Low-noise fascia gun

Abstract

The utility model provides a low-noise fascia gun which comprises a first driver, a transmission assembly and a massage part, the transmission assembly comprises an eccentric wheel, a first sliding part and a transmission connecting rod, an output shaft of the first driver is connected with the eccentric wheel to drive the eccentric wheel to rotate, and the first sliding part and the eccentric wheel are installed together and rotate along with the eccentric wheel; the first sliding piece is provided with a transmission shaft, the distance between the axis of the transmission shaft and the axis of the output shaft of the driver is larger than zero, and the transmission shaft of the first sliding piece is connected with the massage piece through the transmission connecting rod. According to the low-noise fascia gun, the problem that the massage piece retreats due to counter-acting force generated when the massage piece strikes the fascia gun is solved, and vibration and noise generated during movement are reduced; the driver is more labor-saving and more stable in operation, and the service life of an internal movable part is longer and more stable.

Description

Technical Field

[0001] This application relates to the technical field of healthcare devices, and particularly to a low-noise fascia gun. Background Art

[0002] Massage devices are now common tools to help people relax and keep healthy. For example, fascia guns are great tools that can be used to help with stretching and recovery after exercise. There are often aches and pains in life that cannot be ignored. Whether it is professional athletes or ordinary leisure enthusiasts, they must have experienced muscle soreness. Fascia guns mainly massage large muscle groups through vibration, relax the fascia, and reduce the sense of soreness. Both professional athletes and amateur fitness enthusiasts can use them to make training more effective. Fascia guns use vibration frequency to relieve muscle spasms, increase blood flow, and greatly shorten the muscle recovery time. Currently, most fascia guns on the market have relatively large vibration noise and poor running stability. Moreover, these fascia guns can only achieve a single massage depth. Due to the difference in the thickness of the fascia layer in different parts of the human body, such as the head, hands, legs, buttocks, back, etc., the depth of the fascia layer in different positions is different, so the massage depth of the massage head also needs to be adjusted accordingly, but traditional fascia guns cannot make such adjustments.

[0003] Therefore, it is necessary to provide a low-noise fascia gun with stable operation, low noise, and adjustable stroke to solve the problems that the existing fascia guns on the market cannot adjust the movement depth of the massage head, have large noise, and poor stability. Summary of the Invention

[0004] The purpose of this application is to provide a low-noise fascia gun with low noise, adjustable stroke, and stable operation.

[0005] To achieve the purpose of this application, the following technical solutions are provided:

[0006] This application provides a low-noise fascia gun, which includes a first driver, a transmission component, and a massage component. The transmission component includes an eccentric wheel, a first sliding member, and a transmission connecting rod. The output shaft of the first driver is connected to the eccentric wheel to drive the eccentric wheel to rotate. The first sliding member is installed together with the eccentric wheel and rotates with the eccentric wheel. The first sliding member is provided with a transmission shaft, and the distance between the axis of the transmission shaft and the axis of the output shaft of the driver is greater than zero. The transmission shaft of the first sliding member is connected to the massage component through the transmission connecting rod.

[0007] When usually using a fascia gun for massage and hitting, the reaction force will be transmitted to the internal structure through the massage component, which will affect the fascia gun with recoil force and generate vibration and noise. The design of this application can effectively reduce vibration and noise and improve the stability of the hitting force.

[0008] In some embodiments, the first sliding member is connected to one end of the transmission link through the transmission shaft and can rotate relative to each other. The other end of the transmission link is connected to the massage member and can rotate relative to each other.

[0009] When the transmission shaft rotates with the eccentric wheel, the axis of the transmission shaft rotates around the axis of the output shaft of the first driver. That is, the transmission shaft of the first sliding member rotates around the axis of the output shaft of the first driver. One end of the transmission link is movably connected to the transmission shaft of the first sliding member and can rotate relative to each other. The other end of the transmission link is connected to the connecting shaft of the massage member and can rotate relative to each other. The transmission link follows the movement of the transmission shaft, thereby driving the movement of the transmission link, and further driving the massage member to perform a lateral movement.

[0010] In some embodiments, the massage member is provided with a connecting shaft. The two ends of the transmission link are respectively provided with a first transmission ring and a second transmission ring. The transmission shaft is connected to the first transmission ring of the transmission link and can rotate relative to each other. The second transmission ring of the transmission link is connected to the connecting shaft of the massage member and can rotate relative to each other. In a specific embodiment, a connecting bridge is provided between the first transmission ring and the second transmission ring, and the connecting bridge extends horizontally. The connecting bridge is provided with a stepped design to facilitate the installation of internal components.

[0011] In some embodiments, the axis of the transmission shaft of the first sliding member is parallel to the axis of the output shaft of the first driver; the axis of the connecting shaft of the massage member is parallel to the axis of the output shaft of the first driver.

[0012] In some embodiments, a bearing is provided between the transmission shaft and the first transmission ring; a bearing is provided between the connecting shaft and the second transmission ring.

[0013] In some embodiments, the eccentric wheel is provided with a horizontally arranged sliding groove, and the first sliding member is arranged in the sliding groove. The first sliding member can move relative to the sliding groove. The first sliding member can move relative to the sliding groove to change the position of the first sliding member, and accordingly change the distance between the axis of the transmission shaft of the first sliding member and the axis of the output shaft of the first driver, that is, change the striking stroke of the massage member.

[0014] In some embodiments, the translation trajectory line of the axis of the transmission shaft of the first sliding member moving relative to the sliding groove does not intersect with the axis of the output shaft of the first driver.

[0015] In some embodiments, the output shaft of the first driver directly drives the eccentric wheel to rotate, and the eccentric wheel drives the first slider to rotate around the output shaft to achieve the striking of the massage member. In other embodiments, the transmission assembly further includes a second slider, the second slider is connected between the output shaft of the first driver and the first slider, and the output shaft of the first driver, the second slider, and the first slider rotate synchronously.

[0016] In some embodiments, assembly feet are provided below the second slider, and the assembly feet are inserted into the sliding grooves to be cooperatively installed with the first slider. The cooperative installation can be achieved through special-shaped cooperation or other installation fixing members to enable the second slider and the first slider to rotate synchronously.

[0017] In some embodiments, the transmission assembly further includes a pin. A slotted groove is provided on the first slider, and communicating pin holes are provided on the eccentric wheel and the assembly feet. The pin passes through the slotted groove and the pin holes to install the eccentric wheel, the second slider, and the first slider together and rotate them synchronously. At the same time, the first slider and the second slider can move relative to each other along the slotted groove. The inclination direction of the slotted groove intersects with the axis of the output shaft of the first driver to form an angle. The relative movement between the first slider and the second slider along the slotted groove causes a relative position change with a lateral component between the first slider and the second slider. Therefore, the lateral position of the first slider can be adjusted by the movement of the second slider.

[0018] In some embodiments, the slotted groove transversely penetrates the first slider, and the penetration direction intersects with the opening direction of the sliding groove. Further, the transverse penetration direction of the slotted groove is perpendicular to the opening direction of the sliding groove, and the pin is inserted along the direction perpendicular to the opening direction of the sliding groove.

[0019] In some embodiments, the pin and the pin hole can be designed with a special-shaped cooperation structure to make the synchronous rotation structure of the eccentric wheel, the second slider, and the first slider more stable. For example, the cross-sections of the pin and the pin hole are rectangular, oval, or racetrack-shaped, etc.

[0020] In some embodiments, a positioning protrusion extending along the direction of the sliding groove is provided on the first slider, and a matching positioning hole is provided on the eccentric wheel. The positioning protrusion is inserted into the positioning hole to make the cooperative installation between the first slider and the eccentric wheel more stable when the first slider moves along the sliding groove.

[0021] In some embodiments, a fitting sleeve extends upward from the eccentric wheel. The fitting sleeve has a through hole communicating with the sliding groove, and the shape of the through hole is the same as the cross-sectional shape of the output shaft of the first driver. The eccentric wheel is installed on the output shaft through the fitting sleeve.

[0022] In some embodiments, the second sliding member is provided with an assembly hole, the shape of the assembly hole is consistent with the outer contour of the cross-section of the assembly sleeve, the assembly sleeve and the output shaft of the first driver are fitted and installed and pass through the assembly hole, so that the output shaft of the first driver, the second sliding member and the eccentric wheel rotate synchronously.

[0023] In some embodiments, it further includes an adjustment assembly, the adjustment assembly includes a second driver and a stroke adjuster, the stroke adjuster includes an adjuster body, the adjuster body is sleeved on the second sliding member, and the two can rotate relative to each other.

[0024] In some embodiments, the second sliding member is provided with a circumferential positioning flange, the adjuster body presses on the positioning flange, so that the second sliding member and the stroke adjuster are axially fixed relative to each other, and the second sliding member moves axially synchronously with the stroke adjuster.

[0025] In some embodiments, a bearing is connected between the second sliding member and the stroke adjuster. The outer ring of the bearing is connected to the stroke adjuster, and the inner ring of the bearing is connected to the second sliding member, so that while the second sliding member rotates together with the eccentric wheel, the adjuster cannot rotate.

[0026] In some embodiments, the stroke adjuster further includes an extension column fixedly connected or integrally formed with the adjuster body, the output end of the second driver is provided with an adjustment rod, and the adjustment rod cooperates with the extension column to make the stroke adjuster move axially up and down relative to the adjustment rod.

[0027] In some embodiments, the adjustment rod is provided with an external thread, and the extension column of the stroke adjuster is provided with a matching internal thread. The driving output of the second driver can drive the stroke adjuster to move axially up and down through the thread fit between the adjustment rod and the extension column. When the stroke adjuster moves up / down axially, it drives the second sliding member to move up / down (meanwhile, the second sliding member can rotate together with the first sliding member and the eccentric wheel). When the second sliding member moves up / down, it generates an upward / downward thrust on the plug pin, and the first sliding member moves through the force on the inclined groove on the first sliding member, so as to adjust the first sliding member to approach / away from the rotation center of the first driver.

[0028] In some embodiments, a protective cover and shock-absorbing soft rubber are provided outside the massage member.

[0029] The technical solution of this application solves the problem that the reaction force during the impact of the massage part causes insufficient resistance to the recoil force of the first sliding part and the second sliding part, solves the phenomenon of piston retraction of the massage part during use, reduces vibration and noise during movement; increases the ability to resist recoil force; makes the operation of the drive more labor-saving and stable, and the service life of the internal moving parts is higher and more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is an exploded view of the low-noise fascia gun of this application;

[0031] Figure 2 is one of the perspective views of the low-noise fascia gun of this application;

[0032] Figure 3 is another perspective view of the low-noise fascia gun of this application;

[0033] Figure 4 is a cross-sectional view of the low-noise fascia gun of this application;

[0034] Figure 5 is a schematic diagram comparing the movement states of the massage part of the first sliding part of the low-noise fascia gun of this application at two different positions;

[0035] Figure 6 is a schematic diagram of the movement direction and force direction of the components of the low-noise fascia gun of this application;

[0036] Figure 7 is a schematic diagram comparing the movement radii of the transmission shafts of the first sliding part of the low-noise fascia gun of this application at two different positions;

[0037] Figure 8 is a schematic diagram of the geometric relationship between the transmission shaft center and the output shaft center of the low-noise fascia gun of this application when the first sliding part is at two different positions;

[0038] Figure 9 is a schematic diagram of the relationship between the movement direction of the first sliding part of the low-noise fascia gun and the change in the movement radius of the transmission shaft;

[0039] Figure 10 is a schematic diagram of the structure of the low-noise fascia gun of this application at the maximum stroke position of the massage part;

[0040] Figure 11 is a cross-sectional view of the low-noise fascia gun of this application at the maximum stroke position of the massage part;

[0041] Figure 12 is a schematic diagram of the structure of the low-noise fascia gun of this application at the minimum stroke position of the massage part;

[0042] Figure 13 is a cross-sectional view of the low-noise fascia gun of this application at the minimum stroke position of the massage part. DETAILED DESCRIPTION OF THE INVENTION

[0043] Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application can be more thoroughly understood and the scope of the present application can be fully conveyed to those skilled in the art.

[0044] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0045] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0046] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature. These relative relationship terms, such as "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "upper", "front end", "rear side", etc. This spatially relative relationship term is intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figure is flipped, the element described as "below" or "beneath" other elements or features will then be oriented as "above" or "upper" other elements or features. Thus, the exemplary term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatially relative descriptors used herein are interpreted accordingly.

[0047] Please refer to Figures 1 to 4 , a specific embodiment of the low-noise fascia gun of the present application. The low-noise fascia gun includes a first driver 100, a transmission assembly, and a massage member 910. In this embodiment, the transmission assembly includes an eccentric wheel 200, a first slider 300, a second slider 400, and a transmission link 500. The output shaft 101 of the first driver 100 is connected to the eccentric wheel 200 to drive the eccentric wheel 200 to rotate. The first slider 300 is mounted together with the eccentric wheel 200 and rotates with the eccentric wheel 200. The second slider 400 is connected between the output shaft 101 of the first driver 100 and the first slider 300. The output shaft of the first driver 100, the eccentric wheel 200, the second slider 400, and the first slider 300 rotate synchronously. One end of the first slider 300 is connected to the transmission link 500 and is relatively rotatable. The other end of the transmission link 500 is connected to the massage member 910 and is relatively rotatable. The first driver 100 employs a drive motor.

[0048] Specifically, the first slider 300 is provided with a transmission shaft 310. The first slider 300 is connected to one end of the transmission link 500 through the transmission shaft 310. The distance between the axis of the transmission shaft 310 and the axis of the output shaft of the driver is greater than zero. The axis of the transmission shaft 310 of the first slider 300 is parallel to the axis of the output shaft of the first driver 100.

[0049] When the transmission shaft 310 rotates with the eccentric wheel 200, the axis of the transmission shaft 310 rotates around the axis of the output shaft of the first driver 100. That is, the transmission shaft 310 of the first slider 300 rotates around the axis of the output shaft of the first driver 100. Since one end of the transmission link 500 is movably connected to the transmission shaft 310 of the first slider 300 and can rotate relative to it, and the other end of the transmission link 500 is connected to the connecting shaft 9101 of the massage member 910 and can rotate relative to it, the transmission link 500 moves along with the transmission shaft 310, thereby driving the transmission link 500 to move, and further driving the massage member 910 to perform a lateral movement, that is, a piston movement of striking and retracting. The maximum difference in the lateral change of the movement of one end of the transmission link 500 is the striking stroke of the massage member 910, which is also twice the movement radius of the transmission shaft 310 of the first slider 300, that is, twice the distance between the axis of the transmission shaft 310 of the first slider 300 and the axis of the output shaft of the first driver 100.

[0050] Specifically, the massage member 910 is provided with a connecting shaft 9101. The two ends of the transmission link 500 are respectively provided with a first transmission ring 510 and a second transmission ring 530. The transmission shaft 310 is connected to the first transmission ring 510 of the transmission link 500 and can rotate relative to it. A bearing 924 is provided between the transmission shaft 310 and the first transmission ring 510. The second transmission ring 530 of the transmission link 500 is connected to the connecting shaft 9101 of the massage member 910 and can rotate relative to it. A bearing 924 is provided between the connecting shaft 9101 and the second transmission ring 530. The axis of the connecting shaft 9101 of the massage member 910 is parallel to the axis of the output shaft of the first driver 100. A connecting bridge 520 is provided between the first transmission ring 510 and the second transmission ring 530, and the connecting bridge 520 extends laterally. The connecting bridge 520 is provided with a stepped design to facilitate the installation of internal components.

[0051] Specifically, the eccentric wheel 200 is provided with a laterally arranged sliding groove 220. The first slider 300 is arranged in the sliding groove 220. The first slider 300 can move relative to the sliding groove 220 to change the position of the first slider 300, and accordingly change the distance between the axis of the transmission shaft 310 of the first slider 300 and the axis of the output shaft of the first driver 100, that is, change the striking stroke of the massage member 910.

[0052] The eccentric wheel 200 extends upwardly with a fitting sleeve 210. The fitting sleeve 210 has a perforation (not labeled) communicating with the sliding groove 220. The shape of the perforation is the same as the cross-sectional shape of the output shaft 101 of the first driver. The eccentric wheel 200 is mounted on the output shaft 101 through the fitting sleeve 210. The second sliding member 400 is provided with a fitting hole 410. The shape of the fitting hole 410 is in conformity with the outer contour of the cross-section of the fitting sleeve 210. The fitting sleeve 210 and the output shaft 101 of the first driver 100 are fitted and installed and pass through the fitting hole 410, so that the output shaft of the first driver 100, the second sliding member 400, and the eccentric wheel 200 rotate synchronously.

[0053] An assembly foot 430 is provided below the second sliding member 400. The assembly foot 430 is inserted into the sliding groove 220 and is fitted and installed with the first sliding member 300. The fitting and installation can be achieved through special-shaped fitting or other installation fixing members to enable the second sliding member 400 and the first sliding member 300 to rotate synchronously.

[0054] The transmission assembly further includes a pin 330. An inclined groove 320 is provided on the first sliding member 300. The eccentric wheel 200 and the assembly foot 430 are provided with a communicating pin hole 230. The pin 330 passes through the inclined groove 320 and the pin hole 230, so that the eccentric wheel 200, the second sliding member 400, and the first sliding member 300 are installed together and rotate synchronously. At the same time, the first sliding member 300 and the second sliding member 400 can move relative to each other along the inclined groove 320. The inclined direction of the inclined groove 320 intersects with the axis of the output shaft of the first driver 100 to form an angle. The relative movement of the first sliding member 300 and the second sliding member 400 along the inclined groove 320 causes a relative position change with a lateral component between the first sliding member 300 and the second sliding member 400. Therefore, the lateral position of the first sliding member 300 can be adjusted by the movement of the second sliding member 400.

[0055] The inclined groove 320 transversely penetrates the first sliding member 300, and the penetration direction intersects with the opening direction of the sliding groove 220. Further, the transverse penetration direction of the inclined groove 320 is perpendicular to the opening direction of the sliding groove 220, and the pin 330 is inserted along the direction perpendicular to the opening direction of the sliding groove 220.

[0056] The pin 330 and the pin hole 230 can be designed with a special-shaped fitting structure to make the synchronous rotation structure of the eccentric wheel 200, the second sliding member 400, and the first sliding member 300 more stable. For example, the cross-section of the pin 330 and the pin hole 230 is rectangular, oval, or racetrack-shaped, etc.

[0057] A positioning projection 340 extending along the direction of the sliding groove 220 is provided on the first sliding member 300, and a matching positioning hole 240 is provided on the eccentric wheel 200. The positioning projection 340 is inserted into the positioning hole 240 to make the fitting installation of the first sliding member 300 and the eccentric wheel 200 more stable when the first sliding member 300 moves along the sliding groove 220.

[0058] The fascia gun further includes an adjusting assembly. The adjusting assembly includes a second driver 600 and a stroke adjuster 700. The stroke adjuster 700 includes an adjuster body 720. The adjuster body 720 is sleeved on the second sliding member 400, and the two can rotate relative to each other. Specifically, a bearing 924 is connected between the second sliding member 400 and the stroke adjuster 700. The outer ring of the bearing 924 is connected to the stroke adjuster 700, and the inner ring of the bearing 924 is connected to the second sliding member 400, so that while the second sliding member 400 rotates together with the eccentric wheel 200, the adjuster cannot perform a rotational movement. The second sliding member 400 is provided with a circumferential positioning flange 420. The adjuster body 720 presses on the positioning flange 420 to make the second sliding member 400 and the stroke adjuster 700 axially relatively fixed, and the second sliding member 400 moves axially synchronously with the stroke adjuster 700.

[0059] The stroke adjuster 700 further includes an extension column 720 fixedly connected or integrally formed with the adjuster body 720. The output end of the second driver 600 is provided with an adjusting rod 610. The adjusting rod 610 cooperates with the extension column 720 to make the stroke adjuster 700 move axially up and down relative to the adjusting rod 610. Specifically, the adjusting rod 610 is provided with an external thread, and the extension column 720 of the stroke adjuster 700 is provided with a matching internal thread. The driving output of the second driver 600 can drive the stroke adjuster 700 to move axially up and down through the thread fit between the adjusting rod 610 and the extension column 720. When the stroke adjuster 700 moves up / down axially, it drives the second sliding member 400 to move up / down (meanwhile, the second sliding member 400 can rotate together with the first sliding member 300 and the eccentric wheel 200). When the second sliding member 400 moves up / down, it generates an upward / downward thrust on the plug pin 330. The first sliding member 300 moves through the force on the inclined groove 320 on the first sliding member 300, so as to adjust the first sliding member 300 to approach / away from the rotation center of the first driver 100.

[0060] Please refer to Figures 5 to 13, specifically, the translation trajectory line of the axis of the transmission shaft 310 of the first slider 300 moving relative to the sliding groove 220 does not intersect the axis of the output shaft of the first driver 100, that is, the axis of the transmission shaft 310 of the first slider 300 does not pass through the axis of the output shaft of the first driver 100 along the route of the transmission shaft 310 of the first slider 300. As Figure 5 Figures 5a and 5b show schematic diagrams comparing the movement states of the massage members of the first slider 300 at two different positions. Figure 5 In Figure a, O3 and Figure 5 In Figure b, O2 is the translation trajectory line of the axis of the transmission shaft 310 of the first slider 300 moving relative to the sliding groove 220, and O1 is a reference line passing through the axis of the output shaft of the first driver 100 and parallel to the translation trajectory lines O2 and O3. It can be seen that the translation trajectory line does not intersect the axis of the output shaft of the first driver 100. The axis 310 of the transmission shaft 310 of the first slider 300 makes a circular motion around the axis of the output shaft 101 of the first driver 100. Moreover, after the first slider 300 adjusts its position along the sliding groove 220, the radius of the circular motion changes accordingly. Figure 6 In the figure, the position of line E is the assembly slot where the first slider 300 is installed on the eccentric wheel 200. When hitting, the force of the massage member 910 retreating acts on line E, increasing the ability to resist the recoil force. In the figure, the x direction is the hitting direction of the massage member 910, and the y direction is the moving direction of the first slider 300. Since the force when the massage member 910 retreats and the force in the moving direction of the first slider 300 are not on the same axis but have a certain angle, the massage member 910 will not force the first slider 300 to slide synchronously when it retreats.

[0061] The connecting line between the axis of the transmission shaft 310 of the first slider 300 and the axis of the output shaft of the first driver 100, the translation trajectory line along which the axis of the transmission shaft 310 moves relative to the sliding groove 220, and the perpendicular line from the axis of the output shaft of the first driver 100 to the translation trajectory line. When the intersection point of the axis of the transmission shaft 310, the perpendicular line, and the translation trajectory line do not coincide, these three lines intersect to form a right triangle. The hypotenuse of the right triangle is the distance between the axis of the transmission shaft 310 and the axis of the output shaft. As the transmission shaft 310 of the first slider 300 moves relative to the sliding groove 220, the right triangle changes, and the distance between the axis of the transmission shaft 310 and the axis of the output shaft also changes accordingly, that is, the striking stroke of the massage member 910 changes. When the distance between the axis of the transmission shaft 310 and the axis of the output shaft is the largest, the rotation radius of the axis of the transmission shaft 310 rotating around the axis of the output shaft is the largest, which is the maximum adjustable striking stroke of the massage member 910. When the intersection point of the axis of the transmission shaft 310, the perpendicular line, and the translation trajectory line coincides, the distance between the axis of the transmission shaft 310 and the axis of the output shaft is the smallest, and the rotation radius of the axis of the transmission shaft 310 rotating around the axis of the output shaft is the smallest, that is, the striking stroke of the massage member 910 is the smallest.

[0062] Please refer to Figures 7 to 13 , Figure 7 is a schematic diagram of the geometric relationship between the axis of the transmission shaft 310 and the axis of the output shaft 101 of the first driver 100 when the first slider 300 is in two different positions. Among them, 7a shows that when the first slider 300 is in the upper position of the sliding groove 220 in the figure, the distance between the axis of the transmission shaft 310 and the axis of the output shaft 101 is larger, and 7b shows that when the first slider 300 is in the lower position of the sliding groove 220 in the figure, the distance between the axis of the transmission shaft 310 and the axis of the output shaft 101 is smaller. Here, the terms "upper" and "lower" are only for convenience of description and are for the display in Figure 7 and do not constitute a limitation to this application. Figure 8 is a schematic diagram of the geometric relationship between the transmission shaft center and the output shaft center when the first slider 300 is in two different positions. Figure 9Schematic diagram of the relationship between the movement direction of the first slider 300 and the change in the movement radius of the transmission shaft. Point A is the rotation center of the output shaft 101 of the first driver 100, point C is the center of the transmission shaft 310 of the first slider 300 (connected to the connecting end of the massage member 910 through the transmission link 500), line b is the translation trajectory line of the axis of the transmission shaft 310 moving relative to the sliding groove 220, line a is the perpendicular line from the center of the output shaft of the first driver 100 to the translation trajectory line, point B is the intersection of the perpendicular line and the translation trajectory line, and the length of line c is the rotation radius of the transmission shaft 310 of the first slider 300. By adjusting the position of point C so that it moves along the sliding groove 220, that is, along side b of the triangle in the figure, the distance between point C and point A is changed, and the rotation radius of the transmission shaft 310 of the first slider 300 is changed. When the first slider 300 slides along the sliding groove 220 to coincide with point B, the distance d3 between A and B is the rotation radius of the transmission shaft 310 of the first slider 300 at this time, and the stroke of the massage member 910 is the smallest when the center of the transmission shaft 310 of the first slider 300 is at this position, as shown in Figure 8 shown in Fig. Figure 9 b. The first slider 300 slides along the sliding groove 220, as shown in Figure 9 Fig. Figure 8 b. The axis of the transmission shaft slides from the position where it coincides with point B. For example, when it slides to point C2, the center of the transmission shaft 310 of the first slider 300 is at position C2, and the distance from it to the rotation center A of the output shaft 101 of the first driver 100 is d2, and the stroke of the massage member 910 is related to d2. As shown in

[0063] Please refer to Figures 10 to 13 for details. By driving the stroke regulator 700 to move up and down axially through the adjusting rod 610 at the output end of the second driver 600, the second slider 400 is driven to move up and down, generating an upward / downward thrust on the bolt 330. The first slider 300 moves through the force on the inclined groove 320 on the first slider 300, thereby adjusting the distance between the center of the transmission shaft 310 of the first slider 300 and the rotation center of the first driver 100, and realizing the adjustment of the stroke of the massage member 910. As shown in Figure 10 、 11As shown, when the bolt 330 slides to the lowest position along the inclined groove and the first slider 300 slides along the sliding groove 220 to the position where the distance between the axis of the transmission shaft 310 and the axis of the output shaft 101 is the maximum, the stroke of the massage member 910 is the largest; as Figure 12 , 13 shown, when the bolt 330 slides to the uppermost position along the inclined groove and the first slider 300 slides along the sliding groove 220 to the position where the distance between the axis of the transmission shaft 310 and the axis of the output shaft 101 is the minimum, the stroke of the massage member 910 is the smallest. Here, the terms "upper" and "lower" are only for convenience of description and are for the display in the drawings, and do not limit the present application. Moreover, the relationship between the sliding direction of the bolt 330 and the change in the distance between the axis of the transmission shaft 310 and the axis of the output shaft 101 is only for this embodiment and does not limit the present application. For example, in other embodiments, the setting direction of the inclined groove can be changed, and the change relationship will be different.

[0064] In the technical solution of the present application, the translation trajectory line of the first slider 300 adjusting and sliding along the sliding groove 220 does not intersect with the axis of the output shaft of the first driver 100. When adjusting the stroke, the axis of the transmission shaft 310 of the first slider 300 and the axis of the output shaft of the first driver 100 have a triangular change relationship. The piston movement (striking / retreating) direction of the massage member 910 has a certain angle with the translation trajectory line of the first slider 300. The recoil force generated during striking can be resisted by the side of the sliding groove 220, which can eliminate the vibration and noise caused by the linkage of the first slider 300 due to the recoil force. The technical solution of the present application can effectively reduce vibration and noise and improve the stability of the striking force.

[0065] The technical solution of the present application solves the problem that the recoil force resistance of the first slider 300 and the second slider 400 is insufficient due to the reaction force during the striking of the massage member 910, solves the piston retreat phenomenon of the massage member 910 during use, reduces the vibration and noise during movement; increases the recoil force resistance ability; makes the operation of the driver more labor-saving and stable, and the service life of the internal moving parts is higher and more stable.

[0066] In some other embodiments, the transmission assembly includes an eccentric wheel 200, a first slider 300, and a transmission connecting rod 500. The first slider 300 can be directly connected to the output shaft of the first driver 100 and rotate synchronously therewith. The transmission shaft 310 of the first slider 300 is disposed offset from the center of the output shaft of the first driver 100.

[0067] In a specific embodiment, a protective cover 911 and a shock-absorbing soft rubber 912 are provided outside the massage member 910, and a shock-absorbing pad 102 is further provided below the first motor 100. The fascia gun further includes a first housing 921, a second housing 922, a third housing 923, a first bracket 931, a second bracket 932, a battery 941, a circuit board 942, and a button 943. The first housing 921, the second housing 922, and the third housing 923 are combined to form an outer shell. The first driver 100, the transmission assembly, the massage member 910, the adjustment assembly, the first bracket 931, the second bracket 932, the battery 941, and the circuit board 942 are placed in the outer shell. The first bracket 931 and the second bracket 932 are assembled together to install and position the transmission assembly, the massage member 910, and the adjustment assembly. The first driver 100 and the second driver 600 are electrically connected to the circuit board 942. The button 943 can be used for operation and control. The battery 941 can be a primary battery or a secondary battery, or it can be powered by connecting to the mains without installing a battery.

[0068] The above are only the preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Any equivalent transformation based on the technical solution of the present application falls within the protection scope of the present application.

Claims

1. A low-noise fascia gun, characterized in that, It includes a first driver, a transmission assembly, and a massage member. The transmission assembly includes an eccentric wheel, a first sliding member, and a transmission connecting rod. The output shaft of the first driver is connected to the eccentric wheel to drive the eccentric wheel to rotate. The first sliding member is installed together with the eccentric wheel and rotates with the eccentric wheel. The first sliding member is provided with a transmission shaft, and the distance between the axis of the transmission shaft and the axis of the output shaft of the driver is greater than zero. The transmission shaft of the first sliding member is connected to the massage member through the transmission connecting rod.

2. The low-noise fascia gun according to claim 1, wherein The first sliding member is connected to one end of the transmission connecting rod through the transmission shaft and can rotate relative to each other. The other end of the transmission connecting rod is connected to the massage member and can rotate relative to each other.

3. The low-noise fascia gun according to claim 2, wherein The massage member is provided with a connecting shaft. The two ends of the transmission connecting rod are respectively provided with a first transmission ring and a second transmission ring. The transmission shaft is connected to the first transmission ring of the transmission connecting rod and can rotate relative to each other; the second transmission ring of the transmission connecting rod is connected to the connecting shaft of the massage member and can rotate relative to each other.

4. The low-noise fascia gun according to claim 3, wherein, A bearing is provided between the transmission shaft and the first transmission ring; a bearing is provided between the connecting shaft and the second transmission ring.

5. The low-noise myofascial gun according to claim 3, wherein, A connecting bridge is provided between the first transmission ring and the second transmission ring, and the connecting bridge extends horizontally.

6. The low-noise fascia gun according to any one of claims 1 to 5, characterized in that, The eccentric wheel is provided with a horizontally arranged sliding groove, and the first sliding member is arranged in the sliding groove, and the first sliding member can move relative to the sliding groove.

7. The low-noise fascia gun according to claim 6, wherein, The translation trajectory line of the axis of the transmission shaft of the first sliding member moving relative to the sliding groove does not intersect with the axis of the output shaft of the first driver.

8. The low-noise fascia gun according to claim 7, wherein, The transmission assembly further includes a second sliding member, and the second sliding member is connected between the output shaft of the first driver and the first sliding member. The output shaft of the first driver, the second sliding member, and the first sliding member rotate synchronously.

9. The low-noise fascia gun according to claim 8, wherein, An assembly foot is provided below the second sliding member, and the assembly foot is inserted into the sliding groove to be fitted and installed with the first sliding member.

10. The low-noise fascia gun according to claim 9, wherein, The transmission assembly further includes a pin. The first sliding member is provided with an inclined groove, and the eccentric wheel and the assembly foot are provided with communicating pin holes. The pin passes through the inclined groove and the pin holes to install the eccentric wheel, the second sliding member, and the first sliding member together and rotate synchronously. At the same time, the first sliding member and the second sliding member can move relative to each other along the inclined groove, and the inclined direction of the inclined groove intersects with the axis of the output shaft of the first driver to form an angle.

11. The low-noise fascia gun according to claim 10, wherein The inclined groove horizontally penetrates the first sliding member, and the penetration direction intersects with the opening direction of the sliding groove.

12. The low-noise fascia gun according to claim 6, wherein, The first sliding member is provided with a positioning protrusion extending along the direction of the sliding groove, and the eccentric wheel is provided with a matching positioning hole. The positioning protrusion is inserted into the positioning hole to make the fitting installation of the first sliding member and the eccentric wheel more stable when the first sliding member moves along the sliding groove.

13. The low-noise fascia gun according to claim 8, wherein The eccentric wheel extends upward with a fitting sleeve. The fitting sleeve has a perforation communicating with the sliding groove, and the shape of the perforation is the same as the cross-sectional shape of the output shaft of the first driver. The eccentric wheel is installed on the output shaft through the fitting sleeve.

14. The low-noise fascia gun according to claim 13, wherein, The second sliding member is provided with an assembly hole, and the shape of the assembly hole is matched with the outer contour of the cross-section of the assembly sleeve. The assembly sleeve and the output shaft of the first driver are fitted and installed and pass through the assembly hole, so that the output shaft of the first driver, the second sliding member and the eccentric wheel rotate synchronously.

15. The low-noise fascia gun according to claim 8, wherein, It further includes an adjustment assembly, and the adjustment assembly includes a second driver and a stroke adjuster. The stroke adjuster includes an adjuster body, and the adjuster body is sleeved on the second sliding member and can rotate relative to each other.

16. The low-noise fascia gun according to claim 15, wherein, The second sliding member is provided with a circumferential positioning flange, and the adjuster body is pressed on the positioning flange to make the second sliding member and the stroke adjuster axially fixed relative to each other, and the second sliding member moves axially synchronously with the stroke adjuster.

17. The low-noise fascia gun according to claim 16, wherein, A bearing is connected between the second sliding member and the stroke adjuster.

18. The low-noise fascia gun according to claim 15, wherein, The stroke adjuster further includes an extension column fixedly connected or integrally formed with the adjuster body. The output end of the second driver is provided with an adjustment rod, and the adjustment rod is matched with the extension column to make the stroke adjuster move axially up and down relative to the adjustment rod.

19. The low-noise fascia gun according to claim 18, wherein, The adjustment rod is provided with an external thread, and the extension column of the stroke adjuster is provided with a matching internal thread. The driving output of the second driver can drive the stroke adjuster to move axially up and down through the thread fit between the adjustment rod and the extension column.

20. The low-noise fascia gun according to any one of claims 1 to 5, characterized in that, A protective sleeve and a shock-absorbing soft rubber are provided outside the massage member.

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