KR200315975Y1 - apparatus for forward locking of a tilting chair - Google Patents

Abstract

The present invention relates to a front locking device of the tiltable chair, and a tilting case having a tilting mechanism coupled therein is installed at a lower side of the seat plate, and a back connector is connected to the tilting mechanism of the tilting case, and the back plate is connected to the back connector. In the connected tiltable chair, the hinge shaft to which the back connector is connected is provided with a back restoring elastic body 38 for restoring the back by applying a restoring force to the back connector while the front locking part selectively restrains the back tilting forward. 60 is coupled, the front locking portion 60 is fixed to the hinge shaft, the locking hole 62 protruding in the radial direction of the hinge axis, and the end of the locking hole so that the locking hole does not rotate in one direction A restraining block 64 for supporting and restraining, a rocking member 68 connected to the restraining block 64, and a hand for rocking the rocking member 68; It consists of 72, there is an effect to the tilting starts when tilted forward bound selectively to load the user to comfortably for a long period of time, such as a computer.

Description

Apparatus for forward locking of a tilting chair}

The present invention relates to a front locking device of the tiltable chair.

In general, the chair is coupled to the back plate and the seat plate at a predetermined angle, and the legs are coupled to the lower side of the seat plate, and the seat plate and the back plate are wrapped by an outer shell in which a cushion member such as a sponge is built, and the user stretches the back plate. In order to make the back tilted back is disclosed a lot of structures that tilt the back.

These chairs are integrally formed with the back plate and the seat plate to be tiltable, or the back plate and the seat plate are made to be tilted separately.

1 shows a conventional tiltable chair. As shown in the drawing, a tilting case 4 having a tilting mechanism coupled thereto is installed at a lower side of the seat plate 2, and a connector 6 is connected to the tilting mechanism of the tilting case 4. The back plate 8 is connected to and erected at 6), and the rotating leg 10 is coupled to the lower side of the tilting case 4.

In the conventional tiltable chair configured as described above, when the user is seated and presses the back plate 8 connected to the connector 6 backward, the entire back plate 8 is pivoted by a predetermined angle around the hinge point A. At this time, since the seat plate 2 is fixed to the tilting case 4, there is no change in position and angle. Then, when the force for pressing the back plate 8 is removed, the back plate 8 and the connector 6 are restored to their original positions by the elastic body (spring or torsion spring) provided in the tilting mechanism.

However, according to the conventional tiltable chair configured as described above, there is a problem that the user does not have a function of restraining the inclination of the back so that the user is uncomfortable for a long time working on the computer.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to selectively restrain the inclination of the back when tilting forward to the front locking device of the tiltable chair to comfort the user using the computer for a long time To provide.

1 is a schematic configuration diagram showing a conventional tiltable chair;

2 is a schematic configuration diagram showing a tiltable chair to which the present invention is applied;

3 is a perspective view showing a tilting mechanism coupled to the inside of the tilting case of FIG. 2;

4 is a perspective view of the front locking part of FIG. 3;

5 is a perspective view of the front locking part of FIG. 4 seen from the rear side;

Figure 6 is a working state of the tiltable chair to which the present invention is applied.

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

12: seat 18: tilting case

20: back 24: first hinge axis

26: second hinge axis 28: third hinge axis

30: 4th hinge axis 32: front link

34: rear link 36: back connector

38: back restoring elastic body 40: tilting range adjustment unit

50: tilting strength adjustment part 60: front locking part

62: hanger 64: restraint block

66: rod 68: rocking member

72: handle 74: elastic member

In the front locking device of the tiltable chair according to the present invention, a tilting case having a tilting mechanism coupled thereto is installed at a lower side of the seat plate, and a back connector is connected to the tilting mechanism of the tilting case, and the back plate is connected to the back connector. In the connected tiltable chair, the hinge shaft to which the back connector is connected is provided with a back restoring elastic body for restoring the back by applying a restoring force to the back connector while a front locking part for selectively restraining the back tilting forward is coupled. The front locking part includes a locking block fixed to the hinge shaft and protruding in a radial direction of the hinge shaft, a restraining block supporting and restraining an end of the locking hole so that the locking hole does not rotate in one direction, a rocking member connected to the restraining block; Characterized in that consisting of a handle for rocking the rocking member do.

The restraint block is movably coupled along the rod to adjust the distance between the restraint block and the swinging member, and an elastic member is inserted between the restraint block and the swinging member to apply an elastic force to the restraint block.

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

Figure 2 is a schematic configuration diagram showing a tiltable chair to which the present invention is applied. As shown, the tilting case 18 is fixed to the rotary shaft 16 of the chair leg 14 at the lower side of the seat plate 12, and the rear side of the seat plate 12 is provided with a back connector, which will be described later. The back plate 20 supporting the back is installed, and both sides of the seat plate 12 are provided with armrests (not shown) which are capable of height adjustment.

The first hinge shaft 24 is hinged to the lower front of the seat plate 12, the second hinge shaft 26 is hinged to the lower rear of the seat plate 12, and the front of the tilting case 18. The third hinge shaft 28 is hinged to the rear, and the fourth hinge shaft 30 is hinged to the rear of the tilting case 18, the first hinge shaft 24 and the third hinge shaft 28 Is connected by the front link 32, the second hinge shaft 26 and the fourth hinge shaft 30 is connected by the rear link 34, the seat plate 12 and the tilting case (18) And the front link 32 and the rear link 34 is a kinematic linkage mechanism is formed.

The front link 32 and the back plate 20 are connected at a predetermined angle by the back connector 36. The back connector 36 is fixed to the upper end of the front link 32, preferably fixed to an outer member (not shown) in contact with the first hinge shaft 24. An upper end of the front link 32 is fixed to the outer member contacting the first hinge shaft 24. The back connector 36 extends from the first hinge shaft 24 to the rear of the chair, leaves the seat plate, is bent upwards, and is a 봉 -shaped rod fixed to the back plate 20, and the first hinge shaft It consists of two rods connected to both sides (two sides of the chair in the width direction) of (24).

3 shows a tilting mechanism coupled to the inside of the tilting case of the tiltable chair to which the present invention is applied. As shown, support portions 18a and 18a 'supporting the third hinge shaft 28 protrude outwards on both sides of the front width direction of the tilting case 18, and the rear side of the tilting case 18. Support portions 18b and 18b 'supporting the fourth hinge shaft 30 are formed to protrude outwards on both sides in the width direction, and a rotating shaft of a tilting range adjustment unit to be described later between the support portion 18a and the support portion 18b. The support part 18c which supports the support, and the support part 18c 'which support the rotating shaft of the front locking part mentioned later are formed.

The middle portion of the third hinge shaft 28 is provided with a back restoring elastic body 38 for restoring the back plate 20 by applying a restoring force to the front link 32 and the back connector 36.

The back restoring elastic member 38 is formed of a torsionally elastic member having a cylindrical shape, and has a structure in which an elastic member such as rubber is filled inside a rigid cylinder (which may be made of a respective cylinder). The back restoring elastic body may have a structure in which an elastic member such as a torsion spring is coupled to a third hinge shaft, or the third hinge shaft itself serves as an elastic member (for example, a torsion spring) to form a back restoring elastic body. .

The third hinge shaft 28 has an angular shaft shape, and the front link 32 is fixed to both ends of the third hinge shaft 28.

The portions of the third hinge shaft 28 and the fourth hinge shaft 30 that are seated on the supporting portions 18a, 18a ', 18b, and 18b' are formed in a cylindrical shape.

On the other hand, as shown, the tilting range adjustment unit 40 for adjusting the tilting range of the back plate 20 is coupled to one side of the third hinge shaft 28, one side of the back restoring elastic body 38 A tilting strength adjusting unit 50 for adjusting the tilting strength by changing the elastic strength of the backrest elastic body may be combined.

And, the other side of the third hinge shaft 28 is coupled to the front locking portion 60 for selectively restraining the inclination of the back plate 20 forward.

As shown in FIGS. 4 and 5, the front locking part 60 is provided with a locking mechanism 62 fixed to the third hinge shaft 28 and protruding in the radial direction of the third hinge shaft 28. It is provided, the restraint block 64 is restrained by the end of the restraint 62 so that the latch 62 is not rotated in one direction, the rocking member via the rod 66 to the restraint block 64; 68 is connected, the structure having a handle 72 for rocking the rocking member (68).

The locking hole 62 is a cam-shaped member fitted to the third hinge shaft 28 and fixed.

The restraining block 64 is a member that receives the bottom of the locking device 62 or is separated from the locking device 62 according to the swinging of the rocking member 68, and is guided by a guide unit (not shown). The confinement block 64 is movably coupled along the rod 66 to adjust the distance between the constraining block 64 and the rocking member 68, and the constraining block 64 and the rocking member 68. ) Between the elastic block 74, that is, the coil spring is applied to the rod 66.

The rod 66 is a member protruding through the restraint block 64, and at its end is formed a turning head 66a for inserting a tool to adjust the movement of the restraint block 64. An elastic member 76, that is, a coil spring is extrapolated between the portion 66a and the restraint block 64 to restrain the restraint block 64.

The restraint block 64 and the rod 66 are coupled to the electric screw, the restraint block 64 is moved in a linear motion in accordance with the rotation of the rod 66.

The rocking member 68 is fixed to the pivot shaft 78 to which the handle 72 is fixed. The guide surface of the guide member 82 is described later on the pivot shaft 78 adjacent to the swing member 68. The cam 84 which slides in contact with is fixed.

The guide member 82 is formed with a guide surface 82a having a curved surface that is in contact with the end surface of the cam 84, the guide surface 82a has a curved surface shape of two consecutive curved surfaces.

In the tiltable chair to which the present invention configured as described above is applied, when the user presses the back plate to sit and tilt the seat plate, the seat plate 12 and the back plate 20 are deformed as indicated by the virtual line in FIG. 6.

Specifically, as the user's back presses the back plate 20, a force is transmitted to the front link 32 through the back connector 36, so that the front link 32 moves the third hinge shaft 28. Rotate clockwise by tilting angle with the center of rotation. At this time, the seat plate 12 connected to the front link 32 by the first hinge shaft 24 is pulled rearward downward, and the rear link 34 rotates clockwise with the fourth hinge shaft 30 as the pivot center. While the parallelogram of the four-link mechanism formed by the seat plate 12, the tilting case 18, the front link 32, and the rear link 34 is crushed, the entire seat plate 12 is rearward downward. Inclined

Therefore, when the seat 12 is tilted downward at the same time during tilting, the path difference does not occur, and the empty space generated behind the back becomes smaller, so that the area of the back of the user is increased and the comfort of the chair is increased. There is no shift pulling of the user's back so that the discomfort such as the top being swept up is eliminated. In addition, because the seat itself is pushed back when tilting, the angle between the knee and thigh is maintained, thus preventing the hamstrings from straining the muscles.

When the force for pressing the back plate 20 is removed, the front link 32 is rotated counterclockwise by the back restoring elastic body provided in the third hinge shaft 28 so that the back plate 20 and the seat plate 12 are rotated. It is restored to its original position.

On the other hand, by adjusting the tilting range adjusting unit 40 to adjust the tilting range of the back plate 20, or by adjusting the tilting strength adjusting unit 50 to adjust the tilting strength.

In addition, the back plate 20 may be prevented from tilting forward by a predetermined angle or more by the front locking unit 60, which is the front locking device of the present invention. As shown in FIG. When rotated, the end surface of the cam 84 is caught by one side of the guide surface 82a of the guide member 82, and the binding block 64 coupled to the rod 66 through the swinging member 68 is caught by the locking hole ( Since the end portion 62 is supported, the third hinge shaft 28 cannot be rotated more than a predetermined angle in a direction opposite to the tilting direction.

When the handle 72 is rotated in the direction opposite to the arrow, the end face of the cam 84 is caught by the other side of the guide surface 82a of the guide member 82, and the rod 66 is connected to the rod 66 through the rocking member 68. Since the coupled restraint block 64 is pulled out at the end of the locking hole 62, the seat plate and the backrest may be inclined forward.

That is, the front locking part 60 is used as a normal chair restrained during normal use, but when the release is released, the seat plate and the back of the chair are inclined forward, thereby maximizing work efficiency.

The present invention is not limited to the above embodiments and can be carried out in various modifications.

According to the front locking device of the tiltable chair according to the present invention, there is an effect of restraining the inclination of the back plate forward when tilting to comfort the user who uses the computer for a long time.

Claims (2)

In a tilting chair having a tilting case in which a tilting mechanism is coupled to the lower side of the seat plate, and a back connector is connected to the tilting mechanism of the tilting case, and the back plate is connected to the back connector. The hinge shaft to which the back connector is connected is provided with a back restoring elastic body for restoring the back plate by applying a restoring force to the back connector while the front locking part selectively restrains the back plate from tilting forward. The front locking part, A locking hole fixed to the hinge shaft and protruding in a radial direction of the hinge shaft; Constraining block for restraining the end of the catch so that the catch does not rotate in one direction; A rocking member connected to the restraining block; The front locking device of the tiltable chair, characterized in that consisting of a handle for rocking the rocking member. The method of claim 1, The restraining block is movably coupled along the rod to adjust the gap between the restraining block and the swinging member, The front locking device of the tiltable chair, characterized in that the elastic member is applied between the restraining block and the swinging member to apply an elastic force to the restraining block.