A shoulder and neck massager

Abstract

This utility model discloses a shoulder and neck massager, including a housing, a drive shaft, a drive motor, and a pair of massage arms. The drive shaft is rotatably mounted inside the housing and is connected to the drive motor. A pair of eccentric bushings are mounted on the drive shaft. One end of each massage arm is movably fitted onto a corresponding eccentric bushing, while the other end extends outward through a movable hole in the housing and oscillates back and forth relative to the movable hole as the eccentric bushing rotates. An adjustment knob is provided on the housing, which is linked to the axially movable eccentric bushing. A press-to-unlock mechanism is provided between the adjustment knob and the housing. Pressing the adjustment knob releases the lock; after unlocking, sliding the adjustment knob along the drive shaft axially moves the eccentric bushing along the drive shaft axially to adjust the distance between the two massage arms. This utility model, through the press-to-unlock and then sliding-to-adjust mechanism, effectively prevents accidental triggering, improves locking reliability, and enhances operational stability.

Description

Technical Field

[0001] This utility model relates to the field of massager technology, and in particular to a shoulder and neck massager. Background Technology

[0002] Neck and shoulder massagers typically consist of a housing, a drive motor, and a pair of massage arms. The drive motor moves the massage arms to massage the user's neck and shoulder area. To accommodate different user body shapes, neck and shoulder widths, and different massage areas, the spacing between the massage arms usually needs to be adjustable. In existing technologies, the spacing of the massage arms is often adjusted by direct tossing or sliding. For example, a sliding knob or slider is provided on the housing, and manually pushing the knob or slider directly moves the massage arms, bringing them closer together or further apart. Some designs also achieve spacing adjustment by directly pushing and pulling the massage arms.

[0003] However, the aforementioned direct sliding adjustment method has significant shortcomings: a reliable locking mechanism is typically lacking between the adjustment element and the outer casing, or it relies solely on friction for positioning, resulting in poor locking stability. Users may also accidentally touch the adjustment element during use, further increasing the risk of accidental triggering. Furthermore, since most existing adjustment methods are direct sliding adjustments, lacking active unlocking and reliable locking procedures, users cannot ensure that the massage arm remains stably in the desired position after adjustment, affecting the massage effect and user experience.

[0004] Therefore, the existing shoulder and neck massagers have problems such as easy accidental triggering, unreliable locking, and poor adjustment stability in the adjustment structure, making it difficult to ensure stability and reliability during use while adapting to users with different body parts or body types. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a shoulder and neck massager.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a shoulder and neck massager, comprising a housing, a drive shaft, a drive motor, and a pair of massage arms. The drive shaft is rotatably disposed within the housing and is connected to the drive motor. A pair of eccentric bushings are disposed on the drive shaft, each eccentric bushing being circumferentially linked to the drive shaft, and at least one eccentric bushing being axially movable relative to the drive shaft. One end of each massage arm is movably sleeved on the corresponding eccentric bushing, and the other end extends to the outside through a movable hole in the housing, and oscillates back and forth relative to the movable hole as the eccentric bushing rotates. An adjustment knob is disposed on the housing, and the adjustment knob is linked to the axially movable eccentric bushing. A press-unlock mechanism is disposed between the adjustment knob and the housing. When the adjustment knob is pressed, it is unlocked, and after unlocking, when it slides axially along the drive shaft, it drives the eccentric bushing to move axially along the drive shaft, thereby driving the corresponding massage arm to move axially relative to the drive shaft, so as to adjust the distance between the two massage arms.

[0007] By adopting the above technical solution and setting a press-to-unlock mechanism, the adjustment knob must be pressed to unlock before it can slide axially along the drive shaft. The adjustment knob then drives the axially movable eccentric sleeve to move axially, which in turn moves the massage arms axially to adjust the distance between the two massage arms. Therefore, the adjustment action requires "pressing to unlock first, then sliding to adjust," effectively preventing accidental changes in the distance between the massage arms due to user's body, clothing, or vibrations, thus improving locking reliability and operational stability. At the same time, users can still actively adjust the distance between the two massage arms according to different body types, shoulder and neck widths, or massage areas, balancing adjustment flexibility and safety.

[0008] As a preferred embodiment of this utility model, the outer casing is provided with a toggle sliding hole, and the adjustment toggle passes through the toggle sliding hole and can slide along the toggle sliding hole; a sliding seat is provided inside the outer casing, and the sliding seat is slidably disposed inside the outer casing along the axial direction of the transmission shaft, and sleeved on one of the eccentric bushings; the eccentric bushing is circumferentially rotated and axially limited to the sliding seat, so that the eccentric bushing can rotate circumferentially relative to the sliding seat, and moves axially synchronously with the sliding seat when the sliding seat moves along the axial direction of the transmission shaft; the adjustment toggle is linked to the sliding seat, and when the adjustment toggle is unlocked, it drives the sliding seat to move along the axial direction of the transmission shaft.

[0009] By adopting the above technical solution, the adjustment knob is guided by a sliding hole, and a sliding seat is fitted outside the eccentric bushing, allowing the eccentric bushing to rotate circumferentially and be axially limited. This separates the circumferential rotation and axial movement of the eccentric bushing: the eccentric bushing can still rotate circumferentially relative to the sliding seat to ensure normal oscillating massage of the massage arms; simultaneously, the axial movement of the sliding seat drives the eccentric bushing to move synchronously axially, thus reliably adjusting the distance between the massage arms. This structure makes the adjustment transmission chain clear, the sliding smooth, and the axial linkage reliable, avoiding unnecessary axial movement of the eccentric bushing during transmission, and improving the overall adjustment stability and structural reliability.

[0010] In a preferred embodiment of this invention, the adjustment knob is inserted into the sliding seat, and a compression spring is provided between the sliding seat and the adjustment knob. The press-to-unlock mechanism includes a limiting block disposed on the adjustment knob and a gear limiting track disposed within the housing and extending along the sliding direction of the adjustment knob. The gear limiting track has multiple limiting grooves. When the adjustment knob is pressed, the limiting block overcomes the force of the compression spring and disengages from the limiting groove to unlock. After the adjustment knob is released, under the action of the compression spring, the limiting block engages with the corresponding limiting groove to relock.

[0011] By adopting the above technical solution, pressing the adjustment knob causes the limiting block to overcome the force of the compression spring and disengage from the limiting groove, achieving active unlocking; after releasing the adjustment knob, the limiting block engages with the corresponding limiting groove under the action of the compression spring, achieving automatic relocking. Thus, on the one hand, multi-level adjustment is achieved, allowing users to stably maintain the massage arms at a suitable distance as needed; on the other hand, locking no longer relies solely on friction, but achieves reliable positioning through the mechanical engagement of the limiting block and the limiting groove, effectively preventing the adjustment components from sliding due to vibrations during massager operation or accidental user contact, significantly improving anti-accidental touch capability and locking stability, and making operation more intuitive and convenient.

[0012] As a preferred embodiment of this utility model, the sliding seat includes a sliding frame and a seat ring. The sliding frame is slidably disposed within the housing along the axial direction of the transmission shaft and has a slot for the adjustment knob to be inserted and fitted. The seat ring is connected to the sliding frame and sleeved on the outside of the eccentric bushing. The seat ring has a mounting hole, and the outer wall of the eccentric bushing is circumferentially rotated with the mounting hole.

[0013] By adopting the above technical solution, this structure allows the sliding frame to serve as both an insertion and linkage component for the adjustment knob, and also to slide stably along the drive shaft axially within the housing; the seat ring is specifically designed to support and engage the eccentric bushing, ensuring that the eccentric bushing can rotate circumferentially while simultaneously moving axially synchronously with the sliding seat. The overall structure is compact and easy to assemble.

[0014] As a preferred embodiment of this utility model, there are two adjustment knobs, which are respectively disposed on both sides of the sliding seat and arranged symmetrically; the two sides of the outer shell are respectively provided with knob sliding holes, and the two adjustment knobs are respectively inserted into the corresponding knob sliding holes; the limiting block, the compression spring and the gear limiting rail are each configured in two sets; only when the two adjustment knobs are pressed at the same time, causing the two limiting blocks to overcome the force of the corresponding compression spring and disengage from the corresponding limiting grooves, can the sliding seat slide along the drive shaft axially to adjust the distance between the two massage arms.

[0015] By adopting the above technical solution, this setting requires the unlocking action to be completed by pressing both sides simultaneously, which can effectively avoid accidental locking caused by accidental touch on one side or by chance, and further improve the anti-accidental touch performance; at the same time, the symmetrical arrangement on both sides makes the sliding seat more evenly stressed, less prone to tilting during sliding, more stable adjustment process, and more reliable locking state.

[0016] As a preferred technical solution of this utility model, the adjustment knob includes an insert plate and a toggle block connected to the insert plate. The insert plate is inserted into the sliding seat and the insert plate is limited to the inside of the knob sliding hole. The limiting block is fixed or integrally disposed on the insert plate. The toggle block is slidably disposed in the knob sliding hole and the toggle block part protrudes from the outer surface of the outer shell.

[0017] By adopting the above technical solution, the structure enables the adjustment knob to simultaneously possess the functions of insertion linkage, limit locking, and external pressing operation. The structure is simple and compact, and easy to manufacture and assemble. The insertion plate and the sliding seat can ensure reliable linkage between the knob and the sliding seat. The limit block and the gear limit track cooperate to achieve stable locking. The protruding toggle block makes it easy for the user to press and toggle, thereby improving the convenience and reliability of the adjustment operation.

[0018] In a preferred embodiment of this invention, the output shaft of the drive motor and the transmission shaft are connected by a gear set.

[0019] By adopting the above technical solution, the gear transmission has the advantages of smooth transmission, reliable torque transmission and mature structure. It can provide stable power to the transmission shaft and its eccentric bushing, thereby ensuring that the massage clamp arm swings back and forth stably along the predetermined trajectory.

[0020] As a preferred technical solution of this utility model, the outer shell includes a movement receiving head and a grip handle, the grip handle extends from the movement receiving head and forms a crank structure; one end of the movement receiving head is provided with an opening, the opening is connected to a flexible cover plate, and two sets of movable holes are provided and symmetrically opened on the flexible cover plate.

[0021] By adopting the above technical solution, the structure makes the massager more suitable for the human shoulder and neck area and the user's grip and usage habits. The handle structure makes it easy for users to hold and position the device. The flexible cover plate can improve the comfort and fit when in contact with the human body. At the same time, the symmetrically arranged movable holes make it easy for a pair of massage arms to extend stably and swing back and forth, ensuring reliable massage action.

[0022] As a preferred embodiment of the present invention, the outer wall of the eccentric bushing is provided with an annular inclined groove, and one end of the massage clamp arm is provided with a sleeve portion, which is movably fitted into the annular inclined groove.

[0023] By adopting the above technical solution, the rotational motion of the eccentric bushing can be transformed into the reciprocating swing or kneading motion of the massage arm through the cooperation of the annular inclined groove and the sleeve. The structure is simple, the motion is reliable, and the transmission efficiency is high. The sleeve is movably fitted in the annular inclined groove, which can reduce jamming and wear during the movement, making the massage arm move more smoothly and stably, thereby improving the massage effect and service life. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram of the structure of the eccentric bushing and sliding seat in this utility model; Figure 4 This is a schematic diagram of the structure inside the outer shell of this utility model; Figure 5 This is an exploded view of the sliding seat and adjusting knob in this utility model; Figure 6 This is a schematic diagram of the structure of the drive shaft and eccentric bushing in this utility model.

[0025] Reference numerals: 1. Outer shell; 11. Movable hole; 12. Toggle slide hole; 13. Gear limit rail; 131. Limit groove; 14. Mechanism receiving head; 15. Grip handle; 16. Flexible cover plate; 2. Drive shaft; 3. Drive motor; 4. Massage arm; 41. Sleeve; 5. Eccentric bushing; 51. Annular oblique groove; 6. Adjustment knob; 61. Limit block; 62. Insert plate; 63. Toggle block; 7. Sliding seat; 71. Compression spring; 72. Sliding frame; 721. Slot; 73. Seat ring; 731. Mounting hole; 8. Gear set. Detailed Implementation

[0026] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0027] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0028] like Figures 1 to 6 A neck and shoulder massager is shown, comprising a housing 1, a drive shaft 2, a drive motor 3, and a pair of massage arms 4. The drive shaft 2 is rotatably disposed within the housing 1 and is connected to the drive motor 3. A pair of eccentric bushings 5 ​​are disposed on the drive shaft 2, each eccentric bushing 5 being circumferentially linked to the drive shaft 2, and at least one eccentric bushing 5 being axially movable relative to the drive shaft 2. One end of each massage arm 4 is movably sleeved on the corresponding eccentric bushing 5, and the other end extends to the outside through a movable hole 11 in the housing 1, moving axially with the drive shaft 3. The spindle sleeve 5 rotates and reciprocates relative to the movable hole 11; an adjustment knob 6 is provided on the outer shell 1, and the adjustment knob 6 is linked to the axially movable eccentric sleeve 5; a press-unlock mechanism is provided between the adjustment knob 6 and the outer shell 1; when the adjustment knob 6 is pressed, it is unlocked, and when it slides along the drive shaft 2 after unlocking, it drives the eccentric sleeve 5 to move along the drive shaft 2, thereby driving the corresponding massage arm 4 to move axially relative to the drive shaft 2, so as to adjust the distance between the two massage arms 4.

[0029] By incorporating a press-to-unlock mechanism, the adjustment knob 6 must be pressed to unlock before it can slide axially along the drive shaft 2. The adjustment knob 6 then drives the axially movable eccentric sleeve 5 to move axially, which in turn moves the massage arms 4 axially to adjust the distance between the two massage arms 4. Therefore, the adjustment action requires "pressing to unlock first, then sliding to adjust," effectively preventing accidental changes in the distance between the massage arms 4 due to user's body, clothing, or vibrations, thus improving locking reliability and operational stability. Simultaneously, users can still actively adjust the distance between the two massage arms 4 according to different body types, shoulder and neck widths, or massage areas, balancing adjustment flexibility and safety.

[0030] In this embodiment, the transmission shaft 2 is connected to the drive motor 3. An eccentric bushing 5 is mounted on the transmission shaft 2, and one end of the massage arm 4 is movably fitted onto the corresponding eccentric bushing 5. When the drive motor 3 operates, it drives the transmission shaft 2 to rotate, which in turn drives the eccentric bushing 5 to rotate. The eccentric bushing 5 then drives the massage arm 4 to reciprocate relative to the movable hole 11 of the outer casing 1, thereby achieving a massage action. It should be noted that the eccentric transmission cooperation between the transmission shaft 2, the eccentric bushing 5, and the massage arm 4, and the specific implementation of the reciprocating swing of the massage arm 4 when the eccentric bushing 5 rotates, can employ known eccentric transmission structures in the art, which are conventional technical means in this field. The improvement of this utility model focuses on the spacing adjustment, press-to-unlock, and locking structures between the massage arms 4; therefore, the specific structure and working principle of the eccentric transmission part will not be elaborated further.

[0031] The outer casing 1 has a toggle hole 12, and the adjustment knob 6 passes through the toggle hole 12 and can slide along the toggle hole 12. A sliding seat 7 is provided inside the outer casing 1. The sliding seat 7 is slidably disposed inside the outer casing 1 along the axial direction of the transmission shaft 2 and is sleeved on one of the eccentric bushings 5. The eccentric bushing 5 and the sliding seat 7 are circumferentially rotated and axially limited, so that the eccentric bushing 5 can rotate circumferentially relative to the sliding seat 7 and move axially synchronously with the sliding seat 7 when the sliding seat 7 moves along the axial direction of the transmission shaft 2. The adjustment knob 6 is linked to the sliding seat 7. When the adjustment knob 6 is unlocked, it drives the sliding seat 7 to move along the axial direction of the transmission shaft 2.

[0032] The adjustment knob 6 is guided by the sliding hole 12. A sliding seat 7 is fitted over the eccentric sleeve 5, allowing the eccentric sleeve 5 to rotate circumferentially and be axially limited. This separates the circumferential rotation and axial movement of the eccentric sleeve 5: the eccentric sleeve 5 can still rotate circumferentially relative to the sliding seat 7 to ensure normal oscillating massage of the massage arms 4; simultaneously, the axial movement of the sliding seat 7 drives the eccentric sleeve 5 to move synchronously, thus reliably adjusting the distance between the massage arms 4. This structure ensures a clear adjustment transmission chain, smooth sliding, and reliable axial linkage, preventing unnecessary axial movement of the eccentric sleeve 5 during transmission and improving overall adjustment stability and structural reliability.

[0033] An adjustment knob 6 is inserted into the sliding seat 7, and a compression spring 71 is provided between the sliding seat 7 and the adjustment knob 6. The press-to-unlock mechanism includes a limiting block 61 disposed on the adjustment knob 6, and a gear limiting track 13 disposed in the housing 1 and extending along the sliding direction of the adjustment knob 6. The gear limiting track 13 has multiple limiting grooves 131. When the adjustment knob 6 is pressed, the limiting block 61 overcomes the force of the compression spring 71 and disengages from the limiting groove 131 to unlock. After the adjustment knob 6 is released, under the action of the compression spring 71, the limiting block 61 engages with the corresponding limiting groove 131 to relock.

[0034] By pressing the adjustment knob 6, the limiting block 61 overcomes the force of the compression spring 71 and disengages from the limiting groove 131, achieving active unlocking. After releasing the adjustment knob 6, the limiting block 61 engages with the corresponding limiting groove 131 under the action of the compression spring 71, achieving automatic relocking. Thus, on the one hand, multi-level adjustment is achieved, allowing the user to stably maintain the massage arm 4 at a suitable distance as needed; on the other hand, locking no longer relies solely on friction, but achieves reliable positioning through the mechanical engagement of the limiting block 61 and the limiting groove 131, effectively preventing the adjustment parts from sliding due to vibration during massager operation or accidental user contact, significantly improving the anti-accidental touch capability and locking stability, and making operation more intuitive and convenient.

[0035] The sliding seat 7 includes a sliding frame 72 and a seat ring 73. The sliding frame 72 is slidably disposed in the housing 1 along the axial direction of the transmission shaft 2 and has a slot 721 for the adjustment knob 6 to be inserted and fitted. The seat ring 73 is connected to the sliding frame 72 and is sleeved on the outside of the eccentric bushing 5. The seat ring 73 has a mounting hole 731, and the outer wall of the eccentric bushing 5 is circumferentially rotated with the mounting hole 731.

[0036] This structure allows the sliding frame 72 to function as both an insertion and linkage component for the adjustment knob 6, and to slide stably along the drive shaft 2 within the housing 1. The seat ring 73 is specifically designed to support and engage the eccentric bushing 5, ensuring that the eccentric bushing 5 can rotate circumferentially while simultaneously moving axially synchronously with the sliding seat 7. The overall structure is compact and easy to assemble.

[0037] There are two adjustment knobs 6, which are respectively arranged symmetrically on both sides of the sliding seat 7; the two sides of the outer shell 1 are respectively provided with knob sliding holes 12, and the two adjustment knobs 6 are respectively inserted into the corresponding knob sliding holes 12; the limiting block 61, the compression spring 71 and the gear limiting rail 13 are each set in two groups; only when the two adjustment knobs 6 are pressed at the same time, so that the two limiting blocks 61 overcome the force of the corresponding compression spring 71 and disengage from the corresponding limiting groove 131, can the sliding seat 7 slide along the axial direction of the transmission shaft 2 to adjust the distance between the two massage arms 4.

[0038] This design requires that the unlocking action must be completed by pressing both sides simultaneously, which can effectively avoid accidental locking caused by accidental touch on one side or by chance, and further improve the anti-accidental touch performance. At the same time, the symmetrical arrangement on both sides makes the sliding seat 7 more evenly stressed, less prone to tilting during sliding, smoother adjustment process, and more reliable locking state.

[0039] The adjustment knob 6 includes an insert plate 62 and a toggle block 63 connected to the insert plate 62. The insert plate 62 is inserted into the sliding seat 7 and is confined within the knob sliding hole 12. The limiting block 61 is fixed or integrally disposed on the insert plate 62. The toggle block 63 is slidably disposed within the knob sliding hole 12 and partially protrudes from the outer surface of the outer shell 1. This structure enables the adjustment knob 6 to simultaneously possess the functions of insert linkage, limit locking, and external pressing operation. The structure is simple and compact, and easy to manufacture and assemble. The insertion of the insert plate 62 into the sliding seat 7 ensures reliable linkage between the knob and the sliding seat 7. The limiting block 61 cooperates with the gear limit track 13 to achieve stable locking. The protruding toggle block 63 facilitates user pressing and toggling, thereby improving the convenience and reliability of the adjustment operation.

[0040] The output shaft of the drive motor 3 is connected to the transmission shaft 2 via a gear set 8. The gear set 8 has the advantages of smooth transmission, reliable torque transmission, and mature structure, and can provide stable power to the transmission shaft 2 and the eccentric bushing 5 on it, thereby ensuring that the massage arm 4 swings back and forth stably along a predetermined trajectory.

[0041] The outer casing 1 includes a movement receiving head 14 and a grip handle 15. The grip handle 15 extends from the movement receiving head 14 and forms a crank structure. One end of the movement receiving head 14 is provided with an opening, and a flexible cover plate 16 is connected to the opening. Two sets of movable holes 11 are provided and symmetrically opened on the flexible cover plate 16.

[0042] This structure makes the massager more ergonomically designed for the neck and shoulder area and user grip habits. The handle structure facilitates user grip and positioning. The flexible cover 16 enhances comfort and fit when in contact with the body, while the symmetrically arranged movable holes 11 facilitate the stable extension and reciprocating swing of the pair of massage arms 4, ensuring reliable massage action. Alternatively, the cover can be made of a rigid material, such as hard plastic, metal, or other rigid materials with sufficient structural strength. When the cover is made of a rigid material, to ensure the massage arms 4 can swing back and forth normally and move axially along the drive shaft 2 for spacing adjustment, the diameter of the movable hole 11 can be set larger than the outer diameter of the massage arms 4 passing through the movable hole 11, creating sufficient swing and axial movement clearance between the inner wall of the movable hole 11 and the massage arms 4. Preferably, the movable hole 11 can be a round hole, an oblong hole, an elliptical hole, or a strip-shaped hole. More preferably, the movable hole 11 is an oblong hole or an oblong hole, extending along the axial direction of the drive shaft 2.

[0043] The outer wall of the eccentric bushing 5 is provided with an annular inclined groove 51, and one end of the massage clamping arm 4 is provided with a sleeve part 41, which is movably fitted into the annular inclined groove 51. Through the cooperation of the annular inclined groove 51 and the sleeve part 41, the rotational motion of the eccentric bushing 5 can be converted into the reciprocating swing or clamping motion of the massage clamping arm 4. The structure is simple, the motion is reliable, and the transmission efficiency is high. The sleeve part 41 is movably fitted into the annular inclined groove 51, which can reduce jamming and wear during the movement, making the movement of the massage clamping arm 4 smoother and more stable, thereby improving the massage effect and service life.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the utility model as defined by the appended claims and their equivalents.

Claims

1. A shoulder and neck massager, comprising a housing (1), a drive shaft (2), a drive motor (3), and a pair of massage arms (4), wherein the drive shaft (2) is rotatably disposed within the housing (1) and is connected to the drive motor (3) via transmission; a pair of eccentric bushings (5) are disposed on the drive shaft (2), each eccentric bushing (5) being circumferentially linked with the drive shaft (2), and at least one eccentric bushing (5) being axially movable relative to the drive shaft (2); one end of each massage arm (4) is movably sleeved on the corresponding eccentric bushing (5), and the other end extends to the outside through a movable hole (11) in the housing (1), and reciprocates relative to the movable hole (11) as the eccentric bushing (5) rotates; characterized in that, An adjustment knob (6) is provided on the outer shell (1), and the adjustment knob (6) is linked to the axially movable eccentric bushing (5); a press-to-unlock mechanism is provided between the adjustment knob (6) and the outer shell (1); when the adjustment knob (6) is pressed, it is unlocked, and when it slides along the drive shaft (2) after unlocking, it drives the eccentric bushing (5) to move along the drive shaft (2) axially, thereby driving the corresponding massage arm (4) to move axially relative to the drive shaft (2) to adjust the distance between the two massage arms (4).

2. The shoulder and neck massager according to claim 1, characterized in that: The outer casing (1) has a toggle hole (12), and the adjustment knob (6) passes through the toggle hole (12) and can slide along the toggle hole (12); a sliding seat (7) is provided inside the outer casing (1), and the sliding seat (7) is slidably disposed inside the outer casing (1) along the axial direction of the transmission shaft (2), and sleeved on one of the eccentric bushings (5); the eccentric bushing (5) is circumferentially rotated and axially limited to the sliding seat (7), so that the eccentric bushing (5) can rotate circumferentially relative to the sliding seat (7), and moves axially synchronously with the sliding seat (7) when the sliding seat (7) moves axially along the transmission shaft (2); the adjustment knob (6) is linked to the sliding seat (7), and the adjustment knob (6) drives the sliding seat (7) to move axially along the transmission shaft (2) when it is unlocked.

3. The shoulder and neck massager according to claim 2, characterized in that: The adjustment knob (6) is inserted into the sliding seat (7), and a compression spring (71) is provided between the sliding seat (7) and the adjustment knob (6). The press-to-unlock mechanism includes a limiting block (61) provided on the adjustment knob (6) and a gear limiting track (13) provided in the housing (1) and extending along the sliding direction of the adjustment knob (6). The gear limiting track (13) has multiple limiting grooves (131). When the adjustment knob (6) is pressed, the limiting block (61) overcomes the force of the compression spring (71) and disengages from the limiting groove (131) to unlock. After the adjustment knob (6) is released, under the action of the compression spring (71), the limiting block (61) is engaged in the corresponding limiting groove (131) to relock.

4. The shoulder and neck massager according to claim 2 or 3, characterized in that: The sliding seat (7) includes a sliding frame (72) and a seat ring (73). The sliding frame (72) is slidably disposed in the housing (1) along the axial direction of the transmission shaft (2) and has a slot (721) for the adjustment knob (6) to be inserted and fitted. The seat ring (73) is connected to the sliding frame (72) and is sleeved on the outside of the eccentric bushing (5). The seat ring (73) has a mounting hole (731), and the outer wall of the eccentric bushing (5) is circumferentially rotated with the mounting hole (731).

5. The shoulder and neck massager according to claim 3, characterized in that: There are two adjustment knobs (6), which are respectively set on both sides of the sliding seat (7) and arranged symmetrically. The two sides of the outer shell (1) are respectively provided with knob sliding holes (12), and the two adjustment knobs (6) are respectively inserted into the corresponding knob sliding holes (12). The limiting block (61), the compression spring (71) and the gear limiting track (13) are respectively set in two sets. Only when the two adjustment knobs (6) are pressed at the same time, so that the two limiting blocks (61) overcome the force of the corresponding compression spring (71) and disengage from the corresponding limiting groove (131), can the sliding seat (7) slide along the drive shaft (2) axially to adjust the distance between the two massage arms (4).

6. The shoulder and neck massager according to claim 3, characterized in that: The adjustment knob (6) includes an insert plate (62) and a toggle block (63) connected to the insert plate (62). The insert plate (62) is inserted into the sliding seat (7) and the insert plate (62) is limited to the inside of the knob sliding hole (12). The limiting block (61) is fixed or integrally disposed on the insert plate (62). The toggle block (63) is slidably disposed in the knob sliding hole (12) and part of the toggle block (63) protrudes from the outer surface of the outer shell (1).

7. The shoulder and neck massager according to claim 1, characterized in that: The output shaft of the drive motor (3) is connected to the transmission shaft (2) via a gear set (8).

8. The shoulder and neck massager according to claim 1, characterized in that: The outer casing (1) includes a movement receiving head (14) and a grip handle (15). The grip handle (15) extends from the movement receiving head (14) and forms a crank structure. One end of the movement receiving head (14) is provided with an opening, and a flexible cover plate (16) is connected to the opening. Two sets of movable holes (11) are provided and symmetrically opened on the flexible cover plate (16).

9. The shoulder and neck massager according to claim 1, characterized in that: The outer wall of the eccentric bushing (5) is provided with an annular inclined groove (51), and one end of the massage clamp arm (4) is provided with a sleeve part (41), which is movably sleeved in the annular inclined groove (51).

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