Supporting device and method for knee arthroscopic surgery

Abstract

The invention relates to the technical field of medical instruments, in particular to a supporting device and a supporting method.The supporting device comprises a bottom plate, a first supporting column is arranged on one side of the upper surface of the bottom plate, a second supporting column is arranged on the other side of the upper surface of the bottom plate, and locking assemblies are arranged at the top ends of the first supporting column and the second supporting column; a massage assembly is arranged in the locking assembly, and an adjusting assembly is arranged in the second supporting column. Compared with the prior art, the locking assembly is arranged, a worm is rotated to drive a worm gear to rotate, a bidirectional threaded rod is driven to rotate, sliding bases at the two ends are made to get close to the middle, an arc-shaped plate is driven to get close, a straight gear is meshed with a rack to make the arc-shaped plate rotate, thighs of a patient are covered and clamped, and the purpose of locking and fixing the legs of the patient is achieved; the stability of the legs of the patient in the operation process is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a supporting device and a supporting method for knee arthroscopy surgery. Background Art

[0002] Knee arthroscopy involves inserting a lens metal tube with a lighting device into the joint cavity through a very small incision, and magnifying the internal structure of the joint cavity on a monitor to observe the condition and location of the lesions in the joint cavity. At the same time, a comprehensive inspection and cleaning of the diseased area is performed under television monitoring. During the operation, a support device is required to support the patient's legs to facilitate the doctor's operation.

[0003] In the prior art, a Chinese patent document with publication number CN220833529U proposes a support device for lower limbs in knee arthroscopy surgery, comprising a bottom plate, three circular sockets are provided on the bottom plate, a side plate is fixedly mounted on the side of the bottom plate, three special-shaped sockets are provided on the side plate, and the special-shaped sockets are connected to the foot support roller through special-shaped plugs. A locking mechanism is provided on the upper end wall of the side plate, and a locking rod can penetrate and lock the special-shaped socket and the special-shaped plug at the same time, and the process of loosening and tightening the conventional fixer is not required. The use process is simple and quick, there is no special requirement for the operating bed, and no additional track is required to be provided outside the bed, which saves costs, but During knee arthroscopy, the patient may feel nervous, anxious, and other emotions before the operation, or due to the touch of surgical instruments, ambient temperature, and other factors, certain stimuli may cause slight muscle tremors or contractions, which manifests as unconscious micro-movements of the legs. The support device has a poor limiting effect on the patient's legs, and the patient's unconscious shaking can easily cause the instrument to accidentally injure originally healthy tissues, and may also cause incision ruptures, increasing the risk of postoperative infection and poor healing. Therefore, the present application provides a support device and a support method for knee arthroscopy to meet the needs of supporting the patient's legs while playing a certain limiting role. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a support device and a support method for knee arthroscopy surgery to solve the problem that the leg support device has a poor leg limiting effect.

[0005] Based on the above purpose, the present invention provides a support device for knee arthroscopy surgery, comprising a base plate, a first support column is arranged on one side of the upper surface of the base plate, a second support column is arranged on the other side of the upper surface of the base plate, a locking component is arranged at the top of each of the first support column and the second support column, a massage component is arranged inside the locking component, and an adjustment component is arranged inside the second support column;

[0006] The second pillar is connected to the locking assembly at the top through an adjusting assembly, and the adjusting assembly has the effect of adjusting the angle between the locking assembly and the second pillar.

[0007] Preferably, the locking assembly includes a support plate fixedly connected to the top end of the first support column. A chute is formed on the upper surface of the support plate. A sliding seat is slidably connected inside the chute. An arc-shaped plate is rotatably connected to the side of the sliding seat. A sponge is fixedly connected to the inner side of the arc-shaped plate.

[0008] Preferably, a worm is movably inserted through the side of the support plate. A bidirectional threaded rod is rotatably connected to the inner wall of the chute. A worm gear is fixedly sleeved in the middle of the outer surface of the bidirectional threaded rod. The worm gear is meshed and connected with the worm. The sliding seat is threadedly connected to the outer surface of the bidirectional threaded rod.

[0009] Preferably, a spur gear is fixedly sleeved at the connection between the arc-shaped plate and the sliding seat. A rack is embedded in the upper surface of the support plate. The spur gear is meshed and connected with the rack.

[0010] Preferably, the massage assembly includes a side groove formed through the side of the arc-shaped plate. A push rod is limited and slidably connected inside the side groove. One end of the push rod extending into the arc-shaped plate is fixedly connected with an inner plate. A round rod is rotatably connected to the surface of the inner plate. A massage ball is arranged at one end of the round rod extending out of the arc-shaped plate.

[0011] Preferably, a toothed ring is arranged inside the arc-shaped plate. A bevel gear is fixedly sleeved on the outer surface of the round rod. The bevel gear is meshed and connected with the toothed ring.

[0012] Preferably, the adjusting assembly includes a bracket fixedly connected to the top end of the second support column. A half gear is rotatably connected inside the bracket. The upper surface of the half gear is fixedly connected with the lower surface of the support plate. A lock block is slidably connected inside the second support column. The lock block is clamped at the lower part of the half gear.

[0013] Preferably, a shaft rod is movably inserted through the second support column. An eccentric wheel is fixedly sleeved on the outer surface of the shaft rod. The outer surface of the eccentric wheel abuts against the lower surface of the lock block. One end of the shaft rod extending out of the second support column is movably inserted through a strip-shaped rod. A turntable is fixedly connected to the end of the strip-shaped rod. A spring is arranged inside the shaft rod. The spring is fixedly connected with the strip-shaped rod.

[0014] Preferably, a positioning rod is fixedly connected to the outer surface of the turntable. A positioning hole is formed on the outer surface of the second support column. The positioning rod is clamped inside the positioning hole.

[0015] A support method, using the support device for knee arthroscopic surgery described above, the support method is as follows:

[0016] S1. Preoperative preparation: Place the device at a suitable position on the patient's leg on the operating table. Place the patient's leg to be operated on on the first support column and the second support column, so that the knee is located between the two support columns;

[0017] S2. Clamping and locking: Rotate the worm to drive two arc-shaped plates to lock and fix the patient's leg, ensuring the stability of the patient's leg during the operation.

[0018] S3. Angle adjustment: Adjust the rotation angle of the semi-gear to adjust the deflection angle of the locking component on the second support column, and then use the eccentric wheel to push the lock block to lock the semi-gear.

[0019] S4. Intraoperative massage: Push the push rod to slide along the side groove. Under the action of the bevel gear and the toothed ring, the massage ball will rotate during the sliding process, thereby massaging the patient's leg.

[0020] Advantages of the present invention:

[0021] 1. For this kind of support device and support method for arthroscopic knee surgery, by setting the locking component, rotating the worm to drive the worm gear to rotate, driving the bidirectional threaded rod to rotate, making the two end sliding seats approach the middle, driving the arc-shaped plates to approach, and using the meshing of the spur gear and the rack to make the arc-shaped plates rotate to cover and clamp the patient's thigh, achieving the purpose of locking and fixing the patient's leg and ensuring the stability of the patient's leg during the operation.

[0022] 2. For this kind of support device and support method for arthroscopic knee surgery, by setting the massage component, pushing the push rod to slide along the side groove, the massage ball moves accordingly to massage the patient's leg. Under the action of the bevel gear and the toothed ring, the massage ball will rotate during the sliding process, improving the massage effect.

[0023] 3. For this kind of support device and support method for arthroscopic knee surgery, by setting the adjustment component, rotating the turntable to make the eccentric wheel move downward. At this time, the locking component on the second support column can be rotated to the appropriate angle according to the needs, and then reverse-rotate the turntable to make the eccentric wheel push the lock block upward again to lock the semi-gear, achieving the purpose of adjusting the deflection angle of the locking component on the second support column and improving the flexibility of the device. Description of the drawings

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only those of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a three-dimensional structure schematic diagram of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the locking component of the present invention;

[0027] Figure 3 Schematic diagram of the partial cross-section structure of the locking component of the present invention;

[0028] Figure 4 Schematic diagram of the massage component structure of the present invention;

[0029] Figure 5 Schematic diagram of the internal connection structure of the present invention;

[0030] Figure 6 Schematic diagram of the adjustment component structure of the present invention;

[0031] Figure 7 Schematic diagram of the internal structure of the second support column of the present invention.

[0032] The markings in the figure are:

[0033] 1. Bottom plate; 2. First support column; 3. Second support column; 4. Locking component; 401. Support plate; 402. Chute; 403. Slide seat; 404. Arc plate; 405. Sponge; 406. Worm; 407. Bidirectional threaded rod; 408. Worm gear; 409. Straight gear; 410. Rack; 5. Massage component; 501. Side groove; 502. Push rod; 503. Inner plate; 504. Round rod; 505. Bevel gear; 506. Massage ball; 507. Tooth ring; 6. Adjustment component; 601. Bracket; 602. Half gear; 603. Shaft rod; 604. Eccentric wheel; 605. Lock block; 606. Turntable; 607. Strip rod; 608. Spring; 609. Positioning rod; 610. Positioning hole. Detailed implementation manners

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with specific embodiments.

[0035] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0036] AsFigures 1 to 7 As shown, a support device and support method for arthroscopic knee surgery include a bottom plate 1. On one side of the upper surface of the bottom plate 1, a first support column 2 is provided. On the other side of the upper surface of the bottom plate 1, a second support column 3 is provided. Locking components 4 are provided at the tops of both the first support column 2 and the second support column 3. A massage component 5 is provided inside the locking component 4. An adjustment component 6 is provided inside the second support column 3. The second support column 3 is connected to the locking component 4 at the top through the adjustment component 6, and the adjustment component 6 has the effect of adjusting the included angle between the locking component 4 and the second support column 3;

[0037] Place the device on the operating table at a suitable position on the patient's leg. Place the leg of the patient that needs surgery on the first support column 2 and the second support column 3. Use the locking component 4 to lock and clamp the patient's leg, ensuring the stability of the patient's leg during the surgery. Adjust the deflection angle of the locking component 4 on the second support column 3 through the adjustment component 6 according to the needs, improving the flexibility of the device. Use the massage component 5 to massage the patient's leg.

[0038] As Figure 2 and Figure 3 shown, the locking component 4 includes a support plate 401 fixedly connected to the top of the first support column 2. A chute 402 is opened on the upper surface of the support plate 401. A sliding seat 403 is slidably connected inside the chute 402. An arc-shaped plate 404 is rotatably connected to the side of the sliding seat 403. A sponge 405 is fixedly connected to the inner side of the arc-shaped plate 404. A worm 406 is movably inserted through the side of the support plate 401. A bidirectional threaded rod 407 is rotatably connected to the inner wall of the chute 402. A worm gear 408 is fixedly sleeved in the middle of the outer surface of the bidirectional threaded rod 407. The worm gear 408 is meshed with the worm 406. The sliding seat 403 is threadedly connected to the outer surface of the bidirectional threaded rod 407. A spur gear 409 is fixedly sleeved at the connection between the arc-shaped plate 404 and the sliding seat 403. A rack 410 is embedded in the upper surface of the support plate 401. The spur gear 409 is meshed with the rack 410;

[0039] Rotate the worm 406 to drive the worm gear 408 to rotate. While the worm gear 408 rotates, it drives the bidirectional threaded rod 407 to rotate. Furthermore, during the rotation of the bidirectional threaded rod 407, it will drive the sliding seats 403 at both ends to approach the middle, and then drive the arc-shaped plates 404 to approach the middle. During the movement of the arc-shaped plates 404, the spur gear 409 meshes with the rack 410, and then drives the arc-shaped plates 404 to rotate and cover and clamp the patient's thigh. The sponge 405 inside the arc-shaped plate 404 can prevent the skin from being scratched during the locking of the arc-shaped plate 404, achieving the purpose of locking and fixing the patient's leg, ensuring the stability of the patient's leg during the surgery, and avoiding the influence of unconscious movements on the surgery.

[0040] As Figure 4 and Figure 5As shown, the massage component 5 includes a side groove 501 penetrating through the side of the arc plate 404. A push rod 502 is connected in the side groove 501 in a limited sliding manner. One end of the push rod 502 extending into the arc plate 404 is fixedly connected with an inner plate 503. A round rod 504 is rotatably connected to the surface of the inner plate 503. One end of the round rod 504 extending out of the arc plate 404 is provided with a massage ball 506. A toothed ring 507 is arranged inside the arc plate 404. A bevel gear 505 is fixedly sleeved on the outer surface of the round rod 504. The bevel gear 505 is meshed and connected with the toothed ring 507;

[0041] Push the push rod 502 to slide along the side groove 501. The push rod 502 drives the inner plate 503 to move, and the massage ball 506 moves accordingly to massage the patient's leg, ensuring the blood circulation of the patient's leg. While the inner plate 503 moves, the bevel gear 505 rotates under the action of the toothed ring 507, and then drives the round rod 504 and the massage ball 506 to rotate, so that the massage ball 506 adds a self-rotation movement during the moving process, improving the massage effect.

[0042] As Figure 6 and Figure 7 As shown, the adjusting component 6 includes a bracket 601 fixedly connected to the top of the second support column 3. A semi-gear 602 is rotatably connected inside the bracket 601. The upper surface of the semi-gear 602 is fixedly connected to the lower surface of the support plate 401. A lock block 605 is slidably connected inside the second support column 3. The lock block 605 is clamped to the lower part of the semi-gear 602. A shaft rod 603 is movably inserted through the second support column 3. An eccentric wheel 604 is fixedly sleeved on the outer surface of the shaft rod 603. The outer surface of the eccentric wheel 604 abuts against the lower surface of the lock block 605. One end of the shaft rod 603 extending out of the second support column 3 is movably inserted through a strip-shaped rod 607. One end of the strip-shaped rod 607 is fixedly connected with a turntable 606. A spring 608 is arranged inside the shaft rod 603. The spring 608 is fixedly connected with the strip-shaped rod 607. A positioning rod 609 is fixedly connected to the outer surface of the turntable 606. A positioning hole 610 is opened on the outer surface of the second support column 3. The positioning rod 609 is clamped inside the positioning hole 610;

[0043] Rotate the turntable 606 to drive the shaft rod 603 to rotate. During the rotation of the shaft rod 603, the eccentric wheel 604 is driven to rotate. When the eccentric wheel 604 moves downward, the lock block 605 automatically slides down and loses the positioning function for the semi-gear 602. At this time, the medical staff rotates the locking component 4 on the second support column 3 according to the needs. After reaching the appropriate angle, rotate the turntable 606 in the reverse direction. The eccentric wheel 604 pushes the lock block 605 to move upward again to lock the semi-gear 602. Finally, under the action of the spring 608, the strip-shaped rod 607 is driven to move, and the positioning rod 609 is clamped in the positioning groove again, achieving the purpose of adjusting the deflection angle of the locking component 4 on the second support column 3, so that the patient's calf can rotate accordingly, and then the knee rotation adjustment can be ensured under the condition of locking according to the needs, improving the flexibility of the device.

[0044] A supporting method, using the supporting device for arthroscopic knee surgery described above, the supporting method is as follows:

[0045] S1. Preoperative preparation: Place the device at a suitable position on the patient's leg on the operating table, and place the leg of the patient to be operated on on the first support column 2 and the second support column 3, so that the knee is located between the two support columns;

[0046] S2. Clamping and locking: Drive the two arc-shaped plates 404 to lock and fix the patient's leg by rotating the worm 406, ensuring the stability of the patient's leg during the operation;

[0047] S3. Angle adjustment: Adjust the deflection angle of the locking component 4 on the second support column 3 by adjusting the rotation angle of the semi-gear 602, and then use the eccentric wheel 604 to push the lock block 605 to lock the semi-gear 602;

[0048] S4. Intraoperative massage: By pushing the push rod 502 to slide along the side groove 501, under the action of the bevel gear 505 and the toothed ring 507, the massage ball 506 will rotate during the sliding process, thereby massaging the patient's leg.

[0049] For the technical solution provided by the present invention, when performing arthroscopic knee surgery on a patient, place the device on the operating table at a suitable position on the patient's leg, place the leg of the patient to be operated on on the first support column 2 and the second support column 3, so that the knee is located between the two support columns. Then rotate the worm 406 to drive the worm gear 408 to rotate. While the worm gear 408 rotates, it drives the bidirectional threaded rod 407 to rotate. Since the sliding seats 403 are placed at both ends of the bidirectional threaded rod 407, during the rotation of the bidirectional threaded rod 407, it will drive the sliding seats 403 at both ends to approach the middle, and then drive the arc-shaped plates 404 to approach each other. During the movement of the arc-shaped plates 404, the spur gear 409 meshes with the rack 410, and then drives the arc-shaped plates 404 to rotate and cover and clamp the patient's thigh. The sponge 405 in the arc-shaped plate 404 can prevent the skin from being scratched during the locking process of the arc-shaped plate 404, achieving the purpose of locking and fixing the patient's leg, ensuring the stability of the patient's leg during the operation, and avoiding the influence of unconscious movements on the operation;

[0050] Next, control the adjustment component 6 according to the needs of the operation. Specifically, pull the turntable 606 outwards until the positioning rod 609 slides out of the positioning hole 610, and then rotate the turntable 606 to drive the shaft rod 603 to rotate. During the rotation of the shaft rod 603, the eccentric wheel 604 is driven to rotate. As the eccentric wheel 604 moves downward, the locking block 605 automatically slides down and loses its positioning effect on the half gear 602. At this time, the medical staff rotates the locking component 4 on the second support column 3 according to the needs. After reaching the appropriate angle, rotate the turntable 606 in the reverse direction. The eccentric wheel 604 pushes the locking block 605 upwards again to lock the half gear 602. Finally, under the action of the spring 608, the strip-shaped rod 607 is driven to move, and the positioning rod 609 is re-engaged in the positioning groove, achieving the purpose of adjusting the deflection angle of the locking component 4 on the second support column 3, enabling the patient's calf to rotate accordingly, and further enabling the knee joint to be adjusted while ensuring locking according to the needs, improving the flexibility of the device. During the operation, the medical staff can push the push rod 502 to slide along the side groove 501. The push rod 502 drives the inner plate 503 to move, and the massage ball 506 moves accordingly to massage the patient's leg to ensure blood circulation in the patient's leg. While the inner plate 503 is moving, the bevel gear 505 rotates under the action of the toothed ring 507, and then drives the round rod 504 and the massage ball 506 to rotate, so that the massage ball 506 adds a self-rotation movement during the movement process, improving the massage effect.

[0051] Those of ordinary skill in the art should understand that the discussion of any embodiment above is only exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0052] The present invention aims to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A support device for knee arthroscopy surgery, characterized in that: include: A base plate (1), wherein a first support column (2) is arranged on one side of the upper surface of the base plate (1), and a second support column (3) is arranged on the other side of the upper surface of the base plate (1); a locking component (4) is arranged at the top of each of the first support column (2) and the second support column (3); a massage component (5) is arranged inside the locking component (4); and an adjustment component (6) is arranged inside the second support column (3); The second pillar (3) is connected to the locking component (4) at the top through an adjusting component (6), and the adjusting component (6) has the effect of adjusting the angle between the locking component (4) and the second pillar (3).

2. The support device for knee arthroscopy according to claim 1, characterized in that: The locking assembly (4) comprises a support plate (401) fixedly connected to the top end of the first pillar (2); a slide groove (402) is provided on the upper surface of the support plate (401); a slide seat (403) is slidably connected inside the slide groove (402); a side edge of the slide seat (403) is rotatably connected to an arc plate (404); and a sponge (405) is fixedly connected to the inner side of the arc plate (404).

3. The support device for knee arthroscopy according to claim 2, characterized in that: A worm (406) is movably inserted into the side of the support plate (401), and a bidirectional threaded rod (407) is rotatably connected to the inner wall of the slide groove (402). A worm wheel (408) is fixedly sleeved in the middle of the outer surface of the bidirectional threaded rod (407), and the worm wheel (408) is meshingly connected to the worm (406). The slide seat (403) is threadedly connected to the outer surface of the bidirectional threaded rod (407).

4. The support device for knee arthroscopy according to claim 3, characterized in that: A spur gear (409) is fixedly sleeved at the connection between the arc plate (404) and the slide seat (403), a rack (410) is embedded in the upper surface of the support plate (401), and the spur gear (409) is meshingly connected with the rack (410).

5. The support device for knee arthroscopy according to claim 4, characterized in that: The massage component (5) comprises a side groove (501) extending through the side of the arc-shaped plate (404); a push rod (502) is slidably connected to the inside of the side groove (501); one end of the push rod (502) extending into the arc-shaped plate (404) is fixedly connected to an inner plate (503); a round rod (504) is rotatably connected to the surface of the inner plate (503); and a massage ball (506) is provided at one end of the round rod (504) extending out of the arc-shaped plate (404).

6. The support device for knee arthroscopy surgery according to claim 5, characterized in that: A gear ring (507) is arranged inside the arc plate (404), and a bevel gear (505) is fixedly sleeved on the outer surface of the round rod (504), and the bevel gear (505) is meshingly connected with the gear ring (507).

7. The support device for knee arthroscopy surgery according to claim 6, characterized in that: The adjustment assembly (6) comprises a bracket (601) fixedly connected to the top of the second pillar (3); a half gear (602) is rotatably connected inside the bracket (601); the upper surface of the half gear (602) is fixedly connected to the lower surface of the support plate (401); a locking block (605) is slidably connected inside the second pillar (3); and the locking block (605) is clamped on the lower part of the half gear (602).

8. The support device for knee arthroscopy according to claim 7, characterized in that: A shaft (603) is movably inserted into the interior of the second pillar (3); an eccentric wheel (604) is fixedly sleeved on the outer surface of the shaft (603); the outer surface of the eccentric wheel (604) abuts against the lower surface of the locking block (605); one end of the shaft (603) extending out of the second pillar (3) is movably inserted into a strip rod (607); the end of the strip rod (607) is fixedly connected to a rotating disk (606); a spring (608) is arranged inside the shaft (603); and the spring (608) is fixedly connected to the strip rod (607).

9. The support device for knee arthroscopy surgery according to claim 8, characterized in that: A positioning rod (609) is fixedly connected to the outer surface of the rotating disk (606), a positioning hole (610) is opened on the outer surface of the second support (3), and the positioning rod (609) is clamped inside the positioning hole (610).

10. A supporting method, using the supporting device for knee arthroscopy surgery as claimed in claim 9, the supporting method being as follows: S1. Preoperative preparation: Place the device at a suitable position on the patient's leg on the operating table, and place the patient's leg that needs surgery on the first support (2) and the second support (3), so that the knee is located between the two supports; S2, clamping and locking: the two arc-shaped plates (404) are driven to lock and fix the patient's legs by rotating the worm (406), thereby ensuring the stability of the patient's legs during the operation; S3, angle adjustment: the deflection angle of the locking assembly (4) on the second support (3) is adjusted by adjusting the rotation angle of the half gear (602), and then the eccentric wheel (604) is used to push the locking block (605) to lock the half gear (602); S4, intraoperative massage: by pushing the push rod (502) to slide along the side groove (501), under the action of the bevel gear (505) and the gear ring (507), the massage ball (506) will rotate during the sliding process, thereby massaging the patient's legs.

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