Buckle for unthreaded hole

Abstract

The utility model relates to a buckle for an unthreaded hole, which comprises a connector clip which is of a columnar structure, can be inserted into the unthreaded hole formed in a mounting plate and is in interference fit with the unthreaded hole; and the clamping piece is detachably clamped on the inserting piece, and the clamping piece is clamped in the unthreaded hole through pre-tightening force by utilizing at least one elastic piece and a clamping head, so that the pulling-out force is increased. The buckle is compact and reasonable in structure and convenient to operate, and the connecting effect of the buckle body and the unthreaded hole is remarkably improved in multiple modes of multiple clamping mechanisms, structural design optimization, pullout force increase and the like. Under the combined action of the supporting part of the plug connector and the clamping head of the clamping connector, stable and reliable clamping is realized; the round end face and the side face of the connecting plug are closed up, and the supporting parts are annularly distributed at equal intervals and extend, so that the resistance during insertion is reduced, and the mounting convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of buckles, in particular to a buckle used for a light hole. Background Art

[0002] In automotive manufacturing and for connecting metal mounting plates, snap-on connections are highly favored for their convenience and reliability. However, traditional connectors face significant challenges when it comes to snapping into bare holes (i.e., mounting holes with smooth, unthreaded interiors). The core issue is that the smooth interior walls result in a single connection point, resulting in poor fixing. This can easily lead to loosening or even falling off during vehicle operation, severely compromising the stability and precision of the connection.

[0003] Specifically, traditional clip-on connectors often experience gap clearance in open-hole connections, leading to skew or loose connections. Furthermore, ensuring a secure connection often requires a high insertion force, which not only increases installation difficulty but can also damage components. Furthermore, to prevent the connection from falling off, a high extraction force is required, further increasing the complexity of the connection and the demands placed on component strength.

[0004] Although various improvement schemes have been proposed in the prior art, they are often difficult to be widely used due to their complex structure, cumbersome operation and high cost. Therefore, for optical hole connection, a new type of clamping member and its connection method are urgently needed to overcome the inherent defects of the traditional method.

[0005] For this purpose, we propose a buckle for light holes. Utility Model Content

[0006] To address the shortcomings of the aforementioned existing production technology, the applicant has provided a clip for a light hole. This clip significantly improves the connection between the clip body and the light hole through multiple snap-fit mechanisms, optimized structural design, and increased extraction force. The support portion of the plug-in connector and the snap-fit connector work together to achieve a stable and reliable snap connection.

[0007] The technical solutions adopted in this utility model are as follows:

[0008] A buckle for a light hole, comprising:

[0009] The plug-in connector has a columnar structure and can be inserted into the light hole opened in the mounting plate and has an interference fit with the light hole;

[0010] The clamping piece is detachably clamped on the plug-in piece. The clamping piece utilizes at least one elastic piece and a clamping joint and is clamped in the light hole through a pre-tightening force to increase the pulling force.

[0011] Furthermore, the connector includes a plug post and a plug connector. The plug connector is located at the bottom of the plug post, and its end face is rounded and the side is closed to facilitate docking with the light hole and eliminate airflow.

[0012] Furthermore, the connector also includes a support portion, which is located on the side wall of the connector column near one end of the suction cup. There are at least two support portions, which are equidistantly distributed in a ring. The support portions extend radially outward and are interference-connected with the light hole.

[0013] Furthermore, the plug-in connector also includes a clamping portion and a clamping block. The clamping portion is an installation groove opened on the support portion, which is used to provide an installation space for the clamping connector; the clamping block is connected to both sides of the clamping portion, is in the shape of a triangular prism, and facilitates the insertion and locking of the clamping connector.

[0014] Furthermore, the clamping member includes a clamping sleeve, which is U-shaped and covers the clamping part of the plug-in member. The clamping sleeve is provided with a clamping interface corresponding to the clamping block of the plug-in member to achieve clamping fit.

[0015] Furthermore, the clamping member includes at least two clamping joints, and the ends of the clamping joints are connected with triangular spikes.

[0016] Furthermore, when the number of the card connectors is set to two, both of the card connectors adopt the structure of card connector one, and the two card connectors one are symmetrically distributed on both sides of the card connector sleeve. When the snap body is pulled out, the two card connectors one can be snapped onto the inner wall of the light hole.

[0017] Furthermore, when the number of the clamping joints is set to three, the clamping component further includes a second clamping joint, which is located on the same side as the two first clamping joints and is smaller in size to increase the clamping force.

[0018] Furthermore, a spring piece is provided on one side of the card joint of the card connector close to the card sleeve. When the card joint moves into the light hole, the spring piece contracts toward the plug-in column and provides an elastic force toward the light hole.

[0019] Furthermore, the clamping member and the mounting plate are both made of metal, and the hardness of the clamping member is greater than that of the mounting plate.

[0020] The beneficial effects of the utility model are as follows:

[0021] The present utility model has a compact and reasonable structure and is easy to operate. It significantly improves the connection effect between the clip body and the light hole through multiple clamping mechanisms, optimized structural design, and increased pull-out force. Under the joint action of the support part of the plug connector and the clamping joint of the clamping part, a stable and reliable clamping is achieved; the circular end face and side closing design of the plug connector, as well as the annular equidistant distribution and extension design of the support part, reduce the resistance during insertion and improve the convenience of installation; the metal material of the clamping part, the number and layout of the clamping joints, and the addition of spikes significantly increase the pull-out force and ensure the long-lasting stability of the connection. At the same time, the adsorption effect of the suction cup and the slightly negative pressure state of the exhaust hole also provide additional guarantees for the stability of the connection. In summary, the light hole locking clip in this embodiment has the characteristics of excellent connection effect, small insertion force, large pull-out force, etc., and is suitable for application scenarios such as automobiles that require high stability and safety.

[0022] At the same time, the utility model also has the following advantages:

[0023] The multiple-clamp mechanism significantly improves connection stability. The light hole locking clip in this embodiment utilizes an interference fit between the connector's support and the light hole, and a tight engagement between the connector's snap-on connector and the inner wall of the light hole, creating a multiple-clamp mechanism. This design not only increases the contact area between the clip body and the light hole, but also significantly improves the stability and reliability of the connection through friction, elastic force, and spike insertion. Even in the intense vibration environment generated by high-speed vehicle driving, the risk of disengagement can be effectively avoided, ensuring the overall safety and reliability of the vehicle.

[0024] The optimized structural design reduces insertion force and improves installation convenience. The connector's plug-in head features a rounded end face and side tapers, making the insertion process smoother and automatically adjusting its alignment with the light hole, reducing installation errors. Furthermore, the equidistant and extended annular support structure, along with the elastic contraction of the connector's spring clip, combine to reduce insertion resistance, making installation easier and more convenient. This design not only improves installation efficiency but also reduces the skill requirements for installers, facilitating widespread adoption.

[0025] Increased extraction force ensures a long-lasting and stable connection. The metal material used for the connector, the number and layout of the connectors, and the addition of spikes significantly increase the extraction force of the clip body. During extraction, the connector's springs tightly embed into the inner wall of the aperture, while the spikes further increase friction, requiring greater force. This design effectively prevents the clip from accidentally falling out due to vibration or external forces, ensuring a long-lasting and stable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the present utility model.

[0027] Figure 2 This is an exploded view of the present invention.

[0028] Figure 3 This is a structural diagram of another type of clamping member in the present invention.

[0029] Figure 4 This is a schematic diagram of the utility model in working state.

[0030] in:

[0031] 10. Buckle body; 20. Mounting plate; 30. Light hole;

[0032] 100, plug connector; 200, snap connector; 300, suction cup; 400, docking unit;

[0033] 101. Connecting post; 102. Connecting connector; 103. Supporting portion; 104. Connecting portion; 105. Block;

[0034] 201, card sleeve; 202, spring piece; 203, card connector 1; 203', card connector 2; 204, card interface;

[0035] 301. Exhaust hole. DETAILED DESCRIPTION

[0036] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0037] like Figure 1-Figure 4 As shown, this embodiment discloses a clip for a light hole. It connects to a light hole 30 in a vehicle mounting plate 20 and provides space for other components (such as a wiring harness) to be installed. The clip body 10 in this embodiment utilizes a specially designed structure that fits tightly against the inner wall of the light hole 30. Even under the intense vibrations generated by high-speed vehicle driving, it maintains a stable engagement, effectively preventing the risk of disengagement and thereby improving the overall safety and reliability of the vehicle.

[0038] The buckle body 10 in this embodiment includes a plug-in connector 100, a clamping connector 200, a suction cup 300, and a docking member 400. The plug-in connector 100, suction cup 300, and docking member 400 are molded using an advanced integrated injection molding process, ensuring seamless connections between the components and overall structural strength. This design not only improves product durability but also simplifies the production process and reduces manufacturing costs. The clamping connector 200 utilizes at least one spring 202 and a clamping joint to engage within the light hole 30 through a preload force.

[0039] The connector 100 is made of plastic or rubber, which not only has good flexibility and wear resistance, but also can absorb vibration and reduce noise to a certain extent.

[0040] like Figure 2 As shown, the plug post 101 in this embodiment serves as the main structure of the connector 100, and its design fully considers the balance between mechanical performance and installation convenience. The plug connector 102 has a rounded end face and narrowed sides (i.e., the diameter of the plug connector 102 decreases toward the outside), which not only makes the plugging process smoother but also automatically adjusts its alignment with the light hole 30 during installation, reducing installation errors. Furthermore, when the plug connector 102 is inserted into the light hole 30, it can quickly expel air from the hole, further enhancing the tightness of the connection.

[0041] In actual use, after the clamping member 200 is fixed to the plug connector 100 , as long as the extended range of the clamping member 200 is larger than the diameter of the light hole 30 , the installation and fastening effect can be achieved.

[0042] However, in order to improve the fastening effect, the diameter of the plug connector 102 and the inner diameter of the light hole 30 need to be adapted and connected, and the spacing value between the two after installation should be less than 30% of the diameter of the light hole 30. That is, when the spacing value between the two after installation is greater than 30% of the diameter of the light hole 30, it is necessary to replace the clip with a more suitable size to improve the subsequent clipping effect.

[0043] In this embodiment, the light hole 30 is usually circular, and in special cases it is elliptical or other special-shaped structures, and the snap connection can also be achieved through the snap assembly in this embodiment.

[0044] The number of support portions 103 in this embodiment is at least two, and at least two support portions 103 are equidistantly distributed in a ring on the side wall of the plug-in column 101, ensuring stable support of the snap body 10 in the light hole 30. The design of the support portion 103 extending radially outward not only increases the contact area with the inner wall of the light hole 30, but also generates sufficient friction through the interference fit, so that the snap body 10 can be firmly fixed on the mounting plate and remain stationary even under strong vibration or impact. In addition, the extended design of the support portion 103 also prevents the snap body 10 from shaking, ensuring the stability and reliability of the connection. This design is particularly important in applications such as automobiles that require high stability and safety. It can effectively avoid problems such as noise, wear and even falling off caused by shaking of the connecting parts, thereby improving the safety and service life of the entire system.

[0045] In this embodiment, there are two supporting portions 103 , and the two supporting portions 103 are located on the same plane and are fixedly connected to the outer wall of the plug-in column 101 and the light hole 30 .

[0046] like Figure 2As shown, the clamping portion 104 in this embodiment serves as a connecting bridge between the plug-in connector 100 and the clamping member 200, and its design is directly related to the performance and reliability of the entire locking buckle. The provision of the mounting slot not only provides sufficient installation space for the clamping member 200, but also ensures the smooth progress of the clamping process. The design of the clamping block 105 is even more ingenious. Its triangular prism-shaped structure not only increases the contact area with the clamping member 200, but also, through its special protruding height design, enables easy insertion and secure locking of the clamping member 200. When the clamping member 200 is inserted into the clamping portion 104, the inclined surface of the clamping block 105 guides the clamping member 200 to enter smoothly, and after reaching the predetermined position, it tightly locks the clamping member 200 through elastic deformation to prevent it from falling off.

[0047] like Figure 2 and Figure 3 As shown, the clamping member 200 is made of metal, which can improve the elastic force and the clamping force. The specific metal should be selected according to the size of the insertion and extraction force, mainly the hardness of the metal. If the metal hardness of the clamping member 200 is greater than the hardness of the mounting plate 20, the clamping effect is better and the extraction force is greater, but scratches may be left in the light hole 30.

[0048] If the hardness of the selected metal is lower than that of the mounting plate 20, scratches will not easily occur, but the extraction force will be smaller. Therefore, the material of the clamping member 200 is determined according to the material of the mounting plate 20. In addition, the rigidity also needs to be adjusted. If the rigidity is too high, the clamping force will be greater and the extraction force will also be greater. If the rigidity is too low, the clamping force will be smaller and the extraction force will be relatively smaller.

[0049] Preferably, the material of the clip 200 is the same as that of the mounting plate 20. This choice ensures that it has sufficient strength and rigidity when subjected to external forces, thereby effectively resisting the stress during extraction. The clip 200 is not only clipped and fixed to the plug-in connector 100 to form a stable connection as a whole, but also its unique clip design can tightly clip to the inner wall of the light hole 30 when the clip body 10 is pulled out, significantly increasing the extraction force of the clip body 10. This design effectively prevents the clip from accidentally falling off due to vibration or external force by increasing the resistance during extraction, thereby improving the safety and reliability of the connection. The material selection of the clip 200 also takes into account its good corrosion resistance and wear resistance, and can maintain stable performance during long-term use, thereby extending the service life of the clip.

[0050] Specifically, such as Figure 2 and Figure 3As shown, the clamping member 200 in this embodiment includes an integrally formed clamping sleeve 201, a spring 202, a clamping connector 203, and a clamping interface 204. This integrated design simplifies the installation process, reduces gaps between components, and improves overall stability. The clamping sleeve 201 is U-shaped and covers the clamping portion 104. Its shape not only facilitates a close fit with the clamping portion 104 of the plug connector 100, but also, by providing two clamping interfaces 204 corresponding to the clamping block 105, achieves a precise clamping fit between the clamping block 105 and the clamping interfaces 204. This clamping method not only ensures a secure radial connection between the clamping member 200 and the plug connector 100, but also effectively constrains the clamping member 200 in the axial direction by limiting the inner diameter of the optical hole 30, thereby ensuring the stability and reliability of the entire clip body 10 after installation. The U-shaped design of the clamping sleeve 201 also facilitates fine-tuning during installation to ensure optimal fit between the clamping member 200 and the plug connector 100. At the same time, the opening position and size of the card interface 204 are carefully designed to ensure a close fit with the card block 105 to avoid loosening or falling off during use.

[0051] In this embodiment, the upper end of the snap sleeve 201 is connected to at least two snap connectors. This design increases the contact area between the snap connector 200 and the inner wall of the aperture 30, improving the stability of the snap connection and the extraction force. When there are two snap connectors, they adopt the structure of snap connector 1 203. They are symmetrically arranged on both sides of the snap sleeve 201, evenly distributing the stress during extraction and preventing damage to the clip body 10 due to uneven force.

[0052] like Figure 3 As shown, in another embodiment, the number of the card connectors is increased to three, including two symmetrically arranged card connectors 203 and one card connector 203' located on the same side of the two card connectors.

[0053] Although the size of the second clamping joint 203' is smaller in this design, this is because both the first clamping joint 203 and the second clamping joint 203' are arranged on the same clamping sleeve 201, and the clamping sleeve 201 is formed by cutting and bending a whole plate. Therefore, after the two first clamping joints 203 are processed and formed into a staple, the remaining position can only form the smaller second clamping joint 203'. Although the second clamping joint 203' is smaller in size, it is located in different directions of the two first clamping joints 203, so it can form a more comprehensive clamping effect, further improving the clamping force. The number and layout of the clamping joints can be flexibly adjusted according to the specific installation requirements and the size of the light hole 30 to meet the usage requirements in different scenarios. At the same time, the shape and size of the first clamping joint 203 and the second clamping joint 203' are also optimized to ensure that they can be tightly clamped to the inner wall of the light hole 30 to provide sufficient extraction force.

[0054] In this embodiment, a spring clip 202 is provided on the side of the connector near the connector sleeve 201. This design cleverly utilizes the elastic properties of the material. When the connector moves into the light hole 30, the spring clip 202 contracts toward the plug post 101, thereby not causing significant insertion force during insertion, while also generating an elastic force toward the light hole 30. This design not only prevents the snap body 10 from shaking during installation, but also allows the connector to be more tightly embedded in the inner wall of the light hole 30 when removed, thereby significantly improving the removal force and enhancing installation stability. The design of the spring clip 202 also takes into account the deformation of the connector 200 during installation. By properly controlling the bending degree and elastic modulus of the spring clip 202, it can be ensured that the connector 200 can be smoothly inserted into the light hole 30 during installation while providing sufficient resistance during removal to prevent accidental disengagement.

[0055] The triangular spikes attached to the snap connector in this embodiment further enhance the snap-fitting effect. This spike design can increase the friction between the snap connector and the inner wall of the light hole 30, making the snap-fitting more secure. At the same time, the triangular shape ensures that the spikes can better embed into the inner wall of the light hole 30 during extraction, providing greater extraction force. The design of the spikes also takes into account the issue of damage to the inner wall of the light hole 30. By properly controlling the size and shape of the spikes, it can be ensured that while providing sufficient extraction force, it will not cause serious damage or scratches to the inner wall of the light hole 30.

[0056] like Figure 1 and Figure 2 As shown, the suction cup 300 in this embodiment is on the same plane as the mounting plate 20. This design allows the suction cup 300 to fit tightly against the side wall of the mounting plate 20, thereby further improving the installation force. Since the mounting plate 20 is usually made of metal and has a smooth surface, the suction cup 300 can utilize its adsorption characteristics to firmly adsorb on the mounting plate 20 after the connector 100 is inserted into the light hole 30, thereby preventing the buckle body 10 from shaking or falling off. The material and size of the suction cup 300 have also been carefully designed to ensure that it has good adsorption performance and durability. At the same time, the contact surface between the suction cup 300 and the mounting plate 20 has also been specially treated to improve its adsorption effect and stability.

[0057] The vent 301, located on the end surface of the suction cup 300 opposite the aperture 30, and the one-way valve therein, provide an effective air vent for the blind aperture 30. When the connector 100 is inserted, the vent 301 quickly squeezes out excess air, preventing pressure resistance and facilitating a smoother insertion process. Furthermore, the suction device removes excess air, and combined with the sealing effect of the suction cup 300, creates a slightly negative pressure within the aperture 30, further enhancing the connection.

[0058] The docking piece 400 is connected to the suction cup 300. This design not only facilitates connection and installation with other component wiring harnesses via cable ties, but also effectively seals the vent 301. The docking piece 400's position corresponds to the vent 301. When connected to the other components, it tightly seals the vent 301, preventing even minor air leaks. This maintains a slight negative pressure within the optical hole 30, ensuring a long-lasting and stable connection.

[0059] like Figure 1-Figure 4 As shown, the working principle of this embodiment is as follows:

[0060] First, the snap-fit sleeve 201 covers the snap-fit portion 104 and precisely engages with the snap-fit block 105 via the snap-fit interface 204, ensuring a secure radial connection between the snap-fit component 200 and the plug-in connector 100. Furthermore, the number and layout of the snap-fit connectors can be flexibly adjusted based on the installation requirements and the size of the optical aperture 30 to ensure a tight fit on the inner wall of the optical aperture 30 and provide sufficient extraction force.

[0061] Then align the clip body 10 with the light hole 30 for plugging. Since the diameter of the plug post 101 is adapted to the inner diameter of the light hole 30, the smoothness and tightness of the plugging process are ensured. The end face of the plug connector 102 is circular and the side is closed, which is not only convenient for insertion into the light hole 30, but also can automatically adjust the alignment during the installation process to reduce installation errors. At the same time, the support parts 103 are distributed equidistantly on the side walls of the plug post 101 in a circular manner, and generate sufficient friction with the inner wall of the light hole 30 through interference fit to ensure that the clip body 10 can be firmly fixed on the mounting plate and can remain stationary even under strong vibration or impact. At the same time, when installing in a blind hole, the plug post 101 can squeeze out excess air in the blind hole light hole 30 during the downward plugging process;

[0062] The suction cup 300 is flush with the mounting plate 20, allowing it to fit snugly against the sidewalls of the mounting plate 20, further enhancing the mounting force. The vent hole 301 and one-way valve provide an effective venting channel for the blind hole's aperture 30, ensuring a smooth insertion process. The suction device also creates a slight negative pressure within the aperture 30, further enhancing the snap-in effect.

[0063] Finally, the docking piece 400 facilitates connection and installation with other component harnesses via cable ties.

[0064] The present utility model has a compact and reasonable structure and is easy to operate. It significantly improves the connection effect between the clip body 10 and the light hole 30 through multiple snap-on mechanisms, optimized structural design, and increased extraction force. The support portion 103 of the plug connector 100 and the clip joint of the clip 200 work together to achieve a stable and reliable clip connection. The circular end face and side closing design of the plug joint 102, as well as the annular equidistant distribution and extension design of the support portion 103, reduce the resistance during insertion and improve the convenience of installation. The metal material of the clip 200, the number and layout of the clip joints, and the addition of spikes significantly increase the extraction force, ensuring the long-term stability of the connection. At the same time, the adsorption effect of the suction cup 300 and the slightly negative pressure state of the exhaust hole 301 also provide additional guarantees for the stability of the connection. In summary, the light hole locking clip in this embodiment has the characteristics of excellent connection effect, low insertion force, and high extraction force, and is suitable for application scenarios such as automobiles that require high stability and safety.

[0065] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the scope of protection of the utility model.

Claims

1. A buckle for a light hole, characterized in that: include: A plug-in connector (100) having a columnar structure and capable of being inserted into a light hole (30) provided on a mounting plate (20) and being interference-connected with the light hole (30); A clamping piece (200) is detachably clamped on a plug-in piece (100). The clamping piece (200) utilizes at least one spring piece (202) and a clamping joint and is clamped in a light hole (30) by a pre-tightening force to increase the pulling-out force.

2. A buckle for a light hole according to claim 1, characterized in that: The connector (100) comprises a plug post (101) and a plug connector (102). The plug connector (102) is located at the bottom of the plug post (101), and its end face is circular and its side face is closed, so as to facilitate docking with the light hole (30) and eliminate airflow.

3. The buckle for a light hole according to claim 2, characterized in that: The connector (100) further comprises a support portion (103), which is located on a side wall of the connector column (101) near one end of the suction cup (300), and has at least two support portions (103) equidistantly distributed in a circular pattern. The support portions (103) extend radially outward and are interference-connected with the light hole (30).

4. A buckle for a light hole according to claim 3, characterized in that: The plug connector (100) further comprises a clamping portion (104) and a clamping block (105). The clamping portion (104) is a mounting groove provided on the supporting portion (103) and is used to provide a mounting space for the clamping portion (200). The clamping block (105) is connected to both sides of the clamping portion (104), is in the shape of a triangular prism, and facilitates the insertion and locking of the clamping portion (200).

5. The buckle for a light hole according to claim 1, characterized in that: The clamping member (200) comprises a clamping sleeve (201) which is U-shaped and covers the clamping portion (104) of the plug-in member (100). The clamping sleeve (201) is provided with a clamping interface (204) corresponding to the clamping block (105) of the plug-in member (100) to achieve clamping fit.

6. The buckle for a light hole according to claim 5, characterized in that: The clamping member (200) comprises at least two clamping joints, and the ends of the clamping joints are connected with triangular spikes.

7. The buckle for a light hole according to claim 6, characterized in that: When the number of the snap connectors is set to two, both snap connectors adopt the structure of snap connector one (203), and the two snap connectors one (203) are symmetrically distributed on both sides of the snap sleeve (201). When the snap body (10) is pulled out, the two snap connectors one (203) can be snapped onto the inner wall of the light hole (30).

8. The buckle for a light hole according to claim 7, characterized in that: When the number of the clamping joints is set to three, the clamping member (200) further comprises a second clamping joint (203'). The second clamping joint (203') is located on the same side as the two first clamping joints (203) and is smaller in size to increase the clamping force.

9. A buckle for a light hole according to any one of claims 5 to 7, characterized in that: A spring piece (202) is provided on one side of the card joint of the card connector (200) close to the card sleeve (201); the spring piece (202) contracts in the direction of the plug-in column (101) when the card joint moves into the light hole (30), and provides an elastic force toward the light hole (30).

10. The buckle for a light hole according to claim 9, characterized in that: The clamping member (200) and the mounting plate (20) are both made of metal, and the hardness of the clamping member (200) is greater than the hardness of the mounting plate (20).

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