Adjustable chair

Abstract

A chair back component of the adjustable chair comprises a first support, a first supporting plate and a second supporting plate, the lower portion of the first support is connected with a chair seat component through a chair back rotating component, and the side, away from a first abutting face, of the first supporting plate is connected with the first support through a connecting piece. A second supporting plate is arranged between the first supporting plate and the first support and can move up and down relative to the first supporting plate, the second supporting plate comprises a connecting part arranged in the moving space and an abutting part located outside the moving space, and the abutting part is provided with a second abutting face; meanwhile, a locking structure is installed on the first support to adjust movement of the second supporting plate in the moving space so as to change the size of the second abutting face. When a user has a rest by adjusting the chair back to be inclined, the head of the user can rest on each position of the second supporting plate in an enough moving space, so that the user can conveniently change various sleeping postures when lying on the chair to have a rest.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to an adjustable chair. Background Art

[0002] As people's living standards improve, their requirements for daily necessities are getting higher and higher. Chairs are essential furniture in people's daily life and office. Traditional classroom chairs generally include: a base, a seat and a backrest. The functions of this type of classroom chair are relatively simple. In addition to ensuring basic comfortable support, it generally does not have more functions. Existing chairs for work and chairs for study are divided into pillow-back integrated type and pillow-back separated type. The pillow-back integrated backrest is basically fixed and cannot be moved. The height of the headrest on the chair back cannot be adjusted, which makes users of different heights feel very inconvenient when using it. For the pillow-back separated type, the headrest and the backrest are often connected by a length-adjustable connecting beam, and there is a wide empty spacing area between the headrest and the backrest. When the user tilts the chair backrest to rest, he can only maintain a specific posture to make his head lean on the headrest. A slight change in lying posture will easily cause the head to slide down the spacing area between the headrest and the backrest, hitting the lower edge of the headrest or the top edge of the backrest, which is very uncomfortable and seriously affects rest. Summary of the invention

[0003] The utility model aims at the deficiencies in the prior art and provides an adjustable chair, comprising a seat component, a backrest component and a leg component, wherein the seat component is connected to the backrest component through a backrest rotating component, and the lower part of the seat component is connected to the leg component, and is characterized in that:

[0004] The chair back component includes a first bracket, a first support plate and a second support plate, the lower portion of the first bracket is connected to the chair seat component through a chair back rotating component, the first support plate has a first abutting surface for supporting the back of a human body, the first support plate is connected to the first bracket via a connecting member on a side away from the first abutting surface, and a moving space is provided between the first support plate and the first bracket;

[0005] The second support plate is arranged between the first support plate and the first bracket and can move up and down relative to the first support plate, the second support plate includes a connecting portion arranged in the moving space and a supporting portion located outside the moving space, the supporting portion has a second supporting surface, and the first supporting surface and the second supporting surface are connected through the upper edge of the first support plate;

[0006] A locking structure is also installed on the first bracket. The locking structure includes an operating member and a locking member. The locking member can limit the movement of the second support plate in the moving space under the action of the operating member to change the size of the second abutting surface.

[0007] Preferably, the chair back component can be rotated relative to the chair seat component via a chair back rotating component and switch between a first posture and a second posture, and in the second posture, the angle between the chair back component and the chair seat component is greater than the angle between the chair back component and the chair seat component in the first posture; in the second posture, the first abutment surface and the second abutment surface are connected to form a bearing surface for supporting the upper body of the human body.

[0008] Preferably, the second supporting plate is an integral structure.

[0009] Preferably, the connecting member includes a plurality of connecting columns installed on the side of the first support plate away from the first abutment surface, and a plurality of movable grooves are correspondingly arranged on the second support plate. The connecting columns can move up and down in the corresponding movable grooves, and each connecting column passes through the corresponding movable groove and is fixedly connected to the first bracket.

[0010] Preferably, the operating member is rotatably connected to the first bracket, one end of the locking member is connected to the first frame, and the other end is provided with an extrusion portion toward the second support plate side, and the operating member can press the locking member in a locked state to drive the extrusion portion to fit against the side of the second support plate to limit the relative movement of the second support plate.

[0011] Preferably, a receiving groove for accommodating the operating member is provided on a side of the first frame away from the second support plate, the operating member is rotatably connected to a side wall of the receiving groove via a rotating shaft, and a protruding extrusion block is provided on a side of the operating member close to the receiving groove;

[0012] A through hole is provided at the bottom of the storage groove, the locking piece is installed in the through hole, one end of the locking piece is connected to the wall of the through hole, the operating piece rotates into the storage groove when in the locked state, and the extrusion block pushes the locking piece to leave the through hole and fit with the side of the second support plate to limit the relative movement of the second support plate; the operating piece rotates out of the storage groove when in the unlocked state, and the locking piece is located in the through hole.

[0013] Preferably, the seat back rotating member comprises two seat back rotating components respectively connected to the seat structure bracket and the seat back structure bracket on both sides;

[0014] The chair back rotating assembly includes a shell connected to the bracket on the same side of the seat component, a rotating member connected to the bracket on the same side of the chair back component, and a limiting structure for limiting the position of the rotating member in the shell, the limiting structure includes a control limiting member and a reset member movably connected to the shell, and the rotating member can rotate in the shell; the control limiting member can limit at least one position of the rotating member in the shell in a locked state, and the rotating member can rotate in the shell when the control limiting member is in an unlocked state under external force.

[0015] Preferably, a first protrusion is provided at the end of the rotating member, a second protrusion is provided inwardly near the seat component in the shell, the control limiter is rotatably connected to the shell through a rotating shaft, the control limiter comprises a limiter and an operating part connected to one end of the limiter, and a locking part is provided at one end of the limiter away from the operating part;

[0016] When the control limiter is in the locked state, the locking portion abuts against the first protrusion to limit the rotation of the rotating member relative to the shell in the direction away from the seat component; when the control limiter is in the unlocked state, the first protrusion is separated from the locking portion and can be rotated to abut against the second protrusion, at which time the seat back component takes the second posture.

[0017] Preferably, the seat back rotating component further comprises a synchronization rod, and two ends of the synchronization rod are respectively connected to the operating parts of the seat back rotating components on both sides.

[0018] Preferably, the seat component includes a seat bracket and a foot support component installed at the lower part of the seat bracket, the foot support component includes two mounting seats fixed on both sides of the seat bracket, a connecting rod that can move along the corresponding mounting seats, and a foot support plate, the foot support plate is connected to the ends of the two connecting rods and can be flipped relative to the connecting rods.

[0019] The utility model discloses an adjustable chair, wherein the backrest component of the chair comprises three parts: a first bracket, a first support plate and a second support plate. The lower part of the first bracket is connected to the seat component through a backrest rotating component, and the first support plate is connected to the first bracket through a connecting member on the side away from the first abutting surface. The second support plate is arranged between the first support plate and the first bracket and can move up and down relative to the first support plate. The second support plate comprises a connecting part arranged in the moving space and an abutting part located outside the moving space, and a second abutting surface is provided on the abutting part. At the same time, a locking structure is installed on the first bracket to adjust the movement of the second support plate in the moving space so as to change the size of the second abutting surface. When in use, the first abutting surface on the first support plate is used to support the back of the user, and the second abutting surface is used to support the neck or part of the head of the user. At the same time, since the first abutting surface and the second abutting surface are always connected as a whole support surface without a separated interval area in the middle, when the user tilts the backrest to rest, the head has a large enough space for movement, that is, it can be supported on various positions of the second support plate, so that the user can change various sleeping positions when lying on the chair to rest.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0022] Figure 1 The figure is a schematic diagram of the structure of an adjustable chair disclosed in an embodiment of the utility model.

[0023] Figure 2 This is an exploded view of the chair back component disclosed in the embodiment of the utility model.

[0024] Figure 3 It is a schematic back view of the first bracket disclosed in the embodiment of the utility model.

[0025] Figure 4 It is a schematic structural diagram of a chair back rotating component disclosed in an embodiment of the utility model.

[0026] Figure 5 This is a schematic structural diagram of a chair seat component disclosed in an embodiment of the utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figure 1-2 As shown, as an embodiment of the utility model, an adjustable chair is disclosed, comprising a seat component 1, a backrest component 2 and a leg component 3. The seat component 1 is mainly used for supporting the user when sitting on the chair, the backrest component 2 is used for supporting the user when leaning back or lying flat, and the leg component 3 is used to support the entire chair. The seat component 1 is connected to the backrest component 2 through a backrest rotating component 4, and the backrest component 2 and the seat component 1 can form different angles, so that the chair forms a first posture and a second posture. The user is in a sitting state in the first posture, and the user is in a lying state in the second posture. The lower part of the seat component 1 is connected to the leg component 3. The backrest component 2 includes a first bracket 21, a first support plate 22 and a second support plate 23. The lower part of the first bracket 21 is connected to the seat component 1 through the backrest rotating component 4. The first support plate 22 has a first abutting surface 221 for supporting the back of the human body, and the first support plate 22 is connected to the first bracket 21 through a connecting member 222 on the side away from the first abutting surface 221. In this embodiment, the connecting member is set as a screw connection, and the connecting member and the first bracket 21 can also be set as other connection methods such as welding and gluing. The screw connection in this embodiment is convenient for disassembly and assembly. A moving space is set between the first support plate 22 and the first bracket 21.

[0031] The second support plate 23 is arranged between the first support plate 22 and the first bracket 21 and can move up and down relative to the first support plate 22. The second support plate 23 moves up and down and can be used by users of different heights. The second support plate 23 includes a connecting portion arranged in the moving space and a supporting portion located outside the moving space. The supporting portion has a second supporting surface 231. The first supporting surface 221 and the second supporting surface 231 are connected through the upper edge of the first support plate. When in use, the first supporting surface on the first support plate is used to support the back of the user, and the second supporting surface is used to support the neck or part of the head of the user. At the same time, since the first supporting surface and the second supporting surface are always connected as a whole supporting surface without a separated interval area in the middle, when the user tilts the chair back to rest, the head has a large enough space to rest on the second support plate, so that the user can change various sleeping positions when lying on the chair to rest.

[0032] like Figure 3 As shown, a locking structure is also installed on the first bracket 21, and the locking structure includes an operating member 211 and a locking member 212. The locking member 212 can limit the movement of the second support plate 23 in the moving space under the action of the operating member 211 to change the size of the second abutment surface 231 so that users of different heights can use the chair.

[0033] In a specific embodiment, the backrest component 2 can be rotated relative to the seat component 1 through the backrest rotating component 4, and switched between a first posture and a second posture, and the angle between the backrest component 2 and the seat component in the second posture is greater than the angle between the backrest component 2 and the seat component 1 in the first posture. In the first posture, the human body is in a sitting state, and in the second posture, the human body is in a lying state, and can rest comfortably; in the second posture, the first abutting surface 211 and the second abutting surface 231 are connected to form a bearing surface for bearing the upper body of the human body, and there is no obvious gap on the bearing surface, which can achieve the effect of protecting the human cervical spine.

[0034] In a specific embodiment, the second support plate 23 is an integrated structure, which is convenient for disassembly and adjustment of the overall height of the second support plate 23. The integrated structure also ensures that the neck of a person can rest comfortably on the second resting surface 231 when using the chair.

[0035] In a specific embodiment, the connecting member 222 includes a plurality of connecting columns installed on the side of the first support plate 22 away from the first abutting surface 221, and a plurality of movable grooves 231 are correspondingly provided on the second support plate 23. The movable grooves 231 correspond to the connecting columns 222 one by one, and the connecting columns can move up and down in the corresponding movable grooves 231. Each connecting column 222 passes through the corresponding movable grooves 231 and can be fixedly connected to the first bracket 21 by screws. Of course, in other embodiments, the connecting column 222 and the first bracket 21 can also be set to other connection methods such as welding and gluing. The screw connection in this embodiment is convenient for disassembly and assembly.

[0036] In a specific embodiment, the operating member 211 is rotatably connected to the first bracket 21, one end of the locking member 212 is connected to the first frame 21, and the other end is provided with a pressing portion 2121 on the side of the second support plate 23, and the structural cross-section of the pressing portion 2121 away from the first abutting surface 221 is trapezoidal, so that the pressing portion 2121 is wide at the top and narrow at the bottom, which is convenient for the operating member 211 and the locking member 212 to cooperate and switch the working state. In the locked state, the operating member 211 can press the locking member 212 to drive the pressing portion 2121 to fit the side of the second support plate 23 to limit the relative movement of the second support plate 23 in the moving space.

[0037] In a specific embodiment, a receiving groove 213 for accommodating the operating member 211 is provided on a side of the first frame 21 away from the second support plate 23. The operating member 211 is rotatably connected to the side wall of the receiving groove via a rotating shaft 2131, and the rotating shaft 2131 is located on a side close to the top end surface of the first frame 21. A protruding extrusion block 2111 is provided on a side of the operating member 211 close to the receiving groove 213.

[0038] A through hole is provided at the bottom of the storage slot 213, and the locking member 212 is installed in the through hole, and one end of the locking member 212 is connected to the wall of the through hole. When the operating member 211 is in the locked state, it rotates into the storage slot 213 and the extrusion block 2111 pushes the locking member 212 to leave the through hole and fit with the side of the second support plate 23 to limit the relative movement of the second support plate 23; when the operating member 211 is in the unlocked state, it rotates out of the storage slot 213 and the locking member 212 is located in the through hole. When the second support plate 23 is in the unlocked state, it is pulled up and down to move it in the moving space, and then the size of the bearing surface formed by the first abutting surface 211 and the second abutting surface 231 can be adjusted, which provides convenience for users of different heights to use the chair.

[0039] In a specific embodiment, the seat back rotating component 4 includes two seat back rotating components respectively connected to the seat component bracket and the seat back component bracket on both sides.

[0040] In a specific embodiment, Figure 4 As shown, the chair back rotating assembly includes a shell 41 connected to the bracket on the same side of the seat component 1, a rotating member 42 connected to the bracket on the same side of the chair back component 2, and a limiting structure 43 for limiting the position of the rotating member in the shell. The limiting structure 43 includes an operating limiting member 431 and a reset member 432 movably connected to the shell. In this embodiment, the reset member 432 is a spring. When the chair is in the first posture, the spring is in a compressed state. When the operating limiting member 431 is pulled upward, the spring is further compressed. After the rotating member 42 rotates, the operating limiting member is reset, and the spring is released from the compressed state and becomes a normal state. At this time, the chair is in the second posture. The rotating member 42 can rotate in the shell 41; the operating limiting member 431 can limit at least one position of the rotating member 42 in the shell 41 in the locked state. In the locked state, the chair is in the first posture, and the human body is in a sitting state. The chair can be used normally for office work or study. When the control limiter 431 is unlocked by an external force, the rotating member 42 can rotate in the shell 41. After the rotating member 42 rotates, the chair switches to the second posture, and the human body lies flat and can rest comfortably.

[0041] In a specific embodiment, a first protrusion 421 is provided at the end of the rotating member 42, a second protrusion 411 is provided inwardly near the seat component 1 in the shell 41, and the control limiter 431 is rotatably connected to the shell 41 through a rotating shaft. The control limiter 431 includes a limiter 4311 and an operating portion 4312 connected to one end of the limiter 4311, and a locking portion 4313 is provided at one end of the limiter 4311 away from the operating portion 4312;

[0042] When the control limit member 431 is in the locked state, the locking portion 4313 abuts against the first protrusion 421 to limit the rotation of the rotating member 42 relative to the shell 41 in the direction away from the seat component. The locked state is the first posture of the chair, and the user uses the chair while sitting; when the control limit member 431 is in the unlocked state, the first protrusion 421 is separated from the locking portion and can be rotated to abut against the second protrusion 411. At this time, the chair back component is in the second posture, and the user can lie down and rest.

[0043] In a specific embodiment, the backrest rotating component further includes a synchronization rod 44, and both ends of the synchronization rod 44 are respectively connected to the operating parts 4312 of the backrest rotating components on both sides. When the operating part 4312 is pulled up, the backrest rotating components on both sides are unlocked at the same time, and the chair is in the second posture; when the operating part 4312 is released, the backrest component 2 is adjusted, and the backrest rotating components on both sides are in a locked state at the same time, and the chair is in the first posture.

[0044] In a specific embodiment, Figure 5 As shown, the seat component 1 includes a seat frame 11 and a foot support component 12 installed at the lower part of the seat frame. The foot support component 12 includes two mounting seats 121 fixed on both sides of the seat frame, a connecting rod 122 that can move along the corresponding mounting seats, and a foot support plate 123. The foot support plate 123 is connected to the ends of the two connecting rods 122 and can be flipped relative to the connecting rods 122. After flipping, the connecting rods 122 are pulled in the direction of the foot support plate 123 to put the foot support plate 123 in a working state, and the user can lean his legs against the upper surface of the foot support plate 123. The curve of the foot support plate 123 conforms to the curve of the human body. When the foot support component 12 is not in use, the foot support plate 123 can be flipped in the opposite direction, the connecting rod 122 can be moved away from the foot support plate 123, and the foot support component 12 can be retracted.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the utility model.

[0046] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. An adjustable chair, comprising a seat component, a back component and a leg component, wherein the seat component is connected to the back component via a back rotating component, and the lower part of the seat component is connected to the leg component, characterized in that: The chair back component includes a first bracket, a first support plate and a second support plate, the lower portion of the first bracket is connected to the chair seat component through a chair back rotating component, the first support plate has a first abutting surface for supporting the back of a human body, the first support plate is connected to the first bracket via a connecting member on a side away from the first abutting surface, and a moving space is provided between the first support plate and the first bracket; The second support plate is arranged between the first support plate and the first bracket and can move up and down relative to the first support plate, the second support plate includes a connecting portion arranged in the moving space and a supporting portion located outside the moving space, the supporting portion has a second supporting surface, and the first supporting surface and the second supporting surface are connected through the upper edge of the first support plate; A locking structure is also installed on the first bracket. The locking structure includes an operating member and a locking member. The locking member can limit the movement of the second support plate in the moving space under the action of the operating member to change the size of the second abutting surface.

2. The adjustable chair according to claim 1, characterized in that: The chair back component can be rotated relative to the chair seat component via a chair back rotating component and can switch between a first posture and a second posture. In the second posture, the angle between the chair back component and the chair seat component is greater than the angle between the chair back component and the chair seat component in the first posture. In the second posture, the first abutment surface and the second abutment surface are connected to form a bearing surface for supporting the upper body of a human body.

3. The adjustable chair according to claim 2, characterized in that: The second supporting plate is an integrated structure.

4. The adjustable chair according to claim 1, characterized in that: The connecting member includes a plurality of connecting columns installed on the side of the first support plate away from the first abutment surface, and a plurality of movable grooves are correspondingly arranged on the second support plate. The connecting columns can move up and down in the corresponding movable grooves, and each connecting column passes through the corresponding movable groove and is fixedly connected to the first bracket.

5. The adjustable chair according to any one of claims 1 to 4, characterized in that: The operating member is rotatably connected to the first bracket, one end of the locking member is connected to the first frame, and the other end is provided with an extrusion portion toward the second support plate. In the locked state, the operating member can press the locking member to drive the extrusion portion to fit against the side of the second support plate to limit the relative movement of the second support plate.

6. The adjustable chair according to claim 5, characterized in that: A receiving groove for accommodating the operating member is provided on a side of the first frame away from the second support plate, the operating member is rotatably connected to a side wall of the receiving groove via a rotating shaft, and a protruding extrusion block is provided on a side of the operating member close to the receiving groove; A through hole is provided at the bottom of the storage groove, the locking piece is installed in the through hole, one end of the locking piece is connected to the wall of the through hole, the operating piece rotates into the storage groove when in the locked state, and the extrusion block pushes the locking piece to leave the through hole and fit with the side of the second support plate to limit the relative movement of the second support plate; the operating piece rotates out of the storage groove when in the unlocked state, and the locking piece is located in the through hole.

7. The adjustable chair according to claim 1, characterized in that: The seat back rotating member comprises two seat back rotating components respectively connected to the seat frame and the seat back frame at both sides; The chair back rotating assembly comprises a shell connected to the bracket on the same side of the seat component, a rotating member connected to the bracket on the same side of the chair back component, and a limiting structure for limiting the position of the rotating member in the shell, wherein the limiting structure comprises a control limiting member and a reset member movably connected to the shell, and the rotating member can rotate in the shell; The manipulation limiter can limit at least one position of the rotating member in the housing when in a locked state, and the rotating member can rotate in the housing when the manipulation limiter is in an unlocked state under external force.

8. The adjustable chair according to claim 7, characterized in that: The end of the rotating member is provided with a first protrusion, and the shell is provided with a second protrusion facing inward near the seat component. The control limiter is rotatably connected to the shell through a rotating shaft, and the control limiter includes a limiter and an operating part connected to one end of the limiter, and a locking part is provided at one end of the limiter away from the operating part; When the control limiter is in the locked state, the locking portion abuts against the first protrusion to limit the rotation of the rotating member relative to the shell in the direction away from the seat component; when the control limiter is in the unlocked state, the first protrusion is separated from the locking portion and can be rotated to abut against the second protrusion, at which time the seat back component takes the second posture.

9. The adjustable chair according to claim 8, characterized in that: The seat back rotating component further includes a synchronization rod, and two ends of the synchronization rod are respectively connected to the operating parts of the seat back rotating components on both sides.

10. The adjustable chair according to claim 9, characterized in that: The seat component includes a seat bracket and a foot support component installed at the lower part of the seat bracket, the foot support component includes two mounting seats fixed on both sides of the seat bracket, a connecting rod that can move along the corresponding mounting seats, and a foot support plate, the foot support plate is connected to the ends of the two connecting rods and can be flipped relative to the connecting rods.

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