Community display board

Abstract

The utility model discloses a community display board which comprises a bottom plate and a display board, a first side plate and a second side plate are vertically arranged on the bottom plate, and the display board is arranged between the first side plate and the second side plate in a sliding mode in the length direction of the first side plate and the length direction of the second side plate. A first connecting plate and a second connecting plate are sequentially and slidably arranged on the face, close to the bottom plate, of the display plate, one end of the first connecting plate abuts against the first side plate, the end, away from the first connecting plate, of the second connecting plate abuts against the second side plate, a first through hole is formed in the first connecting plate, a second through hole is formed in the second connecting plate, and the display plate slides close to the bottom plate. The first through hole coincides with the second through hole, so that water in the display board is discharged from the first through hole and the second through hole. According to the community display board provided by the utility model, the display board moves downwards due to the additional gravity of rainwater, and the first through hole and the second through hole coincide, so that the drainage function is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of display boards, and in particular relates to a community display board. Background Art

[0002] Commonly used equipment in community properties include community display boards to ensure that residents can learn about community announcements in a timely manner. However, existing community display boards still have some defects when used.

[0003] For example, publication number CN202020568624.4 discloses a bulletin display device for smart property management. When a display screen fails, the small transmission motor is first started to drive the screw to rotate, and then the spiral sleeve is driven down, thereby driving the connecting rod to descend, thereby driving the mounting frame to descend until the mounting frame is separated from the glass protection frame. The small transmission motor is then turned off, and the two clamps are removed from the mounting frame, the display screen protection frame is removed from the mounting frame, a new display screen is replaced, and then the two pressure plates are re-fixed to the mounting frame and the display screen protection frame is fixed. The small transmission motor is then started again to drive the mounting frame to rise until the display screen enters the glass protection frame and reaches a suitable height. The small transmission motor is then turned off to complete the disassembly and assembly of the display screen. The operation is simple, fast and convenient. Because of the protection of the mounting frame, the display screen will not be damaged during installation, thereby better protecting the display screen. Although the above-mentioned display device can realize the function of convenient disassembly and assembly when in use, in actual use, it cannot automatically drain water when rainwater enters the interior, and the chassis cannot be automatically unfolded after placement, and the stability is insufficient.

[0004] Therefore, it is urgent to design a community display board to solve the problem that the above-mentioned display device cannot automatically drain water when rainwater enters the interior during use. Utility Model Content

[0005] In order to solve the technical problem that the display device mentioned in the background technology cannot automatically drain water when rainwater enters the interior during use, a community display board is provided to solve the above problem.

[0006] To achieve the above purpose, the specific technical solution of the community display board of the utility model is as follows:

[0007] A community display board comprises a bottom plate and a display board, wherein a first side plate and a second side plate are vertically arranged on the bottom plate, the display board is slidably arranged between the first side plate and the second side plate along the length direction of the first side plate and the second side plate, a first connecting plate and a second connecting plate are slidably arranged in sequence on a side of the display board close to the bottom plate, the first connecting plate and the second connecting plate are overlapped, one end of the first connecting plate abuts against the first side plate, and one end of the second connecting plate away from the first connecting plate abuts against the second side plate, a first through hole is provided on the first connecting plate, and a second through hole is provided on the second connecting plate, the display board slides close to the bottom plate, and the first through hole coincides with the second through hole, so that water in the display board is discharged from the first through hole and the second through hole.

[0008] Furthermore, the first side plate is provided with a first movable groove along the length direction of the first side plate, the second side plate is provided with a second movable groove along the length direction of the second side plate, one end of the first connecting plate slides along the first movable groove, and the end of the second connecting plate away from the first connecting plate slides along the second movable groove.

[0009] Furthermore, a first curved surface is provided at one end of the first movable groove close to the bottom plate, a second curved surface is provided at one end of the second movable groove close to the bottom plate, the first connecting plate slides out of the first curved surface, the first side plate squeezes the first connecting plate in a direction close to the second side plate, the second connecting plate slides out of the second curved surface, and the second side plate squeezes the second connecting plate in a direction close to the first side plate, so that the first through hole and the second through hole coincide with each other.

[0010] Furthermore, one end of the first connecting plate close to the first arc surface is an arc-shaped end, and one end of the second connecting plate close to the second arc surface is an arc-shaped end.

[0011] Furthermore, it also includes a first elastic member and a second elastic member, a first protrusion is provided on the first connecting plate, a second protrusion is provided on the second connecting plate, one end of the first elastic member is connected to the first protrusion, the other end of the first elastic member is connected to the second connecting plate, one end of the second elastic member is connected to the second protrusion, and the other end of the second elastic member is connected to the first connecting plate.

[0012] Furthermore, it also includes a first inner plate and a second inner plate, and the first inner plate and the second inner plate are slidably arranged on a side of the bottom plate away from the display plate.

[0013] Furthermore, it also includes a middle plate, which is clamped between the first inner plate and the second inner plate, a third elastic member is arranged between the middle plate and the first inner plate, and a fourth elastic member is arranged between the middle plate and the second inner plate. The third elastic member drives the first inner plate to move away from the middle plate, and the fourth elastic member drives the second inner plate to move away from the middle plate.

[0014] Furthermore, it also includes a first clamping assembly and a second clamping assembly. The first clamping assembly is arranged on both sides of the first inner plate and clamped with the bottom plate, and the second clamping assembly is arranged on both sides of the second inner plate and clamped with the bottom plate.

[0015] Furthermore, the first clamping assembly includes a clamping block, a first groove is opened on the bottom plate, the clamping block is arranged on the first inner plate, the clamping block is clamped with the first groove to fix the bottom plate and the first inner plate, and the clamping block is separated from the first groove so that the third elastic member drives the first inner plate to move away from the middle plate.

[0016] Furthermore, it also includes a trigger rod, a docking block is arranged between the first inner plate and the second inner plate, the trigger rod abuts against the docking block to separate the first clamping assembly and the second clamping assembly from the bottom plate respectively, the third elastic member drives the first inner plate to move away from the middle plate, and the fourth elastic member drives the second inner plate to move away from the middle plate.

[0017] The community display board of the utility model has the following advantages:

[0018] A first connecting plate and a second connecting plate are slidably arranged in sequence on a side of the display board close to the bottom plate, one end of the first connecting plate abuts against the first side plate, and an end of the second connecting plate away from the first connecting plate abuts against the second side plate, a first through hole is provided on the first connecting plate, and a second through hole is provided on the second connecting plate, so that when too much rainwater accumulates inside, the device can move downward due to the additional gravity increased by the rainwater, thereby squeezing the first connecting plate and the second connecting plate respectively through the outer walls of the first side plate and the second side plate, so that the first connecting plate and the second connecting plate can be automatically squeezed back to the side, and the first through hole coincides with the second through hole, so that water in the display board is discharged from the first through hole and the second through hole, thereby realizing an automatic drainage function. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of the community display board of the utility model;

[0020] Figure 2 It is a front cross-sectional view of the community display board of the utility model;

[0021] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0022] Figure 4 for Figure 2 The enlarged structural diagram at B in the middle;

[0023] Figure 5 This is a top sectional view of the bottom plate of the community display board of the utility model;

[0024] Figure 6 for Figure 5 The enlarged structural diagram at C in the middle;

[0025] Figure 7 This is a schematic diagram of the structure of the first connecting plate and the second connecting plate of the utility model;

[0026] Figure 8This is a system block diagram of the utility model.

[0027] Description of the markings in the figure:

[0028] 1. first side plate; 11. first movable groove; 111. first arc surface; 12. first slide groove; 13. spring; 2. second side plate; 3. display plate; 4. first connecting plate; 41. first through hole; 42. first protrusion; 5. second connecting plate; 51. second through hole; 52. second protrusion; 6. first elastic member; 7. second elastic member; 8. first inner plate; 9. second inner plate; 100. bottom plate; 101. middle plate; 102. first clamping assembly; 103. second clamping assembly; 104. trigger rod; 105. docking block; 106. third elastic member; 107. fourth elastic member. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0033] Please refer to the attached Figure 1 To Attachment Figure 8 The utility model is described in detail.

[0034] like Figure 1 and Figure 2 As shown, the community display board in the utility model includes a bottom plate 100 and a display board 3, the bottom plate 100 is vertically provided with a first side plate 1 and a second side plate 2, the display board 3 is slidably arranged between the first side plate 1 and the second side plate 2 along the length direction of the first side plate 1 and the second side plate 2, the display board 3 is slidably arranged with a first connecting plate 4 and a second connecting plate 5 in sequence on a side of the display board 3 close to the bottom plate 100, the first connecting plate 4 and the second connecting plate 5 are overlapped, one end of the first connecting plate 4 abuts against the first side plate 1, and one end of the second connecting plate 5 away from the first connecting plate 4 abuts against the second side plate 2, the first connecting plate 4 is provided with a first through hole 41, and the second connecting plate 5 is provided with a second through hole 51, the display board 3 slides close to the bottom plate 100, and the first through hole 41 coincides with the second through hole 51, so that water in the display board 3 is discharged from the first through hole 41 and the second through hole 51.

[0035] In this embodiment, Figure 8 As shown, a camera is arranged on the top of the display board 3, and the camera has a facial recognition module. The output end of the facial recognition module is connected to the body temperature detection module, and the output end of the body temperature detection module is connected to the data processing module. The data processing module is connected to the alarm and the access control module, so that the device can automatically detect the body temperature. When the body temperature is normal, the person can enter the community normally, and an alarm will be triggered when the body temperature is too high.

[0036] A first connecting plate 4 and a second connecting plate 5 are slidably arranged in sequence on a side of the display board 3 close to the bottom plate 100, one end of the first connecting plate 4 abuts against the first side plate 1, and one end of the second connecting plate 5 away from the first connecting plate 4 abuts against the second side plate 2, a first through hole 41 is provided on the first connecting plate 4, and a second through hole 51 is provided on the second connecting plate 5, so that when too much rainwater accumulates inside, the additional gravity increased by the rainwater causes the display board 3 to move downward, thereby squeezing the first connecting plate 4 and the second connecting plate 5 through the outer walls of the first side plate 1 and the second side plate 2 respectively, so that the first connecting plate 4 and the second connecting plate 5 can be automatically squeezed back to the side, and the first through hole 41 coincides with the second through hole 51, so that the water in the display board 3 is discharged from the first through hole 41 and the second through hole 51, thereby realizing the automatic drainage function.

[0037] Further, if Figures 1 to 3 As shown, the first side plate 1 is provided with a first movable groove 11 along the length direction of the first side plate 1, the second side plate 2 is provided with a second movable groove along the length direction of the second side plate 2, one end of the first connecting plate 4 slides along the first movable groove 11, and the end of the second connecting plate 5 away from the first connecting plate 4 slides along the second movable groove. The end of the first movable groove 11 close to the bottom plate 100 is provided with a first curved surface 111, and the end of the second movable groove close to the bottom plate 100 is provided with a second curved surface, the first connecting plate 4 slides out of the first curved surface 111, the first side plate 1 presses the first connecting plate 4 in the direction close to the second side plate 2, the second connecting plate 5 slides out of the second curved surface, and the second side plate 2 presses the second connecting plate 5 in the direction close to the first side plate 1, so that the first through hole 41 and the second through hole 51 overlap. The end of the first connecting plate 4 close to the first curved surface 111 is an arc end, and the end of the second connecting plate 5 close to the second curved surface is an arc end. By providing the first curved surface 111 and the first curved end, it is convenient for the first connecting plate 4 to smoothly detach from the first movable groove 11 or smoothly return to the first movable groove 11. By providing the second curved surface and the second curved end, it is convenient for the second connecting plate 5 to smoothly detach from the second movable groove or smoothly return to the second movable groove. When too much rainwater accumulates inside the display board 3, the additional gravity increased by the rainwater causes the display board 3 to move downward, thereby squeezing the first connecting plate 4 and the second connecting plate 5 through the outer walls of the first side plate 1 and the second side plate 2 respectively, so that the first connecting plate 4 and the second connecting plate 5 can be automatically squeezed back to the side, and the first through hole 41 coincides with the second through hole 51, so that the water in the display board 3 is discharged from the first through hole 41 and the second through hole 51, and the automatic drainage function is realized.

[0038] Further, if Figure 2As shown, in order to facilitate the display board 3 to slide smoothly on the first side panel 1 and the second side panel 2, a first slide groove 12 is provided on the first side panel 1, and a second slide groove is also provided on the second side panel 2. Both ends of the display board 3 are slidably arranged in the first slide groove 12 and the second slide groove respectively. In order to achieve smooth movement of the display board 3 when sliding along the first side panel 1 and the second side panel 2, a spring 13 is also provided in the first slide groove 12, one end of the spring 13 is fixed to the bottom wall of the first slide groove 12, and a slider is fixed to the other end of the spring 13, and the slider is fixedly connected to one end of the display board 3. Similarly, a spring and a slider are also provided in the second slide groove, and the slider in the second slide groove is connected to the other end of the display board 3. The display board 3 is buffered by providing the spring, so that the display board 3 moves smoothly.

[0039] Further, if Figure 4 and Figure 7 As shown, the community display board in the utility model also includes a first elastic member 6 and a second elastic member 7, a first protrusion 42 is provided on the first connecting plate 4, and a second protrusion 52 is provided on the second connecting plate 5, one end of the first elastic member 6 is connected to the first protrusion 42, and the other end of the first elastic member 6 is connected to the second connecting plate 5, one end of the second elastic member 7 is connected to the second protrusion 52, and the other end of the second elastic member 7 is connected to the first connecting plate 4. Through the elastic force of the first spring 13 on the second connecting plate 5 and the elastic force of the second spring 13 on the first connecting plate 4, the first connecting plate 4 and the second connecting plate 5 can be respectively abutted against the first movable groove 11 and the second movable groove. When too much rainwater accumulates inside the display board 3, the additional gravity of the rainwater causes the display board 3 to move along the first sliding groove 12 and the second sliding groove. At the same time, the first connecting plate 4 slides downward in the first movable groove 11, and the second connecting plate 5 slides downward in the second movable groove until the arc segment of the first connecting plate 4 is separated from the first curved surface 111, and the arc segment of the second connecting plate 5 is separated from the second curved surface, and the first connecting plate 4 and the second connecting plate 5 are respectively squeezed by the outer walls of the first side plate 1 and the second side plate 2, so that the first connecting plate 4 and the second connecting plate 5 can be automatically squeezed back to the side, and the first through hole 41 coincides with the second through hole 51, so that the water in the display board 3 is discharged from the first through hole 41 and the second through hole 51, thereby realizing the automatic drainage function. When drainage is completed, the weight of the display board 3 becomes lighter, and under the action of the restoring elastic force of the first elastic member 6 and the second elastic member 7, the arcuate end of the first connecting plate 4 enters into the first movable groove 11 from the first arc surface 111, and the arcuate end of the second connecting plate 5 enters into the second movable groove from the second arc surface, so that the display board 3 automatically returns to its initial state.

[0040] Further, if Figure 5 and Figure 6As shown, the small area display board in the utility model further includes a first inner plate 8, a second inner plate 9 and a middle plate 101, and the first inner plate 8 and the second inner plate 9 are slidably arranged on a side of the bottom plate 100 away from the display board 3. The middle plate 101 is sandwiched between the first inner plate 8 and the second inner plate 9, and a third elastic member 106 is arranged between the middle plate 101 and the first inner plate 8, and a fourth elastic member 107 is arranged between the middle plate 101 and the second inner plate 9. The third elastic member 106 drives the first inner plate 8 to move away from the middle plate 101, and the fourth elastic member 107 drives the second inner plate 9 to move away from the middle plate 101. By arranging the first inner plate 8 and the second inner plate 9, the first inner plate 8 and the second inner plate 9 can slide relative to the bottom plate 100, thereby increasing the contact area with the ground and ensuring the stability of the display board 3.

[0041] Further, if Figure 6 As shown, the cell display board in the utility model also includes a first clamping assembly 102 and a second clamping assembly 103. The first clamping assembly 102 is arranged on both sides of the first inner plate 8 and clamped with the bottom plate 100, and the second clamping assembly is arranged on both sides of the second inner plate 9 and clamped with the bottom plate 100. The first clamping assembly 102 includes a clamping block and a clamping block spring. A first groove is provided on the bottom plate 100. The clamping block and the clamping block spring are arranged on the first inner plate 8. The clamping block spring drives the clamping block to clamp with the first groove, so that the bottom plate 100 is fixed to the first inner plate 8. When the clamping block is separated from the first groove, the third elastic member 106 drives the first inner plate 8 to move away from the middle plate 101. When the clamping block is clamped in the groove, the positions of the first inner plate 8 and the bottom plate 100 are relatively fixed. The second clamping assembly 103 has the same structure as the first clamping assembly 102, which will not be repeated here.

[0042] Further, if Figure 2 and Figure 6 As shown, the community display board in the utility model further includes a trigger rod 104, a docking block 105 is provided between the first inner plate 8 and the second inner plate 9, a hole is provided on the middle plate 101, and the docking block 105 is provided at the hole of the middle plate 101. The trigger rod 104 abuts against the docking block 105 to separate the first clamping assembly 102 and the second clamping assembly 103 from the bottom plate 100 respectively, the third elastic member 106 drives the first inner plate 8 to move away from the middle plate 101, and the fourth elastic member 107 drives the second inner plate 9 to move away from the middle plate 101.

[0043] The working principle of the utility model is:

[0044] like Figure 8 As shown, the device uses the facial recognition module in the camera on the top of the display board 3 to identify the person passing through, detects the body temperature through the body temperature detection module, and transmits it to the data processing module. When the body temperature is normal, the communication control module allows the person to enter and exit the community normally. When the body temperature is too high, the alarm is triggered to sound an alarm.

[0045] When the device is placed, the trigger rod 104 can contact the ground, so that the trigger rod 104 moves upward, pushing the docking block 105 so that the two adjacent docking blocks 105 are separated from each other, so that the first inner plate 8 and the second inner plate 9 on the middle plate 101 can be squeezed outward, and the card block will be compressed after the card block is compressed. At this time, the first inner plate 8 is disengaged from the bottom plate 100, and the second inner plate 9 is disengaged from the bottom plate 100. The first inner plate 8 on the device automatically pops out under the elastic force of the third elastic member 106, and the second inner plate 9 automatically pops out under the elastic force of the fourth elastic member 107 , completing the extension of the bottom plate 100, making the device more stable after being placed. When there is too much rainwater in the device, the display plate 3 moves downward, and the spring 13 is compressed until the first connecting plate 4 is disengaged from the first movable groove 11 in the first side plate 1, and the second connecting plate 5 is disengaged from the second movable groove in the second side plate 2. The outer wall of the first side plate 1 will squeeze the first connecting plate 4, and the outer wall of the second side plate 2 will squeeze the second connecting plate 5, so that the first connecting plate 4 and the second connecting plate 5 move inward, thereby compressing the compression spring, and the through holes on the two adjacent connecting plates overlap with each other, realizing the automatic drainage function.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A community display board, characterized in that: The invention comprises a bottom plate and a display plate, wherein a first side plate and a second side plate are vertically arranged on the bottom plate, the display plate is slidably arranged between the first side plate and the second side plate along the length direction of the first side plate and the second side plate, a first connecting plate and a second connecting plate are slidably arranged in sequence on a side of the display plate close to the bottom plate, the first connecting plate and the second connecting plate are overlapped, one end of the first connecting plate abuts against the first side plate, and one end of the second connecting plate away from the first connecting plate abuts against the second side plate, a first through hole is provided on the first connecting plate, and a second through hole is provided on the second connecting plate, the display plate slides close to the bottom plate, and the first through hole coincides with the second through hole, so that water in the display plate is discharged from the first through hole and the second through hole.

2. The community display board according to claim 1, characterized in that: The first side plate is provided with a first movable groove along the length direction of the first side plate, the second side plate is provided with a second movable groove along the length direction of the second side plate, one end of the first connecting plate slides along the first movable groove, and the end of the second connecting plate away from the first connecting plate slides along the second movable groove.

3. The community display board according to claim 2, characterized in that: A first curved surface is provided at one end of the first movable groove close to the bottom plate, a second curved surface is provided at one end of the second movable groove close to the bottom plate, the first connecting plate slides out of the first curved surface, the first side plate squeezes the first connecting plate in a direction close to the second side plate, the second connecting plate slides out of the second curved surface, and the second side plate squeezes the second connecting plate in a direction close to the first side plate, so that the first through hole and the second through hole overlap.

4. The community display board according to claim 3, characterized in that: One end of the first connecting plate close to the first arc surface is an arc end, and one end of the second connecting plate close to the second arc surface is an arc end.

5. The community display board according to claim 1, characterized in that: It also includes a first elastic member and a second elastic member, a first protrusion is provided on the first connecting plate, a second protrusion is provided on the second connecting plate, one end of the first elastic member is connected to the first protrusion, the other end of the first elastic member is connected to the second connecting plate, one end of the second elastic member is connected to the second protrusion, and the other end of the second elastic member is connected to the first connecting plate.

6. The community display board according to claim 1, characterized in that: It also includes a first inner plate and a second inner plate, which are slidably arranged on a side of the bottom plate away from the display plate.

7. The community display board according to claim 6, characterized in that: It also includes a middle plate, which is clamped between the first inner plate and the second inner plate. A third elastic member is arranged between the middle plate and the first inner plate, and a fourth elastic member is arranged between the middle plate and the second inner plate. The third elastic member drives the first inner plate to move away from the middle plate, and the fourth elastic member drives the second inner plate to move away from the middle plate.

8. The community display board according to claim 6, characterized in that: It also includes a first clamping assembly and a second clamping assembly. The first clamping assembly is arranged on both sides of the first inner plate and clamped with the bottom plate, and the second clamping assembly is arranged on both sides of the second inner plate and clamped with the bottom plate.

9. The community display board according to claim 8, characterized in that: The first clamping assembly includes a clamping block, a first groove is opened on the bottom plate, the clamping block is arranged on the first inner plate, the clamping block is clamped with the first groove to fix the bottom plate and the first inner plate, and the clamping block is separated from the first groove so that the third elastic member drives the first inner plate to move away from the middle plate.

10. The community display board according to claim 8, characterized in that: It also includes a trigger rod, a docking block is arranged between the first inner plate and the second inner plate, the trigger rod abuts against the docking block to separate the first clamping assembly and the second clamping assembly from the bottom plate respectively, the third elastic member drives the first inner plate to move away from the middle plate, and the fourth elastic member drives the second inner plate to move away from the middle plate.

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