Shock proof plug and an electrical connection assembly

Abstract

The utility model discloses a prevent electric shock plug connector and an electric connection assembly, male terminal, its plug end is equipped with axial installation cavity, the inner wall of installation cavity is equipped with threaded hole and clamping groove in proper order and is kept apart, prevent electric shock cap, including the plugging section, the connecting section and the clamping section in proper order, the connecting section is at least partial screw rod, the clamping section end is equipped with clamping structure, the screw rod is with threaded hole screw joint, clamping structure is with clamping groove clamping, forms double locking, the utility model discloses prevent electric shock cap adopt the mode of clamping and screw joint and prevent electric shock cap is fixed in male terminal, prevent electric shock cap double -fixed to prevent electric shock cap from falling off in installation cavity.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, and more specifically, to an anti-electric shock connector and an electrical connection assembly. Background Technology

[0002] With the rapid development of new energy electric vehicles, the use of terminals for electrical connections is increasing. The terminals used in charging guns and charging sockets are mainly used to transmit electrical signals or conduct electricity. The terminals need to be plugged into mating terminals to achieve electrical connection. When not plugged into mating terminals, the cavity of the terminal's plug-in part has an opening. If the opening is not fully covered, it is easy for fingers to accidentally enter and cause electric shock risk. Traditional terminals insert anti-snap mechanisms into the cavity of their plug-in part to prevent electric shock. However, the anti-snap mechanism and the cavity are only connected by ordinary threads, which can easily fall off, leading to electrical risks.

[0003] Therefore, a new solution is urgently needed in the existing technology to solve the above problems. Utility Model Content

[0004] One objective of this invention is to provide a new technical solution for an anti-electric shock connector and an electrical connection assembly to address the problem that when the terminal is not plugged into the mating terminal, the cavity of the terminal's plug-in part has an opening, and the opening is not fully covered, making it easy for fingers to accidentally enter and cause electric shock, as well as the problem that traditional anti-electric shock caps are easy to fall off.

[0005] According to this utility model, an anti-electric shock connector is provided, including a male terminal with an axial mounting cavity at its plug end, wherein threaded holes and snap-fit ​​grooves are sequentially spaced on the inner wall of the mounting cavity; and an anti-electric shock cap, including a sealing section, a connecting section, and a snap-fit ​​section connected in sequence, wherein at least part of the connecting section is a screw, and the end of the snap-fit ​​section is provided with a snap-fit ​​structure; the screw is screwed into the threaded hole, and the snap-fit ​​structure is snapped into the snap-fit ​​groove to form a double locking.

[0006] Optionally, the diameter of the sealing section is greater than the diameter of the opening end of the mounting cavity, and less than or equal to the outer diameter of the male terminal.

[0007] Optionally, the ratio of the screw length to the connecting section length is 0.5-1.

[0008] Optionally, the snap-fit ​​structure consists of two symmetrically arranged elastic snap-fit ​​arms, with the free ends of the elastic snap-fit ​​arms protruding radially outward to form snap-fit ​​portions.

[0009] Optionally, the free end of the snap-fit ​​portion is provided with a guide portion to adapt to the insertion path of the snap-fit ​​groove.

[0010] Optionally, the guide portion is constructed as a cone with decreasing diameter, and the end edge of the cone is rounded or chamfered.

[0011] Optionally, the material of the elastic snap-fit ​​arm is nylon or modified PBT or PBT-GF30.

[0012] Optionally, the sealing section, connecting section, and snap-fit ​​section are integrally injection molded.

[0013] This utility model also provides an electrical connection assembly, including a female terminal and an anti-electric shock plug as described above. The outer wall of the sealing section of the anti-electric shock cap has a guide surface, and the plug end of the female terminal is provided with a plug cavity. When the male terminal is inserted into the plug cavity, the guide surface contacts the inner wall of the female terminal to guide the plug-in.

[0014] Optionally, the guide surface is an inclined surface or an arc surface.

[0015] The beneficial effects of this utility model are as follows:

[0016] The mounting cavity of the male terminal of this utility model has threaded holes and snap-fit ​​grooves spaced apart in sequence on its inner wall. A screw is provided at the connection part of the anti-contact cap, and a snap-fit ​​structure is provided at the end of the snap-fit ​​section. The screw is screwed into the threaded hole, and the snap-fit ​​structure is snapped into the snap-fit ​​groove to form a double lock, preventing the anti-contact cap from falling off. The anti-contact cap, which is firmly fixed, can prevent fingers from accidentally entering the cavity of the terminal from the opening of the plug section, thus preventing the risk of electric shock.

[0017] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0019] Figure 1 This is a cross-sectional view of the anti-electric shock connector of this utility model;

[0020] Figure 2 This is a cross-sectional view of the male terminal of this utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the anti-contact cap of this utility model.

[0022] The diagram is marked as follows:

[0023] 10. Male terminal; 11. Mounting cavity; 111. Opening; 112. Threaded hole; 113. Snap-fit ​​groove; 20. Anti-contact cap; 21. Sealing section; 211. Guide surface; 22. Connecting section; 221. Screw; 23. Snap-fit ​​section; 231. Flexible snap-fit ​​arm; 232. Snap-fit ​​part; 233. Guide part; 234. Rounded or chamfered. Detailed Implementation

[0024] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0025] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0026] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0027] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0028] This utility model provides an anti-electric shock connector, such as Figures 1-3 As shown, it includes a male terminal 10, the plug end of which is provided with an axial mounting cavity 11. The inner wall of the mounting cavity 11 is provided with threaded holes 112 and snap-fit ​​grooves 113 at intervals. The anti-touch cap 20 includes a sealing section 21, a connecting section 22 and a snap-fit ​​section 23 connected in sequence. The connecting section 22 is at least partly a screw 221. The snap-fit ​​section 23 is provided with a snap-fit ​​structure at its end. The screw 221 is screwed into the threaded hole 112, and the snap-fit ​​structure is snapped into the snap-fit ​​groove 113 to form a double lock.

[0029] With the rapid development of new energy electric vehicles, the use of terminals for electrical connections is increasing. The terminals used in charging guns and charging sockets are mainly used to transmit electrical signals or conduct electricity. The terminals need to be plugged into mating terminals to achieve electrical connection. When not plugged into mating terminals, the cavity of the terminal's plug-in part has an opening 111. The opening 111 is not fully covered and is open, which makes it easy for fingers to accidentally enter and cause electric shock risk. Traditional terminals insert an anti-snap mechanism into the cavity of their plug-in part to prevent electric shock. However, the anti-snap mechanism and the cavity are only connected by ordinary threads, which can easily fall off, leading to electrical risks.

[0030] In this invention, the inner wall of the mounting cavity 11 of the male terminal 10 is provided with threaded holes 112 and snap-fit ​​grooves 113 at intervals. A screw 221 is provided at the connecting part of the anti-contact cap 20, and a snap-fit ​​structure is provided at the end of the snap-fit ​​section 23. The screw 221 is screwed into the threaded hole 112, and the snap-fit ​​structure is snapped into the snap-fit ​​groove 113 to form a double lock, preventing the anti-contact cap 20 from falling off. The anti-contact cap 20, which is firmly fixed, can prevent fingers from accidentally entering the cavity of the terminal from the opening 111 of the plug section, thus preventing the risk of electric shock.

[0031] In some embodiments, such as Figure 1 As shown, the diameter of the sealing section 21 is greater than the diameter of the opening 111 end of the mounting cavity 11, and less than or equal to the outer diameter of the male terminal 10.

[0032] The diameter of the plug section is larger than the diameter of the opening 111 of the mounting cavity 11. In order to seal the opening 111 of the mounting cavity 11 and prevent the risk of electric shock caused by accidental finger insertion, the diameter of the plug section is also less than or equal to the outer diameter of the male terminal 10 so that it is flush with the outer wall of the male terminal 10, which is aesthetically pleasing and avoids the waste of material costs due to excessively large diameter.

[0033] In some embodiments, such as Figure 3 As shown, the ratio of the length b of the screw 221 to the length a of the connecting section 22 is 0.5-1.

[0034] When the ratio of the length b of the screw 221 to the length a of the connecting section 22 is less than 0.5, the anti-touch cap 20 will fall off due to insufficient connection screw length. Therefore, the inventors prefer the ratio of the length b of the screw 221 to the length a of the connecting section 22 to be 0.5-1. In some embodiments, the ratio of the length b of the screw 221 to the length a of the connecting section 22 is also 0.5 and 1.

[0035] In some embodiments, such as Figure 1 , Figure 3 As shown, the snap-fit ​​structure consists of two symmetrically arranged elastic snap-fit ​​arms 231, with the free ends of the elastic snap-fit ​​arms 231 protruding radially outward to form snap-fit ​​portions 232.

[0036] The radially outward protruding snap-fit ​​portion 232 of the free end of the elastic snap-fit ​​arm 231 snaps into the snap-fit ​​groove 113, which serves to double-fix the anti-contact cap 20 on the basis of the screw connection between the stud and the threaded hole 112, strengthen the connection between the anti-contact cap 20 and the male terminal 10, and prevent the anti-contact cap 20 from falling off and causing the risk of electric shock.

[0037] In some embodiments, such as Figure 1 , Figure 3 As shown, the free end of the snap-fit ​​part 232 is provided with a guide part 233, which is adapted to the insertion path of the snap-fit ​​groove 113.

[0038] The guide part 233 is designed to guide the anti-touch cap 20 into the mounting cavity 11 so that the stud can be screwed into the threaded hole 112 and the snap-fit ​​part 232 can be snapped into the snap-fit ​​groove 113.

[0039] In some embodiments, such as Figure 3 As shown, the guide portion 233 is constructed as a cone with decreasing diameter, and the end edge of the cone is rounded 234 or chamfered 234.

[0040] The rounded or chamfered design 234 can guide the guide part 233 to quickly enter the snap-fit ​​groove 113, so that the snap-fit ​​part 232 snaps into the snap-fit ​​groove 113, while also preventing the guide part 233 from colliding with the opening 111 of the male terminal 10 mounting cavity 11 when it enters the mounting cavity 11, which would cause damage to the anti-contact cap 20 and the male terminal 10.

[0041] In some embodiments, the material of the elastic snap-fit ​​arm 231 is nylon or modified PBT or PBT-GF30.

[0042] The elastic snap-fit ​​arm 231 made of nylon or modified PBT or PBT-GF30 has excellent mechanical strength and heat resistance, ensuring its elasticity while increasing its strength and extending the service life of the elastic snap-fit ​​arm 231.

[0043] In some embodiments, the sealing section 21, the connecting section 22, and the snap-fit ​​section 23 are integrally injection molded.

[0044] One-piece injection molding makes the overall structure of the anti-contact cap 20 more robust and stable.

[0045] This utility model also provides an electrical connection assembly, including a female terminal and an anti-electric shock plug as described above, such as... Figure 1 , Figure 3 As shown, the outer wall of the sealing section 21 of the anti-touch cap 20 has a guide surface 211, and the plug end of the female terminal is provided with a plug cavity. When the male terminal 10 is inserted into the plug cavity, the guide surface 211 contacts the inner wall of the female terminal to guide the plug-in.

[0046] In some embodiments, such as Figure 1 , Figure 3 As shown, the guide surface 211 is an inclined surface or an arc surface.

[0047] The inclined or curved guide surface 211 can guide the insertion of the female terminal and the male terminal 10.

[0048] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A shockproof connector, characterized in that: The male terminal has an axial mounting cavity at its plug end, and the inner wall of the mounting cavity is provided with threaded holes and snap-fit ​​grooves at intervals in sequence; The anti-contact cap includes a sealing section, a connecting section, and a snap-fit ​​section connected in sequence. The connecting section is at least partially a screw, and the snap-fit ​​section has a snap-fit ​​structure at its end. The screw is screwed into the threaded hole, and the snap-fit ​​structure snaps into the snap-fit ​​groove to form a double locking.

2. The anti-electric shock connector according to claim 1, characterized in that: The diameter of the sealing section is greater than the diameter of the opening end of the mounting cavity, but less than or equal to the outer diameter of the male terminal.

3. The anti-electric shock connector according to claim 1, characterized in that: The ratio of the screw length to the connecting section length is 0.5-1.

4. The anti-electric shock connector according to claim 1, characterized in that: The snap-fit ​​structure consists of two symmetrically arranged elastic snap-fit ​​arms, with the free ends of the elastic snap-fit ​​arms protruding radially outward to form snap-fit ​​portions.

5. The anti-electric shock connector according to claim 4, characterized in that: The free end of the snap-fit ​​part is provided with a guide part to adapt to the insertion path of the snap-fit ​​groove.

6. The anti-electric shock connector according to claim 5, characterized in that: The guide portion is constructed as a tapered body with decreasing diameter, and the end edge of the tapered body is rounded or chamfered.

7. The anti-electric shock connector according to claim 4, characterized in that: The material of the elastic snap-fit ​​arm is nylon or modified PBT or PBT-GF30.

8. The anti-electric shock connector according to claim 1, characterized in that: The sealing section, connecting section, and snap-fit ​​section are integrally injection molded.

9. An electrical connection assembly, comprising a female terminal and an anti-electric shock connector as described in any one of claims 1-8, characterized in that: The outer wall of the sealing section of the anti-contact cap has a guide surface. The female terminal has a plug-in cavity. When the male terminal is inserted into the plug-in cavity, the guide surface contacts the inner wall of the female terminal to guide the insertion.

10. The electrical connection assembly according to claim 9, characterized in that: The guide surface is an inclined surface or an arc surface.

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