US3186475A - Window shade assembly - Google Patents

Window shade assembly Download PDF

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Publication number
US3186475A
US3186475A US132353A US13235361A US3186475A US 3186475 A US3186475 A US 3186475A US 132353 A US132353 A US 132353A US 13235361 A US13235361 A US 13235361A US 3186475 A US3186475 A US 3186475A
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Prior art keywords
roller
plug
diameter
end wall
hub
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Expired - Lifetime
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US132353A
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Lawrence S Wilcoxon
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Clopay Corp
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Clopay Corp
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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
    • E06B9/44—Rollers therefor; Fastening roller blinds to rollers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/904—Fastener or fastener element composed of nonmetallic material
    • Y10S411/908—Resinous material

Definitions

  • the primary objective of this invention has been to provide inexpensive means for varying the lengths of tubular rollers so that the number of stock sizes required for a complete retailers' inventory-can be drastically reduced.
  • an inexpensive expansible adaptor plug which receives the gudgeon pin of the window shade roller.
  • this adaptor plug is molded of semi-resilient plastic material. It is adjustable axially within the tubular roller and it is easilyexpanded into locking engagement with the internal surface of the roller in any adjustable position. In my invention; this expansion is accomplished 1 by utilizing the gudgeon pin as the expander. That is, the adaptor plug is fitted into the end of the tube to a pointwhere the overall length is as required. Thereafter, the gudgeon pin is forced into a tapered bore within the plug which expands the plug to lock it securely in place within the tube.
  • this plug fills in the gaps between the various lengths of tubes which may be carried in a reasonably sized inventory.
  • the method of cutting disclosed here may be employed in conjunction with the adaptor plug; because, as will be seen, the adaptor plug takes the placed the usual end cap in which the gudgeon pin has been mounted in the past.
  • this arrangement of the elements accomplishes the objectives of reducing inventories, minimizing the number of elements necessary to provide an adjustable window shade assembly, reducing cost to a minimum, and it provides the purchaser with a simple means of length adjustment.
  • FIGURE 1 is a front elevational view of the roller shade assembly.
  • FIGURE 2 is a front elevational view of the roller shade being cut to size.
  • FIGURE 3 is a front elevation of the roller shade being separated after having been cut to size.
  • FIGURE 4 is a transverse cross sectional view taken along the line 44 of FIGURE 1.
  • FIGURE 5 is a longitudinal cross sectional view of the adaptor plug.
  • FIGURE 6 is a front elevation of the gudgeori pin.
  • FIGURE 7 is an end view of a modified form of plug.
  • FIGURE 8 is a cross sectional view of the plug of FIGURE 7.
  • Theroller shade assembly designated '1 comprises a tubular steel roller 2 having a shade 4 rolled thereon. This shade may be made of plastic, fabric or other appropriate materials. Mounted in one end of the tubular steel roller 2 is a conventional spring motor 6 such as that shown in Patent No. 2,586,340. Extending from the opposite end of the roller is an adaptor plug 8 from which extends one end 10 of a gudgeon pin 12.
  • a stock size window shade may be reduced in length by simultaneously cutting the window shade and tubular roller by means of a rotary steel diso cutter blade 14.
  • the rotarysteel disc cutter is passed through the shade 4 and on into the tubular roller 2 while the roller is rotated by mechanical means including a mandrel 16.
  • the roller is shortened to size as shown in FIGURE 3. This cutting operation may take place in the retail store so that it is not necessary to supply an unlimited number of stock sizes to the retail store.
  • the open end of the roller is closed by means of the adaptor plug 8.
  • the adaptor plug 8 is preferably made of a polyethylene material of one piece construction.
  • the plug comprises a circular end portion or wall 18 from the periphery of which extends a cylindrical barrel 20 having .an inwardly tapered end 22.
  • On the periphery of the flange Tare two shoulders 24 and 26 which serve to locate the wardly tapered hub portion 28.
  • a tapered aperture 30 passes through the radially extending portion 18 of the adaptor plug and the inwardly tapered hub portion 28.
  • Four equally spaced ribs 34 extend radially from the hub portion-28 to the interior surface of the cylindrical barrel 20.
  • a groove 36 which extends from the end of the flange to the first shoulder 24. As may be seen in FIGURE 4, when the adaptor plug is inserted, the groove 36 fits over the lock seam of the tubular steel roller, thus keying the plug in place and preventing rotation.
  • a gudgeon pin "12 fits into the annular aperture 30 of the adaptor plug and serves to expand the adaptor plug into tight engagement with the internal surface of the tubular steel roller.
  • the gudgeon pin is cylindrical in shape and has a point 38 at one end. As shown, the outside diameter of the pin 12 is substantially equal to the outer end of the aperture or opening 30, but the opening tapers inwardly such that the inner end thereof is substantially smaller than the outside diameter of the pin.
  • Adjacent the opposite end of the gudgeon pin is a radially extending flange 40 which abuts against the end of the adaptor plug and serves to locate the gudgeon pin therein.
  • the aperture 30 of the adaptor plug tapers inwardly, the hub 28, the ribs 34, and cylin dri-cal barrel 20 will be expanded radially upon insertion ing it in place. ,of the plug, the outer ends of the ,ribs are tapered as area,
  • the adaptor plug may be inserted into the tubular roller up to the shoulder 24 and then expanded into engagement 24 and in this position can be locked by the gudgeon pin 12.
  • the modification of the plug illustrated in FIGURES 7 and 8 omits the cylindrical barrel 20 at the outer ends of the radial ribs 34.
  • the outer surfaces of I the ribs, indicated by the numeral 41 make contact with the inner surface of the tubular roller and when the plug is expanded by insertion of the gudgeon pin, the surfaces are tightly pressed into engagement with the roller, lock- To assist in making the initial insertion On the other shown at 42.
  • the modified form of plug may be adjusted lock it in place, just as in the preferred embodiment.
  • a shade roller assembly having a tubular metal roller with a shade rolled thereon and a spring motor at one end thereof, the improvement to facilitate the adjustment of the overall length .ofthe assembly comprising,
  • said plug being an integral molding of semi-resilient plastic material having the characteristics of polyethylene, said plug having a circular end wall at the outer end thereof that is sufiiciently larger in diameter than a the inside diameter of said roller to prevent insertion of the plug into said roller beyond said end wall,
  • a cylindrical gudgeon pin having a pointed endreceivable in the opening in said hub, a plurality of radially disposed ribs. interconnecting said barrel in said hub,
  • a shade roller assembly having a tubular metal roller with a shade rolled thereon and a spring motor at One end thereof, the improvement to facilitate the adjustment of the overall length of the assembly comprising,
  • said plug being an integral molding of semi-resilient plastic material having the characteristics of polyethylene, said plug having a circular end wall at the outer end thereof that is sufficiently larger in diameter than the ⁇ inside diameter of said roller to preventinser-tion of the plug into said roller beyond said end Wall, 7
  • an inwardly tapering hub portion extending from the inner face of said end wall the axis of which is concentric to the central axis of said end wall, said hub portion'having an inwardly tapering central opening therein-that opens through said end wall,
  • a plug and pin assembly for mounting in a hollow end of a shade roller comprising a plastic plug and a pin, said plug having an end Wall, a plurality of radial vanes extending from said end wall and substantially normal thereto and an axially extending opening through said plug converging from said end wall along the inner edges of said vanes, and said pin having a shank of uniform crosssecti-on and a pointed end, Whereby'insertion of said pin expands the vanes into gripping engagement with the hollow end of a shaderoller.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Description

June 1, 1965 1.. s. wlLcoxou 3,136,475
WINDOW SHADE ASSEMBLY Filed Aug. 18, 1961 INV EN TOR. W4 Wm United States Patent This invention relates to window shades and, more particularly, to a window shade of the type which utilizes a tubular roller, such as one made from steel.
A problem which has confronted manufacturers and retailers of window shades of this type for a longtime has-been that of providing window shades in the infinite number of lengths required in order to fit all windows.
This problem is especially acute whe'rra window shade is to be replaced, because in this situation the window shade mount brackets are already in place and their spacing" determines the length of the window shade roller to be employed. Window shades utilizing wooden rollers are no particular problem, because they may be cut to size using an ordinary hand saw. Tubular steel is much more difiicult, and it requires special tools and know-how in order to cut it neatly and accurately. Retailers of steel roller Window shades have had to install special cutting tools, but the cutting has taken a considerable amount of time on the part of a specially trained-clerk. This situation can be alleviated to some extent by the retailer keeping on hand a great number of different stocksizes; for example, stock sizes which vary by an inch from one to the other over the ordinary range of sizes sold. But, this practice also is objectionable,-because it increases inventories unreasonably and unless the retailer has provisions ;for cutting, the in-between sizes require the resetting of the mounting brackets by the buyer or installer.
The primary objective of this invention has been to provide inexpensive means for varying the lengths of tubular rollers so that the number of stock sizes required for a complete retailers' inventory-can be drastically reduced.
Toward this end there is provided an inexpensive expansible adaptor plug which receives the gudgeon pin of the window shade roller. In the preferred embodiment, this adaptor plug is molded of semi-resilient plastic material. It is adjustable axially within the tubular roller and it is easilyexpanded into locking engagement with the internal surface of the roller in any adjustable position. In my invention; this expansion is accomplished 1 by utilizing the gudgeon pin as the expander. That is, the adaptor plug is fitted into the end of the tube to a pointwhere the overall length is as required. Thereafter, the gudgeon pin is forced into a tapered bore within the plug which expands the plug to lock it securely in place within the tube.
The use of this plug fills in the gaps between the various lengths of tubes which may be carried in a reasonably sized inventory. Where it is desired to reduce the inventory of lengthsto an even greaterextent, the method of cutting disclosed here may be employed in conjunction with the adaptor plug; because, as will be seen, the adaptor plug takes the placed the usual end cap in which the gudgeon pin has been mounted in the past.
Hence, this arrangement of the elements accomplishes the objectives of reducing inventories, minimizing the number of elements necessary to provide an adjustable window shade assembly, reducing cost to a minimum, and it provides the purchaser with a simple means of length adjustment.
These and other objects will be readily apparent to one skilled in the art from the detailed description of the drawings in which:
FIGURE 1 is a front elevational view of the roller shade assembly.
3,186,475 Patented June 1, 1965 FIGURE 2 is a front elevational view of the roller shade being cut to size.
' FIGURE 3 is a front elevation of the roller shade being separated after having been cut to size.
FIGURE 4 is a transverse cross sectional view taken along the line 44 of FIGURE 1.
FIGURE 5 is a longitudinal cross sectional view of the adaptor plug.
FIGURE 6 is a front elevation of the gudgeori pin.
FIGURE 7 is an end view of a modified form of plug. FIGURE 8 is a cross sectional view of the plug of FIGURE 7.
Theroller shade assembly designated '1 comprises a tubular steel roller 2 having a shade 4 rolled thereon. This shade may be made of plastic, fabric or other appropriate materials. Mounted in one end of the tubular steel roller 2 is a conventional spring motor 6 such as that shown in Patent No. 2,586,340. Extending from the opposite end of the roller is an adaptor plug 8 from which extends one end 10 of a gudgeon pin 12.
v Referring to FIGURES 2 and 3, it will be. seen that a stock size window shade may be reduced in length by simultaneously cutting the window shade and tubular roller by means of a rotary steel diso cutter blade 14. The rotarysteel disc cutter is passed through the shade 4 and on into the tubular roller 2 while the roller is rotated by mechanical means including a mandrel 16. After the cutter has heavily scored or cut through the tubular roller, the roller is shortened to size as shown in FIGURE 3. This cutting operation may take place in the retail store so that it is not necessary to supply an unlimited number of stock sizes to the retail store. After the window shade has been cut to size, the open end of the roller is closed by means of the adaptor plug 8.
' The adaptor plug 8 is preferably made of a polyethylene material of one piece construction. The plug comprises a circular end portion or wall 18 from the periphery of which extends a cylindrical barrel 20 having .an inwardly tapered end 22. On the periphery of the flange Tare two shoulders 24 and 26 which serve to locate the wardly tapered hub portion 28. A tapered aperture 30 passes through the radially extending portion 18 of the adaptor plug and the inwardly tapered hub portion 28. Four equally spaced ribs 34 extend radially from the hub portion-28 to the interior surface of the cylindrical barrel 20. Located on the periphery of the cylindrical barrel 20 at a point bet-ween two of the ribs 34 is a groove 36 which extends from the end of the flange to the first shoulder 24. As may be seen in FIGURE 4, when the adaptor plug is inserted, the groove 36 fits over the lock seam of the tubular steel roller, thus keying the plug in place and preventing rotation.
A gudgeon pin "12 fits into the annular aperture 30 of the adaptor plug and serves to expand the adaptor plug into tight engagement with the internal surface of the tubular steel roller. The gudgeon pin is cylindrical in shape and has a point 38 at one end. As shown, the outside diameter of the pin 12 is substantially equal to the outer end of the aperture or opening 30, but the opening tapers inwardly such that the inner end thereof is substantially smaller than the outside diameter of the pin. Adjacent the opposite end of the gudgeon pin is a radially extending flange 40 which abuts against the end of the adaptor plug and serves to locate the gudgeon pin therein.
Due to the fact that the aperture 30 of the adaptor plug tapers inwardly, the hub 28, the ribs 34, and cylin dri-cal barrel 20 will be expanded radially upon insertion ing it in place. ,of the plug, the outer ends of the ,ribs are tapered as area,
into the aperture 30 of the gudgeon pin 12. Thus, the adaptor plug may be inserted into the tubular roller up to the shoulder 24 and then expanded into engagement 24 and in this position can be locked by the gudgeon pin 12. Thus a substantial latitude of adjustment for the overall length ofthe assembly is provided. I
The modification of the plug illustrated in FIGURES 7 and 8 omits the cylindrical barrel 20 at the outer ends of the radial ribs 34. Inthis case, the outer surfaces of I the ribs, indicated by the numeral 41, make contact with the inner surface of the tubular roller and when the plug is expanded by insertion of the gudgeon pin, the surfaces are tightly pressed into engagement with the roller, lock- To assist in making the initial insertion On the other shown at 42. The modified form of plug may be adjusted lock it in place, just as in the preferred embodiment.
It will be understood that the above detailed descrip-' tion is made by way of illustration and not limitation, it being contemplated that any modificationin the details of the invention may be made without departing from the scope of the appendedclaims;
Having described my invention, I claim:
1. In a shade roller assembly having a tubular metal roller with a shade rolled thereon and a spring motor at one end thereof, the improvement to facilitate the adjustment of the overall length .ofthe assembly comprising,
an expansible plug at the other end of said roller, said plug being an integral molding of semi-resilient plastic material having the characteristics of polyethylene, said plug having a circular end wall at the outer end thereof that is sufiiciently larger in diameter than a the inside diameter of said roller to prevent insertion of the plug into said roller beyond said end wall,
an elongated cylindrical barrel portion extending from the inner face of said end wall, the axis of which is coextensivetwith the central axis of said circular en'd wall and which is of an outside diameter to be received in the roller in slip-fit relation when the plug is in unexpanded condition,
I a hub portion extendingfrorn the inner face of said end Wall the axis of which is concentric to the centr-al axis of said end Wall, said hub portion having an inwardly tapering central opening therein that opens through said end wall,
a cylindrical gudgeon pin having a pointed endreceivable in the opening in said hub, a plurality of radially disposed ribs. interconnecting said barrel in said hub,
and the outer end of said opening in said hub being substantially equal in diameter to the diameter of said gudgeon pin but said opening tapering inwardly to a diameter substantially smaller than the diameter of said pin, whereby forceable insertion of the axially of the roller before the gudgeon pinis'insertedto V 4, pin into said opening expands said hub radially outwardly with the expanding force-being transmitted to said barrel through said ribs to lock said plug within said roller.
2. In a shade roller assembly having a tubular metal roller with a shade rolled thereon and a spring motor at One end thereof, the improvement to facilitate the adjustment of the overall length of the assembly comprising,
an expansible plug in the other end of said roller, said plug being an integral molding of semi-resilient plastic material having the characteristics of polyethylene, said plug having a circular end wall at the outer end thereof that is sufficiently larger in diameter than the {inside diameter of said roller to preventinser-tion of the plug into said roller beyond said end Wall, 7
theouter diameter of the remainder of said plug. being of a diameter to be received in the roller in slip-fit relation whenzthe plug is inunexpanded condition, an inwardly tapering hub portion extending from the inner face of said end wall the axis of which is concentric to the central axis of said end wall, said hub portion'having an inwardly tapering central opening therein-that opens through said end wall,
a cylindrical gudgeon pin having a pointed end receivable in the opening in said hubf,
and the outer end of said opening in said hub being substantially equal in diameter to the diameter of said gudgeon pin but said opening tapering inwardly to a diameter substantially smaller than the diameter of said pin, whereby forceable insertion of the pin intogsaid opening expands said plug radially outwardly to tightly engage the inner surface of said roll to lock said plug within said roller.
3. A plug and pin assembly for mounting in a hollow end of a shade roller comprising a plastic plug and a pin, said plug having an end Wall, a plurality of radial vanes extending from said end wall and substantially normal thereto and an axially extending opening through said plug converging from said end wall along the inner edges of said vanes, and said pin having a shank of uniform crosssecti-on and a pointed end, Whereby'insertion of said pin expands the vanes into gripping engagement with the hollow end of a shaderoller. t
References Cited by the Examiner UNITED STATES PATENTS 1,725,269 8/29 Hartshorn 160-301 1,742,454 1/30 Van Derhoef 29148.4 1,882,592 10/32 Hendriokson 160'326 1,884,104 10/32 Moore et al 29148.4 2,491,074 12/49 Bell 160326 2,573,498 10/51'f Scott -24 3,064,452 11/62 Gast l -323 X FOREIGN PATENTS 1,122,536 9/56 France. v
HARRISON R. MOSELEY, Primary Examiner.
LAWRENCE CHARLES, JEROME SCHNALL,
f Examiners.

Claims (1)

1. IN A SHADER ROLLER ASSEMBLY HAVING A TUBULAR METAL ROLLERS WITH A SHADE ROLLER THEREON AND A SPRING MOTOR AT ONE END THEREOF, THE IMPROVEMENT TO FACILITATE THE ADJUSTMENT OF THE OVERALL LENGTH OF THE ASSEMBLY COMPRISING AN EXPANSIBLE PLUG AT THE OTHER END OF SAID ROLLER, SAID PLUG BEING ANINTEGRAL MOLDING FOR SEMI-RESILIENT PLASTIC MATERIAL HAVING THE CHARACTERISTICS OF POLYMETHYLENE, SAID PLUG HAVING A CIRCULAR END WALL AT THE OUTER END THEREOF THAT IS SUFFICIENTLY LARGER IN DIAMETER THAN THE INSIDE DIAMETER OF SAID ROLLER TO PREVENT INSERTION OF THE PLUG INTO SAID ROLLER BEYOND SAID END WALL, AN ELONGATED CYLINDRICAL BARREL PORTION EXTENDING FROM THE INNER FACE OF SAID END WALL, THE AXIS OF WHICH IS COEXTENSIVE WITH THE CENTRAL AXIS OF SAID CIRCULAR END WALL AND WHICH IS OF AN OUTSIDER DIAMETER TO BE RECEIVED IN THE ROLLER IN SLIP-FIT RELATION WHEN THE PLUG IS IN UNEXPANDED CONDITION, A HUB PORTION EXTENDING FROM THE INNER FACE OF SAID END WALL THE AXIS OF WHICH IS CONCENTRIC TO THE CENTRAL AXIS OF SAID END WALL, SAID HUB PORTION HAVING AN INWARDLY TAPERING CENTRAL OPENING THEREIN THAT OPENS THROUGH SAID END WALL, A CYLINDRICAL GUDGEON PIN HAVING A POINTED END RECEIVABLE IN THE OPENING IN SAID HUB, A PLURALITY OF RADIALLY DISPOSED RIBS INTERCONNECTING SAID BARREL IN SAID HUB, AND THE OUTER END OF SAID OPENING IN SAID HUB BEING SUBSTANTIALLY EQUAL IN DIAMETER TO THE DIAMETER OF SAID GUDGEON PIN BUT SAID OPENING TAPERING INWARDLY TO A DIAMETER SUBSTANTIALLY SMALLER THAN THE DIAMETER OF SAID PIN, WHEREBY FORCEABLE INSERTION OF THE PIN INTO SAID OPENING EXPANDS SAID HUB RADIALLY OUTWARDLY WITH THE EXPANDING FORCE BEING TRANSMITTED TO SAID BARREL THROUGH SAID RIBS TO LOCK SAID PLUG WITHIN SAID ROLLER.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3531068A (en) * 1967-07-29 1970-09-29 Artur Fischer Anchoring element
US20100200176A1 (en) * 2007-08-01 2010-08-12 Denis Magli Actionneur tubulaire pour l'entrainement d'un ecran domotique

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1725269A (en) * 1928-04-21 1929-08-20 Stewart Hartshorn Co Shade roller
US1742454A (en) * 1927-06-22 1930-01-07 Dodge Mfg Corp Method of making rolls
US1882592A (en) * 1931-11-02 1932-10-11 Adlake Co Curtain roller
US1884104A (en) * 1928-11-08 1932-10-25 American Sheet & Tin Plate Method of resurfacing rolls
US2491074A (en) * 1948-02-09 1949-12-13 Edwin F Bell Roller awning gudgeon
US2573498A (en) * 1945-04-20 1951-10-30 George M Scott Wall plug
FR1122536A (en) * 1955-04-12 1956-09-10 Applic Plastiques Gravures Wall anchor
US3064452A (en) * 1961-10-30 1962-11-20 Star Shade Cutter Company Plug and pin assembly for shade rollers

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1742454A (en) * 1927-06-22 1930-01-07 Dodge Mfg Corp Method of making rolls
US1725269A (en) * 1928-04-21 1929-08-20 Stewart Hartshorn Co Shade roller
US1884104A (en) * 1928-11-08 1932-10-25 American Sheet & Tin Plate Method of resurfacing rolls
US1882592A (en) * 1931-11-02 1932-10-11 Adlake Co Curtain roller
US2573498A (en) * 1945-04-20 1951-10-30 George M Scott Wall plug
US2491074A (en) * 1948-02-09 1949-12-13 Edwin F Bell Roller awning gudgeon
FR1122536A (en) * 1955-04-12 1956-09-10 Applic Plastiques Gravures Wall anchor
US3064452A (en) * 1961-10-30 1962-11-20 Star Shade Cutter Company Plug and pin assembly for shade rollers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3531068A (en) * 1967-07-29 1970-09-29 Artur Fischer Anchoring element
US20100200176A1 (en) * 2007-08-01 2010-08-12 Denis Magli Actionneur tubulaire pour l'entrainement d'un ecran domotique

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