Seat backrest adjusting mechanism and massage chair

Abstract

The utility model belongs to the field of massage armchairs, and provides a seat backrest adjusting mechanism and a massage armchair.The seat backrest adjusting mechanism comprises a seat backrest movably arranged on a seat main body, and the seat backrest is used for supporting the back and providing reciprocating rubbing; the driving mechanism is arranged on the seat body, the output end of the driving mechanism is connected to the bottom end of the seat backrest, and the driving mechanism is used for adjusting the included angle formed between the seat backrest and the seat body. Compared with the prior art, the seat has the advantages that a user is allowed to easily adjust the angle of the backrest of the seat according to own needs through the driving mechanism, so that the seat is more flexible and convenient; meanwhile, the rotation center formed by the extension mechanism is close to the hipbone position of the user, so that displacement generated between the back of the user and the seat backrest is effectively reduced in the inclination adjustment process of the seat backrest, stable supporting and massage operation of the seat backrest at any inclination angle are guaranteed, and the user experience is improved. The situation that the overall experience and comfort of a user are affected due to change of the massage position is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to massage chair field, concretely relates to a seat backrest adjusting mechanism and massage chair. BACKGROUND

[0002] On the current market, although many seats provide backrest angle adjustment function, but these designs often do not fully consider the ergonomic principle, leading to a variety of discomfort problems that users may appear in the long use process.

[0003] The traditional seat backrest not only needs the user to manually tilt adjustment, the whole operation process is time-consuming and laborious, is not favorable to the user fast use, and because the rotation center of the existing seat backrest relative to the seat main body is located below the seat main body or the position of the connecting place, when the user sits on the seat main body, the rotation center of the seat backrest is far from the user's hip position, which also makes the back part on the seat backrest produce a certain displacement between the seat backrest in the process of leaning on the seat backrest and tilting, and this also changes the massage position of the seat backrest to the back part, and then cannot achieve the massage effect required by the user, seriously affects the user's use experience and comfort. SUMMARY

[0004] In view of the above-mentioned deficiencies existing in the prior art, the technical problem to be solved by the utility model is to provide a seat backrest adjusting mechanism and massage chair which can automatically adjust the inclination angle of the seat backrest, ensure that the massage position of the back part does not change, and improve the user's use experience and comfort.

[0005] The utility model solves its technical problems by adopting the technical scheme of providing a seat backrest adjusting mechanism, which comprises: a seat backrest movably arranged on a seat main body, the seat backrest being used for supporting the back part and providing reciprocating kneading.

[0006] A driving mechanism is arranged on the seat main body, the output end of the driving mechanism being connected to the bottom end of the seat backrest, and the driving mechanism is used for adjusting the included angle formed between the seat backrest and the seat main body.

[0007] An extension mechanism is connected to one end of the seat backrest and the other end of the seat main body, a rotation center is formed on the extension mechanism, the seat backrest can be inclined relative to the seat main body about the rotation center, and the rotation center is close to the hip position of the user, so that when the seat backrest is turned over, the back part and the seat backrest are prevented from producing relative displacement.

[0008] In the seat backrest adjusting mechanism, the extension mechanism comprises an extension plate and a fixed plate, the extension plate is vertically arranged on the side wall of the seat backrest, and one end of the fixed plate is mounted on the seat body and the other end is movably hinged to the extension plate.

[0009] In the seat backrest adjusting mechanism, a first connecting hole is formed on the extension plate, a second connecting hole is formed on the fixed plate, and the first connecting hole and the second connecting hole are connected by a locking pin when they are in communication to form the rotation center of the seat backrest.

[0010] In the seat backrest adjusting mechanism, a reinforcing block is further arranged on the seat body and movably attached to the side wall of the fixed plate.

[0011] In the seat backrest adjusting mechanism, the fixed plate is arranged at an angle with the seat body, and the inclination direction of the fixed plate is towards the seat backrest.

[0012] In the seat backrest adjusting mechanism, the end of the fixed plate and the extension plate close to the rotation center is formed with a circular arc surface with equal curvature.

[0013] In the seat backrest adjusting mechanism, a first inclined surface is formed on the extension plate, a second inclined surface is formed on the fixed plate, and the first inclined surface and the second inclined surface are tangent to the circular arc surface.

[0014] In the seat backrest adjusting mechanism, the driving mechanism comprises a driving member and a driving rod, a backrest support is formed on the seat backrest, a connecting seat is arranged on the backrest support, a fixed seat is arranged on the seat body, the driving member is movably hinged to the fixed seat, one end of the driving rod is connected to the driving member, and the other end is movably hinged to the connecting seat.

[0015] In the seat backrest adjusting mechanism, the driving member is an electric push rod, a hydraulic cylinder or an air cylinder.

[0016] The utility model discloses a massage chair, including the seat backrest adjusting mechanism of above-mentioned, still include back massage piece and massage gyro wheel, back massage piece movably arranged in the seat backrest, massage gyro wheel sets up on back massage piece, to the massage of user's back.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] (1) The utility model relates to a seat backrest adjusting mechanism and massage chair through the drive mechanism allows the user to easily adjust the angle of seat backrest according to the need, provides a more flexible, personalized selection for the user, simultaneously utilizes the rotation center formed by extension mechanism to be close to the iliac bone position of the user, makes the seat backrest in the process of inclination adjustment, effectively reduces the displacement between the back of the user and the seat backrest, guarantees the stable support and massage operation of seat backrest under any inclination angle, avoids the influence of the change of massage position on the overall experience and comfort of the user.

[0019] (2) Through the cooperation of the circular surface and the tangent bevel, the seat backrest will not affect the comfort of the user when using due to local protrusion or depression under any inclination angle, guarantees the smooth contact between the user and the extension mechanism, effectively avoids the knocking or injury phenomenon of the user in the use process.

[0020] (3) The design of the reinforcing block makes the seat backrest obtain additional supporting force under any inclination angle, effectively prevents the seat backrest from shaking or being unstable during the adjustment process, enhances the overall structural strength of the seat, reduces the risk of gravity center deviation or overturning caused by the inclination of the seat backrest, improves the safety during use. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the perspective view of the present application;

[0022] Figure 2 It is the side view of the seat body and seat backrest;

[0023] Figure 3 It is the explosion view between the seat body and seat backrest;

[0024] Figure 4 It is the installation structure schematic diagram of the drive mechanism.

[0025] In the drawing, 1, seat body;10, fixed seat;

[0026] 2, seat backrest;20, backrest support;200, connecting seat;21, back massage piece;22, massage roller;

[0027] 3, drive mechanism;30, drive piece;31, drive rod;

[0028] 4, extension mechanism;40, extension plate;400, first connecting hole;401, first bevel;41, fixed plate;410, second connecting hole;411, second bevel;420, rotation center;421, circular surface;43, reinforcing block. DETAILED DESCRIPTION

[0029] The technical solutions of the present application are further described below with reference to specific embodiments of the present application and in conjunction with the accompanying drawings, but the present application is not limited to these embodiments.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0031] As shown in Figure 1 , in this scheme, a seat backrest 2 adjusting mechanism used in a massage chair is mainly described, but the seat backrest adjusting mechanism is not limited to being used in a massage chair, and can also be applied to other seats, such as e-sports chairs, car seats, etc.

[0032] As shown in Figures 1 to 4 , a seat backrest 2 adjusting mechanism, comprising: a seat backrest 2 movably arranged on a seat body 1, the seat backrest 2 being used to support the back and provide reciprocating rubbing; a driving mechanism 3 arranged on the seat body 1, an output end of the driving mechanism 3 being connected to a bottom end of the seat backrest 2, the driving mechanism 3 being used to adjust an included angle formed between the seat backrest 2 and the seat body 1; an extension mechanism 4, one end of the extension mechanism 4 being connected to the seat backrest 2, the other end of the extension mechanism 4 being connected to the seat body 1, a rotation center 420 being formed on the extension mechanism 4, the seat backrest 2 being able to tilt relative to the seat body 1 about the rotation center 420, the rotation center 420 being close to the user's hip position, so that when the seat backrest 2 is turned over, the back and the seat backrest 2 are prevented from producing relative displacement.

[0033] Specifically, when a user sits on the seat body 1 and leans the back against the seat backrest 2, in the case of needing to adjust the angle of the seat backrest 2, the driving mechanism 3 pushes or pulls the bottom end of the seat backrest 2 according to the user's instruction (for example, through a button or a remote control), so that the seat backrest 2 performs tilting movement about the rotation center 420 on the extension mechanism 4, the whole process does not need manual operation, and the angle of the seat backrest 2 can be accurately adjusted according to the user's instruction to meet the needs in different scenarios, so as to enjoy personalized sitting posture selection. In the traditional seat backrest 2 structure, the rotation center 420 of the seat backrest 2 is often arranged at the bottom of the seat body 1 or at the connection position with the seat body 1 (connected through a hinge), which is far from the hip position of the user sitting on the seat body 1, resulting in displacement between the user's back and the seat backrest 2 in the process of adjusting the tilting of the seat backrest 2 due to the inconsistency of the rotation centers 420, and finally changing the massage position. To solve the above technical problem, the present embodiment forms the rotation center 420 on the extension mechanism 4, so that the rotation center 420 of the seat backrest 2 is close to the user's hip position, and the seat backrest 2 is prevented from producing relative displacement with the user's back when the seat backrest 2 is turned over, and the massage position is not changed.Figure 2 As shown, the rotation center 420 is located above the seat body 1. When the user sits on the seat body 1, the seat back 2 is designed to better adapt to ergonomic principles, with the rotation center 420 close to the user's hip bone (the hip usually refers to the hip joint, which is composed of the acetabulum and femoral head, and is a ball-and-socket joint located at the junction of the torso and lower limbs). As the seat back 2 tilts relative to the seat body 1 around the rotation center 420, the user's torso (including the back) tilts backward around the hip bone. Since the rotation centers of both are close (or almost level with the user's hip bone during manufacturing and design), it ensures that when the seat back 2 is flipped, the user's back and the seat back 2 are always in close contact (i.e., providing uniform and stable support for the back). This effectively avoids relative displacement between the user's back and the seat back 2 during synchronous tilting, thus preventing back slippage or discomfort caused by the movement of the seat back 2 in traditional designs. This not only improves comfort but also enhances safety.

[0034] The extension mechanism 4 includes an extension plate 40 and a fixing plate 41. The extension plate 40 is vertically disposed on the side wall of the seat back 2. One end of the fixing plate 41 is installed on the seat body 1, and the other end is movably hinged to the extension plate 40.

[0035] Preferably, such as Figures 1 to 3 As shown, in this embodiment, the extension plate 40 is installed at the lower middle position of the seat back 2, so that the drive mechanism 3 can easily and smoothly drive the seat back 2 to tilt and rotate relative to the seat body 1. The movable hinge design allows the extension plate 40 to rotate freely relative to the fixed plate 41 within a certain range, while maintaining close contact with the fixed plate 41, effectively preventing the seat back 2 from shaking or becoming unstable during adjustment. As the extension plate 40 and the fixed plate 41 are connected by the movable hinge, a stable support structure is formed, enhancing the overall structural strength of the seat, especially when the seat back 2 is tilted significantly, it can still maintain sufficient support. It is precisely because of the movable hinge design that the contact point between the extension plate 40 and the fixed plate 41 can smoothly transition, avoiding jamming or friction points during adjustment, ensuring the smoothness and stability of the seat back 2 adjustment.

[0036] The extension plate 40 has a first connecting hole 400, and the fixing plate 41 has a second connecting hole 410. The first connecting hole 400 and the second connecting hole 410 can be connected by a locking pin when they are connected to each other to form the rotation center 420 of the seat back 2.

[0037] Further preferably, during the installation process, the connecting holes on the extension plate 40 and the fixed plate 41 need to be coaxially aligned, so that the locking pin (not shown in the figure) can be inserted to achieve the effect of movably connecting the extension plate 40 and the fixed plate 41, which is convenient for installation and also provides great convenience for subsequent maintenance and replacement, thereby prolonging the service life of the seat back 2. It should be noted that, with the locking pin movably connecting the extension plate 40 and the fixed plate 41, the adjustment of the inclination angle can be performed around the locking pin as the rotation center 420 during the inclination and rotation of the seat back 2 relative to the seat body 1. Preferably, the inner diameter of the first connecting hole 400 is larger than the inner diameter of the second connecting hole 410 in the present embodiment, so that when the locking pin is inserted into and connected to the second connecting hole 410, the end of the locking pin close to the seat body 1 can be completely hidden in the first connecting hole 400, ensuring the overall aesthetics of the seat back 2 and the seat body 1, while effectively avoiding the damage caused by scratches between the exposed locking pin and the user, improving the safety of the user during use.

[0038] Further preferably, as shown in Figure 2 and Figure 3 , the present embodiment also provides a reinforcing block 43 on the seat body 1, which is always movably attached to the side wall of the fixed plate 41 during the adjustment of the seat back 2 to provide additional support force, effectively preventing the seat back 2 from shaking or becoming unstable, especially when the seat back 2 is inclined at a large angle, the reinforcing block 43 provides additional support and enhances the overall stability. Preferably, the reinforcing block 43 and the fixed plate 41 in the present embodiment can be integrally formed and fixedly connected to the seat body 1 by laser welding.

[0039] Further preferably, as shown in Figure 2 and Figure 3 , the fixed plate 41 in the present embodiment is arranged at an angle to the seat body 1, and the inclination direction of the fixed plate 41 is towards the seat back 2. This design allows the fixed plate 41 to better distribute pressure and reduce local stress concentration when the seat back 2 is inclined, improving overall comfort; Furthermore, the fixed plate 41 inclined towards the seat back 2 facilitates smoother and more accurate relative movement between the fixed plate 41 and the extension plate 40, effectively avoiding unnecessary interference or jamming, prolonging the service life.

[0040] Further preferably, as shown in Figure 2 and Figure 3As shown, the end of the fixed plate 41 and the extension plate 40 close to the rotation center 420 is formed with a circular arc surface 421 with equal curvature, and the first connecting hole 400 and the second connecting hole 410 are respectively arranged at the center of the circular arc surface 421. When the two are movably connected by the locking pin, the design of the circular arc surface 421 enables the extension plate 40 and the fixed plate 41 to maintain close and smooth contact at any angle, reducing friction and wear, improving stability, and prolonging the service life of the parts. Due to the structural design of the circular arc surface 421, the user can effectively avoid injury to the hip position caused by bumps during the process of sitting on the seat body 1 and leaning against the seat back 2, improving the safety during use.

[0041] Further preferably, as shown in Figure 2 and Figure 3 , the first inclined surface 401 is formed on the extension plate 40, and the second inclined surface 411 is formed on the fixed plate 41. When the seat back 2 is in the inclined posture as shown in Figure 2 , the first inclined surface 401 and the second inclined surface 411 are tangent to the circular arc surface 421, and it can be found that the first inclined surface 401 is always tangent to the circular arc surface 421 regardless of the inclination posture of the seat back 2. Therefore, by matching the circular arc surface 421 with the inclined surface tangent thereto, the seat back 2 will not affect the user's comfort during use due to local protrusions or depressions regardless of the inclination angle, ensuring smooth contact between the user and the extension mechanism 4, and effectively preventing bumps or injuries during use.

[0042] The driving mechanism 3 includes a driving member 30 and a driving rod 31. The seat back 2 is formed with a backrest support 20, and the backrest support 20 is provided with a connecting seat 200. The seat body 1 is provided with a fixed seat 10, and the driving member 30 is movably connected to the fixed seat 10. One end of the driving rod 31 is connected to the driving member 30, and the other end is movably connected to the connecting seat 200.

[0043] Further, as shown in Figure 4As shown, the driving mechanism 3 in this embodiment is composed of two parts, a driving piece 30 and a driving rod 31, when the user needs to adjust the angle of the seat back 2, the driving piece 30 starts to act to pull the seat support (together with the seat back 2) to adjust the inclination angle of the seat back 2 relative to the seat body 1 around the above-mentioned rotation center 420, this structure enables the user to freely adjust the angle of the seat back 2 according to personal needs, combined with the reciprocating kneading function, realizes the highly personalized sitting posture selection, and meets the health needs of different users. The driving piece 30 and the driving rod 31 are hingedly connected, which effectively prevents the component from interfering or jamming during the angle adjustment of the seat back 2, ensuring the smoothness and stability of the seat back 2 during adjustment, and ensuring that the user's experience is not affected. Preferably, the driving piece 30 in this embodiment can be replaced by any one of an electric push rod, a hydraulic cylinder or a pneumatic cylinder, of course, the driving mode is not limited to these in this embodiment, and other conventional driving devices in mechanical structures can also be used.

[0044] In addition, the application also designs a massage chair applying the above-mentioned seat back 2 adjusting mechanism, which can be provided with a back massage piece 21 and a massage roller 22 on the basis of the overall structure of the seat back 2 adjusting mechanism, when the user selects the desired lying angle according to the actual needs, the back massage piece 21 can control the massage roller 22 to massage the user's back alone, so that the user can obtain a more comfortable massage experience.

[0045] It should be noted that in the present application, descriptions such as "first", "second", "one" and the like are only for descriptive purposes and should not be construed as indicating or implying relative importance or implying the number of the indicated technical features. Therefore, the features defined as "first" and "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited. The terms "connection", "fixation" and the like should be interpreted broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0047] The specific embodiments described herein are merely illustrative of the principles of this application. Numerous modifications or adaptations will be readily apparent to those skilled in the art of the present application without departing from the spirit or scope of the present application as defined in the following claims.

Claims

1. A seat back adjustment mechanism characterized by, The utility model provides a seat backrest and a driving mechanism, wherein the seat backrest is arranged on a seat body and is used for supporting a back and providing reciprocating kneading; the driving mechanism is arranged on the seat body, an output end of the driving mechanism is connected to a bottom end of the seat backrest, and the driving mechanism is used for adjusting an included angle formed between the seat backrest and the seat body; an extension mechanism is connected to the seat backrest at one end and to the seat body at the other end, a rotation center is formed on the extension mechanism, the seat backrest can be inclined relative to the seat body about the rotation center, and the rotation center is close to a pubic bone position of a user, so that when the seat backrest is turned over, relative displacement between the back and the seat backrest is prevented. The extension mechanism comprises an extension plate and a fixing plate, the extension plate is vertically arranged on a side wall of the seat backrest, one end of the fixing plate is mounted on the seat body, and the other end of the fixing plate is movably hinged to the extension plate. First connecting holes are formed in the extension plate, second connecting holes are formed in the fixing plate, the first connecting holes and the second connecting holes are connected by a locking pin when the first connecting holes and the second connecting holes are in communication, and the rotation center of the seat backrest is formed. The seat body is further provided with a reinforcing block, and the reinforcing block is movably attached to a side wall of the fixing plate.

2. A seat backrest adjustment mechanism according to claim 1, characterised in that, The fixing plate is arranged at an included angle with the seat body, and an inclination direction of the fixing plate is towards the seat backrest.

3. A seat backrest adjustment mechanism according to claim 2, wherein End portions of the fixing plate and the extension plate close to the rotation center are formed with circular arc surfaces of equal radii.

4. A seat backrest adjustment mechanism according to claim 2, wherein First inclined surfaces are formed in the extension plate, second inclined surfaces are formed in the fixing plate, and the first inclined surfaces and the second inclined surfaces are tangent to the circular arc surfaces.

5. A seat backrest adjustment mechanism according to claim 2, wherein The driving mechanism comprises a driving member and a driving rod, a backrest support is formed in the seat backrest, a connecting seat is arranged on the backrest support, a fixing seat is arranged on the seat body, the driving member is movably hinged to the fixing seat, one end of the driving rod is connected to the driving member, and the other end of the driving rod is movably hinged to the connecting seat.

6. A seat backrest adjustment mechanism according to claim 2 or 5, wherein The driving member is an electric push rod, a hydraulic cylinder or an air cylinder.

7. A seat backrest adjustment mechanism according to claim 6, wherein The utility model provides a seat backrest and a driving mechanism, wherein the seat backrest is arranged on a seat body and is used for supporting a back and providing reciprocating kneading; the driving mechanism is arranged on the seat body, an output end of the driving mechanism is connected to a bottom end of the seat backrest, and the driving mechanism is used for adjusting an included angle formed between the seat backrest and the seat body; an extension mechanism is connected to the seat backrest at one end and to the seat body at the other end, a rotation center is formed on the extension mechanism, the seat backrest can be inclined relative to the seat body about the rotation center, and the rotation center is close to a pubic bone position of a user, so that when the seat backrest is turned over, relative displacement between the back and the seat backrest is prevented.

8. A seat backrest adjustment mechanism according to claim 1, wherein The utility model discloses a back massage member and a massage roller, the back massage member is movably arranged in the seat backrest, and the massage roller is arranged on the back massage member to massage the back of a user.

9. A seat backrest adjustment mechanism according to claim 8, wherein, ​ 10. A massage chair to which the seat backrest adjustment mechanism according to any one of claims 1 to 9 is applied, characterized by ​

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