KR20210079761A - An angle adjusting device for seat of chairs - Google Patents

Abstract

The present invention relates to a chair-seat angle adjustor provided to rotate a front end part of a seat frame (2) provided in the bottom of a seat in a vertical direction with respect to a base frame (1) such that the seat is supported to be rotatable by a hinge shaft (11) to a base frame (1) for a chair seat mounted on the top of a post (100) of a leg part to be rotatable. The chair-seat angle adjustor includes: a gear bar (4) fixing the seat frame to the base frame in an inclined state, and provided in the bottom of the front end part of the seat frame (2) and having sawteeth formed on one side thereof such that a user adjusts the seat to be inclined on an unfixing position; and an angle adjustment part provided in the seat frame (2) such that the inclination of the seat frame can be adjusted with respect to the base frame, to operate a fixing gear (5) to a release position ungeared with respect to the gear bar (4), and a fixing position geared with gear bar (4) in a state in which the inclination of the seat is adjusted. The seat angle adjustor can maintain the seat frame, in which the seat is installed, on a position, in which the seat frame is adjusted by the user to be inclined to a random comfortable angle, which can lead to an improvement in user convenience. According to the present invention, since the gear bar (4) provided in the bottom of the seat frame is operated with the lever (9) to move the fixing gear (5) mounted on a moving rod from the release position to the engagement position such that the seat frame can be fixed and kept inclined, the structure thereof can be simplified, which can lead to an effect of reducing manufacturing costs with a smaller number of components.

Description

Chair seat angle adjustment device {AN ANGLE ADJUSTING DEVICE FOR SEAT OF CHAIRS}

The present invention relates to a chair seat angle adjusting device, and in particular, to reduce fatigue when a user uses a chair for a long time while sitting in a chair, and to set the seat in an optimal neutral position when using the chair for a long time so that there is no risk of impairing spinal health. It relates to a seat angle adjustment device having an improved structure by simplifying the angle adjustment and simplifying the configuration.

In general, the chair is configured so that the seat can be rotated with respect to the leg portion in order for the user to perform work more conveniently, and the backrest is installed with respect to the seat to support the angle from the thigh to the body so that the angle from the thigh to the body is basically 90-110 degrees and the backrest can be reclined with respect to the seat for user's comfort.

In particular, the work chair performs work while the user sits in front of the desk for a long time. In this case, if the user body is maintained for a long time at the seat and backrest angle installed so that the angle from the thigh to the torso is basically 90-110 degrees. It causes fatigue or even pain, and excessive load on the hip joint is maintained for a long time, which is detrimental to the health of the spine and hip joint.

On the other hand, in the structure in which the backrest is reclined with respect to the seat, the user is moved away from the desk or workbench, so that the work cannot be performed smoothly.

In general, it is known that the optimal neutral posture is a sitting angle of about 130 degrees in a chair. For this purpose, if a user who has been seated in a chair for a long time tilts the back back, it interferes with work performance, so a user who has been seated for a long time It is preferable to support the user in a posture in which the spine is aligned so that the user can work comfortably, and to take the optimal neutral posture by adjusting the angle of the seat downward with the waist erect for smooth performance of work. .

For this purpose, as an example of a structure for adjusting the angle of the seat, in Korean Utility Model Publication No. 20-0202223 (registration date August 28, 2000), the upper, lower, and intermediate frames fixed to the lower part of the seat plate are mutually assembled. Disclosed is an adjustment device for adjusting the inclination of the seat plate to be fixed in a state where the seat plate and the backrest are integrally inclined.

However, when the link structure is employed as in the prior art, the structure is complicated and the manufacturing cost is increased.

As an improvement measure for this, Korean Patent Application Laid-Open No. 10-2014-0019295 (published on February 14, 2014) has a frame; a thigh support pivotally mounted to the frame along a first transverse pivot axis, the thigh support having a front portion extending forward of the first pivot axis and a rear portion extending rearward of the first pivot axis; and a pelvic cradle pivotally mounted to the rear portion of the thigh support at a second lateral pivot axis, the pelvic cradle adapted to rotate relative to the thigh support, wherein the pelvic cradle is adapted to rotate relative to the thigh support. It is receptive to the pelvic region of a human being to support the pelvic region and the torso of the user in a vertical alignment regardless of the inclination of the part, and the second pivot axis moves upward and forward as the front part of the thigh support part inclines forward. The thigh support unit and the first pivot shaft and the second pivot shaft balance the weight of the user's pelvis and torso by applying a thigh pressure to the front part of the thigh support part by the user while balancing the weight of the thigh support part and the first pivot shaft and the second pivot shaft. A seating device is disclosed that is positioned and arranged to provide a mechanical advantage of sufficiently adjusting the position of the thigh support relative to the first pivot axis to change the seating angle of the user.

However, in the above-mentioned prior patent, there was a problem of causing cost increase due to the complicated link structure including the pelvic cradle for separate pelvic support and the seat being inclinedly disposed.

Korean Utility Model Publication No. 20-0202223 (Registration date August 28, 2000) Korean Patent Publication No. 10-2014-0019295 (published on February 14, 2014)

An object of the present invention is to solve the problems of the prior art described above, to prevent an increase in manufacturing cost with a simplified structure, and to rotate the lever so that the user can operate it conveniently, centering on the pivot axis with respect to the base frame fixed to the upper end of the leg. To provide an improved chair seat angle adjusting device to raise or lower the front side of the seat frame.

In order to achieve the above object, the chair seat angle adjusting device according to the present invention provides a seat frame provided at the bottom of the seat to rotatably support the seat by a hinge axis on a base frame for a chair seat that is rotatably mounted on the upper end of a leg post. In the seat angle adjusting device provided to rotate the front end of the base frame in the vertical direction,

A gear bar provided on the lower surface of the front end of the seat frame and provided with teeth on one side so that the seat frame is fixed and maintained in an inclined state with respect to the base frame, and the user adjusts the seat to be inclined in the release position;

An angle adjusting part is provided on the seat frame to adjust the inclination of the seat frame with respect to the base frame to operate the fixed gear to the fixed position engaged with the gear bar in the state where the gear bar is disengaged and the seat inclination is adjusted. It is characterized by comprising.

The upper end of the gear bar is connected to a hinge shaft passing through a 'C'-shaped bracket fixed to the lower surface of the front end of the seat frame, and a long hole is formed in the longitudinal direction.

The angle adjusting unit penetrates a fixed gear disposed opposite to the toothed portion of the gear bar, and a long hole formed in the longitudinal direction of the gear bar to move the fixed gear to the gear-engaged fixed position and the gear-disengaged release position with respect to the gear bar. and a rod arranged transversely to the rod, a spring as an elastic means for providing a biasing force to the fixed position with respect to the rod, a cam means for moving the rod to a release position, and a lever for operating the cam means.

The rod includes a tubular member fixed through a support plate fixed downwardly to the front end of the base frame, a first guide member fixed to the end of the tubular member to guide the vertical movement of the gear bar, and a long hole of the gear bar, and A nut is fastened to the threaded portion formed at the end protruding through the tubular support member fixed to the support plate that is spaced apart from the support plate and fixed downward to the front end of the base frame, and one end of the rod is fixed to the tubular support member.

A spring is disposed concentrically outside the rod between the head and the tubular member, which is formed to extend radially as the free end of the rod and is disposed in the tubular member so as to apply an elastic force to the rod.

The cam means includes a bracket having a lever rotatable up and down on a hinge shaft installed through the tubular member laterally inside the free end of the tubular member so as to be in contact with the outside of the head of the rod and provided with a roller at the inner end do.

A chin having a reduced thickness is formed in a long hole on the surface of the gear bar opposite the first guide member, and a second guide member for guiding the vertical movement of the gear bar together with the first guide member is disposed on the chin. and a spring provided in the groove formed on the inner surface of the fixed gear is disposed between the second guide member and the fixed gear with the spring is maintained in a disengaged state spaced apart from the gear bar in normal times when the lever is horizontal. will be listed

When the lever is inclined downward in a state in which the seat frame with the seat is inclined downward, the contact force by the roller is removed as the roller rotates upward together with the bracket in the tubular member, and the elastic force of the spring returns the rod to its original position. The seat frame on which the seat is provided is fixed and maintained at the angle-adjusted inclined position by returning to the position and the fixed gear is in the fixed position meshed with the gear bar.

The chair seat angle adjusting device according to the present invention can be stably maintained at a position where the user tilts the seat frame on which the seat is installed to any comfortable angle, thereby improving ease of use. In addition, the seat angle adjusting device according to the present invention operates the gear bar 4 provided on the bottom surface of the seat frame with the lever 9 to move the fixed gear 5 mounted on the moving rod from the released position to the engaged position. Since the seat frame is fixed and maintained in an inclined state, the structure can be simplified, thereby reducing the number of parts, thereby reducing manufacturing cost.

1 is a schematic side view of a chair employing a chair seat angle adjusting device according to the present invention.
Figure 2 is a perspective view showing the angle adjustment structure applied to the seat frame connected to the base frame fixed to the top of the leg in Figure 1;
Figure 3 is a perspective view seen from one side of the seat frame of Figure 2;
Fig. 4 is a perspective view seen from the opposite side of Fig. 3;
Fig. 5 is a side view viewed from the opposite side of Fig. 2;
Fig. 6 is a front view of Fig. 2;
Fig. 7 is a longitudinal sectional view of the seat frame of Fig. 3 in a released position;
Fig. 8 is a side view showing adjusting the angle of the seat frame with respect to the base frame;
9 is a longitudinal cross-sectional view showing the angle adjustment of the seat frame.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings showing an embodiment of the present invention.

1 to 6, the chair seat angle adjusting device according to the present invention rotatably attaches the seat to the base frame (1) for a chair seat which is rotatably mounted on the upper end of the leg part (100) with a hinge shaft (11). It is provided so as to rotate the front end of the seat frame (2) provided on the bottom surface of the seat to support it in the vertical direction with respect to the base frame (1).

The chair seat angle adjusting device according to the present invention allows the user to adjust the inclination of the seat in the fixed position by fixing and maintaining the seat frame in an inclined state with respect to the base frame so that the user can incline the seat in the fixed position.

To this end, in the chair seat angle adjusting device according to the present invention, the upper end is connected to the hinge shaft 31 penetrating the 'C'-shaped bracket 3 fixed to the lower surface of the front end of the seat frame 2, and the longitudinal direction A long hole 41 is formed and a gear bar 4 with teeth formed on one side is arranged opposite the gear bar 4 to adjust the inclination of the seat, and the gear disengagement release position and the inclination of the seat are adjusted. and an angle adjusting unit configured to operate the fixed gear 5 to a fixed position engaged with the gear bar 4 in the state.

The angle adjusting unit includes a fixed gear 5 disposed opposite to the toothed portion of the gear bar 4, and a fixed gear 5 in a fixed position engaged with the gear bar 4 and a released position in which the gear is disengaged. A rod 6 disposed transversely through a long hole 41 formed in the longitudinal direction in the gear bar 4 to move It includes a spring (7), a cam means (8) for moving the rod to a release position, and a lever (9) for operating the cam means.

The rod 6 includes a tubular member 25 fixed through a support plate 30 fixed downward from the front end of the base frame 1, and a tubular member 25 fixed to the end of the tubular member 25 and fixed to the gear bar ( 4) a first guide member 10 for guiding the vertical movement and a long hole 41 of the gear bar 4, and a support plate fixed downward from the front end of the base frame 1 and spaced apart from the support plate 30 ( A nut 13 is fastened to a threaded portion formed at an end protruding through the tubular support member 12 fixed to 30'), and one end of the rod is fixed to the tubular support member 12, while the free end The tubular member 25 and the head 61 disposed within the tubular member 25 and formed to extend in the radial direction are disposed under the action of the elastic force of the spring 7 disposed concentrically outside the rod. The outer diameter of the threaded portion formed at the end of the rod 6 is formed smaller than the inner diameter of the hole formed in the tubular support member 12, so that the rod is movable laterally in the hole of the tubular support member as will be described later.

The cam means 8 rotates on a hinge shaft 53 installed through the tubular member 25 laterally inside the free end of the tubular member 25 so as to contact the outside of the head 61 of the rod 6 . It is possible and includes a bracket 54 having a lever 9 fixed on the outside and a roller 15 provided at an inner end, the lever 9 being rotatably mounted on a hinge shaft 53 .

In a state in which the lever 9 is horizontally disposed, the roller 15 provided at the inner end of the bracket 54 comes into contact with the head 61 of the rod 6 to counteract the elastic force of the spring 7 to lift the rod. It moves horizontally, thereby causing the fixed gear 5 provided on the rod 6 to disengage with the gear bar 4 .

When the user arranges the lever 9 to be inclined downward, for example, the contact force by the roller 15 is increased as the roller 15 is rotated upwardly together with the bracket 54 in the tubular member 25, for example. As the rod 6 is returned to its original position by the elastic force of the spring 7 as it is removed, the fixed gear 5 becomes a fixed position engaged with the gear bar 4 . The end of the lower bracket 54 provided with the roller 15 becomes a vertical surface, so that, unless the user operates the lever, it is in a fixed position by the vertical end surface of the bracket in contact with the head 61 of the rod 6 . is maintained in

On the surface of the gear bar 4 opposite to the first guide member 10 , a chin part 43 with a reduced thickness is formed in the long hole 41 , and the first guide member 10 is formed on the chin part 43 . ) and a second guide member 20 for guiding the vertical movement of the gear bar 4 is disposed, and the spring 56 provided in the groove 55 formed on the inner surface of the fixed gear 5 is 2 By being disposed between the guide member 20, the fixed gear 5 together with the spring 7 is normally spaced apart from the gear bar 4, that is, it is in a disengaged state.

Adjusting the angle of the seat by the seat angle adjusting device of the present invention will be described with reference to FIGS. 7 to 9 .

7, in the state in which the lever 9 is horizontally arranged, the rod 6 is moved to the right in the drawing together with the head 61 by the roller 15 provided at the tip of the bracket 54, and Together with the elastic force of the spring 56 provided in the groove 55 of the fixed gear 5, the fixed gear 5 mounted on the rod 6 is separated from the gear bar 4 and disengaged. In this disengaged state, since the gear bar 4 is vertically movable, the user can incline the front end of the seat downward as shown in FIG. 8 .

In this way, when the user operates the lever 9 downward as shown in FIG. 9 in a state in which the seat frame 2 is inclined with the seat to a position where the user can take a comfortable posture, the bracket 54 ), the roller 15 provided at the tip of the rod 6 deviates from the head 61 of the rod 6, and the vertical surface under the bracket at a distance shorter than the position of the roller is disposed on the head while the spring disposed inside the head of the rod 6 As the rod is moved to the left in the drawing by the elastic force of (7), the fixed gear 5 fixed to the rod 6 is also moved to the left in the drawing, that is, toward the gear bar 4 and meshes with the teeth of the gear bar. The gear bar 4 is fixed, and thus the seat frame 2 on which the seat is provided is held fixed in the inclined position adjusted by the user.

As described above, the seat angle adjusting device according to the present invention allows the user to conveniently fix and maintain the seat frame in which the seat is installed in a position adjusted to be inclined at any comfortable angle, and the gear bar 4 provided on the bottom surface of the seat frame. By manipulating the lever 9 to move the fixed gear 5 mounted on the moving rod from the released position to the engaged position, the seat frame is fixed and maintained in an inclined state, thereby simplifying the structure.

The present invention can be used to conveniently adjust the inclination angle of the seat so that the user of the chair takes a posture that reduces fatigue while seated on the chair.

1 : Base frame 2 : Seat frame
3: Bracket 4: Gear bar
5: fixed gear 6 ; road
7: spring 8: cam means
9: lever 10; first guide member
12: tubular support member 13: nut
15 ; Roller 20: second guide member
25: tubular member 30, 30': support plate
41: long hole 54: bracket
55: groove 56: spring
61: head 100: leg part support

Claims (8)

The front end of the seat frame (2) provided on the bottom of the seat to support the seat rotatably by a hinge shaft (11) on the base frame (1) for a chair seat rotatably mounted on the upper end of the leg part (100) is attached to the base frame ( In the seat angle adjusting device provided to rotate in the vertical direction with respect to 1),
A gear bar (4) provided on the lower surface of the front end of the seat frame (2) and provided with teeth on one side so that the seat frame is fixed and maintained in an inclined state with respect to the base frame, and in the release position, the user adjusts the seat inclinedly;
It is provided on the seat frame 2 so that the inclination of the seat frame with respect to the base frame can be adjusted, and the gear bar 4 is engaged with the gear bar 4 in a state where the inclination of the seat and the release position disengaged with respect to the gear bar 4 are adjusted. Seat angle adjusting device comprising an angle adjusting unit adapted to operate the fixed gear (5) to the position.
The method of claim 1,
The upper end of the gear bar 4 is connected to a hinge shaft 31 passing through a 'C'-shaped bracket 3 fixed to the bottom surface of the front end of the seat frame 2 and a long hole 41 is formed in the longitudinal direction. Seat angle adjustment device, characterized in that.
The method of claim 1,
The angle adjusting unit includes a fixed gear 5 disposed opposite to the toothed portion of the gear bar 4, and a fixed gear 5 in a fixed position engaged with the gear bar 4 and a released position in which the gear is disengaged. A rod 6 disposed transversely through a long hole 41 formed in the longitudinal direction in the gear bar 4 to move A seat angle adjusting device comprising a spring (7), a cam means (8) for moving the rod to a release position, and a lever (9) for operating the cam means.
4. The method of claim 3,
The rod 6 includes a tubular member 25 fixed through a support plate 30 fixed downwardly to the tip of the base frame 1, and the gear bar 4 fixed to an end of the tubular member 25. ) long hole 41 of the first guide member 10 and the gear bar 4 for guiding the vertical movement, and a support plate 30 spaced apart from the support plate 30 and fixed downwardly to the front end of the base frame 1 '), a nut 13 is fastened to a threaded portion formed at an end protruding through the tubular support member 12 fixed to the tubular support member 12, and one end of the rod 6 is fixed to the tubular support member 12 Seat angle adjustment device with
5. The method of claim 4,
A spring 7 disposed concentrically outside the rod is disposed between the head 61 and the tubular member 25 disposed within the tubular member 25 and formed as the free end of the rod 6 extending in the radial direction. Seat angle adjustment device, characterized in that the elastic force acts on the rod.
5. The method of claim 4,
The cam means (8) is installed by passing through the tubular member (25) laterally inside the free end of the tubular member (25) so as to be in contact with the outside of the head (61) of the rod (6). A seat angle adjusting device, characterized in that it comprises a bracket (54) having a lever (9) fixed to the outside and provided with a roller (15) at an inner end thereof.
5. The method of claim 4,
On the surface of the gear bar 4 opposite to the first guide member 10, a chin portion 43 having a reduced thickness is formed in a long hole 41, and the first guide member 10 is formed on the chin portion 43. ) and a second guide member 20 for guiding the vertical movement of the gear bar 4 is disposed, and the spring 56 provided in the groove 55 formed on the inner surface of the fixed gear 5 is 2 It is disposed between the guide member 20 and the lever 9 is horizontal to maintain the fixed gear 5 together with the spring 7 in a disengaged state spaced apart from the gear bar 4 at normal times. Seat angle adjustment device, characterized in that.
5. The method of claim 4,
When the lever 9 is inclined downward in a state in which the seat frame together with the seat is inclined downward, the roller 15 together with the bracket 54 rotates upward in the tubular member 25. 15) As the contact force is removed, the rod 6 is returned to its original position by the elastic force of the spring 7 and the fixed gear 5 is brought into a fixed position meshed with the gear bar 4 to provide a seat. Seat angle adjustment device, characterized in that fixed and maintained in the angle-adjusted inclined position.

Images