KR102649889B1 - Seat rotation apparatus and chair with the same - Google Patents

Abstract

It relates to a seat rotation device and a chair to which it is applied, comprising an operation lever that moves forward by a user's pulling operation, and a support shaft disposed horizontally on the upper part of the leg part inside, coupled with the operation lever to the seat plate. 1 bracket, a pair of second brackets disposed on both sides of the first bracket and fixed to the lower surface of the seat plate, providing a restoring force to move the operating lever rearward to return the operating lever to its original position By providing a configuration including an elastic member and a pair of support blocks disposed between the seat plate and the support shaft and coupled to a pair of second brackets 50, the seat plate is fixed by moving the operation lever forward. can be released to rotate the seat plate forward around the support shaft, and when the seat plate is rotated backward, the seat plate can be stopped in a horizontal position.

Description

Seat rotation device and chair to which it is applied {SEAT ROTATION APPARATUS AND CHAIR WITH THE SAME}

The present invention relates to a chair, and more specifically, to a seat rotating device that rotates the seat in the front and rear directions and a chair to which the same is applied.

Generally, a chair consists of a seat on which a seater can sit, a backrest that supports the seated person's back, and legs that support the seat.

Recently, various types of chairs have been released, ranging from basic chairs focusing on seating functions to chairs with various functions.

The seat of the chair is bent into an arc shape for the comfort of the seated person, and the seat used in a swivel chair is often manufactured so that it can rotate left and right at the upper part of the leg.

For example, Patent Document 1 and Patent Document 2 below disclose a chair configuration according to the prior art.

However, the chairs according to the prior art had the problem that when moving a large number of chairs, each chair had to be moved one by one, requiring a lot of labor and taking a long time to move.

In other words, when storing a chair, the space occupied by the seat and backrest must be secured, so a large number of chairs cannot be stored in a small space, so there is a problem that a large space to accommodate the chairs is needed.

Accordingly, there is a need for the development of chair technology that allows the seat plate to rotate forward on the chair legs, allowing multiple chair seat plates to overlap, allowing multiple chairs to be moved at the same time, and multiple chairs to be stored in narrow spaces. there is.

Republic of Korea Patent Registration No. 10-1281675 (announced on July 3, 2013) Republic of Korea Patent Publication No. 10-2013-0008184 (published on January 22, 2013)

The purpose of the present invention is to solve the problems described above and to provide a seat rotation device that can easily rotate a chair seat forward by simple operation of a lever, and a chair to which the same is applied.

Another object of the present invention is to provide a seat rotation device that stops the rotation of the chair seat at the exact position where the chair seat becomes horizontal when the chair seat that has been rotated forward is rotated backward, and a chair to which the same is applied.

In addition, another object of the present invention is to provide a seat rotation device that can move and store multiple chairs even in a narrow space by stacking multiple chair seats while the chair seat is rotated forward, and a chair to which the same is applied.

In order to achieve the above-described object, the seat rotation device according to the present invention is operated in a state in which a control lever that moves forward by the user's pulling operation and a support shaft disposed horizontally on the upper part of the leg are combined. A first bracket for coupling the lever to the seat plate, a pair of second brackets disposed on both sides of the first bracket and fixed to the lower surface of the seat plate, and moving the operation lever rearward so as to return the operation lever to its original position. It includes an elastic member that provides a restoring force to move the seat plate and a pair of support blocks disposed between the seat plate and the support shaft and coupled to a pair of second brackets, and the seat plate is fixed by moving the operation lever forward. is released to rotate the seat plate forward around the support shaft, and when the seat plate is rotated backward, the seat plate is stopped in a horizontal position. An operating piece is provided at the front end of the operating lever, and the operating lever At the rear end, a movable block is provided that is coupled between the support plate fixed to the support shaft and the seat plate to prevent rotation of the seat plate, and the movable block moves the control lever so that the seat plate can be rotated forward. It is separated from the space between the support plate and the seat plate by moving forward, and the first bracket is formed in the shape of a hexahedron with an open top and back, and a space inside the first bracket where the moving block moves in the front and rear direction. The elastic member is installed between the front wall of the first bracket and the movable block, and the front wall of the first bracket and the front of the movable block have an insertion protrusion and an insertion groove that support the front and rear ends of the elastic member, respectively. It is characterized by being provided.

In addition, in order to achieve the above-mentioned object, the chair to which the seat rotation device according to the present invention is applied includes a pair of support frames disposed on both sides and a leg portion including a support shaft connecting the pair of support frames, A seat portion connected to the upper side of the leg portion so that the user can sit, a backrest connected to the rear of the seat portion, and a seat plate that rotates the seat portion forward around the support shaft disposed horizontally on the upper portion of the leg portion. It includes a rotation device, wherein the seat plate rotation device releases the fixed state of the seat plate by moving the operation lever forward and rotates the seat plate forward around the support shaft, and horizontally adjusts the seat plate when the seat plate rotates backward. It is characterized by stopping at a position where the condition is reached.

As described above, according to the seat rotating device according to the present invention and the chair to which it is applied, the effect of being able to easily rotate the seat plate forward by manipulating the operation lever provided on the seat rotating device is obtained.

And according to the present invention, when the seat plate that has been rotated forward is rotated backward, the effect is obtained that the rotation can be stopped at the exact position where the seat plate is horizontal.

In addition, according to the present invention, the effect of being able to move and store a plurality of chairs with seat plates rotated forward even in a narrow space by bringing them into close contact with each other so that each seat plate overlaps is obtained.

1 is a perspective view of a chair equipped with a seat rotation device according to a preferred embodiment of the present invention;
Figure 2 is an enlarged perspective view of the seat rotating device shown in Figure 1;
Figure 3 is an exploded perspective view of the seat rotating device shown in Figure 2;
Figure 4 is a cross-sectional view taken along line AA' shown in Figure 2;
Figure 5 is an operating state diagram showing the seat plate being rotated forward;
Figure 6 is an example diagram showing a state in which a plurality of chairs with the seat plate rotated forward are stored.

Hereinafter, a seat rotating device according to a preferred embodiment of the present invention and a chair to which it is applied will be described in detail with reference to the attached drawings.

In this specification, the direction in which the backrest is installed around the seat is referred to as the 'rear of the chair', and the opposite direction is referred to as the 'front of the chair'.

In addition, terms indicating directions such as 'left', 'right', 'upward' and 'downward' are defined as indicating respective directions based on the front and rear above.

Figure 1 is a perspective view of a chair to which a seat rotation device according to a preferred embodiment of the present invention is applied, and Figure 2 is an enlarged perspective view showing the seat rotation device shown in Figure 1 from another angle.

Figure 2 shows a state in which the cover shielding the seat rotating device is separated.

As shown in FIG. 1, the chair 10 to which the seat rotating device 20 according to a preferred embodiment of the present invention is applied includes a leg portion 11 including a plurality of legs and connected to the upper side of the leg portion 11. It may include a seat 12 on which the user can sit, and a backrest 13 connected to the rear of the seat 12 to support the user's back.

The leg portion 11 includes a pair of support frames 14 having a cross-section of approximately 'λ' shape when viewed from the side, and a support shaft 15 connecting the upper portions of the pair of support frames 14, Wheels 16 may be installed at the bottom of each support frame 14.

That is, the support shaft 15 rotatably supports the lower part of the seat portion 12 in the front and rear directions, and a pair of support frames 14 may be connected to both ends of the support shaft 15, respectively.

An armrest 17 may be provided at the top of each of the pair of support frames 14 provided on the leg portion 11 to support the user's arms.

For example, the armrest 17 may extend horizontally toward the rear from the top of each support frame 14 of the leg portion 11 and function to stably support the user's arm.

A headrest may be installed on the top of the backrest 13.

The backrest 13 may include a backrest frame formed in a substantially square shape and a backrest sheet installed in the front or inner space of the backrest frame to support the user's waist and back. The backrest frame may be formed in a curved shape with central portions of both ends protruding forward to correspond to the user's back and waist region. And the backrest seat may be made of cloth or leather, or may be made in a mesh shape.

This backrest 13 can be coupled to both ends of the seat portion 12 to enable rotation, that is, tilting, in the forward and backward directions.

As shown in FIG. 2, the seat portion 12 is a portion where the user sits, and may be formed in a substantially square shape.

The upper part of the seat unit 12 may include a seat plate formed in a substantially square plate shape, and a cushion installed on the upper part of the seat plate. Of course, the present invention is not necessarily limited to this, and may be modified to install a mesh instead of a seat board.

In this embodiment, the cushion material, seat plate, and mesh are collectively referred to as the seat plate 21.

Meanwhile, as shown in FIG. 2, it is coupled to the lower part of the seat plate 21 mounted on the upper part of the support shaft 15 to support the seat plate, and when the user pulls the operation lever 30 forward, the seat plate ( A seat rotation device 20 may be provided to rotate 21) in the front-back direction.

In addition, a cover 22 that shields the outer surface of the seat rotating device 20 may be coupled to the lower part of the seat rotating device 20.

The cover 22 is formed in a substantially cylindrical shape with an open upper surface, and a plurality of mounting protrusions that are mounted on a plurality of mounting holes formed on the lower surface of the seat plate 21 may be formed at the front and rear ends of the cover 22, respectively. there is.

Next, the configuration of the seat rotating device according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 2 to 4.

Figure 3 is an exploded perspective view of the seat rotating device shown in Figure 2, and Figure 4 is a cross-sectional view taken along line A-A' shown in Figure 2.

The seat rotation device 20 according to a preferred embodiment of the present invention includes an operation lever 30 that moves forward by the user's pulling operation, and a support shaft 15 inside, which connects the operation lever 30 to the seat plate. It may include a first bracket 40 coupled to (21) and a pair of second brackets 50 disposed on both sides of the first bracket 40 and fixed to the lower surface of the seat plate 21.

And the seat rotating device 20 includes an elastic member 60 and a seat plate that provide a restoring force to move the operating lever 30 backward so that the operating lever 30 returns to its original position when the user's pulling operation is released. It may further include a pair of support blocks 70 disposed between (21) and the support shaft 15 and coupled to a pair of second brackets 50.

The control lever 30 is formed to extend in the shape of a roughly rectangular plate with a length in the front-back direction longer than the width in the left-right direction and the height in the up-down direction, and the front end of the control lever 30 is provided so that the user can easily hold it with his or her fingers. The piece 31 may be bent downward.

And a moving block 32 may be provided at the rear end of the operating lever 30.

The moving block 32 is formed in a substantially hexahedral shape and can be coupled between the support plate 18 installed in the center of the support shaft 15 and the lower surface of the seat plate 21.

The support plate 18 is formed in the shape of an approximately rectangular plate whose width in the left and right directions extends longer than the length in the front and rear directions, and is connected to the support shaft 15 by a pair of connecting pieces 19 provided at both ends of the support plate 18. It is fixed to the central lower part of and can support the moving block 32 coupled to the upper part.

Here, the pair of connecting pieces 19 are each formed in a substantially triangular plate shape and may be bent upward at both ends of the support plate 18.

The pair of connecting pieces 19 and the support plate 18, together with the support frame 15 and the support shaft 15, are made of durable metal material and are firmly fixed to the support shaft 15 by welding or the like. It can be.

And the pair of connection pieces 19 are respectively coupled to a pair of support grooves 23 formed on the lower surface of the seat plate 21 during the forward rotation operation of the seat plate 21, so that the seat plate 21 together with the support plate 18 It can function as a stopper to limit the maximum rotation angle.

One or more guide protrusions may be provided on the upper surface of the support plate 18 and the lower surface of the moving block 32 along the front-back direction in corresponding shapes.

The guide protrusion guides the moving block 32 to move in the correct position when the moving block 32 moves forward and backward, and when the moving block 32 is coupled between the support plate 18 and the seat plate 21, the guide protrusion guides the moving block 32 to move in the correct position. It is possible to prevent the moving block 32 and the operating lever 30 from moving due to force or impact applied from the outside in the left and right directions.

In this way, as the moving block 32 is coupled between the support plate 18 and the seat plate 21, the seat plate 21 can be non-rotatably fixed to the upper end of the support shaft 15.

Meanwhile, the moving block 32 moves forward together with the forward movement of the operating lever 30 and is separated from the space formed between the support plate 18 and the seat plate 21.

In this way, when the moving block 32 is separated from the space between the support plate 18 and the seat plate 21, the seat plate 21 becomes rotatable in the forward and backward directions at the top of the support shaft 15.

Here, the support shaft 15 may be disposed rearward compared to the center of the seat plate 21 in the front-back direction when viewed from the side. Accordingly, the seat plate 21 can rotate forward around the support shaft 15 so that the front end faces downward due to its own weight.

Additionally, a fastening hole 33 through which a fastening bolt is fastened to the first bracket 40 may be formed in the rear portion of the operating lever 30 through the operating lever 30 in the vertical direction. The fastening hole 33 may be formed in the shape of a long hole extending long in the front-back direction.

Therefore, the forward and backward movement distance of the control lever 30 may be limited by the length of the fastening hole 33 formed in a long hole shape.

The first bracket 40 functions to shield the outer surface of the moving block 32 of the support plate 18 and the operating lever 30 and couples the operating lever 30 to the seat plate 21.

For this purpose, the first bracket 40 is formed in an approximately hexahedral shape with the top and rear sides open, and the moving block 32 of the operating lever 30 is inside the first bracket 40 and can move in the forward and backward directions. Space can be formed.

An elastic member 70 is installed between the front wall of the first bracket 40 and the front of the movable block 32 to provide restoring force to the movable block 32 and the operating lever 30.

For example, the elastic member 60 may be provided as a coil spring.

Here, on the rear side of the front wall of the first bracket 40, an insertion protrusion 41 may be formed to protrude toward the rear so as to be inserted into the front end of the elastic member 60 provided as the coil spring. In addition, an insertion groove 34 into which the rear end of the elastic member 60 provided by the coil spring is inserted may be formed on the front side of the moving block 32 facing the insertion protrusion 41.

Therefore, as the front and rear ends of the elastic member 60 are fixed by the insertion protrusion 41 and the insertion groove 42, respectively, the elastic member 60 deviates from the process of being elastically deformed to reduce its length by the forward movement of the operation lever 30. You can maintain a certain position without doing so.

In addition, the front wall of the first bracket 40 has a fastening hole 42 through which the fastening bolt is fastened through the fastening hole 33 of the operating lever 30, and a fastening hole 42 that allows the forward and backward movement of the operating lever 30. The guiding movement guide 43 may extend forward from the front end of the fastening hole.

In addition, a pair of flanges 44 are provided at the top of both walls of the first bracket 40, and each flange 44 has a coupling protrusion 45 that is coupled to a coupling hole formed on the lower surface of the seat plate 21. can be formed.

This flange 44 can be firmly coupled to the lower surface of the seat plate 21 by a through bolt that penetrates the flange 44 and is fastened to an insert nut (not shown) inserted into the lower surface of the seat plate 21. .

The pair of second brackets 50 each function to rotatably couple the seat plate 21 to the support shaft 15.

For this purpose, the second bracket 50 is formed with a coupling space 51 in the center where the support shaft 15 is coupled, and as long as the front and rear ends of the second bracket 50 are coupled to the lower surface of the seat plate 21, respectively. A pair of flange portions 52 may be provided.

Therefore, the second bracket 50 may have a cross-section of approximately an inverse omega (Ω) shape when viewed from the side.

The coupling space 51 is a space where the support shaft 15 is coupled, and may be formed in a shape corresponding to the cross-sectional shape of the support shaft 15. That is, as the support shaft 15 is formed in a pipe shape, the cross section of the coupling space 51 may be formed to have a substantially circular shape.

And at the upper front and rear ends of the coupling space 51, a pair of locking protrusions 53 are provided to prevent the support shaft 15 coupled to the coupling space 51 from being separated by external force or impact. This can be formed.

Here, the locking protrusion 53 may have a polygonal shape such as a triangular cross section or a semicircular shape.

The second bracket 50 can be firmly coupled to the lower part of the seat plate 21 by a through bolt that penetrates the flange portion 52 and is fastened to an insert nut inserted into the lower surface of the seat plate 21.

A support block 70 coupled between the upper surface of the support shaft 15 and the lower surface of the seat plate 21 may be coupled to the upper part of the coupling space 51 of the second bracket 50.

The support block 70 may be formed in an approximately hexahedral shape corresponding to the upper part of the coupling space 51 of the second bracket 50. And the lower surface of the support block 70 may be formed as an upwardly concave curved surface 71 to correspond to the upper surface of the support shaft 15.

In addition, a seating surface 72 in the shape of an inclined or curved surface corresponding to a pair of locking protrusions 53 formed on the front and rear sides of the upper part of the coupling space 51, respectively, will be provided at the lower portions of the front and rear ends of the support block 70. You can.

That is, when the cross-section of the locking protrusion 72 is formed in a polygonal shape such as a triangular shape, the seating surface 72 may be formed as an inclined surface inclined toward the rear downward or front downward to correspond to the cross-sectional shape of the locking protrusion 53. In addition, when the cross-section of the locking protrusion 53 is formed in a curved shape, such as a semicircular shape, the seating surface 72 may be formed in a curved shape, such as a semicircular shape, to correspond to the cross-sectional shape of the locking protrusion 53.

This support block 70 can be firmly fixed to the seat plate 21 by combining one or more mounting protrusions 73 formed on the upper surface with mounting holes formed on the lower surface of the seat plate 21.

Therefore, the support block 70 and the second bracket 50 are coupled to each other with the support shaft 15 coupled to the coupling space 51 of the second bracket 50, and the seat plate 21 is connected to the support block 70. ) and the second bracket 50 may rotate depending on the forward and backward movement positions of the control lever 30 while being coupled to the support shaft 15 or may be fixed so that rotation is not possible.

In this way, the present invention can easily rotate the seat plate forward by manipulating the operation lever provided on the seat rotation device.

Next, with reference to FIGS. 1, 5, and 6, the connection relationship and operating method of the seat rotating device and the chair to which it is applied according to a preferred embodiment of the present invention will be described in detail.

Figure 5 is an operation state diagram showing a state in which the seat plate is rotated forward using a seat plate rotation device, and Figure 6 is an example diagram showing a state in which a plurality of chairs with the seat plate rotated forward are stored.

First, the worker assembles the operation lever 30 and the first bracket 40 of the seat rotation device 20.

A fastening bolt is fastened to the fastening hole 42 formed on the front side of the first bracket 40 through the fastening hole 33 formed in a long hole shape in the operation lever 30. Accordingly, the operating lever 30 and the first bracket 40 are coupled.

At this time, an elastic member 60 is installed between the front wall of the first bracket 40 and the moving block 32 of the operation lever 30.

Next, the operator couples the first bracket 40 on which the operating lever 30 is assembled to the support shaft 15.

Here, the support plate 18 is installed at the center of the support shaft 15 by a pair of connecting pieces 19.

At this time, the moving block 32 at the rear end of the operating lever 30 is seated on the upper surface of the support plate 18 disposed inside the first bracket 40.

Next, the seat plate 21 is placed on the upper part of the support shaft 15, and the seat plate 21 and the seat rotation device 20 are assembled.

At this time, a pair of support blocks 70 are coupled to the lower part of the seat plate 21.

A pair of support blocks 70 are respectively coupled to the upper part of a pair of second brackets 50 provided on the seat rotating device 20. Then, the support shaft 15 is coupled to the coupling space 51 formed in each second bracket 50. At this time, the support shaft 15 is fixed without being separated from the second bracket 50 by being caught by the locking protrusions 53 formed at the front and rear ends of the upper part of the coupling space 15, respectively.

Next, a plurality of through bolts pass through the flanges 44 on both sides of the first bracket 40 and the flange portions 52 on both sides of the second bracket 50 and are fastened to the insert nuts inserted into the lower surface of the seat plate 21, respectively. do.

Through this process, when the assembly of the seat rotating device 20 and the seat plate 21 is completed, a pair of support frames 14 are coupled to both ends of the support shaft 15, and both sides of the seat plate 21 are connected to each other. The leg portion 11, the seat portion 12, and the backrest 13 are assembled by combining both lower ends of the backrest 13.

Therefore, when the assembly of the chair 10 is completed, the seat plate 21 of the seat portion 13 is placed in a substantially horizontal state on the upper part of the support shaft 15, as shown in FIG. 1.

That is, since the moving block 32 of the control lever 30 is coupled between the support plate 18 and the lower surface of the seat 21, the seat 21 cannot rotate, so the user can move the seat part ( Even if you sit on 12) and press the seat plate 21 forward or backward, it continues to remain horizontal.

On the other hand, when the user pulls the operating lever 30 forward in order to rotate the seat plate 21 forward, the moving block 32 provided at the rear end of the operating lever 30 moves to the front wall of the first bracket 40. It moves forward while elastically deforming the elastic member 60 disposed between the and the moving block 32 so that its length decreases.

In this way, as the moving block 32 moves forward and is separated from the space between the support plate 18 and the seat plate 21, the seat plate 21 can rotate toward the front around the support shaft 15. do.

At this time, as shown in FIG. 5, the support shaft 15 of the seat plate 21 is disposed rearward than the front-to-back center of the seat plate 21 when viewed from the side, so that the front end faces downward due to its own weight. rotates to

Here, a pair of connecting pieces 19 connected to both ends of the support plate 18 are coupled to a pair of support grooves 23 formed on the lower surface of the seat plate 21 and limit the maximum rotation angle of the seat plate 21.

In this way, when the seat plate 21 is rotated forward, the user can release the pulling operation of the operation lever 30 and overlap the seat plates 21 of multiple chairs as shown in FIG. 6.

At this time, even if the user's pulling operation is released, the control lever 30 can maintain its forward movement state because the moving block 32 is caught on the front end of the support plate 18 and cannot move backward.

Meanwhile, the support frame 14 of the leg portion 12 is arranged to have a narrower width than the front pair of frames compared to the rear pair of frames, so that the rear pair of chairs 10 located in the front of the chair 10 As the front pair of frames are inserted between the frames, the seat plates 21 of each chair 10 may overlap each other.

Then, the user can move multiple chairs 10 simultaneously by overlapping them in a shopping cart-like manner with the seat plate 21 rotated as described above, and the multiple chairs 10 can be easily moved even in a narrow space. It can be stored.

Meanwhile, when returning the seat plate 21 that has been rotated forward to its original state, that is, the horizontal state, the user rotates the seat plate 21 backward without additional manipulation while the operation lever 30 is pulled forward.

At this time, the moving block 32 of the control lever 30 moves forward and is separated from the space between the support plate 18 and the seat plate 21, so the seat plate 21 can rotate backwards.

Accordingly, when the user rotates the seat plate 21 backward, the control lever 30 moves rearward by the restoring force provided by the elastically deformed elastic member 60 as it extends to its original length. At this time, the moving block 32 is inserted and coupled to the space between the seat plate 21 and the support plate 18.

At this time, as the moving block 32 is coupled to the space between the seat plate 21 and the support plate 18, the seat plate cannot rotate further rearward, and the rotation motion will stop at the exact position where the seat plate 21 is horizontal. You can.

Accordingly, the seat plate 21 is firmly fixed so that rotation of the seat plate 21 is impossible even if a user applies force toward the front or rear while seated on the seat unit 12.

As described above, the present invention can easily rotate the seat plate forward by manipulating the operation lever provided on the seat rotation device.

And in the present invention, when the seat plate rotated forward is rotated backward, the rotation can be stopped at the exact position where the seat plate is horizontal.

In addition, the present invention allows multiple chairs with seat plates rotated forward to be moved and stored even in a narrow space by bringing each seat into close contact with each other so that each seat plate overlaps.

Although the invention made by the present inventor has been described in detail according to the above-mentioned embodiments, the present invention is not limited to the above-described embodiments and, of course, can be changed in various ways without departing from the gist of the invention.

The present invention is applied to a seat rotation device that can easily rotate the seat forward by operating an operating lever and to chair technology to which it is applied.

10: chair 11: leg part
12: seat part 13: backrest
14: support frame 15: support shaft
16: Wheel 17: Armrest
18: support plate 19: connection piece
20: Seat rotation device
21: Seat 22: Cover
23: Support groove
30: operation lever 31: operation section
32: moving block 33: fastening hole
34: Insertion groove
40: first bracket 41: insertion protrusion
42: Fastening study 43: Movement guide
44: flange 45: coupling protrusion
50: second bracket 51: coupling space
52: Flange portion 53: Locking jaw
60: Elastic member
70: support block 71: curved surface
72: Seating surface 73: Mounting protrusion

Claims (5)

An operating lever that moves forward by the user's pulling operation,
A first bracket for coupling the operating lever to the seat plate with a support shaft horizontally disposed on the upper part of the leg part coupled thereto,
A pair of second brackets disposed on both sides of the first bracket and fixed to the lower surface of the seat plate,
An elastic member that provides a restoring force to move the operating lever rearward so as to return the operating lever to its original position,
A pair of support blocks disposed between the seat plate and the support shaft and coupled to the pair of second brackets, and
It includes a cover coupled to the lower part of the seat plate to shield the exterior of the seat rotating device,
By moving the control lever forward, the fixed state of the seat plate is released to rotate the seat plate forward about the support shaft, and when the seat plate is rotated backward, the seat plate is stopped in a horizontal position,
An operating piece is provided at the front end of the operating lever,
At the rear end of the operation lever, a moving block is provided that is coupled between the support plate fixed to the support shaft and the seat plate to prevent rotation of the seat plate,
The moving block is separated from the space between the support plate and the seat plate by forward movement of the operation lever so that the seat plate can be rotated forward,
The first bracket is formed in a hexahedral shape with an open top and rear surface,
A space is formed inside the first bracket in which the moving block moves forward and backward,
The elastic member is installed between the front wall of the first bracket and the moving block,
An insertion protrusion and an insertion groove are provided on the front wall of the first bracket and the front of the moving block, respectively, to support the front and rear ends of the elastic member,
A fastening hole is formed in the operating lever through which a fastening bolt passes through the operating lever and is fastened to the first bracket,
The fastening hole is formed in a long hole shape to limit the forward and backward movement distance of the operation lever,
The second bracket has a coupling space in the center where the support shaft is coupled,
A pair of flange portions coupled to the lower surface of the seat plate are provided at the front and rear ends of the second bracket, respectively,
A pair of locking protrusions are formed at the upper front and rear ends of the coupling space to prevent separation of the support shaft coupled to the coupling space, respectively,
The support block coupled to the lower surface of the seat plate is coupled to the upper part of the coupling space,
The support block is formed in a shape corresponding to the upper part of the coupling space,
The lower surface of the support block is formed as a curved surface corresponding to the outer surface of the support shaft,
Seating surfaces that are seated on the locking protrusions are formed at the front and rear ends of the support block, respectively,
The second bracket and the support block are respectively disposed on the upper and lower sides of the support shaft and coupled to each other with the support shaft coupled to the coupling space of the second bracket,
The seat plate, while coupled to the support shaft by the support block and the second bracket, rotates or is fixed so as not to rotate depending on the forward and backward movement position of the operating lever,
One or more mounting protrusions are formed on the upper surface of the support block to be coupled to mounting holes formed on the lower surface of the seat plate,
At both ends of the support plate, a pair of connection pieces are bent upward to secure the support plate to the support shaft,
The pair of connecting pieces are coupled to a pair of support grooves formed on the lower surface of the seat when the seat is rotated forward, and provide a stopper function to limit the maximum rotation angle of the seat. delete delete delete In the chair to which the seat rotation device described in claim 1 is applied,
A leg portion including a pair of support frames disposed on both sides and a support shaft connecting the pair of support frames,
A seat portion connected to the upper side of the leg portion to allow the user to sit,
A backrest connected to the rear of the seat portion and
It includes a seat rotation device that rotates the seat of the seat unit forward about the support shaft horizontally disposed on the upper part of the leg unit,
The seat plate rotation device releases the fixed state of the seat plate by moving the operation lever forward and rotates the seat plate forward around the support shaft, and stops the seat plate in a horizontal position when the seat plate rotates backward. A chair equipped with a seat rotation device, characterized in that

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