KR101974037B1 - Hinge unit and arm-rest having the hinge unit - Google Patents

Abstract

The present invention relates to a position setting unit, and an armrest for a chair having the same, wherein the position setting unit comprises: a shaft inserted into a casing to be bi-directionally movable in an axial direction with respect to the casing; and, a locking portion allowing an axial movement of the shaft with respect to the casing or preventing thereof. In the present invention, unlike a prior art, the axial movement of the shaft is prevented by an external manipulation while hinging an arm support beam to a joint beam and connecting the shaft to a hinge region of the joint beam and the arm support beam, and by interlocking therewith, a slope of the arm support beam becomes adjustable. Accordingly, the position of the arm support beam is changeable in various ways depending on a body condition of a seated person and a use state, thereby increasing the convenience of use.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a position setting unit,

The present invention relates to a position setting unit and an armrest for a chair having the same, and more particularly, to a position setting unit and an armrest for a chair having the same, The position of the arm support beam can be varied in various ways according to the body condition and the use state of the seated person by controlling the inclination of the arm support beam with respect to the joint beam by interlocking with the movement of the shaft in the axial direction, A position setting unit for increasing convenience, and an armrest for a chair having the same.

Generally, when a user performs a task while being seated in a chair, or is educated, the user is seated in such a way that his butt is offset at one side of the seat.

The conventional chair has a structure in which a backrest plate and a seat plate are coupled to each other at a predetermined angle, and a leg is coupled to a lower portion of the seat plate so as to stably support the seat plate.

The seat back and the backrest plate are formed to have a cushion member such as a sponge so as to provide a comfortable sitting feeling due to the elasticity of the seat when the user is seated. Further, when the back is turned back so that the user can stretch or lie, Tilting structure.

These chairs are configured to be able to tilt the backrest plate relative to the seat so that the user can support the back of the user even when the user is leaning back from the back.

Particularly, the Korean Registered Utility Model No. 20-0340408 has proposed a height adjuster for a chair armrest.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

Conventional chairs simply adjust or rotate the height of the armrest. When using only the armrest, it is difficult to induce the correct posture such as bending the waist, and there is a limit to satisfying all the seated persons having various physical conditions.

Therefore, there is a need to improve this.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a joint support apparatus, a hinge support apparatus, It is possible to vary the position of the arm support beam according to the body condition or the use state of the seated person by making the inclination of the arm support beam with respect to the joint beam adjustable in conjunction with interlocking the direction movement, And an armrest for a chair having the same.

A positioning unit according to the present invention comprises: a casing; A shaft inserted into the casing so as to be movable in the axial direction in both directions with respect to the casing; And a locking portion for allowing axial movement of the shaft with respect to the casing, or preventing movement.

The locking portion is formed with a main insertion port at one side for shaft insertion of the shaft and is connected to one end of the casing so as to be fixed to the casing so that the inner side surface of the main insertion port A main locker for guiding intermittent movement of the shaft in the axial direction by varying a degree of pressing the circumferential surface of the shaft; An elastic supporting block elastically supported on the other side of the casing; A pusher extending from the elastic supporting block so as to protrude to one side of the casing; And an inner side surface of the main insertion port is pressed against the circumferential surface of the shaft to prevent axial movement of the shaft so that the main locker is initially tilted with respect to the axial direction of the shaft, And a support rib which is moved together with the pusher by an external force.

Wherein the locking portion is spaced apart from the main locker by a predetermined distance in the axial direction of the shaft, and a sub-insertion opening is formed at one side for shaft insertion of the shaft, and a side edge is connected to the casing to fix the position, A throat broker for increasing an urging force of an inner surface of the main insertion port against a circumferential surface of the shaft according to a degree of inclination with respect to an axial direction; And an eccentric block which is rotatably provided on the casing and is eccentrically rotated by interlocking with the pusher so as to be separated from the sub broker when the pusher is operated by an external force, thereby releasing or reducing the binding force of the sub broker with respect to the shaft .

And the elastic supporting block is elastically moved in a direction in which the pusher is pressed by an external force to be pulled.

Wherein the main locker and the sub broker are supported on one side of a supporting block provided on the casing and the main locker is pressed toward the supporting block by a main elastic member elastically supported inside the casing, And the broker is pressed toward the supporting block by a sub elastic member elastically supported on the inside of the casing.

An armrest for a chair according to the present invention comprises: an arm supporting beam connecting an arm pad on an upper side and hinged on a lower side of the joint beam so as to be rotatable; A positioning unit fixed within the arm support beam to allow or adjust the position of the arm support beam with respect to the joint beam; And an operation unit for operating the position setting unit to apply an external force to adjust the angle of the arm support beam.

The position setting unit includes: a casing fixedly mounted inside the arm supporting beam; A shaft inserted through the casing so as to be movable in both directions in the axial direction with respect to the casing and hinged to the hinge connection portion of the arm support beam and the joint beam; And a locking portion for allowing axial movement of the shaft with respect to the casing, or preventing movement.

The locking portion is formed with a main insertion port at one side for shaft insertion of the shaft and is connected to one end of the casing so as to be fixed to the casing so that the inner side surface of the main insertion port A main locker for guiding intermittent movement of the shaft in the axial direction by varying a degree of pressing the circumferential surface of the shaft; An elastic supporting block elastically supported on the other side of the casing; The inner side surface of the main insertion port presses the circumferential surface of the shaft so that the main rocker is initially tilted with respect to the axial direction of the shaft so as to prevent the shaft from moving in the axial direction, A supporting rib which supports and is moved by an external force; A sub-insertion hole is formed at one side of the shaft for axial insertion of the shaft, and a side edge of the sub-insertion hole is connected to the casing so as to fix the shaft, A sub broker for increasing an urging force of the inner surface of the main insertion port against the circumferential surface of the shaft depending on a degree of inclination; And an eccentric block that is rotatably provided in the casing and is eccentrically rotated to be separated from the sub broker by an external force, thereby releasing or reducing the binding force of the sub broker with respect to the shaft.

Wherein the operating portion includes: a wire connected to the elastic supporting block; And a wire connecting the wire and pivotally connected to the arm support beam or the arm pad to allow axial movement of the shaft by elastically pulling the elastic support block through the wire upon rotation, And a lever capable of adjusting the angle of the support beam.

As described above, the position setting unit and the armrest for a chair according to the present invention are different from the conventional art in that the arm supporting beam is hinged to the joint beam and the shaft is connected to the hinge portion of the joint beam and the arm supporting beam It is possible to control the inclination of the arm support beam with respect to the joint beam by interlocking with the movement of the shaft in the axial direction through the operation of the lever by operating the lever so that the position of the arm support beam can be varied So that the convenience of use can be increased.

1 is a perspective view of an armrest for a chair having a position setting unit according to an embodiment of the present invention.
2 is an exploded perspective view of a chair armrest according to an embodiment of the present invention.
3 is an exploded perspective view of a positioning unit according to an embodiment of the present invention.
4 is a cross-sectional view of an armrest for a chair according to an embodiment of the present invention.
5 is an enlarged cross-sectional view of an essential portion of an armrest for a chair according to an embodiment of the present invention.
FIG. 6 is an operation diagram showing a tilt adjustment state of an armrest for a chair according to an embodiment of the present invention.
FIG. 7 is a view illustrating an operation state in which an arm supporting beam is inclined according to a tilt adjustment state of an armrest for a chair according to an embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a positioning unit and an armrest for a chair having the positioning unit according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a perspective view of an armrest for a chair having a position setting unit according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a chair armrest according to an embodiment of the present invention, Fig. 7 is an exploded perspective view of the positioning unit according to the embodiment.

FIG. 4 is a sectional view of an armrest for a chair according to an embodiment of the present invention, and FIG. 5 is an enlarged cross-sectional view of an essential part of an armrest for a chair according to an embodiment of the present invention.

FIG. 6 is an operational view showing a tilt adjustment state of an armrest for a chair according to an embodiment of the present invention. FIG. 7 is a view illustrating a tilt adjustment state of the arm support beam according to the tilt adjustment state of the armrest for a chair according to an embodiment of the present invention. Fig.

1 to 7, an armrest 10 for a chair according to an embodiment of the present invention includes an arm support beam 40, a positioning unit 100, and a manipulation unit 200.

The arm support beam (40) is connected to the joint beam (30) of the chair. At this time, the joint beam 30 is fixedly connected or rotatably connected to a frame or a seat (not shown).

The arm support beam 40 is hingedly connected to the joint beam 30 so as to be vertically rotatable. In addition, the arm supporting beam 40 connects the arm pad 20 to the upper side. At this time, the joint beam 30 and the arm pad 20 can be deformed into various shapes.

Particularly, since the arm support beam 40 can be rotated in the vertical direction with respect to the joint beam 30, the height of the arm support beam 40 can be adjusted according to the size and condition of the body of the seated person sitting on the chair, Convenience is increased.

On the other hand, the positioning unit 100 is fixed inside the arm support beam 40 and serves to allow the angle adjustment of the arm support beam 40 with respect to the joint beam 30 or to fix the position.

The operation unit 200 serves to manipulate the position setting unit 100 to apply an external force to adjust the angle of the arm support beam 40.

In detail, the positioning unit 100 includes a casing 110, a shaft 120, and a locking portion 130.

The casing 110 is fixedly mounted inside the arm support beam 40. Of course, the casing 110 can be deformed into various shapes and fixedly installed inside the arm support beam 40 in various ways.

The shaft 120 is axially inserted into the casing 110 so as to be movable in the axial direction with respect to the casing 110 in both directions. At this time, the shaft 120 is inserted into the casing 110 so as to be reciprocally movable along the axial direction of the arm support beam 40. One side (lower side) of the shaft 120 is hingedly connected to a hinge connection portion of the arm support beam 40 and the joint beam 30. [ Thus, when the arm support beam 40 is pivoted and tilted relative to the joint beam 30, with the casing 110 fixed to the arm support beam 40, May be linearly moved in one direction along the axial direction, or linearly moved in the other direction.

Of course, the shaft 120 may be reciprocally movable in the axial direction with respect to the casing 110.

In addition, the locking portion 130 serves to allow axial movement of the shaft 120 with respect to the casing 110, or to prevent movement thereof. Thus, the arm support beam 40 is adjusted in height by the axial movement of the shaft 120 of the positioning unit 100, and then maintained in the raised and lowered state by the locking unit 130.

The locking portion 130 includes a main locker 131, an elastic supporting block 132, a pusher 133, a supporting rib 134, a sub-broker 135, and an eccentric block 136.

The main locker 131 is formed at one side along the axial direction with a main insertion port 131a for shaft insertion of the shaft 120. [ Then, the main rocker 131 fixes one side edge thereof to the casing 110. To this end, the casing 110 is formed with a main groove 114 on the inner side, and the main locker 131 inserts one side edge into the main groove 114. Particularly, since the shaft 120 inserted into the main insertion port 131a is supported by the casing 110 so as to be exposed to both sides of the casing 110, the main locker 131 is inserted into the main groove 114 It is possible to make a predetermined rotation on the basis of one side.

The main locker 131 varies the degree to which the inner surface of the main insertion port 131a presses the circumferential surface of the shaft 120 according to the degree of inclination of the shaft 120 with respect to the axial direction.

For example, when the axial direction of the main rocker 131 is perpendicular to the axial direction of the shaft 120, the inner surface of the main insertion port 131a does not press the circumferential surface of the shaft 120, The shaft 120 can be moved in the axial direction.

On the contrary, when the axial direction of the main rocker 131 is inclined so as to form an acute angle or an obtuse angle with respect to the axial direction of the shaft 120, the inner surface of the main insertion port 131a presses the circumferential surface of the shaft 120 State, the shaft 120 is prevented from moving in the axial direction.

Therefore, the shaft 120 is moved in the axial direction according to the degree of tilting of the main locker 131. Of course, the main locker 131 can be applied in various shapes and various materials.

In addition, the shaft 120 may have a concave / convex portion 122 formed on the circumferential surface thereof to increase the frictional force with the main rocker 131. When the main rocker 131 is caught by the concave and convex portion 122 and presses the circumferential surface of the shaft 120 beyond a predetermined force, the shaft 120 is more stably prevented from axial movement.

The elastic supporting block 132 is elastically supported on the other side of the casing 110. Particularly, the casing 110 has a main locker 131 on one side and an elastic supporting block 132 on the other side.

At this time, the elastic supporting block 132 is elastically supported by the elastic supporting coil 137 which is elastically supported on the inner surface of the other side of the casing 110. At this time, the elastic supporting coil 137 can be deformed into various shapes.

The pusher 133 is extended from the elastic support block 132 so as to protrude outward from one side of the casing 110. Thus, when the user presses the pusher 133, the elastic supporting block 132 is moved backward in the direction of compressing the elastic supporting coil 137. [ Particularly, the casing 110 is formed with a groove or hole-shaped guide hole 118 on the bottom surface thereof, and the pusher 133 is provided with a guide rib 138 so as to be guided in a linear reciprocating motion stably along the guide hole 118 do. Of course, the guide rib 138 can be deformed into various shapes.

The supporting rib 134 is formed to protrude from the pusher 133 to support the other side of the main rocker 131. Particularly, in order to prevent axial movement of the shaft 120 by pressing the inner surface of the main insertion port 131a against the circumferential surface of the shaft 120, the main locker 131 is initially moved in the axial direction of the shaft 120 The supporting rib 134 supports the other side of the main rocker 131 so as to maintain the inclined state with respect to the main rocker 131. [ Thus, the support rib 134 is moved together with the pusher 133 by an external force.

That is, one side of the main rocker 131 is accommodated in the main groove 114 along the axial direction while the other side is supported by the support rib 134 and is inclined with respect to the axial direction of the shaft 120. As a result, the inner surface of the main insertion port 131a presses the peripheral surface of the shaft 120, so that the shaft 120 is prevented from moving in the axial direction.

When the user pushes the pusher 133, the elastic supporting block 132 is retracted while compressing the elastic supporting coil 137, and the supporting rib 134 is moved backward together with the pusher 133, Is perpendicular to the axial direction of the shaft 120 with respect to the main groove portion 114. [

Thus, the shaft 120 can move in the axial direction due to the reduction or reduction of the pressing force of the inner side surface of the main insertion opening 131a. Thereafter, the user can lift or lower the arm support beam 40 hingedly connected to the joint beam 30. When the user removes the external force pressing the pusher 133, the elastic supporting block 132 is moved in place by the elastic restoring force of the elastic supporting coil 137, so that the main locker 131 is tilted to the initial state, .

 In addition, to increase the restraining force to prevent the shaft 120 from being moved in the axial direction, the broker 135 and the eccentric block 136 are provided.

The sub brochure 135 is spaced apart from the main locker 131 by a predetermined distance in the axial direction of the shaft 120. The sub brochure 135 is formed at one side for shaft insertion of the shaft 120, (110).

That is, the sub broker 135 inserts the shaft 120 into the sub-insertion slot 135a while inserting the one side edge into the sub-groove 116 formed on the inner surface of the casing 110. [ The other side of the broker 135 is held in contact with the elastic support block 132 in the initial state. At this time, the sub broker 135 is disposed obliquely with respect to the axial direction of the shaft 120. Thus, the inner surface of the sub-insertion port 135a presses the circumferential surface of the shaft 120. Particularly, as the inner surface of the sub-insertion port 135a comes into contact with the concave-convex portion 122 of the shaft 120, the shaft 120 is initially pressed against the simultaneous pressurization of the main locker 131 and the broker 135 As shown in Fig.

Of course, the broker 135 can be applied in various shapes and various materials.

The eccentric block 136 is rotatably provided in the casing 110 and pushes the broker 135 toward the elastic support block 132 in an initial state. The eccentric block 136 is eccentrically rotated in the direction in which the sub broker 135 is erected in the direction perpendicular to the axial direction of the shaft 120 in cooperation with the movement of the pusher 133 and the elastic supporting block 132 . That is, the eccentric block 136 is separated from the broker 135 when the pusher 133 and the elastic supporting block 132 are operated by an external force, thereby releasing or releasing the binding force of the broker 135 with respect to the shaft 120 .

Specifically, the eccentric block 136 is rotatably provided on the bottom surface of the casing 110, and initially pushes the other side edge of the broker 135 against the resilient supporting block 132. Particularly, the eccentric block 136 has eccentric pins 139 eccentrically formed on the rotary shaft so as to be eccentric to the rotary shaft. The eccentric pin 139 is connected to the pusher 133. At this time, the eccentric block 136 is eccentrically formed so that the circumferential surface, which initially presses the other side edge of the broker 135, and the eccentric pin 139 are formed at different positions. Therefore, when the pusher 133 and the elastic supporting block 132 are moved by external force, the eccentric pin 139 rotates in conjunction with the pusher 133, so that the eccentric block 136 rotates the broker 135 The pressing force to the elastic supporting block 132 side is removed.

Thus, as the standing broker 135 is raised in a direction perpendicular to the axial direction of the shaft 120, the shaft 120 is allowed to move in the axial direction.

In particular, when the pusher 133 is pushed into the casing 110 or when the elastic support block 132 is moved in the compressing direction of the elastic support coil 137, the main locker 131 and the sub- In a direction perpendicular to the axial direction of the rotor 120.

In addition, the pusher 133 and the elastic support block 132 are connected to each other and moved together in the same direction.

Each of the main locker 131 and the sub broker 135 is held in contact with a supporting block 112 provided in the casing 110. Particularly, the main locker 131 and the sub broker 135 are supported in such a manner that they are respectively placed in a direction perpendicular to the axial direction of the shaft 120 and are respectively fitted to corresponding sides of the supporting block 112.

Of course, the support block 112 can be modified into various shapes.

The main locker 131 is urged toward the supporting block 112 by the main elastic member 131b which is resiliently supported inside the casing 110. The subracker 135 is elastically supported on the inside of the casing 110, And is urged toward the supporting block 112 side by the sub elastic member 135b.

The main elastic member 131b elastically presses one side of the main locker 131 toward the support block 112 side while being elastically supported on one side of the casing 110 so that one side of the main locker 131 is engaged with the main groove 131 114 of the main rocker 131 and to improve the responsiveness of erecting one side of the main locker 131 to the side of the supporting block 112 by being elastically pressed.

The sub elastic member 135b elastically presses one side of the broker 135 toward the supporting block 112 side while being elastically supported on the other side of the casing 110 so that one side of the subcarrier 135 contacts the sub- 116 and to improve the responsiveness of standing up the one side of the standing broker 135 to the side of the supporting block 112 by being elastically pressed.

At this time, the main elastic member 131b and the sub elastic member 135b are coil springs.

On the other hand, the operation unit 200 includes a wire 210 and a lever 220.

The wire 210 is connected to the elastic support block 132 and the lever 220.

That is, a first edge 212 is provided at one side of the wire 210 and is connected and fixed to the elastic supporting block 132. A second edge 214 is provided at the other side of the wire 210, The connection is fixed. Thus, when the lever 220 is operated, the wire 210 is pulled toward the lever 220, so that the elastic supporting block 132 is moved in the direction of compressing the elastic supporting coil 137.

In particular, the lever 220 connects the wire 210 through the second edge 214 and is pivotally connected to the arm support beam 40 or the arm pad 20.

Specifically, the lever 220 includes a first actuating member 222 extending to one side with respect to the hinge pin 221, and a second actuating member 223 extending to the other side with respect to the hinge pin 221 .

The hinge pin 221 serves to rotatably connect the lever 220 to the arm support beam 40 or the arm pad 20.

The second actuating member 223 is formed so as to be operable, for example, by lifting or pressing the user.

Of course, the first actuating member 222 and the second actuating member 223 can be deformed into various shapes.

In addition, the first actuating member 222 is protected by a closure cap 224. The finishing cap 224 surrounds the first actuating member 222 of the lever 220 and is fixedly connected to the arm support beam 40 and the arm pad 20. [ Of course, the finishing cap 224 can be deformed into various shapes.

In particular, the first actuating member 222 forms a straight guide hole 227 to receive the second edge 214 in a linear reciprocating motion. In addition, the first actuating member 222 is resiliently supported by the elastic supporter 228 inside the finishing cap 224. Accordingly, when the first actuating member 222 moves along the arc locus with respect to the hinge pin 221, the second edge 214 moves along the arc locus but is guided by the linear guide hole 227, do. The first actuating member 222 is resiliently supported along the axial direction of the linear guide hole 227 by the elastic supporter 228 to return to the initial position when the external force acting on the second actuating member 223 is removed.

That is, as the lever 220 is activated and allows the axial movement of the shaft 120 by resiliently pulling the resilient support block 132 through the wire 210, the arm support beam 40 is deflected by the joint beam < RTI ID = 0.0 & 30).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the true scope of the present invention should be determined by the following claims.

10: armrest 20: arm pad
30: joint beam 40: arm support beam
100: position setting unit 110: casing
112: Supporting block 120: Shaft
122: concave / convex portion 130:
131: Main locker 131a: Main entrance
132: elastic support block 133: pusher
134: supporting rib 135: standing broker
135a: Sub-insertion hole 136: Eccentric block
200: operating part 210: wire
220: lever 221: hinge pin
222: first operating member 223: second operating member
224: Finishing cap

Claims (9)

Casing; A shaft inserted into the casing so as to be movable in the axial direction in both directions with respect to the casing; And a locking portion for allowing axial movement of the shaft with respect to the casing, or preventing movement of the shaft,
The locking portion is formed with a main insertion port at one side for shaft insertion of the shaft and is connected to one end of the casing so as to be fixed to the casing so that the inner side surface of the main insertion port A main locker for guiding intermittent movement of the shaft in the axial direction by varying a degree of pressing the circumferential surface of the shaft;
An elastic supporting block elastically supported on the other side of the casing;
A pusher extending from the elastic supporting block so as to protrude to one side of the casing; And
The inner side surface of the main insertion port presses the circumferential surface of the shaft so that the main rocker is initially tilted with respect to the axial direction of the shaft so as to prevent the shaft from moving in the axial direction, And a support rib which is supported by the pusher and moved together with the pusher by an external force.
delete The locking device according to claim 1,
A sub-insertion hole is formed at one side of the shaft for axial insertion of the shaft, and a side edge of the sub-insertion hole is connected to the casing so as to fix the shaft, A sub broker for increasing an urging force of the inner surface of the main insertion port against the circumferential surface of the shaft depending on a degree of inclination; And
And an eccentric block which is rotatably provided on the casing and is eccentrically rotated with the pusher to be separated from the sub broker when the pusher is operated by an external force to release or reduce the binding force of the sub broker with respect to the shaft And the position setting unit.
The method according to claim 1 or 3,
Wherein the elastic supporting block is elastically moved in a direction in which the pusher is pressed by an external force to be pulled.
The method of claim 3,
The main locker and the sub broker are supported on one side of a supporting block provided on the casing,
The main rocker is urged toward the supporting block by a main elastic member elastically supported inside the casing,
Wherein the sub broker is pressed toward the supporting block by a sub elastic member elastically supported inside the casing.
An arm supporting beam connected to the upper side of the arm pad and hinged to lower side of the joint beam so as to be rotatable; A positioning unit fixed within the arm support beam to allow or adjust the position of the arm support beam with respect to the joint beam; And an operating portion for operating the position setting unit to apply an external force to adjust the angle of the arm supporting beam,
The position setting unit includes: a casing fixedly mounted inside the arm supporting beam; A shaft inserted through the casing so as to be movable in both directions in the axial direction with respect to the casing and hinged to the hinge connection portion of the arm support beam and the joint beam; And a locking portion for allowing axial movement of the shaft with respect to the casing, or preventing movement of the shaft,
The locking portion is formed with a main insertion port at one side for shaft insertion of the shaft and is connected to one end of the casing so as to be fixed to the casing so that the inner side surface of the main insertion port A main locker for guiding intermittent movement of the shaft in the axial direction by varying a degree of pressing the circumferential surface of the shaft;
An elastic supporting block elastically supported on the other side of the casing;
The inner side surface of the main insertion port presses the circumferential surface of the shaft so that the main rocker is initially tilted with respect to the axial direction of the shaft so as to prevent the shaft from moving in the axial direction, A supporting rib which supports and is moved by an external force;
A sub-insertion hole is formed at one side of the shaft for axial insertion of the shaft, and a side edge of the sub-insertion hole is connected to the casing so as to fix the shaft, A sub broker for increasing an urging force of the inner surface of the main insertion port against the circumferential surface of the shaft depending on a degree of inclination; And
And an eccentric block which is rotatably provided in the casing and is eccentrically rotated so as to be separated from the sub broker by an external force to release or reduce the binding force of the sub broker relative to the shaft.
delete delete The apparatus according to claim 6,
A wire connected to the elastic support block; And
The arm supporting beam or the arm pad is rotatably connected to the arm supporting beam so as to allow the axial movement of the shaft by elastically pulling the elastic supporting block through the wire at the time of rotation, And a lever capable of adjusting the angle of the beam.

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