JP5536096B2 - Chair with separate lumbar and thoracic vertebra support - Google Patents

Description

  The present invention relates to a chair having a separate interlocking lumbar vertebra and thoracic vertebra support, and more particularly, a backrest is physically separated by a lumbar support and a thoracic vertebra support, and the lumbar support can be bent at the same time. Because they are formed in an interlocking manner, the lumbar support allows a relatively large angle of the back warp when the occupant curves back and back for rest or strain relief The thoracic vertebra support part and the thoracic vertebra support part are provided with the lumbar support part and the thoracic vertebra support part. In addition to being linked to each other, the lumbar spine and thoracic vertebra are independently shared to support each other easily. Having a posture safety excellent characteristics, it relates to a chair having a separate linked lumbar and thoracic support.

  In today's intensely competitive society, and with the use of computers becoming a part of life, the time spent sitting on chairs of modern people tends to be plated more than in the past. Among them, there are a growing number of students who complain of low back or spinal pain among students, examinees, or office workers who live on a chair for a considerable time.

  Such low back pain or thoracic spondylodynia can be repeated over a long period of tension, habitually incorrect seating posture, wrong posture and sleep in the environment, or excessive force in the wrong posture. Most of the cases are caused by the transmission of

  Therefore, the office chairs with a conventional backrest for supporting the lumbar and thoracic vertebrae can be used for occasional rest due to sitting for a long period of time or to relieve occasional strain on the lumbar and thoracic support ligaments and muscles. The elastic structure is adopted so that most of the backrest will turn back.

  However, such a chair with an elastic backrest, in which the backrest for supporting the lumbar vertebrae and the thoracic vertebrae is integrated, is curved into an “S” shape when the thoracic vertebrae and the lumbar vertebra are viewed from the whole side. When the seated person curves back and back due to the structure of the human spine, the thoracic vertebra part closely supports the upper half of the backrest, but the lumbar part has a rather large space and is separated from the lower half of the backrest. This phenomenon becomes more severe around the thoracic and lumbar boundary, making it a major factor that makes the lumbar or lumbar / back boundary unreasonable or uncomfortable. There is a problem of becoming.

  Therefore, in order to solve the above problems, many chair users use an auxiliary cushion to supplement the space behind the hips, but the human body size and posture of the seated person are different. It is not easy to select an auxiliary cushion with proper volume, shape, and elasticity, and if you select and use an item that does not suit you, the use effect will be minimal, or conversely correct seating There is a problem that there is a risk of losing posture, and there is a risk of loss.

  As a conventional method for solving the above-mentioned conventional problems, Korean Patent Publication No. 10-2005-0046953 (release date: 05.05.19. Patent No. 10-0585855) by the present inventor is shown in FIG. 7, the backrest is separated and formed by the back support portion 4 and the waist support portion 3, one end of the metal backrest frame 4 a is connected to the back support portion 4, and the extension portion 4 e forming the other end is formed at the lower portion of the seat portion 2. As shown in FIG. 8, a chair 1 'having a waist support portion structured to be connected to a plate spring 4f extended to the multi-function bracket 7 is disclosed. At the same time, as shown in FIG. The support part 4 and the waist support part 3 are separately formed, one end of the leaf spring 4f is connected to the extension part of the back support part 4, and the other end is connected to the multifunction bracket 7 below the seat part 2. Although a chair 1 ″ having a built-in waist support portion is disclosed, the conventional chair (1 ′ or 1 ″) does not have a back support portion 3 formed integrally with the seat portion 2 afterward. Since it is rigid and does not interlock with the back support 4 and is generally formed upright and smooth, when the seated person warps the waist and back part back later, Since a space is generated without change, it is not satisfactory in terms of ergonomics in terms of comfort. In addition, the bending angle at the boundary between the waist support part 3 standing upright without bending and the back support part 4 inclined rearward may increase, making the boundary between the waist and back unreasonable or causing discomfort. The problem of being left unimproved.

  Further, the conventional chair (1 'or 1 ") has a problem that the appearance is inferior because of the strip shape in which the metal back frame 4a is exposed to the outside.

  In the drawings, unexplained reference numeral 6 represents an arm rest, 7a represents a frame, and 9 represents a supporting leg.

  Therefore, the first object of the present invention is to ensure that the lumbar vertebrae and the thoracic vertebra part are firmly supported when seated in the correct posture, and at the same time, when the seated person greatly warps the waist and back part later, the space is generated in the lumbar part. It is another object of the present invention to provide a chair having an ergonomic separate interlocking lumbar vertebrae and a thoracic vertebra support portion that can provide comfort while being supported closely.

  In addition to the first object, the second object of the present invention is an ergonomic separation-linked lumbar vertebrae that is excellent in posture safety of the chair itself even when the seated person largely warps the waist and back part. The object is to provide a chair having a thoracic spine support.

  The third object of the present invention, in addition to the first and second objects, is that there is no need to extend the arm resting on the arm rest even when the seated person greatly warps the waist and back part. An object of the present invention is to provide a chair having an ergonomic separate interlocking lumbar vertebrae and a thoracic vertebra support portion which can be maintained as they are originally, and has improved comfort and comfort.

  In addition to the first and second objects, the fourth object of the present invention is that the height of the armrest can be easily adjusted according to the height and usage of the seated person, so that the human body has improved comfort and comfort. It is an object of the present invention to provide a chair with an engineered separately interlocked lumbar and thoracic vertebra support.

  A fifth object of the present invention is an ergonomic separation interlocking lumbar vertebrae that can easily perform the bending of the backing plate of the synthetic resin material at the same time when the thoracic vertebra support part is bent backward, in addition to the above-mentioned objects and the like. And providing a chair having a thoracic spine support.

  The sixth object of the present invention is to provide a chair having an ergonomic separation interlocking lumbar vertebrae and a thoracic vertebra support part in which a good seating feeling by an air cushion is given to the seat part in addition to the above-mentioned object and the like. It is to provide.

  According to a preferred aspect of the present invention for smoothly accomplishing the first and second objects of the present invention, the backrest portion is constituted by a lumbar support portion and a thoracic vertebra support portion having a frame, and the lumbar support The seat part and the seat part are integrally formed by an interior frame, and the frame of the thoracic vertebra support part is elastically connected to the frame or bracket on the bottom surface of the seat part by a plate spring so as to be inclined, and has an arm rest. In the chair, the interior frame is separately formed by a main frame extending from a seat portion to a lower half portion of the lumbar support portion and at least one auxiliary frame located in an upper half portion of the lumbar support portion. The frame and the at least one auxiliary frame are separated from each other by at least one leaf spring. It is characterized in that the lumbar support part is configured to be backwardly bent by being backed.

  According to another desirable aspect of the present invention for smoothly accomplishing the first and second objects of the present invention, the thoracic vertebra support portion in the above-described mode is provided with an extension portion via a short edge. And an upper end of the lumbar support part is in contact with the short edge.

  According to a preferred aspect of the present invention for smoothly achieving the third object of the present invention, in the above aspect, one end of the frame of the armrest is fixed to the lower portion of the extension portion of the thoracic vertebra support portion by a fixing tool. Thus, the armrest is interlocked and lifted when the thoracic vertebra support part is warped backward.

  According to a preferred aspect of the present invention for smoothly achieving the fourth object of the present invention, a height adjusting bracket formed with a plurality of fixing protrusions on the inner side of the armrest and connected to an arm seat, The arm seat includes a frame having a plurality of fixing protrusion insertion grooves formed at one end while the end is inserted into the height adjustment bracket, and the arm seat is pulled in and out of the frame. The height, or the height and the length can be adjusted simultaneously.

  According to a desirable aspect of the present invention for smoothly achieving the fifth object of the present invention, the thoracic vertebra support part is fixed to a back surface of a main body made up of a cushioning material and a soft jacket surrounding the cushion material. In addition, the back of the frame is covered with a hard jacket, and a cutout is formed laterally at the position where the extension of the hard jacket is formed, so that bending stress can be eliminated during back warping. Features.

  According to a desirable aspect of the present invention for smoothly achieving the sixth object of the present invention, at least one air inlet / outlet cap having a plurality of air inflow / outlet holes attached to a side surface of the seat portion is attached. It is characterized by.

  According to a desirable aspect of the present invention for smoothly achieving the various objects of the present invention, one end of the connecting frame is fixed to the lower end portion of the frame of the thoracic vertebra support portion and the other end is fixed to the bottom surface of the seat. It is characterized in that it is inserted into and fixed to a frame that can be pivoted by a link to a fixed bracket so as to be adjustable in length, and the frame that can be pivoted is elastically supported by a plate spring.

  According to the present invention, the chair having the ergonomic separation interlocking lumbar vertebra and thoracic vertebra support part is formed by separating the backrest part from the lumbar support part and the thoracic vertebra support part, and at the same time forming the lumbar support part to be curved, while supporting the lumbar support. The lumbar and thoracic vertebrae are constructed in an interlocking manner so that the lumbar and thoracic vertebrae can be securely supported when seated in the correct posture. Even in the case where the arm is greatly warped later, it is possible to improve the feeling of comfort and peace of mind by maintaining a firm close support without generating space in the lumbar part, while the chair does not overturn in such a state, The posture safety is excellent, and the height of the armrest can be easily adjusted depending on the height and usage of the seated person, so that the feeling of comfort and comfort can be further promoted or added to this. Good sit-down feeling due to cushion applied to the sheet section.

1 is a perspective view illustrating an upright state of a chair having a separate interlocking lumbar vertebra and a thoracic vertebra support according to a preferred embodiment of the present invention. It is a perspective view which shows the back warp state of FIG. It is a side view of FIG. FIG. 2 is a partially cut longitudinal sectional view in an upright state illustrated in FIG. 1. FIG. 3 is a partially cut longitudinal sectional view in a state of being warped backwards illustrated in FIG. 2. FIG. 6 is a perspective view illustrating an upright state of a chair having a separate interlocking lumbar and thoracic vertebra support according to another preferred embodiment of the present invention. It is a partial cut longitudinal cross-sectional view which shows the operating state of the chair with the conventional separated type lumbar vertebrae and thoracic vertebra support part by this inventor. It is a partial cut longitudinal cross-sectional view which shows the operating state of the chair with the conventional separated type lumbar vertebrae and thoracic vertebra support part by this inventor.

  Embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  First, FIG. 1 is a perspective view showing an upright state of a chair (1) having a separate interlocking lumbar vertebra and a thoracic vertebra support according to a preferred embodiment of the present invention, and FIG. 2 is a perspective view showing a back warped state of FIG. 3 is a side view of FIG. 1, and FIGS. 4 and 5 are partially cut longitudinal sectional views in the upright state and the backward warped state shown in FIGS. 1 and 2, respectively, for convenience. I will explain.

  A chair 1 having an ergonomic separate interlocking lumbar and thoracic vertebra support portion according to the present invention includes a seat portion 2, a lumbar support portion 3 that is formed integrally with the seat portion and can be bent backward, The thoracic vertebra support part 4 is physically separated from the lumbar support part 3 and has a frame 4a, a headrest 5 as an optional component, an armrest 6, the thoracic vertebra support part 4 and a seat part. It comprises a multi-function bracket 7 that elastically supports and connects the lower end portion of each of the two, a central shaft 8, and a support leg 9 to which a caster 9a (caster) is attached.

  First, the sheet portion 2 and the lumbar support portion 3 that are integrally formed will be described. In the region extending from the seat portion 2 to approximately the lower half or approximately the center of the lumbar support portion 3, An “L” -shaped main frame 2a is internally provided, and an auxiliary frame 3a is provided in an upper region from approximately the upper half or approximately the center of the lumbar support portion 3, and is provided in the lumbar support portion 3 of the main frame 2a. 2 is supported by the leaf spring 3b in a state where the extended one end and the lower end of the auxiliary frame 3a are spaced apart from each other, the force A in FIG. When acting, the lumbar vertebra support 3 is configured to bend backwards.

  In the figure shown as an example, only one auxiliary frame 3a and leaf spring 3b is shown, but the present invention may be composed of at least one or more, more specifically, a plurality of By backing with the respective plate springs 3b between the two end portions separated from each other with the auxiliary frames 3a spaced apart from each other, the lumbar support portion 3 can be gradually and gradually bent. Of course, this also falls within the scope of the present invention.

  The seat portion 2 and the lumbar vertebra support portion 3 have the auxiliary frame 3a and the main frame 2a as a core material, and are surrounded by a normal cushion material (not given a reference numeral), and the outer surface thereof is made of natural or synthetic fabric or the like. It is well known to put a jacket (not shown) made of non-woven or artificial or natural leather.

  The shape of the lumbar support 3 is formed so as to have an annular protrusion 3c at the center of the entire surface in consideration of the normal curvature of the human lumbar vertebra when standing upright. At this time, both side surfaces of the annular protrusion 3c are also formed. It is more desirable for reducing the fatigue level that the central portion is gently surrounded as a whole by projecting relatively a little.

  On the other hand, if necessary, at least one ordinary air inlet / outlet cap (not shown) formed with a large number of air inflow / outlet holes is attached to the side surface of the seat portion 2 to allow the air cushion to be seated. You can also feel the feeling. It is well known that such an air inlet / outlet cap (not shown) is desirable when the outer cover (not shown) is a synthetic resin sheet or leather.

  Next, the thoracic vertebra support 4 is formed of an independent member that is separate from the lumbar vertebra support 3, and the thoracic vertebra support 4 is short edged. edge) 4d has an extension 4e, and the short edge 4d is kept in contact with the upper end 3d of the lumbar support 3.

  The thoracic vertebra support portion 4 also has a frame 4a as a core material, and its surroundings are surrounded by a normal cushion material (not given a reference numeral), and the outer surface thereof is natural or synthetic fabric or non-woven fabric, or artificial or natural leather. Although it is usual to put a jacket (not shown), the thoracic vertebra support portion 4 is a cushioning material (not shown in the drawing) in consideration of the economical aspect and the aesthetic aspect as in the illustrated example. A frame 4a is fixed to the back surface of a main body (not shown) having a soft jacket (not shown) surrounding it, and a synthetic resin board or wooden chip board (chip board) is mounted on the back surface of the frame 4a. In the latter case, if necessary, a notch 4g can be formed laterally at a curved position where the extension 4e of the hard jacket 4b starts to be formed. Thus, the bending stress applied to the hard jacket 4b when the thoracic vertebra support 4 is warped backward can also be formed.

  A curved portion 4c is formed on the entire surface of the central portion of the thoracic vertebra support portion 4, and at this time, both side surfaces of the curved portion 4c are relatively slightly protruded so that the central portion is gently surrounded as a whole. Is more desirable for reducing fatigue.

  Of course, the frame 4a of the thoracic vertebra support portion 4 is extended to the lower end of the extension portion 4e.

  The headrest 5 is not essential in the present invention, and will be briefly described as an optional element by the illustrated example. Appropriate configuration can be adopted as necessary as to whether or not to adopt it and differences in configuration.

  In the illustrated example, the headrest 5 is formed so as to have a protruding portion 5a on the entire surface, and has a structure in which the back of the head can be easily wrapped and supported by the tension of the fabric. The load on the thoracic vertebra can be reduced. In the illustrated example, the headrest 5 can be fixed to one end of the connection frame 5b by a connector 5c, and the other end can be directly connected to the upper end of the frame 4a of the thoracic vertebra support part 4, but usually the thoracic vertebrae. It is inserted and fixed to the upper end of the support part 4 so that the height can be adjusted.

  Next, the armrest 6 will be described. The armrest 6 has an arm seat 6a made of various materials such as polyurethane having a feeling of cushion on which the arm is placed or having a good surface feel. In the usual case, the frame 6b is usually fixed to a bracket 7 (described later) on the bottom surface of the seat portion 2 or another frame, but the example illustrated in the present invention. Then, one end of the frame 6b is directly fixed to the lower end of the frame 4a of the thoracic vertebra support 4 by any appropriate fixing means 6c such as a fixing screw or spot welding.

Therefore, in the illustrated example of the present invention, one end of the armrest 6 is directly fixed to the lower end portion of the thoracic vertebra support portion 4, and the armrest 6 is interlocked when the thoracic vertebra support portion 4 is subjected to the force B in FIG. Thus, when the thoracic vertebra support 4 is bent backward, there is no need to re-take the arm placed on the armrest 6 so that the patient can relax or take a rest in an easy state. Become.
Although not shown in the corresponding drawings, as in the case of another embodiment according to the present invention shown in FIG. 6 to be described later, a height adjustment bracket (for example, in FIG. 6) having a plurality of fixing protrusions (not shown) formed therein. A reference numeral 6d) is formed integrally with the arm seat 6a or connected to the arm seat 6a, and a plurality of fixing protrusion insertion grooves (not yet inserted) are inserted into the insertion end of the frame 6b to be inserted into the height adjustment bracket. The arm seat 6a can be adjusted in height, or height and length can be adjusted at the same time by pulling out or pulling in this part from the height adjustment bracket in stages. This is also within the scope of the present invention.

  In succession, the bracket 7 is fixed to the bottom surface of the seat portion 2 and is a multi-functional bracket. This portion is a rotary knob 7b known as a tension lever adjusting round lever for adjusting the strength of tilting the backrest, and a chair. A known angle adjusting lever 7c to which a synchronized tilting mechanism capable of performing stepwise adjustment of the height and angle of inclination of the backrest is applied.

  A frame 7a is attached to one end of the bracket 7 so that the other end of the connecting frame 4f, one end of which is connected to the lower end of the frame 4a of the thoracic vertebra support portion 4, is fixed by a link 7e. 4f is inserted into and fixed to the frame 7a by a length adjusting fixture 7d so that the length can be adjusted, and the frame 7a capable of pivoting movement is elastically supported by a plate spring 7f so that the thoracic vertebra support portion 7 in FIG. At the time of backward warping due to the force B action, the bracket 7 is tilted backward while maintaining the elastic restoring force, and when the backward warping force is removed, the bracket 7 returns to the original state of maintaining the level.

  On the other hand, in the present invention, it is not necessarily essential but is an optional item. In the case of the illustrated rotary chair, the upper end portion of the central shaft 8 is fixed to the bracket 7 so as to be rotatable, and the lower end portion thereof is The support leg 9 is rotatably inserted into the center of the support leg 9, and the support end portions of the support leg 9 are less susceptible to occurrence of bottom scratches, for example, have less noise, and may be damaged. It is possible to mount a urethane caster 9a having a small amount and a high durability.

  The chair 1 having an ergonomic separate interlocking lumbar vertebra and thoracic vertebra support according to the present invention having the configuration according to the preferred embodiment of the present invention is used for a seated person to take a rest or to relax his / her back and back for relaxation. , The lumbar support 3 can be bent back at a relatively large angle by the plate spring 3b that backs the auxiliary frame 3a, and at the same time, an easy and easy complete close support for the waist is achieved. The thoracic vertebra support part 4 can be bent back at a relatively small angle while the upper end 3d of the lumbar support part 3 is in contact with the short edge 4d of the thoracic vertebra support part 4, so that However, since it is easy, easy, and complete close contact support is established, the lumbar support part and the thoracic support part are interlocked to each other independently to support the lumbar spine and the thoracic spine independently. Of course, it is not possible to fall after the entire chair even in the case where the occupant is deflect later increase the back and hips, there is a feature to chair their own attitude safety is excellent.

  In particular, in the illustrated example, when the thoracic vertebra support portion 4 is warped backward, one end of the armrest 6 is connected and fixed to the end portion thereof, so that the arm seat 6a of the armrest 6 also rotates together and tilts upward. So you can rest comfortably and comfortably without changing the position of the arm.

  FIG. 6 is a side view of a chair 1a having a separate interlocking lumbar vertebra and thoracic vertebra support according to another preferred embodiment of the present invention. The basic configuration is essentially the same as that shown in FIGS. 1 to 5 except for the armrest 6 portion, and only the difference will be described.

  In the illustrated example, a height adjustment bracket 6d having an armrest 6 formed with a plurality of fixing protrusions (not shown) is formed integrally with the arm seat 6a, and inserted into the height adjustment bracket. A plurality of fixing protrusion insertion grooves (not shown) are formed at the insertion end of 6b, and the height adjustment bracket 6d is pulled out or retracted stepwise from the insertion end of the frame 6b, so that the physical condition of the seated person The height or height and length of the arm seat 6a can be adjusted at the same time according to usage conditions depending on environmental conditions. The other end of the frame 6b is not fixed to the thoracic vertebra support portion 4, but is fixed to the bracket 7 on the bottom surface of the seat portion 2, and the configuration excluding this is essentially the same as in the above-described embodiment, so that further explanation will be given. Is omitted.

  The chair 1a having an ergonomic separate interlocking lumbar vertebra and thoracic vertebra support according to another preferred embodiment of the present invention also has the remaining related operations except that the armrest 6 does not interlock with the thoracic vertebra support 4. Since it is equal, the explanation for this is also omitted.

  The ergonomic separate interlocking lumbar vertebrae and thoracic vertebra support according to the present invention, the lumbar support and the thoracic vertebrae are interlocked when the seated person is bent back and back for rest or strain relief, The lumbar spine and the thoracic spine can be shared independently and comfortably supported, as well as there is no worry that the entire chair will fall down and the posture safety is excellent, so if it is mass-produced industrially and supplied smoothly It can be said that there is no doubt that it will be well received by general consumers.

DESCRIPTION OF SYMBOLS 1 Chair with separation interlocking type lumbar vertebrae and thoracic vertebra support part 2 Seat (seat) part 2a Main frame 3 Lumbar vertebra support part 3a Auxiliary frame 3b Plate spring 3c Annular protrusion part 4 Thoracic vertebra support part 4a Frame 4b Hard jacket 4c Curved part
4d short edge
4e Extension part 4f Connection frame 4g Notch part 5 Headrest (headrest)
5a Protruding part 5b Connecting frame 5c Connecting tool 6 Armrest
6a Arm seat 6b Frame 7 Bracket 7a Frame 7b Rotation knob 7c Angle adjustment lever 7d Length adjustment fixture 7e Link 7f Plate spring 8 Center shaft 9 Support leg 9a Caster

Claims (7)

The backrest part is configured separately from a lumbar support part and a thoracic vertebra support part having a frame (4a). The lumbar support part and the seat part are integrally formed by an interior frame, and the frame ( 4a) is elastically coupled to the frame (7a) or the bracket on the bottom surface of the seat portion by a leaf spring so as to be inclined, and in a chair having an arm rest,
The interior frame is separated and formed by a main frame (2a) extending from the seat portion to the lower half of the lumbar support portion and at least one auxiliary frame (3a) located in the upper half portion of the lumbar support portion. The main frame (2a) and the at least one auxiliary frame (3a) are backed by at least one leaf spring so as to be separated from each other, and the lumbar support portion is configured to be bent backward. Characterized chair with separate interlocking lumbar and thoracic vertebra support.
The thoracic vertebra support part has an extension part via a short edge, and an upper end part of the lumbar vertebra support part is kept in contact with the short edge. A chair having a separate interlocking lumbar and thoracic vertebra support as described.
The one end of the frame (6b) of the armrest is fixed to the lower part of the extension portion of the thoracic vertebra support portion by a fixing tool, whereby the armrest is lifted in conjunction with the thoracic vertebra support portion when it is bent backward. Item 2. A chair having a separate interlocking lumbar vertebra and thoracic vertebra support according to Item 1.
A plurality of fixing protrusions are formed on the inner side of the armrest, and the height adjustment bracket connected to the arm seat, one end portion is inserted into the height adjustment bracket, and a plurality of fixing protrusion insertion grooves are formed in the one end portion. It is composed of a formed frame (6b), and the height or height and length of the arm seat can be adjusted at the same time by pulling in and pulling out the height adjustment bracket from the frame (6b). A chair having a separate interlocking lumbar vertebra and thoracic vertebra support according to claim 1 or 2 .
The thoracic vertebra support part has a frame (4a) fixed to the back surface of a main body composed of a cushioning material and a soft jacket surrounding the cushion material, and a hard jacket is coated on the back surface of the frame (4a). The separated interlocking lumbar vertebra and thoracic vertebra support part according to claim 1, wherein a notch is formed laterally at a position where the extension part is formed, so that bending stress can be eliminated during backward warping. Chair with.
The chair having a separate interlocking type lumbar spine and thoracic vertebra support part according to claim 1, wherein at least one air inlet / outlet cap having a plurality of air inflow / outlet holes attached to a side surface of the seat part.
One end of the connecting frame is fixed to the lower end of the frame (4a) of the thoracic vertebra support part, and the other end has a length to the frame (7a) fixed to be pivotable by a link to a bracket fixed to the bottom surface of the seat. The separated interlocking lumbar vertebra and thoracic vertebra support according to any one of claims 1 to 3, characterized in that the frame (7a) inserted and fixed in an adjustable manner and capable of the pivot movement is elastically supported by a leaf spring. A chair with a department.

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