KR102193999B1 - Chair with adjustable lumbar support - Google Patents

Abstract

The present invention relates to a chair having an adjustable lumbar support member, capable of easily adjusting the front and rear positions and angle of a back seat supporting the lumbar vertebrae in accordance with the body of a sitting person while supporting the back of the sitting person by naturally surrounding the back through the back seat twisted laterally by power from the leaning of the sitting person. According to the present invention, the chair includes: a seat; legs supporting the seat; a back including a back frame having a lumbar curve part connected with the seat to elastically support the lumbar vertebrae of a sitting person in a curved form, and a back seat combined with the back frame; and a lumbar support member adjusting the lumbar curve part such that the part can be curved. The lumbar support member includes: a frame support including a support base connected to the rear side of the seat to have a tilting space, and a support post connected to support an upper part of the back frame; a tilting base connected to the tilting space of the support base to be tilted forward and backward; a tilting operation member operating the tilting base such that the tilting base can be tilted forward and backward; and a tilting joint connecting the back frame and the tilting base so as to elastically curve the lumbar curve part in interoperation with the back frame when the tilting base is tilted by the operation of the tilting operation member.

Description

Chair with adjustable lumbar support member {CHAIR WITH ADJUSTABLE LUMBAR SUPPORT}

The present invention relates to a chair having an adjustable lumbar support member, and more particularly, to easily adjust the front and rear positions and angles of the backrest seat supporting the lumbar spine according to the body of the seated person, and at the same time, the backrest seat by the force that the seatee reclines. It relates to a chair having an adjustable lumbar support member capable of supporting by naturally wrapping the back while being twisted from side to side.

As is well known, a chair is an apparatus used by a person to sit astride, and such a chair includes a seat plate for supporting the buttocks, legs for supporting the seat plate, and a back support for supporting the back.

In recent years, instead of a cushion-type backrest, a mesh-type chair having a backrest combined with a mesh fabric having excellent elasticity is in the spotlight. The mesh-type chair has the advantage of having excellent ventilation compared to the conventional cushion-type chair and not only improving the seating feeling due to the excellent elasticity of the mesh fabric itself, but also reducing weight and creating a beautiful aesthetic.

Recently, as the time to sit on a chair or study office work increases, many people complain of back pain as they maintain a good posture of bending their back. This is because the lower part of the spine, the lumbar part, is very gentle'C. 'Because it takes a shape.

If you sit for a long time in a posture that is not good for your back, the lumbar spine becomes straight and straight, and your weight is not evenly distributed throughout the spine, but is concentrated in the lumbar spine, so you feel stiffness and pain due to fatigue in the lumbar spine .

As a conventional technology for solving such inconvenience, Korean Patent Registration No. 1754071 (Registration Date June 29, 2017)'Chair Back with Lumbar Support' and Korean Registration Patent No. 1976348 (Registration Date May 2019) 01th)'A mesh-type chair that removes the lumbar support means that can be adjusted in height' is disclosed.

However, the above-described prior art has the inconvenience that it is difficult to easily adjust according to various physical conditions of the seated person as the configuration for supporting the lumbar spine of the seated person moves finely from side to side or adjusts the height.

In addition, the above-described prior art only supports the lumbar spine of the seated person, but there is a problem in that the back cannot be naturally wrapped and supported according to the left and right eccentricity of the seated person.

(0001) Republic of Korea Patent Registration No. 1754071 (Registration Date June 29, 2017) (0002) Korean Patent Registration No. 1976348 (Registration Date May 1, 2019)

The present invention has been conceived to solve the conventional problems as described above, and an object of the present invention is to easily adjust the front and rear position and angle of the backrest seat supporting the lumbar spine in accordance with the body of the seated person and at the same time It is to provide a chair having an adjustable lumbar support member capable of supporting by naturally wrapping the back while the back seat is twisted from side to side.

The present invention for achieving the above object is a back frame having a seat plate, a leg supporting the seat plate, a lumbar curved portion connected to the seat plate and elastically curved and supporting the lumbar spine of the seated person, and a back support seat coupled to the back support frame And a lumbar support member configured to elastically bend a lumbar curved portion of the backrest, wherein the lumbar support member is connected to the rear of the seat plate to have a tilting space and a support base and the support base A frame support including a support post connected to the upper rear of the backrest frame, a tilting base connected to the tilting space of the support base so that it can be tilted back and forth, a tilting operation member that operates to tilt the tilting base back and forth, and the tilting operation member operates. It is a technical idea to include an adjustable lumbar support member including a tilting joint that connects the tilting base and the backrest frame so that the backrest frame interlocks with the tilting base to elastically bend the lumbar curved portion when the tilting base is tilted. .

The frame support of the present invention is connected to the rear of the seat plate and formed with a tilting space to accommodate the tilting base in a tiltable manner, and vertically connecting both rear sides of the support base and the upper rear sides of the backrest frame. May include support posts.

At this time, the present invention is provided on both sides of the inner surface of the tilting space of the support base, a guide rail formed forward and backward, a hub formed on the guide rail, a pivot formed on both sides of the inner surface of the tilting space so as to be close to the tip of the guide rail, It may further include pivot holes provided on both side surfaces of the tilting base to be rotatably connected, and tilting guides provided on both side surfaces of the tilting base to correspond to the hub.

At this time, the tilting operation member of the present invention is rotatably coupled to the hub of the frame support so as to penetrate both sides of the tilting base to have an operating shaft having spur gears, and a rack to engage the spur gears, and the frame support The slider may include a slider coupled to the guide rail of the slider, and a tilting pin provided on one side of the inner surface of the slider and coupled to guide the tilting of the tilting guide during sliding.

At this time, in the tilting guide of the present invention, a multi-stage step hole may be formed to stepwise guide the tilting angle of the tilting pin.

At this time, a rotation knob may be provided at an outer end of the operating shaft of the present invention.

At this time, the upper end of the support post of the present invention may be rotatably connected to an upper rear portion of the backrest frame with an axial pin.

The tilting joint of the present invention may be made of a synthetic resin material that can be twisted left and right to support the back of the seated person while the back frame is twisted in the direction of the force that the seated on the seat plate leans against the back.

According to the embodiment of the present invention implemented by the above-described solution, the tilting base is tilted back and forth while turning the rotation knob in the right or left direction, so that the degree of curvature of the lumbar bend is easily adjusted, so that various people with different physical conditions can use it. It can have a very useful effect.

In addition, according to the present invention, the tilting joint that transmits the tilting force of the tilting base to the backrest frame is twisted from side to side to support the back of the seated occupant leaning eccentrically on the backrest, thereby improving the comfort of the seated person.

1 is a perspective view showing an overall form according to an embodiment of the present invention.
Figure 2 is a perspective view showing a lumbar support member according to an embodiment of the present invention.
Figure 3 is a right side view showing a lumbar support member according to an embodiment of the present invention.
4 is an exploded perspective view showing an exploded state of a tilting base and a frame support according to an embodiment of the present invention from the front.
5 is an exploded perspective view showing an exploded state of a tilting base and a frame support according to an embodiment of the present invention from the rear.
6 is a perspective view showing a state in which a tilting base and a frame support are combined according to an embodiment of the present invention from the rear.
Figure 7 is a perspective view showing the upper connection of the back frame and frame support according to an embodiment of the present invention from the rear.
8 and 9 are operational views showing the operating state of the lumbar support member according to the embodiment of the present invention from the right side.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those with average knowledge in the art.

Accordingly, the shape of the constituent elements expressed in the drawings may be exaggerated to emphasize a more clear description. It should be noted that in each drawing, the same member may be indicated by the same reference numeral. In addition, detailed descriptions of known functions and configurations determined to unnecessarily obscure the subject matter of the present invention will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is a back frame 310 having a seat plate 100, a leg 200 supporting the seat plate 100, a lumbar curved portion 311 connected to the seat plate 100 and elastically curved, and the back frame 310 ) And a lumbar support member 400 for elastically bending the lumbar curved portion 311 so as to support the lumbar spine of a seated person leaned on the backrest 300 and a back 300 provided with a backrest seat 320 coupled thereto.

First, the X-axis of the coordinates shown in FIG. 1 is defined as a left-right direction, a Y-axis is a front-rear direction, and a Z-axis is defined as a vertical direction.

The seat plate 100 is configured to support the buttocks, and the seat plate 100 includes a seat plate frame 110, a seat plate seat 120, and a locking unit 130.

Referring to FIG. 1, the seat plate 100 is a seat plate frame 110 having a substantially rectangular frame shape, a seat plate seat 120 that is coupled along an upper edge of the seat frame 110 to support the butt of a seated person, and a seat plate frame 110. It is mounted on the lower portion of the seat plate 100 includes a locking unit 130 for controlling the elevating.

A plurality of seat slits 111 are formed at predetermined intervals along the front and rear directions on the front upper surface of the seat frame 110, and these seat slits 111 are flexibly moved downwards by the load of the seated seated on the seat seat 120. It is curved and elastically supports the thigh.

The seat plate 120 is implemented as a mesh fabric and is fixed along the upper edge of the seat plate frame 110.

The locking unit 130 is mounted under the seat frame 110 and controls the lifting of the lifting cylinder 210 vertically connected to the leg 200.

The leg 200 is configured to support the seat plate 100 from the ground, and the leg 200 is formed of a plurality that are radially connected at the lower center of the lifting cylinder 210.

In addition, casters 220 are coupled to the plurality of legs 200 to improve mobility of the present invention.

The backrest 300 is a configuration that supports the back of the seated person as a whole, and such a backrest 300 is a backrest frame 310 having a vertically long rectangular frame shape, and the front edge of the backrest frame 310 as shown in FIG. It is fixed to and includes a back seat 320 for supporting the back of the seated person.

Referring to FIG. 2, lumbar curves 311 are provided on both lower sides of the backrest frame 310 to elastically support the lumbar spine of a seated person. A plurality of lumbar slits 312 are formed at predetermined intervals along the vertical direction on the surface of the lumbar curved portion 311 to be elastically and flexibly curved while interlocking when the tilting base 420 is tilted. In addition, a headrest 330 may be connected to the upper rear portion of the backrest frame.

Referring to FIG. 5, a joint upper groove 313 is formed in the center of the lower surface of the backrest frame 310 to couple the upper end of the tilting joint 440.

The backrest seat 320 is implemented with a mesh fabric and is coupled along the front edge of the backrest frame 310.

The lumbar support member 400 elastically flexes the lumbar curved portion 311 of the backrest 300 in order to support the lumbar spine of the seated person leaned on the backrest 300 according to the body shape.

4 and 5, the lumbar support member 400 is connected to the rear of the seat plate 100 and has a support base 411 having a tilting space 412, and the support base 411 and the back support frame 310 The frame support 410 including the support post 416 connected to the upper rear side of the frame support 410, the tilting base 420 connected to the tilting space 412 of the support base 411 so as to be tiltable back and forth, and the tilting base 420 tilt back and forth When the tilting operation member 430 and the tilting operation member 430 are operated so that the tilting base 420 is tilted, the backrest frame 310 is interlocked so that the lumbar bent portion 311 is elastically curved. It includes a tilting joint 440 connecting the 420 and the back frame 310.

The frame support 410 is a support base 411 connected to the rear center of the seat plate 100, a support post 416 vertically connecting both rear left and right sides of the support base 411 and upper both sides of the backrest frame 310, respectively. ).

A tilting space 412 open toward the rear is formed in the center of the support base 411, and a guide rail 413 having a hub 414 is formed long in the front and rear directions at the centers of both sides of the inner surface of the tilting space 412. , Pivots 415 are provided on both sides of the inner surface of the tilting space 412 close to the guide rail 413, so that the pivot holes 422 of the tilting base 420 to be described later are tiltable back and forth.

The support post 416 is vertically elongated and the lower end is connected to the support base 411 and the upper end is rotatably connected to the upper part of the backrest frame 310. 7 and 8, the upper end of the support post 416 is connected by a shaft pin 417 formed horizontally on the rear upper portion of the backrest frame 310 and rotates in the front and rear direction, so that when the tilting base 420 is tilted The lumbar curved portion 311 of the interlocked backrest frame 310 may be elastically and flexibly curved.

The tilting base 420 is formed in an approximately hexahedral shape to form a base that is tilted in the front-rear direction by the tilting operation member 430.

4 and 5, a tilting guide 421 having a multi-stage step hole 421a is provided behind the left and right sides of the tilting base 420 by the tilting pin 435 of the slider 433 to be described later. Guided.

And pivot holes 422 are formed in front of the left and right sides of the tilting base 420 so as to be rotatably coupled to the pivot 415 of the frame support 410, and the shaft hole 423 is formed vertically in the center. The operation shaft 431 of the tilting operation member 430 to be described later penetrates left and right. A joint lower groove 424 is formed in the rear upper portion of the tilting base 420 so that the lower end of the tilting joint 440 is coupled.

The tilting operation member 430 is a configuration for tilting the tilting base 420 back and forth by the operation of the seated person, and the tilting operation member 430 is a shaft of the tilting base 420 as shown in FIGS. 4 and 5 A rack 434 is provided so as to be rotatably coupled to the hub 414 of the frame support 410 so as to penetrate the hole 423 to engage the operating shaft 431 having the spur gear 432 and the spur gear 432 The slider 433 is slidably coupled to the guide rail 413 of the frame support 410, and is provided on one side of the inner surface of the slider 433 to guide the tilting of the tilting guide 421 during sliding. It includes a tilting pin 435 coupled to 421a).

The operating shaft 431 is formed of a long rod having a hexagonal or polygonal cross section, and a rotation knob 436 is coupled to the outer end of the operating shaft 431 to rotate the operating shaft 431 by the operation of the seater. , A spur gear 432 is provided on one side close to the rotation knob 436, and is engaged with the rack 434 to linearly move the slider 433. The operating shaft 431 is rotatably coupled to both hubs 414 of the frame support 410 so as to penetrate the shaft hole 423 of the tilting base 420.

The slider 433 is formed in a belt shape of a caterpillar and is slidably coupled to the guide rail 413 of the frame support 410 in the front and rear directions. A rack 434 is provided on the upper or lower inner surface of the slider 433 to engage the spur gear 432 of the operating shaft 431.

The tilting pin 435 is integrally formed on one side of the inner surface of the slider 433 and is coupled to any one step hole 421a of the tilting guide 421. The tilting pin 435 moves together when the slider 433 slides and is coupled to any one step hole 421a to guide the tilting of the tilting guide 421 before and after.

4 and 5, it can be seen that the inclined angle of the slider 433 and the inclined angle of the tilting guide 421 are formed differently.

The tilting joint 440 is a configuration that connects the upper portion of the tilting base 420 and the lower portion of the backrest frame 310, and the tilting joint 440 is interlocked with the backrest frame 310 by tilting the tilting base 420 The tilting function of tilting as much as possible and the backrest frame 310 twisting left and right by the leaning force of the seated person also serve as a twist function to support the back.

4 and 5, the tilting joint 440 supports the back frame 310 and has a rigid property that can transmit the tilting force of the tilting base 420 and a flexible property that can be elastically bent in the left and right directions. It is made of TPE (thermoplastic elastomer)-based material and is formed in a flat plate shape. The upper end of the tilting joint 440 is coupled to the joint upper groove 313 of the backrest frame 310 and the lower end is coupled to the joint lower groove 424 of the tilting base 420 to be firmly fixed.

The tilting joint 440 transmits the front and rear tilting force of the tilting base 420 by the operation of the tilting operation member 430 to the backrest frame 310 to connect the lumbar curved portion 311 to be elastically curved. (tilting) function.

In addition, the tilting joint 440 is the backrest frame 310 is twisted in the left and right direction as shown in the arrow direction shown in Figure 2 by the force that the seated person leans against the backrest 300, and the backrest seat 320 is It naturally wraps and supports the twist (twist) function.

The overall operation of the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, when a seater seated on the seat plate 100 rotates the operating shaft 431 by rotating the rotation knob 436 in the right direction by hand, the rack 434 meshed with the spur gear 432 as shown in FIG. Since it is guided in a linear motion, the slider 433 slides forward along the guide rail 413.

At this time, since the tilting guide 421 is guided by the tilting pin 435 moving from the rear step hole 421a to the front step hole 421a, the tilting base 420 tilts forward as shown in FIG. do.

Here, it can be seen that the tilting angle of the tilting base 420 is changed through the difference between the angle A1 shown in FIG. 8 and the angle A2 shown in FIG. 9.

Subsequently, the tilting force of the tilting base 420 is transmitted to the lower portion of the backrest frame 310 through the tilting joint 440, whereby the plurality of lumbar slits 312 are elastically opened, and the lumbar bent portion 311 is It is curved forward to support the seated person's lumbar spine.

The present invention can adjust the degree of curvature of the lumbar bend 311 by further turning the rotation knob 436 in the right direction or in the opposite direction according to the above-described process, so that the lumbar bend portion can meet various physical conditions of the seated person. (311) can be adjusted.

On the other hand, when the seater seated on the seat plate 100 tilts in one direction of the backrest 300 and leans against it, the tilting joint 440 is twisted in the direction of the reclining force, whereby the backrest frame 310 is also a tilting joint. Since it is twisted in the twisting direction of (440), it is naturally supported by wrapping the entire back of the seated person leaned on the backrest seat 320.

Accordingly, the tilting joint 440 of the present invention not only transmits the front and rear tilting force of the tilting base 420 to the backrest frame 310, but also twists left and right to surround the back of a seated occupant leaning eccentrically on the backrest 300. It has two functions.

The embodiments of the present invention described above are merely exemplary, and those of ordinary skill in the art to which the present invention pertains will appreciate that various modifications and other equivalent embodiments are possible.

Therefore, it will be appreciated that the present invention is not limited to the form mentioned in the detailed description above.

Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. In addition, the present invention is to be understood as including the spirit of the present invention as defined by the appended claims and all modifications, equivalents and substitutes within the scope thereof.

100: seat 110: seat frame
120: seat seat 130: locking unit
200: leg 210: lifting cylinder
220: caster 300: backrest
310: back frame 311: lumbar curve
312: back slit 320: back seat
400: lumbar support member 410: frame support
411: support base 412: tilting space
413: guide rail 414: hub
415: pivot 416: support post
417: shaft pin 420: tilting base
421: tilting guide 421a: step hole
422: pivot hole 423: shaft hole
430: tilting operation member 431: operation shaft
432: spur gear 433: slider
434: rack 435: tilting pin
436: rotation knob 440: tilting joint

Claims (7)

A seat plate, a leg supporting the seat plate, a backrest frame having a lumbar curvature connected to the seat plate and elastically curved and supporting the lumbar spine of the seated person, a backrest provided with a backrest seat coupled to the backrest frame, and a lumbar flexion portion of the backrest Including a lumbar support member for adjusting to elastically curved,
The lumbar support member is a frame support including a support base connected to the rear of the seat plate and having a tilting space, and a support post connected to an upper rear of the support base and the backrest frame, so that it is possible to tilt forward and backward in the tilting space of the support base. A connected tilting base, a tilting operation member that operates so that the tilting base is tilted forward and backward, and when the tilting base is tilted by the operation of the tilting operation member, the backrest frame interlocks with the tilting base so that the lumbar curve is elastically curved. A chair having an adjustable lumbar support member including a tilting joint connecting between the backrest frames. The method according to claim 1,
The frame support includes a support base connected to the rear of the seat plate and having a tilting space formed to accommodate the tilting base to be tiltable, and a support post vertically connecting both rear sides of the support base and upper rear rear sides of the backrest frame. A chair having an adjustable lumbar support member, comprising: a. The method according to claim 2,
Guide rails provided on both sides of the inner surface of the tilting space of the support base and formed to be elongated back and forth, hubs formed on the guide rails, pivots formed on both sides of the inner surface of the tilting space so as to be close to the tip of the guide rail, and rotatably connected to the pivot Further comprising pivot holes provided on both sides of the tilting base, and tilting guides provided on both sides of the tilting base to correspond to the hub,
The tilting operation member is rotatably coupled to the hub of the frame support so as to pass through both sides of the tilting base and includes an operating shaft having spur gears, and a rack to engage the spur gears to slide on the guide rails of the frame support. A chair having an adjustable lumbar support member, characterized in that it comprises a slider coupled to enable possible, and a tilting pin provided on one side of an inner surface of the slider and coupled to guide tilting of the tilting guide during sliding. The method of claim 3,
A chair having an adjustable lumbar support member, characterized in that the tilting guide has a multi-stage step hole formed to guide the tilting angle of the tilting pin in stages. The method of claim 3,
A chair having an adjustable lumbar support member, characterized in that a rotation knob is provided at an outer end of the operating shaft. The method according to claim 2,
A chair having an adjustable lumbar support member, characterized in that the upper end of the support post is rotatably connected to a rear upper portion of the back support frame with an axial pin. The method according to claim 1,
The tilting joint has an adjustable lumbar support member, characterized in that it is made of a synthetic resin material that can be twisted left and right to support the back of the seated person while the back frame is twisted in the direction of the force that the seated on the seat plate leans against the back. chair.

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