Self-locking needle fixing structure and charging device

Abstract

The utility model provides a kind of fixed structure and charging device of self-locking needle, including the male end assembly and female end assembly that can be relatively assembled;The male end assembly is recessed to the side of female end assembly Formed opening's male end needle assembly cavity;The male end needle assembly cavity is fixedly installed with male end needle;The female end assembly includes female end mounting plate and female end mounting block installed on the female end mounting plate;The shape of female end mounting block is compatible with the male end needle assembly cavity, can be embedded in the male end needle assembly cavity;The female end mounting block is recessed to the side of male end assembly Formed opening's female end needle assembly cavity;The female end needle assembly cavity is fixedly installed with female end needle;When the female end mounting block is embedded in the male end needle assembly cavity, the male end needle and female end needle resist and communicate.This utility model reduces needle damage, installation is more firm, not easy to fall off.

Description

Technical Field

[0001] This utility model belongs to the field of connection equipment technology, specifically relating to a fixing structure and charging device for a self-locking spring pin. Background Technology

[0002] A spring-loaded connector is a component of electronic equipment. Springs bridge gaps in circuits or between isolated circuits, allowing current to flow and enabling the circuit to perform its intended function. Most spring-loaded connectors achieve current connection through the engagement of a male and female connector. During assembly, the male connector is typically inserted into the female connector, and during disassembly, the male connector is removed.

[0003] Currently, there are various methods for fixing spring pins on the market, but no reliable and stable method exists. Existing spring pin technologies mainly suffer from the following problems: 1. The spring pin is easily damaged during construction; 2. The spring pin is prone to falling off during use and cannot be secured; 3. The spring pin cannot easily make poor contact during use.

[0004] Therefore, a new type of spring pin fixing structure is urgently needed. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a self-locking spring pin fixing structure and charging device, which can reduce the damage to the spring pin during use and improve the fixing effect of the spring pin.

[0006] To achieve the above objectives / to solve the above technical problems, this utility model adopts the following technical solution: In the first aspect, this utility model provides a fixing structure for a self-locking spring pin, including a male end assembly and a female end assembly that can be assembled relative to each other. The male end assembly is recessed inward on one side relative to the female end assembly to form an opening male end spring pin assembly cavity; a male end spring pin is fixedly installed in the male end spring pin assembly cavity. The female end assembly includes a female end mounting plate and a female end mounting block mounted on the female end mounting plate; the shape of the female end mounting block is adapted to the male end spring pin assembly cavity and can be embedded in the male end spring pin assembly cavity; the female end mounting block is recessed inward on the side opposite to the male end assembly to form an opening for the female end spring pin assembly cavity; a female end spring pin is fixedly installed in the female end spring pin assembly cavity. When the female end mounting block is embedded in the male end spring pin assembly cavity, the male end spring pin and the female end spring pin are in contact and connected.

[0007] The above setup achieves the following effects: by concealing the male and female spring pins within specially shaped male and female assemblies, respectively, the shape of these assemblies is compatible with the spring pins, preventing direct contact with the spring pins during assembly or use, thus reducing the spring pin damage rate by 80%. Simultaneously, the interlocking connection between the female mounting block and the male spring pin assembly cavity ensures a more secure and stable installation, preventing them from easily falling off.

[0008] Furthermore, the male end assembly is provided with at least two male end spring pin assembly cavities; The position and number of the female end mounting block correspond to the male end spring pin assembly cavity.

[0009] The effect achieved by the above settings is that the existing structure generally uses a single set of spring pins. If any one of them is faulty, the assembly cannot work properly. At least with the double spring pin design, the occurrence rate of poor contact will be significantly reduced.

[0010] Furthermore, wire-passing holes are provided between the assembly cavities of each male end spring pin for circuit connection.

[0011] Furthermore, the female end assembly is provided with guide posts; each guide post is fitted with a guide sleeve. The male end assembly is provided with mounting holes corresponding to the shape and position of the guide sleeve; the mounting holes can be fitted and connected with the guide sleeve.

[0012] The above setup achieves the following effects: Existing male and female assemblies have poor fitting accuracy, and even after assembly, the spring pin may shift and be easily damaged. The guide post and specially designed guide sleeve enable fast installation and high precision. When the guide sleeve is installed on the guide post, wear is inevitable if the guide sleeve is used for a long time, which will increase the gap and affect the performance. In this case, the guide sleeve can be replaced to reduce the overall cost.

[0013] The guide sleeve can be made of POM material, which has high rigidity, high hardness, low coefficient of friction, good self-lubrication, and the addition of flame retardants can effectively prevent fire.

[0014] Furthermore, the female end assembly is provided with guide posts on both sides in the length direction; The male end assembly has mounting holes on both sides along its length that correspond to the shape and position of the guide sleeve.

[0015] The above setup achieves the following effects: By setting guide posts at both ends along the length, it helps improve assembly accuracy, facilitates the alignment of male and female assemblies, provides good guidance and fixation, and effectively controls misalignment, deformation, and other defects during modular assembly.

[0016] Furthermore, the fixing structure also includes a self-locking mechanism for locking the male end assembly and the female end assembly together.

[0017] The above settings achieve the following effects: When in use, the male and female assemblies are joined together, ensuring good contact between the male and female ends of the spring pin. The self-locking mechanism effectively prevents the spring pin from falling off or shifting, making the assembled product more stable and preventing it from automatically detaching.

[0018] Furthermore, the self-locking mechanism includes at least one set of self-locking buckles and self-locking sliders arranged opposite to each other; The self-locking buckle is fixed on the female end assembly; the self-locking slider is slidably disposed on the male end assembly, and can move closer to or further away from the self-locking buckle. The self-locking slider is provided with a sliding long screw hole, and the self-locking slider is slidably connected to the outside of the male end assembly by a screw passing through the sliding long screw hole; a return spring is provided between the self-locking slider and the male end assembly; The reset spring can drive the self-locking slider to slide towards the self-locking buckle; The self-locking buckle includes a column fixed on the female end mounting plate and a stop block disposed on the column; the distance between the bottom of the stop block and the female end mounting plate is greater than the height of the self-locking slider; the stop block is provided with a ramp surface facing the self-locking slider. The self-locking slider has a second slope surface opposite to the first slope surface on the side near the self-locking buckle; When the male and female end assemblies are engaged, ramp one and ramp two cause the self-locking slider to slide away from the self-locking buckle. When the self-locking slider moves to the lower end of the stop, the return spring causes the self-locking slider to slide closer to the self-locking buckle, thereby locking the male and female end assemblies.

[0019] The above setup achieves the following effect: once the male and female assemblies are properly fitted together, the two assemblies are self-locked by the spring mechanism on the assemblies. This self-locking structure makes the assembled product more stable, and the spring pin will not automatically disengage.

[0020] Furthermore, the self-locking mechanism includes multiple sets of self-locking buckles and self-locking sliders symmetrically arranged on both sides of the male end fitting and the female end fitting in the width direction.

[0021] Furthermore, the self-locking mechanism includes four sets of self-locking buckles and self-locking sliders; Two sets of self-locking buckles and self-locking sliders are respectively provided on both sides of the male end assembly and the female end assembly in the width direction; and the two sets of self-locking buckles and self-locking sliders on the same side are symmetrically arranged.

[0022] Furthermore, the male end assembly has a self-locking clearance groove on its side wall that matches the shape of the self-locking buckle, which is used to accommodate the self-locking buckle when the male end assembly and the female end assembly are engaged.

[0023] Furthermore, the male end spring pin is detachably connected to the male end spring pin assembly cavity; The female end spring pin is detachably connected to the female end spring pin assembly cavity.

[0024] Furthermore, the male end spring pin is fixedly connected to the male end spring pin assembly cavity by screws; The female end spring pin is fixedly connected to the female end spring pin assembly cavity by screws.

[0025] Secondly, this utility model provides a charging device, including a fixing structure for a self-locking spring pin as described in the first aspect.

[0026] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: 1. In existing technologies, the spring pins are often exposed. Whether the spring pin accidentally hits another assembly or the assembly accidentally hits the spring pin, it will cause damage to the spring pin. However, this application hides both the male and female ends of the spring pin in the assembly, which can effectively reduce damage. 2. Existing technologies generally use a single set of spring pins. If any one of them malfunctions, the assembly cannot function properly. The new structure uses a double spring pin design, which effectively reduces the defect rate.

[0027] 3. Existing technologies have poor precision in fitting male and female assemblies, which can cause displacement of the spring pin even after assembly, making it prone to damage. This application effectively improves assembly precision, increases assembly speed, and reduces the spring pin damage rate by using guide posts and guide sleeves.

[0028] 4. The male and female assemblies of this application fix the male and female ends of the spring pin on the assembly, and then fix the assembly on different devices. When in use, the male and female ends of the assembly are put together to make good contact between the male and female ends of the spring pin. Then the male and female ends of the assembly have a self-locking function to prevent them from falling off or shifting. Attached Figure Description

[0029] Figure 1 This is a structural diagram of the male end assembly and the female end assembly of this utility model in their separate states. Figure 2 This is an exploded view of the fixed structure of this utility model; Figure 3 This is a detailed structural diagram of the male end assembly and the female end assembly of this utility model; Figure 4 This is a structural schematic diagram of the self-locking mechanism of this utility model.

[0030] In the diagram: 1. Male end assembly; 11. Male end spring pin assembly cavity; 12. Mounting hole; 13. Wire through hole; 14. Self-locking clearance groove; 15. Screw fixing hole; 16. Male end spring pin; 2. Female end assembly; 21. Female end spring pin mounting block; 22. Female end spring pin mounting cavity; 23. Guide post; 24. Guide sleeve; 25. Female end spring pin; 26. Female end mounting plate; 3. Self-locking mechanism; 31. Self-locking buckle; 311. Column; 312. Stop block; 32. Self-locking slider; 33. Screw; 34. Return spring; 35. Screw; 36. Protrusion. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0032] In the description of this embodiment, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this embodiment. Example 1

[0033] This embodiment provides a self-locking spring pin fixing structure, such as... Figure 1 As shown, it includes a male end assembly 1 and a female end assembly 2 that can be assembled relative to each other; The male end assembly 1 is recessed inward on one side relative to the female end assembly 2 to form an opening male end spring pin assembly cavity 11; a male end spring pin 16 is fixedly installed in the male end spring pin assembly cavity 11. The female end assembly 2 includes a female end mounting plate 26 and a female end mounting block mounted on the female end mounting plate 26; the shape of the female end mounting block is adapted to the male end spring pin assembly cavity 11 and can be embedded in the male end spring pin assembly cavity 11; the female end mounting block is recessed inward on the side opposite to the male end assembly 1 to form an opening for the female end spring pin 25 assembly cavity; a female end spring pin 25 is fixedly installed in the female end spring pin 25 assembly cavity. When the female end mounting block is embedded in the male end spring pin assembly cavity 11, the male end spring pin 16 and the female end spring pin 25 abut and communicate.

[0034] Implementation principle: By concealing the male and female end spring pins 25 into the specially shaped male end assembly 1 and female end assembly 2 respectively, the shape of these assemblies is compatible with fixing the spring pins. During assembly or use, the spring pins will not be directly touched, which can reduce the damage rate of the spring pins by 80%. At the same time, the female end mounting block and the male end spring pin assembly cavity 11 are fitted together to make the installation and fixation of the two more secure and less likely to fall off. Example 2

[0035] like Figure 1 and Figure 2 As shown, this embodiment provides a fixing structure for a self-locking spring pin, including a male end assembly 1 and a female end assembly 2 that can be assembled relative to each other; like Figure 3 As shown, the male end assembly 1 has an inwardly recessed male end spring pin assembly cavity 11 with an opening on one side relative to the female end assembly 2; a male end spring pin 16 is fixedly installed in the male end spring pin assembly cavity 11; the female end assembly 2 includes a female end mounting plate 26 and a female end mounting block mounted on the female end mounting plate 26; the shape of the female end mounting block is adapted to the male end spring pin assembly cavity 11 and can be embedded in the male end spring pin assembly cavity 11; the female end mounting block has an inwardly recessed female end spring pin 25 assembly cavity with an opening on one side relative to the male end assembly 1; a female end spring pin 25 is fixedly installed in the female end spring pin 25 assembly cavity; when the female end mounting block is embedded in the male end spring pin assembly cavity 11, the male end spring pin 16 and the female end spring pin 25 are in contact and connected.

[0036] By concealing the male and female spring pins 25 into the specially shaped male end assembly 1 and female end assembly 2 respectively, the shape of these assemblies is compatible with the fixed spring pins. During assembly or use, the spring pins will not be directly touched, which can reduce the damage rate of the spring pins by 80%. At the same time, the female end mounting block and the male end spring pin assembly cavity 11 are fitted together to make the installation and fixation of the two more secure and less likely to fall off.

[0037] Specifically, the male end assembly 1 is provided with at least two male end spring pin assembly cavities 11; the position and number of the female end mounting block correspond to the male end spring pin assembly cavities 11.

[0038] Existing structures typically use a single set of spring pins; if any one of them malfunctions, the assembly cannot function properly. A double-spring pin design significantly reduces the incidence of contact failure. This invention is also not limited to a double-spring pin design; it can employ more or fewer spring pins.

[0039] Specifically, each male end spring pin assembly cavity 11 is provided with a wire hole 13 for circuit connection.

[0040] Specifically, such as Figure 1 and Figure 2As shown, the female end assembly 2 is provided with guide posts 23; each guide post 23 is fitted with a guide sleeve 24; the male end assembly 1 is provided with mounting holes 12 corresponding to the shape and position of the guide sleeve 24; the mounting holes 12 can be fitted and connected with the guide sleeve 24.

[0041] The existing male and female assemblies have poor fitting accuracy. Even after assembly, the spring pin may still shift and be easily damaged. The guide post 23 and the special guide sleeve 24 enable fast installation and high precision. The guide sleeve 24 is installed on the guide post 23. If the guide sleeve 24 is used for a long time, it will inevitably wear down, resulting in increased gap and affecting the performance. In this case, the guide sleeve 24 can be replaced to reduce the overall cost.

[0042] The guide sleeve 24 can be made of POM material, which has high rigidity, high hardness, low coefficient of friction, good self-lubrication, and the addition of flame retardant can effectively prevent fire.

[0043] This invention uses an aluminum structure to manufacture the male end assembly 1 and the female end assembly 2. Aluminum is a lightweight, high-strength material that is easy to mold and inexpensive, making it significantly superior to plastic or sheet metal materials. The assemblies are designed with two guide pillars 23, which provide good guidance and fixation, effectively controlling misalignment, deformation, and other defects during modular assembly.

[0044] Specifically, the female end assembly 2 is provided with guide posts 23 on both sides in the length direction; The male end assembly 1 has mounting holes 12 on both sides of its length that correspond to the shape and position of the guide sleeve 24.

[0045] With guide posts 23 at both ends along the length, it is beneficial to improve assembly accuracy, facilitate the alignment of male and female assemblies, provide good guidance and fixation, and effectively control misalignment, deformation and other defects during modular assembly.

[0046] Specifically, the fixing structure also includes a self-locking mechanism 3, which is used to lock the male end assembly 1 and the female end assembly 2 together.

[0047] When in use, the male end assembly 1 and the female end assembly 2 are put together to ensure good contact between the male and female ends of the spring pin. The self-locking mechanism 3 can effectively prevent it from falling off or shifting, making the assembled product more stable and preventing the spring pin from automatically detaching.

[0048] Specifically, such as Figure 4 As shown, the self-locking mechanism 3 includes at least one set of self-locking buckles 31 and self-locking sliders 32 arranged opposite to each other; The self-locking buckle 31 is fixed on the female end assembly 2; the self-locking slider 32 is slidably disposed on the male end assembly 1, and can move closer to or further away from the self-locking buckle 31. The self-locking slider 32 is provided with a sliding long threaded hole, and the self-locking slider 32 is slidably connected to the outside of the male end assembly 1 by a screw 33 passing through the sliding long threaded hole; the outside of the male end assembly 1 is provided with a screw 33 fixing hole 15 for connection with the screw 33. Figure 2 As shown, a return spring 34 is provided between the self-locking slider 32 and the male end assembly 1; one end of the return spring 34 is connected to the male end assembly, and the other end is connected to the protrusion 36 provided on the outside of the male end assembly 1, thereby forming an elastic force.

[0049] The reset spring 34 can drive the self-locking slider 32 to slide closer to the self-locking buckle 31; The self-locking buckle 31 includes a column 311 fixed on the female end mounting plate 26 and a stop block 312 provided on the column 311; the distance between the bottom of the stop block 312 and the female end mounting plate 26 is greater than the height of the self-locking slider 32; the stop block 312 is provided with a ramp surface facing the self-locking slider 32. The self-locking slider 32 has a second slope surface opposite to the first slope surface on the side near the self-locking buckle 31; like Figure 4 As shown, when the male end assembly and the female end assembly are engaged, the first and second ramp surfaces cause the self-locking slider 32 to slide away from the self-locking buckle 31. When the self-locking slider 32 moves to the lower end of the stop block 312, the return spring 34 causes the self-locking slider 32 to slide close to the self-locking buckle 31, thereby locking the male end assembly 1 and the female end assembly 2.

[0050] Once the male end assembly 1 and the female end assembly 2 are properly fitted together, the two assemblies will be self-locked by the spring mechanism on the assemblies. The self-locking structure makes the assembled product more stable and prevents the spring pin from automatically disengaging.

[0051] Specifically, the self-locking mechanism 3 includes multiple sets of self-locking buckles 31 and self-locking sliders 32 symmetrically arranged on both sides of the male end assembly and the female end assembly in the width direction.

[0052] Specifically, the self-locking mechanism 3 includes four sets of self-locking buckles 31 and self-locking sliders 32; Two sets of self-locking buckles 31 and self-locking sliders 32 are respectively provided on both sides of the male end fitting and the female end fitting in the width direction; and the two sets of self-locking buckles 31 and self-locking sliders 32 located on the same side are symmetrically arranged.

[0053] Specifically, the male end assembly 1 has a self-locking clearance groove 14 on its side wall that is adapted to the shape of the self-locking buckle 31, which is used to accommodate the self-locking buckle 31 when the male end assembly and the female end assembly are engaged.

[0054] Specifically, the male end spring pin 16 is detachably connected to the male end spring pin assembly cavity 11; The female end spring pin 25 is detachably connected to the female end spring pin 25 assembly cavity.

[0055] Specifically, the male end spring pin 16 is fixedly connected to the male end spring pin assembly cavity 11 by screws 35; The female end spring pin 25 is fixedly connected to the female end spring pin 25 assembly cavity by screw 35.

[0056] This utility model manufactures a male end assembly 1 and a female end assembly 2 with special structure and materials. The male and female ends of the spring pin are fixed on the assembly, and the assembly is then fixed on different devices. When in use, the male and female ends of the assembly are put together to ensure good contact between the male and female ends of the spring pin. The male and female ends of the assembly have a self-locking function to prevent them from falling off or shifting. Example 3

[0057] This embodiment provides a charging device, including a fixing structure for a self-locking spring pin as in Embodiment 2.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0059] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A self-locking spring pin fixing structure, characterized in that, This includes male and female assemblies that can be assembled relative to each other; The male end assembly is recessed inward on one side relative to the female end assembly to form an opening male end spring pin assembly cavity; a male end spring pin is fixedly installed in the male end spring pin assembly cavity. The female end assembly includes a female end mounting plate and a female end mounting block mounted on the female end mounting plate; the shape of the female end mounting block is adapted to the male end spring pin assembly cavity and can be embedded in the male end spring pin assembly cavity; the female end mounting block is recessed inward on the side opposite to the male end assembly to form an opening for the female end spring pin assembly cavity; a female end spring pin is fixedly installed in the female end spring pin assembly cavity. When the female end mounting block is embedded in the male end spring pin assembly cavity, the male end spring pin and the female end spring pin are in contact and connected.

2. The fixing structure of the self-locking spring pin according to claim 1, characterized in that, The male end assembly is provided with at least two male end spring pin assembly cavities; The position and number of the female end mounting block correspond to the male end spring pin assembly cavity.

3. The fixing structure of the self-locking spring pin according to claim 1, characterized in that, The female end assembly is provided with guide posts; each guide post is fitted with a guide sleeve. The male end assembly is provided with mounting holes corresponding to the shape and position of the guide sleeve; the mounting holes can be fitted and connected with the guide sleeve.

4. The fixing structure of the self-locking spring pin according to claim 3, characterized in that, The female end assembly is provided with guide posts on both sides in the length direction; The male end assembly has mounting holes on both sides along its length that correspond to the shape and position of the guide sleeve.

5. The fixing structure of the self-locking spring pin according to claim 1, characterized in that, The fixing structure also includes a self-locking mechanism for locking the male end assembly and the female end assembly together.

6. The fixing structure of the self-locking spring pin according to claim 5, characterized in that, The self-locking mechanism includes at least one set of self-locking buckles and self-locking sliders arranged opposite to each other; The self-locking buckle is fixed on the female end assembly; the self-locking slider is slidably disposed on the male end assembly, and can move closer to or further away from the self-locking buckle. The self-locking slider is provided with a sliding long screw hole, and the self-locking slider is slidably connected to the outside of the male end assembly by a screw passing through the sliding long screw hole; a return spring is provided between the self-locking slider and the male end assembly; The reset spring can drive the self-locking slider to slide towards the self-locking buckle; The self-locking buckle includes a column fixed on the female end mounting plate and a stop block disposed on the column; the distance between the bottom of the stop block and the female end mounting plate is greater than the height of the self-locking slider; the stop block is provided with a ramp surface facing the self-locking slider. The self-locking slider has a second slope surface opposite to the first slope surface on the side near the self-locking buckle; When the male and female end assemblies are engaged, ramp one and ramp two cause the self-locking slider to slide away from the self-locking buckle. When the self-locking slider moves to the lower end of the stop, the return spring causes the self-locking slider to slide closer to the self-locking buckle, thereby locking the male and female end assemblies.

7. The fixing structure of the self-locking spring pin according to claim 6, characterized in that, The self-locking mechanism includes multiple sets of self-locking buckles and self-locking sliders symmetrically arranged on both sides of the male and female end fittings in the width direction.

8. The fixing structure of the self-locking spring pin according to claim 6, characterized in that, The male end assembly has a self-locking clearance groove on its side wall that is adapted to the shape of the self-locking buckle, which is used to accommodate the self-locking buckle when the male end assembly and the female end assembly are engaged.

9. The fixing structure of the self-locking spring pin according to claim 1, characterized in that, The male end spring pin is detachably connected to the male end spring pin assembly cavity; The female end spring pin is detachably connected to the female end spring pin assembly cavity.

10. A charging device, characterized in that, The fixing structure includes the self-locking spring pin as described in any one of claims 1-9.

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