Knocking transmission mechanism for massager

Abstract

A knocking transmission mechanism for a massager. A relatively thin eccentric shaft (11) is provided at one end of a transmission shaft (1); a hinge base (21) of a transmission hinge (2) is sleeved on the eccentric shaft (11), and the hinge base (21) can rotate relative to the eccentric shaft (11); and when the eccentric shaft (11) performs an eccentric rotation, the hinge base (21) swings in a reciprocating manner relative to the transmission shaft (1) to drive a swing arm (22) of the transmission hinge (2) to swing, so as to drive a massage member (5) to perform a knocking action. The knocking transmission mechanism uses the eccentric shaft (11) that is thinner than the transmission shaft (1) as an eccentric driving member, which does not occupy extra space in a circumferential direction, and the hinge base (21) is sleeved on the eccentric shaft (11) and is driven by the eccentric shaft (11) to swing rather than being subjected to transmission around the transmission shaft (1), such that the range of motion is small, the transmission is stable, and the required space for motion is small; and the structure is simple and compact, the mounting is facilitated, and the product performance is improved.

Description

A percussion transmission mechanism for a massager

[0001] This application claims priority to Chinese patent application No. 202322636944.5 filed on September 27, 2023, and all disclosed contents of that application are incorporated herein by reference. Technical Field

[0002] The present application relates to the technical field of massagers, and in particular to a percussion transmission mechanism for massagers. Background Art

[0003] The portable massager is equipped with a massage element, which includes a connecting arm and a massage head mounted at the end of the connecting arm. The connecting arm is connected to a drive transmission mechanism in the massager, and the connecting arm drives the massage head to swing or rotate, and the massage head follows the movement, thereby providing a massage to the user.

[0004] In order to enhance the massage effect, a percussion transmission device is also provided in the massager to drive the kneading connecting arm to vibrate back and forth in a specific direction, and the massage head can realize percussion massage.

[0005] Conventional percussion transmission devices include a rotating shaft, a cam, and a hinge. The cam is fixedly mounted on the rotating shaft. An axially extending pivot shaft is provided on the protruding portion of the cam. One end of the hinge is hinged to the pivot shaft, and the other end of the hinge is hinged to the connecting arm. The rotating shaft is in transmission connection with the drive mechanism in the massager. The rotating shaft rotates the cam, which in turn rotates the hinge and reciprocates, thereby driving the connecting arm to vibrate back and forth along its rotation direction. The massage head performs a percussive action, providing the user with a percussive massage.

[0006] The above solutions in the prior art have the following defects:

[0007] The cam is mounted on a rotating shaft, requiring ample room for rotation, which occupies a large space. One end of the hinge rotates with the pivot shaft on the cam, resulting in a large range of motion and unstable transmission. The large space required also requires avoiding interference between the rotating hinge and the rotating shaft, making the structure complex.

[0008] In view of this, it is necessary to provide a percussion transmission mechanism for a massager that has a simple and compact structure, occupies a small space, and has stable transmission.

[0009] Summary of the Invention

[0010] The purpose of this application is to overcome the deficiencies of the prior art and to provide a percussion transmission mechanism for a massager that is simple in structure, compact, occupies little space, and has stable transmission.

[0011] The technical solution of the present application provides a percussion transmission mechanism for a massager, comprising a transmission shaft and a transmission hinge for connecting to a massage element;

[0012] An eccentric shaft is provided at one end of the transmission shaft, and the radius of the eccentric shaft is smaller than the radius of the transmission shaft;

[0013] The transmission hinge includes a hinge seat pivotally mounted on the eccentric shaft and a swing arm hinged to the hinge seat. The swing arm extends toward one side of the eccentric shaft, and the end of the swing arm has a ball head for hinged connection with the massage part.

[0014] In one of the optional technical solutions, the radius of the eccentric shaft is r, the radius of the transmission shaft is R, and the center distance between the eccentric shaft and the transmission shaft is D, wherein D<Rr<6mm, and r≥2mm.

[0015] In one of the optional technical solutions, the knocking transmission mechanism includes two sets of transmission hinges, and the two sets of transmission hinges are assembled at both ends of the transmission shaft;

[0016] An eccentric shaft is respectively provided at both ends of the transmission shaft, and the hinge seats of the two sets of transmission hinges are respectively pivotally connected to the two eccentric shafts.

[0017] In one of the optional technical solutions, the axes of the two eccentric shafts are located on opposite sides of the axis of the transmission shaft.

[0018] In one of the optional technical solutions, the hinge seat is mounted on the eccentric shaft via a support bearing.

[0019] In one of the optional technical solutions, the support bearing is sleeved on the eccentric shaft, one side of the inner ring of the support bearing abuts against the abutment surface between the eccentric shaft and the transmission shaft, and a chamfered surface is formed on the side of the abutment surface that deviates from the axis of the eccentric shaft.

[0020] In one of the optional technical solutions, the hinge seat includes a hinge seat sleeve, and the support bearing is fitted in the hinge seat sleeve;

[0021] A barrel opening retaining ring is integrally provided in the barrel opening of one end of the hinge seat sleeve, and a barrel opening end cover is connected to the barrel opening of the other end of the hinge seat sleeve, and the support bearing is located between the barrel opening retaining ring and the barrel opening end cover;

[0022] Two sleeve ear plates are spaced apart on one side of the hinge seat sleeve, and one end of the swing arm is hinged between the two sleeve ear plates.

[0023] In one of the optional technical solutions, the transmission shaft is equipped with a transmission wheel for transmission connection with the driving mechanism.

[0024] In one of the optional technical solutions, a one-way bearing is installed between the transmission wheel and the transmission shaft.

[0025] In one of the optional technical solutions, a transmission sleeve is provided on one side of the transmission wheel, the transmission sleeve is coaxially arranged with the transmission wheel, and the one-way bearing is installed in the transmission sleeve.

[0026] In one of the optional technical solutions, a rotating bearing is installed in the center hole of the transmission wheel, the rotating bearing is located on one side of the one-way bearing, and the rotating bearing is coaxially arranged with the one-way bearing.

[0027] The above technical solution has the following beneficial effects:

[0028] The percussion transmission mechanism for a massager provided in the present application has a thinner eccentric shaft provided at one end of the transmission shaft, and the hinge seat of the transmission hinge is sleeved on the eccentric shaft. The hinge seat can rotate relative to the eccentric shaft. When the eccentric shaft rotates eccentrically, the hinge seat swings back and forth relative to the transmission shaft, thereby driving the swing arm of the transmission hinge to swing as well, so as to drive the massage part to perform a percussive action.

[0029] In this application, an eccentric shaft that is thinner than the transmission shaft is used as an eccentric driving component, which does not occupy additional space in the circumferential direction. The hinge seat is sleeved on the eccentric shaft and is driven to swing by the eccentric shaft instead of being driven around the transmission shaft. Its range of motion is small, the transmission is stable, the required space for motion is small, the structure is simple and compact, and it is easy to install, thereby improving the performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The disclosure of this application will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. In the drawings:

[0031] FIG1 is a perspective view of a knocking transmission mechanism provided in one embodiment of the present application;

[0032] FIG2 is a cross-sectional view of a knock transmission mechanism along a transmission axis according to an embodiment of the present application;

[0033] FIG3 is an exploded view of a knocking transmission mechanism provided in one embodiment of the present application;

[0034] FIG4 is a cross-sectional view of the transmission shaft;

[0035] FIG5 is an exploded view of the transmission hinge;

[0036] FIG6 is an exploded view of the transmission wheel;

[0037] FIG7 is a cross-sectional view of the transmission wheel;

[0038] FIG8 is a schematic diagram showing the connection between the knocking transmission mechanism and the massage element. DETAILED DESCRIPTION

[0039] The following further describes the specific embodiments of the present application with reference to the accompanying drawings. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0040] As shown in Figures 1-3 and Figure 8, an embodiment of the present application provides a percussion transmission mechanism for a massager, including a transmission shaft 1 and a transmission hinge 2 for connecting to a massage member 5.

[0041] An eccentric shaft 11 is provided at one end of the transmission shaft 1 , and the radius of the eccentric shaft 11 is smaller than the radius of the transmission shaft 1 .

[0042] The transmission hinge 2 includes a hinge seat 21 pivotally mounted on the eccentric shaft 11 and a swing arm 22 hinged to the hinge seat 21. The swing arm 22 extends toward one side of the eccentric shaft 11. The end of the swing arm 22 has a ball head 221 for hinged connection with the massage part 5.

[0043] The hinged connection, pivotable connection, etc. mentioned in this application means that two parts can move relative to each other to achieve actions such as swinging and rotating. The two parts can be connected by a rotating shaft or a hinge.

[0044] The percussion transmission mechanism provided in the present application is used in a massager to drive the massage member 5 to perform percussion massage. The massager can be an ordinary massager or a shoulder and neck massager, etc. The massage member 5 generally includes a movable arm 51, a massage head 52 connected to one end of the movable arm 51, and a mounting portion 53 connected to the other end of the movable arm 51. The mounting portion 53 is connected to the drive transmission mechanism in the massager to drive the movable arm 51 to rotate and / or swing, thereby driving the massage head 52 to move to achieve the corresponding massage action. The percussion transmission mechanism is hinged to the movable arm 51 and / or the mounting portion 53, and is used to drive the movable arm 51 to vibrate back and forth along its pivot center, thereby driving the massage head 52 to vibrate and achieve percussion massage.

[0045] The knocking transmission mechanism includes a transmission shaft 1 and at least one set of transmission hinges 2. At least one end of the transmission shaft 1 has an eccentric shaft 11, and one end of the transmission hinge 2 is assembled with the eccentric shaft 11.

[0046] The eccentric shaft 11 is eccentrically positioned at the end of the transmission shaft 1. Specifically, the axis of the eccentric shaft 11 is offset to one side of the axis of the transmission shaft 1. The eccentric shaft 11 is thinner than the transmission shaft 1. Its profile does not protrude circumferentially from the transmission shaft 1, thus occupying no additional circumferential rotational space. Compared to conventional cam-based structures, the arrangement of the eccentric shaft 11 at the end of the transmission shaft 1 in this application utilizes less space and is more compact.

[0047] The transmission hinge 2 includes a hinge base 21 and a swing arm 22. The hinge base 21 fits over the eccentric shaft 11, and the two cooperate. When the eccentric shaft 11 rotates, the hinge base 21 is driven to swing or vibrate by the eccentric shaft 11. The radial distance between the axis of the eccentric shaft 11 and the axis of the transmission shaft 1 is D. The amplitude of the swing or vibration of the hinge base 21 is between D and 2D, and the hinge base 21 does not rotate with the eccentric shaft 11. The swing arm 22 is located on one side of the eccentric shaft 11 or the transmission shaft 1. One end of the swing arm 22 is hinged to the hinge base 21, allowing it to move relative to the hinge base 21. The other end of the swing arm 22 has a ball head 221, which is used to articulate with the massage element 5. Specifically, the ball head 221 can be hinged to the movable arm 51 or the mounting portion 53 to drive the movable arm 51 to vibrate. A ball socket 54 can be provided on the movable arm 51 or the mounting portion 53 to assemble with the ball head 221.

[0048] Compared to conventional cam-based structures, the hinge base 21 of the present invention has a relatively small range of motion, requires a relatively small space for movement, occupies less space, and has a more compact structure. The hinge base 21 is mounted on a thinner eccentric shaft 11, shortening the distance between the ball head 221 and the transmission shaft 1, facilitating a more compact structural layout. The hinge base 21 does not need to rotate; it only swings or vibrates, making it easier to control the movement of the swing arm 22 to drive the vibration of the massage element 5. This provides more stable movement of the swing arm 22 and a better transmission effect.

[0049] In one embodiment, as shown in FIG4 , the radius of the eccentric shaft 11 is r, the radius of the transmission shaft 1 is R, and the center distance between the eccentric shaft 11 and the transmission shaft 1 is D, wherein D<Rr<6mm, and r≥2mm.

[0050] A contact surface 12 must be left between the eccentric shaft 11 and the transmission shaft 1 for the assembly surface of the hinge seat 21, the assembly surface of the bushing, or the inner ring of the support bearing 23 mentioned later to abut and install. To ensure smooth installation, the annular assembly surface or the entire inner ring of the support bearing 23 must abut against the contact surface 12. Therefore, the minimum position of the outer diameter of the eccentric shaft 11 and the outer diameter of the transmission shaft 1 cannot be zero, nor can it be infinitely close to zero. Setting D < Rr ensures that the outer circumference of the eccentric shaft 11 is on the inner side of the outer circumference of the transmission shaft 1, thereby forming a complete and continuous contact surface 12 between the two, meeting assembly requirements.

[0051] In addition, the percussion transmission mechanism provided by this application utilizes the eccentric distance D between the eccentric shaft 11 and the transmission shaft 1 to form eccentric rotation to produce the percussion action. Considering that the movement is mainly used in portable massage products, the movement needs to be miniaturized. While ensuring the strength of the eccentric shaft 11, r ≥ 2mm, and the eccentric distance D should not be too large. If the eccentric distance D is too large, the transmission chain and corresponding components of the entire percussion transmission mechanism will have to be increased in size, which is not conducive to the miniaturization design of the movement. Therefore, Rr is set to < 6mm.

[0052] In one embodiment, as shown in FIG. 1-3 , the knocking transmission mechanism includes two sets of transmission hinges 2 , which are assembled at both ends of the transmission shaft 1 .

[0053] An eccentric shaft 11 is respectively provided at both ends of the transmission shaft 1 , and the hinge seats 21 of the two sets of transmission hinges 2 are pivotally connected to the two eccentric shafts 11 .

[0054] In this embodiment, the percussion transmission mechanism is equipped with two sets of transmission hinges 2 to accommodate two massage members 5. Accordingly, an eccentric shaft 11 is provided at each end of the transmission shaft 1, and the hinge seat 21 of each set of transmission hinges 2 is correspondingly assembled on an eccentric shaft 11.

[0055] In one embodiment, as shown in Figures 2 and 4, the axes of the two eccentric shafts 11 are on opposite sides of the axis of the transmission shaft 1, so that the swinging or vibration directions of the two sets of transmission hinges 2 are roughly opposite, and the movements of the two sets of transmission hinges 2 are not synchronized. Therefore, the movements of the two sets of massage parts 5 are also not synchronized, which expands the massage method and adapts to the different massage needs of users.

[0056] In one embodiment, the eccentric shaft 11 and the transmission shaft 1 are integrally formed, which is convenient for processing and forming and has high structural strength.

[0057] In one embodiment, as shown in FIG. 2 , the hinge base 21 is mounted on the eccentric shaft 11 via a support bearing 23 .

[0058] In this embodiment, a support bearing 23 is disposed in the hinge seat 21, and the support bearing 23 is sleeved on the eccentric shaft 11. Therefore, when the hinge seat 21 swings or vibrates, it will not directly touch the eccentric shaft 11, thereby avoiding wear on the eccentric shaft 11 and playing a protective role.

[0059] In one embodiment, as shown in Figures 2 and 4, the support bearing 23 is sleeved on the eccentric shaft 11, and one side of the inner ring of the support bearing 23 abuts against the abutment surface 12 between the eccentric shaft 11 and the transmission shaft 1. The abutment surface 12 is formed with a chamfered surface 121 on the side deviating from the axis of the eccentric shaft 11.

[0060] In this embodiment, a contact surface 12 is formed on one end face of the eccentric shaft 11 where it is connected to the transmission shaft 1. The contact surface 12 is roughly an irregular ring. A chamfered surface 121 is formed on the side of the contact surface 12 that deviates from the eccentric shaft 11. The contact surface 12 only contacts the inner ring of the support bearing 23 to avoid contact and friction with other positions of the support bearing 23, which may cause bearing wear or failure.

[0061] In one embodiment, as shown in FIG. 3 and FIG. 5 , the hinge seat 21 includes a hinge seat sleeve 211 , and the support bearing 23 is fitted in the hinge seat sleeve 211 .

[0062] A tube mouth retaining ring 212 is integrally provided in the tube mouth of one end of the hinge seat sleeve 211 , and a tube mouth end cover 213 is connected to the tube mouth of the other end of the hinge seat sleeve 211 , and the support bearing 23 is located between the tube mouth retaining ring 212 and the tube mouth end cover 213 .

[0063] Two sleeve ear plates 214 are spaced apart on one side of the hinge seat sleeve 211 , and one end of the swing arm 22 is hinged between the two sleeve ear plates 214 .

[0064] In this embodiment, the hinge seat 21 includes a hinge seat sleeve 211 , a barrel mouth retaining ring 212 , a barrel mouth end cover 213 and two sleeve ear plates 214 .

[0065] A barrel stop ring 212 is integrally mounted within the barrel opening of one end of the hinge base sleeve 211. A barrel end cap 213 is removably connected to the other end of the hinge base sleeve 211 via a connector. The barrel end cap 213 and barrel stop ring 212 are used to limit the axial position of the support bearing 23. To assemble the support bearing 23, open the barrel end cap 213, place the support bearing 23 into the hinge base sleeve 211, and then replace the barrel end cap 213. This completes the installation of the support bearing 23.

[0066] Two sleeve lugs 214 are connected to the side of the hinge base sleeve 211 facing away from the eccentric shaft 11. The end of the swing arm 22 that connects to the hinge base sleeve 211 has a flat portion 222. The flat portion 222 is loosely fitted between the two sleeve lugs 214. The two sleeve lugs 214 and the flat portion 222 are connected by a rotating shaft. Therefore, when the hinge base 21 swings or vibrates, the swing arm 22 can swing relative to the hinge base 21, adaptively adjusting to changes in the distance between the ball head 221 and the transmission shaft 1.

[0067] In one embodiment, as shown in Figures 1-3, a transmission wheel 3 is mounted on a transmission shaft 1 for transmission connection with a drive mechanism. Transmission wheel 3 is configured to be in transmission connection with the drive mechanism in the massager to drive transmission shaft 1 to rotate. Transmission wheel 3 has a large diameter, providing a deceleration effect during transmission.

[0068] In one embodiment, as shown in FIG. 2 and FIG. 6 - 7 , a one-way bearing 32 is installed between the transmission wheel 3 and the transmission shaft 1 to meet the needs of switching different massage modes of the massage member 5 .

[0069] When the transmission wheel 3 is driven to rotate in the forward direction, the one-way bearing 32 is turned on or takes effect, and the one-way bearing 32 transmits torque to the transmission shaft 1, thereby driving the transmission shaft 1 to rotate in the forward direction, so as to drive the massage part 5 to perform percussion massage through the transmission hinge 2.

[0070] When the transmission wheel 3 is driven to rotate in the reverse direction, the one-way bearing 32 is not conductive or does not function, and does not transmit torque to the transmission shaft 1. The transmission hinge 2 does not move and does not drive the massage part 5 to perform tapping and massage.

[0071] In one embodiment, as shown in FIG. 2 and FIG. 6 - 7 , a transmission sleeve 31 is provided on one side of the transmission wheel 3 . The transmission sleeve 31 is coaxially arranged with the transmission wheel 3 , and a one-way bearing 32 is installed in the transmission sleeve 31 .

[0072] In this embodiment, a coaxially arranged transmission sleeve 31 is integrally provided on one side of the transmission wheel 3 for mounting a one-way bearing 32 . The length of the one-way bearing 32 is not limited by the axial size of the transmission wheel 3 .

[0073] In one embodiment, as shown in FIG. 2 and FIG. 6 - 7 , a rotating bearing 33 is installed in the center hole of the transmission wheel 3 . The rotating bearing 33 is located on one side of the one-way bearing 32 , and the rotating bearing 33 and the one-way bearing 32 are coaxially arranged.

[0074] In this embodiment, the transmission shaft 1 passes through the rotating bearing 33 and the one-way bearing 32. The rotating bearing 33 and the one-way bearing 32 support the transmission wheel 3 and the transmission sleeve 31 respectively, which is beneficial to improving the stability of the transmission wheel 3, the transmission sleeve 31 and the transmission shaft 1.

[0075] In one embodiment, as shown in FIG. 1-3 , a plurality of rolling bearings 4 are disposed on the transmission shaft 1 to be assembled with the housing of the massager.

[0076] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0077] The above are only the principles and preferred embodiments of the present application. It should be noted that, for those skilled in the art, on the basis of the principles of the present application, several other modifications can be made, which should also be considered as the scope of protection of the present application.

Claims

1. A percussion transmission mechanism for a massager, characterized in that: It comprises a transmission shaft (1) and a transmission hinge (2) for connecting with a massage element (5); An eccentric shaft (11) is provided at one end of the transmission shaft (1), and the radius of the eccentric shaft (11) is smaller than the radius of the transmission shaft (1); The transmission hinge (2) comprises a hinge seat (21) pivotally sleeved on the eccentric shaft (11) and a swing arm (22) hinged to the hinge seat (21); the swing arm (22) extends toward one side of the eccentric shaft (11); and the end of the swing arm (22) has a ball head (221) for being hinged to the massage element (5).

2. The percussion transmission mechanism for a massager according to claim 1, characterized in that: The radius of the eccentric shaft (11) is r, the radius of the transmission shaft (1) is R, and the axial center distance between the eccentric shaft (11) and the transmission shaft (1) is D, wherein D<Rr<6mm, and r≥2mm.

3. The percussion transmission mechanism for a massager according to claim 1, characterized in that: The knocking transmission mechanism comprises two sets of transmission hinges (2), and the two sets of transmission hinges (2) are assembled at both ends of the transmission shaft (1); An eccentric shaft (11) is respectively provided at both ends of the transmission shaft (1), and the hinge seats (21) of the two sets of transmission hinges (2) are respectively pivotally connected to the two eccentric shafts (11).

4. The percussion transmission mechanism for a massager according to claim 3, characterized in that: The axes of the two eccentric shafts (11) are located on opposite sides of the axis of the transmission shaft (1).

5. The percussion transmission mechanism for a massager according to any one of claims 1 to 4, characterized in that: The hinge seat (21) is mounted on the eccentric shaft (11) via a support bearing (23).

6. The percussion transmission mechanism for a massager according to claim 5, characterized in that: The support bearing (23) is sleeved on the eccentric shaft (11), one side of the inner ring of the support bearing (23) abuts against the abutment surface (12) between the eccentric shaft (11) and the transmission shaft (1), and a side of the abutment surface (12) deviating from the axis of the eccentric shaft (11) is formed with Chamfered face (121).

7. The percussion transmission mechanism for a massager according to claim 5, characterized in that: The hinge seat (21) comprises a hinge seat sleeve (211), and the support bearing (23) is fitted in the hinge seat sleeve (211); A barrel mouth retaining ring (212) is integrally provided in the barrel mouth of one end of the hinge seat sleeve (211), and a barrel mouth end cover (213) is connected to the barrel mouth of the other end of the hinge seat sleeve (211), and the support bearing (23) is located between the barrel mouth retaining ring (212) and the barrel mouth end cover (213); Two sleeve ear plates (214) are arranged at intervals on one side of the hinge seat sleeve (211), and one end of the swing arm (22) is hinged between the two sleeve ear plates (214).

8. The percussion transmission mechanism for a massager according to any one of claims 1 to 4, characterized in that: The transmission shaft (1) is equipped with a transmission wheel (3) for transmission connection with a driving mechanism.

9. The percussion transmission mechanism for a massager according to claim 8, characterized in that: A one-way bearing (32) is installed between the transmission wheel (3) and the transmission shaft (1).

10. The percussion transmission mechanism for a massager according to claim 9, characterized in that: A transmission sleeve (31) is provided on one side of the transmission wheel (3); the transmission sleeve (31) is coaxially arranged with the transmission wheel (3); and the one-way bearing (32) is installed in the transmission sleeve (31).

11. The percussion device for a massager according to claim 10 The transmission mechanism is characterized in that A rotating bearing (33) is installed in the central hole of the transmission wheel (3); the rotating bearing (33) is located on one side of the one-way bearing (32); and the rotating bearing (33) and the one-way bearing (32) are coaxially arranged.

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