WO2021080223A1 - Dispositif d'écran enroulable à fonction de prévention des plis - Google Patents

Dispositif d'écran enroulable à fonction de prévention des plis Download PDF

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Publication number
WO2021080223A1
WO2021080223A1 PCT/KR2020/013792 KR2020013792W WO2021080223A1 WO 2021080223 A1 WO2021080223 A1 WO 2021080223A1 KR 2020013792 W KR2020013792 W KR 2020013792W WO 2021080223 A1 WO2021080223 A1 WO 2021080223A1
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WO
WIPO (PCT)
Prior art keywords
screen
tension
fabric
screen fabric
roll
Prior art date
Application number
PCT/KR2020/013792
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English (en)
Korean (ko)
Inventor
최중선
Original Assignee
최중선
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 최중선 filed Critical 최중선
Priority to PCT/KR2020/013792 priority Critical patent/WO2021080223A1/fr
Publication of WO2021080223A1 publication Critical patent/WO2021080223A1/fr

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    • 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

Definitions

  • the present invention relates to a roll screen device having an anti-wrinkle function, and more particularly, to a roll screen device having a method of spreading the screen fabric while moving downward or upward and having a wrinkle-preventing function.
  • the roll screen device is a device that plays a role of a display that clearly illuminates an image projected by a projector or a projector.
  • the roll screen device is generally configured to be unfolded while lowering or rising while being accommodated in a housing mounted on a ceiling or wall.
  • the lowering and unfolding roll screen device has a housing 10 extended to a predetermined length and one side is open, a winding roll 20 mounted inside the housing 10 to rotate forward and backward, and , It consists of a screen 30 that is wound on the winding roll 20 and unfolded or wound along the rotational direction of the winding roll 20.
  • the lower end of the screen 30 is configured to further include a rod-shaped tension holding member 31 having a predetermined weight in order to maintain a tight tension with respect to the screen 30 when deployed.
  • the present invention was conceived to solve the problems of the prior art, and an object of the present invention is to prevent wrinkles from occurring on the screen while spreading by raising or lowering the screen fabric to prevent screen distortion. It is to provide a roll screen device having a function.
  • a base portion on which a winding roll on which the screen fabric is wound is rotatably installed;
  • a screen upper connection part to which the upper end of the screen fabric is connected
  • An upper tension maintaining unit is connected between the vicinity of the upper end of the screen fabric and the upper connection portion of the screen.
  • the upper tension maintaining unit is characterized in that it comprises a first connection hole formed in the vicinity of both ends in the left and right width direction of the screen fabric and a first tension member connected between both sides of the upper connection portion of the screen.
  • the upper tension maintaining unit The upper tension maintaining unit,
  • a moving piece installed on the screen fabric and having a screw hole formed on an outer surface thereof;
  • a first connection support extending downward is formed at the upper connection portion of the screen, and the transfer screw passes through the first connection support and is screwed to the moving piece.
  • the upper tension holding unit is characterized in that it comprises a second tension member erected and installed by connecting a plurality of second connection holes formed to be spaced apart from each other along the left and right width directions of the screen fabric and the upper connection part of the screen, respectively. .
  • An installation groove is formed at a lower portion of the upper connection portion of the screen, and a first hook is formed by bending upward from a partial edge forming an entrance of the installation groove, and an upper end of the second tension member is caught by the first hook. It characterized in that it is configured.
  • the screen upper connection part includes a first cover member disposed in front of the screen fabric, extending downward, and having a second hook formed to be bent upward on a rear surface, and an upper end of the second tension member is the second The hook is hooked and the lower end is hooked to the second connection hole of the screen fabric.
  • An insertion piece is formed at an upper end of the first cover member, and an insertion groove is formed in a lower portion of the upper connection portion of the screen so that the insertion piece is inserted.
  • the upper tension holding unit is a slide member disposed to be movable along a guide rail groove extending along a left and right width direction at a lower portion of the upper connection portion of the screen, and each of the slide members is caught in the second connection hole. It characterized in that the third hook is formed to be bent upward so as to be.
  • a housing extending in a horizontal direction to a predetermined length and having an opening formed therein;
  • a winding roll rotatably installed in the housing
  • a lower tension maintaining unit is connected between the vicinity of the lower end of the screen fabric and the lower connection portion of the screen screen.
  • the lower tension holding unit is characterized in that it comprises a third connection hole formed in the vicinity of both ends in the left and right width direction of the screen fabric and a fourth tension member respectively connected between both sides of the lower connection portion of the screen.
  • the lower tension maintaining unit The lower tension maintaining unit
  • a moving piece installed on the screen fabric and having a screw hole formed on an outer surface thereof;
  • the lower tension maintaining unit is characterized in that it comprises a fourth connection hole formed to be spaced apart from each other along the left and right width direction of the screen fabric and a fifth tension member connecting the lower end of the screen connection.
  • a rod member extending in the horizontal direction of the screen fabric
  • It includes a second cover member extending upward of the rod member and disposed in front of the screen fabric, and having a fourth hook formed to be bent downward on the rear surface thereof,
  • One end of the fourth tension member is connected to the side of the second cover member, and one end of the fifth tension member is connected by being hooked on the fourth hook.
  • the lower tension maintaining unit further includes a fifth tension member connecting a fourth connection hole formed to be spaced apart from each other in a plurality of left and right width directions of the screen fabric, and a fifth tension member connecting the bottom connection part of the screen,
  • the screen lower connection portion is formed with a rod member extending in the left and right width direction of the screen fabric, and a fourth hook extending upward of the rod member and disposed in front of the screen fabric and formed to be bent downward on the rear surface. It includes a second cover member,
  • the transfer screw is connected through a second connection support installed on the second cover member and a moving piece installed on the screen fabric, and one end of the fifth tension member is hooked and connected to the fourth hook.
  • the base portion on which the winding roll on which the screen fabric is wound is rotatably installed;
  • a screen upper connection part to which the upper end of the screen fabric is connected;
  • it is configured to include an expansion holding unit for maintaining the expansion force when the screen fabric is unfolded, but the upper tension maintenance unit is connected between the upper portion of the screen fabric and the upper connection portion of the screen, so that the vicinity of the upper ends of both sides of the screen fabric Since it is kept taut, it is possible to reliably remove wrinkles in the longitudinal direction, and thus there is an effect that screen distortion does not occur.
  • the upper tension holding unit further includes a second tension member connecting a second connection hole formed to be spaced apart from each other in a plurality of left and right width directions of the screen fabric, and a second tension member connecting the upper connection portion of the screen.
  • the tension holding unit includes a moving piece installed on the screen fabric and having a screw hole formed on the outer surface, and a transfer screw that is screwed to the screw hole through a second connection support extended to the top connection portion of the screen and rotates. Therefore, even when it becomes loose due to long-term use, the tension of the screen fabric can be finely adjusted, so that the screen fabric can always be kept taut.
  • the cover member is disposed on the screen fabric, it is possible to cover the tension member, and a hook is formed on the back of the cover member to connect one end of the tension member, so that it is easy to assemble and use .
  • the cover member when an insertion piece is formed at an upper end of the cover member and an insertion groove is formed in a lower portion of the screen upper connection part so that the insertion piece is inserted, the cover member is connected to the screen upper connection part through the insertion piece and the insertion groove. Can be freely combined or separated against.
  • FIG. 1 is a perspective view showing a roll screen device according to the prior art.
  • FIG. 2 is a front view showing the roll screen device according to the first embodiment of the present invention.
  • FIG 3 is a rear view showing a roll screen device according to a first embodiment of the present invention.
  • FIG 4 is an enlarged top perspective view showing the roll screen device according to the first embodiment of the present invention.
  • FIG. 5 is a side cross-sectional view showing a roll screen device according to a first embodiment of the present invention.
  • FIG. 6 is a front view showing a roll screen device according to a second embodiment of the present invention.
  • FIG. 7 is a rear view showing a roll screen device according to a second embodiment of the present invention.
  • FIG 8 is a partially enlarged rear view according to the second embodiment of the present invention.
  • FIG. 9 is a rear view showing a roll screen device according to a third embodiment of the present invention.
  • FIG. 10 is a partially enlarged front cross-sectional perspective view of the roll screen device according to the third embodiment of the present invention.
  • FIG. 11 is a rear view of a roll screen device according to a fourth embodiment of the present invention.
  • FIG. 12 is a partially enlarged front cross-sectional perspective view of the roll screen device according to the fourth embodiment of the present invention.
  • FIG. 13 is a rear view of a roll screen device according to a fifth embodiment of the present invention.
  • 14A is a partially enlarged front cross-sectional perspective view of the roll screen device according to the fifth embodiment of the present invention.
  • FIG 14B is another partially enlarged front cross-sectional perspective view of the roll screen device according to the fifth embodiment of the present invention.
  • FIG. 15 is a rear view showing a roll screen device according to a sixth embodiment of the present invention.
  • FIG. 16 is a partially enlarged front cross-sectional perspective view of the roll screen device according to the sixth embodiment of the present invention.
  • FIG 17 is a front perspective view showing a roll screen device according to a seventh embodiment of the present invention.
  • FIG. 18 is an enlarged rear perspective view showing a roll screen device according to a seventh embodiment of the present invention.
  • the roll screen device 1000 As shown in Figures 2 to 5, the roll screen device 1000 according to the first embodiment of the present invention, the base portion 300 on which the winding roll 200 on which the screen fabric 100 is wound is rotatably installed. ), a screen upper connection part 500 to which the upper end of the screen fabric 100 is connected, the upper part is connected to the screen upper connection part 500, and the lower part is connected to the base part 300, and is erected to be stretchable in the vertical direction. It is configured to include an expansion and contraction unit 400 to be installed, and an expansion maintenance unit for maintaining the expansion force when the screen fabric 100 is unfolded.
  • the elastic part 400 is preferably made of an articulated link assembly 410, but an antenna-type elastic member may be adopted.
  • the roll screen apparatus 1000 may include an expansion holding unit (not shown) for restoring the expansion and contraction unit 400 to always automatically open upward.
  • the expansion holding unit is an electric motor 600, and a compression spring connected between the link assembly 410 and the base unit 300 Or it may be made of a pressure cylinder or the like.
  • the expansion holding unit may be composed of an electric motor 600 and a spring and a wire built into the articulated link assembly 410 to prevent interference with surrounding components.
  • the expansion holding unit may be composed of an electric motor 600 and a torsion spring installed at a joint portion of the articulated link assembly 410.
  • an electric motor 600 and a pneumatic cylinder or a hydraulic cylinder may be applied as the extension holding unit.
  • the link assembly 410 is composed of a plurality of links 411 connected to each other via a joint 412, so that at least two sets of the roll screen device 1000 are operated independently from each other when viewed from the front. Can be placed.
  • the roll screen device 1000 may manually expand and contract the stretching part 400.
  • a spiral spring is interlocked with the winding roll 200 so that a force to rotate in a direction in which the screen fabric 100 always descends, and between the elastic part 400 and the base 100,
  • the expansion holding unit consists of a spiral spring and a lift cylinder.
  • the screen fabric 100 connected to the screen upper connection part 500 is spread while rising together, and is stopped at the position by the lift cylinder in a state raised to a predetermined height. You lose.
  • the upper connection part 500 of the screen can be pulled down as it is, and in this case, the screen fabric 100 is naturally wound around the winding roll 200 by the spiral spring.
  • expansion holding units of various configurations may be adopted.
  • expansion holding unit may be connected between the upper screen connection part 500 and the base part 300.
  • the upper tension maintaining unit 700 is connected between the vicinity of the upper end of the screen fabric 100 and the upper connection portion 500 of the screen.
  • the upper tension holding unit 700 is a first tensioning unit connected between a first connection hole 120 formed near both ends of the screen fabric 100 in the left and right width directions and both sides of the screen upper connection part 500 Includes member 710.
  • the first tension member 710 may be connected between the vicinity of upper ends of both sides of the screen fabric 100 and the upper screen connection part 500.
  • the first tension member 710 may be composed of an illustrated tension spring or an elastic hook, and a tension spring and an elastic hook may be installed together.
  • first tension member 710 may be inserted into a fitting groove (not shown) formed on the side of the top connection part 500 of the screen to limit vertical movement.
  • a first reinforcing member 110 is installed near upper ends of both sides of the screen fabric 100, and a first end of the first tension member 710 is connected to the front of the first reinforcing member 110
  • the connection hole 120 may be formed.
  • the first reinforcing member 110 a metal piece, synthetic resin piece, or wood piece that is not arbitrarily deformed may be adopted.
  • the first reinforcing member 110 is firmly adhered or attached to the screen fabric 100 to prevent the portion where the first reinforcing member 110 is installed from being wrinkled or deformed.
  • the first reinforcing member 110 installed on the screen fabric 100 prevents the screen fabric 100 from being applied. It can fundamentally block the occurrence of localized wrinkles.
  • a support 540 extending downward is formed in the upper screen connection part 500, and one end of the first tension member 710 is first reinforced. It is preferable that it is connected to the member 110 and the other end of the first tension member 710 is connected to the support 540.
  • the support 540 is formed to be slightly inclined with respect to the screen fabric 100 so that the first tension member 710 is in a direction parallel to the screen fabric 100. It is desirable to make it tension.
  • the first tension member 710 is preferably installed to be spaced apart from each other in the vertical direction to prevent concentration of the load, but even if only one is installed, the effect of preventing local wrinkles can be obtained.
  • the vicinity of the lower ends of both sides of the screen fabric 100 and the winding roll 200 may be connected by a second tension member 610.
  • the second tension member 610 and the upper tension maintaining unit 700 keep the upper and lower ends of the screen fabric 100 in tension, it is possible to form a screen surface that does not cause wrinkles as a whole.
  • connection hole 130 is formed by drilling near the lower ends of both sides of the screen fabric 100, and locking rings 250 are formed on the circumferential surface or both ends of the winding roll 200 to form the connection hole 130. Both ends of the second tension member 610 may be connected between the and the locking ring 250.
  • 6 to 8 illustrate the configuration of the roll screen apparatus 1000 according to the second embodiment of the present invention, and redundant descriptions of the same configuration as those of the first embodiment will be omitted.
  • the upper tension maintaining unit 700 is installed on the screen fabric 100 and the moving piece 770 having a screw hole 771 formed on the outer surface thereof, and the screen upper connection part 500 Consists of including a transfer screw 780 screwed to the screw hole 771
  • a first connection support 550 extending downward is formed at the upper connection part 500 of the screen, and the transfer screw 780 passes through the first connection support 550 and is attached to the moving piece 770. Can be screwed.
  • the transfer screw 780 when the transfer screw 780 is installed on the first connection support 550 and rotates in place while being screwed to the screw hole 771, it moves through the screw hole 771 As the piece 770 moves in the transverse direction, the screen fabric 100 may be kept taut.
  • the transfer screw 780 and the screw hole 771 are formed in a state spaced apart in the vertical direction, and it is preferable to perform fine adjustment according to the position.
  • the moving piece 770 may be firmly fixed to the second reinforcing member 190 attached or bonded to the screen fabric 100.
  • the second reinforcing member 190 a metal piece, a synthetic resin piece, or a wood piece that is not arbitrarily deformed may be adopted.
  • the second reinforcing member 190 may prevent the portion of the screen fabric 100 on which the moving piece 770 is installed from being wrinkled or deformed.
  • the tension of the screen fabric 100 can be finely and accurately adjusted, so that the screen fabric 100 is always ) Can be kept taut and wrinkles can be prevented from occurring due to an asymmetric tension occurring on the left and right sides of the screen fabric 100.
  • the vicinity of the lower ends of both sides of the screen fabric 100 and the winding roll 200 may be connected by a second tension member 610.
  • the upper tension maintaining unit 700 is between the first connection holes 120 formed near both ends in the left and right width direction of the screen fabric 100 and both sides of the upper screen connection part 500. It includes a first tension member 710 to be connected respectively. Since this structure is the same as or similar to the first embodiment, referring to FIGS. 3 to 5, a detailed description thereof will be omitted.
  • the first tension member 710 may be inserted into a fitting groove (not shown) formed on the side of the upper connection part 500 of the screen to limit vertical movement.
  • the upper tension maintaining unit 700 is erected by connecting a plurality of second connection holes 140 and the upper screen connection part 500 formed to be spaced apart from each other along the left and right width direction of the screen fabric 100. It further includes a second tension member 720 to be installed.
  • the upper end of the second tension member 720 may be configured to be hooked on the first hook 510 formed to be bent upward under the screen upper connection part 500.
  • the installation groove 520 is formed under the screen upper connection part 500, and the first hook 510 is formed by bending upward from the edge forming the entrance of the installation groove 520. have.
  • first hook 510 may be formed to protrude directly from the lower end of the upper screen connection part 500.
  • the upper screen connection part 500 may include a cover member 550 disposed in front of the screen fabric 100 and extending downward to cover the second tension member 720 so that the second tension member 720 is not visible.
  • the cover member 550 may be integrally formed with the screen upper connection part 500 or may be formed to be detachable.
  • first tension member 710 may be connected to the side portions of the first connection hole 120 and the cover member 550, respectively.
  • the cover member 550 may be attached to the screen upper connection part 500 using an appropriate adhesive.
  • a tension spring or an elastic hook may be adopted, and a tension spring and an elastic hook may be installed together.
  • connection holes 130 formed near the lower ends of both sides of the screen fabric 100 and the winding roll 200 may be connected by a third tension member 610. I can.
  • a tension spring or an elastic hook may be adopted, and a tension spring and an elastic hook may be installed together.
  • both sides of the upper end of the screen fabric 100 are stretched in the left and right width direction, and at the same time, the width direction portion of the upper end is stretched in the vertical direction, and the lower end of the screen fabric 100 is pulled to the left and right. It is possible to reliably prevent transverse and longitudinal wrinkles.
  • the upper tension maintaining unit 700 is between the first connection holes 120 formed near both ends in the left and right width direction of the screen fabric 100 and both sides of the upper screen connection part 500. It includes a first tension member 710 to be connected respectively. Since this structure is the same as or similar to the first embodiment, a detailed description thereof will be omitted.
  • the upper tension holding unit 700 adopts the configuration of the second embodiment.
  • the upper tension maintaining unit 700 is a second connecting hole 140 formed to be spaced apart from each other along the left and right width directions of the screen fabric 100 and a second connecting portion 500 at the top of the screen. It includes a tension member 720.
  • the screen upper connection part 500 is disposed in front of the screen fabric 100, extends downward, and includes a first cover member 560 having a second hook 561 formed to be bent upward on the rear surface. Including, the upper end of the second tension member 720 can be configured to be caught in the second hook 561 and the lower end of the second tension member 720 to be caught in the second connection hole 140 of the screen fabric.
  • the first cover member 560 and the screen upper connection part 500 may be properly coupled with an adhesive by a fastening member.
  • connection holes 130 formed near the lower ends of both sides of the screen fabric 100 and the winding roll 200 may be connected by a third tension member 610. I can.
  • a tension spring or an elastic hook may be adopted, and a tension spring and an elastic hook may be installed together.
  • both sides of the upper end of the screen fabric 100 are stretched in the left and right width direction, and at the same time, the width direction portion of the upper end is stretched in the vertical direction, and the lower end of the screen fabric 100 is pulled to the left and right. It is possible to reliably prevent transverse and longitudinal wrinkles.
  • FIG. 13 and 14 illustrate the configuration of the roll screen apparatus 1000 according to the fifth embodiment of the present invention, and redundant descriptions of the same configurations as those of the first and second embodiments will be omitted.
  • the upper tension maintaining unit 700 is between the first connection holes 120 formed near both ends in the left and right width direction of the screen fabric 100 and both sides of the upper screen connection part 500. It includes a first tension member 710 to be connected respectively. Since this structure is the same as or similar to the first embodiment, a detailed description thereof will be omitted.
  • the upper tension holding unit 700 adopts the configuration of the second embodiment.
  • the upper tension maintaining unit 700 is a second connecting hole 140 formed to be spaced apart from each other along the left and right width directions of the screen fabric 100 and a second connecting portion 500 at the top of the screen. It includes a tension member 720.
  • the screen upper connection part 500 is disposed in front of the screen fabric 100, extends downward, and includes a first cover member 560 having a second hook 561 formed to be bent upward on the rear surface. Including, the upper end of the second tension member 720 can be configured to be caught in the second hook 561 and the lower end of the second tension member 720 to be caught in the second connection hole 140 of the screen fabric.
  • an insertion piece 567 is formed at an upper end of the first cover member 560, and an insertion groove ( 571) can be formed.
  • the first cover member 560 may be freely coupled to or separated from the screen upper connection part 500 through the insertion piece 567 and the insertion groove 571.
  • the vicinity of the lower ends of both sides of the screen fabric 100 and the winding roll 200 may be connected by a second tension member 610.
  • a tension spring or an elastic hook may be adopted, and a tension spring and an elastic hook may be installed together.
  • both sides of the upper end of the screen fabric 100 are stretched in the left and right width direction, and at the same time, the width direction portion of the upper end is stretched in the vertical direction, and the lower end of the screen fabric 100 is pulled to the left and right. It is possible to reliably prevent transverse and longitudinal wrinkles.
  • the upper tension maintaining unit 700 is between the first connection holes 120 formed near both ends in the left and right width direction of the screen fabric 100 and both sides of the upper screen connection part 500. It includes a first tension member 710 to be connected respectively. Since this structure is the same as or similar to the first embodiment, a detailed description thereof will be omitted.
  • the upper tension holding unit 700 adopts the configuration of the second embodiment.
  • the upper tension holding unit 700 is a slive member disposed to be movable along a guide rail groove 580 extending along the left and right width directions below the screen upper connection part 500 ( 590).
  • a guide rail groove 580 is formed to extend in the left and right width direction below the screen upper connection part 500, and the plurality of slide members 590 are movable in the guide rail groove 580. It is disposed, and each of the slide member 590 may be formed with a third hook 591 that is bent upward so as to be caught in the second connection hole 140, respectively.
  • the screen upper connection part 500 may include a cover member 530 disposed in front of the screen fabric 100 and extending downward to cover the slide member 590 so that the slide member 590 is not visible.
  • the vicinity of the lower ends of both sides of the screen fabric 100 and the winding roll 200 may be connected by a second tension member 610.
  • a tension spring or an elastic hook may be adopted, and a tension spring and an elastic hook may be installed together.
  • both sides of the upper end of the screen fabric 100 are stretched in the left and right width direction, and at the same time, the width direction portion of the upper end is stretched in the vertical direction, and the lower end of the screen fabric 100 is pulled to the left and right. It is possible to reliably prevent transverse and longitudinal wrinkles.
  • Embodiment 7 of the present invention targets a descending roll screen device 1000'.
  • the roll screen device 1000 ′ includes a housing 300 ′ extending horizontally to a predetermined length and having an opening formed therein, and a winding roll 200 ′ rotatably installed in the housing 300 ′. ), a screen fabric 100 that is connected to the winding roll 200 ′ and is unfolded or wound while passing through the opening according to the forward and reverse rotation of the winding roll, and is installed to extend in a horizontal direction at the lower end of the screen fabric 100 It is configured to include a lower screen connection portion 800, and the lower tension maintaining unit 900 is connected between the lower portion of the screen fabric 100 and the lower screen connection portion 800.
  • the lower tension maintaining unit 900 includes a third connection hole 150 formed near both ends in the left and right width direction of the screen fabric 100 and a fourth tension connected between both sides of the screen lower connection part 800. Includes member 740.
  • the lower tension maintaining unit 900 a moving piece (not shown) installed on the screen fabric 100 and having a screw hole (not shown) formed on the outer surface (not shown), and the screen It may be configured to include a transfer screw (not shown) screwed to the screw hole through the lower connection portion 500 ′.
  • the lower tension maintaining unit 900 is built in the fourth connection hole 160 and the screen lower connection part 800 formed in a plurality of spaced apart from each other along the left and right width direction in the vicinity of the lower portion of the screen fabric 100. It may include a fifth tension member 750 to be connected to the bottom.
  • the screen lower connection part 800 includes a rod member 810 extending in the horizontal direction of the screen fabric 100 and a rod member 810 extending upward from the rod member 810 and in front of the screen fabric 100. And a second cover member 820 having a fourth hook 821 disposed on the rear surface and bent downward.
  • one end of the fourth tension member 740 may be connected to the side of the second cover member 820, and one end of the fifth tension member 750 may be connected by being hooked on the fourth hook 821. .
  • both sides of the lower end of the screen fabric 100 are stretched in the left and right width direction, and at the same time, the width direction portion of the lower end is stretched in the vertical direction, thereby reliably preventing the transverse and longitudinal wrinkles of the screen fabric 100.
  • a tension spring or an elastic hook may be adopted, and as shown, a tension spring and an elastic hook may be installed together.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

La présente invention concerne un dispositif d'écran enroulable à fonction de prévention des plis, le dispositif comprenant : une partie socle dans laquelle est disposé de façon rotative un rouleau d'enroulement, autour duquel est enroulé une toile d'écran, ; une partie de raccordement d'extrémité supérieure d'écran à laquelle est reliée l'extrémité supérieure de la toile d'écran ; une partie extensible dont l'extrémité supérieure est reliée à la partie de raccordement d'extrémité supérieure d'écran et l'extrémité inférieure est reliée à la partie socle, et qui est agencée à la verticale de façon à être extensible dans la direction verticale ; et une unité de maintien d'extension pour maintenir l'extensibilité lorsque la toile d'écran est déroulée, une unité de maintien en tension supérieure reliant la partie proche de l'extrémité supérieure de la toile d'écran et la partie de raccordement d'extrémité supérieure d'écran de telle sorte que les parties proches des extrémités supérieures des deux côtés de la toile d'écran sont maintenues tendues, ce qui fait que, de façon générale, on n'observe pas de formation de plis, avec pour résultat d'éviter la déformation de l'écran.
PCT/KR2020/013792 2019-10-21 2020-10-08 Dispositif d'écran enroulable à fonction de prévention des plis WO2021080223A1 (fr)

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PCT/KR2020/013792 WO2021080223A1 (fr) 2019-10-21 2020-10-08 Dispositif d'écran enroulable à fonction de prévention des plis

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KR10-2020-0005025 2019-10-21
KR20-2019-0004246 2019-10-21
PCT/KR2020/013792 WO2021080223A1 (fr) 2019-10-21 2020-10-08 Dispositif d'écran enroulable à fonction de prévention des plis

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113623507A (zh) * 2021-08-13 2021-11-09 江苏舜合物联网科技有限公司 一种卷曲幕布升降装置
WO2024029687A1 (fr) * 2022-08-01 2024-02-08 삼성전자주식회사 Dispositif d'affichage

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