Portable thrombus protection device

Abstract

The invention discloses a portable thrombus protection device, which belongs to the technical field of medical instruments and comprises a mounting table, a folding leg limiting mechanism, a foot supporting assembly and an ankle pump movement mechanism. A mounting box is fixedly mounted on the mounting table; a protection box is fixedly mounted in the middle of the top of the mounting box; a folding leg limiting mechanism is mounted on the rear side of the mounting table, and two foot supporting assemblies are symmetrically mounted on the two sides of the top of the mounting box; two ankle pump movement mechanisms used for driving the two foot supporting assemblies respectively are symmetrically installed on the installation box. The ankle pump movement mechanism comprises a driving module, an adjustable installation module and a transmission connection module. The folding leg limiting mechanism can be folded, the required space is low, so that the device is convenient to carry, the feet are driven to perform ankle movement through cooperation of the driving module, the adjustable mounting module and the transmission connection module, and blood return of the lower limbs of a patient is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a portable thrombosis prevention device. Background Technology

[0002] Blood clots form when blood abnormally clots within blood vessels. Thrombosis is common in the lower extremities, causing swelling and pain in the legs. If a thrombus breaks off, it can cause a pulmonary embolism, which can seriously endanger the patient's life. To protect the health of patients with thrombosis and those who have undergone thrombosis surgery, patients traveling long distances should perform ankle pump exercises regularly as prescribed by their doctor to promote blood return.

[0003] For example, Chinese patent CN218833133U discloses a medical ankle pump exercise automatic device. The device has a second drive motor installed in its storage compartment. The second drive motor drives the rotating shaft to rotate through the meshing of the active gear and the driven gear, so as to make the foot pedal produce pitching motion, thereby assisting the user to perform ankle pump exercises.

[0004] However, the device is not very portable; and different users have different ankle rotation ranges, making it difficult to adjust the overall range of motion according to the patient's needs and habits when performing ankle pump exercises.

[0005] Based on this, the present invention designs a portable thrombosis protection device to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a portable thrombosis prevention device.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A portable thrombosis protection device includes a mounting platform, a foldable leg restraint mechanism, a foot support assembly, and an ankle pump motion mechanism; An installation box is fixedly installed on the mounting platform, and a protective box is fixedly installed on the top center of the installation box; a foldable leg limiting mechanism is installed on the rear side of the mounting platform, and two foot support components are symmetrically installed on the top two sides of the installation box; two ankle pump movement mechanisms for driving the two foot support components are symmetrically installed on the installation box. The ankle pump motion mechanism includes a drive module, an adjustable mounting module, and a transmission connection module. The drive module is mounted on the mounting box, and the movable end of the drive module is equipped with an adjustable mounting module with adjustable height. The adjustable mounting module is equipped with a transmission connection module for driving the foot support component.

[0008] Furthermore, the foot support assembly includes a foot support module and a universal connection module, with the foot support module mounted on top of the universal connection module, and the universal connection module mounted on top of the mounting platform.

[0009] Furthermore, the universal connection module includes a mounting base, a mounting column, and a universal ball. The two mounting bases are fixedly installed on the top two sides of the mounting platform, and the mounting bases are provided with spherical grooves for limiting the universal ball. The universal ball is movably disposed in the spherical grooves. The top of the universal ball is fixedly connected to the bottom of the mounting column, and the top of the mounting column is connected to the bottom of the foot support module.

[0010] Furthermore, the foot support module includes a support platform and straps. The top of the mounting column is fixedly connected to the bottom of the support platform. The top surface of the support platform has a foot conformal groove for limiting and supporting the foot. Multiple sets of straps are symmetrically fixedly installed on the top of the support platform.

[0011] Furthermore, the drive module includes a drive motor, a drive gear, a transmission gear, and a rotation module. Both drive motors are fixedly installed at the top center of the mounting box and are located inside the protective box. The output end of the drive motor rotates through and extends into the interior of the mounting box and is fixedly connected to the drive gear. The two transmission gears are rotatably installed inside the mounting box, and the two drive gears are respectively meshed with the two transmission gears. The two rotation modules are installed on the mounting platform and are respectively connected to the two transmission gears.

[0012] Furthermore, the rotating module includes a gear ring and an annular limiting seat, which are rotatably connected to the top two sides of the mounting platform. The gear ring meshes with the transmission gear, and the annular limiting seat is fixedly installed at the bottom of the gear ring. Two annular platforms are fixedly installed on the top two sides of the mounting platform, and annular grooves are opened on the annular platforms. The annular limiting seat slides within the annular grooves.

[0013] Furthermore, the adjustable mounting module includes an annular gradient pad, a mounting bracket, and bolts. The annular gradient pad is fixedly mounted on the inner side of the gear ring. The top surface of the annular gradient pad is higher than the top surface of the gear ring, and the vertical distance between the top surface of the annular gradient pad and the top surface of the mounting platform varies at different positions. The bottom of the mounting bracket has an arc-shaped conformal groove, and the mounting bracket is slidably connected to the top of the annular gradient pad through the conformal groove at the bottom. Multiple locking grooves are evenly spaced in a circular array on the top surface of the annular gradient pad. Two bolts are threadedly connected to the mounting bracket, and the bottom of the bolts passes through the mounting bracket and is threadedly connected to the locking grooves.

[0014] Furthermore, the transmission connection module includes an annular connecting platform, an upper ball head, a telescopic rod, and a spring. The two annular connecting platforms are respectively fixedly installed on the bottom of the two support platforms. The top side of the upper ball head rolls within a sliding groove opened at the bottom of the annular connecting platform. A spherical groove is opened at the top of the telescopic rod, and the bottom side of the upper ball head rolls within the spherical groove at the top of the telescopic rod. The bottom of the telescopic rod is fixedly connected to the middle of the top surface of the mounting frame. A compressed spring is fitted over the telescopic rod. The top of the spring is fixedly connected to the top of the telescopic rod, and the bottom of the spring is fixedly connected to the top surface of the mounting frame.

[0015] Compared with the prior art, the beneficial effects of this invention are as follows: When not in use, the foldable leg restraint mechanism of this invention can be folded to reduce the required space, thus facilitating portability and making it convenient for patients to carry during long-distance travel. When in use, the patient unfolds the foldable leg restraint mechanism; then, the foot is supported and fixed by two symmetrically arranged foot support components on the mounting platform, and the foldable leg restraint mechanism provides limiting support for the patient's lower leg; then, according to usage habits and needs, the adjustable mounting module is operated to adjust the vertical distance between the transmission connection module on the adjustable mounting module and the mounting platform.

[0016] In use, the drive module drives the adjustable mounting module, which in turn moves the transmission connection module. The transmission connection module contacts different positions on the bottom of the foot support component, causing the foot support component to move. This, in turn, moves the patient's foot. By operating the adjustable mounting module, the range of motion of the foot support component is changed, indirectly altering the range of motion of the patient's ankle. This makes the invention suitable for different patients, assisting them in ankle pump exercises. This ensures blood return to the lower limbs during long-distance travel, preventing blood pooling in the lower limb veins, preventing venous thrombosis, and reducing lower limb edema. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 A three-dimensional portable thrombosis prevention device of the present invention Figure 1 ; Figure 2 This is a front view of a portable thrombosis prevention device according to the present invention; Figure 3This is a left view of a portable thrombosis prevention device according to the present invention; Figure 4 For along Figure 3 A three-dimensional view after part of the structure has been removed along the AA direction; Figure 5 A three-dimensional portable thrombosis prevention device of the present invention Figure 2 ; Figure 6 for Figure 4 Enlarged view of point B in the middle; Figure 7 This is a schematic diagram of the mounting platform and its connection structure. Figure 8 This is a schematic diagram of the gear ring and its connection structure.

[0019] The labels in the diagram represent: 1. Mounting platform; 11. Mounting box; 12. Protective box; 2. Folding leg limiting mechanism; 21. Storage box; 22. Mounting pad; 23. Inner connecting rod; 24. Outer connecting rod; 25. Limiting plate; 26. Support plate; 3. Foot support assembly; 31. Mounting base; 32. Mounting column; 33. Omnidirectional ball; 34. Support platform; 35. Foot conformal groove; 36. Strap; 4. Ankle pump movement mechanism; 41. Drive module ; 411. Drive motor; 412. Drive gear; 413. Transmission gear; 414. Gear ring; 415. Annular groove; 416. Annular limit seat; 42. Adjustable mounting module; 421. Annular gradient pad; 422. Mounting bracket; 423. Bolt; 424. Locking groove; 43. Transmission connection module; 431. Annular connecting platform; 432. Upper ball head; 433. Telescopic round rod; 434. Spring. Detailed Implementation

[0020] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0022] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-4A portable thrombosis prevention device includes a mounting platform 1, a foldable leg limiting mechanism 2, a foot support assembly 3, and an ankle pump motion mechanism 4. A mounting box 11 is fixedly mounted on the mounting platform 1, and a protective box 12 is fixedly mounted on the top center of the mounting box 11. The foldable leg limiting mechanism 2 is mounted on the rear side of the mounting platform 1, and two foot support assemblies 3 are symmetrically mounted on the top two sides of the mounting box 11. Two ankle pump motion mechanisms 4 for driving the two foot support assemblies 3 are symmetrically mounted on the mounting box 11.

[0023] like Figure 2 and Figure 4 As shown, the ankle pump motion mechanism 4 includes a drive module 41, an adjustable mounting module 42, and a transmission connection module 43. The drive module 41 is mounted on the mounting box 11. The movable end of the drive module 41 is mounted with an adjustable mounting module 42 with adjustable height. The adjustable mounting module 42 is mounted with a transmission connection module 43 for driving the foot support component 3.

[0024] In this embodiment, when the portable thrombosis prevention device is in normal operation and not in use, the foldable leg limiting mechanism 2 can be folded to reduce the required space, making it easier to carry the device and thus convenient for patients to take on long-distance travel. When using the device, the patient unfolds the foldable leg limiting mechanism 2; then, the feet are supported and fixed by two symmetrically arranged foot support components 3 on the mounting platform 1, and the foldable leg limiting mechanism 2 provides limiting support for the patient's lower legs; then, according to usage habits and needs, the patient operates the adjustable mounting module 42 to adjust the vertical distance between the transmission connection module 43 on the adjustable mounting module 42 and the mounting platform 1. In use, the drive module 41 drives the adjustable mounting module 42 to operate, and the adjustable mounting module 42 drives the transmission connection module 43 to move. Through the transmission connection module 43, it contacts different positions on the bottom of the foot support component 3, so that the foot support component 3 can move. Thus, the foot support component 3 drives the patient's foot to move. By operating the adjustable mounting module 42, the range of motion of the foot support component 3 can be changed, thereby indirectly changing the range of motion of the patient's ankle, making it suitable for different patients and assisting patients in ankle pump exercises. Thus, when patients travel long distances, it ensures blood return to the lower limbs, avoids blood pooling in the lower limb veins, prevents venous thrombosis, and reduces lower limb edema.

[0025] Example 2: In some embodiments, as a preferred embodiment of the present invention, such as... Figure 5 As shown, the folding leg limiting mechanism 2 includes a storage box 21, a folding support module, and a support plate 26. The storage box 21 is fixedly installed on the rear side of the mounting platform 1. Two sets of folding support modules are symmetrically installed inside the storage box 21. The support plate 26 for limiting the folding support module is placed inside the storage box 21.

[0026] The folding support module includes a mounting pad 22, an inner connecting rod 23, an outer connecting rod 24, and a limiting plate 25. The front side of the mounting pad 22 is fixedly mounted on the front inner wall of the storage box 21, and the two mounting pads 22 have different thicknesses. One end of the inner connecting rod 23 is rotatably mounted on the rear side of the mounting pad 22, and the other end of the inner connecting rod 23 is rotatably connected to the rear side of the limiting plate 25. One end of the outer connecting rod 24 is rotatably mounted on the mounting pad 22, and the other end of the outer connecting rod 24 is rotatably connected to the rear side of the limiting plate 25. The inner connecting rod 23 and the outer connecting rod 24 are of equal length and parallel to each other. The outer connecting rod 24 is closer to the rear inner wall of the storage box 21. The front side of the limiting plate 25 is provided with a conformal support groove that conforms to the shape of the lower leg. When the inner connecting rod 23 and the outer connecting rod 24 are stored in the storage box 21, the support plate 26 presses on the top of the inner connecting rod 23 and the outer connecting rod 24. When the inner connecting rod 23 and the outer connecting rod 24 are unfolded and perpendicular to the storage box 21, the support plate 26 is located between the two sets of inner connecting rods 23.

[0027] In some embodiments, such as Figure 4 As shown, the foot support assembly 3 includes a foot support module and a universal connection module. The foot support module is installed on top of the universal connection module, and the universal connection module is installed on top of the mounting platform 1.

[0028] Specifically, the universal connection module includes a mounting base 31, a mounting column 32, and a universal ball 33. The two mounting bases 31 are fixedly installed on the top two sides of the mounting platform 1, respectively. The mounting base 31 is provided with a spherical groove for limiting the universal ball 33, and the universal ball 33 is movably disposed in the spherical groove. The top of the universal ball 33 is fixedly connected to the bottom of the mounting column 32, and the top of the mounting column 32 is connected to the bottom of the foot support module.

[0029] The foot support module includes a support platform 34 and straps 36. The top of the mounting column 32 is fixedly connected to the bottom of the support platform 34. The top surface of the support platform 34 is provided with a foot conformal groove 35 for limiting and supporting the foot. Multiple sets of straps 36 are symmetrically fixedly installed on the top of the support platform 34.

[0030] In some embodiments, such as Figures 6-8As shown, the drive module 41 includes a drive motor 411, a drive gear 412, a transmission gear 413, and a rotation module. The two drive motors 411 are fixedly installed at the top center of the mounting box 11. The two drive motors 411 are located inside the protective box 12. The output end of the drive motor 411 rotates through and extends into the mounting box 11 and is fixedly connected to the drive gear 412. The two transmission gears 413 are rotatably installed inside the mounting box 11. The two drive gears 412 are respectively meshed with the two transmission gears 413. The two rotation modules are installed on the mounting platform 1 and are respectively connected to the two transmission gears 413.

[0031] The rotating module includes a gear ring 414 and an annular limiting seat 416, which are rotatably connected to the top two sides of the mounting platform 1. The gear ring 414 meshes with the transmission gear 413, and the annular limiting seat 416 is fixedly installed at the bottom of the gear ring 414. Two annular platforms are fixedly installed on the top two sides of the mounting platform 1, and annular grooves 415 are opened on the annular platforms. The annular limiting seat 416 slides in the annular grooves 415 for limitation.

[0032] The adjustable mounting module 42 includes an annular gradient pad 421, a mounting bracket 422, and bolts 423. The annular gradient pad 421 is fixedly mounted on the inner side of the gear ring 414. The top surface of the annular gradient pad 421 is higher than the top surface of the gear ring 414. The vertical distance between the top surface of the annular gradient pad 421 and the top surface of the mounting platform 1 varies at different positions. The bottom of the mounting bracket 422 is provided with an arc-shaped conformal groove. The mounting bracket 422 is slidably connected to the top of the annular gradient pad 421 through the conformal groove at the bottom. Multiple locking grooves 424 are provided in a circumferential array at equal intervals on the top surface of the annular gradient pad 421. Two bolts 423 are threadedly connected to the mounting bracket 422. The bottom of the bolts 423 passes through the mounting bracket 422 and is threadedly connected to the locking grooves 424.

[0033] The transmission connection module 43 includes an annular connecting platform 431, an upper ball head 432, a telescopic rod 433, and a spring 434. Two annular connecting platforms 431 are fixedly installed at the bottom of two support platforms 34. The top side of the upper ball head 432 rolls within a sliding groove at the bottom of the annular connecting platform 431. The top of the telescopic rod 433 has a spherical groove, and the bottom side of the upper ball head 432 rolls within the spherical groove at the top of the telescopic rod 433. The bottom of the telescopic rod 433 is fixedly connected to the center of the top surface of the mounting bracket 422. A compressed spring 434 is fitted over the telescopic rod 433. The top of the spring 434 is fixedly connected to the top of the telescopic rod 433, and the bottom of the spring 434 is fixedly connected to the mounting bracket 422. The top of the telescopic rod 433 can extend and retract.

[0034] In this embodiment, when the folding leg limiting mechanism 2, the foot support assembly 3, and the ankle pump motion mechanism 4 are working normally, in the initial state, the inner connecting rod 23 and the outer connecting rod 24 are located inside the storage box 21, and the support plate 26 is placed on the inner connecting rod 23 and the outer connecting rod 24. In use, the support plate 26 is removed, and then the inner connecting rod 23 and the outer connecting rod 24 are rotated upward until the inner connecting rod 23 and the outer connecting rod 24 are perpendicular to the storage box 21. The inner connecting rod 23 and the outer connecting rod 24 drive the limiting plate 25 to the top. Then the support plate 26 is placed in the storage box. Inside the box 21, the two ends of the support plate 26 abut against the inner connecting rods 23 on both sides, forming a limit on the inner connecting rods 23 and preventing the inner connecting rods 23 from rotating inward; then the patient places their foot in the foot conformal groove 35 on the support platform 34, and the limiting plate 25 supports and limits the patient's lower leg; by tightening multiple sets of straps 36, the patient's foot is supported and fixed; at the same time, the bottom of the support platform 34 is connected to the mounting base 31 through the mounting column 32 and the universal ball 33, allowing the support platform 34 to rotate at multiple angles; Before use, adjust the position of the mounting bracket 422 on top of the annular gradient pad 421 according to the patient's usage habits. When the mounting bracket 422 moves to different positions on the annular gradient pad 421, the distance between the top surface of the annular gradient pad 421 and the top surface of the mounting platform 1 will be different, resulting in different distances between the mounting bracket 422 on top of the annular gradient pad 421 and the top surface of the mounting platform 1. Then tighten the bolts 423 to fix the mounting bracket 422 and the annular gradient pad 421. At this time, the upper ball head 432 supports one side of the bottom of the annular connecting platform 431, and the upper ball head 432 and the annular connecting platform 431 make the support platform 34 tilt in one direction. In use, the drive motor 411 drives the drive gear 412 to rotate, and the drive gear 412 drives the gear ring 414 to move through the transmission gear 413. The gear ring 414 rotates under the limiting action of the annular groove 415 and the annular limiting seat 416, thereby driving the annular gradient pad 421 on the gear ring 414 to rotate. The rotation of the annular gradient pad 421 drives the mounting bracket 422, the telescopic rod 433 and the upper ball head 432 to rotate, so that the upper ball head 432 contacts different positions on the bottom of the annular connecting platform 431. Thus, through the cooperation of the upper ball head 432 and the annular connecting platform 431, the support platform 34 is driven to move, thereby driving the patient's foot to move. During this process, the rotation angle of the support platform 34 can be slightly adjusted through the cooperation of the telescopic rod 433 and the spring 434, thereby ensuring the safety of the patient.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A portable thrombosis prevention device, comprising a mounting platform (1), characterized in that: It also includes a folding leg restraint mechanism (2), a foot support assembly (3), and an ankle pump motion mechanism (4). An installation box (11) is fixedly installed on the mounting platform (1), and a protective box (12) is fixedly installed on the top center of the installation box (11); a foldable leg limiting mechanism (2) is installed on the rear side of the mounting platform (1), and two foot support components (3) are symmetrically installed on the top two sides of the installation box (11); two ankle pump motion mechanisms (4) for driving the two foot support components (3) respectively are symmetrically installed on the installation box (11). The ankle pump motion mechanism (4) includes a drive module (41), an adjustable mounting module (42), and a transmission connection module (43). The drive module (41) is mounted on the mounting box (11). The movable end of the drive module (41) is equipped with an adjustable mounting module (42) with adjustable height. The adjustable mounting module (42) is equipped with a transmission connection module (43) for driving the foot support component (3) to operate.

2. The portable thrombosis prevention device according to claim 1, characterized in that, The foot support assembly (3) includes a foot support module and a universal connection module. The foot support module is installed on top of the universal connection module, and the universal connection module is installed on top of the mounting platform (1).

3. The portable thrombosis prevention device according to claim 2, characterized in that, The universal connection module includes a mounting base (31), a mounting column (32), and a universal ball (33). The two mounting bases (31) are fixedly installed on the top two sides of the mounting platform (1). The mounting base (31) has a spherical groove for limiting the universal ball (33), and the universal ball (33) is movably disposed in the spherical groove. The top of the universal ball (33) is fixedly connected to the bottom of the mounting column (32), and the top of the mounting column (32) is connected to the bottom of the foot support module.

4. The portable thrombosis prevention device according to claim 3, characterized in that, The foot support module includes a support platform (34) and straps (36). The top of the mounting column (32) is fixedly connected to the bottom of the support platform (34). The top surface of the support platform (34) is provided with a foot conformal groove (35) for limiting and supporting the foot. Multiple sets of straps (36) are symmetrically fixedly installed on the top of the support platform (34).

5. The portable thrombosis prevention device according to claim 4, characterized in that, The drive module (41) includes a drive motor (411), a drive gear (412), a transmission gear (413), and a rotation module. The two drive motors (411) are fixedly installed at the top center of the mounting box (11). The two drive motors (411) are located inside the protective box (12). The output end of the drive motor (411) rotates through and extends into the mounting box (11) and is fixedly connected to the drive gear (412). The two transmission gears (413) are rotatably installed inside the mounting box (11). The two drive gears (412) are respectively meshed with the two transmission gears (413). The two rotation modules are installed on the mounting platform (1) and are respectively connected to the two transmission gears (413).

6. The portable thrombosis prevention device according to claim 5, characterized in that, The rotating module includes a gear ring (414) and an annular limiting seat (416), which are rotatably connected to the top two sides of the mounting platform (1). The gear ring (414) meshes with the transmission gear (413), and the annular limiting seat (416) is fixedly installed at the bottom of the gear ring (414). Two annular platforms are fixedly installed on the top two sides of the mounting platform (1), and annular grooves (415) are opened on the annular platforms. The annular limiting seat (416) slides in the annular grooves (415) for limitation.

7. The portable thrombosis prevention device according to claim 6, characterized in that, The adjustable mounting module (42) includes an annular gradient pad (421), a mounting bracket (422), and bolts (423). The annular gradient pad (421) is fixedly mounted on the inner side of the gear ring (414). The top surface of the annular gradient pad (421) is higher than the top surface of the gear ring (414). The vertical distance between the top surface of the annular gradient pad (421) and the top surface of the mounting platform (1) is different at different positions. The bottom of the mounting bracket (422) is provided with an arc-shaped conformal groove. The mounting bracket (422) is connected to the top of the annular gradient pad (421) through the conformal groove at the bottom. Multiple locking grooves (424) are provided in a circular array at equal intervals on the top surface of the annular gradient pad (421). Two bolts (423) are threaded on the mounting bracket (422). The bottom of the bolts (423) passes through the mounting bracket (422) and is threaded to the locking grooves (424).

8. The portable thrombosis prevention device according to claim 7, characterized in that, The transmission connection module (43) includes an annular connecting platform (431), an upper ball head (432), a telescopic rod (433), and a spring (434). The two annular connecting platforms (431) are respectively fixedly installed at the bottom of the two support platforms (34). The top side of the upper ball head (432) is rolled in the sliding groove opened at the bottom of the annular connecting platform (431). The top of the telescopic rod (433) is provided with a spherical groove. The bottom side of the upper ball head (432) is rolled in the spherical groove at the top of the telescopic rod (433). The bottom of the telescopic rod (433) is fixedly connected to the middle of the top surface of the mounting frame (422). The telescopic rod (433) is covered with a spring (434) in a compressed state. The top of the spring (434) is fixedly connected to the top of the telescopic rod (433), and the bottom of the spring (434) is fixedly connected to the top surface of the mounting frame (422).

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