is formed between the sleeve and the outer side wall of one end of the insulating body. The inner side wall of the bottom of the mounting groove and the outer side wall of one end of the insulating body are connected by a number of radially extending fixing ribs.

[0013] The beneficial technical effects of the present invention are as follows: the present invention realizes axial limitation by contacting the end face of one end of the insulating body with the mounting seat of the pin terminal, realizes circumferential limitation of the pin terminal by the plugging of the first anti-rotation plug-in structure and the second anti-rotation plug-in structure, and at the same time realizes elimination of the gap between the pin terminal and the insulating body by arranging multiple circles of interference ribs on the positioning column. The present invention has a simple structure, simplifies the structure of the insulating body and the pin terminal, reduces production costs, and improves assembly efficiency and connection stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional diagram of the insulating body of the utility model;

[0015] Figure 2 This is a three-dimensional diagram of the pin terminal of the present utility model;

[0016] Figure 3 This is the front view of the utility model in the assembled state;

[0017] Figure 4 for Figure 3 Middle AA section view;

[0018] Figure 5 for Figure 4 Enlarged view of middle C part;

[0019] Figure 6 for Figure 3 Middle BB section view. DETAILED DESCRIPTION

[0020] Embodiment: A pin fixing structure includes an insulating body 1 and a pin terminal 2. The insulating body 1 is formed with a plug hole 11 on the inner side. The plug hole 11 is provided with an inner convex stopper that can be elastically deformed along its radial direction. One end of the pin terminal 2 is a mounting seat 21, and the other end of the pin terminal 2 is a conductive pin 22 with a diameter smaller than the mounting seat 21. The outer wall of the conductive pin 22 is provided with a conical outer convex stop ring 23 with an outer diameter of one end larger than that of the other end. The conductive pin 22 of the pin terminal 2 can be inserted from one end toward the other end. Inserted into the plug hole 11 of the insulating body 1, and the inner convex stopper in the plug hole 11 stops on the end surface of the conical outer convex stop ring 23 with a larger diameter of the pin terminal 2, the mounting seat 21 at one end of the pin terminal 2 stops on the end surface of one end of the insulating body 1, an eccentric first anti-rotation plug-in structure is provided on one end of the insulating body 1, and an eccentric second anti-rotation plug-in structure is provided on the mounting seat 21 of the pin terminal 2. The first anti-rotation plug-in structure and the second anti-rotation plug-in structure are plugged into each other so that the pin terminal 2 and the insulating body 1 are stopped and positioned in the circumferential direction.

[0021] When the conductive pin 22 of the pin terminal 2 is inserted into the plug hole 11 of the insulating body 1 for a certain distance, the end face of one end of the insulating body 1 blocks the surface of the mounting seat 21 at one end of the pin terminal 2, preventing the conductive pin 22 from continuing to move forward. At this time, the conical convex retaining ring 23 on the conductive pin 22 just passes the inward convex stopper in the pin hole, and the inward convex stopper in the pin hole elastically resets and blocks one end of the conical convex retaining ring 23, thereby stopping the pin terminal 2 axially in position. At the same time, the first anti-rotation plug-in structure on one end of the insulating body 1 and the second anti-rotation plug-in structure on the mounting seat 21 of the pin terminal 2 form a plug-in connection, realizing the circumferential stop positioning of the pin terminal 2 and the insulating body 1. The above structure realizes the stable positioning of the pin terminal 2 on the insulating body 1, and the structure of the insulating body 1 and the pin terminal 2 is simple and easy to assemble. After assembly, the pin terminal 2 is stably positioned.

[0022] The plug-in hole 11 on the inner side of the insulating body 1 is a stepped hole with an inner diameter at one end smaller than that at the other end. The inwardly convex stopper includes a plurality of cantilever structures 12 provided on the stepped surface between the two ends of the plug-in hole 11. The cantilever structure 12 extends a set distance toward the other end of the plug-in hole 11, and a card point 13 is formed at the end of the cantilever structure 12, which protrudes toward the center line of the plug-in hole 11. When the conductive pin 22 of the pin terminal 2 is inserted, the conical protruding stop ring 23 on the conductive pin 22 can force the cantilever structure 12 to swing elastically to avoid it. When the conical protruding stop ring 23 on the conductive pin 22 passes over the free end of the cantilever structure 12, the card point 13 at the free end of the cantilever structure 12 is elastically reset along with the cantilever structure 12 and stops on the end surface of the conical protruding stop ring 23 of the pin terminal 2 with a larger diameter.

[0023] The inward convex stopper utilizes the elastic swing of the cantilever structure 12 to realize the radial elastic movement of its end clamping point 13 in the plug-in hole 11. The above structure is simple, and the cantilever structure 12 can be integrally formed in the plug-in hole 11 of the insulating body 1. In addition, the inward convex stopper can also be composed of a slider radially slidably installed on the side wall of the insulating body 1 and an elastic member that provides radial elastic force to the slider. This is an equivalent replacement that can be easily thought of by technical personnel in this field based on this application, and it also falls within the scope of protection of this application.

[0024] A positioning post 24 is further provided between the conductive pin 22 and the mounting seat 21. The positioning post 24 is directly between the conductive pin 22 and the mounting seat 21. The positioning post 24 is inserted into the end with a smaller diameter of the plug hole 11. The positioning post 24 and the conductive pin 22 are transitionally connected through a chamfered slope 25. The card point 13 on the free end of the cantilever structure 12 can be accommodated in the annular gap formed between the conical convex retaining ring 23 and the positioning post 24, and one end of the card point 13 contacts the chamfered slope between the positioning post 24 and the conductive pin 22 through the slope, and the other end of the card point 13 contacts the end face of the conical convex retaining ring 23 through a plane. A slope 25 is formed at one end of the card point 13, and a straight surface is formed at the other end. When it contacts the conical convex retaining ring 23, it will not get stuck. The contact between the slopes can smoothly slide relative to each other while the cantilever structure 12 elastically swings to avoid it. After the conical convex retaining ring 23 passes over the card point 13, as the cantilever structure 12 elastically resets, the card point 13 is just accommodated in the space formed between the positioning column 24 and the conical convex retaining ring 23. The space matches the shape of the card point 13. The slope of the card point 13 contacts the chamfered slope of the positioning column 24, and the chamfered slope of the positioning column 24 supports the slope of the card point 13 to prevent the card point 13 from being compressed and broken.

[0025] The outer circumference of the positioning post 24 of the pin terminal 2 is provided with at least one circular interference rib 26. This interference rib 26 forms an interference fit with the inner side surface of the smaller diameter end of the insertion hole 11. The interference rib 26 closely contacts the inner wall of the insertion hole 11 of the insulating body 1, thereby eliminating any gap between the pin terminal 2 and the insertion hole 11 of the insulating body 1 and preventing the conductive pin 22 from dangling within the insertion hole 11 of the insulating body 1.

[0026] The positioning post 24 is provided with two circles of interference ribs 26 on its outer circumference, one at each axial end of the positioning post 24. The two circles of interference ribs 26 further prevent the conductive pin 22 from shaking or oscillating in the insertion hole 11 of the insulating body 1.

[0027] The first anti-rotation plug-in structure is a boss 14 provided on one end of the insulating body 1, and the second anti-rotation plug-in structure is a groove 27 provided on the end surface of the mounting base 21. The bosses 14 are inserted into the grooves 27 in a one-to-one correspondence. When the pin terminal 2 is plugged into the insulating body 1, the bosses 14 automatically insert into the grooves 27, achieving the opposite insertion. This opposite insertion structure effectively limits the relative rotation of the pin terminal 2 and the insulating body 1 in the circumferential direction, while also enhancing the connection stability between the two and preventing shaking.

[0028] The bosses 14 are long strip bosses 14 symmetrically arranged on both sides of one end of the insulating body 1, and the grooves 27 are notches symmetrically arranged on the end surface of the mounting seat 21. The above structure is easy to manufacture, and the plug-in structure is strong and not easy to be damaged.

[0029] The inner edge of the opening end of the groove 27 and the outer edge of the boss 14 are both provided with a chamfered structure. The chamfer is used to avoid interference between the edge of the boss 14 and the edge of the groove 27 during plugging, so that the plug-in structure can be processed more tightly.

[0030] A sleeve 15 is fixedly provided on the outer side of one end of the insulating body 1, and a ring-shaped mounting groove is formed between the sleeve 15 and the outer side wall of one end of the insulating body 1. The inner side wall of the bottom of the mounting groove is connected to the outer side wall of one end of the insulating body 1 by a plurality of radially extending fixing ribs 16.

Claims

1. A pin fixing structure, comprising an insulating body (1) and a pin terminal (2), wherein a plug hole (11) is formed on the inner side of the insulating body, and an inner convex stopper capable of elastic deformation along its radial direction is provided in the plug hole, one end of the pin terminal is a mounting seat (21), and the other end of the pin terminal is a conductive pin (22) with a diameter smaller than the mounting seat, a tapered outer convex stop ring (23) with an outer diameter at one end larger than that at the other end is provided on the outer wall of the conductive pin, the conductive pin of the pin terminal can be inserted into the plug hole of the insulating body from one end toward the other end, and the inner convex stopper in the plug hole stops on the end surface of the tapered outer convex stop ring of the pin terminal with a larger diameter, characterized in that: The mounting seat at one end of the pin terminal is stopped on the end surface of one end of the insulating body. An eccentric first anti-rotation plug-in structure is provided on one end of the insulating body, and an eccentric second anti-rotation plug-in structure is provided on the mounting seat of the pin terminal. The first anti-rotation plug-in structure and the second anti-rotation plug-in structure are plugged into each other so that the pin terminal and the insulating body are stopped and positioned in the circumferential direction.

2. The pin fixing structure according to claim 1, wherein: The plug-in hole inside the insulating body is a stepped hole with an inner diameter at one end smaller than that at the other end. The inner convex stopper comprises a plurality of cantilever structures (12) arranged on the stepped surface between the two ends of the plug-in hole. The cantilever structure extends a set distance toward the other end of the plug-in hole, and the end of the cantilever structure forms a card point (13) protruding toward the center line of the plug-in hole. When the conductive pin of the pin terminal is inserted, the conical outer convex stop ring on the conductive pin can force the cantilever structure to swing elastically to avoid it. When the conical outer convex stop ring on the conductive pin passes over the free end of the cantilever structure, the card point at the free end of the cantilever structure is elastically reset with the cantilever structure and stops on the end surface of the pin terminal with the larger diameter of the conical outer convex stop ring.

3. The pin fixing structure according to claim 2, wherein: A positioning column (24) is further provided between the conductive pin and the mounting seat. The positioning column is directly located between the conductive pin and the mounting seat. The positioning column is inserted into the end of the plug hole with a smaller diameter. The positioning column and the conductive pin are transitionally connected via a chamfered bevel (25). The card point on the free end of the cantilever structure can be accommodated in the annular gap formed between the conical outer convex retaining ring and the positioning column, and one end of the card point contacts the chamfered bevel between the positioning column and the conductive pin via the bevel, and the other end of the card point contacts the end face of the conical outer convex retaining ring via a plane.

4. The pin fixing structure according to claim 3, wherein: At least one circle of circular interference ribs (26) is provided on the outer circumferential surface of the positioning column of the pin terminal, and the interference ribs are interference-fitted with the inner side surface of the end with the smaller diameter of the plug hole.

5. The pin fixing structure according to claim 4, characterized in that: Two circles of interference ribs are provided on the outer circumferential surface of the positioning column, and the two circles of interference ribs are respectively located on the outer circumferential surfaces of the two axial ends of the positioning column.

6. The pin fixing structure according to claim 1, wherein: The first anti-rotation plug-in structure is a boss (14) provided on one end of the insulating body, and the second anti-rotation plug-in structure is a groove (27) provided on the end surface of the mounting seat, and the bosses are inserted into the grooves in a one-to-one correspondence.

7. The pin fixing structure according to claim 6, characterized in that: The boss is a long strip boss symmetrically arranged on both sides of one end of the insulating body, and the groove is a notch symmetrically arranged on the end surface of the mounting seat.

8. The pin fixing structure according to claim 6, characterized in that: The inner edge of the opening end of the groove and the outer edge of the boss are both provided with chamfer structures.

9. The pin fixing structure according to claim 6, wherein: A jacket (15) is fixedly provided on the outside of one end of the insulating body, and a ring-shaped mounting groove is formed between the jacket and the outer wall of one end of the insulating body. The inner wall of the bottom of the mounting groove and the outer wall of one end of the insulating body are connected by a plurality of radially extending fixing ribs (16).

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