KR200484861Y1 - Roll screen apparatus with foreign materials removing function - Google Patents

Roll screen apparatus with foreign materials removing function Download PDF

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Publication number
KR200484861Y1
KR200484861Y1 KR2020170001322U KR20170001322U KR200484861Y1 KR 200484861 Y1 KR200484861 Y1 KR 200484861Y1 KR 2020170001322 U KR2020170001322 U KR 2020170001322U KR 20170001322 U KR20170001322 U KR 20170001322U KR 200484861 Y1 KR200484861 Y1 KR 200484861Y1
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KR
South Korea
Prior art keywords
screen
mohair
main body
fitting
housing
Prior art date
Application number
KR2020170001322U
Other languages
Korean (ko)
Inventor
박승수
Original Assignee
주식회사 일화테크
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
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Priority to KR2020170001322U priority Critical patent/KR200484861Y1/en
Application granted granted Critical
Publication of KR200484861Y1 publication Critical patent/KR200484861Y1/en

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    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Abstract

A roll screen device having a foreign substance removing function, the roll screen device comprising: a screen housing having an outlet at one side; A roller rotatably housed in the screen housing; A screen main body coupled to the rollers in a wound state and wound around the rollers according to a rotation direction of the rollers or being pulled out from the rollers while being pulled out to the outlets of the screen housings; A driving motor for providing rotational force to the roller; A control unit for controlling the operation of the driving motor and controlling the length of the storage and retrieval of the screen body; And a foreign matter removing unit provided on the screen housing to remove foreign substances from the surface of the screen body while closely adhering to the screen body.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a roll screen apparatus having a foreign matter removing function,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll screen apparatus having a foreign object removing function, and more particularly to a roll screen apparatus for displaying an image by a projector or a projector.

Generally, an image is projected on a roll-screen device to display an image by a projector or a projector.

A conventional rolling screen apparatus is configured such that a screen main body is detachably housed in a housing fixed to a ceiling or a wall surface of a room. In use, the screen main body is unfolded from the housing and spread.

In other words, the conventional roll screen device is raised and lowered while the screen main body moves in and out through the opening formed in the housing.

Here, the screen device has a problem that foreign substances such as dust existing in the room are attached to the surface of the screen body, and foreign substances attached to the surface of the screen body are drawn into the inside of the housing together when the screen body is housed inside the housing Occurs.

When the foreign substances repeatedly enter the interior of the housing as described above, not only the screen body is contaminated, but also the components inside the housing are contaminated and cause a trouble.

Korean Patent Registration No. 10-1288337, which is a prior art document, discloses a portable terminal having a housing extending in a predetermined length and having an opening formed at one side thereof; A winding roller rotatably installed inside the housing; A screen connected to the winding roller and opened or wound while passing through the opening according to forward and reverse rotation of the winding roller; A sag preventing unit that is provided at a lower side of the housing and that constitutes a pressing member that moves linearly toward the lower end in the circumferential direction of the winding roller and a pressing force transmitting member that intermittently supports the pressing member to move up and down; And a control switch for operating the deflection preventing means.

However, the above-described prior art lacks a structure for removing foreign matter adhering to the surface of the screen, which causes a foreign matter to be drawn into the interior of the housing.

Therefore, a technique for solving the above-described problems is required.

On the other hand, the background technology described above is the technical information acquired by the inventor for the purpose of deriving the design, or acquired during the derivation of the design, and is not necessarily a known technology disclosed to the general public before the application of the design .

The embodiments disclosed herein are aimed at providing a roll-screen apparatus having a foreign object removing function capable of preventing foreign substances from entering the inside of a screen housing by removing foreign substances such as dust adhering to the surface of the screen body have.

According to an embodiment of the present invention, there is provided a rolling screen apparatus having a foreign substance removing function, comprising: a screen housing having a draw-out port at one side; A roller rotatably housed in the screen housing; A screen main body coupled to the rollers in a wound state and wound around the rollers according to a rotation direction of the rollers or being pulled out from the rollers while being pulled out to the outlets of the screen housings; A driving motor for providing rotational force to the roller; A control unit for controlling the operation of the driving motor and controlling the length of the storage and retrieval of the screen body; And a foreign matter removing unit provided on the screen housing to remove foreign substances from the surface of the screen body while closely adhering to the screen body.

For example, the foreign substance removing unit may include a fitting slot having a fitting space formed at an inner side of the screen housing along the longitudinal direction and having an opening formed at one side thereof; A mohair bracket projecting from the opening of the fitting slot while being detachably fitted in the fitting space of the fitting slot and extending toward the screen body; And a mohair which is fixed to the front end of the mohair bracket and closely contacts the screen body.

Meanwhile, the control unit may control either one of a pull-in signal for storing the screen main body through a wireless or wired line, a pull-out signal for pulling out the screen main body, and a part of the pull-out signal for pulling out a part of the screen main body A communication unit for receiving a signal; And a motor operation unit for operating the drive motor according to a control signal applied to the communication unit.

According to the above-mentioned problem solving means, since the mohair constituting the foreign substance removing portion is closely attached to the screen main body through the fitting slot and the mohair bracket, the foreign substances adhered to the surface of the screen main body when the screen main body moves up and down can be easily removed by the mohair A roll-screen device may be presented.

In addition, since the mohair can be vertically coupled to the screen main body while the mohair moves up and down when the screen main body moves up and down, the mohair can be prevented from interfering with the vertical movement of the screen main body A roll-screen device may be presented.

In addition, when the additional structure having the same configuration as the fitting slot and the mohair bracket and the mohair is provided in a symmetrical state, it is possible to provide a roll-screen apparatus capable of removing foreign matter adhered to the surface of the screen body have.

In addition, when the screen main body is formed with a 16:12 aspect ratio because the screen main body is drawn out entirely or partially drawn by the motor operation part constituting the control part, the aspect ratio of the screen main body A roll screen device capable of easily switching to a 4: 3 screen or a 16: 9 screen can be presented.

The effects obtained in the disclosed embodiments are not limited to the effects mentioned above, and other effects not mentioned are obvious to those skilled in the art to which the embodiments disclosed from the following description belong It can be understood.

1 is an exploded perspective view illustrating a roll screen device having a function of removing foreign materials according to an exemplary embodiment of the present invention.
FIG. 2 is a front view showing a roll screen device having a foreign matter removing function according to an embodiment.
3 is a longitudinal sectional view showing a roll screen apparatus having a function of removing foreign matter according to an embodiment.
Fig. 4 is an enlarged partial view showing a part of Fig. 3; Fig.
5 is a block diagram illustrating a control unit of a roll screen apparatus having a foreign substance removing function according to an exemplary embodiment of the present invention.
6 is a longitudinal sectional view showing another embodiment of the foreign matter removing unit shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the design in the drawings, portions not related to the description have been omitted, and portions having high relevance throughout the specification have been given similar reference numerals.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.

Various embodiments are described in detail below with reference to the accompanying drawings. The embodiments described below may be modified and implemented in various different forms. In order to more clearly describe the features of the embodiments, detailed descriptions of known matters to those skilled in the art are omitted. In the drawings, parts not relating to the description of the embodiments are omitted, and like parts are denoted by similar reference numerals throughout the specification.

Throughout the specification, when a configuration is referred to as being "connected" to another configuration, it includes not only a case of being directly connected, but also a case of being connected with another configuration in between. In addition, when a configuration is referred to as "including ", it means that other configurations may be included, as well as other configurations, as long as there is no specially contradicted description.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

1 and 2, the roll screen device according to an embodiment of the present invention includes a screen housing 100, a roller 200, a screen body 300, a driving motor 400, A control unit 500 and a foreign substance removing unit 600. [

The screen housing 100 provides a storage space for the screen main body 300 and is fixed to an upper portion of a ceiling or a wall surface. The screen housing 100 is formed in a hollow shape having an outlet at a lower end thereof, and is formed to be long in a horizontal direction.

The screen housing 100 may be formed in a rectangular shape as shown in FIG. 1, or may be formed in a cylindrical shape or a polygonal shape. In addition, the screen housing 100 may have the same fixing member for fixing to the wall surface, and the fixing member may be separately formed.

The roller 200 is a component that draws or draws the screen main body 300 through the forward rotation or the reverse rotation while the screen main body 300 is wound while being rotatably housed in the screen housing 100.

2, the roller 200 is cylindrical and has one end rotatably installed in the screen housing 100 through a bearing 210 and the other end coupled to the driving motor 400, (Not shown).

The screen main body 300 is connected to an upper end of the roller 200 and is housed in the screen housing 100 while being wound around the roller 200. The screen main body 300 is unrolled from the roller 200 and is led out to the outlet 110 of the screen housing 100 So that the image is projected.

The screen main body 300 is provided with a weight bar 310 that provides gravity at the lower end thereof and can ascend and descend while maintaining a flat surface.

2, the screen body 300 may have a ratio of 16: 12, that is, 4: 3, as shown in FIG. 2. The full width of the screen body 300 may be drawn by the operation of a driving motor 400 It is possible to provide a screen of 4: 3 in the horizontal and vertical directions or a screen of 16: 9 in the horizontal and vertical directions while only a part of the screen is taken out.

The driving motor 400 is a component for elevating and lowering the screen main body 300 while applying a rotational force to the roller 200 to rotate forward or reverse.

Specifically, the driving motor 400 is operated by the control of the control unit 500, which will be described later, and the screen main body 300 is lifted and stored in the screen housing 100, or the screen main body 300 is lowered .

The driving motor 300 may be a motor capable of controlling the drawing length of the screen main body 300 while the rotational speed thereof is controlled and a motor capable of adjusting the drawing length of the screen main body 300 may be used have. In addition, the driving motor 300 satisfies any configuration as far as it can control the drawing length of the screen main body 300.

The control unit 500 is a component for controlling the operation of the driving motor 300, and may be configured to include the communication unit 510 and the motor operation unit 530, as shown in FIG.

The communication unit 510 receives a control signal from a user and may be configured in the form of a wired or wireless remote controller. The communication unit 510 may include a Bluetooth module, an NFC tag module, or an RF tag module. .

Specifically, the communication unit 510 includes a pull-in signal for pulling the screen body 300 into the screen housing 100, a pull-out signal for pulling out the entire screen body 300 from the screen housing 100, 300 may be applied to the motor operation unit 530 by receiving a control signal of a part of the pull-out signal for pulling out only a part of the signal from the screen housing 100.

The motor operation unit 530 operates the drive motor 400 according to a control signal applied from the communication unit 510 to move the screen main body 300 up and down. When the control signal is an incoming signal, When the control signal is a pull-out signal, the entire screen body 300 is lowered to provide a 4: 3 screen. When the control signal is a part of a control signal, only a part of the screen main body 300 is taken out, Screen.

At this time, the motor operation unit 530 can control the drawing speed of the screen main body 300 differently by controlling the rotation speed of the driving motor 400 differently or controlling the operation time differently.

Therefore, the screen main body 300 can be easily switched to the aspect ratio of 4: 3 or 16: 9, if necessary.

The foreign substance removing unit 600 is a component for removing foreign matter such as dust adhering to the surface of the ascending and descending screen main body 300. The scouring housing 100 And is adhered to the surface of the screen main body 300, thereby removing the foreign substances when the screen main body 300 is lifted or lowered.

The foreign material removing unit 600 may include, for example, a fitting slot 610, a mohair bracket 620 and a mohair 630 as shown in FIG.

The fitting slot 610 is provided along the longitudinal direction on the inner wall surface of the screen housing 100 to form a fitting space having an opening 611 at one side thereof to provide a joining portion of the mohair bracket 620 described later.

The mohair bracket 620 is a member that is releasably fitted along the fitting slot 610 to provide a fixed portion of the mohair 630. Specifically, the mohair bracket 620 may include the fitting portion 621, the neck portion 622, and the mohair fixing portion 623 as shown in FIG.

The fitting portion 621 is formed in a shape corresponding to the fitting space of the fitting slot 610 and is engaged with the fitting slot 610.

The neck portion 622 protrudes from the opening of the fitting slot 610 and extends toward the screen body 300 while forming the same body as the fitting portion 621. The neck portion 622 may be manufactured to have different lengths depending on the winding amount and the thickness of the screen main body 300.

The mohair fixing portion 623 is formed integrally at the tip of the neck portion 622 to provide a fixing portion of the mohair 630.

The mohair 630 is in close contact with the screen main body 300 in a state of being fixed to the mohair fixing part 623 constituting the mohair bracket 620. When the screen main body 300 moves up and down, Remove foreign matter while sticking in sweeping form.

As is known, the mohair 630 is a conventional member for blocking a gap between a door and a window, and is made of a bristle of animal hair or synthetic resin in a strip shape.

4, the fitting space is formed in a circular shape and the fitting portion 621 of the mohair bracket 620 is formed in a circular shape so that the mohair bracket 620 can be rotated Lt; / RTI >

The fitting slot 610 is formed in a state in which the end of the opening 611 is spaced apart from the neck 622 of the mohair bracket 620 so that the upward and downward flow of the neck 622 due to the rotation of the fitting portion 621 . ≪ / RTI >

Accordingly, the mohair 630 is brought into close contact with the surface of the screen main body 300 while vertically flowing as the screen main body 300 moves up and down.

Here, when the mohair 630 does not flow, the screen main body 300 may interfere with the mohair 630 during the ascending / descending movement, and smooth up and down can not be achieved. However, since the mohair 630 moves upward and downward while the screen main body 300 moves up and down, the screen main body 300 can be smoothly lifted and removed by the mohair 630.

Meanwhile, in the fitting slot 610, the elastic pad 612 may be provided at the end of the opening 611 as shown in FIG.

The elastic pad 612 is made of a material having elasticity such as a rubber material and is integrally fixed to the end of the opening 611. The elastic pad 612 is integrally fixed to the end of the opening 611. When the mohair bracket 620 is moved up and down by the lifting and lowering of the screen body 300, (622).

The foreign substance removing unit 600 of the present invention may further include an additional fitting slot 610 ', an additional mohair bracket 620' and an additional mohair 630 'as shown in FIG. 6 .

That is, the additional fitting slot 610 ', the additional mohair bracket 620' and the additional mohair 630 'have the same configuration as the fitting slot 610, the mohair bracket 620 and the mohair 630 described above, And is adhered to the back surface of the screen main body 300, so that the foreign substances adhering to the back surface of the screen main body 300 can be removed.

Accordingly, the screen main body 300 can be removed by the mohair 630 and the additional mohair 630 ', respectively.

Here, it is preferable that the additional mohair 630 'is provided with a step with the mohair 630 as shown in FIG.

If the additional mohair 630 'and the mohair 630 are provided symmetrically with each other at the same height without a step difference, interference occurs during the lifting and lowering of the screen main body 300. The additional mohair 630' The foreign substances can be smoothly removed without interfering with the ascending and descending of the screen main body 300. As shown in FIG.

The operation and operation of the roll screen device having the foreign substance removing function according to one embodiment of the present invention including the above-described components will be described.

The user controls the drive motor 400 through the control unit 500 to take out the screen main body 300 from the screen housing 100. When the screen main body 300 is used, .

The control unit 500 provides the control signal to the motor operation unit 530 according to the type of the user's control signal applied to the communication unit 510, In the case of the lead-out signal, the entire screen main body 300 is lowered to provide a 4: 3 screen, and when the control signal is a part of the screen, only a part of the screen main body 300 is taken out to provide a 16: 9 screen.

Meanwhile, the mohair 630 is in close contact with the screen main body 300 and moves up and down according to the ascending and descending of the screen main body 300, thereby removing foreign matter adhering to the surface of the screen main body 300.

As described above, the roll screen device having the foreign substance removing function according to the embodiment of the present invention is configured such that the mohair 630 constituting the foreign substance removing unit 600 is inserted into the screen body 300 through the fitting slot 610 and the mohair bracket 620, Foreign substances adhering to the surface of the screen main body 300 can be easily removed by the mohair 630 when the screen main body 300 is lifted and lowered and the screen main body 300 can be easily removed The screen main body 300 can be easily switched to a 4: 3 screen or a 16: 9 screen since the whole is drawn out or only a part is drawn out by the motor operating part 530. [

The term " part " used in the above embodiments means a hardware component such as a software or a field programmable gate array (FPGA) or an ASIC, and the 'part' performs certain roles. However, 'part' is not meant to be limited to software or hardware. &Quot; to " may be configured to reside on an addressable storage medium and may be configured to play one or more processors. Thus, by way of example, 'parts' may refer to components such as software components, object-oriented software components, class components and task components, and processes, functions, , Subroutines, segments of program patent code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables.

The functions provided within the components and components may be combined with a smaller number of components and components or separated from additional components and components.

It will be apparent to those skilled in the art that the above-described embodiments are for illustrative purposes only and that those skilled in the art will readily understand that other embodiments can be readily modified without departing from the spirit or essential characteristics of the embodiments described above You will understand. It is therefore to be understood that the above-described embodiments are to be considered in all respects only as illustrative and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope to be protected by the present specification is defined by the claims of utility model registration described below rather than the above detailed description and includes all changes or modifications derived from the meaning and scope of the utility model registration claim and equivalents thereof .

100: Screen housing 110: Outlet
200: roller 210: bearing
300: Screen body 310: Weight bar
400: drive motor
500: control unit 510: communication unit
530: motor operation part
600: Foreign material removal
610: insertion slot 611: opening
620: mohair bracket 621:
622: neck portion 623: mohair fixing portion
630: mohair

Claims (7)

A screen housing having an outlet at one side;
A roller rotatably housed in the screen housing;
A screen main body coupled to the rollers in a wound state and wound around the rollers according to a rotation direction of the rollers or being pulled out from the rollers while being pulled out to the outlets of the screen housings;
A driving motor for providing rotational force to the roller;
A control unit for controlling the operation of the driving motor and controlling the length of the storage and retrieval of the screen body; And
And a foreign matter removing unit provided on the screen housing to remove foreign substances from the surface of the screen body while closely adhering to the screen body,
The foreign-
A fitting slot having a fitting space formed in the longitudinal direction of the inside of the screen housing and having an opening formed at one side thereof;
A mohair bracket projecting from the opening of the fitting slot while being detachably fitted in the fitting space of the fitting slot and extending toward the screen body; And
And a mohair fixed to the front end of the mohair bracket and brought into close contact with the screen body,
The mohair bracket includes:
A fitting portion formed in a shape corresponding to a fitting space of the fitting slot;
A neck portion protruding from an opening of the fitting slot, the neck portion being identical with the fitting portion; And
And a mohair fixing part formed at a distal end of the neck part to provide a joining part of the mohair,
The fitting slot
Wherein the fitting space in which the fitting portion is fitted is formed in a circular shape to receive the fitting portion in a rotatable state and the end portion of the opening portion is formed apart from the neck portion so that the neck portion and the mohair Allowing the up and down flow of the fixed part,
The mohair,
The upper surface of the screen main body and the upper surface of the screen main body,
The fitting slot
And an elastic pad provided at an end of the opening and adapted to cushion an impact while facing the neck portion when the moire fixing portion is vertically moved.
delete delete delete The method according to claim 1,
The foreign-
An additional fitting slot formed in the longitudinal direction of the inside of the screen housing while being in symmetry with the fitting slot and facing the back surface of the screen body;
An additional mohair bracket having the same structure as the mohair bracket and extending toward the back surface of the screen body while being fitted in the additional fitting slot; And
And an additional mohair fixed to a front end of the additional mohair bracket and closely attached to a back surface of the screen main body.
The method according to claim 1,
Wherein,
A communication unit for receiving any one of a pull-in signal for receiving the screen body through wireless or wire, a pull-out signal for pulling out the screen body, and a pull-out signal for pulling out a part of the screen body; And
And a motor operating unit for operating the driving motor according to a control signal applied to the communication unit.
The method of claim 6,
The screen main body,
The ratio of the width to the length is formed at a ratio of 16:12,
Wherein,
When the control signal applied to the shaking-signal determining unit is a pull-out signal, the entire screen body is taken out through the motor operating unit,
When the control signal applied to the signal discrimination unit is a part of a control signal, only a part of the screen main body is taken out through the motor operation unit, A roll screen device having a foreign substance removing function.
KR2020170001322U 2017-03-21 2017-03-21 Roll screen apparatus with foreign materials removing function KR200484861Y1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102180949B1 (en) * 2020-06-08 2020-11-19 비아이랜드주식회사 Roll screen type artificial turf
KR20210028498A (en) * 2019-09-04 2021-03-12 주식회사 대상테크롤 Screen Apparatus having Automatic Cleaning Function

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63153833U (en) * 1987-03-31 1988-10-07
KR101323676B1 (en) * 2012-04-24 2013-10-31 (주)대영시스템 Lower end bar of roll screen having the cushion function, the lower end bar cap and roll screen using these
KR101476928B1 (en) * 2013-09-10 2014-12-24 구명화 Screen projection covergence type living room furniture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63153833U (en) * 1987-03-31 1988-10-07
KR101323676B1 (en) * 2012-04-24 2013-10-31 (주)대영시스템 Lower end bar of roll screen having the cushion function, the lower end bar cap and roll screen using these
KR101476928B1 (en) * 2013-09-10 2014-12-24 구명화 Screen projection covergence type living room furniture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210028498A (en) * 2019-09-04 2021-03-12 주식회사 대상테크롤 Screen Apparatus having Automatic Cleaning Function
KR102303858B1 (en) 2019-09-04 2021-09-23 주식회사 대상테크롤 Screen Apparatus having Automatic Cleaning Function
KR102180949B1 (en) * 2020-06-08 2020-11-19 비아이랜드주식회사 Roll screen type artificial turf

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