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EP 2 199 529 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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16.08.2017 Bulletin 2017/33 |
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Date of filing: 15.12.2009 |
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International Patent Classification (IPC):
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Screen assembly
Schirmanordnung
Ensemble d'écran
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Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO
PL PT RO SE SI SK SM TR |
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Priority: |
16.12.2008 GB 0822891
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Date of publication of application: |
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23.06.2010 Bulletin 2010/25 |
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Proprietor: Fourds Limited |
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Northern Ireland BT45 7AB (GB) |
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Inventor: |
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- Diamond, Cormac
Draperstown
County Londonderry BT45 7AB (GB)
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Representative: Waller, Stephen et al |
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FRKelly
4 Mount Charles Belfast, Northern Ireland BT7 1NZ Belfast, Northern Ireland BT7 1NZ (GB) |
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References cited: :
WO-A1-2008/090577
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DE-A1-102006 032 933
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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[0001] This invention relates to screen assembly for a window, and in particular to a self-locking
screen assembly for a roof light, that can be reliably locked in any desired position
between fully opened and fully closed.
[0002] Windows, and in particular roof lights, are typically provided with screen assemblies
fitted to the inside of the frame thereof for selectively obscuring the window. Such
screen assemblies typically have a spring tensioned roller mounted at an upper side
of the frame, around which a suitable screen is wound. A free end of the screen is
attached to a movable beam or handle which is movably engaged, at its longitudinal
ends, in side guide tracks arranged on opposite lateral sides of the screen.
[0003] Typically the ends of the handle are provided with locking devices adapted to engage
the guide tracks to lock the screen in any desired position against the restoring
force of the tensioned roller. The locking devices typically comprise locking members,
often in the form of eccentric cams or blocks, mounted to the ends of the handle to
be rotatable between a locking position, wherein they engage the guide tracks to prevent
movement of the screen, and an unlocked position, wherein the screen is free to move,
the locking devices being rotatable to their locking positions under the tension applied
by the tensioned roller on the screen and being rotated to their unlocked position
by a force applied to the handle against the tension applied by the tensioned roller.
[0004] Thus the locking devices can freely move along the guide track while the handle is
being pulled against the tension of the roller and are automatically returned to their
locking positions by the tension applied to the screen by the roller once the handle
is released.
[0005] A particular difficulty with these known arrangements is that the locking devices
are symmetrically duplicated on the relevant opposite lateral sides of these and,
as a consequence, have to operate simultaneously. Manufacturing tolerances, wear and
flexure in the materials of the handle, guide tracks and the locking devices can interfere
with the simultaneous operation of the locking devices. As a result the screen is
occasionally only locked on one lateral side of the screen and the screen can jam
or become distorted.
[0006] DE102006032933 and
WO 2008/090577 are examples of known tensioned screens with locking devices engaging guide tracks
between which the screen is mounted.
[0007] According to the present invention there is provided a screen assembly for a window
as claimed in claim 1.
[0008] Preferably said handle and associated locking devices are rotatable between said
locked and unlocked positions about an axis extending transversely of the screen,
each respective connection means being adapted to permit limited rotational movement
of the respective locking device with respect to the handle between defined stops
or abutments.
[0009] Preferably the handle is connected to the screen such that the handle and associated
locking devices are pivoted towards said locked position under the action of the tensioned
screen whereby the locking devices engage the guide tracks to automatically lock the
screen in a desired position when the handle is released by a user. Preferably the
screen is attached to the handle at a position offset from and parallel to said rotational
axis of the handle such that the tension applied to the handle via the tensioned screen
rotates the handle towards its locked position.
[0010] In one embodiment, each guide track comprises an elongate rail, each locking device
comprises first and second parts located opposite sides of the rail such that rotation
of the locking device brings said first and second parts of the locking device into
engagement with either side of the rail to grip the rail. Alternatively each guide
track comprises a pair of parallel rails, each locking device being located between
the parallel rails of a respective guide track, each locking device having an elliptical
or elongated shape having a length greater than the width of the track.
[0011] An embodiment of the present invention will now be described, by way of example only,
with reference to the accompanying drawings, in which :-
Figure 1 is a perspective view of a roof light provided with a screen assembly according
to an embodiment of the present invention;
Figure 2 is a detailed view of the blind assembly of Figure 1;
Figure 3 is a further detailed view of the blind assembly of Figure 1;
Figure 4 is a side view of a locking device of the blind assembly of Figure 1;
Figure 5 is a perspective view of the locking device of Figure 4;
Figure 6 is an exploded view of the locking device of Figure 4; and
Figure 7 is a perspective view of an operative part of the locking device of Figure
4.
[0012] As shown in Figure 1, a screen assembly 10 for a roof light comprises a spring tensioned
roller 12 mounted at an upper side of the window frame, around which a suitable screen
14 is wound. A free end of the screen 14 is attached to an elongate handle 16 which
is movably engaged, at its longitudinal ends, in side guide tracks 20,22 arranged
on opposite lateral sides of the screen 14.
[0013] The ends of the handle 16 are provided with locking devices 30,40 adapted to engage
the guide tracks 20,22 to lock the screen 14 in any desired position against the restoring
force of the tensioned roller 12.
[0014] The locking devices each comprise first and second parts 50,52 located opposite sides
of an elongate rail 60 of the respective guide track 20,22 such that rotation of the
handle and the associated locking device 30,40 brings said first and second parts
50,52 thereof into engagement with either side of the rail 60 to grip the rail 60.
[0015] As can be seen from Figures 2 and 3, the handle and locking devices 30,40 are rotatable
about an axis extending transversely to the screen 14 (omitted from Figs. 2 and 3
for clarity) between a locking position, wherein the first and second parts 50,52
of the locking devices 30,40 engage the respective rail 60 of the guide tracks 20,22
tracks to prevent movement of the screen 14, and an unlocked position, wherein the
screen 14 is free to move, the handle and locking devices being rotatable to their
locking positions under the tension applied by the tensioned roller on the screen
and being rotated to their unlocked position by a force applied to the handle against
the tension applied by the tensioned roller. The handle 16 is provided with an elongate
channel 25 for receiving the screen such that the tensioned screen acts on the handle
16 to pivot the handle about a fulcrum defined by the pivot axis of the locking devices
30,40 whereby the tensioned screen 14 pulls on the handle 16 to rotate the handle
and locking devices 30,40 towards their respective locking positions.
[0016] As illustrated in Figures 4 to 7, each locking device 30,40 (which are symmetrically
provided on either end of the handle 16 and are mirror images of each other) comprises
a base part 100 mountable on a respective end of the handle 16 and a locking part
110 mounted on the base part 100 for limited rotational movement with respect to the
base part about the rotatable axis of the locking devices 30,40.
[0017] The locking part 110 of each locking device 30,40 is provided with a central spindle
120 receivable within an aperture 130 in the base part 100. The cooperating faces
of the locking part 110 and base part 100 are provided with cooperating features which
permit limited rotational movement of the locking part 110 with respect to the base
part 100. As best seen from Figure 6, such cooperating features comprise a pair of
axially projecting arcuate members 140 on the base part receivable in corresponding
arcuate slots or recesses 150 provided on the locking part 110, said arcuate slots
150 and corresponding arcuate members 140 being arranged concentrically with said
central spindle 120 and the arcuate members 140 having a circumferential extent less
than that of the arcuate slots 150 whereby the locking part 100 can rotate with respect
to the base part 110 within limits defined by the interaction of the arcuate members
140 and the arcuate slots 150. Such difference in circumferential extent may be as
little as 1° depending upon the manufacturing and fitting tolerances of the screen
assembly, in particular the guide tracks 20,22, and the flexibility of the materials
of the screen assembly.
[0018] Many other arrangements of cooperating features are envisaged for permitting limited
rotational movement between the base part and locking part of each locking device,
such as cooperating pins and recesses provided on the base and locking parts respectively,
or vice versa.
[0019] The invention is not limited to the embodiment(s) described herein but can be amended
or modified without departing from the scope of the present invention as defined by
the appended claims.
1. A screen assembly (10) for a window comprising a tensioned screen (14) moveable between
a pair of spaced guide tracks (20,22), a handle (16) being mounted on a free end of
the screen (14) between said guide tracks (20,22), and a locking device (30,40) mounted
on each end of the handle (16), the handle (16) being moveable between a locking position,
wherein the locking devices respectively engage a respective one of the guide tracks
(20,22) to prevent movement of the screen (14), and an unlocked position, wherein
the locking devices (30,40) are free to slide along respective guide tracks (20,22)
such that the screen (14) is free to move with respect to the guide tracks (20,22),
said handle (16) and associated locking devices (30,40) being biased towards said
locked position by the action of the tensioned screen (14) on the handle (16) and
being moveable towards said unlocked position, against said biasing force of the tensioned
screen, wherein each locking device (30,40) is connected to a respective end of the
handle (16) by connection means permitting limited movement of the respective locking
device (30,40) with respect to the handle (16) to accommodate misalignment between
the locking devices (30,40) and the guide tracks (20,22), wherein each locking device
(30,40) comprises a base part (100) mountable on a respective end of the handle (16)
and a locking part (110) mounted on the base part (100) for limited rotational movement
with respect to the base part (100) about the rotational axis of the handle (16),
characterised in that the locking part (100) of each locking device (30,40) is provided with a central
spindle (120) rotatably receivable within an aperture (130) in the base part (100),
cooperating faces of the locking part (110) and base part (100) being provided with
cooperating features which permit limited rotational movement of the locking part
(110) with respect to the base part (100), said cooperating features comprise one
or more axially projecting arcuate members (140) provided on the base part (100) receivable
in one or more corresponding arcuate slots or recesses (150) provided on the locking
part (110), said one or more arcuate slots and said one or more corresponding arcuate
members being arranged concentrically with said central spindle (120) and the or each
arcuate members (140) having a circumferential extent less than that of the or each
corresponding arcuate slots (150) whereby the locking part (110) can rotate with respect
to the base part (100) within limits defined by the interaction of the one or more
arcuate members (140) and the one or more arcuate slots (150).
2. A screen assembly as claimed in claim 1, wherein the handle (16) comprises an elongate
bar mounted on a lower end of the screen.
3. A screen assembly as claimed in any preceding claim, wherein said handle (16) and
associated locking devices (30,40) are rotatable between said locked and unlocked
positions about an axis extending transversely of the screen (14), each respective
connection means being adapted to permit limited rotational movement of the respective
locking device with respect to the handle between defined stops or abutments.
4. A screen assembly as claimed in claim 3, wherein the handle (16) is mounted for pivotal
movement about said rotational axis with respect to the guide tracks (20,22) between
said locked and unlocked positions, the handle (16) being attached to the screen (14)
such that the handle is pivoted towards its locked position under the action of the
tensioned screen whereby the locking devices (30,40) engage the guide tracks (20,22)
to automatically lock the screen (14) in a desired position when the handle (16) is
released by a user.
5. A screen assembly as claimed in claim 4, wherein the screen (14) is attached to the
handle (16) at a position offset from and parallel to said rotational axis of the
handle such that the tension applied to the handle via the tensioned screen rotates
the handle towards its locked position.
6. A screen assembly as claimed in any preceding claim, wherein each guide track (20,22)
comprises an elongate rail (60), each locking device (30,40) comprises first and second
parts (50,52) located opposite sides of the rail (60) such that rotation of the locking
device (30,40) brings said first and second parts (50,52) of the locking device (30,40)
into engagement with either side of the rail (60) to grip the rail (60).
7. A screen assembly as claimed in any of claims 1 to 5, wherein each guide track (20,22)
comprises a pair of parallel rails, each locking device (30,40) being located between
the parallel rails of a respective guide track, each locking device (30,40) having
an elliptical or elongated shape having a length greater than the width of the track.
1. Rollobaugruppe (10) für ein Fenster mit einem gespannten Rollo (14), das zwischen
einem Paar beabstandeter Führungsbahnen (20, 22) beweglich ist, wobei ein Handgriff
(16) an einem freien Ende des Rollos (14) zwischen den Führungsschienen (20, 22) angebracht
ist und eine Verriegelungsvorrichtung (30, 40) an jedem Ende des Handgriffs (16) angebracht
ist, wobei der Handgriff (16) zwischen einer Verriegelungsposition, bei der die Verriegelungsvorrichtungen
jeweils in eine der Führungsbahnen (20, 22) einrasten, um eine Bewegung des Rollos
(14) zu verhindern, und einer entriegelten Position, bei der die Verriegelungsvorrichtungen
(30, 40) frei sind, entlang der jeweiligen Führungsbahnen (20, 22) zu gleiten, beweglich
ist, so dass sich das Rollo (14) in Bezug auf die Führungsbahnen (20, 22) frei bewegen
kann, wobei der Handgriff (16) und die zugehörigen Verriegelungsvorrichtungen (30,
40) durch die Wirkung des gespannten Rollos (14) an dem Handgriff (16) in Richtung
der verriegelten Position vorgespannt sind und gegen die Vorspannkraft des gespannten
Rollos in Richtung der entriegelten Position beweglich sind, wobei jede Verriegelungsvorrichtung
(30, 40) mit einem jeweiligen Ende des Handgriffs (16) durch Verbindungsmittel verbunden
ist, die eine begrenzte Bewegung der jeweiligen Verriegelungsvorrichtung (30, 40)
in Bezug auf den Handgriff (16) ermöglichen, um eine Fehlausrichtung zwischen den
Verriegelungsvorrichtungen (30, 40) und den Führungsbahnen (20, 22) aufzunehmen, wobei
jede Verriegelungsvorrichtung (30, 40) ein Basisteil (100), das an einem jeweiligen
Ende des Handgriffs (16) angebracht werden kann, und ein Verriegelungsteil (110),
das an dem Basisteil (100) angebracht ist, für eine begrenzte Drehbewegung in Bezug
auf das Basisteil (100) um die Drehachse des Handgriffs (16) umfasst, dadurch gekennzeichnet, dass das Verriegelungsteil (100) jeder Verriegelungsvorrichtung (30, 40) mit einer zentralen
Spindel (120) versehen ist, die innerhalb einer Öffnung (130) in dem Basisteil (100)
drehbar aufgenommen werden kann, wobei zusammenwirkende Flächen des Verriegelungsteils
(110) und des Basisteils (100) mit zusammenwirkenden Merkmalen versehen sind, die
eine begrenzte Drehbewegung des Verriegelungsteils (110) gegenüber dem Basisteil (100)
ermöglichen, wobei die zusammenwirkenden Merkmale ein oder mehrere axial vorstehende
bogenförmige Elemente (140) umfassen, die an dem Basisteil (100) vorgesehen sind,
die in einem oder mehreren entsprechenden bogenförmigen Schlitzen oder Ausnehmungen
(150), die an dem Verriegelungsteil (110) vorgesehen sind, aufgenommen werden können,
wobei der eine oder die mehreren bogenförmigen Schlitze und der eine oder die mehreren
entsprechenden bogenförmigen Elemente konzentrisch mit der zentralen Spindel (120)
angeordnet sind und das bzw. jedes bogenförmige Element (140) eine Umfangsausdehnung
aufweist, die geringer ist als die des bzw. jedes entsprechenden bogenförmigen Schlitzes
(150), wobei sich das Verriegelungsteil (110) in Bezug auf das Basisteil (100) innerhalb
von Grenzen drehen kann, die durch die Wechselwirkung des einen oder der mehreren
bogenförmigen Elemente (140) und des einen oder der mehreren bogenförmigen Schlitze
(150) definiert sind.
2. Rollobaugruppe nach Anspruch 1, wobei der Handgriff (16) einen länglichen Stab umfasst,
der an einem unteren Ende des Rollos angebracht ist.
3. Rollobaugruppe nach einem der vorhergehenden Ansprüche, wobei der Handgriff (16) und
zugeordnete Verriegelungsvorrichtungen (30, 40) zwischen den verriegelten und entriegelten
Positionen um eine quer zum Rollo (14) verlaufende Achse drehbar sind, wobei jedes
jeweilige Verbindungsmittel dafür ausgelegt ist, eine begrenzte Drehbewegung der jeweiligen
Verriegelungsvorrichtung in Bezug auf den Handgriff zwischen definierten Stoppern
oder Anschlägen zu ermöglichen.
4. Rollobaugruppe nach Anspruch 3, wobei der Handgriff (16) um die Drehachse in Bezug
auf die Führungsbahnen (20, 22) zwischen den verriegelten und entriegelten Positionen
schwenkbar gelagert ist, wobei der Handgriff (16) an dem Rollo (14) befestigt ist,
so dass der Handgriff unter der Wirkung des gespannten Rollos in Richtung seiner verriegelten
Position geschwenkt wird, wodurch die Verriegelungsvorrichtungen (30, 40) in die Führungsbahnen
(20, 22) eingreifen, um das Rollo (14) automatisch in einer gewünschten Position zu
verriegeln, wenn der Handgriff (16) von einem Benutzer freigegeben wird.
5. Rollobaugruppe nach Anspruch 4, wobei das Rollo (14) an dem Handgriff (16) an einer
Position angebracht ist, die sich versetzt von und parallel zu der Drehachse des Handgriffs
befindet, so dass die Spannung, die über das gespannte Rollo auf den Handgriff angewendet
wird, den Handgriff in Richtung seiner verriegelten Position dreht.
6. Rollobaugruppe nach einem der vorhergehenden Ansprüche, wobei jede Führungsbahn (20,
22) eine längliche Schiene (60) umfasst, wobei jede Verriegelungsvorrichtung (30,
40) erste und zweite Teile (50, 52) umfasst, die an gegenüberliegenden Seiten der
Schiene (60) angeordnet sind, so dass die Drehung der Verriegelungsvorrichtung (30,
40) die ersten und zweiten Teile (50, 52) der Verriegelungsvorrichtung (30, 40) in
Eingriff mit jeder Seite der Schiene (60) bringt, um die Schiene (60) zu greifen.
7. Rollobaugruppe nach einem der Ansprüche 1 bis 5, wobei jede Führungsbahn (20, 22)
ein Paar paralleler Schienen umfasst, wobei jede Verriegelungsvorrichtung (30, 40)
zwischen den parallelen Schienen einer jeweiligen Führungsbahn angeordnet ist, wobei
jede Verriegelungsvorrichtung (30, 40) eine elliptische oder längliche Form mit einer
Länge aufweist, die größer als die Breite der Bahn ist.
1. Ensemble formant écran (10) pour une fenêtre comportant un écran sous tension (14)
mobile entre une paire de chemins de guidage espacés (20, 22), une poignée (16) qui
est montée sur une extrémité libre de l'écran (14) entre lesdits chemins de guidage
(20, 22), et un dispositif de verrouillage (30, 40) monté sur chaque extrémité de
la poignée (16), la poignée (16) étant mobile entre une position de verrouillage,
dans laquelle les dispositifs de verrouillage entrent respectivement en prise avec
un chemin de guidage respectif des chemins de guidage (20, 22) pour empêcher tout
mouvement de l'écran (14), et une position déverrouillée, dans laquelle les dispositifs
de verrouillage (30, 40) sont libres de coulisser le long des chemins de guidage respectifs
(20, 22) de telle sorte que l'écran (14) est libre de se déplacer par rapport aux
chemins de guidage (20, 22), ladite poignée (16) et les dispositifs de verrouillage
associés (30, 40) étant sollicités vers ladite position verrouillée sous l'action
de l'écran sous tension (14) sur la poignée (16) et étant mobiles vers ladite position
déverrouillée, contre ladite force de sollicitation de l'écran sous tension, dans
lequel chaque dispositif de verrouillage (30, 40) est connecté à une extrémité respective
de la poignée (16) par des moyens de connexion permettant un mouvement limité du dispositif
de verrouillage respectif (30, 40) par rapport à la poignée (16) pour tenir compte
de tout défaut d'alignement entre les dispositifs de verrouillage (30, 40) et les
chemins de guidage (20, 22), dans lequel chaque dispositif de verrouillage (30, 40)
comporte une partie de base (100) en mesure d'être montée sur une extrémité respective
de la poignée (16) et une partie de verrouillage (110) montée sur la partie de base
(100) à des fins de mouvement de rotation limité par rapport à la partie de base (100)
autour de l'axe de rotation de la poignée (16), caractérisé en ce que la partie de verrouillage (100) de chaque dispositif de verrouillage (30, 40) comporte
une broche centrale (120) en mesure d'être reçue de manière rotative à l'intérieur
d'une ouverture (130) dans la partie de base (100), des faces de coopération de la
partie de verrouillage (110) et de la partie de base (100) comportant des caractéristiques
de coopération qui permettent un mouvement de rotation limité de la partie de verrouillage
(110) par rapport à la partie de base (100), lesdites caractéristiques de coopération
comportent un ou plusieurs éléments arqués se projetant dans le sens axial (140) mis
en oeuvre sur la partie de base (100) en mesure d'être reçus dans une ou plusieurs
fentes, ou évidements, arquées correspondantes (150) mises en oeuvre sur la partie
de verrouillage (110), lesdites une ou plusieurs fentes arquées et lesdits un ou plusieurs
éléments arqués correspondants étant agencés de manière concentrique avec ladite broche
centrale (120) et le ou chaque élément arqué (140) ayant une étendue circonférentielle
inférieure à celle de la ou de chaque fente arquée correspondante (150) ce par quoi
la partie de verrouillage (110) peut tourner par rapport à la partie de base (100)
dans des limites définies par l'interaction desdits un ou plusieurs éléments arqués
(140) et desdites une ou plusieurs fentes arquées (150).
2. Ensemble formant écran selon la revendication 1, dans lequel la poignée (16) comporte
une barre allongée montée sur une extrémité inférieure de l'écran.
3. Ensemble formant écran selon l'une quelconque des revendications précédentes, dans
lequel ladite poignée (16) et lesdits dispositifs de verrouillage associés (30, 40)
sont rotatifs entre lesdites positions verrouillée et déverrouillée autour d'un axe
s'étendant dans le sens transversal de l'écran (14), chaque moyen de connexion respectif
étant adapté pour permettre un mouvement de rotation limité du dispositif de verrouillage
respectif par rapport à la poignée entre des arrêts, ou points d'appui, définis.
4. Ensemble formant écran selon la revendication 3, dans lequel la poignée (16) est montée
à des fins de mouvement pivotant autour dudit axe de rotation par rapport aux chemins
de guidage (20, 22) entre lesdites positions verrouillée et déverrouillée, la poignée
(16) étant attachée à l'écran (14) de telle sorte que la poignée est pivotée vers
sa position verrouillée sous l'action de l'écran sous tension ce par quoi les dispositifs
de verrouillage (30, 40) entrent en prise avec les chemins de guidage (20, 22) pour
verrouiller automatiquement l'écran (14) dans une position souhaitée quand la poignée
(16) est lâchée par un utilisateur.
5. Ensemble formant écran selon la revendication 4, dans lequel l'écran (14) est attaché
à la poignée (16) au niveau d'une position décalée et parallèle par rapport audit
axe de rotation de la poignée de telle sorte que la tension appliquée sur la poignée
par le biais de l'écran sous tension fait tourner la poignée vers sa position verrouillée.
6. Ensemble formant écran selon l'une quelconque des revendications précédentes, dans
lequel chaque chemin de guidage (20, 22) comporte un rail allongé (60), chaque dispositif
de verrouillage (30, 40) comporte des première et deuxième parties (50, 52) situées
sur des côtés opposés du rail (60) de telle sorte que la rotation du dispositif de
verrouillage (30, 40) met lesdites première et deuxième parties (50, 52) du dispositif
de verrouillage (30, 40) en prise avec un côté et l'autre du rail (60) pour saisir
le rail (60).
7. Ensemble formant écran selon l'une quelconque des revendications 1 à 5, dans lequel
chaque chemin de guidage (20, 22) comporte une paire de rails parallèles, chaque dispositif
de verrouillage (30, 40) étant situé entre les rails parallèles d'un chemin de guidage
respectif, chaque dispositif de verrouillage (30, 40) ayant une forme elliptique ou
allongée ayant une longueur supérieure à la largeur du chemin.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description