Chair

Abstract

The present invention relates to a chair, and more specifically, to a chair in which, when a user rotates the backrest portion backward, the seat member constituting the seat portion also moves forward in correspondence to prevent slipping between the backrest portion and the seat member constituting the seat portion, thereby allowing for comfortable use, and also allows for use tailored to the user's condition by fixing the angle between the seat member constituting the seat portion and the backrest portion in an adjusted state. To achieve the above objective, the present invention comprises a leg portion supported on the floor, a seat portion installed on the upper part of the leg portion, and a backrest portion installed on the rear part of the seat portion, and is characterized by the seat portion moving back and forth as the backrest portion is tilted.

Description

Technology Field

[0001] The present invention relates to a chair, and more specifically, to a chair in which, when a user rotates the backrest portion backward, the seat member constituting the seat portion also moves forward in correspondence to prevent slipping between the backrest portion and the seat member constituting the seat portion, thereby allowing for comfortable use, and furthermore, the angle between the seat member constituting the seat portion and the backrest portion is fixed in an adjusted state so as to allow for use according to the user's condition. Background Technology

[0002] Generally, the chair has a structure in which a backrest and a seat are joined at a predetermined angle, and legs are joined to the lower side of the seat; the seat and backrest are covered by an outer shell containing a cushioning material such as sponge.

[0003] Working for a long time in a fixed position while sitting in a chair blocks the supply of blood and nutrients to the intervertebral cartilage, causing it to stiffen over time. In particular, a spine in poor posture fails to form a normal spinal line and instead forms a 'backward curve,' or kyphosis. If kyphosis persists, the intervertebral cartilage compresses the spinal nerves, causing pain.

[0004] Therefore, it is necessary for a user sitting in a chair to frequently lean back and induce appropriate movement in the spine to relieve tension in the intervertebral cartilage and surrounding muscles and to supply blood and nutrients, and a chair having a tilting function that tilts in response to such movement is disclosed.

[0005] A chair with a conventional tilting device is structured such that, as illustrated in FIG. 1, a seat (2) is secured and fixed to a seat member (4), the seat member (4) is connected to a tilt (8) by a hinge shaft (6), the tilt (8) is connected to a leg (10), a backrest connector (14) connected to a backrest (12) is coupled to the tilt (8), a lever (16) for adjusting the tilted angle of the backrest is coupled, and an armrest (18) for supporting the user's arm is coupled to the middle part of the seat (2).

[0006] However, in a conventional tiltable chair, when tilting from the state of Fig. 2 (a) to the state of Fig. 2 (b), the center of rotation of the human body (R1: pelvic area) and the center of rotation of the chair (R2) are different, so there is a difference between the movement of the chair and the movement of the human body. That is, since the point (M) marked on the human body and the point (C) marked on the chair differ by a distance (L) after tilting, there was a problem that slipping occurred between the human body and the backrest of the chair during tilting, causing discomfort.

[0007] Therefore, in order to solve these problems, the technology described in Korean Registered Patent No. 10-0903215, as illustrated in FIG. 3, has been proposed. The technical feature thereof is that in a tiltable chair in which a seat body (110) and a backrest body (120) are coupled to a tilt mechanism to enable tilting, the backrest body (120) is composed of a backrest frame (122) and a backrest (124) coupled to the backrest frame (122) so as to be movable in the up-and-down direction by a moving means (150); the front side of the seat body (110) is coupled to one side of the tilt mechanism (130), the backrest frame (122) is coupled to the other side of the tilt mechanism (130), the rear side of the seat body (110) is coupled to the backrest body (120), and the moving means (150) is such that the lower side of the backrest (124) is the backrest The lower connecting part (152) connected to the frame (122) and the upper connecting part (154) connected to the upper side of the back plate (124) are connected to the back plate frame (122), wherein the lower connecting part (152) is linked by a plurality of links, and the lower connecting part (152) linked by the plurality of links is linked by first, second, third, and fourth links, wherein one end of the first link is hinged to the seat plate body while the other end of the first link is hinged to one end of the second link, the middle part of the second link is hinged to the back plate frame while the other end of the second link is hinged to one end of the third link, the other end of the third link is hinged to one end of the fourth link and the back plate (124), and the other end of the fourth link is hinged to the back plate frame (122).

[0008] However, the technology described in Korean Registered Patent No. 10-0903215 allows the seat body (110) to move in conjunction with the backrest body (120) when tilted, thereby enabling the user to use the chair comfortably, but there is a problem in that the structure is complex and the manufacturing cost is high.

[0009] In addition, although the technology described in Korean Registered Patent No. 10-0903215 prevents slipping between the human body and the backrest (124) of the chair, when the backrest tilts backward, it is natural for the user's lower body to move forward, whereas the technology described in Korean Registered Patent No. 10-0903215 has the problem that the lower body slips more because the seat plate moves backward instead. Prior art literature

[0010] Korean Registered Patent No. 10-0903215 (Registered on June 9, 2009) The problem to be solved

[0011] The present invention has been devised to solve the aforementioned problems, and the objective of the present invention is to provide a chair that can be used comfortably by forming a simple overall structure of the chair while ensuring that the backrest and the seat are interconnected, so that when the user rotates the backrest backward, the seat member constituting the seat also moves forward in correspondence to prevent slipping between the backrest and the seat member constituting the seat.

[0012] In addition, another objective of the present invention is to provide a chair that can be used according to the user's condition by providing a fixing device on one side of the chair so that the angle between the seat portion and the backrest portion constituting the chair is adjusted and fixed. means of solving the problem

[0013] The present invention for solving these problems is as follows:

[0014] It comprises a leg portion supported on the floor, a seat portion installed on the upper part of the leg portion, and a backrest portion installed on the rear part of the seat portion, and is characterized in that a seat member constituting the seat portion moves back and forth as the backrest portion is tilted.

[0015] Here, the seat portion is characterized by comprising a base member installed on the upper part of the leg portion, a seat member installed on the upper part of the base member so as to be slidable back and forth, and support brackets installed on both sides of the base member.

[0016] In addition, the backrest is characterized by comprising a backrest member that supports the user's back, and connecting brackets installed on both lower sides of the backrest member and rotatably installed on the upper end of the support bracket.

[0017] At this time, a first link member is formed to protrude downward from the lower rear end of the seat member, and a second link member is installed on the upper surface of a lower plate installed to connect the lower part of the connecting bracket to correspond to the first link member, a link bar is installed to penetrate the first link member and the second link member from left to right, and a link hole in the shape of an elongated hole into which the link bar is inserted is formed in the second link member.

[0018] Meanwhile, a guide portion is formed at the lower part of the seat plate member, and a guide groove into which the base member is inserted is formed at the center of the guide portion.

[0019] In addition, the second link member is further characterized by being provided with a fixing device that restricts the movement of the link bar.

[0020] Here, the fixing device comprises a fixing body fixed to the side of the second link member, a U-shaped stopper installed to protrude forward along a moving groove formed on the inner side of the fixing body, and a spring that elastically supports the stopper in the direction of the link bar, wherein the link bar is positioned and supported at the upper, lower, and inner sides of the stopper, respectively.

[0021] At this time, one end of an operating wire is connected to one side of the stopper member, and the other end of the operating wire is connected to an operating lever installed on one side of the seat plate, and the stopper member is moved backward by pulling the operating wire by the operating lever.

[0022] Meanwhile, on one side of the base member, an uneven surface is formed along the front-rear direction, and a stop guide groove is formed on the inner side of the guide groove. A stop protrusion is installed in the stop guide groove to protrude and is inserted into the uneven surface to fix the movement of the seat member, and a spring is provided on the inner side of the stop guide groove to elastically support the stop protrusion in the direction of the uneven surface. Effects of the invention

[0023] According to the present invention with the above-described configuration, the overall structure of the chair is formed simply, and the backrest and the seat portion are linked together. When the user rotates the backrest portion backward, the seat member constituting the seat portion also moves forward in correspondence, thereby preventing slippage between the backrest portion and the seat member constituting the seat portion, and thus providing the effect of being able to use the chair in a comfortable state.

[0024] In addition, the present invention has the effect of allowing the chair to be used according to the user's condition by providing a fixing device on one side of the chair so that the angle between the seat portion and the backrest portion constituting the chair is adjusted and fixed. Brief explanation of the drawing

[0025] Figure 1 is a side view conceptual diagram of a conventional tilting chair. Figure 2 is a side conceptual diagram showing the tilting state of a conventional tilting chair. Figure 3 is a side view conceptual diagram of a conventional synchronized chair. FIG. 4 is a perspective view of a chair according to the present invention. FIG. 5 is an exploded perspective view of a chair according to the present invention. FIG. 6 is a cross-sectional view of a chair according to the present invention. FIG. 7 is a conceptual diagram showing the tilting state of a chair according to the present invention. FIG. 8 is a conceptual diagram of a chair with a fixing device installed according to another embodiment of the present invention. FIG. 9 is a conceptual diagram showing the operating state of a fixing device for a chair according to the present invention. FIG. 10 is a conceptual bottom view of a state in which a device for fixing the position of a chair seat according to another embodiment of the present invention is installed. Specific details for implementing the invention

[0026] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. Identical components in the drawings are denoted by the same reference numerals, and redundant descriptions of identical components are omitted. Furthermore, it should be understood that the present invention can be implemented in a number of different forms and is not limited to the described embodiments.

[0027] FIG. 4 is a perspective view of a chair according to the present invention, FIG. 5 is an exploded perspective view of a chair according to the present invention, FIG. 6 is a cross-sectional view of a chair according to the present invention, FIG. 7 is a conceptual diagram showing the tilting state of a chair according to the present invention, FIG. 8 is a conceptual diagram showing a state in which a fixing device is installed on a chair according to another embodiment of the present invention, FIG. 9 is a conceptual diagram showing the operating state of the fixing device of a chair according to the present invention, and FIG. 10 is a bottom conceptual diagram showing a state in which a device for fixing the position of the seat plate of a chair according to yet another embodiment of the present invention is installed.

[0028] The present invention relates to a chair (200), and as shown in FIGS. 4 to 7, its configuration comprises a leg portion (210) supported on the floor, a seat portion (300) installed on the upper part of the leg portion (210), and a backrest portion (400) installed on the rear part of the seat portion (300).

[0029] Here, armrest portions (220) may be further provided on both sides of the chair (200), and when the user tilts the backrest portion (400) back and forth while seated on the chair (200), the seat member (320) constituting the seat portion (300) moves back and forth in conjunction with it.

[0030] Therefore, when the user rotates the backrest (400) backward, the seat member (320) constituting the seat portion (300) also moves forward in correspondence, thereby preventing slippage between the user's back and the backrest (400), the leg portion and the seat member (320) constituting the seat portion (300), allowing for comfortable use.

[0031] And, the seat portion (300) comprises a base member (310) installed on the upper part of the leg portion (210) and a seat member (320) installed on the upper part of the base member (310) so as to be able to slide back and forth.

[0032] Here, the leg portion (210) is formed to allow for vertical height adjustment, and the base member (310) installed on the upper part of the leg portion (210) is formed in a plate shape to stably support the seat member (320) located on the upper part.

[0033] At this time, support brackets (312) are further installed on both sides of the base member (310), and one side of the backrest member (400) is installed on the upper part of the support bracket (312) so that it can rotate, thereby allowing the user to easily tilt the backrest member (400).

[0034] Meanwhile, a guide portion (321) is formed to protrude downward from the lower part of the seat member (320) constituting the seat portion (300), and a guide groove (322) into which the base member (310) is inserted is formed in the center of the guide portion (321).

[0035] Here, the guide groove (322) is formed so that the rear is open, and the base member (310) is inserted into the inner side of the guide groove (322), so that when the seat member (320) moves back and forth, the seat member (320) is prevented from detaching from the upper part of the base member (310) by the guide part (321).

[0036] At this time, an LM guide and an LM block may be further provided between the seat member (320) and the base member (310), which reduces the frictional force between the seat member (320) and the base member (310) so that they can move easily, and also prevents them from being arbitrarily separated by the LM guide and LM block even if an external force is applied for various reasons.

[0037] Additionally, a spring (314) may be further provided between the inner front end of the guide groove (322) and the front end of the base member (310). When the user tilts the backrest (400) backward, the seat member (320) moves forward, and when the user does not press the backrest (400), the seat member (320) moves backward due to the restoring force of the spring (314), and accordingly, the backrest (400) also returns to its original position.

[0038] And, the backrest member (400) comprises a backrest member (410) that supports the user's back and connecting brackets (420) installed on both lower sides of the backrest member (410), wherein the connecting brackets (420) are installed so as to be rotatable on the upper end of the support bracket (312).

[0039] Here, a first link member (324) is formed to protrude downward at the lower rear end of the seat member (320), and a bottom plate (422) is installed to connect the lower part of the connecting bracket (420), and a second link member (424) is installed on the upper surface of the bottom plate (422) to correspond to the first link member (324).

[0040] At this time, a link bar (325) is installed to penetrate the first link member (324) and the second link member (424), which are positioned so as to be in contact with each other on the sides, from left to right. The link bar (325) is fixed to the first link member (324), and a link hole (425) in the shape of an elongated hole is formed in the second link member (424) into which the link bar (325) is inserted and which can move up and down.

[0041] Therefore, the backrest member (410) and the seat member (320) are connected by the link bar (325) and the link ball (425) of the first and second link members (324, 424), so that when the user tilts the backrest member (410) backward as described above, the seat member (320) moves forward by the first and second link members (324, 424).

[0042] Additionally, the upper part of the connecting bracket (420) constituting the backrest (400) is installed to be rotatable by a rotation axis (not shown) on the upper part of the support bracket (312), and when the backrest (400) is tilted, the link ball (425) changes not only in the front-rear direction but also in the vertical height because it rotates around the rotation axis.

[0043] Accordingly, as shown in FIG. 7, by forming the link hole (425) in an elongated shape, the link bar (325) can move up and down inside the link hole (425) even when the user tilts the backrest (400), so that the seat member (320) can move back and forth stably.

[0044] Meanwhile, as another embodiment of the present invention, as shown in FIGS. 8 and 9, a fixing device (500) may be further installed on one side of the second link member (424), and the fixing device (500) may restrict the movement of the link bar (325) to prevent the backrest (400) from tilting arbitrarily.

[0045] Here, the fixing device (500) comprises a fixing body (510) fixed to the side of the second link member (424) and a stopping member (520) installed to protrude forward along a moving groove (512) formed on the inner side of the fixing body (510).

[0046] At this time, the stopper member (520) is formed in a U-shape with the front open, and a spring (not shown) is further provided on the inside of the fixed body (510) to elastically support the stopper member (520) in the direction of the link bar (325).

[0047] Thus, by the spring (not shown), the end of the stopper member (520) is protruded forward of the fixed body (510), thereby supporting the upper or lower part of the link bar (325) protruding outward from the link hole (425), thereby preventing the link bar (325) from moving up and down.

[0048] Therefore, if the link bar (325) cannot move up and down, the connecting bracket (420) cannot rotate, and thus the backrest (400) cannot be tilted, and accordingly, the seat plate (300) cannot move back and forth.

[0049] Additionally, a stopper (514) may be further provided at the end of the moving groove (512) formed on the inner side of the fixed body (510), and the stopper (514) is positioned on the inner side formed in a U-shape of the stopping member (520) to prevent the stopping member (520) from protruding excessively forward or coming out of the moving groove (512).

[0050] Here, the stopper (520) is formed in a U-shape with an open front as described above, so that the link bar (325) may be located at the upper or lower part of the stopper (520), or may be located inside the U-shape.

[0051] Therefore, the position of the link bar (325) changes according to the tilting angle of the backrest (400), and in that changed state, the stopper member (520) protrudes forward to fix the position of the link bar (325), thereby fixing the angle of the changed backrest (400) so that the user can use it in the desired state.

[0052] Additionally, an operating wire (536) is further connected to one side of the stopper member (520), and the other end of the operating wire (536) is connected to a separately provided operating lever (530), so that the user can control the tilting state of the backrest member (400) by moving the stopper member (520) backward through the operating lever (530).

[0053] Here, the operating lever (530) comprises a lever body (532) installed on one side of a base member (310) constituting the seat portion (300) and a lever (534) movably provided on the inside of the lever body (532), and a cover is further provided on the outside of the operating wire (536).

[0054] At this time, the operating wire (536) is connected to the end of the lever (534), so when the user pulls the lever (534), the stopping member (520) is pulled backward as the operating wire (536) is pulled, thereby allowing the link bar (325) to move freely up and down inside the link hole (425).

[0055] Of course, when the user releases the lever (534), the stopper member (520) moves forward due to the elastic force of the spring (not shown), thereby restricting the movement of the link bar (325).

[0056] In addition, as shown in FIG. 10, another embodiment of the present invention is formed with an uneven surface (330) along the front-rear direction on one side of the base member (310), and a stopper protrusion (333) is installed so as to protrude from the inside of the guide groove (322) to fix the movement of the seat member (320) by pressing the uneven surface (330).

[0057] Here, a stop guide groove (332) is formed on the inner side of the guide groove (322) at a position corresponding to the uneven part (330), and the stop protrusion (333) is installed on the inner side of the stop guide groove (332) so as to be able to protrude outward.

[0058] Meanwhile, a spring (334) is provided on the inner side of the stop guide groove (332) to elastically support the stop protrusion (333) in the direction of the uneven part (330), and an operating wire (336) is installed on the rear part of the stop protrusion (330) to penetrate the stop guide groove (332) and protrude outward.

[0059] At this time, the other end of the operating wire (336) is connected to a control lever (not shown) provided separately, so that the user moves the stop protrusion (333) backward through the control lever, allowing the seat member (320) to move back and forth easily, and when the force pulling the control lever is removed, the stop protrusion (333) presses the uneven part (330) by the elastic force of the spring (334) to fix the seat member (320).

[0060] Although preferred embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and the scope of the present invention extends to those within a substantially equivalent range to the embodiments of the present invention. Various modifications can be made by those skilled in the art to which the present invention belongs, without departing from the spirit of the present invention. Industrial applicability

[0061] The present invention relates to a chair, and more specifically, to a chair in which, when a user rotates the backrest portion backward, the seat member constituting the seat portion also moves forward in correspondence to prevent slipping between the backrest portion and the seat member constituting the seat portion, thereby allowing for comfortable use, and furthermore, the angle between the seat member constituting the seat portion and the backrest portion is fixed in an adjusted state so as to allow for use according to the user's condition. Explanation of the symbols

[0062] 200 : Chair 210 : Legs 220 : Armrest section 300 : Seat section 310 : Base member 320 : Seat member 330 : Uneven parts 400 : Backrest part 410 : Backrest component 420 : Connecting bracket 500 : Fixing device 510 : Fixed body 520 : Stopper member 530 : Operating lever

Claims

Claim 1 The device comprises a leg portion supported on the floor, a seat portion installed on the upper part of the leg portion, and a backrest portion installed on the rear part of the seat portion, wherein as the backrest portion tilts, a seat member constituting the seat portion moves back and forth, wherein the seat portion comprises a base member installed on the upper part of the leg portion, the seat member installed to be capable of sliding back and forth on the upper part of the base member, and support brackets installed on both sides of the base member, wherein the backrest portion comprises a backrest member that supports the user's back, and connecting brackets installed on both lower sides of the backrest member and rotatably installed on the upper part of the support brackets, wherein a first link member is formed to protrude downward from the lower rear end of the seat portion, and a second link member is installed on the upper surface of a lower plate installed to connect the lower part of the connecting bracket to correspond to the first link member, a link bar is installed to penetrate the first link member and the second link member from left to right, and the link bar is inserted into the second link member. A chair characterized by the formation of an elongated link ball. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 A chair according to claim 1, characterized in that a guide portion is formed at the lower part of the seat member, and a guide groove into which the base member is inserted is formed at the center of the guide portion. Claim 6 A chair according to claim 1, wherein the second link member is further provided with a fixing device that restricts the movement of the link bar, the fixing device comprises a fixing body fixed to the side of the second link member, a U-shaped stopping member installed to protrude forward along a moving groove formed on the inner side of the fixing body, and a spring that elastically supports the stopping member in the direction of the link bar, and wherein the link bar is supported by being located on the upper, lower, and inner sides of the stopping member, respectively. Claim 7 A chair according to claim 6, wherein one end of an operating wire is connected to one side of the stopper member, and the other end of the operating wire is connected to an operating lever installed on one side of the seat portion, and the operating wire is pulled by the operating lever to move the stopper member backward. Claim 8 A chair according to claim 5, wherein an uneven surface is formed along the front-rear direction on one side of the base member, a stop guide groove is formed on the inner side of the guide groove, a stop protrusion is installed in the stop guide groove to protrude so as to be inserted into the uneven surface to fix the movement of the seat member, and a spring is provided on the inner side of the stop guide groove to elastically support the stop protrusion in the direction of the uneven surface.

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