An anti-loosening fixing device for sensor production

Abstract

The present invention discloses an anti-loosening fixing device for sensor production. The present invention relates to the technical field of sensors and includes a fixing frame. A support leg is fixedly connected to the outer surface of the fixing frame, and a position adjustment device. By providing the position adjustment device, the placement device can be rotated, thereby adjusting the orientation of the sensor. When installing the sensor, it is convenient for the operator to perform precision machining on the sensor. The position adjustment device includes a first support rod and a sliding plate. The first support rod is fixedly connected to the upper surface of the fixing frame, and a first fixing ring is fixedly connected to the end of the first support rod away from the fixing frame. A placement device. By providing the placement device, the sensor to be processed can be placed and clamped, thereby preventing the sensor from loosening during the processing of the sensor, achieving the prevention of sensor loosening and facilitating the adjustment of the sensor angle when installing the sensor.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to an anti-loosening fixing device for sensor production. Background Art

[0002] A sensor is a detection device that can sense the information to be measured and transform the sensed information into an electrical signal or other required form of information output according to a certain rule to meet the requirements of information transmission, processing, storage, display, recording, and control, etc. The existence and development of sensors endow objects with senses such as touch, taste, and smell, making objects come alive. Sensors are the extension of human five senses. Sensors have the characteristics of miniaturization, digitization, intelligence, multi-functionality, systematization, networking, etc. It is the primary link to realize automatic detection and automatic control. Generally, a sensor consists of four parts: a sensitive element, a conversion element, a conversion circuit, and an auxiliary power supply. The sensitive element directly senses the measured quantity and outputs a physical quantity signal having a definite relationship with the measured quantity; the conversion element converts the physical quantity signal output by the sensitive element into an electrical signal; the conversion circuit is responsible for amplifying and modulating the electrical signal output by the conversion element. Generally, the conversion element and the conversion circuit also need to be powered by an auxiliary power supply;

[0003] When a sensor is being produced, operators need to weld and adjust the parts of the sensor; since most sensors are not very large in size, when processing the internal parts of the sensor, the loosening of the sensor may cause damage to the parts. Summary of the Invention

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: An anti-loosening fixing device for sensor production, including a fixing frame, and support legs are fixedly connected to the outer surface of the fixing frame;

[0005] A position adjustment device. By setting the position adjustment device, the placement device can be rotated, thereby adjusting the orientation of the sensor. When installing the sensor, it is convenient for the operator to perform precision machining on the sensor. The position adjustment device includes a first support rod and a sliding plate. The first support rod is fixedly connected to the upper surface of the fixing frame, and a first fixing ring is fixedly connected to the end of the first support rod away from the fixing frame;

[0006] A placement device. By setting the placement device, the sensor to be processed can be placed and clamped, thereby preventing the sensor from loosening when the sensor is being processed. The placement device includes a third support rod. The third support rod is fixedly connected to the outer surface of the sliding plate, and a fixing plate is fixedly connected to the end of the third support rod away from the sliding plate;

[0007] Dust removal device. By setting up the dust removal device, the dust remaining on the outer surface of the sensor housing can be adsorbed and collected, thereby preventing dust from contaminating the sensor during sensor processing. The dust removal device includes a flow guiding ring and a collection box. The flow guiding ring is fixedly connected to the inner ring of the fixed frame. A fixed rod is fixedly connected to the inner wall of the flow guiding ring. One end of the fixed rod away from the flow guiding ring is fixedly connected to a fan. The settings of the flow guiding ring, the fixed rod and the fan can adsorb the dust on the outer surface of the sensor, so that the dust on the outer surface of the sensor enters the inner cavity of the collection box.

[0008] Preferably, a limiting plate is fixedly connected to the outer surface of the first fixing ring. The sliding plate is slidably connected to the outer surface of the first fixing ring. A first rotating ring is fixedly connected to the upper surface of the sliding plate. The settings of the limiting plate and the first fixing ring can enable the sliding plate to rotate on the first fixing ring, so that the placing device can rotate.

[0009] Preferably, a second rotating ring is fixedly connected to the lower surface of the sliding plate. The first rotating ring and the second rotating ring are frictionally adapted to the outer surface of the limiting plate. A second support rod is fixedly connected to the upper surface of the fixed frame. The top end of the second support rod is fixedly connected to a second fixing ring. The settings of the second support rod and the second fixing ring can prevent sundries such as plastic bags used for packaging the sensor from entering the device and causing the device to become blocked and stuck.

[0010] Preferably, a third fixing ring is fixedly connected to the upper surface of the fixing plate. The outer surface of the third fixing ring is rotatably connected to a first limiting sleeve. One end of the fixing plate away from the third fixing ring is fixedly connected to a fourth fixing ring. The settings of the third fixing ring and the fourth fixing ring can cooperate with the sliding plate to enable the sensor to rotate. A second limiting sleeve is fixedly connected to the outer surface of the fourth fixing ring. The settings of the first limiting sleeve and the second limiting sleeve can enable the clamping device to rotate, so as to clamp the sensor during rotation.

[0011] Preferably, a clamping device is fixedly connected to the outer surfaces of the first limiting sleeve and the second limiting sleeve. The clamping device includes a first fixing block and a second fixing block. The first fixing block is fixedly connected to the outer surface of the first limiting sleeve. The second fixing block is fixedly connected to the outer surface of the second limiting sleeve. By setting up the clamping device, the four sides of the sensor can be clamped, so that when processing the sensor, the sensor can be prevented from loosening, and further the operation accuracy during sensor processing can be ensured to be greater.

[0012] Preferably, a fourth support rod is fixedly connected to the outer surface of the first fixing block. The end of the fourth support rod is fixedly connected to a clamping plate. An elastic rod is fixedly connected to the outer surface of the clamping plate. The end of the elastic rod is fixedly connected to a first soft pad. The clamping plate, the elastic rod, and the first soft pad can clamp the outer surface of the sensor. At the same time, when being squeezed and clamped, the first soft pad and the elastic rod will deform, so as to fit the outer surface of the sensor.

[0013] Preferably, fifth support rods are fixedly connected to the upper and lower surfaces of the clamping plate. The ends of the fifth support rods are fixedly connected to anti-slip strips. The fifth support rods and the anti-slip strips can prevent the outer surface of the sensor from detaching from the clamping device, so that the sensor is tightly connected to the outer surface of the clamping device. A corrugated elastic sheet is fixedly connected between the opposite surfaces of the first fixing block and the second fixing block. The corrugated elastic sheet can pull the first fixing block, so that the first fixing block rotates downward, and the clamping plate tightly clamps the outer surface of the sensor.

[0014] Preferably, a sixth support rod is fixedly connected to the outer surface of the second fixing block. The end of the sixth support rod is fixedly connected to a placement plate. A second soft pad is fixedly connected to the upper surface of the placement plate. An elastic ring is fixedly connected to the upper surface of the placement plate. By providing the placement plate, the bottom of the sensor can be supported. The elastic ring can prevent the sensor from falling out of the device through the gap between the placement plates.

[0015] Preferably, a clamping frame is fixedly connected to the lower surface of the fixed frame. A clamping plate is fixedly connected to the outer surface of the collection box. The clamping frame and the clamping plate can achieve the effect of disassembling and installing the collection box by rotating the collection box, so as to facilitate the cleaning of the dust in the inner cavity of the collection box. The clamping plate is frictionally adapted to the inner wall of the clamping frame. An annular hole is formed in the outer surface of the collection box. A partition block is fixedly connected to the annular hole formed in the outer surface of the collection box. The partition block can discharge the gas in the collection box from the device.

[0016] Preferably, a third fixing block is fixedly connected to the bottom surface of the inner cavity of the collection box. A hemispherical frame is fixedly connected to the upper surface of the third fixing block. A collection block is fixedly connected to the bottom surface of the inner cavity of the hemispherical frame. The hemispherical frame and the collection block can adsorb the dust entering the collection box.

[0017] The present invention provides a loosening-preventing fixing device for sensor production. It has the following beneficial effects:

[0018] 1. The anti-loosening fixing device for sensor production can rotate the placement device through the position adjustment device, thereby adjusting the orientation of the sensor. When installing the sensor, it is convenient for the operator to perform precision machining on the sensor.

[0019] 2. The anti-loosening fixing device for sensor production can place and clamp the sensor to be processed through the placement device, thereby preventing the sensor from loosening during the machining process.

[0020] 3. The anti-loosening fixing device for sensor production can adsorb and collect the dust remaining on the outer surface of the sensor housing through the dust removal device, thereby preventing the dust from contaminating the sensor during the machining process. The setting of the guide ring, fixed rod and fan can adsorb the dust on the outer surface of the sensor, so that the dust on the outer surface of the sensor enters the inner cavity of the collection box.

[0021] 4. The anti-loosening fixing device for sensor production can clamp the four sides of the sensor through the clamping device, thereby preventing the sensor from loosening during the machining process, and further ensuring greater operation accuracy when machining the sensor. The setting of the clamping plate, elastic rod and first soft pad can clamp the outer surface of the sensor, and at the same time, when squeezing and clamping, the first soft pad and the elastic rod will deform, so as to fit the outer surface of the sensor.

[0022] 5. The anti-loosening fixing device for sensor production can prevent the outer surface of the sensor from detaching from the clamping device through the setting of the fifth support rod and the anti-slip strip, so that the sensor is tightly connected to the outer surface of the clamping device. The setting of the wavy elastic piece can pull the first fixing block, so that the first fixing block rotates downward, and the clamping plate tightly clamps the outer surface of the sensor. Description of the Drawings

[0023] Figure 1 It is a schematic external structure diagram of an anti-loosening fixing device for sensor production according to the present invention;

[0024] Figure 2 It is a schematic disassembled structure diagram of the present invention;

[0025] Figure 3 It is a schematic structure diagram of the position adjustment device of the present invention;

[0026] Figure 4 It is a schematic cross-sectional structure diagram of the position adjustment device of the present invention;

[0027] Figure 5 It is a schematic structure diagram of the placement device of the present invention;

[0028] Figure 6 Schematic structural diagram of the clamping device of the present invention;

[0029] Figure 7 Schematic structural diagram of the dust removal device of the present invention;

[0030] Figure 8 Schematic cross-sectional structural diagram of the dust removal device of the present invention.

[0031] In the figure: 1, fixed frame; 2, support leg; 3, position adjustment device; 4, placement device; 5, clamping frame; 6, dust removal device; 31, first support rod; 32, first fixing ring; 33, limiting plate; 34, sliding plate; 35, first rotating ring; 36, second rotating ring; 37, second support rod; 38, second fixing ring; 41, third support rod; 42, fixing plate; 43, third fixing ring; 44, fourth fixing ring; 45, first limiting sleeve; 46, second limiting sleeve; 47, clamping device; 4701, first fixing block; 4702, fourth support rod; 4703, clamping plate; 4704, elastic rod; 4705, first soft pad; 4706, fifth support rod; 4707, anti-slip strip; 4708, second fixing block; 4709, sixth support rod; 4710, placement plate; 4711, second soft pad; 4712, elastic ring; 4713, corrugated elastic sheet; 601, diversion ring; 602, fixing rod; 603, fan; 604, collection box; 605, partition block; 606, clamping plate; 607, third fixing block; 608, hemispherical frame; 609, collection block; 610, fourth fixing block; 611, third soft pad; 612, partition board. Specific embodiments

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are given for the purpose of illustration and description, and are not exhaustive or limited to the disclosed form. Many modifications and variations will be obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

[0033] The first embodiment is as Figures 1 - 4 shown. The present invention provides a technical solution: a sensor production anti-loosening fixing device, including a fixed frame 1, and support legs 2 are fixedly connected to the outer surface of the fixed frame 1;

[0034] Position adjustment device 3. By setting up the position adjustment device 3, the placement device 4 can be rotated to adjust the orientation of the sensor. When installing the sensor, it is convenient for the operator to perform precision machining on the sensor. The position adjustment device 3 includes a first support rod 31 and a sliding plate 34. The first support rod 31 is fixedly connected to the upper surface of the fixed frame 1. One end of the first support rod 31 away from the fixed frame 1 is fixedly connected to a first fixing ring 32;

[0035] Placement device 4. By setting up the placement device 4, the sensor to be processed can be placed and clamped to prevent the sensor from loosening during the machining of the sensor. The placement device 4 includes a third support rod 41. The third support rod 41 is fixedly connected to the outer surface of the sliding plate 34. One end of the third support rod 41 away from the sliding plate 34 is fixedly connected to a fixing plate 42;

[0036] Dust removal device 6. By setting up the dust removal device 6, the dust remaining on the outer surface of the sensor housing can be adsorbed and collected to prevent the dust from contaminating the sensor during the machining of the sensor. The dust removal device 6 includes a diversion ring 601 and a collection box 604. The diversion ring 601 is fixedly connected to the inner ring of the fixed frame 1. A fixed rod 602 is fixedly connected to the inner wall of the diversion ring 601. One end of the fixed rod 602 away from the diversion ring 601 is fixedly connected to a fan 603. The settings of the diversion ring 601, the fixed rod 602 and the fan 603 can adsorb the dust on the outer surface of the sensor, so that the dust on the outer surface of the sensor enters the inner cavity of the collection box 604.

[0037] The outer surface of the first fixing ring 32 is fixedly connected with a limiting plate 33. The sliding plate 34 is slidably connected to the outer surface of the first fixing ring 32. The upper surface of the sliding plate 34 is fixedly connected with a first rotating ring 35. The arrangements of the limiting plate 33 and the first fixing ring 32 enable the sliding plate 34 to rotate on the first fixing ring 32, so that the placing device 4 can rotate. The lower surface of the sliding plate 34 is fixedly connected with a second rotating ring 36. The first rotating ring 35 and the second rotating ring 36 are frictionally adapted to the outer surface of the limiting plate 33. The upper surface of the fixed frame 1 is fixedly connected with a second support rod 37. The top end of the second support rod 37 is fixedly connected with a second fixing ring 38. The arrangements of the second support rod 37 and the second fixing ring 38 can prevent sundries such as plastic bags for sensor packaging from entering the device and causing blockage and jamming of the device. The upper surface of the fixing plate 42 is fixedly connected with a third fixing ring 43. The outer surface of the third fixing ring 43 is rotatably connected with a first limiting sleeve 45. One end of the fixing plate 42 away from the third fixing ring 43 is fixedly connected with a fourth fixing ring 44. The arrangements of the third fixing ring 43 and the fourth fixing ring 44 can cooperate with the sliding plate 34 to enable the sensor to rotate. The outer surface of the fourth fixing ring 44 is fixedly connected with a second limiting sleeve 46. The arrangements of the first limiting sleeve 45 and the second limiting sleeve 46 can enable the clamping device 47 to rotate, so as to clamp the sensor during rotation. When in use, after the operator clamps the sensor and needs to change the orientation of sensor processing, the operator rotates the sensor. The sensor and the placing device 4 rotate on the outer surface of the first fixing ring 32 under the action of the sliding plate 34, so as to change the angle of the sensor.

[0038] Second embodiment, as Figures 5 - 6As shown, a clamping device 47 is fixedly connected to the outer surfaces of the first limiting sleeve 45 and the second limiting sleeve 46. The clamping device 47 includes a first fixing block 4701 and a second fixing block 4708. The first fixing block 4701 is fixedly connected to the outer surface of the first limiting sleeve 45, and the second fixing block 4708 is fixedly connected to the outer surface of the second limiting sleeve 46. By providing the clamping device 47, the four sides of the sensor can be clamped, so that when the sensor is processed, the sensor can be prevented from loosening, and further the operation accuracy during the sensor processing can be ensured to be greater. A fourth support rod 4702 is fixedly connected to the outer surface of the first fixing block 4701. The end of the fourth support rod 4702 is fixedly connected to a clamping plate 4703. An elastic rod 4704 is fixedly connected to the outer surface of the clamping plate 4703. The end of the elastic rod 4704 is fixedly connected to a first soft pad 4705. The clamping plate 4703, the elastic rod 4704 and the first soft pad 4705 can clamp the outer surface of the sensor and, when being squeezed and clamped, the first soft pad 4705 and the elastic rod 4704 will deform, so as to fit the outer surface of the sensor. Fifth support rods 4706 are fixedly connected to the upper and lower surfaces of the clamping plate 4703. The ends of the fifth support rods 4706 are fixedly connected to anti-slip strips 4707. The fifth support rods 4706 and the anti-slip strips 4707 can prevent the outer surface of the sensor from detaching from the clamping device, so that the sensor is tightly connected to the outer surface of the clamping device 47. A corrugated elastic sheet 4713 is fixedly connected between the opposite surfaces of the first fixing block 4701 and the second fixing block 4708. The corrugated elastic sheet 4713 can pull the first fixing block 4701, so that the first fixing block 4701 rotates downward, and the clamping plate 4703 tightly clamps the outer surface of the sensor. A sixth support rod 4709 is fixedly connected to the outer surface of the second fixing block 4708. The end of the sixth support rod 4709 is fixedly connected to a placement plate 4710. A second soft pad 4711 is fixedly connected to the upper surface of the placement plate 4710. An elastic ring 4712 is fixedly connected to the upper surface of the placement plate 4710. By providing the placement plate 4710, the bottom of the sensor can be supported. The elastic ring 4712 can prevent the sensor from falling off the device through the gap between the placement plate 4710. During use, an operator places the sensor on the upper surface of the placement plate 4710, and the second soft pad 4711 protects the bottom of the sensor. Under the influence of the self-gravity of the sensor, the sensor drives the placement plate 4710 to move downward. During the movement, the corrugated elastic sheet 4713 pulls the first fixing block 4701, so that the clamping plate 4703 clamps the outer surface of the sensor.

[0039] The third embodiment, as Figures 7 - 8As shown in the figure, a clamping frame 5 is fixedly connected to the lower surface of the fixed frame 1, and a clamping plate 606 is fixedly connected to the outer surface of the collection box 604. The clamping frame 5 and the clamping plate 606 are arranged such that by rotating the collection box 604, the collection box 604 can be disassembled and installed, thus facilitating the cleaning of the dust in the inner cavity of the collection box 604. The clamping plate 606 is frictionally adapted to the inner wall of the clamping frame 5. An annular hole is formed in the outer surface of the collection box 604, and a partition block 605 is fixedly connected to the position where the annular hole is formed in the outer surface of the collection box 604. The partition block 605 is arranged to enable the gas in the collection box 604 to be discharged. A third fixing block 607 is fixedly connected to the bottom surface of the inner cavity of the collection box 604, and a hemispherical frame 608 is fixedly connected to the upper surface of the third fixing block 607. A collection block 609 is fixedly connected to the bottom surface of the inner cavity of the hemispherical frame 608. The hemispherical frame 608 and the collection block 609 are arranged to adsorb the dust entering the collection box 604. A fourth fixing block 610 is fixedly connected to the inner wall of the hemispherical frame 608, and a third soft pad 611 is fixedly connected to the outer surface of the fourth fixing block 610. A partition plate 612 is fixedly connected to the outer surface of the third soft pad 611. The partition plate 612 is arranged to prevent the dust from floating out of the inner cavity of the hemispherical frame 608 again. During use, the operator connects the fan 603 to the power supply and turns on the switch of the fan 603. The fan starts to work, so that the dust on the outer surface of the sensor is sucked into the inner cavity of the collection box 604. After the dust enters the collection block 609, it will adhere to the outer surface of the collection block 609. Under the action of the third soft pad 611, the partition plate 612 can only turn downward and cannot turn upward. Therefore, the dust will not float out of the hemispherical frame 608.

[0040] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without making creative efforts shall fall within the scope of protection of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art without special description and limitation.

Claims

1. An anti-loosening fixing device for sensor production, including a fixing frame (1), the outer surface of the fixing frame (1) is fixedly connected with support legs (2), and it is characterized in that: This anti-loosening fixing device for sensor production further includes; A position adjustment device (3), the position adjustment device (3) includes a first support rod (31) and a sliding plate (34), the first support rod (31) is fixedly connected to the upper surface of the fixing frame (1), and one end of the first support rod (31) far from the fixing frame (1) is fixedly connected with a first fixing ring (32); A placement device (4), the placement device (4) includes a third support rod (41), the third support rod (41) is fixedly connected to the outer surface of the sliding plate (34), and one end of the third support rod (41) far from the sliding plate (34) is fixedly connected with a fixing plate (42); A dust removal device (6), the dust removal device (6) includes a diversion ring (601) and a collection box (604), the diversion ring (601) is fixedly connected to the inner ring of the fixing frame (1), a fixing rod (602) is fixedly connected to the inner wall of the diversion ring (601), and one end of the fixing rod (602) far from the diversion ring (601) is fixedly connected with a fan (603); The upper surface of the fixing plate (42) is fixedly connected with a third fixing ring (43), the outer surface of the third fixing ring (43) is rotatably connected with a first limiting sleeve (45), one end of the fixing plate (42) far from the third fixing ring (43) is fixedly connected with a fourth fixing ring (44), and the outer surface of the fourth fixing ring (44) is fixedly connected with a second limiting sleeve (46); The lower surface of the fixing frame (1) is fixedly connected with a clamping frame (5), the outer surface of the collection box (604) is fixedly connected with a clamping plate (606), the clamping plate (606) is frictionally adapted to the inner wall of the clamping frame (5), an annular hole is opened on the outer surface of the collection box (604), and a partition block (605) is fixedly connected to the annular hole opened on the outer surface of the collection box (604); The bottom surface of the inner cavity of the collection box (604) is fixedly connected with a third fixing block (607), the upper surface of the third fixing block (607) is fixedly connected with a hemispherical frame (608), and the bottom surface of the inner cavity of the hemispherical frame (608) is fixedly connected with a collection block (609); The inner wall of the hemispherical frame (608) is fixedly connected with a fourth fixing block (610), the outer surface of the fourth fixing block (610) is fixedly connected with a third soft pad (611), and the outer surface of the third soft pad (611) is fixedly connected with a partition plate (612).

2. The anti-loosening fixing device for sensor production according to claim 1, characterized in that: The outer surface of the first fixing ring (32) is fixedly connected with a limiting plate (33), the sliding plate (34) is slidably connected to the outer surface of the first fixing ring (32), and the upper surface of the sliding plate (34) is fixedly connected with a first rotating ring (35).

3. A loosening prevention fixing device for sensor production according to claim 2, characterized in that: The lower surface of the sliding plate (34) is fixedly connected with a second rotating ring (36). The first rotating ring (35) and the second rotating ring (36) are frictionally adapted to the outer surface of the limiting plate (33). The upper surface of the fixed frame (1) is fixedly connected with a second support rod (37), and the top end of the second support rod (37) is fixedly connected with a second fixed ring (38).

4. A loosening prevention fixing device for sensor production according to claim 1, characterized in that: The outer surfaces of the first limiting sleeve (45) and the second limiting sleeve (46) are fixedly connected with a clamping device (47). The clamping device (47) includes a first fixed block (4701) and a second fixed block (4708). The first fixed block (4701) is fixedly connected to the outer surface of the first limiting sleeve (45), and the second fixed block (4708) is fixedly connected to the outer surface of the second limiting sleeve (46).

5. A loosening prevention fixing device for sensor production according to claim 4, characterized in that: The outer surface of the first fixed block (4701) is fixedly connected with a fourth support rod (4702). The end of the fourth support rod (4702) is fixedly connected with a clamping plate (4703). The outer surface of the clamping plate (4703) is fixedly connected with an elastic rod (4704), and the end of the elastic rod (4704) is fixedly connected with a first soft pad (4705).

6. The anti-loosening fixing device for sensor production according to claim 5, characterized in that: The upper and lower surfaces of the clamping plate (4703) are fixedly connected with fifth support rods (4706). The ends of the fifth support rods (4706) are fixedly connected with anti-slip strips (4707). A corrugated elastic sheet (4713) is fixedly connected between the opposite surfaces of the first fixed block (4701) and the second fixed block (4708).

7. A loosening prevention fixing device for sensor production according to claim 6, characterized in that: The outer surface of the second fixed block (4708) is fixedly connected with a sixth support rod (4709). The end of the sixth support rod (4709) is fixedly connected with a placement plate (4710). The upper surface of the placement plate (4710) is fixedly connected with a second soft pad (4711), and the upper surface of the placement plate (4710) is fixedly connected with an elastic ring (4712).

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