KR100764470B1 - A gas cylinder - Google Patents

Abstract

The present invention relates to a gas cylinder, and in particular, by absorbing the shock generated during the up and down movement of the gas cylinder, it can give comfort to the user, and further, the gas to increase the height adjustment width of the gas cylinder It is about a cylinder.

Gas cylinder according to the present invention is a base tube; A spindle inserted into the base tube; A piston rod and a piston having one end inserted into the spindle and the other end fixed to the base tube; A bearing portion formed under the base tube; And a shock absorbing device formed inside the spindle and configured to include a spring having a predetermined elastic force to alleviate the impact force generated between the spindle and the base tube.

Gas cylinder according to the present invention may include a shock absorbing device in the lower portion of the spindle, it is possible to enhance the comfort of the user. In addition, the height adjustment width of the snow removal member is extended by the proposed gas cylinder, and the user can use it more conveniently.

Gas cylinder, shock absorber, shock absorbing member

Description

A gas cylinder

1 is a vertical cross-sectional view showing a conventional gas cylinder.

2 is an enlarged view illustrating a portion A of FIG. 1.

3 is a vertical sectional view showing a gas cylinder according to the present invention;

4 is an enlarged view illustrating a portion B of FIG. 3.

5 is a view showing a state in which the spindle is lowered to the lowest position in accordance with the present invention.

6 is an enlarged view illustrating a portion C of FIG. 5.

Figure 7 is a second embodiment showing the lower spindle shape of the gas cylinder according to the present invention.

8 is a third embodiment showing the lower spindle shape of the gas cylinder according to the present invention;

9 is a fourth embodiment showing the lower spindle shape of the gas cylinder according to the present invention;

10 is a fifth embodiment showing the lower spindle shape of the gas cylinder according to the present invention;

<Explanation of symbols for main parts of the drawings>

200: spindle 201: cylinder

202: piston 250: base tube

252: bearing 300: shock absorber

301: buffer member 302 washer

303: control ring 304: elastic member

The present invention relates to a gas cylinder.

In detail, the present invention relates to a gas cylinder that can provide comfort to the user by further absorbing the shock generated during the vertical movement of the gas cylinder, and further, the height adjustment width of the gas cylinder is expanded.

A general gas cylinder is used for an operation member such as a chair or a table, and is a device that allows the vertical operation of the operation member to be easily and conveniently operated.

1 is a vertical cross-sectional view showing a conventional gas cylinder.

Referring to FIG. 1, the gas cylinder 1 includes a spindle 2 connected to a seat plate of a chair, a base tube 3 into which the spindle 2 is inserted, and one end inside the spindle 2. A piston 4 and a piston rod 5 are inserted and the other end is fixed to the base tube 3 to allow the gas to communicate with each other up and down.

In addition, it is formed in the lower portion of the base tube (3), the fixed plate 6 is coupled to the end of the piston rod (5), is seated on the upper side of the fixed plate 6, the rotation of the spindle (2) A bearing 7 for supporting is included.

In addition, the spindle 2 is formed therein, and is formed by a cylinder 8 into which nitrogen gas or the like is injected at a predetermined pressure, and formed by the piston 4 and the cylinder 8, and includes nitrogen gas. A chamber 9 is included.

In the conventional gas cylinder configured as described above, as the nitrogen gas and the like enter and exit, the pressure of the gas inside the chamber 9 changes, so that the piston 4 moves inside the cylinder 8. The height of the is adjusted.

The conventional gas cylinder described above has been described in detail, such as the applicant Samhongsa, Republic of Korea Patent Application No. 2020010029424, 2020000017322, the description of the detailed structure and operation will be omitted.

FIG. 2 is an enlarged view illustrating portion A of FIG. 1.

Referring to FIG. 2, the spindle 2 includes a bent portion 11 having a lower end bent inward by a curling process and having a groove through which a piston passes. ) Includes a sealing assembly 10 seated on the upper side of the bent portion 11 and including a gas sealing member for maintaining the airtightness of the cylinder.

In addition, the upper end of the spindle (2) is formed to be inclined at a predetermined angle is formed with a tapered portion (12) that the inner diameter is narrowed toward the end. The taper holder 13 is inserted and fixed to the inner circumferential surface of the taper part 12 so that the shape of the taper part 12 is maintained. Then, the pipe holder 14 is mounted to the lower end of the tapered portion 12. In detail, the pipe holder 14 is mounted on the inner circumferential surface of the spindle 2, and is mounted on the lower end of the point where the taper portion 12 starts.

In particular, the conventional spindle 2 is such that the internal part 10 is fixed to a predetermined position in the spindle 2 by the bent portion 11, in general, the spindle 11 by the bent portion 11 Since the lower end of (2) is formed in a clogging structure, other parts cannot be inserted into the spindle (2). Therefore, the bearing 7 is in direct contact with the bent portion 11.

In the conventional gas cylinder, when the spindle descends to the lowest point, the lower part of the spindle and the bearing part collide with each other, and an impact force is generated, which causes inconvenience to the user due to the impact force generated at this time.

In addition, the conventional spindle is formed in a structure that can not be inserted into the bearing portion at the bottom, the spindle can not be moved in the space occupied by the bearing portion, the height adjustment width of the spindle is reduced. Therefore, in order to produce a longer stroke, the gas cylinder must be made larger, resulting in a higher cost burden.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a gas cylinder that can improve the user's comfort by forming a shock absorbing structure that can absorb the impact force on the lower part of the spindle.

It is also an object of the present invention to provide a gas cylinder in which the height adjustment width can be expanded while the overall size of the gas cylinder is the same.                         

In addition, it is an object of the present invention to provide a gas cylinder that can increase the service life of the product by preventing the parts from being in contact with each other to prevent damage to the parts by impact.

In order to achieve the above object, the gas cylinder according to the present invention is a base tube; A spindle inserted into the base tube; A piston rod and a piston having one end inserted into the spindle and the other end fixed to the base tube; A bearing portion formed under the base tube; And a shock absorbing device formed inside the spindle and configured to include a spring having a predetermined elastic force to alleviate the impact force generated between the spindle and the base tube.

By the above configuration, the gas cylinder according to the present invention includes a shock absorbing device in the lower portion of the spindle, it is possible to enhance the user's comfort.

In addition, the height adjustment width of the snow removal member is extended by the proposed gas cylinder, and the user can use it more conveniently.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of the inventive concept and other inventions can be easily added by adding, changing, or deleting other elements. I can suggest.

3 is a cross-sectional view of a gas cylinder according to the present invention.

Referring to FIG. 3, the gas cylinder 100 is fixed to the foot so that the base tube 250 is formed at the bottom of the support structure, and the base tube 250 is inserted into the base tube 250 to adjust the height of the snow-bearing member such as a chair. The spindle 200 is moved upward or downward.

In detail, the spindle 200 is formed therein, a cylinder 201 into which nitrogen gas or the like is injected at a predetermined pressure, and a piston 202 and a piston inserted into the cylinder 201 to define a compression space. The rod 211 is included. The first chamber 203 and the first chamber 203 formed by the piston 202 and the cylinder 201, which is a space containing nitrogen gas and the like, are formed when the height is adjusted. A gas entrance 204 through which nitrogen gas or the like passes through is included. A gas opening and closing pin 205 for opening and closing the gas entrance and exit 204 and a gas opening pin 206 for controlling the gas opening and closing pin 205 to allow the nitrogen gas and the like to pass therethrough are included. In addition, a pipe holder 207 for supporting the gas opening / closing pin 205 and the gas open pin 206 are inserted, and a taper holder 208 for keeping the upper portion of the spindle 200 in a tapered shape. ) Is included.

Here, a valve system consisting of the gas inlet 204, the gas opening and closing pin 205, the gas open pin 206, and the pipe holder 207 is mounted to the tapered portion of the spindle 200.

In addition, the spindle 200 is a gas inlet passage 209 which is a flow path through which nitrogen gas, etc. entering and exiting the gas inlet and outlet 204, and the nitrogen gas and the like that have passed through the gas inlet and outlet 209 are injected. The second chamber 210 is included. In addition, a shock absorbing device 300 is formed below the spindle 200 and includes a shock absorbing device 300 to prevent an impact when the spindle 200 moves to the lowest point to come into contact with the bearing part 252.

On the other hand, it is formed on the inner surface of the base tube 250, the tube guide 251 to guide the spindle 200 when the height is adjusted, and is formed in the lower portion of the base tube 250, the piston rod 211 Bearing portion 252 is fixed to the bottom of the ().

In more detail, the bearing part 252 includes a ball housing 253 including a bearing ball, and a bearing support 254 formed on the ball housing 253. In addition, a fixed plate 255 is mounted to the lower side of the ball housing 253, the end of the piston rod 211 is coupled. In addition, a washer 257 mounted on the lower portion of the fixing plate 255 and a lower portion of the washer 257 are formed, and a fixing means 256 for fixing one side of the piston rod 211 is included.

Hereinafter, looks at the operation of the gas cylinder according to the present invention configured as described above.

First, when a user presses the gas open pin 206 to adjust the height of a chair or the like, the gas opening / closing pin 205 is moved downward to open the gas entrance 204. Then, the nitrogen gas or the like injected into the first chamber 203 at a predetermined pressure enters and exits through the opened gas outlet 204. In addition, the nitrogen gas, etc., which enter and exit through the gas entrance and exit 204 pass through the gas entrance and exit passage 209 and enter and exit the second chamber 210.

At this time, a difference occurs in the pressure in the first chamber 203 and the second chamber 210, and the piston 202 to move inside the cylinder 201 by the pressure difference. do. As the piston 202 is moved, the spindle 200 moves in the base tube 250 along the inner surface of the tube guide 251. And, by the movement of the spindle 200, the height adjustment function of the gas cylinder 100 is performed.

That is, in the case of lowering the height of the skin tongue on which the gas cylinder 100 is mounted, the sum of the weight of the user and the weight of the skin tongue is greater than the gas pressure inside the cylinder 201, so that the skin tongue, such as the chair Will descend. On the other hand, when the height is increased, the user presses the gas open pin 206 while not sitting on the skin tongue, so that the gas pressure inside the cylinder 201 is greater than the weight of the skin tongue, so that the skin tongue Will rise.

On the other hand, when the spindle 200 is moved to reach the lowest point, it may collide with the bearing part 252 to generate an impact force, the impact force may be absorbed by the shock absorbing device 300, It demonstrates below.

4 is an enlarged view illustrating a portion B of FIG. 3.

Referring to FIG. 4, the spindle 200 according to the present invention includes a piston rod 211 mounted therein and a cylinder 201 mounted therein, into which nitrogen gas or the like is injected at a predetermined pressure. do. In addition, an open holder 212 is formed below the cylinder 201 to support the flow of gas and the cylinder 201. And, at least one or more is mounted to the lower side of the open holder 212, a gas chamber 213 for preventing the nitrogen gas, etc. in the cylinder 201 is included. A flange 214 formed below the gas chamber 213 and at least one washer 215 formed below the flange 214 are included. The washer 215 may be formed to contact the lower portion of the spindle 200, and at least one groove 216 may be formed on an outer circumferential surface of the spindle 200 that is in contact with the washer 215. In addition, the groove 216 is for preventing the internal parts mounted inside the spindle 200 from being supported and removed from the lower side, and are formed by an embossing method. The shock absorber 300 is formed below the washer 215 and is configured to cushion the shock generated when the spindle 200 collides with the bearing part. In addition, the lower end of the shock absorbing device 300 includes a spindle lower end 217 is formed to extend to a predetermined length.

Here, it is noted that the washer 215 may be replaced with another component made of a metal material.

In addition, the embossing method refers to a stamping process to be recessed with a predetermined depth and outer diameter by applying pressure to the outer circumferential surface of the spindle 200 using a launcher.

On the other hand, the spindle 200 is in contact with when descending to the lowest point, there is a bearing portion 252 is fixed to one side of the piston rod 211.

In detail, the shock absorbing device 300 is mounted in contact with the lower side of the washer 215, the shock absorbing member 301 for absorbing the impact force due to the collision with the bearing portion 252 and the shock absorbing member 301 At least one washer 302 for supporting is included.

Here, the buffer member 301 is mounted in a shape in which a portion of the buffer member 302 is placed on the top. By such a shape, since the shock absorbing member 301 and the washer 302 are manufactured separately, the shock absorbing member 301 may be seated on the top of the washer 302, so that assembly may be facilitated.

In addition, at least one or more are mounted on the inner surface of the spindle 200 under the washer 302, and a control ring 303 is included to prevent the washer 302 from escaping out of the spindle 200.

Here, the control ring 303 can be easily replaced with another shape bent to a predetermined diameter in a range that can achieve the purpose of preventing the washer 302 is separated from the outside of the spindle 200. To reveal.

The washer is mounted between the washer 302 and the washer 215 mounted to be in contact with the groove 216, and the downward force is always applied to the washer 302. A circular elastic member 304 capable of absorbing the impact force is included.

 Hereinafter, the operation of the shock absorbing device according to the present invention configured as described above will be described with reference to FIGS. 5 and 6.

5 is a view showing a state in which the spindle is lowered to the lowest position according to the invention, Figure 6 is an enlarged view showing a portion C of FIG.

5 and 6 have the same configuration and shape as those described above with reference to FIGS. 3 and 4, and only the characteristic points will be described below with reference to the operation of the shock absorbing device.

First, when the spindle 200 descends to reach the lowest point, the spindle 200 collides with the bearing part 252. At this time, the bearing portion 252 has an upper portion collides with the washer 302, the impact force is generated. In addition, since the bearing part 252 is fixed to the lower portion of the base tube, the impact force is transmitted upward to the impacted washer 302. The washer 302 is conveyed upward by the transmitted impact force, and the buffer member 301 supported by the washer 302 is also conveyed upward.

Here, in the transfer, the washer 302 has an outer circumferential surface is guided by the inner circumferential surface of the lower portion of the spindle 200.

In addition, when the transfer is performed, the elastic member 304 is compressed. In addition, the buffer member 301 to be transported collides with the washer 215 and / or the flange 214 mounted on the groove 216. Since the flange 214 and the washer 215 are fixed inside the spindle 200, the transfer of the shock absorbing member 301 is stopped at the same time as the collision. In addition, elastic deformation of the shock absorbing member 301 itself occurs, and the impact force is absorbed by the shock absorbing member 301. When the spindle 200 rises again, the bearing part 252 is separated from the lower portion of the spindle 200. When the bearing part 252 is separated, the elastic member 304 which has been compressed is restored to its original shape by elasticity. In addition, the washer 302 is lowered by the restoring and comes into contact with the control ring 303 again.

By the above operation, the shock absorbing function of the shock absorbing device 300 is performed, it can give comfort to the user by the function.

In addition, when the spindle 200 is lowered to the lowest, a part of the bearing portion 252 is inserted into the spindle 200, the movement of the spindle 200 for height adjustment can be made stable. And, the height adjustment range can be increased.

On the other hand, the buffer member 301 is preferably formed of a rubber material having a predetermined elastic force, the present invention is not limited to this, various materials that can be absorbed by the impact force generated by collision with the bearing portion 252 Note that this can be used.

In addition, a spring is preferably used as the elastic member 304. In addition, in order to increase the buffering force, the wire diameter of the spring may be increased, and the thickness of the buffer member 301 may be increased.

In addition, it is noted that the control ring 304 can be replaced with a predetermined structure to prevent the washer 302 from being separated.

In addition, the groove 216 is recessed inwardly of the spindle 200 so that the open holder 212, the gas seal 213, the flange 214, and other internal parts may be fixed to the upper side. It has become a shape.

Here, the groove 216 is preferably formed along the outer circumferential surface of the spindle 200. In addition, the outer peripheral surface is preferably formed at regular intervals. And, the ideal number of the grooves 216 may be presented as six, but it should be noted that the present invention is not limited thereto. In addition, although the shape of the groove 216 is preferably a circular groove shape for ease of processing and the like, it is apparent that various shapes capable of fixing the internal parts can be proposed.

7 to 10 is another embodiment showing the spindle lower shape of the gas cylinder according to the present invention.

7 to 10, since the spindle 200 includes the same components as those of the first embodiment shown in FIGS. 3 to 6, only the features of the present embodiment will be described below.

7 is a second embodiment showing the lower spindle shape of the gas cylinder according to the present invention, in which the washer 302 is fitted to a recess formed in the lower edge of the buffer member 301.

By the shape as described above, since the buffer member 301 and the washer 302 may be integrally formed, the function of the washer 302 supporting the buffer member 301 may be enhanced.

Here, the washer 302 is preferably fixed to the buffer member 301 and is injected together.

8 is a third embodiment showing the lower spindle shape of the gas cylinder according to the present invention, in which the elastic member 304 has a tapered shape.

That is, the inner diameter of the elastic member 304 becomes smaller toward the upper end, and when the elastic member 304 is compressed by applying such a shape, the length in the state in which the elastic member 304 is compressed to the maximum is the inner diameter. This becomes shorter than the same case. Therefore, there is an effect that the stroke of the spindle 100 is further increased by that.

On the other hand, Figure 9 is a fourth embodiment showing the lower spindle shape of the gas cylinder according to the present invention. In the present embodiment, the shock absorbing member 301 is formed at a position spaced apart from the bottom by a predetermined height to form a groove into which the washer 302 is fitted.

By such a shape, the area where the shock absorbing member 301 directly collides with the bearing is widened, so that the impact force can be more easily absorbed.

In addition, since the washer 302 does not directly collide with the bearing, it is possible to prevent the washer 302 from being deformed or damaged due to the collision.

Here, the washer 302 is preferably injected with the buffer member 301.

On the other hand, Figure 10 is a fifth embodiment showing the spindle lower shape of the gas cylinder according to the present invention. In the present embodiment, there is no buffer member, and the elastic member 304 performs a buffer action. In other words, the elastic member 304 not only functions the downward force to always act on the washer 302 but also simultaneously performs a buffering action.

By the shape as described above, since the impact force can be absorbed only by the elastic member 304, as the number of parts is reduced, not only the manufacturing cost can be reduced, but also the work efficiency can be increased by the reduction in the number of manufacturing processes.

By the above configuration, since the gas cylinder according to the present invention includes a shock absorbing device in the lower part of the spindle to absorb the impact force due to the collision with the bearing portion, there is an effect that can give comfort to the user.

In addition, when the spindle is moved downwards as much as possible, since a part of the bearing portion is inserted into the lower part of the spindle, the height adjustment width is extended, so that the user can conveniently use it.

In addition, by mitigating the impact generated between a plurality of components constituting the internal configuration of the gas cylinder, there is an effect that can further increase the service life of the product.

Claims (17)

Base tube; A spindle inserted into the base tube; A piston rod and a piston having one end inserted into the spindle and the other end fixed to the base tube; A bearing portion formed under the base tube; And And a shock absorbing device formed inside the spindle, the shock absorbing device including a spring having a predetermined elastic force in order to alleviate the impact force generated between the spindle and the base tube. Claim 2 was abandoned when the setup registration fee was paid. The method of claim 1, The gas shock absorber further comprises a rubber cushion member. delete Claim 4 was abandoned when the registration fee was paid. The method of claim 1, The shock absorbing device is a gas cylinder further comprises at least one separation prevention member of a shape curved to a predetermined diameter. delete delete Claim 7 was abandoned upon payment of a set-up fee. The method of claim 1, The shock absorbing device, the gas cylinder further comprises a washer, characterized in that the outer peripheral surface is guided by the inner peripheral surface of the lower spindle can move. delete delete Claim 10 was abandoned upon payment of a setup registration fee. The method of claim 1, And at least one groove formed on the outer circumferential surface of the lower part of the spindle to fix the internal component. delete Claim 12 was abandoned upon payment of a registration fee. The method of claim 1, The shock absorber includes a washer, The gas cylinder further comprises a buffer member is formed on the outer peripheral surface of the lower corner recessed portion for fitting the washer. Claim 13 was abandoned upon payment of a registration fee. The method of claim 1, The shock absorber includes a washer, The gas cylinder further comprises a buffer member that is mounted to a portion of the bottom surface of the washer. delete Claim 15 was abandoned upon payment of a registration fee. The method of claim 1, The spindle includes a departure prevention member, Gas cylinder, characterized in that the lower end of the spindle extending to a predetermined length formed below the escape preventing member. Claim 16 was abandoned upon payment of a setup registration fee. The method of claim 1, The spring has the same inner diameter or a gas cylinder characterized in that the spirally wound in a tapered shape of the inner diameter increases toward the lower end. delete

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