An amplitude-adjustable fascia gun

Abstract

The utility model discloses a fascia gun of can stepless regulation amplitude, including shell, motor and amplitude modulation transmission subassembly, and motor includes stator subassembly and rotor subassembly, and stator subassembly includes motor base, and rotor subassembly includes motor rotating shaft, and the motor rotation slide bushing is installed in the shell, and the motor base is installed in the motor rotation slide bushing, and the motor base is provided with the rotation stop structure who prevents the motor base circumferential rotation between the motor base and the motor rotation slide bushing, and amplitude modulation transmission subassembly includes amplitude modulation guide seat, eccentric slide block and connecting rod, set up amplitude modulation transmission subassembly in fascia gun shell, make the regulating piece drive motor rotating shaft move along the axial through the amplitude knob of fascia gun, make the eccentric slide block in the guide slide groove slide close or away from the axle of motor rotating shaft through the guide hole of eccentric slide block and the cooperation of the guide rod set up on motor rotating shaft, adjust the size of eccentric distance, the utility model discloses can realize stepless regulation fascia gun amplitude.

Description

Technical Field

[0001] This utility model relates to a massage device, and more particularly to a fascia gun. Background Technology

[0002] Conventional fascia guns use a motor to drive an eccentric wheel to rotate, which in turn drives a connecting rod and a massage head at the end of the connecting rod to reciprocate. Since the length of the connecting rod and the eccentricity of the eccentric wheel are fixed, the amplitude of the fascia gun is also fixed. In actual use, different people require different massage depths. If the massage depth is too shallow, it will cause insufficient muscle relaxation, while if the massage depth is too deep, it will cause muscle damage. Therefore, a fascia gun with a fixed amplitude cannot meet diverse needs.

[0003] Therefore, manufacturers have designed fascia guns with variable amplitude, and the main technical solutions are as follows: One is the stepless amplitude reciprocating drive mechanism and fascia gun described in patent document CN116155027A. This fascia gun has an amplitude adjustment mechanism consisting of a swing arm and an adjusting rod. One end of the swing arm is hinged to the adjusting rod, and the other end is hinged to the connecting rod. By adjusting the angle between the adjusting rod and the swing arm, the angle between the swing arm and the connecting rod is changed, thus adjusting the distance between the eccentric wheel and the massage head, thereby achieving amplitude adjustment. The other is a voice coil motor driven fascia gun described in patent document CN219763905U. This fascia gun uses a voice coil motor to drive the massage head. By controlling the circuit board, the current direction and alternation frequency of the voice coil motor are changed, thereby changing the vibration amplitude and frequency of the fascia gun.

[0004] However, both of the aforementioned variable amplitude fascia guns have certain drawbacks. The first type, due to the frequent alternating loads on the hinge point between the swing arm and the adjusting rod, is prone to rapid wear of the hinge pin and bearings. Especially under high-speed vibration conditions, this may cause abnormal noises or increased gaps in the parts, affecting amplitude stability. The second type uses a voice coil motor drive, which requires a feedback circuit to achieve precise amplitude control, resulting in higher circuit complexity and production costs, making it unsuitable for mass production. Utility Model Content

[0005] In order to overcome the technical problems of existing adjustable amplitude fascia guns, this utility model provides a fascia gun with stepless amplitude adjustment.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A fascia gun with infinitely adjustable amplitude includes a housing, a motor, and an amplitude adjustment transmission assembly. The motor includes a stator assembly and a rotor assembly. The stator assembly includes a motor base, and the rotor assembly includes a motor shaft. A motor anti-rotation sleeve is installed inside the housing, and the motor base is installed inside the motor anti-rotation sleeve. An anti-rotation structure is provided between the motor base and the motor anti-rotation sleeve to prevent circumferential rotation of the motor base. The amplitude adjustment transmission assembly includes an amplitude adjustment guide seat, an eccentric slider, and a connecting rod. The amplitude adjustment guide seat has a guide groove, and the eccentric slider is installed in the guide groove. The eccentric slider has a guide hole, and the motor shaft has a guide rod inserted into the guide hole. One end of the motor is connected to a mechanism that drives the entire motor along the axial direction of the motor anti-rotation sleeve. The movable amplitude adjustment knob, when rotated, allows the guide hole and guide rod to cooperate, causing the eccentric slider to slide closer to or further away from the axis of the motor shaft within the guide groove. An amplitude adjustment transmission assembly is installed inside the fascia gun housing. By rotating the amplitude adjustment knob of the fascia gun, the adjusting component drives the motor shaft to move axially. The guide hole of the eccentric slider cooperates with the guide rod on the motor shaft, allowing the eccentric slider to slide closer to or further away from the axis of the motor shaft within the guide groove, thus adjusting the eccentricity. This invention enables stepless adjustment of the fascia gun amplitude. Compared to existing methods that adjust the angle between the massage cylinder and the handle cylinder to change the amplitude, the amplitude adjustment transmission structure has a smaller load, improving structural stability and extending the service life of the fascia gun.

[0007] The amplitude adjustment transmission assembly also includes an amplitude adjustment slider, which is fixedly connected to the motor shaft, and the guide rod is disposed on the amplitude adjustment slider.

[0008] The top of the amplitude adjustment slider is provided with a shaft hole for the motor shaft to pass through, and the side wall is provided with a fixing hole communicating with the shaft hole. A locking bolt is installed in the fixing hole to fix the motor shaft in the shaft hole.

[0009] The axis of the guide groove is perpendicular to the axis of the motor shaft, and the angle β formed by the axis of the guide hole and the axis of the motor is equal to the angle α between the guide rod and the axis of the motor.

[0010] The angle β formed by the axis of the guide hole and the axis of the motor is 45 degrees, and the angle α between the guide rod and the axis of the motor is 45 degrees.

[0011] The anti-rotation structure includes an anti-rotation groove on the motor base and an anti-rotation protrusion on the inner wall of the motor anti-rotation sleeve. The anti-rotation protrusion is parallel to the motor shaft and is embedded in the anti-rotation groove, so that the motor base can only move axially relative to the motor anti-rotation sleeve and cannot rotate circumferentially.

[0012] The motor anti-rotation sleeve is also provided with a limiting step, and the top of the amplitude adjustment guide seat is provided with a boss. A first bearing is fitted on the outside of the boss. After assembly, the side wall of the first bearing abuts against the side wall of the limiting step.

[0013] An adjusting component is also provided between the motor and the amplitude adjustment knob. One end of the motor shaft is rotatably connected to the adjusting component through a second bearing. The outer wall of the adjusting component is provided with an external thread, and the inner wall of the amplitude adjustment knob is provided with a corresponding internal thread. When the amplitude adjustment knob is turned, the internal thread and the external thread cooperate to move the adjusting component along the axial direction of the motor, thereby driving the entire motor to move along the axial direction.

[0014] The side wall of the amplitude adjustment knob is provided with a stop protrusion ring, and the top of the housing is provided with a limiting groove corresponding to the stop protrusion ring. The stop protrusion ring is placed in the limiting groove to prevent the amplitude adjustment knob from moving relative to the housing along the axial direction of the motor when the amplitude adjustment knob is turned.

[0015] The bottom of the eccentric slider is also provided with an eccentric shaft that is connected to the connecting rod. One end of the connecting rod is fitted with a third bearing to form a transmission connection with the eccentric shaft, and the other end is connected to the piston cylinder of the fascia gun through a fourth bearing. When the eccentric slider performs eccentric movement, it drives the connecting rod to reciprocate along an axis perpendicular to the motor.

[0016] The beneficial effects of this utility model are as follows: This utility model incorporates an amplitude adjustment transmission component within the fascia gun housing. By rotating the amplitude adjustment knob of the fascia gun, the adjusting component drives the motor shaft to move axially. The eccentric slider, through its guide hole and the guide rod mounted on the motor shaft, slides within the guide groove, moving closer to or further away from the center of the motor shaft, thus adjusting the eccentricity. This utility model allows for stepless adjustment of the fascia gun's amplitude. Compared to existing methods that adjust the angle between the massage cylinder and the handle cylinder to change the amplitude using a rotating massage cylinder, the amplitude adjustment transmission structure has a lower load, improving structural stability and extending the fascia gun's lifespan. Furthermore, this utility model uses a mechanical structure to adjust the fascia gun's amplitude, which reduces production costs compared to using an electronic control system. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is an exploded view of the present invention.

[0020] Figure 3This is one of the anatomical views of this utility model.

[0021] Figure 4 This is the second anatomical view of this utility model.

[0022] Figure 5 This is one of the sectional views of this utility model.

[0023] Figure 6 This is the second sectional view of this utility model.

[0024] Figure 7 This is a structural diagram of the motor base.

[0025] Figure 8 yes Figure 6 A magnified view of A in the middle.

[0026] Figure 9 yes Figure 6 A magnified view of B in the middle. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0028] These descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0029] Reference Figures 1 to 9A fascia gun with infinitely adjustable amplitude includes a housing 1, a motor 2, and an amplitude adjustment transmission assembly 3. The motor 2 includes a stator assembly 20 and a rotor assembly 21. The stator assembly 20 includes a motor base 200, and the rotor assembly 21 includes a motor shaft 210. A motor anti-rotation sleeve 4 is installed inside the housing 1, and the motor base 200 is installed inside the motor anti-rotation sleeve 4. A spacer is provided between the motor base 200 and the motor anti-rotation sleeve 4 to prevent the motor base 200 from rotating circumferentially. The amplitude adjustment transmission assembly 3 includes an amplitude adjustment guide seat 30, an eccentric slider 31, and a connecting rod 32. The amplitude adjustment guide seat 30 is provided with a guide groove 300, the eccentric slider 31 is installed in the guide groove 300, the eccentric slider 31 is provided with a guide hole 310, the motor shaft 210 is provided with a guide rod 211 inserted into the guide hole 310, and one end of the motor 2 is connected to an amplitude adjustment knob 5 that drives the entire motor to move axially along the motor anti-rotation sleeve 4. Generally, the axis of the motor anti-rotation sleeve 4 is parallel to the axis of the motor 2. When the amplitude adjustment knob 5 is rotated, the guide hole 310 cooperates with the guide rod 211 to make the eccentric slider 31 slide closer to or away from the axis of the motor shaft 210 in the guide groove 300. This utility model sets an amplitude adjustment transmission component in the fascia gun shell. By turning the amplitude adjustment knob of the fascia gun, the adjustment component drives the motor shaft to move axially. Through the guide hole of the eccentric slider and the guide rod set on the motor shaft, the eccentric slider slides closer to or away from the axis of the motor shaft in the guide groove, adjusting the size of the eccentricity. This utility model can realize stepless adjustment of the amplitude of the fascia gun. Compared with the existing scheme of changing the amplitude by adjusting the angle between the massage cylinder and the handle cylinder, the amplitude adjustment transmission structure has a smaller load, improves the stability of the structure, and extends the service life of the fascia gun. In addition, this utility model uses a mechanical structure to adjust the amplitude of the fascia gun, which reduces the production cost of the fascia gun compared with the use of an electronic control system.

[0030] The motor in this embodiment is an external rotor motor. The stator assembly of the motor includes a motor base (i.e., stator housing), a coil frame fixed on the stator housing, and a stator winding fixed inside the coil frame. When the motor is working, the stator assembly does not rotate. The rotor assembly includes a rotor housing, a permanent magnet fixed inside the rotor housing, and a motor shaft fixedly connected to the rotor housing. When the motor is working, the rotor assembly rotates as a whole. A bearing is installed between the motor shaft and the motor base. The stator assembly and the rotor assembly only produce relative circumferential rotation and do not perform relative axial movement.

[0031] The amplitude adjustment transmission assembly 3 further includes an amplitude adjustment slider 33, which is fixedly connected to the motor shaft 210. The guide rod 211 is disposed on the amplitude adjustment slider 33. The top of the amplitude adjustment slider 33 is provided with a shaft hole through which the motor shaft 210 passes, and the side wall is provided with a fixing hole communicating with the shaft hole. A locking bolt for fixing the motor shaft 210 in the shaft hole is installed in the fixing hole. In this embodiment, the amplitude adjustment slider is installed at the bottom of the motor shaft. Alternatively, the bottom of the motor shaft can be bent to form a guide rod that can pass through the guide hole.

[0032] The axis of the guide groove 300 is perpendicular to the axis of the motor shaft 210. The angle β formed by the axis of the guide hole 310 and the axis of the motor 2 is equal to the angle α between the guide rod 211 and the axis of the motor 2. By setting the angle β between the axis of the guide hole and the axis of the motor 2 and the angle α between the guide rod 211 and the axis of the motor 2 to the same angle, it is ensured that after the guide rod 211 passes through the guide hole, the shaft hole on the amplitude adjustment slider is parallel to the axis of the motor.

[0033] The angle β formed by the axis of the guide hole 310 and the axis of the motor 2 is 45 degrees, and the angle α between the guide rod 211 and the axis of the motor 2 is 45 degrees. In order to achieve equal adjustment of the adjustment range of the amplitude adjustment knob and the adjustment range of the eccentricity, the angle α between the guide rod 211 and the axis of the motor 2, and the angle β formed by the axis of the guide hole 310 and the axis of the motor 2 are selected as 45 degrees. Alternatively, the above-mentioned angles α and β can be set to any angle between 0 and 90 degrees.

[0034] The anti-rotation structure includes an anti-rotation groove 201 on the motor base 200 and an anti-rotation protrusion 40 on the inner wall of the motor anti-rotation sleeve 4. The anti-rotation protrusion 40 is parallel to the motor shaft 210 and is embedded in the anti-rotation groove 201, so that the motor base 200 can only move axially relative to the motor anti-rotation sleeve 4 and cannot rotate circumferentially. Conventional motors use a rotor assembly that slides axially, but this technical solution reduces the motor's operating efficiency. Specifically, because the rotor assembly moves vertically along the axial direction, the air gap between the rotor magnet and the stator winding increases, which reduces the magnetic force of the electromagnetic field generated by the stator assembly on the rotor assembly, thus affecting the motor's operating efficiency. Therefore, in order to avoid the above-mentioned problems with the fascia gun, this embodiment adopts a solution where the entire motor slides axially, resulting in higher motor operating efficiency.

[0035] The motor anti-rotation sleeve 4 is also provided with a limiting step 41. The top of the amplitude adjustment guide seat 30 is provided with a boss 301. A first bearing 6 is fitted on the outside of the boss 301. After assembly, the side wall of the first bearing 6 abuts against the side wall of the limiting step 41.

[0036] An adjusting component 7 is also provided between the motor 2 and the amplitude adjustment knob 5. One end of the motor shaft 210 is rotatably connected to the adjusting component 7 through a second bearing 8. The outer wall of the adjusting component 7 is provided with an external thread, and the inner wall of the amplitude adjustment knob 5 is provided with a corresponding internal thread. When the amplitude adjustment knob 5 is turned, the internal thread and the external thread cooperate to move the adjusting component 7 along the axial direction of the motor 2, thereby driving the entire motor 2 to move axially. In specific implementation, the adjustable amplitude can be changed by changing the spacing of the threads between the amplitude adjustment knob 5 and the adjusting component 7. Correspondingly, the length of the guide rod and the guide groove also needs to be increased to accommodate a larger amplitude adjustment range.

[0037] The side wall of the amplitude adjustment knob 5 is provided with a stop protrusion ring 50, and the top of the outer shell 1 is provided with a limiting groove 10 corresponding to the stop protrusion ring 50. The stop protrusion ring 50 is placed in the limiting groove 10 to prevent the amplitude adjustment knob 5 from moving relative to the outer shell 1 along the axial direction of the motor 2 when the amplitude adjustment knob 5 is turned.

[0038] The bottom of the eccentric slider 31 is also provided with an eccentric shaft 311 that is connected to the connecting rod 32 in a transmission manner. One end of the connecting rod 32 is fitted with a third bearing to form a transmission connection with the eccentric shaft 311, and the other end is connected to the piston cylinder of the fascia gun through a fourth bearing. When the eccentric slider 31 performs eccentric movement, it drives the connecting rod 32 to reciprocate along an axis perpendicular to the motor 2.

[0039] When using the fascia gun, turn the amplitude adjustment knob so that the internal thread on the knob engages with the external thread on the adjustment component. Because the outer casing has a limiting groove, the adjustment component moves downwards along the motor's axis, causing the entire motor connected to the adjustment component to move downwards along the motor's axis as well. This drives the amplitude adjustment slider fixed at the bottom of the motor shaft downwards. At this time, the bottom surface of the guide rod of the amplitude adjustment slider presses against the eccentric slider. Since the eccentric slider is constrained within the guide groove, it can only move along the direction of the guide groove. Therefore, the downward pressure of the guide rod forces the eccentric slider to slide along the guide groove towards the center of the motor shaft, reducing the eccentricity of the fascia gun. Conversely, when the amplitude adjustment knob is turned so that the adjustment component moves upwards along the motor's axis, the entire motor connected to the adjustment component moves upwards along the motor's axis as well. This drives the amplitude adjustment slider fixed at the bottom of the motor shaft upwards. The top surface of the guide rod of the amplitude adjustment slider presses against the eccentric slider, causing the eccentric slider to move away from the center of the motor shaft along the guide groove, increasing the eccentricity of the fascia gun.

[0040] In this invention, the term "multiple" refers to two or more items unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] It should be noted that when a component is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0042] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fascia gun with infinitely adjustable amplitude, characterized in that... The device includes a housing (1), a motor (2), and an amplitude modulation transmission assembly (3). The motor (2) includes a stator assembly (20) and a rotor assembly (21). The stator assembly (20) includes a motor base (200), and the rotor assembly (21) includes a motor shaft (210). A motor anti-rotation sleeve (4) is installed inside the housing (1). The motor base (200) is installed inside the motor anti-rotation sleeve (4). An anti-rotation structure is provided between the motor base (200) and the motor anti-rotation sleeve (4) to prevent the motor base (200) from rotating circumferentially. The amplitude modulation transmission assembly (3) includes an amplitude modulation guide seat (30), an eccentric slider (31), and a connecting rod (32). The amplitude adjustment guide seat (30) is provided with a guide groove (300), the eccentric slider (31) is installed in the guide groove (300), the eccentric slider (31) is provided with a guide hole (310), the motor shaft (210) is provided with a guide rod (211) inserted into the guide hole (310), one end of the motor (2) is connected to an amplitude adjustment knob (5) that drives the whole motor to move along the axial direction of the motor anti-rotation sleeve (4). When the amplitude adjustment knob (5) is rotated, the guide hole (310) and the guide rod (211) cooperate to make the eccentric slider (31) slide closer to or away from the axis of the motor shaft (210) in the guide groove (300).

2. The fascia gun with infinitely adjustable amplitude according to claim 1, characterized in that... The amplitude adjustment transmission assembly (3) further includes an amplitude adjustment slider (33), which is fixedly connected to the motor shaft (210), and the guide rod (211) is disposed on the amplitude adjustment slider (33).

3. The fascia gun with infinitely adjustable amplitude according to claim 2, characterized in that... The top of the amplitude adjustment slider (33) is provided with a shaft hole for the motor shaft (210) to pass through, and the side wall is provided with a fixing hole communicating with the shaft hole. A locking bolt for fixing the motor shaft (210) in the shaft hole is installed in the fixing hole.

4. The fascia gun with infinitely adjustable amplitude according to claim 3, characterized in that... The axis of the guide groove (300) is perpendicular to the axis of the motor shaft (210), and the angle β formed by the axis of the guide hole (310) and the axis of the motor (2) is equal to the angle α between the guide rod (211) and the axis of the motor (2).

5. The fascia gun with infinitely adjustable amplitude according to claim 4, characterized in that... The angle β formed by the axis of the guide hole (310) and the axis of the motor (2) is 45 degrees, and the angle α between the guide rod (211) and the axis of the motor (2) is 45 degrees.

6. The fascia gun with infinitely adjustable amplitude according to claim 1, characterized in that... The anti-rotation structure includes an anti-rotation groove (201) provided on the motor base (200) and an anti-rotation protrusion (40) provided on the inner wall of the motor anti-rotation sleeve (4). The anti-rotation protrusion (40) is parallel to the motor shaft (210). The anti-rotation protrusion (40) is embedded in the anti-rotation groove (201), so that the motor base (200) can only move axially relative to the motor anti-rotation sleeve (4) and cannot rotate circumferentially.

7. The fascia gun with infinitely adjustable amplitude according to claim 6, characterized in that... The motor anti-rotation sleeve (4) is also provided with a limiting step (41). The top of the amplitude adjustment guide seat (30) is provided with a boss (301). A first bearing (6) is fitted on the outside of the boss (301). After assembly, the side wall of the first bearing (6) abuts against the side wall of the limiting step (41).

8. The fascia gun with infinitely adjustable amplitude according to claim 1, characterized in that... An adjusting component (7) is also provided between the motor (2) and the amplitude adjustment knob (5). One end of the motor shaft (210) is rotatably connected to the adjusting component (7) through the second bearing (8). The outer wall of the adjusting component (7) is provided with an external thread, and the inner wall of the amplitude adjustment knob (5) is provided with a corresponding internal thread. When the amplitude adjustment knob (5) is turned, the internal thread and the external thread cooperate to make the adjusting component (7) move along the axial direction of the motor (2), thereby driving the motor (2) to move along the axial direction as a whole.

9. The fascia gun with infinitely adjustable amplitude according to claim 8, characterized in that... The side wall of the amplitude adjustment knob (5) is provided with a stop ring (50), and the top of the housing (1) is provided with a limiting groove (10) corresponding to the stop ring (50). The stop ring (50) is placed in the limiting groove (10) to prevent the amplitude adjustment knob (5) from moving relative to the housing (1) along the axial direction of the motor (2) when the amplitude adjustment knob (5) is turned.

10. The fascia gun with infinitely adjustable amplitude according to claim 1, characterized in that... The bottom of the eccentric slider (31) is also provided with an eccentric shaft (311) that is connected to the connecting rod (32) for transmission. One end of the connecting rod (32) is fitted with a third bearing to form a transmission connection with the eccentric shaft (311), and the other end is connected to the piston cylinder of the fascia gun through a fourth bearing. When the eccentric slider (31) performs eccentric movement, it drives the connecting rod (32) to reciprocate along the axis perpendicular to the motor (2).

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