Discharging and transferring device of x-ray online detection machine

Abstract

The invention relates to the technical field of x-ray online detection machines, and discloses a discharging and transferring device of an x-ray online detection machine, which comprises a damping assembly, the damping assembly comprises a connector III, one end, far away from a shell, of a connecting plate II is fixedly connected with the connector III, the inner wall of the connector III is rotatably connected with an elastic arc-shaped rod II, and the elastic arc-shaped rod II is fixedly connected with the connector III. A third connecting buckle is rotatably connected to the end, away from the third connecting head, of the second elastic arc-shaped rod, a fourth sliding rod is slidably connected to the inner wall of the third connecting buckle, fourth connecting heads are fixedly connected to the two ends of the fourth sliding rod, the outer wall of the fourth sliding rod is sleeved with a second spring, and one end of the second spring is fixedly connected with the third connecting buckle. Through the arrangement of the damping assembly, when the electric power board enters the groove of the placing plate, under the action of the second elastic arc-shaped rod and the second spring, the impact force of falling of the circuit board is converted into elasticity, and damage to the circuit board is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of x-ray online inspection machines, in particular to a material unloading and loading device of an x-ray online inspection machine. Background Art

[0002] X-ray detectors use low-energy X-rays without damaging the inspected objects to quickly detect the inspected objects. They use high voltage to impact the target material to generate X-ray penetration to detect the internal structure quality of electronic components, semiconductor packaging products, and the welding quality of various types of SMT solder joints.

[0003] The patent application with application number -- discloses a material unloading and transferring device for an x-ray online inspection machine, which uses a vacuum suction nozzle to transfer and unload materials. The suction and transfer force is applied to the surface of the material, thereby avoiding the phenomenon of material damage caused by the claw structure when the material is transferred. At the same time, a first suction nozzle assembly and a second suction nozzle assembly are provided to increase the contact area with the material, thereby improving the stability of material transfer and unloading.

[0004] When the above-mentioned device fixes the circuit board through the nozzle assembly, the nozzle may not fit well with the circuit board due to the different sizes and positions of electronic components on the circuit board, resulting in a gap between the nozzle and the circuit board, which may easily destroy the vacuum state in the nozzle, causing the circuit board to detach from the device and fall off, causing damage to the circuit board. Summary of the invention

[0005] The object of the present invention is to provide a material unloading and loading device for an X-ray online inspection machine to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a material unloading and loading device of an x-ray online inspection machine, comprising a guide rail, wherein the inner wall of the guide rail is slidably connected with a slider 1, and the slider 1 is fixedly connected with a square plate on one side away from the inner wall of the guide rail, and the two sides of the square plate are fixedly connected with connecting columns, and the upper and lower ends of the two connecting columns are fixedly connected with a connecting head 1, and a sliding rod 1 is arranged on the outer side of one of the connecting columns, and the two ends of the sliding rod 1 are fixedly connected with the connecting head 1, and a motor 1 is arranged on the outer side of the other connecting column, and the bottom of the motor 1 is fixedly connected with the connecting head 1, and the output end of the motor 1 is fixedly connected with a threaded rod 1, and the threaded rod 1 penetrates the connecting head 1, and the end of the threaded rod 1 away from the motor 1 is rotatably connected with the connecting head 1. The purpose of such a setting is to drive the storage mechanism to move up and down by starting the motor 1, so that the circuit board can be placed in a suitable position, and also includes: The unloading mechanism comprises a sliding rod 2 fixedly connected to the front end of the square plate, the outer wall of the sliding rod 2 is slidably connected to an annular frame, both sides of the annular frame are provided with sliding grooves, the end of the annular frame away from the sliding rod 2 is fixedly connected to the motor 2, the output end of the motor 2 is fixedly connected to the threaded rod 2, and the inner wall of the sliding groove is slidably connected to the moving component, the purpose of such a setting is to fix the suction nozzle component from the bottom of the circuit board to prevent the suction nozzle from touching the electronic components on the circuit board, which will cause the suction nozzle to fail to fit the circuit board well and prevent the circuit board from falling off; The storage mechanism includes a slider three slidably connected to the outer wall of a slide rod one, the threaded rod one is meshed with the slider three, one side of the slider three is fixedly connected to a shell, the inner wall of the shell is fixedly connected to a connecting plate two, and the inner wall of the shell is fixedly connected to a placement component.

[0007] According to the above technical scheme, the bottom of the annular frame is fixedly connected with a rotating buckle one, the outer wall of the rotating buckle one is fixedly connected with a support rod, the end of the support rod away from the rotating buckle one is fixedly connected with a rotating buckle two, the front end of the square plate is fixedly connected with the rotating buckle two, the central axis of the support rod is rotatably connected with a connecting buckle one, the end of the connecting buckle one away from the support rod is rotatably connected with a push rod, the end of the push rod away from the connecting buckle one is rotatably connected with a rotating buckle three, and the front end of the square plate is fixedly connected with a rotating buckle three. The purpose of such a setting is to allow the suction nozzle to move up and down by setting the push rod and the support rod, while also reinforcing the annular frame to prevent equipment damage caused by insufficient supporting force.

[0008] According to the above technical solution, the moving component includes a slider 2, the outer wall of the slider 2 is slidably connected to the slide groove, the top of the slider 2 is fixedly connected to an L-shaped plate, one side of the L-shaped plate is fixedly connected to a connecting plate 1, the threaded rod 2 is meshed with the connecting plate 1, and the top of the L-shaped plate is fixedly connected to a suction nozzle assembly. The purpose of this arrangement is to drive the moving component to move back and forth by starting the motor 2, so that the circuit board after fixation can be sent into the storage component.

[0009] According to the above technical scheme, the suction nozzle assembly includes a base, the bottom of the base is fixedly connected to the L-shaped plate, the side of the base away from the L-shaped plate is fixedly connected with a spring 1, the end of the spring 1 away from the base is fixedly connected with a connecting buckle 2, the end of the connecting buckle 2 away from the spring 1 is rotatably connected with an elastic arc rod 1, the end of the elastic arc rod 1 away from the connecting buckle 2 is fixedly connected with an annular rod, the inner wall of the annular rod is fixedly connected with an air bag, the top of the air bag is fixedly connected with a vacuum suction nozzle, and the bottom of the air bag is fixedly connected to the base. The purpose of such a setting is to set the suction nozzle assembly so that the suction nozzle can shrink to a certain extent when it touches the circuit board to prevent the suction nozzle from damaging the circuit board. At the same time, in the process of moving the circuit board into the placement plate, the vacuum suction nozzle can move up and down along the trajectory of the placement plate under the action of the spring and the elastic arc plate 1 without falling off the surface of the circuit board, thereby enhancing the fixing effect.

[0010] According to the above technical solution, the placement component includes a connector 2, the inner wall of the shell is fixedly connected to the connector 2, one side of the connector 2 is fixedly connected to a slide rod 3, the outer wall of the slide rod 3 is slidably connected to a slide block 4, and the end of the slide block 4 away from the shell is fixedly connected to a placement plate.

[0011] According to the above technical solution, the inner wall of the placement plate is rotatably connected to a roller, the inner wall of the placement plate is fixedly connected to an elastic annular plate, the side of the elastic annular plate away from the placement plate is fixedly connected to a clamping plate, and the bottom of the placement plate is fixedly connected to a shock absorbing assembly. The purpose of this arrangement is to set up multiple placement assemblies in the storage mechanism so that the cover device can unload multiple circuit boards at one time. At the same time, by setting up the placement assembly, the circuit board can be better fixed under the action of the elastic annular plate and the clamping plate. By setting up the roller, the planar friction between the circuit board and the placement plate bracket is changed to rolling friction, thereby reducing the damage caused by friction to the power board.

[0012] According to the above technical scheme, the shock absorbing assembly includes a connecting head three, the end of the connecting plate two away from the shell is fixedly connected to the connecting head three, the inner wall of the connecting head three is rotatably connected with an elastic arc rod two, the end of the elastic arc rod two away from the connecting head three is rotatably connected with a connecting buckle three, the inner wall of the connecting buckle three is slidably connected with a sliding rod four, both ends of the sliding rod four are fixedly connected to the connecting head four, the outer wall of the sliding rod four is sleeved with a spring two, one end of the spring two is fixedly connected to the connecting buckle three, the end of the spring two away from the connecting buckle three is fixedly connected to the connecting head four, and the bottom of the placement plate is fixedly connected to the connecting head four, the purpose of such arrangement is to set up a shock absorbing assembly, so that when the power board enters the groove of the placement plate, under the action of the elastic arc rod two and the spring two, the impact force of the circuit board falling is converted into elasticity, thereby reducing damage to the circuit board.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. The present invention fixes the nozzle assembly from the bottom of the circuit board to prevent the nozzle from touching the electronic components on the circuit board, which would cause the nozzle to fail to fit well with the circuit board, thereby preventing the circuit board from falling off.

[0014] 2. The present invention provides a push rod and a support rod, so that the suction nozzle can move up and down, and the annular frame can be reinforced to prevent equipment damage caused by insufficient supporting force.

[0015] 3. The present invention provides a suction nozzle assembly so that the suction nozzle can shrink to a certain extent when it touches the circuit board, thereby preventing the suction nozzle from damaging the circuit board. At the same time, when the circuit board is moved into the placement plate, the vacuum suction nozzle can move up and down along the trajectory of the placement plate under the action of the spring and the elastic arc plate, and will not fall off the surface of the circuit board, thereby enhancing the fixing effect.

[0016] 4. The present invention arranges a plurality of placement components in the storage mechanism so that the cover device can unload a plurality of circuit boards at one time. At the same time, by arranging the placement components, the circuit boards are better fixed under the action of the elastic annular plate and the clamping plate. By arranging the rollers, the plane friction between the circuit board and the placement plate bracket is changed to rolling friction, thereby reducing the damage caused by friction to the power board.

[0017] 5. The present invention provides a shock-absorbing assembly so that when the power board enters the groove of the placement board, the impact force of the circuit board falling is converted into elasticity under the action of the elastic arc rod 2 and the spring 2, thereby reducing damage to the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall internal structure of the present invention; Figure 3 It is a schematic diagram of a material discharging mechanism of the present invention; Figure 4 is a schematic diagram of a mobile assembly of the present invention; Figure 5 is a schematic diagram of a nozzle assembly of the present invention; Figure 6 is a schematic diagram of a storage mechanism of the present invention; Figure 7 is a schematic diagram of the placement assembly of the present invention; Figure 8 is a schematic diagram of a shock absorbing assembly of the present invention; In the figure: 1. guide rail; 101. slider 1; 102. square plate; 103. connecting column; 104. connector 1; 105. slide bar 1; 106. motor 1; 107. threaded rod 1; 2. unloading mechanism; 201. slide bar 2; 202. ring frame; 203. slide slot; 204. motor 2; 205. threaded rod 2; 206. rotating buckle 1; 207. support rod; 208. rotating buckle 2; 209. connecting buckle 1; 2010. push rod; 2011. rotating buckle 3; 21. moving assembly; 211. slider 2; 212. L-shaped plate; 213. connecting plate 1; 22. nozzle assembly; 221. base ; 222, spring one; 223, connecting buckle two; 224, elastic arc rod one; 225, annular rod; 226, airbag; 227, vacuum nozzle; 3, storage mechanism; 301, shell; 302, slider three; 303, connecting plate two; 31, placement component; 311, connector two; 312, slide bar three; 313, slider four; 314, placement plate; 315, roller; 316, elastic annular plate; 317, clamping plate; 32, shock absorbing component; 321, connector three; 322, elastic arc rod two; 323, connecting buckle three; 324, slide bar four; 325, connector four; 326, spring two. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] For example, see Figure 1-5The present invention provides a technical solution: a material unloading and transferring device for an x-ray online inspection machine, comprising a guide rail 1, a slider 101 is slidably connected to the inner wall of the guide rail 1, a square plate 102 is fixedly connected to the side of the slider 101 away from the inner wall of the guide rail 1, both sides of the square plate 102 are fixedly connected to connecting columns 103, the upper and lower ends of the two connecting columns 103 are fixedly connected to connectors 104, a sliding rod 105 is arranged on the outer side of one of the connecting columns 103, and both ends of the sliding rod 105 are fixedly connected to the connector 104, A motor 106 is arranged on the outside of another connecting column 103. The bottom of the motor 106 is fixedly connected to the connector 104. The output end of the motor 106 is fixedly connected to a threaded rod 107. The threaded rod 107 penetrates the connector 104. The end of the threaded rod 107 away from the motor 106 is rotatably connected to the connector 104. The purpose of such arrangement is to start the motor 106, thereby driving the spiral rod 1 to rotate, so that the storage mechanism 3 can move up and down along the track of the slide rod 105. It also includes: The unloading mechanism 2 includes a slide bar 201 fixedly connected to the front end of the square plate 102, the outer wall of the slide bar 201 is slidably connected to an annular frame 202, both sides of the annular frame 202 are provided with a slide groove 203, the end of the annular frame 202 away from the slide bar 201 is fixedly connected to a motor 204, the output end of the motor 204 is fixedly connected to a threaded rod 205, the inner wall of the slide groove 203 is slidably connected to a moving component 21, the bottom of the annular frame 202 is fixedly connected to a rotating buckle 206, the outer wall of the rotating buckle 206 is fixedly connected to a support rod 207, the support rod 207 is away from the rotating buckle 20 6 is fixedly connected with a rotating buckle 208 at one end, the front end of the square plate 102 is fixedly connected with the rotating buckle 208, the central axis of the support rod 207 is rotatably connected with a connecting buckle 1 209, the end of the connecting buckle 1 209 away from the support rod 207 is rotatably connected with a push rod 2010, the end of the push rod 2010 away from the connecting buckle 1 209 is rotatably connected with a rotating buckle 3 2011, and the front end of the square plate 102 is fixedly connected with the rotating buckle 3 2011. The purpose of this arrangement is to enable the support rod 207 to lift or lower the suction nozzle assembly 22 under the action of the connecting buckle by starting the push rod 2010.

[0021] The moving component 21 includes a slider 211, the outer wall of the slider 211 is slidably connected to the slide groove 203, the top of the slider 211 is fixedly connected to an L-shaped plate 212, one side of the L-shaped plate 212 is fixedly connected to a connecting plate 1 213, the threaded rod 205 is meshed with the connecting plate 1 213, and the top of the L-shaped plate 212 is fixedly connected to a suction nozzle assembly 22. The purpose of this arrangement is to start the motor 204 to drive the screw rod 2 to rotate, and drive the L-shaped plate 212 to move forward and backward along the track of the slide groove 203 through the connecting plate 1 213.

[0022] The nozzle assembly 22 includes a base 221, the bottom of the base 221 is fixedly connected to the L-shaped plate 212, a spring 222 is fixedly connected to the side of the base 221 away from the L-shaped plate 212, the end of the spring 222 away from the base 221 is fixedly connected to a connecting buckle 223, the end of the connecting buckle 223 away from the spring 222 is rotatably connected to an elastic arc rod 224, the end of the elastic arc rod 224 away from the connecting buckle 223 is fixedly connected to an annular rod 225, the inner wall of the annular rod 225 is fixedly connected to an air bag 226, and the air bag 226 A vacuum nozzle 227 is fixedly connected to the top, and the bottom of the airbag 226 is fixedly connected to the base 221. The purpose of this arrangement is that when the vacuum nozzle 227 contacts the circuit board, the airbag 226 will shrink, and the spring 222 and the elastic arc rod 224 will also deform to convert the pressure into elastic force. When the moving component 21 moves to the placement component 31, the spring 222, the elastic arc rod 224, and the airbag 226 will be compressed or shrunk according to the shape of the placement plate 314, so that the circuit board can fit on the surface of the placement plate 314.

[0023] Embodiment 2 is different from Embodiment 1 in that: Figure 6-Figure 8 As shown, the storage mechanism 3 includes a slider three 302 slidably connected to the outer wall of the slide rod one 105, the threaded rod one 107 is engaged with the slider three 302, one side of the slider three 302 is fixedly connected to the shell 301, the inner wall of the shell 301 is fixedly connected to the connecting plate two 303, and the inner wall of the shell 301 is fixedly connected to the placement component 31.

[0024] The placement component 31 includes a second connector 311, the inner wall of the shell 301 is fixedly connected to the second connector 311, one side of the connector 311 is fixedly connected to a slide bar 312, the outer wall of the slide bar 312 is slidably connected to a slider 4 313, the end of the slider 4 313 away from the shell 301 is fixedly connected to a placement plate 314, the inner wall of the placement plate 314 is rotatably connected to a roller 315, the inner wall of the placement plate 314 is fixedly connected to an elastic annular plate 316, the side of the elastic annular plate 316 away from the placement plate 314 is fixedly connected to a clamping plate 317, and the bottom of the placement plate 314 is fixedly connected to a shock absorbing component 32. The purpose of this arrangement is to fix the circuit board placed in the placement plate 314 under the action of the elastic annular plate 316 and the clamping plate 317 to prevent the circuit board from falling off.

[0025] The shock absorbing assembly 32 includes a connector 321, an end of the connector plate 2 303 away from the housing 301 is fixedly connected to the connector 321, the inner wall of the connector 321 is rotatably connected to an elastic arc rod 2 322, an end of the elastic arc rod 2 322 away from the connector 321 is rotatably connected to a connector buckle 3 323, the inner wall of the connector buckle 323 is slidably connected to a slide bar 4 324, both ends of the slide bar 4 324 are fixedly connected to a connector 4 325, and the outer wall of the slide bar 4 324 is sleeved with a There is a spring 2 326, one end of which is fixedly connected to the connecting buckle 323, and the end of the spring 2 326 away from the connecting buckle 323 is fixedly connected to the connecting head 4 325, and the bottom of the placement plate 314 is fixedly connected to the connecting head 4 325. The purpose of this arrangement is to convert the force of the circuit board during the falling process into elastic force under the action of the spring 2 326 and the elastic arc rod 2 322 when the circuit board falls into the inner wall of the placement plate 314, thereby reducing damage to the circuit board.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A material unloading and loading device for an X-ray online inspection machine, comprising a guide rail (1), wherein a slider (101) is slidably connected to the inner wall of the guide rail (1), a square plate (102) is fixedly connected to the side of the slider (101) away from the inner wall of the guide rail (1), both sides of the square plate (102) are fixedly connected to connecting columns (103), upper and lower ends of two connecting columns (103) are fixedly connected to connecting heads (104), a sliding rod (105) is arranged on the outer side of one of the connecting columns (103), and the Both ends of the sliding rod 1 (105) are fixedly connected to the connector 1 (104); a motor 1 (106) is arranged on the outer side of the other connecting column (103); the bottom of the motor 1 (106) is fixedly connected to the connector 1 (104); the output end of the motor 1 (106) is fixedly connected to a threaded rod 1 (107); the threaded rod 1 (107) passes through the connector 1 (104); the end of the threaded rod 1 (107) away from the motor 1 (106) is rotatably connected to the connector 1 (104); it is characterized in that , also includes: The material discharge mechanism (2) comprises a second slide bar (201) fixedly connected to the front end of the square plate (102), the outer wall of the second slide bar (201) being slidably connected to an annular frame (202), both sides of the annular frame (202) being provided with a slide groove (203), an end of the annular frame (202) away from the second slide bar (201) being fixedly connected to a second motor (204), an output end of the second motor (204) being fixedly connected to a second threaded rod (205), and an inner wall of the slide groove (203) being slidably connected to a moving component (21); The storage mechanism (3) comprises a slider three (302) slidably connected to the outer wall of the slide rod one (105), the threaded rod one (107) meshing with the slider three (302), one side of the slider three (302) is fixedly connected to a shell (301), the inner wall of the shell (301) is fixedly connected to a connecting plate two (303), and the inner wall of the shell (301) is fixedly connected to a placement component (31).

2. The material unloading and loading device of an X-ray online inspection machine according to claim 1, characterized in that: The bottom of the annular frame (202) is fixedly connected with a rotating buckle 1 (206), the outer wall of the rotating buckle 1 (206) is fixedly connected with a support rod (207), the end of the support rod (207) away from the rotating buckle 1 (206) is fixedly connected with a rotating buckle 2 (208), the front end of the square plate (102) is fixedly connected with the rotating buckle 2 (208), the central axis of the support rod (207) is rotatably connected with a connecting buckle 1 (209), the end of the connecting buckle 1 (209) away from the support rod (207) is rotatably connected with a push rod (210), the end of the push rod (210) away from the connecting buckle 1 (209) is rotatably connected with a rotating buckle 3 (211), and the front end of the square plate (102) is fixedly connected with the rotating buckle 3 (211).

3. The material unloading and loading device of an X-ray online inspection machine according to claim 1, characterized in that: The moving assembly (21) comprises a second slider (211), the outer wall of the second slider (211) being slidably connected to the slide groove (203), the top of the second slider (211) being fixedly connected to an L-shaped plate (212), one side of the L-shaped plate (212) being fixedly connected to a first connecting plate (213), the second threaded rod (205) being meshed with the first connecting plate (213), and the top of the L-shaped plate (212) being fixedly connected to a nozzle assembly (22).

4. The material unloading and loading device of an X-ray online inspection machine according to claim 3, characterized in that: The suction nozzle assembly (22) comprises a base (221), the bottom of the base (221) is fixedly connected to the L-shaped plate (212), a side of the base (221) away from the L-shaped plate (212) is fixedly connected to a spring 1 (222), an end of the spring 1 (222) away from the base (221) is fixedly connected to a connecting buckle 2 (223), an end of the connecting buckle 2 (223) away from the spring 1 (222) is rotatably connected to an elastic arc-shaped rod 1 (224), an end of the elastic arc-shaped rod 1 (224) away from the connecting buckle 2 (223) is fixedly connected to an annular rod (225), an inner wall of the annular rod (225) is fixedly connected to an air bag (226), a top of the air bag (226) is fixedly connected to a vacuum suction nozzle (227), and the bottom of the air bag (226) is fixedly connected to the base (221).

5. The material unloading and loading device of an X-ray online inspection machine according to claim 1, characterized in that: The placement component (31) comprises a second connector (311), the inner wall of the outer shell (301) is fixedly connected to the second connector (311), a sliding bar (312) is fixedly connected to one side of the second connector (311), a sliding bar (313) is slidably connected to the outer wall of the sliding bar (312), and a placement plate (314) is fixedly connected to one end of the sliding bar (313) away from the outer shell (301).

6. The material unloading and loading device of an X-ray online inspection machine according to claim 5, characterized in that: The inner wall of the placement plate (314) is rotatably connected to a roller (315), the inner wall of the placement plate (314) is fixedly connected to an elastic annular plate (316), a side of the elastic annular plate (316) away from the placement plate (314) is fixedly connected to a clamping plate (317), and the bottom of the placement plate (314) is fixedly connected to a shock absorbing assembly (32).

7. The material unloading and loading device of an X-ray online inspection machine according to claim 6, characterized in that: The shock absorbing assembly (32) comprises a third connector (321), one end of the second connector plate (303) away from the housing (301) is fixedly connected to the third connector (321), the inner wall of the third connector (321) is rotatably connected to a second elastic arc rod (322), the end of the second elastic arc rod (322) away from the third connector (321) is rotatably connected to a third connector buckle (323), the inner wall of the third connector buckle (323) is slidably connected to a fourth slide rod (324), both ends of the fourth slide rod (324) are fixedly connected to a fourth connector (325), the outer wall of the fourth slide rod (324) is sleeved with a second spring (326), one end of the second spring (326) is fixedly connected to the third connector buckle (323), the end of the second spring (326) away from the third connector buckle (323) is fixedly connected to the fourth connector (325), and the bottom of the placement plate (314) is fixedly connected to the fourth connector (325).

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