Low-noise fascia gun

Abstract

A low-noise fascia gun, comprising a first driver (100), a transmission assembly, a massage member (910). The transmission assembly comprises an eccentric wheel (200), a first sliding member (300), and a transmission connecting rod (500). An 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 sliding member (300) and the eccentric wheel (200) are mounted together and rotate along with the eccentric wheel (200). The first sliding member (300) is connected to and rotates relative to one end of the transmission connecting rod (500), and the other end of the transmission connecting rod (500) is connected to and rotates relative to the massage member (910). The low-noise fascia gun overcomes the retraction of the massage member (910) caused by a recoil force during impact of the massage member (910), reduces the vibration and noise during movement of the massage member (910), makes the operation of the first driver (100) more labor-saving and more stable, and enables internal movable members to have a longer service life and be more stable.

Description

Low-noise fascia gun Technical Field

[0001] This application relates to the field of medical and health care equipment technology, specifically to a low-noise fascia gun. Background Technology

[0002] Massage devices are now common tools for relaxation and health maintenance. For example, fascia guns are excellent for post-workout stretching and recovery. Muscle soreness is a common problem, experienced by everyone from professional athletes to casual enthusiasts. Fascia guns use vibration to massage large muscle groups, relaxing the fascia and reducing soreness. Both professional athletes and amateur fitness enthusiasts can use them for more effective training. Fascia guns utilize vibration frequency to relieve muscle spasms, increase blood flow, and significantly shorten muscle recovery time. Currently, most fascia guns on the market have significant vibration noise and poor operational stability. Furthermore, these guns can only achieve a single massage depth. Due to the varying thickness of the fascia layer in different parts of the body (such as the head, hands, legs, buttocks, and back), the massage depth of the massage head must be adjusted accordingly, something traditional fascia guns cannot do.

[0003] Therefore, it is necessary to provide a low-noise fascia gun that operates smoothly, has low noise, and adjustable stroke to solve the problems of existing fascia guns on the market, such as the inability to adjust the depth of massage head movement, high noise, and poor stability. Technical issues

[0004] The purpose of this application is to provide a low-noise fascia gun that is quiet, has an adjustable stroke, and operates smoothly. Technical solutions

[0005] To achieve the purpose of this application, the following technical solution is provided:

[0006] This application provides a low-noise fascia gun, which includes a first driver, a transmission assembly, and a massage component. The transmission assembly includes an eccentric wheel, a first sliding member, and a transmission link. 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 connected to one end of the transmission link and can rotate relative to it. The other end of the transmission link is connected to the massage component and can rotate relative to it.

[0007] When using a fascia gun for massage, the reaction force is transmitted to the internal structure through the massage components, causing vibration and noise due to the recoil of the fascia gun. This design effectively reduces vibration and noise, and improves the stability of the massage force.

[0008] In some embodiments, the first sliding member is provided with a transmission shaft, and the first sliding member is connected to one end of the transmission link through the transmission shaft, and the distance between the axis of the transmission shaft and the axis of the first driver output shaft is greater than zero.

[0009] In some embodiments, the massage member is provided with a connecting shaft, and the other end of the transmission link is connected to the connecting shaft of the massage member and can rotate relatively.

[0010] When the transmission shaft rotates with the eccentric wheel, the axis of the transmission shaft rotates around the axis of the first driver output shaft, and the axis of the transmission shaft of the first sliding member also rotates around the axis of the first driver output shaft, the one end of the transmission link is movably connected to the transmission shaft of the first sliding member and can rotate relatively, the other end of the transmission link is connected to the connecting shaft of the massage member and can rotate relatively, the transmission link moves following the transmission shaft, thereby driving the transmission link to move, and further driving the massage member to move transversely.

[0011] In some embodiments, the transmission link is provided with a first transmission ring and a second transmission ring at two ends respectively, the transmission shaft is movably connected to the first transmission ring of the transmission link, and the second transmission ring of the transmission link is connected to the connecting shaft of the massage member and can rotate relatively. In specific embodiments, a connecting bridge is arranged between the first transmission ring and the second transmission ring, and the connecting bridge extends transversely. The connecting bridge is provided with a stepped design to facilitate the installation of internal components.

[0012] In some embodiments, the axis of the transmission shaft of the first sliding member is parallel to the axis of the first driver output shaft, and the axis of the connecting shaft of the massage member is parallel to the axis of the first driver output shaft.

[0013] In some embodiments, a bearing is arranged between the transmission shaft and the first transmission ring, and a bearing is arranged between the connecting shaft and the second transmission ring.

[0014] In some embodiments, the eccentric wheel is provided with a transversely arranged sliding groove, and the first sliding member is arranged in the sliding groove and can move relatively along the sliding groove. The first sliding member can move relatively along the sliding groove to change the position of the first sliding member, and thereby change the distance between the axis of the transmission shaft of the first sliding member and the axis of the first driver output shaft, that is, the stroke of the massage member is changed.

[0015] In some embodiments, the translational trajectory of the axis of the transmission shaft of the first sliding member moving relatively along the sliding groove does not intersect with the axis of the first driver output shaft.

[0016] In some embodiments, the first driver output shaft directly drives the eccentric wheel to rotate, and the eccentric wheel drives the first sliding member to rotate around the output shaft to achieve the beating of the massage member. In other embodiments, the transmission assembly further comprises a second sliding member connected between the first driver output shaft and the first sliding member, and the first driver output shaft, the second sliding member and the first sliding member rotate synchronously.

[0017] In some embodiments, the second sliding member is provided with an assembly foot below, which is inserted into the sliding groove to cooperate with the first sliding member for installation. The cooperative installation can be achieved by special type cooperation or other installation fixtures to make the second sliding member and the first sliding member rotate synchronously.

[0018] In some embodiments, the transmission assembly further comprises a pin, the first sliding member is provided with an inclined slot, the eccentric wheel and the assembly foot are provided with a communicating pin hole, and the pin passes through the inclined slot and the pin hole to make the eccentric wheel, the second sliding member and the first sliding member installed together and rotate synchronously. Meanwhile, the first sliding member and the second sliding member can relatively move along the inclined slot. The inclined direction of the inclined slot intersects with the axis of the first driver output shaft to form an included angle. The relative position change between the first sliding member and the second sliding member along the inclined slot has a transverse component, so that the transverse position of the first sliding member can be adjusted by the movement of the second sliding member.

[0019] In some embodiments, the inclined slot transversely penetrates the first sliding member, and the penetration direction intersects with the opening direction of the sliding groove. Further, the transverse penetration direction of the inclined slot 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.

[0020] In some embodiments, the pin and the pin hole can be designed as a special type cooperation structure to make the synchronous rotation structure of the eccentric wheel, the second sliding member and the first sliding member more stable. For example, the cross section of the pin and the pin hole is rectangular or elliptical or track type, etc.

[0021] In some embodiments, 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 cooperative installation of the first sliding member and the eccentric wheel more stable when the first sliding member moves along the sliding groove.

[0022] In some embodiments, the eccentric wheel extends upwardly with an assembly sleeve, the assembly sleeve has a through hole communicating with the sliding groove, the shape of the through hole is consistent with the cross section shape of the first driver output shaft, and the eccentric wheel is installed on the output shaft through the assembly sleeve.

[0023] In some embodiments, the second sliding member is provided with a mounting hole, the mounting hole is shaped to match the outer profile of the mounting sleeve, the mounting sleeve and the output shaft of the first driver are mounted and pass through the mounting hole, so that the output shaft of the first driver, the second sliding member and the eccentric wheel rotate synchronously.

[0024] In some embodiments, further comprising an adjusting assembly, the adjusting assembly comprises a second driver and a stroke adjuster, the stroke adjuster comprises an adjuster body, the adjuster body is sleeved on the second sliding member and can rotate relative to the second sliding member.

[0025] In some embodiments, the second sliding member is provided with a circumferential positioning flange, the adjuster body is pressed on the positioning flange, so that the second sliding member is fixed relative to the stroke adjuster in the axial direction, and the second sliding member moves synchronously with the stroke adjuster in the axial direction.

[0026] In some embodiments, a bearing is connected between the second sliding member and the stroke adjuster, the outer ring of the bearing is connected with the stroke adjuster, and the inner ring of the bearing is connected with the second sliding member, so that the second sliding member rotates with the eccentric wheel while the adjuster cannot rotate.

[0027] In some embodiments, the stroke adjuster further comprises an extension column fixedly connected with or integrally formed with the adjuster body, the output end of the second driver is provided with an adjusting rod, and the adjusting rod cooperates with the extension column to drive the stroke adjuster to move up and down relative to the adjusting rod in the axial direction.

[0028] In some embodiments, the adjusting rod is provided with external threads, the extension column of the stroke adjuster is provided with matching internal threads, and the driving output of the second driver can drive the stroke adjuster to move up and down in the axial direction through the thread cooperation between the adjusting rod and the extension column. When the stroke adjuster moves up / down in the axial direction, the second sliding member moves up / down (while the second sliding member can rotate with the first sliding member and the eccentric wheel), and when the second sliding member moves up / down, an upward / downward thrust is generated on the plug, and the first sliding member is driven to move through the force received by the inclined slot on the first sliding member, so that the first sliding member approaches / away from the rotation center of the first driver.

[0029] In some embodiments, a protective sleeve and a shock-absorbing soft rubber are provided outside the massage member. Advantages

[0030] The technical scheme of the application solves the problem of insufficient resistance of the first sliding member and the second sliding member to the recoil force caused by the impact of the massage member, solves the problem of piston back-off of the massage member during use, reduces the vibration and noise during movement, increases the recoil resistance, makes the driver run more labor-saving and stable, and prolongs the service life of the internal moving parts. BRIEF DESCRIPTION OF DRAWINGS

[0031] Fig. 1 is an exploded schematic view of the low-noise fascia gun of the application;

[0032] Fig. 2 is a perspective view of the low-noise fascia gun of the application;

[0033] Fig. 3 is another perspective view of the low-noise fascia gun of the application;

[0034] Fig. 4 is a sectional view of the low-noise fascia gun of the application;

[0035] Fig. 5 is a schematic view of the massage member movement state of the first sliding member of the low-noise fascia gun of the application at two different positions;

[0036] Fig. 6 is a schematic view of the movement direction and force direction of the elements of the low-noise fascia gun of the application;

[0037] Fig. 7 is a schematic view of the transmission shaft movement radius comparison of the first sliding member of the low-noise fascia gun of the application at two different positions;

[0038] Fig. 8 is a schematic view of the geometric relationship between the transmission shaft center and the output shaft center of the first sliding member of the low-noise fascia gun of the application at two different positions;

[0039] Fig. 9 is a schematic view of the movement direction and transmission shaft movement radius change relationship of the first sliding member of the low-noise fascia gun of the application;

[0040] Fig. 10 is a structural schematic view of the low-noise fascia gun of the application at the maximum stroke position of the massage member;

[0041] Fig. 11 is a sectional view of the low-noise fascia gun of the application at the maximum stroke position of the massage member;

[0042] Fig. 12 is a structural schematic view of the low-noise fascia gun of the application at the minimum stroke position of the massage member;

[0043] Fig. 13 is a sectional view of the low-noise fascia gun of the application at the minimum stroke position of the massage member. Embodiments of the application

[0044] Exemplary embodiments of the present application will be described more fully hereinafter with reference to the accompanying drawings. While example embodiments of the present application are described herein, the present application can be embodied in various forms without being limited to the example embodiments set forth herein. Rather, these example embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0045] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and the like are to be construed to be inclusive (i.e., to include both instances of open ended terms and instances of terms limiting to a specific number) unless otherwise indicated as otherwise limited by context. The methods described herein can be implemented by one or more computer programs or software modules that operate to perform the methods.

[0046] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0047] For ease of description, spatially relative terms can be used herein for the purpose of illustrating one element's or feature's relationship to another element or feature as shown in the figures. Such spatially relative terms include "internal", "external", "inward", "outward", "stern", "bottom", "top", "under", "above", "front", "back", as well as derivative thereof and other words of similar meaning. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device is inverted, then a component that is described as "below" or "beneath" another component or feature would then be oriented "above" or "over" the other component or feature. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0048] Referring to FIGS. 1-4, the specific embodiment of the low-noise fascia gun of the present application includes a first driver 100, a transmission assembly, a massage piece 910, in this embodiment, the transmission assembly includes an eccentric wheel 200, a first sliding piece 300, a second sliding piece 400, a transmission connecting rod 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 sliding piece 300 is installed together with the eccentric wheel 200 and rotates with the eccentric wheel 200, the second sliding piece 400 is connected between the output shaft 101 of the first driver 100 and the first sliding piece 300, the output shaft of the first driver 100, the eccentric wheel 200, the second sliding piece 400, and the first sliding piece 300 rotate synchronously. The first sliding piece 300 is connected to one end of the transmission connecting rod 500 and can rotate relatively, and the other end of the transmission connecting rod 500 is connected to the massage piece 910 and can rotate relatively. The first driver 100 adopts a driving motor.

[0049] Specifically, the first sliding piece 300 is provided with a transmission shaft 310, the first sliding piece 300 is connected to one end of the transmission connecting rod 500 through the transmission shaft 310, and 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 sliding piece 300 is parallel to the axis of the output shaft of the first driver 100.

[0050] 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, and the transmission shaft 310 of the first sliding piece 300 rotates around the axis of the output shaft of the first driver 100. Since one end of the transmission connecting rod 500 is movably connected with the transmission shaft 310 of the first sliding piece 300 and can rotate relatively, the other end of the transmission connecting rod 500 is connected with the connecting shaft 9101 of the massage piece 910 and can rotate relatively, the transmission connecting rod 500 moves with the transmission shaft 310, thereby driving the movement of the transmission connecting rod 500, and further driving the transverse movement of the massage piece 910, that is, the piston movement of hitting and returning. The maximum difference of the transverse change of the movement of one end of the transmission connecting rod 500 is the hitting stroke of the massage piece 910, that is, twice the distance between the axis of the transmission shaft 310 of the first sliding piece 300 and the axis of the output shaft of the first driver 100.

[0051] Specifically, the massage piece 910 is provided with a connecting shaft 9101, both ends of the transmission connecting rod 500 are respectively provided with a first transmission ring 510 and a second transmission ring 530, the transmission shaft 310 is connected with the first transmission ring 510 of the transmission connecting rod 500 and can rotate relatively, and a bearing 924 is arranged between the transmission shaft 310 and the first transmission ring 510. The second transmission ring 530 of the transmission connecting rod 500 is connected with the connecting shaft 9101 of the massage piece 910 and can rotate relatively, and a bearing 924 is arranged between the connecting shaft 9101 and the second transmission ring 530. The axis of the connecting shaft 9101 of the massage piece 910 is parallel to the axis of the output shaft of the first driver 100. A connecting bridge 520 is arranged between the first transmission ring 510 and the second transmission ring 530, and the connecting bridge 520 extends transversely. The connecting bridge 520 is provided with a stepped design to facilitate the installation of internal components.

[0052] Specifically, the eccentric wheel 200 is provided with a transversely arranged sliding groove 220, and the first sliding piece 300 is arranged in the sliding groove 220. The first sliding piece 300 can move relatively along the sliding groove 220 to change the position of the first sliding piece 300, thereby changing the distance between the axis of the transmission shaft 310 of the first sliding piece 300 and the axis of the output shaft of the first driver 100, that is, changing the hitting stroke of the massage piece 910.

[0053] The eccentric wheel 200 extends upwardly with a fitting sleeve 210, the fitting sleeve 210 has a through hole (not shown) communicating with the sliding groove 220, the shape of the through hole is consistent with the cross-sectional shape of the first driver output shaft 101, the eccentric wheel 200 is installed 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 consistent with the cross-sectional outline 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.

[0054] The second sliding member 400 is provided with a fitting foot 430 below, the fitting 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 realized by special type fitting or other installation fixing members to make the second sliding member 400 and the first sliding member 300 rotate synchronously.

[0055] The transmission assembly further comprises a latch 330, the first sliding member 300 is provided with an inclined groove 320, the eccentric wheel 200 and the fitting foot 430 are provided with a communicating pin hole 230, the latch 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 relatively move 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 included angle, the relative motion between the first sliding member 300 and the second sliding member 400 along the inclined groove 320 changes the relative position between the first sliding member 300 and the second sliding member 400, so that the transverse position of the first sliding member 300 can be adjusted by the motion of the second sliding member 400.

[0056] 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 latch 330 is inserted along the direction perpendicular to the opening direction of the sliding groove 220.

[0057] The latch 330 and the pin hole 230 can be designed as a special type 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 latch 330 and the pin hole 230 is rectangular or elliptical or track type, etc.

[0058] The first sliding member 300 is provided with a positioning protrusion 340 extending along the direction of the sliding groove 220, and the eccentric wheel 200 is provided with a matching positioning hole 240, the positioning protrusion 340 is inserted into the positioning hole 240, so that the first sliding member 300 is more stably installed in cooperation with the eccentric wheel 200 when moving along the sliding groove 220.

[0059] The fascia gun further comprises an adjusting assembly, the adjusting assembly comprising a second driver 600 and a stroke adjuster 700, the stroke adjuster 700 comprising an adjuster body 720, the adjuster body 720 being sleeved on the second sliding member 400 and being rotatable relative to the second sliding member 400. Specifically, a bearing 924 is connected between the second sliding member 400 and the stroke adjuster 700, the outer ring of the bearing 924 being connected with the stroke adjuster 700, and the inner ring of the bearing 924 being connected with the second sliding member 400, so that the second sliding member 400 rotates together with the eccentric wheel 200, and the adjuster cannot rotate. The second sliding member 400 is provided with a circumferential positioning flange 420, and the adjuster body 720 is pressed on the positioning flange 420, so that the second sliding member 400 is fixed relative to the stroke adjuster 700 in the axial direction, and the second sliding member 400 moves synchronously with the stroke adjuster 700 in the axial direction.

[0060] The stroke adjuster 700 further comprises an extension column 720 fixedly connected with or integrally formed with the adjuster body 720, and the output end of the second driver 600 is provided with an adjusting rod 610, the adjusting rod 610 being matched with the extension column 720 to enable the stroke adjuster 700 to move up and down relative to the adjusting rod 610 in the axial direction. Specifically, the adjusting rod 610 is provided with external threads, and the extension column 720 of the stroke adjuster 700 is provided with matching internal threads, so that the driving output of the second driver 600 can drive the stroke adjuster 700 to move up and down in the axial direction through the thread cooperation between the adjusting rod 610 and the extension column 720. When the stroke adjuster 700 moves up / down in the axial direction, the second sliding member 400 is driven to move up / down (while the second sliding member 400 can rotate together with the first sliding member 300 and the eccentric wheel 200), and when the second sliding member 400 moves up / down, an upward / downward thrust is generated on the bolt 330, the first sliding member 300 is driven to move through the force received by the inclined slot 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.

[0061] Please refer to Figs. 5-13, in particular, the translation trajectory of the transmission shaft 310 of the first sliding member 300 along the sliding groove 220 relative movement is not intersected with the axis of the output shaft of the first driver 100, that is, the axis of the transmission shaft 310 of the first sliding member 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 sliding member 300. As shown in Figs. 5a and 5b, the first sliding member 300 in two different positions of the massage member movement state comparison diagram, O3 in Fig. 5a and O2 in Fig. 5b are the translation trajectory of the transmission shaft 310 of the first sliding member 300 along the sliding groove 220 relative movement, O1 is a reference line passing through the axis of the output shaft of the first driver 100 and parallel to the translation trajectory O2, O3, it can be seen that the translation trajectory is not intersected with the axis of the output shaft of the first driver 100, the axis of the transmission shaft 310 of the first sliding member 300 makes a circular motion around the axis of the output shaft 101 of the first driver 100, and after the first sliding member 300 adjusts the position along the sliding groove 220, the radius of the circular motion changes. The E line position shown in Fig. 6 is the assembly groove position of the first sliding member 300 installed on the eccentric wheel 200, the force acting on the E line when the massage member 910 retreats increases the recoil force resistance, the x direction in the figure is the hitting direction of the massage member 910, the y direction is the activity direction of the first sliding member 300, because the force when the massage member 910 retreats and the force in the activity direction of the first sliding member 300 are not on the same axis, but there is a certain angle, so the massage member 910 will not force the first sliding member 300 to slide synchronously when it retreats.

[0062] The line connecting the axis of the transmission shaft 310 of the first sliding member 300 and the axis of the output shaft of the first driver 100, the translational trajectory line of the axis of the transmission shaft 310 along the sliding groove 220, the perpendicular line from the axis of the output shaft of the first driver 100 to the translational trajectory line, when the axis of the transmission shaft 310 and the intersection of the perpendicular line and the translational trajectory line do not coincide, the three lines intersect to form a right triangle, the hypotenuse of the right triangle is the distance from the axis of the transmission shaft 310 to the axis of the output shaft, as the transmission shaft 310 of the first sliding member 300 moves along the sliding groove 220, the right triangle changes, the distance from the axis of the transmission shaft 310 to the axis of the output shaft also changes, that is, the hitting stroke of the massage member 910 changes. When the distance from the axis of the transmission shaft 310 to the axis of the output shaft is the largest, the rotational radius of the axis of the transmission shaft 310 around the axis of the output shaft is the largest, that is, the maximum adjustable hitting stroke of the massage member 910. When the axis of the transmission shaft 310 and the intersection of the perpendicular line and the translational trajectory line coincide, the distance from the axis of the transmission shaft 310 to the axis of the output shaft is the smallest, the rotational radius of the axis of the transmission shaft 310 around the axis of the output shaft is the smallest, that is, the hitting stroke of the massage member 910 is the smallest.

[0063] Please refer to Figs. 7~13, Fig. 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 sliding member 300 is in two different positions, wherein 7a shows that when the first sliding member 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 sliding member 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. Herein, the "upper" and "lower" are only for the convenience of description and are relative to the figure shown in Fig. 7, and do not limit the present application. Fig. 8 is a schematic diagram of the geometric relationship between the axis of the transmission shaft and the axis of the output shaft when the first sliding member 300 is in two different positions, and Fig. 9 is a schematic diagram of the relationship between the movement direction of the first sliding member 300 and the change of the radius of the transmission shaft, wherein A is the rotation center of the output shaft 101 of the first driver 100, C is the center of the transmission shaft 310 of the first sliding member 300 (connected with the connecting end of the massage member 910 through the transmission connecting rod 500), b is the translation trajectory line of the axis of the transmission shaft 310 along the sliding groove 220, a is the perpendicular line from the center of the output shaft of the first driver 100 to the translation trajectory line, B is the intersection of the perpendicular line and the translation trajectory line, and the length of c is the size of the rotation radius of the transmission shaft 310 of the first sliding member 300. By adjusting the position of C, the distance between C and A is changed by moving C along the b side of the triangle in the figure, so as to change the size of the rotation radius of the transmission shaft 310 of the first sliding member 300. When the first sliding member 300 is slid along the sliding groove 220 to coincide with B, the distance d3 between A and B is the size of the rotation radius of the transmission shaft 310 of the first sliding member 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 sliding member 300 is at this position, as shown in Fig. 8b. As shown in Fig. 9b, the first sliding member 300 is slid along the sliding groove 220, and the axis of the transmission shaft is slid from the coinciding position of B, such as to C2, the distance between the center of the transmission shaft 310 of the first sliding member 300 and 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 Fig. 9a, when the first sliding member 300 is slid along the sliding groove 220 to the position C1 farthest from the output shaft 101, the distance between the center of the transmission shaft 310 of the first sliding member 300 and the rotation center A of the output shaft 101 of the first driver 100 is d1, the stroke of the massage member 910 is related to d1, and the stroke of the massage member 910 is the largest, as shown in Figs. 8a and 9a.

[0064] Please refer to FIG. 10-13, the output end adjusting rod 610 of the second driver 600 drives the stroke adjuster 700 to move up and down along the axial direction, thereby driving the second sliding member 400 to move up and down, and generating an upward / downward thrust on the latch 330. The first sliding member 300 is driven to move by the force on the inclined slot 320 of the first sliding member 300, thereby adjusting the distance between the axis of the transmission shaft 310 of the first sliding member 300 and the rotation center of the first driver 100, and achieving the stroke adjustment of the massage member 910. As shown in FIG. 10 and 11, when the latch 330 slides to the lowermost position of the inclined slot, and the first sliding member 300 slides to the position where the distance between the axis of the transmission shaft 310 and the axis of the output shaft 101 is the largest, the stroke of the massage member 910 is the largest. As shown in FIG. 12 and 13, when the latch 330 slides to the uppermost position of the inclined slot, and the first sliding member 300 slides to the position where the distance between the axis of the transmission shaft 310 and the axis of the output shaft 101 is the smallest, the stroke of the massage member 910 is the smallest. Here, the "upper" and "lower" are only for the convenience of description and are relative to the display in the drawings, and do not limit the present application. For example, in other embodiments, the direction of the inclined slot can be changed, and the relationship between the sliding direction of the latch 330 and the distance between the axis of the transmission shaft 310 and the axis of the output shaft 101 is different.

[0065] In the present application, the translational trajectory line of the first sliding member 300 along the sliding slot 220 does not intersect with the axis of the output shaft of the first driver 100, the axis of the transmission shaft 310 of the first sliding member 300 has a triangular relationship with the axis of the output shaft of the first driver 100 during stroke adjustment, and the direction of the piston movement (striking / returning) of the massage member 910 has a certain angle with the translational trajectory line of the first sliding member 300. The recoil force generated during striking can be resisted by the side of the sliding slot 220, and the vibration and noise caused by the recoil force of the first sliding member 300 can be eliminated. The present application can effectively reduce the vibration and noise and improve the stability of the striking force.

[0066] The present application solves the problem of insufficient recoil resistance of the first sliding member 300 and the second sliding member 400 caused by the counterforce during the striking of the massage member 910, solves the piston returning phenomenon of the massage member 910 during use, reduces the vibration and noise during movement, increases the recoil resistance, makes the driver run more labor-saving and stable, and prolongs the service life of the internal moving parts.

[0067] In some other embodiments, the transmission assembly comprises an eccentric wheel 200, a first sliding member 300, a transmission connecting rod 500, the first sliding member 300 is directly connected to the output shaft of the first driver 100 and rotates synchronously with the output shaft, and the transmission shaft 310 of the first sliding member 300 is arranged away from the center of the output shaft of the first driver 100.

[0068] In specific embodiments, a protective sleeve 911 and a shock-absorbing soft rubber 912 are arranged outside the massage member 910, and a shock-absorbing pad 102 is arranged below the first motor 100. The fascia gun further comprises a first housing 921, a second housing 922, a third housing 923, a first support 931, a second support 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 into an outer shell, the first driver 100, the transmission assembly, the massage member 910, the adjustment assembly, the first support 931, the second support 932, the battery 941, and the circuit board 942 are arranged in the outer shell, the first support 931 and the second support 932 are assembled together and used for mounting and positioning 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, and the button 943 is used for operation control. The battery 941 can be a primary battery or a secondary battery, or the battery can not be installed and power supply can be achieved by connecting to a mains electricity.

[0069] The above description is 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 solutions of the present application is 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, a massage member, the transmission assembly includes an eccentric wheel, a first sliding member, a transmission connecting rod, the first driver output shaft is connected with the eccentric wheel to drive the eccentric wheel to rotate, the first sliding member is installed with the eccentric wheel and rotates with the eccentric wheel, the first sliding member is connected with one end of the transmission connecting rod and can relatively rotate, the other end of the transmission connecting rod is connected with the massage member and can relatively rotate.

2. The low-noise fascia broach of claim 1, wherein, The first sliding member is provided with a transmission shaft, the first sliding member is connected with one end of the transmission connecting rod through the transmission shaft, and the distance between the axis of the transmission shaft and the axis of the driver output shaft is greater than zero.

3. The low noise fascia broach of claim 2, wherein, The massage member is provided with a connecting shaft, and the other end of the transmission connecting rod is connected with the connecting shaft of the massage member and can relatively rotate.

4. The low noise fascia broach of claim 3, wherein, The transmission connecting rod is provided with a first transmission ring and a second transmission ring at two ends respectively, the transmission shaft is connected with the first transmission ring of the transmission connecting rod and can relatively rotate, and the second transmission ring of the transmission connecting rod is connected with the connecting shaft of the massage member and can relatively rotate.

5. The low noise fascia broach of claim 4, wherein, Bearings are arranged between the transmission shaft and the first transmission ring, and between the connecting shaft and the second transmission ring.

6. The low-noise fascia broach of any one of claims 1-5, wherein, The eccentric wheel is provided with a transversely arranged sliding groove, the first sliding member is arranged in the sliding groove, and the first sliding member can relatively move along the sliding groove.

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

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

9. The low-noise fascia broach of claim 8, wherein, A mounting foot is arranged below the second sliding member, the mounting foot is inserted into the sliding groove and is mounted in cooperation with the first sliding member.

10. The low-noise fascia broach of claim 9, wherein, The transmission assembly further includes a latch, an inclined slot is arranged on the first sliding member, the eccentric wheel and the mounting foot are provided with communicating pin holes, the latch passes through the inclined slot and the pin holes, so that the eccentric wheel, the second sliding member and the first sliding member are mounted together and rotate synchronously, meanwhile, the first sliding member and the second sliding member can relatively move along the inclined slot, and the inclined direction of the inclined slot intersects with the axis of the first driver output shaft to form an included angle.

11. The low-noise fascia broach of claim 10, wherein, The inclined slot transversely penetrates the first sliding member, and the penetration direction intersects with the opening direction of the sliding groove.

12. The low-noise fascia broach of any one of claims 1-5, wherein, A positioning protrusion extending along the direction of the sliding groove is arranged on the first sliding member, the eccentric wheel is provided with a matched positioning hole, the positioning protrusion is inserted into the positioning hole, so that the cooperation between the first sliding member and the eccentric wheel during the movement of the first sliding member along the sliding groove is more stable.

13. The low-noise fascia broach of claim 8, wherein, The eccentric wheel extends upwardly with a mounting sleeve, the mounting sleeve has a through hole communicating with the sliding groove, the shape of the through hole is consistent with the cross-sectional shape of the first driver output shaft, and the eccentric wheel is mounted on the output shaft through the mounting sleeve.

14. The low-noise fascia broach of claim 13, wherein, The second sliding member is provided with an assembly hole, the assembly hole is matched with the outer profile of the assembly sleeve section, the assembly sleeve and the output shaft of the first driver are matched 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 broach of claim 8, wherein, Further comprising an adjusting assembly, the adjusting assembly comprises a second driver and a stroke adjuster, the stroke adjuster comprises an adjuster body, the adjuster body is sleeved on the second sliding member and can rotate relatively.

16. The low-noise fascia broach of claim 15, wherein, The second sliding member is provided with a circumferential positioning flange, the adjuster body is pressed on the positioning flange, so that the second sliding member and the stroke adjuster are fixed relatively in the axial direction and the second sliding member moves synchronously with the stroke adjuster in the axial direction.

17. The low-noise fascia broach of claim 16, wherein, A connecting bearing is arranged between the second sliding member and the stroke adjuster.

18. The low-noise fascia broach of claim 15, wherein, The stroke adjuster further comprises an extension column fixedly connected with the adjuster body or integrally formed, the output end of the second driver is provided with an adjusting rod, the adjusting rod is matched with the extension column, so that the stroke adjuster moves up and down in the axial direction relative to the adjusting rod.

19. The low-noise fascia broach of claim 18, wherein, The adjusting rod is provided with external threads, the extension column of the stroke adjuster is provided with matched internal threads, the driving output of the second driver can drive the stroke adjuster to move up and down in the axial direction through the thread matching between the adjusting rod and the extension column.

20. The low-noise fascia broach of any one of claims 1-5, wherein, A protective sleeve and a shock absorbing soft rubber are arranged outside the massage member.

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