KR20110066652A - Chair - Google Patents

Abstract

PURPOSE: A chair structure is provided to simply move a seat back upward and downward by forming a moving block that is slidably combined with a fixed block. CONSTITUTION: A chair structure comprises a tilting block(30), a supporting frame(40), a fixed block(50), a moving block, and an elastic member. The tilting block is combined with the lower part of a chair seat(10). The supporting frame is elastically transformed. The fixing block is fixed to the supporting frame. The moving block is combined to slide upward and downward against the fixed block. The elastic member elastically presses the moving block against the fixed block.

Description

Chair structure {Chair}

The present invention relates to a chair structure, in particular, when the user presses the back of the chair back, the backrest is rotated to move downwards so that the backrest can always support the user's body at a certain position in the chair structure is improved It is about.

In recent years, as the time for sitting and living in a chair increases, a chair that can reduce the fatigue of the user even when sitting for a long time by providing the user with the best seating comfort and comfort has been continuously developed.

Among them, the most notable part can be said to be the development of a tilting chair in which the back is rotated in response to the user's posture when the user presses the back.

1 and 2 show a schematic operating state of such a conventional tilting chair. Figure 1 shows a state where the user is sitting upright waist, Figure 2 schematically shows the state when the user pushes back the back.

As shown in FIG. 1, the conventional tilting chair includes a seat plate 2, a backrest 3, a tilting block 4 coupled to a lower side of the seat plate, and a support frame 5 connecting the tilting block and the backrest. It is composed of

One end of the support frame 5 is rotatably coupled to the tilting block 4, and the other end of the support frame 5 is coupled to the backrest 3. The support frame 5 is elastically deformable so that it is elastically deformed when the user presses the backrest 3 back, and returns to the original state smoothly when the pressing force for pressing the backrest 3 by the user is removed.

However, the conventional tilting chair structure by such a configuration causes the following problems.

When the user presses the backrest 3 back, the rotational track L1 of which the back of the user rotates and the rotational track L2 of which the backrest 3 rotates are different from each other, and the backrest 3 is rotated. 3) can not support the user's body parts in a certain position.

Specifically, when the user presses the back 3, the back of the user is rotated along the rotational track L1 about the hip portion H1. On the other hand, the backrest 3 is rotated about the rotation center point C. This is because the backrest 3 is connected to the support frame 5 and because the support frame 5 rotates along the rotation center point C, the rotation center point of the backrest 3 becomes C. Thus, as shown in Fig. 2, the user's back and back 3 rotate along different rotation trajectories.

Let the point of the lumbar part of the user supported by the backrest 3 be T1, and the point of the backrest 3 which is in contact with the lumbar part of the user be X1. Then, as shown in Fig. 1, T1 and X1 coincide at first when the backrest 3 does not rotate. However, when the backrest 3 is pushed back and rotated, T1 moves along the rotational track L1 and X1 moves along the rotational track L2.

As a result, when the backrest 3 rotates, the backrest 3 supports a body part different from the body part of the user who was initially supported. Therefore, the backrest 3 does not support a certain part of the user's body, the user feels discomfort as the posture changes, and increases the degree of fatigue when sitting for a long time.

In particular, recent studies have shown that supporting a user's lumbar spine can reduce fatigue to a maximum. In recent years, the chair structure mainly uses an "S" type backrest to support the user's lumbar spine. By the way, when the user pushes back the backrest 3, if the position of the body supported by the backrest 3 is changed due to the difference in the rotation trajectory as described above, the specific part of the backrest 3 designed to support the lumbar spine Since it supports other parts of the body other than the lumbar spine, it causes more inconvenience to the user and results in increased fatigue.

On the other hand, in order to solve such a difference in the rotational trajectory, a chair structure is developed in which the seat plate and the backrest are tilted in response to the user's posture while rotating in association with each other. However, such a chair structure has a problem in that its structure is complicated, which requires a lot of manufacturing time and increases manufacturing cost.

The present invention has been made to solve the problems and various problems as described above, the object of the present invention is to provide a chair structure with improved structure so that the user can always support the lumbar region at a certain position even if the user changes posture during sitting It is done.

Chair structure according to the present invention for achieving the above object, in the tiltable chair structure having a seat plate and a backrest, the tilting block coupled to the lower portion of the seat plate; A support frame having one end rotatably coupled to the tilting block, the other end extending above the seat plate portion, and being elastically deformable; A fixed block fixed to the support frame; A moving block coupled to the backrest and slidably coupled upward and downward with respect to the fixed block; And an elastic member that elastically presses the movable block upwardly with respect to the fixed block. When this is removed, the backrest is moved upward with respect to the fixed block by the elastic member.

The elastic member may include a rolling part coupled to an upper end of the fixed block, and a leaf spring wound around the rolling part and having one end connected to the moving block, wherein the leaf spring connects the moving block to the fixed block. It is preferable to pressurize in an upward direction with respect to.

In addition, it is coupled to the fixed block, and provided with a guide rod extending in the vertical direction of the fixed block to guide the moving block, the moving block is preferably formed with an insertion hole into which the guide rod is inserted.

In addition, the fixed block has a receiving portion for receiving the movable block, the guide rod is inserted into the receiving portion, both ends are respectively coupled to the upper end and the lower end of the fixed block, the movable block is the upper end of the fixed block It is preferable to move between and the lower end.

In addition, the insertion hole is preferably inserted into the bush sliding contact with the outer peripheral surface of the guide rod.

In addition, the guide bar is connected to the upper end and the lower end of the fixed block is provided, the moving block is preferably formed with a guide groove into which the guide bar is inserted.

Chair structure according to the present invention, when the user pushes the back back by pushing, the back block is coupled to move the movement downward with respect to the support frame, thereby providing the effect of supporting the lumbar part of the user at a constant position at all times.

In addition, the backrest is easily moved in the vertical direction by a relatively simple configuration employing a movable block slidably coupled to the fixed block, thereby reducing the manufacturing cost and simplifying the production process.

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

Figure 3 is a side view of the chair structure according to an embodiment of the present invention, Figure 4 is an exploded perspective view of the main portion of Figure 3 extracted. 5 is a perspective view of the combination of Figure 4, Figure 6 is a rear view of FIG. 7 and 8 is an operating state diagram of the chair structure according to the embodiment of the present invention.

first, 3 and 4, the chair structure according to the embodiment of the present invention is a tiltable chair structure having a seat plate portion 10 and a backrest 20, which is coupled to a lower portion of the seat plate portion 10. Tilting block 30, one end is rotatably coupled to the tilting block 30, the other end is extended to the upper side of the seat plate portion 10, the elastically deformable support frame 40 and the support frame A fixed block 50 fixed to the 40, coupled to the backrest 20, the movable block 60 is coupled to the fixed block 50 so as to be slidable in the vertical direction, and the movable block 60 It includes an elastic member 70 for elastically pressing upward with respect to the fixed block (50).

In the present embodiment, the seat plate 10 and the backrest 20 are employed to be used in a general chair structure, in particular the backrest 20 is "S" in order to support the user's lumbar region accurately and stably. The back of the mold is used.

The tilting block 30 is coupled to the lower portion of the seat plate 10 to support the support frame 40. The leg portion of the chair is coupled to the lower side of the tilting block 30, and the height adjusting handle 32 is provided to adjust the height of the seat plate portion 10. In addition, when the backrest 20 is pushed back by the user, the tilting block 30 and the seat plate 10 are connected to each other so that the tail portion of the seat plate 10 is moved downward when the support frame 40 is rotated. The seat plate butting connection member 34 is provided.

One end of the support frame 40 is rotatably coupled around the rotational center point C of the tilting block 30. The support frame 40 is made of "L" type as a whole. That is, it extends in one direction from the one end and is bent upwards toward the backrest 20. The fixing block 50 is coupled to the upper end of the portion extending upward toward the backrest 20. The support frame 40 is elastically deformed while the user presses the backrest 20 back while rotating in a clockwise direction about the center of rotation (C). Since the support frame 40 is made of an elastically deformable material, when the user pushes the backrest 20, the shock caused by the reaction force is alleviated, and the user is cushioned to improve seating comfort.

The fixed block 50, the movable block 60, and the elastic member 70 are the main components of the present invention, and the backrest 20 is tilted backwards, or when the backrest is returned to its original position. 20) is the main component for moving the up and down direction.

4 to 6, the fixed block 50 is coupled to the support frame 40, and the movable block 60 is coupled thereto. The fixed block 50 has a receiving portion 52 in which the movable block 60 is accommodated, and is made of a hollow rectangular parallelepiped as a whole. The accommodating part 52 has a hollow part formed to penetrate the fixing block 50 to serve as the accommodating part 52. The upper end and the lower end of the fixed block 50 are connected by the guide bar 54. The edge of the fixed block 50 is fastened to the support frame 40 by a bolt. In addition, the guide rod 80 is coupled to the fixed block 50. The guide rod 80 extends in the vertical direction in the longitudinal direction based on the state in which the fixing block 50 is coupled to the support frame 40. Both ends of the guide rod 80 are coupled to the upper end and the lower end of the fixed block 50, respectively, and inserted into the receiving portion 52 of the fixed block 50. In the present embodiment, two guide rods 80 are provided and inserted into the receiving portion 52 in parallel with each other.

The movable block 60, one side is coupled to the backrest 20, is coupled to the fixed block 50 so as to be slidable in the vertical direction. The movable block 60 and the backrest 20 are fastened by bolts. The movable block 60 is accommodated in the receiving portion 52, the insertion hole 62 is formed is inserted into the guide rod 80. The moving block 60 is moved along the guide rod 80 between the upper end and the lower end of the fixed block 50. In addition, the movable block 60 is formed with a guide groove 64 into which the guide bar 54 is inserted, and the insertion hole 62 has a bush 90 in sliding contact with the outer circumferential surface of the guide rod 80. Is inserted.

The elastic member 70 is provided to return the backrest 20 to its original position when the back pressure 20 is pushed back by the user while the backrest 20 is pushed back.

The elastic member 70 is elastically pressing the moving block 60 upward with respect to the fixed block 50, in this embodiment, is composed of a rolling portion 72 and the leaf spring (76).

The rolling unit 72 is coupled to the upper end of the fixed block 50, it is rotatably coupled to the fixed block 50. The rolling part 72 is formed in a cylindrical shape as a whole, and the rotating shaft 74 protruding from both ends is coupled to the upper end of the fixed block 50 and rotated.

The leaf spring 76 is wound in one direction on the rolling portion 72 and has a width somewhat smaller than the width of the side portion of the rolling portion 72. One end of the leaf spring 76 is coupled to the movable block 60. A coupling hole 76a is formed at one end of the leaf spring 76, and a fastening hole is formed in the movable block 60. The leaf spring 76 is fastened by inserting a coupling pin 78 into the coupling hole and the coupling hole. The leaf spring 76 maintains a state in which the movable block 60 is elastically pressed upward.

Hereinafter, the operation and effects of the chair structure according to the present invention having the above configuration will be described in detail with reference to FIGS. 7 and 8.

For convenience of explanation, the point of contact of the lumbar backrest 20 of the user from the viewpoint of the user is referred to as T1, and the rotational trajectory when the user rotates the back of the user by pressing the backrest 20 is referred to as L1. Further, in view of the backrest 20, the contact point of the backrest 20 in contact with the lumbar spine of the user is referred to as X1, and the backrest 20 when the user presses the backrest 20 back and the backrest 20 is rotated. ) Is called L2.

7 shows a state in which the backrest 20 supports the user's back while the user stands up straight. Since the backrest 20 is not rotated, in particular, the user's lumbar region is accurately supported. As shown in Fig. 7, in the state where the backrest 20 is not rotated, the T1 point and the X1 point coincide with each other.

8 shows a state when the user pushes the backrest 20 back. When the user presses the backrest 20 back, the user's back is rotated along the rotational track L1 with respect to the hip portion H1. Then, the backrest 20 is rotated along the rotational track L2 clockwise about the rotation center point (C). Backrest 20 is connected to the support frame 40, the support frame 40 is rotated about the center of rotation (C), the backrest 20 is also rotated around the center of rotation (C). Thus, the user's back and back 20 are rotated along different rotation trajectories. At this time, the chair structure according to the present invention, the moving block 60 moves downward with respect to the fixed block 50, by moving the point X1 on the rotational trajectory L2 onto the rotational trajectory L1, thereby always matching T1 and X1. To do that.

Hereinafter, a process of moving the moving block 60 downward with respect to the fixed block 50 when the user presses the backrest 20 back will be described in detail.

When the user diagrammatically disassembles the pressing force F1 for pressing the backrest 20 back, it is disassembled into a horizontal force F2 for pushing the backrest 20 horizontally and a vertical force F3 for pushing the backrest 20 vertically downward. can do.

Therefore, the backrest 20 receives a force to move downward by the vertical force F3. At this time, since the backrest 20 is coupled to the movable block 60, the movable block 60 is forced downward with respect to the fixed block 50.

Therefore, the movable block 60 slides downward with respect to the fixed block 50 along the guide rod 80. In addition, since the guide bar 54 coupled to the fixed block 50 is inserted into the guide groove 64 of the movable block 60, the guide bar 54 guides the movable block 60 like the guide rod 80. The guide bar 54 also serves as a frame for guiding the moving block 60 together with the guide rod 80 while maintaining the outer shape of the fixed block 50 when the moving block 60 moves.

On the other hand, when the pressing force for pressing the backrest 20 by the user is removed, the support frame 40 is elastically deformed and returned to its original position. At this time, since the elastic member 70 elastically presses the movable block 60 upward with respect to the fixed block 50, the elastic member 70 moves the movable block 60 upward, and as a result, is coupled to the movable block 60. The backrest 20 is moved upward.

Through the above process, even if the user presses the backrest 20 backward and the backrest 20 rotates backward, the backrest 20 moves downward, so that the lumbar part of the first user contacts the backrest 20 from the point of view of the user. The point T1 and the point X1 in contact with the lumbar spine of the user in terms of the backrest 20 coincide with each other, so that the backrest 20 constantly supports a certain portion of the user.

As described above, the chair structure according to the present invention, when the user presses the back of the chair 20 in the seated state on the chair, the support frame 40 which rotates around the user's rotation trajectory, the tilting block 30 To compensate for the difference in rotational trajectory with When the seated user changes his posture, the chair structure must be tilted in response to a change in the user's body to maintain a comfortable seating state. However, in the conventional chair structure, as described in the background art section, when the user sits on the chair structure and moves, for example, when the backrest 20 is pushed back, the rotational track and the backrest 20 of the user's back are supported by the support frame. Rotation trajectories rotated around the center 40 are different from each other, resulting in supporting portions different from those originally supported by the backrest 20 in a changed posture. The present invention solves the problem of the conventional chair structure, when the user presses the backrest 20, by using the pressing force of the user to move the backrest 20 to the lower direction to rotate the rotational track of the backrest 20 By inducing it to coincide with the rotational trajectory of the user, the backrest 20 always provides the effect of supporting the back at a constant position.

In addition, the chair structure according to the present invention is implemented through a simple structure, compared to the chair structure inducing tilting by the conventional complex structure, there is an advantage that can be reduced in manufacturing cost, and the process can be simplified.

As mentioned above, although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to the above embodiments, and many other various modifications can be provided without departing from the scope of the present invention. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 and 2 schematically show a state when the back of the conventional chair structure is flipped back;

3 is a side view of a chair structure according to an embodiment of the present invention;

Figure 4 is an exploded perspective view of the main portion of Figure 3,

5 is a perspective view of the combination of FIG.

6 is a rear view of FIG. 5;

7 and 8 is an operating state diagram of the chair structure according to the embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10 ... Seat 20 ... Backrest

30 ... tilting block 32 ... height adjustment handle

34 ... connection member 40 ... support frame

50 ... fixed block 52 ... housing

54. Guide bar 60 ... Moving block

62. Insertion hole 64 ... Guide groove

70 ... elastic member 72 ... rolling part

74 ... pivot shaft 76 ... leaf spring

80 ... guide rod 90 ... bush

Claims (6)

A tiltable chair structure having a seat plate portion and a backrest, A tilting block 30 coupled to a lower portion of the seat plate 10; A support frame (40) having one end rotatably coupled to the tilting block (30) and the other end extending above the seat plate portion (10); A fixed block 50 fixed to the support frame 40; A moving block 60 coupled to the backrest 20 and slidably coupled upward and downward with respect to the fixed block 50; And Including; the elastic member 70 for elastically pressing the movable block 60 upward with respect to the fixed block 50, When a pressing force for pushing the backrest 20 backward by a user acts, the backrest 20 moves downward with respect to the fixed block 50, When the pressing force is removed, the chair structure, characterized in that the backrest 20 is moved upward with respect to the fixed block (50) by the elastic member (70). The method of claim 1, The elastic member 70 is a rolling portion 72 coupled to the upper end of the fixed block 50, the rolling spring 72 is wound around the rolling portion 72, one end is connected to the movable block 60 (76) ), The leaf spring (76) is a chair structure, characterized in that for pressing the movable block 60 in the upward direction with respect to the fixed block (50). The method of claim 1, It is coupled to the fixed block 50, and provided with a guide rod (80) extending in the vertical direction of the fixed block 50 to guide the movable block (60), Chair structure, characterized in that the movable block 60 is formed with an insertion hole 62 is inserted into the guide rod (80). The method of claim 3, wherein The fixed block 50 is provided with an accommodating part 52 in which the movable block 60 is accommodated. The guide rod 80 is inserted into the receiving portion 52, both ends are respectively coupled to the upper end and the lower end of the fixed block 50, The movable block 60 is a chair structure, characterized in that for moving between the upper end and the lower end of the fixed block (50). 5. The method of claim 4, The insertion hole 62 is a chair structure, characterized in that the bush 90 is inserted into the sliding contact with the outer peripheral surface of the guide rod (80). 5. The method of claim 4, The guide bar 54 is provided to connect the upper end and the lower end of the fixed block 50, Chair structure, characterized in that the movable block 60 is formed with a guide groove (64) into which the guide bar (54) is inserted.

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