KR101559889B1 - Hight control apparatus and chair with the same - Google Patents

Abstract

The present invention relates to a height control apparatus and a chair having the same. The height control apparatus comprises: a lever axially coupled to be rotated to one side of a rotation plate provided for a seating unit; a pressing member pressing an opening and closing pin provided for an upper end unit of a cylinder when the lever is rotated to lock or release a contracting motion of the cylinder; and a wire of which both ends are connected to the lever and the pressing member to transmit a rotational force of the lever to the pressing member. Therefore, the height control apparatus is provided for the seating unit without an assembly to enable a user to control height of the seating unit in accordance with a body type or a working condition of the user.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a height adjusting device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height adjusting device and a chair having the height adjusting device, and more particularly, to a height adjusting device for adjusting a height of a seat according to a user's body shape or work environment, and a chair having the height adjusting device.

Generally, the chair includes a seat portion on which a user sits, a leg portion for supporting the seat portion, and a backrest provided on the back of the seat portion and supporting the back of the user.

At the same time, a headrest for supporting the head is provided on the upper side of the backrest, and armrests are provided on both sides of the seatrest or the backrest.

In recent years, living in the chair is increasing, so sitting in the chair for a long time, so there is a lot of back and bones to go to the back and back to protect the habit is recommended to sit in the right attitude.

However, even if the right posture is maintained, if the chair does not fit the body of the user, the back and the back, as well as the neck and the leg are burdened, and the disc and the back pain are generated.

Meanwhile, as an example of a conventional technique for solving such a problem, a chair which adjusts a height of a seat portion, a protruding shape of a backrest, a height of an armrest, and a height of a head pedestal according to a user's body shape has been developed.

For example, the present applicant has filed a patent application and disclosed a technique relating to a backrest, an armrest, and a headrest of a chair in many of the following Patent Documents 1 to 3, and the like.

Patent Document 1 discloses a configuration including a frame formed in a rectangular frame, a seat portion coupled to the front surface of the frame, and an adjustment portion for adjusting the degree of protrusion of the seat portion corresponding to the shape of the waist of the user, A configuration of a backrest for a chair capable of adjusting the degree of protrusion of the seat is described.

Patent Document 2 discloses a method of adjusting the height of a pad portion and a position adjusting portion connected to a lower portion of the position adjusting portion and adjusting a height of the pad portion and a position adjusting portion, And a height adjusting portion are provided to adjust the position and height of the front and rear left and right portions of the armrest by moving the pad portions of the armrests in the front, rear, left and right directions and up and down directions according to the user's body shape.

Patent Document 3 discloses a headrest which supports a user's neck and head and a fixing part which is installed on the backrest of a chair and fixes the headrest so that the height of the headrest can be adjusted and a plurality of fixing protrusions are formed on the headrest, And a headrest for a chair which can easily adjust the height of the headrest.

Korea Patent Registration No. 10-1468703 (issued on December 5, 2014) Korean Patent Registration No. 10-1440918 (issued on September 17, 2014) Korean Patent Registration No. 10-1468704 (Announcement on December 5, 2014)

Meanwhile, the chair according to the related art has an assembly for adjusting the height of the seat portion, the tilting angle of the backrest, and the tension of the backrest according to the user's body shape or work environment.

That is, the assembly includes a bracket rotatably coupled to a body made of a steel material to tilt the backrest, adjust the tension of the backrest when the backrest is tilted using the elastic spring, Adjust the height of the seat by locking or unlocking the cylinder.

As described above, the chair according to the related art requires that the assembly including the lever, the body, and the like be provided separately from the seat portion so as to expand and contract the cylinder in accordance with the rotation operation of the lever.

Accordingly, since the assembly applied to the chair according to the related art is composed of a plurality of parts for performing various functions, the structure is complicated, the number of parts increases, the manufacturing cost is increased, There was a problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a height adjusting device for removing an assembly and adjusting a height of a seat portion provided in a seat portion and a chair having the height adjusting device.

Another object of the present invention is to provide a height adjusting device capable of locking or unlocking the cylinder expansion and contraction operation using a wire and a chair having the same.

In order to achieve the above object, a height adjusting apparatus according to the present invention comprises: a lever which is rotatably coupled to one side of a rotating plate provided on a seat portion; And a wire connected to the lever and the pressing member at both ends thereof to transmit the rotating force of the lever to the pressing member.

The lever includes a handle formed at one lower end, an insertion protrusion formed on the upper surface of the handle and rotatably inserted into the rotation plate, and a fixing part formed at one side of the insertion protrusion and fixing one end of the wire .

Wherein a guide hole is formed in the upper surface of the handle and a guide hole is formed in the rotary plate to guide rotation of the guide protrusion when the lever is rotated in a state where the guide protrusion is inserted, And is limited by the length of the ball.

Wherein a fixed engagement portion is formed at both ends of the wire with a diameter larger than the diameter of the wire, a first engagement slit is formed at one side of the fixed portion to which the wire is coupled, And a first fixing groove in which the formed fixing protrusion is fixed is formed in communication with the first fitting slit.

Wherein a rotation axis portion is formed across the rotation plate at both sides of the central portion of the pressing member and a second engagement slit in which the other end of the wire is coupled to the front end portion of the pressing member, 2 fixing grooves are formed in communication with the second engaging slits.

An elastic member provided on an outer circumferential surface of the insertion protrusion for providing a restoring force to the lever, a stopper for restricting an initial position of the lever, and a fixing member for rotatably fixing the pressing member on the rotation plate. do.

According to another aspect of the present invention, there is provided a chair comprising a height adjusting device including a height adjusting device, a height adjusting device, a seat for a user to sit on, And a leg provided with a cylinder to which the expansion and contraction operation is locked or released by the height adjusting device.

The present invention is further characterized by a backrest disposed on an upper rear portion of the seat portion and a pair of armrests provided on both sides of the seat portion and connecting the backrest to the seat portion to be rotatable to the rear side.

As described above, according to the height adjusting device and the chair having the height adjusting device according to the present invention, the height of the seat portion can be adjusted according to the user's body shape and working conditions by removing the assembly and providing a height adjusting device in the seat portion Is obtained.

According to the present invention, it is possible to lock or unlock the cylinder by using a wire.

Thus, according to the present invention, the assembly is removed to reduce the number of parts and simplify the structure, thereby reducing the manufacturing cost of the chair and improving the workability.

Further, according to the present invention, the backrest is rotatably coupled to the seat portion using the armrest so that the tilting angle of the backrest can be adjusted without adjusting the handle.

1 is a perspective view of a chair having a height adjusting device according to a preferred embodiment of the present invention,
Fig. 2 is an exploded perspective view of the seat portion and height adjusting device shown in Fig. 1,
Fig. 3 is a plan view of the seat portion,
4 is an enlarged exploded perspective view of the height adjusting device shown in FIG. 2,
5 is a cross-sectional view taken along the line A-A 'shown in FIG. 2;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a height adjusting apparatus according to a preferred embodiment of the present invention and a chair having the same will be described in detail with reference to the accompanying drawings.

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

1 is a perspective view of a chair having a height adjusting device according to a preferred embodiment of the present invention.

As shown in FIG. 1, a chair having a height adjusting device according to a preferred embodiment of the present invention includes a seat portion 11 on which a user is seated, a leg portion 12 provided on a lower portion of the seat portion 11, And a height adjusting device 14 provided on the seat part 11 for adjusting the height of the seat part by expanding and contracting the cylinder 13 provided on the upper end of the leg part 12. [

The chair 10 according to the preferred embodiment of the present invention includes a back 15 disposed at the upper rear portion of the seat portion 11 and a back portion 15 provided at both sides of the seat portion 11, A pair of armrests 16 which are connected to the seat portion 11 and a headrest 17 provided at the upper end of the backrest 13.

The legs 12 may include a plurality of legs each provided with a wheel at a lower end thereof.

At the upper end of the leg portion 12, a cylinder 13 which is operated to expand and contract to adjust the height of the seat portion 11 is provided.

The backrest 15 is rotatably coupled to the armrests 16 disposed on both sides in the forward and backward directions, and can be tilted.

The configuration of the seat portion and the height adjusting device will be described in detail with reference to Figs. 2 to 5. Fig.

FIG. 2 is an exploded perspective view of the seat portion and the height adjusting device shown in FIG. 1, and FIG. 3 is a plan view of the seat portion with the seat plate removed. FIG. 4 is an enlarged exploded perspective view of the height adjusting device shown in FIG. 2, and FIG. 5 is a cross-sectional view taken along the line A-A 'shown in FIG.

2 and 3, the seat portion 11 is composed of a seat plate 21 formed in a substantially rectangular plate shape so that a user can sit on the seat portion 11 and a seat portion 21 joined to a lower portion of the seat plate 21, (Not shown).

The seat (21) may be provided with a cushion for comfort when the user is seated.

An insertion hole 23 into which the cylinder 13 is inserted is formed in a central portion of the rotary plate 22 and a circular hole 23 having an upper surface and a lower surface opened to allow the rotary plate 22 to rotate smoothly, Shaped bearing 24 may be provided.

On the upper surface of the rotation plate 22, a plurality of support ribs 25 arranged in the horizontal and vertical directions may be provided so as to form a lattice as shown in FIG.

A mounting hole may be formed in a part of the plurality of supporting ribs 25 so that the wire 32 of the height adjusting device 14 to be described below is installed.

A coupling hole may be formed at a predetermined interval in the outer frame of the rotary plate 22 and a coupling protrusion may be formed on the bottom surface of the seat plate 21 to be coupled to the coupling hole.

The height adjusting device 14 according to the preferred embodiment of the present invention includes a lever 30 which is rotatably coupled to one side of a rotary plate 22, The both ends of the pressing member 31 and the lever 30 are connected to the lever 30 and the pressing member 31 so as to transmit the rotational force of the lever 30 to the pressing member 31 And a wire 32.

The height adjusting device 14 includes an elastic member 33 for providing a restoring force to the lever 30, a stopper 34 for restricting the initial position of the lever 30, and a pressing member 31 (Not shown).

4 and 5, the lever 30 includes a handle 41 formed at one lower end portion, a handle 41 formed on the upper surface of the rear end of the handle 41 and rotatably inserted into the lower surface of the rotary plate 22, And a fixing portion 43 formed on one side of the insertion protrusion 42 and the insertion protrusion 42 for fixing one end of the wire 32. [

A gripping groove 44 may be formed at the center of the handle 41 so that the user can easily grasp it.

The insertion protruding portion 42 is a portion that functions as a rotary shaft during the rotation operation of the lever 30 and is rotatable on the seat plate 21 by an engagement bolt which is inserted through the rotary plate 22, .

A guide protrusion 45 is formed on the upper surface of the handle 41 and a guide protrusion 45 is inserted into the rotation plate 22 so that the rotation of the guide protrusion 45 A guide hole 26 may be formed.

The guide hole 26 is formed into a curved long hole shape corresponding to the rotation locus of the guide projection 45.

Thus, the guide protrusion 45 rotates along the guide hole 26, and the guide hole 26 can restrict the rotation angle of the lever 30. [

For this purpose, it is preferable that the guide hole 26 is formed to have a length corresponding to the rotation angle of the pressing member 31.

At both ends of the wire 32, a fixing protrusion may be formed at a diameter larger than the diameter of the wire 32 so as to be fixed to the lever 30 and the pressing member 31, respectively.

For example, the fixing protrusion may have various shapes such as a spherical shape or a hemispherical shape.

The fixing portion 43 is formed at one side of the rear end portion of the lever 30, for example, in the left direction, and a first engaging slit 46 is formed at one side of the fixing portion 43, A first fixing groove 47 may be formed on the front surface of the fixing portion 43 so as to communicate with the first fitting slit 46. The first fixing groove 47 may be formed with a fixing protrusion formed on one end of the wire 32.

The elastic member 32 is provided as a coil spring so as to be coupled to the outer peripheral surface of the insertion protrusion 42 and both ends of the elastic member 32 can be fixed to the lever 30 and the rotary plate 22, respectively.

The stopper 34 may include a fixing plate 51 formed in a substantially rectangular plate shape and a protrusion 52 protruding from the lower surface of the fixing plate 51.

The protrusion 52 may be formed with an insertion slit 53 into which the wire 32 is slidably inserted by the rotational movement of the lever 30.

Both ends of the stopper 34 are fixed to the rotary plate 22 by fixing bolts.

The pressing member 31 is formed in a substantially rod shape and can be installed on the rotary plate 22 so as to be rotatable along the forward and backward directions.

For this purpose, a rotary shaft portion 61 which functions as a rotary shaft across the rotary plate 22 may be formed on both sides of the central portion of the pressing member 31. [

A second engaging slit 62 to which the other end or right end of the wire 32 is coupled and a second engaging slit 62 to which a fixing protrusion formed at the right end of the wire 32 is fixed, 63 may be formed in communication with the second coupling slit 62.

The rear end portion of the pressing member 31 is a portion for pressing the opening and closing pin 18 of the cylinder 13, and may be formed in a substantially plate shape.

The fixing member 35 is formed in a substantially rectangular plate shape and is fixedly mounted on both sides of the pressing member 31 so as to be downwardly protruded on both sides of the lower surface of the fixing plate 71 and the fixing plate 71, And a support portion 72 for rotatably supporting the formed rotary shaft portion 61.

A pair of guide ribs 73 may be formed on the upper surface of the fixing member 35 to guide the one end of the wire 32 to be connected to the pressing member 31 via the fixing member 35.

Next, the combination of the height adjusting device and the chair having the height adjusting device according to the preferred embodiment of the present invention and the operation method thereof will be described in detail.

The operator assemble the height adjusting device 14 to the rotary plate 22 of the seat portion 11. [

First, the worker installs the wire 32 on the rotary plate 22.

The wire 32 is installed through the installation hole of the support rib 25 formed in a lattice shape on the upper surface of the rotation plate 22. Both ends of the wire 32 are respectively connected to the center of the rotation plate 22, (30) is installed.

That is, the lever 30 is disposed on one side of the rotation plate 22, and the insertion protrusion 42 of the lever 30 is fastened through the rotation plate 22 in a state where the elastic member 33 is provided on the outer circumferential surface And is rotatably assembled by a coupling bolt.

The guide protrusion 45 of the lever 30 is inserted into the guide hole 26 formed in the rotary plate 22 and rotates along the guide hole 26 during the rotation operation of the lever 30.

Thus, the angle of rotation of the lever 30 is limited by the length of the guide hole 26.

One end of the wire 32, for example, the left end thereof is inserted into the fixing portion 43 through the first engaging slit 46 of the fixing portion 43 provided at one side of the lever 30, The fixing protrusion formed on the left end is inserted and fixed in the first fixing groove 47 formed on the front surface of the fixing portion 43.

The left side portion of the wire 32 is inserted into the insertion slit 53 formed in the protruding portion 52 of the stopper 34 and the stopper 34 is fixed to the upper surface of the rotary plate 22 using the fixing bolt.

At this time, the lever 30 is disposed at the initial position set by the stopper 34 in advance.

Subsequently, the worker places the rear end of the pressing member 31 on the upper portion of the insertion hole 23 formed at the center of the rotary plate 22, disposes the fixing member 35 on the upper portion of the pressing member 31, And the fixing member 35 is fixed to the rotary plate 22 using a bolt.

The pressing member 31 can rotate around the rotary shaft portion 61 as the rotary shaft portion 61 formed on both sides of the pressing member 31 is supported by the rotary plate 22 and the support portion 72 of the fixing member 35 .

At this time, the other end, that is, the right end of the wire 32 is disposed along the space between the pair of guide ribs 73 formed on the upper surface of the fixing portion 43 and the second joining slit 62 of the pressing member 31 And the fixing protrusion formed at the right end of the wire 32 is fixedly coupled to the second fixing groove 63 formed at the front end of the pressing member 31. [

Thereafter, the worker joins the seat plate 21 to the upper portion of the rotary plate 22, assembles a pair of armrests 16 on both sides of the rotary plate 22, and then, between the pair of armrests 16 The backrest 15 is rotatably assembled.

Finally, the operator assemble the cylinder 13 and the leg portion 12 at the lower portion of the rotary plate 22, and assemble the head pedestal 17 at the upper end of the back 15.

When the assembly of the chair is completed through the above process, the user can adjust the height of the seat portion 11 by rotating the lever 30 about the insertion protruding portion 42.

That is, the wire 32 connected to the left end of the lever 30 is pulled toward the lever 30 by the rotation operation of the lever 30 and is slidably moved.

5, the pressing member 31 connected to the right end of the wire 32 rotates around the rotating shaft portion 61 formed on both sides, and the opening / closing pin 18 ).

As a result, the locking and unlocking state of the cylinder 13 is released, and the user can adjust the height of the seat portion 11. [

Then, when the operation of the user is released, the lever 30 is rotated to the inside of the seat portion 11 by the restoring force of the elastic member 33, and returned to the initial position by the stopper 34. [

At this time, as the wire 32 is returned to the initial position, the pressing member 31 is rotated and returned to its original position, and the cylinder 13 is set in the expansion and contraction locking state.

On the other hand, as the backrest 15 is rotatably coupled with the pair of armrests 16, the user can press the backrest 15 backward without manipulating the knob to adjust the tilting angle of the backrest 15.

According to the above-described process, the height adjustment device for adjusting the height of the seat portion can be installed inside the seat portion to adjust the height of the seat portion according to the user's body shape and work environment.

Although the invention made by the present inventors has been described concretely with reference to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

The present invention is applied to chair technology for adjusting the height of a seat portion according to a user's body shape or work environment by using a height adjusting device installed in a seat portion.

10: Chair 11: Seat
12: leg portion 13: cylinder
14: height adjustment device 15: backrest
16: Armrest 17: Headrest
18: opening / closing pin 21:
22: rotation plate 23: insertion hole
24: bearing 25: support rib
26: Guide ball
30: lever 41: handle
42: insertion protrusion 43:
44: gripping groove 45: guide projection
46: first engaging slit 47: first fixing groove
31: pressing member 61:
62: second engaging slit 63: second fixing groove
32: wire 33: elastic member
34: Stopper 51: Fixing plate
52: protrusion 53: insertion slit
35: Fixing member 71: Fixing plate
72: Support portion 73: Guide rib

Claims (8)

And a fixing part formed at one side of the insertion protrusion and fixing one end of the wire, the protrusion being formed at a lower end of the rotation plate, the insertion protrusion protruding from the upper surface of the knob, A lever that is axially coupled to one side of the housing,
A pressing member which presses an opening / closing pin provided at an upper end portion of the cylinder to lock or release the expansion and contraction operation of the cylinder during the rotation operation of the lever,
A wire connected to the lever and the pressing member at both ends so as to transmit rotational force of the lever to the pressing member,
An elastic member provided on an outer circumferential surface of the insertion protrusion and providing a restoring force to the lever,
A stopper for restricting an initial position of the lever and
And a fixing member rotatably fixing the pressing member to the rotating plate. delete The method according to claim 1,
A guide protrusion is formed on an upper surface of the handle,
A guide hole for guiding rotation of the guide protrusion when the lever is rotated in a state where the guide protrusion is inserted into the rotary plate,
Wherein a rotation angle of the lever is limited by a length of the guide hole. The method according to claim 1,
Wherein a fixing protrusion is formed at both ends of the wire with a diameter larger than the diameter of the wire,
A first coupling slit to which the wire is coupled is formed on one side surface of the fixing portion,
And a first fixing groove, in which a fixing protrusion formed on one end of the wire is fixed, is formed in a front surface of the fixing portion in communication with the first fitting slit. 5. The method of claim 4,
A rotating shaft portion is formed on both sides of the central portion of the pressing member across the rotating plate,
Wherein a second fixing slit is formed in a front end portion of the pressing member so as to communicate with the second fitting slit, wherein a second fitting slit to which the other end of the wire is engaged and a fixing protrusion formed at the other end of the wire are fixed, Regulating device. delete The height adjusting device according to any one of claims 1 to 5,
A seat portion in which the height adjusting device is provided and a user is seated,
And a leg provided at a lower portion of the seat portion and provided with a cylinder at an upper end thereof to be locked or unlocked by the height adjusting device. 8. The method of claim 7,
A backrest disposed at an upper rear portion of the seat portion,
And a pair of armrests provided on both sides of the seat portion and connecting the backrest to the seat portion in a rotatable manner to the rear side.

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