WO2011155795A2

WO2011155795A2 - Chair

Info

Publication number: WO2011155795A2
Application number: PCT/KR2011/004274
Authority: WO
Inventors: 박영호
Original assignee: Park Youngho
Priority date: 2010-06-11
Filing date: 2011-06-10
Publication date: 2011-12-15
Also published as: JP2013528101A; EP2580992A2; CN102933119A; WO2011155795A3; US20130175839A1

Abstract

A chair of the present invention has a movable back which can support the back of a user even when the user bends his/her body forward or moves his hip forward on a chair seat. The chair uses a brake piece for reliably fixing the back of the chair, and the brake piece operates with small force at a predetermined point. The chair has left and right brake devices for preventing the back of the chair from being distorted and a connector for interlocking the left and right brakes through a single operation. The height and tilt of the movable back of the chair are adjustable in accordance with the body type and body position of the user. The chair has an elastic element for pulling the back of the chair forward so as to easily move the back of the chair. The chair has an additional back for supporting the back, upper portion and head of the user when the user bends his/her body backward to take a rest. The chair seat is tiltable to prevent the body of the user from sliding on the chair seat and provide the user with comfort. The chair of the present invention has springs for each tilt of the chair seat so that the chair seat operates smoothly and has a reliable brake device for fixing the chair seat at a tilted state.

Description

chair

The present invention relates to a variable chair that allows a worker sitting in a chair to support the body of the worker even when tilting the posture forward or backward, or moving to and fro the chair seat.

Workers who work in a chair have accumulated various fatigue, especially in the back over time in the posture has been proposed a variety of more effective methods for this. The main purpose is to optimize the shape of the backrest to the shape of the human body or to give the backrest an appropriate amount of elasticity, and in detail, various methods for the optimization of the elasticity and the shape optimization have been made. However, this method could not help at all when the chair worker leans forward or moves the hips forward of the seat, away from the back of the worker. This suggests a method of moving the backrest to the front and back of the chair, but the method of moving and fixing the backrest is very inconvenient, and the fixing device is also installed on either side of the backrest, causing the backrest to twist when the back is actually supported. It was.

Therefore, in order to prevent this, it was necessary to have a device for fixing the backrest movement on both sides of the movable backrest, but each operation is very inconvenient operation can not expect practicality at all, no practical application.

In addition, the proposed method of fixing the hole at regular intervals in the proper portion of the fixed body, and a device for fixing to be inserted into the hole using a pin on the part of the moving backrest has been proposed. Another method proposed by this method is made by direct friction of gum rotating about a fixed axis.

On the other hand, even in the operation of moving the backrest, it was burdensome when the size of the backrest was large because the movement of the backrest was always moved by the user's power.

In addition, the part supported by the backrest is slightly different from each other according to the body type, so the suggested method is the best way to adjust the height of the backrest. However, the work of adjusting the height of the backrest as described above had to be performed by the chair user leaving the chair and adjusting the height of the backrest separately. This was not comfortable enough for the user to lean forward or back.

On the other hand, when the seated person leans forward for work or the like, if the chair is a wheeled chair to move to the workbench as much as possible to support the back of the worker, or to insert a back cushion separately to maintain the back support It was. However, the supplementary back cushions may be separated and the thickness of the back cushions may not be able to actively cope with the gap between the backrest and the user.

Wheeled chairs are not sufficient for the case where the worker leans forward or moves forward of the chair seat, but this is somewhat resolved and responsiveness is very rapid.

Therefore, the chairs to which the backrest presented so far have not been provided for convenience beyond the wheeled chairs for various reasons as described above have not been commercially realized.

If the user is completely seated on the backrest for rest while sitting on a chair, the angle of the backrest is preferably tilted slightly back. For this purpose, the existing chairs were elastic and tried to cope with it. However, the force of elasticity is continuously restored to its original position, so the user has to consciously apply force against this force. In addition, unlike the backrest, the seat of the chair maintains the horizontal state, the user's body is pushed forward.

In addition, the user may not only lean forward by approaching the workbench, but also take an action of tilting the leg forward, because the movement may be a comfortable posture in the working process depending on the nature of the work. However, at this time, the seat plate was still fixed horizontally and did not respond to the worker's posture.

Some devices have been suggested to adjust the inclination of the seat slightly below the seat, but also for the purpose of rest or work, the tilt angle is not enough or the elasticity is not suitable for the user. It was not widely used.

The most active way to support the chair user's back to lean forward or move the hips forward of the seat is to move the backrest in response to the user's posture. However, in the realization, eliminating inconvenience in use was necessary for practical use.

The fixing method for the movement of the backrest of the pre- filed was made by drilling a hole in the proper part of the fixed body and having a device for inserting it into the hole by using a pin on a part of the moving backrest. This fixed position is made at regular intervals and the impact occurred when the pin is inserted and escaped. Another method proposed by this method is made by direct friction of gum rotating about a fixed axis. Such a method requires a large force to obtain a large friction force for fixing and a small frictional contact surface causes severe wear.

Fixing the backrest movement is preferably fixed at any desired position. The operating method of the brake to be fixed should be simple and reliable, and its durability should be guaranteed by not causing severe abrasion.

In order to prevent the backrest from being twisted by the operation of the brake on either side, the brake is required to operate equally from side to side, and the trouble of operation for this should not occur as another problem. In addition, the configuration of the added configuration should not be hindered.

In addition, since the movement of the backrest is always moved by the user's power, it may be a burden when the size of the backrest is large, and it is desirable to be able to operate with a small force in response to the movement characteristics of the human body.

Even when the user is moving forward or backward to support the back, it is desirable that the support of the backrest provides the best support for all parts of the user's body.

On the other hand, when the seated person leans forward for work or the like, it is desirable to have a mechanism that actively responds to the varying spacing between the backrest and the user, without the aid of such a detached or thickened backrest cushion.

The height of the backrest can be adjusted not only to adjust the height in response to the user's body shape, but also to be easily adjusted without the user leaving the chair.

In addition, when the user approaches the workbench and leans forward as well as tilts his / her legs, it is preferable that the seat plate also tilts forward at a predetermined angle to respond to the user's posture.

In this case, in consideration of the difference in the tilting torque when the user tilts the body backwards and forwards, it is preferable to configure the corresponding elastic force to respond differently.

For the user who wants to rest while sitting on a chair, the backrest is preferably tilted slightly backwards, and it is desirable to configure a mechanism to fix the tilt of the backrest so as not to give the user another stress due to the elasticity to return. It is desirable that the seat bevels back together so that the hips of the user are not pushed off the seat. At this time, it is necessary to configure a mechanism having a sufficient fixing force to the inclined torque.

In the device for fixing the backrest movement

The brake action is initiated by the operation of the "operating handle-the brake piece which is in close contact with the fixed body by the operation of the handle", and at this time, the surface roughness is formed so as to form a suitable friction between the brake piece and the fixed body which is operated by the brake. By adjusting it, it was possible to fix the movement of the backrest with a sufficient fixing force at any position even with a small force.

The brakes were configured to act on the left and right sides of the chair, and the left and right brakes were easily operated by one operation by configuring an interlocker that interlocks these left and right brake operations.

The height of the backrest can be adjusted to adjust the height to correspond to the user's body shape.

In order to facilitate the movement of the backrest, an elastic element having a tension force applied to the front end of the mover was constructed.

When the user's body leaned behind the chair, the backrest supporting the user's main part and its upper part was configured to cope with each other.

In the above configuration, in order to prevent the movement of the cooperator interlocking the left and right brake pieces to secure the space by mounting a cover at the bottom.

The brake pieces operated by the brake lever were moved to the left and right or up and down to be compressed to the fixed portion to fix the movement of the backrest.

When the seated person leans forward for work or the like, the backrest is rotatable to actively respond to the changing interval between the backrest and the user.

The back height adjustment mechanism can be configured to allow the user to easily adjust the height of the backrest without leaving the chair.

When the user tilts the chair backwards and forwards, the elastic forces of different sizes corresponding to the forces of different sizes are applied.

Corresponding elastic forces were coped with compression spring system and tension spring system, and each tension control mechanism was equipped.

When the user leans back against the backrest, the seat plate is also inclined to prevent the user's hips from being pushed and the brake mechanism is configured to have sufficient fixing force at any angle.

As the backrest moves, the backrest is in a position to support the back of the chair user who leans forward or moves the hips forward of the seat for work. The brake action is initiated by the operation of the "brake piece which is in close contact with the fixed body under operation of the operating handle-handle" for the fixing. At this time, the movement of the backrest can be fixed even with a small force by adjusting the surface roughness to form a suitable friction between the brake piece and the fixed body subjected to the operation of the brake. Therefore, the wear of the contact surface is significantly reduced as compared to the direct friction method simply relying on the strong frictional force of the cam, it can significantly extend the durability; Compared to obtaining a fixing force by penetrating the pin, it becomes possible to fix it smoothly without generating noise at any desired position.

This brake acting on the left and right sides of the chair prevents the phenomenon of twisting when the backrest is applied when acting on one side. In addition, by configuring the interlocker for interlocking the brake operation of the left and right sides, the operation of the left and right brakes is easily started in one operation so that the inconvenience of operating the brakes is not generated.

In the above configuration, the space is secured by mounting a cover on the lower portion so as not to interfere with the movement of the interlocker interlocking the left and right brake pieces. This can be used as a sedentary chair. In addition, by mounting a chair leg in the lower portion of the lower cover can be realized as a normal chair. Or it is possible to mount the chair body consisting of one support shaft to the lower cover is possible to configure the height adjustment device and the configuration of the wheeled chair.

By having a height adjustment function in the backrest can be appropriately supported according to the body shape of the chair user.

Since the movement of the backrest is always moved by the user's force, it can be a burden when the size of the backrest is large, and in order to be able to operate with a small force in response to the movement characteristics of the human body, a tension force is applied to the backrest forwarder. By constructing a working elastic member, the hassle of pulling the backrest forward is eliminated, and pushing the backrest back is not difficult because it can be pushed to the back of the human body to use great power.

When the user moves forward, the area that the backrest should support is mainly the lumbar region, and when the user retreats back completely, it is desirable to support the entire part of the user's back and the head. There is no. Therefore, it is designed to be independent of the backrest that moves the backrest, which is enough to support the thoracic region and the head of the user, so that the user supports all the back parts and the head of the user when the user wants to fully support the back with the back. This provides proper support not only when the backrest moves forward, but also when it moves backwards and the user takes a rest position.

On the other hand, when the seated person leans forward for work, etc., the backrest and other methods for actively responding to the changing gap between the backrest and the user, without the aid of such a detached or thickened backrest cushion By rotatably supporting the upper part of the backrest, the user's posture can be supported more and more.

In order to cope with the fact that the support part of the chair user varies according to the user's body shape and the user's motion, the height adjustment system of the backrest is made to respond. At this time, convenience is maximized by the configuration for enabling the height adjustment operation while sitting in a chair.

When a user who wants to rest while sitting in a chair leans back on the backrest, the seat is also inclined backward so that the user's hips are not pushed from the seat, thereby preventing slipping. This seat tilt function maximizes the user's convenience by allowing the seat plate to tilt forward at a predetermined angle to respond to the user's posture when the user approaches the workbench and tilts the body and legs forward.

In this way, when the seat plate is tilted forward or backward, the elastic force is different from the force of tilting forward and backward, so that the elastic force is also configured to correspond to each movement so that the elastic force is different, thereby providing comfort to the human body. . By placing the elastic element at the rear of the chair, the user's legs are free at the front.

Due to the elasticity to return to the seat's inclination, it is easily fixed by constructing a brake mechanism having a sufficient fixing force at an inclined angle to remove the restoring force of the backrest which gives another stress to the user, and is not affected by the restoring force. It gives comfort.

Figure 1: An embodiment including the entire configuration

2 is a perspective view of the movable backrest system including the left and right brake pieces on the auxiliary rails;

3 is an exploded view of the movable backrest system including the left and right close contact with the auxiliary rail.

4: Perspective view of the mobile backrest system and the height adjustment system including the left and right close contact brake pieces

Fig. 5: Rear perspective view of the movable backrest system and the height adjustment system including the left and right close contact brake pieces

6: Rear perspective exploded view of the mobile backrest system and the height adjustment system including the left and right close contact brake pieces

7: Front perspective view of the movable backrest system and the height adjustment system including the upper and lower contact brake pieces

Fig. 8: Rear perspective exploded view of the mobile backrest system and the height adjustment system including the upper and lower tight brake pieces

9 is a perspective view of the configuration including the tilt control device

FIG. 10: Part B detailed view of the tilt control device of FIG.

11 is an exploded view of a chair including a chair tilt control device installed in the chair structure;

12: Detail view of the compression spring set and the tension spring set mounted on the chair (equilibrium)

Figure 13: Exploded View of Compression Spring Set and Tension Spring Set

14: State diagram at the time of compression spring operation (compression operation state)

15: State diagram at the time of tension spring operation (tensile operation state)

16: Sloped fixed brake mechanism exploded view

An embodiment including the entire configuration of the present invention is shown in FIG. 1.

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

2 to 8 separately show up to the seat plate mounted with a movable backrest.

1 to 10 show a state including a mover 6 fixed to the guide rail 10 is installed on the body of the seat plate or chair to move the backrest in the front and back direction and coupled to the guide rail. The backrest includes a back plate 1 in contact with the user's body, a structure supporting the back plate 2, a mover 6 engaged with the structure, and a guide rail 10 for binding the mover to guide the movement of the mover. . The lower part of the upper structure 2 supporting the back plate and the upper part of the lower structure 5 are rotatably coupled back and forth by joints 3 penetrating two parts to form a joint. Connecting table 3 is connected to the left and right joints.

Among the through holes in the coupling portion of the superstructure 2 and the substructure 5 connected by the connecting rod 3, a screw is formed in one of the superstructure 2 or the substructure 5. It is coupled with a screw formed at both ends of the connecting table (3). At this time, the left and right screws preferably form threads in opposite directions to each other. Both ends of the connecting rod 3 form a stopper 4, which also serves as a handle. By turning the stopper 4, the left and right joint portions move in opposite directions along the connecting rods, so that the coupling portions of the upper structure 2 and the lower structure 5 are in close contact with each other.

At this time, when the contact surface of the coupling portion of the upper structure 2 and the lower structure 5 is in close contact with each other by the rotation of the stopper 4, the unevenness to the extent that can give a sufficient fixing force to the rotational force generated by the user supports do. The connecting rod 3 has a handle as an end of the stopper 4, and becomes a connecting pin connecting the upper structure 2 and the lower structure 5, and functions as an interlock interlocking the action of the left and right stoppers. This gives you the convenience of operating from either side. Rotation of the stopper 4 can be configured to be practically within 180 degrees, wherein the role of the screw is equivalent to the role of the cam. Therefore, in this case, the meaning of the screw includes the role and meaning of the cam.

Backrest structure lower part 5 is fitted into a through hole extending in the up and down direction to the mover 6 moving along the guide rail 10 to adjust the height up and down, and on the other side of the backrest structure of the mover 6 A stopper 16, which is a fixing means for fixing the shanghai copper, is installed and is fixed at a desired height by tightening the stopper 16. The stopper 16 may be screwed or may be due to friction by the use of a cam.

The guide rail 10 is fixed to the chair seat plate 15, and the seat plate and the lower body of the chair may be fixed to the seat plate 15 or the body of the chair in the case of a chair that does not change by being fixed integrally.

A brake, which is a fixing means for controlling the movement of the mover 6, is coupled to the mover 6.

2 and 3 are diagrams showing the movement of the backrest system including the left and right close contact brake pieces 7 on the auxiliary rails 11.

The auxiliary rail 11 is fixed to the chair seat or guide rail 10 body. The mover 6 is coupled to the brake piece 7 at the front and the auxiliary rail 11 passes between the brake pieces 7 to operate the brake lever 8 so that the brake piece 7 is the auxiliary rail 11. It is fixed by being crimped to. The contact surface of the auxiliary rail 11 and the brake lever 8 is formed with irregularities to increase the resistance to slipping during brake operation (marking is omitted in the figure). The brake lever 8 also acts on the other side by the influence of operating the brake lever 8 by the connecting table 9 which is an element for interlocking the left and right brake action.

The connecting rod 9 and the brake piece 7 are screwed together, and the screw joining the brake pieces 7 on the left and right side has a balanced force on the left and right sides, so that the screw is coupled to the left and right sides so as to resist the external torque that twists the left and right. Done. Since the auxiliary rail 11 is configured separately to form a brake frame in which the brake pieces 7 operate, the auxiliary rail 11 may have some flexibility due to the shape of the auxiliary rail 11, so that the brake may be absorbed by itself while absorbing the change caused by the brake operation. It is possible to ensure the brake action by making the contact between the pieces 7 work in a balanced manner.

4 to 6 is a configuration diagram including the left and right close contact in the brake system of the movable backrest. In FIGS. 4-6;

The brake piece 7 is bound to the left and right in front of the mover 6, and the upper end of the brake piece 7 is guided to the guide rail 10 to move back and forth like the mover 6. The connecting table 9 is bound through the brake piece 7 and the connecting table 9 and the brake piece 7 are screwed together. By combining the right type screw with the left type screw, the opposing brake pieces 7 can approach each other and come into close contact with or away from the fixed part. Herein, the fixed part refers to a part which does not move relative to the moving stator, and may be anything fixed to the seat such as a seat plate or a guide rail, or any part of a fixed chair body. That is, the end surface of the connecting table 9 is fixed to the brake lever 8 and the left and right brake pieces 7 are rotated in opposite directions by the rotation of the brake lever 8 so that they move in opposite directions. , The brake piece 7 is pressed against the guide rail 10, which is a fixed portion, to fix the movement of the mover 6. At this time, the contact surface of the brake piece 7 and the guide rail 10 forms an unevenness or roughness so as to obtain a sufficient support force not to be pushed when the user supports the backrest.

The operation of the brake lever 8 uses only a rotation smaller than half a wheel in practical use, and thus the operating portion of the screw acting on this rotation is the same as that of the cam. That is, even if the formation of the screw thread within 180 degrees the same operation, so the screw coupling includes the role and meaning of the cam. By using the same type of screw, any two brake pieces 7 can act as a brake.

4 to 6, the brake piece 7 is composed of four to expect a stable action effect, but any two can be omitted and the function is still the same. It is also preferable to use at least two brake pieces 7 for the stable brake function even though the brake pieces 7 function as one brake piece 7. 4 to 6.

7, 8;

The brake piece 7 is bound to move up and down in front of the protrusion side of the mover 6, and the upper end of the brake piece 7 moves back and forth like the mover 6 with a slight distance to the guide rail 10. . The connecting table 9 is engaged with the left and right movers. The contact portion of the brake piece 7 and the connecting table 9 forms a cam 17 on the connecting table 9 to make contact.

The end surface of the connecting rod 9 is fixed to the brake lever 8, and the rotation of the brake lever 8 is transmitted to the cams 17 formed on the left and right sides of the connecting rod 9, and the left and right brake pieces are acted upon by the cam 17. (7) is moved upward to compress the guide rail 10 which is a fixed portion to fix the movement of the mover (6).

At this time . The contact surfaces of the brake pieces 7 and the guide rails 10 form concave-convexities or roughnesses so as to obtain a sufficient supporting force not to be pushed when the user supports the backrest. 7 and 8.

The connecting table 9 functions to act as a connecting pin to couple the brake pieces 7 and to operate the brake pieces, and to operate the brake pieces 7 of the left and right brakes simultaneously. Therefore, the backrest is stably supported from side to side and effectively resists external torque, and the brake can be operated from both left and right, and provides a convenience of obtaining such a brake effect with one operation of one side.

By mounting the cover 14 in the lower portion of the seat plate as shown in Fig. 2 to 11 to ensure a space that the front and rear movement of the brake left and right connecting rod 9 is not obstructed. In addition, the cover can function as a legless chair in the state of FIG. 2 to FIG. 8 shown without the lower leg of the chair (chair substructure 92), wherein the cover 14 also serves as a support to the floor.

In addition, by including a chair leg (chair substructure 92) in the lower portion of the lower cover 14 can be realized as a normal chair. Or it is possible to mount a chair body consisting of a chair leg having one support shaft on the lower cover, it is possible to configure the height adjustment device and the configuration of the wheeled chair.

In order to facilitate the movement of the backrest, in particular to facilitate the forward pulling operation, the spring element, which is the elastic member 12, is bound to the stator 13 fixed to the front of the mover 6 and the front of the seat plate so that a tension force is applied. By constructing, the backrest is forced to move forward of the chair. This means that when the seated person is tilted or moved forward, the brake lever 8 is squeezed so that the backrest moves forward like the forward movement of the user by closely contacting the seated body by the tension of the spring element, which is the tensioned elastic member 12. The backrest is fixed to support the back of the seated occupant by actuating the brake lever 8 when positioned at an appropriate position.

On the contrary, if the seated person wants to move backward or move the position, when the brake lever (8) is released, the backrest can move freely. At this time, the backrest moves by pushing the backrest back to the seated body. When the brake lever (8) is operated to be fixed. In the above process, the operation of pushing the back back with the structural force of the human body can be easily performed.

When the user moves forward, the area that the backrest should support is preferably the lumbar region. However, when the user has fully retracted back, it is desirable to support the entire part of the user's back and the head, but such a backrest cannot satisfy such a desire at the same time. Therefore, the movable backrest is configured to be low and further configured at the rear of the backrest to move the backrest enough to support the user's thoracic region and the head (FIG. 1), when the user fully backs the back and supports the back of the user. Supporting the stomach and head provides proper support not only when the backrest moves forward, but also when moving backward and the user takes a rest position.

4 to 9 shows a height control system installed on the back plate (1).

6 and 8, the stator 101 fixed to the back plate 1 is coupled to the structure 2 so as to be movable up and down.

A portion of the structure 104 of the back height adjustment system is fixed to the back plate 1 by a stator 103 and an extended lower portion of the structure 104 is formed horizontally and in the middle, protrudes in a plate perpendicular to the axis. It has a fixing projection 106, the perforated surface of the portion projecting upward in the middle of the brake operating piece 105 is fitted into the horizontal portion of the structure 104, the horizontal portion of the structure 104 is the brake operating piece ( It becomes the guide of 105).

A spring 107 having an elongating force is inserted between the fixing protrusion 106 and the plate-like protrusion between the brake operating piece 105 so that both ends of the outer side of the brake operating piece 105 are extended to the backrest structure 2 by the extension force. The back plate 1 is fixed by acting to bite the formed irregularities (FIG. 4 to FIG. 9).

In order to adjust the height of the back plate 1, by grasping the handle protruding downward of the brake operation piece 105 so that the outer both ends of the brake operation piece are released from the backrest structure 2, the back plate 1 is released. The silver can be moved up and down along the backrest structure (2), and the height of the back plate (1) can be adjusted by applying a force up or down while holding the handle of the brake operating piece (105) and adjusting to the desired height. Then, by releasing the handle of the brake operation piece 105, the end portion of the brake operation piece is again engaged by biting into the unevenness (Figs. 4 to 9) formed in the back structure 2 by the restoring force of the spring 107. 1) is fixed.

The handle portion of the brake operating piece 105 is configured to protrude downward than the lower portion of the back plate 1, so that the chair user can perform the back height adjustment work as described above by leaving his or her hands without leaving the seat.

9 to 16 show the structure of the tilt control device mounted on the chair.

The chair seat plate has a horizontal structural element 91 of the chair undercarriage as a horizontal axis, and the seat seat support member 90 fixed to the seat plate cover 14 covering the lower part or the lower part of the seat can be rotated by being fitted on this axis. It is fixed to and supported. That is, the seat plate support member 90 is fixed to the seat plate cover 14 which covers the top of the seat bottom or the bottom of the seat and the bottom is fitted to the horizontal structural element 91 to enable the chair seat to rotate back and forth.

As a device for cushioning function and restoring to the original position against the inclination by the rotation of the chair, as shown in FIGS. 9, 10, and 11, the spring system corresponding to the front inclination of the chair and the inclination toward the rear is respectively provided. It is installed at the rear of the. By arranging them in the rear and leaving the front of the chair empty, it is possible to secure a space in which the seated legs can freely move.

The configuration and operating state of the chair is not inclined by the external force, so the chair is in an equilibrium state of horizontal stability and tilted backwards to operate the compression spring, and tilts forward to operate the tension spring. Each of them is described as follows.

[Compression Spring Equilibrium State (FIG. 9 to FIG. 12)]: Both ends of the spring installed by compression in the compression spring set have end portions at the upper end 71 and the lower plate 74 having a wide surface capable of supporting the spring. The restoring force of the spring is suppressed by the long linear expansion inhibiting connector 72 which is fixed and prevents the gap by binding and connecting the two plates. The upper portion of the expansion inhibiting connector 72 is coupled to the upper end portion 71 and the lower portion passes through the rotational support portion 58 of the body side of the spring system and is fixed in length by a nut 75 which is a release preventing means. When the chair seat is in a horizontal position without tilting forward or backward, the restoring force of the spring is in this state in equilibrium with no force applied to the seat.

[Compression spring operating state (FIG. 14)]: When the chair seat plate is rotated and tilted backward, the compression spring set operates to resist tilting. The process is as follows.

By the rotation of the seat plate, the compressive force acts on the upper end 71 of the compression spring assembly through the compression spring guide portion 70 attached to the seat plate, so that the spring receives the added compression force. By the way, the lower end of the expansion inhibiting connector 72 is configured to be freely projected downward through the rotary support 58 during compression to compress only the spring to give a restoring force.

At this time, the upper end of the tension spring set is fixed to the chair seat plate and the lower part is configured to allow the tension spring lower end 54 to freely pass through the hole drilled in the rotation support 58 with respect to compression, thereby not being affected by compression.

[Compression spring pressure adjustment method]: The spring pressure regulator 76 is coupled to the rotary support 58 and the screw is pushed up or down the lower plate 74 as the handle 77 proceeds to the upper or lower by pushing up or down Will be adjusted.

[Tension spring equilibrium state (FIG. 9 to FIG. 12)]: The spring installed by tensioning in the tension spring set is fixed to the upper end 51 and the lower end 54, and the narrowing between the two plates is the force adjuster 56 Is suppressed by the distance between the lower end of the spring (54) connected by the screw and the head of the gravity adjuster (56). If the seat is not tilted forward or backward, it is in this state of equilibrium with no force acting on the seat.

[Tension spring operating state (FIG. 15)]: When the chair seat plate is rotated and tilted forward, the tension spring set is operated to resist tilting. Due to the rotation of the seat plate, the tension force acts on the upper end 51 of the tension spring set through the tension spring part 50 and the rotation shaft pin 52 attached to the seat plate, and the attraction force adjuster 56 is connected to the rotation support part 58. The lower end of the spring fixed to the lower end portion 54 connected to the gravity adjuster 56 is prevented upward movement by the upward movement inhibiting element 55 connected to the gravity adjuster 56 and the screw is larger than the drilled hole is fixed , The upper end 51 coupled with the upper end of the spring is extended away from the head of the manipulator 56 gives the restoring force to restore to the original position.

At this time, the semi-circular projection of the upper end portion 71 of the compression spring set freely separates from the compression spring guide portion 70 attached to the seat plate so as not to affect the tension.

[Tension spring manpower control method]: Tension spring manpower control is to move the upward movement suppression element 55 first enough downward and then fix the rotation of the lower end 54 connected to the manpower adjuster 56 with a screw and the manpower adjuster handle ( 57) by adjusting the tension by turning up and down, the upward movement inhibiting element 55 is in close contact with the rotary support 58 after the adjustment.

Since the chair seat plate has a rotational movement, the rotation support part 58 of the spring system is rotatably coupled with the rotation coupling part 59 of the chair structure 92 to maintain a stable angle with respect to the restoring force of the tension spring and the compression spring. .

When the chair seat plate is tilted forward using the seated thigh and when tilted backward using the back and weight of the seat, the elastic force of the compression spring and the tension spring is applied differently in consideration of the difference in torque. For example, a small torque is applied when the seat plate is tilted forward, so that the spring force (here the tension spring) that resists this tilt is used a small one; When the seat plate is tilted backwards, a large torque is applied, so a spring force (here, a compression spring) that resists this tilt is used. Therefore, the compression springs and the tension springs, which are elastic elements, have different magnitudes of restoring force against change.

Fig. 16 shows the operating part of the brake mechanism for fixing the inclination of the seat plate.

Brake mechanism for fixing the inclination of the seat plate: The cam 85 is coupled to the bracket 86 configured in the brake case 84 through the rotation shaft 87. In the

brake pieces

81 and 120, the

guide portions

88 and 89 of the

brake pieces

81 and 120 are fitted into the through holes of the brake case 84 to react to the movement of the cam.

A circular brake frame 83 is fixed to the structure 92 as shown in FIGS. 9 to 11, and after the seat plate is rotated by a desired angle, the brake handle 82 is operated to the cam 85 fixed to the end of the brake handle. As a result, the

brake pieces

81 and 120 come close to each other and thus are pressed against the brake frame 83 sandwiched therebetween, and thus the seat plate is fixed at the desired inclination angle.

The brake frame 83 forms a circle so that it can correspond up to a significant inclination, and since it forms a circle with a significant radius, it can bear considerable torque against the rotation of the seat plate. The contact surface between the brake frame and the brake piece can improve the fixing force more effectively by forming the unevenness or adjusting the roughness.

The chair according to the present invention described above can be embodied in various ways within the scope of the claims and the detailed description of the invention, the accompanying drawings, it is within the scope of the present invention.

People who work, study, study, work, etc. sitting in front of a desk, workbench, etc. sitting in a chair constantly repeat their postures leaning forward or leaning backwards due to the nature of the work. At this time, the existing chairs did not give enough support in response to their postures, fatigue accumulated over time, reduced work efficiency, and attracted the wrong posture.

The present invention enables the best response to these changing body postures and is particularly suitable for them. The present invention can relieve their physical fatigue, help mental concentration, improve work efficiency, prevent various diseases caused by incorrect posture, can lead to correct posture can help rehabilitation from diseases caused by incorrect posture .

Claims

A chair including a guide rail fixed to the chair seat or chair frame in a forward and backward direction with respect to the seat plate, and a chair back movable in the front and rear directions of the chair, including a mover coupled to the guide rail and moving forward and backward of the chair. In

And a brake device for fixing the movement of the mover, and the brake device includes a brake piece that is compressed to a fixed portion of the chair by the operation of the brake lever and fixes the mover.
The chair according to claim 1, wherein the brake device includes a connecting table for operating the left and right brake levers in cooperation with the left and right brake levers.
The structure for supporting the backrest (2) according to claim 1 comprises a substructure (5) having an open end on both left and right sides, and the undercarriage (5) engages the upper and lower through-holes of the mover to move the backrest into the shanghai-dong. Chair characterized in that the height can be adjusted.
Chair according to claim 1, characterized in that it comprises a tensioned elastic member (12) formed by coupling both ends to the front and stator (13) of the mover (6) of the backrest.
The chair of claim 1 further comprising a non-moving backrest, independent of the movable backrest, behind the movable backrest.
Chair according to claims 1 to 5, including seat plate lower cover 14
The chair according to one of claims 1 to 5, wherein the brake piece (7), which has been operated by the brake lever, is pressed against the auxiliary rail (11) by a connecting table (9) to fix the movement of the backrest.
The chair according to one of claims 1 to 5, wherein the brake piece (7) actuated by the brake lever is fixed to the fixed part by a connecting rod (9) for interlocking the left and right operations of the brake piece to fix the movement of the backrest.
The brake piece (7) according to one of claims 1 to 5, wherein the brake piece (7) that has been operated by the brake lever is fixed to the brake piece (7) by a cam (17) formed on a connecting table (9) for interlocking the operation of the left and right brake pieces (7). The chair characterized in that the movement of the backrest is fixed by the vertical movement.
Chair according to one of the claims 1 to 5, characterized in that the upper structure (2) and the lower structure (5) of the backrest are rotatably coupled by a connecting table (3), and the backrest angle can be adjusted by the operation of the stopper (4).
The backrest of claim 1 to 5 has a height adjustment system for adjusting the height of the back plate 1 up and down, and the bottom of the back plate so as to grasp the handle portion protruding downward of the brake operating piece 105 even when the seated person is seated. A chair comprising a back height adjustment system, characterized in that more protruded downward.
A portion of the structure 104 of the back height adjustment system is fixed to the back plate 1 and an extended portion of the structure has a projecting portion 106 formed horizontally and fixed in the middle; A spring 107 is inserted between the brake operating piece 105 fitted along the structure on both sides of the protrusion, and between the brake operating piece 105 and the fixed protrusion 106; Chair including a height adjustment system, characterized in that the teeth formed to fit the irregularities formed in the backrest structure (2) on the outside of the brake operating piece (105).
The seat plate support member (90) of claim 1, wherein one end is fixed to the lower part of the chair seat plate and the other end is rotatably coupled to a horizontal structure element (91) formed in the left and right directions on the upper part of the chair structure;

Chair having an inclination adjusting device of the seat plate, characterized in that it has an elastic element (53, 73) that the elastic force of the different size acts corresponding to each when the seat plate is rotated forward or backward.
The method of claim 13, wherein the elastic element comprises a compression spring;

A spring pressure regulator 76 supporting the upper end 71 fixing the upper end of the compression spring and the lower end 74 fixing the lower end, and supporting the lower end 74 and being coupled to the rotation support 58; A linear expansion inhibiting connector 72 connecting the upper end 71 and the lower plate 74 and passing through the rotational support 58 without stopping, the lower end of which is composed of a separation preventing unit 75; A compression spring guide part 70 fixed to the seat plate and fitted with the upper protrusion part of the upper end part 71; And a rotation support part 58 rotatably coupled to the rotation coupling part 59 installed in the chair structure.
The chair of claim 14, wherein the pressure adjustment of the compression spring supports the bottom plate (74), and adjusts the elastic force of the spring by advancing forward and backward the pressure adjuster (76) screwed with the rotary support (58).
The method of claim 13, wherein the elastic element comprises a tension spring;

An upper end 51 fixing the upper end of the tension spring and a lower end 54 fixing the lower end thereof; A manipulator 56 for maintaining a spring gap between the upper end 51 and the lower end 54; A tension spring seat plate fixing part 50 rotatably connected to the upper end 51 and the rotating shaft pin 52 and fixed to the seat plate; A rotation support part 58 rotatably coupled to the rotation coupling part 59 provided in the chair structure; A chair comprising: an upward movement inhibiting element (55), which is screwed to the gravity adjuster (56) and is configured below the rotary support (58).
The method of claim 16 wherein the pressure regulation of the tension spring;

An upper movement restraining element 55 which is larger than the hole under the hole that supports the upper end 51 and allows the lower end 54 screwed with the force adjuster 56 to pass through without jamming. Chair), characterized in that to adjust the elastic force of the spring by moving forward and backward with the manpower adjuster (56) coupled to the screw.
The seat plate support member (90) according to any one of claims 1 to 5, wherein one end is fixed to the lower part of the chair seat plate and the other end is rotatably coupled to a horizontal structure element (91) formed in the left and right directions on the chair structure; A circular brake frame 83 formed in the chair structure concentrically with the rotation shaft 91 of the seat plate; And a brake mechanism installed on the chair seat plate to fix the rotation of the seat plate by acting on the brake frame (83).
The brake device of claim 18; A brake piece 81 fixed to a seat plate or a cover which is a fixed portion and coupled to the brake case; And a cam (85) for pressing the brake piece to the brake frame (83) by the action of the brake handle.