Drive structure and fascia gun

Abstract

A driving mechanism and a fascia gun, the driving mechanism comprising: a driving motor, a first eccentric wheel disposed on one side of the driving motor, a second eccentric wheel disposed on the other side of the driving motor, a transmission piston movably disposed near the driving motor, a first connecting rod connected between the first eccentric wheel and the transmission piston, and a second connecting rod connected between the second eccentric wheel and the transmission piston; a first rotating shaft for driving the first eccentric wheel to rotate is provided on one side of the driving motor, and a second rotating shaft for driving the second eccentric wheel to rotate is provided on the other side of the driving motor; in the axial direction of the first rotating shaft, the first eccentric wheel and the second eccentric wheel are placed in opposite directions; the transmission piston is connected to the first eccentric wheel through the first connecting rod and to the second eccentric wheel through the second connecting rod. In the plane perpendicular to the first rotating shaft, due to the limiting effects of the first connecting rod and the second connecting rod on both sides of the transmission piston respectively, shaking in the direction perpendicular to the linear motion of the transmission piston is avoided.

Description

Technical Field

[0001] The invention relates to a massage health care tool, in particular to a driving structure and a fascia gun. Background Art

[0002] There are often soreness in life that cannot be ignored. Whether you are a professional athlete or a general leisure enthusiast, you must have experienced muscle soreness. At present, the fascia gun is a good tool to help stretch and recover after exercise. Professional athletes and amateur fitness enthusiasts can use it. Vibration massage mainly massages large muscle groups, relaxes fascia, reduces soreness, and makes training more effective. The fascia gun uses vibration frequency to relieve muscle spasms, increase blood flow, and greatly shorten muscle recovery time.

[0003] The transmission structure of the fascia gun in the prior art uses a single connecting rod to drive the piston to move in order to achieve the reciprocating linear motion of the piston. However, when the motor drives the connecting rod to swing, the piston shakes in the vertical direction of the linear motion due to the lateral force, resulting in a poor user experience of the fascia gun. Summary of the invention

[0004] Based on this, it is necessary to provide a driving structure and a fascia gun to address the problem that the piston shakes in the vertical direction of linear motion due to the action of lateral force.

[0005] A driving mechanism comprises: a driving motor, a first eccentric wheel arranged on one side of the driving motor, a second eccentric wheel arranged on the other side of the driving motor, a transmission piston movably arranged near the driving motor, a first connecting rod connected between the first eccentric wheel and the transmission piston, and a second connecting rod connected between the second eccentric wheel and the transmission piston; a first rotating shaft for driving the first eccentric wheel to rotate is provided on one side of the driving motor, and a second rotating shaft for driving the second eccentric wheel to rotate is provided on the other side of the driving motor; in the axial direction of the first rotating shaft, the first eccentric wheel and the second eccentric wheel are placed opposite to each other.

[0006] The above-mentioned driving mechanism is arranged in opposite directions with the first eccentric wheel and the second eccentric wheel, and the transmission piston is connected to the first eccentric wheel through the first connecting rod, and is connected to the second eccentric wheel through the second connecting rod. On the plane perpendicular to the first rotating shaft, the two sides of the transmission piston are respectively restricted by the first connecting rod and the second connecting rod, thereby avoiding shaking in the vertical direction of the linear motion of the transmission piston, thereby improving the user experience of the fascia gun.

[0007] In one embodiment, the drive motor is a dual-rotor motor; the first eccentric wheel includes a first sector-shaped eccentric piece having a first shaft hole in the middle and a first eccentric shaft disposed deviating from the middle of the first sector-shaped eccentric piece; the first rotating shaft is inserted into the first shaft hole; the second eccentric wheel includes a second sector-shaped eccentric piece having a second shaft hole in the middle and a second eccentric shaft disposed deviating from the middle of the second sector-shaped eccentric piece; the second rotating shaft is inserted into the second shaft hole; the first eccentric wheel and the second eccentric wheel rotate in opposite directions; one end of the first connecting rod is sleeved on the first eccentric shaft, and the other end of the first connecting rod is pivotally connected to the transmission piston; one end of the second connecting rod is sleeved on the second eccentric shaft, and the other end of the second connecting rod is pivotally connected to the transmission piston; thereby enabling the first connecting rod and the second connecting rod to simultaneously push the transmission piston away from the drive motor or simultaneously push the transmission piston close to the drive motor, effectively restricting and eliminating the lateral force on the transmission piston.

[0008] In one embodiment, a notch is provided at the edge of the first sector-shaped eccentric piece; the first eccentric shaft is disposed close to the notch on the first sector-shaped eccentric piece; the structure of the second eccentric wheel is the same as that of the first eccentric wheel; thereby enabling the first rotating shaft or the second rotating shaft to rotate smoothly.

[0009] In one embodiment, fixed bearing members are respectively accommodated at both ends of the first connecting rod or the second connecting rod; the first eccentric shaft or the second eccentric shaft is inserted into the fixed bearing members; the other end of the first connecting rod and the other end of the second connecting rod are pivotally connected to the transmission piston through a pin shaft; thereby reducing the friction suffered by the first connecting rod or the second connecting rod and improving the service life of the drive mechanism.

[0010] In one embodiment, the first eccentric wheel includes a first sector-shaped eccentric piece having a first shaft hole in the middle and a first eccentric shaft deviating from the middle of the first sector-shaped eccentric piece; the first rotating shaft is inserted into the first shaft hole; the second eccentric wheel includes a second sector-shaped eccentric piece having a second shaft hole in the middle and a second eccentric shaft deviating from the middle of the second sector-shaped eccentric piece; the second rotating shaft is inserted into the second shaft hole; the first eccentric wheel and the second eccentric wheel rotate in the same direction; a chute is provided at one end of the first connecting rod close to the first eccentric shaft; the first eccentric shaft is accommodated in the chute; the other end of the first connecting rod is pivotally connected to the transmission piston; one end of the second connecting rod is sleeved on the second eccentric shaft, and the other end of the second connecting rod is pivotally connected to the transmission piston; thereby effectively restricting and eliminating the lateral force on the transmission piston.

[0011] In one embodiment, a sliding bearing member is sleeved on the first eccentric shaft; the width of the sliding groove is equal to or greater than the outer diameter of the sliding bearing member; thereby, the wear of the first eccentric shaft during its movement in the sliding groove can be reduced, and the service life of the driving mechanism can be improved.

[0012] A fascia gun includes a driving mechanism, a main housing assembly for accommodating the driving mechanism, a guiding assembly for guiding the transmission piston, a massage head connected to the transmission piston, a control circuit connected to the driving motor, and an energy storage member connected to the driving motor; under the operation of the driving motor, the transmission piston drives the massage head to generate an impact motion, producing a massage effect on the human body.

[0013] In one embodiment, the driving mechanism further includes a fixed limiting plate connected to the main body of the driving motor; the main housing assembly includes a base housing, a handle connected to the base housing, and a side cover buckled on one side of the base housing; a pillar portion connected to the fixed limiting plate extends inside the base housing; thereby, the installation of the driving mechanism in the main housing assembly can be realized.

[0014] In one embodiment, the guiding assembly includes a cylinder sleeve sleeved on the transmission piston, a first buffer soft sleeve sleeved on the outside of the cylinder sleeve, and a positioning ring for limiting the cylinder sleeve or the first buffer soft sleeve on one side of the main housing assembly; a second buffer soft sleeve is sleeved on one end of the massage head close to the transmission piston; thereby, buffer protection is provided for the massage head to avoid damage.

[0015] In one embodiment, the main housing assembly further includes a decorative cover for accommodating the positioning ring, a support seat connected to one side of the base housing, and a face cover covering the support seat; the control circuit is installed on the support seat; thereby, the sealing performance of the fascia gun is ensured. Description of the Drawings

[0016] Figure 1 Is a three-dimensional schematic diagram of a fascia gun according to an embodiment of the present invention;

[0017] Figure 2 Is Figure 1 A partial schematic diagram of the fascia gun shown, in which the side cover has been hidden;

[0018] Figure 3 Is Figure 1 An exploded schematic diagram of the fascia gun shown;

[0019] Figure 4 Is a three-dimensional schematic diagram of the driving mechanism according to the first embodiment of the present invention;

[0020] Figure 5 Is Figure 4 A three-dimensional schematic diagram of the driving mechanism shown from another angle;

[0021] Figure 6 is Figure 4 the exploded schematic view of the drive mechanism shown;

[0022] Figure 7 is the three-dimensional schematic view of the drive mechanism of the second embodiment of the present invention;

[0023] Figure 8 is Figure 7 the three-dimensional schematic view of the drive mechanism shown from another angle;

[0024] Figure 9 is Figure 7 the exploded schematic view of the drive mechanism shown;

[0025] Figure 10A is the steering schematic view of the first rotating shaft and the second rotating shaft of the drive motor of the first embodiment of the present invention;

[0026] Figure 10B is the steering schematic view of the first rotating shaft and the second rotating shaft of the drive motor of the second embodiment of the present invention.

[0027] The corresponding relationship between the reference numerals and their meanings in the drawings is as follows:

[0028] 100, fascia gun; 20, drive mechanism; 21, drive motor; 211, first rotating shaft; 212, second rotating shaft; 22, first eccentric wheel; 222, first sector-shaped eccentric piece; 221, first shaft hole; 224, notch; 223, first eccentric shaft; 23, second eccentric wheel; 232, second sector-shaped eccentric piece; 231, second shaft hole; 233, second eccentric shaft; 24, drive piston; 25, first connecting rod; 251, fixed bearing member; 252, pin shaft; 253, chute; 254, sliding bearing member; 26, second connecting rod; 27, fixed limit plate; 28, rubber ring; 30, main housing assembly; 31, base housing; 311, pillar portion; 312, motor mounting portion; 32, handle; 33, side cover; 34, decorative cover; 35, support seat; 36, face cover; 40, guiding assembly; 41, cylinder sleeve; 411, lubricating hole; 42, first buffer soft sleeve; 43, positioning ring; 50, massage head; 51, second buffer soft sleeve; 60, control circuit; 70, energy storage member. Detailed Embodiments

[0029] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of this invention herein are for the purpose of describing specific embodiments only and are not intended to limit the invention.

[0031] Please refer to Figures 1 to 10B , which is the driving mechanism 20 of an embodiment of the present invention, used to drive the movement of the massage head 50 of the fascia gun 100. The driving mechanism 20 includes a driving motor 21, a first eccentric wheel 22 disposed on one side of the driving motor 21, a second eccentric wheel 23 disposed on the other side of the driving motor 21, a transmission piston 24 movably disposed near the driving motor 21, a first connecting rod 25 connected between the first eccentric wheel 22 and the transmission piston 24, and a second connecting rod 26 connected between the second eccentric wheel 23 and the transmission piston 24; a first rotating shaft 211 for driving the first eccentric wheel 22 to rotate is provided on one side of the driving motor 21, and a second rotating shaft 212 for driving the second eccentric wheel 23 to rotate is provided on the other side of the driving motor 21; in the axial direction of the first rotating shaft 211, the first eccentric wheel 22 and the second eccentric wheel 23 are placed in opposite directions.

[0032] By placing the first eccentric wheel 22 and the second eccentric wheel 23 in opposite directions, and the transmission piston 24 is connected to the first eccentric wheel 22 through the first connecting rod 25 and to the second eccentric wheel 23 through the second connecting rod 26. In the plane perpendicular to the first rotating shaft 211, since the two sides of the transmission piston 24 are respectively restricted by the first connecting rod 25 and the second connecting rod 26, the shaking in the direction perpendicular to the linear movement of the transmission piston 24 is avoided, improving the user experience of the fascia gun 100.

[0033] Please refer to Figure 4 , Figure 5 , Figure 6 and Figure 10A , in one of the embodiments, the driving motor 21 is a dual-rotor motor; the first eccentric wheel 22 includes a first sector-shaped eccentric piece 222 with a first shaft hole 221 in the middle and a first eccentric shaft 223 disposed deviating from the middle of the first sector-shaped eccentric piece 222; the first rotating shaft 211 passes through the first shaft hole 221; the second eccentric wheel 23 includes a second sector-shaped eccentric piece 232 with a second shaft hole 231 in the middle and a second eccentric shaft 233 disposed deviating from the middle of the second sector-shaped eccentric piece 232; the second rotating shaft 212 passes through the second shaft hole 231; the first eccentric wheel 22 and the second eccentric wheel 23 rotate in opposite directions; one end of the first connecting rod 25 is sleeved on the first eccentric shaft 223, and the other end of the first connecting rod 25 is pivotally connected to the transmission piston 24; one end of the second connecting rod 26 is sleeved on the second eccentric shaft 233, and the other end of the second connecting rod 26 is pivotally connected to the transmission piston 24.

[0034] Specifically, driven by the first rotating shaft 211 and the second rotating shaft 212, the first eccentric wheel 22 and the second eccentric wheel 23 rotate in opposite directions with the same angular velocity magnitude, causing the first connecting rod 25 and the second connecting rod 26 to simultaneously push the transmission piston 24 away from the drive motor 21 or simultaneously push the transmission piston 24 closer to the drive motor 21; since in the plane direction perpendicular to the first rotating shaft 211, the first connecting rod 25 and the second connecting rod 26 are symmetrically arranged along the axis of the transmission piston 24, the lateral force on the transmission piston 24 is effectively restricted and eliminated.

[0035] Please refer to Figure 6 , in one embodiment, a notch 224 is provided at the edge of the first sector-shaped eccentric piece 222; the first eccentric shaft 223 is arranged close to the notch 224 on the first sector-shaped eccentric piece 222; the structure of the second eccentric wheel 23 is the same as that of the first eccentric wheel 22; thus, the rotation of the first rotating shaft 211 or the second rotating shaft 212 is stable.

[0036] In one embodiment, fixed bearing members 251 are respectively accommodated at both ends of the first connecting rod 25 or the second connecting rod 26; the first eccentric shaft 223 or the second eccentric shaft 233 is inserted into the fixed bearing members 251; the other ends of the first connecting rod 25 and the second connecting rod 26 are pivotally connected to the transmission piston 24 through a pin shaft 252; thus, the friction received by the first connecting rod 25 or the second connecting rod 26 can be reduced, and the service life of the drive mechanism 20 can be improved.

[0037] Please refer to Figure 7 , Figure 8 , Figure 9 , and Figure 10B , in the drive mechanism 20b of another embodiment, the difference is that the first eccentric wheel 22 and the second eccentric wheel 23 rotate in the same direction; a sliding groove 253 is provided at one end of the first connecting rod 25b close to the first eccentric shaft 223; the first eccentric shaft 223 is accommodated in the sliding groove 253.

[0038] Since the first sector eccentric piece 222 and the second sector eccentric piece 232 rotate synchronously, and during the rotation, the first eccentric shaft 223 and the second eccentric shaft 233 are centrosymmetric with respect to the axis of the first rotating shaft 211. At the same time, the orientation of the notch 224 on the first sector eccentric piece 222 is opposite to the orientation of the notch 224 on the second sector eccentric piece 232. During the rotation of the drive motor 21b, the first eccentric shaft 223 moves in the chute 253, causing the first connecting rod 25b to swing. And the first eccentric shaft 223 and the second eccentric shaft 233 move away from or close to the axis of the transmission piston 24 synchronously, making the first connecting rod 25b and the second connecting rod 26 symmetric with respect to the axis of the transmission piston 24. In the plane direction perpendicular to the first rotating shaft 211, the second connecting rod 26 exerts a limiting effect on the transmission piston 24, effectively limiting and eliminating the lateral force on the transmission piston 24.

[0039] Please refer to Figure 9 , in one of the embodiments, a sliding bearing member 254 is sleeved on the first eccentric shaft 223; the width of the chute 253 is equal to or greater than the outer diameter of the sliding bearing member 254; thereby, the wear of the first eccentric shaft 223 during the movement in the chute 253 can be reduced, and the service life of the drive mechanism 20 can be improved.

[0040] Please refer to Figure 3 , the present invention also provides a fascia gun 100, which includes a drive mechanism 20, a main housing assembly 30 for accommodating the drive mechanism 20, a guiding assembly 40 for guiding the transmission piston 24, a massage head 50 connected to the transmission piston 24, a control circuit 60 connected to the drive motor 21, and an energy storage member 70 connected to the drive motor 21.

[0041] Specifically, the control circuit 60 is used to provide a control signal to the drive mechanism 20; the energy storage member 70 is used to provide power to the drive mechanism 20 or the control circuit 60; under the operation of the drive motor 21, the transmission piston 24 drives the massage head 50 to generate an impact motion, producing a massage effect on the human body.

[0042] In one of the embodiments, the driving mechanism 20 further includes a fixed limiting plate 27 connecting to the main body of the driving motor 21; the main housing assembly 30 includes a base housing 31, a handle 32 connecting to the base housing 31, and a side cover 33 buckled on one side of the base housing 31; a support pillar portion 311 connecting to the fixed limiting plate 27 extends inside the base housing 31; specifically, the support pillar portion 311 and the fixed limiting plate 27 are connected and fixed by screw members and rubber rings 28 to reduce the vibration transmitted to the handle 32; optionally, when the transmission piston 24 penetrates into the guiding assembly 40, the driving mechanism 20 can be arranged in the main housing assembly 30 at any angle; preferably, the second rotating shaft 212 is arranged close to the inner side of the base housing 31, and the driving motor 21 is connected to the motor mounting portion 312 on the inner side of the base housing 31; preferably, the energy storage member 70 is a lithium battery and is accommodated in the handle 32.

[0043] In one of the embodiments, the guiding assembly 40 includes a cylinder sleeve 41 sleeved on the transmission piston 24, a first buffer soft sleeve 42 sleeved on the outside of the cylinder sleeve 41, and a positioning ring 43 for limiting the cylinder sleeve 41 or the first buffer soft sleeve 42 on one side of the main housing assembly 30; a second buffer soft sleeve 51 is sleeved on one end of the massage head 50 close to the transmission piston 24.

[0044] During the axial vibration of the massage head 50, through the contact between the first buffer soft sleeve 42 and the second buffer soft sleeve 51, buffer protection is generated for the massage head 50 to avoid damage; specifically, a lubricating hole 411 is provided on the cylinder sleeve 41, which can be used to install ball bearings to ensure the smooth movement of the transmission piston 24.

[0045] In one of the embodiments, the main housing assembly 30 further includes a decorative cover 34 for accommodating the positioning ring 43, a support seat 35 connecting to one side of the base housing 31, and a face cover 36 covering the support seat 35; the control circuit 60 is installed on the support seat 35; thereby ensuring the sealing performance of the muscle massager 100, preventing dust from entering the main housing assembly 30 through the gap between the transmission piston 24 and the cylinder sleeve 41, and facilitating the inspection of the control circuit 60 by opening the face cover 36.

[0046] In this embodiment, by placing the first eccentric wheel and the second eccentric wheel in opposite directions, and connecting the transmission piston to the first eccentric wheel through the first connecting rod and to the second eccentric wheel through the second connecting rod, in the plane perpendicular to the first rotating shaft, due to the limiting effects of the first connecting rod and the second connecting rod on both sides of the transmission piston respectively, the shaking in the direction perpendicular to the linear movement of the transmission piston is avoided, improving the user experience of the muscle massager.

[0047] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0048] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims

1. A driving mechanism, characterized in that, it includes: a driving motor, a first eccentric wheel arranged on one side of the driving motor, a second eccentric wheel arranged on the other side of the driving motor, a transmission piston movably arranged near the driving motor, a first connecting rod connected between the first eccentric wheel and the transmission piston, and a second connecting rod connected between the second eccentric wheel and the transmission piston; a first rotating shaft for driving the first eccentric wheel to rotate is arranged on one side of the driving motor, and a second rotating shaft for driving the second eccentric wheel to rotate is arranged on the other side of the driving motor; in the axial direction of the first rotating shaft, the first eccentric wheel and the second eccentric wheel are placed in opposite directions; the first eccentric wheel includes a first sector-shaped eccentric piece with a first shaft hole in the middle and a first eccentric shaft deviating from the middle of the first sector-shaped eccentric piece; the first rotating shaft is arranged in the first shaft hole; the second eccentric wheel includes a second sector-shaped eccentric piece with a second shaft hole in the middle and a second eccentric shaft deviating from the middle of the second sector-shaped eccentric piece; the second rotating shaft is arranged in the second shaft hole; the first eccentric wheel and the second eccentric wheel rotate in the same direction; a chute is arranged at one end of the first connecting rod close to the first eccentric shaft; the first eccentric shaft is accommodated in the chute; the other end of the first connecting rod is pivotally connected to the transmission piston; one end of the second connecting rod is sleeved on the second eccentric shaft, and the other end of the second connecting rod is pivotally connected to the transmission piston; during the process of the first eccentric wheel and the second eccentric wheel rotating in the same direction, the first eccentric shaft and the second eccentric shaft are centrosymmetric with the axis of the first rotating shaft, and the first eccentric shaft and the second eccentric shaft synchronously move away from or close to the axis of the transmission piston.

2. The driving mechanism according to claim 1, characterized in that, a sliding bearing member is sleeved on the first eccentric shaft; the width of the chute is equal to or greater than the outer diameter of the sliding bearing member.

3. A fascia gun, characterized in that, it includes the driving mechanism according to any one of claims 1 to 2, a main housing assembly for accommodating the driving mechanism, a guiding assembly for guiding the transmission piston, a massage head connected to the transmission piston, a control circuit connected to the driving motor, and an energy storage member connected to the driving motor.

4. The fascia gun according to claim 3, characterized in that, the driving mechanism further includes a fixed limiting plate connected to the main body of the driving motor; the main housing assembly includes a base shell, a handle connected to the base shell, and a side cover buckled on one side of the base shell; a pillar portion connected to the fixed limiting plate extends inside the base shell.

5. The fascia gun according to claim 4, characterized in that, the guiding assembly includes a cylinder sleeve sleeved on the transmission piston, a first buffer soft sleeve sleeved on the outside of the cylinder sleeve, and a positioning ring for limiting the cylinder sleeve or the first buffer soft sleeve on one side of the main housing assembly; a second buffer soft sleeve is sleeved on one end of the massage head close to the transmission piston.

6. The fascia gun according to claim 5, characterized in that, The main housing assembly further includes a decorative cover for accommodating the positioning ring, a support base connected to one side of the base housing, and a face cover covering the support base; the control circuit is installed on the support base.

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