KR100979183B1 - A gas cylinder with a damping spring - Google Patents

Abstract

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

According to the present invention, there is provided a gas cylinder, which has a hollow pipe shape and a bushing member 120 coupled to an upper side thereof; A cylinder member 200 which is inserted into the guide hole formed in the center of the bushing member 120 along the axial direction and is lowered according to the operation of the piston rod 220; The valve is provided on the upper side of the cylinder member 200 to move the piston rod 220 forward and backward by changing the gas flow path according to the operation of the button 320 to raise and lower the cylinder member 200 from the can 100. Sieve 300; A sleeve 500 into which the piston rod 220 is inserted, in which an end of the piston rod 220 is rotatably fixed through a bearing, and a support piece 520 protrudes outwardly outside the upper end; A spring 400 having a lower side supported in the can 100 and an upper side supported by the support piece 520 of the sleeve 500 to generate compression and restoring force; And a sleeve guider 600 provided at a lower inner side of the can 100 to slide and guide the lifting and lowering of the sleeve 500.

Gas cylinder,

Description

Shock Absorbing Gas Cylinder {A GAS CYLINDER WITH A DAMPING SPRING}

The present invention relates to a gas cylinder, and more particularly, when the gas cylinder is applied to a chair and seated on the seat of the chair, a spring cushion is provided along with the gas cushion, and the left and right biases are not generated when the cushion is operated. The present invention relates to a shock-absorbing gas cylinder that can provide cushioning force even at a point position, thereby minimizing impact force received by the seated person.

In general, the gas cylinder is mainly applied to the seat plate height adjustment structure of the chair to play a role of raising and lowering the seat plate through the gas pressure according to the user's selection.

Such a gas cylinder is mainly applied to a chair, as is known in the art, to raise and lower the seat plate while the cylinder member is lifted by the support of the piston rod during operation through the seating lever of the seated person, and stops after the cylinder member is lowered. In other words, when the load of the seated person is generated, gas pressure is applied inside the cylinder member by the bearing force of the piston rod, and the cushioning force is provided through the gas pressure at this time, thereby relieving the burden on the seated person to some extent.

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

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 at the lowest position, the damper can absorb the minimum impact force by the compression of the damper, but the compression section of the damper provides a shock repulsion force to the seated person. There has been a problem that complains of pain due to the burden on the seated person.

In order to solve the above problems, the applicant of the present application filed a utility model registration No. 20-0385429 filed on March 14, 2005, "gas cylinder having a shock absorption function".

1, the cylinder member 20 having the piston rod 22, the valve body for changing the gas flow path in accordance with the button operation, the outer cylinder 10 for guiding the cylinder member 20 and In the gas cylinder composed of the housing 12 for guiding the outer cylinder 10 to slide, the outer cylinder 10 is inserted into the housing 12 to move up and down, and a spring ( 40 so that the lower end of the outer cylinder 10 compresses the spring 40 during the forward and backward movement of the piston rod 22, so that the spring by the spring together with the gas cushion when the cylinder member 20 is raised and lowered The cushion is to be provided.

However, the gas cylinder can provide a stable cushioning force by the gas cushion and the spring cushion at the same time seating the user's chair, but the spring is located in the lower portion of the outer cylinder unnecessarily lengthen the length of the gas cylinder to increase the economic cost There is.

In addition, the spring is compressed during the lowering operation of the outer cylinder by the piston rod, when there is a large gap between the housing and the outer cylinder to cause an external force such as a single load may cause damage to the gas cylinder.

Accordingly, the present invention was made to solve the above problems, the object of the present invention,

first; In the size of a general gas cylinder, the cushion provided by the gas provided in the gas cylinder and the cushion by the spring is made at the same time when the chair is seated to provide comfort and stability to the seated person.

second; The sleeve for compressing the spring during the forward operation of the piston rod in the gas cylinder is guided by the sleeve guider to prevent the left and right eccentricity of the sleeve.

third; The inner circumferential surface of the sleeve guider is formed of a plurality of protrusion members to minimize the friction force when the sleeve is moved forward and backward, and also to allow the cushion to be operated smoothly.

fourth; The sleeve and the guide guider are allowed to move up and down while the rotation is prevented so that only the up and down motion is induced.

fifth; Spring cushioning force can be provided even at the maximum distance of the piston rod forward and backward with respect to the cylinder member to be comfortable seating even in the top or bottom position of the seat plate when applied to the chair.

In order to achieve the above object, the present invention, the can has a hollow pipe shape and the bushing member is coupled to the upper side; A cylinder member which slides in an axial direction in a guide hole formed at the center of the bushing member and is lowered in accordance with the operation of the piston rod; A valve body provided at an upper side of the cylinder member to move the piston rod back and forth by changing a gas flow path according to a button operation to move the cylinder member up and down from the can; A sleeve in which the piston rod is inserted and an end of the piston rod is rotatably fixed through a bearing inside the lower end, and a support piece protrudes outwardly outside the upper end; A spring having a lower portion supported in the can and an upper portion supported by a support piece of the sleeve to generate compression and restoring force; And a sleeve guider provided inside the lower portion of the can to slide guide the lifting and lowering of the sleeve.

Here, a plurality of protrusions in sliding contact with the sleeve are formed along the inner circumferential surface of the sleeve guider.

In addition, the sleeve guider and the sleeve in sliding contact therewith may be coupled to each other by a guide protrusion and a guide rail to prevent rotation of the sleeve relative to the sleeve guider.

In addition, a spacer may be provided between the lower inner circumferential surface of the can and the sleeve guider, and the upper end of the spacer may support the lower end of the spring.

In addition, the bushing member is fixedly coupled to the can with a fastener, and an outer side of the upper end is formed with an extension projecting outwardly to be supported by the upper end of the can, the lower end is preferably configured to support the upper end of the sleeve. .

The gas cylinder for shock absorption according to the present invention,

first; In the size of a general gas cylinder, the cushion provided by the gas provided in the gas cylinder and the cushion provided by the spring when the chair is seated at the same time there is an effect that can provide comfort and stability to the occupant at all times.

second; The sleeve for compressing the spring during the forward operation of the piston rod in the gas cylinder is guided by the sleeve guider has the effect of preventing the left and right eccentricity of the sleeve.

third; By minimizing the frictional force of the sleeve forward and backward, it is possible to maintain structural stability and to smoothly operate the cushion.

fourth; Partial design change is possible so that the sleeve and the guide guider can be raised and lowered in a state where rotation is prevented, so there is an effect that can be selectively applied according to the conditions of the chair and the like.

fifth; Spring cushioning force is provided even at the maximum distance of the piston rod forward and backward with respect to the cylinder member, when applied to the chair has the effect of comfortable seating even in the top or bottom position of the seat plate.

Hereinafter, a preferred embodiment of the shock absorbing gas cylinder according to the present invention will be described, and in the following description of the present invention, if it is determined that the related art, etc. can obscure the gist of the present invention, the detailed description thereof will be omitted. do.

The present invention is provided in the pipe-shaped can 100, the cylinder member 200 is inserted into the can 100, the cylinder member 200 by changing the gas flow path as shown in FIGS. A valve body 300 for advancing and retracting the rod 220, a spring 400 for alleviating the impact of the piston rod 220, and the spring 400 while being raised and lowered according to the forward and backward motion of the piston rod 220. It consists of a gas cylinder including a sleeve 500 for compressing the guide, a sleeve guider 600 for guiding the sleeve 500 to provide a gas cushion and a spring cushion when the chair is seated.

The can 100 has the same structure as a known gas cylinder, has a hollow pipe shape, and a bushing member 120 is coupled to an upper side thereof.

The bushing member 120 is formed with an extension 122 projecting outward so that the upper end of the can 100 is supported by the upper end of the bushing member 120 and fixed to the can 100 by a fastener 130. It is prevented when the lifting and lowering of the cylinder member 200 to be described later, the upper end of the sleeve 500 is closely supported.

The cylinder member 200 is applied to a known gas cylinder, and slides into the bushing member 120 of the can 100 and moves up and down according to the operation of the piston rod 220.

The valve body 300 is applied to a known gas cylinder, and is provided to the cylinder member 200 to advance the piston rod 220 back and forth by changing the gas flow path according to the operation of the button 320. The cylinder member 200 is raised and lowered from 100.

The spring 400 is a well-known coiled spring is applied, it is provided in the can 100 to generate a compression and restoring force during the forward and backward operation of the piston rod 220.

The sleeve 500 is formed in a pipe-like structure in which the lower part is closed and the upper part is open, and the end of the piston rod 220 is rotatably fixedly fixed through the bearing 224 at the inner center position of the closed lower end part. The support piece 520 is formed to be bent outward at the upper end of the sleeve 500, and the bottom surface of the support piece 520 supports the upper end of the spring 400.

That is, when the sleeve 500 coupled thereto moves when the piston rod 220 moves downward, the support piece 520 provided on the upper side of the sleeve 500 compresses the spring 400 so that the piston rod 200 is moved. ) To alleviate the impact force of the cylinder member 200 forward and backward.

The sleeve guider 600 is provided in the lower inner side of the can 100 to be combined to surround the outer appearance of the sleeve 500, and the lowering and lowering of the sleeve 500 in a coupled state to the can 100. Slide guide.

In addition, on the inner circumferential surface of the sleeve guider 600, a plurality of protrusions 620 are formed to project at regular intervals repeatedly and repeatedly along the circumference, and the protrusions 620 are in contact with the inner circumferential surface of the sleeve 500 during slide contact. Minimize contact area.

As another example, although not shown, the contact surface of the sleeve guider 600 and the sleeve 500 in sliding contact with the sleeve guider 600 is a known configuration and configured to be mutually coupled by guide guides and guide rails applied to a structure for preventing rotation. It is possible for the sleeve 500 to be slid relative to the sleeve guider 600 to be prevented from rotating.

In addition, the spacer 700 may be provided between the lower inner circumferential surface of the can 100 and the sleeve guider 600, and the upper end of the spacer 700 may support the lower end of the spring 400. In addition, it will be possible to provide a separate holder so that the lower portion of the spring 400 is inserted and supported at the top of the spacer 700.

The spacer 700 supports the sleeve guider 600 between the can 100 to compensate for the gap between the can 100 and the sleeve guider 600.

Referring to the operating state of the shock absorbing gas cylinder according to the present invention configured as described above are as follows.

When the gas cylinder of FIG. 2 according to the present invention is applied to a chair, first, when the seat is seated on the chair, the impact force is partially absorbed into the gas cushion by the gas inside the cylinder member 200 as shown in FIG. 3. 4, when the end of the piston rod 220 moves downward as shown in FIG. 4, the sleeve 500 connected to the end of the piston rod 220 moves and at the same time, the sleeve 500 is spring 400. ) And absorbs the impact force.

In this case, the sleeve guider 600 slides the sleeve 500 stably to prevent the left and right flow force of the piston rod 220.

In addition, according to the weight of the chair occupant the gas cushion and the spring cushion can be continuously operated to maximize the buffering effect.

The present invention is applied to a chair, a table, etc., the height of which can be adjusted.

1 is a longitudinal sectional view of a conventional gas cylinder for shock absorption;

2 is a longitudinal sectional view of a gas cylinder for shock absorption according to the present invention;

3 is an enlarged view of a portion “B” of FIG. 2 before the impact force is generated on the cylinder member;

Figure 4 is an enlarged view of the main portion of the state in which the impact force is generated in the cylinder member is compressed in the operating state of FIG.

<Description of the symbols for the main parts of the drawings>

100: can 120: bushing member

200: cylinder member 220: piston rod

300: valve body

400: spring

500: sleeve 520: support piece

600: sleeve guider 620: projection

700: spacer

Claims (5)

In the gas cylinder, Can 100 having a hollow pipe shape and the bushing member 120 is coupled to the inside of the upper; A cylinder member 200 which is inserted into the guide hole formed in the center of the bushing member 120 along the axial direction and is lowered according to the operation of the piston rod 220; The valve is provided on the upper side of the cylinder member 200 to move the piston rod 220 forward and backward by changing the gas flow path according to the operation of the button 320 to raise and lower the cylinder member 200 from the can 100. Sieve 300; A sleeve 500 into which the piston rod 220 is inserted, in which an end of the piston rod 220 is rotatably fixed through a bearing, and a support piece 520 protrudes outwardly outside the upper end; A spring 400 having a lower side supported in the can 100 and an upper side supported by the support piece 520 of the sleeve 500 to generate compression and restoring force; A sleeve guider (600) provided inside the bottom of the can (100) to slide guide the lifting and lowering of the sleeve (500); The sleeve guider 600 and the sleeve 500 in sliding contact with each other are coupled to each other by a guide protrusion and a guide rail vertically formed so that the sleeve 500 is prevented from rotating with respect to the sleeve guider 600. To descend; A spacer 700 is provided between the lower inner circumferential surface of the can 100 and the sleeve guider 600 such that an upper end of the spacer 700 supports a lower end of the spring 400; The bushing member 120 is fixedly coupled to the can 100 by a fastener 130, and an extension 122 protruding outward is formed at an upper end of the bushing member 120 so as to be supported by an upper end of the can 100. A gas cylinder for shock absorption, characterized in that the lower end is configured to be supported on the top of the sleeve (500). delete delete delete delete

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