EP1552102A1 - A system for tilting a number of slats in a screening device - Google Patents
A system for tilting a number of slats in a screening deviceInfo
- Publication number
- EP1552102A1 EP1552102A1 EP03798080A EP03798080A EP1552102A1 EP 1552102 A1 EP1552102 A1 EP 1552102A1 EP 03798080 A EP03798080 A EP 03798080A EP 03798080 A EP03798080 A EP 03798080A EP 1552102 A1 EP1552102 A1 EP 1552102A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- slats
- handle
- turning point
- string loop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- E06B9/26—Lamellar or like blinds, e.g. venetian blinds
- E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
- E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
- E06B9/32—Operating, guiding, or securing devices therefor
- E06B9/326—Details of cords, e.g. buckles, drawing knobs
Definitions
- the present invention relates to a system for tilting a number of slats in a screening device, preferably a Venetian blind, comprising a shaft in connection with the slats, and which transfers rotation for tilting the slats until a predetermined angle, a string loop extending between an upper and a lower turning point, where the upper turning point is arranged as a driving means, which through movement of the string loop transfers rotation to the shaft .
- Screening devices such as Venetian blinds, are often arranged in connection with openings of buildings to screen the light in directly penetrating into the building.
- the inconvenience by direct light into the eyes as well as potential bleaching of the furniture in the buildings are avoided.
- the screening device is adjustable so that the amount of light, which penetrate into the building, is suitable for the individual persons who stay there .
- Another object of the screening device is to prevent persons from being able to see directly into the building. In this case it is also important to adjust the device, so that the visibility into the building is minimal, while the amount of entered light suits the persons in the building.
- the screening devices with slats, which can be tilted.
- the slats can be tilted so that they fulfil the need for light penetration and visibility. The more the slats are tilted the more they screen.
- the use of slats in the screening devices has likewise proven advantageous in that the tilting of these can produce a light regulating effect, thus enabling control of the light penetrating through the slats, up in the ceiling or down towards the floor, respectively.
- the slats can be raised so that the actual opening of the building is free.
- the slats can be tilted by rotation of a rod.
- the slats can be tilted until a position, in which they touch each other, and hereby a further tilting of the individual slat is prevented.
- the known devices possess the disadvantage, that when the rod is further rotated, after the slat has obtained its maximum angle, the connection of the rod to the slats may break as the force transferred by the user does not tilt the slats, but on the other hand is absorbed by the actual connection between the rod and the slat. Most frequently these connections are of such a de- sign that they cannot absorb this force, for which reason they usually are destroyed.
- these screening devices or Venetian blinds are placed in all sorts of openings of buildings, among these the large window fronts, where the Venetian blinds may be placed over several storeys both inside and outside of the window front .
- Venetian blinds in roof windows which are often placed to follow the inclination of the roof. These said windows are often placed, so that the user can only with difficulty reach the window for which reason tilting of the slats in a Venetian blind in such windows is to take place in a great distance of the window.
- the need for the amount of light and light direction and how much screening each person needs differs to a large degree individually and may change many times during the day.
- the users of the Venetian blinds may have different heights, especially if it is a case of both children and adults. For that reason there has for a long time been a need for a solution for tilting of the slats in a Venetian blind, in which the control devices for tilting may be placed in different heights depending on the different heights of the users.
- a Venetian blind system is dis- closed, which is placed within the actual window-.
- the tilting of the slats occurs by displacing a pawl, which is in connection with a string, up and down 'in a short groove permanently placed in the window frame.
- the length of the groove is determined by the size of an angle, with which the slats can be tilted.
- the permanently placing of the groove in the frame on the side of the Venetian blind entails that the system cannot be adjusted to fit a taller or lower person, who wants to tilt the slats.
- the placing of the groove is limited to place- ent within the length of the Venetian blind and thus cannot be placed substantially under the opening of the building .
- the matter is in general that the devices, which the user is using for tilting of the slats, can not be placed freely so as to rectify for different heights of the user or for the placement of the Venetian blind relative to the user.
- the object of the present invention is to provide a system for tilting a number of slats in a screening device, which can freely be adjusted for use by both tall and low users.
- Another object of the present invention is to provide a system for tilting a number of slats in a screening device, which can be used for all kinds of building open- ings, both roof windows and openings of buildings in the height of a man.
- a further object of the present invention is to provide a system for tilting a number of slats in a screening de- vice, where a unintended pull in the control device does not destroy the connection between the latter and the slats and by that the function of being able to tilt the slats by movement of the control device.
- the present invention is new and characterised in that a handle is arranged on the string loop and is movable between the upper and the lower turning point, and is ar- ranged so as by movement of the handle a force is applied, which tilts the slats until a predetermined angle. Furthermore, at least one carrier is arranged in connection with the .shaft and follows the rotation of the shaft between two permanently defined end positions. Furthermore, the carrier puts at the end positions a disconnecting mechanism in force, so that the handle can be optionally positioned between the turning points.
- the handle easily may be adjusted to a random position of height, so that the system in an advantageous way may be utilized by different kinds of users of different heights .
- a further advantage is that the slats are not damaged due to the force supplied to the system by the user, which is greater than the force, which stops the tilting in the known systems. This further force is utilized according to the present invention to adjust the placement of the handle on the string loop.
- the tilting of the slats in the screening device according to the present invention is carried out in that the handle is pulled or pushed by the user in one direction.
- the string loop is moved around the upper driving means, whereby the shaft is rotated.
- the slats are connected with the shaft and are tilted by this rotation until the predetermined angle.
- the disconnecting mechanism disconnects the handle from the slats, so that the continuous movement in the same direction occurs without tilting the slats.
- the user may place the handle in the position de- sired by him or her. When this position has been reached, it is possible in a simple way to fine-tune the tilting of the slats, so that the needs of the users are ob- tained, by moving the handle up or down between the predetermined angles of the slats.
- a carrier follows the rota- tion of the shaft between two permanently defined end positions, which are determined by the predetermined angle.
- the predetermined angle corresponds to the maximum angle change of a slat, so that two adjacent slats are situated substantially close to one another.
- a string loop is defined by an endless string or at least a string, which is fastened to the same object at its ends, where the string alternatively may be a band, a rope, a string of pearls, a steel wire, a core or a notched belt.
- a handle as described above is defined by a unit which may be operated by the user, where the handle may be a unit in a firm or soft material, which is fastened to the string loop and alternatively a noose on the string.
- the disconnecting device may comprise a spring.
- the spring may be wound at least once around the shaft, and the ends of the spring may constitute a first and a second carrier, respectively, so that the spring and the carrier follow the rotation of the shaft between the end positions.
- the wound spring applies a spring force against the shaft.
- the carriers are in an advantageous way arranged as an integrated part of the ends of the spring.
- the force which is further applied to the handle, when the carrier has reached the end position, is transferred to rotation of the shaft without tilting the slats.
- the handle may in an advantageous way be adjusted to the height chosen by the user.
- an advantageous system is obtained, which is very dependable.
- the disconnecting mechanism may be arranged to disconnect, when the frictional force between the string loop and the upper turning point is less than the force, which is applied to the handle.
- the shaft will rotate via the frictional force, which is present between the string loop and the upper turning point .
- the rotation of the shaft stops.
- the force will be greater than the frictional force between the string loop and the up- per turning point, whereby the string loop will continue to slide around the turning point without transferring further rotation to the shaft and thereby tilting of the slats.
- the user may freely adjust the height and placement of the handle.
- a simple system for tilting a number of slats is obtained, wherein the handle in a simple way may be adjusted in the height.
- the disconnecting mechanism may be arranged to disconnect, when the frictional force between the shaft and the upper turning point is less than the force, which is applied to the handle.
- the shaft is driven round via the rotation of the upper turning point until the predetermined angle.
- the force which is applied to the handle will overcome the frictional force between the shaft and the turning point, so that the shaft does no longer rotate, but that the turning point continues its rotation.
- the handle may easily be adjusted in the height, so that it fits an individual user.
- the system may comprise a gearwheel, which is arranged to transfer movement of the handle to rotation of the shaft.
- the string loop may be placed decentralized relative to the shaft and thus placed more expedient by arranging the screening device in different openings of the buildings. Simultaneously, a safe transfer of rotation to the shaft is obtained.
- the driving means may comprise a spring, which is arranged for holding the driving means in engagement with the shaft or one part in between. The spring may be arranged to press the driving means towards the shaft, so that a greater friction occurs between them. It may also be the case that the spring is placed between the shaft and the driving means or in connection with a connecting link there in between.
- the string loop and the handle may be arranged in a slide between the driving means and the lower turning point .
- the string loop may be guided in a slide, so that it follows the underside of the ceiling, when the system by way of example is placed in a roof window.
- the handle may be permanently arranged on the string loop.
- the handle is not unintendedly released from the string loop.
- a further advantage is that the handle does not slide on the string loop during use.
- the distance between the upper and lower turning point may be less, identical, or greater, respectively, than the height of -the opening of the building, wherein screening devices may be used. At these different distances it is possible to adjust the string loop to dif- ferent users of the screening devices in different openings of the building.
- the invention also relates to a screening device with a number of slats, preferably a Venetian blind, at which said screening device comprises a shaft, which is in connection with the slats and transfers rotation for tilting the slats until a predetermined angle, and a string loop extending between a upper and a lower turning point, at which the upper turning point is arranged as a driving means, which via movement of the string loop transfers rotation to the shaft, which is characterised in that a handle is arranged on the string loop and is movable between the upper and the lower turning point, and is arranged so as by movement of the handle a force is applied, which tilts the slats until a predetermined angle.
- a carrier is arranged in connection with the shaft and follows the rotation of the shaft between two permanently defined end positions. Moreover, the carrier puts a disconnecting mechanism in force at the end positions.
- the present invention also relates to a disconnecting mechanism for a system for tilting a number of slats in a screening device, preferably a Venetian blind, where the system comprises a shaft, which is in connection with the slats and transfers rotation for tilting of the slats until a predetermined angle, a string loop extending between an upper and lower turning point, at which the up- per turning point is arranged as a driving means, which via movement of the string loop transfers rotation to the shaft, a handle is arranged on the string loop and is movable between the upper and the lower turning point, and is arranged so that by movement of the handle a force is applied, which tilts the slats until a predetermined angle, and that a carrier is arranged in connection with the shaft and follows the rotation of the shaft between two permanently defined end positions .
- the disconnecting mechanism is characterised in that the disconnecting mechanism is arranged for disconnecting the handle from the slats by the predetermined angle so that the continuous movement of the handle
- Fig. 1 shows a screening device according to the present invention for use in an opening of the window in a roof
- Fig. 2 shows in a exploded projection an embodiment according to the present invention, where the disconnecting mechanism is arranged in connection with the shaft and the slat,
- Fig. 3 shows in an exploded projection another embodiment according to the present invention, where the disconnect- ing mechanism is arranged in connection with the driving means , and
- Fig. 4 shows in perspective the free wheel clutch according to the present invention.
- Fig. 1 shows a screening device 1 according to the present invention for use in an opening of the window 2 in a roof .
- the string loop 3 extending in this embodiment along the frame of the window 4, which follows the inclination of the roof and is led further down along the wall 5, so as it is possible for a user to adjust the tilting of the slats 6 of the screening device 1.
- a handle 12 is arranged on the lowest part of the string loop 3.
- the string loop 3 extends in this embodiment between an upper 10 and a lower 11 turning point. Further- more, the string loop 3 is held up to the wall via a turning block (not shown) immediately below the window 2.
- FIG. 2 an embodiment of the system 7 for tilting a number of slats in a screening device, preferably a Ve- netian blind, is shown in a exploded projection.
- a plurality of slats 6 is placed horizontally above each other.
- the system 7 comprises a shaft 8, which is in connection with the slats 6 and transfers rotation for tilting of the slats 6 until a predetermined angle.
- the shaft 8 and the slats 6 are in this case connected via tip strings 9, which are arranged for holding the slats 6 in a predetermined distance from each other.
- the system 7 comprises a string loop 3 extending between an upper 10 and a lower 11 turning point, where the upper turning point 10 is arranged as a driving means, which via movement of the string loop 3 transfers rotation to the shaft 8.
- the two turning points 10, 11 may in an advantageous way be designed as pulleys or wheels, which hereby ensures that the string loop 3 can effortless run around the turning points.
- the lower turning point 11 is in this case shown as placed in a bearing 15.
- the lower turning point 11 may be arranged as a pawl or a pin, around which the string loop can run.
- a tensioning device may likewise be arranged (not shown) in connection with the lower turning point, which is arranged for maintaining pre-stressing on the string loop, so that this is always stretched.
- the tensioning device may for instance be a spring.
- the upper driving means 10 is in this embodiment further arranged in an insertion part 16.
- a handle 12 is arranged on the string loop 3 and is movable between the upper 10 and the lower 11 turning point, and is arranged so that by movement of the handle 12 the slats 6 are tilted until a predetermined angle.
- the handle 12 is in this embodiment arranged on the string loop 3 by means of a push part 13.
- the handle 12 may within the scope of the invention be arranged on the string loop in many different ways, among these fastened by gluing, welding, riveting or by means of a screw-locking, squeezing devices or locking-pawls, which grasp around the string loop .
- the above mentioned tensioning device (not shown) be arranged in connection with the handle 12, whereby it is obtained, that the string loop in expedient manner are giving pre- stress.
- a gear system 14 may be arranged between the driving means 10 and the shaft 8.
- the gearing scale between the shaft 8 and the driving means 10 can preferably be 1:2, 1:4 or 1:8.
- the driving means 10 com- prises a gearwheel (not shown) , which is arranged for transferring of movement of the handle 12 for rotation of the shaft 8.
- the gear system 14 can in an advantageous way become incorporated via the gearwheels, by for instance having another number of teeth on gearwheel of the shaft 8 relative to the number of teeth on the gear wheel of the driving means 10, which will be appreciated by a person skilled in the art.
- the string loop may either be in direct engagement with the teeth on the gearwheel or be in indirectly by further gearwheels.
- a carrier (not shown) is arranged in connection with the shaft 8 and follows the rotation of the shaft 8 between two permanently defined end positions (not shown) , which are determined by the predetermined angle.
- the function of the carrier will be disclosed closer below in connection with Fig. 4.
- tip arms 17 are available, which are further connected with the discon- necting mechanism 18 which are intended for disconnecting the handle 12 from the slats 6 at the predetermined angle, so that continuous movement of the handle 12 in the same direction occurs without tilting of the slat 6. It is here a question of that the disconnecting mechanisms
- FIG. 3 another embodiment of the system 7 according the present invention is shown in a exploded projection, for tilting a number of slats 6 in a screening device.
- the system comprises a shaft 8, which is connected to the slats 6 and transfers rotation for tilting of the slats 6 until a predetermined angle.
- the shaft 8 is in connection with the slats via the tip strings 9.
- the rotation of the shaft 8 is performed via movement of a string loop 3, which extends between an upper 10 and a lower 11 turning point, where the upper turning point 10 is arranged as a driving means.
- a handle 12 is arranged on the string loop 3 via a pushing pawl 13 and is movable between the upper 10 and the lower 11 turning point.
- the carrier 19 is arranged in connection with the shaft and follows the rotation of the shaft between two permanently defined end positions, in this embodiment only one end position 20 is shown, which is determined by the predetermined angle.
- the carrier 19 follows the rotation of the shaft 8 between two permanently defined end positions 20.
- the shaft 8 can not be rotated further in that direction, whereby the tilting of the slats 6 is stopped.
- the disconnecting mechanism is put in force, so as the disconnecting mechanism disconnects the handle 12 from the slats 6, so that a continuous movement in the same direction of the handle 12 occurs without tilting of the slats 6.
- a unintended pull in the handle 12 does not damage the system 7 when the carrier 19 engages with the permanently end position 20.
- the disconnecting mechanism is in this embodiment arranged in connection with the driving means 10.
- the driving means 10 is in this case designed so that it by rotation via movement of the handle 12 transfers rotation to the shaft 8 via the friction existing between them.
- the driving means 10 comprises a spring (not shown) , which is arranged to hold the driving means in engagement with the shaft 8 or a part there in between.
- the spring is arranged to press the driving means 10 towards the shaft 8, so that a greater friction between these occurs, whereby a dependable system is obtained.
- the disconnecting mechanism may be arranged to disconnect, when the frictional force between the string loop and the upper turning point is less than the force, which is applied to the handle.
- the shaft will rotate via the fric- tional force, which is present between the string loop and the upper turning point.
- the upper turning point or driving means may be arranged in directly permanently connection with the shaft, or it may be the case that a gearwheel is arranged on both the driving means and the shaft so that the rotation is transferred via the same.
- the construction plane of the string loop can be arranged with friction increasing means, such as teeth or a granulated surface.
- Fig. 4 shows in perspective a further embodiment of the disconnecting mechanism 21 according to the present invention.
- the disconnecting mechanism 21 comprises a spring 23, which is wound around the shaft.
- the spring 23 is in this case shown with a plurality of windings, but can likewise advantageously consist of only one winding,
- the ends of the spring 23 constitute a first 24 and second 27 carrier, respectively, so that the spring 23 and the carriers 24, 27 follow the rotation of the shaft between the end positions.
- the grasp of the spring around the shaft is released, so that the shaft rotates without the following of the spring 23 and the carriers 24, 27.
- a cap 28 is arranged around the shaft, so as that the spring force with which the spring 23 presses, is absorbed by the cap. It is hereby obtained that the shaft is not subjected to an disadvantageous wear by the spring.
- a tip arm 26 is arranged, where upon the tip strings are arranged. By rotation of the cap 28 and with it the spring 23 the slats are tilted via the tip strings.
- the disconnecting mechanism 21 may in an advantageous way be arranged in connection with the shafts, preferably be- tween the shaft and the slats.
- the spring may be designed so as to apply a spring force between the shaft and the driving means or to a intervening part for hereby increasing the friction in between.
- the spring may be designed as a plate spring, a disc spring or a coil spring, which will be appreciated by a person skilled in the art .
- the carrier has been designed as a part extending from the shaft, an arm, and it may be a part, which grasps around the shaft, a cap. Common for the carriers is that they rotate with the shaft between two permanently defined end positions .
- this type of screening devices also comprises sys- tems (not shown) arranged to collect and separate the slats, so that the slats may be raised, to ensure that the whole opening of the building is free from the screening device .
- sys- tems (not shown) arranged to collect and separate the slats, so that the slats may be raised, to ensure that the whole opening of the building is free from the screening device .
- a further known system for raising of slats which could advantageously be implemented by the present invention is a so-called H-string raising system, which is disclosed further in US-6,338,378, which hereby is incorporated by reference in the application.
- the screening device according to the present invention may in an appropriate way be used in openings of buildings, such as doors, windows, inside windows and fronts.
- the embodiment may with advantage also be used as a room divider inside the actual building.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Blinds (AREA)
- Threshing Machine Elements (AREA)
- Discharge Of Articles From Conveyors (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA200201439 | 2002-09-26 | ||
DK200201439 | 2002-09-26 | ||
PCT/DK2003/000612 WO2004029397A1 (en) | 2002-09-26 | 2003-09-22 | A system for tilting a number of slats in a screening device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1552102A1 true EP1552102A1 (en) | 2005-07-13 |
EP1552102B1 EP1552102B1 (en) | 2011-08-24 |
Family
ID=32039056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03798080A Expired - Lifetime EP1552102B1 (en) | 2002-09-26 | 2003-09-22 | A system for tilting a number of slats in a screening device |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1552102B1 (en) |
CN (1) | CN100473802C (en) |
AT (1) | ATE521783T1 (en) |
AU (1) | AU2003266204A1 (en) |
DK (1) | DK1552102T3 (en) |
PL (1) | PL214043B1 (en) |
WO (1) | WO2004029397A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009149710A1 (en) * | 2008-06-10 | 2009-12-17 | Vkr Holding A/S | Screening arrangement with a rotatory member accommodating a tilt cord |
WO2009149707A1 (en) * | 2008-06-10 | 2009-12-17 | Vkr Holding A/S | Screening device with a sliding mechanism for tilting slats |
EP2307652B1 (en) * | 2008-06-10 | 2014-06-04 | VKR Holding A/S | Screening device with a locking mechanism for a tilt device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2557978A (en) * | 1945-12-28 | 1951-06-26 | Elza L Krumm | Enclosed venetian blind |
DK105433C (en) * | 1962-12-22 | 1966-09-26 | Rasmussen V B K | Maneuvering device for blinds and similar blinds. |
DE4418735C2 (en) * | 1994-05-28 | 1997-11-27 | Benthin Ag | Device for manually actuating a blind, preferably a vertical blind |
US5645685A (en) * | 1996-01-05 | 1997-07-08 | Furhman; Thomas C. | Venetian blinds |
US5996668A (en) * | 1998-08-14 | 1999-12-07 | Odl, Incorporated | Adjustable blind assembly |
-
2003
- 2003-09-22 WO PCT/DK2003/000612 patent/WO2004029397A1/en not_active Application Discontinuation
- 2003-09-22 EP EP03798080A patent/EP1552102B1/en not_active Expired - Lifetime
- 2003-09-22 AU AU2003266204A patent/AU2003266204A1/en not_active Abandoned
- 2003-09-22 PL PL374715A patent/PL214043B1/en unknown
- 2003-09-22 DK DK03798080.2T patent/DK1552102T3/en active
- 2003-09-22 AT AT03798080T patent/ATE521783T1/en not_active IP Right Cessation
- 2003-09-22 CN CNB038226227A patent/CN100473802C/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2004029397A1 * |
Also Published As
Publication number | Publication date |
---|---|
PL374715A1 (en) | 2005-10-31 |
CN100473802C (en) | 2009-04-01 |
PL214043B1 (en) | 2013-06-28 |
AU2003266204A1 (en) | 2004-04-19 |
EP1552102B1 (en) | 2011-08-24 |
CN1685128A (en) | 2005-10-19 |
WO2004029397A1 (en) | 2004-04-08 |
ATE521783T1 (en) | 2011-09-15 |
DK1552102T3 (en) | 2011-11-14 |
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