WO2004027515A1 - Wall roll-up screen - Google Patents

Wall roll-up screen Download PDF

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Publication number
WO2004027515A1
WO2004027515A1 PCT/KR2003/001884 KR0301884W WO2004027515A1 WO 2004027515 A1 WO2004027515 A1 WO 2004027515A1 KR 0301884 W KR0301884 W KR 0301884W WO 2004027515 A1 WO2004027515 A1 WO 2004027515A1
Authority
WO
WIPO (PCT)
Prior art keywords
screen
magnets
rod
groove shaped
shaped rings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2003/001884
Other languages
French (fr)
Inventor
Hae-Yong Choi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB0503058A priority Critical patent/GB2408351B/en
Priority to AU2003263614A priority patent/AU2003263614A1/en
Priority to US10/525,801 priority patent/US7274509B2/en
Priority to JP2004538032A priority patent/JP4215720B2/en
Publication of WO2004027515A1 publication Critical patent/WO2004027515A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/40—Roller blinds
    • E06B9/42—Parts or details of roller blinds, e.g. suspension devices, blind boxes
    • 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
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
    • F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
    • F16M13/022—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle repositionable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof

Definitions

  • the present invention relates to a track type wall roll-up screen among portable screens for projection, and more particularly, to a wall roll-up screen wherein the screen can be used and portable with ease by attaching a magnet assembly to both sides of a lower rod of the screen.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide a wall roll-up screen among portable screens for projection, especially, a wall roll-up screen wherein the screen can be used and portable with ease by attaching a magnet assembly to both sides of a lower rod of the screen.
  • a wall roll-up screen wherein a screen is attached between upper and lower rods and the screen can be rolled up by the lower rod, wherein groove shaped rings processed with a magnetic material such as steel are attached on left and right ends of the upper rod of the screen and magnets is coupled on left and right ends of the lower rod of the screen, so that the screen is rolled up and then the magnets of the left and right of the lower rod are coupled with the groove shaped rings of the upper rod when the screen is carried, and the magnets and the groove shaped rings are separated when the screen is used.
  • the groove shaped rings have grooves where the magnet can be coupled with the inner part of the groove shaped rings.
  • attachment units are attached on the wall in the rear part of the upper and lower rods, and the attachment units are coupled with the upper and lower rods of the screen so that the screen is stably and fixedly attached to the wall.
  • the groove shaped rings of the upper rod and the magnets of the lower rod can be exchanged in their positions.
  • FIG. 1 is an explanatory view of a wall roll-up screen in the art
  • FIG. 2 is an explanatory view of an external shape of a screen in accordance with the present invention
  • FIG. 3 is an explanatory view of a magnet of a screen in accordance with the present invention
  • FIG. 4 is a detailed explanatory view of a magnet of a screen in accordance with the present invention.
  • FIG. 5 is an explanatory view of a magnet contact of a screen in accordance with the present invention.
  • FIG. 6 is an explanatory view of a screen of the present invention when the screen is applicably used
  • FIG. 7 is an explanatory view of a screen of the present invention when the screen is fixedly used with a stand; and
  • FIG. 8 is an explanatory view of a construction of a screen in accordance with the present invention when the screen is applicably used.
  • the screen of the present invention can be used and portable with ease by attaching a magnet assembly to both sides of a lower rod of the screen. When the screen is used, the lower rod 2 is separated from an upper rod 1 of the screen 3 to be extended.
  • the screen 3 is rolled up and the upper and lower rods 1 and 2 are attached each other so that it is convenient to carry the screen without any damage on the surface of the screen and there is no distortion of the upper and lower rods of the screen in the right and left directions.
  • the present invention has the upper and lower rods 1 and 2, and the screen 3 is attached between the rods 1 and 2 so that the lower rod 2 is rolled up when the screen is moved and the rod 2 is extended when the screen is used.
  • Groove shaped rings 4 are attached to right and left sides of the upper rod 1 , which is made of steel or the like responding to a magnetic property, and magnets 5 are attached on right and left ends of the lower rod 2. Such a construction may be changed, that is, the groove shaped rings 4 and the magnets 5 of the upper rod 1 and the groove shaped ring 4 may be exchanged in their positions.
  • a well known attachment unit 6 such as a rubber adsorption plate or a snap button which can be attached and separated easily may be coupled in the rear part of the upper rod 1 .
  • a groove shaped ring 4 is constructed in the rear part of the lower rod 2, which is separated from the lower rod 2, and there is an attachment unit 7 behind the lower rod 2.
  • a known screen support 8 can be coupled and used fixedly in answer to a need, and the screen 3 may be a projection screen of roll shape.
  • a support 9 forming an insertion unit 10 into which the lower rod 2 is inserted is constructed on both ends of the upper rod 1 , the groove shaped ring 4 formed of steel is constructed as a portion of a circle, and a handle 11 is constructed on both ends of the magnet of the lower rod 2.
  • the upper and lower rods 1 and 2 are extended when the screen is used, as shown in FIG. 2a. And, when the screen is portable and carried, the screen attached to the lower rod 2 is rolled up around the lower rod 2 and then the magnets 5 attached to the right and left ends of the lower rod 2 are attached to the groove shaped rings 4 formed of the steel which are attached to the right and left parts of the upper rod 1.
  • the screen of the present invention has an increased attachment effect by coupling the magnets 5 to the inner groove areas of the right and left parts of the upper rod 1.
  • groove shaped rings 4 and magnets 5 on both ends of the upper and lower rods 1 and 2 of the present invention should be of circle shapes since the upper and lower rods 1 and 2 should be adhered closely each other after the screen 3 is rolled up around the lower rod 2.
  • the coupling contact A becomes very small as shown in FIG. 5a so that the upper and lower rods 1 and 2 are easily separated with small force.
  • the coupling contact B is extended to the right and left parts of the magnets and to the front and rear parts of the groove shaped rings 4, the coupling forces of the magnets 5 and the groove shaped rings 4 can be strong.
  • the magnets 5 of the lower rod 2 which are coupled with the right and left ends of the groove shaped rings 4 are not twisted in the right and left directions, the extension of the screen in its right and left parts can be protected.
  • the lower rod 2 which is inserted into the insertion units 10 on both ends of the upper rod 1 has magnets 5 on its groove shaped rings 4 so that there is an effect that both rods do not apart from each other, and the screen 3 of the lower rod 2 is stably rolled up to be carried when the lower rod 2 is rolled up by turning the handle 11.
  • the groove shaped rings 4 are attached to the attachment units 6 behind the lower rod 2 and the magnets 5 of the lower rod 2 are attached to the coupling attachment units 7 which have been attached to the coupling wall rear already so that the screen is used as portable, home and conference screens.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Telephone Set Structure (AREA)

Abstract

The device relates to a wall roll-up screen of which the upper and the lower are attached with the upper short rod and the lower short rod, respectively, wherein the screen is constituted to be rolled up when not in use and to be unrolled when used, by the lower short rod; and the left and the right end of the upper short rod are mounted with steel structure of groove shaped ringscapable of coupling magnets and the left and the right end of the lower short rod are mounted with magnets to allow them to be coupled with the groove shaped rings of the left end and the right end of the upper short rod, upon rolling up the screen by the lower short rod and, if necessary, separating the magnets from the groove shape rings, thereby to obtain good portability and mobility of the screen, to prevent the screen from being twisted from side to side upon fixing the screen, and to improve aesthetic value of product.

Description

WALL ROLL-UP SCREEN TECHNICAL FIELD
The present invention relates to a track type wall roll-up screen among portable screens for projection, and more particularly, to a wall roll-up screen wherein the screen can be used and portable with ease by attaching a magnet assembly to both sides of a lower rod of the screen.
BACKGROUND ART
In a conventional wall roll-up screen as shown in FIG. 1 , it is necessary to roll up the screen 10 around a lower rod like a scroll and to tie the screen with string 11 so as to reserve it, and to untie the string 11 to use the screen 10. And, when a user wishes to carry the screen, the user has to tie it with the string 11 , which is troublesome. Especially, in this case, a surface of the screen where the string is tied has some wrinkles and edges of the screen can be loosish since the upper and lower rods are wrenched mutually. Besides the problems described above, the beauty of product is deteriorated in appearance.
DISCLOSURE OF INVENTION
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a wall roll-up screen among portable screens for projection, especially, a wall roll-up screen wherein the screen can be used and portable with ease by attaching a magnet assembly to both sides of a lower rod of the screen. According to the present invention for achieving the object, there is provided a wall roll-up screen wherein a screen is attached between upper and lower rods and the screen can be rolled up by the lower rod, wherein groove shaped rings processed with a magnetic material such as steel are attached on left and right ends of the upper rod of the screen and magnets is coupled on left and right ends of the lower rod of the screen, so that the screen is rolled up and then the magnets of the left and right of the lower rod are coupled with the groove shaped rings of the upper rod when the screen is carried, and the magnets and the groove shaped rings are separated when the screen is used. Preferably, the groove shaped rings have grooves where the magnet can be coupled with the inner part of the groove shaped rings.
Preferably, separate attachment units are attached on the wall in the rear part of the upper and lower rods, and the attachment units are coupled with the upper and lower rods of the screen so that the screen is stably and fixedly attached to the wall.
Preferably, the groove shaped rings of the upper rod and the magnets of the lower rod can be exchanged in their positions. BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects and features of the present invention will become apparent the following description of preferred embodiment of given in conjunction with the accompanying drawings, in which:
FIG. 1 is an explanatory view of a wall roll-up screen in the art; FIG. 2 is an explanatory view of an external shape of a screen in accordance with the present invention; FIG. 3 is an explanatory view of a magnet of a screen in accordance with the present invention;
FIG. 4 is a detailed explanatory view of a magnet of a screen in accordance with the present invention;
FIG. 5 is an explanatory view of a magnet contact of a screen in accordance with the present invention;
FIG. 6 is an explanatory view of a screen of the present invention when the screen is applicably used;
FIG. 7 is an explanatory view of a screen of the present invention when the screen is fixedly used with a stand; and FIG. 8 is an explanatory view of a construction of a screen in accordance with the present invention when the screen is applicably used.
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set fourth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, like numbers refer to like elements throughout the specification. The screen of the present invention can be used and portable with ease by attaching a magnet assembly to both sides of a lower rod of the screen. When the screen is used, the lower rod 2 is separated from an upper rod 1 of the screen 3 to be extended. And, when the screen is carried, the screen 3 is rolled up and the upper and lower rods 1 and 2 are attached each other so that it is convenient to carry the screen without any damage on the surface of the screen and there is no distortion of the upper and lower rods of the screen in the right and left directions.
Referring to FIGS. 2 and 3, the present invention has the upper and lower rods 1 and 2, and the screen 3 is attached between the rods 1 and 2 so that the lower rod 2 is rolled up when the screen is moved and the rod 2 is extended when the screen is used.
Groove shaped rings 4 are attached to right and left sides of the upper rod 1 , which is made of steel or the like responding to a magnetic property, and magnets 5 are attached on right and left ends of the lower rod 2. Such a construction may be changed, that is, the groove shaped rings 4 and the magnets 5 of the upper rod 1 and the groove shaped ring 4 may be exchanged in their positions.
As shown in FIG. 6, a well known attachment unit 6 such as a rubber adsorption plate or a snap button which can be attached and separated easily may be coupled in the rear part of the upper rod 1 . And, a groove shaped ring 4 is constructed in the rear part of the lower rod 2, which is separated from the lower rod 2, and there is an attachment unit 7 behind the lower rod 2.
There exist grooves into which magnets having L or U shape can be inserted in the middle of the groove shaped rings 4.
Referring to FIG. 7, a known screen support 8 can be coupled and used fixedly in answer to a need, and the screen 3 may be a projection screen of roll shape.
Referring to FIG. 8, a support 9 forming an insertion unit 10 into which the lower rod 2 is inserted is constructed on both ends of the upper rod 1 , the groove shaped ring 4 formed of steel is constructed as a portion of a circle, and a handle 11 is constructed on both ends of the magnet of the lower rod 2. The upper and lower rods 1 and 2 are extended when the screen is used, as shown in FIG. 2a. And, when the screen is portable and carried, the screen attached to the lower rod 2 is rolled up around the lower rod 2 and then the magnets 5 attached to the right and left ends of the lower rod 2 are attached to the groove shaped rings 4 formed of the steel which are attached to the right and left parts of the upper rod 1.
Referring to FIG. 4, the screen of the present invention has an increased attachment effect by coupling the magnets 5 to the inner groove areas of the right and left parts of the upper rod 1.
That is, as shown in FIG. 5, groove shaped rings 4 and magnets 5 on both ends of the upper and lower rods 1 and 2 of the present invention should be of circle shapes since the upper and lower rods 1 and 2 should be adhered closely each other after the screen 3 is rolled up around the lower rod 2.
In case that the grooves 4 and magnets 5 on both ends of the upper and lower rods 1 and 2 are formed of circle shape only, the coupling contact A becomes very small as shown in FIG. 5a so that the upper and lower rods 1 and 2 are easily separated with small force. However, in case that there are grooves in the groove shaped rings 4 which can be coupled with the magnets 5 as shown in the present invention, since the coupling contact B is extended to the right and left parts of the magnets and to the front and rear parts of the groove shaped rings 4, the coupling forces of the magnets 5 and the groove shaped rings 4 can be strong. Additionally, since the magnets 5 of the lower rod 2 which are coupled with the right and left ends of the groove shaped rings 4 are not twisted in the right and left directions, the extension of the screen in its right and left parts can be protected.
Also, as shown in FIG. 6, since the screen of the present invention is conveniently installed on the wall when the attachment unit 6 is coupled with the rear part of the upper rod 1 and the upper rod is coupled with the lower rod by the magnets 5 when the lower rod 2 is rolled up, there is no damage on the screen at all.
Also, as shown in FIG. 8, the lower rod 2 which is inserted into the insertion units 10 on both ends of the upper rod 1 has magnets 5 on its groove shaped rings 4 so that there is an effect that both rods do not apart from each other, and the screen 3 of the lower rod 2 is stably rolled up to be carried when the lower rod 2 is rolled up by turning the handle 11.
INDUSTRIAL APPLICABILITY
In accordance with the present invention, it is convenient to roll up a screen itself of a front screen or a projection screen or to extend it, to maintain its beauty of appearance without tying the screen with string, to attach it to a wall or a ceil simply, to fix it in order that the screen 3 is not shaken, and to carry it stably since upper and lower rods 1 and 2 are not twisted.
When the screen of the present invention is used, the groove shaped rings 4 are attached to the attachment units 6 behind the lower rod 2 and the magnets 5 of the lower rod 2 are attached to the coupling attachment units 7 which have been attached to the coupling wall rear already so that the screen is used as portable, home and conference screens.

Claims

What is claimed is: 1. A wall roll-up screen wherein a screen is attached between upper and lower rods and the screen can be rolled up by the lower rod, wherein groove shaped rings processed with a magnetic material such as steel are attached on left and right ends of the upper rod of the screen and magnets is coupled on left and right ends of the lower rod of the screen, so that the screen is rolled up and then the magnets of the left and right of the lower rod are coupled with the groove shaped rings of the upper rod when the screen is carried, and the magnets and the groove shaped rings are separated when the screen is used.
2. The screen according to claim 1 , wherein the groove shaped rings have grooves where the magnets can be coupled with the inner part of the groove shaped rings.
3. The screen according to claim 1 , wherein separate attachment units are attached on the wall in the rear part of the upper and lower rods, and the attachment units are coupled with the upper and lower rods of the screen so that the screen is stably and fixedly attached to the wall.
4. The screen according to claim 1 , wherein the groove shaped rings of the upper rod and the magnets of the lower rod can be exchanged in their positions.
PCT/KR2003/001884 2002-09-18 2003-09-15 Wall roll-up screen Ceased WO2004027515A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB0503058A GB2408351B (en) 2002-09-18 2003-09-15 Wall roll-up screen
AU2003263614A AU2003263614A1 (en) 2002-09-18 2003-09-15 Wall roll-up screen
US10/525,801 US7274509B2 (en) 2002-09-18 2003-09-15 Wall roll-up screen
JP2004538032A JP4215720B2 (en) 2002-09-18 2003-09-15 Wall-mounted screen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20-2002-0028755 2002-09-18
KR2020020028755U KR200298928Y1 (en) 2002-09-18 2002-09-18 Wall roll-up screen

Publications (1)

Publication Number Publication Date
WO2004027515A1 true WO2004027515A1 (en) 2004-04-01

Family

ID=32026018

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2003/001884 Ceased WO2004027515A1 (en) 2002-09-18 2003-09-15 Wall roll-up screen

Country Status (7)

Country Link
US (1) US7274509B2 (en)
JP (1) JP4215720B2 (en)
KR (1) KR200298928Y1 (en)
CN (1) CN100407047C (en)
AU (1) AU2003263614A1 (en)
GB (1) GB2408351B (en)
WO (1) WO2004027515A1 (en)

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WO2013160573A1 (en) 2012-04-27 2013-10-31 Miggiano Robert Retractable projection screen

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US7901214B1 (en) * 2007-01-06 2011-03-08 Liebowitz Michael J Portable drawing system
KR100857183B1 (en) 2007-08-09 2008-09-05 김병두 Winding rod deflection suppression device using a magnet.
CA2751763A1 (en) * 2008-03-12 2009-09-17 Zipboard, Inc. Portable retractable erasable writing surface
JP5233870B2 (en) * 2009-06-26 2013-07-10 株式会社オーエスエム Magnet screen
CN102243429A (en) * 2011-06-16 2011-11-16 中国科学院福建物质结构研究所 Portable screen of micro projector
KR101491083B1 (en) * 2014-09-19 2015-02-23 최정민 Roll screen
KR200479383Y1 (en) * 2014-10-13 2016-01-21 최정민 Roll screen
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US10729224B2 (en) * 2016-03-18 2020-08-04 Sphark, LLC Personal grooming drape
CN106527032B (en) * 2016-12-12 2018-07-17 广州市雄云视听设备有限公司 A kind of electronic last volume projection screen
US10321789B2 (en) 2016-12-12 2019-06-18 Moen Incorporated Magnetic shower curtain system
CN107390466A (en) * 2017-07-28 2017-11-24 安徽聚合自动化工程有限公司 A kind of dust-proof height-adjustable projecting apparatus
KR200494276Y1 (en) * 2021-04-30 2021-09-08 엠에스원디지털(주) A screen apparatus for beam project

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JPH11142974A (en) * 1997-09-05 1999-05-28 Izumi Kk Portable screen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013160573A1 (en) 2012-04-27 2013-10-31 Miggiano Robert Retractable projection screen
US9329468B2 (en) 2012-04-27 2016-05-03 Robert Miggiano Retractable projection screen

Also Published As

Publication number Publication date
CN100407047C (en) 2008-07-30
US20050243416A1 (en) 2005-11-03
GB0503058D0 (en) 2005-03-23
AU2003263614A1 (en) 2004-04-08
CN1678955A (en) 2005-10-05
GB2408351B (en) 2005-12-14
GB2408351A (en) 2005-05-25
US7274509B2 (en) 2007-09-25
JP2005539272A (en) 2005-12-22
KR200298928Y1 (en) 2002-12-31
JP4215720B2 (en) 2009-01-28

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