A myofascial relaxation massage device with adaptive mechanical feedback force adjustment

Abstract

This invention discloses a fascia relaxation massage device with adaptive mechanical feedback force adjustment, relating to the field of fascia gun technology. The invention achieves adjustable massage head stroke through a crank disc and sliding pin structure. An adjusting electric cylinder drives the sliding pin to slide radially, changing the eccentricity, thereby achieving real-time amplitude adjustment. A wedge-shaped sliding inclined surface structure is used between the driven and driving dials, generating relative sliding when massage resistance is too high. A periodic conductive signal serves as the overload detection basis, used to adjust or stop the motor operation. An adjustable force threshold mechanism is constructed using a threaded compression disc, an electromagnet, and a spring to achieve force threshold setting.

Description

Technical Field

[0001] This invention relates to the field of fascia gun technology, specifically to a fascia relaxation massage device with adaptive mechanical feedback force adjustment. Background Technology

[0002] Most existing fascia relaxation massage devices employ a fixed-stroke, fixed-intensity mechanical reciprocating structure, driving the massage head in reciprocating motion via a constant eccentric wheel or crank mechanism. This type of structure can only provide a single, fixed-amplitude impact massage, lacking the ability to respond in real-time to the user's actual pressure. When the user applies different resistance to the massage head due to pain, muscle tension, or changes in the massage area, traditional structures cannot adjust in time, often resulting in excessive pressure, excessive impact force, or overheating of the drive motor, posing a risk of muscle damage and easily leading to motor fatigue or even burnout. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides the following technical solution: a myofascial relaxation massage device with adaptive mechanical feedback force adjustment, comprising a support shell, a top support plate fixedly mounted on the support shell, a crank plate rotatably mounted at the center of the upper surface of the top support plate, and a driven dial rotatably mounted at the center of the lower surface of the top support plate, the driven dial being fixed to the crank plate by a rotating shaft; an adjustment groove is formed radially on the crank plate, and a sliding pin is slidably mounted in the adjustment groove by a limiting ring, the limiting ring being used to prevent the sliding pin from separating from the adjustment groove; it also includes a mounting sleeve and an adjustment cylinder, wherein the mounting sleeve and the sliding pin are movably connected by a rocker arm, the telescopic rod of the adjustment cylinder drives the sliding pin to slide radially along the crank plate in the adjustment groove through a ball joint connecting rod, changing the axial distance between the sliding pin and the crank plate; an active dial is coaxially arranged below the driven dial, and a first detection unit and a second detection unit are respectively arranged at the circumferential positions between the opposite surfaces of the driven dial and the active dial.

[0004] Preferably, the first detection unit includes a driven wedge fixedly engaged with the driven dial, the driven wedge having a first conductive surface parallel to the surface of the driven dial and a first contact sliding slope inclined to the surface of the driven dial; the second detection unit includes an active wedge fixedly engaged with the active dial, the active wedge having a second conductive surface parallel to the surface of the active dial and a second contact sliding slope inclined to the surface of the active dial; wherein the second conductive surface and the first conductive surface are in contact conductive engagement; the second contact sliding slope and the first contact sliding slope are in contact sliding engagement.

[0005] Preferably, a limiting threaded sleeve is fixedly installed on the inner side of the support housing, and a threaded extrusion disc is coaxially threaded inside the limiting threaded sleeve. A spring seat is rotatably installed at the center of the threaded extrusion disc via an axially loaded bearing. Multiple spring steel plates are evenly fixedly installed on the circumferential edge of the spring seat, and a contact magnetic friction plate is fixed at the end of each spring seat away from the spring seat. The side of the threaded extrusion disc facing the drive dial is provided with a contact friction cone surface, which is in contact friction with the contact magnetic friction plate. An electromagnet is fixedly installed on the inner side of the threaded extrusion disc, and the electromagnet is in magnetic contact with the contact magnetic friction plate.

[0006] Preferably, a splined spindle is inserted into the axial position of the spring seat via a spline sliding mechanism. The drive dial is sleeved on the splined spindle via a spline sliding mechanism. A spring is sleeved on the outer side of the splined spindle between the drive dial and the spring seat. The two ends of the spring are fixedly engaged with the drive dial and the spring seat, respectively.

[0007] Preferably, it also includes two handle housings, which are fastened together to form a sealed housing. The movable mounting sleeve is wrapped by the two handle housings, allowing the movable mounting sleeve to slide on the two handle housings. The support housing is fixed in the two handle housings, and the two handle housings are also equipped with a lithium battery and a control board.

[0008] Preferably, a drive motor is fixedly installed inside the support housing by a shock-absorbing fixing sleeve, and the output shaft of the drive motor is fixedly engaged with the spline spindle.

[0009] Preferably, the adjusting electric cylinder is fixedly mounted on the adjusting electric cylinder bracket, the adjusting electric cylinder bracket is fixedly mounted in the two handle housings, and two stabilizing slide rods are slidably mounted on the adjusting electric cylinder bracket along the axial direction of the adjusting electric cylinder. A stabilizing frame is fixedly mounted between the two stabilizing slide rods, and an end connecting block is fixedly mounted on the stabilizing frame. The end connecting block is fixedly mounted on the end of the telescopic rod of the adjusting electric cylinder, and the end connecting block is movably connected to the sliding pin through a ball joint. Both ends of the ball joint are in ball joint motion with the sliding pin and the end connecting block.

[0010] Compared with the prior art, the present invention has the following advantages: (1) The present invention uses the wedge sliding inclined surface between the driven dial and the active dial to make the two slide relative to each other when the massage head is obstructed too much, thereby triggering the periodic contact and separation of the first conductive surface and the second conductive surface, thus forming a mechanical-electric signal linkage feedback. This enables the instant adjustment of the motor speed to decrease or the machine to stop directly. Therefore, it can effectively prevent muscle damage and motor stalling and overheating caused by excessive pressure from the user, and significantly improve safety and reliability; (2) The present invention uses the adjusting groove combined with the electric cylinder to realize the adjustment of the position of the sliding pin in the radial direction of the crank plate, thereby changing the eccentricity of the crank mechanism, and finally changing the reciprocating stroke of the movable sleeve. This structure makes the stroke amplitude no longer a fixed value, but can be automatically adjusted at any time according to the massage area, user feeling or load, so that the massage device can adapt to the needs of different muscle depths. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the external structure of the handle housing of the present invention.

[0012] Figure 2 This is a schematic diagram of the internal structure of the handle housing of the present invention.

[0013] Figure 3 This is a schematic diagram of the support shell structure of the present invention.

[0014] Figure 4 For the present invention Figure 3 Schematic diagram at point A in the middle.

[0015] Figure 5 This is a schematic diagram of the threaded sleeve structure of the present invention.

[0016] Figure 6 This is a schematic diagram of the crankshaft disk structure of the present invention.

[0017] Figure 7 This is a schematic diagram of the threaded extrusion disc structure of the present invention.

[0018] Figure 8 For the present invention Figure 7 Schematic diagram at point B in the middle.

[0019] Figure 9 This is a schematic diagram of the dial structure of the present invention.

[0020] Figure 10 For the present invention Figure 9 Schematic diagram at point C.

[0021] In the diagram: 1-rocker arm; 2-sliding pin; 3-adjusting groove; 4-ball joint connecting rod; 5-crank dial; 6-top support plate; 7-support sleeve; 8-mounting movable sleeve; 9-stabilizing frame; 10-end connecting block; 11-adjusting electric cylinder bracket; 12-adjusting electric cylinder; 13-stabilizing slide bar; 14-limiting threaded sleeve; 15-drive motor; 16-shock-absorbing fixing sleeve; 17-threaded extrusion plate; 18-spline spindle; 19-limiting ring; 20-driven lever 201-Driven wedge; 202-First contact sliding slope; 203-First conductive surface; 21-Active dial; 211-Active wedge; 212-Second contact sliding slope; 213-Second conductive surface; 22-Handle housing; 23-Spring; 24-Spring seat; 25-Spring steel sheet; 26-Contact magnetic friction plate; 27-Contact friction cone surface; 28-Axial bearing; 29-Electromagnet; 30-Control board; 31-Lithium battery. Detailed Implementation

[0022] The following is in conjunction with the appendix Figures 1-10 The technical solution of the present invention will be further illustrated through specific embodiments.

[0023] This invention provides a myofascial relaxation massage device with adaptive mechanical feedback force adjustment, comprising a support shell 7, a top support plate 6 fixedly mounted on the support shell 7, a crank plate 5 rotatably mounted at the center of the upper surface of the top support plate 6, and a driven dial 20 rotatably mounted at the center of the lower surface of the top support plate 6. The driven dial 20 and the crank plate 5 are fixed to each other by a rotating shaft. An adjusting groove 3 is formed radially on the crank plate 5, and a sliding pin 2 is slidably mounted in the adjusting groove 3 via a limiting ring 19. The limiting ring 19 is used to prevent the sliding pin from sliding. 2. Separated from the adjusting groove 3; also includes a movable sleeve 8 and an adjusting electric cylinder 12, wherein the movable sleeve 8 and the sliding pin 2 are movably connected by a rocker arm 1, and the telescopic rod of the adjusting electric cylinder 12 drives the sliding pin 2 to slide radially along the crank disk 5 in the adjusting groove 3 through the ball joint connecting rod 4, thereby changing the wheelbase between the sliding pin 2 and the crank disk 5; a driving dial 21 is coaxially arranged below the driven dial 20, and a first detection unit and a second detection unit are respectively arranged at the circumferential position between the opposite surfaces of the driven dial 20 and the driving dial 21.

[0024] The first detection unit includes a driven wedge 201 fixedly engaged with the driven dial 20. The driven wedge 201 is provided with a first conductive surface 203 parallel to the surface of the driven dial 20 and a first contact sliding slope 202 inclined to the surface of the driven dial 20. The second detection unit includes an active wedge 211 fixedly engaged with the active dial 21. The active wedge 211 is provided with a second conductive surface 213 parallel to the surface of the active dial 21 and a second contact sliding slope 212 inclined to the surface of the active dial 21. The second conductive surface 213 and the first conductive surface 203 are in contact conductive engagement; the second contact sliding slope 212 and the first contact sliding slope 202 are in contact sliding engagement. A limiting threaded sleeve 14 is fixedly installed on the inner side of the support housing 7. A threaded extrusion disc 17 is coaxially threaded inside the limiting threaded sleeve 14. A spring seat 24 is rotatably installed at the center of the threaded extrusion disc 17 via an axial bearing 28. A plurality of spring steel plates 25 are evenly fixedly installed on the circumferential edge of the spring seat 24. A contact magnetic friction plate 26 is fixedly fixed at the end of each spring seat 24 away from the spring seat 24. A contact friction cone surface 27 is provided on the side of the threaded extrusion disc 17 facing the active dial 21. The contact friction cone surface 27 and the contact magnetic friction plate 26 are in contact frictional engagement. An electromagnet 29 is fixedly installed on the inner side of the threaded extrusion disc 17. The electromagnet 29 and the contact magnetic friction plate 26 are in magnetic engagement. A splined spindle 18 is inserted into the axial position of the spring seat 24 via a spline sliding mechanism. The active dial 21 is sleeved on the splined spindle 18 via a spline sliding mechanism. A spring 23 is sleeved on the outer side of the splined spindle 18 between the active dial 21 and the spring seat 24. The two ends of the spring 23 are fixedly engaged with the active dial 21 and the spring seat 24, respectively.

[0025] It also includes two handle housings 22, which are fastened together to form a sealed housing. A movable mounting sleeve 8 is enclosed within the two handle housings 22, allowing the movable mounting sleeve 8 to slide on the two handle housings 22. A support housing 7 is fixed within the two handle housings 22, and a lithium battery 31 and a control board 30 are also housed within the two handle housings 22. A drive motor 15 is fixedly mounted within the support housing 7 via a shock-absorbing fixing sleeve 16, and the output shaft of the drive motor 15 is fixedly engaged with a splined main shaft 18. The adjusting electric cylinder 12 is fixedly installed on the adjusting electric cylinder bracket 11, which is fixedly installed in the two handle housings 22. Two stabilizing slide rods 13 are also slidably installed on the adjusting electric cylinder bracket 11 along the axial direction of the adjusting electric cylinder 12. A stabilizing frame 9 is fixedly installed between the two stabilizing slide rods 13. An end connecting block 10 is fixedly provided on the stabilizing frame 9. The end connecting block 10 is fixedly installed at the end of the telescopic rod of the adjusting electric cylinder 12. The end connecting block 10 is movably connected to the sliding pin 2 through a ball joint connecting rod 4. Both ends of the ball joint connecting rod 4 are in movable cooperation with the sliding pin 2 and the end connecting block 10 using ball joints.

[0026] The working principle of the adaptive mechanical feedback force adjustment fascia relaxation massage device disclosed in this invention is as follows: The drive motor 15 is started, and the output shaft of the drive motor 15 drives the spline main shaft 18 to rotate. The spline main shaft 18 simultaneously drives the spring seat 24 and the active dial 21 to rotate, and the spring 23 between the active dial 21 and the spring seat 24 also rotates. The rotation of the active dial 21 causes the driven dial 20 to rotate due to the compression of the spring 23. Due to the pressure provided by the spring 23, the friction between the second contact sliding slope 212 and the first contact sliding slope 202 increases. This friction causes the driven dial 20 to rotate, and the rotation of the driven dial 20 causes the crank 5 to rotate synchronously. At this time, the sliding pin 2 in the adjusting groove 3 will rotate with the crank 5. The sliding pin 2 drives the movable sleeve 8 to reciprocate linearly on the handle housing 22 via the rocker arm 1. As the sliding pin 2 rotates with the crank spool 5, it drives the ball joint connecting rod 4 to rotate. Relative movement occurs between the ball joint connecting rod 4 and the end connecting block 10. Simultaneously, to change the displacement (oscillation amplitude) of the reciprocating motion of the movable sleeve 8 on the handle housing 22, only the adjusting cylinder 12 needs to be controlled. The extension rod of the adjusting cylinder 12 drives the end connecting block 10 to move. The end connecting block 10, through the ball joint connecting rod 4, drives the sliding pin 2 (which also moves the rocker arm 1 and the movable sleeve 8) to slide along the adjusting groove 3, changing the wheelbase between the sliding pin 2 and the crank spool 5, thereby changing the displacement of the crank spool 5 driving the movable sleeve 8 in reciprocating motion. The stabilizing rod 13 and the stabilizing frame 9 serve a stabilizing function when the extension rod of the adjusting cylinder 12 extends significantly.

[0027] The massage intensity can be adjusted by controlling the rotational speed of the output shaft of the drive motor 15. By changing the frequency of the reciprocating motion of the movable sleeve 8 (increasing the speed), the pressure can be increased. When the user applies too much force (pressing the device hard against the body with their hand), the reciprocating motion of the movable sleeve 8 will encounter great resistance (and the force acting on the body will also increase). To prevent excessive force, when the movable sleeve 8 is subjected to excessive resistance, the driven dial 20 and the driving dial 21 will rotate relative to each other. At this time, due to the restriction of the driven dial 20 from the movable sleeve 8, the first contact sliding slope 202 and the second contact sliding slope 212 will slide relative to each other, causing the driven wedge 201 and the driving wedge 211 to bounce relative to each other (the distance between the driven dial 20 and the driving dial 21 changes continuously). At the same time, the spring 23 is continuously compressed and released, and the driving dial 21 slides on the splined main shaft 18. At this time, the spline spindle 18 drives the active dial 21 to rotate but does not drive the driven dial 20 to rotate until the load on the movable sleeve 8 disappears or decreases. During the process of the driven wedge 201 and the active wedge 211 jumping relative to each other, the second contact sliding slope 212 and the first contact sliding slope 202 will slide relative to each other. Simultaneously, the second contact sliding slope 212 and the first contact sliding slope 202 continuously contact and separate, and the first conductive surface 203 and the second conductive surface 213 also continuously contact and separate. Therefore, when the first conductive surface 203 and the second conductive surface 213 are in contact, they conduct electricity; when they separate, the conductive signal disappears. Therefore, when the load at the movable sleeve 8 is not too large, the first conductive surface 203 and the second conductive surface 213 will not contact, and therefore there is no electrical signal. When the load at the movable sleeve 8 is too large, the first conductive surface 203 and the second conductive surface 213 generate periodically connected and disconnected electrical signals. By monitoring the duration of this periodically changing electrical signal, the speed of the output shaft of the drive motor 15 is controlled. The first conductive surface 203 and the second conductive surface 213 can generate periodic on-off and off-off electrical signals for a duration that lasts for a period of time (e.g., if the periodic on-off and off-off electrical signals are continuously generated between the first conductive surface 203 and the second conductive surface 213 within two seconds, the drive motor 15 will be de-energized; if it is less than two seconds, no action will be taken. The corresponding actual state is: the user applies an excessive load to the installation movable sleeve 8 for more than two seconds, or applies an excessive load to the installation movable sleeve 8 for less than two seconds). The shutdown state of the drive motor 15 can be adaptively controlled (first reduce the speed of the drive motor 15 by one gear; reduce the speed by one gear every certain period of time until it stops).The main purpose is to prevent users from applying excessive load to the installation sleeve 8 for extended periods, and to prevent excessive massage intensity from causing muscle damage or burning out the drive motor 15. When excessive intensity is applied, the massage stops, and the intensity is adjusted to the maximum acceptable intensity (at which point 15 will automatically stop). This adjustment continues until a suitable intensity is found. Since the intensity received by each user is different, different users can adjust it themselves. The threshold for sliding between the first contact sliding slope 202 and the second contact sliding slope 212 is controlled by the elasticity of the spring 23, achieved by changing the pressure of the spring 23 on the active dial 21. Specifically, this is achieved by controlling the rotation of the threaded compression disc 17 within the limiting threaded sleeve 14, causing the threaded compression disc 17 to axially displace within the limiting threaded sleeve 14. This changes the distance between the contact friction cone surface 27 on the threaded compression disc 17 and the active dial 21, thereby compressing or releasing the spring 23, thus changing the initial pressure of the spring 23 on the active dial 21. When the spline spindle 18 rotates normally, it drives the spring seat 24 to rotate. Because there is an axial bearing 28 between the spring seat 24 and the threaded extrusion disc 17, the spring seat 24 will not allow the threaded extrusion disc 17 to rotate within the limiting threaded sleeve 14 (the maximum static friction between the threaded extrusion disc 17 and the limiting threaded sleeve 14 is greater than the friction between the spring seat 24 and the threaded extrusion disc 17 through the axial bearing 28). When adjusting, it is necessary to control the rotation angle of the output shaft of the drive motor 15 and start the electromagnet 29. The electromagnet 29 generates magnetic force, which attracts the contact magnetic friction plate 26 to the contact friction cone surface. 27. The friction between the contact magnetic friction plate 26 and the contact friction cone 27 restricts the relative rotation of the spring seat 24 and the threaded extrusion disc 17 (the spring seat 24, spring steel plate 25 and contact magnetic friction plate 26 are integrated; when the contact magnetic friction plate 26 contacts the contact friction cone 27, the spring seat 24, spring steel plate 25, contact magnetic friction plate 26 and threaded extrusion disc 17 become integrated). At this time, the rotation of the spline spindle 18 will drive the threaded extrusion disc 17 to axially displace within the threaded sleeve 14, thereby changing the initial elastic force of the spring 23, and thus changing the threshold for stopping the drive motor 15. To ensure the rotation angle of the threaded extrusion disc 17 on the limiting threaded sleeve 14, which controls the output shaft of the drive motor 15, a sliding rheostat is formed between the spring seat 24 and the splined main shaft 18, and connected in series to the DC detection circuit. When the distance between the contact friction cone surface 27 and the active dial 21 changes, the position of the spring seat 24 on the splined main shaft 18 also changes, thus changing the resistance and the current in the DC detection circuit. The magnitude of the current controls the forward and reverse rotation and angle of the drive motor 15, achieving closed-loop control adjustment. For user convenience, a display screen is provided on the control board 30, and a transparent window is provided at the position where the handle housing 22 overlaps with the display screen for easy observation.

Claims

1. A myofascial relaxation massage device with adaptive mechanical feedback force adjustment, characterized in that: The device includes a support housing, on which a top support plate is fixedly mounted. A crank disc is rotatably mounted at the center of the upper surface of the top support plate, and a driven dial is rotatably mounted at the center of the lower surface of the top support plate. The driven dial and the crank disc are fixed together by a shaft. An adjustment groove is formed in the radial direction of the crank disc. A sliding pin is slidably mounted in the adjustment groove through a limiting ring. The limiting ring is used to prevent the sliding pin from separating from the adjustment groove. It also includes a movable sleeve and an adjusting electric cylinder. The movable sleeve is movably connected to the sliding pin by a rocker arm. The telescopic rod of the adjusting electric cylinder drives the sliding pin to slide radially along the crank disc in the adjusting groove through a ball joint connecting rod, thereby changing the wheelbase between the sliding pin and the crank disc. A drive dial is coaxially arranged below the driven dial, and a first detection unit and a second detection unit are respectively arranged at the circumferential position between the opposite surfaces of the driven dial and the drive dial; The first detection unit includes a driven wedge fixedly engaged with the driven dial, the driven wedge having a first conductive surface parallel to the surface of the driven dial and a first contact sliding slope inclined to the surface of the driven dial; the second detection unit includes an active wedge fixedly engaged with the active dial, the active wedge having a second conductive surface parallel to the surface of the active dial and a second contact sliding slope inclined to the surface of the active dial; wherein the second conductive surface and the first conductive surface are in contact conductive engagement; the second contact sliding slope and the first contact sliding slope are in contact sliding engagement. A limiting threaded sleeve is fixedly installed on the inner side of the support housing. A threaded extrusion disc is coaxially threaded inside the limiting threaded sleeve. A spring seat is rotatably installed at the center of the threaded extrusion disc via an axial force bearing. Multiple spring steel plates are evenly fixedly installed on the circumferential edge of the spring seat. A contact magnetic friction plate is fixed at the end of each spring seat away from the spring seat. A contact friction cone surface is provided on the side of the threaded extrusion disc facing the drive dial. The contact friction cone surface is in contact friction with the contact magnetic friction plate. An electromagnet is fixedly installed on the inner side of the threaded extrusion disc. The electromagnet is in magnetic cooperation with the contact magnetic friction plate. A splined spindle is inserted into the center of the spring seat via a spline sliding mechanism. The drive dial is mounted on the splined spindle via a spline sliding mechanism. A spring is mounted on the outer side of the splined spindle between the drive dial and the spring seat. The two ends of the spring are fixedly engaged with the drive dial and the spring seat, respectively.

2. The myofascial relaxation massage device with adaptive mechanical feedback force adjustment according to claim 1, characterized in that: It also includes two handle housings, which are snapped together to form a sealed housing. The movable mounting sleeve is enclosed by the two handle housings, allowing it to slide on the two handle housings. The support housing is fixed inside the two handle housings, and the two handle housings also contain a lithium battery and a control board.

3. The myofascial relaxation massage device with adaptive mechanical feedback force adjustment according to claim 2, characterized in that: A drive motor is fixedly installed inside the support housing by a shock-absorbing fixing sleeve, and the output shaft of the drive motor is fixedly engaged with the spline spindle.

4. The myofascial relaxation massage device with adaptive mechanical feedback force adjustment according to claim 3, characterized in that: The adjusting electric cylinder is fixedly mounted on the adjusting electric cylinder bracket, which is fixedly mounted in the housings of the two handles. Two stabilizing slide rods are also slidably mounted on the adjusting electric cylinder bracket along the axial direction of the adjusting electric cylinder. A stabilizing frame is fixedly mounted between the two stabilizing slide rods. An end connecting block is fixedly mounted on the stabilizing frame. The end connecting block is fixedly mounted on the end of the telescopic rod of the adjusting electric cylinder. The end connecting block and the sliding pin are movably connected through a ball joint. Both ends of the ball joint are in ball joint motion with the sliding pin and the end connecting block.

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