Plug

Abstract

The utility model discloses a plug, and relates to the technical field of connector plugs, and the system comprises a crown spring which is configured to be used for establishing the electric connection between a socket and the plug; the metal piece body comprises a connecting part and an inserting part which are connected with each other, the connecting part is used for being externally connected with an equipment power supply, an inserting hole is formed in the inserting part, the crown spring is assembled in the inserting hole, a limiting piece is formed on the hole wall of the inserting hole in a stamping mode, and the limiting piece is used for limiting movement of the crown spring in the inserting hole; the plastic shell is wrapped on the metal piece body in an injection molding mode, a mounting hole is formed in the plastic shell, the mounting hole is used for allowing the male end of the socket to be inserted into the inserting hole to be connected with the crown spring, the limiting piece is formed through the stamping technology, an original organic machining mode is replaced, and the effects of reducing the production cycle and reducing the production cost are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of connector plugs, and particularly relates to a plug. Background Art

[0002] The insulating housing of a connector plug is usually formed by an injection molding process. By plastic overmolding the plug metal parts, a connector plug is formed.

[0003] In the female pin structure of a connector plug in the related art, in order to meet the requirements of potting, after stamping the female pin metal part body, machining is required on the inner side wall of the metal part body, so that a ring groove for installing a crown spring is formed on the inner side wall of the female pin metal part body.

[0004] Since machining is carried out after the stamping of the metal part body, it will lead to an extended processing cycle, increased production costs, and wasted production materials. Content of the Utility Model

[0005] The utility model provides a plug to achieve the effect of reducing the production cycle and production costs.

[0006] The utility model specifically adopts the following technical solutions:

[0007] A plug, comprising:

[0008] A crown spring configured to establish an electrical connection between a socket and the plug;

[0009] A metal part body, which includes a connecting part and a plugging part connected to each other. The connecting part is used to externally connect to the power supply of a device. A plugging hole is formed on the plugging part. The crown spring is assembled in the plugging hole. A limiting part is formed by stamping on the hole wall of the plugging hole. The limiting part is used to limit the movement of the crown spring in the plugging hole;

[0010] A plastic housing, which is injection molded and coated on the metal part body. An installation hole is formed on the plastic housing. The installation hole is used for the male end of the socket to be inserted into the plugging hole and connected to the crown spring.

[0011] Optionally, the limiting part includes at least two limiting convex bumps. The two limiting convex bumps are oppositely arranged along the diameter direction of the plugging hole. The limiting convex bumps are formed by stamping on the hole wall of the plugging hole.

[0012] Optionally, the plugging part includes an upper part and a lower part. The limiting convex bumps are located between the upper part and the lower part.

[0013] Optionally, the aperture of the upper part is set as D1, and the distance between the two opposite limiting convex bumps is set as D2, and D1 < D2.

[0014] Optionally, the aperture diameter of the lower part is set as D3, where D3 = D2 or D3 ≠ D2.

[0015] Optionally, the outer diameter of the upper part of the insertion part is greater than the outer diameter of the lower part of the insertion part.

[0016] Optionally, a support ring is formed on the end wall of the lower part, a limiting space is enclosed between the opposite side walls of the limiting member and the support ring, and the crown spring is assembled in the limiting space.

[0017] Optionally, the inner ring diameter of the support ring is set as D4, where D4 > D1.

[0018] Optionally, the insertion part is perpendicularly connected to the connection part, a connection hole communicating with the insertion hole is provided on the side wall of the connection part, and the central axes of the connection hole, the insertion hole, the support ring, and the mounting hole are collinear.

[0019] Optionally, an anti-touch finger structure is formed on the plastic housing, the free end of the anti-touch finger structure sequentially passes through the connection hole, the insertion hole, the inner ring of the support ring, and the mounting hole, and the anti-touch finger structure is used for plugging and mating with the male end of the socket.

[0020] A plug provided by the present utility model has the following beneficial effects:

[0021] 1. The limiting convex hull is formed by stamping on the side wall of the insertion part of the metal part body. Four stamping convex hulls are used to limit the displacement of the crown spring in the insertion hole, eliminating a machining operation on the inner side wall of the insertion part, effectively reducing the production cycle and cost;

[0022] 2. The aperture diameter of the upper part of the insertion part of the metal part body is set to be smaller than that of the lower part of the insertion part, so as to facilitate the extraction of the mold parts after the injection molding of the metal part body is completed, reducing the complexity of the mold structure and the production cost;

[0023] 3. The outer diameter of the upper part of the insertion part of the metal part body is set to be greater than that of the lower part, and the thickness of the upper part is greater than that of the lower part, facilitating the injection molding of the upper part of the insertion part;

[0024] 4. The inner ring diameter D4 of the support ring is set to be greater than D1 of the upper part of the insertion part, facilitating the extraction of the mold after the injection molding of the plastic housing.

[0025] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present utility model, nor is it used to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. Description of the Drawings

[0026] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is the overall schematic diagram of the plug embodied in the embodiments of this application;

[0028] Figure 2 It is the structural schematic diagram of the plug after hiding the crown spring;

[0029] Figure 3 It is the structural schematic diagram of the metal part body embodied in the embodiments of this application;

[0030] Figure 4 It is the cross-sectional schematic diagram of the connection relationship between the metal part body and the plastic housing embodied in the embodiments of this application.

[0031] Reference numerals: 1, plastic housing; 101, mounting hole; 102, finger protection structure; 103, buckle; 2, metal part body; 21, insertion part; 211, upper part; 212, lower part; 22, insertion hole; 23, connection part; 24, connection hole; 25, support ring; 3, crown spring; 4, limiting part; 41, limiting convex bump. Detailed implementation manners

[0032] In order to enable those skilled in the art to better understand the solutions of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] It should be noted that the terms "first", "second", etc. in the description, claims and the above drawings of the present utility model are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0034] This embodiment provides a plug. Referring to Figures 1 - 3 , it includes a metal part body 2, and a plastic housing 1 is injection-molded and coated on the metal part body 2. The metal part body 2 includes a connecting part 23 and a plugging part 21 formed by integral stamping. The free end of the connecting part 23 is used for externally connecting a cable. The plugging part 21 is arranged in an annular shape, and the plugging part 21 is vertically connected to the connecting part 23. A plugging hole 22 is formed on the plugging part 21, and a connecting hole 24 is formed on the connecting part 23. An installation hole 101 is formed on the plastic housing 1. The central axes of the installation hole 101, the plugging hole 22 and the connecting hole 24 are collinear, and the connecting hole 24, the plugging hole 22 and the installation hole 101 communicate with each other.

[0035] In this embodiment, an anti-touch finger structure 102 is integrally injection-molded on the plastic housing 1. The anti-touch finger structure 102 is arranged in a cylindrical shape. The central axes of the anti-touch finger structure 102, the connecting hole 24, the plugging hole 22 and the support ring 25 are collinear. The free end of the anti-touch finger structure 102 sequentially passes through the connecting hole 24, the plugging hole 22, the support ring 25 and the installation hole 101. The free end of the anti-touch finger structure 102 extends out of the installation hole 101 of the plastic housing 1. The anti-touch finger structure 102 can be plugged and matched with the male end of the socket. By using the good insulation effect of the anti-touch finger structure 102, it can effectively prevent the operator's fingers from accidentally touching the metal part body 2 and play a role in safety protection.

[0036] Two buckles 103 are further formed on the side wall of the plastic housing 1. A clamping seat (not shown in the figure) is provided on the housing of the male end of the socket. The buckles 103 are clamped and matched with the buckles 103, and the plastic housing 1 can be clamped and connected to the male end of the socket through the buckles 103.

[0037] In order to provide a reliable connection between the female end of the plug and the male end of the socket, a crown spring 3 is assembled in the insertion hole 22. Four limiting convex bumps 41 are formed by stamping on the hole wall of the insertion hole 22. The four limiting convex bumps 41 are arrayed along the circumferential direction of the insertion hole 22. The four limiting convex bumps 41 constitute a limiting member 4. The limiting member 4 restricts the displacement of the crown spring 3 on the insertion hole 22. The crown spring 3 is restricted between the four limiting convex bumps 41 and the hole wall of the insertion hole 22. In this embodiment, the number of the limiting convex bumps 41 can be set to multiple, and at least two limiting convex bumps 41 need to be set. By stamping the limiting convex bumps 41 on the outer side wall of the insertion part 21, one step of machining the inner side wall of the insertion part 21 is omitted, effectively reducing the production cycle and cost.

[0038] Referring to Figure 3 and Figure 4 , in this embodiment, the annular insertion part 21 includes an upper part 211 and a lower part 212. Four limiting convex bumps 41 are formed on the hole wall of the insertion hole 22 and are located between the upper part 211 and the lower part 212, and the four limiting convex bumps 41 are located on the side close to the upper part 211.

[0039] A support ring 25 is integrally formed on the bottom wall of the lower part 212. The four limiting convex bumps 41 and the support ring 25 are oppositely arranged. A limiting space is formed by enclosing between the opposite side walls of the four limiting convex bumps 41 and the support ring 25. The crown spring 3 is assembled in the limiting space. The cooperation of the support ring 25 and the limiting member 4 plays a role in limiting the position of the crown spring 3 in the insertion hole 22, preventing the crown spring 3 from displacing in the insertion hole 22.

[0040] Referring to Figure 4 , in the injection molding process of the metal part body 2, since the limiting convex bumps 41 are formed by stamping on the inner side wall of the insertion part 21, in order to facilitate the extraction of the mold parts from the insertion part 21 during overmolding, in this embodiment, the aperture of the upper part 211 of the insertion part 21 is set as D1, and the distance between two opposite limiting convex bumps 41 in the diameter direction of the insertion part 21 is set as D2, and D1 < D2, reducing the complexity of the mold structure and production cost.

[0041] The aperture of the lower part 212 is set as D3. It should be noted that in this embodiment, the aperture D3 of the lower part 212 is not limited, and D3 = D2 or D3 ≠ D2 is set. By setting the aperture of the upper part 211 of the insertion part 21 to be smaller than the aperture of the lower part 212 of the insertion part 21, it is convenient to extract the mold parts after the injection molding of the metal part body 2 is completed.

[0042] In this embodiment, the inner ring diameter of the support ring 25 is set as D4, and D4 > D1 is set, which is convenient for extracting the mold after the injection molding is completed.

[0043] Referring to Figure 4, in this embodiment, the position of the upper part 211 of the insertion part 21 of the metal part body 2 is the glue-sealing place. When stamping the metal part body 2, it is necessary to extrude the upper part 211 of the insertion part 21 so that the aperture of the upper part 211 of the insertion part 21 is smaller than that of the lower part 212 of the insertion part 21. The outer diameter of the upper part 211 of the insertion part 21 is set to be larger than that of the lower part 212, that is, the thickness of the upper part 211 is greater than that of the lower part 212. Therefore, there is more material in the outer diameter of the upper part 211 of the insertion part 21, which is convenient for stamping and forming the upper part 211 of the insertion part 21.

[0044] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A plug, characterized in that, Comprising: A crown spring (3), configured to establish an electrical connection between a socket and a plug; A metal body (2), which includes a connecting portion (23) and a plugging portion (21) connected to each other. The connecting portion (23) is used for an external device power supply. A plugging hole (22) is formed on the plugging portion (21). The crown spring (3) is assembled in the plugging hole (22). A limiting member (4) is formed by stamping the hole wall of the plugging hole (22). The limiting member (4) is used to limit the movement of the crown spring (3) within the plugging hole (22); A plastic housing (1), which is injection molded and coated on the metal body (2). An installation hole (101) is formed on the plastic housing (1). The installation hole (101) is used for a male socket end to be inserted into the plugging hole (22) and connected to the crown spring (3).

2. The plug according to claim 1, characterized in that, The limiting member (4) includes at least two limiting protrusions (41). The two limiting protrusions (41) are oppositely arranged along the diameter direction of the plugging hole (22). The limiting protrusions (41) are formed by stamping the hole wall of the plugging hole (22).

3. The plug according to claim 2, characterized in that, The plugging portion (21) includes an upper part (211) and a lower part (212). The limiting protrusion (41) is located between the upper part (211) and the lower part (212).

4. The plug according to claim 3, characterized in that, The diameter of the upper part (211) is set as D1, and the distance between the two opposite limiting protrusions (41) is set as D2. The D1 < D2.

5. The plug according to claim 4, characterized in that, The diameter of the lower part (212) is set as D3. The D3 = D2 or D3 ≠ D2.

6. The plug according to claim 3, characterized in that, The outer diameter of the upper part (211) of the plugging portion (21) is larger than the outer diameter of the lower part (212) of the plugging portion (21).

7. The plug according to claim 4, characterized in that, A support ring (25) is formed on the end wall of the lower part (212). A limiting space is enclosed between the opposite side walls of the limiting member (4) and the support ring (25). The crown spring (3) is assembled in the limiting space.

8. The plug according to claim 7, characterized in that, The inner ring diameter of the support ring (25) is set as D4. The D4 > D1.

9. The plug according to claim 7, wherein The plugging portion (21) is perpendicularly connected to the connecting portion (23). A connecting hole (24) communicating with the plugging hole (22) is provided on the side wall of the connecting portion (23). The central axes of the connecting hole (24), the plugging hole (22), the support ring (25), and the installation hole (101) are collinear.

10. The plug according to claim 9, characterized in that, An anti-touch finger structure (102) is formed on the plastic housing (1). The free end of the anti-touch finger structure (102) sequentially passes through the connecting hole (24), the plugging hole (22), the inner ring of the support ring (25), and the installation hole (101). The anti-touch finger structure (102) is used for plugging and cooperating with a male socket end.

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