KR200226611Y1 - Chair to be capable of adjusting the angle of its back - Google Patents

Abstract

The present invention relates to a chair for adjusting the back, which can maintain the changed angle after freely changing the angle of the seat as well as the back of the chair, a leg including a caster, a lower bracket mounted on the upper center of the leg, and the following. In the ordinary chair composed of a back portion comprising a connecting portion consisting of an upper bracket connected to the bracket, a seat fixed and rotated on the upper side of the upper bracket, and a connecting table positioned at the rear of the seat and fixed to the lower bracket through a hinge axis. The angle of the lower bracket is changed inside the side wall through a lever protruding to the outside, and a rotating body having each rotating table formed thereon is mounted on the upper side of the lower bracket. One side is protruded and the locking end is formed at the rear A locking bracket is mounted, and a connecting shaft is mounted between the vertical stand and each swivel to change the angle of the locking bracket through the rotating body, and a locking end formed in the locking bracket in front of the connecting stand of the backrest. It is characterized in that the arc-shaped angle changer is formed with a plurality of tooth grooves can be inserted step by step.

Description

Backrest Chair {Chair to be capable of adjusting the angle of its back}

The present invention relates to a chair for adjusting the backrest, and more particularly, to a chair for adjusting the backrest so as to maintain the changed angle after freely changing the angle of the seat as well as the seat.

In general, a chair is composed of a leg including a caster, a seat mounted on the upper part of the leg and rotated, and a backrest mounted on the rear of the seat to change an angle. In particular, the backrest is marketed in an inclined state at a constant angle.

Therefore, in the case of using the chair configured as described above, the height between the leg and the seat can be freely adjusted, and when the user leans back, the angle of the backrest can be freely changed.

However, in the chair described above, the angle of the backrest is inclined at the time of shipment of the chair, which causes inconvenience to the user as the distance between the backrest and the back falls during work.

In addition, when taking a sleep while sitting in a chair, the angle of the backrest must be forcibly changed by using the power of the back and the waist, and the force of returning from the backrest is reversed, making it difficult to obtain a comfortable posture during sleep or rest. Had also.

In addition, even if the angle of the backrest is changed, the angle of the seat does not change, there was also a problem that gives the user uncomfortable.

In addition, as described above, if the angle of the backrest is repeatedly changed, the connection part connecting the seat and the backrest becomes loose, and thus the backrest does not return and maintains the back state, thereby reducing the life of the chair.

The present invention is designed to solve the above problems, by changing the angle of the backrest and the seat constituting the chair freely to maintain the changed angle, it is possible to make the back and the back completely in contact with the course of course Another object of the present invention is to provide a chair for adjusting the back, which can provide comfort to the user by preventing the back and the waist from generating power.

In addition, by setting the backrest at a constant angle, there is also an object that can maximize the life of the chair by preventing the connection between the seat and the chair is loose.

The present invention for achieving the above object, the bridge comprising a caster, the lower bracket is attached to the upper center of the leg and the upper bracket connected to the lower bracket, and fixed to the upper side of the upper bracket and rotated In the conventional chair consisting of a seat and a backrest including a connecting rod positioned at the rear of the seat and fixed to the lower bracket through a hinge shaft, the angle of the lower bracket protrudes from the inside of one side wall The upper part of the lower bracket of the lower part of the lower bracket of the lower bracket is mounted on the upper side, and the upper part of the lower plate is connected to each other so as to enable rotation, and the vertical side protrudes on one side and the locking end is formed on the rear side. A bracket is mounted, and the angle of the locking bracket is rotated between the vertical stand and each rotary table. The connecting shaft is mounted so as to be changed through a sieve, and an arc-shaped angle changer having a plurality of tooth grooves is mounted in front of the connecting rod of the backrest so that the locking end formed in the locking bracket can be inserted step by step. .

1 is a schematic cross-sectional view showing a chair according to the present invention.

Figure 2 is an exploded perspective view showing an enlarged main portion of the present invention.

3 is an enlarged view of a portion A of FIG. 1;

4 shows the operational relationship of the present invention,

Figure 4a shows the state before the angle change,

4B shows the state after the angle change.

Explanation of symbols for main parts of the drawings

1: leg

2 connection

21: lower bracket

22: upper bracket

221: connecting bracket, 222: hinge shaft

3: sheet

4: backrest

41: connecting rod

42: hinge axis

5: lever

6: rotating body

61: each turntable

611: shaft insertion hole, 611a: inclined portion

62: turning

63: angle limited axis

7: Locking Bracket

71: hinge axis

72: vertical stand

73: locking end

74: auxiliary bracket

8: connecting shaft

81: spring

9: angle changer

91: Chihom

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

1 is a schematic cross-sectional view showing a chair according to the present invention, when first described the configuration as follows.

A connection part 2 consisting of a leg 1 including a caster, a lower bracket 21 mounted on the upper center of the leg 1 and an upper bracket 22 connected to the lower bracket 21, and the upper bracket A backrest comprising a seat 3 fixed and rotated at an upper side of the 22 and a connecting table 41 positioned behind the seat 3 and fixed to the lower bracket 21 via a hinge shaft 42. In the ordinary chair composed of (4),

Inside the side wall 211 (see FIG. 2) of the lower bracket 21, the rotating body 6, the locking bracket 7, and the connecting shaft 8 can be maintained after changing the angle of the backrest 4. Is equipped with a locking means consisting of, the front of the connecting table 41 of the backrest is equipped with an arc-shaped angle changer (9) formed with a plurality of tooth grooves 91 so that the locking bracket 7 can be inserted step by step It is characterized by being.

In addition, the rear brackets of the upper bracket 22 are formed on both sides of the connecting rod 41 by connecting brackets 221 connected to each other via the hinge shaft 222, and when the angle of the connecting table 41 is changed, the seat is interlocked. As the angle of (3) is also linked to change it can provide the comfort of the chair.

2 is an exploded perspective view showing a part of the present invention in an enlarged manner, wherein the rotating body 6 is mounted inside one side wall 211 of the lower bracket 21 through a lever 5 protruding to the outside. The angle is changed and each rotating table 61 is formed at the top. And projections 62 are formed symmetrically on both sides of the outer surface of the rotating body 6 so as to define the rotation angle of the lever 5, the projections on both sides of the outer surface of the rotating body 6 An angle limiting shaft 63 in close contact with 62 is fixed to the lower bracket 21.

The locking bracket (7), which is mounted on the lower plate 212 front upper side of the lower bracket 21, each rotation is connected through the hinge 71 so that the vertical stand 72 is protruded on one side At the rear, the locking end 73 is formed so that the tooth groove 91 of the angle changer 9 fixed to the connecting table 41 can be inserted step by step. And, the upper side of the locking bracket (7) is to be additionally mounted to the auxiliary bracket (74) to prevent the locking bracket (7) from being separated from the lower bracket (21).

A connecting shaft between the vertical stand 72 of the locking bracket 7 and each rotary table 61 of the rotating body 6 to change the angle of the locking bracket 7 through the rotating body 6. (8) is to be mounted.

3 is an enlarged view of a portion A of FIG. 1, in which the front portion has a long hole shape and the rear portion has a circular shape at an upper portion of each rotating table 61 of the rotating body 6, and an inclined portion 611a is formed at an inner side thereof. The shaft insertion hole 611 is formed, and the connecting shaft 8 is inserted into the shaft inserting hole 611, and both sides of the connecting shaft 8 press the front and the rear of the respective rotating tables 61. The spring 81 is mounted so that the angle change state of the rotating body 6 can be maintained.

Reference numeral '10' denotes a 'lever' mounted on the other side of the connecting part to adjust the height of the leg.

Hereinafter, the automatic relationship of the present invention configured as described above is as follows.

Figure 4 shows the operational relationship of the present invention, will be described by dividing the case of using the chair for a job and the use for bedtime.

First, as shown in Figure 4a, when using the chair for the job, the backrest 4 should be kept in an upright position so that the back 4 can be in close contact with the back. Therefore, the locking bracket 7 is formed in the tooth groove 91 located at the upper side of the tooth groove 91 of the angle changer 9 fixed to the front of the connecting table 41 formed at the bottom of the backrest 4. The locking end 73 is inserted to show a fixed state. In other words, when used for a normal job, the backrest (4) is to maintain a substantially vertical state.

On the contrary, as shown in Figs. 2 and 4b, when the backrest is turned back and used for sleep or rest, first, the lever 5 mounted on one side of the connecting portion 2 is rotated in a clockwise direction to rotate the rotating body ( By moving the respective rotary tables 61 of 6) backward, when the connecting shaft 8 mounted on each rotary table 61 is moved backward, the locking bracket 7 connected to the front of the connecting shaft 8 ) Is rotated about the hinge shaft 71 and the locking end 73 of the locking bracket 7 is advanced, so that the locking end 73 is fixed to the front of the connecting rod 41. It is released from the tooth groove 91 of 9).

Thereafter, the backrest 4 is pushed to the back to gently adjust the angle, that is, the angle of the connecting table 41 is changed about the hinge shaft 42 mounted in the middle of the connecting table 41 of the backrest 4, and the When the lever mounted on one side of the connecting portion 2 is rotated in the counterclockwise direction, each of the rotating tables 61 of the rotating body 6 is rotated forward to the connecting shaft (8) mounted on each of the rotating tables 61 ) Is also moved forward. Therefore, the locking bracket 7 connected to the front of the connecting shaft 8 is rotated about the hinge shaft 71 so that the locking end 73 of the locking bracket 7 is backward, so that the locking end 73 is reversed. Is inserted back into the tooth groove 91 of the angle changer (9) fixed to the front of the connecting table (41).

That is, when the angle of the backrest 4 is gently adjusted as described above, the angle changer is mounted on the lower part of the backrest 4 so that the angle of the connecting table 41 is also changed and is fixed to the front of the connecting table 41. As 9 is protruded to the upper part of the locking bracket 7, as described above, the locking end 73 of the locking bracket 7 is the tooth groove 91 located at the lower part of the tooth groove 91 of the angle changer 9. ), It is possible to continuously maintain the back state of the back. In this case, the upper bracket 22 and the connecting table 41 are connected to each other, and thus the seat 3 may be linked to the backrest 4 so that the user may be comfortable as the angle is changed.

Therefore, the present invention enables the user to change the angle of the backrest as described above through the rotation of the lever 5 mounted on one side of the connecting portion 2 as necessary.

The present invention as described above, by changing the angle of inclination of the back of the chair and the seat freely to maintain the changed angle, it is to have the effect of maintaining the proper angle of the back according to the job or rest.

In addition, by setting the backrest at an angle to prevent loosening of the seat and the connection between the chair, there is an effect to provide a solid chair to maximize the life of the chair.

Claims (4)

A connection part 2 consisting of a leg 1 including a caster, a lower bracket 21 mounted on the upper center of the leg 1 and an upper bracket 22 connected to the lower bracket 21, and the upper bracket A seat 3 fixed to an upper side of the 22 and rotatable, and a connecting table 41 positioned behind the seat 3 and fixed to the lower bracket 21 via a hinge shaft 42. In the ordinary chair composed of the backrest 4, Inside the one side wall 211 of the lower bracket 21, the angle is changed through the lever (5) protruding outward, and the rotating body (6) having each rotating table (61) formed on the upper is mounted, The lower plate 212 of the bracket 21 is connected to the front of the hinge through the hinge 71 so that each rotation is possible, the vertical stand 72 is protruding on one side and the locking end 73 is formed on the rear (locking bracket ( 7) is mounted, and the connecting shaft 8 is mounted between the vertical stand 72 and each rotating table 61 so that the angle of the locking bracket 7 can be changed through the rotating body 6. In front of the connection table 41 of the backrest, an arc-shaped angle changer 9 in which a plurality of tooth grooves 91 are formed so that the locking end 73 formed in the locking bracket 7 can be inserted step by step is provided. The rear brackets of the upper bracket 22 are connected to both sides of the connecting table 41 via hinge shafts 222. Connecting brackets 221 for adjusting the chair back characterized in that formed. According to claim 1, On both sides of the outer surface of the rotating body 6, the projections 62 are formed symmetrically so as to define the rotation angle of the lever 5, the outer surface of the rotating body (6) Chair for adjusting the backrest, characterized in that the angle limiting shaft (63) in close contact with the protrusion (62) is fixed to the lower bracket (21) on both sides outside. The shaft insertion hole 611 of claim 1, wherein an upper portion of each rotary table 61 of the rotating body 6 has a long hole shape and a rear portion has a circular shape, and an inclined portion 611a is formed inside. Is formed, and the connecting shaft 8 is inserted into the shaft insertion hole 611, and both sides of the connecting shaft 8 press the front and rear of the respective rotating tables 61 to rotate the rotating body 6. Chair for adjusting the backrest, characterized in that the spring 81 is mounted to maintain the state of the angle change. The chair for adjusting the backrest according to claim 1, wherein an auxiliary bracket (74) is additionally installed on the upper side of the locking bracket (7) to prevent the locking bracket (7) from being separated from the lower bracket (21). .