An eccentric mechanism with adjustable amplitude and a massaging device

Abstract

The application discloses an eccentric wheel mechanism with adjustable amplitude and a massage device, which comprises a motor, an eccentric wheel assembly, a swing arm and a control assembly; the eccentric wheel assembly comprises an eccentric wheel, a center adjusting slider and an adjusting screw; the eccentric wheel and the swing arm are rotatably assembled on a first axis; the center adjusting slider, the control assembly and the motor are assembled on a second axis, and the eccentric wheel assembly is driven to rotate by the motor; the control assembly has a first state of being connected with the adjusting screw and a second state of being separated from the adjusting screw; in the first state, the control assembly drives the center adjusting slider to relatively move with the eccentric wheel to change the distance between the first axis and the second axis and change the amplitude of the swing arm. The eccentric wheel mechanism can adjust the eccentric distance and is applied to a fascia gun, so that the amplitude of the massage head of the fascia gun can be adjusted, that is, the massage depth is adjusted, and the use requirements of different users are met.

Description

Technical Field

[0001] This invention relates to the field of massager technology, and more specifically to an eccentric wheel mechanism with adjustable amplitude and a massage device. Background Technology

[0002] Fascial guns have become a popular massage product among consumers in recent years. Their main principle is to use a specially designed high-speed motor inside to drive the "gun head" to generate high-frequency vibrations that penetrate deep into the muscles, thereby reducing local tissue tension, relieving pain, and promoting blood circulation.

[0003] However, the eccentric distance of all fascia guns or massagers currently on the market is fixed and cannot be adjusted, which means that the massage amplitude cannot be adjusted. For different users, especially the elderly or those who are physically weak, they cannot adjust the massage amplitude according to their own condition, thus failing to achieve the best massage sensation and effect. For example, Chinese Patent No. 202123092596.7 discloses a fascia gun, relating to the field of massage devices, including a housing and a motor, massage head, and transmission assembly mounted on the housing. The transmission assembly includes a transmission rod and an eccentric wheel. The eccentric wheel is positioned above the motor and sleeved on the output end of the motor. The transmission rod is integrally formed and includes a long rod portion and a connecting portion. The front end of the long rod portion is connected to the massage head, and the rear end of the connecting portion rotates in cooperation with the eccentric wheel. Another example is Chinese Patent No. 202022717494.9, which discloses a fascia gun. When in use, the motor is activated, and the motor drives the eccentric wheel to rotate. The eccentric wheel drives the connecting rod and the connecting piece to perform horizontal reciprocating motion, thereby driving the massage head on the connecting piece to achieve horizontal reciprocating motion. In both of these patented technologies, the transmission rod is rotated solely by the eccentric wheel. However, the eccentric wheel and the transmission rod are not adjustable, meaning the vibration amplitude of the massage head is not adjustable and cannot meet different massage needs.

[0004] For the reasons mentioned above, in order to improve the comfort and practicality of the massager and meet the needs of different groups of people, the applicant has made improvements to the eccentric wheel mechanism in the existing technology. Summary of the Invention

[0005] In view of this, the present invention provides an eccentric wheel mechanism with adjustable amplitude and a massage device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an amplitude-adjustable eccentric wheel mechanism, comprising: a motor, an eccentric wheel assembly, a swing arm, and a control assembly; the eccentric wheel assembly comprises: an eccentric wheel, a center adjusting slider, and an adjusting screw; the eccentric wheel and the swing arm are rotatably assembled on a first axis; the center adjusting slider, the control assembly, and the motor are assembled on a second axis, and the eccentric wheel assembly is driven to rotate by the motor; the control assembly has a first state connected to the adjusting screw and a second state separated from the adjusting screw; in the first state, the control assembly drives the center adjusting slider and the eccentric wheel to move relative to each other through the adjusting screw, thereby changing the distance between the first axis and the second axis and changing the amplitude of the swing arm; the eccentric wheel mechanism with the above structure can be further... The adjustment of eccentricity is applied in massage devices, especially fascia guns, to adjust the amplitude of the fascia gun massage head, i.e., to adjust the massage depth, to meet the needs of different users. When adjusting the amplitude, by switching the control component to the first state, the control component drives the adjusting screw to rotate. Since the relative position between the central adjusting slider and the output shaft of the motor is fixed, the eccentric wheel is driven to move, adjusting the relative distance between the first axis and the second axis on the eccentric wheel assembly, thus achieving the purpose of adjusting the eccentricity. When the control component rotates clockwise, the adjusted amplitude increases; when the control component rotates counterclockwise, the adjusted amplitude decreases. After the amplitude adjustment is completed, the control component automatically switches to the second state (i.e., reset). The control component does not rotate synchronously with the motor and does not affect the operation of the eccentric wheel assembly.

[0007] In a further technical solution, a first shaft is provided on the central adjusting slider, which is coaxial with the second axis; the output shaft of the motor is fixedly connected to the first shaft; the adjusting screw is rotatably mounted on the eccentric wheel, and the adjusting screw is connected to the central adjusting slider, converting the curved rotation of the adjusting screw into the linear motion of the central adjusting slider on the eccentric wheel; the motor drives the eccentric wheel assembly to rotate synchronously, thereby transmitting the swing arm; if the second axis is defined as fixed, adjusting the position of the central adjusting slider on the eccentric wheel, then after the relative movement of the eccentric wheel, the distance between the first axis and the second axis on the eccentric wheel assembly is adjusted, that is, the amplitude of the swing arm is changed; by driving the eccentric wheel to move through the adjusting screw, the overall structure is compact and the adjustment method is simple.

[0008] In a further technical solution, the central adjusting slider and adjusting screw are both embedded in the eccentric wheel; the adjusting screw is provided with an adjusting gear, and the adjusting screw and the central adjusting slider are connected by a transmission screw sleeve; the relative movement direction of the eccentric wheel and the central adjusting slider is perpendicular to the second axis. During the relative movement of the eccentric wheel and the central adjusting slider, the distance between the first axis and the second axis can be adjusted, i.e., the eccentricity can be adjusted to achieve the purpose of adjusting the amplitude; and the specific structure and installation position of the central adjusting slider and the adjusting screw are defined, and the embedded assembly makes the assembly more stable, effectively saving height and reducing product volume.

[0009] In a further technical solution, the control component is assembled with the first shaft of the central adjusting slider, and the control component and the first shaft are connected by a first bearing, so that the control component does not rotate synchronously with the central adjusting slider; by setting the first bearing, the purpose of coaxially assembling the control component, the central adjusting slider, and the output shaft of the motor is achieved, but they do not rotate synchronously.

[0010] In a further technical solution, the control component includes: a rotating cap, a rotating cap positioning sleeve, a return spring, and a first bearing; the rotating cap, the rotating cap positioning sleeve, and the first bearing are sleeved together on a second axis; the rotating cap positioning sleeve is connected to the first shaft on the central adjusting slider through the first bearing; the rotating cap is sleeved outside the rotating cap positioning sleeve; the return spring is installed between the rotating cap and the rotating cap positioning sleeve and provides the force for the rotating cap to move upward relative to the rotating cap positioning sleeve; a gear is provided at the lower edge of the rotating cap; in the first state, when the rotating cap moves downward, the gear is connected to the adjusting gear on the adjusting screw; rotating the rotating cap drives the adjusting gear to rotate clockwise or counterclockwise, which can increase or decrease the amplitude; and the gear at the lower end of the rotating cap is arranged in a ring, so no matter what angle the eccentric wheel mechanism rotates to, the gear can mesh with the adjusting gear after the rotating cap moves downward, thereby driving the adjusting gear to rotate and achieving the purpose of adjusting the swing arm amplitude.

[0011] In a further technical solution, a damping ring is provided outside the rotating cap. The friction between the damping ring and the rotating cap is greater than the friction between the rotating cap positioning sleeve and the first bearing, which can achieve the purpose of controlling the component to not follow the rotation of the eccentric wheel assembly and the motor.

[0012] In a further technical solution, the rotating cap and the rotating cap positioning sleeve are connected by screws and can move up and down relative to each other. The return spring is connected to the inner wall of the rotating cap and one end wall of the rotating cap positioning sleeve. The above defines the specific structure between the rotating cap and the rotating cap positioning sleeve. The structure is simple and easy to assemble. When the control component switches between the first state and the second state, it is executed by the rotating cap moving up and down relative to the rotating cap positioning sleeve, so that the gear on the lower edge of the rotating cap can mesh or disengage with the adjusting gear to achieve the adjustment purpose. The structure is simple and easy to use.

[0013] In a further technical solution, a mounting ring is formed at the end of the swing arm, an eccentric wheel is installed in the mounting ring, the first axis passes through the center of the eccentric wheel, and the swing arm rotates around the center of the eccentric wheel.

[0014] In a further technical solution, a connecting component is installed at the front end of the swing arm, and the connecting component is connected to the massage head; the connecting component includes: a movable sleeve and a positioning sleeve, the movable sleeve being rotatably connected to the swing arm through a second bearing; the front end of the connecting component can be connected to different models of massage heads to achieve different massage functions.

[0015] In a further technical solution, the aforementioned adjustable eccentric wheel mechanism is installed inside the body, and the massage head is connected to the adjustable eccentric wheel mechanism to change the massage depth of the massage head.

[0016] The remaining beneficial technical effects of the present invention are reflected in the specific embodiments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an eccentric wheel mechanism;

[0019] Figure 2 This is a cross-sectional view of the eccentric wheel mechanism;

[0020] Figure 3 This is a partially exploded view of the eccentric wheel mechanism;

[0021] Figure 4 This is an exploded view of the eccentric wheel mechanism;

[0022] Figure 5 This is a schematic diagram of the eccentric wheel mechanism and the massage head assembly;

[0023] Figure 6 This is a schematic diagram of a massage device.

[0024] Explanation of reference numerals in the attached figures:

[0025] Motor 100 Output shaft 110 Motor bracket 120 Eccentric wheel assembly 200 Eccentric wheel 210 First mounting cavity 211 Second mounting cavity 212 Center adjustment slider 220 First axis 221 Transmission Screw Sleeve 222 Installation position 223 Linear slot 224 Adjusting screw 230 Adjusting gear 231 Thread section 232 300 swing arm Installation ring 310 Control component 400 First bearing 410 420 swivel cap Gear 421 Insert 422 430 swivel cap positioning sleeve Columnar groove 431 Return spring 440 Screw 450 Damping ring 460 Connection component 500 Activity Set 510 Second bearing 511 Second shaft 512 Positioning sleeve 520 Massage head 600 700 fuselage 710 Grip section 720 Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0027] In the description of this application, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] An eccentric wheel mechanism with adjustable amplitude; please refer to [link / reference]. Figure 1-4 As shown, it includes: a motor 100, an eccentric wheel assembly 200, a swing arm 300, and a control assembly 400.

[0030] The motor 100 is mainly used as a power source, and an output shaft 110 is provided on the motor 100; the eccentric wheel assembly 200 is installed on the output shaft 110 of the motor 100 and is driven to rotate by the motor 100, which in turn drives the swing arm 300 to swing.

[0031] The swing arm 300 is connected to the eccentric wheel assembly 200 and is driven by the eccentric wheel assembly 200 to swing. Under external constraints, the curvilinear motion of the eccentric wheel assembly 200 is converted into the linear telescopic movement of the swing arm 300, which is convenient for use on the fascia gun to massage the human body.

[0032] The swing arm 300 and the eccentric wheel assembly 200 are assembled on the first axis L1, and the swing arm 300 and the eccentric wheel assembly 200 are rotatably connected; while the eccentric wheel assembly 200 and the motor 100 are assembled on the second axis L2, the first axis L1 and the second axis L2 do not overlap, and an eccentric distance is formed between the first axis L1 and the second axis L2, which limits the amplitude of the swing arm 300; the traditional eccentric drive structure cannot adjust the amplitude of the swing arm 300 because the relative distance between the first axis L1 and the second axis L2 is fixed.

[0033] In this invention, a control component 400 is added, which can adjust the relative distance between the first axis L1 and the second axis L2 to adjust the amplitude of the swing arm 300.

[0034] Specifically, the eccentric wheel assembly 200, the motor 100 and the control component 400 are assembled in the direction of the second axis L2, and the motor 100 drives the eccentric wheel assembly 200 to rotate, but the control component 400 does not rotate with it.

[0035] The eccentric wheel assembly 200 includes an eccentric wheel 210, a center adjusting slider 220, and an adjusting screw 230. The center adjusting slider 220 and the adjusting screw 230 are both mounted on the eccentric wheel 210. The adjusting screw 230 is driven to rotate by the control assembly 400, which converts the curvilinear motion of the adjusting screw 230 into linear movement of the center adjusting slider 220 on the eccentric wheel 210, thereby achieving the purpose of adjusting the relative position between the center adjusting slider 220 and the eccentric wheel 210.

[0036] The central adjusting slider 220 is provided with a first shaft 221, which is coaxial with the second axis L2. The first axis L1 is fixed on the eccentric wheel 210. The relative movement direction between the central adjusting slider 220 and the eccentric wheel 210 is perpendicular to the second axis L2. Therefore, adjusting the relative position between the central adjusting slider 220 and the eccentric wheel 210 is equivalent to adjusting the distance between the first axis L1 and the second axis L2, thereby achieving the purpose of adjusting the amplitude of the swing arm 300.

[0037] Furthermore, in order to convert the curvilinear motion of the adjusting screw 230 into the linear movement of the central adjusting slider 220, an adjusting gear 231 is installed on the adjusting screw 230. The adjusting gear 231 is restricted to rotating on the eccentric wheel 210. When the adjusting gear 231 rotates, it drives the adjusting screw 230 to rotate.

[0038] The adjusting screw 230 has a threaded section 232 at its end, and a transmission sleeve 222 is provided inside the central adjusting slider 220. The threaded section 232 is connected to the transmission sleeve 222. When the adjusting screw 230 rotates, it pushes the central adjusting slider 220 to move. The adjusting screw 230 is perpendicular to the output shaft 110 of the motor 100 in spatial orientation. Figure 2 The output shaft 110 is vertically arranged, while the adjusting screw 230 is horizontally arranged. The first shaft 221 is also vertically arranged and coaxial with the motor shaft 110. A mounting position 223 for assembling the transmission screw sleeve 222 is provided on the side of the central adjusting slider 220. The adjusting gear 231 is vertically installed.

[0039] Specifically, please refer to Figure 2As shown, when the eccentric wheel mechanism is installed on the massage device, the position of the motor 100 is fixed, that is, the position of the second axis L2 is fixed, and the position of the center adjustment slider 220 is fixed. When the adjustment screw 230 rotates, since the position of the center adjustment slider 220 is fixed, the eccentric wheel 210 is moved accordingly.

[0040] like Figure 4 As shown, in order to reduce the overall height of the product, the eccentric wheel 210 is provided with a first mounting cavity 211 and a second mounting cavity 212. The center adjusting slider 220 is embedded in the first mounting cavity 211, and the adjusting screw 230 is embedded in the second mounting cavity 212. The threaded section 232 of the adjusting screw 230 extends into the first mounting cavity 211 and connects with the center adjusting slider 220. After the center adjusting slider 220 is installed, it can only move linearly within the first mounting cavity 211. At the same time, the first shaft 221 protrudes upward from the end face of the eccentric wheel 210. When the output shaft 110 of the motor 100 is connected to the first shaft 221, the motor 100 drives the eccentric wheel 210, the center adjusting slider 220, and the adjusting screw 230 to rotate synchronously.

[0041] The first mounting cavity 211 is provided with sufficient space for the eccentric wheel 210 and the center adjusting slider 220 to move relative to each other, and the center adjusting slider 220 will not leave the first mounting cavity 211 during the movement, ensuring the safety of use.

[0042] In addition, in order to guide the linear movement between the center adjusting slider 220 and the eccentric wheel 210, a guiding structure can be provided between them. For example, a linear groove 224 can be provided on the outer surface of the center adjusting slider 220, and a protrusion (not shown in the figure) can be provided on the inner wall of the first mounting cavity 211. Alternatively, a protrusion can be provided on the outer surface of the center adjusting slider 220, and a linear groove can be provided on the inner wall of the first mounting cavity 211.

[0043] In one embodiment, the control component 400 is assembled with the first shaft 221 of the center adjustment slider 220, and the control component 400 and the first shaft 221 are connected by a first bearing 410, so that the control component 400 can rotate synchronously with the center adjustment slider 220.

[0044] The control component 400 has a first state and a second state, such as Figure 1-2As shown, in the first state, the control component 400 is triggered to move downward and engage with the adjusting gear 231. When the control component 400 rotates, it can drive the adjusting gear 231 to rotate. The adjusting screw 230 rotates synchronously with the adjusting gear 231, thereby adjusting the relative position between the eccentric wheel 210 and the central adjusting slider 220 to change the distance between the first axis L1 and the second axis L2, and change the amplitude of the swing arm 300. In the second state, the control component 400 moves upward and does not engage with the adjusting gear 231. Even if the control component 400 rotates, it cannot drive the adjusting gear 231 to rotate.

[0045] Specifically, the control component 400 includes: a rotating cap 420, a rotating cap positioning sleeve 430, a return spring 440, and a first bearing 410;

[0046] A gear 421 is provided at the lower edge of the rotating cap 420. The gear 421 and the rotating cap 420 can be integrally formed or assembled separately. The teeth of the gear 421 are set downwards. When the rotating cap 420 moves down, it can mesh with the adjusting gear 231. When the rotating cap 420 rotates, the adjusting gear 231 is driven to rotate through the gear 421.

[0047] The gear 421 is a ring gear. Therefore, no matter what angle or position the eccentric wheel assembly 200 rotates to, after the nut 420 moves down, the gear 421 can mesh with the adjusting gear 231 and drive the adjusting gear 231 to rotate.

[0048] The rotating cap positioning sleeve 430 is installed inside the rotating cap 420, and the rotating cap positioning sleeve 430 and the rotating cap 420 can move up and down relative to each other in the longitudinal direction; the return spring 440 is installed between the rotating cap 420 and the rotating cap positioning sleeve 440 and provides the force for the rotating cap 420 to move upward relative to the rotating cap positioning sleeve 430; the first shaft 221 of the center adjusting slider 220 is inserted into the rotating cap positioning sleeve 430, and the first shaft 221 and the rotating cap positioning sleeve 430 are connected by the first bearing 410, so that when the center adjusting slider 220 rotates, it does not drive the rotating cap positioning sleeve 430 to rotate, thereby realizing that the motor 100 does not drive the control component 400 to rotate when it runs.

[0049] Furthermore, a damping ring 460 is provided on the outer periphery of the rotating cap 420. The friction between the damping ring 460 and the rotating cap 420 is greater than the friction between the rotating cap positioning sleeve 430 and the first bearing 410. Similarly, this also prevents the control component 400 from rotating with the motor 100 when the motor 100 rotates.

[0050] A screw 450 is provided between the rotating cap positioning sleeve 430 and the rotating cap 420. The screw 450 limits the movement between the two while allowing them to move up and down relative to each other. The rotating cap positioning sleeve 430 is assembled with the first shaft 211 in the longitudinal direction via a first bearing 410. The top of the rotating cap positioning sleeve 430 is provided with a columnar groove 431. The inner wall of the rotating cap 420 is provided with a post 422. The post 422 of the rotating cap 420 is inserted into the columnar groove 431. The screw 450 is installed in the post 422. The screw 450 restricts the post 422 from disengaging from the columnar groove 431, so that although the rotating cap 420 can move up and down, it cannot be separated from the rotating cap positioning sleeve 430. The return spring 440 is sleeved on the post 422, with one end supported on the inner wall of the rotating cap 420 and the other end supported on one end face of the rotating cap positioning sleeve 430.

[0051] In this embodiment, the rotating cap 420 drives the adjusting gear 231 to rotate. Therefore, the rotating cap 420 is designed to be easy to rotate. Here, the rotating cap 420 is designed as a cover. In other embodiments, it can be designed as a control lever or the like, but its function is the same. In order to facilitate the rotation of the rotating cap 420, friction texture can be provided on the outer periphery of the rotating cap 420.

[0052] In use, without external force, the nut 420 moves upward under the action of the return spring 440, causing the gear 421 at the lower end of the nut 420 to separate from the adjusting gear 231 on the adjusting screw 230; when the motor 100 rotates, it drives the entire eccentric wheel assembly 200 to rotate. Since the first bearing 410 is provided between the control component 400 and the eccentric wheel assembly 200, the control component 400 does not rotate with it, the nut 420 does not drive the adjusting gear 231 to rotate, and the control component 400 does not affect the rotation of the eccentric wheel assembly 200.

[0053] When amplitude adjustment is needed, apply force to press down the cap 420, causing gear 421 to mesh with adjusting gear 231. When the cap 420 is rotated clockwise or counterclockwise, gear 421 on the cap 420 drives adjusting gear 231 on adjusting screw 230 to rotate, thereby driving adjusting screw 230 to rotate. Since adjusting screw 230 meshes with transmission sleeve 222 installed on center adjusting slider 220, and the relative position of transmission sleeve 222 does not move, after adjusting screw 230 rotates, it drives eccentric wheel 210 to move, adjusting the relative position between eccentric wheel 210 and center adjusting slider 220, so that the first axis L1 and the second axis L2 are relatively closer or farther apart, thereby adjusting the center distance of eccentric wheel 210 and achieving the purpose of adjusting massage depth.

[0054] Specifically, in this embodiment, the distance between the first axis L1 and the second axis L2 is adjustable from 3 to 6 mm, that is, the massage amplitude is adjustable from 6 to 12 mm. The adjustable distance between the first axis L1 and the second axis L2 is determined by the relative travel distance between the eccentric wheel 210 and the center adjustment slider 220. In other embodiments, the adjustable distance between the first axis L1 and the second axis L2 may be changed.

[0055] In one embodiment, the swing arm 300 has a mounting ring 310 at its end, and the eccentric wheel 210 is mounted in the mounting ring 310 and can rotate. The first axis L1 passes through the center of the eccentric wheel 210, and the swing arm 300 rotates around the center of the eccentric wheel 210.

[0056] like Figure 5-6 As shown, a connecting component 500 is installed at the front end of the swing arm 300, and the connecting component 500 is connected to the massage head 600. The connecting component 500 includes a movable sleeve 510 and a positioning sleeve 520. Both the movable sleeve 510 and the positioning sleeve 520 are hollow sleeves. The end of the movable sleeve 510 is rotatably connected to the swing arm 300 through a second bearing 511 and a second shaft 512. The positioning sleeve 520 is installed at the front end of the movable sleeve 510. By adjusting the amplitude of the swing arm 300, the massage depth of the massage head 600 can be adjusted.

[0057] Massage devices, such as Figure 6 As shown, it includes: a body 700 and a massage head 600. The aforementioned adjustable eccentric wheel mechanism is installed inside the body 700. The massage head 600 is connected to the adjustable eccentric wheel mechanism, which can adjust the massage depth of the massage head 600 to meet different user needs.

[0058] Specifically, the amplitude-adjustable eccentric wheel mechanism is installed inside the body 700, the motor 100 is fixed inside the body 700 through the motor bracket 120, and the massage head 600 is connected to the connecting component 500 on the amplitude-adjustable eccentric wheel mechanism, and the connection method can be plug-in.

[0059] The body 700 is roughly L-shaped and has a grip 720 for easy holding by the user and a head 710 perpendicular to the grip 720. The head 710 is sleeve-shaped and the connecting component 500 is located inside the head 710. The head 710 restricts the conversion of the curved motion of the swing arm 300 into linear motion.

[0060] Optionally, the above is one shape of the fuselage 700, but in reality, the fuselage 700 can also be designed in other shapes, which will not affect the installation and use of the eccentric wheel mechanism.

[0061] Alternatively, the massage head 600 described herein is generally spherical, while in other embodiments it may be designed in other shapes.

[0062] The control component 400 has a rotating cap 420 protruding from the top of the body 700. The rotating cap 420 can be pressed down relative to the body 700. After being pressed down, the gear 421 at the lower end of the rotating cap 420 is connected to the adjusting gear 231 on the adjusting screw 230. Rotating the rotating cap 420 can adjust the eccentricity between the first axis L1 and the second axis L2. After the external force disappears, the rotating cap 420 automatically resets and moves upward. During the operation of the massage device, the rotating cap 420 remains stationary and does not rotate.

[0063] The massage device mentioned here mainly refers to a fascia gun. By changing the eccentricity between the first axis L1 and the second axis L2, the amplitude of the swing arm is changed, thereby adjusting the massage depth.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An amplitude-adjustable eccentric mechanism, characterized by: include: Motor, eccentric wheel assembly, swing arm and control components; The eccentric wheel assembly includes: an eccentric wheel, a center adjusting slider, and an adjusting screw; The eccentric wheel and the swing arm are rotatably assembled on the first axis; The central adjusting slider, control component, and motor are assembled on the second axis, and the eccentric wheel assembly is driven to rotate by the motor; the control component is assembled with the first shaft of the central adjusting slider, and the control component and the first shaft are connected by a first bearing, so that the control component does not rotate synchronously with the central adjusting slider. The control component has a first state connected to the adjusting screw and a second state disconnected from the adjusting screw; In the first state, the control component drives the center adjusting slider and the eccentric wheel to move relative to each other by adjusting the screw, so as to change the distance between the first axis and the second axis and change the amplitude of the swing arm. The control component includes: a rotating cap, a rotating cap positioning sleeve, a return spring, and a first bearing; the rotating cap, the rotating cap positioning sleeve, and the first bearing are sleeved together on a second axis; the rotating cap positioning sleeve is connected to a first shaft on the central adjusting slider through the first bearing; the rotating cap is sleeved outside the rotating cap positioning sleeve; the return spring is installed between the rotating cap and the rotating cap positioning sleeve and provides a force for the rotating cap to move upward relative to the rotating cap positioning sleeve; a gear is provided at the lower edge of the rotating cap; in the first state, when the rotating cap moves downward, the gear is connected to the adjusting gear on the adjusting screw.

2. An amplitude adjustable eccentric mechanism according to claim 1, characterized in that: The central adjusting slider is provided with a first shaft, which is coaxial with the second axis; the output shaft of the motor is fixedly connected to the first shaft; the adjusting screw is rotatably mounted on the eccentric wheel, and the adjusting screw is connected to the central adjusting slider, converting the curvilinear rotation of the adjusting screw into the linear motion of the central adjusting slider on the eccentric wheel.

3. An amplitude adjustable eccentric mechanism according to claim 2, characterized in that: The central adjusting slider and adjusting screw are both embedded in the eccentric wheel; the adjusting screw is provided with an adjusting gear, and the adjusting screw and the central adjusting slider are connected by a transmission screw sleeve; the relative movement direction of the eccentric wheel and the central adjusting slider is perpendicular to the second axis.

4. The eccentric wheel mechanism with adjustable amplitude according to claim 1, characterized in that: A damping ring is provided on the outside of the rotating cap, and the friction between the damping ring and the rotating cap is greater than the friction between the rotating cap positioning sleeve and the first bearing.

5. The eccentric wheel mechanism with adjustable amplitude according to claim 1, characterized in that: The rotating cap and the rotating cap positioning sleeve are connected by screws and can move up and down relative to each other. The reset spring is connected to the inner wall of the rotating cap and one end wall of the rotating cap positioning sleeve.

6. The eccentric wheel mechanism with adjustable amplitude according to claim 1, characterized in that: The swing arm has a mounting ring at its end, and an eccentric wheel is mounted in the mounting ring and can rotate. The first axis passes through the center of the eccentric wheel, and the swing arm rotates around the center of the eccentric wheel.

7. The eccentric wheel mechanism with adjustable amplitude according to claim 6, characterized in that: The front end of the swing arm is equipped with a connecting component, which is connected to the massage head. The connecting component includes a movable sleeve and a positioning sleeve, and the movable sleeve is rotatably connected to the swing arm through a second bearing.

8. A massage device, including: The body and massage head are characterized in that: the body is equipped with an eccentric wheel mechanism with adjustable amplitude as described in any one of claims 1-7, and the massage head is connected to the eccentric wheel mechanism with adjustable amplitude to change the massage depth of the massage head.

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