Massage device and automobile seat with same

Abstract

The massage device comprises a mounting base plate, a sliding base sliding in the height direction of the mounting base plate and a first driving mechanism driving the sliding base to do lifting motion are arranged on the mounting base plate, and a rotating support and a second driving mechanism used for driving the rotating support to rotate are rotationally mounted on the sliding base. Two massage heads are arranged at the end, away from the rotating center of the rotating support, of the rotating support and used for acting on meridians and collaterals on the two sides of the spine of the back of a user respectively. The massage chair has the advantages that the waist and back area of a user can be massaged in a massage mode, and the massage effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of seat massage, in particular to a massage device and a car seat with the device. Background Art

[0002] With the advancement of technology, people's requirements for the comfort of car seats are constantly increasing. For car driving, long-term continuous driving will not only cause physical fatigue, but it is also more likely to cause muscle stiffness and fatigue due to maintaining the same posture for a long time, which will have a negative impact on health. Therefore, car seats with massage functions have been launched on the market to relieve passengers' fatigue caused by long-term driving or riding.

[0003] However, currently, most massage institutions targeting the waist and back area on the market use air bag massage, which has low strength and poor massage effect. It is difficult to fully and deeply relax the user's waist and back muscles, and the user's body can never be completely relaxed. Summary of the invention

[0004] In view of this, one of the purposes of the present invention is to provide a massage device that can massage the user's waist and back area in a massage manner and has the advantage of good massage effect.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A massage device, the key of which is to include:

[0007] A mounting base, wherein a slide seat is provided on the mounting base for sliding along a height direction thereof;

[0008] A first driving mechanism, which is used to drive the slide to move up and down along the mounting base plate;

[0009] A rotating bracket is rotatably mounted relative to the slide, and one end of the rotating bracket away from its rotation center is provided with two groups of massage heads, and the two groups of massage heads are respectively used to act on the meridians on both sides of the spine of the user's back; and

[0010] The second driving mechanism is used to drive the rotating bracket to rotate so that the two groups of massage heads can be pushed outward or retracted inward relative to the mounting base plate.

[0011] With the above structure, when the massage function is not used, the massage head and the rotating bracket are stored in the backrest to prevent them from protruding from the backrest and causing discomfort to the user's waist, thereby ensuring normal riding comfort. When the massage function is used, the second drive mechanism drives the rotating bracket to rotate outward so that the massage head at the far end of the rotating bracket can be pushed out to the front of the backrest and act on the occupant's waist and back. The first drive mechanism drives the slide seat to move up and down, that is, it can drive the two massage heads to move up and down along the meridians on both sides of the occupant's back spine, thereby simulating the massage technique of reciprocating massage.

[0012] Preferably: the second driving mechanism includes a support part slidably arranged on a slide seat, and a thrust assembly for controlling the sliding of the support part. The rotating bracket is connected to the support part by a connecting rod, one end of the connecting rod is hinged to the rotating bracket, and the other end is hinged to the support part. The sliding of the support part can drive the rotating bracket to rotate via the connecting rod.

[0013] Preferably, the thrust assembly comprises a limit block abutting against the support portion, and a driving component driving the limit block to move along the sliding direction of the support portion; an elastic element is provided between the slide seat and the support portion, and the elastic element applies a force to make the support portion abut against the limit block; when the massage head is pressed by external force, the support portion can overcome the resistance of the elastic element and slide, so that the massage head moves toward the slide seat.

[0014] Preferably, the elastic element is a compression spring, which abuts between the support portion and the end of the slide seat. The limit block moves in a direction close to the compression spring, which can force the compression spring to store force through the support portion. The limit block moves in a direction away from the support portion, which can release the elastic potential energy of the compression spring. The thrust generated by the compression spring can make the support portion move synchronously with the limit block.

[0015] Preferably, a slide bar extending in the height direction is fixedly disposed on the slide seat, the elastic element, the support portion and the limit block are sequentially mounted on the slide bar in the height direction, and the support portion and the limit block can slide up and down relative to the slide bar.

[0016] Preferably, the rotating bracket comprises two groups of massage head arms symmetrically arranged along the width direction of the slide seat, and the two groups of massage heads are respectively arranged at the ends of the two groups of massage head arms;

[0017] The sliding rods, elastic elements and connecting rods are each provided with two groups, the two groups of sliding rods are symmetrically arranged along the width direction of the sliding seat, the two groups of elastic elements are respectively mounted on the two sliding rods, and the two ends of the limit block and the two ends of the support part are respectively slidably connected to the two sliding rods.

[0018] Preferably, the first driving mechanism comprises a linear driving unit arranged at one end in the width direction of the mounting base, and a guide assembly arranged at the other end, wherein the linear driving unit can drive the slide to perform lifting motion.

[0019] Preferably, the linear drive unit includes a first screw rod fixedly arranged on the mounting base plate, a nut sleeve sleeved on the first screw rod, and a first motor driving the nut sleeve to rotate. The first motor is fixedly mounted on the slide seat. The first motor drives the nut sleeve to rotate, and can drive the nut sleeve to move up and down in an axial spiral manner along the first screw rod.

[0020] Preferably, the guide assembly comprises a guide rail fixed on the mounting base plate, the guide rail extends along the height direction of the mounting base plate, a second roller is provided at the bottom of the slide seat at a position corresponding to the guide rail, and the second roller is in sliding contact with the bottom of the guide rail.

[0021] The second object of the present invention is to provide a car seat, the key of which is: comprising a backrest, in which the above-mentioned massage device is integrated and installed.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The massage device provided by the present invention is integrated into the backrest of the car seat. When the massage function is not in use, the massage head and the rotating bracket are stored in the backrest to prevent them from protruding from the backrest and causing discomfort to the user's waist, thereby ensuring normal riding comfort. When the massage function is in use, the second drive mechanism drives the rotating bracket to rotate outward so that the massage head at the far end of the rotating bracket can be pushed out to the front of the backrest and act on the waist and back of the occupant. The first drive mechanism drives the slide to perform lifting and lowering movements, which can drive the two massage heads to move up and down along the meridians on both sides of the spine of the occupant's back, thereby simulating a reciprocating massage technique, which has the advantage of a good massage effect. At the same time, by controlling the outward rotation angle of the rotating bracket, the massage depth of the massage head can also be adjusted to ensure that users of all body types can get an effective massage.

[0024] 2. The massage device provided by the present invention has a passive collapse function in the working state. When the vehicle collides or other emergencies occur and the massage head is pressed by external force, the support part can overcome the resistance of the elastic element and slide, so that the massage head can be quickly retracted toward the sliding seat, effectively avoiding the massage head from causing harm to the human body, and having the advantage of good safety.

[0025] 3. By arranging the linear drive unit and the guide assembly at both ends, the slide can be lifted and lowered smoothly with fewer parts. At the same time, an assembly space is reserved in the middle of the slide to facilitate the installation of massage components. It has the advantages of reasonable and compact layout, which is conducive to the thin design of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the massage device in a non-working state;

[0027] Figure 2 It is a structural schematic diagram of the massage device in the second state (when the massage head B2 is pushed outward);

[0028] Figure 3 It is a structural schematic diagram of the massage device in the third state (when the slide B slides upward);

[0029] Figure 4 Another structural schematic diagram of the massage device when the massage head B2 is recovered;

[0030] Figure 5 Another structural schematic diagram of the massage device when the massage head B2 is unfolded;

[0031] Figure 6 is a cross-sectional view of the massage device in a state where the massage head B2 is retracted;

[0032] Figure 7 is a cross-sectional view of the massage device in a state where the massage head B2 is unfolded;

[0033] Figure 8 Another structural schematic diagram of the massage device;

[0034] Fig. 9 A schematic diagram showing the positional relationship among the support portion D4, the thrust assembly and the elastic element D1;

[0035] Fig.10 A partial enlarged view showing the positional relationship between the support portion D4 and the second screw rod D32 (some components are hidden);

[0036] Fig.11 is a schematic structural diagram of the support portion D4;

[0037] Fig.12 It is a structural schematic diagram of the limit block D2;

[0038] Fig.13 A front view showing the installation position of the first drive mechanism C;

[0039] Fig.14 A schematic diagram showing the structure of the linear drive unit C1 from a side perspective;

[0040] Fig.15 It is a structural schematic diagram of slide B;

[0041] Fig.16 This is a reference diagram of the use status of the massage device applied to a car seat. DETAILED DESCRIPTION

[0042] The present invention is further described below in conjunction with embodiments and drawings.

[0043] like Fig.16 As shown, a car seat includes a backrest F, in which a massage device is integrated and installed, and the massage device can massage the meridians on both sides of the back spine of the user by massage techniques. In combination with the massage device shown in 1 to 3, it includes a mounting base A, on which a slide B is provided that slides along its height direction, and a first drive mechanism C that drives the slide B to perform lifting and lowering movements. In this embodiment, the mounting base A and the slide B are both plate-shaped structures. A rotating bracket is rotatably mounted on the slide B, and two groups of massage heads B2 are provided at one end of the rotating bracket away from its rotation center, and the two groups of massage heads B2 are respectively used to act on the meridians on both sides of the back spine of the user. A second drive mechanism D is provided on the slide B, and the second drive mechanism D can drive the rotating bracket to rotate so that the massage head B2 can be ejected outward or retracted inward relative to the mounting base A. In this embodiment, the massage head B2 is a rolling massage head.

[0044] Based on this, when the massage function is not used, the massage head B2 and the rotating bracket are stored in the backrest, that is, the massage head B2 is closer to the slide B, which prevents the massage head B2 from 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 B2 for massage, the second drive mechanism D drives the rotating bracket to rotate outward, so that the massage head B2 at the far end of the rotating bracket can be pushed out to the front side of the backrest F (refer to Fig.16 ) and acts on the waist and back of the passenger. Afterwards, the first driving mechanism C drives the slide B to move up and down, which can drive the two sets of massage heads B2 to move up and down along the meridians on both sides of the passenger's spine, thereby simulating the massage technique of reciprocating massage, which has the advantage of good massage effect. At the same time, by controlling the outward rotation angle of the rotating bracket, the massage depth of the massage head B2 can also be adjusted, thereby ensuring that users of all body shapes can get comprehensive relaxation.

[0045] In specific applications, the rotating bracket can be designed as an integrated rotating bracket or two sets of independent massage head arms B1 according to needs. In the present embodiment, the rotating bracket includes two sets of massage head arms B1 symmetrically arranged along the width direction of the slide B, and the two sets of massage heads B2 are respectively arranged at the far ends of the two sets of massage head arms B1, and the two sets of massage head arms B1 are rotatably installed on the slide B at one end away from the massage heads B2 through a rotating shaft.

[0046] Further, combined with Figures 3 to 5As shown, the second driving mechanism D includes a support portion D4 slidably disposed on the slide B, and a thrust assembly for controlling the sliding of the support portion D4. The massage head arm B1 is connected to the support portion D4 via a connecting rod D5. One end of the connecting rod D5 is hinged to the middle of the massage head arm B1, and the other end is hinged to the support portion D4. The support portion D4 slides and can drive the massage head arm B1 to rotate through the connecting rod D5. The thrust assembly drives the support portion D4 to slide upward, and can drive the massage head arm B1 to rotate outward synchronously through the connecting rod D5. The thrust assembly drives the support portion D4 to slide downward, and can drive the massage head arm B1 to rotate inward synchronously under the linkage action of the connecting rod D5, so that the massage head B2 is retracted toward the slide B. The driving methods of the two groups of massage head arms B1 are the same, so only one group of massage head arms B1 is taken as an example for detailed description.

[0047] Please refer to Figure 6 and 7 The thrust assembly includes a limit block D2 abutting against the support portion D4, and a driving component D3 driving the limit block D2 to move along the sliding direction of the support portion D4. An elastic element D1 is provided between the slide B and the support portion D4, and the elastic element D1 exerts a force to make the support portion D4 abut against the limit block D2. When the massage head B2 is pressed by an external force, the support portion D4 can overcome the resistance of the elastic element D1 and slide, so that the massage head B2 moves toward the slide B. With such a design, when the user needs to use the massage head B2 for massage, the driving component D3 drives the limit block D2 to move away from the support portion D4. In this process, since the elastic element D1 exerts a force to make the support portion D4 continuously abut against the limit block D2, the support portion D4 can move synchronously with the limit block D2, so that under the linkage action of the connecting rod D5, the massage head arm B1 can be driven to rotate outward, so that the massage head B2 at the far end of the massage head arm B1 can be pushed out to the front side of the backrest A. After the massage is finished, the driving component D3 drives the limit block D2 to move towards the direction close to the support part D4. At this time, the limit block D2 pushes the support part D4 to overcome the resistance of the elastic element D1 and slide, so that under the linkage action of the connecting rod D5, the massage head arm B1 can be driven to rotate inward, so that the massage head B2 is retracted toward the slide seat B.

[0048] In addition, based on this assembly method, the massage head B2 also has a passive collapse function in the working state. The specific process is: in the working state of the massage head B2, when the vehicle collides or other emergencies occur, and the massage head B2 is compressed by external force, the support part D4 can overcome the resistance of the elastic element D1 and slide. Under the linkage action of the connecting rod D5, the massage head B2 can be driven to quickly retract toward the slide seat B, effectively avoiding the massage head B2 from causing harm to the human body and improving the safety of massage. When the external force disappears, the elastic element D1 is reset, which can push the support part D4 to slide, and then drive the massage head arm B1 and the massage head B2 to automatically return to the working state. Such a design can protect the massage head B2 from damage, save costs and eliminate the trouble of replacing parts, and has the advantage of good practicality.

[0049] Furthermore, the elastic element D1 may be a compression spring, a tension spring, a torsion spring, a leaf spring, a spring sheet, etc. In this embodiment, the elastic element D1 is a compression spring. Figure 6 and 7 , the compression spring abuts between the support portion D4 and the lower end of the slide B, and the limit block D2 moves downward along the height direction of the slide B, that is, moves in the direction close to the compression spring, which can push the support portion D4 downward to compress the compression spring, so as to force the compression spring to store force, and the support portion D4 moves downward, which can drive the massage head arm B1 to rotate toward the slide B through the connecting rod D5. When the limit block D2 moves in the direction away from the support portion D4, 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 portion D4 move synchronously with the limit block D2, so as to drive the massage head arm B1 to rotate outward through the connecting rod D5. In this state, when the massage head B2 is compressed by external force, the support part D4 can squeeze the compression spring downward, and then drive the massage head arm B1 to quickly retract toward the slide B through the connecting rod D5; when the external force disappears, the compression spring can release energy and push the support part D4 to move upward until the support part D4 abuts against the limit block D2. At this time, the massage head arm B1 returns to the working position and the massage head B2 is not damaged by external force.

[0050] like Figure 6 and 7 As shown, a slide bar D6 extending in the height direction is fixed on the slide base B, and the elastic element D1, the support portion D4 and the limit block D2 are sequentially mounted on the slide bar D6 from bottom to top, and the support portion D4 and the limit block D2 can slide up and down relative to the slide bar D6. Such a design ensures the reliability of the installation and movement of the elastic element D1, the support portion D4 and the limit block D2.

[0051] Further, such as Figure 5 and Fig. 9As shown, there are two groups of sliding rods D6, which are symmetrically arranged along the width direction of the slide B. One group of sliding rods D6 corresponds to one group of massage head arms B1, and two groups of elastic elements D1 and connecting rods D5 are also provided. The two groups of elastic elements D1 are respectively mounted on the two sliding rods D6, and both ends of the limit block D2 and both ends of the support part D4 are respectively slidably connected to the two sliding rods D6. The two connecting rods D5 are symmetrically arranged on the sides of the two groups of massage head arms B1.

[0052] Please refer to Fig. 9 The driving component D3 includes a second motor D31 fixed on the slide B and a second screw rod D32 driven to rotate by the second motor D31. The second screw rod D32 extends along the height direction of the slide B and is arranged between the two sets of slide rods D6. The middle part of the limit block D2 is threadedly mounted on the second screw rod D32. The second motor D31 drives the limit block D2 to move downward, which can drive the support part D4 to squeeze the two sets of elastic elements D1 at the same time, and then can drive the two sets of massage head arms B1 to retract inward at the same time, ensuring the synchronization of the movement of the two sets of massage head arms B1. At the same time, such a layout can improve the compactness of the overall structure, so that the mechanism can be better integrated and installed on the backrest of the car seat.

[0053] Depend on Fig. 9 It can be seen that a mounting seat D7 is fixedly provided at the lower end of the slide B, the ends of the two slide rods D6 are fixedly connected to the two ends of the mounting seat D7 in the width direction, and the lower end of the second screw rod D32 is rotatably supported in the middle of the mounting seat D7. On the same slide rod D6, one end of the elastic element D1 is supported on the mounting seat D7, and the other end is in contact with the corresponding support portion D4. With such consideration, the reliability of the installation is guaranteed.

[0054] Combination Fig. 9 and Fig.12 As shown, both ends of the limit block D2 have first connection holes D21, and the two first connection holes D21 are respectively slidably sleeved on the two sets of slide rods D6. The middle part of the limit block D2 is provided with a second connection hole D22, and the second connection hole D22 is threadedly sleeved on the second screw rod D32.

[0055] Please refer to Fig.10 and 11 The two ends of the support part D4 are provided with sleeve parts D41 which are respectively slidably mounted on the two sets of slide rods D6, and one end of the compression spring abuts against the corresponding sleeve part D41. The middle part of the support part D4 has a downwardly concave avoidance groove D42, and the second screw rod D32 is located above the avoidance groove D42, which further improves the compactness of the structure.

[0056] Re-attend Fig.10A first roller D8 is provided on the lower side of the support part D4 in sliding contact with the slide B. The first roller D8 increases the smoothness of the support part D4 sliding on the slide B. On the other hand, when a collision occurs, the support part D4 can also smoothly squeeze the compression spring downward to ensure that the massage head arm B1 can be quickly retracted.

[0057] like Fig.13 As shown, the first driving mechanism C includes a linear driving unit C1 arranged at one end in the width direction of the mounting substrate A, and a guide assembly C2 arranged at the other end. The linear driving unit C1 can directly drive the slide B to perform lifting motion, and the guide assembly C2 is used to make the lifting of the slide B on the mounting substrate A smoother. The advantage of this design is that by arranging the linear driving unit C1 and the guide assembly C2 at both ends, an installation space can be reserved for the middle of the slide B to facilitate the installation of the massage component, which has the advantages of reasonable and compact layout and is conducive to the thin design of the device.

[0058] Furthermore, Fig.13 and 14 As shown, the linear drive unit C1 includes a first screw rod C11 extending in the height direction of the mounting substrate A, a nut sleeve C12 sleeved on the first screw rod C11, and a first motor C13 driving the nut sleeve C12 to rotate, wherein the first screw rod C11 is located at the left end of the mounting substrate A, and both ends of the first screw rod C11 are fixedly supported on the mounting substrate A through a support seat C3. The first motor C13 is fixedly mounted on the slide B, and the first motor C13 drives the nut sleeve C12 to rotate, which can drive the nut sleeve C12 to move along the axial spiral lifting and lowering of the first screw rod C11, thereby driving the first motor C13 and the slide B to move up and down as a whole. Since the first screw rod C11 is offset, the slide B is prone to shaking clearance, therefore, the guide assembly C2 at the right end can absorb the shaking clearance of the slide B, thereby ensuring the stability of the lifting and lowering movement of the slide B. At the same time, by fixing the first screw rod C11, a more stable support can be provided for the slide B.

[0059] like Figure 4 and 13 As shown, the guide assembly C2 includes a guide rail C21 fixed on the right end of the mounting substrate A, and the guide rail C21 extends along the height direction of the mounting substrate A. As shown in Figure 15, a second roller C22 is provided at the bottom of the slide B corresponding to the position of the guide rail C21, and the second roller C22 is in sliding contact with the guide rail C21.

[0060] Furthermore, Fig.13 and 15As shown, a strip-shaped guide groove C23 is provided on the guide rail C21, and a roller bracket C24 extending downward into the guide groove C23 is provided at the bottom of the slide B. One roller bracket C24 is provided with two second rollers C22, and the two second rollers C22 are rotatably mounted on both sides of the roller bracket C24. In this embodiment, at least two groups of roller brackets C24 are provided. Such a design improves the smoothness of the sliding of the slide B and also has the advantage of low cost.

[0061] Please refer to Fig.15 The bottom of the slide B is rotatably provided with a plurality of sets of third rollers B5 that are in sliding contact with the mounting substrate A. The third rollers B5 can further improve the smoothness of the sliding of the slide B.

[0062] 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 massage device, characterized in that: include: A mounting base (A), wherein the mounting base (A) is provided with a slide seat (B) which slides along its height direction; a first driving mechanism (C), which is used to drive the slide (B) to move up and down along the mounting base (A); A rotating bracket is rotatably mounted relative to the slide (B), and two groups of massage heads (B2) are provided at one end of the rotating bracket away from its rotation center, and the two groups of massage heads (B2) are respectively used to act on the meridians on both sides of the spine of the user's back; as well as The second driving mechanism (D) is used to drive the rotating bracket to rotate so that the two groups of massage heads (B2) can be pushed outward or retracted inward relative to the mounting base plate (A).

2. The massage device according to claim 1, characterized in that: The second driving mechanism (D) comprises a support part (D4) slidably arranged on a slide seat (B), and a thrust assembly for controlling the sliding of the support part (D4); the rotating bracket and the support part (D4) are connected via a connecting rod (D5); one end of the connecting rod (D5) is hinged to the rotating bracket, and the other end is hinged to the support part (D4); the supporting part (D4) slides and can drive the rotating bracket to rotate via the connecting rod (D5).

3. The massage device according to claim 2, characterized in that: The thrust assembly comprises a limit block (D2) abutting against the support portion (D4), and a driving component (D3) driving the limit block (D2) to move along the sliding direction of the support portion (D4); an elastic element (D1) is provided between the slide seat (B) and the support portion (D4); the elastic element (D1) exerts a force to make the support portion (D4) abut against the limit block (D2); when the massage head (B2) is pressed by an external force, the support portion (D4) can overcome the resistance of the elastic element (D1) and slide, so that the massage head (B2) moves toward the slide seat (B).

4. The massage device according to claim 3, characterized in that: The elastic element (D1) is a compression spring, and the compression spring abuts between the support portion (D4) and the end of the slide seat (B). The limit block (D2) moves in a direction close to the compression spring, and can force the compression spring to store force through the support portion (D4). The limit block (D2) moves in a direction away from the support portion (D4), and can release the elastic potential energy of the compression spring. The thrust generated by the compression spring can make the support portion (D4) move synchronously with the limit block (D2).

5. The massage device according to claim 4, characterized in that: The slide seat (B) is fixedly provided with a slide rod (D6) extending along its height direction; the elastic element (D1), the support portion (D4) and the limit block (D2) are sequentially mounted on the slide rod (D6) along the height direction; and the support portion (D4) and the limit block (D2) can slide up and down relative to the slide rod (D6).

6. The massage device according to claim 5, characterized in that: The rotating bracket comprises two groups of massage head arms (B1) symmetrically arranged along the width direction of the slide seat (B), and the two groups of massage heads (B2) are respectively arranged at the ends of the two groups of massage head arms (B1); The sliding rod (D6), the elastic element (D1) and the connecting rod (D5) are each provided with two groups, the two groups of the sliding rod (D6) are symmetrically arranged along the width direction of the sliding seat (B), the two groups of elastic elements (D1) are respectively mounted on the two sliding rods (D6), and the two ends of the limit block (D2) and the two ends of the support part (D4) are respectively slidably connected to the two sliding rods (D6).

7. The massage device according to claim 1, characterized in that: The first driving mechanism (C) comprises a linear driving unit (C1) arranged at one end of the mounting base (A) in the width direction, and a guide assembly (C2) arranged at the other end, wherein the linear driving unit (C1) can drive the slide (B) to perform lifting motion.

8. The massage device according to claim 7, characterized in that: The linear drive unit (C1) comprises a first screw rod (C11) fixedly arranged on the mounting base (A), a nut sleeve (C12) sleeved on the first screw rod (C11), and a first motor (C13) driving the nut sleeve (C12) to rotate, wherein the first motor (C13) is fixedly mounted on a slide seat (B), and the first motor (C13) drives the nut sleeve (C12) to rotate, thereby driving the nut sleeve (C12) to move in an axial spiral manner along the first screw rod (C11).

9. The massage device according to claim 7, characterized in that: The guide assembly (C2) comprises a guide rail (C21) fixed on the mounting substrate (A), the guide rail (C21) extending along the height direction of the mounting substrate (A), and a second roller (C22) is provided at a position at the bottom of the slide seat (B) corresponding to the guide rail (C21), and the second roller (C22) is in sliding contact with the bottom of the guide rail (C21).

10. A car seat, characterized in that: The invention comprises a backrest (F), wherein the massage device according to any one of claims 1 to 9 is integrated and installed in the backrest (F).

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