KR200349204Y1 - A braking structure for chair caster - Google Patents

Abstract

The present invention relates to a braking structure of a chair wheel so as to suppress rolling movement by wheels in a housing mounted to a support leg depending on whether a load is applied to the chair.

The present invention is a conventional chair having a wheel freely rotated about an axis formed in the housing, the fixed pole is mounted on the bottom end of the support leg, and at the same time the fixed pole as a shaft to accommodate the wheel The housing is installed to move elastically in the vertical direction is configured to suppress the rolling of the wheel by the load on the chair.

Description

A braking structure for chair caster}

The present invention relates to a braking structure of a chair wheel, and more particularly, to a braking structure of a chair wheel to suppress rolling movement by wheels in a housing mounted on a support leg depending on whether or not a load is applied to the chair. It is about.

In general, at the bottom end of the supporting leg constituting the chair, a wheel structure in which a ball is accommodated in the housing or a disk-shaped wheel is mounted on an axis in the housing is installed to smoothly move the chair. To make it happen.

For example, as disclosed in Korean Utility Model Publication Nos. 87-16355, 88-4424, and the like, a steel ball can be freely rotated in a housing via a vertical axis on the bottom of a support leg of a general chair. In the installations and other publications, such as Japanese Utility Model Nos. 97-812 and 98-064740, a pair of disc-shaped wheels are mounted in a housing in which a shaft is formed, and a vertical shaft on one side of the housing is mounted on a support leg of the chair. Techniques are known so that the cloud movement of the chair can be made smoothly.

In the chair having such a structure, since the steel ball or the disc-shaped wheel installed on the support leg is always in contact with the floor surface and can move the cloud, simply move the chair position or move from the seated person to the adjacent position. It can be effective when moving, but the chair by the wheels cannot suppress movement.

In view of such a point, Korean Patent Publication No. 10-0340292 discloses a chair wheel for preventing the wheels installed on the support legs of the chair from being rotated by the operation of the operation lever.

In other words, the core of this technique is to install the pinion gear inside the wheel in the cover member, and to form a rack portion (gear portion) in the connecting structure operated by the operation lever to engage the pinion gear to suppress the rotation. By doing so, it is possible to prevent the movement of the chair by the wheels.

However, in the chair wheel having such a structure, since the operation lever must be applied artificially to brake or release the wheel, it is quite troublesome for the user and there is a high possibility that it will not be used.

In addition, since the connection structure between the operation lever and the wheel is relatively complicated, it is a factor that greatly increases the manufacturing cost, as well as a problem that easily causes a failure.

The present invention is made in view of the conventional problems as described above, the object of the present invention, when the load is not loaded on the chair is free to move the wheel movement, if the load is loaded on the contrary It is possible to suppress the movement of the chair to ensure that the user feels more stable, and also provides a braking structure of the chair wheel that can be easily applied to the wheel structure of the chair that is being used. have.

1 and 2 is a main configuration diagram for explaining a first embodiment of the braking structure of the chair wheel according to the present invention,

3 and 4 is a main configuration diagram for explaining a second embodiment of the braking structure of the chair wheel according to the present invention,

5 to 7 are main components for explaining a third embodiment of the braking structure of the chair wheel according to the present invention,

8 and 9 are main components for explaining a fourth embodiment of the braking structure of the chair wheel according to the present invention.

<Explanation of symbols for main parts of drawing>

10,20,30,40: Base 11,21,31,41: Fixed pole

11a, 31a, 41a: base 12, 22, 32, 42: housing

12a, 22a, 32a, 42a: axles 13,23,33,43: wheels

14, 24: elastic spring 15a, 15b, 25a: spring bearing

26: stationary body 26a: base plate

34: torsion spring 35: support

35a: shaft 36,44: retaining ring

The present invention for achieving the above objects, in the conventional chair having a wheel that is freely rotated about an axis formed in the housing, the fixed pole is mounted on the bottom end of the support leg, It is characterized in that the housing that accommodates the wheel with the fixed pole as the axis is installed to elastically move in the vertical direction to suppress the rolling movement of the wheel by the load applied to the chair.

An elastic spring is installed on the fixed pole between the bottom of the support leg and the housing via a spring rest, and a support piece is formed at the lower end of the fixed pole to be in close contact with or dropped from the bottom surface.

In addition, the present invention, in a conventional chair having a wheel that is freely rotated about an axis formed in the housing, a fixed pole is mounted on the bottom end of the support leg, and at the same time the wheel is fixed to the fixed pole The housing accommodated is installed to move elastically in the up and down direction, and is configured to restrain the rolling movement of the wheel by the load applied to the chair via a cup-shaped fixture on the fixing pole between these supporting legs and the housing. It is characterized by.

An elastic spring is interposed between a fixing pole between the inner surface of the fixture and the housing, and a supporting piece is formed at the bottom edge of the fixture to be in close contact with or falling off the bottom surface.

In addition, the present invention is a conventional chair having a wheel that is freely rotated about an axis formed in the housing, the support is fixed to the fixed pole which is mounted to the bottom end of the support leg, both ends of the support It is characterized in that the housing that accommodates the wheel to be pivotally rotated around the axis formed in the configured to suppress the rolling movement of the wheel by the load applied to the chair.

A torsion spring is mounted on the shaft to which the support and the housing are connected to provide elasticity to the housing, and the support is mounted between the support piece provided on the fixing pole and the fixing ring.

In addition, the present invention is a conventional chair having a wheel that is freely rotated about an axis formed in the housing, the housing is fixed to the fixed pole mounted on the bottom end of the support leg, the housing shaft It is characterized in that it is configured to be able to suppress the rolling movement of the wheel by the load on the chair by mounting the elastic wheel.

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

1 and 2 are views for explaining a first embodiment of the braking structure of the chair wheel according to the present invention, as shown in these drawings a fixed pole at the bottom end of the support leg 10 constituting the chair ( 11) is fastened, and the housing 12 is fitted in the substantially center lower part of this fixed pole 11, and is installed.

The shaft 12a formed at one side of the housing 12 is mounted with a wheel 13 so as to be able to rotate freely, and the housing 12 is able to move up and down with the fixing pole 11 as an axis. have.

In addition, the elastic spring 14 is inserted into the fixed pole 11 between the bottom surface of the support leg 10 and the housing 12 to impart elasticity to the housing 12, and the elastic spring 14 Both ends of the) is seated in the spring receiving (15a, 15b), by loosening and tightening the spring receiving (15a) of the upper end can adjust the tension force of the elastic spring 14 to some extent.

In addition, the lower end of the fixing pole 11 is provided with a supporting piece 11a having a relatively wide bottom surface, and is configured to be in close contact with or falling off the bottom surface G.

With this arrangement, when the chair is not used, that is, in a state where no load is applied to the chair, the wheels 13 accommodated in the housing 12 as shown in FIG. 1 come into contact with the bottom surface G. At the same time, since the support piece 11a of the fixed pole 11 maintains a certain height at the bottom surface G, the rotation of the wheel 13 is freely made, and thus the chair can be easily moved.

In this state, when the user is sitting on a chair seat (not shown) and a vertical load is applied, the housing 12, which has accommodated the wheels 13, as shown in FIG. 2, is elastically upward against the elastic spring 14 At the same time, the support piece 11a formed at the lower end of the fixed pole 11 is in contact with the bottom surface G.

Therefore, the movement of the chair by the wheel 13 is suppressed and at the same time it is possible to prevent the chair from moving by the support piece 11a of the fixed pole 11, when the user rises from the chair to remove the load As the housing 12 moves downward again by the restoring force of the elastic spring 14, the wheel 13 contacts the bottom surface G, and at the same time, the support piece 11a of the fixing pole 11 is removed from the bottom surface G. Since it will fall, the movement of the chair by the wheel 13 can be moved.

3 and 4 are views for explaining a second embodiment of the braking structure of the chair wheel according to the present invention, as shown in these drawings a fixed pole at the bottom end of the support leg 20 constituting the chair ( 21 is fastened and the housing 22 is fitted in the substantially center lower part of this fixed pole 21. As shown in FIG.

The wheel 22 is mounted on the shaft 22a formed at one side of the housing 22 so that the wheel 23 is free to rotate, and the housing 22 is movable up and down with the fixing pole 21 as the axis. have.

In addition, a cup-shaped fixing body 26 is mounted on the fixing pole 21 between the bottom face of the supporting leg 20 and the housing 22, and between the inner surface of the fixing body 26 and the housing 22. An elastic spring 24 is fitted therein to impart elasticity to the housing 22.

One side of the elastic spring 24 is seated in the spring support 25a, and the tensioning force of the elastic spring 24 can be adjusted to some extent by releasing and tightening the fixing body 26. At the lower end of 26), a supporting piece 26a having a relatively wide bottom surface is provided to be in close contact with or falling off the bottom surface G.

With this configuration, when the chair is not used, that is, in a state where no load is applied to the chair, the wheels 23 accommodated in the housing 22 come into contact with the bottom surface G as shown in FIG. At the same time, since the support piece 26a of the fixed body 26 maintains a certain height on the bottom surface G, the rotation of the wheels 23 is freely performed, and thus the chair can be easily moved.

In this state, when a user is sitting on a chair seat (not shown) and a vertical load is applied, the housing 22, which has accommodated the wheels 23 as shown in FIG. 4, resists the elastic spring 24 and elastically upwards. At the same time, the support piece 26a formed at the lower end of the fixing body 26 is in contact with the bottom surface G.

Therefore, the movement of the chair by the wheels 23 is suppressed and at the same time it is possible to prevent the chair from moving by the support piece 26a of the fixed body 26. As the housing 22 moves downward again by the restoring force of the elastic spring 24, the wheel 23 contacts the bottom surface G, and at the same time, the support piece 26a of the fixing body 26 is removed from the bottom surface G. Since it will fall, the movement of the chair by the wheels 23 is possible.

5 to 7 are views for explaining a third embodiment of the braking structure of the chair wheel according to the present invention, as shown in these drawings a fixed pole at the bottom end of the support leg 30 constituting the chair ( 31) is fastened, and is provided by the fixing ring 36 so that the support body 35 is fitted in the substantially center lower portion of the fixing pole 31 so that the movement in the vertical direction is restricted.

In addition, the lower end of the fixing pole 31 is provided with a support piece 31a having a relatively wide bottom surface, and is configured to be in close contact with or falling off the bottom surface G.

A housing 32 is rotatably mounted in a shaft 35a formed at both ends of the support 35, and a wheel 33 is formed at the shaft 32a formed at one side of the housing 32. It is installed to be free to rotate.

In addition, a torsion spring 34 is mounted on both shafts 35a to which the housing 32 and the support 35 are connected, thereby providing elasticity to the housing 32. Both ends are held by respective engaging pieces 37a and 37b formed in the housing 32 and the support 35.

With this arrangement, when the chair is not used, that is, in a state where no load is applied to the chair, the wheel 33 accommodated in the housing 32 as shown in FIG. 5 contacts the bottom surface G. At the same time, since the support piece 31a of the fixed pole 31 maintains a certain height at the bottom surface G, the rotation of the wheel 33 can be freely performed to easily move the position of the chair.

In this state, when a user is sitting on a chair seat (not shown) and a vertical load is applied, the housing 32, which has accommodated the wheels 33 as shown in FIG. 6, resists the torsion spring 34 to support the support 35. At the same time, the support piece 31a formed at the lower end of the fixed pole 31 is in contact with the bottom surface G while being elastically rotated about the axis 35a.

Therefore, the movement of the chair by the wheel 33 is suppressed and at the same time it is possible to prevent the chair from moving by the support piece 31a of the fixed pole 31, when the user gets up from the chair to remove the load By the restoring force of the torsion spring 34, the housing 32 moves downwardly about the axis 35a of the support 35, and the wheel 33 contacts the bottom surface G, and at the same time, Since the support piece 31a is separated from the bottom surface G, the movement of the chair by the wheels 33 is possible.

8 and 9 are views for explaining a fourth embodiment of the braking structure of the chair wheel according to the present invention, as shown in these drawings a fixed pole (at the bottom end of the support leg 40 constituting the chair) 41 is fastened, and is provided by the fixing ring 44 so that the housing 42 is fitted in the substantially center lower part of this fixed pole 41, and movement in an up-down direction is restrict | limited.

In addition, the lower end of the fixing pole 41 is provided with a supporting piece 41a formed with a relatively wide bottom surface, and is configured to be in close contact with or falling off the bottom surface G.

The wheels 43 are mounted on the shaft 42a formed in the housing 42 so as to rotate freely, and the wheels 43 are made of a material having self-elasticity or supplied air like a general tire. It has elasticity, and when the load applied by the user acts on the wheel 43, the contact surface is slightly distorted.

With this arrangement, when the chair is not used, that is, in a state in which no load is applied to the chair, the wheels 43 accommodated in the housing 42 as shown in Fig. 8 come into contact with the bottom surface G. At the same time, since the support piece 41a of the fixed pole 41 maintains a certain height on the bottom surface G, the rotation of the wheel 43 is freely made, and thus the chair can be easily moved.

In this state, when the user is sitting on a chair seat (not shown) is subjected to a vertical load, as shown in Figure 9 by the self-stretching force of the wheel 43, the contact surface is dent and at the same time the support of the fixed pole 41 The piece 41a is in contact with the bottom surface G, and the rolling movement of the chair by the wheel 43 can be suppressed.

In addition, when the user removes the load from the chair, the circumferential surface is in contact with the bottom surface G by the self restoring force of the wheel 43, and at the same time, the support piece 41a of the fixing pole 41 is the bottom surface G. Since it will fall from the wheels of the chair by the wheel 43 will be able to move.

Although the above-described embodiments are described with respect to the most preferred example of the present invention, it is not limited to the above embodiments, it will be apparent to those skilled in the art that various modifications are possible without departing from the technical spirit of the present invention.

As described above, according to the braking structure of the chair wheel according to the present invention, if there is no load applied to the chair by the user, that is, if the load is not loaded on the chair, the rolling of the wheel is freely made, on the contrary In this case, since the movement of the wheels can be suppressed, the movement of the chair can be prevented reliably so that the user can feel more stable and can be easily applied to the wheel structure of the chair that is used in the past. .

Claims (11)

In a conventional chair having a wheel that is installed freely rotated about an axis formed in the housing, The fixed pole 11 is mounted on the bottom end of the supporting leg 10 and the housing 12, which accommodates the wheels 13, with the fixed pole 11 as the axis moves elastically in the vertical direction. Braking structure of the chair wheel, characterized in that configured to be able to suppress the rolling movement of the wheel (13) by the load applied to the chair. The method of claim 1, characterized in that the elastic spring 14 is installed on the fixing pole 11 between the bottom of the support leg 10 and the housing 12 via spring bearings 15a and 15b. Anti-cloud structure of chair wheels. The method of claim 1 or claim 2, wherein the support piece (11a) is formed at the lower end of the fixed pole 11, the rolling prevention of the chair wheels, characterized in that configured to be in close contact or falling on the floor (G) rescue. In a conventional chair having a wheel that is installed freely rotated about an axis formed in the housing, The fixed pole 21 is mounted on the bottom end of the supporting leg 20, and the housing 22 which accommodates the wheels 23 with the fixed pole 21 as its axis moves elastically in the vertical direction. It is provided, and the rolling movement of the wheels 23 can be suppressed by the load applied to the chair via the cup-shaped fixing body 26 on the fixed pole 21 between the supporting legs 20 and the housing 22. Braking structure of the chair wheel, characterized in that configured so that. 5. A braking structure for a chair wheel according to claim 4, wherein an elastic spring (24) is interposed between a fixed pole (21) between the inner surface of the fixed body (26) and the housing (22). 6. A braking structure for a chair wheel according to claim 4 or 5, wherein a support piece (26a) is formed at the bottom edge of the fixing body (26) to be in close contact with or falling off the floor (G). . In a conventional chair having a wheel that is installed freely rotated about an axis formed in the housing, The support body 35 is fixed to the fixed pole 31 mounted on the bottom end of the support leg 30, and the wheels are pivotally rotated about the shaft 35a formed at both ends of the support body 35. 33) A braking structure for a chair wheel, characterized in that the housing 32 is accommodated and configured to suppress rolling movement of the wheel 33 by a load applied to the chair. 8. The chair wheel according to claim 7, wherein the torsion spring 34 is mounted on the shaft 35a to which the support 35 and the housing 32 are connected to provide elasticity to the housing 32. Braking structure. 9. A braking structure for a chair wheel according to claim 7 or 8, wherein the support (35) is mounted between the support piece (31a) provided on the stationary pole (31) and the stationary ring (36). In a conventional chair having a wheel that is installed freely rotated about an axis formed in the housing, The housing 42 is fixed to the fixed pole 41 mounted on the bottom end of the supporting leg 40, and the wheel 43 having elasticity is mounted on the shaft 42a of the housing 42, Braking structure of a chair wheel, characterized in that configured to suppress the rolling movement of the wheel (43) by the load applied to it. 11. A braking structure for a chair wheel according to claim 10, wherein said housing (42) is mounted between a support piece (41a) provided in said stationary pole (41) and a stationary ring (44).