US20140145483A1 - Column unit for chair - Google Patents
Column unit for chair Download PDFInfo
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- US20140145483A1 US20140145483A1 US14/113,028 US201214113028A US2014145483A1 US 20140145483 A1 US20140145483 A1 US 20140145483A1 US 201214113028 A US201214113028 A US 201214113028A US 2014145483 A1 US2014145483 A1 US 2014145483A1
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- United States
- Prior art keywords
- outer pipe
- column unit
- chair
- spindle
- pipe
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/20—Chairs or stools with vertically-adjustable seats
- A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/366—Special sealings, including sealings or guides for piston-rods functioning as guide only, e.g. bushings
Definitions
- the present invention relates to a column unit for a chair in which an inclined part of an outer pipe is directly secured to a chair base to provide a good appearance and diversify design of the chair, and more particularly to a column unit for a chair which has a compact configuration and can improve the durability against a lateral force applied to an axis thereof.
- a gas cylinder is applied to a height control device of a chair.
- the gas cylinder as shown in FIGS. 1 a and 1 b, includes an outer pipe 5 ; a spindle assembly 2 inserted within the outer pipe 5 and moved upward or downward when a gas fluid passage of a valve 8 b is changed, in which the exposed end portion of a piston rod 6 provided within the outer pipe 5 is secured to the bottom surface of the outer pipe 5 ; and a spindle guide 4 provided within the upper side of the outer pipe 5 for guiding and supporting the upward or downward movement of the spindle assembly 2 .
- Operation of the gas cylinder constructed above is as follows. If a button (not shown) is pressed to operate a gas open/close pin 8 connected with the valve 8 b, the gas fluid passage of the valve 8 b is opened. At this time, the gas stored within the spindle assembly 2 is introduced through the fluid passage 2 a of the valve to push a piston 5 a. Hence, the spindle assembly 2 is then raised to move a seating plate of the chair upward. When the button is released at a certain position of the seating plate being moved, the fluid passage 2 a of the valve 8 b is closed to maintain the fixed state of the seating plate.
- the thickness of the spindle guide 10 i.e., the outer diameter of the spindle guide 10 is further increased as shown in FIG. 2 in order to support the spindle assembly more stably.
- the upper diameter of the outer pipe 20 is increased. Accordingly, a tapered part L and a linear part T are formed in a certain length at the upper portion of the outer pipe 20 , respectively, and then the linear part T is designed to support the spindle guide 10 .
- a gas open/close pin 8 As shown in FIGS. 1 a and 1 b, a gas open/close pin 8 , a tapered holder 8 a, a valve 8 b and a fluid passage 2 a are provided within the spindle assembly 2 in the same manner.
- a spindle guide 4 is inserted within the outer pipe 5 , and a piston 5 a, a piston rod 6 , a cushion cover 6 a and a bearing assembly 6 b may be installed in the outer pipe 5 .
- the conventional column unit for the chair has a construction in which the spindle guide 4 is installed in the outer pipe 5 with an upper wide part and a lower narrow part, and the spindle assembly 2 is installed along the inner surface of the spindle guide 4 .
- the spindle guide 4 is secured to the outer pipe 5 through a securing pin 7 (or a spring pin).
- an outer pipe has a tapered shape from its upper end portion in order to render a stable feeling in its appearance as well as a simple design, in which the outer pipe of the gas cylinder is almost abutted to the base of the chair.
- the conventional column unit for the chair has drawbacks in that when the user seated in the chair moves forward, rearward, leftward or rightward (at 360° in any direction) as shown in FIG. 1 b, a bending moment is repetitively applied to the column unit, so that the spindle guide 4 connected with the outer pipe through the securing pin 7 is gradually derailed with a lapse of time, thereby disengaging the outer pipe 5 from being fixed.
- Cited reference 1 Korean Patent Registration No. 10-0687222
- Cited reference 2 Korean Patent Registration No. 10-0477072
- an object of the present invention is to provide a column unit for a chair which can construct the column unit with a compact configuration and improve the durability against a lateral force, which refers to a horizontal load applied at 360° in any direction with respect to a vertical axis of the column unit.
- a column unit for a chair to adjust a height of the chair by moving a spindle assembly upward or downward within the column unit including: a cylindrical outer pipe; a piston rod inserted within the outer pipe so as to provide a gas fluid passage of a valve within the outer pipe, the piston rod having an exposed end portion fixed to a bottom surface of the outer pipe; the spindle assembly being moved upward or downward when the gas fluid passage is changed by the piston rod; a spindle guide provided within an upper side of the outer pipe to guide and support an upward or downward movement of the spindle assembly; and an inner pipe inserted within the outer pipe to define a space between an inclined part of the outer pipe and the inner pipe, wherein the outer pipe has a gradually increasing diameter toward an end portion of the outer pipe so that the outer pipe has the inclined part, and the spindle guide is inserted within the inner pipe to guide the upward or downward movement of the spindle assembly.
- a column unit for a chair to adjust a height of the chair by moving a spindle assembly upward or downward within the column unit
- the column unit including: a cylindrical outer pipe; a piston rod inserted within the outer pipe so as to provide a gas fluid passage of a valve within the outer pipe, the piston rod having an exposed end portion fixed to a bottom surface of the outer pipe; and the spindle assembly being moved upward or downward when the gas fluid passage is changed by the piston rod; a spindle guide provided within an upper side of the outer pipe to guide and support an upward or downward movement of the spindle assembly, wherein the outer pipe has a gradually increasing diameter toward an end portion of the outer pipe so that the outer pipe has the inclined part, and the outer pipe is integrally formed with a securing part being curved at its end portion to encompass the end outer peripheral surface of the spindle guide.
- the outer pipe may have a linear part extending by a predetermined length from the inclined part.
- the outer pipe is formed with an engagement jaw inside of its end portion, and the end portion of the inner pipe is curved outward to be rested on the engagement jaw.
- the outer and inner pipes may be secured to each other by pressing their outer surfaces.
- the inner pipe may be provided with at least one through hole along the outer periphery of its end portion.
- the inner pipe may be formed with an engagement protrusion on its inside, and the spindle guide is formed with an engagement recess on its outside into which the engagement protrusion is inserted.
- a column unit for a chair to adjust the height of the chair by moving a spindle assembly upward or downward within the column unit which includes a cylindrical outer pipe, a spindle assembly inserted within the outer pipe and moved upward or downward when the gas fluid passage of a valve is changed in which the exposed end portion of a piston rod provided in the outer pipe is secured to the bottom surface of the outer pipe, and a spindle guide provided within the upper side of the outer pipe for guiding and supporting an upward or downward movement of the spindle assembly, wherein the outer pipe is formed with an inclined part having a gradually increasing diameter toward its end portion, and wherein the outer pipe is integrally formed with a securing part being curved at its end portion to encompass the end outer peripheral surface of the spindle guide.
- the spindle guide may be formed with at least one engagement step on its outer peripheral surface.
- the spindle guide may have a seating part circumferentially formed at an upper end portion of the spindle guide, the securing part of the outer pipe being seated in the seating part and the seating part being fixed to the securing part while being engaged with the securing part.
- the present invention has effects in that the inner and outer pipes are secured to each other by pressing themselves, so as to improve an installation performance, thereby enhancing production efficiency. Moreover, the spindle guide and the inner pipe maintain a parallel and intimately contacted state to uniformly accommodate the load transversely applied thereto, thereby increasing the durability of the device.
- a tapered part is formed from the upper end portion of the outer pipe, which makes a good appearance when being mounted onto the chair or the chair base and then diversifies the chair design.
- FIG. 1 a is a sectional view illustrating a construction of a conventional column unit
- FIG. 1 b is a sectional view illustrating a case when a lateral force is applied to the column unit of FIG. 1 a;
- FIG. 2 is a sectional view exemplifying the column unit of a conventional gas cylinder
- FIG. 3 a is a sectional view illustrating a construction of an assembly of a column unit for a chair according to a first embodiment of the present invention
- FIG. 3 b is a sectional view illustrating the assembly of the column unit for the chair in detail according to the first embodiment of the present invention
- FIG. 4 a is a sectional view illustrating a construction of an assembly of a column unit for a chair having a long-type taper according to a second embodiment of the present invention
- FIG. 4 b is a sectional view illustrating the construction of the assembly of the column unit for the chair shown in FIG. 4 a , in which a spindle assembly is removed;
- FIG. 4 c is a sectional view illustrating the construction of the assembly of the column unit for the chair shown in FIG. 4 b , in which a spindle guide is removed;
- FIG. 4 d is a sectional view illustrating an outer pipe which is a structural element of the assembly of the column unit for the chair shown in FIG. 4 a;
- FIG. 5 a is a sectional view illustrating a construction of an assembly of a column unit for a chair having an all-type taper according to a third embodiment of the present invention
- FIG. 5 b is a sectional view illustrating the construction of the assembly of the column unit for the chair shown in FIG. 5 a , in which a spindle assembly is removed;
- FIG. 5 c is a sectional view illustrating the construction of the assembly of the column unit for the chair shown in FIG. 5 b , in which a spindle guide is removed;
- FIG. 5 d is a sectional view illustrating an outer pipe which is a structural element of the assembly of the column unit for the chair shown in FIG. 5 a , in which an upper end of the outer pipe is curled;
- FIG. 6 is a sectional view illustrating an inner pipe of the assembly of the column unit for the chair according to the embodiments of the present invention.
- FIG. 7 is a sectional view illustrating an outer pipe of the assembly of the column unit for the chair according to the embodiments of the present invention.
- FIG. 8 is a side view illustrating a spindle guide of the assembly of the column unit for the chair according to the embodiments of the present invention.
- FIG. 9 is a sectional view illustrating the spindle guide shown in FIG. 8 ;
- FIG. 10 a is a sectional view illustrating an assembly of a column unit for a chair according to a fourth embodiment of the present invention.
- FIG. 10 b is a partially enlarged view illustrating a portion ‘A’ of FIG. 10 a ;
- FIG. 10 c is a partially enlarged view illustrating a securing part of FIG. 10 a.
- a column unit for a chair may be applied to a gas cylinder having a gas open/close pin 8 , a tapered holder 8 a, a valve 8 b and a piston 5 a within a spindle assembly 2 .
- Reference numerals 6 , 6 a, and 6 b indicate a piston rod, a cushion rubber, and a bearing assembly, respectively, which are elements provided in a conventional gas cylinder, so detailed descriptions thereof will be omitted.
- the column unit for the chair includes an outer pipe 10 , an inner pipe 20 and a spindle guide 30 .
- the length of the inclined part 12 of the outer pipe 10 may be varied depending on a user's need.
- it may be provided in the form a long-type taper having a liner part H on its upper end portion, or an all-type taper which is directly inclined from the upper end portion, excluding the linear part H as shown in FIGS. 5 a to 5 d.
- the inner pipe 20 is formed in a circular shape and provided with a bent portion 21 which is vertically curved outward at its end portion.
- the bent portion 21 is seated in the engagement jaw 14 of the outer pipe 10 when assembled.
- an engagement protrusion 22 is obliquely projected inward at the inner end portion of the inner pipe 20 .
- a plurality of through holes h may be formed at the outer periphery of the bent portion 21 . These through holes h serve as a kind of drainage during a painting process of the column unit, which prevents water from remaining in the column unit to prevent the column unit from being rusted.
- the inner pipe 20 may be secured to the outer pipe 10 by being pressed against the outer surface of the outer pipe 10 in a state of being inserted within the outer pipe 10 .
- the pressed area is illustrated as a compressed part 15 .
- a space 13 is formed between the inclined part 12 of the outer pipe 10 and the outer surface of the inner pipe 20 .
- the spindle guide 30 includes a head portion 31 and a body portion 32 as shown in FIGS. 8 and 9 .
- the head portion 31 is formed with a mounting end 31 a to be extended outward, and the mounting end 31 a is installed in close contact with the end portions of the outer pipe 10 and the inner pipe 20 .
- the engagement protrusion 22 maintains an engagement state within the engagement recesses 33 of the spindle guide 30 , so that the spindle guide 30 cannot be derailed outward when being inserted within the inner pipe 20 .
- the spindle assembly 2 is inserted within the spindle guide 30 .
- the inner peripheral surface of the spindle guide 30 and the outer peripheral surface of the spindle assembly 2 maintain a parallel insertion state. Accordingly, even if a load is applied in a lateral direction, i.e., at 360° in any direction with respect to a vertical axis of the column unit, the load will be applied to the entire contact surface between the spindle guide 30 and the spindle assembly 2 , which makes it possible to prevent generation of a load concentration in a local area.
- the inclined part 12 formed in the outer pipe 10 creates a space 13 between the inner pipe 20 as a cavity to be inserted and seated at a central hole of a chair base, which can minimize loss of materials during a machining process thereof and can be secured to each other by being pressed, thereby improving a production efficiency.
- the construction of the device can be simplified, which makes it possible to decrease the manufacturing cost and improve the installation efficiency.
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- Chairs Characterized By Structure (AREA)
Abstract
Description
- This application is the U.S. national phase of International Application No. PCT/KR2012/003187 filed 25 Apr. 2012 which designated the U.S. and claims priority to KR 10-2011-0040989 filed 29 Apr. 2011, the entire contents of each of which are hereby incorporated by reference.
- 1. Field of the Invention
- The present invention relates to a column unit for a chair in which an inclined part of an outer pipe is directly secured to a chair base to provide a good appearance and diversify design of the chair, and more particularly to a column unit for a chair which has a compact configuration and can improve the durability against a lateral force applied to an axis thereof.
- 2. Description of the Prior Art
- As generally known in the art, a gas cylinder is applied to a height control device of a chair. The gas cylinder, as shown in
FIGS. 1 a and 1 b, includes anouter pipe 5; aspindle assembly 2 inserted within theouter pipe 5 and moved upward or downward when a gas fluid passage of avalve 8 b is changed, in which the exposed end portion of apiston rod 6 provided within theouter pipe 5 is secured to the bottom surface of theouter pipe 5; and aspindle guide 4 provided within the upper side of theouter pipe 5 for guiding and supporting the upward or downward movement of thespindle assembly 2. - Operation of the gas cylinder constructed above is as follows. If a button (not shown) is pressed to operate a gas open/
close pin 8 connected with thevalve 8 b, the gas fluid passage of thevalve 8 b is opened. At this time, the gas stored within thespindle assembly 2 is introduced through thefluid passage 2 a of the valve to push apiston 5 a. Hence, thespindle assembly 2 is then raised to move a seating plate of the chair upward. When the button is released at a certain position of the seating plate being moved, thefluid passage 2 a of thevalve 8 b is closed to maintain the fixed state of the seating plate. - Meanwhile, when the gas cylinder as mentioned above is not applied to the conventional chair but to a special-type chair having a relatively high position which is popular recently, the thickness of the
spindle guide 10, i.e., the outer diameter of thespindle guide 10 is further increased as shown inFIG. 2 in order to support the spindle assembly more stably. Here, the upper diameter of theouter pipe 20 is increased. Accordingly, a tapered part L and a linear part T are formed in a certain length at the upper portion of theouter pipe 20, respectively, and then the linear part T is designed to support thespindle guide 10. - However, as to the conventional gas cylinder with these constructions, there may be a case in which the upper linear part T of the
outer pipe 20 has to be shorter depending upon a user's need. At this moment, if the linear part T is less than a certain length, the linear part T cannot support thespindle guide 10, which has drawbacks in that thespindle guide 10 is derailed when using the gas cylinder. - As shown in
FIGS. 1 a and 1 b, a gas open/close pin 8, atapered holder 8 a, avalve 8 b and afluid passage 2 a are provided within thespindle assembly 2 in the same manner. Aspindle guide 4 is inserted within theouter pipe 5, and apiston 5 a, apiston rod 6, acushion cover 6 a and abearing assembly 6 b may be installed in theouter pipe 5. - Meanwhile, the conventional column unit for the chair has a construction in which the
spindle guide 4 is installed in theouter pipe 5 with an upper wide part and a lower narrow part, and thespindle assembly 2 is installed along the inner surface of thespindle guide 4. Here, thespindle guide 4 is secured to theouter pipe 5 through a securing pin 7 (or a spring pin). - Recently, a gas cylinder with a simple design in its appearance has been preferred, and an outer pipe has a tapered shape from its upper end portion in order to render a stable feeling in its appearance as well as a simple design, in which the outer pipe of the gas cylinder is almost abutted to the base of the chair.
- However, the conventional column unit for the chair has drawbacks in that when the user seated in the chair moves forward, rearward, leftward or rightward (at 360° in any direction) as shown in
FIG. 1 b, a bending moment is repetitively applied to the column unit, so that thespindle guide 4 connected with the outer pipe through the securingpin 7 is gradually derailed with a lapse of time, thereby disengaging theouter pipe 5 from being fixed. - In other words, there are drawbacks in that when the chair has been used for a long period of time, while the user seated in the chair moves forward, rearward, leftward or rightward, the bending moment due to a lateral force has been continuously applied so as to raise (push upward) the
spindle guide 4 along the upper part of theouter pipe 5, thereby remarkably degrading the durability of the column unit for the chair. - Cited reference 1: Korean Patent Registration No. 10-0687222
- Cited reference 2: Korean Patent Registration No. 10-0477072
- Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a column unit for a chair which can construct the column unit with a compact configuration and improve the durability against a lateral force, which refers to a horizontal load applied at 360° in any direction with respect to a vertical axis of the column unit.
- In accordance with one embodiment of the present invention to accomplish this object, there is provided a column unit for a chair to adjust a height of the chair by moving a spindle assembly upward or downward within the column unit, the column unit including: a cylindrical outer pipe; a piston rod inserted within the outer pipe so as to provide a gas fluid passage of a valve within the outer pipe, the piston rod having an exposed end portion fixed to a bottom surface of the outer pipe; the spindle assembly being moved upward or downward when the gas fluid passage is changed by the piston rod; a spindle guide provided within an upper side of the outer pipe to guide and support an upward or downward movement of the spindle assembly; and an inner pipe inserted within the outer pipe to define a space between an inclined part of the outer pipe and the inner pipe, wherein the outer pipe has a gradually increasing diameter toward an end portion of the outer pipe so that the outer pipe has the inclined part, and the spindle guide is inserted within the inner pipe to guide the upward or downward movement of the spindle assembly.
- In accordance with another embodiment of the present invention, there is provided a column unit for a chair to adjust a height of the chair by moving a spindle assembly upward or downward within the column unit, the column unit including: a cylindrical outer pipe; a piston rod inserted within the outer pipe so as to provide a gas fluid passage of a valve within the outer pipe, the piston rod having an exposed end portion fixed to a bottom surface of the outer pipe; and the spindle assembly being moved upward or downward when the gas fluid passage is changed by the piston rod; a spindle guide provided within an upper side of the outer pipe to guide and support an upward or downward movement of the spindle assembly, wherein the outer pipe has a gradually increasing diameter toward an end portion of the outer pipe so that the outer pipe has the inclined part, and the outer pipe is integrally formed with a securing part being curved at its end portion to encompass the end outer peripheral surface of the spindle guide.
- The outer pipe may have a linear part extending by a predetermined length from the inclined part.
- The outer pipe is formed with an engagement jaw inside of its end portion, and the end portion of the inner pipe is curved outward to be rested on the engagement jaw. The outer and inner pipes may be secured to each other by pressing their outer surfaces.
- The inner pipe may be provided with at least one through hole along the outer periphery of its end portion.
- The inner pipe may be formed with an engagement protrusion on its inside, and the spindle guide is formed with an engagement recess on its outside into which the engagement protrusion is inserted.
- In accordance with still another embodiment of the present invention, there is provided a column unit for a chair to adjust the height of the chair by moving a spindle assembly upward or downward within the column unit, which includes a cylindrical outer pipe, a spindle assembly inserted within the outer pipe and moved upward or downward when the gas fluid passage of a valve is changed in which the exposed end portion of a piston rod provided in the outer pipe is secured to the bottom surface of the outer pipe, and a spindle guide provided within the upper side of the outer pipe for guiding and supporting an upward or downward movement of the spindle assembly, wherein the outer pipe is formed with an inclined part having a gradually increasing diameter toward its end portion, and wherein the outer pipe is integrally formed with a securing part being curved at its end portion to encompass the end outer peripheral surface of the spindle guide.
- The spindle guide may be formed with at least one engagement step on its outer peripheral surface.
- The spindle guide may have a seating part circumferentially formed at an upper end portion of the spindle guide, the securing part of the outer pipe being seated in the seating part and the seating part being fixed to the securing part while being engaged with the securing part.
- Accordingly, the present invention has effects in that the inner and outer pipes are secured to each other by pressing themselves, so as to improve an installation performance, thereby enhancing production efficiency. Moreover, the spindle guide and the inner pipe maintain a parallel and intimately contacted state to uniformly accommodate the load transversely applied thereto, thereby increasing the durability of the device.
- In addition, according to the present invention, it has effects in that a tapered part is formed from the upper end portion of the outer pipe, which makes a good appearance when being mounted onto the chair or the chair base and then diversifies the chair design.
-
FIG. 1 a is a sectional view illustrating a construction of a conventional column unit; -
FIG. 1 b is a sectional view illustrating a case when a lateral force is applied to the column unit ofFIG. 1 a; -
FIG. 2 is a sectional view exemplifying the column unit of a conventional gas cylinder; -
FIG. 3 a is a sectional view illustrating a construction of an assembly of a column unit for a chair according to a first embodiment of the present invention; -
FIG. 3 b is a sectional view illustrating the assembly of the column unit for the chair in detail according to the first embodiment of the present invention; -
FIG. 4 a is a sectional view illustrating a construction of an assembly of a column unit for a chair having a long-type taper according to a second embodiment of the present invention; -
FIG. 4 b is a sectional view illustrating the construction of the assembly of the column unit for the chair shown inFIG. 4 a, in which a spindle assembly is removed; -
FIG. 4 c is a sectional view illustrating the construction of the assembly of the column unit for the chair shown inFIG. 4 b, in which a spindle guide is removed; -
FIG. 4 d is a sectional view illustrating an outer pipe which is a structural element of the assembly of the column unit for the chair shown inFIG. 4 a; -
FIG. 5 a is a sectional view illustrating a construction of an assembly of a column unit for a chair having an all-type taper according to a third embodiment of the present invention; -
FIG. 5 b is a sectional view illustrating the construction of the assembly of the column unit for the chair shown inFIG. 5 a, in which a spindle assembly is removed; -
FIG. 5 c is a sectional view illustrating the construction of the assembly of the column unit for the chair shown inFIG. 5 b, in which a spindle guide is removed; -
FIG. 5 d is a sectional view illustrating an outer pipe which is a structural element of the assembly of the column unit for the chair shown inFIG. 5 a, in which an upper end of the outer pipe is curled; -
FIG. 6 is a sectional view illustrating an inner pipe of the assembly of the column unit for the chair according to the embodiments of the present invention; -
FIG. 7 is a sectional view illustrating an outer pipe of the assembly of the column unit for the chair according to the embodiments of the present invention; -
FIG. 8 is a side view illustrating a spindle guide of the assembly of the column unit for the chair according to the embodiments of the present invention; -
FIG. 9 is a sectional view illustrating the spindle guide shown inFIG. 8 ; -
FIG. 10 a is a sectional view illustrating an assembly of a column unit for a chair according to a fourth embodiment of the present invention; -
FIG. 10 b is a partially enlarged view illustrating a portion ‘A’ ofFIG. 10 a; and -
FIG. 10 c is a partially enlarged view illustrating a securing part ofFIG. 10 a. - Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
- Referring to
FIG. 3 a, a column unit for a chair according to one embodiment of the present invention, like the prior art, may be applied to a gas cylinder having a gas open/close pin 8, atapered holder 8 a, avalve 8 b and apiston 5 a within aspindle assembly 2.Reference numerals - Meanwhile, as shown in
FIG. 3 b, the column unit for the chair includes anouter pipe 10, aninner pipe 20 and aspindle guide 30. - The
outer pipe 10, as shown inFIG. 4 d, may include aflat part 16 having a constant length, aninclined part 12 having a gradually increasing diameter toward its end portion, and a linear part H extending from theinclined part 12. Also a securingplate 11 to which an end portion of the piston rod 6 (referFIG. 3 a) is fixed is provided within theouter pipe 10. Aconcave engagement jaw 14 is formed along the inner peripheral surface of theouter pipe 10 at its upper end portion. Here, the upper end portion of theengagement jaw 14 forms abent portion 14 a (referFIG. 4 d), which serves to prevent theinner pipe 20 from being derailed. - Also, the length of the
inclined part 12 of theouter pipe 10 may be varied depending on a user's need. In other words, as shown inFIGS. 4 a to 4 d, it may be provided in the form a long-type taper having a liner part H on its upper end portion, or an all-type taper which is directly inclined from the upper end portion, excluding the linear part H as shown inFIGS. 5 a to 5 d. - The
inner pipe 20 is formed in a circular shape and provided with abent portion 21 which is vertically curved outward at its end portion. Thebent portion 21 is seated in theengagement jaw 14 of theouter pipe 10 when assembled. As shown inFIG. 6 , anengagement protrusion 22 is obliquely projected inward at the inner end portion of theinner pipe 20. In addition, a plurality of through holes h may be formed at the outer periphery of thebent portion 21. These through holes h serve as a kind of drainage during a painting process of the column unit, which prevents water from remaining in the column unit to prevent the column unit from being rusted. - Meanwhile, the
inner pipe 20 may be secured to theouter pipe 10 by being pressed against the outer surface of theouter pipe 10 in a state of being inserted within theouter pipe 10. At this point, the pressed area is illustrated as acompressed part 15. Aspace 13 is formed between theinclined part 12 of theouter pipe 10 and the outer surface of theinner pipe 20. - The
spindle guide 30 includes ahead portion 31 and abody portion 32 as shown inFIGS. 8 and 9 . Thehead portion 31 is formed with a mountingend 31 a to be extended outward, and the mountingend 31 a is installed in close contact with the end portions of theouter pipe 10 and theinner pipe 20. - Further, the
spindle guide 30 may be made from a synthetic resin through an injection molding and also provided with a plurality ofslits 35 to reduce its weight for decreasing manufacturing costs. Thebody portion 32 may be formed with a plurality of engagement recesses 33 at its end portion, which may be fixedly coupled with theengagement protrusions 22 of theinner pipe 20. - In other words, the
engagement protrusion 22 maintains an engagement state within the engagement recesses 33 of thespindle guide 30, so that thespindle guide 30 cannot be derailed outward when being inserted within theinner pipe 20. - In the column unit for the chair in accordance with one embodiment of the present invention as constructed above, the
spindle assembly 2 is inserted within thespindle guide 30. At this moment, the inner peripheral surface of thespindle guide 30 and the outer peripheral surface of thespindle assembly 2 maintain a parallel insertion state. Accordingly, even if a load is applied in a lateral direction, i.e., at 360° in any direction with respect to a vertical axis of the column unit, the load will be applied to the entire contact surface between thespindle guide 30 and thespindle assembly 2, which makes it possible to prevent generation of a load concentration in a local area. - The
inclined part 12 formed in theouter pipe 10 creates aspace 13 between theinner pipe 20 as a cavity to be inserted and seated at a central hole of a chair base, which can minimize loss of materials during a machining process thereof and can be secured to each other by being pressed, thereby improving a production efficiency. - According to the fourth embodiment of the present invention as shown in
FIG. 10 a, a substantially ‘Y’ shapedouter pipe 10 is provided, excluding aninner pipe 20. This embodiment has a construction in which aspindle guide 30 is directly installed within theouter pipe 10. At this point, a securing part 18 (referFIG. 10 c) in an inward curved shape (referFIG. 10 c) is formed in a peripheral direction at the end portion of theouter pipe 10, which prevents thespindle guide 30 from being moved upward. Further, anengagement step 19 is formed at the outer surface of thespindle guide 30, so that the lateral surface of thespindle guide 30 makes contact with theouter pipe 10 to fix the same, while the outer inclined surface of thespindle guide 30 is in contact with the inner surface of theouter pipe 10 to fix theouter pipe 10. Here, thespindle guide 30 can be coupled with theouter pipe 10 to form a cavity V therebetween. With constructions as such, it can be appreciated that the securingpart 18 of theouter pipe 10 is bent to be fixed to aseating part 18 a of thespindle guide 30 without a separate fixing tool. - According to the fourth embodiment of the present invention as described above, it can be noted that by excluding the
inner pipe 20 the construction of the device can be simplified, which makes it possible to decrease the manufacturing cost and improve the installation efficiency. - Although a preferred embodiment of the present invention has been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (9)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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KR10-2011-0040989 | 2011-04-29 | ||
KR20110040989 | 2011-04-29 | ||
PCT/KR2012/003187 WO2012148167A2 (en) | 2011-04-29 | 2012-04-25 | Column unit for chair |
Publications (1)
Publication Number | Publication Date |
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US20140145483A1 true US20140145483A1 (en) | 2014-05-29 |
Family
ID=47072900
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/113,028 Abandoned US20140145483A1 (en) | 2011-04-29 | 2012-04-25 | Column unit for chair |
Country Status (4)
Country | Link |
---|---|
US (1) | US20140145483A1 (en) |
CN (1) | CN103561612B (en) |
DE (1) | DE112012001922T5 (en) |
WO (1) | WO2012148167A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10487901B2 (en) | 2017-01-09 | 2019-11-26 | Beijingwest Industries Co., Ltd. | Damping strut |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105465258A (en) * | 2014-09-05 | 2016-04-06 | 亚德利塑胶工厂股份有限公司 | Air pressure rod |
CN106499765B (en) * | 2015-09-06 | 2019-05-10 | 青岛三弘精密器械有限公司 | Cylinder |
CN108397503B (en) * | 2017-02-06 | 2020-04-14 | 株式会社万都 | Improved shock absorber |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4899969A (en) * | 1988-01-28 | 1990-02-13 | Fritz Bauer And Sohne Ohg | Lockable elevating mechanism for the continuous adjustment of furniture and guide sleeve for such an elevating mechanism |
US4979718A (en) * | 1983-07-29 | 1990-12-25 | Suspa Compart Aktiengesellschaft | Lockable elevating mechanism for the continuous adjustment of seats, table tops or similar items of furniture |
US5377942A (en) * | 1990-10-31 | 1995-01-03 | Stabilus Gmbh | Column unit |
US5443573A (en) * | 1992-10-05 | 1995-08-22 | Stabilus Gmbh | Guide means for telescoping cylindrical parts and a column unit comprising such guide means |
US5497966A (en) * | 1992-04-11 | 1996-03-12 | Stabilus Gmbh | Column unit, in particular a chair column unit |
US5531413A (en) * | 1993-04-27 | 1996-07-02 | Suspa Compart Aktiengesellschaft | Adjustable-length column for chairs, tables or the like |
US5702083A (en) * | 1996-04-17 | 1997-12-30 | Lai; Shiang-Hwey | Pneumatic cylinder of a pneumatic lever-lift chair, and its assembly process |
US6402102B1 (en) * | 1999-03-18 | 2002-06-11 | Suspa Holding Gmbh | Adjustable length column for chairs and tables and length adjusting element therefor |
US6474619B1 (en) * | 2001-07-24 | 2002-11-05 | Samhongsa Co., Ltd. | Tube guide for a column unit |
US6866238B2 (en) * | 2002-06-18 | 2005-03-15 | Stabilus Gmbh | Furniture pillar |
US7059592B2 (en) * | 2002-12-31 | 2006-06-13 | Sam Hong Sa Co., Ltd. | Gas cylinder |
US7306192B2 (en) * | 2006-03-14 | 2007-12-11 | Stabilus Gmbh | Height-adjustable column |
US7673936B2 (en) * | 2007-10-25 | 2010-03-09 | Jung Yu Hsu | Adjustable bicycle seat assembly |
Family Cites Families (8)
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CN2206646Y (en) * | 1994-07-19 | 1995-09-06 | 嘉馥工业股份有限公司 | Health-care apparatus |
KR200226715Y1 (en) * | 2001-01-20 | 2001-06-15 | 주식회사삼홍사 | Column unit for chair |
EP1527714B1 (en) * | 2002-07-23 | 2008-11-26 | Okamura corporation | Chair |
CN1332846C (en) * | 2003-06-03 | 2007-08-22 | 捷安特(中国)有限公司 | Bicycle |
CN2734605Y (en) * | 2003-06-03 | 2005-10-19 | 捷安特(中国)有限公司 | Handlebar regulating device of bicycle |
KR200379956Y1 (en) * | 2004-12-16 | 2005-03-28 | 주식회사 삼홍사 | A gas cylinder |
KR100902182B1 (en) * | 2006-06-07 | 2009-06-10 | 주식회사 삼홍사 | A gas cylinder |
JP2011052732A (en) * | 2009-08-31 | 2011-03-17 | Hitachi Automotive Systems Ltd | Cylinder device |
-
2012
- 2012-04-25 DE DE112012001922.9T patent/DE112012001922T5/en not_active Ceased
- 2012-04-25 WO PCT/KR2012/003187 patent/WO2012148167A2/en active Application Filing
- 2012-04-25 CN CN201280021071.9A patent/CN103561612B/en active Active
- 2012-04-25 US US14/113,028 patent/US20140145483A1/en not_active Abandoned
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4979718A (en) * | 1983-07-29 | 1990-12-25 | Suspa Compart Aktiengesellschaft | Lockable elevating mechanism for the continuous adjustment of seats, table tops or similar items of furniture |
US4899969A (en) * | 1988-01-28 | 1990-02-13 | Fritz Bauer And Sohne Ohg | Lockable elevating mechanism for the continuous adjustment of furniture and guide sleeve for such an elevating mechanism |
US5377942A (en) * | 1990-10-31 | 1995-01-03 | Stabilus Gmbh | Column unit |
US5497966A (en) * | 1992-04-11 | 1996-03-12 | Stabilus Gmbh | Column unit, in particular a chair column unit |
US5443573A (en) * | 1992-10-05 | 1995-08-22 | Stabilus Gmbh | Guide means for telescoping cylindrical parts and a column unit comprising such guide means |
US5531413A (en) * | 1993-04-27 | 1996-07-02 | Suspa Compart Aktiengesellschaft | Adjustable-length column for chairs, tables or the like |
US5702083A (en) * | 1996-04-17 | 1997-12-30 | Lai; Shiang-Hwey | Pneumatic cylinder of a pneumatic lever-lift chair, and its assembly process |
US6402102B1 (en) * | 1999-03-18 | 2002-06-11 | Suspa Holding Gmbh | Adjustable length column for chairs and tables and length adjusting element therefor |
US6474619B1 (en) * | 2001-07-24 | 2002-11-05 | Samhongsa Co., Ltd. | Tube guide for a column unit |
US6866238B2 (en) * | 2002-06-18 | 2005-03-15 | Stabilus Gmbh | Furniture pillar |
US7059592B2 (en) * | 2002-12-31 | 2006-06-13 | Sam Hong Sa Co., Ltd. | Gas cylinder |
US7306192B2 (en) * | 2006-03-14 | 2007-12-11 | Stabilus Gmbh | Height-adjustable column |
US7673936B2 (en) * | 2007-10-25 | 2010-03-09 | Jung Yu Hsu | Adjustable bicycle seat assembly |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10487901B2 (en) | 2017-01-09 | 2019-11-26 | Beijingwest Industries Co., Ltd. | Damping strut |
Also Published As
Publication number | Publication date |
---|---|
WO2012148167A3 (en) | 2013-03-28 |
CN103561612B (en) | 2016-10-12 |
WO2012148167A2 (en) | 2012-11-01 |
DE112012001922T5 (en) | 2014-03-20 |
CN103561612A (en) | 2014-02-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SAMHONGSA CO., LTD., KOREA, DEMOCRATIC PEOPLE'S RE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, EUN HA;LEE, KI CHEOL;REEL/FRAME:031936/0307 Effective date: 20131111 |
|
AS | Assignment |
Owner name: SAMHONGSA CO., LTD., KOREA, REPUBLIC OF Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE COUNTRY OF THE ASSIGNEE PREVIOUSLY RECORDED AT REEL: 031936 FRAME: 0307. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNORS:KIM, EUN HA;LEE, KI CHEOL;REEL/FRAME:034307/0022 Effective date: 20131111 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |