Mechanical waist and back massage device and automobile seat

Abstract

The mechanical waist and back massage device comprises an installation base body, a first rotating shaft and a first driving mechanism for driving the first rotating shaft to rotate are arranged on the installation base body, two sets of massage arms are rotationally installed on the first rotating shaft, and the two sets of massage arms are arranged in the width direction of the installation 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 utility model has the beneficial effects that the massage device has the massage functions of kneading and knocking, and has the advantages of compact structural layout and good massage effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile seat, specifically relates to a mechanical type waist and back massage device and automobile seat. BACKGROUND

[0002] With the progress of science and technology, people's comfort requirements for automobile seats are also constantly improving, therefore, more and more seats begin to be equipped with massage functions to relieve physical fatigue and muscle stiffness caused by long time driving and riding, and improve the comfort of users.

[0003] In the prior art, the massager on the automobile seat is divided into two categories of air bag type massage and mechanical massage, wherein the air bag type massage uses a flexible air bag to act on the user's waist and back area, the massage intensity is low, the massage effect is poor, and it is difficult to fully and deeply relax the user's body. And the mechanical massage device directly acts on the user's back by a rotatable massager, although the massage intensity is greater than that of the air bag type massage, but it has the defects of large size and single massage mode, and there is still a big gap compared with professional massage seats and manual massage.

[0004] Therefore, it is necessary to design a massage mechanism with multiple massage functions to improve the massage effect and enrich the functions of the seat. CONTENT OF THE UTILITY MODEL

[0005] Therefore, one of the purposes of the utility model is to provide a mechanical type waist and back massage device, which has the advantages of compact structure layout and good massage effect.

[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0007] A mechanical type waist and back massage device, the key is that: including the installation base body for assembling to the seat back, the installation base body is equipped with the first rotation shaft and the first drive mechanism for driving the rotation of the first rotation shaft, the first rotation shaft is rotatably installed with two groups of massage arms, two groups of massage arms are arranged along the width direction of the installation base body, and the ends of the two groups of massage arms away from the first rotation shaft are both provided with massage heads;

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

[0009] The first drive mechanism drives the rotation of the first rotation shaft, which can make the massage arm reciprocate along the axial direction of the first rotation shaft under the transmission action of the inclined side wall of the annular groove, so that the massage head at the distal end forms kneading massage;

[0010] A second driving mechanism is provided on the mounting base, and the second driving mechanism 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-mentioned structure, the device is integrated into a seat backrest with a cover on the backrest surface. When the kneading massage device is in operation, the first drive mechanism rotates the first rotating shaft and transmits power to the massage arms. Because the massage heads at the distal ends of the massage arms encounter resistance from the seat cover or the user's back, the massage arms are unable to follow the circular motion around the first rotating shaft, and the massage heads continuously act on the user's back. Furthermore, the inclined sidewalls of the annular groove and the sidewalls of the massage arms form an inclined cam transmission. Therefore, the rotation of the first rotating shaft forces the massage arms to swing back and forth along the axis of the first rotating shaft, i.e., the massage arms can swing left and right, thereby causing the distal massage heads to perform a reciprocating kneading massage on the user's back. The second drive mechanism drives the two sets of massage arms to swing back and forth toward the front of the backrest, i.e., the user's waist and back, thereby driving the massage heads at the distal ends of the two sets of massage arms to perform a reciprocating percussion massage on the user's back.

[0012] Preferably, the mounting base includes a mounting base for assembly inside a seat back, and a support plate slidably connected to the mounting base, the support plate slides along the height direction of the mounting base, 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, the third driving mechanism is used to drive the support plate to slide along the height direction of the mounting base.

[0013] Preferably, the second driving mechanism includes a second rotating shaft disposed below the two groups of massage arms, and a second driving assembly that drives the second rotating shaft to rotate, two transmission sleeves being rotatably mounted on the second rotating shaft, the center lines of the two transmission sleeves being eccentrically disposed relative to the center line of the second rotating shaft, and the two transmission sleeves corresponding one to one to the two groups of massage arms, a connecting rod being provided between the transmission sleeves and the corresponding massage arms, one end of the connecting rod being hinged to the transmission sleeve, and the other end being 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 includes 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] As preferred: the installation base is slidably equipped with a support component and a thrust mechanism for controlling the sliding of the support component, and the second rotating shaft is rotatably sleeved on the support component; the support component slides and can drive the massage arms to rotate around the first rotating shaft through the connecting rod, so that the massage heads move away from or close to the installation base.

[0018] As preferred: the thrust mechanism comprises a limiting block abutting against the support component and a first driving assembly for driving the limiting block to move along the sliding direction of the support component, and an elastic element is arranged between the installation base and the support component, and the elastic element applies a force for abutting the support component against the limiting block; when the massage head is pressed by an external force, the support component can slide against the resistance of the elastic element, so that the massage head moves towards the installation base.

[0019] As preferred: the utility model further comprises a supporting plate arranged in the seat back, the supporting plate is located at the front side of the installation base, and the two groups of massage arms are arranged between the installation base and the supporting plate in the vertical direction, and the middle part of the supporting plate is provided with an opening, and the opening width is adapted to the minimum spacing of the two groups of massage arms and the massage heads.

[0020] The first driving mechanism drives the first rotating shaft to rotate, can force the massage arms to reciprocate along the axial direction of the first rotating shaft under the transmission of the inclined side wall of the annular groove and the constraint of the connecting rod, and after the spacing between the two groups of massage arms is widened, the thrust mechanism drives the support component to slide, can drive the massage arms to rotate around the first rotating shaft through the connecting rod, so that the massage heads can push the supporting plate to move forward relative to the installation base.

[0021] The second purpose of the utility model is to provide a car seat, and the key lies in: comprising a backrest, the backrest is internally integrated with the above-mentioned mechanical waist and back massager.

[0022] As preferred: the backrest comprises a backrest foam, the front side surface of the backrest foam is provided with a sunken area, the sunken area is provided with two groups of strip-shaped through grooves extending along the height direction of the backrest, the front side of the backrest foam is provided with wear-resistant cloth, the wear-resistant cloth comprises a covering layer covering the surface of the backrest foam, the rear side of the covering layer is provided with an elastic layer, and the elastic layer is arranged in the sunken area in a folding mode.

[0023] The mechanical waist and back massager is installed at 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, the massage heads at the distal ends of the massage arms can extend into the corresponding strip-shaped through grooves and act on the wear-resistant cloth, when the wear-resistant cloth is subjected to the outward thrust of the massage heads, the elastic layer can be forced to expand outward, so that the wear-resistant cloth can protrude outward.

[0024] Compared with the prior art, the utility model has the advantages that:

[0025] 1. The mechanical waist and back massaging device has the technical advantages of simple structure, compactness and rich functions, by controlling the movement of the two groups of massaging arms, the distal massaging head can perform knocking massage or kneading massage on the user's back.

[0026] 2. The mechanical waist and back massaging device can realize fixed-point kneading, fixed-point knocking, walking kneading, walking knocking and walking massage functions, and has a waist support function, which improves the user's experience and comfort, and through reasonable and compact structure layout, the device can be integrated in the backrest in a thinner and more compact manner.

[0027] 3. The mechanical waist and back massaging device can realize the recoverable collapse of the massaging arms and the massaging head when the vehicle collides or other sudden conditions occur in the use state of the waist support or massaging function, ensuring the safety of the massaging and waist support use. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic view of the mechanical waist and back massaging device integrated in the backrest A;

[0029] Figure 2 is a structural schematic view of the backrest foam A1;

[0030] Figure 3 is a structural schematic view of the wear-resistant cloth A2;

[0031] Figure 4 is a structural schematic view of the mechanical waist and back massaging device;

[0032] Figure 5 is a partial sectional view of the first rotating shaft B1;

[0033] Figure 6 is a structural schematic view of the mechanical waist and back massaging device in the use state;

[0034] Figure 7 is another structural schematic view of the mechanical waist and back massaging device in the use state;

[0035] Figure 8 is a sectional view of the mechanical waist and back massaging device in the non-use state;

[0036] Figure 9 is a sectional view of the mechanical waist and back massaging device in the use state;

[0037] Figure 10 is a structural schematic view of the second rotating shaft D1;

[0038] Figure 11A schematic view showing the positional relationship between the support component B4 and the thrust mechanism F;

[0039] Figure 12 A front view of the mechanical waist and back massage device (with a support plate B5 connected);

[0040] Figure 13 A schematic view of the mechanical waist and back massage device when a waist support is used. DETAILED DESCRIPTION

[0041] The utility model will be further described below in combination with the embodiments and the drawings.

[0042] As shown in Figure 1 , an automobile seat comprises a backrest A, and a mechanical waist and back massage device is integrally installed inside the backrest A. As shown in Figure 4 , the mechanical waist and back massage device comprises a mounting base B, which, in this embodiment, comprises a mounting bottom plate 1 and a support plate 2 slidingly assembled on the mounting bottom plate 1. The mounting bottom plate 1 is assembled inside the seat backrest A, and the support plate 2 can slide along the height direction of the mounting bottom plate 1. As shown in FIG. 7, a first rotating shaft B1 and a first driving mechanism C for driving the first rotating shaft B1 to rotate are rotationally arranged on the support plate 2. Two groups of massage arms B2 are rotationally 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. Each of the two groups of massage arms B2 is provided with a massage head B3 at the end away from the first rotating shaft B1. In this embodiment, the massage head B3 is a massage roller. As shown in Figure 5 and Figure 7 , two annular grooves B11 are arranged 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 rotationally sleeved on the two annular grooves B11. The two side walls of the annular groove B11 are arranged to be inclined relative to the center line of the first rotating shaft B1, that is, an included angle r is formed between the center line of the annular groove B11 and the center line of the first rotating shaft B1, and the two sides of the end of the massage arm B2 close to the first rotating shaft B1 are respectively in sliding contact with the two side walls of the annular groove B11. The first driving mechanism C drives the first rotating shaft B1 to rotate, which can force the massage arm B2 to reciprocally swing along the axial direction 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 distal end forms kneading massage. Figure 6 As can be seen, a second driving mechanism D is further arranged on the support plate 2, and the second driving mechanism D is used to drive the massage arm B2 to reciprocally swing within a certain range, so that the massage head B3 at the distal end forms knocking massage.

[0043] Based on the above structural design, the mechanical waist and back massager has at least kneading and knocking two kinds of massage functions, wherein the working principle of kneading massage is as follows: after the device is integrated in the seat back, the surface layer of the back is provided with a surface cover, when the kneading massage device works, the first driving mechanism C drives the first rotating shaft B1 to rotate and drives the massage arm B2, because the massage head B3 at the far end of the massage arm B2 will be resisted by the seat surface cover or the user's back, therefore the massage arm B2 cannot rotate with the first rotating shaft B1, 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 a cam transmission, so that the rotation of the first rotating shaft B1 can force the massage arm B2 to reciprocatingly swing along the axial direction 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 kneading massage on the user's back, and has the advantage of good massage effect. In the embodiment, because the two groups of massage arms B2 are symmetrically arranged, the swing tracks of the two massage heads B3 are also symmetrically arranged along the user's spine, so that the consistency of the meridians on both sides of the spine is ensured, and the comfort of the massage is good.

[0044] The working principle of knocking massage is as follows: when the user needs to knock massage by the massage head B3, the second driving mechanism D drives the two groups of massage arms B2 to swing back and forth towards the front side of the back, that is, the user's waist and back, that is, the massage head B3 at the far end of the two groups of massage arms B2 can reciprocatingly knock massage on the user's back, so that the meridians on both sides of the user's back spine can be relaxed. Such structural design can realize two kinds of massage functions by arranging two groups of massage arms B2 and massage heads B3, and has the technical advantages of simple structure, compactness and rich functions.

[0045] Further, referring to Fig. 1, Figure 4 It is shown that the third driving mechanism E is arranged on the mounting bottom plate 1, and the third driving mechanism E can drive the support plate 2 to move up and down along the height direction of the mounting bottom plate 1. When the massage head B3 kneads or knocks 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, so as to simulate the walking kneading or walking knocking massage function, further enrich the function of the device, and improve the massage effect. In addition, the first driving mechanism C and the second driving mechanism D work at the same time, and the third driving mechanism E is driven to move up and down, so that the two massage heads B3 can perform walking kneading and knocking massage on the user's back, and the massage function is further upgraded.

[0046] Please refer to Figure 4The third driving mechanism E includes a linear driving unit E1 arranged at the left end of the mounting bottom 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 moves up and down on the mounting bottom 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, a mounting space can be reserved in the middle of the support plate 2 to facilitate the installation of the massage component, which has the advantages of reasonable layout and compactness, and helps the product to be integrated in 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 bottom plate 1, a nut sleeve E12 sleeved on the first screw rod E11, and a first motor E13 driving the nut sleeve E12 to rotate, wherein the first screw rod E11 is located at the left end of the mounting bottom plate 1. The first screw rod E11 is fixedly supported on the mounting bottom plate 1 through a support seat at both ends. The first motor E13 is fixedly installed on the support plate 2, and 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 first screw rod E11 in the axial direction, thereby enabling 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 arranged at the right end of the mounting bottom plate 1, which extends along the height direction of the mounting bottom plate 1. The support plate 2 is provided with a first roller (not shown in the figure) corresponding to the position of the guide rail E21 at the bottom. The first roller is in sliding contact with the bottom of the guide rail.

[0047] As shown in Figure 5 and 7 , the first rotating shaft B1 includes a central shaft B12 and a sleeve B13 fixedly sleeved on the central shaft B12, and the annular groove B11 is formed in the sleeve B13. The massage arm B2 has an annular sleeve hole B21 at one end, which is rotatably sleeved 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 continuous rotation of the sleeve B13 can force the two side walls of the annular groove B11 to rotate, which can make the annular sleeve hole B21 reciprocate along the central shaft B12 in the axial direction, thereby driving the massage head B3 at the distal end of the massage arm B2 to swing left and right.

[0048] Please refer to Figure 6 and 10, the second driving mechanism D comprises a second rotating shaft D1 arranged on the support plate 2 and a second driving assembly D2 for driving the second rotating shaft D1 to rotate, and the second rotating shaft D1 is located below the two groups of massage arms B2. Two transmission sleeves D3 are rotatably sleeved on the second rotating shaft D1, and the two transmission sleeves D3 are arranged below the two groups of massage arms B2 in a one-to-one correspondence. In the 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 arranged between the transmission sleeve D3 and the corresponding massage arm B2, one end of the connecting rod D4 is hingedly connected to the transmission sleeve D3, and the other end is hingedly connected to the middle of the massage arm B2. The second driving assembly D2 drives the second rotating shaft D1 to rotate, and under the eccentric transmission action of the transmission sleeve D3, the connecting rod D4 can drive the corresponding massage arm B2 to reciprocatingly swing within a certain range, so that the massage head B3 realizes reciprocating percussive massage on the back of the user. In the embodiment, the second driving assembly D2 drives the second rotating shaft D1 to rotate in a motor direct drive manner. On the other hand, when the kneading massage function is used, the resistance that hinders the massage arm B2 from performing the circular motion around the first rotating shaft B1 can also come from the connecting rod D4. The first driving mechanism C drives the first rotating shaft B1 to rotate, and under the transmission of the inclined side wall of the annular groove B11 and the constraint action of the connecting rod D4, the massage arm B2 is forced to reciprocatingly swing along the first rotating shaft B1. In this process, the connecting rod D4 and the massage arm B2 are connected by a spherical hinge.

[0049] By Figure 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, and in the initial state, the center line m of the left eccentric shaft segment D11 is arranged eccentrically 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 arranged eccentrically upward relative to the center line n of the second rotating shaft D1. In this way, 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 reciprocating and alternating percussive massage on the back of the user, thereby improving the experience of massage.

[0050] Please refer to Figure 6 And 11 , the support plate 2 is slidably provided with a support component B4 and a thrust mechanism F for controlling the sliding of the support component B4, and the second rotating shaft D1 is rotatably sleeved on the support component B4. The support component B4 slides to drive the second rotating shaft D1 to move, so that the massage arm B2 can be driven to rotate around the rotating center thereof through the connecting rod D4, so that the massage head B3 moves away from or approaches the mounting base B. Based on this, when the massage function is not used, the massage head B3 and the massage arm B2 are accommodated in the backrest, that is, the massage head B3 is closer to the position of the support plate 2. Please refer to Figure 4, avoid the massage head B3 protruding from the back to the user's waist caused by the sense of discomfort, to ensure the comfort of normal ride. When the user needs to use the massage head B3 for knocking massage, the support component B4 slides to drive the massage arm B2 to rotate outward, so that the massage head B3 at the distal end of the massage arm B2 can be pushed out to the front side of the backrest, and act on the passenger's waist and back. Thereafter, the second drive assembly D2 drives the second rotating shaft D1 to rotate, that is, the distal end of the massage head B3 can form reciprocating swing knocking 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 towards the support plate 2 direction, so that the massage head B3 can be retracted towards the support plate 2 direction. In addition, by controlling the angle of the massage arm B2 rotating outward, the knocking massage depth of the massage head B3 can also be adjusted to ensure that users of various body types can receive effective massage. The principle of using kneading massage function is the same, first push the massage head B3 to the front side of the backrest, and then perform kneading massage, which is not described here.

[0051] Further Figure 8 and 9 , the thrust mechanism F includes a limiting block F2 abutting against the support component B4, and a first drive assembly F3 driving the limiting block F2 to move along the sliding direction of the support component B4. The elastic element F1 is arranged between the support plate 2 and the support component B4, and the elastic element F1 applies a force to make the support component B4 abut against the limiting block F2. When the massage head B3 is pressed by external force, the support component B4 can slide against the resistance of the elastic element F1 to move the massage head B3 towards the support plate 2. In this way, when the user needs to use the massage head B3 for massage, the first drive assembly F3 drives the limiting block F2 to move away from the support component B4. During this process, because the elastic element F1 applies a force to make the support component B4 continuously abut against the limiting block F2, the support component B4 can move synchronously with the limiting block F2, driving the second rotating shaft D1 to move synchronously, so that the massage arm B2 can be driven to rotate outward relative to the first rotating shaft B1 under the linkage action of the connecting rod D4, so that the massage head B3 at the distal 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 limiting block F2 to move towards the support component B4. At this time, the limiting block F2 pushes the support component B4 to slide against the resistance of the elastic element F1, so that the massage arm B2 can be driven to rotate inward under the linkage action of the connecting rod D4, so that the massage head B3 can be retracted towards the support plate 2.

[0052] In the structure design, the massage head B3 has a passive collapse function in the working state. The specific process is as follows: in the working state of the massage head B3, when the vehicle is in a collision or other sudden situation, the massage head B3 is pressed by external force, the supporting part B4 can overcome the resistance of the elastic element F1 to drive the second rotating shaft D1 to slide, and under the linkage action of the connecting rod D4, the massage head B3 can be quickly retracted towards the support plate 2, effectively avoiding the damage of the massage head B3 to the human body, and improving the safety of the massage. When the external force disappears, the elastic element F1 resets to push the supporting part B4 to slide, and then drive the massage arm B2 and the massage head B3 to automatically return to the position of the working state. Such design can protect the massage head B3 from damage, save cost and avoid the trouble of replacing parts, and has the advantages of good practicability.

[0053] The elastic element F1 can be a compression spring, a tension spring, a torsion spring, a leaf spring, a spring plate, etc. In the embodiment, the elastic element F1 is a compression spring. Figure 8 and 9 The compression spring is abutted between the supporting part B4 and the lower end of the support plate 2, the limiting block F2 moves downward along the height direction of the support plate 2, that is, moves towards the compression spring, can push the supporting part B4 to compress the compression spring downward to force the compression spring to store energy, and the supporting part B4 moves downward to drive the massage arm B2 to rotate towards the support plate 2 through the connecting rod D4. When the limiting block F2 moves away from the supporting part B4, that is, moves upward, the elastic potential energy of the compression spring is released, and the thrust generated by the compression spring can drive the supporting part B4 to move synchronously with the limiting 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 pressed by external force, the supporting part B4 can press the compression spring downward, and then drive the massage arm B2 to retract quickly towards the support plate 2 through the connecting rod D4; when the external force disappears, the compression spring can release energy to push the supporting part B4 to move upward until the supporting part B4 abuts against the limiting 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] As shown in Figure 7 and 8, the support plate 2 is fixed with a guide rod F4 extending along the height direction thereof, the elastic element F1, the supporting part B4 and the limiting block F2 are sequentially sleeved on the guide rod F4 from bottom to top, and the supporting part B4 and the limiting block F2 can slide up and down relative to the guide rod F4. Such design ensures the reliability of installation and movement of the elastic element F1, the supporting part B4 and the limiting block F2.

[0055] Again as shown in Figure 7 and 8As shown, the first driving assembly F3 comprises 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 limiting block F2 is threadedly sleeved on the second screw rod F32, and the second motor F31 drives the second screw rod F32 to rotate, that is, can drive the limiting 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 stress of the support component B4, the number of guide rods F4 is two groups, 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. The elastic elements F1 are sleeved on the two groups of guide rods F4, and the two ends of the limiting block F2 and the two ends of the support component B4 are respectively connected with the two guide rods F4 in sliding mode. The second motor F31 drives the limiting block F2 to move downward, which can drive the support component B4 to simultaneously press the two groups of elastic elements F1, and then can drive the two groups of massage arms B2 to retract inward, thereby ensuring the synchronization of the movement of the two groups of massage arms B2.

[0056] In addition to the massage functions such as kneading and knocking, the mechanical waist and back massage device provided in the embodiment can also simulate walking and massage, specifically as follows: the support component B4 slides to drive the massage arm B2 to rotate outward, so that the massage head B3 at the distal end of the massage arm B2 can be pushed out to the front side of the backrest and act on the waist and back of the passenger, and the third driving mechanism E drives the support plate 2 to move up and down along the mounting bottom plate 1, that is, can drive the massage head B3 to move up and down along the meridians on both sides of the user's back, thereby simulating the massage function of walking and massage.

[0057] Please refer to Figure 12 The mechanical waist and back massage device further comprises a supporting plate B5 arranged in the seat backrest, the supporting plate B5 is located on the front side of the mounting base B, and the two groups of massage arms B2 are arranged in a vertical direction between the mounting base B and the supporting plate B5. The middle part of the supporting plate B5 is provided with an opening B51, the width of the opening B51 is adapted to the minimum distance between the two groups of massage arms B2 and the massage head B3. Please refer to Figure 13 The first driving mechanism C drives the first rotating shaft B1 to rotate, which can force the massage arm B2 to reciprocate 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 constraint of the connecting rod D4, and after the distance between the two groups of massage arms B2 is widened, the thrust mechanism F drives the support component B4 to slide, which 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 drive the supporting plate B5 to move forward relative to the mounting base B. In the embodiment, the supporting plate B5 is a flexible plastic plate, and the upper end thereof is fixedly connected with the upper end of the support plate 2.

[0058] The advantage of the design is that the device can realize multiple massage functions and has a waist support function. When the waist support is used, first, the first driving mechanism C drives the first rotating shaft B1 to rotate and drive the massage arms B2. The inclined side wall of the annular groove B11 and the side wall of the massage arm B2 form a bevel cam transmission. In addition, the constraint of the connecting rod D4 is added. Therefore, the rotation of the first rotating shaft B1 can force the massage arm B2 to reciprocate along the axial direction 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 swing trajectories of the two massage heads B3 are also symmetrical with each other, that is, the two massage heads B3 can approach and move away from each other. After adjusting the distance between the two massage heads B3, 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 supporting plate B5 to pop out to the front side, thereby providing auxiliary support to the waist of the passenger.

[0059] When the massage function is used, taking kneading massage as an example, the first driving mechanism C drives the first rotating shaft B1 to rotate by a certain angle, so that the distance between the two massage heads B3 is adjusted to the minimum, 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, then the first driving mechanism C drives the first rotating shaft B1 to rotate and drive the massage arms B2, and the two massage heads B3 can perform kneading massage on the user's waist and back. Conversely, after the massage is finished, first adjust the distance between the massage heads B3 to the minimum, and then retract to the position close to the support plate 2 through the opening B51.

[0060] As shown in Figure 1 and 2 The backrest A includes a backrest foam A1, and the front side surface of the backrest foam A1 is provided with a sunken area A11. The sunken area A11 is provided with two groups of strip-shaped through grooves A12 extending in the height direction of the backrest. In combination with Figure 3As shown, the backrest foam A1 is provided with wear-resistant cloth A2, the wear-resistant cloth A2 comprises a cover layer A21 covering the surface of the backrest foam A1, and the rear side of the cover layer A21 is provided with a stretch layer A22, which is arranged in the sunken area A11 in a folded manner. The mechanical waist and back massage device is installed on the rear side of the backrest foam A1, and two groups of massage arms B2 correspond to two groups of strip-shaped through grooves A12. In the non-working state of the mechanical waist and back massage device, the massage arms B2 are stored in the strip-shaped through grooves A12 and cannot be pressed against the inner side of the wear-resistant cloth A2, at this time, the cover layer A21 can be ensured to be in a flat state, the user can normally lean on the chair back with good comfort and no feeling of strangeness. When the massage function is enabled, the massage arms B2 rotate relative to the first rotating shaft B1, the massage heads B3 at the distal ends of the massage arms B2 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 subjected to the outward thrust of the massage heads B3, the stretch layer A22 can be forced to stretch outward, so that the wear-resistant cloth A2 can be self-adapted to protrude outward and cannot have any pulling feeling, and the massage arms B2 can be ensured to stably perform massage work such as kneading, knocking and pushing.

[0061] Finally, it should be noted that the above description is only the preferred embodiments of the present application, and those skilled in the art can make various similar representations under the inspiration of the present application without departing from the purpose and claims of the present application. Such changes fall within the scope of the present application.

Claims

1. A mechanical back massage device, characterized in that: The application relates to a massage arm device for a seat backrest, which comprises a mounting base (B) arranged in the seat backrest, a first rotating shaft (B1) arranged on the mounting base (B), a first driving mechanism (C) arranged on the mounting base (B) and used for driving the first rotating shaft (B1) to rotate, two groups of massage arms (B2) rotatably arranged on the first rotating shaft (B1), and massage heads (B3) arranged at the ends of the two groups of massage arms (B2) away from the first rotating shaft (B1). Two annular grooves (B11) are arranged on the first rotating shaft (B1), the ends of the two groups of massage arms (B2) are rotatably sleeved on the two annular grooves (B11), the two side walls of the annular grooves (B11) are arranged to be inclined relative to the center line of the first rotating shaft (B1), and the two sides of the end of the massage arm (B2) close to the first rotating shaft (B1) are in sliding contact with the two side walls of the annular grooves (B11). The first driving mechanism (C) drives the first rotating shaft (B1) to rotate, and the massage arms (B2) are forced to reciprocate along the axial direction of the first rotating shaft (B1) under the transmission of the inclined side walls of the annular grooves (B11), so that the massage heads (B3) at the distal ends form kneading massage. A second driving mechanism (D) is arranged on the mounting base (B) and used for driving the massage arms (B2) to reciprocate within a certain range relative to the first rotating shaft (B1), so that the massage heads (B3) at the distal ends form knocking massage.

2. The mechanical back and waist massaging device according to claim 1, characterized in that: The mounting base (B) comprises a mounting bottom plate (1) arranged in the seat backrest and a supporting plate (2) slidably connected to the mounting bottom plate (1), the first rotating shaft (B1), the first driving mechanism (C) and the second driving mechanism (D) are arranged on the supporting plate (2), and a third driving mechanism (E) is arranged on the mounting bottom plate (1) and used for driving the supporting plate (2) to slide along the height direction of the mounting bottom plate (1).

3. The mechanical back and waist massager 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) arranged on the second rotating shaft (D1) and used for driving the second rotating shaft (D1) to rotate, two transmission sleeves (D3) are rotatably sleeved on the second rotating shaft (D1), the center lines of the two transmission sleeves (D3) are arranged to be eccentric relative to the center line of the second rotating shaft (D1), the two transmission sleeves (D3) correspond to the two groups of massage arms (B2) in a one-to-one manner, 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 hingedly connected to the transmission sleeve (D3), and the other end of the connecting rod (D4) is hingedly connected to the middle part of the massage arm (B2). The second driving assembly (D2) drives the second rotating shaft (D1) to rotate, and the massage arms (B2) are driven to reciprocate within a certain range under the eccentric transmission of the transmission sleeves (D3).

4. The mechanical lumbar and back massager of claim 3, wherein: The eccentric directions of the two transmission sleeves (D3) are opposite.

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

6. The mechanical back and waist massager according to claim 3, characterized in that: The mounting base (B) is slidably provided with a supporting component (B4) and a thrust mechanism (F) for controlling sliding of the supporting component (B4), and the second rotating shaft (D1) is rotatably sleeved on the supporting component (B4); the supporting component (B4) is slidable 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) moves away from or approaches the mounting base (B).

7. The mechanical lumbar and back massager of claim 6, wherein: The thrust mechanism (F) comprises a limiting block (F2) abutting against the supporting component (B4) and a first driving assembly (F3) for driving the limiting block (F2) to move along the sliding direction of the supporting component (B4); the mounting base (B) and the supporting component (B4) are provided with an elastic element (F1) which applies a force to make the supporting component (B4) abut against the limiting block (F2); When the massage head (B3) is pressed by an external force, the supporting component (B4) can slide against the resistance of the elastic element (F1) so that the massage head (B3) moves towards the mounting base (B).

8. The mechanical lumbar and back massager of claim 6, wherein: Further comprising a supporting plate (B5) arranged in the seat back, the supporting plate (B5) is located at the front side of the mounting base (B), and the two groups of massage arms (B2) are arranged between the mounting base (B) and the supporting plate (B5) in the vertical direction; the supporting plate (B5) is provided with an opening (B51) in the middle, and the width of the opening (B51) is adapted to the minimum distance 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, which can force the massage arm (B2) to reciprocate 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 constraint 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, which 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 supporting plate (B5) to move forward relative to the mounting base (B).

9. An automotive seat characterized by: The mechanical back massage device comprises a backrest (A), and the backrest (A) is internally integrated with the mechanical back massage device according to any one of claims 1 to 8.

10. The automotive seat of claim 9, wherein: The backrest (A) comprises a backrest foam (A1), the front side surface of the backrest foam (A1) is provided with a sunken area (A11), the sunken area (A11) is provided with two groups of strip-shaped through grooves (A12) extending along the height direction of the backrest, the front side of the backrest foam (A1) is provided with a wear-resistant cloth (A2), the wear-resistant cloth (A2) comprises a covering layer (A21) covering the surface of the backrest foam (A1), the rear side of the covering layer (A21) is provided with an elastic layer (A22), and the elastic layer (A22) is arranged in the sunken area (A11) in a folded manner; The mechanical waist and back massage device is installed at the rear side of the backrest foam (A1), two groups of the massage arms (B2) correspond to two groups of the strip-shaped through grooves (A12) one by one, the massage arms (B2) rotate relative to the first rotating shaft (B1), the massage heads (B3) at the distal ends of the massage arms (B2) 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 subjected to the outward thrust of the massage heads (B3), the elastic layer (A22) can be forced to extend outward, so that the wear-resistant cloth (A2) can be bulged outward.

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