Backrest assembly and seat

Abstract

The utility model discloses a backrest assembly which comprises a backrest, a backrest support and a first transmission component, and the backrest support is arranged on one side of the backrest and used for being connected with a base of a seat. One end of the first transmission component is connected with the backrest, and the other end is connected with the backrest bracket; wherein the first transmission component is connected with the backrest or the backrest bracket in a sliding manner, so that the backrest can move relative to the backrest bracket when the backrest is subjected to external force. According to the backrest assembly, the backrest is connected with the backrest support through the first transmission component, and the first transmission component is in sliding connection with the backrest or the backrest support, so that when the backrest is subjected to external force, the backrest can move relative to the first transmission component and / or the backrest support; when the back and / or the waist of the user applies force to the backrest for sitting posture adjustment, the backrest can adaptively move along with sitting posture adjustment of the user, better supporting is achieved, the pressure of the back and / or the waist of the user is reduced, 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 common article in daily life and work, is composed of cushion, backrest and handrail and so on many parts. Backrest as the part of providing human back support can maintain the sitting posture of user, alleviates the pressure of cervical vertebra, back and / or waist.

[0003] When the user sits on the seat, the back is usually leaned on the backrest of the seat. In the related art, the backrest of the seat is fixedly connected on the cushion or the base, and the overall form is a relatively fixed structure. When the sitting posture of the user is adjusted, the backrest and the back of the user will relatively displace and rub, causing some parts of the back and waist of the user to be suspended or not supported enough. The backrest is difficult to adaptively adjust with the adjustment of the sitting posture of the user, and the comfort of using the seat is poor. SUMMARY

[0004] The main purpose of the utility model is to provide a backrest assembly and the seat of application of this backrest assembly, aiming at improving the comfort of the user when using the seat.

[0005] To achieve the above-mentioned purpose, the utility model provides a backrest assembly applied to a seat, which comprises:

[0006] a backrest;

[0007] a backrest support arranged on one side of the backrest and used for connecting a base of the seat;

[0008] a first transmission member, one end of the first transmission member being used for connecting the backrest, and the other end being used for connecting the backrest support;

[0009] The first transmission member is slidably connected with the backrest or the backrest support, so that the backrest can move relative to the backrest support when the backrest is subjected to an external force.

[0010] In some embodiments, the first transmission member comprises:

[0011] a first connecting end slidably connected with the backrest support;

[0012] a second connecting end transmissionally connected with the backrest.

[0013] In some embodiments, the first connecting end comprises a first sliding structure, the backrest support is provided with a second sliding structure matched with the first sliding structure, and the first connecting end is slidably connected with the backrest support through cooperation of the first sliding structure and the second sliding structure.

[0014] In some embodiments, one of the first sliding structure and the second sliding structure is sleeved with the other one.

[0015] The second sliding structure comprises a cavity configured in the backrest support, and the first sliding structure comprises a sliding body matched with the cavity, and the sliding body is slidable relative to the cavity.

[0016] In some embodiments, one of the first sliding structure and the second sliding structure is provided with a sliding groove for slidingly matching with the other one, and the first sliding structure is slidingly matched with the second sliding structure through the sliding groove.

[0017] In some embodiments, the backrest assembly further comprises at least one pulley provided in one of the first sliding structure and the second sliding structure for slidingly matching with the other one.

[0018] In some embodiments, the first transmission member comprises:

[0019] a first connecting end connected with the backrest support;

[0020] a second connecting end slidingly connected with the backrest.

[0021] In some embodiments, the second connecting end is provided with a third sliding structure, the backrest is provided with a fourth sliding structure matched with the third sliding structure, and the second connecting end is slidingly connected with the backrest through the matching of the third sliding structure and the fourth sliding structure.

[0022] In some embodiments, the backrest assembly further comprises a second transmission member provided between the first transmission member and the backrest, and the second transmission member comprises:

[0023] a third connecting end transmissionally connected with the backrest;

[0024] a fourth connecting end hingedly connected with the second connecting end.

[0025] In some embodiments, the second transmission member comprises:

[0026] a first connecting piece, and the third connecting end is provided at one end of the first connecting piece towards the backrest, and the first transmission member is transmissionally connected with the backrest through the first connecting piece.

[0027] In some embodiments, the second transmission member further comprises:

[0028] a second connecting piece, one end of the second connecting piece is movably connected with the first connecting piece, and the other end is movably connected with the backrest.

[0029] In some embodiments, one of the second connectors is provided with a third connector, and the other one is provided with a receiving slot adapted to the third connector, and the second connector is movably connected with the backrest through the cooperation of the third connector and the receiving slot.

[0030] In some embodiments, the third connector comprises:

[0031] a ball connector; or

[0032] a resilient connector.

[0033] Further, the utility model provides a seat which comprises a base of the seat and the backrest assembly of the foregoing embodiments, and the backrest support of the backrest assembly is connected with the base.

[0034] The backrest assembly of the utility model seat, the backrest is connected with the backrest support through the first transmission member, the first transmission member is slidingly connected with the backrest or the backrest support, so that when the backrest is subjected to external force, the backrest and the backrest support transmit force through the first transmission member, the backrest can move relative to the first transmission member and / or the backrest support, in addition, when the backrest or the backrest support is subjected to external force and makes the backrest support rotate relative to the base to the rear side of the seat, the backrest can move towards the rear side of the seat along with the backrest support, and the backrest can move relative to the first transmission member and / or the backrest support, through the above-mentioned setting, when the user uses the seat and the back of the user and / or the waist of the user exerts force on the backrest to adjust the sitting posture, the backrest can adaptively move along with the adjustment of the sitting posture of the user, so that the backrest of the seat and the back of the user reduce relative displacement and friction, better fit the back of the user and / or the waist of the user, better support, reduce the pressure of the back of the user and / or the waist of the user, and improve the use comfort of the seat. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a structural schematic view of an embodiment of the backrest assembly of the utility model;

[0036] Figure 2 It is a front view of an embodiment of the backrest assembly of the utility model;

[0037] Figure 3 It is a sectional view of A-A in the figure; Figure 2

[0038] Figure 4 It is a sectional view of B in the figure; Figure 3

[0039] Figure 5 It is a structural schematic view of the first transmission member of an embodiment of the backrest assembly of the utility model;

[0040] ​​Figure 6 is a structural schematic view of a backrest support of a backrest assembly of the utility model in an embodiment;

[0041] Figure 7 is Figure 6 is an enlarged view of a part at C;

[0042] Figure 8 is a partial structural schematic view of a backrest assembly of the utility model in another embodiment;

[0043] Figure 9 is Figure 8 is an enlarged view of a part at E;

[0044] Figure 10 is Figure 8 is a sectional view at D-D;

[0045] Figure 11 is Figure 10 is an enlarged view of a part at F;

[0046] Figure 12 is a structural schematic view of a second transmission member of a backrest assembly of the utility model in an embodiment;

[0047] Figure 13 is a structural schematic view of a first connecting piece of a backrest assembly of the utility model in an embodiment;

[0048] Figure 14 is a structural schematic view of a second connecting piece of a backrest assembly of the utility model in an embodiment.

[0049] The realization, functional features and advantages of the utility model will be further described with reference to the accompanying drawings in combination with embodiments. DETAILED DESCRIPTION

[0050] The schemes in the embodiments of the utility model will be clearly and completely described in combination with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only some of the 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 fall within the protection scope of the utility model.

[0051] 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.

[0052] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0053] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0054] Reference Figure 1 This utility model embodiment proposes a seat back assembly, comprising:

[0055] Backrest 1;

[0056] Backrest bracket 2, located on one side of backrest 1, is used to connect the seat base 600;

[0057] The first transmission component 3 has one end for connecting to the backrest 1 and the other end for connecting to the backrest bracket 2.

[0058] The first transmission component 3 is slidably connected to the backrest 1 or the backrest support 2 so that the backrest 1 can move relative to the backrest support 2 when the backrest 1 is subjected to an external force.

[0059] In this embodiment, the backrest 1 of the seat generally serves as a support structure for the back and / or waist of the human body. The material used to make the backrest 1 can be nylon, metal, or high-strength plastic, etc., which provide the necessary strength and rigidity to support the back and / or waist of the human body. Simultaneously, a filling layer can be provided on the backrest 1, and then covered by an outer skin. The main function of the filling layer is to provide comfortable support and cushioning; the filling layer can be made of materials such as sponge, foam plastic, or memory foam. The outer skin serves to protect the filling layer and provide aesthetics; it can be fabric, leather, artificial leather, etc., and the choice is based on actual needs and is not limited thereto.

[0060] The backrest 1 can be a single-body structure, i.e., the number of main bodies used to support the back and / or waist of the human body is one, and the backrest 1 is arranged corresponding to the human body part. For example, the backrest 1 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 at the same time. In addition, the backrest 1 can also be a multi-body structure, i.e., the number of main 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 along 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 be arranged in sequence along the transverse direction of the seat. This is only exemplary and is not limiting.

[0061] The backrest support 2 is the basis of the backrest assembly, located on one side of the backrest 1, and can be connected with the base 600 of the seat. The connection between the two can be a rotating connection, so that the backrest support 2 can rotate relative to the base 600, and cooperate with the backrest 1 to provide support for the back and / or waist of the human body. The outer shape of the backrest support 2 is generally rod-shaped, and is arranged to extend along the longitudinal direction of the seat. Its shape can adopt various shapes such as arc, S shape, L shape, etc., and can be set according to actual structural requirements. In order to ensure sufficient support strength, the backrest support 2 can be made of metal (such as steel, aluminum alloy, etc.), plastic or other materials. The backrest support 2 can be a single-body structure, or a double-body or multi-body structure, and can be a single-body integrally formed or a multi-body spliced. This is only exemplary and is not limiting.

[0062] When the backrest 1 is subjected to an external force towards the rear side of the seat (the direction of the backrest 1 towards the backrest support 2), since the backrest 1 is connected with the backrest support 2 through the first transmission member 3, the backrest 1 and the backrest support 2 can transmit force through the first transmission member 3. The first transmission member 3 can slide relative to the backrest 1 or relative to the backrest support 2. It can be understood that the external force acting on the backrest 1 can be directly applied to the backrest 1, or indirectly applied to the backrest support 2 or other components connected with the backrest 1 (such as the first transmission member 3, etc.), thereby causing the backrest 1 to move relative to the backrest support 2. The direction of the external force acting on the backrest 1 can be towards the rear side of the seat (the direction of the backrest 1 towards the backrest support 2), or can be a force applied to the first transmission member 3 in the direction towards the base 600 of the seat, or can be a force applied to the backrest support 2 in the direction opposite to the backrest 1. This is not limited.

[0063] The form of connecting the backrest support 2 with the base 600 of the seat includes movable connection or fixed connection, wherein:

[0064] When the backrest support 2 is movably connected to the base 600, the movable connection can be a rotary connection. When the backrest 1 is subjected to an external force towards the rear side of the seat, the backrest 1 and the backrest support 2 can transmit the force through the first transmission member 3. The external force can cause the backrest support 2 to rotate relative to the base 600, and the backrest 1 and the backrest support 2 can slide relative to each other due to the sliding connection between the first transmission member 3 and the backrest 1 or the backrest support 2. Preferably, the backrest support 2 is rotatably connected to the base 600, so that when the backrest 1 is subjected to an external force towards the rear side of the seat (i.e. in the direction of the backrest 1 towards the backrest support 2) or an external force is applied to the backrest support 2 towards the rear side of the seat, the backrest 1 can rotate with the backrest support 2 relative to the base 600 towards the rear side of the seat. The external force towards the rear side of the seat or the external force applied to the backrest support 2 towards the rear side of the seat can be a pressure applied to the backrest 1 or the backrest support 2 by a user, or a driving force applied to the backrest 1 or the backrest support 2 by a driving element such as a motor or a pneumatic cylinder arranged on the seat. When a user leans back or lies back, a pressure is applied to the backrest 1 towards the rear side of the seat, and the backrest 1 can rotate with the backrest support 2 towards the rear side of the seat, and the backrest 1 can also slide relative to the backrest support 2 due to the sliding connection between the backrest 1 and the backrest support 2 through the first transmission member 3. Similarly, when the backrest 1 or the backrest support 2 is subjected to an external force towards the front side of the seat, the backrest 1 can rotate with the backrest support 2 towards the front side of the seat, and the backrest 1 can slide relative to the backrest support 2 due to the sliding connection between the backrest 1 and the backrest support 2 through the first transmission member 3.

[0065] When the backrest support 2 is fixedly connected to the base 600, the backrest support 2 is fixed relative to the base 600. When the backrest 1 is subjected to an external force, the backrest 1 and the backrest support 2 can transmit the force through the first transmission member 3 due to the sliding connection between the first transmission member 3 and the backrest 1 or the backrest support 2, so that the backrest 1 can slide relative to the backrest support 2.

[0066] One end of the first transmission member 3 is connected to the backrest 1, and the other end is connected to the backrest support 2. The connection between the first transmission member 3 and the backrest 1 and the backrest support 2 can include the following forms:

[0067] First, one end of the first transmission member 3 is slidably connected to the backrest 1, and the other end is fixedly connected to the backrest support 2. When the backrest 1 is subjected to an external force, for example, a pressure applied to the backrest 1 by a user, the backrest 1 and the first transmission member 3 can slide relative to each other, so that the backrest 1 can slide relative to the backrest support 2.

[0068] Secondly, one end of the first transmission member 3 is fixedly connected with the backrest 1, and the other end is slidably connected with the backrest support 2. When the backrest 1 is subjected to an external force, for example, the pressure applied by the user to the backrest 1, the first transmission member 3 and the backrest support 2 can slide relative to each other, so that the backrest 1 connected with the first transmission member 3 can slide relative to the backrest support 2.

[0069] Thirdly, one end of the first transmission member 3 is slidably connected with the backrest 1, and the other end is rotatably connected with the backrest support 2. When the backrest 1 is subjected to an external force, for example, the pressure applied by the user to the backrest 1, the backrest 1 and the first transmission member 3 can slide relative to each other, so that the backrest 1 can slide relative to the backrest support 2, and the first transmission member 3 and the backrest support 2 can rotate relative to each other, so that the backrest 1 and the backrest support 2 can slide and rotate relative to each other.

[0070] Fourthly, one end of the first transmission member 3 is rotatably connected with the backrest 1, and the other end is slidably connected with the backrest support 2. When the backrest 1 is subjected to an external force, for example, the pressure applied by the user to the backrest 1, the first transmission member 3 and the backrest support 2 can slide relative to each other, so that the backrest 1 connected with the first transmission member 3 can slide relative to the backrest support 2, and the backrest 1 and the first transmission member 3 can rotate relative to each other, so that the backrest 1 and the backrest support 2 can slide and rotate relative to each other.

[0071] The above four kinds of structure connection settings are only exemplary and not limited, including but not limited to. The form of the above-mentioned sliding connection, the sliding connection of the first transmission member 3 with the backrest 1 or the backrest support 2 can be directly sliding connection or indirect sliding connection through intermediate parts, for example, direct sliding connection by using sliding block and guide rail, or indirect sliding connection by using connecting rod as intermediate part.

[0072] Optionally, under the above four kinds of sliding connection forms, when the backrest 1 / backrest support 2 is subjected to an external force, the backrest 1 can move relative to the backrest support 2, when the backrest 1 / backrest support 2 is subjected to an external force to make the backrest support 2 rotate relative to the base 600 to the rear side of the seat, the backrest 1 can rotate with the backrest support 2 to the rear side of the seat, or when the backrest 1 or the backrest support 2 is subjected to an external force to the front side of the seat to make the backrest support 2 rotate relative to the base 600 to the front side of the seat, the backrest 1 can rotate with the backrest support 2 to the front side of the seat.

[0073] In summary, the backrest assembly of the seat, the backrest 1 is connected with the backrest support 2 through the first transmission member 3, the first transmission member 3 is slidingly connected with the backrest 1 or the backrest support 2, so that when the backrest 1 is subjected to external force, the backrest 1 can move relative to the first transmission member 3 and / or relative to the backrest support 2 through the sliding connection of the first transmission member 3 with the backrest 1 or the backrest support 2, in addition, when the backrest 1 is subjected to external force towards the rear side of the seat to make the backrest support 2 rotate relative to the base 600 towards the rear side of the seat, the backrest 1 can rotate relative to the base 600 towards the rear side of the seat with the backrest support 2, and at the same time, the backrest 1 can move relative to the backrest support 2, and for the same reason, when the backrest 1 or the backrest support 2 is subjected to external force towards the front side of the seat to make the backrest support 2 rotate relative to the base 600 towards the front side of the seat, the backrest 1 can rotate relative to the base 600 towards the front side of the seat with the backrest support 2, and at the same time, the backrest 1 can move relative to the backrest support 2. Through the above setting, when the user uses the seat and exerts force on the backrest 1 to adjust the sitting posture, the backrest 1 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.

[0074] Referring to Figures 1 to 4 In some embodiments, the first transmission member 3 proposed in the utility model embodiment comprises:

[0075] The first connection end 31 is slidingly connected with the backrest support 2;

[0076] The second connection end 32 is drivingly connected with the backrest 1.

[0077] In the embodiment, as one of the connection modes of the backrest 1 with the backrest support 2 through the first transmission member 3, the first connection end 31 of the first transmission member 3 is slidingly connected with the backrest support 2, and the second connection end 32 of the first transmission member 3 is drivingly connected with the backrest 1, and the form of driving connection can be sliding connection, rotary connection or sliding and rotary connection. The driving connection between the second connection end 32 and the backrest 1 can be direct connection or indirect connection through an intermediate piece. When the user leans back / lay back, the backrest 1 and / or the backrest support 2 is subjected to external force, and the backrest 1 can move relative to the backrest support 2, at this time, the relative movement state of the backrest 1 and the backrest support 2 can be as follows:

[0078] First, the first connection end 31 and the backrest support 2 can slide relative to each other; the second connection end 32 and the backrest 1 can rotate relative to each other.

[0079] When the backrest 1 and / or the backrest support 2 is subjected to an external force, due to the sliding connection between the first connecting end 31 and the backrest support 2, the first transmission member 3 can slide relative to the backrest support 2, that is, the backrest 1 slides relative to the backrest support 2, and at the same time, due to the rotating connection between the second connecting end 32 of the first transmission member 3 and the backrest 1, the backrest 1 can also rotate relative to the first transmission member 3, that is, the backrest 1 can rotate relative to the backrest support 2, so that the backrest 1 can slide and rotate relative to the backrest support 2.

[0080] Secondly, the first connecting end 31 and the backrest support 2 can slide relative to each other; the second connecting end 32 and the backrest 1 can slide relative to each other.

[0081] When the backrest 1 and / or the backrest support 2 is subjected to an external force, due to the sliding connection between the first connecting end 31 and the backrest support 2, the first transmission member 3 can slide relative to the backrest support 2, that is, the backrest 1 slides relative to the backrest support 2, and at the same time, due to the sliding connection between the second connecting end 32 of the first transmission member 3 and the backrest 1, the backrest 1 can also slide relative to the first transmission member 3, that is, the backrest 1 can slide relative to the backrest support 2.

[0082] Thirdly, the first connecting end 31 and the backrest support 2 can slide relative to each other; the second connecting end 32 and the backrest 1 can slide and rotate relative to each other.

[0083] When the backrest 1 and / or the backrest support 2 is subjected to an external force, due to the sliding connection between the first connecting end 31 and the backrest support 2, the first transmission member 3 can slide relative to the backrest support 2, that is, the backrest 1 slides relative to the backrest support 2, and at the same time, due to the sliding and rotating connection between the second connecting end 32 of the first transmission member 3 and the backrest 1, for example, the two are connected through a sliding shaft and a sliding groove, the sliding shaft can slide and rotate relative to the sliding groove, so that the backrest 1 can not only slide relative to the first transmission member 3, but also rotate relative to the first transmission member 3, that is, the backrest 1 can slide and rotate relative to the backrest support 2.

[0084] The above three connection forms are only exemplary and non-limiting, including but not limited to the same. Through the above connection forms, when the backrest 1 / backrest support 2 is subjected to an external force, the backrest 1 can move relative to the backrest support 2, when the backrest 1 / backrest support 2 is subjected to an external force to make the backrest support 2 rotate relative to the base 600 to the rear side of the seat, the backrest 1 can rotate with the backrest support 2 to the rear side of the seat, or when the backrest 1 / backrest support 2 is subjected to an external force to make the backrest support 2 rotate relative to the base 600 to the front side of the seat, the backrest 1 can rotate with the backrest support 2 to the front side of the seat. The backrest 1 can move relative to the backrest support 2 through the above three sliding connection forms to adapt to the user's sitting posture adjustment, so as to better fit the user's back and / or waist, provide better support, reduce the pressure on the user's back and / or waist, and improve the use comfort of the seat.

[0085] Further, with reference to Figures 4 to 7 The first connection end 31 includes a first sliding structure 311, and the backrest support 2 is provided with a second sliding structure 20 matched with the first sliding structure 311, and the first connection end 31 is slidably connected with the backrest support 2 through cooperation of the first sliding structure 311 and the second sliding structure 20.

[0086] In the embodiment, as one of the sliding connection forms of the first connection end 31 and the backrest support 2, the first sliding structure 311 is arranged on the first connection end 31, and the second sliding structure 20 matched with the first sliding structure 311 is arranged on the backrest support 2, that is, the first transmission member 3 is slidably connected with the backrest support 2 through the first sliding structure 311 on the first transmission member 3 and the second sliding structure 20 on the backrest support 2. The first sliding structure 311 and the second sliding structure 20 can include but are not limited to the following forms:

[0087] Firstly, the sliding block and sliding groove structure: the sliding block can be embedded in the sliding groove and slide in the sliding groove. The design structure is simple and stable, and is suitable for bearing smaller force or requiring relative sliding.

[0088] Secondly, the guide rail and sliding block structure: the sliding block slides on the guide rail, and the guide rail and the sliding block structure are similar to the sliding groove and the sliding block, but the guide rail is usually more precise, and is suitable for more precise position control.

[0089] Thirdly, the rolling sliding rail structure: one of the two sliding members is a smooth rod, and the other is a sleeve member slidably matched with the smooth rod through a ball or a roller, the sleeve member can slide relative to the smooth rod, can reduce friction, improve sliding stability and carrying capacity, and is suitable for use in occasions requiring smooth and easy sliding.

[0090] Fourthly, cam groove structure: exemplary, a cam shape is designed on the first sliding structure 311, and a corresponding groove is opened on the second sliding structure 20, the cam and the groove slide relative to each other to make the first connecting end 31 slide relative to the backrest support 2.

[0091] As preferred, one of the first sliding structure 311 and the second sliding structure 20 is sleeved on the other, for example, the first sliding structure 311 is a shaft sleeve, the second sliding structure 20 is a sliding member, the shaft sleeve is sleeved on the sliding member, the shaft sleeve can slide along the sliding member or the sliding member can slide in the shaft sleeve, so that the first sliding structure 311 and the second sliding structure 20 can slide relative to each other, that is, the backrest 1 and the backrest support 2 can slide relative to each other. Optionally, the shaft sleeve can be a ball bearing or a linear bearing, and the sliding member can be an optical axis matched with the ball bearing or the linear bearing. The structure of the sliding member extends in the longitudinal direction of the seat.

[0092] In some embodiments, as preferred, the second sliding structure 20 includes a cavity configured on the backrest support 2, and the first sliding structure 311 includes a sliding body matched with the cavity, and the sliding body can slide relative to the cavity.

[0093] As one of the sleeve connection schemes of the first sliding structure 311 and the second sliding structure 20, the cavity configured on the backrest support 2 can be used as the second sliding structure 20, and the first sliding structure 311 is configured with a sliding body capable of sliding in the cavity. The cavity can extend in the longitudinal direction of the seat.

[0094] The cavity can be an inner cavity hollowly formed in the backrest support 2, and the sliding body can be a structure such as a boss, a bump, a tube, etc. capable of matching with the inner cavity and formed on or mounted on the first sliding structure 311. When the backrest 1 or the backrest support 2 is forced to rotate relative to the base 600, the first sliding structure 311 can slide in the cavity of the second sliding structure 20 on the backrest support 2 through the sliding body thereon, so that the first transmission member 3 can slide relative to the backrest support 2, that is, the backrest 1 connected with the first transmission member 3 can slide relative to the backrest support 2. This sliding can make the backrest 1 adaptively adjust the angle and / or position of the backrest 1 according to the user's posture of using the seat.

[0095] Optionally, when the backrest 1 / backrest support 2 is subjected to an external force to make the backrest support 2 rotate relative to the base 600 to the rear side of the seat, the backrest 1 can rotate with the backrest support 2 to the rear side of the seat, or when the backrest 1 / backrest support 2 is subjected to an external force to make the backrest support 2 rotate relative to the base 600 to the front side of the seat, the backrest 1 can rotate with the backrest support 2 to the front side of the seat, in this process, the first sliding structure 311 can slide in the cavity of the second sliding structure 20 of the backrest support 2 through the sliding body thereof, so that the first transmission member 3 can slide relative to the backrest support 2, that is, the backrest 1 connected with the first transmission member 3 can slide relative to the backrest support 2, and the backrest 1 can move relative to the backrest support 2 through the first transmission member 3 to adapt to the adjustment of the sitting posture of the user, so as to better fit the user's back and / or waist and reduce the friction between the user's back and the backrest.

[0096] Referring to Figures 4 to 7 In some embodiments, one of the first sliding structure 311 and the second sliding structure 20 is provided with a sliding groove 201 for sliding cooperation with the other, and the first sliding structure 311 is slidingly connected with the second sliding structure 20 through the sliding groove 201.

[0097] Optionally, taking the first sliding structure 311 sleeved on the second sliding structure 20 as an example, the first sliding structure 311 is a shaft sleeve, the second sliding structure 20 is a smooth rod which can extend into the shaft sleeve and is slidingly connected with the shaft sleeve, and one of the shaft sleeve and the smooth rod is provided with the sliding groove 201, and the other is provided with a sliding structure matched with the structure of the sliding groove 201, for example, the sliding groove 201 is recessed on the outer wall of the smooth rod, the inner wall of the shaft sleeve is sleeved on the outer wall of the smooth rod, and the inner wall of the shaft sleeve is provided with a protrusion corresponding to the sliding groove 201 recessed on the outer wall of the smooth rod.

[0098] Similarly, the second sliding structure 20 includes a cavity constructed in the backrest support 2, and the first sliding structure 311 includes a sliding body matched with the cavity, and in the scheme that the sliding body can slide relative to the cavity, the inner wall of the cavity is slidingly connected with the outer wall of the sliding body, and the sliding groove 201 can be constructed on the inner wall of the cavity or on the outer wall of the sliding body.

[0099] Further, on the basis of the above-mentioned embodiments, at least one pulley 202 can be arranged on one of the first sliding structure 311 and the second sliding structure 20 for sliding cooperation with the other.

[0100] It can be understood that the function of the pulley 202 is to make the sliding between the first sliding structure 311 and the second sliding structure 20 more smooth and stable. Specifically, the pulley 202 can significantly reduce the frictional resistance between the two, and the use of the pulley reduces the frictional resistance between the sliding parts, making the sliding between the first sliding structure 311 and the second sliding structure 20 more stable and smooth, reducing the phenomenon of jamming and blocking. Moreover, the pulley 202 can reduce the direct friction during the sliding of the first sliding structure 311 and the second sliding structure 20, reduce the wear of the surface of the parts, thereby prolonging the service life of the sliding structure; due to the avoidance of direct friction, the noise can also be reduced to a certain extent, which is helpful to realize a quieter sliding effect, and is suitable for application in occasions with requirements for silence, such as office and learning scenes.

[0101] In some embodiments, as another way of connecting the first transmission member 3 with the backrest support 2 and the backrest 1, the first transmission member 3 comprises:

[0102] a first connecting end 31 connected to the backrest support 2;

[0103] a second connecting end 32 slidingly connected to the backrest 1.

[0104] In this embodiment, the first connecting end 31 of the first transmission member 3 is connected to the backrest support 2, and the connection form can be fixed connection, rotary connection, sliding and rotary connection, preferably, the first connecting end 31 is fixedly connected to the backrest support 2.

[0105] The connection relationship between the first transmission member 3 and the backrest 1 and the backrest support 2 includes but is not limited to the following:

[0106] First, the first connecting end 31 is fixedly connected to the backrest support 2, and the second connecting end 32 is slidingly connected to the backrest 1.

[0107] When the backrest 1 is subjected to an external force, since the second connecting end 32 is slidingly connected to the backrest 1, the backrest 1 can slide relative to the first transmission member 3, and the first transmission member 3 is relatively fixed to the backrest support 2, that is, the backrest 1 can slide relative to the backrest support 2.

[0108] Second, the first connecting end 31 is rotatably connected to the backrest support 2, and the second connecting end 32 is slidingly connected to the backrest 1.

[0109] When the backrest 1 is subjected to an external force, since the first connecting end 31 is rotatably connected to the backrest support 2, the first transmission member 3 can rotate relative to the backrest support 2, that is, the backrest 1 rotates relative to the backrest support 2, and at the same time, since the second connecting end 32 of the first transmission member 3 is slidingly connected to the backrest 1, the backrest 1 can also slide relative to the first transmission member 3, that is, the backrest 1 can slide relative to the backrest support 2, and therefore, the backrest 1 can slide and rotate relative to the backrest support 2.

[0110] Thirdly, the first connecting end 31 is slidingly and rotatably connected to the backrest support 2, and the second connecting end 32 is slidingly connected to the backrest 1.

[0111] When the backrest 1 is subjected to an external force, the first transmission member 3 can slide relative to the backrest 1 due to the sliding connection between the second connecting end 32 and the backrest 1. Meanwhile, the backrest support 2 can slide and rotate relative to the first transmission member 3 due to the sliding and rotating connection between the first connecting end 31 and the backrest support 2, for example, the sliding and rotating connection between the sliding shaft and the sliding groove. Thus, the backrest 1 can slide and rotate relative to the backrest support 2.

[0112] Alternatively, when the backrest 1 / backrest support 2 is subjected to an external force to make the backrest support 2 rotate relative to the base 600 towards the rear side of the seat, the backrest 1 can rotate towards the rear side of the seat along with the backrest support 2. Or, when the backrest 1 / backrest support 2 is subjected to an external force to make the backrest support 2 rotate relative to the base 600 towards the front side of the seat, the backrest 1 can rotate towards the front side of the seat along with the backrest support 2. In this process, the backrest 1 can move relative to the backrest support 2 through the above-mentioned connection forms to adapt to the adjustment of the sitting posture of the user, so as to better fit the user's back and / or waist, reduce the friction between the user's back and the backrest, and improve the comfort of the seat.

[0113] Further, the second connecting end 32 is provided with a third sliding structure, and the backrest 1 is provided with a fourth sliding structure matched with the third sliding structure. The second connecting end 32 is slidingly connected to the backrest 1 through the cooperation between the third sliding structure and the fourth sliding structure.

[0114] As one of the sliding connection forms between the backrest 1 and the first transmission member 3, the third sliding structure and the fourth sliding structure can be provided in the form as described in the first sliding structure 311 and the second sliding structure 20 of the foregoing embodiments, which will not be repeated here.

[0115] For example, a cavity as described in the foregoing embodiments can be provided on the backrest 1 as the fourth sliding structure, or a slide structure equivalent to the cavity. A sliding body as described in the foregoing embodiments can be provided on the second connecting end 32 as the third sliding structure. The second connecting end 32 is slidingly connected to the backrest 1 through the cooperation between the sliding body thereon and the cavity on the backrest 1.

[0116] For example, an inclined slide rail can be provided on the third sliding structure, a sliding groove can be provided on the side of the inclined slide rail facing the backrest 1, and a sliding member slidingly connected to the sliding groove and capable of sliding relative to the sliding groove can be provided on the fourth sliding structure. The sliding track of the sliding groove can be designed to enable the backrest 1 to slide relative to the backrest support 2 in the direction towards the base of the seat when the user applies pressure to the backrest 1.

[0117] When the user exerts a pressure on the backrest 1, the third sliding structure and the fourth sliding structure slide relative to each other, so that the backrest 1 slides relative to the first transmission member 3, that is, the backrest 1 slides relative to the backrest support 2, and the sliding can make the backrest 1 adaptively adjust the angle and / or position of the backrest 1 according to the back and / or waist curve and / or position of the user.

[0118] Optionally, when the backrest 1 / backrest support 2 is subjected to an external force to make the backrest support 2 rotate relative to the base 600 to the rear side of the seat, the backrest 1 can rotate with the backrest support 2 to the rear side of the seat, or when the backrest 1 / backrest support 2 is subjected to an external force to make the backrest support 2 rotate relative to the base 600 to the front side of the seat, the backrest 1 can rotate with the backrest support 2 to the front side of the seat, and in this process, the third sliding structure provided on the second connecting end 32 and the fourth sliding structure on the backrest 1 slide relative to each other, so that the backrest 1 can slide relative to the first transmission member 3, that is, the backrest 1 can slide relative to the backrest support 2 to adaptively move according to the sitting posture of the user, so as to better fit the back and / or waist of the user and reduce the friction between the back of the user and the backrest.

[0119] With reference to Figure 4 , and with reference to Figures 8 to 12 In some embodiments, the backrest assembly provided in the embodiments of the present application further comprises a second transmission member 4 arranged between the first transmission member 3 and the backrest 1, and the second transmission member 4 comprises:

[0120] a third connecting end 401 connected in transmission with the backrest 1;

[0121] a fourth connecting end 402 hingedly connected with the second connecting end 32.

[0122] In the embodiments, the first transmission member 3 and the backrest 1 can be connected in transmission through the second transmission member 4, the second connecting end 32 of the first transmission member 3 connected with the backrest 1 is hingedly connected with the fourth connecting end 402 of the second transmission member 4, that is, the second connecting end 32 and the fourth connecting end 402 can rotate relative to each other. The third connecting end 401 is connected in transmission with the backrest 1, so that the backrest 1 is connected in transmission with the first transmission member 3. The form of connecting the backrest 1 and the first transmission member 3 through the second transmission member 4 includes but is not limited to the following forms:

[0123] First, the third connecting end 401 of the second transmission member 4 is rotatably connected with the backrest 1, and the fourth connecting end 402 is hingedly connected with the second connecting end 32 of the first transmission member 3.

[0124] When the backrest 1 is subjected to external force, for example, when a user leans back against the backrest 1, the third connecting end 401 of the second transmission member 4 can slide relative to the backrest 1, and since the fourth connecting end 402 of the second transmission member 4 is hingedly connected to the second connecting end 32 of the first transmission member 3, the second transmission member 4 can rotate relative to the backrest support 2, i.e., the backrest 1 and the backrest support 2 can rotate relative to each other. Thus, the backrest 1 and the backrest support 2 can rotate and slide.

[0125] Secondly, the third connecting end 401 of the second transmission member 4 is slidingly connected to the backrest 1, and the fourth connecting end 402 is hingedly connected to the second connecting end 32 of the first transmission member 3.

[0126] When the backrest 1 is subjected to external force, for example, when a user leans back against the backrest 1, the third connecting end 401 of the second transmission member 4 can slide relative to the backrest 1, and since the fourth connecting end 402 of the second transmission member 4 is hingedly connected to the second connecting end 32 of the first transmission member 3, the second transmission member 4 can rotate relative to the backrest support 2, i.e., the backrest 1 and the backrest support 2 can rotate relative to each other. Thus, the backrest 1 and the backrest support 2 can rotate and slide.

[0127] Thirdly, the third connecting end 401 of the second transmission member 4 is slidingly and rotatably connected to the backrest 1, and the fourth connecting end 402 is rotatably connected to the second connecting end 32 of the first transmission member 3.

[0128] When the backrest 1 is subjected to external force, for example, when a user leans back against the backrest 1, the third connecting end 401 of the second transmission member 4 can slide and rotate relative to the backrest 1, for example, the backrest 1 and the third connecting end 401 can slide and rotate through the cooperation of a sliding shaft and a sliding groove, and since the fourth connecting end 402 of the second transmission member 4 is rotatably connected to the second connecting end 32 of the first transmission member 3, the second transmission member 4 can rotate relative to the first transmission member 3, i.e., the backrest 1 and the backrest support 2 can rotate relative to each other. Thus, the backrest 1 and the backrest support 2 can rotate and slide.

[0129] Referring to Figures 10 to 14 Preferably, the second transmission member 4 comprises a first connecting piece 41, and the third connecting end 401 is arranged at one end of the first connecting piece 41 facing the backrest 1, and the first transmission member 3 is drivingly connected to the backrest 1 through the first connecting piece 41.

[0130] The third connecting end 401 can be a structure arranged at one end of the first connecting piece 41 facing the backrest 1, or a structure arranged on an intermediate piece arranged separately from the first connecting piece 41.

[0131] Further, the second transmission member 4 further comprises a second connecting piece 42, one end of the second connecting piece 42 is movably connected to the first connecting piece 41, and the other end is movably connected to the backrest 1.

[0132] The connection mode of the second connecting member 42 movably connecting the first connecting member 41 includes sliding, rotating, sliding and rotating connection, and elastic connection, and the connection mode of the second connecting member 42 movably connecting the backrest 1 can also include sliding, rotating, and elastic connection.

[0133] For example, the sliding groove 410 provided on the first connecting member 41 is in sliding connection with the sliding part 421 of the second connecting member 42, and a sliding hole 4101 can be provided on at least one side wall of the sliding groove 410, the rotating body 422 is protruded on the side wall of the sliding part 421, the sliding hole 4101 is in sliding connection with the rotating body 422, and the rotating body 422 can slide and rotate in the sliding hole 4102.

[0134] Optionally, when the backrest 1 / backrest support 2 is subjected to an external force to make the backrest support 2 rotate relative to the base 600 to the rear side of the seat, the backrest 1 can rotate with the backrest support 2 to the rear side of the seat, or when the backrest 1 / backrest support 2 is subjected to an external force to make the backrest support 2 rotate relative to the base 600 to the front side of the seat, the backrest 1 can rotate with the backrest support 2 to the front side of the seat, in this process, the first connecting member 41 and the second connecting member 42 of the second transmission member 4 are movably connected (sliding, rotating, sliding and rotating, deformation, displacement), so that the backrest 1 is movably connected with the second transmission member 4, and the first transmission member 3 is movably connected relative to the backrest 1, and the backrest 1 further moves adaptively with the sitting posture adjustment of the user, so as to better fit the user's back and / or waist, reduce the friction between the user's back and the backrest, and improve the use comfort of the seat.

[0135] As preferred, referring to Figures 8 to 11 In some embodiments, one of the second connecting member 42 and the backrest 1 is provided with a third connecting member 700, and the other is provided with a accommodating groove 800 matched with the third connecting member 700, the second connecting member 42 is movably connected with the backrest 1 through the cooperation of the third connecting member 700 and the accommodating groove 800, and the connection mode can be rotating connection, sliding connection, rotating and sliding connection, or elastic connection.

[0136] As preferred, the third connecting member 700 can be a spherical or spherical-shaped connecting member or an elastic connecting member, and the accommodating groove 800 is designed as a generally concave structure which can accommodate the third connecting member 700 and provide a relatively constrained movement track for the third connecting member 700. The third connecting member 700 is generally matched with the concave structure in shape, so as to movably connect the third connecting member 700 and the accommodating groove 800.

[0137] When the third connecting member 700 is a spherical or spherical-like connecting member, the spherical or spherical-like connecting member can rotate freely in the accommodating groove 800, providing multi-directional movement capability. When the third connecting member 700 is an elastic connecting member, for example, elastic silica gel cooperates with the accommodating groove 800 to realize rotation. It should be noted that when the elastic connecting member is used, because the elastic connecting member has a certain elasticity, the backrest 1 and / or the backrest support 2 can slide in a small range while rotating to a certain extent with the first transmission member 3, thereby realizing self-adaptive adjustment of the backrest 1, so that the backrest 1 can provide better fitting.

[0138] Referring to Figure 1 Further, the utility model provides a seat, including seat's base 600 and as the backrest assembly of preceding embodiment is recorded, the backrest support 2 of backrest assembly is connected base 600, and the connecting mode of both can be fixed connection, also can be rotary connection, wherein, the rotary connection structure between backrest support 2 and base 600 can be set as follows: backrest support 2 is arranged in base 600 through hinged axle to realize rotary connection with base 600. Further, backrest support 2 can be fixedly connected with rotating member, and the rotating member is sleeved on the hinged axle to form a rotatable connection relationship between backrest support 2 and base 600. This is only exemplary, and is not restrictive.

[0139] When the backrest 1 is subjected to an external force towards the rear side of the seat, the external force is transmitted by the first transmission member 3, so that the backrest support 2 connected with the first transmission member 3 rotates relative to the base 600, and the backrest 1 can rotate relative to the base 600 with the backrest support 2, and the backrest 1 can move relative to the backrest support 2. The external force towards the rear side of the seat applied to the backrest 1 or the backrest support 2 can be the pressure applied to the backrest 1 or the backrest support 2 by the user, or the driving force applied to the backrest 1 or the backrest support 2 by the driving element such as a motor or a cylinder arranged on the seat.

[0140] When the backrest support 2 is fixedly connected to the base 600, the backrest support 2 is relatively fixed with the base 600. When the backrest 1 is subjected to an external force, the first transmission member 3 is slidably connected with the backrest 1 or the backrest support 2, so that the backrest 1 can move relative to the backrest support 2.

[0141] The above description is only part or preferred embodiments of the utility model, neither the text nor the drawings can limit the scope of protection of the utility model, any equivalent structural transformation made by using the contents of the utility model specification and drawings, or direct / indirect application in other related technical fields is 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 backrest support arranged at one side of the backrest and used to connect a base of a seat; a first transmission member comprising a first connecting end and a second connecting end, which are respectively used to connect the backrest and the backrest support, wherein: the first connecting end is slidingly connected to the backrest support, and the second connecting end is transmissionally connected to the backrest; or, the first connecting end is connected to the backrest support, and the second connecting end is slidingly connected to the backrest; a second transmission member arranged between the first transmission member and the backrest and comprising a third connecting end and a fourth connecting end, wherein the third connecting end is transmissionally connected to the backrest, and the fourth connecting end is hingedly connected to the second connecting end; the first transmission member is slidingly connected to the backrest or the backrest support, so that the backrest can move relative to the backrest support when the backrest is subjected to an external force.

2. The backrest assembly of claim 1, wherein, The first connecting end comprises a first sliding structure, the backrest support is provided with a second sliding structure matched with the first sliding structure, and the first connecting end is slidingly connected to the backrest support through cooperation of the first sliding structure and the second sliding structure.

3. The backrest assembly of claim 2, wherein, One of the first sliding structure and the second sliding structure is sleeved on the other; and / or, The second sliding structure comprises a cavity formed in the backrest support, and the first sliding structure comprises a sliding body matched with the cavity, which can slide relative to the cavity.

4. The backrest assembly of claim 2 or 3, wherein, One of the first sliding structure and the second sliding structure is provided with a sliding groove for sliding cooperation of the two, and the first sliding structure is slidingly cooperated with the second sliding structure through the sliding groove.

5. The backrest assembly of claim 4, wherein, The backrest assembly further comprises at least one pulley arranged in one of the first sliding structure and the second sliding structure for sliding cooperation with the other one.

6. The backrest assembly of claim 1, wherein, The second connecting end is provided with a third sliding structure, the backrest is provided with a fourth sliding structure matched with the third sliding structure, and the second connecting end is slidingly connected to the backrest through cooperation of the third sliding structure and the fourth sliding structure.

7. The backrest assembly of claim 1, wherein, The second transmission member comprises: a first connecting piece, and the third connecting end is arranged at one end of the first connecting piece facing the backrest, and the first transmission member is transmissionally connected to the backrest through the first connecting piece.

8. The backrest assembly of claim 7, wherein, The second transmission member further comprises: a second connecting piece, one end of the second connecting piece is movably connected to the first connecting piece, and the other end is movably connected to the backrest.

9. The backrest assembly of claim 8, wherein, One of the second connecting piece and the backrest is provided with a third connecting piece, and the other one is provided with a receiving groove matched with the third connecting piece, and the second connecting piece is movably connected to the backrest through cooperation of the third connecting piece and the receiving groove.

10. The backrest assembly of claim 9, wherein, The third connecting piece comprises: a ball connecting piece; or an elastic connecting piece.

11. A seat, characterized by A seat comprising a base and a backrest assembly as claimed in any one of claims 1 to 10, wherein the backrest support of the backrest assembly is connected to the base.

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