Backrest assembly and seat

Abstract

The utility model discloses a backrest assembly which comprises a backrest, a linkage support, a first supporting component and a second supporting component, and the linkage support is located on one side of the backrest and rotationally connected with a base of a seat. One end of the first supporting component is movably connected with the backrest, and the other end of the first supporting component is rotationally connected with the linkage bracket; one end of the second supporting member is rotatably connected with the first supporting member or the backrest, and the other end of the second supporting member is connected with the base. According to the backrest assembly of the seat, when the backrest is subjected to pressure towards the rear side of the seat, the backrest can move relative to the first supporting component, the linkage support and / or the base through movable connection of the first supporting component and the backrest, so that when a user uses the seat, and the back and / or the waist of the user exert force on the backrest to adjust the sitting posture, the user can conveniently adjust the sitting posture. The backrest can adaptively move along with adjustment of the sitting posture of the user so as to be better attached to the back and / or the waist of the user, better supporting is achieved, and the use comfort of the seat is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of seat, especially relates to a backrest assembly and the seat of application of this backrest assembly. BACKGROUND

[0002] The seat is the daily life or the office in the common article, is composed of the cushion, the backrest and the handrail etc. Among them, the backrest as the part of providing the human body back support can maintain the user's sitting posture, and the pressure of cervical vertebra, back and waist is reduced.

[0003] When the user sits on the seat, the back is usually leaned on the backrest of the seat. In the related art, because the backrest of the seat is fixed relative to the cushion, when the sitting posture of the user is adjusted, the backrest of the seat is difficult to adaptively adjust with the adjustment of the sitting posture of the user, resulting in that part of the user's back and waist is suspended or not supported enough, and the comfort of using the seat is poor. SUMMARY

[0004] The main purpose of the utility model is to provide a backrest assembly, which aims to improve the comfort of the user when using the backrest of the seat.

[0005] To achieve the above purpose, the utility model provides a backrest assembly of a seat, which comprises:

[0006] a backrest;

[0007] a linkage support located on one side of the backrest and rotationally connected to the base of the seat;

[0008] a first support member, one end of the first support member being movably connected to the backrest, and the other end of the first support member being rotationally connected to the linkage support;

[0009] a second support member, one end of the second support member being rotationally connected to the first support member or the backrest, and the other end of the second support member being connected to the base.

[0010] In some embodiments, one end of the first support member is rotationally connected to the backrest.

[0011] In some embodiments, the first support member is a connecting rod, one end of the connecting rod being rotationally connected to the backrest, and the other end of the connecting rod being rotationally connected to the linkage support.

[0012] In some embodiments, the first support member comprises a driving member, the driving member comprising an output end and a connecting end, one of the output end and the connecting end being rotationally connected to the backrest, and the other of the output end and the connecting end being rotationally connected to the linkage support.

[0013] The driving member is configured to drive at least a part of the backrest to approach or move away from the linkage support.

[0014] In some embodiments, the first support member further comprises a mounting seat connected with the connecting end of the driving member, wherein:

[0015] The mounting seat is rotatably connected with the linkage support; and / or

[0016] The second support member is rotatably connected with the mounting seat.

[0017] In some embodiments, the mounting seat is configured with a first rotating part, the linkage support is configured with a second rotating part matched with the first rotating part, and the mounting seat is rotatably connected with the linkage support through the cooperation of the first rotating part and the second rotating part.

[0018] In some embodiments, the backrest and / or the linkage support are provided with a first matching structure, the first support member is provided with a second matching structure matched with the first matching structure, wherein:

[0019] The first matching structure is rotatably connected with the second matching structure; and / or

[0020] One of the first matching structure and the second matching structure is a receiving groove, and the other is a receiving member rotatable in the receiving groove.

[0021] In some embodiments, the backrest assembly further comprises an adapter, the adapter has a first connecting part for connecting the backrest and a second connecting part for connecting the first support member, wherein:

[0022] The first connecting part is movably connected with the backrest; or

[0023] The second connecting part is movably connected with the first support member.

[0024] In some embodiments, the first connecting part of the adapter is arranged at an angle with the second connecting part.

[0025] In some embodiments, the backrest assembly further comprises an elastic member for connecting the first support member and the backrest.

[0026] In some embodiments, the backrest assembly further comprises a connecting member for connecting the first support member and the linkage support, wherein:

[0027] One end of the connecting member is rotatably connected with the first support member, and the other end is drivingly connected with the linkage support.

[0028] In some embodiments, one end of the second support member is fixedly connected to the base, and the other end is rotatably connected to the backrest.

[0029] Further, the utility model provides a seat, including seat body, the base of installation in the seat body and the backrest assembly of as described in preceding embodiment of installation in the seat body.

[0030] The backrest assembly of the utility model seat, the backrest is connected with the linkage support through the first support member, one end of the first support member is movably connected with the backrest, and the other end of the first support member is rotatably connected with the linkage support, one end of the second support member is rotatably connected with the first support member or the backrest, and the other end is connected with the base, and the backrest, the linkage support, the first support member, the second support member and the base form a relatively stable linkage mechanism, so that when the backrest is subjected to pressure towards the rear side of the seat, the backrest can move (slide, rotate, slide and rotate) relative to the first support member, the linkage support and / or the base through the movable connection of the first support member and the backrest, when the backrest or the linkage support is subjected to pressure towards the rear side of the seat and the linkage support rotates relative to the base, the linkage support can drive the backrest to move relative to the base through the movable connection of the first support member and the backrest and the rotary connection of the linkage support, and the other end of the second support member is connected with the base, and the second support member and the first support member or the backrest can rotate relative to the first support member or the backrest when supporting the first support member or the backrest. Similarly, when the backrest or the linkage support is subjected to external force towards the front side of the seat, the linkage support rotates towards the front side of the seat, the backrest rotates towards the front side of the seat following the linkage support, and can move (slide, rotate, slide and rotate) relative to the first support member, the linkage support and / or the base. Through the above arrangement, when the user uses the seat and the user's back and / or waist exerts force on the backrest to adjust the sitting posture, the backrest can adaptively move with the user's sitting posture adjustment to better fit the user's back and / or waist, better support, reduce the pressure on the user's back and / or waist and improve the use comfort of the seat. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structural schematic view of the backrest assembly of the utility model in an embodiment.

[0032] Figure 2 It is a partial structural schematic view of an embodiment of the backrest assembly of the utility model.

[0033] Figure 3 It is Figure 2 It is a structural schematic view of a partial structure of an embodiment of the backrest assembly of the utility model in a front view.

[0034] Figure 4 It is Figure 3Sectional view at A-A;

[0035] Figure 5 Structure schematic view of backrest of backrest assembly in one embodiment of the utility model;

[0036] Figure 6 For Figure 5 Enlarged view at C;

[0037] Figure 7 For Figure 5 Section at B-B;

[0038] Figure 8 For Figure 7 Enlarged view at D;

[0039] Figure 9 Structure schematic view of adapter of backrest assembly in one embodiment of the utility model;

[0040] Figure 10 Structure schematic view of backrest assembly in another embodiment of the utility model.

[0041] The realization, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0042] The scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only the first cosmetic packaging bag embodiments in the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative visual positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications also change accordingly.

[0044] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can have a middle element.

[0045] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of 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 in the protection scope required by the present application.

[0046] Referring to Figure 1 The utility model provides a backrest assembly of a seat, comprising:

[0047] Backrest 1;

[0048] Linkage bracket 2 is located in one side of backrest 1, and is rotatably connected with the base 500 of the seat;

[0049] First support member 3, one end of first support member 3 is movably connected with backrest 1, and the other end of first support member 3 is rotatably connected with linkage bracket 2;

[0050] Second support member 4, one end of second support member 4 is rotatably connected with first support member 3 or rotatably connected with backrest 1, and the other end of second support member 4 is connected with base 500.

[0051] In the seat, backrest 1 is used as a support structure to support the back and / or waist of the user in the embodiment. Backrest 1 can be made of nylon, metal or high-strength plastic and the like, which provides the necessary strength and rigidity to support the back and / or waist of the human body. A filling layer can be provided on backrest 1 and wrapped by an outer skin. The main function of the filling layer is to provide comfortable support and cushioning, and sponge, foamed plastic, memory cotton and the like can be selected. The outer skin protects the filling layer and provides an aesthetic appearance, which can be fabric, leather, artificial leather and the like, and can be selected according to actual needs, which is not limited.

[0052] The backrest 1 can be a single-body structure, i.e., the number of bodies is one, and the backrest 1 is arranged corresponding to the human body part, which can only provide support for the back of the human body, or only provide support for the waist of the human body, or can provide support for the back and waist of the human body. In addition, the backrest 1 can also be a multi-body structure, i.e., the number of bodies is more than one, for example, the backrest 1 is a double-body structure, specifically, the backrest 1 has a first backrest body and a second backrest body, and the first backrest body and the second backrest body are arranged in sequence in the longitudinal direction of the seat, the first backrest body can provide support for the back of the human body, and the second backrest body can provide support for the waist of the human body. Alternatively, the first backrest body and the second backrest body can also be arranged in sequence in the transverse direction of the seat. This is only exemplary and not limiting.

[0053] The linkage bracket 2, as the basis of the backrest assembly, is located on one side of the backrest 1 and is rotationally connected to the base 500 of the seat, so that the linkage bracket 2 can rotate relative to the base 500 and cooperate with the backrest 1 to provide support for the back and / or waist of the human body. The linkage bracket 2 has a generally rod-shaped outer shape and extends in the longitudinal direction of the seat, and its shape can adopt various shapes such as arc, S shape, L shape, etc., which can be set according to actual structural requirements. In order to ensure sufficient support strength, the linkage bracket 2 can be made of metal (such as steel, aluminum alloy, etc.), plastic, etc. The linkage bracket 2 can be a single-body structure, or a double-body or multi-body structure, and can be integrally formed as a single body or spliced as a multi-body. Among them, the rotational connection structure between the linkage bracket 2 and the base 500 can be that the linkage bracket 2 is provided with a hinge shaft through the base 500 to realize rotational connection with the base 500. Further, the linkage bracket 2 can be fixedly connected with a rotating piece, and the rotating piece is sleeved on the hinge shaft to form a rotatable connection relationship between the linkage bracket 2 and the base 500. This is only exemplary and not limiting.

[0054] When the backrest 1 is subjected to an external force towards the rear side of the seat (the direction in which the backrest 1 faces the linkage bracket 2) or an external force is applied to the linkage bracket 2 towards the rear side of the seat, because the backrest 1 and the linkage bracket 2 are connected by the first support member 3, the backrest 1 and the linkage bracket 2 can transmit force through the first support member 3, and the linkage bracket 2 can be rotated relative to the base 500 towards the rear side of the seat, while driving the backrest 1 to rotate towards the rear side of the seat. The external force towards the rear side of the seat applied to the backrest 1 or the linkage bracket 2 can be pressure applied by the user to the backrest 1 or the linkage bracket 2, or driving force applied by a driving element such as a motor or a pneumatic cylinder arranged on the seat. When the user leans back / lies back, pressure is applied to the backrest 1 towards the rear side of the seat, and the backrest 1 can be rotated towards the rear side of the seat along with the linkage bracket 2, and because the backrest 1 and the linkage bracket 2 are connected by the first support member 3, one end of the first support member 3 is movably connected to the backrest 1, and the other end is rotatably connected to the linkage bracket 2, when the backrest 1 or the linkage bracket 2 is subjected to an external force towards the rear side of the seat, the backrest 1 can move relative to the linkage bracket 2.

[0055] One end of the first support member 3 is movably connected to the backrest 1, and the form of the movable connection includes but is not limited to rotary connection, sliding connection (such as a sliding groove and sliding shaft cooperation arranged at the connection between the first support member 3 and the backrest 1 to realize sliding) or connecting rod connection, and one end of the first support member 3 can be directly movably connected to the backrest 1, or movably connected to the backrest 1 through an intermediate piece. The other end of the first support member 3 is rotatably connected to the linkage bracket 2, and the rotatable connection between the other end of the first support member 3 and the linkage bracket 2 can be direct rotary connection, or rotary connection through an intermediate piece. The linkage bracket 2 and the backrest 1 form a linkage relationship through the first support member 3.

[0056] When the backrest 1 is subjected to an external force towards the rear side of the seat, the linkage bracket 2 rotates relative to the base 500 towards the rear side of the seat. The external force towards the rear side of the seat applied to the backrest 1 can be pressure applied by the user to the backrest 1, or driving force applied by a driving element such as a motor or a pneumatic cylinder arranged on the seat. For example, when the user leans back / lies back, pressure is applied to the backrest 1 towards the rear side, and through the linkage relationship formed by the linkage bracket 2, the backrest 1 and the first support member 3, the linkage bracket 2 can be rotated relative to the base 500 towards the rear side of the seat, while driving the backrest 1 to rotate towards the rear side of the seat. Alternatively, the linkage bracket 2 can be subjected to an external force towards the rear side of the seat, which can be achieved by driving force applied by a driving element such as a motor or a pneumatic cylinder arranged on the seat, or by external force applied by the user.

[0057] Similarly, when the backrest 1 or the linkage bracket 2 is subjected to an external force in the forward direction, the external force in the forward direction causes the backrest 1 to rotate with the linkage bracket 2 in the forward direction of the seat, or the external force in the forward direction directly acts on the linkage bracket 2 to cause the linkage bracket 2 to rotate in the forward direction of the seat, and the linkage bracket 2 drives the backrest 1 to rotate forward.

[0058] The backrest 1 and the linkage bracket 2 can move relatively, for example, the relative movement state of the two can be that the first support member 3 and the backrest 1 move relatively, which can be relative sliding, relative rotation, relative sliding and rotation, etc.; the first support member 3 and the linkage bracket 2 rotate relatively. That is, the backrest 1 can move relatively with the linkage bracket 2 through the first support member 3 to automatically adjust the position to adapt to the user's sitting posture.

[0059] Meanwhile, the second support member 4 includes but is not limited to the following states:

[0060] First, one end of the second support member 4 is rotationally connected to the first support member 3, and the other end of the second support member 4 is connected to the base 500, so that when the linkage bracket 2 moves or the backrest 1 moves relative to the linkage bracket 2, the first support member 3 rotates relative to the linkage bracket 2 or moves relative to the backrest 1, and the second support member 4 can be connected to the base 500 through the rotation connection with the first support member 3, so as to support the first support member 3 and in turn support the backrest 1 without limiting the rotation of the first support member 3 relative to the linkage bracket 2 or the movement of the backrest 1.

[0061] Second, one end of the second support member 4 is rotationally connected to the backrest 1, and the other end is connected to the base 500, so that the second support member 4 directly supports the backrest 1, and when the linkage bracket 2 rotates to drive the backrest 1 to move or the backrest 1 moves relative to the base 500 or the linkage bracket 2, the backrest 1 and the second support member 4 can rotate relatively.

[0062] That is, since the connection relationship between the first support member 3 and the backrest is movable, and the linkage bracket 2 is rotationally connected, the mechanism composed of the backrest 1, the first support member 3 and the linkage bracket 2 is a free mechanism, so the second support member 4 is further provided as a support basis for the first support member 3 and / or the backrest 1, so that the backrest 1 can maintain a stable state relative to the base 500 and / or the linkage bracket 2 when the backrest 1 and / or the linkage bracket 2 is not subjected to an external force, so that the backrest 1, the first support member 3, the linkage bracket 2 and the second support member 4 form a relatively stable linkage mechanism when not subjected to an external force, and when subjected to an external force, the backrest 1 and / or the linkage bracket 2 can move in a predetermined direction / trajectory.

[0063] In conclusion, the backrest assembly of the seat, the backrest 1 is connected with the linkage support 2 through the first supporting member 3, one end of the first supporting member 3 is movably connected with the backrest 1, and the other end of the first supporting member 3 is rotatably connected with the linkage support 2; one end of the second supporting member 4 is rotatably connected with the first supporting member 3 or the backrest 1, and the other end of the second supporting member 4 is connected with the base 500; the backrest 1, the linkage support 2, the first supporting member 3, the second supporting member 4 and the base 500 form a relatively stable linkage mechanism, so that when the backrest 1 is subjected to pressure towards the rear side of the seat, the backrest 1 can move (slide, rotate, slide and rotate) relative to the first supporting member 3, the linkage support 2 and / or the base 500 through the movable connection between the first supporting member 3 and the backrest 1; when the backrest 1 or the linkage support 2 is subjected to pressure towards the rear side of the seat and the linkage support 2 rotates relative to the base 500, the linkage support 2 can drive the backrest to move relative to the base through the movable connection between the first supporting member 3 and the backrest 1 and the rotary connection of the linkage support 2, and meanwhile, the second supporting member 4 is rotatably connected with the first supporting member 3 or the backrest 1, and the other end is connected with the base 500, so that the first supporting member 3 or the backrest 1 can also rotate relative to the first supporting member 3 or the backrest 1 when supporting the first supporting member 3 or the backrest 1. Similarly, when the backrest 1 or the linkage support 2 is subjected to external force towards the front side of the seat, the linkage support 2 rotates towards the front side of the seat, the backrest 1 rotates towards the front side of the seat following the linkage support 2, and the backrest 1 can move (slide, rotate, slide and rotate) relative to the first supporting member 3, the linkage support 2 and / or the base 500. Through the above arrangement, when the user uses the seat and the user's back and / or waist exerts force on the backrest 1 to adjust the sitting posture, the backrest 1 can adaptively move following the adjustment of the user's sitting posture, so as to better fit the user's back and / or waist, better support the user's back and / or waist, reduce the pressure on the user's back and / or waist, and improve the use comfort of the seat.

[0064] Referring to Figure 1 and Figure 2 , as a preferred scheme of the above-mentioned embodiment, in some embodiments, one end of the first supporting member 3 is rotatably connected with the backrest 1.

[0065] In this embodiment, one end of the first supporting member 3 is rotatably connected with the backrest 1, and the other end is rotatably connected with the linkage support 2.

[0066] As described in the foregoing embodiments, when the backrest 1 is subjected to an external force towards the rear side of the seat, the backrest 1 can move relative to the linkage bracket 2, when the backrest 1 / linkage bracket 2 is subjected to an external force towards the rear side of the seat to rotate the linkage bracket 2 towards the rear side of the seat relative to the base 500, the backrest 1 rotates towards the rear side of the seat along with the linkage bracket 2, and the backrest can also move relative to the linkage bracket 2. When the user leans back / reclines, the pressure is applied to the backrest 1 towards the rear side of the seat, and the backrest 1 can rotate relative to the linkage bracket 2, and can also rotate towards the rear side of the seat along with the linkage bracket 2.

[0067] When the user applies pressure to the backrest 1, the backrest 1 can rotate relative to the linkage bracket 2, and the rotation can adaptively adjust the angle and / or position of the backrest 1 according to the user's back and / or waist curve and / or position, when the user's pressure causes the linkage bracket 2 to rotate towards the rear side of the seat relative to the base 500, the backrest 1 tilts towards the rear side of the seat along with the linkage bracket 2 through the connection of the first support member 3, the first support member 3 rotates relative to the backrest 1 and / or the linkage bracket 2, and the backrest 1 rotates relative to the linkage bracket 2 and / or the base 500, thereby adjusting the position and / or angle of the backrest 1, and providing better support for the user's back and / or waist through the adjustment of the position and / or angle of the backrest 1, and maximizing the adaptive activity of the backrest 1 according to the user's sitting posture.

[0068] It can be envisaged that the rotatable connection of one end of the first support member 3 to the backrest 1 can be that the first support member 3 is directly hinged to the backrest 1, or indirectly rotatably connected through an intermediate piece, for example, using a universal ball or a rotating shaft kit to connect the two.

[0069] In a preferred embodiment, the first support member 3 is a connecting rod, one end of the connecting rod is rotatably connected to the backrest 1, and the other end of the connecting rod is rotatably connected to the linkage bracket 2.

[0070] In another preferred embodiment, the first support member 3 comprises a driving member 31, the driving member 31 comprises an output end 311 and a connecting end 312, one of the output end 311 and the connecting end 312 is rotatably connected to the backrest 1, and the other of the output end 311 and the connecting end 312 is rotatably connected to the linkage bracket 2.

[0071] The driving member 31 is used to drive at least part of the backrest 1 to approach or move away from the linkage bracket 2.

[0072] In the above preferred embodiment, when the first support member 3 is a connecting rod, a linkage mechanism is formed between the first support member 3, the second support member 4, the backrest 1 and the linkage support 2, so that when a pressure is applied to the backrest 1 / linkage support 2 towards the rear side of the seat or the user leans back / reclines on the seat, the backrest 1 can be adaptively adjusted in position and / or angle by the first support member 3 and the second support member 4 relative to the linkage support 2 to adapt to the change in the sitting posture of the user, thereby providing more comfortable support.

[0073] When the first support member 3 includes a driving member 31, unlike the above-mentioned scheme in which the first support member 3 is a connecting rod, the driving member 31 includes an output end 311 and a connecting end 312, one of the output end 311 and the connecting end 312 is rotatably connected to the backrest 1, and the other of the output end 311 and the connecting end 312 is rotatably connected to the linkage support 2, the driving member 31 can provide a driving force to make the output end 311 extend or retract, change the distance between the output end 311 and the connecting end 312, so that at least part of the backrest 1 can be away from or close to the back of the user, provide different degrees of support, and the user can customize the distance of the output end 311 extending / retracting according to the curve of the back and / or waist of the user or according to the flexibility of the back and / or waist of the user, as needed, to achieve different degrees of support of the backrest 1 to the back and / or waist of the user, in addition, the backrest 1 and the linkage support 2 are connected by the rotation of the first support member 3, when the backrest 1 is close to or away from the back of the user, the backrest 1 can be adaptively rotated relative to the linkage support 2 to provide more conformable support. For example, the driving member 31 is a driving cylinder, the output end 311 of the driving member 31 is arranged at the connecting end of the extensible piston rod and the backrest 1, the driving member 31 provides a driving force to make the piston rod extend, the output end 311 moves towards the connecting end 312 connected to the linkage support 2, so that the backrest 1 moves towards the direction close to the back of the user, that is, in this preferred embodiment, the driving member 311 of the first support member 3 not only can act as a connecting rod, but also has a larger adjustment range of the backrest 1 compared with the scheme in which the first support member 3 is a connecting rod, so that the backrest 1 can be adjusted in a larger range of angle and / or position relative to the linkage support 2 by the first support member 3 and the second support member 4, to better adapt to the position / curve of the back and / or waist of the user, provide more conformable support effect, and the user can customize the length of the piston rod extending / retracting according to the curve of the back and / or waist of the user (i.e. adjust the support of the backrest 1 to the back and / or waist), to provide more comfortable support and adaptive adjustment.

[0074] The driving member 31 can drive at least part of the backrest 1 to approach or move away from the linkage support, i.e. drive at least part of the backrest 1 to move away from or approach the direction in which the back of the human body is located.

[0075] Specifically, the backrest 1 can be divided into a waist support part and a back support part, and the driving member 31 can drive the waist support part and / or the back support part to approach or move away from the back of the human body.

[0076] In some embodiments, the driving member 31 of the first support member 3 can also be connected to the linkage support 2 through the intermediate member, preferably, as shown in Figure 3 and Figure 4 The first support member 3 according to the embodiments of the present application further comprises a mounting seat 32 connected to the connecting end 312 of the driving member 31, wherein:

[0077] The mounting seat 32 is rotatably connected to the linkage support 2; and / or the second support member 4 is rotatably connected to the mounting seat 32.

[0078] As the rotatable connection mode between the mounting seat 32 and the linkage support 2, preferably, the mounting seat 32 is configured with a first rotating part, the linkage support 2 is configured with a second rotating part matched with the first rotating part, and the mounting seat 32 is rotatably connected to the linkage support 2 through the cooperation of the first rotating part and the second rotating part.

[0079] Optionally, the first rotating part and the second rotating part can be hinged, so that the mounting seat 32 can be hinged to the linkage support 2. Similarly, the second support member 4 and the mounting seat 32 can also be connected in a hinged manner. The mounting seat 32 as an intermediate member, on the one hand, serves as a mounting base for stable installation of the driving member 31, and on the other hand, facilitates the rotatable connection with the linkage support 2 and / or the second support member 4, and serves as a rotating base.

[0080] In some embodiments, referring to Figures 5 to 8 The backrest 1 and / or the linkage support 2 according to the embodiments of the present application are provided with a first matching structure 11, the first support member 3 is provided with a second matching structure 12 matched with the first matching structure 11, and the first matching structure 11 is rotatably connected to the second matching structure 12.

[0081] The first matching structure 11 can be integrally provided with the backrest 1 and / or the linkage support 2, or can be separately provided, and similarly, the second matching structure 12 can be integrally provided with the first support member 3 or can be separately provided.

[0082] The first matching structure 11 and the second matching structure 12 can be directly hinged, or can be connected through a spherical joint; or can be connected through a circular guide rail, one of the two can rotate on the circular guide rail, so that the backrest 1 rotates relative to the linkage support 2.

[0083] As a preferred mode, one of the first matching structure 11 and the second matching structure 12 is a containing groove, and the other is a containing member rotatable in the containing groove.

[0084] The accommodating groove (the first matching structure 11) is designed as a generally concave structure, which can accommodate the accommodating member (the second matching structure 12) and provide a relatively constrained movement track for the accommodating member. The accommodating member is generally matched with the concave structure. It should be noted that the accommodating member can rotate in the accommodating groove, and at the same time, the accommodating member can also slide in the accommodating groove, so as to realize the rotating (and / or sliding) matching of the accommodating member and the accommodating groove. The accommodating member can be a ball connecting member or a similar spherical connecting member or an elastic member, which can freely rotate (and / or slide) in the accommodating groove and provide multi-directional movement capability.

[0085] In the assembly process, the accommodating member can be inserted into the accommodating groove. The structure of the accommodating groove can be designed to limit the accommodating member in the accommodating groove to avoid falling off.

[0086] For example, the backrest is provided with the first matching structure 11, and the first support member 3 is provided with the second matching structure 12. The first matching structure 11 is a ball connecting member or an elastic silica gel, and the second matching structure 12 is an accommodating groove. The ball connecting member or the elastic silica gel is matched with the accommodating groove to realize the rotatable connection. It should be noted that when the elastic silica gel is used, the elastic silica gel has a certain elasticity, which can enable the backrest 1 and / or the linkage support 2 to realize the rotatable connection with the first support member 3 and also realize the small-range sliding, so as to realize the self-adaptive adjustment of the backrest 1 to enable the backrest 1 to provide better fitting.

[0087] When the backrest 1 is subjected to the pressure applied by the user or the external force applied to the backrest 1 / linkage support 2 towards the rear side of the seat, the backrest 1 moves relative to the linkage support 2 and / or the base 500, and the relative rotation (and / or sliding) of the accommodating member in the accommodating groove occurs. Since the design of the accommodating member allows free movement in multiple dimensions, the inclination or self-adaptive adjustment of the backrest 1 can enable the accommodating member to slide and / or rotate in the accommodating groove, so that the backrest 1 can automatically adjust the angle and / or position of the backrest 1 to adapt to the change of the sitting posture of the user.

[0088] In some embodiments, referring to Figure 9 , the backrest assembly further comprises an adapter 6 having a first connecting portion 61 for connecting the backrest 1 and a second connecting portion 62 for connecting the first support member 3, wherein:

[0089] The first connecting portion 61 movably connects the backrest; or

[0090] The second connecting portion 62 movably connects the first support member 3.

[0091] In this embodiment, as one of the specific implementations that the first support member 3 movably connects the backrest 1, the first support member 3 can indirectly movably connect the backrest 1 through the adapter 6 as an intermediate member. The forms of the movable connection include but are not limited to the following forms:

[0092] Firstly, the first connecting part 61 of the adapter 6 is rotationally connected with the backrest 1, and the second connecting part 62 is fixedly connected with the first support member 3.

[0093] When the backrest 1 is subjected to an external force towards the rear side of the seat, for example, when a user leans against the backrest 1 and leans back / lies back, the backrest 1 and the first connecting part 61 can relatively rotate, and since the second connecting part 62 of the adapter 6 is connected with the linkage bracket 2 through the first support member 3, that is, the backrest 1 and the linkage bracket 2 / the first support member 3 can relatively rotate through the adapter 6.

[0094] Secondly, the first connecting part 61 of the adapter 6 is fixedly connected with the backrest 1, and the second connecting part 62 is rotationally connected with the first support member 3.

[0095] When the backrest 1 is subjected to an external force towards the rear side of the seat, for example, when a user leans against the backrest 1 and leans back / lies back, the second connecting part 62 and the first support member 3 can relatively rotate, and since the first connecting part 61 of the adapter 6 is connected with the backrest 1, that is, the backrest 1 and the linkage bracket 2 / the first support member 3 can relatively rotate through the adapter 6.

[0096] Thirdly, the first connecting part 61 of the adapter 6 is slidingly connected with the backrest 1, and the second connecting part 62 is fixedly connected with the first support member 3.

[0097] When the backrest 1 is subjected to an external force towards the rear side of the seat, for example, when a user leans against the backrest 1 and leans back / lies back, the backrest 1 and the first connecting part 61 can relatively slide, and since the backrest 1 is connected through the adapter 6 and the first support member 3, the backrest 1 and the linkage bracket 2 / the first support member 3 can relatively slide through the adapter 6.

[0098] Fourthly, the first connecting part 61 of the adapter 6 is fixedly connected with the backrest 1, and the second connecting part 62 is slidingly connected with the first support member 3.

[0099] When the backrest 1 is subjected to an external force towards the rear side of the seat, for example, when a user leans against the backrest 1 and leans back / lies back, the backrest 1 and the second connecting part 62 can relatively slide, and since the backrest 1 is connected through the adapter 6 and the first support member 3, the backrest 1 and the linkage bracket 2 / the first support member 3 can relatively slide through the adapter 6.

[0100] Fifthly, the first connecting part 61 of the adapter 6 is slidingly and rotationally connected with the backrest 1, and the second connecting part 62 is fixedly connected with the first support member 3.

[0101] When the backrest 1 is subjected to an external force towards the rear side of the seat, for example, when a user leans against the backrest 1 and leans back / lies back, the backrest 1 and the first connecting part 61 can slide and rotate relative to each other. For example, the backrest 1 and the first connecting part 61 are connected by a sliding groove and a sliding shaft to realize sliding and rotation. Since the backrest 1 is connected to the first support member 3 through the adapter 6, the backrest 1 and the first support member 3 can slide and rotate relative to each other through the adapter 6.

[0102] Sixthly, the first connecting part 61 of the adapter 6 is fixedly connected to the backrest 1, and the second connecting part 62 is slidably and rotatably connected to the first support member 3.

[0103] When the backrest 1 is subjected to an external force towards the rear side of the seat, for example, when a user leans against the backrest 1 and leans back / lies back, the backrest 1 and the second connecting part 62 can slide and rotate relative to each other. For example, the backrest 1 and the second connecting part 62 are connected by a sliding groove and a sliding shaft to realize sliding and rotation. Since the backrest 1 is connected to the first support member 3 through the adapter 6, the backrest 1 and the first support member 3 can slide and rotate relative to each other through the adapter 6.

[0104] Preferably, the first connecting part 61 is rotatably connected to the backrest 1, and the second connecting part 62 is fixedly connected to the output end 311 of the driving part 31 of the first support member 3.

[0105] In some embodiments, referring to Figure 9 , the first connecting part 61 and the second connecting part 62 of the adapter 6 are arranged at an angle.

[0106] In this embodiment, the first connecting part 61 and the second connecting part 62 are arranged at an angle, specifically, an angle towards the backrest 1. The angle is in the range of 90°-180°, preferably, the angle is 110°, 120°.

[0107] The first connecting part 61 and the second connecting part 62 are arranged at an angle, which has the following effects:

[0108] Firstly, the angle provides a transition for the connection between the first support member 3 and the backrest 1.

[0109] Secondly, the angle helps to improve the force transmission between the backrest 1 and the first support member 3. Due to the differentiated angles of the two connecting parts, the external force (such as the user's back pressure) on the backrest 1 can be more reasonably transmitted to the first support member. This reduces concentrated stress and reduces the risk of structural damage, while improving the stability of the support.

[0110] Third, to meet the ergonomic needs. The setting of the included angle enables the adapter to adapt to the body shape and sitting posture needs of different users. When users of different body shapes change their sitting posture, the design of the included angle enables the backrest 1 to better fit the curve of the user's back when the backrest 1 rotates relative to the base 500, providing a more personalized user experience, improving the comfort of the seat, and meeting the needs of a wide range of users.

[0111] In some embodiments, as another form of movable connection of the first support member 3 and the backrest 1, the backrest assembly proposed in the embodiments of the utility model further comprises an elastic member for connecting the first support member 3 and the backrest 1.

[0112] In the embodiments, the design of the elastic member provides a flexible and elastic connection mode, so that the backrest 1 can move relative to the first support member 3 when subjected to external force. The material and structure of the elastic member can adapt to the change of the user's sitting posture to some extent, improving the support effect and comfort of the backrest 1 when the user adjusts the sitting posture such as leaning back or lying back.

[0113] The elastic member not only serves as a connecting component, but also plays a role in absorbing impact and buffering pressure. When the user leans against the backrest 1, the elastic member can absorb part of the external force to provide a certain buffering effect for the user's back, improving the comfort of the backrest 1.

[0114] The types and implementation modes of the elastic member include but are not limited to the following types:

[0115] First, a silica gel elastic member. Silica gel material has good elasticity and flexibility, and can be made into a specific shape to adapt to the connection between the backrest and the support member.

[0116] For example, the silica gel elastic member can be directly embedded between the first support member 3 and the backrest 1 as an intermediate connecting layer, so that the backrest can adjust the angle and / or position to adaptively support the user's back when the user tilts or changes the sitting posture to adapt to the movement change of the backrest 1 relative to the linkage bracket 2. The silica gel elastic member can be compressed or deformed under the action of force, thereby realizing the corresponding movable connection and allowing the backrest 1 to move relative to the linkage bracket 2 within a certain range.

[0117] Second, a spring. The spring is usually made of metal material and has good durability and elasticity, and can be compressed or stretched to adapt to different loading conditions. The spring can be arranged between the first support member 3 and the backrest 1, and the compression and expansion of the spring are used to realize the dynamic connection of the two.

[0118] When the user leans back on the backrest, the spring will be compressed, generating a corresponding reaction force, and at the same time, the spring can maintain a certain tension when supporting the backrest 1, ensuring that the backrest 1 can lean back within a comfortable range without tilting too much.

[0119] The design of the elastic member can increase the freedom of movement between the backrest 1 and the first support member 3, so as to adapt to different sitting postures of the user. Moreover, the characteristics of absorbing impact and pressure enable the user to have a more comfortable experience when changing the sitting posture and reduce fatigue caused by improper sitting posture.

[0120] Whether it is a silica gel elastic member or a spring, they can effectively disperse the pressure from the user, reduce the local excessive load, thereby reducing the risk of structural damage, and the elastic member can adapt to individual differences of different users, whether it is body shape, sitting posture or habit, so that the backrest 1 can adaptively move to provide corresponding support, thereby enhancing the comfort of the seat.

[0121] In some embodiments, the backrest assembly provided by the embodiments of the present application further comprises a connecting member 7, which is used to connect the first support member 3 and the linkage support 2, wherein:

[0122] One end of the connecting member 7 is rotatably connected to the first support member 3, and the other end is drivingly connected to the linkage support 2.

[0123] In some embodiments, one end of the connecting member 7 is rotatably connected to the first support member 3, and the other end is drivingly connected to the linkage support 2.

[0124] In the above embodiments, one end of the connecting member 7 is rotatably connected to the first support member 3, and the other end is drivingly connected to the linkage support 2. The rotatable connection between the connecting member 7 and the first support member 3 can be direct rotation connection or indirect rotation connection through an intermediate member. The connecting member 7 functions to:

[0125] Since the connection relationship between the first support member 3 and the backrest 1 / linkage support 2 is movable, the mechanism composed of the backrest 1, the first support member 3 and the linkage support 2 is a relatively free mechanism, so a second support member 4 is further provided as a support base of the first support member 3 and / or the backrest 1, so that when the backrest 1 and / or the linkage support 2 are not subjected to external force, the first support member 3 and / or the backrest 1 can be in a relatively stable state relative to the base 500, so that the backrest 1, the first support member 3, the linkage support 2 and the second support member 4 form a relatively stable linkage mechanism. However, the second support member 4 is a support part connected with the base 500, in order to further enhance the stability of the linkage structure, the first support member 3 and the linkage support 2 in the linkage mechanism are further connected by a connecting member 7. The connecting member 7 can support the first support member 3 and the linkage support 2 on the side of the first support member 3 away from the second support member 4. The first support member 3, the second support member 4 and the connecting member 7 constitute a linkage mechanism that more stably connects the backrest 1, the linkage support 2 and the base 500.

[0126] As preferred, the connecting member 7 is rotatably connected to the linkage bracket 2, for example, directly hinged to the linkage bracket 2, when the backrest 1 is subjected to an external force towards the rear side of the seat, for example, when a user leans against the backrest 1 and leans back / lay back, the backrest 1 can be rotated with the linkage bracket 2 through the connection of the first support member 3 and the linkage bracket 2, and the connecting member 7 rotates relative to the linkage bracket 2 with the movement of the first support member 3 and / or the linkage bracket 2.

[0127] Alternatively, the connecting member 7 is slidably connected to the linkage bracket 2, for example, by providing a sliding block and slidably connecting the sliding block to the linkage bracket 2, and the connecting member 7 is connected to the sliding block, when the backrest 1 is subjected to an external force towards the rear side of the seat, for example, when a user leans against the backrest 1 and leans back / lay back, the backrest 1 can be rotated with the linkage bracket 2 through the connection of the first support member 3 and the linkage bracket 2, and the connecting member 7 slides relative to the linkage bracket 2 with the movement of the first support member 3 and / or the linkage bracket 2.

[0128] In some embodiments, referring to Figure 10 As another support form of the second support member 4 to the backrest 1, the second support member 4 is rotatably connected to the backrest 1 at one end and fixedly connected to the base at the other end.

[0129] In this embodiment, one end of the first support member 3 is rotatably connected to the backrest 1, and the other end is rotatably connected to the linkage bracket 2, and the second support member 4 and the first support member 3 can be spaced apart in the vertical direction of the linkage bracket 2 or the front-rear direction of the seat.

[0130] As described in the foregoing embodiments, the second support member 4 functions to directly or indirectly support the backrest 1, so the second support member 4 can also be directly connected to the backrest 1, rather than being rotatably connected to the first support member 3 as described in the foregoing embodiments.

[0131] The rotatable connection between the second support member 4 and the backrest 1 can refer to the foregoing examples of the rotatable connection between the first support member 3 and the backrest 1, which will not be described here.

[0132] For example, when a pressure is applied to the backrest 1 or the linkage bracket 2 towards the rear side of the seat, the backrest 1 moves relative to the linkage bracket 2 and / or the base 500 through the connection of the first support member 3 and the second support member 4, when the linkage bracket 2 rotates relative to the base 500 towards the rear side, the backrest 1 follows the linkage bracket 2 to rotate towards the rear side of the seat, and the backrest 1 rotates relative to the linkage bracket 2 and / or the base 500 through the rotatable connection of the first support member 3 and the second support member 4.

[0133] In the embodiment described above, the second support member 4 connects the backrest 1 and the base 500. The base 500, also referred to as a chassis, serves as the foundation of the entire seat structure, bearing the weight of the human body and various pressures that may be generated during use, and has sufficient strength and stability. Furthermore, the base 500 is a key component that connects the seat body (such as the linkage bracket 2, the seat cushion, etc.), and it combines various components together through a specific connection method (such as fixed connection, rotary connection, etc.) to form a complete seat structure. Among them, the seat cushion is usually arranged on the base, and when a person sits on the seat, the buttocks are in contact with the seat cushion, and the seat cushion provides support for the hips and thighs of the human body. In this embodiment, the base 500 can be considered as a separate chassis (the support foundation of the seat), or it can refer to the seat cushion (or seat pad) part, or it can be a structure integrating the base and the seat cushion, that is, one end of the second support member 4 can be fixedly connected with the base, or it can be fixedly connected with the seat cushion, or it can be connected with a structure integrating the base and the seat cushion. Here, no limitation is made.

[0134] Further, with reference to Figure 1 The utility model provides a seat, including seat body 800, install in seat body 800's base 500 and install in seat body 800's like the backrest subassembly of preceding described embodiment. Among them, the base 500 and backrest subassembly are connected through linkage bracket 2 in backrest subassembly rotary.

[0135] The above-mentioned is only part or preferred embodiment of the utility model, and therefore cannot limit the scope of protection of the utility model, whether it is text or drawing, the equivalent structural transformation made by using the contents of the utility model specification and drawings, or direct / indirect application in other related technical fields are included in the scope of protection of the utility model.

Claims

1. A backrest assembly for use in a seat, characterized in that The backrest assembly comprises: a backrest; a linkage bracket located at one side of the backrest and rotatably connected to a base of the seat; a first support member, one end of the first support member movably connected to the backrest, the other end of the first support member rotatably connected to the linkage bracket; a second support member, one end of the second support member rotatably connected to the first support member or the backrest, the other end of the second support member connected to the base; a connecting member for connecting the first support member and the linkage bracket, one end of the connecting member rotatably connected to the first support member, the other end of the connecting member drivingly connected to the linkage bracket.

2. The backrest assembly of claim 1, wherein One end of the first support member is rotatably connected to the backrest.

3. The backrest assembly of claim 2, wherein, The first support member is a connecting rod, one end of the connecting rod rotatably connected to the backrest, the other end of the connecting rod rotatably connected to the linkage bracket.

4. The backrest assembly of claim 2, wherein, The first support member comprises a driving member, the driving member comprising an output end and a connecting end, one of the output end and the connecting end rotatably connected to the backrest, the other of the output end and the connecting end rotatably connected to the linkage bracket; wherein the driving member is used to drive at least part of the backrest to approach or move away from the linkage bracket.

5. The backrest assembly of claim 4, wherein, The first support member further comprises a mounting seat connected to the connecting end of the driving member, wherein: the mounting seat is rotatably connected to the linkage bracket; and / or the second support member is rotatably connected to the mounting seat.

6. The backrest assembly of claim 5, wherein, The mounting seat is configured with a first rotating part, the linkage bracket is configured with a second rotating part matched with the first rotating part, and the mounting seat is rotatably connected to the linkage bracket through the cooperation of the first rotating part and the second rotating part.

7. The backrest assembly of claim 2, wherein, The backrest and / or the linkage bracket are provided with a first matching structure, and the first support member is provided with a second matching structure matched with the first matching structure, wherein: the first matching structure is rotatably connected to the second matching structure; and / or one of the first matching structure and the second matching structure is a receiving groove, and the other is a receiving member rotatable in the receiving groove.

8. The backrest assembly of claim 1, wherein, The backrest assembly further comprises an adapter, the adapter having a first connecting part for connecting the backrest and a second connecting part for connecting the first support member, wherein: the first connecting part is movably connected to the backrest; or the second connecting part is movably connected to the first support member.

9. The backrest assembly of claim 8, wherein, The first connecting part and the second connecting part of the adapter are arranged at an included angle.

10. The backrest assembly of claim 1, wherein, The backrest assembly further comprises an elastic member for connecting the first support member and the backrest.

11. The backrest assembly of any of claims 2-9, wherein, One end of the second support member is fixedly connected to the base, and the other end is rotatably connected to the backrest.

12. A seat, characterized by The backrest assembly comprises a seat body, a base mounted on the seat body, and a backrest assembly as claimed in any one of claims 1 to 11 mounted on the seat body.

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