Sampling box for environment detection

Abstract

The invention relates to the technical field of sample storage boxes, and discloses a sampling box for environment detection, which comprises a vertical storage mechanism and a plurality of threaded clamping mechanisms, a polygonal shelf which is placed in the storage box and can support samples, and a threaded sleeve which is rotatably mounted at the center of the polygonal shelf and mounted at the rod body of the longitudinal external threaded rod through a threaded structure are arranged in the storage box; the annular abutting plate can abut against the outer circumferential wall face of the threaded sleeve, and the spiral spring can control friction force between the annular abutting plate and the outer circumferential wall face of the threaded sleeve. According to the sampling box for environment detection, a collected sample can be clamped between two sponge pads, and an elastic clamping effect is generated on the sample, so that the stability of the sample in the transportation process is ensured on the basis of buffering impact strength, and in addition, the device can control the clamping force of the sponge pads on the sample according to the specific stress condition of the sample.

Description

Technical Field

[0001] This invention relates to the field of sample storage box technology, specifically a sampling box for environmental testing. Background Technology

[0002] Chinese patent publication number CN221795489U discloses "A sampling box for environmental testing," whose main structure includes a lid, handle, sampling box body, shock-absorbing plate, first locking bolt, storage layer, placement part, sampling bottle, and bottom shock-absorbing device. By setting a bottom shock-absorbing device at the bottom of the sampling box body, and utilizing the cooperation between the spring shock absorber and the mounting plate, the bottom shock-absorbing device can convert the shaking caused by wheel swaying when passing over uneven ground or mountain roads into elastic potential energy, thereby reducing the shaking of the sampling box body caused by wheel swaying and making the process of pushing the sampling box body more effortless. Simultaneously, by setting shock-absorbing plates around the sampling box body, the shock-absorbing plates are used to reduce the vibration when the sampling box body is impacted, thereby preventing damage to the samples inside the sampling box body from impact.

[0003] It is clear that the sampling box used for environmental testing uses a helical spring to generate an impact buffering effect, thereby reducing the impact intensity of the instantaneous impact force on the inside of the sampling box. However, the impact intensity is only buffered, and the negative impact caused by it can still cause the collected samples inside the sampling box to collide. At the same time, the impact angle requirement is also relatively high (the impact angle must be consistent with the compression stroke of the helical spring over a large range), which leads to its limited use. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a sampling box for environmental testing that can hold the collected sample between two sponge pads and provide an elastic clamping effect, thereby ensuring the stability of the sample during transportation while having the ability to buffer impact strength. In addition, the device can control the clamping force of the sponge pads on the sample according to the specific stress conditions of the sample, thus solving the aforementioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sampling box for environmental testing, comprising a vertical storage mechanism, wherein the internal components include a storage box for storing samples, a longitudinal external threaded rod rotatably mounted at the center of the storage box axis, and a drive motor fixedly mounted at the bottom of the storage box and capable of driving the longitudinal external threaded rod to rotate; and multiple threaded clamping mechanisms, wherein the internal components include a polygonal shelf placed inside the storage box and capable of supporting the samples, a threaded sleeve rotatably mounted at the center of the polygonal shelf and mounted on the longitudinal external threaded rod body via a threaded structure, an annular contact plate capable of abutting against the outer circumferential wall of the threaded sleeve, and a helical spring capable of controlling the friction between the annular contact plate and the outer circumferential wall of the threaded sleeve.

[0006] Preferably, the vertical storage mechanism includes a support leg fixedly installed on the bottom side of the storage box, a lower connecting plate integrally formed with the top edge of the storage box, a storage cavity with an open top inside the storage box, a rotor mounting hole with an open bottom and a top end connecting to the bottom of the storage cavity at the center of the bottom of the storage box, a drive motor fixedly installed on the bottom of the storage box through a motor fixing housing, the rotor of the drive motor passing through the rotor mounting hole, and the rotor being mounted inside the rotor mounting hole through a bearing, and a longitudinal external threaded rod located inside the storage cavity being fixedly installed on the top of the drive motor located in the storage cavity through a coupling.

[0007] Preferably, the longitudinal axis of the longitudinal external thread rod is collinear with the longitudinal axis of the storage box, and both lie on the same vertical line.

[0008] Preferably, the threaded clamping mechanism includes a component mounting hole located at the center of the polygonal shelf and open at both ends. The bottom and top of the outer circumference of the threaded sleeve are mounted inside the component mounting hole via bearings. An internal threaded hole is located at the center of the threaded sleeve and mounted on the longitudinal external threaded rod via a threaded structure. The upper and lower surfaces of the polygonal shelf are each provided with a concave sponge embedding groove. A sponge disc is embedded inside the sponge embedding groove of the polygonal shelf. The surface of the sponge disc has a concave storage slot for placing samples. An annular movable cavity is located around the central area of ​​the component mounting hole on the polygonal shelf. Two symmetrical horizontal component movable cavities are located outside the annular movable cavity on the polygonal shelf. A connecting annular movable cavity is located inside the polygonal shelf. The moving cavity and the horizontal component moving cavity have rod perforations. The polygonal shelf has a liquid compensation channel inside that connects one end of the horizontal component moving cavity to the outside space and has a liquid valve installed inside. The polygonal shelf has a piston plate that can move along the axial direction of the horizontal component moving cavity inside the horizontal component moving cavity. The polygonal shelf has an internal movable plate that can move along the axial direction of the horizontal component moving cavity inside the horizontal component moving cavity. The piston plate is close to the liquid compensation channel, and the internal movable plate is close to the rod perforation. A helical spring in a compressed state is placed between the piston plate and the internal movable plate. A horizontal moving rod that passes through the rod perforation is fixedly installed at the end of the internal movable plate facing the rod perforation. An annular abutment plate that abuts against the outer circumferential wall of the threaded sleeve is fixedly installed at the end of the horizontal moving rod located inside the annular moving cavity.

[0009] Preferably, the outer peripheral surface of the polygonal shelf has the same structural shape as the cross-sectional shape of the storage cavity, both being polygonal structures, and the structural dimensions of the outer peripheral surface of the polygonal shelf match the structural dimensions of the cross-sectional shape of the storage cavity.

[0010] Preferably, the thread structure includes an internal thread structure disposed on the inner wall of the internal thread hole and an external thread structure disposed on the longitudinal external thread rod body, and the internal thread structure matches the external thread structure.

[0011] Preferably, the outer peripheral surface of the rod through the hole has the same structural shape as the cross-section of the horizontal movable rod, both being polygonal structures, and the structural dimensions of the outer peripheral surface of the rod through the hole match the structural dimensions of the cross-section of the horizontal movable rod.

[0012] Preferably, it also includes a universal lifting mechanism, which has a sealing cover that can be installed on the top of the storage box, a horizontal lifting rod that can lift the sealing cover, and a rotating ball head installed between the sealing cover and the horizontal lifting rod and providing an angle-variable connection.

[0013] Preferably, the universal lifting mechanism includes an upper connecting plate disposed at the edge of the sealing cover and capable of being fixedly connected to the lower connecting plate. The upper surface of the sealing cover is provided with a concave spherical mounting groove at its center. The sealing cover has a rotatable ball head installed inside the spherical mounting groove. A longitudinal movable rod is fixedly installed on the surface of the rotatable ball head. A horizontal lifting rod is fixedly installed at the top end of the longitudinal movable rod.

[0014] Preferably, the structural radius of the spherical mounting groove matches the structural radius of the rotating ball head, and the depth of the spherical mounting groove is greater than the structural radius of the rotating ball head and less than the structural diameter of the rotating ball head.

[0015] Compared with the prior art, the present invention provides a sampling box for environmental monitoring, which has the following beneficial effects: It can hold the collected sample between two sponge pads and provide an elastic clamping effect, thereby ensuring the stability of the sample during transportation while having the ability to buffer the impact strength. In addition, the device can control the clamping force of the sponge pads on the sample according to the specific stress conditions of the sample. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the present invention; Figure 3 This is a perspective view of the vertical storage mechanism of the present invention; Figure 4 This is a perspective cross-sectional view of the vertical storage mechanism in this invention; Figure 5 This is a perspective view of the threaded clamping mechanism in this invention; Figure 6 This is a three-dimensional cross-sectional view of the threaded clamping mechanism in this invention; Figure 7 This is a perspective view of the universal lifting mechanism in this invention; Figure 8 This is a three-dimensional cross-sectional view of the universal lifting mechanism in this invention.

[0017] The components include: 1. Vertical storage mechanism; 11. Storage box; 12. Support leg; 13. Lower connecting plate; 14. Storage cavity; 15. Rotor mounting hole; 16. Motor mounting housing; 17. Drive motor; 18. Coupling; 19. Longitudinal external threaded rod; 2. Threaded clamping mechanism; 21. Threaded sleeve; 22. Internal threaded hole; 23. Polygonal shelf; 24. Sponge embedding groove; 25. Sponge tray; 26. Storage slot; 27. Annular movable... 28. Moving cavity; 29. ​​Rod body perforation; 20. Horizontal component moving cavity; 210. Liquid compensation channel; 211. Annular contact plate; 212. Horizontal moving rod; 213. Internal moving plate; 214. Helical spring; 215. Piston plate; 216. Component mounting hole; 3. Universal lifting mechanism; 31. Sealing cover; 32. Upper connecting plate; 33. Spherical mounting groove; 34. Rotating ball head; 35. Longitudinal moving rod; 36. Horizontal lifting rod. Detailed Implementation

[0018] 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 embodiments of the present invention, and not all embodiments. Based on the 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.

[0019] Please see Figure 1 and Figure 2 A sampling box for environmental testing. This device is used to store whole samples or samples placed inside a sample collection container. Note that the sample must have a certain degree of pressure resistance to maintain its integrity.

[0020] To achieve complete sealed storage of the sample, please refer to Figure 2 , Figure 3 and Figure 4 The vertical storage mechanism 1 has a storage box 11 for storing samples, a longitudinal external threaded rod 19 that is rotatably installed at the center of the shaft of the storage box 11, and a drive motor 17 that is fixedly installed at the bottom of the storage box 11 and can drive the longitudinal external threaded rod 19 to rotate. Multiple samples can be placed inside the storage box 11, thereby achieving overall sealed storage of the samples.

[0021] For details regarding the specific structure of the vertical storage mechanism 1, please refer to [link / reference]. Figure 3 and Figure 4The storage box 11 includes a support leg 12 fixedly installed on the bottom side of the storage box 11. The storage box 11 has a lower connecting plate 13 integrally formed with it at the top edge. The storage box 11 has a storage cavity 14 with an open top. The storage box 11 has a rotor mounting hole 15 with an open bottom and a top end connecting to the bottom of the storage cavity 14 at the bottom center. The storage box 11 has a drive motor 17 fixedly installed at the bottom through a motor fixing housing 16. The rotor of the drive motor 17 passes through the rotor mounting hole 15 and is mounted inside the rotor mounting hole 15 through a bearing. The rotor of the drive motor 17 has a longitudinal external thread rod 19 fixedly installed inside the storage cavity 14 at the top of the storage cavity 14 through a coupling 18. The longitudinal axis of the longitudinal external thread rod 19 is collinear with the longitudinal axis of the storage box 11 and is on the same vertical line.

[0022] To achieve elastic compression fixation of the sample, please refer to [link / reference]. Figure 1 , Figure 2 , Figure 5 and Figure 6 Multiple threaded clamping mechanisms 2 are required. Each mechanism includes a polygonal shelf 23 housed inside the storage box 11 to support the sample; a threaded sleeve 21 rotatably mounted at the center of the polygonal shelf 23 and threaded onto the longitudinal external threaded rod 19; an annular contact plate 211 abutting against the outer circumferential wall of the threaded sleeve 21; and a helical spring 214 controlling the friction between the annular contact plate 211 and the outer circumferential wall of the threaded sleeve 21. The drive motor 17 is activated, and its rotor rotation direction is controlled. The longitudinal external threaded rod 19 rotates accordingly. Due to the threaded connection and the shape of the structure, the longitudinal external threaded rod 19 drives the threaded sleeve 21 upwards, which in turn drives the corresponding polygonal shelf 23 upwards. When the distance between the upper and lower sponge trays 25 is sufficient... When placing the sample, place it in the lower storage slot 26. Similarly, control the rotation direction of the rotor to move the polygonal shelf 23 downwards until multiple polygonal shelves 23 can no longer move downwards. At this time, the sample will be clamped between two corresponding sponge discs 25, thereby achieving elastic compression fixation of the sample. During the movement of the polygonal shelf 23, when the polygonal shelf 23 moves to the end, it can no longer move. At this time, the torsional resistance caused by the polygonal shelf 23 will be greater than the maximum friction force of the annular contact plate 211 on the threaded sleeve 21. At this time, the threaded sleeve 21 will rotate with the rotation of the longitudinal external thread rod 19. At the same time, the threaded sleeve 21 will not continue to drive the corresponding polygonal shelf 23 to move, thereby preventing damage to the drive motor 17 and preventing the sample from breaking due to excessive clamping force.

[0023] For details regarding the specific structure of the threaded clamping mechanism 2, please refer to [link / reference]. Figure 5 and Figure 6 The polygonal shelf 23 includes a component mounting hole 216 located at the center of the polygonal shelf 23 and open at both ends. The bottom and top of the outer circumference of the threaded sleeve 21 are mounted inside the component mounting hole 216 via bearings. The center of the threaded sleeve 21 is provided with an internal thread hole 22 that is mounted on the longitudinal external threaded rod 19 via a threaded structure. The upper and lower surfaces of the polygonal shelf 23 are provided with concave sponge embedding grooves 24. A sponge tray 25 is embedded in the polygonal shelf 23 within the sponge embedding grooves 24. The surface of the sponge tray 25 is provided with a concave storage groove 26 for placing samples. An annular movable cavity 27 is provided around the central area of ​​the component mounting hole 216. Two symmetrical horizontal component movable cavities 29 are provided on the outer side of the annular movable cavity 27. A rod through hole 28 connecting the annular movable cavity 27 and the horizontal component movable cavities 29 is provided inside the polygonal shelf 23. A liquid compensation channel 210 connecting one end of the horizontal component movable cavity 29 to the external space and housing a liquid valve is provided inside the polygonal shelf 23. A piston plate 215 capable of moving axially along the horizontal component movable cavity 29 is placed inside the polygonal shelf 23 within the horizontal component movable cavity 29. Inside the horizontal component movable cavity 29, the plate 23 has a built-in movable plate 213 that can move axially along the horizontal component movable cavity 29. The piston plate 215 is close to the liquid compensation channel 210, and the built-in movable plate 213 is close to the rod through hole 28. A compressed helical spring 214 is placed between the piston plate 215 and the built-in movable plate 213. A horizontal movable rod 212 that passes through the rod through hole 28 is fixedly installed at the end of the built-in movable plate 213 facing the rod through hole 28. An annular abutment plate 211 that abuts against the outer circumferential wall of the threaded sleeve 21 is fixedly installed at the end of the horizontal movable rod 212 located inside the annular movable cavity 27. The outer peripheral surface of the polygonal shelf 23 has the same structural shape as the cross-sectional shape of the storage cavity 14, both being polygonal structures. The structural dimensions of the outer peripheral surface of the polygonal shelf 23 match the structural dimensions of the cross-sectional shape of the storage cavity 14. The threaded structure includes an internal thread structure located on the inner wall of the internal threaded hole 22 and an external thread structure located on the longitudinal external thread rod 19. The internal thread structure matches the external thread structure. The outer peripheral surface of the rod through hole 28 has the same structural shape as the cross-sectional shape of the horizontal movable rod 212, both being polygonal structures. The structural dimensions of the outer peripheral surface of the rod through hole 28 match the structural dimensions of the cross-sectional shape of the horizontal movable rod 212.

[0024] To reduce the risk of collisions between internal objects such as sample collection containers due to tilting during transport, please refer to [link / reference needed]. Figure 1 , Figure 2 , Figure 7 and Figure 8 A universal lifting mechanism 3 needs to be installed, which includes a sealing cover 31 that can be installed on the top of the storage box 11, a horizontal lifting rod 36 that can lift the sealing cover 31, and a rotating ball head 34 installed between the sealing cover 31 and the horizontal lifting rod 36 and providing an angle-variable connection. When moving, the horizontal lifting rod 36 is lifted by hand. During the movement, due to the downward force of the device's gravity, the sealing cover 31 and the storage box 11 are always in a vertical state. This vertical state will keep the polygonal shelf 23 in a horizontal state, thereby ensuring that the samples inside the sample storage container and other bottle objects will not be subject to serious collisions, thus protecting the samples.

[0025] For details regarding the specific structure of the universal lifting mechanism 3, please refer to [link / reference]. Figure 7 and Figure 8 The sealing cover 31 includes an upper connecting plate 32 located at the edge of the sealing cover 31 and fixedly connected to the lower connecting plate 13. The upper surface of the sealing cover 31 has a concave spherical mounting groove 33 at its center. The sealing cover 31 has a rotatable ball head 34 installed inside the spherical mounting groove 33. A longitudinal movable rod 35 is fixedly installed on the surface of the ball head 34. A horizontal lifting rod 36 is fixedly installed at the top of the longitudinal movable rod 35. The structural radius of the spherical mounting groove 33 matches the structural radius of the ball head 34, and the depth of the spherical mounting groove 33 is greater than the structural radius of the ball head 34 and less than the structural diameter of the ball head 34.

[0026] In use, when taking or placing samples, open the sealing cover 31, start the drive motor 17, and control the rotation direction of its rotor. In addition, the longitudinal external thread rod 19 will rotate accordingly. Due to the connection of the threaded structure and the shape of the structure, the longitudinal external thread rod 19 will drive the threaded sleeve 21 to move upward. The threaded sleeve 21 will simultaneously drive the corresponding polygonal shelf 23 to move upward. When the distance between the upper layer sponge tray 25 and the lower layer sponge tray 25 is sufficient to place the sample, place the sample in the lower layer storage slot 26. Similarly, control the rotation direction of the rotor to make the polygonal shelf 23 move downward until multiple polygonal shelves 23 can no longer move downward. At this time, the sample will be clamped between two corresponding sponge trays 25, thereby achieving elastic compression fixation of the sample. During the movement of the polygonal shelf 23, when the polygonal shelf 23 moves to the end, the polygonal shelf 23 can no longer move. Using the above principle, the sample can be taken or placed.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sampling box for environmental monitoring, characterized in that: include, The vertical storage mechanism (1) is provided with a storage box (11) for storing samples, a longitudinal external thread rod (19) that is rotatably installed at the center of the shaft of the storage box (11), and a drive motor (17) that is fixedly installed at the bottom of the storage box (11) and can drive the longitudinal external thread rod (19) to rotate. And multiple threaded clamping mechanisms (2), which are provided with a polygonal shelf (23) placed inside the storage box (11) and capable of supporting the sample, a threaded sleeve (21) that is rotatably installed at the center of the polygonal shelf (23) and installed on the longitudinal external threaded rod (19) through a threaded structure, an annular contact plate (211) that can abut against the outer circumferential wall of the threaded sleeve (21), and a helical spring (214) that can control the friction between the annular contact plate (211) and the outer circumferential wall of the threaded sleeve (21).

2. The sampling box for environmental monitoring according to claim 1, characterized in that: The vertical storage mechanism (1) includes a support leg (12) fixedly installed on the bottom side of the storage box (11). The storage box (11) has a lower connecting plate (13) integrally formed with it at the top edge. The storage box (11) has a storage cavity (14) with the top open. The storage box (11) has a rotor mounting hole (15) with the bottom open and the top connected to the bottom of the storage cavity (14) at the center of the bottom. The storage box (11) has a drive motor (17) fixedly installed at the bottom through a motor fixing housing (16). The rotor of the drive motor (17) passes through the rotor mounting hole (15) and is mounted inside the rotor mounting hole (15) through a bearing. The rotor of the drive motor (17) has a longitudinal external thread rod (19) fixedly installed inside the storage cavity (14) at the top of the storage cavity (14) through a coupling (18).

3. A sampling box for environmental monitoring according to claim 2, characterized in that: The longitudinal axis of the longitudinal external thread rod (19) is collinear with the longitudinal axis of the storage box (11) and both lie on the same vertical line.

4. A sampling box for environmental monitoring according to claim 3, characterized in that: The threaded clamping mechanism (2) includes a component mounting hole (216) located at the center of the polygonal shelf (23) and open at both ends. The bottom and top of the outer circumference of the threaded sleeve (21) are mounted inside the component mounting hole (216) via bearings. The center of the threaded sleeve (21) is provided with an internal threaded hole (22) that is mounted on the longitudinal external threaded rod (19) via a threaded structure. The upper and lower surfaces of the polygonal shelf (23) are provided with concave sponge embedding grooves (24). The polygonal shelf (23) is located at... A sponge tray (25) is embedded inside the sponge embedding groove (24). The surface of the sponge tray (25) is provided with a concave structure for placing samples in a storage slot (26). The polygonal shelf (23) has an annular movable cavity (27) located around the central area of ​​the component mounting hole (216). The polygonal shelf (23) has two symmetrical horizontal component movable cavities (29) located outside the annular movable cavity (27). The polygonal shelf (23) has a rod connecting the annular movable cavity (27) and the horizontal component movable cavities (29) inside. The polygonal shelf (23) has a liquid compensation channel (210) inside the hole (28), which connects one end of the horizontal component movable cavity (29) to the outside space and is equipped with a liquid valve. The polygonal shelf (23) has a piston plate (215) inside the horizontal component movable cavity (29) that can move along the axial direction of the horizontal component movable cavity (29). The polygonal shelf (23) has an internal movable plate (213) inside the horizontal component movable cavity (29) that can move along the axial direction of the horizontal component movable cavity (29). The piston plate (215) Near the liquid compensation channel (210), the built-in movable plate (213) is near the rod through hole (28). A coil spring (214) in a compressed state is placed between the piston plate (215) and the built-in movable plate (213). A horizontal movable rod (212) that passes through the rod through hole (28) is fixedly installed at the end of the built-in movable plate (213) facing the rod through hole (28). An annular contact plate (211) that abuts against the outer circumferential wall of the threaded sleeve (21) is fixedly installed at the end of the horizontal movable rod (212) located inside the annular movable cavity (27).

5. A sampling box for environmental monitoring according to claim 4, characterized in that: The outer periphery of the polygonal shelf (23) has the same structural shape as the cross-section of the storage cavity (14), both being polygonal structures, and the structural dimensions of the outer periphery of the polygonal shelf (23) match the structural dimensions of the cross-section of the storage cavity (14).

6. A sampling box for environmental monitoring according to claim 5, characterized in that: The threaded structure includes an internal threaded structure located on the inner wall of the internal threaded hole (22) and an external threaded structure located on the body of the longitudinal external threaded rod (19), and the internal threaded structure matches the external threaded structure.

7. A sampling box for environmental monitoring according to claim 6, characterized in that: The outer periphery of the rod through hole (28) has the same structural shape as the cross-section of the horizontal movable rod (212), both being polygonal structures, and the structural dimensions of the outer periphery of the rod through hole (28) match the structural dimensions of the cross-section of the horizontal movable rod (212).

8. A sampling box for environmental monitoring according to any one of claims 2-7, characterized in that: It also includes a universal lifting mechanism (3), which has a sealing cover (31) that can be installed on the top of the storage box (11), a horizontal lifting rod (36) that can lift the sealing cover (31), and a rotating ball head (34) installed between the sealing cover (31) and the horizontal lifting rod (36) and providing an angle-variable connection.

9. A sampling box for environmental monitoring according to claim 8, characterized in that: The universal lifting mechanism (3) includes an upper connecting plate (32) located at the edge of the sealing cover (31) and fixedly connected to the lower connecting plate (13). The upper surface of the sealing cover (31) is provided with a concave spherical mounting groove (33). The sealing cover (31) has a rotatable rotating ball head (34) installed inside the spherical mounting groove (33). A longitudinal movable rod (35) is fixedly installed on the surface of the rotating ball head (34). A horizontal lifting rod (36) is fixedly installed at the top of the longitudinal movable rod (35).

10. A sampling box for environmental monitoring according to claim 9, characterized in that: The structural radius of the spherical mounting groove (33) matches the structural radius of the rotating ball head (34), and the depth of the spherical mounting groove (33) is greater than the structural radius of the rotating ball head (34) and less than the structural diameter of the rotating ball head (34).

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