Massage machine core capable of adjusting distance between massage heads

Abstract

The invention relates to a massage machine core capable of adjusting the distance between massage heads, in particular to the technical field of massage equipment. The massager comprises a shell, a first motor, a second motor, a rotating shaft, a massage shaft and a shoulder and neck massage assembly. The first motor drives the two shoulder and neck massage assemblies to move face to face or back to back through the distance adjusting mechanism, and distance electric adjustment is achieved. In the distance adjusting mechanism, a left screw and a right screw are provided with first non-circular sections which are matched with guide holes of the shell to limit rotation of the screws, and the left screw and the right screw drive the shoulder and neck massage assembly to axially move and allow relative rotation through matching of a clamping ring and a limiting groove. The second motor drives the massage shaft to rotate through the transmission mechanism, and the massage shaft drives the shoulder and neck massage assembly to synchronously rotate through the second non-circular section to execute massage action. A rotation adjusting mechanism is further arranged on the shoulder massage assembly, and the extension length of the shoulder massage head can be manually and finely adjusted; the distance between the neck massage head and the shoulder massage head can be adjusted respectively to fit different body types, the structure is compact, and adjustment and massage do not interfere with each other.

Description

Technical Field

[0001] This invention relates to the field of massage equipment technology, and in particular to a massage mechanism with adjustable massage head spacing. Background Technology

[0002] With the improvement of people's living standards, massage devices, as health care equipment to relieve fatigue and relax the mind and body, have been widely used in daily life. Among them, neck and shoulder massagers are favored by many users because they can specifically massage the neck and shoulder areas.

[0003] Currently, there are various shoulder and neck massage components and devices on the market. For example, patent document CN202323384239.7 discloses a shoulder and neck massage component and device. This component includes a shoulder massage component and a neck massage component. A motor drives a rotating shaft to rotate, causing the shoulder and neck massage heads to perform reciprocating massage movements, enabling functions such as massage and tapping. This existing shoulder and neck massage component has a mature structure and can provide a relatively comfortable massage experience.

[0004] However, existing massage mechanisms generally suffer from the following shortcomings: First, the spacing between the two massage components is usually fixed and cannot be adjusted according to different users' shoulder width or neck circumference, resulting in poor fit between the massage head and the user's shoulders and neck, affecting the massage effect and comfort. Second, even if some products have a spacing adjustment function, their adjustment mechanism is often complex in structure, has a limited adjustment range, and it is difficult to achieve stable and reliable spacing adjustment while ensuring the massage function. Summary of the Invention

[0005] (1) Technical solution To solve the above-mentioned technical problems, the present invention provides a massage mechanism with adjustable massage head spacing, comprising: case; The first motor and the second motor are installed inside the housing; A rotating shaft and a massage shaft are rotatably supported within the housing; Two symmetrically arranged shoulder and neck massage components are respectively connected to the two ends of the massage shaft. The shoulder and neck massage components include a neck massage component and a shoulder massage component. A spacing adjustment mechanism is connected between the first motor, the rotating shaft, and the massage shaft to transmit the power of the first motor to the rotating shaft and the massage shaft and to adjust the distance between the two shoulder and neck massage components. A transmission mechanism connected between the second motor, the rotating shaft, and the massage shaft, used to drive the massage shaft to rotate so as to drive the shoulder and neck massage component to perform massage actions.

[0006] Preferably, the spacing adjustment mechanism includes: The first worm gear is fixedly connected to the output shaft of the first motor; A first worm gear, a first gear, and a second gear are fixedly connected to the rotating shaft, and the first worm meshes with the first worm gear; The left and right screws are sleeved on the massage shaft. The left and right adjusting gears are both tubular gears with teeth on the outer wall and threads on the inside. The threads of the left and right screws are opposite in direction and have a first non-circular cross section. The housing is provided with guide holes that are adapted to the first non-circular cross section to limit the rotation of the left and right screws relative to the housing. A left adjusting gear and a right adjusting gear are respectively threaded onto the left screw and the right screw, the left adjusting gear meshing with the first gear and the right adjusting gear meshing with the second gear; The two shoulder and neck massage components are respectively disposed at the ends of the left screw and the right screw that are far apart from each other. The left screw and the right screw are connected to their corresponding shoulder and neck massage components through the cooperation of retaining rings and limiting grooves to achieve axial fixation and circumferential relative rotation.

[0007] Preferably, a sleeve is connected to one end of the two shoulder and neck massage components that are close to each other, and the sleeve is provided with the limiting groove. The ends of the left screw and the right screw are provided with the retaining ring, and the retaining ring is rotatably embedded in the limiting groove.

[0008] Preferably, the left adjusting gear and the right adjusting gear are rotatably embedded in the housing.

[0009] Preferably, the first worm gear, the shaft, the first gear, and the second gear are integrally connected.

[0010] Preferably, the portion of the massage shaft used for mounting the shoulder and neck massage component has a second non-circular cross-section, and the shoulder and neck massage component is provided with mounting holes adapted to the second non-circular cross-section.

[0011] Preferably, the transmission mechanism includes: The second worm gear is fixedly connected to the output shaft of the second motor; A second worm gear is rotatably sleeved on the rotating shaft, and a third gear is fixedly connected to the second worm gear on the same axis. The second worm meshes with the second worm gear. A massage gear is fixedly connected to the massage shaft, and the third gear meshes with the massage gear.

[0012] Preferably, the assembly further includes a rotation adjustment mechanism disposed on the shoulder massage assembly for driving the extension and retraction of the shoulder massage head, the rotation adjustment mechanism comprising: The mounting sleeve is fixedly connected to the connecting arm of the shoulder massage assembly; An adjusting screw is movably inserted into the mounting cylinder along the axial direction, and one end of the adjusting screw extends out of the mounting cylinder and is fixedly connected to a shoulder massage head; An adjusting nut is threaded onto the adjusting screw.

[0013] Preferably, the adjusting nut is rotatably embedded in the middle of the mounting cylinder and is axially confined to the middle position of the adjusting nut.

[0014] Preferably, the portion of the adjusting screw located inside the mounting cylinder has a third non-circular cross-section, and the inner hole of the mounting cylinder has a shape adapted to the third non-circular cross-section.

[0015] (2) Beneficial effects This invention provides a massage mechanism with adjustable massage head spacing. Compared with the prior art, this invention has the following advantages: 1. The width between the two shoulder and neck massage components can be electrically adjusted by the motor-driven adjustment mechanism to adapt to different people's shoulder width and neck thickness; at the same time, the extension length of the shoulder massage head can also be manually adjusted to better fit the shoulder curve and make the massage experience more comfortable.

[0016] 2. The first worm gear, shaft, first gear and second gear are integrated into one structure, and the adjusting gear is directly embedded in the housing. The number of parts is small, the transmission loss is low, and the whole machine is more compact.

[0017] 3. The design of using a worm gear and screw drive has a self-locking function, so the distance will not change unexpectedly due to external force during the massage.

[0018] 4. The spacing adjustment is driven independently by the first motor, and the massage action is driven independently by the second motor. The two transmission systems are independent of each other, their functions do not interfere with each other, and their operation is stable and reliable. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention.

[0020] Figure 2 This is a top perspective view of the present invention after the upper part of the shell has been removed.

[0021] Figure 3 This is a top perspective view of the present invention, excluding the casing.

[0022] Figure 4 This is a top-view perspective view of the present invention, excluding the casing.

[0023] Figure 5 This is an exploded view of the rotary adjustment mechanism of the present invention.

[0024] Figure 6 This is a cross-sectional structural diagram of the present invention.

[0025] Figure 7 This is a perspective view of the massage shaft of the present invention.

[0026] Figure 8 This is a perspective view of the left and right adjusting gears of the present invention.

[0027] The attached figures are labeled as follows: 1-House, 2-First motor, 3-Second motor, 4-Rotating shaft, 5-Massage shaft, 6-Shoulder and neck massage assembly, 61-Neck massage assembly, 62-Shoulder massage assembly, 621-Connecting arm, 622-Mounting cylinder, 623-Screw, 624-Shoulder massage head, 625-Adjusting nut, 7-First worm gear, 8-First worm wheel, 9-First gear, 10-Second gear, 11-Second worm gear, 12-Second worm wheel, 13-Third gear, 14-Massage gear, 15-Left screw, 16-Right screw, 17-Left adjusting gear, 18-Right adjusting gear, 19-Snap ring, 20-Sleeve, 201-Limiting groove, 21-First non-circular section, 22-Second non-circular section, 23-Third non-circular section. Detailed Implementation

[0028] The present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0029] like Figures 1-8 As shown, the massage mechanism with adjustable massage head spacing according to the present invention includes a housing 1. A first motor 2 and a second motor 3 are installed inside the housing 1. A rotating shaft 4 and a massage shaft 5 are rotatably supported inside the housing 1. The rotating shaft 4 and the massage shaft 5 are arranged in parallel and are both mounted on the housing 1 by bearings.

[0030] Two shoulder and neck massage components 6 are symmetrically arranged and connected to both ends of the massage shaft 5, respectively. The shoulder and neck massage component 6 used in this embodiment is prior art, and its specific structure and massage function implementation method have been fully disclosed in patent document CN202323384239.7 cited in the background section of this case. Those skilled in the art can realize the massage, percussion, and other functions of the shoulder and neck massage component 6 based on this prior art; therefore, its internal structure will not be described in detail here. It should be noted that the shoulder and neck massage component 6 includes a neck massage component 61 and a shoulder massage component 62.

[0031] Connection between the massage shaft and the shoulder and neck massage components: like Figure 7As shown, the portion of the massage shaft 5 used for mounting the neck and shoulder massage component 6 has a second non-circular cross-section 22 (e.g., a double-flat cross-section, a D-shaped cross-section, or a spline cross-section). The neck and shoulder massage component 6 has mounting holes adapted to the second non-circular cross-section 22. The main function of the second non-circular cross-section 22 is to prevent the neck and shoulder massage component 6 from rotating relative to the massage shaft 5 during the spacing adjustment process, when the left screw 15 and the right screw 16 drive the neck and shoulder massage component 6 to move axially, ensuring that the neck and shoulder massage component 6 can only slide smoothly along the axial direction, avoiding adjustment failure due to deflection or jamming. At the same time, during the massage process, this non-circular cross-section can also transmit rotational torque, enabling the massage shaft 5 to drive the neck and shoulder massage component 6 to rotate synchronously and perform massage actions.

[0032] Spacing adjustment mechanism: The spacing adjustment mechanism is used to transmit the power of the first motor 2 to the rotating shaft 4 and the massage shaft 5, and to adjust the spacing between the two shoulder and neck massage components 6.

[0033] Specifically, a first worm gear 7 is fixedly connected to the output shaft of the first motor 2. A first worm wheel 8, a first gear 9, and a second gear 10 are fixedly connected to the rotating shaft 4. The first worm gear 7 and the first worm wheel 8 mesh with each other to form a worm gear reduction transmission pair. The first worm wheel 8, the rotating shaft 4, the first gear 9, and the second gear 10 are preferably integrally connected (such as integral injection molding or integral casting) to achieve synchronous rotation.

[0034] like Figure 8 As shown, the left screw 15 and the right screw 16 are sleeved on the massage shaft 5. The threads of the left screw 15 and the right screw 16 have opposite directions of rotation (for example, the left screw 15 has a left-hand thread and the right screw 16 has a right-hand thread, or vice versa). The left screw 15 and the right screw 16 have a first non-circular cross-section 21 (for example, a double-flat cross-section, a square cross-section, or a D-shaped cross-section). The housing 1 is provided with a guide hole adapted to the first non-circular cross-section 21. This guide hole is used to restrict the rotation of the left screw 15 and the right screw 16 relative to the housing 1, while allowing the left screw 15 and the right screw 16 to move freely in the axial direction.

[0035] Both the left adjusting gear 17 and the right adjusting gear 18 are tubular gears with teeth on the outer wall and threads on the inside. The left adjusting gear 17 is threaded to the left screw 15, and the right adjusting gear 18 is threaded to the right screw 16. The left adjusting gear 17 meshes with the first gear 9, and the right adjusting gear 18 meshes with the second gear 10.

[0036] The left adjusting gear 17 and the right adjusting gear 18 are rotatably embedded in the housing 1. Specifically, the housing 1 is provided with a receiving cavity or annular groove, in which the left adjusting gear 17 and the right adjusting gear 18 are placed and axially limited by a retaining ring or the stepped structure of the housing itself, so that they can rotate freely relative to the housing 1 but cannot move axially.

[0037] Two shoulder and neck massage components 6 are respectively located at the ends of the left screw 15 and the right screw 16 that are far apart from each other. For example... Figure 6 As shown, the left screw 15 and right screw 16 are axially fixed and circumferentially rotatable with their corresponding shoulder and neck massage components 6 through the engagement of retaining rings 19 and limiting grooves 201. Specifically, sleeves 20 are connected to the ends of the two shoulder and neck massage components 6 that are close to each other, and the sleeves 20 are provided with limiting grooves 201; retaining rings 19 are provided at the ends of the left screw 15 and right screw 16, and the retaining rings 19 are rotatably embedded in the limiting grooves 201. In this way, when the left screw 15 and right screw 16 move axially, the engagement of retaining rings 19 and limiting grooves 201 drives the shoulder and neck massage components 6 to move synchronously; at the same time, retaining rings 19 can rotate freely within the limiting grooves 201, so that the shoulder and neck massage components 6 can rotate freely relative to the left screw 15 and right screw 16 during massage, while the left screw 15 and right screw 16 remain stationary (non-rotating) due to the engagement of the first non-circular cross section 21 with the guide hole of the housing 1.

[0038] The working principle of spacing adjustment: When it is necessary to adjust the distance between the two shoulder and neck massage components 6, the first motor 2 is activated. The first motor 2 drives the first worm gear 7 to rotate, and the first worm gear 7 drives the first worm wheel 8 to rotate. The first worm wheel 8 drives the rotating shaft 4 to rotate synchronously, which in turn drives the first gear 9 and the second gear 10 to rotate synchronously.

[0039] The first gear 9 drives the left adjusting gear 17 to rotate. Since the left adjusting gear 17 is axially limited by the housing 1 (it can only rotate, not move axially), and the left screw 15 is circumferentially limited by the guide hole on the housing 1 through the first non-circular cross-section 21 (it can only move axially, not rotate), the rotational motion of the left adjusting gear 17 is converted into the axial movement of the left screw 15. Similarly, the second gear 10 drives the right adjusting gear 18 to rotate, which in turn drives the right screw 16 to move axially in the opposite direction.

[0040] By controlling the forward and reverse rotation of the first motor 2, the left screw 15 and the right screw 16 can move towards each other (the two shoulder and neck massage components 6 move closer to each other) or away from each other (the two shoulder and neck massage components 6 move further apart). The left screw 15 and the right screw 16, through the cooperation of the retaining ring 19 and the limiting groove 201, drive the shoulder and neck massage components 6 to move axially synchronously, thereby precisely adjusting the width between the two shoulder and neck massage components 6 to adapt to different users' shoulder width and neck circumference.

[0041] Transmission mechanism: The transmission mechanism is used to transmit the power of the second motor 3 to the massage shaft 5 to drive the massage shaft 5 to rotate.

[0042] Specifically, a second worm gear 11 is fixedly connected to the output shaft of the second motor 3. A second worm wheel 12 (e.g., mounted via a bearing) is rotatably mounted on the rotating shaft 4, and the second worm wheel 12 is coaxially and fixedly connected to the third gear 13. The second worm gear 11 and the second worm wheel 12 mesh with each other. A massage gear 14 is fixedly connected to the massage shaft 5, and the third gear 13 meshes with the massage gear 14.

[0043] Massage working principle: When a massage action is required, the second motor 3 is activated. The second motor 3 drives the second worm gear 11 to rotate, which in turn drives the second worm wheel 12 to rotate. The second worm wheel 12 drives the third gear 13, which is fixed coaxially with it, to rotate synchronously. The third gear 13 drives the massage gear 14 to rotate. The massage gear 14 then drives the massage shaft 5 to rotate.

[0044] Since the part of the massage shaft 5 used to install the shoulder and neck massage component 6 has a second non-circular cross section 22, and the shoulder and neck massage component 6 is provided with a matching mounting hole, the massage shaft 5 rotates and drives the shoulder and neck massage component 6 to rotate synchronously, thereby realizing massage actions such as kneading and tapping.

[0045] During the massage process, the first motor 2 is not working, and its first worm gear 7 and first worm wheel 8 are self-locked, keeping the rotating shaft 4, first gear 9, and second gear 10 stationary. Therefore, the left adjusting gear 17 and right adjusting gear 18 are not actively driven. The left screw 15 and right screw 16 remain stationary (do not rotate) due to the fit between the first non-circular cross section 21 and the guide hole of the housing 1. Since the left screw 15 and right screw 16 are circumferentially rotatable relative to the shoulder and neck massage component 6 through the retaining ring 19 and the limiting groove 201, the rotation of the shoulder and neck massage component 6 will not drive the left screw 15 and right screw 16 to rotate, and there is no motion interference between them. At the same time, the left adjusting gear 17 and right adjusting gear 18 are axially limited by the housing 1 and are not driven, so the left screw 15 and right screw 16 will not move axially, and the adjusted spacing remains unchanged.

[0046] The massage mechanism of the present invention also includes a rotary adjustment mechanism disposed on the shoulder massage assembly 62 for driving the extension and retraction of the shoulder massage head; the rotary adjustment mechanism is used to finely adjust the shoulder massage position.

[0047] like Figure 5 As shown, the rotary adjustment mechanism includes a mounting cylinder 622, an adjusting screw 623, and an adjusting nut 625.

[0048] The mounting sleeve 622 is fixedly connected to the connecting arm 621 of the shoulder massage assembly 62. The adjusting screw 623 is axially movable and passes through the mounting sleeve 622, with one end of the adjusting screw 623 extending out of the mounting sleeve 622 and fixedly connected to the shoulder massage head 624. The adjusting nut 625 is threadedly connected to the adjusting screw 623.

[0049] The adjusting nut 625 is rotatably fitted into the middle of the mounting cylinder 622 and is axially confined to the middle position of the mounting cylinder 622. Specifically, a nut mounting cavity is formed in the middle of the mounting cylinder 622, in which the adjusting nut 625 is placed, and axial confinement is achieved by a retaining ring or the stepped structure of the cylinder wall itself, allowing it to rotate freely but not move axially. The outer circumferential surface of the adjusting nut 625 is preferably provided with anti-slip texture (such as knurling or raised ridges) to facilitate manual rotation by the user.

[0050] The portion of the adjusting screw 623 located within the mounting cylinder 622 has a second non-circular cross-section 2223 (e.g., a double-flat cross-section, a D-shaped cross-section, or a square cross-section), and the inner bore of the mounting cylinder 622 has a shape adapted to this second non-circular cross-section 2223. This allows the adjusting screw 623 to slide axially but not rotate relative to the mounting cylinder 622.

[0051] Rotary adjustment working principle: When the user needs to fine-tune the extension length of the shoulder massage head 624, they manually rotate the adjusting nut 625. Since the adjusting nut 625 is axially confined in the middle of the mounting cylinder 622 (it can only rotate, not move axially), and the adjusting screw 623 is circumferentially confined in the mounting cylinder 622 by the second non-circular cross-section 2223 (it can only move axially, not rotate), the rotational movement of the adjusting nut 625 is converted into the axial movement of the adjusting screw 623. The adjusting screw 623 drives the shoulder massage head 624 to extend or retract, thereby achieving fine-tuning of the distance between the two shoulder massage heads 624.

[0052] When using the massage mechanism of this invention, the user can first start the first motor 2 and adjust the two shoulder and neck massage components 6 to a suitable width according to their own shoulder width and neck circumference. Then, the user can manually rotate the adjusting nut 625 to further fine-tune the extension length of the shoulder massage head 624, so that the shoulder massage head 624 better fits the acupoints on the shoulder. Finally, the second motor 3 is started, and the massage shaft 5 drives the shoulder and neck massage components 6 to rotate, performing massage, tapping and other actions.

[0053] Throughout the massage process, the user can adjust the massage position at any time using the first motor 2 and the adjusting nut 625 to obtain the best massage experience.

[0054] Any content not described in detail in this specification is prior art known to those skilled in the art.

[0055] The embodiments described above are merely preferred embodiments of the present invention, and are described in a relatively specific and detailed manner. However, the present invention is not limited to these embodiments. It should be noted that for those skilled in the art, any modifications made without departing from the spirit of the present invention fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A massage mechanism with adjustable massage head spacing, characterized in that, include: Shell (1); The first motor (2) and the second motor (3) are installed inside the housing (1); A rotating shaft (4) and a massage shaft (5) are rotatably supported within the housing (1). Two symmetrically arranged shoulder and neck massage components (6) are respectively connected to the two ends of the massage shaft (5). The shoulder and neck massage components (6) include a neck massage component (61) and a shoulder massage component (62). A spacing adjustment mechanism is connected between the first motor (2), the rotating shaft (4) and the massage shaft (5) to transmit the power of the first motor (2) to the rotating shaft (4) and the massage shaft (5) and to realize the spacing adjustment of the two shoulder and neck massage components (6); A transmission mechanism connected between the second motor (3), the rotating shaft (4) and the massage shaft (5) for driving the massage shaft (5) to rotate so as to drive the shoulder and neck massage assembly (6) to perform massage actions.

2. The massage mechanism with adjustable massage head spacing according to claim 1, characterized in that, The spacing adjustment mechanism includes: The first worm (7) is fixedly connected to the output shaft of the first motor (2); The first worm gear (8), the first gear (9), and the second gear (10) are fixedly connected to the rotating shaft (4), and the first worm (7) meshes with the first worm gear (8); The left screw (15) and right screw (16) are sleeved on the massage shaft (5). The left adjusting gear (17) and the right adjusting gear (18) are both tubular gears with teeth on the outer wall and threads on the inside. The threads of the left screw (15) and the right screw (16) are opposite. The left screw (15) and the right screw (16) have a first non-circular cross section (21). The housing (1) is provided with a guide hole that is adapted to the first non-circular cross section (21) to restrict the rotation of the left screw (15) and the right screw (16) relative to the housing (1). A left adjusting gear (17) and a right adjusting gear (18) are respectively threaded onto the left screw (15) and the right screw (16). The left adjusting gear (17) meshes with the first gear (9), and the right adjusting gear (18) meshes with the second gear (10). The two shoulder and neck massage components (6) are respectively disposed at the ends of the left screw (15) and the right screw (16) that are far apart from each other. The left screw (15) and the right screw (16) are connected to their corresponding shoulder and neck massage components (6) through the cooperation of the retaining ring (19) and the limiting groove (201) to achieve axial fixation and circumferential relative rotation.

3. The massage mechanism with adjustable massage head spacing according to claim 2, characterized in that, Two shoulder and neck massage components (6) are connected to sleeves (20) at their close ends. The sleeves (20) are provided with the limiting grooves (201). The ends of the left screw (15) and the right screw (16) are provided with retaining rings (19), which are rotatably embedded in the limiting grooves (201).

4. The massage mechanism with adjustable massage head spacing according to claim 2, characterized in that, The left adjusting gear (17) and the right adjusting gear (18) are rotatably fitted into the housing (1).

5. A massage mechanism with adjustable massage head spacing according to claim 2, characterized in that, The first worm gear (8), the shaft (4), the first gear (9) and the second gear (10) are an integrally connected structure.

6. The massage mechanism with adjustable massage head spacing according to claim 1, characterized in that, The part of the massage shaft (5) used to install the shoulder and neck massage component (6) has a second non-circular cross section (22), and the shoulder and neck massage component (6) is provided with a mounting hole that is adapted to the second non-circular cross section (22).

7. A massage mechanism with adjustable massage head spacing according to claim 1, characterized in that, The transmission mechanism includes: The second worm (11) is fixedly connected to the output shaft of the second motor (3); A second worm gear (12) is rotatably mounted on the rotating shaft (4), and a third gear (13) is coaxially fixedly connected to the second worm gear (12). The second worm (11) meshes with the second worm gear (12). A massage gear (14) is fixedly connected to the massage shaft (5), and the third gear (13) meshes with the massage gear (14).

8. The massage mechanism with adjustable massage head spacing according to claim 1, characterized in that, It also includes a rotary adjustment mechanism disposed on the shoulder massage assembly (62) for driving the extension and retraction of the shoulder massage head, the rotary adjustment mechanism comprising: The mounting sleeve (622) is fixedly connected to the connecting arm (621) of the shoulder massage assembly (62); An adjusting screw (623) is axially movable inside the mounting cylinder (622), and one end of the adjusting screw (623) extends out of the mounting cylinder (622) and is fixedly connected to a shoulder massage head (624). Adjusting nut (625) is threaded onto the adjusting screw (623).

9. A massage mechanism with adjustable massage head spacing according to claim 8, characterized in that, The adjusting nut (625) is rotatably embedded in the middle of the mounting cylinder (622) and is axially confined to the middle position of the adjusting nut (625).

10. A massage mechanism with adjustable massage head spacing according to claim 8, characterized in that, The portion of the adjusting screw (623) located inside the mounting cylinder (622) has a second non-circular cross section (23), and the inner hole of the mounting cylinder (622) has a shape adapted to the second non-circular cross section (23).

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