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 capable of conveniently realizing amplitude adjustment and a fascia gun, which comprise a sliding shaft, a connecting rod and a rotatable eccentric wheel, one end of the connecting rod is hinged with the sliding shaft, the sliding shaft is arranged in a sliding manner, the eccentric wheel comprises an eccentric input hole, an eccentric shaft and an adjusting wheel, and an eccentric ring is arranged at the bottom of the adjusting wheel. An adjusting eccentric shaft is arranged at the top of the adjusting wheel, the eccentric ring is rotationally arranged on the eccentric shaft in a sleeving mode, the adjusting eccentric shaft and the eccentric shaft are coaxially arranged, and one end of the connecting rod is hinged to the eccentric ring; the adjusting wheel is rotated to adjust the distance between the eccentric input hole and the geometric center axis of the bottom of the adjusting wheel so as to drive the sliding amplitude of the sliding shaft to be adjusted. The scheme is particularly suitable for fascia gun products needing real-time amplitude adjustment.

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 application with publication number US11478400B1 as an example, its scheme discloses a percussion massager with selectable stroke length. Specifically, it includes a motor bracket, an inner gear ring is arranged inside the motor bracket, an eccentric wheel is installed on the motor rotating shaft, a small gear meshing with the inner gear ring is rotatably installed on the eccentric wheel, and a reciprocating swing arm is rotatably connected to the small gear; after the eccentric wheel is driven by the motor to rotate, the small gear rotates along the inner gear ring to realize the reciprocating swing of the swing arm, and the stroke adjustment rod realizes the position change of the inner gear ring after the position change, so that the position of the small gear along the rotation of the inner gear ring changes, thereby realizing the step-by-step adjustment of the amplitude. However, the core of its scheme lies in changing the position of the gear ring, in order to realize the rotation position change adjustment of the planetary gear, rather than directly changing the distance between the axis of the connection point between the planetary gear and the swing arm relative to the motor axis. At the same time, its adjustment amplitude range is also very limited. 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 can conveniently 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 sliding shaft, a connecting rod and a rotatable eccentric wheel, one end of the connecting rod is hinged with the sliding shaft, the sliding shaft is slidingly arranged, the eccentric wheel includes an eccentric input hole and an eccentric shaft, including an adjusting wheel, an eccentric ring is arranged at the bottom of the adjusting wheel, an adjusting eccentric shaft is arranged at the top of the adjusting wheel, the eccentric ring is rotatably sleeved and arranged on the eccentric shaft, the adjusting eccentric shaft is coaxially arranged with the eccentric shaft, and one end of the connecting rod is hinged with the eccentric ring; the adjusting wheel is rotated to adjust the distance between the eccentric input hole and the geometric center axis of the bottom of the adjusting wheel to drive the sliding amplitude of the sliding shaft to be adjusted. Among them, the distance between the eccentric input hole and the geometric center axis of the bottom of the adjusting wheel is the actual eccentricity. Due to the existence of the eccentric ring, by rotating the adjusting wheel, the distance between the eccentric input hole and the geometric center axis of the bottom of the adjusting wheel changes, thereby realizing the adjustment of the above-mentioned eccentricity, thereby realizing the adjustment of the sliding amplitude of the sliding shaft.

[0006] In order to facilitate the rotation adjustment of the adjusting wheel, the following scheme can be selected: including an adjusting gear, the end of the adjusting eccentric shaft is provided with an end gear meshing with the adjusting gear, the end gear and the adjusting gear have the same number of teeth and module, and the adjusting gear is used to drive the adjusting wheel to rotate through the end gear. By rotating the adjusting gear, the adjusting wheel can be directly rotated, thereby changing the actual eccentricity. Because the end gear and the adjusting gear have the same number of teeth and module, the position of the corresponding striking point is consistent when the end gear rotates around the adjusting gear.

[0007] As a preferred structure for driving the adjusting gear to rotate, the following scheme can be selected: including a turbine, the adjusting gear is arranged on the turbine, and the turbine and the adjusting gear are arranged coaxially. On this basis, a turbine worm mechanism can also be constructed for adjustment, that is, including a worm that cooperates with the turbine, and the worm is used to drive the turbine to rotate and then drive the adjusting wheel to rotate. When the user rotates the adjusting worm to rotate the turbine, the relative position of the adjusting wheel turbine is changed. The change in relative position corresponds to different amplitudes, thereby achieving the ability to adjust the amplitude during use.

[0008] In order to ensure that the adjusting wheel is in a stable motion trajectory when the adjusting wheel revolves around the adjusting gear, the following solution can be selected: including an adjusting wheel limiting sleeve, the adjusting wheel limiting sleeve is rotatably arranged on the turbine through a rotating shaft, the rotating shaft is coaxially arranged with the turbine and the eccentric input hole, and the adjusting eccentric shaft is rotatably arranged in the adjusting wheel limiting sleeve. The adjusting wheel limiting sleeve rotates around the turbine, and at the same time, since the adjusting eccentric shaft is arranged in the through hole of the adjusting wheel limiting sleeve, the adjusting eccentric shaft will also rotate with the adjusting wheel limiting sleeve.

[0009] In order to ensure that the regulating wheel limiting sleeve can rotate freely, it can also be constrained to prevent it from falling off during the rotation process, etc., an outer ring fixing ring can be selected, and the outer ring fixing ring is sleeved on the outer periphery of the regulating wheel limiting sleeve, and an outer ring bearing is arranged between the outer ring fixing ring and the regulating wheel limiting sleeve. This scheme allows the regulating wheel limiting sleeve to rotate around its axis. At the same time, the displacement of the regulating wheel limiting sleeve in the direction of its axis is also constrained by the outer ring bearing, ensuring the stable operation of the structure. Based on the same design concept, the following scheme can also be selected: the outer periphery of the regulating eccentric shaft is sleeved with an adjusting eccentric shaft bearing, and the adjusting eccentric shaft bearing is arranged between the adjusting eccentric shaft and the regulating wheel limiting sleeve. Similarly, in order to make the rotation between the eccentric shaft and the eccentric ring smoother, the following scheme can also be selected: the outer periphery of the eccentric shaft is sleeved with an eccentric shaft bearing, and the eccentric shaft bearing is arranged between the eccentric shaft and the inner wall of the eccentric ring.

[0010] As a preferred form of the connection structure between the connecting rod and the bottom of the adjusting wheel, one end of the connecting rod can be selected to include a connecting rod collar, the bottom of the adjusting wheel is sleeved and arranged in the connecting rod collar, and the axis of the connecting rod collar is coaxially arranged with the geometric center axis of the bottom of the adjusting wheel. After such connection, the motion form can be transmitted more smoothly between the connecting rod and the bottom of the adjusting wheel. Among them, the axis of the connecting rod collar is coaxially arranged with the geometric center axis of the bottom of the adjusting wheel. When the adjusting wheel is rotated to adjust the position of the geometric center axis of the bottom of the adjusting wheel, the axis of the connecting rod collar is also adjusted.

[0011] When the above-mentioned adjustment mechanism is applied to a fascia gun, the following solution can be obtained: the fascia gun includes a fixed sleeve, and a sliding shaft is slidably arranged in the fixed sleeve. In actual use, the sliding shaft reciprocates under the constraint of the fixed sleeve, and the amplitude is determined. When the adjusting wheel is turned, the distance between the eccentric input hole and the geometric center axis at the bottom of the adjusting wheel changes, causing the actual eccentricity of the fascia gun to change, thereby adjusting the sliding amplitude of the sliding shaft. This solution makes the adjustment of the fascia gun more convenient. At the same time, the amplitude can be adjusted in real time during the massage process of the fascia gun, which greatly improves the user experience.

[0012] The beneficial effect of the utility model is that the solution adds an eccentric adjustment wheel on the basis of the existing eccentric wheel, and finally realizes the adjustment of the eccentric distance by rotating and adjusting the adjustment wheel. Its structural design is very clever, with little change to the existing basic structure, and at the same time, it can realize the adjustment of the amplitude during the operation of the structure. This solution is particularly suitable for fascia gun products that require real-time adjustment of the amplitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view along the longitudinal axis of the variable amplitude adjustment mechanism of the utility model applied to a fascia gun product.

[0014] Figure 2 It is a structural schematic diagram of a turbine and an adjusting gear in a variable amplitude adjusting mechanism of the utility model.

[0015] Figure 3 It is a schematic diagram of an eccentric ring at the bottom of an adjusting wheel in a variable amplitude adjusting mechanism of the utility model, and a blind hole in the eccentric ring for arranging an eccentric shaft.

[0016] Figure 4 It is a schematic diagram of an adjusting eccentric shaft at the top of an adjusting wheel and an end gear at the top of the adjusting eccentric shaft in a variable amplitude adjusting mechanism of the utility model.

[0017] Figure 5 It is a principle diagram of amplitude variation of the variable amplitude adjustment mechanism of the utility model.

[0018] Figure 6 It is a cross-sectional view of the adjusting wheel in the variable amplitude adjusting mechanism of the utility model on the central axis.

[0019] Marked in the figure are: motor 68, motor output shaft 72, motor fixing bracket 88, eccentric wheel 95, eccentric input hole 951, eccentric shaft bearing 112, adjusting wheel bearing 118, adjusting wheel 121, outer ring fixing ring 128, bearing seat 135, adjusting wheel limiting sleeve 142, turbine 147, eccentric shaft bearing 151, worm 158, outer ring bearing 159, connecting rod 164, positioning screw 169, connecting rod bearing 172, fixed sleeve 188, sliding shaft 193, eccentric shaft 99, adjusting gear 321, eccentric ring 231, end gear 221, adjusting eccentric shaft 1211, geometric center axis 1212, motor output shaft center 412, adjusting eccentric shaft center 523, geometric center axis adjustment trajectory 680. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] like Figures 1 to 6The figure shows an embodiment of applying a variable amplitude adjustment mechanism to a fascia gun product. The motor 68 is fixed on the motor fixing bracket 88, and the eccentric wheel 95 is fixedly connected to the motor output shaft 72. The eccentric wheel 95 is driven by the motor output shaft 72 to rotate. The eccentric shaft 99 on the eccentric wheel 95 is the output shaft, and the power outputted by the eccentric shaft 99 is directly used to drive the adjustment wheel 121 to move. An eccentric shaft bearing 112 is arranged on the periphery of the eccentric shaft 99, and the outer ring of the eccentric shaft bearing 112 is fixed in the inner hole of the adjustment wheel 121, that is, in the hole inside the eccentric ring for accommodating the eccentric shaft 99. An adjustment wheel bearing 118 is arranged on the periphery of the adjustment wheel 121, wherein the adjustment wheel bearing 118 is fixed in the connecting rod collar at one end of the connecting rod 164. The other end of the connecting rod 164 is fixed on the sliding shaft 193 through the connecting rod bearing 172 and the positioning screw 169, and the sliding shaft 193 is slidably connected with the fixed sliding sleeve 188. The outer periphery of the adjusting eccentric shaft 1211 at the upper end of the adjusting wheel 121 is fixed with the eccentric shaft bearing 151, and the outer ring of the eccentric shaft bearing 151 is fixed on the adjusting wheel limiting sleeve 142. The outer ring of the adjusting wheel limiting sleeve 142 is fixed with the outer ring bearing 159, and the outer ring of the outer ring bearing 159 is fixed on the outer ring fixing ring 128, and the outer ring fixing ring 128 is fixedly connected to the motor fixing bracket 88. A rotating shaft is arranged at the center of the adjusting wheel limiting sleeve 142, and the rotating shaft can be rotatably arranged in the turbine 147, and the rotating shaft is arranged coaxially with the turbine 147. An adjusting gear 321 is arranged at the lower end of the turbine 147, and the adjusting gear 321 is meshed with the end gear 221 at one end of the adjusting eccentric shaft 1211. The turbine 147 is connected with the worm 158, and the worm 158 is rotatably arranged on the bearing seat 135, and the bearing seat 135 is fixedly connected to the outer ring fixing ring 128.

[0022] At this point, the eccentric wheel 95 forms a transmission mechanism through the eccentric shaft 99, the adjusting wheel 121 and the adjusting wheel limiting sleeve 142. The actual eccentricity of the transmission mechanism is the distance between the motor output shaft 72 and the geometric center axis 1212 of the adjusting wheel 121, that is, the distance between the eccentric input hole 951 and the geometric center axis 1212 of the adjusting wheel 121. An ingenious design of this solution is that an eccentric ring 231 is constructed at the bottom of the adjusting wheel 121. Figure 3 and Figure 6 As shown, the bottom of the adjusting wheel 121 is circular, but the center of the eccentric ring 231 is not coaxial with the bottom center of the adjusting wheel 121. This eccentric design provides a structural basis for the subsequent rotation of the adjusting wheel 121, which causes the eccentric ring 231 to rotate, and then changes the distance between the eccentric input hole 951 and the geometric center axis 1212 of the adjusting wheel 121. More specifically, Figure 6 In the embodiment, the eccentric shaft center 523 is adjusted to be always coaxial with the eccentric shaft 99, and the rotation of the eccentric ring 231 directly causes the position of the geometric center axis 1212 to change, thereby achieving the above-mentioned adjustment of the actual eccentricity.

[0023] Figure 5 The adjustment process of the actual eccentricity is intuitively explained. The motor output shaft 72 is fixedly arranged in the eccentric input hole 951, and the center 412 of the motor output shaft is also the center of the eccentric input hole 951 of the eccentric wheel 95. The center of the eccentric shaft 99 of the eccentric wheel 95 is Figure 5 When the geometric center axis 1212 is adjusted, the motion trajectory formed by the adjustment is the geometric center axis adjustment trajectory 680. The line segment obtained by connecting the motor output shaft center 412 as the origin O and any point on the geometric center axis adjustment trajectory 680 is the actual eccentricity in this state. Figure 5 As shown, when the geometric center axis 1212 rotates to point A, the eccentricity is OA; when the geometric center axis 1212 rotates to point B, the eccentricity is OB; when the geometric center axis 1212 rotates to point C, the eccentricity is OC; when the geometric center axis 1212 rotates to point D, the eccentricity is OD. Different spacings correspond to different eccentricities, thereby obtaining different amplitudes.

[0024] Before using the fascia gun, the user rotates the worm 158, and the worm 158 drives the turbine 147 to rotate. The adjusting gear 321 on the turbine 147 and the meshing end gear 221 rotate together, so that the adjusting wheel 121 rotates relative to the adjusting wheel limit sleeve 142, and the adjusting wheel 121 also rotates relative to the eccentric shaft 99 on the eccentric wheel 95, thereby achieving the purpose of static adjustment of the amplitude.

[0025] When the fascia gun is in use, the motor output shaft 72 drives the eccentric wheel 95 to rotate, and the eccentric shaft 99 on the eccentric wheel 95 drives the adjusting wheel limit sleeve 142 to rotate through the adjusting wheel 121. Because the worm gear has a self-locking function, when the worm gear 158 does not move, the turbine 147 does not move either. At this time, the end gear 221 at the upper end of the adjusting wheel 121 meshing with the adjusting gear 321 at the lower end of the turbine 147 revolves around the central axis of the turbine 147, and the adjusting wheel 121 also rotates. At this time, due to the periodic change of the eccentricity of the central axis of the adjusting wheel 121 relative to the motor output shaft 72 during the aforementioned revolution and rotation of the adjusting wheel 121, the amplitude of the fascia gun changes periodically. Because the number of teeth and the module of the end gear 221 and the adjusting gear 321 are the same, the position of the corresponding striking point is consistent for each rotation of the end gear 221 around the turbine 147. When the user rotates the adjusting worm 158 to rotate the turbine 147, the relative position of the adjusting wheel 121 when rotating around the turbine 147 is changed. The change in relative position corresponds to different amplitudes, thereby achieving the ability to adjust the amplitude during use.

Claims

1. A variable amplitude adjustment mechanism, comprising a sliding shaft (193), a connecting rod (164) and a rotatable eccentric wheel (95), wherein one end of the connecting rod (164) is hinged to the sliding shaft (193), the sliding shaft (193) is slidably arranged, and the eccentric wheel (95) comprises an eccentric input hole (951) and an eccentric shaft (99), characterized in that: The adjusting wheel (121) comprises an eccentric ring (231) at the bottom of the adjusting wheel (121), an adjusting eccentric shaft (1211) at the top of the adjusting wheel (121), the eccentric ring (231) being rotatably sleeved on the eccentric shaft (99), the adjusting eccentric shaft (1211) being coaxially arranged with the eccentric shaft (99), and one end of the connecting rod (164) being hinged to the eccentric ring (231); The adjusting wheel (121) is rotated to adjust the distance between the eccentric input hole (951) and the geometric center axis (1212) at the bottom of the adjusting wheel (121) so as to drive the sliding amplitude of the sliding shaft (193) to be adjusted.

2. The variable amplitude adjustment mechanism according to claim 1, characterized in that: The invention comprises an adjusting gear (321), wherein the end of the adjusting eccentric shaft (1211) is provided with an end gear (221) meshing with the adjusting gear (321), the end gear (221) and the adjusting gear (321) have the same number of teeth and module, and the adjusting gear (321) is used to drive the adjusting wheel (121) to rotate through the end gear (221).

3. The variable amplitude adjustment mechanism according to claim 2, characterized in that: It comprises a turbine (147), the adjusting gear (321) is arranged on the turbine (147), and the turbine (147) and the adjusting gear (321) are coaxially arranged.

4. The variable amplitude adjustment mechanism according to claim 3, characterized in that: It includes a worm (158) matched with the turbine (147), and the worm (158) is used to drive the turbine (147) to rotate and then drive the adjusting wheel (121) to rotate.

5. The variable amplitude adjustment mechanism according to any one of claims 3 to 4, characterized in that: The invention comprises an adjusting wheel limiting sleeve (142), wherein the adjusting wheel limiting sleeve (142) is rotatably arranged on a turbine (147) via a rotating shaft, wherein the rotating shaft is coaxially arranged with the turbine (147) and an eccentric input hole (951), and an adjusting eccentric shaft (1211) is rotatably arranged in the adjusting wheel limiting sleeve (142).

6. The variable amplitude adjustment mechanism according to claim 5, characterized in that: It comprises an outer ring fixing ring (128), wherein the outer ring fixing ring (128) is sleeved on the outer periphery of an adjusting wheel limiting sleeve (142), and an outer ring bearing (159) is arranged between the outer ring fixing ring (128) and the adjusting wheel limiting sleeve (142).

7. The variable amplitude adjustment mechanism according to claim 6, characterized in that: An adjusting eccentric shaft bearing (151) is sleeved on the outer periphery of the adjusting eccentric shaft (1211), and the adjusting eccentric shaft bearing (151) is arranged between the adjusting eccentric shaft (1211) and the adjusting wheel limiting sleeve (142).

8. The variable amplitude adjustment mechanism according to any one of claims 1 to 4, characterized in that: An eccentric shaft bearing (112) is sleeved on the outer periphery of the eccentric shaft (99), and the eccentric shaft bearing (112) is arranged between the eccentric shaft (99) and the inner wall of the eccentric ring (231).

9. The variable amplitude adjustment mechanism according to any one of claims 1 to 4, characterized in that: One end of the connecting rod (164) includes a connecting rod collar, the bottom of the adjusting wheel (121) is sleeved in the connecting rod collar, and the axis of the connecting rod collar is coaxially arranged with the geometric center axis (1212) of the bottom of the adjusting wheel (121).

10. A fascia gun, comprising a fixed sleeve (188), characterized in that: It also comprises a variable amplitude adjustment mechanism as claimed in any one of claims 1 to 9, wherein the sliding shaft (193) is slidably disposed in the fixed sliding sleeve (188).

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