Variable amplitude adjusting mechanism and fascia gun

Abstract

The utility model relates to the field of fascia guns, in particular to a variable amplitude adjusting mechanism and a fascia gun, the variable amplitude adjusting mechanism is small in occupied space and capable of achieving amplitude adjustment, the variable amplitude adjusting mechanism comprises a piston rod, a transmission arm and a rotatable eccentric wheel driven by a motor, and the eccentric wheel comprises a main eccentric wheel and an auxiliary eccentric wheel; wherein an input hole of the main eccentric wheel is formed in a motor output shaft of the motor, an output shaft of the main eccentric wheel is hinged to an input port of the auxiliary eccentric wheel, an output shaft of the auxiliary eccentric wheel is hinged to the other end of the transmission arm, and the axis of the output shaft of the auxiliary eccentric wheel is parallel to the axis of the output shaft of the main eccentric wheel; the eccentric wheel further comprises an auxiliary eccentric wheel adjusting mechanism, the auxiliary eccentric wheel adjusting mechanism is connected with the auxiliary eccentric wheel, and the auxiliary eccentric wheel adjusting mechanism drives the auxiliary eccentric wheel to rotate so as to adjust the distance between the output shaft of the motor and the output shaft of the auxiliary eccentric wheel, so that the sliding amplitude of the piston rod can be changed. The utility model is particularly suitable for the field of fascia guns.

Description

Technical Field

[0001] The utility model relates to the field of fascia guns, in particular to a variable amplitude adjustment mechanism and a fascia gun. Background Art

[0002] The fascia gun, also known as the deep myofascial impactor, is a soft tissue massage tool that relaxes the body's soft tissues through high-frequency impacts. The existing fascia gun drives the massage head to make linear reciprocating motion through the piston. The massage head contacts the human body and generates high-frequency vibrations that act on the deep muscles, which reduces local tissue tension, relieves pain, and promotes blood circulation. With the existing fascia gun, users can choose the appropriate fascia gun amplitude depth for massage therapy according to their own situation. For example, professional athletes need a deep amplitude depth to relieve muscles after exercise. When ordinary consumers, especially novices, use fascia guns, they need to use fascia guns with shallow amplitude depth at first, and then gradually deepen the amplitude as needed. However, most of the fascia guns or muscle massagers on the market now use a crank slider mechanism and an eccentric wheel to realize the rotation conversion of the motor to realize the reciprocating motion of the massage head. Since the eccentric distance on the eccentric wheel is fixed, the striking stroke of the reciprocating motion of the fascia gun is fixed, so the amplitude cannot be changed, and it cannot meet more user usage scenarios.

[0003] Taking the patent with publication number CN217091371U as an example, it discloses a fascia gun that uses a rotating scroll gear to adjust the amplitude. The solution is mainly to make the cylindrical rack meshing with the scroll gear move axially, thereby changing the distance from the connection between the connecting rod and the cylindrical rack to the center of the scroll gear, thereby changing the eccentricity of the rotating component and finally changing the amplitude of the piston rod. However, since the cylindrical rack needs to occupy a large space in the length direction, the relationship between the compact layout of the fascia gun and the amplitude adjustment requirements cannot be taken into account in the small-sized fascia gun product. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a variable amplitude adjustment mechanism and a fascia gun which occupy a small space and can realize amplitude adjustment.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a variable amplitude adjustment mechanism, including a piston rod, a transmission arm and a rotatable eccentric wheel driven by a motor, one end of the transmission arm is hinged to the piston rod, and the other end is hinged to the eccentric wheel, the piston rod is slidingly arranged, and the eccentric wheel includes a main eccentric wheel and a secondary eccentric wheel; wherein, the input hole of the main eccentric wheel is installed on the motor output shaft of the motor, the output shaft of the main eccentric wheel is hinged to the input port of the secondary eccentric wheel, the output shaft of the secondary eccentric wheel is hinged to the other end of the transmission arm, and the axis of the output shaft of the secondary eccentric wheel is arranged parallel to the axis of the output shaft of the main eccentric wheel; the eccentric wheel also includes a secondary eccentric wheel adjustment mechanism, the secondary eccentric wheel adjustment mechanism is connected to the secondary eccentric wheel, and the secondary eccentric wheel adjustment mechanism drives the secondary eccentric wheel to rotate and then adjusts the distance between the motor output shaft and the output shaft of the secondary eccentric wheel to achieve the change of the sliding amplitude of the piston rod. In this solution, the distance between the motor output shaft and the output shaft of the secondary eccentric wheel is the eccentric distance. The eccentricity is actually the vector sum of the eccentricities of the main eccentric wheel and the auxiliary eccentric wheel. The eccentricities of the main eccentric wheel and the auxiliary eccentric wheel are constant, but the rotation of the auxiliary eccentric wheel adjusts the distance between the motor output shaft and the auxiliary eccentric wheel output shaft, thereby adjusting the eccentricity and the amplitude.

[0006] As a preferred structure of the secondary eccentric wheel, the secondary eccentric wheel can be selected to be a sleeve structure, the output shaft of the secondary eccentric wheel is the outer periphery of the sleeve, and the input hole of the secondary eccentric wheel is eccentrically arranged relative to the axis of the sleeve structure. The sleeve structure reduces the overall mass of the secondary eccentric wheel while ensuring that the secondary eccentric wheel can achieve basic eccentric adjustment, which is beneficial to the lightweight of the variable amplitude adjustment mechanism. Among them, the output shaft of the secondary eccentric wheel is coaxially arranged with the axis of the sleeve structure, that is, the transmission arm is coaxially arranged with the axis of the sleeve structure, and thus the additionally arranged output shaft of the secondary eccentric wheel is omitted in the specific structure, so that the outer peripheral contour of the secondary eccentric wheel functionally replaces the output shaft of the secondary eccentric wheel, and the structure of the secondary eccentric wheel is further simplified.

[0007] Furthermore, it is preferred to include a transmission arm bearing, and the outer periphery of the secondary eccentric wheel is hinged to the transmission arm through the transmission arm bearing, thereby reducing the wear between the transmission arm and the secondary eccentric wheel.

[0008] As an embodiment of the secondary eccentric wheel adjustment mechanism, the secondary eccentric wheel adjustment mechanism can be selected to include a reduction adjustment motor, which drives the secondary eccentric wheel to rotate. The reduction adjustment motor realizes the rotation of the secondary eccentric wheel by rotating, and then adjusts the distance between the motor output shaft and the secondary eccentric wheel output shaft to adjust the sliding amplitude of the piston rod. Since the reduction adjustment motor needs to ensure that it moves along with the movement of the secondary eccentric wheel to achieve real-time adjustment, it is preferred that the reduction adjustment motor is fixedly arranged on the transmission arm, and the swing of the transmission arm is consistent with the swing of the secondary eccentric wheel, which is also convenient for fixing the reduction adjustment motor.

[0009] Furthermore, as a preferred structure that matches the above-mentioned speed reduction adjustment motor and thus realizes the adjustment of the sliding amplitude, the following scheme can be selected: the secondary eccentric wheel adjustment mechanism includes a secondary eccentric wheel adjustment disk, the output shaft of the speed reduction adjustment motor is installed in the input hole of the secondary eccentric wheel adjustment disk, the output shaft end of the secondary eccentric wheel adjustment disk is connected to the secondary eccentric wheel, and the input hole of the secondary eccentric wheel adjustment disk and the output shaft end of the secondary eccentric wheel adjustment disk are eccentrically arranged. The output shaft of the speed reduction adjustment motor rotates to drive the input hole of the secondary eccentric wheel adjustment disk, and the secondary eccentric wheel adjustment disk rotates accordingly, thereby driving the output shaft end of the secondary eccentric wheel adjustment disk and the secondary eccentric wheel to rotate, thereby realizing adjustment. Furthermore, as a specific connection structure between the secondary eccentric wheel and the secondary eccentric wheel adjustment disk, the following scheme can be selected: the secondary eccentric wheel includes an adjustment mounting seat for connecting to the output shaft end of the secondary eccentric wheel adjustment disk, and the output shaft end of the secondary eccentric wheel adjustment disk is hinged to the adjustment mounting seat.

[0010] In order to realize the control of the deceleration regulating motor, the auxiliary eccentric wheel regulating mechanism preferably includes a PCB control board, and the tail wiring of the deceleration regulating motor is electrically connected to the PCB control board. The PCB control board is used to output a signal to control the deceleration regulating motor, thereby realizing the adjustment of the amplitude.

[0011] Preferably, the secondary eccentric adjustment mechanism comprises an eccentric bearing, and the secondary eccentric is hinged to the main eccentric output shaft via the eccentric bearing, thereby reducing the wear between the secondary eccentric and the main eccentric output shaft.

[0012] The fascia gun includes a sliding sleeve, and the piston rod is slidably arranged in the sliding sleeve. By applying the variable amplitude adjustment mechanism to the fascia gun product, it is possible to arrange the corresponding amplitude adjustment mechanism in the compact fascia gun product, thereby realizing the adjustment of the massage amplitude of the fascia gun, especially allowing the fascia gun to flexibly adjust the amplitude of the massage head according to the massage needs of the user, greatly improving the user experience of the fascia gun.

[0013] The beneficial effect of the utility model is that the amplitude can be adjusted by adjusting the distance between the motor output shaft and the auxiliary eccentric output shaft. The method of driving the auxiliary eccentric to rotate saves more space than the existing rack method, so that a small-sized fascia gun can also use the corresponding amplitude adjustment mechanism to achieve flexible adjustment of the massage amplitude. The utility model is particularly suitable for the field of fascia guns. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an embodiment of the utility model applied to a fascia gun product.

[0015] Figure 2 yes Figure 1Schematic diagram of the embodiment of the invention when the amplitude is maximum.

[0016] Figure 3 yes Figure 1 Schematic diagram of the embodiment of the invention when the amplitude is minimum.

[0017] Marked in the figure are: motor 1, main eccentric wheel 2, main eccentric wheel output shaft 21, transmission arm 3, transmission arm bearing 4, secondary eccentric wheel 5, eccentric wheel bearing 6, secondary eccentric wheel adjustment disk 7, reduction adjustment motor 8, tail cable 81, PCB control board 9, piston rod 10, and sliding sleeve 101. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] like Figures 1 to 3 The example shown is an embodiment of a variable amplitude adjustment mechanism applied to a fascia gun product. The piston rod 10 is slidably arranged in the sleeve 101 to realize linear motion output, and the massage head can be connected to the piston rod 10 as needed. One end of the transmission arm 3 is hinged to the piston rod 10, and the other end of the transmission arm 3 is first sleeved with the transmission arm bearing 4, and then connected to the secondary eccentric wheel 5. The secondary eccentric wheel input hole of the secondary eccentric wheel 5 is provided with the main eccentric wheel output shaft 21 of the main eccentric wheel 2, and the main eccentric wheel input hole of the main eccentric wheel 2 is provided with the motor output shaft of the motor 1. During actual operation, the motor output shaft of the motor 1 drives the main eccentric wheel 2 to rotate, and the rotating main eccentric wheel 2 drives the secondary eccentric wheel 5 to rotate through the main eccentric wheel output shaft 21, and then realizes the swing of the transmission arm 3 and the reciprocating motion of the piston rod 10. In this scheme, the eccentric wheel used to produce the reciprocating motion effect of the piston rod 10 mainly includes the main eccentric wheel 2 and the secondary eccentric wheel 5. Both the main eccentric wheel 2 and the auxiliary eccentric wheel 5 have input ends and output ends that are arranged on different axes from each other, thereby achieving the effect of the eccentric arrangement.

[0020] In this solution, the actual eccentricity is the distance between the motor output shaft and the secondary eccentric output shaft, and more specifically, is the sum of the eccentricity of the main eccentric 2 and the eccentricity of the secondary eccentric 5. Since the angle of the secondary eccentric 5 relative to the main eccentric 2 can be adjusted by rotation, the actual eccentricity described in this solution is the vector sum of the eccentricity of the main eccentric 2 and the eccentricity of the secondary eccentric 5, rather than a simple addition of the lengths. Figure 2 As shown, the actual eccentricity is at its maximum, corresponding to the state with the largest amplitude. Figure 3The figure shows that the actual eccentricity is at the minimum, corresponding to the state of the minimum amplitude. In this embodiment, the secondary eccentric wheel 5 is a sleeve structure, and its secondary eccentric wheel output shaft is coaxially arranged with the axis of the sleeve structure, and the secondary eccentric wheel input hole is eccentrically arranged relative to the axis of the sleeve structure. Therefore, the distance between the axis of the sleeve structure and the motor output shaft is the actual eccentricity, and the actual eccentricity will change as the secondary eccentric wheel 5 rotates around the axis of the sleeve structure.

[0021] As a specific implementation structure for driving the auxiliary eccentric wheel 5 to realize rotation, the auxiliary eccentric wheel adjustment mechanism can specifically select the following structural forms. Figures 1 to 3 As shown, it includes a secondary eccentric wheel adjustment disk 7, the input hole of which is provided with the output shaft of a speed reduction adjustment motor 8, the output shaft end of the secondary eccentric wheel adjustment disk 7 is hinged with the adjustment mounting seat on the secondary eccentric wheel 5, and the input hole of the secondary eccentric wheel adjustment disk 7 and the output shaft end of the secondary eccentric wheel adjustment disk 7 are eccentrically arranged. Figures 1 to 3 As shown, the adjustment mounting seat is a protruding mounting seat on the top of the side wall of the secondary eccentric wheel 5, the input hole of the secondary eccentric wheel adjustment disk 7 is located at the central axis, and the output shaft end of the secondary eccentric wheel adjustment disk 7 is located at the position of the secondary eccentric wheel adjustment disk 7 near the side. In actual use, the output shaft of the reduction adjustment motor 8 drives the secondary eccentric wheel adjustment disk 7 to rotate, and the rotating secondary eccentric wheel adjustment disk 7 drives the secondary eccentric wheel 5 to rotate through the adjustment mounting seat on the secondary eccentric wheel 5, thereby realizing the actual eccentricity adjustment. Such a structural design can reduce the difficulty of assembly, allowing the product to be quickly assembled during production, and is also convenient for later maintenance and disassembly. Preferably, the secondary eccentric wheel adjustment mechanism includes an eccentric wheel bearing 6, and the secondary eccentric wheel 5 is hinged to the main eccentric wheel output shaft 21 through the eccentric wheel bearing 6, thereby reducing the wear of the secondary eccentric wheel 5 and the main eccentric wheel output shaft 21.

[0022] In order to realize the real-time control of the amplitude adjustment, a PCB control board 9 can be optionally provided, and the tail cable 81 of the deceleration adjustment motor 8 is electrically connected to the PCB control board 9. Figures 1 to 3 As shown, the deceleration adjustment motor 8 is fixedly arranged on the transmission arm 3. In actual operation, the deceleration adjustment motor 8 swings back and forth with the transmission arm 3. After receiving the instruction from the user, the PCB control board 9 sends a signal to the deceleration adjustment motor 8 and starts the deceleration adjustment motor 8. The tail cable 81 of the motor 8 needs to have a margin in length to ensure that even when the deceleration adjustment motor 8 moves to the farthest end from the PCB control board 9, the tail cable 81 is still in a bent and unstraightened state to prevent the tail cable 81 from being broken due to insufficient length.

Claims

1. A variable amplitude adjustment mechanism, comprising a piston rod (10), a transmission arm (3) and a rotatable eccentric wheel driven by a motor (1), wherein one end of the transmission arm (3) is hinged to the piston rod (10) and the other end is hinged to the eccentric wheel, and the piston rod (10) is slidably arranged, characterized in that: The eccentric wheel comprises a main eccentric wheel (2) and a secondary eccentric wheel (5); wherein the input hole of the main eccentric wheel (2) is mounted on the motor output shaft of the motor (1), the output shaft of the main eccentric wheel (2) is hinged to the input port of the secondary eccentric wheel (5), the output shaft of the secondary eccentric wheel (5) is hinged to the other end of the transmission arm (3), and the axis of the output shaft of the secondary eccentric wheel is arranged parallel to the axis of the output shaft (21) of the main eccentric wheel; The eccentric wheel also includes a secondary eccentric wheel adjustment mechanism, which is connected to the secondary eccentric wheel (5). The secondary eccentric wheel adjustment mechanism drives the secondary eccentric wheel (5) to rotate and thereby adjusts the distance between the motor output shaft and the output shaft of the secondary eccentric wheel to achieve a change in the sliding amplitude of the piston rod (10).

2. The variable amplitude adjustment mechanism according to claim 1, characterized in that: The secondary eccentric wheel (5) is a sleeve structure, the output shaft of the secondary eccentric wheel is the outer periphery of the sleeve, and the input hole of the secondary eccentric wheel is eccentrically arranged relative to the axis of the sleeve structure.

3. The variable amplitude adjustment mechanism according to claim 2, characterized in that: It comprises a transmission arm bearing (4), and the outer periphery of the secondary eccentric wheel (5) is hinged to the transmission arm (3) through the transmission arm bearing (4).

4. The variable amplitude adjustment mechanism according to any one of claims 1 to 3, characterized in that: The secondary eccentric wheel adjustment mechanism comprises a speed reduction adjustment motor (8), and the speed reduction adjustment motor (8) drives the secondary eccentric wheel (5) to rotate.

5. The variable amplitude adjustment mechanism according to claim 4, characterized in that: The secondary eccentric wheel adjustment mechanism comprises a secondary eccentric wheel adjustment disk (7), the output shaft of the reduction adjustment motor (8) is installed in the input hole of the secondary eccentric wheel adjustment disk (7), the output shaft end of the secondary eccentric wheel adjustment disk (7) is connected to the secondary eccentric wheel (5), and the input hole of the secondary eccentric wheel adjustment disk (7) and the output shaft end of the secondary eccentric wheel adjustment disk (7) are eccentrically arranged.

6. The variable amplitude adjustment mechanism according to claim 5, characterized in that: The secondary eccentric wheel (5) comprises an adjustment mounting seat for connecting to the output shaft end of the secondary eccentric wheel adjustment disc (7); the output shaft end of the secondary eccentric wheel adjustment disc (7) is hinged to the adjustment mounting seat.

7. The variable amplitude adjustment mechanism according to claim 4, characterized in that: The speed reduction regulating motor (8) is fixedly arranged on the transmission arm (3).

8. The variable amplitude adjustment mechanism according to claim 7, characterized in that: The auxiliary eccentric wheel adjustment mechanism comprises a PCB control board (9), and the tail wiring (81) of the speed reduction adjustment motor (8) is electrically connected to the PCB control board (9).

9. The variable amplitude adjustment mechanism according to claim 4, characterized in that: The secondary eccentric wheel adjustment mechanism comprises an eccentric wheel bearing (6), and the secondary eccentric wheel (5) is hinged to the main eccentric wheel output shaft (21) through the eccentric wheel bearing (6).

10. A fascia gun, comprising a sliding sleeve (101), characterized in that: It also comprises a variable amplitude adjustment mechanism as claimed in any one of claims 1 to 9, wherein the piston rod (10) is slidably disposed in the sliding sleeve (101).

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