Mechanical waist and back massage assembly and automobile seat

Abstract

The mechanical waist and back massage assembly comprises a mounting base body, a first rotating shaft and a first driving mechanism for driving the first rotating shaft to rotate are arranged on the mounting base body, two sets of massage arms are rotationally mounted on the first rotating shaft, and the two sets of massage arms are arranged in the width direction of the mounting base body; massage heads are arranged at the ends, away from the first rotating shaft, of the two massage arms; two annular grooves are formed in the first rotating shaft, one ends of the two sets of massage arms are rotationally arranged on the two annular grooves in a sleeving mode respectively, and the side walls of the two sides of each annular groove are obliquely arranged relative to the center line of the first rotating shaft; the first driving mechanism drives the first rotating shaft to rotate, so that the massage head at the far end can form kneading massage; a second driving mechanism is arranged on the mounting base body and is used for enabling the massage head to form knocking massage. The massage device has the advantages that the massage functions of kneading and knocking are achieved, the structural layout is compact, and the massage effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, and in particular to a mechanical waist and back massage assembly and an automobile seat. Background Art

[0002] With the advancement of technology, people's requirements for the comfort of car seats are constantly increasing. Therefore, more and more seats are beginning to be equipped with massage functions to relieve physical fatigue and muscle stiffness caused by long-term driving and riding, and improve users' riding comfort.

[0003] In the prior art, massagers on car seats are divided into two categories: air bag massage and mechanical massage. Among them, air bag massage uses a flexible air bag to act on the user's waist and back area, with low massage intensity and poor massage effect, and it is difficult to fully and deeply relax the user's body. Most mechanical massage devices use a rotatable massage device to directly press on the user's back. Although the massage intensity is greater than that of air bag massage, it has the defects of large size and single massage method, which is still far behind professional massage seats and manual massage.

[0004] Therefore, it is necessary to design a massage mechanism with multiple massage functions to enhance the massage effect and enrich the functions of the seat. Summary of the invention

[0005] In view of this, one of the purposes of the present invention is to provide a mechanical waist and back massage assembly, which has both kneading and tapping massage functions and has the advantages of compact structure and layout and good massage effect.

[0006] To achieve the above purpose, the technical solution of the present invention is as follows:

[0007] A mechanical waist and back massage assembly, the key of which is: comprising a mounting base for assembly into a seat back, the mounting base being provided with a first rotating shaft and a first driving mechanism for driving the first rotating shaft to rotate, two groups of massage arms being rotatably mounted on the first rotating shaft, the two groups of massage arms being arranged along the width direction of the mounting base, and massage heads being provided at one end of the two groups of massage arms away from the first rotating shaft;

[0008] The first rotating shaft is provided with two annular grooves, one end of the two groups of massage arms are respectively rotatably sleeved on the two annular grooves, both side walls of the annular grooves are inclined relative to the center line of the first rotating shaft, and both sides of the massage arms close to one end of the first rotating shaft are respectively in sliding contact with the side walls of the annular grooves;

[0009] The first driving mechanism drives the first rotating shaft to rotate, and can force the massage arm to swing back and forth along the axis of the first rotating shaft under the transmission effect of the inclined side wall of the annular groove, so that the massage head at the far end forms a kneading massage;

[0010] The installation base is provided with a second driving mechanism, which is used to drive the massage arm to swing back and forth within a certain range relative to the first rotating shaft, so that the massage head at the far end can perform a percussion massage.

[0011] With the above structure, after the device is integrated inside the seat back, a cover is provided on the surface of the back. When the kneading massage device is working, the first drive mechanism C drives the first rotating shaft to rotate and transmits the power to the massage arm. Since the massage head B3 at the far end of the massage arm will be subject to the resistance of the seat cover or the user's back, the massage arm cannot make a circular motion around the first rotating shaft, and the massage head B3 will continuously act on the user's back. In addition, the inclined side wall of the annular groove B11 and the side wall of the massage arm form an inclined cam transmission, so the rotation of the first rotating shaft can force the massage arm to swing back and forth along the axis of the first rotating shaft, that is, the massage arm can swing left and right, so that the massage head B3 at the far end can perform a reciprocating swing kneading massage on the user's back. The second drive mechanism drives the two groups of massage arms to swing back and forth toward the front side of the backrest, that is, the user's waist and back, that is, it can drive the massage heads at the far end of the two groups of massage arms to perform a reciprocating percussion massage on the user's back.

[0012] Preferably, the mounting base includes a mounting base plate for being assembled inside a seat back, and a support plate slidably connected to the mounting base plate, the support plate slides along the height direction of the mounting base plate, the first rotating shaft, the first driving mechanism and the second driving mechanism are arranged on the support plate, and a third driving mechanism is provided on the mounting base plate, the third driving mechanism is used to drive the slide seat to slide along the height direction of the mounting base plate.

[0013] Preferably, the second driving mechanism comprises a second rotating shaft arranged below the two groups of massage arms, and a second driving assembly driving the second rotating shaft to rotate, two transmission sleeves are rotatably mounted on the second rotating shaft, the center lines of the two transmission sleeves are eccentrically arranged relative to the center line of the second rotating shaft, and the two transmission sleeves correspond to the two groups of massage arms one by one, a connecting rod is arranged between the transmission sleeves and the corresponding massage arms, one end of the connecting rod is hinged to the transmission sleeve, and the other end is hinged to the middle of the massage arm;

[0014] The second driving assembly drives the second rotating shaft to rotate, and can drive the massage arm to swing back and forth within a certain range under the eccentric transmission action of the transmission sleeve.

[0015] Preferably, the eccentric directions of the two transmission sleeves are opposite.

[0016] Preferably, the first rotating shaft comprises a central shaft and a sleeve fixedly mounted on the central shaft, the annular groove is provided on the sleeve, one end of the massage arm has an annular sleeve hole adapted to the annular groove, and the annular sleeve hole is rotatably mounted on the annular groove.

[0017] Preferably, a support component and a thrust mechanism for controlling the sliding of the support component are slidably mounted on the mounting base, and the second rotating shaft is rotatably sleeved on the support component; the sliding of the support component can drive the massage arm to rotate around the first rotating shaft via the connecting rod, so that the massage head moves away from or close to the mounting base.

[0018] Preferably, the thrust mechanism comprises a limit block abutting against the support component and a first driving assembly driving the limit block to move along the sliding direction of the support component; an elastic element is provided between the device base and the support component, and the elastic element applies a force to make the support component abut against the limit block; when the massage head is pressed by external force, the support component can overcome the resistance of the elastic element and slide to make the massage head move toward the mounting base.

[0019] Preferably, the seat backrest further comprises a support plate for being arranged in the seat backrest, the support plate is located in front of the mounting base, and the two groups of massage arms are arranged between the mounting base and the support plate in the vertical direction, and an opening is provided in the middle of the support plate, and the width of the opening is adapted to the minimum spacing between the two groups of massage arms and the massage head;

[0020] The first driving mechanism drives the first rotating shaft to rotate, and can force the massage arm to swing back and forth along the axis of the first rotating shaft under the transmission of the inclined side wall of the annular groove and the constraint of the connecting rod. After the distance between the two groups of massage arms is widened, the thrust mechanism drives the supporting component to slide, and can drive the massage arm to rotate around the first rotating shaft through the connecting rod, so that the massage head can push the support plate to move forward relative to the mounting base.

[0021] The second object of the present invention is to provide a car seat, the key of which is that it includes a backrest, and the above-mentioned mechanical waist and back massage assembly is integrated and installed inside the backrest.

[0022] Preferably, the backrest comprises backrest foam, a sinking area is provided on the front surface of the backrest foam, the sinking area is provided with two groups of strip-shaped through grooves extending in the height direction of the backrest, a wear-resistant cloth is provided on the front side of the backrest foam, the wear-resistant cloth comprises a covering layer covering the surface of the backrest foam, a telescopic layer is provided on the rear side of the covering layer, and the telescopic layer is arranged in the sinking area in a folded manner;

[0023] The mechanical waist and back massage assembly is installed on the rear side of the backrest foam, the two groups of massage arms correspond to the two groups of strip-shaped through grooves one by one, the massage arms rotate relative to the first rotating shaft, and the massage heads at the far ends thereof can extend into the corresponding strip-shaped through grooves and act on the wear-resistant cloth. When the wear-resistant cloth is pushed outward by the massage heads, the telescopic layer can be forced to stretch outward so that the wear-resistant cloth can bulge outward.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The mechanical waist and back massage assembly provided by the present invention can control the movement of two groups of massage arms so that the massage head at the far end can perform tapping massage or kneading massage on the user's back, which has the technical advantages of simple and compact structure and rich functions.

[0026] 2. The mechanical waist and back massage assembly provided by the present invention can not only realize massage functions such as fixed-point kneading, fixed-point tapping, walking kneading, walking tapping and walking massage, but also has a lumbar support function, which improves the user's riding experience and comfort, and through a reasonable and compact structural layout, the device can be integrated inside the backrest more thinly and compactly.

[0027] 3. When the mechanical waist and back massage assembly provided by the present invention is used with the waist support or massage function, when the vehicle collides or other emergencies occur, the massage arms and the massage heads can be collapsed reversibly, thus ensuring the safety of massage and waist support. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of a mechanical waist and back massage assembly integrated inside the backrest A;

[0029] Figure 2 is a schematic diagram of the structure of the backrest foam A1;

[0030] Figure 3 It is a schematic diagram of the structure of the wear-resistant cloth A2;

[0031] Figure 4 It is a structural schematic diagram of a mechanical waist and back massage assembly;

[0032] Figure 5 is a partial cross-sectional view of the first rotation axis B1;

[0033] Figure 6 It is a structural schematic diagram of the mechanical waist and back massage assembly in use;

[0034] Figure 7 Another structural schematic diagram of the mechanical waist and back massage assembly in use;

[0035] Figure 8 It is a cross-sectional view of the mechanical waist and back massage assembly when not in use;

[0036] Fig. 9 It is a cross-sectional view of the mechanical waist and back massage assembly in use;

[0037] Fig.10 is a schematic structural diagram of the second rotating shaft D1;

[0038] Fig.11A schematic diagram showing the positional relationship between the support component B4 and the thrust mechanism F;

[0039] Fig.12 It is a front view of the mechanical waist and back massage assembly (with a support plate B5 connected);

[0040] Fig.13 A schematic diagram of a mechanical waist and back massage assembly when a lumbar support is used. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with embodiments and drawings.

[0042] like Figure 1 As shown, a car seat includes a backrest A, and a mechanical waist and back massage assembly is integrated and installed inside the backrest A. Figure 4 As shown, the mechanical waist and back massage assembly includes a mounting base B. In this embodiment, the mounting base B includes a mounting base plate 1 and a support plate 2 slidably mounted on the mounting base plate 1. The mounting base plate 1 is mounted inside the seat back A, and the support plate 2 can slide along the height direction of the mounting base plate 1. Figure 7 As shown, the support plate 2 is rotatably provided with a first rotating shaft B1 and a first driving mechanism C driving the first rotating shaft B1 to rotate, wherein two groups of massage arms B2 are rotatably connected to the first rotating shaft B1, and the two groups of massage arms B2 are symmetrically arranged along the width direction of the mounting base B, and the ends of the two groups of massage arms B2 away from the first rotating shaft B1 are provided with massage heads B3. In this embodiment, the massage heads B3 are massage rollers. Figure 5 and Figure 7 , two annular grooves B11 are provided on the first rotating shaft B1, and the ends of the two groups of massage arms B2 away from the massage head B3 are respectively rotatably mounted on the two annular grooves B11. Both side walls of the annular groove B11 are inclined relative to the center line of the first rotating shaft B1, that is, an angle r is formed between the center line of the annular groove B11 and the center line of the first rotating shaft B1, and both sides of the massage arm B2 close to one end of the first rotating shaft B1 are in sliding contact with the side walls of the annular groove B11. The first driving mechanism C drives the first rotating shaft B1 to rotate, and can force the massage arm B2 to swing back and forth along the axis of the first rotating shaft B1 under the transmission action of the inclined side walls of the annular groove B11, so that the massage head B3 at the far end forms a kneading massage. Figure 6 It can be seen that a second driving mechanism D is also provided on the support plate 2, and the second driving mechanism D is used to drive the massage arm B2 to swing back and forth within a certain range, so that the massage head B3 at the far end can perform a percussion massage.

[0043] Based on the above structural design, the mechanical waist and back massage assembly has at least two massage functions of kneading and tapping. Among them, the working principle of the kneading massage is as follows: after the device is integrated into the seat back, a surface cover is provided on the surface of the backrest. When the kneading massage device is working, the first driving mechanism C drives the first rotating shaft B1 to rotate and transmits it to the massage arm B2. Since the massage head B3 at the far end of the massage arm B2 will be subject to the resistance of the seat cover or the user's back, the massage arm B2 cannot make a circular motion around the first rotating shaft B1, and the massage head B3 will continuously act on the user's back. In addition, the inclined side wall of the annular groove B11 and the side wall of the massage arm B2 form an inclined cam transmission, so the rotation of the first rotating shaft B1 can force the massage arm B2 to swing back and forth along the axis of the first rotating shaft B1, that is, the massage arm B2 can swing left and right, so that the massage head B3 at the far end forms a reciprocating swing kneading massage on the user's back, which has the advantage of good massage effect. In this embodiment, since the two groups of massage arms B2 are symmetrically arranged, the swing trajectories of the two massage heads B3 are also symmetrical along the user's spine, ensuring the consistency of the meridian massage on both sides of the spine and improving the comfort of the massage.

[0044] The working principle of the percussion massage is as follows: when the user needs the massage head B3 to perform a percussion massage, the second drive mechanism D drives the two sets of massage arms B2 to swing back and forth toward the front side of the backrest, that is, the user's waist and back, which can drive the massage head B3 at the far end of the two sets of massage arms B2 to perform reciprocating percussion massage on the user's back, so that the meridians on both sides of the user's back spine can be relaxed. Such a structural design can achieve two massage functions by setting two sets of massage arms B2 and massage heads B3, and has the technical advantages of simple structure, compactness and rich functions.

[0045] Further, refer to Figure 4 As shown, the mounting base plate 1 is provided with a third driving mechanism E, which can drive the support plate 2 to move up and down along the height direction of the mounting base plate 1. When the massage head B3 performs kneading or tapping massage on the user's waist and back, the third driving mechanism E drives the support plate 2 to move up and down, which can drive the two massage heads B3 to move up and down along the meridians on both sides of the user's back spine, thereby simulating the massage function of walking kneading or walking tapping, further enriching the function of the device and improving the massage effect. In addition, the first driving mechanism C and the second driving mechanism D work at the same time, and then cooperate with the lifting drive of the third driving mechanism E, so that the two massage heads B3 can perform walking kneading and tapping massage actions on the user's back, and the massage function is further upgraded.

[0046] Please refer to Figure 4, the third driving mechanism E includes a linear driving unit E1 arranged at the left end of the mounting base plate 1, and a guide assembly E2 arranged at the right end. The linear driving unit E1 can drive the support plate 2 to move up and down, and the guide assembly E2 can guide the support plate 2 to move up and down, so that the support plate 2 can move up and down on the mounting base plate 1 more smoothly. The advantage of this design is that by arranging the linear driving unit E1 and the guide assembly E2 at both ends, an installation space can be reserved for the middle part of the support plate 2 to facilitate the installation of massage components. It has the advantages of reasonable and compact layout, which helps the product to be integrated into the seat back in a thinner and more compact manner. Specifically, the linear driving unit E1 includes a first screw rod E11 extending along the height direction of the mounting base plate 1, a nut sleeve E12 sleeved on the first screw rod E11, and a first motor E13 that drives the nut sleeve E12 to rotate, wherein the first screw rod E11 is located at the left end of the mounting base plate 1. Both ends of the first screw rod E11 are fixedly supported on the mounting base plate 1 by a support seat. The first motor E13 is fixedly mounted on the support plate 2. The first motor E13 drives the nut sleeve E12 to rotate, which can drive the nut sleeve E12 to move up and down along the axial spiral of the first screw rod E11, thereby driving the first motor E13 and the support plate 2 to move up and down as a whole. The guide assembly E2 includes a guide rail E21 fixedly mounted on the right end of the mounting base plate 1. The guide rail E21 extends along the height direction of the mounting base plate 1. A first roller (not shown in the figure) is provided at the bottom of the support plate 2 corresponding to the guide rail E21. The first roller is in sliding contact with the bottom of the guide rail.

[0047] like Figure 5 and 7 As shown, the first rotating shaft B1 includes a central shaft B12 and a sleeve B13 fixedly mounted on the central shaft B12, and an annular groove B11 is formed on the sleeve B13. One end of the massage arm B2 has an annular sleeve hole B21 adapted to the annular groove B11, and the annular sleeve hole B21 is rotatably mounted on the annular groove B11. The first driving mechanism C directly drives the central shaft B12 to rotate, which can drive the sleeve B13 to rotate. The sleeve B13 rotates continuously, and the rotational motion of the two side walls of the annular groove B11 can force the annular sleeve hole B21 to swing back and forth along the axial direction of the central shaft B12, thereby driving the massage head B3 at the far end of the massage arm B2 to swing left and right.

[0048] Please refer to Figure 6 and 10The second driving mechanism D includes a second rotating shaft D1 disposed on the support plate 2, and a second driving assembly D2 for driving the second rotating shaft D1 to rotate. The second rotating shaft D1 is located below the two groups of massage arms B2. Two transmission sleeves D3 are rotatably mounted on the second rotating shaft D1. The two transmission sleeves D3 are arranged below the two groups of massage arms B2 in a one-to-one correspondence. In this embodiment, the center lines of the two transmission sleeves D3 are eccentrically arranged relative to the center line of the second rotating shaft D1. A connecting rod D4 is provided between the transmission sleeve D3 and the corresponding massage arm B2. One end of the connecting rod D4 is hinged on the transmission sleeve D3, and the other end is hinged on the middle part of the massage arm B2. The second driving assembly D2 drives the second rotating shaft D1 to rotate. Under the eccentric transmission action of the transmission sleeve D3, the connecting rod D4 can drive the corresponding massage arm B2 to swing back and forth within a certain range, thereby realizing the reciprocating percussion massage of the user's back by the massage head B3. In this embodiment, the second driving assembly D2 drives the second rotating shaft D1 to rotate in a motor-directed manner. On the other hand, when the kneading massage function is used, the resistance that prevents the massage arm B2 from making a circular motion around the first rotation axis B1 can also come from the connecting rod D4. The first driving mechanism C drives the first rotation axis B1 to rotate, and can force the massage arm B2 to swing back and forth along the axis of the first rotation axis B1 under the transmission of the inclined side wall of the annular groove B11 and the constraint of the connecting rod D4. In this process, the connecting rod D4 and the massage arm B2 are connected by a ball joint.

[0049] Depend on Fig.10 It can be seen that the eccentric directions of the two groups of eccentric shaft segments D11 relative to the center line of the second rotating shaft D1 are opposite. In the initial state, the center line m of the left eccentric shaft segment D11 is eccentrically set downward relative to the center line n of the second rotating shaft D1, and the center line k of the right eccentric shaft segment D11 is eccentrically set upward relative to the center line n of the second rotating shaft D1. With this design, when the second rotating shaft D1 rotates, the two groups of eccentric shaft segments D11 can drive the two groups of massage arms B2 to swing in different directions, so that the two massage heads B3 form a reciprocating alternating tapping massage on the user's back, which improves the massage experience.

[0050] Please refer to Figure 6 and 11 , the support plate 2 is slidably equipped with a support component B4 and a thrust mechanism F for controlling the sliding of the support component B4, and the second rotation shaft D1 is rotatably sleeved on the support component B4. The sliding of the support component B4 can drive the second rotation shaft D1 to move, thereby driving the massage arm B2 to rotate around its rotation center through the connecting rod D4, so that the massage head B3 moves away from or close to the mounting base B. Based on this, when the massage function is not used, the massage head B3 and the massage arm B2 are stored in the backrest, that is, the position of the massage head B3 closer to the support plate 2 is referred to as Figure 4, it avoids the massage head B3 protruding from the backrest and causing discomfort to the user's waist, ensuring the comfort of normal riding. When the user needs to use the massage head B3 for percussion massage, the support component B4 slides and drives the massage arm B2 to rotate outward, so that the massage head B3 at the far end of the massage arm B2 can be pushed out to the front side of the backrest and act on the occupant's waist and back. Thereafter, the second drive component D2 drives the second rotating shaft D1 to rotate, so that the far end massage head B3 can form a reciprocating swing percussion massage on the user's back. After the massage is finished, the thrust mechanism F drives the support component B4 to slide, so that the massage arm B2 rotates toward the direction close to the support plate 2, so that the massage head B3 can be retracted toward the support plate 2. In addition, by controlling the angle of the massage arm B2 to rotate outward, the percussion massage depth of the massage head B3 can also be adjusted to ensure that users of all body types can get effective massage. The principle of using the kneading massage function is similar. First, the massage head B3 is pushed out to the front side of the backrest, and then the kneading massage is performed. It will not be repeated here.

[0051] Re-attend Figure 8 and 9 The thrust mechanism F includes a limit block F2 abutting against the support component B4, and a first driving assembly F3 driving the limit block F2 to move along the sliding direction of the support component B4. An elastic element F1 is provided between the support plate 2 and the support component B4, and the elastic element F1 exerts a force to make the support component B4 abut against the limit block F2. When the massage head B3 is pressed by an external force, the support component B4 can overcome the resistance of the elastic element F1 and slide, so that the massage head B3 moves toward the support plate 2. With such a design, when the user needs to use the massage head B3 for massage, the first drive assembly F3 drives the limit block F2 to move away from the support component B4. During this process, since the elastic element F1 exerts a force that causes the support component B4 to continuously abut against the limit block F2, the support component B4 can move synchronously with the limit block F2, driving the second rotation axis D1 to move synchronously, thereby being able to drive the massage arm B2 to rotate outward relative to the first rotation axis B1 under the linkage action of the connecting rod D4, so that the massage head B3 at the far end of the massage arm B2 can be pushed out to the front side of the backrest A. After the massage is finished, the first drive assembly F3 drives the limit block F2 to move toward the support component B4. At this time, the limit block F2 pushes the support component B4 to overcome the resistance of the elastic element F1 and slide, thereby being able to drive the massage arm B2 to rotate inward under the linkage action of the connecting rod D4, so that the massage head B3 is retracted toward the support plate 2.

[0052] Under such a structural design, the massage head B3 also has a passive collapse function in the working state. The specific process is as follows: when the massage head B3 is in the working state, when the vehicle collides or other emergencies occur, and the massage head B3 is compressed by external force, the support component B4 can overcome the resistance of the elastic element F1 and drive the second rotating shaft D1 to slide. Under the linkage action of the connecting rod D4, the massage head B3 can be driven to quickly retract toward the support plate 2, effectively avoiding the massage head B3 from causing harm to the human body and improving the safety of the massage. When the external force disappears, the elastic element F1 resets, which can push the support component B4 to slide, and then drive the massage arm B2 and the massage head B3 to automatically return to the working state. Such a design can protect the massage head B3 from damage, save costs and eliminate the trouble of replacing parts, and has the advantage of good practicality.

[0053] The elastic element F1 may be a compression spring, a tension spring, a torsion spring, a leaf spring, a spring sheet, etc. In this embodiment, the elastic element F1 is a compression spring. Figure 8 and 9 , the compression spring abuts between the support component B4 and the lower end of the support plate 2, and the limit block F2 moves downward along the height direction of the support plate 2, that is, moves in the direction close to the compression spring, which can push the support component B4 downward to compress the compression spring, so as to force the compression spring to store force, and the support component B4 moves downward, which can drive the massage arm B2 to rotate toward the support plate 2 through the connecting rod D4. When the limit block F2 moves in the direction away from the support component B4, that is, moves upward, the elastic potential energy of the compression spring can be released, and the thrust generated by the compression spring can make the support component B4 move synchronously with the limit block F2, so as to drive the massage arm B2 to rotate outward through the connecting rod D4. In this state, when the massage head B3 is compressed by external force, the support component B4 can squeeze the compression spring downward, and then drive the massage arm B2 to quickly retract toward the support plate 2 through the connecting rod D4; when the external force disappears, the compression spring can release energy and push the support component B4 to move upward until the support component B4 abuts against the limit block F2. At this time, the massage arm B2 returns to the working position and the massage head B3 is not damaged by external force.

[0054] like Figure 7 and 8 As shown, a guide rod F4 extending in the height direction is fixedly provided on the support plate 2, and the elastic element F1, the support component B4 and the limit block F2 are sequentially mounted on the guide rod F4 from bottom to top, and the support component B4 and the limit block F2 can slide up and down relative to the guide rod F4. Such a design ensures the reliability of the installation and movement of the elastic element F1, the support component B4 and the limit block F2.

[0055] For example Figure 7 and 8As shown, the first drive assembly F3 includes a second motor F31 fixed on the support plate 2 and a second screw rod F32 driven to rotate by the second motor F31, the second screw rod F32 extends along the height direction of the support plate 2, the limit block F2 is threadedly mounted on the second screw rod F32, and the second motor F31 drives the second screw rod F32 to rotate, that is, it can drive the limit block F2 to move along the second screw rod F32. In order to ensure the compactness of the overall structure and the uniformity of the force on the support component B4, the number of guide rods F4 is provided in two groups, and the two groups of guide rods F4 are symmetrically arranged along the width direction of the support plate 2, and the second screw rod F32 is located between the two groups of guide rods F4. Both groups of guide rods F4 are mounted with elastic elements F1, and both ends of the limit block F2 and both ends of the support component B4 are respectively slidably connected to the two guide rods F4. The second motor F31 drives the limit block F2 to move downward, which can drive the support component B4 to squeeze the two sets of elastic elements F1 at the same time, and then drive the two sets of massage arms B2 to retract inward, ensuring the synchronization of the movement of the two sets of massage arms B2.

[0056] In addition to being able to achieve massage functions such as kneading and tapping, the mechanical waist and back massage assembly provided in this embodiment can also simulate walking massage, as follows: the support component B4 slides to drive the massage arm B2 to rotate outward, so that the massage head B3 at the far end of the massage arm B2 can be pushed out to the front side of the backrest and act on the occupant's waist and back. The third drive mechanism E drives the support plate 2 to move up and down along the mounting base plate 1, which can drive the massage head B3 to move up and down along the meridians on both sides of the user's back spine, thereby simulating the massage function of walking massage.

[0057] Please refer to Fig.12 The mechanical back massage assembly also includes a support plate B5 disposed in the seat back, the support plate B5 is located in front of the mounting base B, and the two groups of massage arms B2 are arranged between the mounting base B and the support plate B5 in the vertical direction. An opening B51 is provided in the middle of the support plate B5, and the width of the opening B51 is adapted to the minimum spacing between the two groups of massage arms B2 and the massage head B3. Fig.13 The first driving mechanism C drives the first rotating shaft B1 to rotate, and can force the massage arm B2 to swing back and forth along the axial direction of the first rotating shaft B1 under the transmission of the inclined side wall of the annular groove B11 and the restraining effect of the connecting rod D4. After the distance between the two groups of massage arms B2 is widened, the thrust mechanism F drives the supporting component B4 to slide, and can drive the massage arm B2 to rotate around the first rotating shaft B1 through the connecting rod D4, so that the massage head B3 can push the support plate B5 to move forward relative to the mounting base B. In this embodiment, the support plate B5 is a flexible plastic plate, and its upper end is fixedly connected to the upper end of the support plate 2.

[0058] The advantage of this design is that, in addition to being able to realize a variety of massage functions, the device also has a lumbar support function, specifically: when using the lumbar support, first, the first drive mechanism C drives the first rotating shaft B1 to rotate and transmits it to the massage arm B2. The inclined side wall of the annular groove B11 and the side wall of the massage arm B2 form an inclined cam transmission. In addition, the restraining effect of the connecting rod D4, so the rotation of the first rotating shaft B1 can force the massage arm B2 to swing back and forth along the axis of the first rotating shaft B1, that is, the massage arm B2 can swing left and right, thereby driving the massage head B3 to swing left and right. Since the two annular grooves B11 are symmetrically arranged, the swinging trajectories of the two massage heads B3 are also symmetrical to each other, that is, the two massage heads B3 can approach and move away from each other. After the distance between the two massage heads B3 is increased, the support component B4 slides upward, driving the two groups of massage arms B2 to rotate outward, so that the two massage heads B3 push the support plate B5 to the front side, thereby providing auxiliary support for the waist of the occupant.

[0059] When using the massage function, taking kneading massage as an example, the first drive mechanism C drives the first rotating shaft B1 to rotate a certain angle to adjust the distance between the two massage heads B3 to the minimum, and the support component B4 slides upward, driving the two groups of massage arms B2 to rotate outward, thereby driving the two massage heads B3 to pass through the opening B51 forward, and then the first drive mechanism C drives the first rotating shaft B1 to rotate and transmits it to the massage arm B2, so that the two massage heads B3 can perform kneading massage on the user's waist and back. Conversely, after the massage is finished, the distance between the massage heads B3 is first adjusted to the minimum, and then retracted to a position close to the support plate 2 through the opening B51.

[0060] like Figure 1 and 2 As shown, the backrest A includes a backrest foam A1, and a sinking area A11 is provided on the front surface of the backrest foam A1. The sinking area A11 is provided with two groups of strip-shaped through grooves A12 extending along the height direction of the backrest. Figure 3As shown, a wear-resistant cloth A2 is provided on the front side of the back foam A1, and the wear-resistant cloth A2 includes a covering layer A21 covering the surface of the back foam A1, and a telescopic layer A22 is provided on the rear side of the covering layer A21, and the telescopic layer A22 is arranged in a folded manner in the sinking area A11. The mechanical waist and back massage assembly is installed on the rear side of the back foam A1, and the two groups of massage arms B2 correspond one to one with the two groups of strip grooves A12. When the mechanical waist and back massage assembly is not in operation, the massage arms B2 are stored in the strip grooves A12 and will not press against the inner side of the wear-resistant cloth A2. At this time, the covering layer A21 can be ensured to be in a flat state, and the user can lean on the chair back normally with good comfort and no discomfort. When the massage function is enabled, the massage arm B2 rotates relative to the first rotating shaft B1, and the massage head B3 at its far end can extend into the corresponding strip-shaped through groove A12 and act on the wear-resistant cloth A2. When the wear-resistant cloth A2 is pushed outward by the massage head B3, the telescopic layer A22 can be forced to stretch outward so that the wear-resistant cloth A2 can bulge outward adaptively without any feeling of pulling, thereby ensuring that the massage arm B2 can stably perform massage tasks such as kneading, tapping and massaging.

[0061] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A mechanical waist and back massage assembly, characterized in that: The invention comprises a mounting base (B) for being assembled in a seat back, the mounting base (B) being provided with a first rotating shaft (B1) and a first driving mechanism (C) for driving the first rotating shaft (B1) to rotate, two groups of massage arms (B2) being rotatably mounted on the first rotating shaft (B1), the two groups of massage arms (B2) being arranged along the width direction of the mounting base (B), and massage heads (B3) being provided at one end of the two groups of massage arms (B2) away from the first rotating shaft (B1); Two annular grooves (B11) are provided on the first rotating shaft (B1), one end of the two groups of massage arms (B2) are respectively rotatably sleeved on the two annular grooves (B11), both side walls of the annular grooves (B11) are inclined relative to the center line of the first rotating shaft (B1), and both sides of the massage arms (B2) close to one end of the first rotating shaft (B1) are respectively in sliding contact with both side walls of the annular grooves (B11); The first driving mechanism (C) drives the first rotating shaft (B1) to rotate, and can force the massage arm (B2) to swing back and forth along the axial direction of the first rotating shaft (B1) under the transmission effect of the inclined side wall of the annular groove (B11), so that the massage head (B3) at the far end can form a kneading massage; The mounting base (B) is provided with a second driving mechanism (D), which is used to drive the massage arm (B2) to swing back and forth within a certain range relative to the first rotating shaft (B1), so that the massage head (B3) at the far end can perform a percussion massage.

2. The mechanical waist and back massage assembly according to claim 1, characterized in that: The mounting base (B) comprises a mounting base (1) for being assembled inside a seat back, and a support plate (2) slidably connected to the mounting base (1), wherein the support plate (2) slides along the height direction of the mounting base (1), the first rotating shaft (B1), the first driving mechanism (C) and the second driving mechanism (D) are arranged on the support plate (2), and the mounting base (1) is provided with a third driving mechanism (E), which is used to drive the slide seat (2) to slide along the height direction of the mounting base (1).

3. The mechanical waist and back massage assembly according to claim 1, characterized in that: The second driving mechanism (D) comprises a second rotating shaft (D1) arranged below the two groups of massage arms (B2), and a second driving assembly (D2) for driving the second rotating shaft (D1) to rotate; two transmission sleeves (D3) are rotatably mounted on the second rotating shaft (D1); the center lines of the two transmission sleeves (D3) are eccentrically arranged relative to the center line of the second rotating shaft (D1); and the two transmission sleeves (D3) correspond to the two groups of massage arms (B2) one by one; a connecting rod (D4) is arranged between the transmission sleeve (D3) and the corresponding massage arm (B2); one end of the connecting rod (D4) is hinged to the transmission sleeve (D3), and the other end is hinged to the middle of the massage arm (B2); The second driving component (D2) drives the second rotating shaft (D1) to rotate, and can drive the massage arm (B2) to swing back and forth within a certain range under the eccentric transmission action of the transmission sleeve (D3).

4. The mechanical waist and back massage assembly according to claim 3, characterized in that: The eccentric directions of the two transmission sleeves (D3) are opposite.

5. The mechanical waist and back massage assembly according to claim 1, characterized in that: The first rotating shaft (B1) comprises a central shaft (B12) and a sleeve (B13) fixedly sleeved on the central shaft (B12); the annular groove (B11) is provided on the sleeve (B13); one end of the massage arm (B2) has an annular sleeve hole (B21) adapted to the annular groove (B11); the annular sleeve hole (B21) is rotatably sleeved on the annular groove (B11).

6. The mechanical waist and back massage assembly according to claim 3, characterized in that: The mounting base (B) is slidably equipped with a support component (B4) and a thrust mechanism (F) for controlling the sliding of the support component (B4); the second rotating shaft (D1) is rotatably sleeved on the support component (B4); the support component (B4) slides and can drive the massage arm (B2) to rotate around the first rotating shaft (B1) via the connecting rod (D4), so that the massage head (B3) moves in a direction away from or close to the mounting base (B).

7. The mechanical waist and back massage assembly according to claim 6, characterized in that: The thrust mechanism (F) comprises a limit block (F2) abutting against the support component (B4) and a first driving assembly (F3) driving the limit block (F2) to move along the sliding direction of the support component (B4); an elastic element (F1) is provided between the device base (B) and the support component (B4), and the elastic element (F1) exerts a force that causes the support component (B4) to abut against the limit block (F2); When the massage head (B3) is pressed by an external force, the support component (B4) can overcome the resistance of the elastic element (F1) and slide, so that the massage head (B3) moves toward the mounting base (B).

8. The mechanical waist and back massage assembly according to claim 6, characterized in that: The invention also comprises a support plate (B5) for being arranged in the seat back, the support plate (B5) being located in front of the mounting base (B), and the two groups of massage arms (B2) being arranged between the mounting base (B) and the support plate (B5) in a vertical direction, and an opening (B51) being provided in the middle of the support plate (B5), and the width of the opening (B51) being adapted to the minimum spacing between the two groups of massage arms (B2) and the massage head (B3); The first driving mechanism (C) drives the first rotating shaft (B1) to rotate, and can force the massage arm (B2) to swing back and forth along the axial direction of the first rotating shaft (B1) under the transmission of the inclined side wall of the annular groove (B11) and the restraining action of the connecting rod (D4). After the distance between the two groups of massage arms (B2) is widened, the thrust mechanism (F) drives the supporting component (B4) to slide, and can drive the massage arm (B2) to rotate around the first rotating shaft (B1) through the connecting rod (D4), so that the massage head (B3) can push the support plate (B5) to move forward relative to the mounting base (B).

9. A car seat, characterized in that: It comprises a backrest (A), wherein the mechanical waist and back massage assembly according to any one of claims 1 to 8 is integrated and installed inside the backrest (A).

10. The vehicle seat according to claim 9, characterized in that: The backrest (A) comprises a backrest foam (A1), a sinking area (A11) is provided on the front surface of the backrest foam (A1), the sinking area (A11) is provided with two groups of strip-shaped through grooves (A12) extending along the height direction of the backrest, a wear-resistant cloth (A2) is provided on the front side of the backrest foam (A1), the wear-resistant cloth (A2) comprises a covering layer (A21) covering the surface of the backrest foam (A1), a telescopic layer (A22) is provided on the rear side of the covering layer (A21), and the telescopic layer (A22) is arranged in the sinking area (A11) in a folded manner; The mechanical waist and back massage assembly is installed on the rear side of the backrest foam (A1), and the two groups of massage arms (B2) correspond to the two groups of strip-shaped through grooves (A12) one by one. The massage arms (B2) rotate relative to the first rotating shaft (B1), and the massage heads (B3) at the far ends thereof can extend into the corresponding strip-shaped through grooves (A12) and act on the wear-resistant cloth (A2). When the wear-resistant cloth (A2) is pushed outward by the massage heads (B3), the telescopic layer (A22) can be forced to extend outward, so that the wear-resistant cloth (A2) can bulge outward.

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