A collapsible seat massage mechanism

Abstract

The application discloses a collapsible seat massage mechanism, which is effective in facilitating the quick retraction of the massage mechanism when the passenger is impacted, comprising a rotatable shell, the upper side of the shell being provided with a rotatable power sleeve, a massage rod being slidably sleeved in the power sleeve, and a lifting mechanism being arranged between the massage rod and the power sleeve; the upper side of the massage rod being provided with a massage base, a massage head being detachably connected to the upper side of the massage base, a limiting mechanism being arranged between the massage base and the massage rod, and a collapsing mechanism being arranged on the lower side of the massage base, the application has novel structure, ingenious design and simple and convenient operation, effectively facilitates the massage on the passenger, realizes better massage power transmission effect, can perform massage with different intensity, realizes the effect of automatic retraction after being pressed, realizes better back massage effect, and reduces the injury of the passenger.

Description

Technical Field

[0001] This invention belongs to the technical field of automotive seat massage mechanisms, and relates to a collapsible seat massage mechanism. Background Technology

[0002] With the development of the automotive industry and the increasing demands of consumers for driving and riding comfort, car seats with massage functions have become increasingly popular. Among existing car seat massage technologies, a common type is the pneumatic massage system, which uses an air pump and air tubes to inflate and deflate airbags to achieve massage movements. This type of solution has limitations such as relatively weak massage intensity, limited mode selection, and imprecise motion feedback, resulting in a relatively insufficient overall comfort and variety of the massage experience.

[0003] The more mainstream solution currently is to use a motor-driven mechanical massage mechanism, usually integrated inside the seat back. Driven by a motor, the massage heads perform actions such as up-and-down movement, rotation, and kneading, providing richer massage modes and stronger pressure, thus enhancing the seating experience. However, existing massage mechanism designs focus primarily on achieving massage functionality and improving comfort, with insufficient consideration given to safety in emergency situations such as vehicle collisions.

[0004] During vehicle operation, in the event of a collision such as a rear-end collision, the occupant's body will experience a "whipping effect" due to the immense inertial force, causing the head and upper body to move rapidly backward and violently press against the seat back. If the massage heads protruding from the backrest cannot avoid this impact in time, they will become a hard fulcrum, causing severe compression and impact on the occupant's back and spine, potentially leading to or exacerbating secondary injuries. Some current technical solutions attempt to mitigate the impact by having the massage heads retract under significant pressure, but these typically only achieve a simple linear retraction, and the retraction response may be delayed. This design also presents a critical problem: during normal massage, the massage heads and massage drive components are usually fixedly connected or rotate in tandem. When a collision occurs, if the massage drive components remain linked to the rotation of the massage heads while retracting, the massage heads will rotate relative to the occupant's back. This rotation not only fails to effectively disperse the impact force but may also cause additional shearing and torsional injuries to the soft tissues of the occupant's back, contradicting the original intention of safety design.

[0005] Therefore, there is an urgent need in this field for a new type of car seat massage mechanism that can overcome the shortcomings of pneumatic massage in terms of intensity and modes, and provide better comfort. At the same time, it must be able to respond quickly and intelligently when a vehicle collision occurs and the occupant's body is violently pressed backward. This requires not only that the massage drive component can retract quickly and with almost zero delay to provide avoidance space, but more importantly, it must ensure that the massage head itself can instantly disengage from the rotational linkage with the drive component and remain stationary relative to the occupant's back, that is, it does not rotate relative to the occupant. In this way, while achieving rich massage functions, it can minimize the potential risk of injury to the occupant in a collision.

[0006] Therefore, a collapsible massage chair mechanism is needed to solve the above problems. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes a collapsible chair massage mechanism, which effectively solves the problems in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A collapsible seat massage mechanism includes a rotatable housing, a rotatable power sleeve on the upper side of the housing, a massage rod slidably fitted inside the power sleeve, a lifting mechanism between the massage rod and the power sleeve, the power sleeve driving the massage rod to rise and fall and rotate the massage rod at its highest and lowest positions via the lifting mechanism; a massage base is provided on the upper side of the massage rod, a massage head is detachably connected to the upper side of the massage base, a limiting mechanism is provided between the massage base and the massage rod to limit the rotation of the massage base relative to the massage rod, and a collapsible mechanism is provided on the lower side of the massage base to disengage the limiting mechanism.

[0010] Preferably, the housing contains a motor, and the output end of the motor is provided with a reduction mechanism, the output end of which is coaxially and fixedly connected to the power sleeve.

[0011] Preferably, the reduction mechanism includes a worm gear fixedly connected to the motor output shaft, a worm wheel fitted on one side of the worm gear, a pinion gear fixedly connected coaxially to the upper side of the worm wheel, a large gear meshing on one side of the pinion gear, and a power sleeve fixedly connected coaxially to the upper side of the large gear.

[0012] Preferably, the housing has a lifting groove inside, and the lower end of the massage rod is fixedly connected to a limiting piece that matches the lifting groove. The limiting piece and the lifting groove cooperate to form a structure in which the massage rod moves up and down relative to the housing.

[0013] Preferably, the lifting mechanism includes a power block fixedly connected to the power sleeve, the power block being fixedly connected to the inner wall of the power sleeve, a spiral groove being provided on the outer side of the massage rod, the power block being slidably connected inside the spiral groove, and a damping limiting component for rotating and limiting the massage rod being fixedly connected to the upper side of the housing.

[0014] Preferably, the damping limiting assembly includes a rotary damper, and two vertical limiting blocks are fixedly connected to the inner wall of the rotating end of the rotary damper. The outer side of the massage rod is provided with vertical limiting grooves that correspond one-to-one with the vertical limiting blocks. The vertical limiting blocks and the vertical limiting grooves cooperate with each other to form a structure that limits the rotation of the massage rod relative to the housing.

[0015] Preferably, the limiting mechanism includes a mounting block fixedly connected to the upper end of the massage rod, a rotation limiting block fixedly connected to the upper side of the mounting block, and a rotation limiting groove adapted to the rotation limiting block is opened inside the massage base. The rotation limiting block and the rotation limiting groove cooperate with each other to form a structure that limits the rotation of the massage base relative to the massage rod.

[0016] Preferably, the collapse mechanism includes a collapse block, and a circular piece is fixedly connected to the outside of the massage rod. The upper and lower ends of the collapse block abut against the massage base and the circular piece, respectively.

[0017] Preferably, the upper side of the massage head is fixedly connected with massage claws of different heights.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention has a lifting mechanism. By setting the lifting mechanism, the massage rod can be driven to rise and fall, and at the highest and lowest points of the rise and fall, the massage rod can rotate relative to the housing to achieve a good massage function.

[0020] 2. This invention has a limiting mechanism. By setting the limiting mechanism, the consistency of lifting and rotating between the massage rod, massage base, and massage head can be ensured during the normal operation of the massage mechanism, so as to achieve a good seat massage effect.

[0021] 3. The present invention has a massage base and a collapsible mechanism. By setting up a massage base and a collapsible mechanism, and connecting the massage head through the massage base, the massage head and the massage rod are not directly connected. In the event of an impact, the massage head can rotate relative to the massage rod, thereby reducing injury to the occupant. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing the usage state of the invention after installation.

[0023] Figure 2This is an exploded structural diagram of the massage head location in this invention.

[0024] Figure 3 This is a schematic diagram of the deceleration mechanism in this invention.

[0025] Figure 4 This is a schematic diagram showing the position of the limiting piece in this invention.

[0026] Figure 5 This is a schematic diagram of the spiral groove and vertical limiting block in this invention.

[0027] In the diagram: 1. Housing; 2. Power sleeve; 3. Massage rod; 4. Lifting mechanism; 5. Massage base; 6. Massage head; 7. Limiting mechanism; 9. Motor; 10. Reduction mechanism; 11. Worm gear; 12. Worm wheel; 13. Pinion; 14. Gear; 15. Lifting groove; 16. Limiting plate; 17. Power block; 18. Spiral groove; 19. Rotation damper; 20. Vertical limiting block; 21. Vertical limiting groove; 22. Mounting block; 23. Rotation limiting block; 24. Rotation limiting groove; 25. Collapse block; 26. Massage claw; 27. Circular plate. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The following is in conjunction with the appendix Figures 1 to 5 The specific embodiments of the present invention will be described in further detail below.

[0030] Depend on Figures 1 to 5 As shown, the present invention includes a rotatable housing 1, and a rotatable power sleeve 2 is provided on the upper side of the housing 1. In order to facilitate the rapid retraction of the massage mechanism when the occupant is impacted, a massage rod 3 is slidably fitted inside the power sleeve 2. A lifting mechanism 4 is provided between the massage rod 3 and the power sleeve 2. The power sleeve 2 drives the massage rod 3 to rise and fall and rotate the massage rod 3 at the highest and lowest positions through the lifting mechanism 4. A massage base 5 is provided on the upper side of the massage rod 3. A massage head 6 is detachably connected to the upper side of the massage base 5. A limiting mechanism 7 is provided between the massage base 5 and the massage rod 3 to limit the rotation of the massage base 5 relative to the massage rod 3. A collapsing mechanism is provided on the lower side of the massage base 5 to disengage the limiting mechanism 7.

[0031] It should be noted that when the massage device is in use, if the occupant is subjected to an instantaneous impact such as a rear-end collision, the head and upper body tend to move quickly towards the seat back due to inertia and whiplash effect. As a result, the occupant's body will quickly press against the massage head 6. At this time, the massage rod 3 needs to quickly retract the massage head 6 to reduce the injury caused by the compression impact on the occupant's back. Since the patient's back is in close contact with the massage head 6 at this time, the massage head 6 needs to remain stationary relative to the occupant during the retraction of the massage rod 3 and cannot rotate. For the above reasons, the limiting mechanism 7 and the collapsing mechanism are set up so that when the end of the massage head 6 is pressed beyond the threshold, the collapsing mechanism can operate quickly, thereby releasing the limiting effect of the limiting mechanism 7, allowing the massage rod 3 to rotate relative to the massage head 6 during the rapid retraction, thus keeping the massage head 6 from rotating relative to the occupant.

[0032] In use, the lifting mechanism 4 drives the massage rod 3 to rise and fall, and at the highest and lowest points, the massage rod 3 can rotate relative to the housing 1 to achieve the massage function. The limiting mechanism 7 ensures the consistency of the lifting and rotation of the massage rod 3, massage base 5, and massage head 6 during normal operation, thus achieving a good seat massage effect. By setting the massage base 5 and the collapsible mechanism, and connecting the massage head 6 through the massage base 5, the massage head 6 is not directly connected to the massage rod 3. In the event of an impact, the massage head 6 can rotate relative to the massage rod 3, thereby reducing injury to the occupant.

[0033] Furthermore, by Figures 1 to 5 As shown, in order to facilitate the massage of the occupants, a motor 9 is provided inside the housing 1, and a reduction mechanism 10 is provided at the output end of the motor 9. The output end of the reduction mechanism 10 is coaxially and fixedly connected to the power sleeve 2.

[0034] Furthermore, by Figures 1 to 5 As shown, in order to achieve a better massage power transmission effect, the reduction mechanism 10 includes a worm gear 11 fixedly connected to the output shaft of the motor 9. A worm wheel 12 is fitted on one side of the worm gear 11. A small gear 13 is coaxially fixedly connected to the upper side of the worm wheel 12. A large gear 14 meshes on one side of the small gear 13. The power sleeve 2 is coaxially fixedly connected to the upper side of the large gear 14.

[0035] It should be noted that in this embodiment, the power sleeve 2, massage rod 3, massage base 5 and massage head 6 are all set in pairs. The operation of the two massage heads 6 can be realized by a dual-head motor 9 and two sets of matching reduction mechanisms 10, which can increase the integration of the massage device. Of course, in other embodiments, a power component can also be added to realize that one motor 9 drives multiple massage heads 6 to operate, which will not be discussed in detail here.

[0036] In this embodiment, the motor 9 is a dual-head motor 9, with its two output shafts coaxially fixedly connected to the corresponding worm gear 11. The worm gear 11 drives the corresponding pinion 13 to rotate through the worm wheel 12. After secondary deceleration between the pinion 13 and the large gear 14, the large gear 14 drives the corresponding power sleeve 2 to rotate, which in turn drives the massage rod 3 to rotate through the lifting mechanism 4.

[0037] Furthermore, by Figures 1 to 5 As shown, in order to facilitate massage for the patient, a lifting groove 15 is provided inside the housing 1. A limiting piece 16 that is adapted to the lifting groove 15 is fixedly connected to the lower end of the massage rod 3. The limiting piece 16 and the lifting groove 15 cooperate with each other to form a structure in which the massage rod 3 moves up and down relative to the housing 1.

[0038] In use, by setting the lifting groove 15 and the limiting plate 16, the lifting groove 15 can limit the two extreme positions of the limiting plate 16, which makes it convenient to massage the patient with appropriate intensity and convenient for the patient to use.

[0039] Furthermore, by Figures 1 to 5 As shown, in order to perform massages of different intensities, the lifting mechanism 4 includes a power block 17 fixedly connected to the power sleeve 2. The power block 17 is fixedly connected to the inner wall of the power sleeve 2. A spiral groove 18 is provided on the outer side of the massage rod 3. The power block 17 is slidably connected inside the spiral groove 18. A damping limiting component for limiting the rotation of the massage rod 3 is fixedly connected to the upper side of the housing 1.

[0040] Furthermore, by Figures 1 to 5 As shown, in order to achieve the effect of automatic retraction after being compressed, the damping and limiting assembly includes a rotary damper 19. Two vertical limiting blocks 20 are fixedly connected to the inner side wall of the rotating end of the rotary damper 19. The outer side of the massage rod 3 is provided with vertical limiting grooves 21 that correspond one-to-one with the vertical limiting blocks 20. The vertical limiting blocks 20 and the vertical limiting grooves 21 cooperate with each other to form a structure that limits the rotation of the massage rod 3 relative to the housing 1.

[0041] It should be noted that the rotary damper 19 is existing technology, such as the disc damper of model DA57A. The specific damping value can be selected from different brands and models of rotary dampers 19 as needed. It includes a housing 1 and a rotating component that can rotate relative to the housing 1. The rotating component will be damped during the rotation relative to the housing 1. The vertical limit block 20 is fixedly connected to the inner wall of the rotating component. The above structures are all common components known to those skilled in the art, and will not be described in detail here.

[0042] When in use, after the motor 9 is started, since the power block 17 is fixedly connected inside the power sleeve 2, when the power sleeve 2 rotates under the drive of the large gear 14, it will drive the power block 17 to rotate. Since the vertical limit block 20 will cooperate with the vertical limit groove 21, under the damping action of the rotation damper 19, the rotation of the vertical limit block 20 relative to the housing 1 will be restricted. Thus, under the cooperation of the vertical limit groove 21 and the vertical limit block 20, the massage rod 3 can only move up and down relative to the housing 1. At the same time, since the power block 17 slides in the spiral groove 18, it drives the massage rod 3 to move up and down under the action of the spiral groove 18. During the process of moving up and down, the massage rod 3 will not rotate.

[0043] As the motor 9 drives the power sleeve 2 to rotate continuously, the massage rod 3 continues to rise or fall until it reaches the limit position. At this time, because the motor 9 drives the power sleeve 2 to continue rotating, the massage rod 3 cannot continue to rise or fall under the limiting action of the lifting groove 15 and the limiting plate 16. Therefore, the vertical limiting block 20 will be stationary relative to the vertical limiting groove 21, and together they drive the massage rod 3 to overcome the damping effect of the rotation damper 19, so that the massage rod 3 drives the massage head 6 to rotate, thereby realizing the massage action. After continuous operation for a certain period of time, the motor 9 will receive a signal from the control system to reverse and repeat the above action to lower or raise the massage rod 3, and drive the massage rod 3 to rotate again at another limit position.

[0044] It should be noted that in this embodiment, there is no self-locking between the spiral groove 18 and the power block 17. When the massage rod 3 is subjected to downward pressure, it will retract while rotating.

[0045] The depth of the spiral groove 18 is greater than the depth of the vertical limiting groove 21, so that the power block 17 can always cooperate with the spiral groove 18.

[0046] Furthermore, by Figures 1 to 5 As shown, in order to achieve a better back massage effect, the limiting mechanism 7 includes a mounting block 22 fixedly connected to the upper end of the massage rod 3. A rotation limiting block 23 is fixedly connected to the upper side of the mounting block 22. The massage base 5 has a rotation limiting groove 24 that is adapted to the rotation limiting block 23. The rotation limiting block 23 and the rotation limiting groove 24 cooperate with each other to form a structure in which the massage base 5 is rotated and limited relative to the massage rod 3.

[0047] Furthermore, by Figures 1 to 5 As shown, in order to reduce the injury to the occupant, the collapse mechanism includes a collapse block 25, and a circular piece 27 is fixedly connected to the outside of the massage rod 3. The upper and lower ends of the collapse block 25 abut against the massage base 5 and the circular piece 27, respectively.

[0048] It should be noted that a circular hole is provided in the middle of the massage base 5, which is adapted to the cross section of the mounting block 22. The rotation limiting groove 24 is provided on the side wall of the circular hole for cooperating with the rotation limiting block 23. In addition, a relief groove is provided at the bottom of the massage head 6, which can accommodate the rotation limiting block 23 after the massage head 6 is pressed beyond the threshold.

[0049] It should also be noted that the collapse block 25 is a compression spring in this embodiment. The rotation limit block 23 is fixedly connected to the mounting block 22 by bolts. During assembly, the collapse block 25 is first fitted onto the outside of the mounting block 22. At this time, the bottom of the collapse block 25 contacts the circular piece 27. Then, the massage base 5 can be placed on the upper side of the collapse block 25, so that the circular hole passes through the mounting block 22. After that, the rotation limit block 23 can be fixed to the upper side of the mounting block 22 by bolts. During the installation of the rotation limit block 23, the collapse block 25 will be compressed, thereby achieving pre-tightening. By adjusting the elastic coefficient of the compression spring, different pre-tightening forces can be adjusted.

[0050] When in use, when the massage head 6 is subjected to greater pressure than the pre-tightening force, the compression spring will continue to be pressed down, which will cause the massage base 5 to move downward relative to the mounting block 22, thereby causing the rotation limit block 23 to disengage from the rotation limit groove 24, so that the massage base 5 can rotate relative to the massage rod 3.

[0051] Furthermore, by Figures 1 to 5 As shown, in order to achieve a better massage effect, massage claws 26 of different heights are fixedly connected to the upper side of the massage head 6. By setting massage claws 26 of different heights, the rotation strength of the massage claws 26 can be enhanced. The lower side of the massage head 6 is detachably connected to the massage base 5 by bolts.

[0052] When the present invention is used, after the motor 9 is started, since the power block 17 is fixedly connected inside the power sleeve 2, when the power sleeve 2 rotates under the drive of the large gear 14, it will drive the power block 17 to rotate. Since the vertical limiting block 20 will cooperate with the vertical limiting groove 21, under the damping action of the rotation damper 19, the rotation of the vertical limiting block 20 relative to the housing 1 will be restricted. Thus, under the cooperation of the vertical limiting groove 21 and the vertical limiting block 20, the massage rod 3 can only move up and down relative to the housing 1. At the same time, since the power block 17 slides in the spiral groove 18, it drives the massage rod 3 to move up and down under the action of the spiral groove 18. During the process of moving up and down, the massage rod 3 will not rotate.

[0053] As the motor 9 drives the power sleeve 2 to rotate continuously, the massage rod 3 continues to rise or fall until it reaches the limit position. At this time, because the motor 9 drives the power sleeve 2 to continue rotating, the massage rod 3 cannot continue to rise or fall under the limiting action of the lifting groove 15 and the limiting plate 16. Therefore, the vertical limiting block 20 will be stationary relative to the vertical limiting groove 21, and together they drive the massage rod 3 to overcome the damping effect of the rotation damper 19, so that the massage rod 3 drives the massage head 6 to rotate, thereby realizing the massage action. After continuous operation for a certain period of time, the motor 9 will receive a signal from the control system to reverse and repeat the above action to lower or raise the massage rod 3, and drive the massage rod 3 to rotate again at another limit position.

[0054] When the massage head 6 is subjected to greater pressure than the preload, the compression spring will continue to be compressed, causing the massage base 5 to move downward relative to the mounting block 22. This disengages the rotation limit block 23 from the rotation limit groove 24, allowing the massage base 5 to rotate relative to the massage rod 3. This enables the massage rod 3 to retract while the massage head 6 remains stationary, reducing the risk of injury to the occupant.

[0055] This invention features a novel structure, ingenious design, and simple and convenient operation. Through this design, the massage mechanism can be quickly retracted when the occupant is impacted, facilitating massage and achieving better massage power transmission. It can perform massages of different intensities and achieves the effect of automatic retraction after pressure, resulting in a better back massage effect and reducing the injury to the occupant.

[0056] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A collapsible seat massage mechanism, comprising a rotatable housing, wherein a rotatable power sleeve is provided on the upper side of the housing, characterized in that: The power sleeve has a massage rod slidably mounted inside. A lifting mechanism is provided between the massage rod and the power sleeve. The power sleeve drives the massage rod to rise and fall and rotate the massage rod at the highest and lowest positions through the lifting mechanism. A massage base is provided on the upper side of the massage rod. A massage head is detachably connected to the upper side of the massage base. A limiting mechanism is provided between the massage base and the massage rod to limit the rotation of the massage base relative to the massage rod. A collapsing mechanism is provided on the lower side of the massage base to disengage the limiting mechanism.

2. The collapsible chair massage mechanism according to claim 1, characterized in that: The housing contains a motor, and the output end of the motor is equipped with a reduction mechanism. The output end of the reduction mechanism is coaxially and fixedly connected to the power sleeve.

3. The collapsible chair massage mechanism according to claim 2, characterized in that: The reduction mechanism includes a worm gear fixedly connected to the motor output shaft, a worm wheel fitted on one side of the worm gear, a small gear fixedly connected coaxially to the upper side of the worm wheel, a large gear meshing on one side of the small gear, and a power sleeve fixedly connected coaxially to the upper side of the large gear.

4. The collapsible chair massage mechanism according to claim 1, characterized in that: The housing has a lifting groove inside, and the lower end of the massage rod is fixedly connected to a limiting piece that matches the lifting groove. The limiting piece and the lifting groove cooperate to form a structure in which the massage rod moves up and down relative to the housing.

5. The collapsible chair massage mechanism according to claim 1, characterized in that: The lifting mechanism includes a power block fixedly connected to the power sleeve. The power block is fixedly connected to the inner wall of the power sleeve. A spiral groove is provided on the outer side of the massage rod. The power block is slidably connected inside the spiral groove. A damping limiting component for rotating and limiting the massage rod is fixedly connected to the upper side of the housing.

6. A collapsible chair massage mechanism according to claim 5, characterized in that: The damping limiting assembly includes a rotary damper. Two vertical limiting blocks are fixedly connected to the inner wall of the rotating end of the rotary damper. The outer side of the massage rod is provided with vertical limiting grooves that correspond one-to-one with the vertical limiting blocks. The vertical limiting blocks and the vertical limiting grooves cooperate with each other to form a structure that limits the rotation of the massage rod relative to the housing.

7. The collapsible chair massage mechanism according to claim 1, characterized in that: The limiting mechanism includes a mounting block fixedly connected to the upper end of the massage rod, a rotation limiting block fixedly connected to the upper side of the mounting block, and a rotation limiting groove adapted to the rotation limiting block inside the massage base. The rotation limiting block and the rotation limiting groove cooperate with each other to form a structure that limits the rotation of the massage base relative to the massage rod.

8. A collapsible chair massage mechanism according to claim 7, characterized in that: The collapsing mechanism includes a collapsing block, and a circular piece is fixedly connected to the outside of the massage rod. The upper and lower ends of the collapsing block abut against the massage base and the circular piece, respectively.

9. A collapsible chair massage mechanism according to claim 1, characterized in that: The upper side of the massage head is fixedly connected to massage claws of different heights.

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