CN115388139A

CN115388139A - Amplitude-adjustable eccentric wheel mechanism and massage device

Info

Publication number: CN115388139A
Application number: CN202210967781.6A
Authority: CN
Inventors: 郭建刚
Original assignee: Guangdong Xinbao Electrical Appliances Holdings Co Ltd
Current assignee: Guangdong Xinbao Electrical Appliances Holdings Co Ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2022-11-25

Abstract

The invention discloses an eccentric wheel mechanism with adjustable amplitude and a massage device, comprising: the device comprises a motor, an eccentric wheel component, a swing arm and a control component; the eccentric wheel subassembly includes: the eccentric wheel, the central adjusting slide block and the adjusting screw rod are arranged on the base; the eccentric wheel and the swing arm can be rotatably assembled on a first axis; the center adjusting slide block, the control assembly and the motor are assembled on a second axis, and the eccentric wheel assembly is driven by the motor to rotate; the control assembly is provided with a first state connected with the adjusting screw rod and a second state separated from the adjusting screw rod; in the first state, the control assembly drives the central adjusting slide block and the eccentric wheel to generate relative movement through the adjusting screw rod so as 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, is applied to the fascia gun, can adjust the amplitude of the massage head of the fascia gun, namely adjust the massage depth, and meets the use requirements of different users.

Description

Amplitude-adjustable eccentric wheel mechanism and massage device

Technical Field

The invention relates to the technical field of massagers, in particular to an eccentric wheel mechanism with adjustable amplitude and a massage device.

Background

The fascial gun is a massage product which is popular with consumers in recent years, and the fascial gun mainly adopts the principle that a specially-made high-speed motor in the fascial gun is used for driving a gun head to generate high-frequency vibration to act on a deep muscle layer so as to achieve the effects of reducing local tissue tension, relieving pain, promoting blood circulation and the like.

However, the eccentric distances of all fascia guns or massage instruments on the market are fixed and can not be adjusted singly, so that the massage amplitude can not be adjusted, and for different users, especially the old or the weak, the corresponding massage amplitude can not be adjusted according to the conditions of the users, so that the optimal massage body feeling and massage effect can not be achieved. Such as Chinese patent numbers: 202123092596.7 discloses a fascia gun, which relates to the field of massage devices and comprises a housing, a motor, a massage head and a transmission assembly, wherein the motor, the massage head and the transmission assembly are mounted on the housing; also as in chinese patent No.: 202022717494.9 discloses a fascia gun, which is characterized in that when the fascia gun is used, the motor is started to drive the eccentric wheel to rotate, the eccentric wheel drives the connecting rod and the connecting piece to do horizontal reciprocating motion, and the massaging head on the connecting piece is driven to do horizontal reciprocating motion; in the two patent technologies, the transmission rod is driven to rotate only through the eccentric wheel, but the eccentric wheel and the transmission rod cannot be adjusted, namely the vibration amplitude of the massage head is not adjustable, and different massage requirements cannot be met.

Based on the reasons, in order to improve the comfort and the practicability of the massage instrument and meet the use requirements of different people, the eccentric wheel mechanism in the prior art is improved.

Disclosure of Invention

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

In order to achieve the purpose, the invention adopts the following technical scheme: an amplitude adjustable eccentric wheel mechanism comprising: the device comprises a motor, an eccentric wheel component, a swing arm and a control component; the eccentric wheel subassembly include: the eccentric wheel, the central adjusting slide block and the adjusting screw rod are arranged on the base; the eccentric wheel and the swing arm can be rotatably assembled on a first axis; the central adjusting slide block, the control assembly and the motor are assembled on a second axis, and the eccentric wheel assembly is driven by the motor to rotate; the control assembly is provided with a first state connected with the adjusting screw rod and a second state separated from the adjusting screw rod; in a first state, the control assembly drives the central adjusting slide block and the eccentric wheel to generate relative movement through an adjusting screw rod so as to change the distance between the first axis and the second axis and change the amplitude of the swing arm; the eccentric wheel mechanism with the structure can adjust the eccentric distance, is applied to a massage device, particularly a fascia gun, and can adjust the amplitude of a massage head of the fascia gun, namely adjust the massage depth, thereby meeting the use requirements of different users; when the amplitude is adjusted, the control assembly is switched to a first state, the control assembly drives the adjusting screw rod to rotate, and because the relative position between the central adjusting sliding block and the output shaft of the motor is fixed, the eccentric wheel is relatively driven to move, the relative distance between the first axis and the second axis on the eccentric wheel assembly is adjusted, and the purpose of adjusting the eccentric distance is achieved; when the control assembly rotates clockwise, the adjusting amplitude is increased, and when the control assembly rotates anticlockwise, the adjusting amplitude is decreased; after the amplitude adjustment is finished, the control assembly is automatically switched to a second state (namely reset), and the control assembly does not synchronously rotate along with the motor and does not influence the operation of the eccentric wheel assembly.

In a further technical scheme, a first shaft body is arranged on the central adjusting slide block, and the first shaft body is coaxial with a second axis; an output shaft of the motor is fixedly connected with the first shaft body; the adjusting screw rod is rotatably arranged on the eccentric wheel and connected with the central adjusting slide block, and the curve rotation of the adjusting screw rod is converted into the linear motion of the central adjusting slide block on the eccentric wheel; the eccentric wheel component is driven by the motor to synchronously rotate so as to drive the swing arm; if the second axis is defined to be fixed, the position of the central adjusting slide block on the eccentric wheel is adjusted, and after the eccentric wheel moves relatively, the distance between the first axis and the second axis on the eccentric wheel assembly is adjusted, namely the amplitude of the swing arm is changed; the mode that the eccentric wheel is driven to move by the adjusting screw rod is adopted, the integral structure is compact, and the adjusting mode is simple.

In a further technical scheme, the central adjusting slide block and the adjusting screw rod are embedded and installed on the eccentric wheel; the adjusting screw is provided with an adjusting gear, and the adjusting screw is connected with the central adjusting slide block through a transmission threaded sleeve; the relative movement direction of the eccentric wheel and the central adjusting slide block is vertical to the second axis, and the adjustment of the distance between the first axis and the second axis, namely the adjustment of the eccentric distance, can be realized in the relative movement process of the eccentric wheel and the central adjusting slide block, so that the aim of adjusting the amplitude is fulfilled; the specific structures and mounting positions of the central adjusting slide block and the adjusting screw rod are limited, and the central adjusting slide block and the adjusting screw rod are assembled in an embedding manner, so that the assembly is more stable, the height can be effectively saved, and the product volume is reduced;

in a further technical scheme, the control assembly is assembled with the first shaft body of the central adjusting slide block, and the control assembly is connected with the first shaft body through a first bearing, so that the control assembly and the central adjusting slide block do not rotate synchronously; through the setting of first bearing, reached the coaxial equipment of control assembly and center adjusting slide block, the output shaft of motor but not synchronous rotation's purpose.

In a further technical solution, the control assembly includes: the device comprises a screw cap, a screw cap positioning sleeve, a return spring and a first bearing; the screw cap, the screw cap positioning sleeve and the first bearing are mutually sleeved on a second axis; the rotating cap positioning sleeve is connected with the first shaft body on the central adjusting slide block through a first bearing, the rotating cap is sleeved outside the rotating cap positioning sleeve, and the return spring is arranged between the rotating cap and the rotating cap positioning sleeve and provides upward force for the rotating cap relative to the rotating cap positioning sleeve; the gear is arranged at the lower edge of the screw cap, when the screw cap moves downwards in the first state, the gear is connected with the adjusting gear on the adjusting screw rod, the screw cap is rotated to drive the adjusting gear to rotate clockwise or anticlockwise, the amplitude can be increased or reduced, the gear at the lower end of the screw cap is arranged in an annular mode, and no matter the eccentric wheel mechanism rotates to any angle, the gear after the screw cap moves downwards can be meshed with the adjusting gear, so that the purpose of driving the adjusting gear to rotate and adjusting the amplitude of the swing arm is achieved.

In a further technical scheme, a damping ring is arranged outside the screw cap, and the friction force between the damping ring and the screw cap is greater than the friction force between the screw cap positioning sleeve and the first bearing, so that the aim that the control assembly does not rotate along with the eccentric wheel assembly and the motor can be fulfilled.

In a further technical scheme, the screw cap and the screw cap positioning sleeve are connected through screws and can move up and down relatively, and the return spring is connected to the inner wall of the screw cap and one end wall of the screw cap positioning sleeve; the concrete structure between the nut screwing and the nut screwing positioning sleeve is limited, the structure is simple, the assembly is convenient, when the control assembly is switched between the first state and the second state, the control assembly is executed by vertically moving the nut relative to the nut screwing positioning sleeve, so that the gear at the lower edge of the nut screwing can be meshed with or separated from the adjusting gear, the adjusting purpose is achieved, and the structure is simple and the use is convenient.

In a further technical scheme, an installation ring is formed at the tail end of the swing arm, the eccentric wheel is installed in the installation ring, the first axis penetrates through the circle center of the eccentric wheel, and the swing arm rotates around the circle center of the eccentric wheel.

In a further technical scheme, a connecting assembly is mounted at the front end of the swing arm and is connected with the massage head; the coupling assembling includes: the movable sleeve is rotatably connected with the swing arm through a second bearing; the front end of the connecting component can be connected with massage heads of different types to achieve different massage functions.

In a further technical scheme, the eccentric wheel mechanism with adjustable amplitude is arranged in the machine body, and the massage head is connected with the eccentric wheel mechanism with adjustable amplitude so as to change the massage depth of the massage head.

Other advantageous technical effects of the present invention are described in the detailed description of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of an eccentric wheel mechanism;

FIG. 2 is a cross-sectional view of the eccentric mechanism;

FIG. 3 is a partial exploded view of the eccentric mechanism;

FIG. 4 is an exploded view of the eccentric mechanism;

FIG. 5 is a schematic view of the eccentric mechanism and the massage head assembled together;

fig. 6 is a schematic view of a massage device.

Description of reference numerals:

motor 100	Output shaft 110	Motor support 120
				Eccentric wheel assembly 200	Eccentric wheel 210	First mounting cavity 211	Second mounting cavity 212
Center adjusting slide block 220	First shaft 221	Drive nut 222	Mounting station 223
				Linear clamping groove 224	Adjusting screw 230	Adjusting gear 231	Threaded segment 232
Swing arm 300	Mounting ring 310
				Control assembly 400	First bearing 410	Screw cap 420	Gear 421
Insert column 422	Rotating cap locating sleeve 430	Columnar groove 431	Return spring 440
				Screw 450	Damping ring 460
Connection assembly 500	Movable sleeve 510	Second bearing 511	Second shaft body 512
				Position sleeve 520
Massage head 600
				Fuselage 700	Handpiece 710	Grip 720

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

In the description of the present application, it is to be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the indicated orientations and positional relationships based on the orientation shown in the drawings for ease of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting of the present application. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

An amplitude adjustable eccentric wheel mechanism, as shown in fig. 1-4, comprising: motor 100, eccentric wheel assembly 200, swing arm 300 and control assembly 400.

The motor 100 is mainly used as a power source, and an output shaft 110 is arranged on the motor 100; the eccentric wheel assembly 200 is mounted on the output shaft 110 of the motor 100, and is driven by the motor 100 to rotate, so as to drive the swing arm 300 to swing.

The swing arm 300 is connected with the eccentric wheel assembly 200, is driven by the eccentric wheel assembly 200 to swing, converts the curve motion of the eccentric wheel assembly 200 into the linear telescopic movement of the swing arm 300 under the external limitation, and is applied to a fascia gun to facilitate the massage of acting on a human body.

The swing arm 300 and the eccentric wheel assembly 200 are assembled on a first axis L1, and the swing arm 300 and the eccentric wheel assembly 200 are rotatably connected; and the eccentric wheel assembly 200 is assembled with the motor 100 on the second axis L2, the first axis L1 and the second axis L2 do not overlap, and an eccentricity is formed between the first axis L1 and the second axis L2, which defines the amplitude of the swing arm 300; the conventional eccentric driving structure cannot adjust the amplitude of the swing arm 300 due to the fixed relative distance between the first axis L1 and the second axis L2;

in the present invention, a control assembly 400 is added, and the relative distance between the first axis L1 and the second axis L2 can be adjusted by the control assembly 400 to adjust the amplitude of the swing arm 300.

Specifically, the eccentric wheel assembly 200, the motor 100 and the control assembly 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 assembly 400 does not follow the rotation.

The eccentric wheel assembly 200 includes: the eccentric wheel 210, the central adjusting slider 220 and the adjusting screw 230, wherein the central 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, the curvilinear motion of the adjusting screw 230 is converted into the linear motion of the central adjusting slider 220 on the eccentric wheel 210, and the purpose of adjusting the relative position between the central adjusting slider 220 and the eccentric wheel 210 is achieved.

The center adjusting slider 220 is provided with a first shaft 221, the first shaft 221 is coaxial with a second axis L2, the first axis L1 is fixed on the eccentric wheel 210, and the relative movement direction between the center adjusting slider 220 and the eccentric wheel 210 is perpendicular to the second axis L2, so that the relative position between the center adjusting slider 220 and the eccentric wheel 210 is adjusted, that is, the distance between the first axis L1 and the second axis L2 is adjusted, thereby achieving the purpose of adjusting the amplitude of the swing arm 300.

Further, in order to achieve the purpose of converting the curvilinear motion of the adjusting screw 230 into the linear motion of the central adjusting slider 220, an adjusting gear 231 is mounted on the adjusting screw 230, the adjusting gear 231 is limited to the eccentric wheel 210 to be only rotatable, and the adjusting gear 231 drives the adjusting screw 230 to rotate when rotating;

the tail end of the adjusting screw 230 is provided with a threaded section 232, a transmission threaded sleeve 222 is arranged in the central adjusting sliding block 220, and the threaded section 232 is connected with the transmission threaded sleeve 222; the center adjustment slider 220 is pushed to move when the adjustment screw 230 is rotated. The adjusting screw 230 is relatively perpendicular to the output shaft 110 of the motor 100 in a spatial orientation, that is, the output shaft 110 is vertically arranged in fig. 2, the adjusting screw 230 is horizontally arranged, and the first shaft body 221 is also vertically arranged and coaxial with the motor shaft 110; the side surface of the central adjusting slide block 220 is provided with a mounting position 223 assembled with a transmission threaded sleeve 222; the adjusting gear 231 is vertically installed.

Specifically, referring to fig. 2, it is defined that when the eccentric mechanism is installed on the massage apparatus, the position of the motor 100 is fixed, i.e. the position of the second axis L2 is fixed, and the position of the central adjusting slider 220 is fixed, and when the adjusting screw 230 rotates, the position of the central adjusting slider 220 is fixed, i.e. the eccentric 210 is correspondingly pushed to move.

As shown in fig. 4, in order to reduce the overall height of the product, a first mounting cavity 211 and a second mounting cavity 212 are provided in the eccentric wheel 210, a central adjusting slider 220 is embedded in the first mounting cavity 211, an adjusting screw 230 is embedded in the second mounting cavity 212, and a threaded section 232 of the adjusting screw 230 extends into the first mounting cavity 211 to be connected with the central adjusting slider 220; after the center adjusting slider 220 is installed, the center adjusting slider can only move linearly in the first installation cavity 211, and the first shaft body 221 protrudes upward from the end surface 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 central adjusting slider 220 and the adjusting screw 230 to rotate synchronously.

Enough space for the eccentric wheel 210 and the central adjusting sliding block 220 to move relatively is arranged in the first mounting cavity 211, and in the moving process, the central adjusting sliding block 220 cannot leave the first mounting cavity 211, so that the use safety is ensured.

In addition, in order to guide the linear movement between the center adjustment slider 220 and the eccentric wheel 210, a guide structure may be provided therebetween, such as a linear groove 224 provided on an outer surface of the center adjustment slider 220 and a protrusion (not shown) provided on an inner wall of the first mounting cavity 211, or alternatively a protrusion provided on an outer surface of the center adjustment slider 220 and a linear groove provided on an inner wall of the first mounting cavity 211.

In one embodiment, the control assembly 400 is assembled with the first shaft 221 of the center-adjusting slider 220, and the control assembly 400 is connected with the first shaft 221 through the first bearing 410, so that the control assembly 400 does not rotate synchronously with the center-adjusting slider 220.

The control assembly 400 has a first state and a second state, as shown in fig. 1-2, the control assembly 400 is in the first state, the control assembly 400 is triggered to move down to engage with the adjusting gear 231, when the control assembly 400 rotates, the adjusting gear 231 can be driven to rotate, the adjusting screw 230 and the adjusting gear 231 rotate synchronously, and then the relative positions between the adjusting eccentric 210 and the central adjusting slider 220 are achieved, so as 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 unit 400 moves upward, the control unit 400 does not engage with the adjustment gear 231, and the control unit 400 cannot drive the adjustment gear 231 to rotate even if it rotates.

Specifically, the control assembly 400 includes: the screw cap 420, the screw cap locating sleeve 430, the return spring 440 and the first bearing 410;

the gear 421 is arranged on the lower edge of the screw cap 420, and the gear 421 and the screw cap 420 can be integrally formed or assembled in a split manner. The teeth of the gear 421 are downward arranged, and can be engaged with the adjusting gear 231 when the screw cap 420 moves downward, and when the screw cap 420 rotates, the adjusting gear 231 is driven to rotate by the gear 421.

The gear 421 is a ring gear, so that, no matter the eccentric wheel assembly 200 rotates to any angle or position, the gear 421 can be engaged with the adjusting gear 231 and drive the adjusting gear 231 to rotate after the turncap 420 moves downwards.

The screw cap positioning sleeve 430 is arranged inside the screw cap 420, and the screw cap positioning sleeve 430 and the screw cap 420 can relatively move up and down in the longitudinal direction; the return spring 440 is installed between the screw cap 420 and the screw cap positioning sleeve 440 and provides the upward force of the screw cap 420 relative to the screw cap positioning sleeve 430; the first shaft body 221 of the center adjusting sliding block 220 is inserted into the nut positioning sleeve 430, and the first shaft body 221 and the nut positioning sleeve 430 are connected through the first bearing 410, so that the center adjusting sliding block 220 does not drive the nut positioning sleeve 430 to rotate when rotating, and the control assembly 400 is not driven to rotate when the motor 100 operates.

Further, the outer circumference of the screw cap 420 is provided with a damping ring 460, the friction force between the damping ring 460 and the screw cap 420 is greater than the friction force between the screw cap positioning sleeve 430 and the first bearing 410, and similarly, when the motor 100 rotates, the control assembly 400 does not rotate along with the motor 100.

A screw 450 is arranged between the screw cap positioning sleeve 430 and the screw cap 420, the screw 450 is used for limiting the position between the two, and meanwhile, the two can have a stroke of relatively moving up and down; the screw cap positioning sleeve 430 is assembled with the first shaft body 211 through the first bearing 410 in the longitudinal direction, a cylindrical groove 431 is arranged at the top of the screw cap positioning sleeve 430, an insertion column 422 is arranged on the inner wall of the screw cap 420, the insertion column 422 of the screw cap 420 is inserted into the cylindrical groove 431, the screw 450 is installed in the insertion column 422, and the screw 450 limits the insertion column 422 to be separated from the cylindrical groove 431, so that the screw cap 420 can move up and down but cannot be separated from the screw cap positioning sleeve 430; the return spring 440 is sleeved on the insertion column 422, one end of the return spring is supported on the inner wall of the screw cap 420, and the other end of the return spring is supported on one end surface of the screw cap positioning sleeve 430.

In this embodiment, the adjusting gear 231 is driven to rotate by the rotation of the screw cap 420, so that the screw cap 420 is designed to be rotated conveniently, here, the screw cap 420 is designed to be cover-shaped, and in other embodiments, the screw cap can be designed to be control rod-shaped, but the function is the same; to facilitate rotation of the screw cap 420, a friction texture may be provided on the outer circumference of the screw cap 420.

When in use, under the action of no external force, the screw cap 420 moves upwards under the action of the return spring 440, so that the gear 421 at the lower end of the screw cap 420 is separated from the adjusting gear 231 on the adjusting screw 230; when the motor 100 rotates, the entire eccentric wheel assembly 200 is driven to rotate, and since the first bearing 410 is disposed between the control assembly 400 and the eccentric wheel assembly 200, the control assembly 400 does not rotate, the screw cap 420 does not drive the adjusting gear 231 to rotate, and the control assembly 400 does not affect the rotation of the eccentric wheel assembly 200.

When the amplitude needs to be adjusted, the screwing cap 420 is pressed down by applying force, so that the gear 421 is meshed with the adjusting gear 231, when the screwing cap 420 is rotated clockwise or anticlockwise, the gear 421 on the screwing cap 420 drives the adjusting gear 231 on the adjusting screw 230 to rotate, so that the adjusting screw 230 is driven to rotate, and the adjusting screw 230 is meshed with the transmission screw sleeve 222 arranged on the central adjusting slider 220, and the relative position of the transmission screw sleeve 222 is fixed, so that after the adjusting screw 230 rotates, the eccentric wheel 210 is driven to move, the relative position between the eccentric wheel 210 and the central adjusting slider 220 is adjusted, so that the first axis L1 and the second axis L2 are relatively close to or far away from each other, and the purpose of adjusting the center distance of the eccentric wheel 210 and adjusting the massage depth is achieved.

Specifically, in the present embodiment, the distance between the first axis L1 and the second axis L2 is freely adjusted between 3 and 6mm, that is, the massage amplitude is freely adjusted between 6 and 12 mm. The size of the adjustable distance between the first axis L1 and the second axis L2 is determined by the stroke of the relative movement between the eccentric 210 and the center-adjusting slider 220, and in other embodiments, the adjustable distance between the first axis L1 and the second axis L2 may be modified.

In one embodiment, the swing arm 300 is formed with a mounting ring 310 at an end thereof, the eccentric 210 is rotatably mounted in the mounting ring 310, the first axis L1 passes through a center of the eccentric 210, and the swing arm 300 rotates around the center of the eccentric 210.

As shown in fig. 5-6, the front end of the swing arm 300 is provided with a connecting assembly 500, and the connecting assembly 500 is connected with the massage head 600; the connecting assembly 500 includes: the movable sleeve 510 and the positioning sleeve 520 are both hollow sleeve bodies, the tail end of the movable sleeve 510 is rotatably connected with the swing arm 300 through a second bearing 511 and a second shaft body 512, and the positioning sleeve 520 is arranged at the front end of the movable sleeve 510; the purpose of adjusting the massage depth of the massage head 600 is achieved by adjusting the amplitude of the swing arm 300.

As shown in fig. 6, the massage device includes: the machine body 700 and the massage head 600 are internally provided with the eccentric wheel mechanism with adjustable amplitude, and the massage head 600 is connected with the eccentric wheel mechanism with adjustable amplitude, so that the massage depth of the massage head 600 can be adjusted, and the user's unused requirements can be met.

Specifically, the eccentric wheel mechanism with adjustable amplitude is installed in the machine body 700, the motor 100 is fixed in the machine body 700 through the motor bracket 120, and the massage head 600 is connected with the connecting assembly 500 on the eccentric wheel mechanism with adjustable amplitude, and the connecting mode can be splicing.

The body 700 is substantially L-shaped, and has a holding portion 720 for a user to hold and a head 710 perpendicular to the holding portion 720, the head 710 is in a sleeve shape, the connecting assembly 500 is located in the head 710, and the head 710 limits the conversion of the curved motion of the swing arm 300 into a linear motion.

Alternatively, the above is one shape of the body 700, but in practice the body 700 may be designed in other shapes that do not interfere with the installation and use of the eccentric mechanism.

Alternatively, the massage head 600 described herein is generally spherical, but in other embodiments, may be designed in other shapes.

The screw cap 420 of the control assembly 400 protrudes from the top of the body 700, the screw cap 420 can be pressed down relative to the body 700, a gear 421 at the lower end of the screw cap 420 is pressed down and connected with an adjusting gear 231 on the adjusting screw 230, and the eccentric distance between the first axis L1 and the second axis L2 can be adjusted by rotating the screw cap 420; after the external force disappears, the screw cap 420 automatically resets to move upwards, and the screw cap 420 is kept still and does not rotate during the operation of the massage device.

The massage device mainly refers to a fascia gun, and the amplitude of the swing arm is changed by changing the eccentricity between the first axis L1 and the second axis L2, so that the purpose of adjusting the massage depth is achieved.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended 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 wheel mechanism which characterized in that: the method comprises the following steps: the device comprises a motor, an eccentric wheel component, a swing arm and a control component; the eccentric wheel subassembly include: the eccentric wheel, the central adjusting slide block and the adjusting screw rod are arranged on the base;

the eccentric wheel and the swing arm can be rotatably assembled on a first axis;

the center adjusting slide block, the control assembly and the motor are assembled on a second axis, and the eccentric wheel assembly is driven by the motor to rotate; the control assembly is provided with a first state connected with the adjusting screw rod and a second state separated from the adjusting screw rod;

in a first state, the control assembly drives the central adjusting slide block and the eccentric wheel to generate relative movement through the adjusting screw rod so as to change the distance between the first axis and the second axis and change the amplitude of the swing arm.

2. An adjustable amplitude eccentric wheel mechanism according to claim 1, characterized in that: the central adjusting slide block is provided with a first shaft body which is coaxial with the second axis; an output shaft of the motor is fixedly connected with the first shaft body; the adjusting screw rod is rotatably arranged on the eccentric wheel and connected with the central adjusting slide block, and the curve rotation of the adjusting screw rod is converted into the linear motion of the central adjusting slide block on the eccentric wheel.

3. An adjustable amplitude eccentric wheel mechanism according to claim 2, characterized in that: the central adjusting slide block and the adjusting screw rod are embedded and arranged on the eccentric wheel; the adjusting screw is provided with an adjusting gear, and the adjusting screw is connected with the central adjusting slide block through a transmission threaded sleeve; the relative moving direction of the eccentric wheel and the central adjusting slide block is vertical to the second axis.

4. An adjustable amplitude eccentric wheel mechanism according to claim 1, characterized in that: the control assembly is assembled with the first shaft body of the central adjusting slide block, and the control assembly is connected with the first shaft body through a first bearing, so that the control assembly does not rotate synchronously with the central adjusting slide block.

5. An amplitude adjustable eccentric wheel mechanism according to claim 4, characterized in that: the control assembly comprises: the device comprises a screw cap, a screw cap positioning sleeve, a return spring and a first bearing; the screw cap, the screw cap positioning sleeve and the first bearing are mutually sleeved on a second axis; the rotating cap positioning sleeve is connected with the first shaft body on the central adjusting slide block through a first bearing, the rotating cap is sleeved outside the rotating cap positioning sleeve, and the return spring is arranged between the rotating cap and the rotating cap positioning sleeve and provides upward force for the rotating cap relative to the rotating cap positioning sleeve; a gear is arranged at the lower edge of the screw cap, and the gear is connected with the adjusting gear on the adjusting screw rod when the screw cap moves downwards in the first state.

6. An amplitude adjustable eccentric wheel mechanism according to claim 5, characterized in that: the friction force between the damping ring and the screw cap is larger than the friction force between the screw cap positioning sleeve and the first bearing.

7. An amplitude adjustable eccentric wheel mechanism according to claim 5, characterized in that: the screw cap and the screw cap positioning sleeve are connected through screws and can move up and down relatively, and the reset spring is connected to the inner wall of the screw cap and one end wall of the screw cap positioning sleeve.

8. An adjustable amplitude eccentric wheel mechanism according to claim 1, characterized in that: the tail end of the swing arm is provided with a mounting ring, the eccentric wheel is mounted in the mounting ring and can rotate, the first axis penetrates through the circle center of the eccentric wheel, and the swing arm rotates around the circle center of the eccentric wheel.

9. An amplitude adjustable eccentric wheel mechanism according to claim 8, characterized in that: the front end of the swing arm is provided with a connecting component which is connected with the massage head; the coupling assembling includes: the movable sleeve is rotatably connected with the swing arm through a second bearing.

10. A massage device comprising: fuselage and massage head, its characterized in that: the machine body is internally provided with the eccentric wheel mechanism with adjustable amplitude as claimed in any one of claims 1 to 9, and the massage head is connected with the eccentric wheel mechanism with adjustable amplitude so as to change the massage depth of the massage head.