Portable device for rapidly detecting hidden danger of electrical circuit for fire supervision

Abstract

The invention provides a portable device for rapidly detecting hidden dangers of an electrical circuit for fire-fighting supervision, and relates to the technical field of fire-fighting electrical circuit inspection. The top of the main controller is fixedly provided with a fixed rod, the fixed rod is rotatably provided with a group of rotating frames, the top of the fixed rod is also slidably provided with a positioning rod, the top of each rotating frame is provided with three groups of positioning holes in a circular array manner, and the mounting structures of the infrared sensor and the current clamp are the same as the mounting structures of the voltage probes; the voltage probe is quickly disassembled and assembled, and the mounting structures of the infrared sensor and the current clamp are the same, so that the maintenance efficiency is improved; through the second elastic piece, the detection probe assembly is adaptively attached to the electrical circuit, and the detection effect is improved; rapid switching of the rapid detection probe can be realized and the stability is enhanced, so that the device has better multifunctional detection performance; the problems that the dismounting and maintenance efficiency of a detection probe is low, and poor contact or excessive extrusion often occurs when different wire diameters or bent lines are detected are solved.

Description

Technical Field

[0001] This invention relates to the field of fire protection electrical circuit inspection technology, and in particular to a portable device for rapid detection of potential electrical circuit hazards for fire supervision. Background Art

[0002] As the core carrier of electrical energy transmission, the operational safety of electrical lines is directly related to the stable operation of social production and life. However, due to factors such as line aging, insulation damage, overload operation, and environmental factors, electrical lines are prone to hidden faults such as abnormal accumulation of residual current and abnormal temperature rise at conductor connection points during long-term service. If these hidden dangers are not investigated and dealt with in a timely manner, they can easily cause secondary disasters such as short circuits, electric arcs, or even explosions, resulting in significant casualties and property losses. Therefore, a portable device for rapid detection of hidden dangers in electrical lines for fire supervision is needed.

[0003] Currently available portable devices for rapid detection of electrical wiring hazards in fire supervision suffer from low efficiency in probe disassembly and maintenance: most detection components are fastened with bolts or clips, which can easily lead to thread wear and clip deformation during frequent disassembly and assembly, resulting in increased maintenance time and decreased component reliability. When detecting wires of different diameters or curved lines, poor contact or excessive compression often occurs, reducing the reliability of the detection results and making it difficult for the device to quickly switch between multiple probes. Summary of the Invention

[0004] This invention relates to a portable device for rapid detection of electrical circuit hazards for fire supervision. It enables quick assembly and disassembly of voltage probes, and the infrared sensor and current clamp have the same mounting structure, improving maintenance efficiency. It facilitates the guidance of detection components on electrical circuits and allows for easy adjustment and positioning of detection components such as voltage probes, enabling rapid switching and enhanced stability, thus giving the device superior multi-functional detection performance.

[0005] In a first aspect, the present invention provides a portable device for rapid detection of potential electrical circuit hazards for fire supervision, specifically comprising: a main controller; A set of fixed rods is fixedly installed on the top of the main controller. A set of rotating frames is rotatably installed on the fixed rods. A set of positioning rods is also slidably installed on the top of the fixed rods. The top of the rotating frames has three sets of positioning holes in a circular array. The positioning rods on the top of the fixed rods are inserted into the positioning holes on the top of the rotating frames. Six sets of arc guide rails are installed on the outer end of the rotating frames. Three sets of mounting frames are also slidably installed in a circular array on the outer end of the rotating frames. Voltage probes, infrared sensors, and current clamps are respectively snapped onto the outer ends of the three sets of mounting frames. Limiting holes are opened on the outer end of the voltage probes. Limiting rods are slidably installed on the mounting frames. The limiting rods on the mounting frames are inserted into the limiting holes on the outer end of the voltage probes. A set of arc guide rails is placed at both ends of the voltage probes. The mounting structure of the infrared sensor and the current clamp is the same as that of the voltage probes.

[0006] Furthermore, a set of third elastic elements is sleeved on the guide rod at the outer end of the limiting rod, and the outer end of the third elastic element is in contact with the inner end face of the outer plate on the mounting frame.

[0007] Furthermore, a set of top plates are fixedly installed on the top of the fixing rod, and a set of sliding holes are opened on the top plate. A set of sliding rods are fixedly installed on the top of the positioning rod, and the sliding rods at the top of the positioning rod are slidably installed on the sliding holes of the top plate of the fixing rod.

[0008] Furthermore, a set of guide blocks are fixedly installed at both ends of the voltage probe, and a set of positioning grooves are opened at both ends of the mounting frame, and the guide blocks at both ends of the voltage probe are respectively snapped into the positioning grooves at both ends of the mounting frame.

[0009] Furthermore, a set of outer fixing plates are fixedly installed at both ends of the rotating frame, and sliding holes are provided on the outer fixing plates. A set of guide rods are fixedly installed at both ends of the mounting frame, and the guide rods at both ends of the mounting frame are slidably installed on the sliding holes of the outer fixing plates at both ends of the rotating frame.

[0010] Furthermore, a set of first elastic elements is also sleeved on the slide rod at the top of the positioning rod, and the top of the first elastic elements is in contact with the bottom surface of the top plate on the fixed rod.

[0011] Furthermore, a set of external plates are fixedly installed at both ends of the mounting frame, and a set of sliding holes are opened on the external plates. A set of guide rods is fixedly installed at the outer end of the limiting rod, and the guide rods at the outer end of the limiting rod are slidably installed on the sliding holes of the external plates at both ends of the mounting frame.

[0012] Furthermore, a set of second elastic elements is respectively sleeved on the guide rods at both ends of the mounting frame, and the inner ends of the second elastic elements are in contact with the outer end faces of the outer fixed plates on the rotating frame.

[0013] Furthermore, a set of rotating shafts is fixedly installed on the fixed rod, and a set of rotating holes are opened on the rotating frame, with the rotating holes on the rotating frame rotatably mounted on the rotating shafts of the fixed rod.

[0014] Furthermore, a connector is fixedly installed at the inner end of the arc guide rail, and a set of connection holes are respectively opened at both ends of the rotating frame. The connector at the inner end of the arc guide rail is fixedly installed on the connection hole of the rotating frame by fixing bolts.

[0015] This invention provides a portable device for rapid detection of electrical wiring hazards for fire supervision, which has the following beneficial effects: In this invention, the voltage probe is quickly assembled and disassembled by the outer end guide rod of the limiting rod engaging with the sliding hole of the mounting bracket and the action of the third elastic element. The infrared sensor and current clamp have the same mounting structure, which improves maintenance efficiency. The arc guide rail is fixed to the rotating frame by fixing bolts, which facilitates the guidance of the detection components on the electrical circuit. The guide rods at both ends of the mounting bracket engage with the sliding hole of the rotating frame and the action of the second elastic element, which allows the detection probe assembly to adaptively fit the electrical circuit, improving the detection effect. The rotating frame is rotatably connected to the rotating shaft of the fixed rod through a rotating hole. The positioning rod engages with the sliding hole of the top plate of the fixed rod through a sliding rod and the action of the first elastic element, which facilitates the separate adjustment of the positioning voltage probe and other detection components, enabling rapid switching and enhancing stability, giving the device better multi-functional detection performance.

[0016] Furthermore, the guide rod at the outer end of the limiting rod is slidably installed on the sliding holes of the external plates at both ends of the mounting frame. Pulling the limiting rod outward will engage the guide blocks at both ends of the voltage probe with the positioning slots at both ends of the mounting frame. After the voltage probe moves to the fixed position, the limiting rod is released. Under the action of the third elastic element on the guide rod, the limiting rod on the mounting frame is inserted into the limiting hole at the outer end of the voltage probe. The mounting structure of the infrared sensor and the current clamp is the same as that of the voltage probe. This makes it easy to quickly disassemble and maintain the voltage probe, infrared sensor, and current clamp of this device, improving the maintenance efficiency of the device. The connector at the inner end of the arc guide rail is fixedly installed on the connecting hole of the rotating frame with fixing bolts. The arc guide rail facilitates the guidance of the detection components of the device on the electrical circuit.

[0017] In addition, the guide rods at both ends of the mounting frame are slidably mounted on the sliding holes of the outer fixed plates at both ends of the rotating frame. With the cooperation of the second elastic element on the guide rod, the device can adaptively fit the detection probe assembly onto the electrical circuit, thereby improving the detection effect of the device.

[0018] Furthermore, the rotating shaft of the fixed rod is rotatably mounted on the rotating frame via the rotating hole. The slide bar at the top of the positioning rod is slidably mounted on the sliding hole in the top plate of the fixed rod. Pulling the positioning rod upward and rotating the rotating frame moves the required detection component to the detection position. After releasing the positioning rod, under the action of the first elastic element on the slide bar, the positioning rod at the top of the fixed rod is inserted into the positioning hole at the top of the rotating frame. This allows the device to easily adjust and position the voltage probe, infrared sensor, and current clamp separately, giving the device better multi-functional detection performance, enabling rapid switching of detection probes, and improving the stability of each detection probe in the device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0020] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0021] In the attached diagram: Figure 1 This is a front-axis schematic diagram of the portable device for rapid detection of electrical wiring hazards for fire supervision according to the present invention.

[0022] Figure 2 This is a rear-axis schematic diagram of the portable device for rapid detection of electrical wiring hazards for fire supervision according to the present invention.

[0023] Figure 3 This is a schematic diagram of the disassembly and assembly of the rotating frame of the portable device for rapid detection of electrical circuit hazards for fire supervision according to the present invention.

[0024] Figure 4 This is a top view of the mounting bracket for the portable device for rapid detection of electrical wiring hazards for fire monitoring according to the present invention.

[0025] Figure 5 This is a schematic diagram of the assembly and disassembly of the arc guide rail of the portable device for rapid detection of electrical circuit hazards for fire supervision according to the present invention.

[0026] Figure 6 This is a schematic diagram of the mounting bracket for the portable device for rapid detection of electrical wiring hazards for fire supervision according to the present invention.

[0027] Figure 7 This is a schematic diagram of the disassembly and assembly of the voltage probe of the portable device for rapid detection of electrical circuit hazards for fire supervision according to the present invention.

[0028] Figure 8 This is a schematic diagram of the installation of the voltage probe of the portable device for rapid detection of electrical circuit hazards for fire supervision according to the present invention.

[0029] Figure 9 This is a schematic diagram of the installation of the rotating frame of the portable device for rapid detection of electrical circuit hazards for fire supervision according to the present invention.

[0030] List of reference numerals 1. Main controller; 101. Fixed rod; 1011. Rotating shaft; 102. Top plate; 103. Positioning rod; 1031. Sliding rod; 1032. First elastic element; 2. Rotating frame; 201. Rotating hole; 202. Positioning hole; 203. Connecting hole; 204. Outer fixing plate; 3. Arc guide rail; 301. Connector; 302. Fixing bolt; 4. Mounting bracket; 401. Guide rod; 402. Second elastic element; 403. Positioning groove; 404. Limiting rod; 4041. Guide rod; 4042. Third elastic element; 405. External plate; 5. Voltage probe; 501. Guide block; 502. Limiting hole; 6. Infrared sensor; 7. Current clamp. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please refer to Figures 1 to 9 As shown: Example 1: This invention provides a portable device for rapid detection of electrical circuit hazards for fire supervision, including a main controller 1; A set of fixed rods 101 are fixedly installed on the top of the main controller 1. A set of rotating frames 2 are rotatably installed on the fixed rods 101. A set of positioning rods 103 are also slidably installed on the top of the fixed rods 101. The top of the rotating frames 2 has three sets of positioning holes 202 in a circular array. The positioning rods 103 on the top of the fixed rods 101 are inserted into the positioning holes 202 on the top of the rotating frames 2. Six sets of arc guide rails 3 are installed on the outer end of the rotating frames 2. Three sets of mounting frames 4 are also slidably installed in a circular array on the outer end of the rotating frames 2. Voltage probes 5, infrared sensors 6 and current clamps 7 are respectively snapped onto the outer ends of the three sets of mounting frames 4. Limiting holes 502 are opened on the outer end of the voltage probes 5. Limiting rods 404 are slidably installed on the mounting frames 4. The limiting rods 404 on the mounting frames 4 are inserted into the limiting holes 502 on the outer end of the voltage probes 5. A set of arc guide rails 3 are placed at both ends of the voltage probes 5. The mounting structure of the infrared sensors 6 and the current clamps 7 is the same as that of the voltage probes 5.

[0033] Among them, such as Figure 7 and Figure 8 As shown, a connector 301 is fixedly installed on the inner end of the arc guide rail 3. A set of connecting holes 203 are respectively opened at both ends of the rotating frame 2, and the connector 301 at the inner end of the arc guide rail 3 is fixedly installed on the connecting holes 203 of the rotating frame 2 by fixing bolts 302. A set of guide blocks 501 are fixedly installed on both ends of the voltage probe 5, and a set of positioning grooves 403 are respectively opened at both ends of the mounting frame 4, and the guide blocks 501 at both ends of the voltage probe 5 are respectively engaged with the positioning grooves at both ends of the mounting frame 4. On the groove 403, a set of external plates 405 are fixedly installed at both ends of the mounting bracket 4. A set of sliding holes are opened on the external plates 405. A set of guide rods 4041 are fixedly installed on the outer end of the limiting rod 404, and the guide rods 4041 at the outer end of the limiting rod 404 are slidably installed on the sliding holes of the external plates 405 at both ends of the mounting bracket 4. A set of third elastic members 4042 are sleeved on the guide rods 4041 at the outer end of the limiting rod 404, and the outer end of the third elastic member 4042 is connected to the external plate 405 on the mounting bracket 4. The inner end faces of 05 are in contact; specifically, the guide rod 4041 at the outer end of the limiting rod 404 is slidably installed on the sliding holes of the outer plates 405 at both ends of the mounting frame 4. Pulling the limiting rod 404 outward will cause the guide blocks 501 at both ends of the voltage probe 5 to be respectively snapped into the positioning grooves 403 at both ends of the mounting frame 4. After the voltage probe 5 moves to the fixed position, the limiting rod 404 is released. Under the action of the third elastic element 4042 on the guide rod 4041, the limiting rod 404 on the mounting frame 4 is inserted into the limiting hole 502 at the outer end of the voltage probe 5. The mounting structure of the infrared sensor 6 and the current clamp 7 is the same as that of the voltage probe 5, so that the voltage probe 5, infrared sensor 6 and current clamp 7 of this device can be quickly disassembled and maintained, improving the maintenance efficiency of the device. The connector 301 at the inner end of the arc guide rail 3 is fixedly installed on the connecting hole 203 of the rotating frame 2 by the fixing bolt 302. The arc guide rail 3 facilitates the guidance of the detection components of the device on the electrical circuit.

[0034] In this embodiment of the invention, as follows: Figure 6 As shown, a set of outer fixing plates 204 are fixedly installed at both ends of the rotating frame 2, and sliding holes are provided on the outer fixing plates 204. A set of guide rods 401 are fixedly installed at both ends of the mounting frame 4, and the guide rods 401 at both ends of the mounting frame 4 are slidably installed on the sliding holes of the outer fixing plates 204 at both ends of the rotating frame 2. A set of second elastic elements 402 are sleeved on the guide rods 401 at both ends of the mounting frame 4, and the inner ends of the second elastic elements 402 are in contact with the outer end faces of the outer fixing plates 204 on the rotating frame 2. Specifically, the guide rods 401 at both ends of the mounting frame 4 are slidably installed on the sliding holes of the outer fixing plates 204 at both ends of the rotating frame 2, and cooperate with the second elastic elements 402 on the guide rods 401 so that the device can adaptively fit the detection probe assembly onto the electrical circuit, thereby improving the detection effect of the device.

[0035] Example 2: Based on Example 1, wherein, as Figure 3 and Figure 9 As shown, a set of rotating shafts 1011 are fixedly installed on the fixed rod 101. A set of rotating holes 201 are provided on the rotating frame 2, and the rotating holes 201 on the rotating frame 2 are rotatably installed on the rotating shafts 1011 of the fixed rod 101. A set of top plates 102 are fixedly installed on the top of the fixed rod 101, and a set of sliding holes are provided on the top plates 102. A set of sliding rods 1031 are fixedly installed on the top of the positioning rod 103, and the sliding rods 1031 at the top of the positioning rod 103 are slidably installed on the sliding holes of the top plate 102 at the top of the fixed rod 101. A set of first elastic members 1032 are also sleeved on the sliding rods 1031 at the top of the positioning rod 103, and the top of the first elastic members 1032 is in contact with the bottom surface of the top plate 102 on the fixed rod 101. Specifically, the rotating frame... The rotating hole 201 on the fixed rod 101 is rotatably mounted on the rotating shaft 1011 of the fixed rod 101. The sliding rod 1031 on the top of the positioning rod 103 is slidably mounted on the sliding hole of the top plate 102 of the fixed rod 101. Pulling the positioning rod 103 upward and rotating the rotating frame 2 moves the required detection component to the detection position. After releasing the positioning rod 103, under the action of the first elastic element 1032 on the sliding rod 1031, the positioning rod 103 on the top of the fixed rod 101 is inserted into the positioning hole 202 on the top of the rotating frame 2. This makes it easy for the device to adjust and position the voltage probe 5, infrared sensor 6 and current clamp 7 respectively, so that the device has better multi-functional detection performance, realizes rapid switching of detection probes, and improves the stability of each detection probe of the device.

[0036] The specific usage and function of this embodiment: In this invention, pulling the limiting rod 404 outwards causes the guide blocks 501 at both ends of the voltage probe 5 to be respectively engaged and installed on the positioning grooves 403 at both ends of the mounting frame 4. After the voltage probe 5 moves to a fixed position, the limiting rod 404 is released. Under the action of the third elastic element 4042 on the guide rod 4041, the limiting rod 404 on the mounting frame 4 is inserted and installed on the limiting hole 502 at the outer end of the voltage probe 5. The mounting structure of the infrared sensor 6 and the current clamp 7 is the same as that of the voltage probe 5, thereby making it easy to quickly disassemble and maintain the voltage probe 5, infrared sensor 6, and current clamp 7 of this device, improving the maintenance efficiency of the device. The connector 301 at the inner end of the arc guide rail 3 is fixedly installed on the connecting hole 203 of the rotating frame 2 by the fixing bolt 302. The arc guide rail 3 facilitates the electrical connection of the detection components of the device. The device guides the circuit; the guide rods 401 at both ends of the mounting frame 4 are slidably mounted on the sliding holes of the outer fixed plates 204 at both ends of the rotating frame 2, and cooperate with the second elastic element 402 on the guide rod 401 so that the device can adaptively fit the detection probe assembly onto the electrical circuit, thereby improving the detection effect of the device; pull the positioning rod 103 upward and rotate the rotating frame 2 so that the required detection component moves to the detection position. After releasing the positioning rod 103, under the action of the first elastic element 1032 on the sliding rod 1031, the positioning rod 103 at the top of the fixing rod 101 is inserted into the positioning hole 202 at the top of the rotating frame 2, so that the device can easily adjust and position the voltage probe 5, infrared sensor 6 and current clamp 7 respectively, so that the device has better multi-functional detection performance, realizes rapid switching of detection probes, and improves the stability of each detection probe of the device.

[0037] The following points should be noted in the text: 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0038] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0039] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A portable device for rapid detection of potential electrical wiring hazards for fire safety supervision, characterized in that, Including the main controller (1); A set of fixed rods (101) is fixedly installed on the top of the main controller (1). A set of rotating frames (2) is rotatably installed on the fixed rods (101). A set of positioning rods (103) is also slidably installed on the top of the fixed rods (101). The top of the rotating frame (2) has three sets of positioning holes (202) arranged in a circular array. The positioning rods (103) on the top of the fixed rods (101) are inserted into the positioning holes (202) on the top of the rotating frame (2). Six sets of arc guide rails (3) are installed on the outer end of the rotating frame (2). The outer end of the rotating frame (2) is also slidably installed in a circular array. The device is equipped with three sets of mounting brackets (4). The outer ends of the three sets of mounting brackets (4) are respectively clamped and installed with voltage probe (5), infrared sensor (6) and current clamp (7). The outer end of voltage probe (5) has a limit hole (502). Limit rod (404) is slidably installed on the mounting bracket (4). The limit rod (404) on the mounting bracket (4) is inserted into the limit hole (502) on the outer end of voltage probe (5). Both ends of voltage probe (5) are provided with a set of arc guide rails (3). The mounting structure of infrared sensor (6) and current clamp (7) is the same as that of voltage probe (5).

2. The portable device for rapid detection of electrical wiring hazards for fire supervision according to claim 1, characterized in that: The inner end of the arc guide rail (3) is fixedly installed with a connector (301), and a set of connecting holes (203) are opened at both ends of the rotating frame (2). The connector (301) at the inner end of the arc guide rail (3) is fixedly installed on the connecting hole (203) of the rotating frame (2) by fixing bolts (302).

3. The portable device for rapid detection of electrical wiring hazards for fire supervision according to claim 1, characterized in that: A set of guide blocks (501) are fixedly installed at both ends of the voltage probe (5), and a set of positioning grooves (403) are opened at both ends of the mounting frame (4). The guide blocks (501) at both ends of the voltage probe (5) are respectively snapped onto the positioning grooves (403) at both ends of the mounting frame (4).

4. A portable device for rapid detection of electrical wiring hazards for fire supervision as described in claim 1, characterized in that: A set of external plates (405) are fixedly installed at both ends of the mounting bracket (4). A set of sliding holes are provided on the external plates (405). A set of guide rods (4041) is fixedly installed at the outer end of the limiting rod (404), and the guide rods (4041) at the outer end of the limiting rod (404) are slidably installed on the sliding holes of the external plates (405) at both ends of the mounting bracket (4).

5. A portable device for rapid detection of electrical wiring hazards for fire supervision as described in claim 1, characterized in that: A set of third elastic elements (4042) is sleeved on the guide rod (4041) at the outer end of the limiting rod (404), and the outer end of the third elastic element (4042) is in contact with the inner end face of the outer plate (405) on the mounting frame (4).

6. A portable device for rapid detection of electrical wiring hazards for fire supervision as described in claim 1, characterized in that: The rotating frame (2) has a set of outer fixed plates (204) fixedly installed at both ends, and the outer fixed plates (204) have sliding holes. The mounting frame (4) has a set of guide rods (401) fixedly installed at both ends, and the guide rods (401) at both ends of the mounting frame (4) are slidably installed on the sliding holes of the outer fixed plates (204) at both ends of the rotating frame (2).

7. A portable device for rapid detection of electrical wiring hazards for fire supervision as described in claim 1, characterized in that: A set of second elastic elements (402) are respectively sleeved on the guide rods (401) at both ends of the mounting frame (4), and the inner ends of the second elastic elements (402) are in contact with the outer end face of the outer fixed plate (204) on the rotating frame (2).

8. A portable device for rapid detection of electrical wiring hazards for fire supervision as described in claim 1, characterized in that: A set of rotating shafts (1011) is fixedly installed on the fixed rod (101), and a set of rotating holes (201) are opened on the rotating frame (2), and the rotating holes (201) on the rotating frame (2) are rotatably installed on the rotating shafts (1011) of the fixed rod (101).

9. A portable device for rapid detection of electrical wiring hazards for fire supervision as described in claim 1, characterized in that: A set of top plates (102) are fixedly installed on the top of the fixed rod (101), and a set of sliding holes are provided on the top plate (102). A set of sliding rods (1031) are fixedly installed on the top of the positioning rod (103), and the sliding rods (1031) on the top of the positioning rod (103) are slidably installed on the sliding holes of the top plate (102) of the fixed rod (101).

10. A portable device for rapid detection of electrical wiring hazards for fire supervision according to claim 1, characterized in that: A set of first elastic elements (1032) is also sleeved on the slide rod (1031) at the top of the positioning rod (103), and the top of the first elastic element (1032) is in contact with the bottom surface of the top plate (102) on the fixing rod (101).

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