Strength training equipment for physical exercise
The strength training device stabilizes the horizontal bar and reduces sweat and safety risks through a vibration-damping and cleaning mechanism, addressing wobbling and grip issues in pull-up exercises.
Patent Information
- Application Number
- JP2025515319
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-11-17
- Filing Date
- 2024-10-30
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2044-10-30
AI Technical Summary
Existing horizontal bar equipment for pull-ups wobbles during use, posing safety risks due to potential breakage and increased hand sweat leading to reduced friction and falling hazards.
A strength training device with vibration-damping reinforcement mechanism and cleaning protection mechanism, featuring a hexagonal shell, annular bag, and sliding components to stabilize the bar, reduce sweat, and enhance anti-slip performance.
Stabilizes the horizontal bar during exercise, reduces hand sweat, and improves safety by preventing device damage and enhancing grip, while allowing for easy cleaning.
Smart Images

Figure 2026500887000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to the technical field of sporting goods, and in particular to strength training devices for physical exercise. [Background technology]
[0002] Physical exercise is a sporting activity that people choose based on their own physical needs, using various sporting methods and combining natural forces and hygienic measures, with the objectives of physical development, health promotion, strengthening of physical strength, mental conditioning, enrichment of cultural life, and leisure management. Generally, it is classified into horizontal bars, parallel bars, dumbbells, etc., and among these, horizontal bars are usually used for performing exercises such as pull-ups to strengthen the muscles of the upper body, back, and core.
[0003] However, with existing horizontal bar equipment, the center of gravity must be placed on the bar during the pull-up process, which causes the bar to wobble slightly during the movement. If pull-ups are performed for a long period of time, the bar may break or come loose, posing a safety risk that could affect the life and safety of the trainee. At the same time, the hands may become profusely sweaty during the training process, which reduces friction between the hands and increases the risk of falling, potentially causing harm to the trainee. Summary of the Invention [Problem to be solved by the invention]
[0004] In view of the shortcomings of the prior art, the present invention provides a strength training device for physical exercise to solve the problems mentioned in the background section above. [Means for solving the problem]
[0005] The object of the present invention is achieved as follows: A strength training device for physical exercise includes two horizontal bar supports, with one horizontal bar fixed between the tops of the two supports. A disk is attached to the top of the support on the opposite side of the horizontal bar, and a plurality of round holes are drilled in the top of one side of the disk. The device further includes a vibration-damping reinforcement mechanism, which has a hexagonal shell fixedly connected to the lower end of the outer wall of the horizontal bar support, with a plurality of slide holes formed around the outer wall of the hexagonal shell. A ring-shaped bag is attached to one end of the outer wall of the support near the hexagonal shell and fixedly connected to the support, and both ends of the top of the ring-shaped bag are connected to a curved pipe. An extrusion is attached to the inner wall of the hexagonal shell. The device further includes a cleaning protection mechanism, which has a first rubber sleeve connected to one end of the pipe, the first rubber sleeve being hollow, and a second rubber sleeve attached to the inner wall of the first rubber sleeve and fixedly connected thereto. The outer wall of the first rubber sleeve is provided with a plurality of ventilation holes, and the inner cavity of the second rubber sleeve is provided with a cleaning element.
[0006] In a preferred technical solution of the strength training device for physical exercise of the present invention, the extrusion part includes multiple partitions fixed around the bottom of the inner wall of the hexagonal shell. During pull-ups, excessive movement can cause the horizontal bar to swing. During the swinging process, tilting occurs, and the clamping force caused by the tilting causes the curved bar to move up and down. The up and down movement of the curved bar drives the rotating bar, which in turn drives the fixed ring. This enhances the stabilization effect of the multiple fixed rings and prevents damage to the device due to violent movement. The movement of the fixed ring compresses the lifting plate, which in turn moves the extrusion plate, compressing the annular bag. The installation of a return spring allows the pressure plate to compress the annular bag in different ways during movement. When the annular bag is compressed, the generated air flows through the curved pipe into the first rubber sleeve and is exhausted through multiple ventilation holes in the first rubber sleeve. This reduces hand sweat during exercise and, combined with the first rubber cover, improves anti-slip performance, enhancing personal safety and protection. A slidable lifting plate is connected between the two isolation plates, and a return spring is connected to each end of the bottom of the lifting plate, and the bottom of the return spring is fixedly connected to the bottom of the inner wall of the hexagonal shell.
[0007] In a preferred technical solution of the strength training device for physical exercise of the present invention, a vertical bar is fixedly connected to the center of the top of the lifting plate, and one end of the vertical bar opposite the lifting plate penetrates the hexagonal shell and extends outside the hexagonal shell, and a push-out plate is fixedly connected to the top of the vertical bar.
[0008] As a preferred technical solution of the muscle training device for physical exercise of the present invention, a reinforcing part is provided on the inner wall of the slide hole, and the reinforcing part includes a curved bar slidably connected to the lower end of the inner wall of the slide hole, and a rotating bar is passed through each end of one side of the curved bar and rotatably connected to each end.
[0009] As a preferred technical solution of the muscle training device for physical exercise of the present invention, the outer walls of both ends of the rotating bar are fixedly connected to fixed rings, and the outer surfaces of the fixed rings located at the top are slidably connected to the inner walls of the hexagonal shell and come into contact with each other.
[0010] In a preferred technical solution for the strength training device for physical exercise according to the present invention, the cleaning component includes arc-shaped sleeves slidably connected to both ends of the inner wall of the second rubber sleeve. When exercise is completed, the pressure inside the first rubber sleeve is released and the air pressure returns to normal. At the same time, the auxiliary spring rebounds, moving the arc-shaped sleeve in the opposite direction. The elastic effect of the auxiliary spring allows the protective component to move repeatedly, and the arrangement of the auxiliary sliding sleeve and cleaning cotton block allows repeated cleaning of the inner and outer surfaces of the first rubber sleeve. This reduces sweat adhesion to the first rubber sleeve, preventing odor and stickiness caused by long-term sweat adhesion and improving the aesthetic appearance of the device. Additionally, multiple auxiliary springs are fixedly connected around one end of the arc-shaped sleeve, and second magnetic rings are slidably connected to the inner walls of both ends of the first rubber sleeve's inner cavity.
[0011] As a preferred technical solution of the strength training device for physical exercise of the present invention, a plurality of hexagonal holes are provided around one side of the second magnetic ring, an auxiliary sliding sleeve is fixedly installed on the outer wall of the second magnetic ring, and the outer wall of the auxiliary sliding sleeve is slidably connected to the outer wall of the inner cavity of the first rubber sleeve.
[0012] As a preferred technical solution of the strength training device for physical exercise of the present invention, a protective part is provided on the outer wall of the second magnetic ring, and the protective part includes a plurality of connecting rods fixedly connected around the outer wall of the second magnetic ring, one end of the connecting rods passes through the auxiliary sliding sleeve and extends outside the auxiliary sliding sleeve, and a plurality of strip holes are respectively opened around the outer wall of the first rubber sleeve.
[0013] In a preferred technical solution of the strength training device for physical exercise according to the present invention, the outer wall of the connecting rod is slidably connected to the inner wall of the strip hole. The end of the connecting rod remote from the second magnetic ring is fixedly connected to the periphery of the inner wall of the ring-shaped plate. Several cleansing cotton blocks are fixedly connected to the periphery of the inner wall of the ring-shaped plate, and several reinforcing bars are fixedly connected to the upper part of one side of the ring-shaped plate. During use, when a person exercises, they place their hand on the outside of the first rubber sleeve and grip it. The gripping force compresses and deforms the second rubber sleeve, and the internal airflow pushes the two arc-shaped sleeves outward, which in turn moves the first magnetic ring. The magnetic force of the first magnetic ring moves the second magnetic ring, which drives the auxiliary sliding sleeve, which drives the connecting rod, which drives the ring-shaped plate, which drives the cleansing cotton blocks, which drives the ring-shaped plate, which drives the reinforcing bars, which are aligned with the circular holes set in the disk. This increases the stabilization effect of the entire device, reduces shaking during suspension, and prevents damage to the device. [Effects of the Invention]
[0014] Compared with the prior art, the present invention has the following advantageous effects: (1) During use, when a person exercises, they place their hand on the outside of the first rubber sleeve and grip it. The gripping force compresses and deforms the second rubber sleeve. The internal airflow pushes the two arc-shaped sleeves outward, which then moves the first magnetic ring. The magnetic force of the first magnetic ring moves the second magnetic ring, which drives the auxiliary sliding sleeve, which drives the connecting rod, which drives the ring-shaped plate, which drives the cleaning cotton block, which drives the reinforcing rod, which is aligned with the circular hole set in the disk. This improves the stabilization effect of the entire device, reduces shaking during suspension, and prevents damage to the device.
[0015] (2) During pull-ups, excessive movement can cause the horizontal bar to swing. The tilting motion creates a clamping force, causing the curved bar to move up and down. The vertical movement of the curved bar drives the rotating bar, which in turn drives the fixed ring. The multiple fixed rings enhance the stabilization effect of the device and prevent damage to the device due to violent movements. The movement of the fixed ring compresses the lifting plate, which in turn moves the pushing plate, which compresses the annular bag. A return spring allows the pushing plate to compress the annular bag during movement. When the annular bag is compressed, air flows through the curved pipe into the first rubber sleeve and is exhausted through the multiple ventilation holes in the first rubber sleeve. This reduces hand sweat during exercise and, combined with the first rubber cover, improves anti-slip performance, enhancing safety and protection.
[0016] (3) When exercise is finished, the pressure inside the first rubber sleeve is released and the air pressure returns to normal. At the same time, the auxiliary spring rebounds, causing the arc-shaped sleeve to move in the opposite direction. The elastic effect of the auxiliary spring allows the protective part to move repeatedly, and the arrangement of the auxiliary sliding sleeve and cleaning cotton block allows the inner and outer surfaces of the first rubber sleeve to be repeatedly cleaned. This reduces sweat adhesion to the first rubber sleeve, preventing odors and stickiness caused by long-term sweat adhesion and improving the aesthetic appearance of the device. [Brief explanation of the drawings]
[0017] In order to more clearly describe the embodiments of the present invention or the technical solutions of the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. Those skilled in the art can obtain other drawings based on the provided drawings without any creative efforts. [Figure 1] 1 is a schematic side view of the overall structure of the present invention. [Figure 2] 1 is a schematic diagram of the overall cross-sectional structure of the present invention. [Figure 3] 2 is a schematic diagram of a side structure of the cleaning protection mechanism of the present invention. FIG. [Figure 4] 3 is a schematic diagram of a portion of the side structure of the vibration-damping reinforcement mechanism of the present invention. FIG. [Figure 5] 1 is a schematic cross-sectional view of a reinforcing part according to the present invention; [Figure 6] 1 is a schematic diagram of the internal side structure of an extruded part of the present invention. [Figure 7] 1 is a schematic diagram of a half-sectional structure of a protective component of the present invention as viewed from above. [Figure 8] 1 is a schematic diagram of the internal structure of a protective component of the present invention. [Figure 9] FIG. 8 is an enlarged view of A in FIG. 7 of the present invention. DETAILED DESCRIPTION OF THE INVENTION
[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention, but obviously, the described embodiments are only a part, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.
[0019] The strength training device for physical exercise as shown in Figures 1 to 9 comprises two horizontal bar supports 1, with one horizontal bar 2 fixedly connected between the tops of the two supports 1, a mounting 3 fixedly installed at the top of the opposite side of the horizontal bar 2, and multiple round holes 4 at the top of one side of the mounting 3. The purpose of this arrangement is to promote stabilization of the device. It also includes the following:
[0020] The vibration-damping reinforcement mechanism 5 comprises a hexagonal shell 51 fixedly connected to the lower end of the outer wall of the support column 1 in the form of a sleeve. A plurality of slide holes 56 are provided around the periphery of the outer wall of the hexagonal shell 51. An annular bag 52 is provided at one end of the outer wall of the hexagonal shell 51 and is fixedly connected to the support column. The purpose of this arrangement is to generate airflow, and a curved pipe 53 is connected to each end of the top of the annular bag 52, and an extrusion part 54 is provided on the inner wall of the hexagonal shell 51.
[0021] The cleaning and protection mechanism 6 includes a first rubber sleeve 61 connected to one end of the curved pipe 53. The first rubber sleeve 61 is formed hollow. The first rubber sleeve 61 has a second rubber sleeve 62 fixed to its inner wall. The inner wall of the second rubber sleeve 62 is sleeve-shaped and fixedly connected to the outer wall of the single electrode 2. A plurality of ventilation holes 63 are provided around the outer wall of the first rubber sleeve 61. The purpose of this arrangement is to release air and reduce hand sweat. A cleaning element 64 is provided in the inner cavity of the second rubber sleeve 62.
[0022] The extrusion part 54 includes a plurality of partitions 541 fixedly connected to the periphery of the bottom of the inner wall of the hexagonal shell 51. The purpose of this arrangement is to prevent the devices from interfering with each other. A lifting plate 542 is slidably connected between the two partitions 541. Both ends of the bottom of the lifting plate 542 are fixedly connected to return springs 543, respectively. The bottom of the return spring 543 is fixedly connected to the bottom of the inner wall of the hexagonal shell.
[0023] The upper center of the lifting plate 542 is fixedly connected to a vertical rod 544. One end of the vertical rod 544 opposite the lifting plate 542 passes through the hexagonal shell 51 and extends to the outside of the hexagonal shell 51. The top of the vertical rod 544 is fixedly connected to a push-out plate 545. The purpose of this arrangement is to compress the annular bag 52.
[0024] A reinforcing part 55 is provided on the inner wall of the slide hole 56. The reinforcing part 55 has a curved rod 551 slidably connected to the lower end of the inner wall of the slide hole 56. The purpose of this arrangement is that a rotating rod 552 passes through each end of one side of the curved rod 551 and is rotatably connected thereto.
[0025] The outer walls of both ends of the rotating rod 552 are fixedly connected to fixed rings 553. The outer surfaces of the fixed rings 553 located at the top are slidably connected to the inner walls of the hexagonal shell and come into contact with each other. The purpose of this arrangement is to facilitate lifting and lowering operations.
[0026] The cleaning parts 64 each have a sleeve-like shape and include arc-shaped sleeves 641 slidably connected to both ends of the inner wall of the second rubber sleeve 62. The purpose of this arrangement is to reduce friction during movement. A plurality of auxiliary springs 643 are fixedly connected around one end of the arc-shaped sleeve 641. A first magnetic ring 642 is also sleeve-like and fixedly connected to the inner wall of the arc-shaped sleeve 641. The inner cavities of the first rubber sleeves 61 are slidably connected to second magnetic rings 644, respectively.
[0027] The second magnetic ring 644 has a number of hexagonal holes 645 around one side thereof. The purpose of this arrangement is to promote air circulation. An auxiliary sliding sleeve 646 is fixedly installed on the outer wall of the second magnetic ring 644. The purpose of this arrangement is to reduce frictional interference. The outer wall of the auxiliary sliding sleeve 646 is slidably connected to the outer wall of the inner cavity of the first rubber sleeve 61.
[0028] A protective part 65 is provided on the outer wall of the second magnetic ring 644. The protective part 65 includes a plurality of connecting rods 651 fixedly connected around the outer wall of the second magnetic ring 644. One end of the connecting rods 651 passes through the auxiliary sliding sleeve 646 and extends to the outside of the auxiliary sliding sleeve 646. Several strip holes 652 are provided around the outer wall of the first rubber sleeve 61. The purpose of this arrangement is to limit the movement trajectory of the connecting rods 651.
[0029] The outer wall of the connecting rod 651 is slidably connected to the inner wall of the strip hole 652. The connecting rod 651 is fixedly connected to the annular plate 653 on the side opposite the second magnetic ring 644. Several cleaning cotton blocks 654 are fixedly connected around the inner wall of the annular plate 653. The purpose of this arrangement is to clean sweat residue from the hands. Several reinforcing rods 655 are fixedly connected to the top of one side of the annular plate 653.
[0030] During use, when a person exercises and places their hand on the outside of the first rubber sleeve 61 and grips it, the gripping force compresses the second rubber sleeve 62, causing the second rubber sleeve 62 to deform and allowing the air flow inside to move. The air flow pushes the two arc-shaped sleeves 641 outward, which drives the first magnetic ring 642 to move. The magnetic force of the first magnetic ring 642 drives the second magnetic ring 644 to move, which drives the auxiliary sliding sleeve 646 to move. The second magnetic ring 644 drives the connecting rod 651 to move, the connecting rod 651 drives the annular plate 653 to move, the annular plate 653 drives the cleaning cotton block 654 to move, the annular plate 653 drives the reinforcing rod 655 to move, and the reinforcing rod 655 is aligned with the round hole 4 provided in the disk 3, thereby improving the stabilization effect of the entire device, reducing shaking during suspension, and preventing damage to the device.
[0031] At the same time, excessive movement during the suspension process causes the horizontal bar 1 to swing. The clamping force generated by the tilting of the horizontal bar causes the curved bar 551 to move up and down. The up and down movement of the curved bar 551 drives the rotating bar 552, which in turn moves the fixed ring 553. This enhances the stabilization effect of the multiple fixed rings 553 and prevents damage to the device due to violent movement. The movement of the fixed ring 553 compresses the lifting plate 542, which in turn compresses the lifting plate 542 and moves the pushing plate 545. The pushing plate 545 presses against the annular bag 52, and the provided return spring 543 allows the pushing plate 545 to press against the annular bag 52 during movement. When the annular bag 52 is compressed, air flows through the curved pipe 53 into the first rubber sleeve 61 and is exhausted through the multiple air vents provided in the first rubber sleeve 61. This reduces sweating of the hands during exercise, and in cooperation with the first rubber sleeve 61, improves the anti-slip effect, thereby enhancing personal safety and protection.
[0032] When exercise ends, the inside of the first rubber sleeve 61 is no longer compressed, and the air pressure returns to normal. At the same time, the auxiliary spring 643 rebounds, causing the arc-shaped sleeve 641 to move in the opposite direction. The elastic effect of the auxiliary spring 643 allows the protective part 65 to move repeatedly, and the arrangement of the auxiliary sliding sleeve 646 and the cleaning cotton block 654 allows the inner and outer surfaces of the first rubber sleeve 61 to be repeatedly cleaned. This reduces the adhesion of sweat to the first rubber sleeve 61, preventing odors and stickiness caused by long-term sweat accumulation, and improving the aesthetic appearance of the device.
[0033] The above description of the embodiments is only used to help understand the method of the present invention and its core concept. It should be pointed out that those skilled in the art can make some improvements and modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention. [Explanation of symbols]
[0034] 1 support, 2 iron rod, 3 disk, 4 round hole, 5 vibration damping reinforcement mechanism, 6 cleaning protection mechanism, 51 hexagonal shell, 52 annular bag, 53 curved pipe, 54 extrusion part, 55 reinforcement part, 61 first rubber sleeve, 62 second rubber sleeve, 63 ventilation hole, 64 cleaning part, 65 protection part, 541 partition wall, 542 lifting plate, 543 return spring, 544 vertical rod, 545 extrusion plate, 551 curved rod, 552 rotating rod, 553 fixing ring, 641 arc-shaped sleeve, 642 first magnetic ring, 643 auxiliary spring, 644 second magnetic ring, 645 hexagonal hole, 646 auxiliary slide sleeve, 651 connecting rod, 652 strip hole, 653 annular plate, 654 cleaning cotton block, 655 reinforcement rod, 56 Slide hole.
Claims
1. A strength training device for physical exercise, comprising: The apparatus includes a steel bar support (1), a vibration damping reinforcement mechanism (5), and a cleaning protection mechanism (6), Two support pillars (1) are installed, one iron bar (2) is fixedly connected between the tops of the two support pillars (1), a disk (3) is fixedly connected to the top of the support pillar (1) on the side away from the iron bar (2), and a plurality of round holes (4) are provided at the top of one side of the disk (3); The vibration-damping reinforcement mechanism (5) comprises a hexagonal shell (51) fixed in a sleeve-like manner to the lower end of the outer wall of the support (1), a plurality of slide holes (56) are provided around the periphery of the outer wall of the hexagonal shell (51), a ring-shaped bag (52) is installed and fixedly connected to one end of the outer wall of the support (1) close to the hexagonal shell (51), both ends of the top of the ring-shaped bag (52) are connected to curved pipes (53), and an extrusion part (54) is provided on the inner wall of the hexagonal shell (51); The cleaning and protection mechanism (6) comprises a first rubber sleeve (61) connected to one end of the curved pipe (53), the first rubber sleeve (61) being formed hollow, a second rubber sleeve (62) being fixedly connected to the inner wall of the first rubber sleeve (61), the second rubber sleeve (62) being hollow, the inner wall of the second rubber sleeve (62) being fixed in a sleeve-like shape to the outer wall of the iron bar (2), a plurality of ventilation holes (63) being provided around the outer wall of the first rubber sleeve (61), and a cleaning part (64) being provided in the internal cavity of the second rubber sleeve (62). A strength training device for physical exercise characterized by:
2. The extrusion part (54) includes a plurality of partitions (541) fixedly connected to the periphery of the bottom of the inner wall of the hexagonal shell (51), and a lift plate (542) slidably connected between two of the partitions (541); The bottom ends of the lifting plate (542) are fixedly connected to return springs (543), and the bottoms of the return springs (543) are fixedly connected to the bottoms of the inner walls of the hexagonal shell (51).
2. A strength training device for physical exercise according to claim 1.
3. 3. The muscle training device for physical exercise according to claim 2, wherein a vertical rod (544) is fixedly connected to the upper center of the lifting plate (542), one end of the vertical rod (544) remote from the lifting plate (542) penetrates the hexagonal shell (51) and extends outside the hexagonal shell (51), and a top of the vertical rod (544) is fixedly connected to a push-out plate (545).
4. 4. The muscle training device for physical exercise according to claim 3, characterized in that a reinforcing part (55) is provided on the inner wall of the slide hole (56), the reinforcing part (55) has a curved bar (551) slidably connected to the lower end of the inner wall of the slide hole (56), and a rotating bar (552) passes through each end of one side of the curved bar (551) and is rotatably connected thereto.
5. 5. The muscle training device for physical exercise according to claim 4, wherein fixed rings (553) are installed and fixedly connected to the outer walls of both ends of the rotating rod (552), and the outer surface of the fixed ring (553) located at the top is slidably connected to the inner wall of the hexagonal shell (51) and is in contact with each other.
6. The cleaning component (64) includes arc-shaped sleeves (641) slidably connected to both ends of the inner wall of the second rubber sleeve (62), 6. The muscle training device for physical exercise according to claim 5, characterized in that a plurality of auxiliary springs (643) are fixedly connected around one end of the arc-shaped sleeve (641), a first magnetic ring (642) is installed on and fixedly connected to the inner wall of the arc-shaped sleeve (641), and a second magnetic ring (644) is slidably connected to the inner walls of both ends of the inner cavity of the first rubber sleeve (61).
7. 7. The muscle training device for physical exercise according to claim 6, characterized in that a plurality of hexagonal holes (645) are provided around one side of the second magnetic ring (644), an auxiliary sliding sleeve (646) is installed and fixedly connected to the outer wall of the second magnetic ring (644), and the outer wall of the auxiliary sliding sleeve (646) is slidably connected to the outer wall of the inner cavity of the first rubber sleeve (61).
8. A protective part (65) is provided on the outer wall of the second magnetic ring (644), 8. The strength training device for physical exercise according to claim 7, characterized in that the protective part (65) includes a plurality of connecting rods (651) fixedly connected to the periphery of the outer wall of the second magnetic ring (644), one end of the connecting rods (651) extending through the auxiliary sliding sleeve (646) to the outside of the auxiliary sliding sleeve (646), and a plurality of strip holes (652) are provided around the periphery of the outer wall of the first rubber sleeve (61).
9. 9. The muscle training device for physical exercise described in claim 8, characterized in that the outer wall of the connecting rod (651) is slidably connected to the inner wall of the strip hole (652), the end of the connecting rod (651) away from the second magnetic ring (644) is fixedly connected to an annular plate (653), a plurality of cleaning cotton blocks (654) are fixedly connected around the inner wall of the annular plate (653), and a plurality of reinforcing rods (655) are fixedly connected to the top of one side of the annular plate (653).
Citation Information
Patent Citations
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