Clamping assembly and power system microcomputer protection device

Abstract

The invention discloses a clamping assembly and a power system microcomputer protection device, and belongs to the technical field of microcomputer protection devices.The clamping assembly comprises a shell; the sliding block is installed on the shell in a sliding mode, a clamping groove is formed in the surface of the sliding block, and the number of the clamping groove is at least one; the clamping block is elastically installed on the shell, and the clamping block can be connected with the clamping groove in a clamped mode; when the sliding block moves in the direction close to the clamping block, the clamping block is pushed by the clamping groove to move up and down in a reciprocating mode. When the sliding block tends to move in the direction away from the clamping block, the clamping block can limit the sliding block to move. The clamping state is rapidly adjusted through the clamping assembly, and loosening of the clamping state can be avoided; the chip is fixed and protected through the microcomputer protection device of the power system, and the second mounting plate is driven to further extrude the chip by utilizing the extrusion force of the first mounting plate, so that the chip is more stable.

Description

Technical Field

[0001] The invention relates to the technical field of microcomputer protection devices, in particular to a clamping assembly and a microcomputer protection device for an electric power system. Background Art

[0002] The microcomputer protection device is composed of highly integrated, bus-free chip microcomputers, high-precision current and voltage transformers, high-insulation strength export intermediate relays, high-reliability switching power supply modules and other components. At present, the CPU plug-in of the microcomputer protection device in the power system cannot protect the CPU when in use, which causes a large amount of dust to contact the CPU surface for a long time, which can easily cause damage to the CPU.

[0003] For example, Chinese patent CN221573110U discloses a CPU plug-in for a microcomputer protection device for a power system, including a CPU and a heat sink. The heat sink is disposed on the top of the CPU, and the CPU plug-in for the microcomputer protection device for a power system also includes a protective mechanism disposed on the outside of the bottom end of the heat sink. When the CPU plug-in for the microcomputer protection device for a power system is used, the heat sink is used to conduct heat and dissipate heat for the CPU during use, and the protective mechanism is used to protect the surface of the CPU to prevent a large amount of dust from contacting the CPU and causing damage. The coordinated use of the above structure solves the problem that the CPU cannot be protected during use, resulting in a large amount of dust contacting the CPU and causing damage to the CPU.

[0004] Although the device in the above document can protect the CPU plug-in from dust and dissipate heat during daily use, it still has obvious defects in actual use, such as:

[0005] Before using the device, the CPU needs to be installed inside the device, and then the heat sink can be fixed on the surface of the CPU using thermal adhesive. Although this method can achieve the heat dissipation effect, the installation procedure in the early stage is cumbersome, and when the CPU is disassembled later, the thermal adhesive needs to be removed, which is inconvenient to use. At the same time, after the CPU plug-in is installed, it needs to be connected to the internal port using a wire tape. The device completely covers both sides of the CPU plug-in, making it impossible to pull out the wire tape and affecting the connection.

[0006] Therefore, a CPU plug-in unit of a power system microcomputer protection device that can be easily disassembled and assembled is now designed to solve such defects. Summary of the invention

[0007] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0008] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0009] Therefore, a first object of the present invention is to provide a snap-in assembly that can quickly adjust the snap-in state and prevent the snap-in state from loosening.

[0010] To solve the above technical problems, the present invention provides the following technical solutions: a snap-on assembly, comprising a shell; a slider, which is slidably mounted on the shell, a slot is provided on the surface of the slider, and the slot is provided with at least one; a snap-on block, which is elastically mounted on the shell, and the snap-on block can be snap-on with the slot; when the slider moves toward the direction approaching the snap-on block, the snap-on block reciprocates up and down under the push of the slot; when the slider tends to move toward the direction away from the snap-on block, the snap-on block can limit the movement of the slider.

[0011] As a preferred solution of the snap-in assembly of the present invention, it also includes a limit block, a first slide groove is opened on the top of the shell, the limit block is slidably connected to the first slide groove, the limit block can move along the length direction of the first slide groove, and a tooth portion is provided at the end of the limit block away from the snap-in block.

[0012] As a preferred solution of the snap-on assembly of the present invention, the limit block also includes a connecting portion, the connecting portion is located in the shell, a mounting hole is provided on the connecting portion, a guide column is slidably installed in the mounting hole, the guide column is elastically connected to the connecting portion, and the guide column also conflicts with the snap-on block.

[0013] As a preferred solution of the clamping assembly of the present invention, a second slide groove is further provided on the top of the shell, the clamping block is slidably connected to the second slide groove, and the clamping block can move up and down along the length direction of the second slide groove.

[0014] As a preferred solution of the snap-in assembly of the present invention, a third slide groove is further provided at one end of the shell close to the slider, the slider is slidably connected to the third slide groove, and the slider can slide in the third slide groove along the length direction of the shell.

[0015] As a preferred solution of the snap-in assembly of the present invention, the snap-in block includes a wedge-shaped portion and a snap-in portion, the wedge-shaped portion is connected to the snap-in portion, the wedge-shaped portion can be in contact with the flange of the slot, and the snap-in portion can be in contact with the side wall of the slot.

[0016] As a preferred solution of the clamping assembly of the present invention, the sliding block includes a limiting column, and one end of the limiting column facing the clamping block is provided with a limiting groove, and at least one limiting groove is provided.

[0017] The second object of the present invention is to provide a power system microcomputer protection device, which can fix the chip to protect the chip, and use the squeezing force of the first mounting plate to drive the second mounting plate to further squeeze the chip, which is more stable.

[0018] In order to solve the above technical problems, the present invention provides the following technical solutions: a power system microcomputer protection device, comprising the above-mentioned clamping assembly, and a first mounting plate, whose bottom is in conflict with the upper surface of the chip, the slider is slidably installed on the first mounting plate, and the side wall of the first mounting plate is provided with an extrusion portion; a second mounting plate, whose top is in conflict with the lower surface of the chip, and its side wall is provided with a limiting portion that can be clamped with the limiting groove; a clamping piece, which is slidably connected to the second mounting plate, and the clamping piece also conflicts with the extrusion portion, and the extrusion portion can squeeze the clamping piece to move in a direction close to the lower surface of the chip.

[0019] As a preferred solution of the power system microcomputer protection device of the present invention, wherein: a storage cavity is provided on the upper surface of the second mounting plate, a supporting plate is provided on the inner wall of the storage cavity, and a fourth slide groove is provided on the supporting plate; the clamping member includes an elastic plate and a return frame, a protrusion is provided on the elastic plate, the protrusion is slidably connected to the fourth slide groove, the return frame is located in the storage cavity, and the return frame is detachably connected to the protrusion.

[0020] As a preferred solution of the power system microcomputer protection device of the present invention, the elastic plate includes a bending portion and a resistance portion, one end of the bending portion is connected to the resistance portion, and the other end of the bending portion is connected to the main body of the elastic plate.

[0021] The beneficial effects of the present invention are: the clamping state can be quickly adjusted through the clamping assembly, and the clamping state can be prevented from loosening; the chip is fixed by the power system microcomputer protection device to protect the chip, and the squeezing force of the first mounting plate is used to drive the second mounting plate to further squeeze the chip, which is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0023] Figure 1 It is a structural diagram of the clamping assembly of the present invention.

[0024] Figure 2 for Figure 1 Magnified view of area A.

[0025] Figure 3 The structure diagram of the microcomputer protection device for an electric power system of the clamping assembly of the present invention is shown.

[0026] Figure 4 The structure diagram of the elastic plate of the power system microcomputer protection device of the clamping assembly of the present invention.

[0027] Figure 5 The bottom perspective view of the power system microcomputer protection device of the snap-in assembly of the present invention.

[0028] Figure 6 This is a structural diagram of the first mounting plate of the power system microcomputer protection device of the snap-in assembly of the present invention. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0032] Furthermore, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1

[0034] Reference Figure 1 to Figure 6 , which is the first embodiment of the present invention, provides a snap-fit ​​assembly, including a housing 101 , a slider 102 and a snap-fit ​​block 103 .

[0035] Specifically, the slider 102 is slidably installed on the shell 101, and a slot 102a is provided on the surface of the slider 102, and the slot 102a is provided with at least one; the clamping block 103 is elastically installed on the shell 101, and the clamping block 103 can be clamped with the slot 102a; when the slider 102 moves toward the direction approaching the clamping block 103, the clamping block 103 reciprocates up and down under the push of the clamping slot 102a; when the slider 102 tends to move in the direction away from the clamping block 103, the clamping block 103 can limit the movement of the slider 102.

[0036] The housing 101 of this embodiment is a rectangular metal housing, which is used to accommodate and fix other components.

[0037] The slider 102 is a plastic slider with eleven slots 102 a located on the upper end surface of the slider for being engaged with the engaging block 103 .

[0038] The clamping block 103 is an elastic metal clamping block installed inside the housing 101 and can be clamped with the clamping groove 102a on the slider 102. The clamping block 103 is designed to reciprocate up and down when the slider 102 moves to achieve clamping or release.

[0039] The elastic mechanism of this embodiment is that the clamping block 103 is elastically installed by a built-in spring, so that it can move under the push of the clamping slot 102a and limit the movement of the slider 102 when the movement trend of the slider 102 weakens.

[0040] In this embodiment, the design of the snap-on assembly focuses on using a combination of plastic and metal to achieve a balance between cost-effectiveness and durability.

[0041] When in use, the fastening state can be adjusted through the interaction between the slider 102 and the clamping block 103, and the clamping state can be prevented from loosening, thereby improving the stability and reliability of the clamping assembly and reducing the risk of failure caused by unstable clamping.

[0042] Example 2

[0043] This is the second embodiment of the present invention, which is basically the same as the first embodiment, except that the embodiment is described as follows.

[0044] In this embodiment, the housing 101 is a cylindrical metal housing designed for rotatable installation to adapt to different installation directions.

[0045] The slider 102 is a metal cylindrical slider with slots 102a. The number of the slots is eleven and they are evenly distributed in the circumferential direction of the slider to provide more options for snap-in positions.

[0046] The clamping block 103 is an elastic plastic clamping block installed inside the housing 101 and can be clamped with the clamping slot 102a on the slider 102. The clamping block 103 is designed to reciprocate along the flange and side wall of the clamping slot 102a when the slider 102 moves.

[0047] The elastic mechanism of this embodiment is that the clamping block 103 is elastically mounted by an external rubber gasket or spring, so that it can move under the push of the clamping slot 102a and limit the movement of the slider 102 when the movement trend of the slider 102 weakens. In this embodiment, the combination of metal and plastic can also be used to achieve high strength and high elasticity.

[0048] Example 3

[0049] See also Figure 1 to Figure 6 , which is the third embodiment of the present invention, and this embodiment is based on embodiment 1.

[0050] Specifically, it also includes a limit block 104, and a horizontally arranged first slide groove 101a is provided on the top of the housing 101. The limit block 104 is slidably connected to the first slide groove 101a, and the limit block 104 can move along the length direction of the first slide groove 101a. The end of the limit block 104 away from the clamping block 103 is provided with a clamping tooth portion 104a, and the clamping tooth portion 104a can be clamped with a rack-shaped component. The movement of the limit block 104 and the setting of the clamping tooth portion 104a provide an additional locking mechanism to ensure the accurate positioning of the slider 102 during the clamping process.

[0051] Preferably, the limit block 104 further includes a connecting portion 104b, the connecting portion 104b is located in the housing 101, the connecting portion 104b is vertically arranged, a mounting hole 104c is provided on the connecting portion 104b, the mounting hole 104c is horizontally arranged, a guide post 105 is slidably installed in the mounting hole 104c, the guide post 105 is elastically connected to the connecting portion 104b through a spring, and the guide post 105 also conflicts with the clamping block 103. Thus, the clamping failure caused by external impact or pressure change can be reduced, and the durability and adaptability of the clamping assembly are improved.

[0052] Preferably, a second slide groove 101b is further provided on the top of the housing 101, and the clamping block 103 is slidably connected to the second slide groove 101b. When the clamping block 103 is squeezed by an upward external force, the clamping block 103 can move up and down along the length direction of the second slide groove 101b. This increases the adaptability of the clamping assembly, enables it to adapt to sliders 102 of different sizes or shapes, and improves the versatility and flexibility of the clamping assembly.

[0053] Preferably, a third slide groove 101c is further provided at the left end of the shell 101, i.e., the end close to the slider 102. The third slide groove 101c is horizontally arranged, and the slider 102 is slidably connected to the third slide groove 101c. The slider 102 can slide in the third slide groove 101c along the length direction of the shell 101, which can provide more installation and adjustment options, so that the snap-on assembly can more easily adapt to different installation environments and requirements.

[0054] Preferably, the clamping block 103 includes a wedge-shaped portion 103a and a clamping portion 103b, the wedge-shaped portion 103a is connected to the clamping portion 103b, the wedge-shaped portion 103a is located on the left side of the clamping portion 103b, the wedge-shaped portion 103a can interfere with the flange of the clamping slot 102a, and the clamping portion 103b can interfere with the side wall of the clamping slot 102a, providing a double clamping mechanism to enhance the safety of the clamping.

[0055] Furthermore, the slider 102 includes a limiting column 102a, and a limiting groove 102b is provided at one end of the limiting column 102a facing the clamping block 103. There is at least one limiting groove 102b, and two limiting grooves 102b are provided in this embodiment. The limiting grooves 102b are horizontally arranged. The limiting grooves 102b can be clamped with the side of the chip. On the one hand, it helps to prevent the slider 102 from accidentally moving during the clamping process, ensuring the stability and accuracy of the clamping process. On the other hand, it can limit the chip from falling off.

[0056] Example 4

[0057] See also Figure 1 to Figure 6 , which is the fourth embodiment of the present invention, and is based on the above embodiment. This embodiment provides a power system microcomputer protection device, comprising a first mounting plate 200, a second mounting plate 300 and a pressing member 400. The first mounting plate 200 and the second mounting plate 300 are used to clamp the chip up and down.

[0058] Specifically, the bottom of the first mounting plate 200 is in conflict with the upper surface of the chip, the slider 102 is slidably installed on the first mounting plate 200, the side wall of the first mounting plate 200 is provided with a groove, the slider 102 is slidably connected to the groove, and the slider 102 is interference fit with the groove, and the side wall of the first mounting plate 200 is provided with an extrusion portion 201.

[0059] The top of the second mounting plate 300 is in contact with the lower surface of the chip, and its side wall is provided with a limiting portion 301 that can be snapped into the limiting groove 102b, that is, the limiting groove 102b can also be snapped into the side of the limiting portion 301 of the second mounting plate 300 to limit the second mounting plate 300 from falling off.

[0060] The pressing member 400 is slidably connected to the second mounting plate 300, and the pressing member 400 also contacts the pressing part 201, and the pressing part 201 can press the pressing member 400 to move toward the lower surface of the chip. The pressing force of the first mounting plate 200 is used to drive the second mounting plate 300 to further press the chip, which is more stable.

[0061] Preferably, a storage cavity 302 is provided on the upper surface of the second mounting plate 300, and the storage cavity 302 is rectangular in shape. There are multiple storage cavities 302, and a supporting plate 303 is provided on the inner wall of the storage cavity 302. The supporting plate 303 is U-shaped, and a fourth slide groove 304 is provided on the supporting plate 303, and the fourth slide groove 304 is vertically arranged.

[0062] The pressing member 400 includes an elastic plate 401 and a return frame 402. The elastic plate 401 is provided with a bump 403. The bump 403 is slidably connected to the fourth slide groove 304. The return frame 402 is located in the storage cavity 302. The return frame 402 and the bump 403 are detachably connected by a buckle. This design allows the pressing member 400 to adjust the upward pressure according to the squeezing force of the first mounting plate 200 to adapt to different chips and make the installed chips more stable.

[0063] Furthermore, the elastic plate 401 includes a bending portion 401a, a contact portion 401b and a main body 401c, the bending portion 401a provides elastic force, one end of the bending portion 401a is connected to the contact portion 401b, and the other end of the bending portion 401a is connected to the main body 401c of the elastic plate 401, and the bending portion 401a, the contact portion 401b and the main body 401c are integrally formed. The extrusion force of the first mounting plate 200 acts on the contact portion 401b and the bending portion 401a to drive the return frame 402 on the main body 401c to move upward, so that the pressing member 400 can more effectively contact and apply pressure to the chip, improve the adaptability and effect of the pressing member 400, and ensure the stable fixation and protection of the chip.

[0064] Based on the above, the beneficial effects of the present invention are:

[0065] 1. The interaction between the slider 102 and the clamping block 103 can realize rapid adjustment of the clamping state and prevent the clamping state from loosening, thereby improving the stability and reliability of the clamping assembly and reducing the risk of failure caused by unstable clamping.

[0066] 2. The chip is clamped up and down by the first mounting plate 200 and the second mounting plate 300. The squeezing force of the first mounting plate 200 acts on the abutment portion 401b and the bending portion 401a to drive the return frame 402 on the main body portion 401c to move upward, so that the clamping piece 400 can contact and apply pressure to the chip more effectively, thereby improving the adaptability and effect of the clamping piece 400 and ensuring stable fixation and protection of the chip.

[0067] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0068] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0069] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A clamping assembly, characterized in that: include: Housing (101); A slider (102) is slidably mounted on the housing (101), a surface of the slider (102) being provided with a slot (102a), and the slot (102a) is provided with at least one; A clamping block (103) which is elastically mounted on the housing (101), and the clamping block (103) can be clamped with the clamping slot (102a); When the sliding block (102) moves toward the direction approaching the clamping block (103), the clamping block (103) moves reciprocatingly up and down under the push of the clamping slot (102a); When the sliding block (102) has a tendency to move in a direction away from the clamping block (103), the clamping block (103) can limit the movement of the sliding block (102).

2. The clamping assembly according to claim 1, characterized in that: The housing (101) further comprises a limit block (104), a first slide groove (101a) is provided on the top of the housing (101), the limit block (104) is slidably connected to the first slide groove (101a), the limit block (104) can move along the length direction of the first slide groove (101a), and a latching tooth portion (104a) is provided at one end of the limit block (104) away from the latching block (103).

3. The clamping assembly according to claim 2, characterized in that: The limit block (104) further comprises a connecting portion (104b), wherein the connecting portion (104b) is located in the housing (101), wherein a mounting hole (104c) is provided on the connecting portion (104b), wherein a guide column (105) is slidably mounted in the mounting hole (104c), wherein the guide column (105) is elastically connected to the connecting portion (104b), and wherein the guide column (105) also contacts the clamping block (103).

4. The clamping assembly according to any one of claims 1 to 3, characterized in that: The top of the shell (101) is also provided with a second sliding groove (101b), and the clamping block (103) is slidably connected to the second sliding groove (101b), and the clamping block (103) can move up and down along the length direction of the second sliding groove (101b).

5. The clamping assembly according to claim 4, characterized in that: A third sliding groove (101c) is also provided at one end of the shell (101) close to the slider (102), and the slider (102) is slidably connected to the third sliding groove (101c). The slider (102) can slide in the third sliding groove (101c) along the length direction of the shell (101).

6. The clamping assembly according to claim 1, characterized in that: The clamping block (103) comprises a wedge-shaped portion (103a) and a clamping portion (103b), wherein the wedge-shaped portion (103a) is connected to the clamping portion (103b), the wedge-shaped portion (103a) can abut against the flange of the clamping slot (102a), and the clamping portion (103b) can abut against the side wall of the clamping slot (102a).

7. The clamping assembly according to claim 1, characterized in that: The sliding block (102) comprises a limiting column (102a), one end of the limiting column (102a) facing the clamping block (103) is provided with a limiting groove (102b), and at least one limiting groove (102b) is provided.

8. A microcomputer protection device for a power system, characterized in that: include: The snap-on assembly according to claim 7, and A first mounting plate (200), the bottom of which contacts the upper surface of the chip, the slider (102) being slidably mounted on the first mounting plate (200), and a side wall of the first mounting plate (200) being provided with an extrusion portion (201); A second mounting plate (300), the top of which contacts the lower surface of the chip, and the side wall of which is provided with a limiting portion (301) capable of being engaged with the limiting groove (102b); A pressing piece (400) is slidably connected to the second mounting plate (300), and the pressing piece (400) also contacts the pressing portion (201), and the pressing portion (201) can press the pressing piece (400) to move toward the direction close to the lower surface of the chip.

9. The power system microcomputer protection device according to claim 8, characterized in that: The upper surface of the second mounting plate (300) is provided with a storage cavity (302), the inner wall of the storage cavity (302) is provided with a supporting plate (303), and the supporting plate (303) is provided with a fourth sliding groove (304); The pressing member (400) comprises an elastic plate (401) and a return frame (402); a protrusion (403) is provided on the elastic plate (401); the protrusion (403) is slidably connected to the fourth slide groove (304); the return frame (402) is located in the storage cavity (302); the return frame (402) and the protrusion (403) are detachably connected.

10. The power system microcomputer protection device according to claim 9, characterized in that: The elastic plate (401) comprises a bending portion (401a) and a resisting portion (401b), one end of the bending portion (401a) is connected to the resisting portion (401b), and the other end of the bending portion (401a) is connected to the main body (401c) of the elastic plate (401).

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