KR20110128521A - Chair with a reclinable back support - Google Patents

Abstract

PURPOSE: A chair capable of adjusting the angle of a backboard is provided to support the lumbar vertebra of a user for preventing the waist disease, and to straightly spread the backboard if necessary. CONSTITUTION: A chair capable of adjusting the angle of a backboard comprises the following: a rotary shaft and displacement shaft located on left and right sides of the backboard; a housing(200) including a rotary shaft connection hole connected to the rotary shaft; a displacement bundle(300) including a driving block connected to the displacement shaft for linear slide-moving; and a locking unit(400) selectively fixing the location of the driving block.

Description

Chair with adjustable backrest {Chair with a reclinable back support}

The present invention relates to a technology in which the backrest angle adjustment can be made so that the user can use it more comfortably.

For humans walking upright, the most important part is the spine and abnormalities in the spine will affect the whole body and cause a major obstacle in the normal life.

As you age, your bone density naturally decreases and your spine curves, but even younger people suffer from more than spine. Representative spinal disorders include the herniated disc, the cause of which is various. In particular, most people spend a lot of time sitting in a chair, rather than walking, because most people sit on chairs to work or read at home.

If you sit on a chair, you need to sit upright and sit in the right position, but because of wrong habits, many people work with their backs bent forward. In addition, if you lean back on the chair back to rest for rest, most chairs are designed to prevent the backrest from supporting the lumbar region, which will give a lot of pressure to the lumbar region.

In view of these problems, a number of prior arts have been proposed, and the following will outline the prior art.

Attached Figure 1 shows the operating state of the "chair" of the Republic of Korea Utility Model Registration No. 336016, and has a lower support 60 to which the seat 30 is coupled as shown in the lower support 60 It was a technology consisting of a torsion spring 80 as the upper support 50 and the elastic coupling means rotatably coupled by a hinge shaft 102 formed in the upper end.

The technology has a structure that the upper support 50 can be rotated and lying down when the user leans back from the sitting position, but there is a disadvantage that the upper support 50 cannot be fixed. In addition, from the structural point of view, it can not support a large load, the durability is low, and thus there is a limit to be applied to such things as expensive office chairs.

On the other hand, in the case of a general chair is composed of a leg portion, a seat portion and a back portion, the back portion is formed high in the upper, there is a problem that the packaging is not easy in storage or transportation and takes up a lot of volume.

1. Republic of Korea Utility Model Registration No. 336016 (December 3, 2003) 2. Republic of Korea Patent No. 946664 (March 3, 2010)

Therefore, in the present invention, the backrest angle of the chair can be easily adjusted and the backrest can be completely laid down as needed to provide convenience in storage or transport.

The present invention for achieving the problem as described above, the rotary shaft and the displacement shaft is provided on the left and right sides of the backrest, the housing is provided with a rotary shaft connecting hole to which the rotary shaft is coupled, and formed in the housing and connected to the displacement shaft and straight A chair having an adjustable angle of backrest comprising a displacement bundle including a movable block for sliding movement and a locking means for selectively fixing the position of the movable block, wherein the rotating shaft is connected to the outer shaft through the connecting shaft connecting hole outside the housing. The chair is inserted to be connected to the backrest, and when the backrest is folded horizontally, the rotating shaft can be removed by removing the chair from the outside of the housing.

Preferably, the rotating shaft is provided with an O-ring groove to which the O-ring is coupled, and when the O-ring is compressed through the rotating shaft connecting hole, the O-ring is compressed and then restored to its original state when passing through the engaging jaw formed at the end of the rotating shaft connecting hole. It proposes a chair capable of adjusting the backrest, characterized in that formed.

Preferably, the displacement unit, the movable block moving along the sliding groove in the housing, one end is connected to the movable block, the other end is formed in the form of surrounding the support shaft is a screw thread is formed on the outer surface fixed to the movable bar And a resilient material inserted into an outer surface of the movable bar, a movable gear coupled to a thread of the movable bar and having a gear tooth formed therein, and a gear portion engaged with the movable gear and protruding outside the housing in connection with the gear portion. It includes a control unit made of an adjustment lever, the elastic material is a chair capable of adjusting the backrest, characterized in that any one of a spring, a rubber material, a pneumatic spring.

Preferably, the locking means includes a lock switch that is bent in a b-shape, one end of which protrudes out of the housing, and is rotatable; A lock block provided with a fitting groove fitted to the other end of the lock switch and having a tooth portion engaged with the movable block; It proposes a chair capable of adjusting the back angle, characterized in that it comprises a; a support for elastically supporting the lock block.

Chair according to the present invention can freely adjust the backrest angle to relax and can support the lumbar spine can prevent back diseases, there is also an effect that can reduce the cost of transportation or storage.

1 is a state diagram for the "chair" of the Republic of Korea Utility Model Registration No. 336016 in the prior art.
Figure 2 is a side view of the main part of the chair capable of adjusting the backrest angle configured in accordance with a preferred embodiment of the present invention.
Figure 3 is a side view showing a state in which the backrest is folded horizontally.
4 is an exploded perspective view of a main part;
5 is a perspective view of an assembled state for the main part.
6 is a schematic cross-sectional view of the axis of rotation;
Fig. 7 is a sectional view of still another possible example of a rotating shaft.

Hereinafter, a more specific embodiment based on the technical spirit of the present invention will be described, and reference will be made to the accompanying drawings as a means for understanding. The accompanying drawings show one example that can be implemented according to the technical idea of the present invention, and thus the scope of the present invention is not limited to the drawings.

Figure 2 is a side view of the main part of the chair capable of adjusting the backrest angle configured in accordance with a preferred embodiment of the present invention, Figure 3 is a side view showing a state in which the backrest is horizontally folded, Figure 4 is an exploded perspective view of the main part 5 is a perspective view of an assembled state of the main part, FIG. 6 is a schematic cross-sectional view of the rotating shaft, and FIG. 7 is a cross-sectional view of another possible example of the rotating shaft.

As shown, the chair capable of adjusting the backrest according to the present invention is provided with a rotation shaft 110 and a displacement shaft (not shown) on the left and right sides of the backrest 100, and the rotation shaft connecting hole 210 to which the rotation shaft 110 is coupled. And a displacement bundle 300 including a housing 200 provided therein, a movable block 310 formed in the housing 200 and connected to the displacement shaft and linearly sliding. It comprises a locking means 400 for selectively fixing the position. The housing 200 may be divided into a housing body 200a and a housing cover 200b.

Particularly, in the present invention, the backrest 100 can be maintained at an arbitrary angle through a displacement axis for adjusting the angle of the backrest, and the backrest can be completely folded and laid horizontally by using the rotation shaft 110. There is a characteristic.

The rotating shaft 110 is inserted to be connected to the backrest 100 through the rotating shaft connecting hole 210 from the outside of the housing 200, and when the backrest 100 is horizontally folded, the rotating shaft 110 is The housing 200 has a structure that can be separated by pulling out.

When the rotary shaft 110 is inserted through the rotary shaft connecting hole 210, the rotary shaft 110 is connected to the backrest 100 so that the backrest 100 can be rotated. When the rotation shaft 110 is removed, the backrest 100 is connected to the housing 200 only through the displacement shaft. In this case, the displacement shaft functions as the rotation shaft.

In the present invention, the rotary shaft 110 may be inserted through the rotary shaft connecting hole 210 from the outside of the housing 200 so as to be connected to the backrest 100. In contrast, the rotary shaft 110 connected to the backrest 100 may be connected to the housing ( 200) It is easy to fold the backrest 100 by removing it from the outside.

On the other hand, the rotary shaft 110 should not be pulled out of the rotary shaft connecting hole 210 in a situation that the user does not intend. That is, since one rotary shaft 110 is inserted through the rotary shaft connecting hole 210 and connected to the backrest 100 at both left and right sides of the backrest 100, the rotary shaft 110 little by little when used for a long time. There is a possibility of falling out. For this reason, no matter how precise the manufacturing or assembly of the backrest, errors can occur, and it is asymmetrical to each rotation axis on both sides of the backrest in the process of frequently changing the angle of the backrest or leaning on the backrest. Because it takes strength.

Therefore, in order to prevent the rotary shaft 110 from being inadvertently removed from the rotary shaft connection hole 210, the O-ring groove 111 to which the O-ring (O) can be coupled is formed on the rotary shaft 110. 6 is a schematic cross-sectional view of the rotary shaft, and the O-ring groove 111 is provided near the middle of the rotary shaft 110, and the rubber O-ring O is placed on the O-ring groove 111. Insert it.

When the rotary shaft 110 is inserted through the rotary shaft connecting hole 210 in the state in which the O-ring O is coupled to the O-ring groove 111, the O-ring O is compressed to the rotary shaft connecting hole 210. When inserted and reached the end of the rotary shaft connecting hole 210, the O-ring (O) is restored to its original form again. A locking jaw 220 is formed at an end of the rotation shaft connecting hole 210, and the O-ring O is decompressed when passing through the locking jaw 220 and restored to a circular shape.

When the O-ring (O) coupled to the rotary shaft 110 passes through the engaging jaw 220 of the rotary shaft connecting hole 210, the O-ring (O) is larger than the inner diameter of the rotary shaft connecting hole 210. O) acts as a stopper so that the rotating shaft 110 does not fall easily in a situation that the user does not intend.

Of course, when the user pulls out the rotary shaft 110 by applying an external force, the rotary shaft 110 and the O-ring (O) may be pulled out again through the rotary shaft connection hole 210 together.

And more preferably, the left end portion of the rotary shaft 110 is formed to have the largest diameter than the other portion, this portion is to be called the head 112. It is inserted into the rotary shaft connecting hole 210 from the opposite end of the head 112, the head 112 is coupled to be caught to the front end of the rotary shaft connecting hole 210 formed in the housing 200. The reason why the head 112 is placed on the rotating shaft 110 is that when the user uses the chair in a state in which the rotating shaft 110 is coupled, the rotating shaft 110 is connected to the rotating shaft 110 when the user opens the handle of the chair. ) To prevent deviation from

On the other hand, Figure 7 shows another possible example of the rotation axis.

The main feature of the present invention is to allow the rotating shaft 110 to be assembled or separated from the outside of the housing as needed, and another possible embodiment is a first ball stopper method or a fixed bolt method.

As shown, the ball stopper method is provided by a ball (B) that is supported by the spring on the outer surface of the rotary shaft 110, the rotary shaft connection hole 210 restrained by placing a ball groove (not shown) that the ball can be caught This means to be generated. And the fixed bolt method forms a bolt hole (not shown) connected to the rotation shaft connecting hole in the housing with a recessed portion (G) formed in a circle on the outer surface of the rotating shaft 110 to fill the bolt (not shown) Is inserted into the recessed portion to be fixed.

The present invention is basically capable of adjusting the angle of the backrest, and comprises a backrest 100, a rotating shaft 110, a displacement shaft, a housing 200, a displacement bundle 300 and a locking means 400 and the like.

In particular, the displacement bundle 300 is movable block 310 moving along the sliding groove 240 in the housing 200, one end is connected to the movable block 310, the other end is threaded to the outer surface ( 321 is formed, the movable bar 320 is formed to surround the support shaft 360 is fixed, the elastic body 330 is inserted into the movable bar 320 outer surface, and the thread of the movable bar 320 ( A moving gear 340 coupled to the 321 and a gear tooth is formed, and a gear part 351 engaged with the moving gear 340 and connected to the gear part 351 to protrude out of the housing ( And an operation unit 350 consisting of 352.

In addition, the elastic body 330 may be any one of a spring, a rubber material, and a pneumatic spring, and in this embodiment, the spring is used. The elastic body 330 can be compressed by rotating and moving the moving gear 340 by using the adjustment lever 352, the minimum force that the user should apply to the backrest when tilting the backrest 100. It is to be determined, and also when the upright inclined backrest also serves to easily return to the repulsive force of the elastic body.

Rubber material may be used as the elastic body, and the pneumatic spring may be generally used such as a pneumatic cylinder.

The locking means 400 in the present invention is preferably configured to include a lock switch 430, a lock block 440 and the support 450. The lock switch 430 has an approximately C shape as shown and is coupled to be rotated with respect to the housing 200 and one end protrudes out of the housing. Both sides of the lock switch 430 are provided with a protruding pivot shaft 431 for a pivoting operation, and the pivot shaft is rotatably supported inside the housing 200.

A tooth block 312 is provided on one side of the movable block 310 and the lock block 440 having another tooth 441 engaged with the tooth 312 of the movable block 310 is movable. It is arranged to face the block 310. In addition, the lock block 440 is provided with a fitting groove 442 into which the other end of the lock switch 430 may be fitted, and the lock block 440 is operated by the operation of the lock switch 430. 310 may be combined or separated.

In addition, the lock block 440 is supported by the support 450 and the support 450 is like a spring, the support 450 is located between the housing 200 and the lock block 440 is the lock block The pressure 440 is maintained to the movable block 310 side. Therefore, in order to release the coupling between the movable block 310 and the lock block 440, the support switch 450 is compressed and the movable block is rotated by retracting the lock block 440 by rotating the lock switch 430. The engagement with 310 is released. However, when the force applied to the lock switch 430 is removed, the support 450 extends as it is, and pushes the lock block 440 to be coupled to the movable block 310.

As described above, the chair capable of adjusting the backrest of the present invention can be easily detached from the rotating shaft to horizontally fold the backrest as necessary to minimize the space during transportation or storage, and the position can be more easily fixed when the backrest is adjusted.

The present invention can be applied to a variety of chairs, including general office chairs in practice, the industrial applicability is high.

100: back 110: axis of rotation
111: O-ring groove 112: Head
200: housing 200a: housing body
200b: housing cover 210: rotation shaft connecting hole
220: locking jaw 240: sliding groove
300: displacement bundle 310: movable block
320: movable bar 321: thread
312: teeth 330: elastic body
340: mobile gear 350: operation unit
351: gear unit 352: adjustment lever
360: support shaft 400: locking means
430: lock switch 431: rotating shaft
440: rock block 441: teeth
442: fitting groove 450: support
O: O-ring G: Recess
B: ball

Claims (4)

A displacement bundle including a rotation shaft and a displacement shaft provided on left and right sides of the backrest, a housing having a rotation shaft connection hole to which the rotation shaft is coupled, and a movable block formed in the housing and connected to the displacement shaft to linearly slide; In the chair capable of adjusting the backrest angle consisting of locking means for selectively fixing the position of the movable block,
The rotating shaft is inserted to be connected to the backrest through the rotating shaft connecting hole from the outside of the housing, and when the backrest is horizontally foldable, the rotating shaft can be pulled out from the outside of the housing to be separated. chair. The method of claim 1,
The rotation axis is,
The O-ring is provided with an O-ring groove is coupled to the O-ring is inserted through the rotary shaft connecting hole when the O-ring is passed through the engaging jaw formed in the end of the rotary shaft connecting hole is restored to its original feature to form a coupling The chair can adjust the angle of the back. The method of claim 2,
The displacement bundle, the movable block moving along the sliding groove in the housing, one end is connected to the movable block, the other end is formed in the form of a screw thread formed on the outer surface surrounding the support shaft is fixed and fixed, and An elastic lever inserted into the outer surface of the movable bar, a movable gear coupled to the screw thread of the movable bar and a gear tooth formed therein, and a gear portion engaged with the movable gear and connected to the gear portion to protrude out of the housing. To include an operation unit consisting of,
The elastic member is a chair capable of adjusting the angle of the backrest, characterized in that any one of a spring, a rubber material, a pneumatic spring. The method according to any one of claims 1 to 3,
The locking means,
A lock switch which is bent in a b-shape and protrudes outward from the housing and is rotatable;
A lock block provided with a fitting groove fitted to the other end of the lock switch and having a tooth portion engaged with the movable block;
A chair capable of adjusting the backrest angle, comprising: a support for elastically supporting the lock block.

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