Variable amplitude adjusting mechanism capable of detecting amplitude and fascia gun

Abstract

The utility model relates to the field of fascia guns, in particular to a variable amplitude adjusting mechanism capable of detecting amplitude and a fascia gun, which are used for directly detecting amplitude parameters before and after adjustment through a magnetic sensor and a magnetic piece so as to accurately obtain the amplitude adjustment, and comprises a reciprocating motion mechanism, the reciprocating motion mechanism comprises a piston rod, a transmission arm and a rotatable eccentric wheel, one end of the transmission arm is hinged to the piston rod, the piston rod is arranged on the fixed shell in a sliding mode, the eccentric wheel comprises an output shaft, the output shaft is hinged to the transmission arm, and the output shaft comprises a magnetic sensor and a magnetic piece achieving magnetic induction with the magnetic sensor. The magnetic sensor is arranged on the fixed shell or the support, and the magnetic piece is arranged on the reciprocating motion mechanism. The utility model is especially suitable for fascia gun products.

Description

Technical Field

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

[0002] A fascia gun, also known as a deep myofascial release device, is a soft tissue massage tool that relaxes the body's soft tissues through high-frequency impacts. Current fascia guns use a piston to drive the massage head in a linear reciprocating motion. The massage head contacts the body, generating high-frequency vibrations that penetrate deep into the muscles, reducing local tissue tension, relieving pain, and promoting blood circulation. Users can choose the appropriate fascia gun's vibration depth for their individual needs. For example, professional athletes require a deeper vibration depth to relieve muscle tension after exercise. Ordinary consumers, especially beginners, should initially use a fascia gun with a shallower vibration depth and gradually increase the depth as needed.

[0003] Existing fascia guns, when collecting data on amplitude adjustment, indirectly calculate the adjusted amplitude parameters by collecting motor speed data and converting it based on the relationship between the distance the motor output shaft travels and the reciprocating movement of the piston rod. However, in methods that adjust amplitude by changing the eccentricity, interference factors such as clearances between mating parts cause cumulative errors from the power input to the power output, resulting in discrepancies between the calculated and actual adjusted amplitude values. Consequently, the actual adjusted amplitude differs from the calculated amplitude, leading to a difference in perceived amplitude for the user. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a variable amplitude adjustment mechanism and fascia gun that can detect amplitude by directly detecting amplitude parameters before and after adjustment through magnetic sensors and magnetic components, thereby accurately obtaining the amplitude adjustment magnitude.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a variable amplitude adjustment mechanism capable of detecting amplitude, including a reciprocating motion mechanism. The reciprocating motion mechanism includes a piston rod, a transmission arm, and a rotatable eccentric wheel. One end of the transmission arm is hinged to the piston rod, which is slidably mounted on a fixed housing. The eccentric wheel includes an output shaft, which is hinged to the transmission arm. It also includes a magnetic sensor and a magnetic component that achieves magnetic induction with the magnetic sensor. The magnetic sensor is mounted on the fixed housing or a bracket, and the magnetic component is mounted on the reciprocating motion mechanism. In actual use, the piston rod reciprocates, the eccentric wheel performs circular motion, and the transmission arm is located between the piston rod and the eccentric wheel, swinging back and forth. When the corresponding amplitude is adjusted, the reciprocating motion mechanism will exhibit a change in its motion trajectory, which is also reflected in the magnetic component on the reciprocating motion mechanism. By detecting the change in the motion trajectory of the magnetic component through magnetic induction between the magnetic sensor and the magnetic component, the amplitude adjustment parameters are directly obtained.

[0006] As one embodiment of the fixing structure between the magnetic component and the reciprocating motion mechanism, the magnetic component can be fixedly mounted on the output shaft of the eccentric wheel. The output shaft revolves around the motor output shaft. When the amplitude is adjusted, the distance between the output shaft and the motor output shaft, i.e., the eccentricity, changes. Therefore, the motion trajectory of the output shaft changes, which in turn causes a change in the motion trajectory of the magnetic component. Once the magnetic sensor detects this change, it can determine the amplitude adjustment.

[0007] Preferably, a magnetic component fastening screw is fixedly connected to the bottom of the magnetic component, and the magnetic component fastening screw is fixedly disposed on the top of the output shaft, with the axis of the magnetic component fastening screw arranged coaxially with the axis of the output shaft. The magnetic component fastening screw allows for convenient fixing of the magnetic component to the top of the output shaft, and also facilitates subsequent disassembly and replacement.

[0008] As another embodiment of the fixing structure between the magnetic component and the reciprocating motion mechanism, the magnetic component can be fixedly mounted on the piston rod. During amplitude adjustment, the amplitude of the reciprocating piston rod also changes; the magnetic sensor detects this change to obtain the amplitude adjustment status. Preferably, a piston rod groove can be provided on the side wall of the piston rod, and the magnetic component can be fixedly mounted within the piston rod groove. This ensures the magnetic component is securely installed. Generally, the piston rod groove can be chosen to extend along the axial direction of the piston rod.

[0009] A guide ring can be added between the fixed housing and the piston rod. The piston rod slides within the guide ring and reciprocates along the axis of the guide ring, thereby reducing the movement resistance of the piston rod. Furthermore, it is preferable to mount a magnetic sensor on the guide ring to enable magnetic induction detection of magnetic components.

[0010] As one embodiment for amplitude adjustment, the following scheme can be selected: An eccentric wheel includes an eccentric column and an adjusting slider, with the adjusting slider slidably connected to the eccentric column, and an output shaft mounted on the eccentric column; a motor assembly is included, with its output shaft connected to the input end of the eccentric wheel, the axes of the motor output shafts being parallel to each other, and the sliding direction of the eccentric column perpendicular to the axis of the motor output shaft; at least a portion of the motor assembly is slidably mounted along the axis of the motor output shaft; a motor assembly drive mechanism connected to the motor assembly is included, which drives at least a portion of the motor assembly to move along the axis of the motor output shaft, thereby driving the eccentric column to slide, thus adjusting the distance between the motor output shaft and the eccentric column. In actual adjustment, the motor assembly is driven to move along the motor output shaft by the motor assembly drive mechanism, and the moving motor output shaft drives the eccentric column to slide laterally in a direction perpendicular to the motor output shaft. Since the distance between the motor output shaft and the eccentric column is the eccentricity, the laterally sliding eccentric column causes a change in the eccentricity, thereby achieving a change in the sliding amplitude of the piston rod.

[0011] When applying the above structure to a fascia gun product, the following solution can be selected: it also includes the variable amplitude adjustment mechanism that can detect amplitude. By using a magnetic sensor to magnetically inductively sense the magnetic components, the amplitude adjustment status can be obtained in real time, thus accurately determining the amplitude adjustment situation. This greatly improves the accuracy and convenience of adjustment for users when using the fascia gun for massage, effectively enhancing the user experience.

[0012] The beneficial effects of this invention are: by adding a magnetic sensor and a magnetic component that achieves magnetic induction with the magnetic sensor, changes in the movement trajectory of the magnetic component can be detected by the magnetic sensor in a timely manner, thereby obtaining the amplitude adjustment status in real time and obtaining accurate amplitude adjustment values. This invention is particularly suitable for fascia gun products. Attached Figure Description

[0013] Figure 1 This is an exploded view of a fascia gun when applied to a fascia gun product according to one embodiment of this utility model.

[0014] Figure 2 yes Figure 1 A schematic diagram of the eccentric seat, the first eccentric column, and the first adjusting slider in the embodiment.

[0015] Figure 3 yes Figure 1 In one embodiment, the magnetic component is mounted on the output shaft by a magnetic component fastening screw, and is in the minimum amplitude state at this time.

[0016] Figure 4 yes Figure 1In one embodiment, the magnetic component is mounted on the output shaft by a magnetic component fastening screw, and is in the maximum amplitude state at this time.

[0017] Figure 5 This is a schematic diagram of another embodiment of the present invention applied to a fascia gun product, in which the magnetic component is disposed on the piston rod, and at this time it is in the maximum amplitude state.

[0018] Figure 6 yes Figure 5 A sectional view of the side.

[0019] Figure 7 yes Figure 5 The schematic diagram shows the magnetic component mounted on the piston rod when the embodiment is applied to the fascia gun product, and the magnetic component is in the minimum amplitude state at this time.

[0020] Figure 8 yes Figure 7 A sectional view of the side.

[0021] The components in the diagram are labeled as follows: 1. Fixed bracket; 2. Shock-absorbing guide sleeve; 3. Eccentric bearing; 4. Eccentric seat; 41. First eccentric groove; 42. Second eccentric groove; 5. First eccentric column; 51. First eccentric column inclined surface; 52. First eccentric column guide platform; 53. Output shaft; 6. First adjusting slider; 61. First adjusting slider inclined surface; 62. First adjusting slider guide platform; 7. Motor assembly; 71. Motor output shaft; 72. Guide column; 73. Motor bracket; 731. First mounting cylinder; 732. Second mounting cylinder; 733. Outer rotor; 734. Magnet; 735. Coil assembly; 8. Adjusting bearing. 9. Threaded adjustment seat; 10. Adjustment knob; 11. Transmission arm; 12. Piston rod; 13. Guide ring; 14. Fixed housing; 15. Motor bracket bearing; 16. Rear housing; 17. Second adjustment slider; 18. Second eccentric column; 181. Second eccentric column groove; 182. Second adjustment slider slot; 19. Threaded bearing; 20. Threaded slider; 20A. Left limit edge; 20B. Right limit edge; 21. Threaded sleeve; 22. Threaded sleeve screw; 23. Knob cover; 24. Decorative top cover; 25. Knob cover screw; 141. Magnetic sensor; 142. Magnetic component; 143. Magnetic component fastening screw. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 4The illustration shows an embodiment where the magnetic component 142 is fixedly mounted on the output shaft 53 of the eccentric wheel. The bottom of the magnetic sensor 141 is fixedly mounted on the inner wall of the fixed housing 14. A magnetic component fastening screw 143 is fixedly connected to the bottom of the magnetic component 142, and is fixedly mounted on the top of the output shaft 53 through a threaded engagement between the magnetic component fastening screw 143 and the top of the output shaft 53. The axis of the magnetic component fastening screw 143 is coaxial with the axis of the output shaft 53. When the magnetic component 142 needs to be replaced later, the magnetic component fastening screw 143 can be easily unscrewed. The magnetic component 142 detects the circular motion of the output shaft 53. When the eccentricity is adjusted, the circular motion trajectory of the output shaft 53 changes. The magnetic sensor 141 directly detects the change in the circular motion trajectory through the magnetic component 142 and converts it into parameters of the corresponding amplitude.

[0024] At the same time, such as Figures 1 to 4 The illustration shows one embodiment for achieving variable amplitude adjustment. One end of the transmission arm 11 is hinged to the piston rod 12, which is slidably mounted on the guide ring 13, which is mounted on the fixed housing 14 of the fascia gun. The other end of the transmission arm 11 is rotatably connected to the output shaft 53, which is vertically positioned at the top of the first eccentric column 5. The distance between the output shaft 53 and the motor output shaft 71 of the motor assembly 7 is the eccentricity. By adjusting the eccentricity, the vibration amplitude of the piston rod 12 can be adjusted.

[0025] like Figure 2 , Figure 3 and Figure 4 As shown, the cooperation between the eccentric seat 4, the first eccentric column 5, and the first adjusting slider 6 is key to achieving eccentricity adjustment. An eccentric seat bearing 3 is fitted around the eccentric seat 4. Besides the output shaft 53 at the top, the first eccentric column 5 has first eccentric column guide platforms 52 on both sides, and a first eccentric column inclined surface 51 inside. The first eccentric column inclined surface 51 and the first adjusting slider inclined surface 61 at the top of the first adjusting slider 6 are in close contact and form a sliding fit, wherein the first adjusting slider inclined surface 61 is obliquely intersecting the motor output shaft 71. Inside the eccentric seat 4, a first eccentric groove 41 is provided horizontally, and a second eccentric groove 42 is provided vertically. The first eccentric column guide platform 52 is in sliding fit with the first eccentric groove 41, and the first adjusting slider guide platforms 62 on both sides of the first adjusting slider 6 are in sliding fit with the second eccentric groove 42.

[0026] like Figure 3As shown, when the motor output shaft 71 moves upward, the top of the motor output shaft 71 drives the first adjusting slider inclined surface 61 to move upward along the second eccentric slide groove 42. The upward-moving first adjusting slider inclined surface 61 drives the first eccentric column 5 to move laterally to the right along the first eccentric slide groove 41 through the first eccentric column inclined surface 51. When the eccentric column 5 moves laterally to the right, the distance between the output shaft 53 of the eccentric column 5 and the motor output shaft 71 decreases, that is, the eccentricity decreases, thereby realizing the adjustment of the amplitude. When the first adjusting slider 6 moves upward to the limit position, the minimum value of the eccentricity is reached, at which time the amplitude of the fascia gun is the minimum.

[0027] Conversely, such as Figure 4 As shown, when the motor output shaft 71 moves downward, the top of the motor output shaft 71 drives the first adjusting slider inclined surface 61 to move downward along the second eccentric slide groove 42. The downward movement of the first adjusting slider inclined surface 61 causes the high-speed rotating first eccentric column 5 to move laterally outward under the action of centrifugal force. Figure 4 The eccentric column 5 moves laterally to the left. When the eccentric column 5 moves laterally to the left, the distance between the output shaft 53 of the eccentric column 5 and the output shaft 71 of the motor increases, that is, the eccentricity increases, thereby realizing the adjustment of the amplitude. When the first adjusting slider 6 moves downward to the limit position, the maximum value of the eccentricity is reached, at which time the amplitude of the fascia gun is the largest.

[0028] As one embodiment of the structure for realizing the vertical movement of the motor assembly 7, such as Figure 1 , Figure 3 and Figure 4 As shown, the motor output shaft 71 of the motor assembly 7 is arranged vertically, and a guide post 72 is arranged vertically on the top of the motor assembly 7. A compression spring is sleeved on the guide post 72, and the direction of the guide post 72 is parallel to the direction of the motor output shaft 71. The guide post 72 extends upward, passes through the shock-absorbing guide sleeve 2, and is slidably disposed in the guide hole of the fixed bracket 1, which can be fixedly connected to the fixed housing 14. The guide post 72 guides the motor assembly 7 to move upward or downward along the direction of the motor output shaft 71, thereby driving the first adjusting slider 6 to move upward or downward. The compression spring can buffer the impact of vibration during operation on the motor assembly 7.

[0029] As one embodiment of the motor assembly drive mechanism for realizing the up-and-down movement of the drive motor assembly 7, such as Figure 1 , Figure 3 and Figure 4As shown, the bottom of the motor output shaft 71 passes through the bottom plane of the motor assembly 7, and the bottom of the motor output shaft 71 is connected to the threaded adjusting seat 9 via an adjusting seat bearing 8. An adjusting knob 10 is fitted onto the threaded adjusting seat 9, and the adjusting knob 10 and the threaded adjusting seat 9 are threadedly connected. The inner wall of the fixed housing 14 has a groove, and the outer periphery of the adjusting knob 10 has an annular boss. The annular boss is positioned around the axis of the adjusting knob 10 on the outer peripheral wall of the adjusting knob 10, allowing the adjusting knob 10 to rotatably reside within the groove of the fixed housing 14 via the annular boss. The fit between the annular boss and the groove of the fixed housing 14 ensures that the adjusting knob 10 can only rotate around its rotation axis and cannot slide along the direction of the rotation axis. The rotating adjusting knob 10 causes the threaded adjusting seat 9, which is threadedly engaged with the adjusting knob 10, to move upwards or downwards. The moving threaded adjusting seat 9 then drives the motor assembly 7 to move upwards or downwards, thereby achieving the corresponding eccentricity adjustment.

[0030] like Figures 5 to 8 The illustration shows an embodiment where the magnetic component 142 is fixedly mounted on the piston rod 12. The top of the magnetic sensor 141 is fixedly mounted on the inner wall of the mounting housing 14. A piston rod groove is provided on the side wall of the piston rod 12, and the magnetic component 142 is fixedly mounted in the piston rod groove. Of course, the orientation of the piston rod groove can be as follows: Figure 5 As shown, it extends along the axial direction of the piston rod 12. Alternatively, it can be arranged around the axis of the piston rod 12 on the outer peripheral wall surface of the piston rod 12 to form an annular piston rod groove, while the magnetic component 142 is made into a circular ring and snapped into the annular piston rod groove.

[0031] Alternatively, the magnetic sensor 141 can be placed on the guide ring 13, and the magnetic component 142 can be magnetically detected.

[0032] like Figures 5 to 8 The illustration shows another embodiment for achieving variable amplitude adjustment. In this embodiment, similarly, one end of the transmission arm 11 is hinged to the piston rod 12, the piston rod 12 is slidably disposed on the guide ring 13, and the guide ring 13 is disposed on the fixed housing 14 of the fascia gun. The other end of the transmission arm 11 is rotatably connected to the output shaft 53 disposed vertically on the second eccentric column 18. Preferably, the fixed housing 14 and the rear housing 16 can be selected to form a complete housing structure by fastening them together.

[0033] exist Figure 5 and Figure 7In the structure shown, the motor bracket 73 of the motor assembly 7 has a first mounting cylinder 731 and a second mounting cylinder 732 with mutually perpendicular axes. The motor output shaft 71 is rotatably mounted inside the first mounting cylinder 731, and the motor output shaft 71 can slide relative to the first mounting cylinder 731. The piston rod 12 is slidably disposed inside the second mounting cylinder 732. In actual manufacturing, both the first mounting cylinder 731 and the second mounting cylinder 732 are integrated onto the motor bracket 73, improving the integration of components and further compressing the internal space occupied by related components. An outer rotor 733 and a magnet 734 integrated within the outer rotor 733 are fixed on the motor output shaft 71. Corresponding to the magnet 734, a coil assembly 735 is sleeved on the first mounting cylinder 731. The upper end of the motor output shaft 71 is connected to the motor assembly drive mechanism, and the lower end of the motor output shaft 71 has a wedge-shaped surface that slides with an eccentric column. In actual driving, only a portion of the motor assembly 7 participates in the movement along the direction of the motor output shaft 71, while a portion remains relatively fixed. Since the outer rotor 733 and the magnet 734 integrated within the outer rotor 733 are fixedly connected to the motor output shaft 71, when the motor output shaft 71 moves up and down, the outer rotor 733 and the magnet 734 move up and down with the motor output shaft 71, while the positions of the coil assembly 735 and the first mounting cylinder 731 remain relatively fixed. The up-and-down moving motor output shaft 71 drives the eccentric column to slide through the wedge-shaped surface at the lower end of the motor output shaft 71.

[0034] As one embodiment for achieving the sliding of the eccentric column driven by the wedge-shaped surface of the motor output shaft 71, the bottom end of the motor output shaft 71 can be directly slidably engaged with the second eccentric column groove 181 of the second eccentric column 18. For example... Figures 5 to 8As shown, since the second eccentric column inclined groove 181 is obliquely arranged to the axis of the motor output shaft 71, the vertical movement of the motor output shaft 71 can be converted into the horizontal movement of the second eccentric column 18 through the second eccentric column inclined groove 181. Specifically, the second adjusting slider 17 includes a second adjusting slider slot 182, the direction of which is perpendicular to the motor output shaft 71. The bottom end of the motor output shaft 71 passes through the second adjusting slider 17 and slides in engagement with the second eccentric column inclined groove 181. The side wall of the second eccentric column 18 is provided with a T-shaped boss that slides in engagement with the second adjusting slider slot 182 of the second adjusting slider 17. That is, the second eccentric column 18 is engaged in the second adjusting slider slot 182 through the T-shaped boss on the side wall, thereby ensuring that the second eccentric column 18 slides along the direction of the second adjusting slider slot 182. Therefore, when the bottom end of the motor output shaft 71 drives the second eccentric column 18 to move, the up-and-down movement of the motor output shaft 71 can be converted into the left-and-right sliding of the second eccentric column 18 along the direction of the second adjusting slider slot 182. Given that the fascia gun generates high-frequency vibrations during operation, and considering the structural characteristics of this embodiment, a T-shaped structure can be used to enhance the stability of the fit between the structures at the corresponding sliding parts. Specifically, the cross-sectional shape of the second eccentric column groove 181 is T-shaped, and the motor output shaft 71 is engaged within the second eccentric column groove 181 via the T-shaped inclined surface at its bottom end; the cross-sectional shape of the second adjusting slider slot 182 is T-shaped, and the second eccentric column 18 is engaged within the second adjusting slider slot 182 via the T-shaped boss on its side wall.

[0035] In specific adjustments to the above embodiments, such as... Figure 5 and Figure 6 As shown, when the motor output shaft 71 moves downward, the motor output shaft 71 drives the second eccentric column 18 to move to the right through the sliding engagement between the T-shaped inclined surface at its bottom and the inclined groove 181 of the second eccentric column. During the movement, the second eccentric column 18, guided by the T-shaped boss on its side wall, moves parallel to the right along the second adjusting slider groove 182. At this point, the distance between the output shaft 53 of the second eccentric column 18 and the motor output shaft 71 increases, thus increasing the eccentricity and obtaining a larger amplitude. Conversely, as... Figure 7 and Figure 8 As shown, when the motor output shaft 71 moves upward, the second eccentric column 18 moves to the left parallel along the second adjusting slider groove 182, the eccentricity decreases, and the amplitude decreases.

[0036] Another embodiment of the motor assembly drive mechanism for realizing the up-and-down movement of the drive motor assembly 7 is as follows: Figures 5 to 8As shown, the top end of the motor output shaft 71 of the motor assembly 7 is rotatably engaged with the threaded slider 20 via a threaded bearing 19, and the threaded bearing 19 is fixed by a threaded sleeve screw 22 located at the top end of the motor output shaft 71. The threaded slider 20 and the threaded sleeve 21 are threadedly engaged. The threaded sleeve 21 is mounted on the knob cover 23 via a knob cover screw 25. A decorative top cover 24 is then provided on the knob cover 23 to cover the knob cover screw 25. The axis of the knob cover 23 is coaxial with the axis of the motor output shaft 71. Simultaneously, the threaded slider 20 has a left limiting edge 20A and a right limiting edge 20B on both sides. The left limiting edge 20A and the right limiting edge 20B extend along the direction of the motor output shaft 71. The left limiting edge 20A is slidably mounted in a slot in the fixed housing 14, and the right limiting edge 20B is slidably mounted in a slot in the rear housing 16. In actual use, rotating the knob cover 23 drives the threaded sleeve 21 to rotate synchronously, which in turn drives the threaded slider 20, which is threadedly engaged with the threaded sleeve 21, to move up or down. This, in turn, drives the motor output shaft 71 to move up or down, thereby adjusting the eccentricity and amplitude. The left limit edge 20A and the right limit edge 20B are respectively slidably set in their corresponding slots. Therefore, when the knob cover 23 is rotated, the threaded slider 20 will only move up or down and will not rotate around its own axis, ensuring the accuracy of amplitude adjustment.

Claims

1. A variable amplitude adjustment mechanism capable of detecting amplitude, comprising a reciprocating motion mechanism, the reciprocating motion mechanism comprising a piston rod (12), a transmission arm (11), and a rotatable eccentric wheel, one end of the transmission arm (11) being hinged to the piston rod (12), the piston rod (12) being slidably disposed on a fixed housing (14), the eccentric wheel comprising an output shaft (53), the output shaft (53) being hinged to the transmission arm (11), characterized in that: It includes a magnetic sensor (141) and a magnetic component (142) that achieves magnetic induction with the magnetic sensor (141). The magnetic sensor (141) is disposed on a fixed housing (14) or a bracket (1), and the magnetic component (142) is disposed on a reciprocating motion mechanism.

2. The variable amplitude adjustment mechanism capable of detecting amplitude as described in claim 1, characterized in that: The magnetic component (142) is fixedly mounted on the output shaft (53) of the eccentric wheel.

3. The variable amplitude adjustment mechanism capable of detecting amplitude as described in claim 2, characterized in that: A magnetic fastening screw (143) is fixedly connected to the bottom of the magnetic component (142). The magnetic fastening screw (143) is fixedly set on the top of the output shaft (53). The axis of the magnetic fastening screw (143) is arranged coaxially with the axis of the output shaft (53).

4. The variable amplitude adjustment mechanism capable of detecting amplitude as described in claim 1, characterized in that: The magnetic component (142) is fixedly mounted on the piston rod (12).

5. The variable amplitude adjustment mechanism capable of detecting amplitude as described in claim 4, characterized in that: The piston rod (12) has a piston rod groove on its side wall, and a magnetic component (142) is fixedly installed in the piston rod groove.

6. The variable amplitude adjustment mechanism capable of detecting amplitude as described in claim 5, characterized in that: The piston rod groove extends along the axial direction of the piston rod (12).

7. The variable amplitude adjustment mechanism capable of detecting amplitude as described in claim 1, characterized in that: A guide ring (13) is installed inside the fixed housing (14), and the piston rod (12) is slidably disposed inside the guide ring (13). The piston rod (12) reciprocates along the axial direction of the guide ring (13).

8. The variable amplitude adjustment mechanism for detecting amplitude as described in claim 7, characterized in that: The magnetic sensor (141) is mounted on the guide ring (13).

9. The variable amplitude adjustment mechanism capable of detecting amplitude as described in any one of claims 1 to 8, characterized in that: The eccentric wheel includes an eccentric column and an adjusting slider. The adjusting slider is slidably connected to the eccentric column, and the output shaft (53) is set on the eccentric column. The motor assembly (7) includes a motor output shaft (71) connected to the input end of an eccentric wheel. The axis of the motor output shaft (71) is parallel to the axis of the output shaft (53), and the sliding direction of the eccentric column is perpendicular to the axis of the motor output shaft (71). At least a portion of the motor assembly (7) is slidably disposed along the axial direction of the motor output shaft (71); including a motor assembly drive mechanism connected to the motor assembly (7), the motor assembly drive mechanism drives at least a portion of the motor assembly (7) to move along the axial direction of the motor output shaft (71) and drives the eccentric column to slide, so as to adjust the distance between the motor output shaft (71) and the eccentric column.

10. A fascia gun, characterized in that: It also includes a variable amplitude adjustment mechanism with detectable amplitude as described in any one of claims 1 to 9.

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