Reciprocating motion structure of neck massager

Abstract

The application discloses a reciprocating motion structure of a neck massager, which comprises a V-shaped main body shell, a second shell, a moving guide rail, a moving group, a first driving mechanism and a second driving mechanism, and adopts a scheme in which a screw rod transmission is used instead of a belt transmission. The screw rod is directly assembled and fixed with an adjusting motor gear group and a massage group. The adjusting motor gear group can realize the translational motion of the massage group by adjusting the rotation of the screw rod. Only two screw rods can replace a plurality of belt pulleys, a plurality of belts and a locking assembly of the massage group and the belts. The reciprocating screw rod structure is used, so that the reciprocating motion of the massage group can be realized under the condition that the adjusting motor rotates in one direction, the driving control is simplified, the motor can rotate in one direction all the time, the motor loss is reduced, and the service life of the motor is prolonged. Since the motor continuously moves all the time, it is not necessary to start and stop, the massage group can continuously move, there is no feeling of stagnation in the massage process, and better massage experience is provided.

Description

Technical Field

[0001] This invention relates to the field of massage device technology, and more particularly to a reciprocating motion structure for a neck massager. Background Technology

[0002] The existing technology uses an adjustable motor located in the middle of the massager, two massage components, and a synchronous belt with limit switches. The output shaft of the adjustable motor is equipped with a synchronous belt gear, which drives the synchronous belt to rotate. The massage components are locked and positioned on the synchronous belt by a toothed belt locking assembly and reciprocate with the synchronous belt. A micro switch is set at the travel limit position of the massage component, and each triggering of the micro switch reverses the reciprocating motion of the massage component.

[0003] Furthermore, existing massagers have a large number of parts and a complex structure; they use multiple pulleys, multiple belts, multiple limit switches and toothed belt locks, resulting in a large number of parts, high assembly requirements, complex body structure and high overall cost. Summary of the Invention

[0004] The purpose of this invention is to provide a reciprocating motion structure for a neck massager.

[0005] To achieve the above objectives, the present invention adopts the following solution:

[0006] A reciprocating motion structure for a neck massager includes a V-shaped main body shell, with a second shell communicating with the top of the V-shaped main body shell.

[0007] The movable guide rails are respectively provided on the outer walls of both sides of the V-shaped main body shell. The two movable guide rails extend outward in a figure-eight shape. The movable guide rails are provided with guide grooves that pass through the upper and lower ends of the movable guide rails.

[0008] A movable assembly includes a slider and a lead screw. A sliding cavity is provided on the movable guide rail. The slider is disposed in the sliding cavity. A first through hole is provided laterally on the slider. The lead screw is rotatably disposed in the sliding cavity and passes through the first through hole. One end of the lead screw extends into the V-shaped main body shell. A reciprocating mechanism is provided in the slider to drive the slider to reciprocate along the lead screw.

[0009] The first drive mechanism consists of a first drive motor and a first transmission gear set. The first drive motor is located inside the second housing and its rotating end extends into the V-shaped main housing. The first transmission gear set is located inside the second housing. The rotating end of the first drive motor can synchronously drive two lead screws to rotate through the first transmission gear set.

[0010] As a further embodiment of this utility model, the lead screw is a reciprocating lead screw.

[0011] As a further embodiment of this utility model, the slider includes a slider housing disposed in a sliding cavity, guide blocks are symmetrically provided at the upper and lower ends of the slider housing, the guide blocks are fitted in guide grooves, an inner block is wrapped inside the slider housing, the first through hole passes through the slider housing and the inner block in sequence, and a second through hole is provided at one end of the slider that passes through one end of both the slider housing and the inner block in sequence.

[0012] As a further embodiment of this utility model, guide blocks are symmetrically provided at the upper and lower ends of the slider, and a second through hole is provided on the slider that can penetrate one end of the slider and communicate perpendicularly with the first through hole.

[0013] As a further embodiment of this utility model, the reciprocating mechanism includes a cylindrical block assembled in the second through hole, a swing shaft rotatably provided at one end of the cylindrical block located in the inner block, an arc-shaped block that can be connected to the lead screw fixed at one end of the swing shaft, and an arc-shaped surface at one end of the arc-shaped block that can fit with the inner diameter of the thread of the lead screw.

[0014] As a further embodiment of this utility model, the reciprocating mechanism includes an arc-shaped block disposed in a second through hole. One end of the arc-shaped block is provided with an arc-shaped surface that can fit with the inner diameter of the lead screw thread. An internal thread is provided on the inner wall of the second through hole, and a screw is threaded onto the internal thread to keep the arc-shaped surface always in contact with the inner diameter of the lead screw thread.

[0015] As a further embodiment of this utility model, a coaxial threaded hole is provided on one side of the slider housing and the inner block, the threaded hole is connected to the second through hole, and the slider housing, the inner block and the cylindrical block are connected by screws.

[0016] As a further embodiment of this utility model, the first transmission gear set includes a first screw fixed on the rotating shaft of the first drive motor, a first gear is provided at one end of the screw located inside the V-shaped main body shell, a first gear shaft is provided between the first gear and the first screw, the first gear shaft is rotatably disposed on the inner wall of the V-shaped main body shell, and a first double-layer gear that can mesh with the first screw and the first gear is installed on the first gear shaft.

[0017] As a further embodiment of this utility model, the large gear of the first double-layer gear meshes with the first screw, and the small gear of the first double-layer gear meshes with the first gear.

[0018] As a further embodiment of this utility model, the first transmission gear set includes a first bevel gear fixed on the rotating shaft of the first drive motor, and a second bevel gear that can mesh with the first bevel gear is fixed at one end of the lead screw located inside the V-shaped main body shell.

[0019] As a further embodiment of this utility model, at least one guide post is symmetrically provided at both the upper and lower ends of the slider, and the guide post is fitted into the guide groove.

[0020] As a further embodiment of this utility model, the lead screw is a one-way lead screw.

[0021] As a further embodiment of this utility model, an internal thread is provided on the inner wall of the first through hole, which can be connected to the lead screw thread.

[0022] As a further embodiment of this utility model, a third housing is provided on one side of each of the two sliders that are close to each other. A drive shaft that can be connected to the massage part is provided on the third housing in a laterally rotatable manner. One end of the drive shaft extends out of the third housing, and a reduction gear set that can rotate the drive shaft is provided inside the third housing.

[0023] In summary, the beneficial effects of the invention compared to the prior art are:

[0024] A screw drive system is used instead of a belt drive. The screw is directly assembled and fixed to the adjusting motor gear set and the massage assembly. The adjusting motor gear set can realize the translational movement of the massage assembly by adjusting the rotation of the screw. Only two screws are needed to replace multiple pulleys, multiple belts, and the locking assembly between the massage assembly and the belt, which greatly reduces the manufacturing and assembly costs of the product.

[0025] The use of a reciprocating screw structure allows the massage unit to reciprocate even when the adjusting motor is rotating in one direction. Reciprocating screw drive is a transmission method that enables the slider to reciprocate without changing the direction of the main shaft rotation. When applied to the reciprocating motion of a massager, it eliminates the need for limit switches at the travel limits, simplifying drive control; the motor can rotate continuously in one direction, reducing motor wear and increasing motor life; and because the motor operates continuously without the need for start-stop cycles, the massage unit can move continuously, providing a smooth massage experience without any jerking. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the internal structure of the V-shaped main body shell in this invention.

[0027] Figure 2 This is a schematic diagram of the internal structure of the third outer shell in this invention.

[0028] Figure 3 This is an exploded view of the present invention.

[0029] Figure 4 This is a cross-sectional view of the present invention.

[0030] Figure 5 For the present invention Figure 1 A magnified view of point A.

[0031] Figure 6 This is a structural view of one embodiment of the first transmission gear set in this invention.

[0032] Figure 7 This is a structural view of one embodiment of the lead screw and slider in this invention.

[0033] Figure 8 This is an exploded view of one embodiment of the reciprocating mechanism in this invention.

[0034] Figure 9 This is a cross-sectional view of one embodiment of the reciprocating mechanism in this invention.

[0035] Figure 10 This is a structural view of one embodiment of the guide block in this invention.

[0036] Figure 11 This is a structural view of one embodiment of the guide post in this invention.

[0037] Explanation of reference numerals in the attached drawings: 1. V-shaped main body shell; 2. Second shell; 20. Moving guide rail; 40. Moving assembly; 41. Slider; 42. Lead screw; 43. Sliding cavity; 44. First through hole; 60. Reciprocating mechanism; 70. First drive mechanism; 71. First drive motor; 72. First screw; 80. First transmission gear set; 41. Slider; 3. Third shell; 4. Drive shaft; 90. Second drive mechanism; 411. Slider shell; 412. Guide block; 413. Guide groove; 414. Inner block; 61. Second through hole; 62. Cylindrical block; 63. Swing shaft; 64. Arc-shaped block; 65. Arc-shaped surface; 415. Threaded hole; 300. Screw; 81. First gear; 82. First gear shaft; 83. First double-layer gear; 91. Second drive motor; 92. Second screw; 100. Second transmission gear set; 101. Second gear; 102. Second gear shaft; 103. Third gear shaft; 104. Second double-layer gear; 105. Third double-layer gear; 201. Spline groove; 202. Bolt hole; 400. Convex surface; 300. Screw; 811. First bevel gear; 812. Second bevel gear; 4121. Guide post. Detailed Implementation

[0038] The following detailed description provides various embodiments or examples for carrying out the invention. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0039] Furthermore, spatial terms may be used, such as “below,” “lower,” “from the inside out,” “above,” “upper,” and similar terms. These relational terms are used to facilitate the description of the relationship between some elements or features in the figures and other elements or features. These spatial relational terms include different orientations of the device in use or operation, as well as the orientations described in the figures. The device may be turned to different orientations, degrees of rotation, or other orientations, and the spatially related adjectives used therein can be interpreted in the same way. Therefore, they should not be construed as limiting the invention. The terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as “first” or “second” may explicitly or implicitly include one or more of that feature.

[0040] The invention will be further described below with reference to the accompanying drawings and specific embodiments: Figures 1 to 11 The reciprocating motion structure of the neck massager shown includes a V-shaped main body shell 1, and a second shell 2 communicating with the top of the V-shaped main body shell 1.

[0041] The movable guide rail 20 is provided on the outer walls of both sides of the V-shaped main body shell 1. The two movable guide rails 20 extend outward in a figure-eight shape. The movable guide rail 20 is provided with a guide groove 413 that passes through the upper and lower ends of the movable guide rail 20.

[0042] The movable assembly 40 includes a slider 41 and a lead screw 42. A sliding cavity 43 is provided on the movable guide rail 20. The slider 41 is disposed in the sliding cavity 43. A first through hole 44 is provided laterally on the slider 41. The lead screw 42 is rotatably disposed in the sliding cavity 43 and passes through the first through hole 44. One end of the lead screw 42 extends into the V-shaped main body shell 1. A reciprocating mechanism 60 is provided in the slider 41 to drive the slider 41 to reciprocate along the lead screw 42.

[0043] The first drive mechanism 70 consists of a first drive motor 71 and a first transmission gear set 80. The first drive motor 71 is located inside the second housing 2 and its rotating end extends into the V-shaped main housing 1. The first transmission gear set 80 is provided inside the second housing 2. The rotating end of the first drive motor 71 can synchronously drive the two lead screws 42 to rotate through the first transmission gear set 80.

[0044] like Figure 1-6 The following is an embodiment of the lead screw 42: the lead screw 42 is a reciprocating lead screw. The reciprocating lead screw only needs the motor to rotate in one direction to make the lead screw 42 drive the slider 41 to perform reciprocating motion.

[0045] like Figure 1-5The diagram shows one embodiment of the slider 41: The slider 41 includes a slider housing 411 disposed within a sliding cavity 43. Guide blocks 412 are symmetrically arranged at the upper and lower ends of the slider housing 411, and the guide blocks 412 are fitted into guide grooves 413. An inner block 414 is enclosed within the slider housing 411. A first through hole 44 passes through the slider housing 411 and the inner block 414 sequentially. A second through hole 61 is provided at one end of the slider 41, which simultaneously passes through one end of the slider housing 411 and the inner block 414 sequentially. The main body of the slider 41 consists of two parts: the slider housing 411 and the inner block 414. This is to facilitate the replacement of damaged parts, because the slider housing 411 needs to move along the sliding cavity 43 for a long time during the massage process, and the surface of the slider housing 411 will be damaged due to long-term friction. By dividing the main body of the slider 41 into the slider housing 411 and the inner block 414, only the slider housing 411 needs to be replaced during maintenance, reducing maintenance costs.

[0046] like Figure 8-10 The following is an embodiment of the slider 41: guide blocks 412 are symmetrically provided at the upper and lower ends of the slider 41, and a second through hole 61 is provided on the slider 41 that can penetrate one end of the slider 41 and is perpendicularly connected to the first through hole 44. The slider 41 is made into a whole without separating the slider shell 411 and the inner block 414. The advantage of doing so is that the structure is simple and the production cost is low.

[0047] like Figure 3-5 The following is an embodiment of the reciprocating mechanism 60: The reciprocating mechanism 60 includes a cylindrical block 62 assembled in the second through hole 61. A swing shaft 63 is rotatably provided at one end of the cylindrical block 62 located in the inner block 414. An arc-shaped block 64 that can be connected to the lead screw 42 is fixed at one end of the swing shaft 63. An arc-shaped surface 65 that can fit with the inner diameter of the thread of the lead screw 42 is provided at one end of the arc-shaped block 64. When the arc-shaped block 64 moves to one end of the thread of the reciprocating lead screw 42, the convex surfaces 400 at both ends of the reciprocating lead screw 42 that are connected to the thread will squeeze the arc-shaped block 64 to rotate the swing shaft 63. This causes the arc-shaped block 64 to switch to another thread on the reciprocating lead screw 42, thereby causing the arc-shaped block 64 to move the slider 41 in the opposite direction. The above actions are repeated continuously, thereby causing the slider 41 to move back and forth.

[0048] like Figure 8-9The following is an embodiment of the reciprocating mechanism 60: The reciprocating mechanism 60 includes an arc-shaped block 64 disposed in a second through hole 61. One end of the arc-shaped block 64 is provided with an arc-shaped surface 65 that can fit with the inner diameter of the thread of the lead screw 42. An internal thread is provided on the inner wall of the second through hole 61. A screw 300 is threaded onto the internal thread to keep the arc-shaped surface 65 always in contact with the inner diameter of the thread of the lead screw 42. The screw 300 can ensure that the cylindrical block does not loosen during the large relative movement between the rotating shaft and the cylindrical block, and always presses against the rotating shaft.

[0049] like Figure 3-5 The following is an embodiment of the slider housing 411: a coaxial threaded hole 415 is provided on one side of the slider housing 411 and the inner block 414. The threaded hole 415 communicates with the second through hole 61. The slider housing 411, the inner block 414 and the cylindrical block 62 are connected by screws. This is also for the convenience of maintenance, because the arc block 64 is also a vulnerable part in the reciprocating motion of the massager. In order to reduce maintenance costs, the slider housing 411, the inner block 414 and the cylindrical block 62 are made into a detachable state.

[0050] like Figure 1-5 The following is an embodiment of the first transmission gear set 80: The first transmission gear set 80 includes a first screw 72 fixed on the rotating shaft of the first drive motor 71, a first gear 81 is provided at one end of the lead screw 42 located inside the V-shaped main body shell 1, a first gear shaft 82 is provided between the first gear 81 and the first screw 72, the first gear shaft 82 is rotatably disposed on the inner wall of the V-shaped main body shell 1, and a first double-layer gear 83 is installed on the first gear shaft 82, which can mesh with the first screw 72 and the first gear 81 respectively.

[0051] like Figure 1-5 The following is an embodiment of the first transmission gear set 80: the large gear of the first double-layer gear 83 meshes with the first screw 72, and the small gear of the first double-layer gear 83 meshes with the first gear 81.

[0052] like Figure 6 The following is an embodiment of the first transmission gear set 80: The first transmission gear set 80 includes a first bevel gear 811 fixed on the rotating shaft of the first drive motor 71, and a second bevel gear 812 that can mesh with the first bevel gear 811 is fixed at one end of the lead screw 42 located inside the V-shaped main body shell 1.

[0053] like Figure 11 The following is an embodiment of the slider 41: at least one guide post 4121 is symmetrically provided at both the upper and lower ends of the slider 41, and the guide post 4121 is fitted into the guide groove 413.

[0054] like Figure 7The diagram shows one embodiment of the lead screw 42: the lead screw 42 is a one-way lead screw.

[0055] like Figure 7 The following is an embodiment of the lead screw 42: an internal thread is provided on the inner wall of the first through hole 44, which can be threadedly connected to the lead screw 42. The lead screw 42 is a one-way lead screw, which has the advantages of simple structure and low production cost. However, in this case, the motor is a servo motor that can change the rotation direction. For example, the motor rotation time is set, and when the time is up, the rotation direction of the motor is changed, thereby controlling the rotation direction of the lead screw 42, so that the slider 41 reciprocates along the lead screw 42.

[0056] like Figure 1-5 The following is an embodiment of the reduction gear set 90: a third housing 3 is provided on one side of each of the two sliders 41 that are close to each other. A drive shaft 4 that can be connected to the massage part is provided on the third housing 3 in a laterally rotatable manner. One end of the drive shaft 4 extends out of the third housing 3. A reduction gear set 90 that can make the drive shaft 4 rotate is provided inside the third housing 3.

[0057] The second drive mechanism 90 consists of a second drive motor 91, a second screw 92, and a second transmission gear set 100. The second drive motor 91 is located above the drive shaft 4 and is horizontally fixed on the inner wall of the third housing 3. The second screw 92 is fixed on the rotating shaft of the second drive motor 91. A second transmission gear set 100 is provided on the inner wall of the third housing 3 to enable the drive shaft 4 to rotate synchronously with the second drive motor 91.

[0058] The second transmission gear set 100 includes a second gear 101 fixed on the drive shaft 4. A second gear shaft 102 and a third gear shaft 103 are sequentially arranged on the inner wall of the third housing 3 between the second gear 101 and the second screw 92. A second double-layer gear 104 that can mesh with the second screw 92 is provided on the second gear shaft 102. A third double-layer gear 105 that can mesh with the second double-layer gear 104 and the second gear 101 is provided on the third gear shaft 103.

[0059] The large gear of the second double-layer gear 104 meshes with the second screw 92, the small gear of the second double-layer gear 104 meshes with the large gear of the third double-layer gear 105, and the small gear of the third double-layer gear 105 meshes with the second gear 101.

[0060] The drive shaft 4 is provided with a spline groove 201 for connecting to the massage part, and one end of the drive shaft 4 is provided with a bolt hole 202 for connecting to the massage part.

[0061] In use: The purpose of this invention is to replace the traditional belt drive with a multi-screw 42 transmission structure. This way, the massager will not experience the same problem as a belt drive, where the belt ages quickly and has a high risk of failure under fluctuating loads. During the operation of the massager, the belt is in a working environment with constantly fluctuating loads, making it more prone to aging, stripping, and loss of teeth, which in turn leads to a high risk of functional failure.

[0062] Furthermore, belt drives require constant starting and stopping to change the direction of motor rotation during reciprocating motion. This frequent starting and stopping of the motor leads to high energy consumption, short motor life, and low efficiency. Massage components require the belt to frequently rotate in both directions during reciprocating motion, thus requiring the motor to be frequently started and stopped. Frequent starting and stopping of the motor significantly reduces its lifespan, results in high energy loss, and low working efficiency.

[0063] The reciprocating screw 42 transmission structure can eliminate many parts, such as belts, pulleys, limit switches, and toothed belt locks. Furthermore, the motor does not need to stop or change its rotation direction when the massager is moving back and forth, effectively improving the motor's service life.

[0064] A screw drive system is used instead of a belt drive. The screw is directly assembled and fixed to the adjusting motor gear set and the massage assembly. The adjusting motor gear set can realize the translational movement of the massage assembly by adjusting the rotation of the screw. Only two screws are needed to replace multiple pulleys, multiple belts, and the locking assembly between the massage assembly and the belt.

[0065] The first drive motor 71 is located in the middle of the V-shaped main body shell 1. Two sets of first transmission gear sets 80 are used in the V-shaped main body shell 1 to control the rotation of the reciprocating screw 42. This greatly reduces the number of parts and simplifies the structure of the massager. This will reduce assembly costs and parts costs. Moreover, the reciprocating screw 42 will not easily lose its elasticity and surface wear like a belt, thus preventing slippage.

[0066] The main body of slider 41 consists of two parts: slider shell 411 and inner block 414. This is to facilitate the replacement of damaged parts. Because slider shell 411 needs to move along sliding cavity 43 for a long time during the massage process, the surface of slider shell 411 will be damaged due to long-term friction. By dividing the main body of slider 41 into slider shell 411 and inner block 414, only slider shell 411 needs to be replaced during maintenance, thus reducing maintenance costs.

[0067] When the arc block 64 moves to one end of the thread of the reciprocating screw 42, the convex surface 400 connected to the thread at both ends of the reciprocating screw 42 will squeeze the arc block 64 to rotate the swing shaft 63, thereby switching the arc block 64 to another thread on the reciprocating screw 42, so that the arc block 64 moves the slider 41 in the opposite direction, and repeats the above action continuously, so that the slider 41 moves back and forth left and right.

[0068] Spline groove 201 is used for positioning and to prevent slippage after the massage unit is connected. Bolt hole 202 is used to mount the massage unit onto drive shaft 4 with bolts.

[0069] The foregoing has shown and described the basic principles, main features, and advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection of the invention is defined by the appended claims and their equivalents.

Claims

1. A reciprocating motion structure for a neck massager, comprising a V-shaped main body shell (1), and a second shell (2) communicating with the top of the V-shaped main body shell (1), characterized in that: Movable guide rail (20) is provided on the outer walls of both sides of the V-shaped main body shell (1). The two movable guide rails (20) extend outward in a figure-eight shape. A guide groove (413) is provided on the movable guide rail (20) through the upper and lower ends of the movable guide rail (20). The moving assembly (40) includes a slider (41) and a lead screw (42). A sliding cavity (43) is provided on the moving guide rail (20). The slider (41) is disposed in the sliding cavity (43). A first through hole (44) is provided laterally on the slider (41). The lead screw (42) is rotatably disposed in the sliding cavity (43) and passes through the first through hole (44). One end of the lead screw (42) extends into the V-shaped main body shell (1). A reciprocating mechanism (60) is provided in the slider (41) to drive the slider (41) to reciprocate along the lead screw (42). The first drive mechanism (70) consists of a first drive motor (71) and a first transmission gear set (80). The first drive motor (71) is located inside the second housing (2) and its rotating end extends into the V-shaped main housing (1). The first transmission gear set (80) is located inside the second housing (2). The rotating end of the first drive motor (71) can synchronously drive the two lead screws (42) to rotate through the first transmission gear set (80).

2. The reciprocating motion structure of a neck massager according to claim 1, characterized in that, The lead screw (42) is a reciprocating lead screw.

3. The reciprocating motion structure of a neck massager according to claim 2, characterized in that, The slider (41) includes a slider housing (411) disposed in a sliding cavity (43). Guide blocks (412) are symmetrically provided at the upper and lower ends of the slider housing (411). The guide blocks (412) are fitted in the guide groove (413). An inner block (414) is wrapped inside the slider housing (411). The first through hole (44) passes through the slider housing (411) and the inner block (414) in sequence. A second through hole (61) is provided at one end of the slider (41) and passes through one end of the slider housing (411) and the inner block (414) in sequence.

4. The reciprocating motion structure of a neck massager according to claim 2, characterized in that, Guide blocks (412) are symmetrically provided at the upper and lower ends of the slider (41), and a second through hole (61) is provided on the slider (41) that can penetrate one end of the slider (41) and is perpendicularly connected to the first through hole (44).

5. The reciprocating motion structure of a neck massager according to claim 3 or 4, characterized in that, The reciprocating mechanism (60) includes a cylindrical block (62) assembled in the second through hole (61). A swing shaft (63) is rotatably provided at one end of the cylindrical block (62) located in the inner block (414). An arc-shaped block (64) that can be connected to the lead screw (42) is fixed at one end of the swing shaft (63). An arc-shaped surface (65) that can fit with the inner thread diameter of the lead screw (42) is provided at one end of the arc-shaped block (64).

6. The reciprocating motion structure of a neck massager according to claim 3 or 4, characterized in that, The reciprocating mechanism (60) includes an arc-shaped block (64) disposed in the second through hole (61). One end of the arc-shaped block (64) is provided with an arc-shaped surface (65) that can fit with the inner diameter of the thread of the lead screw (42). An internal thread is provided on the inner wall of the second through hole (61), and a screw (300) is threaded on the internal thread to keep the arc-shaped surface (65) always in contact with the inner diameter of the thread of the lead screw (42).

7. The reciprocating motion structure of a neck massager according to claim 3, characterized in that, A coaxial threaded hole (415) is provided on one side of the slider housing (411) and the inner block (414). The threaded hole (415) communicates with the second through hole (61). The slider housing (411), the inner block (414) and the cylindrical block (62) are connected by screws.

8. The reciprocating motion structure of a neck massager according to claim 1, characterized in that, The first transmission gear set (80) includes a first screw (72) fixed on the rotating shaft of the first drive motor (71). A first gear (81) is provided at one end of the lead screw (42) inside the V-shaped main body shell (1). A first gear shaft (82) is provided between the first gear (81) and the first screw (72). The first gear shaft (82) is rotatably mounted on the inner wall of the V-shaped main body shell (1). A first double-layer gear (83) is installed on the first gear shaft (82) and can mesh with the first screw (72) and the first gear (81) respectively.

9. The reciprocating motion structure of a neck massager according to claim 8, characterized in that, The large gear of the first double-layer gear (83) meshes with the first screw (72), and the small gear of the first double-layer gear (83) meshes with the first gear (81).

10. The reciprocating motion structure of a neck massager according to claim 1, characterized in that, The first transmission gear set (80) includes a first bevel gear (811) fixed on the rotating shaft of the first drive motor (71), and a second bevel gear (812) that can mesh with the first bevel gear (811) is fixed at one end of the lead screw (42) inside the V-shaped main body shell (1).

11. The reciprocating motion structure of a neck massager according to claim 1, characterized in that, At least one guide post (4121) is symmetrically provided at both ends of the slider (41), and the guide post (4121) is fitted into the guide groove (413).

12. The reciprocating motion structure of a neck massager according to claim 1, characterized in that, The lead screw (42) is a one-way lead screw.

13. The reciprocating motion structure of a neck massager according to claim 12, characterized in that, An internal thread is provided on the inner wall of the first through hole (44) so ​​that it can be threadedly connected to the lead screw (42).

14. The reciprocating motion structure of a neck massager according to claim 1, characterized in that, A third housing (3) is provided on one side of each of the two sliders (41) and is located close to each other. A drive shaft (4) that can be connected to the massage part is provided on the third housing (3) and is laterally rotatable. One end of the drive shaft (4) extends out of the third housing (3). A reduction gear set (90) that can rotate the drive shaft (4) is provided inside the third housing (3).

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