Chair

Abstract

A chair is disclosed. The chair of the present invention comprises: a chair body provided with a base frame; a first support which is provided on the base frame to support the hip and back of a user, and is moved in correspondence with the movement of the user; and a second support which is provided on the base frame to elastically support the first support and is moved in correspondence with a back support body of the first support when the first support moves, and thus the chair can change the posture thereof with a wide range through interactions among triple supports, and can maintain the overall balance by moving the center of gravity according to the posture of the user.

Description

chair

[0001] The present invention relates to a chair, and more particularly, to a chair that operates in response to the user's movements and automatically adjusts the angle of the position from an angle at which the user can perform concentrated work to an angle at which the user can lie down and rest.

[0002] Typically, office or student chairs are used alongside desks for work or study at work or home, and typically differ in technology from seats installed in automobiles. One component of these office chairs, the seat, serves to support the user's buttocks.

[0003] Most of these conventional chairs have legs that are not fixed to the floor, so the entire chair, including the legs, can be moved freely. These chairs have been proposed to have various functions, such as height adjustment, rotation, and backrest angle adjustment.

[0004] Recently, modern people spend more and more time sitting in chairs, and as a result, when sitting on a chair for a long time, the load of the upper body is concentrated on the sacrum and hip joint, causing pain and stiffness due to the force applied to the hard seat of the chair. As a result, users change their sitting posture to reduce the pain, but this poor posture can continue, which can strain the lower back or cause diseases such as scoliosis. In addition, the buttocks are pressed against the seat, making sitting uncomfortable, metabolism is not smooth, skin color changes, and dead skin cells are produced, which is bad for health and beauty.

[0005] Conventional chairs lack ergonomic support for the user's movements because the parts that support the user's back and the parts that support the buttocks do not move in sync, and thus, improvements are needed.

[0006] However, although curved chairs have been introduced in the past, they are limited to sitting chairs that are used in contact with the floor, such as in rooms or on the floor, or placed on existing chairs, and thus have limitations in using them as general office or desk chairs.

[0007] The above-described technical configuration is background technology to help understand the present invention, and does not mean a conventional technology widely known in the technical field to which the present invention belongs.

[0008] Therefore, the technical problem to be achieved by the present invention is to provide a chair that moves in response to the user's movements and automatically adjusts the angle of the position from an angle at which the user can perform concentrated work to an angle at which the user can lie down and rest.

[0009] According to one aspect of the present invention, a chair may be provided, comprising: a chair body having a base frame; a first support part provided on the base frame to support a user's hips and back and move in response to the user's movement; and a second support part provided on the base frame to support the first support part and move in response to a back support body of the first support part when the first support part moves, wherein the second support part supports a rolling movement of a hip support body of the first support part and elastically supports a back support body of the first support part.

[0010] The first support part may include a hip support body that is movably provided on the base frame to support the user's hips; a back support body that is connected to the hip support body to support the user's back and is supported by the second support part; and a rotation guide member that is rotatably coupled to the back support body and is guided by a guide arm provided on the second support part to guide the rotation of the first support part.

[0011] The second support part may include a base support body that supports the back support body; a connecting plate having one side connected to the base frame and the other side connected to the base support body; a guide arm provided on the connecting plate that guides the movement of the back support body; and a first elastic support part that is provided on the base support body to elastically support the back support body.

[0012] The above chair body may further include a leg support that is provided to move on the base frame and supports the user's legs, and may further include a center of gravity moving part that is provided on the second support part and controls the movement of the center of gravity of the first support part.

[0013] In addition, according to another aspect of the present invention, a chair may be provided, including a chair body having a base frame and a base support arm provided on the base frame; a first support part spaced apart from the base frame to support a user's hips and back and to move in response to the user's movement; and a second support part disposed between the base frame and the first support part to support the first support part and to move in response to a back support body of the first support part when the first support part moves, wherein when the back support body and the base support body of the second support part are tilted backward, the first support part and the second support part move forward.

[0014] The first support part may further include a base roller that is provided to rotate on the base support arm; and at least one base support roller that is provided to rotate on the base frame to support a connecting plate of the second support part. The second support part may further include a roller member that is provided on the base support body and is connected to the base roller to prevent the base roller (160) from being separated from the base support body (310).

[0015] The above-mentioned back support body further includes a lumbar support that supports the user's back, and the lumbar support moves rearward when the back support body is tilted rearward to prevent interference with the user's back.

[0016] According to one aspect of the present invention, a chair may be provided, comprising: a chair body having a base frame; a first support unit disposed on the base frame to support a user's hips and back; and a second support unit disposed on the base frame to support the first support unit, wherein when the first support unit is tilted backward, an area of ​​the second support unit that supports the user's hips moves forward.

[0017] The first support unit may include a first hip support portion that is positioned on the upper portion of the base frame and supports an area of ​​the second support unit that supports the user's hips; a first back support portion that is connected to the first hip support portion and supports the user's back; and a first elastic support portion that is positioned on the first back support portion and is elastically supported by the second support unit in an area corresponding to the first back support portion when the first back support portion is tilted backward.

[0018] The second support unit may include a second hip support unit that is movably supported on the base frame and to which the first hip support unit is coupled; a second back support unit that is rotatably coupled to the chair body and connected to the second hip support unit; and a stopper unit provided on the second hip support unit to limit movement of the second hip support unit.

[0019] The second hip support part may include a second hip support body to which the first hip support body of the first hip support part is detachably coupled at the upper portion; and a second hip support frame to which the second hip support body is detachably coupled and which is coupled to move in the front-back direction of the base frame, and the chair body may further include a body elastic support part provided on the base frame to elastically support movement of the second hip support frame.

[0020] The first support unit may further include a lumbar support unit provided on the first support unit to support the user's lumbar region.

[0021] Embodiments of the present invention can provide a chair that moves in response to the user's movements and automatically adjusts the angle of the position from an angle where the user can perform concentrated work to an angle where the user can lie down and rest.

[0022] Additionally, the hip support body and back support body move in response to the user's movements to more efficiently support the user's back and hip areas.

[0023] Furthermore, when the first support part tilts, the second support part supports the first support part, and the second support part is supported by the third support part, so that the movement can be performed stably and the tilting movement can also be performed smoothly.

[0024] In addition, when the back support body and the base support body tilt backward, the center of gravity moves due to the forward movement of the center of gravity or the first and second support parts, thereby preventing the risk of the chair tipping over.

[0025] FIG. 1 is a side view schematically illustrating a chair according to one embodiment of the present invention.

[0026] Figure 2 is an exploded side view schematically illustrating the first support shown in Figure 1 separated from the second support.

[0027] FIG. 3 is a schematic diagram of the operation of the lumbar support shown in FIG. 1, in which the support moving part is operated by the rotation of the rotation guide member, thereby moving the lumbar support backward.

[0028] Figure 4 is an enlarged view of the area of ​​the lumbar support shown in Figure 3.

[0029] Fig. 5 is another embodiment of the lumbar support shown in Fig. 3.

[0030] Fig. 6 is a schematic drawing showing the first support and the second support shown in Fig. 1 tilted backward.

[0031] Fig. 7 is a schematic diagram of the operation of this embodiment, showing the process in which the back support body is supported by the base support body and tilts.

[0032] Figure 8 is a schematic drawing of the center of gravity moving part of this embodiment.

[0033] Figure 9 is an operating diagram of the center of gravity moving unit illustrated in Figure 8.

[0034] Fig. 10 is a schematic drawing of the support plate illustrated in Fig. 1.

[0035] FIG. 11 is a side view schematically illustrating a chair according to another embodiment of the present invention.

[0036] FIG. 12 is a schematic drawing showing the back support body and base support body shown in FIG. 11 tilted backwards and the hip support body and connecting plate moved forwards.

[0037] Fig. 13 is an enlarged view of the area of ​​the base roller shown in Fig. 11.

[0038] In order to fully understand the present invention, its operational advantages, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

[0039] Hereinafter, the present invention will be described in detail by describing preferred embodiments thereof with reference to the attached drawings. The same reference numerals in each drawing represent the same components.

[0040] FIG. 1 is a side view schematically illustrating a chair according to one embodiment of the present invention, FIG. 2 is an exploded side view schematically illustrating a first support part illustrated in FIG. 1 separated from a second support part, FIG. 3 is an operation diagram of the lumbar support illustrated in FIG. 1, schematically illustrating that the support moving part is operated by rotation of a rotation guide member to move the lumbar support rearward, FIG. 4 is an enlarged view illustrating an area of ​​the lumbar support illustrated in FIG. 3, and FIG. 6 is another embodiment of the lumbar support illustrated in FIG. 3.

[0041] Also, FIG. 6 is a drawing schematically illustrating the first support part and the second support part illustrated in FIG. 1 being tilted backward, FIG. 7 is a drawing schematically illustrating the process in which the back support body is tilted while being supported by the base support body as an operation diagram of the present embodiment, FIG. 8 is a drawing schematically illustrating the center of gravity moving part of the present embodiment, FIG. 9 is an operation diagram of the center of gravity moving part illustrated in FIG. 8, and FIG. 10 are examples of drawings schematically illustrating the support plate illustrated in FIG. 1.

[0042] As shown in these drawings, the chair (1) according to the present embodiment comprises a chair body (100) having a base frame (110), a first support part (200) provided on the base frame (110) to support the user's buttocks and back and move in response to the user's movement, a second support part (300) provided on the base frame (110) to elastically support the first support part (200) and move in response to the back support body (220) of the first support part (200) when the first support part (200) moves, a third support part (400) connected to the second support part (300) to elastically support the base support body (310) of the second support part (300), and a center of gravity moving part (500) provided on the base frame (110) and the second support part (300) to control the movement of the center of gravity of the first support part (200).

[0043] As illustrated in FIG. 1, the chair body (100) includes a base frame (110), a support post (120) that supports the bottom of the base frame (110), a plurality of support legs (130) provided on the support post (120), and a plurality of wheel members (140) provided on the plurality of support legs (130).

[0044] The leg support provided on the chair body (100) is provided to be extended to the front of the chair body (100) and can support the user's leg area.

[0045] In the present embodiment, the leg support member includes a load detection sensor installed on the hip support body (210) or the base frame (110) to detect the user's load, and a driving means installed on the base frame (110) to extend the leg support member forward or return it to its original position. In the present embodiment, the driving means may include a known driving part including a cylinder or a motor.

[0046] Additionally, in this embodiment, the leg support can be controlled to operate only when the first support (200) tilts backwards of the chair body (100).

[0047] The first support member (200) is provided on the base frame (110) to support the user's hips and back and can move in response to the user's movements.

[0048] In the present embodiment, the first support member (200) includes, as shown in FIG. 1, a hip support body (210) that is provided to move the base frame (110) and to support the user's hips, a back support body (220) that is provided to be connected to the hip support body (210) and to support the user's back and is supported by the second support member (300), a rotation guide member (230) that is provided to be rotated on the back support body (220) and to guide the tilting movement of the back support body (220), and a support moving member (240) that is provided on the back support body (220) and to be connected to the rotation guide member (230) and to move a lumbar support (221) provided on the back support body (220).

[0049] The hip support body (210) of the first support part (200) supports the user's hip, and as shown in FIG. 1, includes a support plate (211) and a body hole (212) provided on the side wall of the hip support body (210) to support the guide roller (321) of the second support part (300) on the side wall of the hip support body (210).

[0050] In this embodiment, the support plate (211) directly supports the user's buttocks, and as shown in FIG. 10, includes a flat portion (211a) and a curved portion (211b) that is convexly curved in the direction of the support leg (130) at the end of the flat portion (211a).

[0051] In this embodiment, when the first support member (200) tilts backward, the flat part (211a) that supports the user's buttocks is placed on the connecting plate (320), so that the rotation guide member (230) can be smoothly connected to the guide arm (330).

[0052] In this embodiment, the flat portion (211a) may be provided in an area close to the back support body (220) of the first support portion (200).

[0053] And in the present embodiment, a pair of guide rollers (321) may be provided on the side wall of the hip support body (210) provided with the body hole (212), as illustrated in Fig. 1. In the present embodiment, the pair of guide rollers (321) may support the hip support body (210) when the hip support body (210) is tilted, thereby ensuring that the hip support body (210) is tilted stably.

[0054] The back support body (220) of the first support member (200) supports the user's back and can move together with the hip support body (210) when the user moves.

[0055] In the present embodiment, the back support body (220) may be provided with a lumbar support (221) that supports the user's lumbar spine, as illustrated in FIG. 1. In the present embodiment, the lumbar support (221) is moved backward by the support moving part (240) when the back support body (220) is tilted backward, as illustrated in FIG. 7, thereby minimizing discomfort caused by the user's back being pressed by the lumbar support (221) when lying down on their back.

[0056] In addition, in the present embodiment, the lumbar support (221) can be operated by being directly connected to the support moving part (240), as illustrated in FIG. 5. That is, the connecting member (242) connecting the rotation guide member (230) and a pair of support rollers (241) is connected to the lumbar support (221) rather than the back support body (220), thereby moving the lumbar support (221) in the forward and backward direction.

[0057] The rotation guide member (230) of the first support member (200) is rotatably coupled to the back support body (220) and is supported by a guide arm (330) provided in the second support member (300) when the first support member (200) moves backwardly, so that it can move together with the back support body (220).

[0058] In this embodiment, a plurality of gear teeth are provided on the rotation guide member (230) and can be meshed with the gear teeth provided on the guide arm (330).

[0059] Additionally, in this embodiment, the rotation guide member (230) can be connected to a plurality of support rollers (241) provided on the back support body (220) by a connecting member (242).

[0060] The support movable part (240) of the first support part (200) includes, as shown in FIG. 3, a pair of support rollers (241) in which one is rotatably connected to the upper part of the lumbar support (221) and the other is positioned higher, and a connecting member (242) that connects the pair of support rollers (241), the back support body (220), and the rotation guide member (230) to transmit the rotational force of the rotation guide member (230) to the lumbar support (221) to adjust the degree of protrusion of the lumbar support (221).

[0061] In the present embodiment, the rotational force of the rotation guide member (230) is transmitted to the connecting member (242), and the connecting member (242) is connected to the upper end of the lumbar support (221) as illustrated in FIG. 3, so that the lumbar support (221) can be moved rearward. Accordingly, when the user is lying down on his or her back, the portion of the lumbar support (221) that protrudes forward of the back support body (220) is almost eliminated, thereby preventing the user's back from being uncomfortable due to interference by the lumbar support (221), i.e., being pressed against the lumbar support (221).

[0062] The second support member (300) is provided on the base frame (110) to elastically support the first support member (200), and when the first support member (200) moves, some of the components can move in correspondence with the back support body (220) of the first support member (200), as shown in FIG. 7.

[0063] In the present embodiment, the second support part (300) includes, as illustrated in FIG. 1, a base support body (310) that supports the back support body (220) of the first support part (200), a connecting plate (320) that is connected to the base frame (110) on one side and connected to the base support body (310) on the other side, a guide arm (330) that is provided on the connecting plate (320) to guide the movement of the base support body (310) and also to guide the movement of the back support body (220), a first elastic support part (340) that is provided on the base support body (310) to elastically support the back support body (220), and a head support part (350) that is provided on the base support body (310) to support the user's head.

[0064] The base support body (310) of the second support member (300) can move to tilt backwards like the back support body (220), as shown in FIG. 6.

[0065] The connecting plate (320) of the second support member (300) may be provided such that one side is connected to the base frame (110) and the other side is provided such that the base support body (310) is tilted rearward.

[0066] In this embodiment, the connecting plate (320) is directly connected to the base support body (310), and the base support body (310) is provided with its own elasticity so that it can move to tilt backwards, and can also be connected to the back support body (220) using the guide arm (330) as a connecting medium.

[0067] In addition, in the present embodiment, a gear is provided on the bottom surface of the connecting plate (320), as illustrated in FIG. 2, and this gear is gear-meshed with the driving gear (530) of the center of gravity moving unit (500). As a result, when the center of gravity is moved and the driving gear (530) is operated, the chair body (100) can be moved rearward, as illustrated in FIG. 9. In the present embodiment, the chair body (100) may be arranged to maintain its position while the remaining components are moved.

[0068] Furthermore, in the present embodiment, the connecting plate (320) may be provided with a guide roller (321), as illustrated in FIGS. 1 and 2. In the present embodiment, the guide roller (321) is provided to rotate on the side of the connecting plate (320) so as to stably and smoothly support the hip support body (210) when the first support part (200) tilts backward or returns to its original position. That is, in the present embodiment, the guide roller (321) is provided to contact an area of ​​the hip support body (210) where the body hole (212) is provided so as to support the hip support body (210). In the present embodiment, the guide roller (321) may be provided in pairs spaced apart from each other on the side of the base frame (110).

[0069] The guide arm (330) of the second support member (300) is provided on the connecting plate (320) to guide the movement of the rotation guide member (230) when the first support member (200) tilts backward, and can also guide the base support body (310) to tilt backward.

[0070] In this embodiment, the guide arm (330) may be provided on each side of the connecting plate (320), and may be provided with gear teeth to engage with the rotation guide member (230).

[0071] The first elastic support member (340) of the second support member (300) is provided on the base support body (310) as shown in FIG. 3 and can elastically support the support body (220) by tilting.

[0072] In the present embodiment, the first elastic support member (340), as illustrated in FIG. 3, includes a first support block (341) provided on a base support body (310), a first elastic support member (342) rotatably coupled to the first support block (341), a first support ball (343) provided on the first elastic support member (342) to support the back support body (220), and a first spring member (344) having one side provided on the base support body (310) and the other side connected to the first elastic support member (342) to support the first elastic support member (342).

[0073] In the present embodiment, before the back support body (220) is tilted backward, the first support ball (343) of the first elastic support member (340) and the back support body (220) are spaced apart from each other, as illustrated by the dotted line in FIG. 7. In this state, when the user's load is applied to the back support body (220), the back support body (220) is tilted backward, and when the load continues to be applied to the back support body (220), the back support body (220) comes into contact with the first support ball (343) and the elastic spring (344) contracts. When the load continues to be applied to the back support body (220), the first support ball (343) also comes into contact with the back base support body (310), so that the back support body (220) and the base support body (310) are tilted backward together, and can become the state illustrated by the solid line in FIG. 7. In this state, the second elastic spring (344) of the second support (300) is also contracted.

[0074] The head support part (350) of the second support part (300) is provided on the upper part of the base support body (310), as shown in FIG. 1, and can support the user's head or neck.

[0075] The third support member (400), as shown in FIG. 2, elastically supports the second support member (300), and includes a support plate (410) coupled to a connecting plate (320), as shown in FIG. 2, and a second elastic support member (420) coupled to the support plate (410) on one side and the base support body (310) on the other side to elastically support the base support body (310).

[0076] In the present embodiment, the second elastic support member (420) includes, as illustrated in FIG. 1, a second support block (421) provided on a support plate (211), a second elastic support member (422) rotatably connected to the second support block (421), a second support ball (423) provided on the second elastic support member (422) to support the back support body (220), and a second elastic spring (424) provided on one side of the base support body and connected to the second elastic support member (422) to support the second elastic support member (422).

[0077] The center of gravity moving unit (500) can move the center of gravity of the chair to match the moved center of gravity when the center of gravity of the chair is moved by the user lying down or the like.

[0078] In this embodiment, the center of gravity moving unit (500) includes, as illustrated in FIG. 8, a first pressure sensor (510) provided on the connecting plate (320) to detect pressure applied to the connecting plate (320), a second pressure sensor (520) provided on the connecting plate (320) to be spaced apart from the first pressure sensor (510) to detect pressure applied to the connecting plate (320), and a driving gear (530) that is provided to rotate on the base frame (110) and engages with a gear provided on the bottom surface of the connecting plate (320) to move the second support unit (300).

[0079] In this embodiment, the first pressure sensor (510) may be placed between one guide roller (321) and a guide arm (330), as shown in FIG. 8, and the second pressure sensor (520) may be placed between a pair of guide rollers (321).

[0080] In this embodiment, the driving gear (530) can be rotated by being connected to a driving means, for example, a driving motor, provided on the base frame (110).

[0081] In Fig. 9, the chair body (100) is shown as being moved, but this is not limited to this and the second support part (300) may be arranged to be moved.

[0082] FIG. 11 is a side view schematically illustrating a chair according to another embodiment of the present invention, FIG. 12 is a drawing schematically illustrating the back support body and base support body illustrated in FIG. 11 tilted backwards and the hip support body and connecting plate moved forward, and FIG. 13 is a drawing magnifying the area of ​​the base roller illustrated in FIG. 11.

[0083] The chair (1a) according to the present embodiment differs from the above-described embodiment in that it has a simple structure and secures safety by moving the center of gravity using a mechanical mechanism when tilted, as shown in FIG. 11.

[0084] As shown in Fig. 11, the chair body (100a) is provided with a base support arm (150) that protrudes upward at the rear end of the base frame (110a), and a base roller (160) is rotatably coupled to the upper portion of the base support arm (150).

[0085] In the present embodiment, the structure in which the base roller (160) and the roller member (360) are connected to the connecting portion can have a separation prevention function to prevent the base support body (310) from being separated when the base support body (310) is tilted. In addition, the base support body (310) can be naturally tilted by the rolling friction between the base support body (310) and the base roller (160).

[0086] In this embodiment, as shown in FIG. 12, a plurality of base support rollers (170) are spaced apart from each other on the upper surface of the base frame (110) to guide the forward and backward movement of the connecting plate (320).

[0087] As described above, a roller member (360) may be provided on the base support body (310) of the second support member (300) (300a).

[0088] The lumbar support (221) of the present embodiment and the previously described embodiment may be arranged so that most of it is located at the rear of the back support body (220), as shown in FIG. 14.

[0089] FIG. 14 is a perspective view schematically illustrating a chair according to one embodiment of the present invention, FIG. 15 is a rear perspective view of FIG. 1, FIG. 16 is a right side view of FIG. 1, FIG. 17 is a rear view of FIG. 1, FIG. 18 is a perspective view illustrating a main part of FIG. 1, and FIG. 19 is a left side view of FIG. 18.

[0090] Also, FIG. 20 is a perspective view showing the first support unit and lumbar support shown in FIG. 18, FIG. 21 is a front view of FIG. 20, FIG. 22 is an enlarged perspective view showing the first elastic support shown in FIG. 20, FIG. 23 is a perspective view showing the second support unit shown in FIG. 18, FIG. 24 is a right side view of FIG. 23, and FIG. 25 is an exploded perspective view of the stopper shown in FIG. 23.

[0091] Furthermore, FIG. 26 is a perspective view showing a configuration excluding the second hip support body shown in FIG. 23, FIG. 27 is a plan view of FIG. 26, FIG. 28 is a perspective view showing a configuration excluding the second lever and the third lever shown in FIG. 26, FIG. 29 is an exploded perspective view showing the second hip support frame shown in FIG. 28 separated from the base frame, FIG. 30 is a perspective view showing a state of use of the present embodiment in which a user is seated on a chair, and FIG. 31 is a perspective view showing a state in which the user shown in FIG. 30 is lying backward.

[0092] As shown in these drawings, the chair (1b) according to the present embodiment includes a chair body (1000) having a base frame (1100), a first support unit (2000) disposed on the base frame (1100) to support the user's hips and back, a second support unit (3000) disposed on the base frame (1100) to support the first support unit (2000), a lumbar support unit (4000) disposed on the first back support unit (2200) of the first support unit (2000) to support the user's lumbar spine, and a lever unit (5000) disposed on the chair body (1000) and the second support unit (3000).

[0093] The chair body (1000), as illustrated in FIG. 15, comprises a base frame (1100), a support post (1200) for supporting the bottom of the base frame (1100), a plurality of support legs (1300) provided on the support post (1200), a plurality of wheel members (1400) provided on the plurality of support legs (1300), a base support arm (1500) provided at the rear of the base frame (1100) to which the second back support frame (3210) of the second support unit (3000) and the lumbar connection link (4300) of the lumbar support unit (4000) are coupled, a body elastic support unit (1600) provided on the base frame (1100) for elastically supporting the movement of the second hip support frame (3120) of the second support unit (3000), and a bending member provided on the upper portion of the base frame (1100). It includes a frame (1700), a plurality of main body support rollers (1800) that are coupled to the bending frame (1700) and support the side walls of the second hip support frame (3120), and a leg support member (1900) that is coupled to the front of the base frame (1100) and is raised by the second hip support frame (3120) when the second hip support frame (3120) moves forward to support the user's feet.

[0094] In this embodiment, the main body elastic support member (1600) guides the second hip support frame (3120) to move in the longitudinal direction of the base frame, and as illustrated in FIG. 15, includes a main body elastic support body (1610) provided on the base frame (1100), a main body elastic support shaft (1620) having one end coupled to the main body elastic support body (1610), and a main body spring (1630) coupled to the main body elastic support shaft (1620).

[0095] The first support unit (2000) directly supports the user's back and hip area, and includes a first hip support (2100) disposed on the upper portion of the base frame (1100) to support the area of ​​the second support unit (3000) that supports the user's hip, a first back support (2200) that is connected to the first hip support (2100) to support the user's back, and a first elastic support (2300) that is provided on the first back support (2200) and elastically supported by the second support unit (3000) in an area corresponding to the first back support (2200) when the first back support (2200) is tilted backward.

[0096] The first hip support (2100) of the first support unit (2000) directly supports the user's hip, and as shown in FIG. 20, includes a first hip support body (2110), a first support arm (2120) provided at the rear of the first hip support body (2110), a lumbar support shaft (2130) provided on the first hip support body (2110) in the area where the first support arm (2120) is provided and supports the lumbar support (4000), a detachment prevention body (2140) provided on the side wall of the first hip support body (2110) and supported by a stopper roller (3350) of a stopper part (3300), and a detachment prevention unit (2140) that is detachably coupled to the detachment prevention body (2140) and blocks one side of a prevention hole (2141) provided on the detachment prevention body (2140). It includes a cover (2150) and a first spring (2160) that is coupled to a lumbar support shaft (2130) and elastically supports a first back support frame (2210).

[0097] In this embodiment, the lower surface of the first hip support body (2110) can be supported on the upper surface of the second hip support body (3110) illustrated in FIG. 23, and can be prevented from coming off by being caught and supported by the stopper roller (3350) of the stopper portion (3300).

[0098] The first back support member (2200) of the first support unit (2000) can be rotatably coupled to the lumbar support shaft (2130), as illustrated in FIG. 20.

[0099] In the present embodiment, the first back support member (2200) includes a first back support frame (2210) that is rotatably coupled to a lumbar support axis (2130), as illustrated in FIG. 20, and a first back support body (2220) that is coupled to the first back support frame (2210).

[0100] In the present embodiment, the first support frame (2210) may be provided with a first lumbar protrusion hole, as illustrated in FIG. 22.

[0101] In the present embodiment, the first back support body (2220) may be provided with a second lumbar protrusion hole, as illustrated in Fig. 1. In the present embodiment, the first lumbar protrusion hole (2211) and the second lumbar protrusion hole (2221) may be provided to be in communication with each other so that the lumbar support (4100) of the lumbar support member (4000) may move in the front-back direction of the first back support body.

[0102] The first elastic support member (2300) of the first support unit (2000) is coupled to the rear of the first back support frame (2210), as illustrated in FIG. 22, so that when the first back support frame (2210) tilts rearward, the first back support body (2220) can be smoothly supported by the second back support body.

[0103] In the present embodiment, the first elastic support member (2300) includes, as illustrated in FIG. 22, a first elastic support shaft (2310) coupled to the upper rear of the first back support frame (2210), a first elastic support body (2320) rotatably coupled to the first elastic support shaft (2310), a first elastic spring (2330) coupled to the first elastic support shaft (2310) on one side and supporting the inside of the first elastic support body (2320) on the other side, and a first elastic support roller (2340) provided at the lower end of the first elastic support body (2320).

[0104] In this embodiment, when the first back support member (2200) is tilted toward the second back support member (3200) and comes into contact with the second back support frame (3210), the area of ​​the first elastic support body (2320) to which the first elastic support roller (2340) shown in FIG. 22 is coupled moves closer to the first back support frame (2210), thereby elastically supporting the first back support member (2200).

[0105] The second support unit (3000) is provided on the base frame (1100) to support the first support and, at the same time, to move forward when the first back support (2200) tilts backward, thereby causing the center of gravity to move forward, thereby preventing the chair body (1000) from falling over.

[0106] In the present embodiment, the second support unit (3000) includes, as illustrated in FIG. 26, a second hip support (3100) that is movably supported on a base frame (1100) and to which a first hip support (2100) is coupled, a second back support (3200) that is rotatably coupled to the chair body (1000) and connected to the second hip support (3100), and a stopper (3300) provided on the second hip support (3100) to limit movement of the second hip support (3100).

[0107] The second hip support (3100) of the second support unit (3000) includes, as illustrated in FIG. 25, a second hip support body (3110) and a second hip support frame (3120) that is detachably coupled to the lower portion of the hip support body and is coupled to move in the front-back direction of the base frame (1100).

[0108] In this embodiment, as shown in FIG. 25, a receiving groove (3111) is provided on each side wall of the second hip support body (3110), and a stopper part (3300) can be detachably coupled to the receiving groove (3111).

[0109] In the present embodiment, a plurality of first connecting pieces (3121) may be spaced apart from each other on the upper portion of the second hip support frame (3120), as illustrated in FIG. 26. In the present embodiment, the plurality of first connecting pieces (3121) may be detachably connected to the lower surface of the second hip support body (3110) using screws or bolts.

[0110] In the present embodiment, the second hip support frame (3120) may be provided with a movement guide hole (3122), as illustrated in FIG. 29. In the present embodiment, the movement guide holes (3122) may be provided in the longitudinal direction of the second hip support frame (3120), and a pair may be spaced apart from each other. In the present embodiment, the main body elastic support part (1600) may be exposed to the upper portion of the movement guide hole (3122), as illustrated in FIG. 28.

[0111] In the present embodiment, a pair of second connecting pieces (3123) may be provided spaced apart from each other at the rear of the second hip support frame (3120), as illustrated in FIG. 29. In the present embodiment, the rear end of the main body elastic support shaft (1620) may be supported by the second connecting piece (3123), as illustrated in FIG. 26. In the present embodiment, when the second hip support frame (3120) moves forward based on FIG. 26, the main body elastic support shaft (1620) may be exposed to the rear of the second connecting piece (3123) by a distance equal to the movement distance of the second hip support frame (3120).

[0112] As illustrated in FIG. 16, the second back support (3200) of the second support unit (3000) has one side rotatably coupled to the base support arm (1500) and the other side rotatably coupled to the second hip support frame (3120), and can provide power to move the second hip support frame (3120) forward when the first back support (2200) tilts backward.

[0113] In the present embodiment, the second back support (3200) includes a second back support frame (3210) whose lower part is rotatably connected to the base support arm (1500), as illustrated in FIG. 26, and a head support (3220) provided at the upper end of the second back support frame (3210).

[0114] In the present embodiment, a frame connecting link (3211) that is rotatably connected to a second hip support frame (3120) may be provided at the lower end of the second back support frame (3210), as illustrated in FIG. 28. In the present embodiment, a first hole (3212) and a second hole (3213) are provided in the second back support frame (3210), as illustrated in FIG. 28, and a lumbar connecting link (4300) of a lumbar support unit (4000) may be inserted into the first hole (3212), and a lumbar cover (4200) of a lumbar support unit (4000) may be inserted into the second hole (3213). The lumbar cover (4200) inserted into the second hole (3213) may protrude toward the rear of the second back support frame (3210), as illustrated in FIG. 31.

[0115] In addition, in the present embodiment, a sliding guide hole (3214) may be provided at the lower portion of the second support frame (3210) so that the lower portion of the second support frame (3210) can slide with the base support arm (1500) as the reference axis, as illustrated in FIG. 28.

[0116] The stopper part (3300) of the second support unit (3000) is provided on the second hip support body (3110), as shown in FIG. 25, and is supported by being caught on the prevention hole (2141) of the separation prevention body (2140), thereby preventing the second hip support body (3110) from being separated.

[0117] In this embodiment, the stopper part (3300) includes, as illustrated in FIG. 25, a stopper body (3310) that is detachably coupled to a receiving groove (3111) of a second hip support body (3110) using a screw or bolt, a stopper shaft (3320) whose both ends are coupled to the inner wall of the stopper body (3310), a stopper spring (3330) that is flexibly and loosely coupled to the stopper shaft (3320), a moving block (3340) that is movably coupled to the stopper shaft (3320) and elastically supported by the stopper spring (3330), and a stopper roller (3350) that is rotatably coupled to the moving block (3340) and is supported by being caught in a prevention hole (2141) of a separation prevention body (2140).

[0118] In this embodiment, the moving blocks (3340) are spaced apart from each other in pairs, as shown in FIG. 25, and one pair of moving blocks (3340) can be elastically supported by a stopper spring (3330).

[0119] The lumbar support (4000) can be provided on the first back support (2200) to support the user's lumbar region, as shown in FIG. 20.

[0120] In the present embodiment, the lumbar support (4000) includes, as illustrated in FIG. 1, a plurality of lumbar supports (4100) that are arranged to protrude forward of the first back support body (2220), a lumbar cover (4200) that is arranged at the rear of the first back support frame (2210) to support the plurality of lumbar supports (4100) so that they do not come off, and when the first back support frame (2210) is tilted backward, as illustrated in FIG. 31, protrudes backward of the second back support frame (3210), and a lumbar connecting link (4300) that is arranged at the lower portion of the lumbar cover (4200) and is rotatably coupled to the first support arm (2120), as illustrated in FIG. 20.

[0121] In the present embodiment, a link hole (4310) is provided in the lumbar connecting link (4300), as illustrated in FIG. 20, and the lumbar connecting link (4300) can be connected to the first support arm through the link hole (4310). In addition, in the present embodiment, the link hole (4310) is provided in a curved manner so as to guide the lumbar connecting link (4300) to rotate in a semi-elliptical direction.

[0122] The lever unit (5000) includes a first lever (5100) provided on the first hip support unit (2100), as illustrated in FIG. 2, and a second lever (5200) and a third lever (5300) provided on the second hip support unit (3100), as illustrated in FIG. 27.

[0123] Description of the symbol

[0124] 1,1a,1b: Chair

[0125] 100,100a: Chair body 110,110a: Base frame

[0126] 111: Flat part 112: Curved part

[0127] 120: Support post 130: Support leg

[0128] 140: Wheel member 150: Base support arm

[0129] 160: Base roller 170: Base support roller

[0130] 200,200a: 1st support 210: Hip support body

[0131] 211: Support plate 211a: Flat part

[0132] 211b: Bend section 212: Body hole

[0133] 220: Back support body 221: Lumbar support

[0134] 230: Rotating guide member 240: Pedestal moving part

[0135] 241: Support roller 242: Connecting member

[0136] 300: Second support 310: Base support body

[0137] 320: connecting plate 321: guide roller

[0138] 330: Guide arm 340: First elastic support

[0139] 341: First support block 342: First elastic support

[0140] 343: First support ball 344: First elastic spring

[0141] 350: Head support 360: Roller member

[0142] 400: Third support 410: Support plate

[0143] 420: Second elastic support member 421: Second support block

[0144] 422: Second elastic support 423: Second support ball

[0145] 424: Second elastic spring 500: Center of gravity

[0146] 510: First pressure sensor 520: Second pressure sensor

[0147] 530: Drive gear

[0148] 1000: Chair body 1100: Base frame

[0149] 1200: Support Post 1300: Support Bridge

[0150] 1400: Wheel member 1500: Base support arm

[0151] 1600: Main body elastic support 1610: Main body elastic support body

[0152] 1620: Body elastic support axis 1630: Body spring

[0153] 1700: Bending frame 1800: Body support roller

[0154] 1900: Bridge support 2000: First support unit

[0155] 2100: First hip support 2110: First hip support body

[0156] 2120: 1st support arm 2130: Lumbar support axis

[0157] 2140: Anti-separation body 2141: Anti-separation hole

[0158] 2150: Anti-separation cover 2160: First spring

[0159] 2200: 1st light support 2210: 1st light support frame

[0160] 2211: 1st lumbar protrusion hole 2220: 1st back support body

[0161] 2221: Second lumbar protrusion hole 2300: First elastic support part

[0162] 2310: First elastic support axis 2320: First elastic support body

[0163] 2330: First elastic spring 2340: First elastic support roller

[0164] 3000: Second support unit 3100: Second hip support unit

[0165] 3110: Second hip support body 3111: Receiving groove

[0166] 3120: Second hip support frame 3121: First connecting piece

[0167] 3122: Moving guide hole 3123: Second connecting piece

[0168] 3200: Second light support 3210: Second light support frame

[0169] 3211: Frame connecting link 3212: First hole

[0170] 3213: 2nd hole 3214: Sliding guide hole

[0171] 3220: Head support 3300: Stopper

[0172] 3310: Stopper body 3320: Stopper shaft

[0173] 3330: Stopper spring 3340: Moving block

[0174] 3350: Stopper roller 4000: Lumbar support

[0175] 4100: Lumbar support 4200: Lumbar cover

[0176] 4300: Lumbar connecting link 4310: Link hole

[0177] 5000: Lever part 5100: First lever

[0178] 5200: 2nd lever 5300: 3rd lever

[0179] Embodiments of the present invention can provide a chair that moves in response to the user's movements and automatically adjusts the angle of the position from an angle where the user can perform concentrated work to an angle where the user can lie down and rest.

Claims

1. Chair body with base frame; A first support member provided on the base frame to support the user's hips and back and move in response to the user's movements; and A second support part is provided on the base frame to support the first support part and moves correspondingly to the support body of the first support part when the first support part moves, A chair in which the second support part supports the rolling movement of the hip support body of the first support part and elastically supports the back support body of the first support part.

2. In claim 1, The above first support part is, The hip support body is arranged to move on the above base frame and supports the user's hip; The back support body is provided to be connected to the above hip support body and supports the user's back and is supported by the second support member; and A chair including a rotation guide member that is rotatably connected to the above-mentioned back support body and is guided by a guide arm provided on the second support member to guide the rotation of the first support member.

3. In claim 1, The above second support part, A base support body that supports the above support body; A connecting plate having one side connected to the base frame and the other side connected to the base support body; A guide arm provided on the above connecting plate to guide the movement of the support body; and A chair including a first elastic support member provided on the base support body and elastically supporting the back support body.

4. In claim 1, The above chair body, Further comprising a leg support member that is arranged to move on the base frame and supports the user's legs, A chair further comprising a center of gravity moving part provided on the second support part to control the center of gravity movement of the first support part.

5. A chair body having a base frame and a base support arm provided on the base frame; A first support member that is spaced apart from the base frame and supports the user's hips and back and moves in response to the user's movements; and A second support part is disposed between the base frame and the first support part to support the first support part and moves correspondingly to the back support body of the first support part when the first support part moves. A chair in which the first support part and the second support part move forward when the base support body of the above-mentioned back support body and the second support part are tilted backward.

6. In claim 5, The above chair body, A base roller arranged to rotate on the above base support arm; and Further comprising at least one base support roller that is rotatably arranged on the base frame to support the connecting plate of the second support portion, The above second support part, A chair further comprising a roller member provided on the base support body and connected to the base roller to prevent the base roller from coming off from the base support body.

7. In claim 1 or claim 5, It further includes a lumbar support provided on the above support body to support the user's back, A chair in which the lumbar support moves backward when the back support body is tilted backward to prevent interference with the user's back.

8. Chair body with base frame; A first support unit positioned on the base frame to support the user's hips and back; and A second support unit is provided on the base frame and supports the first support unit, A chair in which the area of ​​the second support unit that supports the user's lower body moves forward when the first support unit is tilted backward.

9. In claim 8, The above first support unit, A first hip support unit positioned on the upper portion of the base frame to support an area of ​​the second support unit that supports the user's hip; A first back support member that is connected to the first hip support member and supports the user's back; and A chair including a first elastic support unit provided on the first back support unit and elastically supported by the second support unit in an area corresponding to the first back support unit when the first back support unit is tilted backward.

10. In claim 9, The above second support unit, A second hip support member that is movably supported on the base frame and to which the first hip support member is coupled; A second back support member that is rotatably connected to the chair body and connected to the second hip support member; and A chair including a stopper provided on the second hip support to limit movement of the second hip support.

11. In claim 10, The above second hip support is, A second hip support body detachably coupled to the upper portion of the first hip support body of the above first hip support; and A second hip support frame is coupled to move forward and backward in the base frame and the second hip support body is detachably coupled thereto. The above chair body, A chair further comprising a main body elastic support member provided on the base frame to elastically support movement of the second hip support frame.

12. In claim 8, A chair further comprising a lumbar support provided on the first support portion of the first support unit to support the lumbar region of the user.

Images