KR102273376B1 - Chair with a backrest with forward function - Google Patents

Abstract

The present invention relates to a chair having a backrest capable of moving forward, which comprises: a backrest; a first rear bracket with the lower end fixed to a seat plate located in the lower part of the backrest and the upper end having a first hinge piece; a second rear bracket with the upper end connected to the upper part of the backrest and the lower end having a second hinge piece connected to correspond to the first hinge piece, wherein the second rear bracket rotates backward or forward from the chair in the upper part of the first rear bracket in order to enable the upper part of the backrest to move backward or forward; and a movement control unit composed of a hinge shaft with the inner side connected to the center portion of the backrest and both ends which pass through the first hinge piece and are inserted into the second hinge piece to be fixed, wherein the movement control unit is connected to a gap between the lower part of the backrest and the front side of the first rear bracket to be able to shrink and extend in length, thereby enabling the lower part of the backrest to gradually move forward from the chair and move backward from the chair to return to an original position, so that the backrest can come in close contact with and support the back of the user regardless of body shape and posture of the user.

Description

Chair with a backrest with forward function

The present invention relates to a chair equipped with a back plate having a forward function, and more particularly, when the user grabs the lower part of the back plate and pulls it in the forward direction of the chair, the lower part of the back plate moves forward step by step and is in close contact with the user's back. It relates to a chair provided with a back plate having a function.

In general, a chair includes a seat plate on which the user sits, a leg supporting the seat plate, a back plate provided behind the seat plate to support the user's back, and a rear bracket for connecting and supporting the seat plate and the back plate. .

Conventional chairs have a structure in which the entire backplate is in close contact with the user's back due to its own elasticity.

However, while acknowledging that the conventional chair has a different body structure for each user, as a chair is manufactured by applying a standard body size for mass production and sales, the standardized conventional chair has a problem that the body type and posture do not match for each user. .

That is, when the user is seated in a chair, if the back plate is not in close contact with the user's lower back and cannot be supported, there is a problem in that fatigue is increased on the user's back.

Patent Registration No. 10-1980566 (Registration Date: May 15, 2019)

Accordingly, the present invention is to solve the above problems, and an object of the present invention is to provide a chair equipped with a backboard having a forward function that allows the lower part of the backboard to be closely supported on the user's back regardless of the user's body type and posture. will be.

The present invention for achieving the above object includes a back plate, a first rear bracket having a lower end fixed to a seat plate positioned under the back plate and forming a first hinge piece at the upper end, and the upper end is connected to the upper part of the back plate and a second rear bracket that forms a second hinge piece connected to the first hinge piece at the lower end and rotates in the front-rear direction from the upper part of the first rear bracket so that the upper part of the back plate moves in the front-rear direction of the chair; The inner side is connected to the middle part of the back plate, and it passes through the first hinge piece and is formed of a hinge shaft having both ends inserted and fixed to the second hinge piece, and a length extension is formed between the lower part of the back plate and the front surface of the first rear bracket. It is characterized in that it includes a movement control unit for the lower part of the back plate to move forward step by step in the front direction of the chair and to return by moving backward in the rear direction of the chair.

According to the present invention, the movement control unit includes a cylinder member having a rear fixed to the front surface of the first rear bracket and forming an open space in the front, and a connecting piece connected to the lower part of the back plate to rotate in the vertical direction in the front, A rod member that slides slidingly from the lower side of the space at the rear and a concave fixing groove is formed on the rear surface of the connection piece to move in the front and rear direction of the chair together with the lower part of the back plate, and the first is inserted and fixed in the fixing groove An elastic locking member that forms a first protrusion in the front and a second protrusion that slides from the upper side of the space at the rear and moves in the front-rear direction of the chair together with the rod member, and the locking member fixed at the upper side of the space a first guide member for guiding the second protrusion so that the chair moves forward step by step in the front direction of the chair and moves backward in the rear direction of the chair, and is fixed to the lower side of the space so that the rod member moves in the front and rear direction of the chair and a second guide member for guiding the slide.

According to the present invention, a hinge bracket that protrudes in the rear direction and is connected to a hinge pin inserted into the connecting piece is further formed on the lower portion of the back plate.

According to the present invention, a receiving groove into which the rear of the cylinder member is inserted is further formed on the front surface of the first rear bracket, and a flange portion fixed to the periphery of the receiving groove with a fastening screw is further formed on the rear periphery of the cylinder member. The rear of the cylinder member is fixed to the front surface of the first rear bracket.

According to the present invention, a hook protruding upward is further formed on the upper surface of the first guide member, and a hook engaging groove is further formed through the upper surface of the cylinder member in the vertical direction so that the hook is in the hook engaging groove. The first guide member is fixed to the upper side of the space portion by insertion and fixing, and concave-convex portions are further formed at both ends of the first guide member and the second guide member, respectively, so that the second guide member is formed in the concave-convex portion of the first guide member. The concave-convex portion of the member is engaged and fixed, and the second guide member is also fixed to the lower side of the space portion of the cylinder member.

According to the present invention, the first guide member has a first guide groove guiding the second protrusion of the locking member so that the forward movement of the back plate starts in the front direction of the chair is formed in the rear of the inner surface of the first guide member inclined to the side of the chair, A second guide groove connected to the first guide groove is formed on one side of the inner surface and is dug in the front and rear direction of the chair to guide the second protrusion of the locking member so that the back plate moves forward only in the front direction of the chair, the second guide On one side of the groove, a first step groove, a second step groove, and a third step groove are formed in which the second protrusion of the locking member is inserted and detached in stages so that the forward movement distance of the back plate is adjusted by sequentially digging inclined in the chair side direction, respectively. A third guide groove which is further formed, connected to the second guide groove in front of the inner surface and is inclinedly dug to guide the second protrusion of the locking member so that the back plate is switched from forward movement to backward movement, is further formed, the inner surface The second protrusion of the locking member is connected to the third guide groove and the first guide groove on the other side and is dug in the front and rear direction of the chair to guide the second protrusion of the locking member so that the back plate moves backward in the rear direction of the chair and returns to the first guide groove. 4 It is characterized in that the guide groove is further formed.

According to the present invention, the connection section between the second guide groove and the third guide groove protrudes in a hemispherical shape to control that the second protrusion of the locking member enters the third guide groove from the second guide groove. It is characterized in that an elastic stopper is further formed.

According to the present invention, on both sides of the fixing groove of the rod member, a rotation preventing mechanism for supporting the first protrusion of the rod member that protrudes in the upper direction and is inserted into the fixing groove from rotating in the lateral direction of the chair is further formed. characterized.

According to the present invention, a plurality of through-holes penetrating in the vertical direction are further formed on the inner surface of the second guide member, and an elastic support portion extending to support the slide is further formed at one side of the inner side of the through-hole.

According to the present invention, it is characterized in that a plurality of concave grooves are further formed on both sides of the rear surface of the back plate to increase the curvature in the lower part of the back plate, which is recessed at intervals and moves in the front and rear direction of the chair.

According to the present invention, the connection between the upper part of the upper part of the back plate and the upper end of the second rear bracket is formed with a coupling groove recessed inside the upper part of the back plate, and a coupling protrusion inserted into the coupling groove at the upper end of the second rear bracket It is characterized in that it is formed and connected.

According to the present invention, the middle part of the back plate is further formed with a hook that protrudes backward so that the middle part of the back plate is hung inside the hinge shaft so that the middle part of the back plate and the first rear bracket are connected. .

According to the present invention, it is characterized in that a lumbar support is further formed on the front surface of the middle part of the back plate to be detachably fixed to support the lumbar spine of the seated person.

As described above, in the present invention, when the user grabs the lower part of the back plate and pulls it in the forward direction of the chair, the lower part of the back plate moves forward step by step in the forward direction to closely support the user's back, and then the user moves the back plate to the front of the chair. When pushed in the direction, as the lower part of the back plate moves backward in the rear direction of the chair and returns to its original state, there is an effect that the lower part of the back plate can be closely attached to and supported on the user's back regardless of the user's body shape or posture.

In addition, the present invention connects the first rear bracket, the second rear bracket, and the rotation control unit with a hinge shaft, hooks the hook of the middle part of the back plate to the hinge shaft, and connects the coupling groove of the upper part of the back plate and the coupling protrusion of the second rear bracket. The assembly is completed when the movement control unit is connected between the lower back plate and the first rear bracket, and finally, the present invention enables easy assembly even for beginners.

1 is a view showing a chair equipped with a back plate having a forward function according to the present invention
2 is a view showing a side cross-section of a chair equipped with a backboard having a forward function according to the present invention.
3 is an exploded view showing the back side of the chair provided with the back board having a forward function according to the present invention.
4 and 5 are views showing the disassembled movement control unit in a chair equipped with a back plate having a forward function according to the present invention.
6 is a view showing a side cross-section of a movement control unit in a chair equipped with a back plate having a forward function according to the present invention.
7 to 12 are views showing the operating state of a chair equipped with a back plate having a forward function according to the present invention.

Hereinafter, a preferred embodiment of a chair provided with a backboard having a forward function according to the present invention will be described in more detail based on the accompanying drawings.

Here, components having the same function in all the drawings below are omitted by using the same reference numerals, and repetitive descriptions are omitted. In addition, the terms to be described below are defined in consideration of the functions in the present invention, which are unique and commonly used. to be interpreted in a meaningful way.

1 to 3, the chair 1 provided with a back plate having a forward function in the present invention includes a back plate 10, a seat plate 20, a headrest 30, and a first rear bracket 100 ), and a second rear bracket 200 , a hinge shaft 300 , a rotation control unit 400 , and a movement control unit 500 .

First, the back plate 10 on which the mesh (M) is covered on the front is formed.

The back plate 10 is formed in a rectangular shape forming a frame of a certain thickness by connecting the upper part, the lower part, and the middle part to each other, and forming a space on both sides of the back plate 10 around the middle part of the back plate 10 and concave. A plurality of recessed portions 11 for increasing the bending are formed on the upper and lower portions of the back plate moving in the front and rear direction of the dug chair.

The lower end of the back plate 10 is fixed to the seat plate 20 , and a first rear bracket 100 having a first hinge piece 110 at the upper end is formed.

An upper end is connected to the upper portion of the back plate 10 , a headrest 30 is fixed to the upper front portion, and a second hinge piece 210 connected to the first hinge piece 110 is provided at the lower end to correspond to the first hinge piece 110 . A second rear bracket 200 that rotates in the front-rear direction of the chair is formed on the upper portion of the first rear bracket 110 so that the upper portion of the 10 moves in the front-rear direction of the chair 1 .

The middle portion of the back plate 10 has an inner side connected to pass through the first hinge piece 110 , and both ends are inserted and fixed inside the second hinge piece 210 , and the second rear bracket 200 and A hinge shaft 300 that rotates together is formed.

It is preferable that the periphery of the hinge shaft 300 is formed in a hexagonal shape, and a hole is also formed in the inner side of the second hinge piece 210 in a hexagonal shape.

The reason is to fix the hinge shaft 300 inserted inside the second hinge piece 210 so that it does not idle inside the second hinge piece 210 .

In addition, both sides of the first hinge piece 110 are accommodated so that the ends of the hinge shaft 300 are inserted therein, so that the second rear bracket 200 rotates step by step in the front direction of the chair and rotates in the rear direction of the chair The rotation control unit 400 is formed to return to the

In addition, the lower part of the back plate 10 and the front surface of the first rear bracket 100 are connected so as to be stretched in length so that the lower part of the back plate 10 moves forward stepwise in the front direction of the chair and moves backward in the rear direction of the chair. A movement control unit 500 for returning is formed.

As shown in FIGS. 4 and 5 , the movement control unit 500 is connected to a cylinder member 510 connected and fixed to the front surface of the first rear bracket 100 , and is connected to the lower portion of the back plate 10 to rotate in the vertical direction. A rod member 520 that moves in the front and rear direction together with the lower part of the back plate 10 and lengthens and contracts as it exits or enters the cylinder member 510, and the front is fixed to the rod member 520 and the rod member ( 520) together with the locking member 530 moving in the forward and backward direction of the chair, and guide the rear of the locking member 530 so that the back plate 10 moves forward step by step in the front direction of the chair, and then moves backward in the rear direction of the chair It is roughly divided into a first guide member 540 for returning the chair, and a second guide member 550 for supporting and guiding the rod member 520 to move in the front and rear directions of the chair.

First, in the lower part of the back plate 10 to connect the rod member 520 to rotate in the vertical direction, the hinge bracket 14 protrudes rearwardly from the lower part of the back plate 10 and into which the hinge pin P is inserted. The cylinder member 510 corresponding to the hinge bracket 14 is formed on the front surface of the first rear bracket 100 in order to fixedly connect the cylinder member 510 to the front surface of the first rear bracket 100 . ) A receiving groove 120 into which the rear is inserted and fixed is formed.

The cylinder member 510 is formed to protrude so that a rear thereof is inserted into the receiving groove 120 , and flange portions 511 fixed to both sides of the receiving groove 120 with fastening screws N are formed around the rear circumference. Also, the inner side is opened at the front so that the first guide member 540 is inserted at the upper side, and the space portion 512 for inserting the second guide member 550 is formed at the lower side, and also on the upper surface in the vertical direction. A hook engaging groove 513 for being penetrated and fixed to the first guide member 540 is formed.

The rod member 520 is connected to the hinge bracket 14 of the back plate 10 to rotate in the vertical direction, and a connecting piece 521 fixed by a hinge pin P is formed in the front, and the cylinder member 510 is formed in the rear. A slide 522 slidingly moving from the lower side of the space part 512 is formed, and the first protrusion 531 of the locking member 530 is inserted and fixed in the rear surface of the connection piece 521 by digging downward in the downward direction. A fixing groove 523 is formed, and the first protrusion 531 of the locking member 530 protruded upwardly and inserted into the fixing groove 523 on both sides of the fixing groove 523 toward the side of the chair. An anti-rotation tool 524 for supporting it so as not to rotate is formed.

The locking member 530 is formed in a rod shape having elasticity, and a first protrusion 531 inserted and fixed into the fixing groove 523 of the rod member 520 at the front is bent downward, and the rear In the cylinder member 510, a second protrusion 532 slidingly moving from the upper side of the space 512 is formed to be bent upward.

The first guide member 540 has a second protrusion 532 of the locking member 530 on its inner surface so that the back plate 10 moves forward step by step in the front direction of the chair and moves backward in the rear direction of the chair to return. A plurality of guiding grooves are formed, and an elastic hook 541 into which the hook engaging groove 513 of the cylinder member 510 is inserted and fixed to be fixed to the upper side of the space 512 of the cylinder member 510 on the upper surface. ) is formed, and concave-convex portions 542 for fixing to the second guide member 550 are formed at both ends of the lower side.

The grooves for guiding the second protrusion 532 on the inner surface of the first guide member 540 are as follows.,

First, a first guide for guiding the second protrusion of the locking member 530 so that the back plate 10 begins to move forward in the front direction of the chair by slantingly dug in the rear of the inner surface of the first guide member 540 in the direction of the chair. A groove H1 is formed.

And one side of the inner surface of the first guide member 540 is connected to the first guide groove H1 and dug in the front and rear directions of the chair so that the back plate 10 moves forward only in the front direction of the chair. A second guide groove (H2) for guiding the second protrusion (532) is formed, and one side of the second guide groove (H2) is sequentially dug to be inclined in the side direction of the chair to increase the forward movement distance of the back plate (10) step by step In order to adjust to the locking member 530, a first step groove (C1), a second step groove (C2), and a third step groove (C3) into which the second protrusion 532 of the locking member 530 are respectively inserted and detached are formed, respectively.

In addition, the second protrusion of the locking member 530 is connected to the second guide groove H2 in the front of the inner surface of the first guide member 540 and is dug obliquely so that the back plate 10 is switched from forward movement to backward movement. A third guide groove (H3) for guiding the 532 is formed.

Finally, the other side of the inner surface of the first guide member 540 is connected to the third guide groove H3 and the first guide groove H1 and is dug in the front and rear direction of the chair so that the back plate 10 moves backward in the rear direction of the chair. A fourth guide groove (H4) for guiding the second protrusion (532) of the locking member (530) is formed so as to return to the first guide groove (H1) again.

On the other hand, in the connection section between the second guide groove (H2) and the third guide groove (H3), the second protrusion 532 of the locking member 530 protrudes in a hemispherical shape in the second guide groove (H2). An elastic stopper 543 for intermittent entry into the third guide groove H3 is formed.

In addition, the second guide member 550 is formed to guide the slide 522 of the rod member 520 moving in the front and rear direction of the chair by inserting it inside, and the first guide member 550 has a first guide at both upper ends of the second guide member 550 . The concave-convex portion 551 engaged with and fixed to the concave-convex portion 542 of the member 540 is formed so that the second guide member 550 is fixed to the lower side of the space portion 512 of the cylinder member 510 , and the second guide A plurality of through-holes 552 penetrating in the vertical direction are formed on the inner surface of the member 550 , and the inner side of the through-hole 552 is a stone w to support the slide 522 of the rod member 520 . A support 553 is formed.

On the other hand, as shown in FIGS. 2 and 3 , a coupling groove 12 concave inwardly is formed on the upper portion of the back plate 10 , and the coupling groove 12 is formed on the upper end of the second rear bracket 200 . A coupling protrusion 220 is formed to be inserted into the back plate 10, and the upper end of the back plate 10 and the upper end of the second rear bracket 200 are fixed and connected.

And a hook 13 protruding so that the upper part is opened is formed in the middle part of the back plate 10 , so that the middle part of the back plate 10 and the first rear bracket and the second rear bracket are connected.

In addition, a lumbar support 40 for supporting the lumbar vertebrae of the seated person is inserted and fixed to the front surface of the middle portion of the back plate 10 .

The operation of another embodiment of the present invention configured in this way will be described as follows.

7 is a view showing an operating state of the second protrusion 532 of the locking member 530 before the first guide groove H1 is located and the back plate 10 moves forward in the forward direction of the chair.

As shown in the figure, the rod member 520 is in a fully inserted state of the cylinder member 510, and the second protrusion 532 of the locking member 530 does not move in the first guide groove H1, The back plate 10 is in an initial state before the forward movement.

8 is an operation state diagram illustrating a step in which the second protrusion 532 of the locking member 530 moves to the first step groove C1 and the back plate 10 moves forward in the forward direction of the chair.

As shown in the figure, when the user pulls the lower part of the back plate 10 in the front direction of the chair, the rod member 520 and the locking member 530 connected to the lower part of the back plate 10 fall out of the cylinder member 510 while Together with the back plate 10, the chair moves forward in the forward direction.

At this time, as the first guide groove (H1) is inclined toward the side of the chair, the second protrusion 532 of the locking member 530 is bent toward the first guide groove (H1) by elasticity, and the first guide groove ( The second protrusion 532 of the locking member 530, which enters the second guide groove H2 by riding on the slope of H1), and then moves forward in the second guide groove H2, is formed in the first step groove C1. When the opened entrance is reached, the second protrusion 532 of the locking member 530 is inserted into the adjacent first step groove C1 while the curved locking member 530 is unfolded again by elasticity and restored.

Therefore, if the user no longer pulls the lower part of the back plate 10 in the front direction of the chair, the second protrusion 532 of the locking member 530 is removed from the first step groove C1 and fixed, so the back plate 10 is The second protrusion 532 of the locking member 530 moves forward by the moved distance and stops.

9 is an operation state diagram illustrating a step in which the second protrusion 532 of the locking member 530 moves to the second step groove C2 and the back plate 10 moves forward in the forward direction of the chair.

As shown in the figure, when the user further pulls the lower part of the back plate 10 in the forward direction of the chair while the second protrusion 532 of the locking member 530 is inserted into the first step groove C1, the back plate The rod member 520 and the locking member 530 connected to the lower part of 10 are further pulled out in the cylinder member 510, and the back plate 10 also moves further forward in the front direction of the chair.

That is, the second protrusion 532 of the locking member 530 is bent toward the second guide groove H2 by elasticity, rides the slope of the first step groove C1, and enters the second guide groove H2 again. , then, when the second protrusion 532 of the locking member 530 moving forward in the second guide groove H2 reaches the open entrance of the second step groove C2, the bent locking member 530 is elastic. The second protrusion 532 of the locking member 530 is inserted into the adjacent second step groove C2 as it is unfolded and restored by the

Therefore, if the user no longer pulls the lower part of the back plate 10 in the forward direction of the chair, the second protrusion 532 of the locking member 530 is fixed without being removed from the second step groove C2, the back plate 10 The second protrusion 532 of the locking member 530 moves further forward by the distance moved to the second step groove C2 and stops.

10 is an operation state diagram illustrating a step in which the second protrusion 532 of the locking member 530 moves to the third step groove C3 and the back plate 10 moves forward in the forward direction of the chair.

As shown in the figure, when the user further pulls the lower part of the back plate 10 in the forward direction of the chair while the second protrusion 532 of the locking member 530 is inserted into the second step groove C2, the back plate The rod member 520 and the locking member 530 connected to the lower part of 10 are further pulled out in the cylinder member 510, and the back plate 10 also moves further forward in the front direction of the chair.

That is, the second protrusion 532 of the locking member 530 is bent toward the second guide groove H2 by elasticity and rides the inclined surface of the second system groove C2 and enters the second guide groove H2 again, Afterwards, when the second protrusion 532 of the locking member 530 moving forward in the second guide groove H2 reaches the open entrance of the third step groove C3, the bent locking member 530 is elastically The second protrusion 532 of the locking member 530 is inserted into the adjacent third step groove C2 as it is unfolded again and restored.

Therefore, if the user no longer pulls the lower part of the back plate 10 in the forward direction of the chair, the second protrusion 532 of the locking member 530 is fixed without being removed from the third step groove C2, the back plate 10 The second protrusion 532 of the locking member 530 moves further forward by the distance moved to the third step groove C2 and stops.

11 is an operation state diagram illustrating a step in which the second protrusion 532 of the locking member 530 moves in the third guide groove and the back plate 10 is converted from forward movement of the chair forward to backward movement of the chair. to be.

As shown in the figure, when the user pulls the lower part of the back plate 10 in the forward direction of the chair in a state in which the second protrusion 532 of the locking member 530 is inserted into the third step groove C3, the locking member ( The second protrusion 532 of 530 is bent toward the second guide groove H2 by elasticity, rides the slope of the third step groove C3, enters the second guide groove H2, and thereafter, the second guide groove When the second protrusion 532 of the locking member 530 moving forward in (H2) reaches the third guide groove H3, the bent locking member 530 is restored by being expanded again by elasticity.

On the other hand, since the stopper 543 formed in the connection section between the second guide groove H2 and the third guide groove H3 has elasticity in a hemispherical shape, when the user pulls the back plate 10 with a large force, the pulling force By by, the second protrusion 532 of the locking member 530 can climb over the elastic stopper 543 and enter from the second guide groove H2 to the third guide groove H3, but on the contrary, the locking member ( Before the second protrusion 532 of 530 enters the third guide groove H3, when the force pulling the back plate 10 disappears, the second protrusion 532 of the locking member 530 is a stopper 543. is blocked in the third guide groove (H3) cannot enter and is again inserted into the third step groove (C3).

12 is a step in which the second protrusion 532 of the locking member 530 moves to the fourth guide groove H4, the back plate 10 moves backward in the rear direction of the chair, and returns to the first guide groove H1 again. is a diagram showing the operating state.

When the back plate 10 is pulled and the second protrusion 532 of the locking member 530 rides over the elastic stopper 543 and enters the third guide groove H3, the back plate 10 no longer moves in the forward direction of the chair. Since the forward movement is prevented, when the user pushes the back plate 10 in the rear direction of the chair again, the second protrusion 532 of the locking member 530 moves along the slope of the third guide groove H3 and then the fourth guide groove (H4) is entered.

Therefore, if the user continues to push the back plate 10 in the rear direction of the chair while the second protrusion 532 of the locking member 530 enters the fourth guide groove H, the second protrusion of the locking member 530 is When the 532 is bent toward the fourth guide groove H4 and moves backward, and the second protrusion 532 of the locking member 530 reaches the first guide groove H1, the locking member 530 is elastic. Since it is unfolded again and restored to its original state, the rod member 520 is in a completely inserted state of the cylinder member 510, the back plate 10 is in its initial state before moving forward again.

On the other hand, the anti-rotation member 524 is the second protrusion 532 of the locking member 530 is moved along the grooves on the inner surface of the first guide member 540 while bending in the chair side direction, the rotation preventing member (524) As the first protrusion 531 of the locking member 530 inserted into the fixing groove 523 of the rod member 520 is firmly held so as not to rotate in the chair lateral direction from both sides, the rod member 520 is fixed The fixing force of the first protrusion 531 of the locking part 530 inserted into the groove 523 is further increased.

In addition, the plurality of recessed portions 11 formed on both sides of the backboard 10 makes the recessed portion 11 more flexible than other portions of the backboard 10, so that the lower portion of the backboard 10 has a plurality of recessed portions 11 ), the bending is increased, and the chair can be moved in the forward and backward directions easily.

In addition, in the assembly process of the present invention, the first rear bracket 100, the second rear bracket 200, and the rotation control unit 400 are connected by a hinge shaft 300, and the hook hook of the middle part of the back plate is attached to the hinge shaft 300 ( 13), connect the coupling groove 12 of the upper part of the back plate 10 and the coupling protrusion 220 of the second rear bracket 200, and finally connect the lower part of the back plate 10 and the first rear bracket ( 100) by connecting the movement control unit 500 between the assembly is completed, the present invention can be easily assembled even for beginners.

1: Chair 10: Back
11: groove 12: coupling groove
13: hook 20: seat plate
30: headrest 40: lumbar support
100: first rear bracket 110: first hinge piece
120: receiving groove 200: second rear bracket
210: second hinge piece 220: coupling projection
300: hinge shaft 400: rotation control unit
500: movement control unit 510: cylinder member
511: flange portion 512: space portion
513: hook engaging groove 520: rod member
521: Connection 522: Slide
523: fixing groove 524: rotation prevention device
530: locking member 531: first projection
532: second protrusion 540: first guide member
541: hook 542: uneven portion
550: second guide member 551: uneven portion
552: through hole 553: elastic support part
C1: Home of the first level C2: Home of the second level
C3: 3rd stage home H1: 1st information home
H2: Second Information Home H3: Third Information Home
H4: 4th guide groove N: Fastening screw
P: hinge pin M: mesh

Claims (13)

climbing and
a first rear bracket having a lower end fixed to a seat plate positioned under the back plate and forming a first hinge piece at the upper end;
The upper end is connected to the upper part of the back plate, and a second hinge piece connected to the first hinge piece is formed at the lower end to move the upper part of the back plate in the front and rear direction of the chair from the upper part of the first rear bracket to the front and rear direction of the chair. a second rear bracket that rotates;
a hinge shaft having an inner side connected to the middle part of the back plate and penetrating the first hinge piece so that both ends are inserted and fixed to the second hinge piece;
Both sides of the first hinge piece are accommodated so that the end of the hinge shaft is inserted therein, so that the second rear bracket rotates in the front direction of the chair and rotates in the rear direction of the chair to return to the chair.
A movement control unit is included between the lower part of the back plate and the front surface of the first rear bracket so as to be extended and contracted in length so that the lower part of the back plate moves forward stepwise in the front direction of the chair and moves backward in the rear direction of the chair to return,
The movement control unit,
a cylinder member having a rear fixed to the front of the first rear bracket and forming a space in which the inner side is opened at the front;
A connecting piece connected to rotate in the vertical direction is formed at the front of the lower part of the back plate, and a slide that slides from the lower side of the space is formed at the rear, and a concave fixing groove is formed on the rear side of the connecting piece to form a chair with the lower part of the back plate. a rod member moving in the front-rear direction;
An elastic locking member that forms a first protrusion inserted and fixed in the fixing groove at the front and a second protrusion that slides from the upper side of the space at the rear to move in the front-rear direction of the chair together with the rod member;
a first guide member fixed to the upper side of the space and guiding the second protrusion so that the locking member moves forward stepwise in the front direction of the chair and moves backward in the rear direction of the chair;
and a second guide member fixed to the lower side of the space and guiding the slide so that the rod member moves in the front-rear direction of the chair.
delete The method according to claim 1,
A chair provided with a backboard having a forward function, characterized in that the lower portion of the backplate is further formed with a hinge bracket that protrudes in the rear direction and is connected to a hinge pin inserted into the connecting piece.
The method according to claim 1,
A receiving groove into which the rear of the cylinder member is inserted is further formed on the front surface of the first rear bracket, and a flange portion fixed to the periphery of the receiving groove with a fastening screw is further formed around the rear periphery of the cylinder member, so that the rear of the cylinder member is further formed. A chair provided with a back plate having a forward function, characterized in that it is fixed to the front surface of the first rear bracket.
The method according to claim 1,
A hook protruding upward is further formed on the upper surface of the first guide member, and a hook engaging groove is further formed through the upper surface of the cylinder member in the vertical direction so that the hook is inserted and fixed into the hook engaging groove. One guide member is fixed to the upper side of the space,
Concave-convex portions are further formed at both ends of the first guide member and the second guide member, respectively, so that the concave-convex portions of the second guide member are engaged with and fixed to the concave-convex portion of the first guide member, so that the second guide member is the cylinder member. A chair with a backboard having a forward function, characterized in that it is fixed to the lower side of the space.
The method according to claim 1,
The first guide member,
A first guide groove for guiding the second protrusion of the locking member is formed on the inner surface of the rear surface of the locking member to be inclined in the lateral direction of the chair to start the forward movement of the back plate in the front direction of the chair,
A second guide groove connected to the first guide groove is formed on one side of the inner surface and is dug in the front and rear direction of the chair to guide the second protrusion of the locking member so that the back plate moves forward only in the front direction of the chair, the second guide On one side of the groove, a first step groove, a second step groove, and a third step groove are formed in which the second protrusion of the locking member is inserted and detached in stages so that the forward movement distance of the back plate is adjusted by sequentially digging inclined in the chair side direction, respectively. Each is further formed,
A third guide groove is further formed in front of the inner surface to guide the second protrusion of the locking member so that it is connected to the second guide groove and dug obliquely so that the back plate is switched from forward movement to backward movement,
It is connected to the third guide groove and the first guide groove on the other side of the inner surface and is dug in the front and rear direction of the chair to guide the second protrusion of the locking member so that the back plate moves backward in the rear direction of the chair and returns to the first guide groove A chair provided with a back plate having a forward function, characterized in that a fourth guide groove is further formed.
7. The method of claim 6,
An elastic stopper is further formed in the second guide groove and the third guide groove connecting section to protrude in a hemispherical shape to control the second protrusion of the locking member from entering the third guide groove from the second guide groove. A chair equipped with a backboard having a forward function, characterized in that it becomes.
The method according to claim 1,
Forward function, characterized in that on both sides of the fixing groove of the rod member, a rotation preventing mechanism for supporting the first protrusion of the rod member that protrudes in the upward direction and is inserted into the fixing groove from rotating in the lateral direction of the chair is further formed. A chair equipped with a backrest with
The method according to claim 1,
A plurality of through-holes penetrating in the vertical direction are further formed on the inner surface of the second guide member, and an elastic support part extending to support the slide is further formed on one side of the inside of the through-hole. old chair.
The method according to claim 1,
A chair provided with a backboard having a forward function, characterized in that a plurality of recesses for increasing bending are further formed in the lower part of the backboard, which is recessed at intervals and moves in the front-rear direction of the backboard on both sides of the backboard.
The method according to claim 1,
The upper connection of the upper part of the back plate and the upper end of the second rear bracket is formed with a coupling groove recessed inside the upper part of the back plate, and a coupling protrusion inserted into the coupling groove is formed at the upper end of the second rear bracket to be connected A chair equipped with a backboard having a forward function, characterized in that.
The method according to claim 1,
A backboard having a forward function, characterized in that the hook protruding rearwardly protruding from the middle part of the backboard is further formed so that the middle part of the backboard is hung inside the hinge shaft so that the middle part of the backboard and the first rear bracket are connected. This chair is equipped with.
The method according to claim 1,
A chair provided with a backboard having a forward function, characterized in that a lumbar support is further formed on the front surface of the middle part of the backboard to be detachably fixed to support the lumbar spine of the seated person.
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