An ear-hanging structure

Abstract

The utility model discloses a kind of lug structures, the structure includes lug main body and two bolt components;Lug main body includes connecting portion, placing part and limiting portion, placing part is located at the both ends of connecting portion, limiting portion is located at the inner wall top of placing part;Connecting portion is used for being contacted with guide rail, placing part is used for installing two bolt components, limiting portion is used for limiting bolt component;Bolt component includes bolt body, limiting arm, elastic cantilever and contact arm, limiting arm, elastic cantilever and contact arm are all set on bolt body;Limiting arm is used for being contacted with limiting portion;Elastic cantilever and contact arm are set at angle;When lug structure is installed on guide rail, elastic cantilever and the inner wall top of placing part are contacted, contact arm and guide rail are contacted, and elastic cantilever and contact arm generate relative force, and guide rail is clamped tightly.The utility model has strong versatility, can make lug structure firmly clamped on guide rail, ensure the safety and stability of electrical equipment installed on guide rail.

Description

Technical Field

[0001] This utility model relates to the field of mechanical structure technology, and in particular to a hanging ear structure. Background Technology

[0002] Guide rails are widely used support and fixing components in electrical systems, primarily used to provide stable and reliable support for wiring terminals, ensuring the stable operation of the electrical system. For example, C45 guide rails are stable and reliable, have low production costs, are easy to install and maintain, and have standardized dimensions. C45 guide rails are widely used in PLC electrical cabinets, distribution cabinets, and household main switch applications.

[0003] Currently, in applications requiring the integration of guide rails and various electrical equipment, mounting brackets are used to provide stable and high-strength support for the electrical equipment, ensuring a secure connection between the equipment and the guide rail. Existing mounting bracket structures for C45 guide rails have the following drawbacks: First, they only accommodate C45 guide rails of a single thickness, leading to loosening or inability to disassemble when installing C45 guide rails of different thicknesses; second, some mounting bracket structures require full assembly of extended functions before installation, resulting in complex operation and poor convenience; third, existing mounting bracket structures are complex, mostly made of plastic, have poor load-bearing capacity, and lack versatility.

[0004] In the process of realizing this utility model, the inventors discovered that the prior art has at least the following problems:

[0005] The existing mounting lug structures for C45 rails have poor adaptability, compatibility, and versatility. Utility Model Content

[0006] The purpose of this utility model is to provide an ear loop structure to solve the technical problems of poor adaptability, compatibility, and versatility of existing ear loop structures. The various technical effects of the preferred technical solutions provided by this utility model are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This utility model provides a hanging ear structure for fixing a device on a guide rail. The hanging ear structure includes: a hanging ear body and two pin assemblies.

[0009] The main body of the hanging ear includes a connecting part, a placement part, and a limiting part. The placement part is located at both ends of the connecting part, and the limiting part is located at the top of the inner wall of the placement part. The connecting part is used to contact the guide rail, the placement part is used to install two of the pin assemblies, and the limiting part is used to limit the pin assemblies.

[0010] The pin assembly includes a pin body, a limiting arm, an elastic cantilever, and a contact arm, all of which are disposed on the pin body. The limiting arm is used to contact the limiting part. The elastic cantilever and the contact arm are arranged at an angle. When the hanging ear structure is installed on the guide rail, the elastic cantilever contacts the top of the inner wall of the placement part, and the contact arm contacts the guide rail. The elastic cantilever and the contact arm generate a relative force to clamp the guide rail.

[0011] Optionally, the elastic cantilever includes a first elastic arm and a second elastic arm, and both the first elastic arm and the second elastic arm are provided with elastic protrusions at their ends.

[0012] Optionally, the elastic protrusion is configured to be arc-shaped.

[0013] Optionally, the surface of the contact arm that contacts the guide rail is provided with an inclined surface.

[0014] Optionally, the placement portion includes a first placement position and a second placement position, wherein the first placement position is disposed close to the connecting portion, and the second placement position is located outside the first placement position;

[0015] The limiting part is located on the top of the inner wall of the second placement position and is used to cooperate with the limiting arm to limit the pin assembly; the elastic cantilever and the contact arm are located in the first placement position and cooperate with the first placement position to clamp the guide rail.

[0016] Optionally, the limiting arm includes a forward limiting arm and a reverse limiting arm; the forward limiting arm includes a first forward arm and a second forward arm, and when the pin assembly is inserted into the hanging ear body to clamp the guide rail, the first forward arm and the second forward arm cooperate to clamp and limit the limiting part; when the pin assembly is pulled out of the hanging ear body, the reverse limiting arm abuts against the limiting part to limit it.

[0017] Optionally, the ear-mounted body further includes a mounting hole for connecting the device to the ear-mounted body.

[0018] Optionally, the angle between the elastic cantilever and the contact arm is in the range of 3° to 10°.

[0019] Optionally, the material of the ear loop body is aluminum alloy, titanium alloy or stainless steel.

[0020] Optionally, the material of the latch assembly is plastic.

[0021] Implementing one of the above-described technical solutions of this utility model has the following advantages or beneficial effects:

[0022] The hanging ear structure described in this utility model includes a hanging ear body and two pin assemblies. The pin assemblies can clamp the guide rail inside the hanging ear body, and the pin assemblies can adapt to different guide rail thicknesses under the interaction force of the elastic cantilever and the contact arm, which has strong versatility. At the same time, it can also make the hanging ear structure firmly attached to the guide rail, ensuring the safety and stability of the electrical equipment installed on the guide rail. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the ear-hanging body in an embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram of the pin structure in an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the hanging ear structure clamping the guide rail in an embodiment of this utility model;

[0028] Figure 5 This is a cross-sectional view of the guide rail clamped by the lug structure in this embodiment of the present invention;

[0029] Figure 6 This is a cross-sectional view of the ear-hook structure in an embodiment of this utility model when it is pulled out.

[0030] In the diagram: 1. Lug body; 11. Connecting part; 12. Placement part; 121. First placement position; 122. Second placement position; 13. Limiting part; 14. Mounting hole; 2. Pin assembly; 21. Pin body; 22. Limiting arm; 221. Forward limiting arm; 222. Reverse limiting arm; 23. Elastic cantilever; 231. First elastic arm; 232. Second elastic arm; 233. Elastic protrusion; 24. Contact arm; 241. Inclined surface; 25. Pin handle; 251. Shoulder; 3. Guide rail. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, various exemplary embodiments described below will be referenced to the accompanying drawings, which form part of the exemplary embodiments, illustrating various exemplary embodiments that may be adopted to implement this utility model. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. It should be understood that they are merely examples of processes, methods, and apparatuses consistent with some aspects of this utility model disclosed as detailed in the appended claims, and other embodiments may be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and spirit of this utility model.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the referred element must have a specific orientation, or be constructed and operated in a specific orientation. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. The term "multiple" means two or more. The terms "connected" and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, communication connections, direct connections, indirect connections through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more of the related listed items. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] To illustrate the technical solution described in this utility model, specific embodiments are described below, showing only the parts related to the embodiments of this utility model.

[0034] Example:

[0035] like Figures 1-6As shown, this utility model provides a hanging ear structure for fixing a device onto a guide rail 3. The hanging ear structure includes: a hanging ear body 1 and two pin assemblies 2; the hanging ear body 1 includes a connecting part 11, a placement part 12, and a limiting part 13. The placement part 12 is located at both ends of the connecting part 11, and the limiting part 13 is located at the top of the inner wall of the placement part 12; the connecting part 11 is used to contact the guide rail 3, the placement part 12 is used to install the two pin assemblies 2, and the limiting part 13 is used to limit the pin assemblies 2. The pin assembly 2 includes a pin body 21, a limiting arm 22, an elastic cantilever 23, and a contact arm 24. The limiting arm 22, the elastic cantilever 23, and the contact arm 24 are all mounted on the pin body 21. The elastic cantilever 23 and the contact arm 24 are arranged at an angle. When the hanging ear structure is installed on the guide rail 3, the elastic cantilever 23 contacts the top of the inner wall of the placement part 12, and the contact arm 24 contacts the guide rail 3. The elastic cantilever 23 and the contact arm 24 generate a relative force to clamp the guide rail 3.

[0036] Specifically, such as Figure 1 As shown, the ear-mounted structure includes an ear-mounted body 1 and two pin assemblies 2. (As indicated...) Figure 4 As shown, the ear-mounted body 1 serves as an intermediate component, used to connect the pin assembly 2 and the guide rail 3.

[0037] like Figure 2 As shown, the hook body 1 includes a connecting part 11, a placement part 12, and a limiting part 13. The connecting part 11 is the part that actually contacts the guide rail 3, used for placing the guide rail 3 and making contact with it. It should be noted that the lateral width of the connecting part 11 matches the width of the guide rail 3 to facilitate the subsequent connection between the guide rail 3 and the hook body 1. The placement part 12 is located on both sides of the connecting part 11 and is used for placing the two pin assemblies 2. A limiting part 13 is provided on the inner top of the connecting part 11. The limiting part 13 cooperates with the pin assembly 2 to limit the position of the pin assembly 2.

[0038] It should be noted that the main body 1 of the ear loop is symmetrically arranged and is a single integrated structure.

[0039] like Figure 3 As shown, the pin assembly 2 includes a pin body 21, a limiting arm 22, an elastic cantilever 23, and a contact arm 24, all of which are disposed on the pin body 21. In this embodiment, the pin assembly 2 includes two components, but only one will be used as an example in the following description.

[0040] The pin body 21 supports the limiting arm 22, the elastic cantilever 23, and the contact arm 24. The limiting arm 22 is located in the middle of the pin body 21 and contacts the limiting part 13 on the lug body 1. Cooperating with the limiting arm 22, the pin assembly 2 is limited. The elastic cantilever 23 is located in the front-middle part of the pin body 21, and the contact arm 24 is located at the very front of the pin body 21. As shown... Figure 3 As shown, the elastic cantilever 23 is disposed above the contact arm 24, and there is an angle between the elastic cantilever 23 and the contact arm 24.

[0041] It should be noted that the angle between the elastic cantilever 23 and the contact arm 24 is set to 3° to 10°. By limiting the angle between the elastic cantilever 23 and the contact arm 24, the clamping force can be controlled using the defined angle. The angle between the elastic cantilever 23 and the contact arm 24 allows the elastic cantilever 23 to adapt to different thicknesses of the guide rail 3 when an interaction force is generated between the elastic cantilever 23 and the contact arm 24, thus ensuring that the pin assembly 2 is securely engaged with the guide rail 3.

[0042] When the guide rail 3 is thin, the elastic cantilever 23, due to its angled design, has a certain elastic deformation space, allowing it to bend appropriately to fit the surface of the guide rail 3, ensuring tight contact between the contact arm 24 and the guide rail 3 and preventing the pin assembly 2 from loosening. When the guide rail 3 is thick, the angled design allows the elastic cantilever 23 to provide sufficient support, maintaining the stability of the pin assembly 2. This design not only improves the versatility of the lug structure, making it applicable to guide rails 3 of different thicknesses, but also enhances the connection strength between the lug structure and the guide rail 3, ensuring the safety and stability of the equipment. In this embodiment, the guide rail 3 can be selected as a C45 guide rail 3, and the thickness of the guide rail 3 is in the range of 1mm-1.4mm.

[0043] When the pin assembly 2 is located inside the placement part 12 and needs to clamp the guide rail 3 placed on the connecting part 11, the elastic cantilever 23 contacts the top of the inner wall of the placement part 12, and the contact arm 24 contacts the guide rail 3. A downward force is generated between the elastic cantilever 23 and the placement part 12, and an upward force is generated between the contact arm 24 and the guide rail 3. The elastic cantilever 23 and the contact arm 24 are set at an angle. The downward force and the upward force will cause the elastic cantilever 23 and the contact arm 24 to generate an interaction force, which will eventually cause the contact arm 24 to clamp the guide rail 3.

[0044] As an optional implementation method, such as Figure 3As shown, the elastic cantilever 23 includes a first elastic arm 231 and a second elastic arm 232, both of which have elastic protrusions 233 at their ends. Specifically, the first elastic arm 231 and the second elastic arm 232 are in contact with the placement part 12. The first elastic arm 231 and the second elastic arm 232 have the same structural shape. When the guide rail 3 needs to be pressed, both the first elastic arm 231 and the second elastic arm 232 can contact the inner top of the placement part 12, so that the elastic cantilever 23 can distribute the force more evenly when subjected to force, thereby improving the overall stability and reliability of the pin assembly 2.

[0045] Furthermore, both the first elastic arm 231 and the second elastic arm 232 are provided with elastic protrusions 233 at their ends. Specifically, when the elastic cantilever 23 contacts the top of the inner wall of the placement part 12, the elastic protrusions 233 can provide additional frictional force, enhancing the stability of the contact. At the same time, when the contact arm 24 contacts the guide rail 3 and generates an upward force, the elastic protrusions 233 can increase the contact area, disperse stress, and prevent damage caused by excessive local pressure. In addition, the elastic protrusions 233 can also play a buffering role to a certain extent, reducing the impact on the pin assembly 2 during the clamping process.

[0046] It should be noted that, as Figure 3 As shown, the elastic protrusion 233 is configured as an arc shape. Specifically, configuring the elastic protrusion 233 as an arc shape allows it to fit more closely to the top of the inner wall of the placement part 12, improving the uniformity and stability of the contact and further optimizing the stress distribution. Simultaneously, the arc-shaped protrusion can better conform to the shape of the contact surface under stress, avoiding stress concentration, reducing the risk of wear and damage, and providing better buffering and adaptation when facing external forces, further improving the durability and reliability of the pin assembly 2.

[0047] As an optional implementation method, such as Figure 3 As shown, a slope 241 is provided on the surface of the contact arm 24 that contacts the guide rail 3. Specifically, the contact arm 24 contacts the guide rail 3. The slope 241 on the contact arm 24 optimizes the contact effect between the contact arm 24 and the guide rail 3. When the contact arm 24 contacts the guide rail 3, the slope 241 guides the two to gradually fit together, reducing the impact caused by sudden contact, improving the flexibility and adaptability of the contact, and ensuring the clamping effect of the pin assembly 2 on the guide rail 3. At the same time, the slope 241 can also increase the contact area to a certain extent, making the stress distribution more uniform. It should be noted that when the contact arm 24 contacts the guide rail 3, the bottom surface of the contact arm 24 will contact the guide rail 3.

[0048] As an optional implementation method, such as Figure 2As shown, the placement part 12 includes a first placement position 121 and a second placement position 122. The first placement position 121 is disposed near the connecting part 11, and the second placement position 122 is located outside the first placement position 121. The limiting part 13 is located at the top of the inner wall of the second placement position 122 and is used to cooperate with the limiting arm 22 to limit the pin assembly 2. The elastic cantilever 23 and the contact arm 24 are located inside the first placement position 121 and cooperate with the first placement position 121 to clamp the guide rail 3.

[0049] Specifically, there are two placement portions 12, which are respectively disposed on both sides of the connecting portion 11. In this embodiment, one of the placement portions 12 will be used for description. The placement portion 12 includes a first placement position 121 and a second placement position 122. The first placement position 121 is disposed close to the connecting portion 11, and the second placement position 122 is located outside the first placement position 121.

[0050] like Figure 4 As shown, within the first placement position 121, the elastic cantilever 23 and the contact arm 24 cooperate to clamp the guide rail 3. Both the elastic cantilever 23 and the contact arm 24 have a certain elastic deformation capacity, enabling them to deform under external force, thereby establishing close contact with the guide rail 3 and enhancing the clamping effect. Simultaneously, the deformation of the elastic cantilever 23 and the contact arm 24 also provides some buffering for the guide rail 3, reducing vibration caused by external impact.

[0051] like Figure 5 As shown, in the second placement position 122, when the pin assembly 2 needs to clamp the guide rail 3, the cooperation between the limiting part 13 and the limiting arm 22 ensures the stability of the pin assembly 2 in the predetermined position, preventing it from moving or falling off. Furthermore, the arrangement of the first placement position 121 and the second placement position 122 optimizes the installation and removal process of the pin assembly 2, making the operation simpler and faster.

[0052] As an optional implementation method, such as Figure 3 As shown, the limiting arm 22 includes a forward limiting arm 221 and a reverse limiting arm 222; the forward limiting arm 221 includes a first forward arm and a second forward arm. When the pin assembly 2 is inserted into the lug body 1 to clamp the guide rail 3, the first forward arm and the second forward arm cooperate with each other to clamp and limit the limiting part 13 on different sides; when the pin assembly 2 is pulled out of the lug body 1, the reverse limiting arm 222 abuts against the limiting part 13 to limit it.

[0053] Specifically, such as Figure 3As shown, the forward limiting arm 221 and the reverse limiting arm 222 are oriented opposite to each other. The forward limiting arm 221 is positioned in the direction in which the pin assembly 2 is inserted into the ear body 1, while the reverse limiting arm 222 is positioned in the direction in which the pin assembly 2 is pulled out of the ear body 1. The forward limiting arm 221 and the reverse limiting arm 222 are configured to effectively limit the pin assembly 2 during insertion and removal, thereby improving the stability of the pin assembly 2 in the ear body 1.

[0054] like Figure 5 As shown, when the pin assembly 2 is inserted along the direction of the forward limiting arm 221, the first and second forward arms will gradually contact the limiting part 13 and produce a clamping effect, ensuring that the pin assembly 2 can accurately reach the predetermined position. Figure 6 As shown, when the pin assembly 2 needs to be pulled out, the reverse limiting arm 222 will abut against the limiting part 13 to block it and prevent the pin assembly 2 from suddenly falling off or moving, thereby ensuring the safety and stability of the hanging ear structure.

[0055] As an optional implementation, the end of the pin body 21 is provided with a pin handle 25, which facilitates the insertion or removal of the pin assembly 2. When the pin assembly 2 is inserted, the shoulder 251 of the pin handle 25 will press against the lug body 1, making it easier for the operator to determine whether the pin assembly 2 has reached the clamping position.

[0056] As an optional implementation method, such as Figure 2 As shown, the main body 1 of the hanging ear also includes mounting holes 14, which are used to connect the device to the main body 1 of the hanging ear. Specifically, the mounting holes 14 allow other devices or structures (such as electrical equipment) to be securely installed on the main body 1 of the hanging ear, ensuring overall stability and reliability. During installation, other devices or structures can be connected to the main body 1 of the hanging ear using bolts, nuts, or other fasteners through the mounting holes 14. This connection method is simple and effective and can withstand greater external forces. In addition, the position and number of mounting holes 14 can be designed according to actual needs to meet the installation requirements in different scenarios, further improving the flexibility and applicability of the hanging ear structure. In this embodiment, four mounting holes 14 are optionally provided, and all four mounting holes 14 are located on the connecting part 11.

[0057] As an optional implementation, the material of the ear-shaped body 1 can be aluminum alloy, titanium alloy, or stainless steel. Specifically, in this embodiment, the material of the ear-shaped body 1 is preferably aluminum alloy. Aluminum alloy not only ensures the strength and durability of the ear-shaped body 1, but also gives it good corrosion resistance, making it suitable for various complex operating environments. In addition, aluminum alloy is relatively lightweight, which helps to reduce the overall weight of the entire device, facilitating handling and installation. At the same time, aluminum alloy is easy to process and form, which can meet the needs of the complex structural design of the ear-shaped body 1, ensuring precise fit between components, thereby further improving the stability and reliability of the device.

[0058] As an optional implementation, the pin assembly 2 is made of plastic. Specifically, choosing plastic for the pin assembly 2 offers several advantages. First, plastic possesses good flexibility and elasticity, allowing the pin assembly 2 to better adapt to various deformations during installation and use, reducing damage caused by stress concentration. Second, plastic has excellent insulation properties, which is particularly important for the mounting lug structure of electrical equipment, effectively preventing safety hazards such as current leakage or short circuits. Furthermore, the lightweight nature of plastic helps reduce the overall weight of the mounting lug structure, making handling and installation more convenient. Simultaneously, the relatively low cost of plastic helps reduce production costs and improve the product's market competitiveness. Finally, plastic is easy to process and mold, meeting the requirements of the complex structural design of the pin assembly 2, ensuring precise fit with the mounting lug body 1 and other components, thereby improving the overall stability and reliability of the mounting lug structure.

[0059] The hanging ear structure described in this embodiment includes a hanging ear body 1 and two pin assemblies 2. The pin assemblies 2 can clamp the guide rail 3 inside the hanging ear body 1. Under the interaction force of the elastic cantilever 23 and the contact arm 24, the pin assemblies 2 can adapt to different guide rail 3 thicknesses, which is highly versatile. At the same time, it can also make the hanging ear structure firmly attached to the guide rail 3, ensuring the safety and stability of the electrical equipment installed on the guide rail 3.

[0060] In this embodiment, when installing electrical equipment on the guide rail 3, the number of corresponding hanging lug structures can be set according to the size of the electrical equipment to ensure the stability of the electrical equipment installation on the guide rail 3.

[0061] The embodiment is merely a special case and does not indicate that this utility model is implemented in such a way.

[0062] The above description is merely a preferred embodiment of the present utility model. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present utility model. Furthermore, under the teachings of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present utility model.

Claims

1. A hook structure, characterized in that, The ear structure is used to fix the device on the guide rail (3), and includes: an ear body (1) and two pin assemblies (2); The main body (1) of the ear loop includes a connecting part (11), a placement part (12) and a limiting part (13). The placement part (12) is located at both ends of the connecting part (11), and the limiting part (13) is located at the top of the inner wall of the placement part (12). The connecting part (11) is used to contact the guide rail (3), the placement part (12) is used to install two of the pin assemblies (2), and the limiting part (13) is used to limit the pin assemblies (2). The pin assembly (2) includes a pin body (21), a limiting arm (22), an elastic cantilever (23), and a contact arm (24). The limiting arm (22), the elastic cantilever (23), and the contact arm (24) are all disposed on the pin body (21). The limiting arm (22) is used to contact the limiting part (13). The elastic cantilever (23) and the contact arm (24) are arranged at an angle. When the hanging ear structure is installed on the guide rail (3), the elastic cantilever (23) contacts the top of the inner wall of the placement part (12), and the contact arm (24) contacts the guide rail (3). The elastic cantilever (23) and the contact arm (24) generate a relative force to clamp the guide rail (3).

2. The ear-hook structure according to claim 1, characterized in that, The elastic cantilever (23) includes a first elastic arm (231) and a second elastic arm (232), and the ends of the first elastic arm (231) and the second elastic arm (232) are provided with elastic protrusions (233).

3. The ear-hook structure according to claim 2, characterized in that, The elastic protrusion (233) is configured as an arc shape.

4. The ear-hook structure according to claim 1, characterized in that, The contact arm (24) has an inclined surface (241) on the surface that contacts the guide rail (3).

5. The ear-hook structure according to claim 1, characterized in that, The placement part (12) includes a first placement position (121) and a second placement position (122). The first placement position (121) is disposed close to the connecting part (11), and the second placement position (122) is located outside the first placement position (121). The limiting part (13) is located on the top of the inner wall of the second placement position (122) and is used to cooperate with the limiting arm (22) to limit the pin assembly (2); the elastic cantilever (23) and the contact arm (24) are located in the first placement position (121) and cooperate with the first placement position (121) to clamp the guide rail (3).

6. The ear-hook structure according to claim 1, characterized in that, The limiting arm (22) includes a forward limiting arm (221) and a reverse limiting arm (222); the forward limiting arm (221) includes a first forward arm and a second forward arm. When the pin assembly (2) is inserted into the ear body (1) and clamps the guide rail (3), the first forward arm and the second forward arm cooperate to clamp and limit the limiting part (13); when the pin assembly (2) is pulled out of the ear body (1), the reverse limiting arm (222) abuts against the limiting part (13) to limit it.

7. The ear-hanging structure according to claim 1, characterized in that, The ear loop body (1) also includes a mounting hole (14) for connecting the device to the ear loop body (1).

8. The ear-hanging structure according to claim 1, characterized in that, The angle between the elastic cantilever (23) and the contact arm (24) is in the range of 3° to 10°.

9. The ear-hanging structure according to claim 1, characterized in that, The material of the ear loop body (1) is aluminum alloy, titanium alloy or stainless steel.

10. The ear-hanging structure according to claim 1, characterized in that, The material of the latch assembly (2) is plastic.

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