KR20110092114A - Gas cylinder - Google Patents

Abstract

PURPOSE: A gas cylinder is provided to minimize the impact force delivered to the member in which cylinder is installed by proceeding a cushion action in the entire stroke. CONSTITUTION: A gas cylinder comprises an external barrel(10), a spindle guider(12), a spindle(11), a piston rod(13), an elastic member(15), and a tube guider(16). The spindle guider is coupled with the top of the external barrel. The spindle passes through the spindle guider and is moved up and down. The piston rod is connected to the spindle. A tube is connected to the piston rod and is moved up and down with the piston rod. The elastic member supports the tube. The tube guider supports the elastic member and guides the up and down motion of tube.

Description

Gas cylinder

The present invention relates to a gas cylinder for shock absorption.

In general, a cylinder is a mechanism that is formed between a seat plate of a chair and a chair base, for example, to adjust the height of the seat plate. As a kind of cylinder, a gas cylinder raises and lowers a seat plate part by adjustment of a gas pressure.

In such a gas cylinder, the spindle moves up and down as a result of the support of the piston rod when the seat lever is operated by the seated person.

When the spindle stops after the lowering operation, that is, when the load of the seated person is generated, gas pressure is applied inside the spindle by the bearing force of the piston rod, and the cushioning force is provided through the gas pressure to relieve the burden on the seated person to some extent. do.

However, the above-described gas cushion does not absorb the impact force, a structure has been proposed to absorb the load of the piston rod by providing a damper at the end of the piston rod.

In the case of the gas cylinder to which the damper is applied as described above, if the seated person sits in a state where the seat plate of the chair is operated to the lowest position, the damper compresses the minimum impact force by the compression of the damper, but the compression section of the damper is short so that the impact repulsive force is transmitted to the seated person. In this case, there is a problem in that the seated person receives the burden for this and complains of pain.

As a conventional technology for improving this problem, Korean Patent Application No. 10-2008-0008973, the name "shock absorbing gas cylinder" can be exemplified.

However, in the prior art, when the spring is restored while the sleeve moves downward with the piston rod, there is a problem that noise is generated while the support piece of the sleeve collides with the lower end of the bushing member.

In addition, when the number of collisions between the support piece of the sleeve and the bushing member is increased, deformation of the support piece occurs and thus it is not possible to smoothly perform the spring support area, so that the entire cylinder needs to be replaced.

In addition, there is a complicated structure as a sleeve guider, which is a separate article, is provided between the spacer supporting the bottom of the spring and the sleeve.

An object of the present invention is to provide a gas cylinder to perform a cushioning action in the entire stroke, so that the impact force transmitted to the member in which the cylinder is installed is minimized.

Another object of the present invention is to provide a gas cylinder to minimize the noise generated during the operation.

Still another object of the present invention is to provide a gas cylinder in which the assembling process is simplified.

Still another object of the present invention is to provide a gas cylinder in which impact force absorption is maximized by a simple structure.

Gas cylinder according to one aspect, the outer cylinder; A spindle guider coupled to an upper portion of the outer cylinder; A spindle penetrating the spindle guider and vertically moving; A piston rod connected to the spindle; A tube provided inside the outer cylinder and connected to the piston rod to move up and down together with the piston rod; An elastic member for supporting the tube; A tube guider for supporting the elastic member and guiding vertical movement of the tube; And a noise preventing member disposed between the spindle guider and the tube to prevent impact noise of the tube and the spindle guide.

According to another aspect, a gas cylinder includes: an outer cylinder; A spindle guider coupled to an upper portion of the outer cylinder; A spindle penetrating the spindle guider and vertically moving; A piston rod connected to the spindle; A tube provided inside the outer cylinder and connected to the piston rod to move up and down together with the piston rod; An elastic member for supporting the tube; And a tube guider for supporting the elastic member and guiding the up and down movement of the tube, wherein the tube guider is seated on a portion of the outer cylinder and supported by the outer cylinder.

According to the proposed embodiments, since the cushion by the gas provided in the cylinder and the cushion by the elastic member are made at the same time, there is an advantage that the impact force is transmitted to the seated person is minimized.

In addition, when the tube moved downward with the piston rod by the noise preventing member is moved upward by the restoring force of the elastic member, the tube and the spindle guider do not directly collide, so noise can be prevented.

In addition, as the tube comes into contact with the noise preventing member, the noise preventing member absorbs the impact force, thereby reducing noise and preventing the extension portion of the tube from being damaged or deformed.

In addition, in the case where the supporter is formed in the outer cylinder by embossing, it is only necessary to mount a washer for supporting the tube guider on the supporter, so there is an advantage in that the work process is simplified.

In addition, when mounting the tube guider to the bent portion (supporting portion) of the outer cylinder, there is an advantage that a separate supporting means for supporting the tube guider is unnecessary.

1 is a cross-sectional view of a cylinder according to the first embodiment.
2 is a cross-sectional view showing a state in which the cylinder of FIG. 1 operates.
3 is an enlarged view of a portion A of FIG. 1 according to the second embodiment;
4 is an enlarged view of a portion A of FIG. 1 according to a third embodiment.
5 is a sectional view of a cylinder according to a fourth embodiment.
6 is a sectional view of a cylinder according to a fifth embodiment.
7 is a sectional view of a cylinder according to a sixth embodiment;
8 is a sectional view of a cylinder according to a seventh embodiment.
9 is a sectional view of a cylinder according to an eighth embodiment;
10 is a sectional view of a cylinder according to a ninth embodiment.
11 is a sectional view of a cylinder according to a tenth embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The spirit of the present invention is not limited to the embodiments presented, and other embodiments included in the scope of the present invention and other regressive inventions may be easily proposed by adding, changing, or deleting other elements. Can be. In addition, the spirit of the present invention is not limited to the specific embodiment itself, it is to be noted that additional examples according to some combination of components in each embodiment is included in the scope of the present invention.

1 is a cross-sectional view of a cylinder according to a first embodiment, Figure 2 is a cross-sectional view showing a state in which the cylinder of Figure 1 operates.

1 and 2, the cylinder 1 according to the present embodiment includes an outer cylinder 10 having an empty inside, a spindle 11 relative to the outer cylinder 10, and the outer cylinder 10. A spindle guider 12 coupled to an upper side of the spindle guide to guide the up and down movement of the spindle 11, a piston rod 13 inserted into the spindle 11 to move relative to the spindle 11, and A tube 14 connected to the piston rod 13 to move together with the piston rod 13, an elastic member 15 compressed or extended according to the movement of the tube 14, and the elastic member 15. And a tube guider 16 for supporting the movement of the tube 14 and a washer 17 for supporting the tube guider 16.

In detail, the outer cylinder 10 may be formed in a cylindrical shape with a constant diameter or a non-uniform diameter as a whole. That is, the upper portion of the outer cylinder 10 may be formed in a cylinder having a constant diameter, the lower portion may be formed in a truncated truncated cone shape. In contrast, the outer cylinder 10 may be formed such that a portion of the entire length is reduced in diameter. In this embodiment, as an example, the outer shape will be described in that the cylindrical shape is not constant.

The outer cylinder 10 is bent to connect the upper pipe 112, the lower pipe 114 having a diameter smaller than the diameter of the upper pipe 112, and the upper pipe 112 and the lower pipe 114. The unit 113 is included.

The upper pipe 112 may be formed to have a constant diameter or decrease in diameter toward the lower side. The lower pipe 114 may have a constant diameter or may be formed to decrease in diameter toward the lower side. The bent portion 113 functions to rapidly vary the diameter of the lower end of the upper pipe 112 and the diameter of the upper end of the lower pipe 114.

The spindle guider 12 is a body 121 inserted into the outer cylinder 10 from the upper side of the outer cylinder 10, and protrudes laterally from the body 121, the body 121 is the outer cylinder ( And a seating portion 122 seated on an upper end of the outer cylinder 10 in the inserted state. One or more pins P may be fastened to the outer cylinder 10 and the spindle guider 12 on the outside of the outer cylinder 10 so that relative movement of the spindle guider 12 and the outer cylinder 10 is prevented. have.

The outer diameter of the spindle 11 may be formed to be substantially the same as the inner diameter of the spindle guider 12. A cylinder tube 22 and a valve unit 20 are provided inside the spindle 11, and the valve unit 20 is operated by the opening / closing member 21.

The valve unit 20 regulates the flow of gas filled in the cylinder tube 22. In the present embodiment, the gas flow inside the cylinder tube 22, the operation of the valve body, and the operation of the opening / closing member are the same as those described in Patent Registration 10-0576756, and thus detailed description thereof will be omitted.

On the other hand, the tube 14 is provided inside the outer cylinder (10). The tube 14 may be formed in a cylindrical shape with an open upper surface and an empty inside. In addition, the tube 14 includes a body 141 and an extension part 142 extending in a horizontal direction from the upper end of the body 141 to the outside.

The piston rod 13 is fixed to the body 141 while penetrating the lower surface of the body 141. The inner diameter of the body 141 is larger than the outer diameter of the piston rod 13, so that the inner circumferential surface of the body 141 and the piston rod 13 are spaced apart.

Coil spring may be applied to the elastic member 15, for example, and may be wound around the outer circumferential surface of the tube 14. An upper end of the elastic member 15 directly supports a lower end of the extension part 142. As another example, the intermediate member is interposed on the upper end of the elastic member 15, the extension portion 142 may be placed on the upper side of the intermediate member.

In addition, the elastic member 15 may support the extension part 142 or the intermediate member in a state of being spaced apart from the tube 14 without being wound around the tube 14.

The tube guider 16 is opened up and down. The tube 14 passes through the tube guider 16. The inner diameter of the tube guider 16 may be formed in a size corresponding to the outer diameter of the tube 14.

The lower end of the elastic member 15 is seated on the upper surface of the tube guider 16. That is, the tube guider 16 supports the elastic member 15. The outer diameter of the tube guider 16 may be formed to correspond to the inner diameter of at least a portion of the outer cylinder 10. For example, in the present embodiment, the outer diameter of the tube guider 16 may correspond to the inner diameter of the lower pipe 114. When the outer diameter of the tube guider 16 and the inner diameter of the lower pipe 114 correspond to each other, horizontal movement of the tube guider 16 may be prevented.

The tube guider 16 serves to space the inner surface of the tube 14 and the outer cylinder 10 in addition to supporting the elastic member 15. Therefore, in the process of vertically moving the tube 14, direct friction between the tube 14 and the outer cylinder 10 formed of a metal material can be prevented, thereby preventing friction noise.

In addition, since the tube guider 16 supports the elastic member 15, the tube guider 16 and the elastic member 15 may be supported by a simple structure.

On the other hand, between the extension portion 142 of the tube 14 and the spindle guider 12 is provided with a noise preventing member 18. That is, the noise preventing member 14 is located above the extension part 142 and is located below the spindle guider 12. The noise prevention member 18 may be formed of a rubber material, a resin material, a sponge, a wood material, or the like.

For example, the noise preventing member 18 may be formed in the shape of a ring 18 having an opening 182. The noise preventing member 18 may be fixed to the lower surface of the spindle guider 12 or the inner circumferential surface of the outer cylinder 10 or the extension of the tube 14 by an adhesive. Alternatively, the noise preventing member 18 may be seated on the extension part 142 and may move up and down together with the extension part 142.

Note that there is no limitation in the fixing structure of the noise prevention member 18 in this embodiment. Of course, the noise prevention member 18 may be coupled to the outer cylinder 10 in an interference fit manner.

In the above, it has been described that a single noise preventing member 18 is provided inside the outer cylinder. It may be fixed to the lower surface or the upper surface of the extension.

According to the noise preventing member of the present embodiment, when the tube 14 moved downward together with the piston rod 13 is moved upward by the restoring force of the elastic member 15, the tube 14 and the spindle guider. (12) does not collide directly, and noise can be prevented. In addition, since the tube 14 is in contact with the noise prevention member 18, the noise prevention member 18 absorbs impact force, thereby reducing noise and preventing the extension part 142 from being damaged or deformed. Can be.

Meanwhile, at least one supporter 115 for supporting the washer 17 is formed in the lower pipe 114. The supporter 115 is formed by recessing an outer surface of the lower pipe 114 toward the inside. That is, the supporter 115 is formed by embossing, and protrudes toward the center of the outer cylinder 10. As the supporter 115 is formed by the embossing process, the assembling process of the cylinder may be simplified.

If the washer 17 is fixed to the inner surface of the lower pipe by welding, since the welding dung is attached to the inner surface of the lower pipe during the welding process, a process of smoothing the inner surface of the lower pipe is required. However, according to the present embodiment, since the supporter is formed by embossing, there is an advantage that the work process is simplified by only mounting the washer on the supporter.

A plurality of supporters 115 may be formed in the circumferential direction of the lower pipe 114. In the present embodiment, the washer 17 is seated on the upper side of the supporter 115. Alternatively, the tube guider 16 may be directly seated on the supporter 115.

Hereinafter, the operation of the cylinder 1 will be described.

A case where the gas cylinder according to the present embodiment is applied to a chair will be described.

When a person is seated on the seat plate of the chair or an impact is applied to the seat plate, first, the vertical impact force partially absorbs the impact force into the gas cushion by the internal gas of the spindle 11. At the same time, the piston rod 13 is moved downward. Then, the tube 14 connected to the end of the piston rod 13 moves downward together, and presses the elastic member 15. The elastic member 15 is compressed to absorb the impact force.

On the other hand, when a person occurs in the seat plate portion or the force applied to the seat plate portion is removed, the tube 14 is moved upward by the restoring force of the compressed elastic member 15. Since the extension of the tube 14 moving upward by the restoring force of the elastic member 15 collides with the noise preventing member 18, the impact noise of the tube 14 and the spindle guider 12 may be prevented. have.

3 is an enlarged view of a portion A of FIG. 1 according to a second embodiment.

This embodiment is the same as the first embodiment in other parts, but there is a difference in the structure of the extension portion of the tube. Therefore, hereinafter, only characteristic parts of the exemplary embodiment will be described.

Referring to FIG. 3, the extension of the tube 14 is bent and stacked one or more times. In detail, the extension part includes a first extension part 143 bent in a horizontal direction from the body 141 of the tube and a direction opposite to the extension direction of the first extension part 143 in the first extension part 143. It includes a second extension 144 extending to. The second extension part 144 contacts the top surface of the first extension part 143.

According to the present embodiment, the thickness of the extension parts 143 and 144 is greater than the thickness of the body 141. Therefore, deformation or breakage of the extension part can be reduced.

4 is an enlarged view of a portion A of FIG. 1 according to a third embodiment.

This embodiment is the same as the first embodiment in other parts, but there is a difference in the structure of the extension portion of the tube. Therefore, hereinafter, only characteristic parts of the exemplary embodiment will be described.

Referring to FIG. 4, the tube 14 of the present exemplary embodiment includes a body 141 and an extension 145 extending in a horizontal direction from an upper end of the body 141. The thickness of the extension 145 is greater than the thickness of the body 141. Therefore, deformation or breakage of the extension 145 can be reduced.

5 is a sectional view of a cylinder according to a fourth embodiment.

This embodiment is the same as the first embodiment in other parts, except that there is a difference in the method of fixing the position of the tube guider. Therefore, hereinafter, only characteristic parts of the exemplary embodiment will be described.

Referring to FIG. 5, the outer cylinder of the present embodiment includes an upper pipe 116 and a lower pipe 117. The diameter of the lower pipe 117 is smaller than the diameter of the upper pipe 116. The inner diameter of the lower pipe 117 may correspond to the outer diameter of the tube guider 25.

When the inner diameter of the lower pipe 117 corresponds to the outer diameter of the tube guider 25, horizontal movement of the tube guider 25 may be prevented. However, when the length of the lower pipe 117 is short, it may not effectively prevent the horizontal movement of the tube guider 25. In this case, a ring 26 is provided between the tube guider 25 and the upper pipe 116 to prevent horizontal movement of the tube guider 25. In order for the horizontal movement of the tube guider 25 to be effectively prevented by the ring 26, the ring 26 is preferably spaced apart from the lower pipe 117. Since the upper pipe 116 decreases in diameter toward the lower side, when the ring 26 is positioned at the same point as the diameter of the ring 26 and the inner diameter of the upper pipe 116, the ring 26 No longer moves downward.

6 is a sectional view of a cylinder according to a fifth embodiment.

This embodiment is the same as the first embodiment in other parts, except that there is a difference in the shape of the outer cylinder and the tube guider. Therefore, hereinafter, only characteristic parts of the embodiment will be described.

Referring to FIG. 6, the outer cylinder 30 according to the present embodiment includes an upper pipe 301, a lower pipe 302, and a bent portion 304 connecting the upper pipe 301 and the lower pipe 302. It includes.

The upper pipe 301 may be formed to have a constant diameter or decrease in diameter toward the lower side. The lower pipe 302 may have a constant diameter or may be formed to decrease in diameter toward the lower side. The bent portion 304 functions to rapidly vary the diameter of the lower end of the upper pipe 301 and the diameter of the upper end of the lower pipe 302.

The tube guider 31 of the present embodiment includes a first guider 311 having a first thickness and a second guider 312 extending downward from the first guider 311 and having a second thickness. The inner diameters of the guiders 311 and 312 are formed to be the same. That is, the outer diameter of the first guider 311 and the outer diameter of the second guider 312 are different.

The first guider 311 is seated on the bent portion 304. That is, the bent portion 304 supports the first guider 311. Accordingly, the bent portion 304 may be referred to as a support for supporting the tube guider.

Since the first guider 311 is seated on the bent portion 304, a separate configuration for supporting the tube guider 31, that is, a washer and a supporter, is unnecessary. Therefore, according to the present embodiment, there is an advantage that the structure of the cylinder is simplified, the number of parts is reduced, and the embossing process of the outer cylinder is eliminated.

7 is a sectional view of a cylinder according to a sixth embodiment.

This embodiment is the same as that of the fifth embodiment in other parts, but there are differences in the shapes of the outer cylinder and the tube guider. Therefore, hereinafter, only characteristic parts of the embodiment will be described.

Referring to FIG. 7, the tube guider 32 of the present embodiment is seated at the bent portion 304 of the outer cylinder 30. The contact area between the tube guider 32 and the tube 14 of this embodiment is smaller than the contact area between the tube guider and the tube 14 of the fifth embodiment.

Therefore, in order to prevent friction between the tube 14 and the outer cylinder 30 due to the eccentricity of the tube 14 during the operation of the cylinder, a noise reduction member 33 is provided below the tube 14. Combined. The noise reduction member 33 is formed in a cylindrical shape and surrounds the lower side of the tube 14. The noise reduction member 33 has a hole 332 through which the piston rod 13 passes. The noise reduction member 33 may be formed of, for example, a resin material or other materials.

According to this embodiment, since the friction between the tube 14 and the outer cylinder 30 is prevented by the noise reduction member 33, there is an advantage that the noise can be reduced.

8 is a sectional view of a cylinder according to a seventh embodiment.

Referring to FIG. 8, the cylinder according to the present embodiment includes an outer cylinder 40 having an empty inside, a spindle 41 relative to the outer cylinder 40, and a spindle coupled to an upper side of the outer cylinder 40. A guider 42, a bushing member 47 inserted into the spindle guider 42, a sleeve 48 inserted into the bushing member 47, and a spindle 41 inserted into the spindle 41. Piston rod 43 and relative movement to the piston rod, the tube 44 is connected to the piston rod 43 and moves along with the piston rod 43, and the compression or extension according to the movement of the tube 44 An elastic member 45 and a tube guider 46 for supporting the elastic member 45 and guiding the movement of the tube 44 are included.

In this embodiment, the functions and functions of the tube, the elastic member, and the tube guider for absorbing the shock are the same as those of the first embodiment, and thus detailed description thereof will be omitted.

The outer cylinder 40 is bent to connect the upper pipe 401, the lower pipe 402 having a diameter smaller than the diameter of the upper pipe 401, and the upper pipe 401 and the lower pipe 402. Part 404 is included.

The tube guider 46 is seated in the bent portion 404. That is, the bent portion 404 supports the tube guider 46. Thus, no additional support means for supporting the tube guider 406 is needed.

On the other hand, a support end 422 for supporting the bushing member 47 protrudes from the inner circumferential surface of the spindle guider 42. The outer cylinder 40, the spindle guider 42 and the bushing member 47 are fastened by a single pin P. That is, the pin P is sequentially fastened to the outer cylinder 40, the spindle guider 42, and the bushing member 47 at the outside of the outer cylinder 40.

The sleeve 48 guides the vertical movement of the spindle 41. The sleeve 48 protrudes above the bushing member 47 while being inserted into the bushing member 47. The sleeve 48 allows the stroke period of the spindle 41 to be lengthened.

9 is a sectional view of a cylinder according to an eighth embodiment.

This embodiment is the same as the seventh embodiment in other parts, but differs in the structure of the outer cylinder. Therefore, hereinafter, only characteristic parts of the exemplary embodiment will be described.

Referring to Figure 9, the outer cylinder 50 of the present embodiment is formed so that at least one portion is reduced in diameter toward the lower side. That is, the outer cylinder 50 includes a first portion of which the diameter is reduced. The tube guider 56 is inserted into the first portion 51 of the outer cylinder 50. The outer diameter of the tube guider 56 corresponds to the inner diameter of the first portion 51. That is, the outer diameter of the tube guider 56 decreases toward the lower side.

Thus, when the tube guider 56 is inserted into the outer cylinder 50, the tube guider 56 is positioned in the first portion 51 of the outer cylinder. Since the inner diameter of the first portion 51 of the outer cylinder decreases toward the lower side, the tube guider 56 no longer moves downward in the state of being located in the first portion 51 of the outer cylinder. As a result, the outer cylinder 50 supports the tube guider 56.

Therefore, in the present embodiment, the first portion of the outer cylinder may be referred to as a support for supporting the tube guider.

According to the present embodiment as described above, since the tube guider 56 is supported by the outer cylinder 50, there is no need for a separate supporting means for supporting the tube guider 56.

10 is a sectional view of a cylinder according to the ninth embodiment.

Referring to FIG. 10, the cylinder according to the present embodiment includes an outer cylinder 60 having an empty inside, a spindle 61 relative to the outer cylinder 60, and a spindle coupled to an upper side of the outer cylinder 60. A guider 62, a bushing member 67 inserted into the spindle guider 62 and guiding the up and down movement of the spindle 61, and inserted into the spindle 61 to move relative to the spindle 41. Piston rod 63, the tube 64 is connected to the piston rod 63 and moves together with the piston rod 63, and the elastic member 65 is compressed or extended in accordance with the movement of the tube (64) And a tube guider 66 for supporting the elastic member 65 and guiding the movement of the tube 64.

In this embodiment, the functions and functions of the tube, the elastic member, and the tube guider for absorbing the shock are the same as those of the first embodiment, and thus detailed description thereof will be omitted.

The outer cylinder 60 is bent to connect the upper pipe 601, the lower pipe 602 having a diameter smaller than the diameter of the upper pipe 601, and the upper pipe 601 and the lower pipe 602. Part 604 is included. The tube guider 66 is seated in the bent portion 604.

On the other hand, a support end 622 for supporting the bushing member 67 protrudes from the inner circumferential surface of the spindle guider 62. The outer cylinder 60, the spindle guider 62 and the bushing member 67 are fastened by a single pin P. That is, the pin P is sequentially fastened to the outer cylinder 60, the spindle guider 62, and the bushing member 67 on the outer side of the outer cylinder 60.

The taper holder 71, the taper holder support 74 for seating and rotating the taper holder 71, and pressing the upper end of the gas opening and closing pin 75 inside the spindle 61. Included is a release arm 69, in which an operation is performed and the stop position and movement thereof are guided by the taper holder 71, and a cable 73 for operating the release arm 69. A cable holder 166 for supporting and guiding the cable 73 is formed above the taper holder 71.

Since the structure for operating the release arm 69 is the same as that described in Patent Registration 10-0576756, a detailed description thereof will be omitted.

11 is a sectional view of a cylinder according to a tenth embodiment.

This embodiment is different from the previous embodiments in the structure of the outer cylinder for supporting the tube guider. Therefore, hereinafter, only characteristic parts of the exemplary embodiment will be described.

Referring to Figure 11, the outer cylinder 70 of the present embodiment is formed in a long cylindrical shape in the vertical direction, the lower end is formed with a bent portion 702 that is bent toward the center. The bent portion 702 directly supports the tube guider 72.

Of course, in some cases, a separate intermediate member for supporting the tube guider may be further provided between the bent portion 702 and the tube guider 72. Even in this case, since the bent portion 702 indirectly supports the tube guider 72 by supporting the intermediate member, it may be understood that the bent portion 702 supports the tube guider 72.

10: outer cylinder 11: spindle
12: spindle guider 13: piston rod
14: tube 15: elastic member
16: Tube guider 18: Noise prevention member

Claims (12)

External pain;
A spindle guider coupled to an upper portion of the outer cylinder;
A spindle penetrating the spindle guider and vertically moving;
A piston rod connected to the spindle;
A tube provided inside the outer cylinder and connected to the piston rod to move up and down together with the piston rod;
An elastic member for supporting the tube;
A tube guider for supporting the elastic member and guiding vertical movement of the tube; And
A gas cylinder is disposed between the spindle guider and the tube, the noise cylinder for preventing the impact noise of the tube and the spindle guide. The method of claim 1,
The noise preventing member is in contact with any one of the inner circumferential surface of the outer cylinder, the spindle guider and the tube. The method of claim 1,
The noise preventing member is a gas cylinder is formed with an opening for passing the piston rod. The method of claim 1,
The outer cylinder is formed by embossing, the gas cylinder including one or more supporters protruding toward the center of the outer cylinder. The method of claim 4, wherein
Said tube guider seated in said at least one supporter. The method of claim 4, wherein
And a washer seated on the at least one supporter, the washer supporting the tube guider. The method of claim 1,
The tube includes a hollow body and an extension extending outward from the top of the body,
The thickness of the extension is a gas cylinder larger than the thickness of the body. The method of claim 1,
The tube includes a hollow body and an extension extending outward from the top of the body,
The gas cylinder is bent and laminated one or more times. External pain;
A spindle guider coupled to an upper portion of the outer cylinder;
A spindle penetrating the spindle guider and vertically moving;
A piston rod connected to the spindle;
A tube provided inside the outer cylinder and connected to the piston rod to move up and down together with the piston rod;
An elastic member for supporting the tube; And
It includes a tube guider for supporting the elastic member, and guides the vertical movement of the tube,
The tube guider is a gas cylinder seated on a portion of the outer cylinder is supported by the outer cylinder. The method of claim 9,
The outer cylinder includes a bent portion that is a portion of which the diameter is reduced in the entire length,
The tube guider is a gas cylinder seated in the bent portion. The method of claim 9,
The outer cylinder includes a first portion of which diameter decreases downwards,
The outer diameter of the tube guider is formed in a shape corresponding to the outer diameter of the first portion, the tube guider is supported by the first portion. The method of claim 9,
The inner surface of the outer cylinder and the outer surface of the tube are spaced apart,
A gas cylinder is coupled to the outside of the tube noise reduction member for reducing the noise caused by the friction between the outer cylinder and the tube.

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