A multilayer circuit board capable of preventing a circuit board from colliding with another circuit board

Abstract

The application provides a multilayer circuit board capable of preventing circuit board movement collision, relates to the technical field of circuit boards, and aims at solving the problems that the edges of the existing multilayer circuit board are prone to wear, the clamping force is too large to cause damage to the multilayer circuit board, the service life is reduced, the multilayer circuit board is fixed through bolts, the bolts are prone to corrosion and loosening, the stability is reduced, and the installation and dismounting of the multilayer circuit board are troublesome due to the deep installation position of the multilayer circuit board, comprising a bottom plate, a multilayer circuit board body arranged above the bottom plate, the multilayer circuit board body and the bottom plate being arranged in parallel, and a guard plate arranged at the left and right ends of the multilayer circuit board body. The application can drive the rocker arm to swing upward by swinging the rocker and rotating the rotating rod, drive the mounting seat to slide upward through the driving rod, and lift the multilayer circuit board body upward, so that the operation is convenient and the installation and dismounting of the multilayer circuit board body are facilitated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of circuit board, more particularly, it is especially related to a multi-layer circuit board capable of preventing the movement and collision of circuit board. BACKGROUND

[0002] High-end electronic products, due to the space design factors of the products, in addition to the surface wiring, the internal can be superimposed with multiple layers of circuit, in the production process, after making each layer of circuit, through the positioning of optical equipment, compression, let the multiple layers of circuit superimposed in a piece of circuit board, commonly known as multi-layer circuit board.

[0003] For example, the application number: CN201711401851.7 discloses a multi-layer circuit board, comprising: a center substrate, at least one interlayer insulating layer arranged on one of the two working surfaces of the center substrate, a circuit layer arranged on the surface of the interlayer insulating layer, and a high dielectric layer arranged on the surface of the circuit layer and electrically connected with the circuit layer, the high dielectric layer is combined with the interlayer insulating layer, and the high dielectric layer is connected with a decoupling capacitor. The high dielectric layer is arranged between the circuit layers, and when the semiconductor element installed on the circuit board is turned on / high or turned off, the decoupling capacitor can provide a relatively stable power supply in time when the potential of the power line drops momentarily, and at the same time, the noise coupled to the power end of the semiconductor element can be reduced. At the same time, the circuit board adopts multi-stage noise reduction, which can effectively reduce the problem of function decline of single high dielectric layer and improve the decoupling capacity of the circuit board. Secondly, the multi-stage high dielectric layer can effectively reduce the energy consumption of the circuit board.

[0004] The edge of the existing multi-layer circuit board is easy to be worn, and at the same time, if the clamping force is too large, it will cause damage to the multi-layer circuit board, thereby reducing the service life of the multi-layer circuit board. Moreover, the multi-layer circuit board is fixed by bolts, and the bolts are easy to be corroded and loose, thereby reducing the stability. In addition, the installation position of the multi-layer circuit board is relatively deep, which will cause trouble in the installation and disassembly of the multi-layer circuit board. SUMMARY

[0005] In order to solve the above technical problems, the present application provides a multi-layer circuit board capable of preventing the movement and collision of circuit board, so as to solve the problem that the edge of the existing multi-layer circuit board is easy to be worn, and at the same time, if the clamping force is too large, it will cause damage to the multi-layer circuit board, thereby reducing the service life of the multi-layer circuit board. Moreover, the multi-layer circuit board is fixed by bolts, and the bolts are easy to be corroded and loose, thereby reducing the stability. In addition, the installation position of the multi-layer circuit board is relatively deep, which will cause trouble in the installation and disassembly of the multi-layer circuit board.

[0006] The purpose and effect of the multi-layer circuit board capable of preventing the movement and collision of circuit board are achieved by the following specific technical means:

[0007] The utility model provides a multilayer circuit board which can prevent circuit board from moving collision, comprising a bottom plate, a multilayer circuit board body is arranged above the bottom plate, the multilayer circuit board body is parallel to the bottom plate, and the left and right ends of the multilayer circuit board body are provided with a guard plate; two fixing clamps are arranged on the guard plate, the guard plate is connected to the multilayer circuit board body through the fixing clamps, the front and back ends of the guard plate are provided with a support block, and the middle position of the top end of the guard plate is provided with a fixed plate; the left and right sides of the top end of the bottom plate are provided with a connecting plate, the connecting plate corresponds to the position of the fixed plate, and the top end of the connecting plate is provided with two clamping plates; a rotating rod is arranged above the bottom plate, two transmission assemblies are arranged on the rotating rod, and the transmission assemblies are symmetrically distributed.

[0008] Further, the bottom plate comprises a support plate and a plug rod, the left and right sides of the top end of the bottom plate are provided with a support plate, the support plates are symmetrically distributed, the connecting plate is fixedly installed on the top end of the support plate through a bolt, the rotating rod is rotatably connected to the two support plates through a bearing, and the top end of the bottom plate is provided with four plug rods, which are vertically distributed and arranged at the diagonal positions of the bottom plate.

[0009] Further, the guard plate comprises a mounting seat, a sleeve and a first rubber pad, the middle position of the guard plate is provided with a mounting seat, the fixed plate is fixedly connected to the mounting seat through a bolt, the bottom end of the guard plate is provided with two sleeves, the plug rod is slidably inserted into the sleeve, one side of the guard plate is provided with a first rubber pad, and the first rubber pad is located at the position where the guard plate is connected to the multilayer circuit board body.

[0010] Further, the fixing clamp comprises a clamping plate and a second rubber pad, each fixing clamp is provided with two clamping plates, the clamping plates are parallelly arranged in an up-down manner and are fixedly connected to the guard plate through a bolt, the opposite inner sides of the two clamping plates are provided with a second rubber pad, and the second rubber pad is located between the clamping plate and the multilayer circuit board body.

[0011] Further, the support block comprises a sliding rod, a support disc, a compression spring and a mounting groove, the mounting groove is formed in one side of the support block, the sliding rod is slidably connected to the support block, the end of the sliding rod is provided with a support disc, the support disc is in contact with the multilayer circuit board body, the compression spring is sleeved on the sliding rod, and the compression spring is supported between the support disc and the support block.

[0012] Further, the connecting plate comprises a sliding groove and a limiting round rod, the connecting plate is in a U-shaped structure, two sliding grooves are formed in the top of the connecting plate, the sliding grooves are in a T-shaped groove structure, the limiting round rod is arranged in the sliding groove, and the two sliding grooves correspond to the positions of the clamping plates.

[0013] Further, the clamping plate comprises a clamping groove, a limiting hole and a sliding block, two clamping plates are symmetrically distributed, and the opposite inner sides of the two clamping plates are provided with the clamping groove, the clamping groove has a wave shape structure, the clamping plate is provided with the limiting hole, the limiting hole is a waist circular through hole, the bottom end of the clamping plate is provided with the sliding block, the sliding block has a T-shaped structure, the sliding block is arranged in the sliding groove, the limiting circular rod is slidably penetrated through the sliding block, the sliding block is slidably connected with the connecting plate through the sliding groove, and the locking bolt is penetrated through the limiting hole and locked with the connecting plate.

[0014] Further, the fixing plate comprises a wedge-shaped clamping block, and the top end of the fixing plate is provided with the wedge-shaped clamping block; when the fixing plate is in a connected state with the clamping plate, the wedge-shaped clamping block is located between the two clamping plates, and the wedge-shaped clamping block is clamped with the clamping plate through the clamping groove.

[0015] Further, the rotating rod comprises a striped surface, a rocker and a support frame, the rotating rod is provided with two striped surfaces, the two striped surfaces are symmetrically distributed, and the striped surfaces are provided with the support frame; the support frame is fixedly connected with the bottom plate through the bolt, the rotating rod is rotatably connected with the support frame through the bearing, the support frame is matched with the transmission assembly in position, the rotating rod penetrates through the right support plate, and the end of the rotating rod is provided with the rocker.

[0016] Further, the transmission assembly comprises a fixed sleeve, a rocker and a driving rod, one end of the rocker is provided with the fixed sleeve, the fixed sleeve is arranged at the striped surface, the other end of the rocker is rotatably connected with the driving rod through the pin shaft, the end of the driving rod is provided with a rotating shaft, and the driving rod is rotatably connected with the mounting seat through the rotating shaft.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. The two protective plates protect the left and right ends of the multilayer circuit board body, and the first rubber pad is located at the position where the protective plate is connected with the multilayer circuit board body, so that the edge can be prevented from being worn; the two protective plates protect the left and right ends of the multilayer circuit board body, and the first rubber pad is located at the position where the protective plate is connected with the multilayer circuit board body, so that the edge can be prevented from being worn; the support plate and the slide rod support the multilayer circuit board body, and the elasticity of the compression spring is used to position the multilayer circuit board body.

[0019] 2. The sliding block is arranged in the sliding groove, the limiting circular rod is slidably penetrated through the sliding block, when the fixing plate is in a connected state with the connecting plate and the clamping plate, the wedge-shaped clamping block is located between the two clamping plates, the wedge-shaped clamping block is clamped with the clamping plate through the clamping groove, the sliding block of the clamping plate is slidably connected with the connecting plate through the sliding groove, and the locking bolt is penetrated through the limiting hole and locked with the connecting plate, so that the connecting structure is simple, the protective plate can be firmly connected with the bottom plate, and the installation of the multilayer circuit board body is more stable.

[0020] 3、Since the other end of the rocker arm is rotatably connected with the driving rod through a pin shaft, the end of the driving rod is provided with a rotating shaft, and the driving rod is rotatably connected with the mounting base through the rotating shaft, the driving rod pushes the mounting base to slide upward by rotating the rotating rod to swing the rocker arm upward, so that the multilayer circuit board body is lifted upward, and the operation mode is convenient, and the multilayer circuit board body is convenient to install and disassemble.

[0021] Other advantages, objects, and features of the application will be apparent from the following description, and will be understood by those skilled in the art. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic view of the shaft structure of the application.

[0023] Figure 2 is Figure 1 is a schematic view of the structure after the multilayer circuit board body is removed.

[0024] Figure 3 is a schematic view of the structure of the bottom plate, rotating rod and transmission assembly of the application.

[0025] Figure 4 is a schematic view of the structure of the guard plate, fixing frame and supporting block of the application.

[0026] Figure 5 is a schematic view of the Figure 2 is an enlarged schematic view of part A of the application.

[0027] Figure 6 is a schematic view of the structure of the transmission assembly and part of the rotating rod of the application.

[0028] Figure 7 is a schematic view of the structure of the connecting plate, clamping plate and fixing plate of the application.

[0029] Figure 8 is Figure 7 is a schematic view of the structure in the explosion state.

[0030] In the drawings, the correspondence between the component names and the drawing numbers is as follows:

[0031] 1, bottom plate; 101, support plate; 102, plug rod; 2, guard plate; 201, mounting seat; 202, sleeve; 203, first rubber pad; 3, fixing clamp; 301, clamp plate; 302, second rubber pad; 4, support block; 401, slide rod; 402, support disc; 403, compression spring; 404, mounting groove; 5, connecting plate; 501, sliding groove; 502, limiting round rod; 6, clamping plate; 601, clamping groove; 602, limiting hole; 603, sliding block; 7, fixed plate; 701, wedge-shaped clamping block; 8, rotating rod; 801, striped surface; 802, rocker; 803, support frame; 9, transmission assembly; 901, fixed sleeve; 902, rocker arm; 903, drive rod; 10, multilayer circuit board body. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be further described below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0033] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] Embodiment:

[0036] As shown in the accompanying drawings Figure 1 to the accompanying drawings Figure 8 as shown:

[0037] The application provides a multilayer circuit board capable of preventing circuit board movement collision, which comprises a bottom plate 1, a multilayer circuit board body 10 arranged above the bottom plate 1 and parallel to the bottom plate 1, and a guard plate 2 arranged at the left and right ends of the multilayer circuit board body 10; the bottom plate 1 comprises a support plate 101 and a plug rod 102, the support plate 101 is arranged at the left and right sides of the top end of the bottom plate 1 and symmetrically distributed, a connecting plate 5 is fixedly installed on the top end of the support plate 101 through bolts, and a rotating rod 8 is rotatably connected with the two support plates 101 through bearings, four plug rods 102 are arranged at the top end of the bottom plate 1 and vertically distributed, and the plug rods 102 are arranged at the diagonal positions of the bottom plate 1; two fixing clamps 3 are arranged on the two guard plates 2, the guard plate 2 is connected with the multilayer circuit board body 10 through the fixing clamps 3, support blocks 4 are arranged at the front and rear ends of the guard plate 2, and a fixed plate 7 is arranged at the middle position of the top end of the guard plate 2; the connecting plate 5 comprises a sliding groove 501 and a limiting round rod 502, the connecting plate 5 is in U-shaped structure, two sliding grooves 501 are formed in the top of the connecting plate 5, the sliding groove 501 is in T-shaped groove structure, the limiting round rod 502 is arranged in the sliding groove 501, and the two sliding grooves 501 correspond to the positions of the clamping plates 6; the connecting plate 5 corresponds to the position of the fixed plate 7; the fixed plate 7 comprises a wedge-shaped clamping block 701, and the wedge-shaped clamping block 701 is arranged at the top end of the fixed plate 7; two transmission assemblies 9 are arranged on the rotating rod 8 and symmetrically distributed.

[0038] The guard plate 2 comprises a mounting seat 201, a sleeve 202 and a first rubber pad 203, the mounting seat 201 is arranged at the middle position of the guard plate 2 and fixedly connected with the mounting seat 201 through bolts, the sleeve 202 is arranged at the bottom end of the guard plate 2, the plug rod 102 is slidably inserted into the sleeve 202, the first rubber pad 203 is arranged on one side of the guard plate 2, the left and right ends of the multilayer circuit board body 10 are protected by the two guard plates 2, and the first rubber pad 203 is arranged at the position where the guard plate 2 is connected with the multilayer circuit board body 10, so that the edge can be prevented from being abraded;

[0039] The fixing clamp 3 comprises a clamping plate 301 and a second rubber pad 302, each group of fixing clamps 3 is provided with two clamping plates 301, the two clamping plates 301 are arranged in parallel at the upper and lower positions and fixedly connected with the guard plate 2 through bolts, the second rubber pad 302 is arranged at the opposite inner side of the two clamping plates 301, the guard plate 2 is fixed with the multilayer circuit board body 10 through the fixing clamps 3, and the second rubber pad 302 is arranged between the clamping plate 301 and the multilayer circuit board body 10, so that the clamping plate 301 can prevent the multilayer circuit board body 10 from being damaged due to excessive force in the clamping process;

[0040] The support block 4 comprises a sliding rod 401, a support circular plate 402, a compression spring 403 and a mounting groove 404, the mounting groove 404 is arranged on one side of the support block 4, the sliding rod 401 is arranged at the mounting groove 404, the sliding rod 401 is in sliding connection with the support block 4, the support circular plate 402 is arranged at the end of the sliding rod 401, the support circular plate 402 is in contact with the multilayer circuit board body 10, the compression spring 403 is sleeved on the sliding rod 401, and the compression spring 403 is arranged between the support circular plate 402 and the support block 4, the support circular plate 402 and the sliding rod 401 support the multilayer circuit board body 10, and the position of the multilayer circuit board body 10 is positioned by the elastic effect of the compression spring 403.

[0041] The clamping plate 6 comprises a clamping groove 601, a limiting hole 602 and a sliding block 603, the two clamping plates 6 are symmetrically arranged, the clamping groove 601 is arranged on the inner side of each clamping plate 6, the clamping groove 601 has a wave shape, the limiting hole 602 is a waist-shaped through hole, the sliding block 603 is arranged at the bottom end of the clamping plate 6, and the sliding block 603 has a T-shaped structure. Since the sliding block 603 is arranged in the sliding groove 501 and the limiting circular rod 502 is in sliding connection with the sliding block 603, when the fixing plate 7 is in connection with the connecting plate 5 and the clamping plate 6, the wedge-shaped clamping block 701 is located between the two clamping plates 6, the wedge-shaped clamping block 701 is clamped with the clamping plate 6 through the clamping groove 601, the sliding block 603 of the clamping plate 6 is in sliding connection with the connecting plate 5 through the sliding groove 501, the locking bolt is in locking connection with the connecting plate 5 through the limiting hole 602, and the fixing plate 7 is connected with the clamping plate 6 in a simple structure.

[0042] The rotating rod 8 comprises a striped surface 801, a rocker 802 and a support frame 803, the rotating rod 8 is provided with two striped surfaces 801, the two striped surfaces 801 are symmetrically arranged, the support frame 803 is arranged at each striped surface 801, the support frame 803 is fixedly connected with the bottom plate 1 through a bolt, the rotating rod 8 is rotatably connected with the support frame 803 through a bearing, the support frame 803 is matched with the transmission assembly 9 in position, the rotating rod 8 penetrates through the right supporting plate 101, and the rocker 802 is arranged at the end of the rotating rod 8.

[0043] The transmission assembly 9 comprises a fixing sleeve 901, a rocker arm 902 and a driving rod 903, the fixing sleeve 901 is arranged at one end of the rocker arm 902, the fixing sleeve 901 is sleeved on the striped surface 801, the other end of the rocker arm 902 is rotatably connected with the driving rod 903 through a pin shaft, the driving rod 903 is provided with a rotating shaft at the end, and the driving rod 903 is rotatably connected with the mounting seat 201 through the rotating shaft. By rocking the rocker 802, the rotating rod 8 is rotated to drive the rocker arm 902 to swing upward, so that the driving rod 903 drives the mounting seat 201 to slide upward, thereby lifting the multilayer circuit board body 10 upward.

[0044] In another embodiment, the chute 501 is provided with a restoring spring, and the chute 501 is sleeved on the limiting round rod 502, and the restoring spring is supported between the sliding block 603 and the side wall of the chute 501, and the elastic action of the restoring spring is utilized, so that the sliding block 603 is more stable during sliding, and the reliability of the clamping of the clamping plate 6 and the wedge-shaped clamping block 701 is improved.

[0045] In use, first, the left and right ends of the multilayer circuit board body 10 are protected by the two protective plates 2, and the first rubber pad 203 is located at the connection position of the protective plate 2 and the multilayer circuit board body 10, so that the edge is prevented from being worn; the left and right ends of the multilayer circuit board body 10 are protected by the two protective plates 2, and the first rubber pad 203 is located at the connection position of the protective plate 2 and the multilayer circuit board body 10, so that the edge is prevented from being worn; the multilayer circuit board body 10 is supported by the supporting circular plate 402 and the slide rod 401, and the elastic action of the compression spring 403 is utilized to position the multilayer circuit board body 10;

[0046] Secondly, when the fixed plate 7 is in a connected state with the connecting plate 5 and the clamping plate 6, the wedge-shaped clamping block 701 is located between the two clamping plates 6, and the wedge-shaped clamping block 701 is clamped with the clamping plate 6 through the clamping groove 601, and the sliding block 603 of the clamping plate 6 is slidingly connected with the connecting plate 5 through the sliding groove 501, and the locking bolt passes through the limiting hole 602 and is locked with the connecting plate 5, and the fixed plate 7 is connected with the fixed plate 7 through the clamping plate 6, and the connection structure is simple;

[0047] In addition, by shaking the rocker 802, the rotation of the rotating rod 8 can drive the rocker arm 902 to swing upward, so that the driving rod 903 pushes the mounting seat 201 to slide upward, thereby lifting the multilayer circuit board body 10 upward.

[0048] Embodiments of the present application are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the application to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments are chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to understand the application for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A multilayer circuit board that prevents circuit board movement and collisions, characterized in that: A multilayer circuit board that can prevent circuit board movement and collisions, including a base plate; The base plate is provided with a multi-layer circuit board body, and the multi-layer circuit board body is distributed in parallel with the base plate, and the left and right ends of the multi-layer circuit board body are provided with protective plates. Both of the aforementioned protective plates are provided with two fixing clips, and the protective plates are connected to the multilayer circuit board body through the fixing clips. Support blocks are provided at both the front and rear ends of the protective plates, and a fixing plate is provided at the middle position of the top of the protective plates. The bottom plate is provided with connecting plates on both the left and right sides of the top, and the positions of the connecting plates and the fixing plates are corresponding. Furthermore, there are two clamping plates at the top of each of the two connecting plates. A rotating rod is provided above the base plate, and two transmission components are provided on the rotating rod, and the two transmission components are distributed symmetrically. The base plate includes a support plate and insert rods. Support plates are provided on the left and right sides of the top of the base plate, and the two support plates are symmetrically distributed. A connecting plate is fixedly installed on the top of the support plate by bolts. The rotating rod is rotatably connected to the two support plates by bearings. There are four insert rods at the top of the base plate, and the insert rods are distributed vertically and located at four diagonal positions of the base plate. The protective plate includes a mounting base, a sleeve, and a first rubber pad. The mounting base is located in the middle of the protective plate, and the fixing plate is fixedly connected to the mounting base by bolts. There are two sleeves at the bottom of the protective plate, and the insertion rod is slidably inserted into the sleeve. The first rubber pad is located on one side of the protective plate, and the first rubber pad is located at the connection between the protective plate and the multilayer circuit board body. The connecting plate includes a sliding groove and a limiting round rod. The connecting plate has a U-shaped structure, and two sliding grooves are provided on the top of the connecting plate. The sliding grooves have a T-shaped groove structure, and the limiting round rods are provided in the sliding grooves. The two sliding grooves correspond to the positions of the clamping plate. The card plate includes a card slot, a limiting hole, and a slider. The two card plates are symmetrically distributed, and each of the two card plates has a card slot on its inner side. The card slot has a wave-shaped structure. The card plate has a limiting hole, which is an oval through hole. The bottom of the card plate has a slider, which has a T-shaped structure. The slider is set in a sliding groove, and the limiting rod slides through the slider. The slider is slidably connected to the connecting plate through the sliding groove, and the locking bolt passes through the limiting hole and locks with the connecting plate. The fixing plate includes a wedge-shaped locking block. The top of the fixing plate is provided with a wedge-shaped locking block. When the fixing plate and the locking plate are connected, the wedge-shaped locking block is located between the two locking plates, and the wedge-shaped locking block is engaged with the locking plate through a locking groove. The rotating rod includes a striped surface, a rocker arm, and a support frame. The rotating rod has two striped surfaces, which are symmetrically distributed. Each striped surface is equipped with a support frame, which is fixedly connected to the base plate by bolts. The rotating rod is rotatably connected to the support frame by bearings, and the support frame is matched with the position of the transmission component. The rotating rod passes through the right support plate, and a rocker arm is provided at the end of the rotating rod. The transmission assembly includes a fixed sleeve, a rocker arm, and a drive rod. One end of the rocker arm is provided with a fixed sleeve, which is fixedly fitted onto the striped surface. The other end of the rocker arm is rotatably connected to the drive rod via a pin. The end of the drive rod is provided with a rotating shaft, which is rotatably connected to the mounting base via the rotating shaft.

2. The multilayer circuit board as described in claim 1, characterized in that, The fixing clamp includes a clamping plate and a second rubber pad. Each set of fixing clamps has two clamping plates, which are distributed in a parallel manner and are fixedly connected to the guard plate by bolts. The two clamping plates are provided with a second rubber pad on their inner sides, and the second rubber pad is located between the clamping plate and the multilayer circuit board body.

3. The multilayer circuit board as described in claim 1, characterized in that, The support block includes a sliding rod, a support circular plate, a compression spring, and a mounting groove. The mounting groove is opened on one side of the support block, and a sliding rod is provided at the mounting groove. The sliding rod is slidably connected to the support block, and a support circular plate is provided at the end of the sliding rod. The support circular plate is in contact with the multilayer circuit board body. A compression spring is fitted on the sliding rod, and the compression spring is supported between the support circular plate and the support block.

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