A chair back and an office chair

Abstract

The utility model discloses a chair back and office chair. The utility model discloses a chair back includes middle frame, back beam and drive part. Middle frame includes a plurality of supporting plates, and two supporting plates of adjacent rotation connection to make middle frame bendable. The supporting plate includes at least one fixed plate and a plurality of movable plates, and the fixed plate is fixedly installed to the back beam, and the back beam extends along the vertical direction. Drive part connects any movable plate, and drive part can drive the movable plate of connection to move, to make movable plate drive remaining movable plate movement to make middle frame bend. The utility model discloses a chair back, through the fixed plate of the middle frame of a plurality of supporting plates rotation connection is connected to the back beam, simultaneously sets up drive part and drives the movement of any movable plate in supporting plate to drive all movable plate movement to reach the technical effect of the bending of whole middle frame, need not set the force point on the multiple positions of middle frame to make it deformation, and the structure is more simple, and the whole structure is simple and effective.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair manufacturing technical field, concretely relates to a chair back and office chair. BACKGROUND

[0002] Office chair is a kind of equipment used in daily life, and chair back is the key to influence the comfort of chair, in order to improve the use comfort of user, the chair back is selected to be set to be flexible in prior art, to adapt to the back curve of user, obtain better use experience.But the structure for adjusting the bending of chair back in prior art is often by controlling the displacement of multiple positions of chair back to make the bending of chair back as a whole, but this structure is more complex, is not conducive to the simple trend of office chair. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art is solved.For this purpose, the utility model provides a chair back, which can bend and has simple structure.

[0004] The utility model further provides an office chair with the chair back.

[0005] According to the chair back of the first aspect embodiment of the utility model, the middle frame includes a plurality of supporting plates, and adjacent two supporting plates are rotatably connected to make the middle frame bendable.The supporting plate includes at least one fixed plate and a plurality of movable plates, the fixed plate is fixedly installed on the back beam, and the back beam extends along the vertical direction.The driving part is connected to any movable plate, and the driving part can drive the movable plate to move, so that the movable plate drives the remaining movable plates to move, so that the middle frame bends.

[0006] According to the chair back of the utility model embodiment, at least has following beneficial effect: the chair back of the utility model, the fixed plate of the middle frame rotatably connected by a plurality of supporting plates is connected to the back beam, and the driving part is connected to any movable plate in the supporting plate and drives it to move, so as to drive all movable plates to move to achieve the technical effect of the whole middle frame bending, without setting a plurality of driving mechanisms on multiple positions of the middle frame to deform, and the chair back structure is simpler.

[0007] According to some embodiments of the utility model, for adjacent two supporting plates: one of the supporting plates is provided with a first tooth head, and the other supporting plate is provided with a first tooth groove, and the first tooth head is rotatably arranged in the first tooth groove.

[0008] According to some embodiments of the utility model, the chair back further includes a connecting strip, and the connecting strip has a plurality of, adjacent connecting strips are rotatably connected along the vertical direction, and both ends of the connecting strip are respectively installed on adjacent two supporting plates.

[0009] According to some embodiments of the present application, any one of the adjacent connecting strips is provided with a second tooth head, and the other is provided with a second tooth groove, and the two connecting strips are connected through the second tooth head and the second tooth groove, and the second tooth head is rotatably arranged in the second tooth groove.

[0010] According to some embodiments of the present application, the chair back further comprises a connecting rod assembly. The connecting rod assembly comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to any one of the movable plates, the other end of the first connecting rod is rotatably connected to the second connecting rod, the driving member is connected to the second connecting rod, and the driving member can drive the second connecting rod to move, so that the first connecting rod pushes the middle frame, thereby bending the middle frame.

[0011] According to some embodiments of the present application, the supporting plates are distributed in the vertical direction, the back beam is provided with a vertically distributed guide groove, the second connecting rod is slidably arranged in the guide groove, and the guide groove is arranged above the fixed plate.

[0012] According to some embodiments of the present application, the first connecting rod is arc-shaped, and the first connecting rod is curved towards the direction of the middle frame.

[0013] According to some embodiments of the present application, the driving member is installed in the back beam, and the driving member comprises a push rod and a protective sleeve, one end of the push rod is slidably installed in the protective sleeve, and the end of the push rod away from the protective sleeve is connected to the second connecting rod. The push rod can be lifted in the vertical direction to make the second connecting rod slide in the guide groove.

[0014] According to some embodiments of the present application, when the second connecting rod is located at the lowermost part of the guide groove, the side surface of the middle frame towards the back beam is vertical.

[0015] According to the office chair of the second aspect of the present application, the chair back comprises the chair back of any one of the first aspect of the present application.

[0016] According to the office chair of the present application, the chair back of the first aspect of the present application has the following beneficial effects: the fixed plate of the middle frame composed of a plurality of supporting plates rotatably connected is connected to the back beam, and the driving member is arranged to connect any movable plate in the supporting plate and drive it to move, thereby driving all movable plates to move to achieve the technical effect of bending the entire middle frame. Without setting the force point at multiple positions of the middle frame to deform, the structure is simpler, and the overall structure of the office chair using the chair back is more simple and effective.

[0017] The additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0019] Figure 1 is a first perspective view of a chair back in an embodiment of the present application;

[0020] Figure 2 is Figure 1 is an enlarged view of the A area in the middle;

[0021] Figure 3 is a second perspective view of a chair back in an embodiment of the present application;

[0022] Figure 4 is a side view of a chair back in an embodiment of the present application;

[0023] Figure 5 is a schematic view of a bending process of a chair back in an embodiment of the present application.

[0024] Reference signs: chair back 100, middle frame 101, supporting plate 102, fixed plate 103, movable plate 104, back beam 105, reinforcing rib 106, mounting groove 107, first tooth head 201, first tooth groove 202, connecting strip 203, second tooth head 204, second tooth groove 205, first connecting rod 301, second connecting rod 302, guide groove 303, driving member 304, push rod 305, protective sleeve 306. DETAILED DESCRIPTION

[0025] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0026] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0027] In the description of the utility model, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described as first, second, it is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0028] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection, etc. should be understood broadly, and the person skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0029] In the description of the utility model, the description of reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] Reference Figures 1 to 3 According to the chair back 100 of the first aspect embodiment of the utility model, the middle frame 101 includes a plurality of supporting plates 102, and adjacent two supporting plates 102 are rotationally connected to make the middle frame 101 bendable. The supporting plate 102 includes at least one fixed plate 103 and a plurality of movable plates 104, the fixed plate 103 is fixedly installed on the back beam 105, and the back beam 105 extends along the vertical direction. The driving member 304 is connected to any movable plate 104, and the driving member 304 can drive the connected movable plate 104 to move, so that the movable plate 104 drives the remaining movable plates 104 to move, so that the middle frame 101 bends. The chair back 100 of the utility model, by connecting the fixed plate 103 of the middle frame 101 composed of a plurality of supporting plates 102 rotationally connected to the back beam 105, while setting the driving member 304 connected to any movable plate 104 in the supporting plate 102 and driving it to move, thereby driving all movable plates 104 to move to achieve the technical effect of bending the entire middle frame 101, without setting the force point on multiple positions of the middle frame 101 to deform, the structure is more simple, the overall structure is simple and effective.

[0031] Reference Figure 1 And Figure 2In some embodiments of the utility model, for two adjacent supporting plates 102: one of the supporting plates 102 is provided with a first tooth head 201, the other supporting plate 102 is provided with a first tooth groove 202, and the first tooth head 201 is rotatably arranged in the first tooth groove 202. The rotation connection principle of the tooth head and the tooth groove comes from gear meshing, and the tooth profile curves contact each other and transmit motion, allowing the first tooth head 201 to be angularly adjusted within a certain range, increasing the flexibility of the connection, and more easily realizing the quick assembly and disassembly between the supporting plate 102 and the supporting plate 102. Further, referring to Figure 2 In some embodiments of the utility model, the curve of the second tooth groove 205 towards the opening is an involute, which can provide a larger rotation angle for the second tooth head 204, and the first tooth groove 202 can be designed in the same way to make the first tooth head 201 have a larger rotation angle.

[0032] It should be noted that, in some embodiments of the utility model, in addition to the meshing connection of the tooth head and the tooth groove, the two adjacent supporting plates 102 can also be connected by various rotating connection methods such as rotating bearings and hinges, as long as the supporting plates 102 can rotate.

[0033] Referring to Figure 1 and Figure 2 In some embodiments of the utility model, the chair back 100 further comprises a connecting strip 203. The connecting strip 203 has a plurality of, and the adjacent connecting strips 203 are rotatably connected in the vertical direction, and the two ends of the connecting strip 203 are respectively installed on the two adjacent supporting plates 102. The connecting strip 203 can further consolidate the two adjacent supporting plates 102 to prevent them from falling off, and the rotation connection between the two adjacent connecting strips 203 can allow the connecting strip 203 to consolidate the connection of the supporting plate 102 without affecting the rotation of the supporting plate 102. It should be noted that the two adjacent supporting plates 102 can be between the two adjacent movable plates 104, or between the adjacent fixed plate 103 and movable plate 104.

[0034] Referring to Figure 2In some embodiments of this utility model, one of the adjacent connecting strips 203 is provided with a second tooth 204, and the other is provided with a second tooth groove 205. The two connecting strips 203 are connected by the second tooth 204 and the second tooth groove 205, and the second tooth 204 is rotatably disposed in the second tooth groove 205. By using a gear-like meshing method, the two parts contact and transmit motion through their tooth profile curves, allowing the second tooth 204 to be adjusted in angle within a certain range. This increases the flexibility of the connection and makes it easier to quickly assemble and disassemble the connecting strips 203. Preferably, the first tooth 201 and the second tooth 204 are set to the same size, and the first tooth groove 202 and the second tooth groove 205 are set to the same size. This facilitates the processing of the support plate 102 and the connecting strips 203 on the same processing line, improving the manufacturing efficiency of the chair back 100 and reducing manufacturing costs. It should be noted that in some embodiments of this utility model, in addition to being connected by toothed head and toothed groove, two adjacent connecting strips 203 can also be connected by various rotational connection methods such as rotating bearings and hinges, as long as the connecting strips 203 can rotate.

[0035] It should be noted that, Figure 2 This is a partial exploded view. The separated connecting strip 203 is actually installed between the two connecting strips 203. The partial exploded view is to better show the connection structure between the pallets 102 through the first tooth head 201 and the first tooth groove 202.

[0036] refer to Figure 3 and Figure 4 In some embodiments of this utility model, the backrest 100 further includes a linkage assembly. The linkage assembly includes a first linkage 301 and a second linkage 302. One end of the first linkage 301 is rotatably connected to any movable plate 104, and the other end of the first linkage 301 is rotatably connected to the second linkage 302. A driving member 304 is connected to the second linkage 302 and can drive the second linkage 302 to move, causing the first linkage 301 to push the middle frame 101, thereby bending the middle frame 101. The transmission method of the linkage assembly is smoother, and the movement of the linkage itself and the bending of the middle frame 101 are more continuous, improving the user's perception experience. Furthermore, the design structure of the linkage assembly is more flexible, enabling multi-angle transmission. For example, in this embodiment of the utility model, the first linkage 301 is arranged along a planar direction, and the second linkage 302 is arranged along a vertical direction. With the fixing member fixed to the back beam 105, the upward movement of the second linkage 302 will push the first linkage 301 to drive the movable plate 104 to move, thereby achieving… Figure 5 The bending effect shown is illustrated. In addition, the linkage assembly also boasts advantages such as compact structure, high transmission efficiency, strong adaptability, high load-bearing capacity, and ease of processing, enabling it to better adapt to different chair back structures and bending requirements.

[0037] Reference Figure 3 In some embodiments of the present application, the supporting plates 102 are distributed along the vertical direction, the back beam 105 is provided with vertically distributed guide grooves 303, the second connecting rods 302 are slidably arranged in the guide grooves 303, and the guide grooves 303 are arranged above the fixed plates 103. The supporting plates 102 are distributed along the vertical direction and are rotationally connected, so that the middle frame 101 as a whole can be bent as shown, thereby better fitting the curvature of the user's spine and improving the use experience. The second connecting rods 302 are arranged in the vertically distributed guide grooves 303, so that the vertical movement can be more accurately performed, so that the driving force can be transmitted to the first connecting rod 301 to make the first connecting rod 301 rotate, thereby making the movable plates 104 connected by the first connecting rod 301 move, and the entire middle frame 101 bend. It should be noted that, in some embodiments of the present application, the supporting plates 102 are distributed along the vertical direction, the back beam 105 is provided with vertically distributed guide grooves 303, the second connecting rods 302 are slidably arranged in the guide grooves 303, and the guide grooves 303 are arranged above the fixed plates 103. The supporting plates 102 are distributed along the vertical direction and are rotationally connected, so that the middle frame 101 as a whole can be bent as shown, thereby better fitting the curvature of the user's spine and improving the use experience. The second connecting rods 302 are arranged in the vertically distributed guide grooves 303, so that the vertical movement can be more accurately performed, so that the driving force can be transmitted to the first connecting rod 301 to make the first connecting rod 301 rotate, thereby making the movable plates 104 connected by the first connecting rod 301 move, and the entire middle frame 101 bend. Figures 3 to 5 Figure 3 In some embodiments of the present application, when the supporting plates 102 are distributed along the vertical direction, the fixed plates 103 are arranged at the bottom end, the movable plates 104 are all arranged above the fixed plates 103, and the first connecting rod 301 is connected to the movable plate 104 closer to the top end of the middle frame 101. In this way, the rotational connection between the supporting plates 102 can be maximized, so that the middle frame 101 has a maximum bendable range, thereby improving the application scenarios of the chair back 100. It should be noted that, in some embodiments of the present application, the bendable range of the chair back 100 is associated with the connection position of the first connecting rod 301, the length of the first connecting rod 301 and the stroke of the second connecting rod 302. Specifically, the above parameters can be adjusted according to product requirements, and appropriately increasing the length of the first connecting rod 301, the stroke of the second connecting rod 302 and arranging the first connecting rod 301 away from the fixed plate 103 can effectively improve the maximum bending degree.

[0038] It should be noted that, in some embodiments of the present application, the supporting plates 102 can also be distributed along the horizontal direction. The middle frame 101 designed in this way can also realize the bending function. At this time, the distance between the two ends of the middle frame 101 in the horizontal position is adjusted, that is, the optimal waist circumference of the chair back 100 is adjusted, so as to adapt to the use experience of people with different waist circumferences and improve the application scenarios of the chair back 100.

[0039] Reference Figures 3 to 5 In some embodiments of the present application, the first connecting rod 301 is in the shape of an arc, and the first connecting rod 301 is curved towards the direction of the middle frame 101. In this way, when the second connecting rod 302 moves upwards and pushes the first connecting rod 301, the first connecting rod 301 can more easily push towards the side where the middle frame 101 is located, thereby pushing the middle frame 101 to bend, and the bending process is more simple. Further, reference Figure 5 ​In some embodiments of the utility model, first connecting rod 301 is set to: along vertical direction, when the bottom end of first connecting rod 301 is located at the bottom end of guide slot 303, the top end of first connecting rod 301 is offset to the direction where middle frame 101 is located, so that first connecting rod 301 always has the trend of rotating to middle frame 101, and when being pushed by second connecting rod 302, middle frame 101 can be bent more easily.

[0040] It should be noted that, with reference to Figure 3 In some embodiments of the utility model, guide slot 303 is symmetrically set on both sides of back beam 105 along horizontal direction, so that two first connecting rods 301 in synchronous motion can be set, and the two ends of second connecting rod 302 are respectively arranged in two guide slots 303, the two ends of second connecting rod 302 are connected with two first connecting rods 301, and driving part 304 is connected with the middle part of second connecting rod 302, so that only second connecting rod 302 needs to be pushed to make first connecting rods 301 on both sides move synchronously, which can better push movable plate 104 to bend middle frame 101, and the two first connecting rods 301 distributed at intervals can also make the stress of movable plate 104 more uniform, preventing swinging during pushing.

[0041] With reference to Figure 3 In some embodiments of the utility model, driving part 304 is installed in back beam 105, driving part 304 includes push rod 305 and protective sleeve 306, one end of push rod 305 is slidably installed in protective sleeve 306, the end of push rod 305 away from protective sleeve 306 is connected with second connecting rod 302, and push rod 305 can be lifted along vertical direction to make second connecting rod 302 slide in guide slot 303. Driving part 304 installed in back beam 105 can improve space utilization, reduce the overall size of chair back 100 and improve the aesthetic degree, push rod 305 is rotationally connected with second connecting rod 302 and is used for pushing, which can well play the technical effect of bending middle frame 101, and protective sleeve 306 can protect the outer periphery of push rod 305 from being abraded and damaged, improving the service life. It should be noted that, in some embodiments of the utility model, driving part 304 is driven by a motor, the motor is electrically connected with push rod 305 and drives push rod 305 to lift along vertical direction, in some embodiments, driving part 304 can also be driven by a pneumatic cylinder, push rod 305 is a piston rod in the pneumatic cylinder assembly, and protective sleeve 306 is a cylinder body of the pneumatic cylinder assembly, and the piston rod is lifted by connecting the air source, so that the design can also play the technical effect of pushing the connecting rod assembly to move to bend middle frame 101.

[0042] With reference to Figure 4 And Figure 5In some embodiments of the utility model, when the second connecting rod 302 is located at the lowermost of the guide groove 303, the side surface of the middle frame 101 towards the back beam 105 is vertical. This design can make the middle frame 101 have the largest range of motion, and the surface of the back beam 105 close to the middle frame 101 limits the middle frame 101 in the middle of the motion range of the connecting rod assembly, the bottom end of the guide groove 303 limits the second connecting rod 302, both of which make the middle frame 101 not bend in the opposite direction, so that it is located Figure 5 When the user is in the state of the rightmost figure shown in the figure, the user can have a better use experience.

[0043] It should be noted that, with reference to Figure 1 In some embodiments of the utility model, when the supporting plate 102 is distributed along the vertical direction, the supporting plate 102 at the top end and the bottom end is arranged with a reinforcing rib 106, and a plurality of reinforcing ribs 106 are distributed along the vertical direction, and the two ends of the reinforcing rib 106 are connected to the two ends of the supporting plate 102 in the horizontal direction. Because in the actual use process, the bottom end and the top end of the middle frame 101 are often the positions of force, arranging the reinforcing rib 106 in the supporting plate 102 at the two positions can effectively improve the overall structural strength of the middle frame 101.

[0044] It should be noted that, with reference to Figure 1 In some embodiments of the utility model, the outer periphery of the middle frame 101 is provided with a mounting groove 107, which can be used for mounting the mesh cloth, so that the side surface of the middle frame 101 away from the back beam 105 is wrapped by the mesh cloth, thereby providing a comfortable and light leaning surface for the user and improving the use experience.

[0045] According to the office chair of the second aspect of the utility model, the chair back 100 of any one of the first aspect of the utility model is connected. The chair back 100 of the first aspect of the utility model is connected to the back beam 105 by the fixed plate 103 of the middle frame 101 composed of a plurality of supporting plates 102, and the driving member 304 is connected to any movable plate 104 in the supporting plate 102 and drives the movable plate 104 to move, thereby driving all movable plates 104 to move and achieving the technical effect of bending the entire middle frame 101. Without setting the force point at multiple positions of the middle frame 101 to deform, the structure is simpler, and the overall structure of the office chair using the chair back 100 is more simple and effective.

[0046] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A chair back, characterised in that The chair back comprises: a middle frame comprising a plurality of supporting plates, two adjacent supporting plates being rotatably connected so that the middle frame is bendable, the plurality of supporting plates comprising at least one fixed plate and a plurality of movable plates; a back beam, the fixed plate being fixedly installed on the back beam; a driving member connected to one of the movable plates, the driving member being capable of driving the movable plate connected thereto to move so as to bend the middle frame.

2. The chair back of claim 1, wherein For two adjacent supporting plates: one of the supporting plates is provided with a first tooth head, and the other of the supporting plates is provided with a first tooth groove, the first tooth head being rotatably arranged in the first tooth groove.

3. The chair back of claim 2, wherein, The chair back further comprises: a plurality of connecting strips arranged in a vertical direction, two adjacent connecting strips being rotatably connected, two ends of each connecting strip being respectively installed on two adjacent supporting plates.

4. The chair back of claim 3, wherein, One of the two adjacent connecting strips is provided with a second tooth head, and the other of the two adjacent connecting strips is provided with a second tooth groove, the two connecting strips being connected through the second tooth head and the second tooth groove, the second tooth head being rotatably arranged in the second tooth groove.

5. The chair back of claim 1, wherein, The chair back further comprises: a linkage assembly comprising a first linkage and a second linkage, one end of the first linkage being rotatably connected to one of the movable plates, the other end of the first linkage being rotatably connected to the second linkage, the driving member being connected to the second linkage, the driving member being capable of driving the second linkage to move so that the first linkage pushes the middle frame to bend the middle frame.

6. The chair back of claim 5, wherein, The supporting plates are arranged in a vertical direction, the back beam is provided with vertically arranged guide grooves, the second linkage is slidably arranged in the guide grooves, and the guide grooves are arranged above the fixed plate.

7. The chair back of claim 6, wherein The first linkage is in a circular arc shape, and the first linkage is curved towards the direction of the middle frame.

8. The chair back of claim 6, wherein, The driving member is installed in the back beam, the driving member comprises a push rod and a protective sleeve, one end of the push rod is slidably installed in the protective sleeve, the other end of the push rod away from the protective sleeve is connected to the second linkage, and the push rod can be lifted in a vertical direction to make the second linkage slide in the guide grooves.

9. The chair back of claim 6, wherein, When the second linkage is located at the lowermost position of the guide grooves, the side surface of the middle frame towards the back beam is vertical.

10. Office chair, characterized in that The chair back comprises the chair back as claimed in any one of claims 1-9.

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