KR20040092715A - Operating apparatus of gas cylinder with cable - Google Patents

Abstract

PURPOSE: An operating structure of a gas cylinder operable by a cable is provided to allow a user to operate the gas cylinder more conveniently and perform a coupling work more simply at a production site. CONSTITUTION: The operating structure comprises: a cable(13) one end of which is pulled by a user's external force; a release arm(11) having a cable stopping portion and a rotation center portion formed integral with each other and being rotated around the rotation center portion by being pulled by the cable(13); and a taper holder(12) having an arm guide portion and an arm stopping end formed integral with each other and being inserted into a tapered portion inside the upper end of a gas cylinder.

Description

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

[0001] The present invention relates to an operating structure of a gas cylinder operated by a cable, and more particularly, to a gas cylinder operated by a cable such that a gas release pin is operated by a predetermined button formed at a convenient position for a user to operate, Thereby enabling the user to more conveniently use the gas cylinder.

The gas cylinder is a mechanism used between the seat and the chair base to adjust the height of the seat. In addition, the gas cylinder can be applied to various other apparatuses such as a shock buffer mechanism of a vehicle, as well as adjusting the height of a chair seat.

The general construction of the conventional gas cylinder is disclosed in Korean Patent Application No. 10-1998-0028313, entitled " Device for controlling the height of a gas cylinder type chair, " filed by the applicant of the present invention, The structure is clear.

However, in the conventional gas cylinder, since the gas opening / closing pin must be operated up and down by a separate handle formed on the lower side of the seat of the chair, the user has to bend the waist to operate the handle, There was a dot.

In order to solve such inconveniences, Korean Patent Application No. 10-1998-0026546, entitled " Chair height control member ", which has already been patented by the applicant of the present invention, Can be illustrated.

The above-mentioned "height adjustment member for a chair" is a gas cylinder operated by a cable. The gas cylinder is further provided with a separate button that is arranged in parallel with a certain structure exemplified by an armrest of a chair, So that the gas cylinder can be operated up and down.

With this configuration, the user can adjust the height of the chair by a simple operation of pressing the button by hand without bending the waist.

However, such a conventional "chair height adjusting member" has the following problems.

First, since the mechanism is complicated and a large number of various parts are used, the fastening process of the parts is difficult. Further, since a large number of parts are used, there is a problem that the manufacturing cost thereof is increased.

In addition, since it has a complicated structure, when repeatedly used continuously, there is a problem that breakdown frequently occurs.

The present invention proposes an operation structure of a gas-operated gas cylinder that can solve the above-described problems, enable a user to operate the gas cylinder more conveniently, and can perform a clamping operation more simply at a production site .

Another object of the present invention is to provide an operation structure of a gas cylinder operated by a cable capable of further increasing the reliability and stability of operation of the gas cylinder.

Another object of the present invention is to propose an operation structure of a gas cylinder operated by a cable which can further reduce the manufacturing cost of the gas cylinder.

1 is a sectional view of a gas cylinder according to the present invention;

2 is a sectional view of a release arm in a gas cylinder according to the invention;

3A is a plan view of a taper holder according to the present invention.

FIG. 3B is a cross-sectional view of the taper holder according to the present invention, taken along line A-A 'in FIG. 3A. FIG.

3C is a cross-sectional view of the taper holder according to the present invention, taken along the line B-B 'in FIG. 3A.

Fig. 4 is a view for explaining the operation of the present invention, in which an external force is not applied to the gas opening / closing pin; Fig.

Fig. 5 is a view for explaining the operation of the present invention, in which an external force is applied to the gas opening / closing pin; Fig.

Description of the Related Art

1: Base tube 2: Spindle 201: Tapered part

3: Cylinder 4: Piston 5: Piston rod

6: Fixing clip 7: Tube guide 8: Bushing

9: Valve 91: O-ring 10: Gas opening / closing pin

11: Release arm 12: Taper holder 13: Cable

14: first chamber 15: second chamber 16: cable holder

21: rotation center portion 22: pin pressing portion 23: vertical interval holding portion

24: Horizontal interval maintaining part 25: Cable catching part 26: Cable catching step

27: cable insertion hole 31: arm insertion hole 32: arm guide portion

321: Lower arm guide portion 322: Upper arm guide portion

33: arm clamping end 34: guide surface 35: cable insertion groove

In order to accomplish the above object, an operation structure of a gas-operated gas cylinder according to the present invention comprises a cable, one end of which is pulled by an external force of a user; A cable clamping portion having the other end fixed to the upper side of the cable and a rotation center portion formed below the cable clamping portion are integrally formed and rotated about the rotation center portion by an operation pulled by the cable, A release arm for pressing a gas opening / closing pin for selectively operating a gas flow of the gas; And an arm guide portion formed on the inner circumferential surface of the arm guide portion so as to form an arm insertion hole therein for inserting the release arm therein, and an arm receiving end for receiving the rotation center portion when the release arm is operated And a tapered holder which is inserted into a tapered portion inside the upper end of the gas cylinder.

The operation structure of the gas cylinder operated by the cable as described above has the effect of simplifying the user's convenience as well as the production process at the production site.

Further, by simplifying the structure of the gas cylinder, it is possible to increase the stability and reliability of operation of the gas cylinder, and further reduce the manufacturing cost thereof.

Hereinafter, a specific embodiment according to the present invention will be described. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. .

1 is a sectional view of a gas cylinder according to the present invention.

1, a gas cylinder according to the present invention comprises a hollow tube-shaped base tube 1, a hollow tube-shaped spindle 2 to be inserted into a hollow portion in the base tube 1, A tube guide 7 and a bushing 8 inserted into the contact surface between the tube 1 and the spindle 2 for smoothly moving the spindle 2 up and down, And a second chamber 15 which is in contact with the inner circumferential surface of the cylinder 3 so that the gas filling space inside the cylinder 3 is separated into the upper and lower first and second chambers 14 and 15 A piston rod 5 having one end fixed to the piston 4 and extending downward and the other end fixed to a lower end of the base tube 1; A fixing clip 6 for fixing the other end to the base tube 1, A valve 9 inserted into the spindle 2 at approximately the upper side of the spindle 2 so as to allow the flow of gas to be selectively manipulated and a valve 9 connected to the outer peripheral surface of the valve 9 and the spindle 2 and / At least one O-ring 91 interposed on the contact surface of the cylinder 3 so as to maintain the airtightness between the inner circumferential surface of the cylinder 3 and the gas opening / closing pin 10 inserted into the open part of the center of the valve 9, A taper holder 12 which is further formed on the upper side of the gas opening and closing pin 9 and an upper end of the gas opening and closing pin 10 are pressed and the stop position and movement thereof by the taper holder 12 A release arm 11 which is guided and a cable 13 for operating the release arm 11 are included.

The base tube 1, the spindle 2, the cylinder 3, the release arm 11, the taper holder 12, the valve 9 and the like are supported by the high pressure of the gas filled in the cylinder 3 , A metal material can be used so as not to be damaged by the stress applied by the weight of the user who uses the chair. The valve 9 is made of metal. However, it can not be said that the material is limited by metal, and even if plastic is used, there is no restriction on its use.

One end of the cable 13 is connected to the release arm 11 and the other end is connected to a predetermined button. Illustratively, the button structure of the prior art, which is installed in the armrest portion of the chair, can be equally used. However, the structure of the button formed at the other end of the cable 13 is merely exemplary, and the structure for pulling the cable 13 is not limited as long as the cable 13 can be pulled within a predetermined length, Other than the field associated with the cylinder, it is also known that another cable pulling structure is applied.

Further, a cable holder 16 fixed to the upper end of the taper holder 12 is further formed to guide the position of the cable 13.

The valve 9 is adapted to allow at least a portion thereof to be inserted into the tapered portion 201 when the radius thereof is reduced and tapered on the spindle 2. By such constitution, there is an effect that the width of the piston 4 can be increased up and down.

Specifically, the upper and lower lengths of the base tube 1 and the spindle 2 are maintained unchanged, and the installation position of the valve 9 further moves upward from the inside of the spindle 2, 201, so that the piston rod 5 is longer than the conventional one and the length of the piston rod 5 is made longer by the moving position of the valve 9. With this configuration, the movement stroke of the entire gas cylinder can be made larger. In other words, the entire length of the gas cylinder determined by the base tube 1 and the spindle 2 remains the same while preventing the piston 4 from interfering with the valve 9 in moving up and down, Can be made longer. As a result, it becomes possible to realize longer vertical strokes in the same gas cylinder size.

On the other hand, the release arm 11 is rotated around a predetermined rotation center axis so that the gas opening / closing pin 10 is operated. Particularly, the release arm 11 does not include a fixed shaft structure as a predetermined central axis for fixing the position thereof or fixing the rotation center axis, but a constant shaft (not shown) formed inside the taper holder 12 Its position can be specified only by an operation inserted into the space. The lower side of the release arm 11 is supported by the gas opening / closing pin 10.

The tapered holder 12 includes the release arm 11 in the inner space and is inserted into the tapered portion 201 at the upper end of the spindle 2. More specifically, the release arm 11 is inserted into the taper holder 12 and the position of the release arm 11 is set, and the operation of the release arm 11 is completed. It is possible.

The cable 13 to be inserted into the release arm 11 is fixed to the end of the release arm 13 after passing through the release arm 13 or is released by the stopper 111, And is placed on the arm 11.

The operation of the gas cylinder according to the above configuration will be schematically described.

In a state in which the release arm 11 is not operated because the cable 13 is not pulled, the gas opening / closing pin 10 is raised, and the gas does not flow.

However, when the cable 13 is pulled by an external force, the release arm 11 is moved to the left with reference to Fig. 1, and the gas opening and closing pin 10 is pressed. The gas filled in the cylinder 3 is moved from the first chamber 14 to the second chamber 15 through the microtubes formed in the cylinder 3 when the gas opening / closing pin 10 is pressed The spindle 2 and the cylinder 3 descend downward. At the same time, the entire length of the gas cylinder is reduced, and the seat of the chair is moved downward.

Then, after the height of the seat of the chair is adjusted to the desired height, the force of pulling the cable 13 is released to stop the gas movement between the chambers 14 and 15. When the movement of the gas is stopped, the movement of the gas cylinder in the vertical position is stopped, and the position of the chair seat is fixed. On the other hand, when the external force pulling the cable 13 is removed, the position of the gas opening / closing pin 10 is moved upward by the pressure applied by the high-pressure gas in the first chamber 14, The positions of the release arm 11 and the cable 13 can be restored to their original positions.

Hereinafter, the configuration of the release arm 11 and the taper holder 12 will be described in detail.

2 is a sectional view of a release arm according to the present invention.

Since the release arms can be formed with the same thickness on all sides, only the sectional view will be described.

The release arm 11 has a rotation center portion 21 having a tapered end at its lower end and serving as a rotation center and a pin pressing portion 22 having a gently curved shape at substantially opposite sides of the rotation center portion 21 A horizontal spacing portion 24 extending upward from the pin pressing portion 22 and formed by bending in a substantially horizontal direction in the vertical spacing portion 23, And a cable catching portion 25 that is further extended upward from the gap retaining portion 24 is included.

The cable catching portion 25 includes a cable catching end 26 formed at one side of the cable catching portion 25 so as to fix the end of the cable, And a cable insertion hole 27 formed by piercing the engaging portion 25. Although a predetermined stopper (see 111 in FIG. 1) may be placed in the cable catching portion 25 to prevent the cable (see 13 in FIG. 1) from falling out, it is not necessarily indispensable.

3A is a plan view of a taper holder according to the present invention, and FIG. 3B is a cross-sectional view of the taper holder according to the present invention, taken along line A-A 'of FIG. 3A. 3C is a cross-sectional view of the taper holder according to the present invention, taken along the line B-B 'in FIG. 3A.

3A, 3B, and 3C, the release arm 11 may be inserted into the taper holder 12 having a predetermined shape to a certain extent larger than the thickness of the release arm 11, An arm guide portion 32 which forms both side walls of the arm insertion hole 31 and an end portion of the rotation center portion (see 26 in FIG. 2) An arm engaging end 33 which is operated as a center point of the rotation of the arm 11 and a pin pressing portion 33 for interfering with the rotation of the release arm 11 A guide surface 34 which is a portion curved in a specific shape similar to the movement position of the arm portion 22 and a cable insertion groove 35 which is recessed from the upper end of the arm guide portion 32.

A cable holder 16 having a predetermined hole therein is fixed to the cable insertion groove 35 to guide the position of the cable.

Specifically, the arm guide portion 32 includes a lower arm guide portion 321 into which at least a part of the rotation center portion 21, the pin pressing portion 22 and the vertical gap holding portion 23 of the release arm 11 is inserted. Is formed. An upper arm guide portion 322 into which at least a part of the cable holding portion 25, the horizontal gap holding portion 24, and the vertical gap holding portion 23 is inserted is formed.

The relationship between the release arm 11 and the taper holder 12 will be described.

The vertical gap holding portion 23 which is a part of the release arm 11 is configured such that the release arm 11 moves upward from the forming range of the lower arm guide portion 32 and the release arm 11 moves forward and backward . Particularly, the vertical interval holding portion 23 can swing back and forth within the range of the width of the arm insertion hole 31 (see the interval "B" in FIG. 3B).

The vertical interval holding portion 23 can increase the moment by increasing the distance between the cable holding portion 25 and the pin pressing portion 22 so that the external force applied to the cable holding portion 25 So that the pin pressing portion 22 is provided with a greater force. Thus, even when the pulling force of the cable locking portion 25 is small, the force applied to the pin pressing portion 22 is increased to a certain extent, so that reliability in operation of the gas cylinder can be improved.

The horizontal spacing portion 24 may be formed by bending the horizontal spacing portion 24 from the vertical spacing portion 23 in a substantially horizontal direction, So that the operating width can be ensured smoothly. When the release arm 11 is pulled to the maximum position, the upper end of the release arm 11 is prevented from interfering with the upper arm guide portion 322 when the horizontal gap holding portion 24 is not formed, It is formed to prevent such interference.

The mutual operation of the release arm 11 and the taper holder 12 will be described.

The release arm 11 is inserted into the lower side of the taper holder 12, and is located in the arm insertion hole 31. At this time, since the portion opened to the lower side of the arm insertion hole 31 is formed to be larger than the release arm 11, the release arm 11 is not interfered with the insertion.

When the release arm 11 is seated in the arm insertion hole 31, the pin pressing portion 22 is brought into contact with the guide surface 34 so that one side of the release arm 11 is stably supported. The rotation center portion 21 is in contact with the arm engagement end 33, and the other side of the release arm 11 is stably supported. The position of the release arm 11 can be stably maintained as a whole by supporting the weight of the release arm 11 by placing the gas opening and closing pin 10 on the lower side of the release arm 11 have.

When the position of the release arm 11 is changed, the contact state between the pin pressing portion 22 and the guide surface 34 and the contact state between the rotation center portion 21 and the arm engagement end 33, The release arm 11 can be stably operated while the position of the release arm 11 is guided. Particularly, since the rotation center portion 21 is engaged with the arm engagement end 33, the rotation center portion 21 as a whole is operated as a center point for rotation of the release arm 11.

In addition, in the release arm 11, since the arm insertion hole 31 is thicker than the release arm 11, the operation of the release arm 11 can be made freely to some extent.

Fig. 4 is a view for explaining the operation of the present invention, in which an external force is not applied to the gas opening / closing pin. Fig.

4, when an external force is not applied by the user, the cable 13 is not pulled, and the release arm 11 is rotated clockwise around the rotation center portion 21. As shown in Fig.

In this state, the state in which the pin pushing portion 22 does not press the gas opening / closing pin (see 10 in Fig. 1) and the gas between the chambers 14 and 15 is not allowed to flow. Therefore, the up and down movement of the gas cylinder is stopped.

5 is a view for explaining the operation of the present invention, and is a view for explaining a state in which an external force is applied to the gas opening / closing pin.

5, when an external force is applied by the user, the cable 13 is pulled, and the release arm 11 is rotated in the counterclockwise direction about the rotation center portion 21. As shown in FIG.

In this state, the pin pressing portion 22 is in a state in which it presses the gas opening and closing pin (see 10 in FIG. 1), and the gas flow between the chambers 14 and 15 is possible. Therefore, the gas cylinder can be operated up and down. That is, when the user sits on the chair seat, the spindle moves downward to shrink the gas cylinder, and if the user does not sit on the seat, the spindle moves upward to extend the gas cylinder.

Particularly, in operation of the release arm 11, the lower side surface of the curved portion of the pin pressing portion 22 presses the gas opening / closing pin 10, and the bent portion 22 of the pin pressing portion 22 The side surface is in contact with the guide surface 34, so that the release arm 11 is stably operated. The rotation center portion 21 is engaged with the arm engagement end 33 so that the release arm 11 does not change its position due to the translational movement or is minute, Only rotational motion can occur.

The movement of the release arm 11 can be supported by the tapered holder 12 without any additional configuration. In addition, when the release arm 11 is not operating and is stopped, the self-weight of the release arm 11 can be supported by the gas opening / closing pin 10, so that the release arm 11 can be stably positioned .

According to the present invention, the gas cylinder can be more conveniently operated by the user, and the assembling operation of the gas cylinder can be performed more simply at the production site.

Further, according to the present invention, operational reliability and stability of the gas cylinder can be further improved, and the gas cylinder can be operated even with a simple mechanical configuration. Further, the manufacturing cost of the gas cylinder can be further reduced.

Claims (10)

A cable once drawn by the external force of the user; A cable catch portion having the other end of the cable fixed to the upper side, and a rotation center portion formed below the cable catch portion, A release arm which is rotated about the rotation center portion by an operation pulled by the cable; An arm guide portion having a side wall of the arm insertion hole formed therein for inserting the release arm therein, and an arm engagement protrusion protruding from the inner circumferential surface of the arm guide portion and engaged with the rotation center portion when the release arm is operated , And a tapered holder inserted into the tapered portion of the upper end of the gas cylinder. The method according to claim 1, Wherein when the cable is not pulled, the lower side of the release arm is supported by the gas opening / closing pin. The method according to claim 1, A pin pressing portion formed on the opposite side of the rotation center portion, the pin pressing portion integrally formed with a soft curved surface integrally with the release arm; Wherein a guide surface is formed on the inner circumferential surface of the arm guide portion so as to be curved so as to be guided by the pin pressing portion during operation of the release arm and guide the operation of the release arm. Action structure. The method according to claim 1, Wherein a valve is further provided on the lower side of the taper holder so as to support the gas opening and closing pin and to be inserted into a tapered portion on the upper side of the gas cylinder so that a vertical stroke of the gas cylinder is increased. Operation structure of cylinder. The method according to claim 1, The arm guide portion includes a lower arm guide portion inserted into an inner circumferential surface of a tapered portion of the upper side of the gas cylinder; Wherein an upper arm guide portion extending further to the upper side of the lower arm guide portion and having a cable insertion groove through which a cable passes is included. The method according to claim 1, And a cable holder fixed to an upper end of the taper holder for guiding the position and pulling of the cable. The method according to claim 1, Between the cable catching portion and the rotation center portion, And a vertical spacing portion extending upward from the rotation center portion for reliably performing an operation of the release arm when an external force is applied to the cable. The method according to claim 1, Between the cable catching portion and the rotation center portion, Characterized in that a part of the release arm is formed and includes a horizontal spacing part extending in a substantially horizontal direction so as not to interfere with the arm guide part during operation of the release arm . The method according to claim 1, The release arm is formed to have a constant thickness, Wherein the arm insertion hole has a constant width that is somewhat larger than the thickness of the release arm. The method according to claim 1, And a portion of the end portion of the rotation center portion contacting the arm stopping end forms a cusp.