Pull rod type shoulder and back massager

Abstract

The utility model discloses a draw bar type shoulder and back massaging machine core, including machine core casing, drive motor, first transmission mechanism, second transmission mechanism, two eccentric mechanism, shoulder massage mechanism and back beating mechanism. Drive motor sets up in the machine core casing, and first transmission mechanism has kneading axle, and second transmission mechanism has beating axle and one -way limiting mechanism, and eccentric mechanism is fixed in the kneading axle both ends and includes first eccentric wheel and the eccentric wheel of inclination setting, and shoulder massage mechanism includes the kneading swing arm of the eccentric wheel on the sleeve setting, and back beating mechanism includes the second eccentric wheel of the beating axle on the sleeve setting, the massage top rod of the second eccentric wheel on the sleeve setting and the draw bar of hinged massage top rod and first eccentric wheel. The utility model discloses through single drive motor realizes shoulder kneading, back beating and shoulder and back clamping relaxation's compound massage function of relaxing, and the structure is compact, and the massage effect is good.

Description

Technical Field

[0001] This utility model relates to the technical field of massagers, and in particular to a lever-type shoulder and back massage mechanism. Background Technology

[0002] In modern society, people often suffer from shoulder and back pain due to prolonged sitting at work in offices, classrooms, dormitories, or homes, or looking down at their phones for extended periods.

[0003] Most existing vibrating massage devices are handheld. To use them, the user holds the device and aligns the massage head with the area to be massaged. A motor or electromagnet then drives the massage head to strike the area, providing a massage effect. This type of massage device is inconvenient to use, requiring the user to hold it in their hand. Especially for back massages, the device must be placed firmly against a chair back or bed, limiting its usability and affecting the massage effect.

[0004] Most existing shawl-style kneading massagers are designed for the neck and shoulders, while those that knead the shoulders and back or provide back massage are relatively rare. This makes it difficult to meet users' massage needs.

[0005] In view of this, this utility model is developed by deeply conceiving and actively researching and improving the design of existing shoulder and back massagers to address the many shortcomings and inconveniences caused by the imperfect massage structure design. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a lever-type shoulder and back massage mechanism that can massage the shoulders and back with good massage effect.

[0007] To achieve the above objectives, the solution of this utility model is: A lever-type shoulder and back massage mechanism includes: a mechanism housing, a drive motor, a first transmission mechanism, a second transmission mechanism, two swing mechanisms, a shoulder massage mechanism, and a back percussion mechanism; The drive motor is located inside the mechanism housing; The first transmission mechanism has a kneading shaft, and the first transmission mechanism is connected to a drive motor to drive the kneading shaft to rotate. The second transmission mechanism has a hammering shaft, and a one-way limit mechanism is provided on the hammering shaft. The second transmission mechanism is connected to a drive motor to drive the hammering shaft to rotate in one direction. Two eccentric mechanisms are symmetrically fixed at both ends of the kneading shaft. Each eccentric mechanism includes a first eccentric wheel arranged opposite to each other and an eccentric wheel arranged in opposite directions. The eccentric wheel is inclined relative to the first eccentric wheel to form an eccentric inclined surface. A shoulder massage mechanism includes two kneading arms and a shoulder massage head. The two kneading arms are correspondingly mounted on two eccentric wheels. The shoulder massage head is installed at the top of the kneading arms, and a limiting rod is provided at the bottom of the kneading arms. The mechanism housing is provided with a limiting groove for the limiting rod to move. The back-pounding mechanism includes two massage top rods, two second eccentric wheels, and two pull rods. The inner ends of the two second eccentric wheels are correspondingly sleeved on both ends of the pounding shaft, and the outer ends of the two second eccentric wheels are correspondingly sleeved on a massage top rod. The bottom end of the massage top rod is rotatably sleeved on the second eccentric wheel. The side of the massage top rod facing the kneading shaft is hinged to one end of the pull rod. The other end of the pull rod is sleeved on the first eccentric wheel of the swing mechanism. A back massage head is installed at the top of the massage top rod.

[0008] The drive motor simultaneously drives the first and second transmission mechanisms, causing the kneading shaft to rotate the sway mechanism. The swaying inclined surface of the sway wheel applies a circumferential thrust and a radial component force to the end of the kneading arm. Combined with the limiting action of the limiting rod in the limiting groove, the kneading arm makes a small-amplitude, fixed-trajectory periodic reciprocating swing with the sleeve of the sway mechanism as the fulcrum, realizing shoulder kneading massage. At the same time, the pull rod sleeved on the first eccentric wheel of the sway mechanism, under the action of the rotational driving force of the first eccentric wheel and the constraint force of the massage top rod, converts the rotational motion into up-and-down motion, driving the massage top rod to move up and down synchronously, realizing the shoulder and back clamping and relaxing massage effect. The second transmission mechanism drives the percussion shaft to rotate unidirectionally. The second eccentric wheels at both ends of the percussion shaft rotate and drive the massage top rod to move. Under the limiting action of the pull rod, the massage top rod converts the rotational motion into a back-and-forth tapping massage action, realizing back percussion massage. This invention utilizes a one-way limiting mechanism to control the unidirectional rotation of the percussion shaft. When the drive motor rotates in the opposite direction, the percussion shaft is limited by the one-way limiting mechanism and cannot rotate, thus preventing percussion massage. At this time, only the kneading motion and the clamping and relaxing massage effect are retained. Therefore, this invention uses a single drive motor to achieve a composite massage function of shoulder kneading, back percussion, and shoulder and back clamping and relaxing. It has a compact structure, rich massage modes, and effectively overcomes the shortcomings of existing massage devices that require handheld use, have limited functions, and cannot simultaneously achieve composite shoulder and back massage.

[0009] Furthermore, the mechanism housing includes a lower shell and an upper cover fitted onto the lower shell. A mounting base and an inner cover fitted onto the mounting base are provided within the lower shell and upper cover. The top of the mounting base and the bottom of the inner cover have upper and lower shaft holes spaced parallel to each other. The kneading shaft is mounted on the upper shaft hole of the mounting base, with both ends protruding beyond the left and right ends of the mounting base. The hammering shaft is mounted on the lower shaft hole via hammering bearings, with both ends protruding beyond the left and right ends of the mounting base. A motor mount is provided within the mounting base, and the drive motor is locked onto the motor mount. A mounting guide post is provided on the side of the mounting base corresponding to the first worm gear of the drive motor. A battery slot for battery installation is provided on one side of the bottom of the mounting base, with the battery positioned between the bottom surface of the mounting base and the lower shell. The kneading shaft and the pounding shaft are supported by upper and lower shaft holes formed by the mounting base and the inner cover, respectively. The drive motor, the first transmission mechanism and the second transmission mechanism are integrated in the space formed by the mounting base and the inner cover, which realizes the compact layout of the internal components of the mechanism, effectively reduces the overall size of the massager, facilitates the assembly and maintenance of the transmission components, reduces operating noise and improves massage comfort.

[0010] Furthermore, one end of the drive motor is connected to a first worm gear, which has a first helical tooth. The first transmission mechanism includes a kneading shaft, a first worm wheel meshing with the first helical tooth, a second worm gear fixedly connected to the first worm wheel and having a second helical tooth, and a second worm wheel meshing with the second worm gear. The second worm wheel is fixedly connected to the kneading shaft, and the first worm wheel and the second worm gear are integrally formed and rotatably mounted on the mounting guide post. This two-stage worm gear reduction transmission has a large transmission ratio and smooth torque transmission. Furthermore, the integral formation of the first worm wheel and the second worm gear on the mounting guide post reduces the number of intermediate connecting parts, resulting in a compact structure, high coaxiality, high transmission efficiency, and low operating noise.

[0011] Furthermore, the second transmission mechanism includes a hammering shaft, a drive wheel, a driven wheel, a belt, and the one-way limiting mechanism. The drive wheel is located on the side of the first worm gear near the drive motor and is spaced apart from the first helical teeth. The driven wheel is correspondingly spaced apart from the drive wheel. One end of the belt is sleeved on the drive wheel, and the other end is sleeved on the driven wheel. The hammering shaft is spaced apart from the kneading shaft and passes through the center of the driven wheel. The drive wheel and the driven wheel are flexibly connected by a belt, resulting in smooth transmission, buffering and vibration absorption, and low noise. Integrating the drive wheel directly onto the first worm gear reduces the number of parts and axial space occupation, simplifying the overall structure.

[0012] Furthermore, the one-way limiting mechanism is a one-way bearing, which is disposed between the driven wheel and the hammer shaft, allowing the hammer shaft to rotate unidirectionally relative to the driven wheel. The one-way bearing has a simple structure, reliable one-way limiting, and low cost. It can be directly fitted onto the center of the driven wheel to achieve unidirectional rotation control of the hammer shaft relative to the driven wheel. The assembly process is simple, and maintenance and replacement are convenient.

[0013] Furthermore, when the shoulder massage head rotates to its furthest position away from the back massage head, the back massage head moves to its lowest point. At this time, the distance between the shoulder massage head and the back massage head is at its maximum, and the shoulder massage head and the back massage head are in a relaxed state. When the shoulder massage head rotates closer to the back massage head, the back massage head moves to its highest point. At this time, the distance between the shoulder massage head and the back massage head is at its minimum, and the shoulder massage head and the back massage head are in a clamped state. The range of motion between the shoulder massage head and the back massage head is 70mm-100mm. The range of motion for the distance between the left and right shoulder massage heads is 50mm-150mm.

[0014] Furthermore, the first eccentric wheel and the eccentric wheel of the eccentric mechanism are connected by a connecting shaft. The end face of the connecting shaft connected to the first eccentric wheel is a vertical surface, and the end face of the connecting shaft connected to the eccentric wheel is an inclined surface, so that the eccentric wheel and the first eccentric wheel are inclined to form the eccentric inclined surface. The outer diameter of the connecting shaft is larger than the outer diameter of the first eccentric wheel and the outer diameter of the eccentric wheel, so that the two end faces of the connecting shaft respectively form abutment surfaces for the installation of the kneading swing arm and the pull rod. The kneading swing arm is sleeved on the eccentric wheel, the inner end of the kneading swing arm abuts against the abutment surface of the connecting shaft, and the outer end is limited on the eccentric mechanism by a baffle plate. The pull rod is sleeved on the first eccentric wheel, the outer end of the pull rod abuts against the abutment surface of the connecting shaft, and the inner end is limited on the first eccentric wheel by an eccentric cover plate. The outer diameter of the connecting shaft is larger than that of the first eccentric wheel and the swing wheel, forming a natural axial contact surface, which facilitates the axial positioning of the kneading swing arm and the pull rod. The baffle and the eccentric cover plate respectively limit the outer end of the kneading swing arm and the pull rod, forming a double axial constraint to prevent axial movement during operation and ensure the linkage accuracy and motion stability of the swing mechanism, the shoulder massage mechanism, and the back percussion mechanism.

[0015] Furthermore, the kneading swing arm is sleeved on the swing wheel of the swing mechanism, and the top of the kneading swing arm is provided with a front massage seat and a rear massage seat that are staggered up and down and left and right. A shoulder massage head is respectively installed on the front massage seat and the rear massage seat; the top of the massage rod extends upward at an angle away from the kneading shaft, and the top of the massage rod is provided with a massage head insertion post. The back massage head is detachably installed on the massage head insertion post.

[0016] The front and rear massage seats of the kneading arm are arranged in an alternating up-down and left-right pattern, allowing the shoulder massage heads to simulate the alternating kneading motion of the thumb and four fingers during the kneading process. This expands the coverage area of ​​the shoulder massage and enhances the realism and comfort of the kneading. The top of the massage rod extends upwards at an angle, allowing the back massage head at its tip to better conform to the curve of the human back, improving the comfort and effectiveness of the percussion massage. The back massage head can be detachably installed on the massage head insert, making it easy to replace massage heads of different hardness or shape according to user needs, and also facilitating cleaning and daily maintenance.

[0017] Furthermore, the second eccentric wheel includes a limiting mounting post, a top rod mounting post eccentrically positioned relative to the limiting mounting post, and a connecting post positioned between the limiting mounting post and the top rod mounting post. The limiting mounting post has a non-circular hole at its center, and both ends of the hammering shaft form non-circular inserts that correspond to and mate with the non-circular hole. The limiting mounting post, through its engagement with the non-circular inserts of the hammering shaft via the non-circular hole, achieves reliable circumferential fixation, stable torque transmission, and prevents slippage. The eccentric positioning of the top rod mounting post and the limiting mounting post ensures that the massage top rod achieves a stable and accurate reciprocating stroke, guaranteeing consistent hammering force.

[0018] Furthermore, the bottom end of the massage rod is provided with a sleeve hole, and a push rod bearing is provided inside the sleeve hole. The push rod bearing is installed on the push rod mounting post of the second eccentric wheel. One end of the sleeve hole is an opening to facilitate the installation of the push rod bearing, and the other end forms a constriction. The push rod bearing is inserted into the sleeve hole from the opening, so that the bottom end of the push rod bearing abuts against the inner wall of the constriction. The opening of the sleeve hole is closed by a hole cover, which is set on the connecting post of the second eccentric wheel. After the massage rod is installed, the constriction is sealed by a gasket. The gasket, the second eccentric wheel, and the hammering shaft are provided with corresponding locking holes. The gasket, the second eccentric wheel, and the hammering shaft are locked together by bolts. The opening at one end of the sleeve hole facilitates the installation of the push rod bearing, while the constriction forms an inner end limit for the push rod bearing. The hole cover and the gasket respectively seal the opening and the constriction, achieving double-end limit of the bearing, so that the massage push rod rotates smoothly around the second eccentric wheel. The gasket is also locked to the second eccentric wheel and the hammering shaft by bolts, which enhances the connection strength of the overall structure and facilitates disassembly and maintenance.

[0019] Furthermore, the massage rod has a pull rod movable groove on the upper part of the sleeve hole facing the kneading shaft. Through-hole shaft holes are provided on both sides of the pull rod movable groove. One end of the pull rod is inserted into the pull rod movable groove and hinged to the massage rod by a pin. The pull rod movable groove provides space for the hinge connection between the pull rod and the massage rod. The pin passes through the shaft hole to achieve the hinge connection. The structure is simple, the clearance between the moving parts is small, and the pull rod can efficiently and with low loss convert the rotational motion of the first eccentric wheel into the reciprocating motion of the massage rod, resulting in rapid linkage response.

[0020] The beneficial effects of this utility model of a pull-rod type shoulder and back massage mechanism are as follows: 1. This utility model uses a single drive motor to simultaneously drive the first transmission mechanism and the second transmission mechanism. Through the linkage of the sway mechanism, the shoulder massage mechanism, the back percussion mechanism and the pull rod, it realizes the compound massage functions of shoulder kneading massage, back percussion massage and shoulder and back clamping and relaxation. It has rich massage modes and good massage effect, effectively solving the problems of inconvenience of use of existing handheld massage devices and single function of shawl-style massagers.

[0021] 2. This utility model achieves unidirectional rotation control of the hammering shaft by setting a one-way limiting mechanism on the hammering shaft. When the drive motor rotates forward, it simultaneously has kneading, hammering, and clamping / relaxing functions. When it rotates in reverse, it only retains the kneading and clamping / relaxing functions without hammering. Users can select different massage modes according to their needs, which improves the applicability of the product and the user experience.

[0022] 3. This utility model forms an integrated transmission installation space by using the mounting base and inner cover inside the mechanism housing, which compactly arranges the drive motor, two-stage worm gear transmission mechanism and belt transmission mechanism, effectively reducing the overall size of the mechanism, reducing operating noise, and facilitating assembly and maintenance.

[0023] 4. The eccentric mechanism of this utility model achieves reliable axial positioning of the kneading swing arm and the pull rod through the connecting shaft, the baffle and the eccentric cover plate. The second eccentric wheel is fixed to the hammering shaft through non-circular fit. The massage top rod achieves reliable installation and positioning of the bearing through the sleeve hole, the narrowing, the hole cover and the gasket. All components are stably connected, with high motion accuracy and long service life. Attached Figure Description

[0024] Figure 1 This is an exploded view of the lever-type massage mechanism of this utility model.

[0025] Figure 2 This is a schematic diagram of the combined appearance of the massage mechanism of this utility model.

[0026] Figure 3 This is a partial exploded view of the massage mechanism of this utility model.

[0027] Figure 4 This is a schematic diagram of the drive motor, the first transmission mechanism, and the second transmission mechanism of this utility model.

[0028] Figure 5 This is a schematic diagram of the structure of the present invention with the core housing removed.

[0029] Figure 6 This is a side sectional view of the present invention.

[0030] Figure 7 This is an exploded view of the housing of the mechanism of this utility model.

[0031] Figure 8 This is a partial structural schematic diagram of the present invention.

[0032] Label Explanation: 1. Mechanism housing; 1A. Lower shell; 1B. Upper cover; 1C. Mounting base; 1D. Inner cover; 1E. Upper shaft hole; 1F. Lower shaft hole; 1G. Battery slot; 11. Limiting slot; 2. Drive motor; 21. First worm gear; 211. First helical gear; 22. Motor base; 31. Kneading shaft; 32. First worm wheel; 33. Second worm gear; 331. Second helical gear; 34. Second worm wheel; 35. Mounting guide post; 4. Second transmission mechanism; 41. Hammering shaft; 411. Non-circular insert; 42. Drive wheel; 43. Driven wheel; 44. Belt; 45. One-way limiting mechanism; 5. Oscillating mechanism; 51. First eccentric wheel; 52. Oscillating wheel; 53. Connecting shaft; 54. Oscillating wheel 55. Inclined surface; 56. Baffle plate; 6. Eccentric cover plate; 6. Shoulder massage mechanism; 61. Kneading swing arm; 611. Limiting rod; 612. Front massage seat; 613. Rear massage seat; 62. Shoulder massage head; 71. Massage top rod; 711. Back massage head; 712. Sleeve hole; 713. Opening; 714. Narrowing opening; 715. Pull rod movable groove; 716. Shaft hole; 717. Massage head insertion post; 72. Second eccentric wheel; 721. Limiting mounting post; 722. Top rod mounting post; 723. Connecting post; 724. Non-circular hole; 73. Pull rod; 74. Hammering bearing; 75. Top rod bearing; 76. Hole cover; 77. Gasket; 78. Pin; 8. Battery; 9. Circuit board. Detailed Implementation

[0033] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] like Figures 1 to 8 As shown, this utility model discloses a pull rod type shoulder and back massage mechanism, which includes a mechanism housing 1, a drive motor 2, a first transmission mechanism with a kneading shaft 31, a second transmission mechanism 4 with a pounding shaft 41, a swing mechanism 5, a shoulder massage mechanism 6, and a back pounding mechanism.

[0036] The drive motor 2, the first transmission mechanism, and the second transmission mechanism 4 are all located inside the core housing 1. The drive motor 2 is connected to the first transmission mechanism and the second transmission mechanism 4. The first transmission mechanism drives the kneading shaft 31 to rotate. The second transmission mechanism 4 is provided with a one-way limiting mechanism 45 that restricts the one-way rotation of the pounding shaft 41. The second transmission mechanism 4 drives the pounding shaft 41 to rotate in one direction. The kneading shaft 31 of the first transmission mechanism is symmetrically provided with the swing mechanism 5 on the left and right sides. Each swing mechanism 5 has a first eccentric wheel 51 and a swing wheel 52. The swing wheel 52 and the first eccentric wheel 51 are inclined to form a swing inclined surface 54. The inner end of the two swing mechanisms 5 is provided with the first eccentric wheel 51, and the outer end is provided with the swing wheel 52.

[0037] The shoulder massage mechanism 6 includes two kneading arms 61 and a shoulder massage head 62. The kneading arms 61 are sleeved on the eccentric wheel 52. The shoulder massage head 62 is installed at the top of the kneading arms 61. The bottom of the kneading arms 61 is provided with a limiting rod 611. The core housing 1 is provided with a limiting groove 11 for the limiting rod 611 to move.

[0038] The back-pounding mechanism includes two massage top rods 71, two second eccentric wheels 72, and two pull rods 73. The two second eccentric wheels 72 are symmetrically sleeved at both ends of the pounding shaft 41. The two ends of the pounding shaft 41 are sleeved with pounding bearings 74. The outer ends of the two second eccentric wheels 72 are connected to the bottom ends of the two massage top rods 71. The top ends of the two massage top rods 71 ​​are equipped with back massage heads 711. The side of the massage top rod 71 facing the kneading shaft 31 is hinged to one end of the pull rod 73. The other end of the pull rod 73 is sleeved on the first eccentric wheel 51 of the swing mechanism 5.

[0039] When the pull rod type shoulder and back massager is running, the drive motor 2 rotates forward, driving the kneading shaft 31 of the first transmission mechanism to rotate. The kneading shaft 31 drives the two swaying mechanisms 5 to rotate. The swaying inclined surface 54 of the swaying wheel 52 applies a circumferential thrust and a radial component force to the end of the kneading arm 61. The limiting rod 611 at the bottom of the kneading arm 61 limits the movement angle of the kneading arm 61, so that the kneading arm 61 uses the sleeve of the swaying mechanism 5 as the fulcrum to make a small-amplitude, fixed-track periodic reciprocating swing, without producing excessively large-angle swings.

[0040] While the sway mechanism 5 rotates, the pull rod 73 sleeved on the sway mechanism 5 converts the rotational motion into up-and-down motion under the rotational driving force of the first eccentric wheel 51 and the constraint force of the massage top rod 71, driving the massage top rod 71 to move up and down synchronously. The massage top rod 71 and the kneading swing arm 61 work together to achieve the massage effect of tightening and relaxing the shoulders and back.

[0041] Meanwhile, the second transmission mechanism 4, constrained by the one-way limiting mechanism, controls the percussion shaft 41 to rotate only in one direction. When the percussion shaft 41 rotates, it drives the second eccentric wheels 72 at both ends of the percussion shaft 41 to rotate, which in turn drives the massage top rod 71 to move synchronously. Under the limiting action of the pull rod 73, the massage top rod 71 converts the rotational motion into a back-and-forth tapping massage action, which then acts on the back massage head 711 on the massage top rod 71, realizing shoulder kneading massage, back percussion massage, and a massage action that combines shoulder and back to achieve clamping and relaxation, thereby improving the massage effect. When the drive motor 2 drives the drive wheel 42 to rotate in the opposite direction, the percussion shaft 41 is limited by the one-way limiting mechanism and cannot rotate, that is, it cannot perform percussion massage. At this time, it only has the kneading action and clamping and relaxation massage effect, without the percussion action.

[0042] In this embodiment, the mechanism housing 1 includes a lower shell 1A and an upper cover 1B. The lower shell 1A and the upper cover 1B are provided with a mounting base 1C and an inner cover 1D that fits on the mounting base 1C. The top end of the mounting base 1C and the bottom end of the inner cover 1D have upper shaft holes 1E and lower shaft holes 1F that are arranged parallel to each other. The kneading shaft 31 is disposed on the upper shaft hole 1E of the mounting base 1C. Both ends of the kneading shaft 31 protrude to the left and right ends of the mounting base 1C for connection of the two oscillating mechanisms 5, the shoulder massage mechanism 6 and the pull rod 73. The percussion shaft 41 is disposed on the lower shaft hole 1F through a percussion bearing 74. Both ends of the percussion shaft 41 protrude to the left and right ends of the mounting base 1C for installation of the two second eccentric wheels 72 and the two massage top rods 71. A motor mount 22 is provided inside the mounting base 1C. The drive motor 2 is locked onto the motor mount 22. A mounting guide post 35 is provided on the side of the mounting base 1C corresponding to the first worm 21 of the drive motor 2. The first worm wheel 32 and the second worm 33 are integrally formed and are centrally sleeved on the mounting guide post 35, so that the first worm wheel 32 and the second worm 33 can be driven to rotate by the drive motor 2. The first transmission mechanism and the second transmission mechanism 4 are both installed inside the mounting base 1C and the inner cover 1D. A battery slot 1G for installing the battery 8 is provided on one side of the bottom of the mounting base 1C. The battery 8 is limited and installed between the bottom surface of the mounting base 1C and the lower shell 1A. The upper cover 1B covers the inner cover 1D. The circuit board 9 and the heating lamp plate can be installed between the inner cover 1D and the upper cover 1B. The oscillation mechanism 5, the shoulder massage mechanism 6, and the back tapping mechanism are exposed outside the upper cover 1B. This utility model provides a mounting base 1C and an inner cover 1D inside the core housing 1, integrating the drive motor 2, the first transmission mechanism and the second transmission mechanism 4 within the space formed by the mounting base 1C and the inner cover 1D. This allows for a compact layout design, effectively reducing the overall size of the massager and facilitating the assembly and maintenance of the transmission components. In addition, it can also reduce operating noise and improve massage comfort.

[0043] In this embodiment, one end of the drive motor 2 is connected to a first worm gear 21, and the first worm gear 21 is provided with a first helical tooth 211. The first transmission mechanism includes a kneading shaft 31, a first worm wheel 32 meshing with the first helical tooth 211, a second worm gear 33 fixedly connected to the first worm wheel 32 and having a second helical tooth 331, and a second worm wheel 34 meshing with the second worm gear 33. The second worm wheel 34 is fixedly connected to the kneading shaft 31.

[0044] The second transmission mechanism 4 includes a hammering shaft 41, a drive wheel 42, a driven wheel 43, a belt 44, and a one-way limiting mechanism 45. The drive wheel 42 is located on the side of the first worm gear 21 near the drive motor 2 and is spaced apart from the first helical teeth 211. The driven wheel 43 is spaced apart from the drive wheel 42. One end of the belt 44 is sleeved on the drive wheel 42, and the other end is sleeved on the driven wheel 43. The hammering shaft 41 is spaced apart from the kneading shaft 31 and passes through the center of the driven wheel 43. The one-way limiting mechanism 45 connects the hammering shaft 41 and the driven wheel 43 and controls the hammering shaft 41 to rotate in one direction.

[0045] The function of the one-way limiting mechanism 45 is to limit the one-way rotation of the hammer shaft 41. There are various ways to use it. In this embodiment, the one-way limiting mechanism 45 uses a one-way bearing. The one-way bearing is sleeved in the center of the passive wheel 43. The rotation of the hammer shaft 41 is controlled by the forward or reverse rotation of the drive motor 2.

[0046] The first eccentric wheel 51 and the eccentric wheel 52 of the eccentric mechanism 5 are connected by a connecting shaft 53. The end face of the connecting shaft 53 connected to the first eccentric wheel 51 is a vertical surface, and the end face of the connecting shaft 53 connected to the eccentric wheel 52 is an inclined surface, so that the eccentric wheel 52 and the first eccentric wheel 51 are inclined to form the eccentric inclined surface 54. The outer diameter of the connecting shaft 53 is larger than that of the first eccentric wheel 51 and the eccentric wheel 52, so that the two end faces of the connecting shaft 53 form abutment surfaces for the kneading swing arm 61 and the pull rod 73 to be installed. The kneading swing arm 61 is sleeved on the eccentric wheel 52. The inner end of the kneading swing arm 61 abuts against the abutting surface of the connecting shaft 53, and the outer end is limited to the eccentric mechanism 5 by the baffle 55. The pull rod 73 is sleeved on the first eccentric wheel 51. The outer end of the pull rod 73 abuts against the abutting surface of the connecting shaft 53, and the inner end is limited to the first eccentric wheel 51 by the eccentric cover plate 56.

[0047] The kneading arm 61 is sleeved on the swing wheel 52 of the swing mechanism 5. The top of the kneading arm 61 is provided with a front massage seat 612 and a rear massage seat 613 that are staggered up and down and left and right. A shoulder massage head 62 is installed on the front massage seat 612 and the rear massage seat 613 respectively.

[0048] The second eccentric wheel 72 includes a limiting mounting post 721, a top rod mounting post 722 eccentrically arranged with the limiting mounting post 721, and a connecting post 723 disposed between the limiting mounting post 721 and the top rod mounting post 722. The limiting mounting post 721 has a non-circular hole 724 at its center, and the two ends of the hammer shaft 41 form non-circular inserts 411 that correspond to and cooperate with the non-circular hole 724. The bottom end of the massage rod 71 is provided with a sleeve hole 712, and a rod bearing 75 is provided in the sleeve hole 712. The rod bearing 75 is installed on the rod mounting post 722. One end of the sleeve hole 712 is an opening 713 to facilitate the installation of the rod bearing 75, and the other end forms a constriction 714. The rod bearing 75 is inserted into the sleeve hole 712 through the opening 713, so that the bottom end of the rod bearing 75 abuts against the inner wall of the constriction 714. The opening 713 of the sleeve hole 712 is covered by a hole cover 76, which is set on the connecting post 723 of the second eccentric wheel 72. After the massage rod 71 is installed, the constriction 714 is sealed by a gasket 77. The gasket 77, the second eccentric wheel 72 and the hammering shaft 41 are provided with corresponding locking holes. The gasket 77, the second eccentric wheel 72 and the hammering shaft 41 are locked together by bolts. The massage rod 71 has a pull rod movable groove 715 on the upper part of the sleeve hole 712 facing the kneading shaft 31. Through shaft holes 716 are provided on both sides of the pull rod movable groove 715. One end of the pull rod 73 is inserted into the pull rod movable groove 715 and is hinged to the massage rod 71 by a pin 78. The top end of the massage rod 71 extends upwards at an angle away from the pull rod movable groove 715. A massage head insertion post 717 is provided at the top end of the massage rod 71, and the back massage head 711 is detachably mounted on the massage head insertion post 717.

[0049] When the drive motor 2 rotates forward, it drives the first worm gear 21 to rotate. The first helical teeth 211 on the first worm gear 21 drive the first worm wheel 32 to rotate. The second worm gear 33, which is integrally formed with the first worm wheel 32, rotates synchronously. The second worm gear 33 drives the second worm wheel 34 to rotate through the second helical teeth 331, which in turn drives the kneading shaft 31, which is fixedly connected to the second worm wheel 34, to rotate. The kneading shaft 31 drives the two oscillating mechanisms 5 to rotate. The oscillating inclined surface 54 of the oscillating wheel 52 applies a circumferential thrust and a radial component force to the end of the kneading arm 61. The limiting rod 611 at the bottom of the kneading arm 61 moves in the limiting groove 11, limiting the movement angle of the kneading arm 61. This allows the kneading arm 61 to make small-amplitude, fixed-trajectory periodic reciprocating swings with the sleeve of the oscillating mechanism 5 as the fulcrum, without producing excessively large-angle swings, thereby driving the shoulder massage head 62 to knead and massage the user's shoulders.

[0050] As the oscillating mechanism 5 rotates, the pull rod 73, mounted on the first eccentric wheel 51 of the oscillating mechanism 5, converts the rotational motion of the first eccentric wheel 51 into a reciprocating up-and-down motion under the driving force of the rotation of the first eccentric wheel 51 and the constraint force of the massage rod 71, thus driving the massage rod 71 to move up and down synchronously. The massage rod 71, in conjunction with the kneading arm 61, can achieve a massage effect of tightening and relaxing the shoulders and back.

[0051] Simultaneously, when the first worm gear 21 rotates forward, it drives the drive wheel 42 to rotate forward, and the drive wheel 42 drives the driven wheel 43 to rotate forward via the belt 44. Due to the one-way limiting mechanism 45 (one-way bearing), when the driven wheel 43 rotates forward, it drives the percussion shaft 41 to rotate synchronously in one direction. When the percussion shaft 41 rotates, it drives the second eccentric wheels 72 at both ends of the percussion shaft 41 to rotate. The top rod mounting column 722 of the second eccentric wheel 72 rotates eccentrically around the limiting mounting column 721, driving the massage top rod 71 to move. Under the limiting constraint of the pull rod 73, the massage top rod 71 converts the rotational motion of the second eccentric wheel 72 into a back-and-forth tapping massage action. This tapping action is transmitted to the back massage head 711 at the top of the massage top rod 71, realizing a percussion massage on the user's back. Thus, when the drive motor 2 rotates forward, this utility model simultaneously realizes shoulder kneading massage, back percussion massage, and a clamping and relaxing massage action between the shoulder and back. The three massage functions work together to significantly improve the massage effect.

[0052] When the drive motor 2 reverses, the first worm gear 21 rotates in the opposite direction, the first transmission mechanism operates in the opposite direction, the kneading shaft 31 rotates in the opposite direction, the sway mechanism 5 reverses accordingly, the shoulder massage mechanism 6 performs reverse kneading massage, the pull rod 73 continues to move with the first eccentric wheel 51, and the massage top rod 71 continues to move up and down to achieve a shoulder and back clamping and relaxing effect. At the same time, the first worm gear 21 drives the drive wheel 42 to rotate in the opposite direction, and the driven wheel 43 reverses accordingly. Due to the limiting effect of the one-way limiting mechanism 45, the driven wheel 43 cannot drive the percussion shaft 41 to rotate when it reverses, that is, the percussion shaft 41 remains stationary, the second eccentric wheel 72 does not rotate, and the massage top rod 71 no longer produces a back-and-forth percussion action. At this time, this utility model only has the kneading action and clamping and relaxing massage effect, without the percussion action, realizing the switching of massage modes.

[0053] In this embodiment, both the first transmission mechanism and the second transmission mechanism 4 are installed within the mounting base 1C and the inner cover 1D, forming a closed transmission space. The drive motor 2 is locked onto the motor base 22, the battery 8 is positioned between the battery slot 1G and the lower shell 1A, and the circuit board 9 is installed between the inner cover 1D and the upper cover 1B. The functional modules are arranged in separate zones, resulting in a compact structure, convenient assembly, and stable operation.

[0054] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A pull-rod type shoulder and back massage mechanism, characterized in that, include: Movement housing; The drive motor is located inside the mechanism housing; The first transmission mechanism has a kneading shaft, and the first transmission mechanism is connected to a drive motor to drive the kneading shaft to rotate. The second transmission mechanism has a hammering shaft with a one-way limiting mechanism on the hammering shaft. The second transmission mechanism is connected to a drive motor to drive the hammering shaft to rotate in one direction. Two eccentric mechanisms are symmetrically fixed at both ends of the kneading shaft. Each eccentric mechanism includes a first eccentric wheel and an eccentric wheel. The first eccentric wheels of the two eccentric mechanisms are arranged opposite each other, and the eccentric wheels of the two eccentric mechanisms are arranged opposite each other. The eccentric wheels are inclined relative to the first eccentric wheels to form an eccentric inclined surface. A shoulder massage mechanism includes two kneading arms and a shoulder massage head. The two kneading arms are correspondingly mounted on two eccentric wheels. The shoulder massage head is installed at the top of the kneading arms, and a limiting rod is provided at the bottom of the kneading arms. The mechanism housing is provided with a limiting groove for the limiting rod to move. The back-pounding mechanism includes two massage top rods, two second eccentric wheels, and two pull rods. The inner ends of the two second eccentric wheels are correspondingly sleeved on both ends of the pounding shaft, and the outer ends of the two second eccentric wheels are correspondingly sleeved on a massage top rod. The bottom end of the massage top rod is rotatably sleeved on the second eccentric wheel. The side of the massage top rod facing the kneading shaft is hinged to one end of the pull rod. The other end of the pull rod is sleeved on the first eccentric wheel of the swing mechanism. A back massage head is installed at the top of the massage top rod.

2. The pull rod type shoulder and back massage mechanism as described in claim 1, characterized in that: The mechanism housing includes a lower shell and an upper cover. The upper cover is fitted onto the lower shell. A mounting base and an inner cover fitted onto the mounting base are located within the lower shell and the upper cover. The top of the mounting base and the bottom of the inner cover have upper and lower shaft holes spaced parallel to each other. The kneading shaft is mounted on the upper shaft hole of the mounting base, with both ends protruding beyond the left and right ends of the mounting base. The hammering shaft is mounted on the lower shaft hole via hammering bearings, with both ends protruding beyond the left and right ends of the mounting base. A motor mount is located within the mounting base, and the drive motor is locked onto the motor mount. A mounting guide post is located on the side of the mounting base corresponding to the first worm gear of the drive motor. A battery slot for battery installation is located on one side of the bottom of the mounting base, with the battery positioned between the bottom surface of the mounting base and the lower shell.

3. The pull rod type shoulder and back massage mechanism as described in claim 2, characterized in that: One end of the drive motor is connected to a first worm gear, which has a first helical tooth. The first transmission mechanism includes a kneading shaft, a first worm wheel meshing with the first helical tooth, a second worm gear fixedly connected to the first worm wheel and having a second helical tooth, and a second worm wheel meshing with the second worm gear. The second worm wheel is fixedly connected to the kneading shaft, and the first worm wheel and the second worm gear are integrally formed and rotatably mounted on the mounting guide post.

4. The pull rod type shoulder and back massage mechanism as described in claim 3, characterized in that: The second transmission mechanism includes a hammering shaft, a drive wheel, a driven wheel, a belt, and the one-way limiting mechanism. The drive wheel is located on the side of the first worm gear near the drive motor and is spaced apart from the first helical teeth. The driven wheel is spaced apart from the drive wheel. One end of the belt is sleeved on the drive wheel and the other end is sleeved on the driven wheel. The hammering shaft is spaced apart from the kneading shaft and passes through the center of the driven wheel.

5. The pull rod type shoulder and back massage mechanism as described in claim 4, characterized in that: When the shoulder massage head rotates to its furthest position away from the back massage head, the back massage head moves to its lowest point. At this time, the distance between the shoulder massage head and the back massage head is at its maximum, and the shoulder massage head and the back massage head are in a relaxed state. When the shoulder massage head rotates closer to the back massage head, the back massage head moves to its highest point. At this time, the distance between the shoulder massage head and the back massage head is at its minimum, and the shoulder massage head and the back massage head are in a clamped state. The range of motion between the shoulder massage head and the back massage head is 70mm-100mm. The range of motion for the distance between the left and right shoulder massage heads is 50mm-150mm.

6. The pull rod type shoulder and back massage mechanism as described in claim 1, characterized in that: The first eccentric wheel and the eccentric wheel of the eccentric mechanism are connected by a connecting shaft. The end face of the connecting shaft connected to the first eccentric wheel is a vertical surface, and the end face of the connecting shaft connected to the eccentric wheel is an inclined surface, so that the eccentric wheel and the first eccentric wheel are inclined to form the eccentric inclined surface. The outer diameter of the connecting shaft is larger than the outer diameter of the first eccentric wheel and the outer diameter of the eccentric wheel, so that the two ends of the connecting shaft respectively form abutment surfaces for the installation of the kneading swing arm and the pull rod. The kneading swing arm is sleeved on the eccentric wheel, the inner end of the kneading swing arm abuts against the abutment surface of the connecting shaft, and the outer end is limited on the eccentric mechanism by a baffle plate. The pull rod is sleeved on the first eccentric wheel, the outer end of the pull rod abuts against the abutment surface of the connecting shaft, and the inner end is limited on the first eccentric wheel by an eccentric cover plate.

7. The pull rod type shoulder and back massage mechanism as described in claim 1, characterized in that: The kneading arm is sleeved on the swing wheel of the swing mechanism. The top of the kneading arm is provided with a front massage seat and a rear massage seat that are staggered up and down and left and right. A shoulder massage head is installed on the front massage seat and the rear massage seat respectively. The top of the massage rod extends upward at an angle away from the kneading shaft. A massage head insertion post is provided at the top of the massage rod. The back massage head is detachably installed on the massage head insertion post.

8. The pull rod type shoulder and back massage mechanism as described in claim 1, characterized in that: The second eccentric wheel includes a limiting mounting post, a top rod mounting post eccentrically arranged with respect to the limiting mounting post, and a connecting post arranged between the limiting mounting post and the top rod mounting post. The limiting mounting post has a non-circular hole at its center, and the two ends of the hammer shaft form non-circular inserts that correspond to and cooperate with the non-circular hole.

9. A pull-rod type shoulder and back massage mechanism as described in claim 8, characterized in that: The bottom end of the massage rod is provided with a sleeve hole, and a push rod bearing is installed in the sleeve hole. The push rod bearing is installed on the push rod mounting post of the second eccentric wheel. One end of the sleeve hole is an opening to facilitate the installation of the push rod bearing, and the other end forms a constriction. The push rod bearing is inserted into the sleeve hole from the opening, so that the bottom end of the push rod bearing abuts against the inner wall of the constriction. The opening of the sleeve hole is closed by a hole cover, which is set on the connecting post of the second eccentric wheel. After the massage rod is installed, the constriction is sealed by a gasket. The gasket, the second eccentric wheel and the hammering shaft are provided with corresponding locking holes. The gasket, the second eccentric wheel and the hammering shaft are locked together by bolts.

10. A pull-rod type shoulder and back massage mechanism as described in claim 9, characterized in that: The massage top rod has a pull rod movable groove on the upper part of the sleeve hole facing the kneading shaft. The pull rod movable groove has through shaft holes on both sides. One end of the pull rod is inserted into the pull rod movable groove and the pull rod is hinged to the massage top rod by a pin.

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