KR100583895B1 - Gas cylinder of rotatable chair having auto return/lift - Google Patents

Abstract

The present invention provides an outer cylinder, an upper cam having an inclined surface at a lower end thereof, a lower cam having an inclined surface corresponding to an inclined surface of the upper cam at an upper end thereof, a ring supporting the lower cam, a thrust bearing installed between the ring and the lower cam, A spring supporting the ring, an outer cylinder slide-inserted into the upper and lower cams, an inner cylinder inserted into the outer cylinder, a valve coupled to an upper end of the inner cylinder to circulate gas, and a valve to open and close the flow path inside the valve In the gas cylinder with a fin, the small diameter part formed in the upper end, the middle diameter part extended from the lower side of the said small diameter part, the inclination part extended below the said middle diameter part, and the large diameter extended below the said inclination part A piston rod having a lower portion and fixed to a lower side inside the outer cylinder; A washer having a gas hole on one side and coupled to a small diameter portion of the piston rod; A piston coupled to an upper portion of the piston rod and having an orifice formed on an inner circumferential surface thereof, an inner circumferential o-ring groove formed on an inner circumferential surface of the piston body, and an outer circumferential o-ring groove formed on an outer circumferential surface of the piston body; A piston supporter coupled to the piston rod to support a lower portion of the piston; It provides a gas cylinder for a rotary chair having an auto return / lift function, characterized in that it comprises a piston O-ring inserted into the inner circumferential O-ring groove and the outer circumferential O-ring groove, respectively.

Gas cylinder, piston

Description

Gas cylinder for swivel chair with auto return / lift function {GAS CYLINDER OF ROTATABLE CHAIR HAVING AUTO RETURN / LIFT}             

1 is an internal configuration diagram showing a gas cylinder for a rotary chair according to a conventional embodiment,

2 is an internal configuration diagram showing a gas cylinder for a rotary chair having an auto return / lift function according to a preferred embodiment of the present invention;

3a and 3b are views showing the operating state of the gas cylinder for the rotary chair in accordance with a preferred embodiment of the present invention.

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

130: piston rod 131: small diameter portion

132: middle portion 133: inclined portion

134: large neck 140: washer

150: piston 160: piston supporter

170: piston o-ring 180: rod coiling groove

190: rod coiling

The present invention relates to a gas cylinder, and more particularly, to a gas cylinder for a rotary chair having an auto return / lift function.

Typically, the swivel chair comprises a back plate supporting the user's back and waist, a seat plate supporting the buttocks of the user, a rotating shaft supporting the seat plate, and a leg coupled to a lower end of the rotating shaft, and in the rotating shaft The gas cylinder is provided to provide an elastic force so that the seat plate portion can automatically return.

1 is a diagram illustrating an internal configuration of a gas cylinder for a rotary chair according to a conventional embodiment, which is disclosed in Korean Patent Application Publication No. 2001-0006876, "Height-Assembly Height Assembly for In-Place Returning Swivel Chair."

As shown in FIG. 1, a gas cylinder for a rotating chair according to a conventional embodiment is inserted into an outer cylinder 50, and one side in the axial direction is formed of a piston rod 24 to be fixed to one end of the outer cylinder. The other side of the axial direction is formed by the sleeve member 20 is configured to extend to the outside of the outer cylinder, and is interposed between the outer cylinder and the sleeve member is possible to drive the spindle in the rotational direction and axial direction And a first cam member 30 and a second cam member 40 configured to rotate the spindle to its original position, and the sleeve member 20 has at least one groove 22 on an outer circumference thereof. The first cam member 30 is configured in the axial direction, and the second cam member 40 is fixed to the inner circumferential surface of the outer cylinder so that the sleeve member in which the groove is formed can be driven in the rotational direction and the axial direction. Is a projection formed on the inner circumference A projection is inserted into the groove of the sleeve member to allow the second cam member to move up and down only in the axial direction with respect to the sleeve member, and the second cam member to rotate simultaneously in the rotational direction of the sleeve member. Is installed in, the contact surface of the first cam member and the second cam member forms an inclined surface corresponding to each other, the spring 60 is installed on the lower surface of the second cam member to the second cam member 40 It is configured to push up toward the first cam member 30 ".

However, the above-described gas cylinder for the rotary chair is operated so that the seat plate of the rotary chair can be raised only by operating the valve pin installed at the upper portion. Therefore, when some users leave without a valve pin operation in a place where a large number of swivel chairs are arranged, such as a conference room or an amusement room, the height of the swivel chairs is not aligned, thus providing a distracting environment. There was an inconvenience to arrange the height of the chair.

In order to solve the above problems, an object of the present invention is for a rotating chair having an auto return / lift function, in which the seat plate is automatically set in the original direction as well as always returning to the box point when the user wakes up from the chair. To provide a gas cylinder.

In order to achieve the above object, the present invention provides an outer cylinder, an upper cam having an inclined surface formed on a lower end thereof, a lower cam having an inclined surface corresponding to an inclined surface of the upper cam formed on an upper end thereof, a ring supporting the lower cam, the ring and A thrust bearing installed between the lower cam, a spring supporting the ring, an outer cylinder slide-inserted into the upper and lower cams, an inner cylinder inserted into the outer cylinder, a valve coupled to an upper end of the inner cylinder, and the In the gas cylinder provided with the valve pin which opens and closes the flow path inside a valve, The small diameter part formed in the upper end, the middle diameter part extended from the lower side of the said small diameter part, the inclination part extended in the lower side of the said middle diameter part, and the said A piston rod formed on the lower side of the inclined portion and having a lower end fixed to the inner side of the outer cylinder; A washer having a gas hole on one side and coupled to a small diameter portion of the piston rod; A piston coupled to an upper portion of the piston rod and having an orifice formed on an inner circumferential surface thereof, an inner circumferential o-ring groove formed on an inner circumferential surface of the piston body, and an outer circumferential o-ring groove formed on an outer circumferential surface of the piston body; A piston supporter coupled to the piston rod to support a lower portion of the piston; It provides a gas cylinder for a rotary chair having an auto return / lift function, characterized in that it comprises a piston O-ring inserted into the inner circumferential O-ring groove and the outer circumferential O-ring groove, respectively.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Figure 2 is an internal configuration showing a gas cylinder for a rotary chair having an auto return / lift function according to a preferred embodiment of the present invention, Figures 3a and 3b is a gas cylinder for a rotary chair according to a preferred embodiment of the present invention It is a figure which shows the operation state.

As shown in FIGS. 2, 3A, and 3B, the gas cylinder 100 for a swivel chair having an auto return / lift function according to an exemplary embodiment of the present invention has an outer cylinder 111 and an upper surface having an inclined surface at a lower end thereof. Cam 112, a lower cam 113 having an inclined surface corresponding to the inclined surface of the upper cam at the top, a ring 114 for supporting the lower cam, a thrust bearing 115 provided between the ring and the lower cam, A spring 116 supporting the ring, an outer cylinder 117 slide-inserted into the upper and lower cams, an inner cylinder 118 inserted into the outer cylinder, and a valve 119 coupled to an upper end of the inner cylinder to circulate gas And a valve pin 120 for opening and closing the flow path inside the valve, and particularly, the piston rod 130, the washer 140, the piston 150, the piston supporter 160, and the piston o-rings 170 and 171. And a rod coiling groove 180 and a rod coiling 190. It is.

(1) piston rod

The piston rod 130 is a member having a lower end fixed to the inner side of the outer cylinder 111 and a piston 150 coupled to the upper end. A fixing clip 201, a thrust bearing 202, and a cushion member 203 are installed at the lower end of the piston rod 130.

The piston rod 130 has a small diameter portion 131 formed at an upper end, a middle diameter portion 132 extending from a lower side of the small diameter portion 131, and an inclination extending from a lower side of the middle diameter portion 132. It consists of the large diameter part 134 extended in the lower part of the part 133 and the said inclination part 133.

The small diameter portion 131 of the piston rod 130 is riveted to prevent separation of the washer 140 is formed with a fastener (135).

In addition, the middle portion 132 of the piston rod 130 may be used as a gas passage by forming a groove on the side.

(2) washer

The washer 140 is a member of a circular plate shape in contact with the upper surface of the piston 150 when the piston 150 is raised.

The washer 140 may have a gas hole 141 on one side thereof and is coupled to the small diameter portion 131 of the piston rod 130 and seated on the upper surface of the middle diameter portion 132.

(3) piston

The piston 150 is a member coupled to the upper portion of the piston rod 130 to seal or pressurize the inside of the inner cylinder 118.

The piston 150 is coupled to the upper portion of the piston rod 130 and the piston body 152 and the orifice 151 formed on the inner circumferential surface, and the inner circumferential O-ring groove 154 formed on the inner circumferential surface of the piston body 152 and , An outer circumferential O-ring groove 156 formed on the outer circumferential surface of the piston body 152.

In addition, the piston 150 may be used as a gas passage by forming a groove or orifice on the side of the piston body 152.

(4) piston supporter

The piston supporter 160 is a ring-shaped member coupled to the piston rod 130 to support the lower portion of the piston 150.

The piston supporter 160 has a stepped hole 162 on the inner circumferential surface.

In addition, the piston supporter 160 is coupled to the piston rod 130 by coupling.

(5) piston o-ring

The piston o-rings 170 and 171 are airtight members respectively inserted into the inner circumferential o-ring groove 154 and the outer circumferential o-ring groove 156 formed in the piston 150.

The piston O-ring 170 inserted into the inner circumferential O-ring groove 154 seals the piston rod 130 and the inside of the piston 150 when the piston 150 descends.

On the other hand, the piston O-ring 171 inserted into the outer circumferential O-ring groove 156 always functions to seal between the inner cylinder 118 and the piston 150 regardless of the rise / fall of the piston 150.

(6) rod coiling groove

The rod coiling groove 180 is a groove formed in the outer circumferential surface of the large diameter portion 134 of the piston rod 130, and the rod coiling 190 is inserted therein.

(7) rod coiling

The rod coiling 190 is seated in the rod coiling groove 180 of the piston rod 130.

The rod coiling 190 couples the piston supporter 160 and the piston rod 130 to limit the lowering of the piston supporter 160.

On the other hand, as shown in Figure 3a when the user sits on a chair equipped with a gas cylinder for the rotary chair of the present invention, the piston 150 is moved downward (arrow direction). The gas passes through the gas hole 141 of the washer 140 and the side end of the washer 140 or the hole of the piston 150 to press the piston 150 and the piston supporter 160 to pressurize the piston 150 and the piston supporter. Move 160 down. At this time, the piston O-ring 170 inserted into the inner circumferential O-ring groove 154 of the piston 150 is in close contact with the large diameter portion 134 of the piston rod 130 to seal the gas inside the piston 150.

On the other hand, as shown in FIG. 3B, when the user who is sitting on the chair provided with the gas cylinder for the rotating chair of the present invention stands up, the piston 150 which is being pressed is moved upward again (in the direction of the arrow). Subsequently, the gas moves the piston supporter 160 and the piston 150 upward, and at the same time, the piston o-ring 170 inserted into the inner circumferential o-ring groove 154 of the piston 150 moves upward, thereby moving inside the piston 150. As the orifice 151 is opened, the gas inside the piston 150 is discharged upward through the gas hole 141 of the washer 140 and the gas hole of the piston 150. Thus, the inner cylinder and the outer cylinder are raised up by the initial height, and the seat plate is set in its original position and direction. However, when the piston supporter 160 is jointed to the piston rod 130, only the piston 150 is raised, and the piston supporter 160 may not be raised.

As described above, the gas cylinder for the rotary chair having the auto return / lift function according to the embodiment of the present invention automatically sets the seat plate in the original direction when the user wakes up from the chair, as well as the piston rod, the washer, the piston and the O-ring. By automatically returning to the top dead center by the interaction of the alignment, there is an effect that can easily arrange the place where a large number of swivel chairs installed without a separate alignment.

Claims (4)

An outer cylinder, an upper cam having an inclined surface at the lower end, a lower cam having an inclined surface corresponding to the inclined surface of the upper cam at the upper end, a ring for supporting the lower cam, a thrust bearing provided between the ring and the lower cam, and the ring A spring for supporting, an outer cylinder slide-inserted into the upper and lower cams, an inner cylinder inserted into the outer cylinder, a valve coupled to an upper end of the inner cylinder to circulate gas, and a valve pin for opening and closing a flow path inside the valve; In one gas cylinder, It consists of a small diameter portion formed on the upper end, a middle diameter portion extending from the lower side of the small diameter portion, an inclined portion extending below the middle diameter portion and a large diameter portion extending below the inclined portion, the lower end of the outer cylinder A piston rod fixed to the inner lower side; A washer having a gas hole on one side and coupled to a small diameter portion of the piston rod; A piston coupled to an upper portion of the piston rod and having an orifice formed on an inner circumferential surface thereof, an inner circumferential o-ring groove formed on an inner circumferential surface of the piston body, and an outer circumferential o-ring groove formed on an outer circumferential surface of the piston body; A piston supporter coupled to the piston rod to support a lower portion of the piston; Gas cylinder for a rotary chair having an auto return / lift function, characterized in that it comprises a piston O-ring respectively inserted in the inner circumferential O-ring groove and the outer circumferential O-ring groove. The method of claim 1, A rod coiling groove formed on an outer circumferential surface of the large diameter portion; And a rod coiling inserted into the rod coiling groove, wherein the gas cylinder for the rotary chair has an auto return / lift function. The method of claim 1, A gas cylinder for a rotary chair having an auto return / lift function, characterized in that the middle diameter portion of the piston rod forms a groove on the side to be used as a gas passage. The method of claim 1, Gas cylinder for a rotary chair having an auto return / lift function, characterized in that the groove formed in the piston body side of the piston used as a gas passage.

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