KR20120102234A - A gas cylinder with a cushion - Google Patents

Abstract

PURPOSE: A gas cylinder for preventing the leakage of grease is provided to maintain the clean state of the outside of a sliding member ascending and descending a seating plate. CONSTITUTION: A gas cylinder for preventing the leakage of grease includes an outer container body(10), a bushing member(20), a sliding member(30), a piston, a rod, a valve body, and a lever. One end of the outer container body is vertically fixed to the upper side of a frame having wheels. The bushing member is combined to the upper inside wall of the outer container body, and includes a central guide. The sliding member is slide-combined to the bushing member to move toward the upper and lower directions, and to rotate to the left and right directions. An inner pipe with a gas guiding path is separately connected to the sliding member. The valve body is seal-combined to the upper side of the sliding member. The piston is vertically combined to the upper side of the rod on the bottom center. The lower side of the rod is rotatably fixed to the bottom of the outer container body. The valve body controls the gas movement through the gas guiding path. The lever operates a valve pin of the valve body.

Description

A gas cylinder with a cushion

The present invention relates to a gas cylinder, and more particularly, to a gas cylinder for preventing grease leakage from leaking liquid lubricating oil such as grease to a slide member for lifting and lowering a seat plate when applied to a chair or the like that is capable of height adjustment and rotation. .

In general, the gas cylinder is applied to the height adjustment structure of the seat plate portion where the user sits in a chair or the like to serve to raise and lower the seat plate portion through gas pressure according to the user's selection.

Conventionally, the gas cylinder is also referred to as a gas spring, a hollow outer cylinder 10 installed perpendicular to the base provided on the ground by the illustration of Figure 1, and a bushing member coupled to the inner upper side of the outer cylinder 10 ( 20 and a slide member 30 which is slidably inserted in the bushing member 20 in an up and down direction, and forms a gas flow path therebetween and is formed of inner and outer pipes 32 and 34, and the inner side. A piston 40 is slidably positioned in the pipe 32 to raise and lower the slide member 30 according to the gas pressure, and an upper end thereof is fixed to the center of the bottom surface of the piston 40, and a lower end thereof is the outer cylinder. The slide member 30 is coupled to the upper side of the slide member 30 and the slide member 30 fixed to the bottom surface of the 10, and the slide member 30 moves up and down according to the operation of the valve pin for controlling the movement direction of the gas. Control It consists of a body 60 and a lever 70 for operating the valve pin.

The gas cylinder is operated by the movement of the gas, the valve body 60 in accordance with the operation of the valve pin formed in the valve body 60 gas located in the upper and lower space around the piston (40). The slide member 30 is moved up and down while moving through the gas flow path between the inner pipe and the outer pipe.

The gas cylinder having the above-described structure is mainly applied to a chair as is known in the art, and the slide member 30 is lifted up and down by the support of the rod 50 during operation through the operation lever 70 of the seated person, thereby lifting the seat plate part. Descended.

However, in the case of the gas cylinder, when the seat plate portion of the chair is raised, the slide member 30 slides on the inner wall of the bushing member 20 and the outside surface is exposed to the outside. At this time, grease is applied to the inside for smooth slide. There is a problem that the liquid lubricating oil such as a) bury on the surface of the slide member (30).

Moreover, the liquid lubricant such as grease is applied to the slide member from the outside for the continuous slide of the slide member, so that when the external object or the hand comes in contact with the liquid lubricant, the liquid lubricant may not be beautiful in appearance. There was a problem.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

SUMMARY OF THE INVENTION

First: the appearance of the slide member for raising and lowering the seat plate in the chair and the like to always maintain the clean.

second; The upper end of the bushing member for elevating the slide member is to be able to achieve a beautiful appearance without being exposed to the outside.

third; The foreign matter of the slide member which raises and lowers the seat plate part is prevented from flowing into the inside of the bushing member so that the gas cylinder can be used for a long time.

The present invention to achieve the above object,

An outer cylinder, a bushing member coupled to an inner upper side of the outer cylinder, a slide member slidably inserted in an up and down direction inside the bushing member, and a slide member consisting of inner and outer pipes, and slideable inside the inner pipe; A piston which is positioned so as to raise and lower the slide member according to gas pressure, an upper end of which is fixed to a center of a bottom of the piston, and a lower end of which is fixed to a bottom of the outer cylinder, and coupled to an upper side of the slide member, In the gas cylinder consisting of a valve body for controlling the slide member to be operated up and down according to the operation of the valve pin for controlling the movement direction of the gas, and a lever for operating the valve pin, the slide member is in contact with the slide On the inner circumferential surface of at least one of the upper and lower inner circumferential surfaces of the bushing member, An open groove is formed in the inner center direction, and packing is coupled to the groove.

As another example, a cover is coupled to the upper end of the bushing member to cover the bushing member, a guide groove is formed along the circumference of the inner circumferential surface of the cover, and the packing is in contact with the outer surface of the slide member. can do. In this case, the packing does not need to be installed inside the bushing member unless special airtightness is required.

In addition, the cover may be coupled in a form surrounding the upper end of the outer cylinder or coupled to the bushing member as a fastener.

In addition, a guide hole is formed inside the bushing member to guide the slide member, and an extended end extending outwardly is formed at an upper end to be caught by an upper end of the bushing member, and a fastener formed on the cover is extended. It is possible to further include a sleeve to be coupled to the bushing member through a stage.

Here, the packing may be rubber, synthetic resin, sponge, etc., and may also be applied to a cross section having a circular, square, polygonal, and a cutting groove in an upward or downward direction to enable contraction and expansion.

The present invention, the outer surface of the slide member for raising and lowering the seat plate part while being drawn out from the bushing member of the outer cylinder when applied to the chair, etc., the effect that can be secured aesthetics and cleanliness by not exposed the chemical liquid such as grease by the packing have.

In addition, as the upper end of the bushing member is covered in a state protected by a cover having a packing, there is an effect of ensuring the beauty of the appearance as well as the cleanliness of the slide member.

In addition, there is an effect to simplify the installation and disassembly through the cover.

In addition, the foreign matter does not flow into the bushing member through the packing there is an effect that can use the gas cylinder for a long time.

1 is a longitudinal cross-sectional view of a conventional gas cylinder,
2 is a longitudinal sectional view of a gas cylinder according to the present invention;
3 is an enlarged longitudinal sectional view of the main part of FIG. 2;
Figure 4 is a longitudinal sectional view showing another form of the packing in Figure 3,
5 is a longitudinal sectional view of another embodiment according to the present invention;
6 is another embodiment of FIG. 5;
7 is another embodiment of FIG. 5 or 6.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in describing the present invention, if it is determined that related related arts may blur the gist of the present invention, the detailed description thereof will be omitted. do.

The present invention relates to a gas cylinder which prevents foreign matter from flowing into the inside of the bushing member while preventing liquid lubricant such as grease from smearing on the outer surface of the slide member used to adjust the height of the seat plate in a chair or the like.

≪ Embodiment 1 >

2 to 4, the outer cylinder 10, the bushing member 20 coupled to the inner upper side of the outer cylinder 10, and the up and down direction inside the bushing member 20 are illustrated. A slide member 30 which is slidably inserted into the slide member 30, and a piston 40 which is slidably positioned in the inner pipe and moves the slide member 30 up and down in accordance with gas pressure. The upper end is fixed to the center of the bottom surface of the piston 40, the lower end is coupled to the rod 50 and the upper side of the slide member 30 fixed to the bottom surface of the outer cylinder 10, the direction of gas movement According to the operation of the valve pin for controlling the valve body 60 to control the slide member 30 to be operated up and down, provided to the inside of the lever 70 and the bushing member 20 for operating the valve pin. To smoothly slide the slide member 30 It is configured to include a guide guiding packing 320.

The outer cylinder 10, the bushing member 20, the slide member 30, the piston 40, the rod 50, the valve body 60 and the lever 70 has the same function as known.

The outer cylinder 10 is formed in a cylindrical shape and one end is fixed to the upper surface of the frame having a wheel located on the frame or ground located on the ground. The bushing member 20 is coupled to the inner upper end of the outer cylinder 10, and the slide member 30 is coupled to the inner side of the bushing member 20 so as to be lifted or lowered.

The bushing member 20 is coupled to the upper inner wall of the outer cylinder 10, the center guide is formed.

The slide member 30 is composed of inner and outer pipes 32 and 34 having a gas guide flow passage 36 in the middle thereof, and the outer pipe 34 is coupled to an inner upper side of the outer cylinder 10. The slide member is slidably coupled to the bushing member 20 so as to be movable up and down and left and right, and the inner pipe 32 has a gas guide flow passage 36 therein and is spaced apart and the valve body 60 is hermetically sealed at the upper end thereof. Combined into a state. The piston 40 and the rod 50 are inserted into the inner pipe 32. The gas guide passage 36 guides the gas to the upper side and the lower side of the inner pipe 32.

Here, the bushing member 20, the O-ring-shaped packing 320 is coupled to the position where the slide member 30 is in contact with the slide, that is, the upper inner peripheral surface or the lower inner peripheral surface, the packing 320 is the bushing member ( It is preferable to be fitted into the groove 310 formed at least one or more in the upper and lower positions of the inner peripheral surface of 20).

The packing 320 is a core technical element of the present invention to prevent leakage of liquid lubricant such as grease applied for smooth operation of the slide member 30 to the outside when the slide member 30 is exposed. Rubber, synthetic resin, sponge, etc. may be applied, and the cross section may be variously implemented in a circle, a square, a polygon, or the like.

In addition, the packing 320 may be applied to have a cutting groove 322 in the upward or downward direction to enable the contraction.

The valve body 60 is provided in an airtight state above the slide member 30 and the inner pipe to open and close the gas flow path while the valve pin is moved up and down to move the gas through the gas guide flow path 36. Control.

The piston 40 is slide-coupled in an airtight state in the inner pipe 32, the upper end of the rod 50 is vertically coupled to the bottom center, the lower end of the rod 50 is the outer cylinder It is rotatably fixed to the bottom of the (10).

The lever 70 is provided on the bottom surface of the chair seat plate portion to operate the valve pin of the valve body 60 during operation.

As described above, the gas cylinder has a lower side centering on the piston 40 when the seated person operates the lever 70 to position the valve pin in a state in which the gas flow path is opened while the gas cylinder is applied to the bottom surface of the seat plate of the chair. The gas in the space is moved through the gas guide flow path 36 between the inner and outer pipes 32 and 34, and the gas is moved to the upper space of the piston 40 and fixed to the seat plate through the gas pressure. The slide member 30 is raised. At this time, when the gas flow is closed by operating the valve pin, the slide member 30 is fixed to maintain the seat plate in a fixed state. In this process, the slide member 30 repeatedly moves up and down with respect to the bushing member 20. The packing 320 does not leak the liquid lubricant filled in the bushing member 20 to the outside. Of course, the foreign matter on the outer surface of the slide member 30 is prevented from flowing into the inside of the bushing member 20 to maintain cleanliness with the smooth movement of the slide member (30).

≪ Embodiment 2 >

5 to 7, the outer cylinder 10, a bushing member 20 coupled to an inner upper side of the outer cylinder 10, and an up and down direction inside the bushing member 20. A slide member 30 which is slidably inserted into the slide member 30, and a piston 40 which is slidably positioned in the inner pipe and moves the slide member 30 up and down in accordance with gas pressure. The upper end is fixed to the center of the bottom surface of the piston 40, the lower end is coupled to the rod 50 and the upper side of the slide member 30 fixed to the bottom surface of the outer cylinder 10, the direction of gas movement In accordance with the operation of the valve pin for controlling the valve body 60 to control the slide member 30 to be operated up and down, coupled to the upper end of the lever 70 and the bushing member 20 for operating the valve pin. Kerr to cover the bushing member 20 It is configured to include a packing 320 provided in the inner circumference of 220, the cover 220.

Here, the outer cylinder 10, the bushing member 20, the slide member 30, the piston 40, the rod 50, the valve body 60 and the lever 70 is the same function as the known and the first embodiment The description will be omitted by way of example.

The cover 220 is coupled to the upper end of the bushing member 20, the guide groove 230 is formed along the periphery of the inner circumferential surface of the cover 220, the packing 320 in the guide groove 230 Is combined. (See Fig. 5)

Here, the cover 220, the insertion groove 222 is formed on the bottom may be applied to be coupled in a form surrounding the upper end of the outer cylinder (10). In addition, the cover 220 may be fixedly coupled to the bushing member 20 by a separate fastener (see FIGS. 5 and 6).

In addition, a cylindrical sleeve 260 having a guide hole formed therein is coupled to the inside of the bushing member 20 to guide the slide member 30. (See Figure 7)

The sleeve 260 is made of a metal or synthetic resin material, the expansion end 262 is extended to the outer side to be caught on the upper end of the bushing member 20 is formed on the upper end, fastening formed in the cover 220 The sphere 224 is coupled to and fixed to the upper side of the bushing member 20 through the expansion end 262.

The protrusion 225 is formed at an end of the fastener 224, and the protrusion 225 is locked by passing through a hole formed in the extension end 262. At this time, the tip of the protrusion 225 is fixed in the form of being inserted into the upper side of the bushing member (20). The hole of the expansion end 262 forms an inclination angle of which the lower inner diameter is reduced than the upper inner diameter so that the protrusion 225 is guided.

The cover 220, the sleeve 260, and the bushing member 20 are fixed by fitting the sleeve 260 to the inside of the bushing member 20 during assembly. Then, the upper end 262 of the sleeve 260 is in close contact with the upper side of the upper end of the bushing member 20. At this time, the packing 320 is placed on the top of the extension end 262, and then the cover 220 is closed. ). Then, the front projection 225 of the fastener 224 is inserted into the groove formed in the upper upper surface of the bushing member 20 while passing through the hole formed in the expansion end 262, the upper jaw of the projection 225 The addition is held by the expansion end 262 to maintain a stable fixed state.

10: outer cylinder
20: bushing member
30: slide member
40: piston
50: loading
60: valve body
70: lever
220: cover 230: guide groove
320: packing

Claims (7)

The outer cylinder 10, the bushing member 20 coupled to the inner upper side of the outer cylinder 10, and is slidably inserted in the vertical direction inside the bushing member 20, and consists of inner and outer pipes A slide member 30, a piston 40 slidably positioned inside the inner pipe to raise and lower the slide member 30 according to gas pressure, and an upper end fixed to the bottom center of the piston 40 The lower end is coupled to the rod 50 is fixed to the bottom surface of the outer cylinder 10, and the upper side of the slide member 30, the slide member in accordance with the operation of the valve pin for controlling the movement direction of the gas ( In the gas cylinder composed of a valve body (60) for controlling 30 to be operated up and down, and a lever (70) for operating the valve pin,
In at least one of the inner circumferential surface of the upper or lower inner circumferential surface of the bushing member 20 to which the slide member 30 is in contact with the slide, a groove 310 is opened in the inner center direction along the circumference, and the groove 310 Grease leakage preventing gas cylinder, characterized in that the packing 320 is coupled to.
The outer cylinder 10, the bushing member 20 coupled to the inner upper side of the outer cylinder 10, and is slidably inserted in the vertical direction inside the bushing member 20, and consists of inner and outer pipes A slide member 30, a piston 40 slidably positioned inside the inner pipe to raise and lower the slide member 30 according to gas pressure, and an upper end fixed to the bottom center of the piston 40 The lower end is coupled to the rod 50 is fixed to the bottom surface of the outer cylinder 10, and the upper side of the slide member 30, the slide member in accordance with the operation of the valve pin for controlling the movement direction of the gas ( In the gas cylinder composed of a valve body (60) for controlling 30 to be operated up and down, and a lever (70) for operating the valve pin,
A cover 220 is coupled to the upper end of the bushing member 20 to cover the bushing member 20, and a guide groove 230 is formed along an circumference of an inner circumferential surface of the cover 220, and the guide groove ( A grease leakage preventing gas cylinder, characterized in that the packing 320 is in contact with the outer surface of the slide member 30 to the 230.
The method according to claim 2,
Grease leakage preventing gas cylinder, characterized in that the cover 220 is coupled to the form surrounding the upper end of the outer cylinder (10) or fastening to the bushing member (20).
The method according to claim 3,
Inside the bushing member 20, a guide hole is formed to guide the slide member 30, and an extension end 262 extended outward is formed at an upper end thereof so as to be caught by an upper end of the bushing member 20. And a sleeve (260) configured to couple the fastener (224) formed on the cover (220) to the bushing member (20) through the expansion end (262).
The method according to claim 2,
The packing is
Grease leakage preventing gas cylinder, characterized in that made of any one of rubber, synthetic resin, sponge.
The method according to claim 5,
The packing is
Grease leakage gas cylinder, characterized in that the cross section consisting of any one of a circle, a square, a polygon.
The method of claim 6,
The packing is
Grease leakage preventing gas cylinder, characterized in that it has a cutting groove in the upward or downward direction to enable the contraction.

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