Chair back for seat and seat

Abstract

The utility model discloses a chair back for a seat, which comprises a support and an elastic backrest support, the backrest support is connected with the support, the backrest support comprises an outer frame, the surface of the outer frame is provided with at least one buffer groove, the buffer groove is filled with a buffer piece, and the buffer piece is connected with the support. And the elastic modulus of the buffer piece is smaller than that of the outer frame. The chair back has good bending deformation capability and is not easy to break when being pressed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of seat, concretely relates to a backrest for seat and seat. BACKGROUND

[0002] As an indispensable part in daily life and office environment, the rationality of the design of the seat is directly related to the comfortable experience and health condition of the user. Especially the chair back part, as the structure supporting the human back, its design is very important.

[0003] The human back curve is complex and changeable, and the demand of users with different body types and sitting postures for the chair back is also different. The conventional chair back is mainly fixed type, which cannot completely adapt to the body type and sitting posture habit of different users. Although the deformable chair back appears in the prior art, the chair back is easy to break due to too large deformation when the pressure is large. SUMMARY

[0004] The utility model aims at providing a backrest for seat and seat, which has good bending deformation ability and is not easy to break under pressure.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A backrest for seat, comprising a support and an elastic backrest support, the backrest support is connected to the support, the backrest support comprises an outer frame, at least one buffer groove is formed on the surface of the outer frame, a buffer piece is filled in the buffer groove, and the elastic modulus of the buffer piece is less than that of the outer frame.

[0007] Preferably, the outer frame is formed with a first surface and a second surface opposite to the first surface along the thickness direction of the outer frame, the first surface and the second surface are both provided with the buffer groove, and the buffer groove on the first surface and the buffer groove on the second surface are one-to-one corresponding.

[0008] Preferably, the outer frame comprises a plurality of angularly connected frame strips, the inner surfaces of the plurality of frame strips are surrounded to form an annular hollow opening, a plurality of parallel cross beams are arranged in the hollow opening, and there is a gap between adjacent cross beams.

[0009] Preferably, the backrest support is fixedly connected with a backrest pad on the side away from the support, and the backrest pad is a mesh cloth with elastic mesh structure.

[0010] Preferably, a connecting piece is arranged between the backrest support and the support, and the backrest support and the support are both fixedly connected to the connecting piece.

[0011] Preferably, the connector has a mounting hole, the support has a mounting sleeve for engaging with the mounting hole, and the fastener passes through the mounting hole and the mounting sleeve to connect the connector and the support.

[0012] Preferably, the connector has an intermediate plate extending toward the backrest bracket on the side facing the backrest bracket, and the backrest bracket has a base that mates with the intermediate plate on the side facing the connector. The intermediate plate extends into the base, and a locking screw passes through the intermediate plate and the base to connect the connector and the backrest bracket.

[0013] Preferably, there are three bases, and the lines connecting the center points of the three bases form a triangle.

[0014] Preferably, the buffer is a rubber block and / or a silicone block.

[0015] In addition, to achieve the above objectives, the present invention also adopts the following technical solution:

[0016] A seat that includes the aforementioned backrest.

[0017] Compared to existing technologies, the advantages of this invention are as follows: This application features an elastic backrest support with excellent bending and deformation capabilities, allowing the chair back to deform according to varying pressure from the human body, adapting to different body shapes and sitting postures, and improving user comfort. Furthermore, the outer frame of the backrest support is equipped with a buffer groove filled with a buffer element with a low elastic modulus. This buffer element absorbs more energy during elastic deformation, reducing the deformation of the outer frame and preventing the backrest support from breaking under significant stress. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a chair back provided in an embodiment of this application;

[0019] Figure 2 for Figure 1 An explosion diagram;

[0020] Figure 3 This is an exploded view of the outer frame in an embodiment of this application;

[0021] Figure 4 This is a schematic diagram illustrating the fit between the connector and the support in an embodiment of this application;

[0022] Figure 5 This is a schematic diagram illustrating the cooperation between the connector and the backrest bracket in an embodiment of this application.

[0023] Wherein, 1, support; 11, mounting sleeve; 2, backrest support; 21, outer frame; 211, buffer groove; 212, buffer piece; 213, first surface; 214, second surface; 215, hollow opening; 216, base; 22, crossbeam; 3, backrest pad; 4, connecting piece; 41, mounting hole; 42, intermediate plate. DETAILED DESCRIPTION

[0024] The utility model will be described further, combined with the drawings and specific implementation, it is to be explained that under the premise of not conflicting, the following described each embodiment or each technical feature between can be combined randomly to form new embodiment. Except special explanation, the material and equipment that are adopted in this embodiment can be purchased from market. The example of the embodiment is shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar function throughout. The following embodiments described by reference to the drawings are exemplary, only for explaining the application, and cannot be understood as limiting the application.

[0025] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified and limited.

[0026] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "communicated", "connected" should be understood broadly, for example, it can be fixedly connected, or connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] As Figures 1 to 3 shown, the present embodiment provides a chair back for a seat, comprising a support 1 and a backrest support 2 with elasticity, the backrest support 2 is connected to the support 1, the backrest support 2 comprises an outer frame 21, at least one buffer groove 211 is provided on the surface of the outer frame 21, the buffer groove 211 is filled with a buffer piece 212, and the hardness of the buffer piece 212 is less than the hardness of the outer frame 21.

[0028] In the embodiment, the backrest comprises a support 1 and a backrest support 2 connected to the support 1, the support 1 is connected to the seat as a connecting component to assemble the backrest on the seat; and the backrest support 2 is used to provide support for the back of the user. The backrest support 2 is elastic, which will deform moderately to adapt to the human body when subjected to pressure from the back of the user, improving the comfort of the user, and also helping to disperse pressure and reduce body fatigue and pain caused by improper sitting posture for a long time. When the human body leans against the backrest support 2, the backrest support 2 can deform to provide support according to the action of the human body, and adapt to human bodies of different sizes and sitting postures. The backrest support 2 comprises an outer frame 21, a plurality of buffer grooves 211 are formed on the surface of the outer frame 21, and a buffer member 212 with a smaller elastic modulus than the outer frame 21 is filled in the buffer groove 211. The buffer member 212 with a smaller elastic modulus is weaker in resisting elastic deformation and is prone to greater deformation under external force, and the buffer member 212 can absorb more energy during elastic deformation, which may otherwise cause greater deformation of the outer frame 21. Therefore, by absorbing this energy, the buffer member 212 effectively reduces the deformation amount of the outer frame 21 and prevents the outer frame 21 from breaking when subjected to a large force. In addition, the buffer groove 211 also increases the stress release space and can provide space for the deformation of the material, avoiding excessive stress concentration and preventing the outer frame 21 from cracking. It should be noted that the outer frame 21 bears the support and fixing functions to ensure the stability and safety of the entire backrest support 2. By forming the buffer groove 211 on the outer frame 21, the impact force can be absorbed and dispersed, reducing the risk of deformation and damage of the outer frame 21, thereby enhancing the stability and durability of the entire backrest support 2.

[0029] In the prior art, a mesh cloth is often provided on the backrest to deform to adapt to the human body curve and support the human body, but the deformation range of the mesh cloth is limited, so it cannot adapt to the body size and sitting posture of different users. In the embodiment, the backrest support 2 with elasticity is provided, which has good bending deformation capability, so that the backrest can deform with different pressures from the human body to adapt to human bodies of different sizes and sitting postures, improving the comfort of the user. The outer frame 21 of the backrest support 2 is provided with a buffer groove 211, and a buffer member 212 with a smaller elastic modulus is filled in the buffer groove 211. The buffer member 212 can absorb more energy during elastic deformation to reduce the deformation amount of the outer frame 21 and prevent the backrest support 2 from breaking when subjected to a large force.

[0030] In the embodiment, the support 1 is close to L-shaped to provide better support and stability, especially in the case of needing to bear multi-directional force or complex load. The support 1 is made of elastic material, which can deform when the user leans back, providing a more comfortable support experience for the user. In other embodiments, the support 1 can also be configured to be non-deformable or rectangular, irregular, or other shapes.

[0031] In other embodiments, a lumbar pillow can also be arranged on the backrest support 2 to better protect the lumbar vertebrae of the user. The lumbar pillow can have an arc shape, an S shape, a cylindrical shape, or a square shape, etc.

[0032] As shown in Figure 3 The outer frame 21 is formed with a first surface 213 and a second surface 214 arranged opposite to the first surface 213 along the thickness direction of the outer frame 21, and the first surface 213 and the second surface 214 are both provided with a buffer groove 211, and the buffer groove 211 on the first surface 213 and the buffer groove 211 on the second surface 214 are one-to-one corresponding in position.

[0033] In the present embodiment, the first surface 213 and the second surface 214 are arranged opposite along the thickness direction of the outer frame 21, and the buffer groove 211 provided on the first surface 213 and the buffer groove 211 provided on the second surface 214 are both provided along the thickness direction of the outer frame 21, that is, the part of the outer frame 21 provided with the buffer groove 211 is thinned in thickness, and the buffer member 212 is filled in the buffer groove 211 to compensate for the reduced thickness. The first surface 213 and the second surface 214 are both provided with the buffer groove 211, and the positions of the two opposite buffer grooves 211 correspond, and the position-corresponding buffer grooves 211 can provide a buffering effect on both surfaces at the same time. That is, when subjected to an external impact, the buffer grooves 211 on the two surfaces can work cooperatively to more effectively absorb and disperse the impact force, thereby protecting the outer frame 21. Of course, in other embodiments, the buffer groove 211 can be provided only on the first surface 213 or the second surface 214.

[0034] In addition, by filling the buffer member 212 with a certain strength, the material reduced due to the provision of the buffer groove 211 can be compensated for, thereby maintaining the overall strength of the outer frame 21.

[0035] The outer frame 21 includes a plurality of frame strips that are angularly butted, and the inner surfaces of the plurality of frame strips surround to form an annular hollow 215, and a plurality of parallel cross beams 22 are arranged in the hollow 215, and the adjacent cross beams 22 have a spacing therebetween.

[0036] In the present embodiment, the outer frame 21 is composed of a plurality of frame strips that are angularly butted, and can resist external forces from different directions and form an overall frame. The inner surfaces of the frame strips surround to form an annular hollow 215 in the middle of the outer frame 21. A plurality of parallel cross beams 22 are arranged in the hollow 215, and both ends of each cross beam 22 are respectively connected to the inner surfaces of the opposite two frame strips to provide support for the overall structure.

[0037] The backrest support 2 is fixedly connected to a backrest pad 3 on the side away from the support 1, and the backrest pad 3 is a mesh cloth with an elastic mesh structure.

[0038] In this embodiment, the back cushion 3 is fixed on the side of the backrest support 2 away from the base 1, i.e. towards the user side, so that the user can be supported when leaning. The back cushion 3 is made of a mesh cloth with elastic mesh structure, which has good air permeability and elasticity, and can provide a comfortable leaning experience for the user and distribute the pressure on the back. The backrest support 2 cooperates with the back cushion 3, and the backrest support 2 provides stable support for the back cushion 3, so that the user does not feel shaking or instability when leaning. The elasticity of the mesh cloth also helps to distribute the pressure on the back and reduce discomfort when leaning for a long time.

[0039] A connecting piece 4 is arranged between the backrest support 2 and the base 1, and the backrest support 2 and the base 1 are fixed to the connecting piece 4.

[0040] In this embodiment, the connecting piece 4 is arranged between the backrest support 2 and the base 1, and is used to realize the fixed connection of the two, preventing shaking or tilting during use, thereby improving the stability of the overall structure. Adjustable fastening points can also be provided on the connecting piece 4, so that the backrest support 2 can be adjusted according to different chair back shapes, sizes and angles. The backrest support 2 can be adapted to a variety of chairs, improving the versatility and practicality of the product.

[0041] As shown in Figure 4 The connecting piece 4 is provided with a mounting hole 41, and the base 1 is provided with a mounting sleeve 11 for interfacing with the mounting hole 41, and the fastener passes through the mounting hole 41 and the mounting sleeve 11 to connect the connecting piece 4 and the base 1.

[0042] In this embodiment, the connecting piece 4 and the base 1 are connected by using the fastener to pass through the mounting hole 41 and the mounting sleeve 11, which significantly improves the connection strength between the connecting piece 4 and the base 1. This connection method can withstand a large force, ensuring the stability and safety of the overall structure. In addition, by adjusting the position and number of mounting holes 41 and mounting sleeves 11, different shapes, sizes and angles of connection requirements can be adapted. Moreover, the connection between the mounting sleeve 11 and the mounting hole 41 is a detachable connection, which is more flexible, can make the connecting piece 4 installed on different bases 1, and is convenient for checking and maintaining the chair back. Specifically, the mounting sleeve 11 can be provided with internal threads to facilitate cooperation with the fastener.

[0043] As shown in Figure 5 The side of the connecting piece 4 towards the backrest support 2 is formed with an intermediate plate 42 extending towards the backrest support 2, and the side of the backrest support 2 towards the connecting piece 4 is formed with a base 216 cooperating with the intermediate plate 42, and the intermediate plate 42 extends into the base 216, and the lock screw passes through the intermediate plate 42 and the base 216 to connect the connecting piece 4 and the backrest support 2.

[0044] In this embodiment, the connecting piece 4 is formed with an intermediate plate 42 extending towards the backrest support 2 on one side of the backrest support 2. The backrest support 2 is formed with a base 216 matched with the intermediate plate 42 on one side of the connecting piece 4. The base 216 is provided with a groove capable of accommodating the intermediate plate 42, so that the intermediate plate 42 can extend into the groove and be assembled with the base 216. The shape and size of the intermediate plate 42 and the base 216 of the backrest support 2 are matched to enable them to be closely fitted. Specifically, the base 216 is composed of two plate pieces with a spacing. A locking screw passes through the intermediate plate 42 and the base 216 to achieve the connection between the connecting piece 4 and the backrest support 2. The locking screw has a special thread design that can generate a locking force when tightened, ensuring the firm connection of the connecting piece 4 and the backrest support 2.

[0045] The backrest support 2 and the support 1 are detachably connected by the connecting piece 4, so that the backrest support 2 and the support 1 can be easily adapted to different types of chair backs. Users can choose the appropriate connection method and position according to their own needs and the shape and size of the chair, thereby achieving the best use effect.

[0046] The base 216 is configured in three, and the connecting line between the center points of the three bases 216 forms a triangle.

[0047] In this embodiment, two bases 216 are arranged at the upper end of the backrest support 2, and one base is arranged at the lower end of the backrest support 2. The connecting line between the center points of the three bases 216 forms a triangle. The stable triangular structure is conducive to keeping the backrest support 2 stable and comfortable during use, and can effectively resist the influence of external forces and torques. When the backrest support 2 is subjected to pressure, the three bases 216 can disperse the pressure to a wider area, which is conducive to reducing the pressure borne by a single base 216, thereby improving the durability of the overall structure.

[0048] The buffer 212 is a rubber block and / or a silica gel block.

[0049] In this embodiment, the buffer 212 can be a rubber block, and in other embodiments, it can also be a silica gel block, or part of it is a silica gel block and the other part is a rubber block. The silica gel block and the rubber block have good elasticity and shock absorption performance, and can absorb and disperse the vibration and impact force generated by the backrest support 2 during use.

[0050] In this embodiment, the backrest support 2 is shaped to fit the human body curve, and the backrest support 2 can be made by one-piece injection molding. Specifically, the outer frame 21 and the cross beam 22 are made of PP material, and the buffer 212 is made of rubber material. The two raw materials are one-piece injection molded to form the backrest support 2, which reduces the subsequent assembly and welding processes, thereby simplifying the production process and improving the production efficiency.

[0051] The embodiment also provides a seat, which comprises a seat cushion and a seat back, and the seat back is the seat back described above. The seat cushion is used for supporting the buttocks and legs of a user, and the seat back is used for supporting the back of the user.

[0052] Finally, it should be noted that: the above-mentioned embodiments are only optional embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-substantial changes and replacements made by those skilled in the art on the basis of the present application shall belong to the scope of protection required by the present application.

Claims

1. A seat back for a seat, characterized by The chair back comprises a support and a backrest support with elasticity, the backrest support is connected to the support, the backrest support comprises an outer frame, at least one buffer groove is formed on the surface of the outer frame, and a buffer piece is filled in the buffer groove, the elastic modulus of the buffer piece is less than the elastic modulus of the outer frame.

2. The chair back of claim 1, wherein The outer frame is formed with a first surface and a second surface arranged opposite to the first surface along the thickness direction of the outer frame, the first surface and the second surface are both provided with the buffer groove, and the buffer groove on the first surface and the buffer groove on the second surface are one-to-one corresponding.

3. The chair back of claim 1, wherein, The outer frame comprises a plurality of frame strips which are angularly connected, the inner surfaces of the plurality of frame strips are surrounded to form a ring-shaped hollow opening, a plurality of parallel cross beams are arranged in the hollow opening, and there is a space between adjacent cross beams.

4. The chair back of claim 1, wherein, A backrest pad is fixed to the side of the backrest support away from the support, and the backrest pad is a mesh cloth with elastic mesh structure.

5. A backrest according to any one of claims 1-4, characterized in that A connecting piece is arranged between the backrest support and the support, and the backrest support and the support are both fixed to the connecting piece.

6. The chair back of claim 5, wherein, The connecting piece is provided with a mounting hole, the support is provided with a mounting sleeve for being connected to the mounting hole, and a fastener passes through the mounting hole and the mounting sleeve to connect the connecting piece and the support.

7. The chair back of claim 5, wherein, The side of the connecting piece towards the backrest support is formed with an intermediate plate extending towards the backrest support, the side of the backrest support towards the connecting piece is formed with a base matched with the intermediate plate, the intermediate plate extends into the base, and a locking screw passes through the intermediate plate and the base to connect the connecting piece and the backrest support.

8. The chair back of claim 7, wherein, The base is arranged in three, and the connecting line between the center points of the three bases forms a triangle.

9. The chair back of any of claims 1-4, wherein, The buffer piece is a rubber block and / or a silica gel block.

10. A seat, characterized by The chair back comprises a support and a backrest support with elasticity, the backrest support is connected to the support, the backrest support comprises an outer frame, at least one buffer groove is formed on the surface of the outer frame, and a buffer piece is filled in the buffer groove, the elastic modulus of the buffer piece is less than the elastic modulus of the outer frame.

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