KR101722316B1

KR101722316B1 - Chair of Move Back

Info

Publication number: KR101722316B1
Application number: KR1020150082213A
Authority: KR
Inventors: 박영호
Original assignee: 박영호
Priority date: 2015-06-10
Filing date: 2015-06-10
Publication date: 2017-03-31
Also published as: KR20160145459A

Abstract

A chair backrest including a guide shaft 10 fixed to the seat back and back direction with respect to the seat back and a mover moving in the back and forth direction of the seat in association with the guide shaft are formed on the chair seat or the chair frame.
The left and right lower ends of the backrest structure 2 for supporting the back plate 1 of the backrest are coupled to the mover.
The mover (6) also includes a stopper (3) coupled to move in the left and right direction of the chair. The guide shaft 10 is formed with a sawtooth shape and the stopper 3 is formed with a saw tooth shape coupled with a sawtooth formed on the guide shaft 10 so that the stopper The guide shaft and the teeth formed on the stopper are engaged or disengaged from each other by rotating the shaft about the right and left axes. So that the back and forth movement of the backrest can be interrupted.

Description

{Chair of Move Back}

The present invention relates to a chair in which a backrest is shifted forward and backward so that a worker sitting on a chair can tilt his or her posture forward or backward, or move back and forth around a chair seat and sit comfortably.

Figure 1 shows the first prior art that is configured to allow the backrest to move. The drawing shows Japanese utility model application publication no. 45-20210 (filed date 1966.7.23). This way, when the back is up and down, but when you are backing up, you have to lean against your back to get your butt off the seat. It can not sit because it is off the seat. I can not write at all.

Thereafter, a method of making the U-shaped bottom of the back of the back, such as KR 20-0448295, was filed as an improved method. However, this method can not be practically used because it becomes a strange form with protrusions at the rear of the chair.

A method of installing a guide rail on both sides of the seat so as not to protrude rearward has been proposed as in JPA_1999113674 and has become mainstream.

On the other hand, in a method of fixing the movement of the backrest, various methods for pinning and fixing the pins have been filed. JPA_1999113674 suggests a method in which the backrest does not protrude rearward. However, this also mentions that the backrest can be fixed by pin-fitting without any specific configuration. The patent is a function of locking the backrest received.

A configuration in which the pins are fixed in the same manner as that shown in KR 20-0448295 in Korea afterwards is a fixed method.

That is, in the history of the invention in which the backrest moves back and forth, the backrest is configured to protrude rearward, and the backrest moves to both sides of the seat.

At this time, the method of fixing the moving back is a method of fixing the pin by fixing the pin, which is a reliable method in that it can secure the certainty of fixation. However, inserting a pin into a discontinuously spaced hole requires adjustment, and a clicking sound is inevitable when connecting and disconnecting. In addition, the positions where the pins are inserted are provided on the left and right sides, respectively, or on both sides.

If the fixing pin is configured only on either the left or right side, there is a phenomenon that the unfixed side is pushed when the backrest is tilted. However, it is very annoying to install it on both sides and operate each.

In order to remedy these inconveniences, I have made a series of inventions such as 10-1103154 and 10-1092785, 10-1243018 and so on. This is basically a fixed method using friction. It is thought that by adjusting the roughness of the surface, sufficient fixing force can be obtained even with a small force. A cam or screw was used as a means of actuating the clamping force, and a contact pad was interposed to adjust the contact surface to reduce wear. However, in the case of assuming to move and fix frequently in the process of prototyping, wear and tear of abutment and screw used as the connection and disconnection mechanism to get friction and abrasion of contact surface were serious.

Thus, the present invention provides an invention which is easy to fix and does not have a problem such as abrasion.

When studying or studying in front of a desk, the worker approaches the upper part of the workbench, and the back of the chair falls off the back of the worker. Therefore, the worker who is not supported by the backrest becomes unstable and fatigued over time. Although attempts have been made to cope with this condition as mentioned above, there is no practicality due to incomplete use and inconvenience in use or not in practical use. Overcoming these shortcomings, I have invented a series of inventions.

However, it was considered that there was difficulty in ensuring sufficient durability due to the worn parts used in the preceding invention of the prototype during the manufacturing process. Therefore, it is desirable to invent a method that can escape the problem of abrasion inherently while maintaining convenience and certain certainty.

The chair on which the backrest moves includes a guide shaft 10 fixed to the seat in the back and forth direction with respect to the seat, and a mover moving in the front-back direction of the seat in association with the guide shaft, The left and right lower ends of the backrest structure 2 for supporting the back plate 1 of the backrest are coupled to the mover 6. [

The guide shaft 10 is formed with a saw tooth shape, and the mover includes a stopper 3 coupled to rotate in the left-right direction of the chair in the axial direction. The stopper 3 is formed with a saw tooth shape so as to engage with a saw tooth formed on the guide shaft 10. The stopper 3 rotates about the guide shaft 10 and the stopper So that the forward and backward movement of the backrest can be controlled by joining or dropping the teeth.

A saw-tooth shape is formed on the guide shaft 10 formed on both left and right sides of the chair seat plate or the chair frame which is a fixed portion. The stopper 3 constituting a saw tooth shape to be engaged with a saw tooth formed on the guide shaft 10 simultaneously contacts the tooth shape formed on the guide shaft 10 by the rotation as the stopper 3 rotates So that the back and forth movement of the back can be interrupted.

The guide shaft 10 is formed in the middle of the chair seat plate or the chair frame which is a fixed portion. The guide shaft 10 is formed with a saw tooth shape. The stopper 3 constituting a saw tooth shape to be engaged with a saw tooth formed on the guide shaft 10 rotates the stopper handle 8 formed at the end of the stopper 3 to rotate the guide shaft 8 10 of the backrest by engaging or disengaging with the serrations formed on the backrests.

The stopper 3 includes a U-shaped projecting shape as viewed from the side, a bracket (stopper guide cover) for supporting the rotation of the stopper, and a curved shape including a U- The guide shaft 10 and the stopper 3 can be engaged or disengaged in accordance with the rotation of the stopper 3 even if the position of the stopper 3 is configured in the middle of the mover.

Fixation of the backrest movement is achieved by engaging a saw tooth formed on the guide shaft 10, which is a fixed portion, with a saw tooth formed on the stopper 3 coupled to the mover coupled with the backrest. The stopper 3 is coupled to a bracket (stopper guide lid 20) provided on the mover 6 so that the direction of the shaft is configured in the left-right direction of the chair.

The releasing of these engagements is achieved by rotating the handle 8 of the stopper 3 to release the sawtooth joint formed on the guide shaft 10 and the stopper 3. [ As a result, the backrest coupled to the mover 6, which is engaged with the guide shaft 10 and can move in the front-back direction of the chair along the guide shaft 10, can move freely forward and backward along the guide shaft 10 do.

When the stopper 3 and the stopper 3 are combined with the form of the teeth formed on the guide shaft 10, the engagement is temporarily engaged over the entire saw tooth shape, and even when the stopper 3 is dropped, It works effectively against external forces. Therefore, the risk of breakage is greatly reduced.

These operations can fundamentally solve the wear-out problem in the prior art of the present invention because there is no part to be rubbed. Therefore, the problem of durability due to abrasion is solved.

In addition, compared with my prior art, the components to be operated can be minimized, so that the configuration is simple, and therefore, it is also economically advantageous.

Figure 1: An example of an early invention for a reclining movement
Fig. 2: Another example of a backrest moving invention
Fig. 3: perspective view of a simple stopper for fixing the backrest movement
Fig. 4 is a perspective view showing a stopper for fixing the backrest movement; Fig.
Fig. 5 is a perspective view showing the state where the stopper for fixing the backrest is released
Fig. 6 is an enlarged view of a portion where the tooth shape of the guide shaft and the stopper are engaged.
Fig. 7 is a perspective view showing a state in which the shape of the stopper is circular;
Fig. 8 is a perspective view of the intermediate guide shaft and the stopper.

The present invention will now be described in detail with reference to the accompanying drawings.

Figures 3-8 illustrate the configuration of a movable backrest.

Fig. 3 shows a state in which a simple stopper 3 is engaged with a saw tooth formed on the guide shaft 10. Fig.

Fig. 4 shows a state in which the stopper 3 is engaged with a saw tooth formed on the guide shaft 10. Fig.

Fig. 5 shows a state in which the stopper 3 is released from the saw tooth formed on the guide shaft 10. Fig.

6 is an enlarged view of a portion of the guide shaft 10 to which the saw tooth shape of the stopper 3 is coupled in order to observe it more clearly.

7 shows an example in which the shape of the stopper 3 is a shaft having a circular cross section.

8 shows an example in which the guide shaft 10 is constituted by one and the auxiliary guide shaft 101 is constituted for stability. Here, the front support table 14 is omitted from illustration in order to show the configuration.

The backboard (1) of the chair is coupled to a backrest structure (2) supporting the backboard (1).

The guide shaft 10 is fixed to the seat 15 or the chair frame, which is a fixed part of the chair, in the front-back direction of the chair. The guide shaft 10 is coupled with a mover 6 which is coupled with the guide shaft 10 and is movable in the front and rear direction of the chair.

The lower end of the backrest structure 2 is engaged with and supported by the mover 6.

A saw-tooth shape is formed in the lower portion of the guide shaft 10.

In the mover 6, a stopper 3 capable of rotating with the left and right direction of the chair in the direction of the axis is coupled. Thus, the portion of the stopper 3 coupled to the mover 6 acts as a rotating shaft at the time of rotation.

The stopper (3) is formed with a saw tooth shape to be engaged with a saw tooth shape formed on the guide shaft (10).

The position of the sawtooth shape formed on the guide shaft 10 can be formed at any portion of the guide shaft. However, there has been shown an example in which a problem of wear and aesthetics are formed in the lower portion of the guide shaft 10 as shown in the above-mentioned drawings 3 to 8 and so on.

The shape of the guide shaft 10 is a circular axis in the drawings of FIGS. 3 to 7, but may be a square, a pentagon, a hexagon, or the like; In the above-described drawings, the through hole is formed in the mover 6, but a part of the mover may be combined with the guide shaft 10 by making a part of the guide shaft 10 in the shape of a parser guide groove. You may.

In the drawings of FIGS. 3 to 8, the guide shaft 10 is constructed below the seat, which is one of the objects to be fixed, but it may be a fixed object even if it is not a seat. For example, it can be fixed to the chair frame below the seat.

8, only one guide shaft 10 may be provided in the middle of the seat plate, instead of constituting the guide shaft 10 on the left and right sides of the seat plate. In this case, Alternatively, the auxiliary guide shaft 101 may be further constructed to ensure stability. 8, the auxiliary guide shaft 101 is formed around the guide shaft 10. In this case, the mover 6, which is engaged with the guide shaft 10, It is preferable to form one long side to the left and right.

3, 4, and 6 to 8, when the chair user leans against the back and applies a rearward force to the backrest, the backrest 3 is brought into contact with the fixed guide shaft 10 by the stopper 3, It is not pushed backward.

The shape of the teeth formed on the guide shaft 10 and the stopper 3 to be engaged with each other may be a square shape, a shape that can be combined with a point of view such as a pentagon or a round shape, and the term "saw tooth shape" .

3, the rotation axis of the stopper is at a position smaller than the rotation radius. For this reason, the position at which the guide shaft 10 and the stopper 3 are engaged and fixed is performed at a position where the guide shaft 10 and the stopper 3 are already slightly rotated. It is seen that the position of the stopper handle of Fig. 3 is slightly rotated toward the backrest structure 2 side.

As a result, when the backward pressing force is applied to the backrest, this force acts as a force for rotating the stopper 3 counterclockwise as viewed in FIG. Since the rotation of the stopper 3 is at a position where the position of the guide shaft 10 engaging with the tooth shape of the stopper 3 is smaller than the rotation radius of the stopper 3, the rotation of the stopper 3 is prevented. As a result, the backrest is not pushed backward. On the contrary, if the backrest is pulled toward the front of the chair, there is no object to resist it, so that the stopper 3 can freely rotate.

Now, when the handle 8 of the stopper shown in Figs. 3 to 8 is pushed to the back of the chair, the contact portion of the stopper 3 with the guide shaft 10 is lowered downward in the drawing. This results in a state in which the tooth shape of the guide shaft 10 and the tooth shape of the stopper 3 are engaged. Therefore, in this state, the backrest can be adjusted to the front and back of the chair to be positioned at a desired position.

In use, the user can simultaneously hold the mover 6 or the backrest structure 2 by projecting the protruding portion of the mover downward while pressing the stopper 3. In this state, the backrest is moved to the front and rear of the chair You can place it anywhere you want.

When the stopper 3 and the stopper 3 are combined with the form of the teeth formed on the guide shaft 10, the engagement is temporarily engaged over the entire saw tooth shape, and even when the stopper 3 is dropped, It works effectively against external forces.

In the figure, a torsion spring is mounted at a position where the rotation shaft of the stopper 3 is supported, but the restoring force is applied. As an elastic material for restoring force, not only a torsion spring but also an elastic material such as a compression spring or an elastic block, which gives an elastic force, can be structured to be interlocked with the operation of the handle 8 to perform a restoring action.

In this way, when the force pressing the handle 8 of the stopper 3 is subsequently released, the stopper is restored to its original position by the restoring spring configured to resist the variation of the stopper 3. [ The stopper 3 itself can be simply placed under the load of the stopper 3 itself or at a position where the stopper is manually fixed again to the mover 6 without forming such an elastic material.

This causes the saw tooth shape of the guide shaft 10 and the tooth shape of the stopper 3 to be biased, and the motion of the back is fixed.

The elastic material may be constituted on one side or on both sides. Thereby, the stopper 3 can be returned to the home position by pressing either the left or right.

3 to 5 and 7, the shape of the stopper 3 is elongated in the left and right direction of the chair so as to be simultaneously engaged with the guide shafts 10 formed on the left and right sides. However, the stopper 3 may be formed on either side or on both sides. Figs. 3 to 5 and Fig. 7 show examples that are considered to be preferable.

As shown in Fig. 3, the shape of the stopper 3 can be a simplest shape including a U-shaped projection shape or a U-shaped projection shape as viewed from the front of the chair. However, in order to do so, a bracket (stopper guide cover 20) for fixing the stopper 3 to the lower or upward extension of the mover must be constructed. This may increase the spacing between the frame and the frame to support the seat, and may not be as good as the beauty.

For such a reason, a stopper having a curved shape is implemented as shown in Figs. 4 to 8. That is, the stopper 3 includes an ∩-shaped projection shape as viewed from the side, and a curved shape including a U-shaped projection shape as viewed from the front, thereby increasing the thickness in the vertical direction for mounting the stopper 3 And aesthetic and functional effects.

The above-described chair according to the present invention can be variously modified and embodied within the scope of the claims, the detailed description of the invention and the attached drawings, and is within the scope of the present invention.

The structure of the present invention is less prone to seeing the shape of the outer teeth compared with the previous inventions of the present invention, and when a force is applied before the engagement of the teeth is completed, there is a possibility that there is a gutter or a saw tooth shape is damaged Can be. However, the structure of the present invention is simple in structure compared with the previous inventions of the present invention, and is free from the problem of durability that was worried about in the previous invention because there is no part to be worn by combining with each other.

Although the advantages and disadvantages of the respective products can be obtained, the present invention is added to the present invention because the worry of durability is reduced in the actual merchandising process, easiness of production and economical efficiency arise, and it is thought that it is more advantageous for actual product launch.

1: back plate 2: backrest structure 3: stopper
8: (stopper) handle 31: restoring spring 6: mover
10: guide shaft 14: support base 15:
18: Bracket 20: Stopper guide cover 101: Auxiliary guide shaft

Claims

A guide shaft 10 fixed to the seat plate in the back and forth direction with respect to the seat plate and a mover 6 moving in the front and rear direction of the seat in association with the guide shaft, In a chair including a chair back,
The left and right lower ends of the backrest structure 2 for supporting the back plate 1 of the backrest are coupled to the mover 6 so that a saw tooth shape is formed on the guide shaft 10, And a stopper (3) coupled to rotate in the direction of the axis; The stopper 3 is formed with a saw tooth shape so as to engage with a saw tooth formed on the guide shaft 10. When the stopper 3 coupled to the mover 6 rotates, Wherein a backward movement of the backrest can be controlled by joining or dropping the teeth formed on the stopper.

The stopper (3) according to claim 1, wherein as the stopper (3) rotates, the saw tooth shape of the stopper is simultaneously brought into contact with the tooth shape of the guide shaft (10) formed on both left and right sides of the chair seat plate or the chair frame, So that the backrest can move in the forward and backward direction.

The stopper according to claim 1, wherein as the stopper (3) rotates, the saw tooth shape of the stopper is engaged or disengaged in contact with the saw tooth shape of the guide shaft (10) The backward movement of the backrest can be interrupted.

The stopper (3) according to claim 1, wherein the stopper (3) includes a U-shaped projected shape as viewed from the side and a curved shape including a U-shaped projected shape as viewed from the front side. And a backrest moving chair.