chair

Abstract

A chair is disclosed. The chair of the present invention includes a chair body with a base frame; a first support part provided on the base frame that supports the user's buttocks and back and moves in response to the user's movements; and a second support part provided on the base frame that elastically supports the first support part and moves in response to the back support body of the first support part when the first support part moves. The interoperability of the triple support parts allows for a wide range of posture changes, and the center of gravity shifts according to the user's posture, maintaining overall balance.

Description

Technical Field

[0001] The present invention relates to a chair. More specifically, it relates to a chair whose position angle can be automatically adjusted so as to operate in response to the movement of a user, from the case where the user is engaged in intensive work to the angle at which the user can lie down and rest.

Background Art

[0002] Generally, office or student chairs are used together with desks for working or studying in companies or homes, and their technical fields are usually different from those of seats provided in automobiles. A seat plate, which is one component of such office chairs, serves to support the buttocks of a user.

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

[0004] Recently, the time people spend sitting on chairs has been increasing. Therefore, when sitting on a chair for a long time, the load on the upper body is concentrated on the sacrum and hip joints, and pain and numbness are induced by the force applied to the hard and rigid seat plate of the chair. As a result, the user may continue to have a poor sitting posture in order to reduce the pain, which may cause excessive stress on the waist or diseases such as scoliosis. Also, when the buttocks are in close contact with the seat plate under pressure, sitting becomes inconvenient, metabolism cannot function smoothly, skin color changes, and keratin is generated, which is not good for health and beauty.

[0005] Conventional chairs cannot move the part that supports the user's back and the part that supports the buttocks in联动, and there are parts that are insufficient in ergonomically supporting the movement of the user, and improvement measures regarding this are required.

[0006] It should be noted that there is an error in the original text where "連動" is used. I translated it as "联动" as it seems to be a misspelling. If it was meant to be "联动" in Chinese, it should be "interlock" in English. You can adjust it according to the correct meaning.However, while curve chairs have been disclosed in the past, they are floor chairs and are limited to use in contact with the floor, such as in a room or on a wooden floor, or placed on top of an existing chair, so there are limitations to their use as general office chairs or desk chairs.

[0007] The aforementioned technical configuration is background technology intended to aid in understanding the present invention and does not represent prior art that is widely known in the technical field to which the present invention pertains. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Special Publication No. 7-083727 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] Therefore, the technical problem that the present invention aims to solve is to provide a chair that moves in response to the user's movements, and whose position angle can be automatically adjusted from an angle where the user can concentrate on work to an angle where they can lie down and rest. [Means for solving the problem]

[0010] According to one aspect of the present invention, a chair can be provided that includes: a chair body having a base frame; a first support part provided on the base frame to support the user's buttocks and back and move in accordance with the user's movements; and a second support part provided on the base frame to support the first support part and move in accordance with the back support body of the first support part when the first support part moves, wherein the second support part supports the rolling movement of the buttock support body of the first support part and elastically supports the back support body of the first support part.

[0011] The first support portion may include: a buttock support body provided to move on the base frame to support the user's buttocks; a back support body provided to connect to the buttock support body to support the user's back and supported by the second support portion; and a rotation guide member rotatably coupled to the back support body and guided by a guide arm provided on the second support portion to guide the rotation of the first support portion.

[0012] The second support portion 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 to guide the movement of the back support body; and a first elastic support portion provided on the base support body to elastically support the back support body.

[0013] The chair body may further include a leg support portion that is provided to move on the base frame to support the user's legs, and may further include a center of gravity shift portion provided on the second support portion to shift the center of gravity of the first support portion.

[0014] Furthermore, according to another aspect of the present invention, a chair can be provided that includes: a chair body comprising a base frame and a base support arm provided on the base frame; a first support part disposed at a distance from the base frame, supporting the user's buttocks and back, and moving in accordance with the user's movements; and a second support part disposed between the base frame and the first support part, supporting the first support part, and moving in accordance with the back support body of the first support part when the first support part moves, wherein when the base support body of the back support body and the second support part tilt backward, the first support part and the second support part move forward.

[0015] The first support portion further includes a base roller rotatably mounted on the base support arm and at least one base support roller rotatably mounted on the base frame to support the connecting plate of the second support portion, and the second support portion may further include a roller member mounted on the base support body and connected to the base roller to prevent the base roller (160) from detaching from the base support body (310).

[0016] The back support body further includes a lumbar rest provided to support the user's back, the lumbar rest moving backward when the back support body tilts backward to prevent interference with the user's back.

[0017] According to one aspect of the present invention, a chair can be provided that includes: a chair body having a base frame; a first support unit disposed on the base frame and supporting the user's buttocks and back; and a second support unit provided on the base frame and supporting the first support unit, wherein when the first support unit tilts backward, the area of ​​the second support unit that supports the user's buttocks moves forward.

[0018] The first support unit may include: a first buttock support portion positioned on top of the base frame and supporting a region of the second support unit that supports the user's buttocks; a first back support portion connected to the first buttock support portion and supporting the user's back; and a first elastic support portion provided on the first back support portion, which, when tilted backward from the first back support portion, is elastically supported by the second support unit in a region corresponding to the first back support portion.

[0019] The second support unit may include: a second seat support portion supported to move on the base frame and to which the first seat support portion is coupled; a second back support portion rotatably coupled to the chair body and connected to the second seat support portion; and a stopper portion provided on the second seat support portion to restrict its movement.

[0020] The second hip support portion includes a second hip support body to which the first hip support body of the first hip support portion is detachably coupled at the upper part; and a second hip support frame coupled so as to move in the front-back direction of the base frame and to which the second hip support body is detachably coupled. The chair body may further include a main body elastic support portion provided on the base frame to elastically support the movement of the second hip support frame.

[0021] The first support unit may further include a lumbar support portion provided on the first back support portion of the first support unit to support the lumbar vertebra of the user.

Advantages of the Invention

[0022] Embodiments of the present invention can provide a chair whose position angle can be automatically adjusted from the case where the user is engaged in intensive work while moving in response to the movement of the user to the angle where the user can lie down and rest.

[0023] Also, the hip support body and the back support body move in response to the movement of the user, and the back and hip regions of the user can be supported more efficiently.

[0024] Furthermore, when the first support portion makes a tilting movement, the second support portion supports the first support portion, and the second support portion is supported by the third support portion, so that the movement can be made stably and the tilting movement can also be made smoothly.

[0025] Also, when the back support body and the base support body tilt backward, it is possible to prevent the chair from tipping over due to the movement of the center of gravity shift by the center of gravity shift portion, the forward movement of the first support portion and the second support portion.

Brief Description of the Drawings

[0026] [Figure 1] It is a side view schematically showing a chair according to an embodiment of the present invention. [Figure 2] It is an exploded side view schematically showing that the first support portion shown in FIG. 1 is separated from the second support portion. [Figure 3]Figure 1 is a schematic diagram illustrating the operation of the lumbar rest, showing how the rotation of the rotating guide member activates the rest movement mechanism, causing the lumbar rest to move backward. [Figure 4] Figure 3 is a magnified view of the lumbar rest area shown in the diagram. [Figure 5] Figure 3 shows another embodiment of the lumbar rest. [Figure 6] Figure 1 is a schematic diagram illustrating how the first and second support parts shown in the diagram are tilted backward. [Figure 7] This is an operational diagram of this embodiment, illustrating schematically the process by which the back support body is supported by the base support body and tilts. [Figure 8] This is a schematic diagram illustrating the center of gravity shifting mechanism in this embodiment. [Figure 9] Figure 8 is an operational diagram of the center of gravity movement mechanism shown in the figure. [Figure 10] Figure 1 is a schematic diagram illustrating the support plate shown. [Figure 11] This is a schematic side view illustrating a chair according to another embodiment of the present invention. [Figure 12] Figure 11 is a schematic diagram illustrating how the rear support body and base support body tilt backward, while the rear support body and connecting plate move forward. [Figure 13] Figure 11 is a magnified view of the area of ​​the base roller shown in the diagram. [Modes for carrying out the invention]

[0027] To fully understand the present invention, its operational advantages, and the objectives to be achieved by implementing the present invention, one should refer to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

[0028] The present invention will be described in detail below by referring to preferred embodiments of the present invention with reference to the attached drawings. The same reference numerals shown in each drawing indicate the same component.

[0029] Figure 1 is a schematic side view illustrating a chair according to one embodiment of the present invention; Figure 2 is a schematic exploded side view illustrating the first support part shown in Figure 1 separated from the second support part; Figure 3 is an operation diagram of the lumbar rest shown in Figure 1, schematically illustrating that the rest movement part is operated by the rotation of the rotation guide member, causing the lumbar rest to move backward; Figure 4 is an enlarged view of the area of ​​the lumbar rest shown in Figure 3; and Figure 6 is another embodiment of the lumbar rest shown in Figure 3.

[0030] Furthermore, Figure 6 is a schematic diagram illustrating how the first and second support parts shown in Figure 1 tilt backward, Figure 7 is an operation diagram of this embodiment, which schematicly illustrates the process by which the back support body is supported by the base support body and tilts, Figure 8 is a schematic diagram illustrating the center of gravity movement part of this embodiment, Figure 9 is an operation diagram of the center of gravity movement part shown in Figure 8, and Figure 10 is an example of a schematic diagram illustrating the support plate shown in Figure 1, etc.

[0031] As shown in these drawings, the chair (1) according to this embodiment comprises a chair body (100) equipped with 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 accordance with the user's movements, a second support part (300) provided on the base frame (110) to elastically support the first support part (200) and move in accordance with 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 shift part (500) provided on the base frame (110) and the second support part (300) to take the center of gravity shift of the first support part (200).

[0032] The chair body (100), as shown in Figure 1, includes a base frame (110), support posts (120) that support the bottom surface of the base frame (110), a plurality of support legs (130) provided on the support posts (120), and a plurality of caster members (140) provided on the plurality of support legs (130).

[0033] The leg support portion provided on the chair body (100) is designed to extend forward from the chair body (100) and can support the user's leg area.

[0034] In this embodiment, the leg support section includes a load-sensing sensor provided on the hip support body (210) or base frame (110) to sense the user's load, and a drive means provided on the base frame (110) to pull the leg support member forward or return it to its original position. In this embodiment, the drive means may include known drive units including cylinders or motors.

[0035] Furthermore, in this embodiment, the leg support can be controlled to operate only when the first support (200) moves in a tilting motion towards the rear of the chair body (100).

[0036] The first support section (200) is provided on the base frame (110) to support the user's buttocks and back, and can be moved in accordance with the user's movements.

[0037] In this embodiment, the first support section (200), as shown in Figure 1, is provided so as to allow the base frame (110) to move and includes a buttock support body (210) that supports the user's buttocks, a back support body (220) provided so as to be connected to the buttock support body (210) that supports the user's back and is supported by the second support section (300), a rotation guide member (230) provided so as to rotate on the back support body (220) that guides the tilting movement of the back support body (220), and a rest movement section (240) provided on the back support body (220) so as to be connected to the rotation guide member (230) that moves the lumbar rest (221) provided on the back support body (220).

[0038] The buttock support body (210) of the first support section (200) supports the user's buttocks and, as shown in Figure 1, includes a support plate (211) and a body hole (212) provided on the side wall of the buttock support body (210) so that the guide roller (321) of the second support section (300) is supported by the side wall of the buttock support body (210).

[0039] In this embodiment, the support plate (211) directly supports the user's buttocks and includes a flat portion (211a) and a bent portion (211b) that is curved outwards from the end of the flat portion (211a) toward the support leg (130), as shown in Figure 10.

[0040] In this embodiment, when the first support portion (200) tilts backward, the flat portion (211a) that supports the user's buttocks is placed on the connecting plate (320), allowing the rotating guide member (230) to smoothly connect to the guide arm (330).

[0041] In this embodiment, the flattened portion (211a) can be provided in a region adjacent to the back support body (220) of the first support portion (200). Furthermore, as shown in Figure 1, a pair of guide rollers (321) can be provided on the side wall of the rear support body (210) in which the body hole (212) is provided in this embodiment. In this embodiment, the pair of guide rollers (321) can support the rear support body (210) when it tilts, thereby stabilizing the tilt of the rear support body (210).

[0042] The back support body (220) of the first support section (200) supports the user's back and can move together with the hip support body (210) when the user moves.

[0043] In this embodiment, the back support body (220) can be provided with a lumbar rest (221) that supports the user's lumbar spine, as shown in Figure 1. In this embodiment, when the back support body (220) tilts backward, the lumbar rest (221) is moved backward by the rest movement part (240), as shown in Figure 7, minimizing discomfort caused by the user's back being pressed against by the lumbar rest (221) when lying down.

[0044] Furthermore, in this embodiment, the lumbar rest (221) can be operated by being directly connected to the rest movement unit (240), as shown in Figure 5. That is, the connecting member (242) that connects the rotating guide member (230) and the pair of support rollers (241) is connected to the lumbar rest (221) rather than the back support body (220), allowing the lumbar rest (221) to be moved in the front-to-back direction.

[0045] The rotating guide member (230) of the first support part (200) is rotatably coupled to the back support body (220), and when the first support part (200) tilts backward, it is supported by the guide arm (330) provided on the second support part (300) and can move together with the back support body (220).

[0046] In this embodiment, the rotating guide member (230) is provided with multiple gear teeth that can mesh with the gear teeth provided on the guide arm (330).

[0047] Furthermore, in this embodiment, the rotating 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).

[0048] The rest movement section (240) of the first support section (200), as shown in Figure 3, includes a pair of support rollers (241), one of which is rotatably coupled to the upper end of the lumbar rest (221), and the other which 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), thereby transmitting the rotational force of the rotation guide member (230) to the lumbar rest (221) and adjusting the degree of protrusion of the lumbar rest (221).

[0049] In this embodiment, the rotational force of the rotating guide member (230) is transmitted to the connecting member (242), which, as shown in Figure 3, connects to the upper end of the lumbar rest (221), allowing the lumbar rest (221) to be moved backward. Therefore, when the user is lying down, the portion of the lumbar rest (221) that protrudes forward from the back support body (220) is almost eliminated, preventing the user's back from being interfered with by the lumbar rest (221), i.e., preventing discomfort caused by being pressed by the lumbar rest (221).

[0050] The second support section (300) is provided on the base frame (110) and elastically supports the first support section (200). When the first support section (200) moves, some of its components can be moved to correspond with the back support body (220) of the first support section (200), as shown in Figure 7.

[0051] In this embodiment, the second support section (300), as shown in Figure 1, includes a base support body (310) that supports the back support body (220) of the first support section (200), a connecting plate (320) whose one side is connected to the base frame (110) and whose other side is connected to the base support body (310), a guide arm (330) provided on the connecting plate (320) that guides the movement of the base support body (310) and the movement of the back support body (220), a first elastic support section (340) provided on the base support body (310) that elastically supports the back support body (220), and a head support section (350) provided on the base support body (310) that supports the user's head.

[0052] The base support body (310) of the second support section (300) can be moved to tilt backward together with the back support body (220), as shown in Figure 6.

[0053] The connecting plate (320) of the second support section (300) can be connected to the base frame (110) on one side, and the other side can be provided such that the base support body (310) tilts backward.

[0054] In this embodiment, the connecting plate (320) is directly connected to the base support body (310), and the base support body (310) is provided to have its own elastic force so that it can be moved to tilt backward, or it can be connected to the back support body (220) using the guide arm (330) as a connecting medium.

[0055] Furthermore, in this embodiment, gear teeth are provided on the bottom surface of the connecting plate (320), as shown in Figure 2, and these gear teeth mesh with the drive gear (530) of the center of gravity shifting part (500). As a result, when the center of gravity shifts and the drive gear (530) is activated, the chair body (100) can move backward, as shown in Figure 9. In this embodiment, the chair body (100) can also be configured to maintain its position while the remaining components move.

[0056] Furthermore, in this embodiment, the connecting plate (320) can be provided with guide rollers (321), as shown in Figures 1 and 2. In this embodiment, the guide rollers (321) are provided to rotate on the side surface of the connecting plate (320) so as to be able to stably and smoothly support the rear support body (210) when the first support part (200) tilts backward or returns to its original position. That is, in this embodiment, the guide rollers (321) are provided so as to contact the area of ​​the rear support body (210) where the body hole (212) is provided, and can support the rear support body (210). In this embodiment, a pair of guide rollers (321) can be provided spaced apart on the side surface of the base frame (110).

[0057] The guide arm (330) of the second support section (300) is provided on the connecting plate (320) and tilts backward from the first support section (200), guiding the movement of the rotating guide member (230) and also guiding the base support body (310) to tilt backward.

[0058] In this embodiment, the guide arms (330) can be provided on both sides of the connecting plate (320), and they can also be provided with gear teeth to mesh with the rotating guide member (230).

[0059] As shown in Figure 3, the first elastic support portion (340) of the second support portion (300) can elastically support the inclined back support body (220) which is provided on the base support body (310). In this embodiment, the first elastic support portion (340), as shown in Figure 3, includes a first support block (341) provided on the base support body (310), a first elastic support base (342) rotatably coupled to the first support block (341), a first support ball (343) provided on the first elastic support base (342) to support the back support body (220), and a first spring member (344) with one side provided on the base support body (310) and the other side connected to the first elastic support base (342) to support the first elastic support base (342).

[0060] In this embodiment, before the back support body (220) tilts backward, the first support ball (343) of the first elastic support part (340) and the back support body (220) are separated from each other, as shown by the dotted line in Figure 7. When the user's load is applied to the back support body (220) in this state, the back support body (220) tilts backward, and as 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. As 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), and both the back support body (220) and the base support body (310) tilt backward, reaching the state shown by the solid line in Figure 7. In that state, the second elastic spring (344) of the second support part (300) is also contracted.

[0061] The head support portion (350) of the second support portion (300) is provided on the upper part of the base support body (310), as shown in Figure 1, and can support the user's head and neck.

[0062] The third support portion (400), as shown in Figure 2, elastically supports the second support portion (300) and includes a support plate (410) connected to a connecting plate (320), and a second elastic support portion (420) whose one side is connected to the support plate (410) and whose other side is connected to the base support body (310), thereby elastically supporting the base support body (310).

[0063] In this embodiment, the second elastic support portion (420), as shown in Figure 1, includes a second support block (421) provided on the support plate (211), a second elastic support base (422) rotatably coupled to the second support block (421), a second support ball (423) provided on the second elastic support base (422) to support the back support body (220), and a second elastic spring (424) with one side provided on the base support body and the other side connected to the second elastic support base (422) to support the second elastic support base (422).

[0064] The center of gravity shifting part (500) can adjust the center of gravity of the chair to match the shifted center of gravity when the user lies down or otherwise moves the chair's center of gravity.

[0065] In this embodiment, the center of gravity shifting part (500), as shown in Figure 8, includes a first pressure sensor (510) provided on the connecting plate (320) for sensing the pressure applied to the connecting plate (320), a second pressure sensor (520) provided on the connecting plate (320) at a distance from the first pressure sensor (510) for sensing the pressure applied to the connecting plate (320), and a drive gear (530) provided on the base frame (110) so as to rotate and meshing with the teeth of a gear provided on the bottom surface of the connecting plate (320) to move the second support part (300).

[0066] In this embodiment, the first pressure sensor (510) is positioned between one guide roller (321) and a guide arm (330), as shown in Figure 8, and the second pressure sensor (520) can be positioned between a pair of guide rollers (321).

[0067] In this embodiment, the drive gear (530) can be rotated by being connected to a drive means, such as a drive motor, provided on the base frame (110).

[0068] Figure 9 illustrates that the chair body (100) moves, but it is not limited to this; the second support part (300) can also be configured to move.

[0069] Figure 11 is a schematic side view illustrating a chair according to another embodiment of the present invention; Figure 12 is a schematic diagram illustrating that the back support body and base support body shown in Figure 11 are tilted backward, and the seat support body and connecting plate have moved forward; and Figure 13 is an enlarged view of the area of ​​the base roller shown in Figure 11.

[0070] The chair (1a) according to this embodiment differs from the previously described embodiment in that, as shown in Figure 11, it simplifies the structure and ensures safety by shifting the center of gravity using a mechanical mechanism when it tilts.

[0071] As shown in Figure 11, the chair body (100a) has a base support arm (150) that protrudes upward from the rear end of the base frame (110a), and a base roller (160) is connected to the upper part of the base support arm (150) so that it can rotate.

[0072] In this embodiment, the structure in which the base roller (160) and the roller member (360) are connected at the connecting part provides a detachment prevention function so that the base support body (310) does not detach when the base support body (310) tilts. In addition, the tilt of the base support body (310) is naturally created by the friction caused by the rolling of the base support body (310) and the base roller (160).

[0073] In this embodiment, as shown in Figure 12, a plurality of base support rollers (170) are provided spaced apart on the upper surface of the base frame (110) to guide the movement of the connecting plate (320) in the front-rear direction.

[0074] As described above, a roller member (360) can be provided on the base support body (310) of the second support section (300) (300a).

[0075] The lumbar rest (221) in this embodiment and the previously described embodiment can be positioned so that it is mostly located behind the back support body (220), as shown in Figure 14.

[0076] Figure 14 is a schematic perspective view illustrating a chair according to one embodiment of the present invention, Figure 15 is a rear perspective view of Figure 1, Figure 16 is a right side view of Figure 1, Figure 17 is a rear view of Figure 1, Figure 18 is a perspective view illustrating the main part of Figure 1, and Figure 19 is a left side view of Figure 18.

[0077] Furthermore, Figure 20 is a perspective view illustrating the first support unit and lumbar support shown in Figure 18, Figure 21 is a front view of Figure 20, Figure 22 is a perspective view showing an enlarged view of the first elastic support shown in Figure 20, Figure 23 is a perspective view illustrating the second support unit shown in Figure 18, Figure 24 is a right side view of Figure 23, and Figure 25 is an exploded perspective view of the stopper shown in Figure 23.

[0078] Furthermore, Figure 26 is a perspective view showing the configuration excluding the second rear support body shown in Figure 23, Figure 27 is a plan view of Figure 26, Figure 28 is a perspective view showing the configuration excluding the second and third levers shown in Figure 26, Figure 29 is an exploded perspective view showing the second rear support frame shown in Figure 28 separated from the base frame, Figure 30 is a usage diagram of this embodiment, a perspective view showing the user seated in the chair, and Figure 31 is a perspective view showing the user shown in Figure 30 lying backward.

[0079] As shown in these drawings, the chair (1b) according to this embodiment includes a chair body (1000) equipped with a base frame (1100), a first support unit (2000) positioned on the base frame (1100) to support the user's buttocks and back, a second support unit (3000) provided on the base frame (1100) to support the first support unit (2000), a lumbar support part (4000) provided on the first back support part (2200) of the first support unit (2000) to support the user's lumbar spine, and a lever part (5000) provided on the chair body (1000) and the second support unit (3000).

[0080] The chair body (1000), as shown in Figure 15, comprises a base frame (1100), a support post (1200) that supports the bottom surface of the base frame (1100), a plurality of support legs (1300) provided on the support post (1200), a plurality of caster members (1400) provided on the plurality of support legs (1300), a base support arm (1500) provided at the rear of the base frame (1100) that connects the second back support frame (3210) of the second support unit (3000) and the lumbar spine connecting link (4300) of the lumbar spine support part (4000), and the base frame (11 The assembly includes a main body elastic support section (1600) provided on the second support unit (3000) to elastically support the movement of the second buttock support frame (3120), a bent frame (1700) provided on the upper part of the base frame (1100), a plurality of main body support rollers (1800) connected to the bent frame (1700) to support the side walls of the second buttock support frame (3120), and a leg support section (1900) connected to the front of the base frame (1100) which rises up when the second buttock support frame (3120) moves forward to support the user's feet.

[0081] In this embodiment, the main elastic support portion (1600) guides the second butt support frame (3120) to move in the longitudinal direction of the base frame, and as shown in Figure 15, includes a main elastic support body (1610) provided on the base frame (1100), a main elastic support shaft (1620) with one end connected to the main elastic support body (1610), and a main spring (1630) connected to the main elastic support shaft (1620).

[0082] The first support unit (2000) directly supports the user's back and buttocks area and is positioned on top of the base frame (1100). It includes a first buttock support (2100) that supports the area of ​​the second support unit (3000) that supports the user's buttocks, a first back support (2200) that is connected to the first buttock support (2100) and supports the user's back, and a first elastic support (2300) that is provided on the first back support (2200) and, when tilted backward from the first back support (2200), is elastically supported by the second support unit (3000) in the area corresponding to the first back support (2200).

[0083] The first buttock support section (2100) of the first support unit (2000) directly supports the user's buttocks, as shown in Figure 20, and comprises a first buttock support body (2110), a first support arm (2120) provided behind the first buttock support body (2110), a lumbar support shaft (2130) provided on the first buttock support body (2110) in the area where the first support arm (2120) is provided to support the lumbar support section (4000), and the first buttock support body (2 The assembly includes a detachment prevention body (2140) provided on the side wall of 110) and supported by a stopper roller (3350) of the stopper portion (3300), a detachment prevention cover (2150) that is detachably connected to the detachment prevention body (2140) and closes one side of a prevention hole (2141) provided in the detachment prevention body (2140), and a first spring (2160) that is connected to the lumbar support shaft (2130) and elastically supports the first back support frame (2210).

[0084] In this embodiment, the bottom surface of the first rear support body (2110) can be supported on the upper part of the second rear support body (3110) shown in Figure 23, and can be supported by engaging with the stopper roller (3350) of the stopper part (3300), thereby preventing it from coming off.

[0085] The first back support portion (2200) of the first support unit (2000) can be connected to the lumbar support axis (2130) so as to rotate, as shown in Figure 20.

[0086] In this embodiment, the first back support section (2200) includes a first back support frame (2210) that is rotatably coupled to the lumbar spine support axis (2130), as shown in Figure 20, and a first back support body (2220) that is coupled to the first back support frame (2210).

[0087] In this embodiment, the first back support frame (2210) can be provided with a first lumbar vertebral projection hole, as shown in Figure 22.

[0088] In this embodiment, the first back support body (2220) can be provided with a second lumbar vertebral projection hole, as shown in Figure 1. In this embodiment, the first lumbar vertebral projection hole (2211) and the second lumbar vertebral projection hole (2221) are provided so as to allow the lumbar rest (4100) of the lumbar support part (4000) to move in the front-rear direction of the first back support body, and can be provided so as to communicate with each other.

[0089] As shown in Figure 22, the first elastic support portion (2300) of the first support unit (2000) is coupled to the rear of the first back support frame (2210), so that when the first back support frame (2210) tilts backward, the first back support body (2220) is smoothly supported by the second back support body.

[0090] In this embodiment, the first elastic support portion (2300), as shown in Figure 22, includes a first elastic support shaft (2310) coupled to the rear of the upper end 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) with one side coupled to the first elastic support shaft (2310) and the other side supporting the inside of the first elastic support body (2320), and a first elastic support roller (2340) provided at the lower end of the first elastic support body (2320).

[0091] In this embodiment, when the first back support portion (2200) tilts toward the second back support portion (3200) and contacts 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 Figure 22 is connected moves closer to the first back support frame (2210), thereby elastically supporting the first back support portion (2200).

[0092] The second support unit (3000) is provided on the base frame (1100) to support the first support part, and when the first back support part (2200) tilts backward, it moves forward, so that the center of weight transfer moves forward, thereby preventing the risk of the chair body (1000) tipping over.

[0093] In this embodiment, the second support unit (3000), as shown in Figure 26, includes a second buttock support (3100) which is supported to move on the base frame (1100) and to which the first buttock support (2100) is connected; a second back support (3200) which is connected to the chair body (1000) so as to rotate and is linked to the second buttock support (3100); and a stopper (3300) provided on the second buttock support (3100) which restricts the movement of the second buttock support (3100).

[0094] The second rear support portion (3100) of the second support unit (3000) includes, as shown in Figure 25, a second rear support body (3110) and a second rear support frame (3120) which is detachably connected to the lower part of the rear support body and is connected to the base frame (1100) so as to move in the front-rear direction.

[0095] In this embodiment, as shown in Figure 25, a receiving groove (3111) is provided on each side wall of the second rear support body (3110), and a stopper portion (3300) can be attached to and detached from the receiving groove (3111).

[0096] In this embodiment, a plurality of first connecting pieces (3121) can be provided spaced apart on the upper part of the second butt support frame (3120), as shown in Figure 26. In this embodiment, the plurality of first connecting pieces (3121) can be attached to and detached from the bottom surface of the second butt support body (3110) using screws or bolts.

[0097] In this embodiment, the second tail support frame (3120) can be provided with a movable guide hole (3122), as shown in Figure 29. In this embodiment, the movable guide hole (3122) can be provided in the longitudinal direction of the second tail support frame (3120), and a pair can be spaced apart. In this embodiment, the main body elastic support portion (1600) can be exposed above the movable guide hole (3122), as shown in Figure 28.

[0098] In this embodiment, a pair of second connecting pieces (3123) can be provided spaced apart behind the second tail support frame (3120), as shown in Figure 29. In this embodiment, the rear end of the main elastic support shaft (1620) can be supported by the second connecting piece (3123), as shown in Figure 26. In this embodiment, when the second tail support frame (3120) moves forward with respect to Figure 26, the main elastic support shaft (1620) can be exposed behind the second connecting piece (3123) for a distance equal to the movement of the second tail support frame (3120).

[0099] As shown in Figure 16, the second back support portion (3200) of the second support unit (3000) is coupled on one side to the base support arm (1500) so as to rotate, and on the other side to the second rear support frame (3120) so as to rotate, providing the power to move the second rear support frame (3120) forward when the first back support portion (2200) tilts backward.

[0100] In this embodiment, the second back support section (3200) includes a second back support frame (3210) whose lower part is rotatably connected to the base support arm (1500), as shown in Figure 26, and a head support base (3220) provided at the upper end of the second back support frame (3210).

[0101] In this embodiment, the lower end of the second back support frame (3210) is provided with a frame connecting link (3211) that rotates to connect with the second hip support frame (3120), as shown in Figure 28. In this embodiment, the second back support frame (3210) is provided with a first hole (3212) and a second hole (3213), as shown in Figure 28. The lumbar connecting link (4300) of the lumbar support section (4000) can be retracted into the first hole (3212), and the lumbar cover (4200) of the lumbar support section (4000) can be retracted into the second hole (3213). The lumbar cover (4200) retracted into the second hole (3213) can then protrude to the rear of the second back support frame (3210), as shown in Figure 31.

[0102] Furthermore, in this embodiment, a sliding guide hole (3214) can be provided at the lower part of the second back support frame (3210), as shown in Figure 28, so that the lower part of the second back support frame (3210) can slide with the base support arm (1500) as the reference axis.

[0103] As shown in Figure 25, the stopper portion (3300) of the second support unit (3000) is provided on the second tail support body (3110) and is supported by engaging with the prevention hole (2141) of the detachment prevention body (2140), thereby preventing the second tail support body (3110) from detaching.

[0104] In this embodiment, the stopper portion (3300), as shown in Figure 25, includes a stopper body (3310) that is detachably connected to a housing groove (3111) of the second tail support body (3110) using screws or bolts, a stopper shaft (3320) whose both ends are connected to the inner wall of the stopper body (3310), a stopper spring (3330) that is connected to the stopper shaft (3320) so as to expand and contract and to relax, a movable block (3340) that is connected to the stopper shaft (3320) so as to move and is elastically supported by the stopper spring (3330), and a stopper roller (3350) that is connected to the movable block (3340) so as to rotate and is supported by engaging with a prevention hole (2141) of the detachment prevention body (2140).

[0105] In this embodiment, the movable blocks (3340) are arranged in pairs at a distance from each other, as shown in Figure 25, and the pair of movable blocks (3340) can be elastically supported by a stopper spring (3330).

[0106] As shown in Figure 20, the lumbar support section (4000) is provided on the first back support section (2200) to support the user's lumbar spine.

[0107] In this embodiment, the lumbar support section (4000) includes, as shown in Figure 1, a plurality of lumbar rests (4100) provided to protrude forward from the first back support body (2220); a lumbar cover (4200) positioned behind the first back support frame (2210) to support the plurality of lumbar rests (4100) so as not to detach, and which, when tilted backward from the first back support frame (2210), protrudes behind the second back support frame (3210) as shown in Figure 31; and a lumbar connecting link (4300) provided at the lower part of the lumbar cover (4200) as shown in Figure 20, which is rotatably coupled to the first support arm (2120).

[0108] In this embodiment, the lumbar spine connecting link (4300) is provided with a link hole (4310), as shown in Figure 20, and the lumbar spine connecting link (4300) can be connected to the first support arm through the link hole (4310). In addition, in this embodiment, the link hole (4310) is provided in a curved shape to guide the lumbar spine connecting link (4300) to rotate in a semi-elliptical direction.

[0109] The lever section (5000) includes a first lever (5100) provided on the first tail support section (2100), as shown in Figure 2, and a second lever (5200) and a third lever (5300) provided on the second tail support section (3100), as shown in Figure 27. [Industrial applicability]

[0110] The embodiments of the present invention provide a chair that automatically adjusts its position angle to accommodate the user's movements, ranging from an angle suitable for focused work to an angle where the user can lie down and rest. [Explanation of Symbols]

[0111] 1, 1a, 1b: Chairs 100, 100a: Chair body 110, 110a: Base frame 111: Flat part 112: Bending section 120: Support Post 130: Support leg 140: Caster components 150: Base support arm 160: Base Roller 170: Base support roller 200, 200a: 1st support part 210: Buttock support body 211: Support plate 211a: Flat part 211b: Bent part 212: Body Hole 220: Back support body 221: Lumbar rest 230: Rotating guide member 240: Rest movement section 241: Support roller 242: Connecting member 300:Second support part 310: Base support body 320: Connecting plate 321: Guide Roller 330: Guide Arm 340: First elastic support section 341: First support block 342: First Elastic Support Base 343: First support ball 344: First elastic spring 350: Head support section 360: Roller component 400: Third support part 410: Support plate 420: Second elastic support section 421: Second support block 422: Second Elastic Support Base 423: Second support ball 424: Second elastic spring 500: Center of gravity 510: First pressure sensor 520: Second pressure sensor 530: Drive gear 1000: Chair body 1100: Base frame 1200: Support Post 1300: Support leg 1400: Caster components 1500: Base support arm 1600: Main body elastic support section 1610: Main body elastic support body 1620: Main body elastic support shaft 1630: Main spring 1700: Folding frame 1800: Main support roller 1900: Leg support 2000: First support unit 2100: First butt support section 2110: First buttock support body 2120: First support arm 2130: Lumbar support axis 2140: Detachment prevention body 2141: Prevention Hole 2150: Anti-detachment cover 2160: First Spring 2200: 1st back support part 2210: First back support frame 2211: First lumbar vertebral protrusion hall 2220: First back support body 2221: Second lumbar vertebral protrusion hall 2300: First elastic support section 2310: First elastic support shaft 2320: First Elastic Support Body 2330: First elastic spring 2340: First elastic support roller 3000: Second support unit 3100: Second rear support section 3110: Second rear support body 3111: Storage groove 3120: Second rear support frame 3121: 1st joint piece 3122: Mobile Guide Hall 3123:Second joining piece 3200:Second back support part 3210: Second back support frame 3211: Frame linking link 3212: Hall 1 3213: Hall 2 3214: Sliding Guide Hole 3220: Head support 3300: Stopper part 3310: Stopper body 3320: Stopper shaft 3330: Stopper Spring 3340: Moving Block 3350: Stopper Roller 4000: Lumbar support part 4100: Lumbar rest 4200: Lumbar support 4300: Lumbar vertebral linkage 4310: Link Hole 5000: Lever part 5100: First lever 5200: Second lever 5300: Third lever

Claims

1. A chair body with a base frame; A first support portion provided on the base frame to support the user's buttocks and back, and to move in response to the user's movements; and The base frame includes a second support portion which is provided on the base frame and supports the first support portion, and which moves in correspondence with the back support body of the first support portion when the first support portion moves, The second support portion supports the rolling motion of the rear support body of the first support portion and elastically supports the back support body of the first support portion. chair.

2. The first support portion is, The buttock support body is provided on the base frame so as to be movable and to support the user's buttocks; A back support body provided to be connected to the buttock support body and to support the user's back, and the back support body supported by the second support portion; and It includes a rotating guide member that is rotatably coupled to the back support body and guided by a guide arm provided on the second support portion to guide the rotation of the first support portion. The chair according to claim 1.

3. The second support portion is, A base support body that supports the aforementioned back support body; One side is connected to the base frame, and the other side is a connecting plate that connects to the base support body; A guide arm provided on the connecting plate to guide the movement of the back support body; and Includes a first elastic support portion provided on the base support body to elastically support the back support body. The chair according to claim 1.

4. The chair body is, The base frame is further provided to move and to support the user's legs, The second support portion further includes a center of gravity shifting portion that is provided on the first support portion to shift the center of gravity of the first support portion. The chair according to claim 1.

5. A chair body comprising a base frame and a base support arm provided on the base frame; A first support part, positioned at a distance from the base frame, supports the user's buttocks and back, and moves in response to the user's movements; and It includes a second support portion disposed between the base frame and the first support portion, which supports the first support portion and moves in correspondence with the back support body of the first support portion when the first support portion moves, When the rear support body and the base support body of the second support part tilt backward, the first support part and the second support part move forward. chair.

6. The chair body is, A base roller that is rotatably mounted on the base support arm; and The base frame further includes at least one base support roller that is rotatably mounted on the base frame and supports the connecting plate of the second support, The second support portion is, The base support body further includes a roller member provided on the base support body and connected to the base roller to prevent the base roller from detaching from the base support body. The chair according to claim 5.

7. The back support body further includes a lumbar rest provided to support the user's back, The lumbar rest moves backward when the back support body tilts backward, preventing interference with the user's back. The chair according to claim 1 or claim 5.

8. A chair body with a base frame; A first support unit positioned on the base frame to support the user's buttocks and back; and Includes a second support unit provided on the base frame and supporting the first support portion, When the first support unit tilts backward, the area of ​​the second support unit that supports the user's buttocks moves forward. chair.

9. The first support unit is, A first buttock support portion is positioned on the upper part of the base frame and supports the area of ​​the second support unit that supports the user's buttocks; A first back support portion provided to be connected to the first buttock support portion and to support the user's back; and It includes a first elastic support portion provided on the first back support portion, which, when tilted rearward from the first back support portion, is elastically supported by the second support unit in a region corresponding to the first back support portion. The chair according to claim 8.

10. The second support unit is, A second rear support portion is supported to move along the base frame and to which the first rear support portion is coupled; A second back support portion that is rotatably coupled to the chair body and connected to the second seat support portion; and Includes a stopper portion provided on the second tail support portion to restrict the movement of the second tail support portion. The chair according to claim 9.

11. The second rear support portion is, A second rear support body to which the first rear support body of the first rear support portion is detachably attached to the upper part; and The second rear support frame is connected to the base frame so as to move in the front-rear direction, and the second rear support body is detachably connected to it. The chair body is, The base frame further includes a main body elastic support portion that is provided on the base frame and elastically supports the movement of the second rear support frame. The chair according to claim 10.

12. The first support unit further includes a lumbar support portion provided on the first back support portion to support the user's lumbar spine. The chair according to claim 8.

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