EP1352148B1 - Electrical operator arrangement for a venetian blind - Google Patents

Electrical operator arrangement for a venetian blind Download PDF

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Publication number
EP1352148B1
EP1352148B1 EP02715372A EP02715372A EP1352148B1 EP 1352148 B1 EP1352148 B1 EP 1352148B1 EP 02715372 A EP02715372 A EP 02715372A EP 02715372 A EP02715372 A EP 02715372A EP 1352148 B1 EP1352148 B1 EP 1352148B1
Authority
EP
European Patent Office
Prior art keywords
motor
tilt
raising
raising cord
cord system
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.)
Expired - Lifetime
Application number
EP02715372A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1352148A1 (en
Inventor
Gert Godvig Lassen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VKR Holding AS
Original Assignee
VKR Holding AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VKR Holding AS filed Critical VKR Holding AS
Publication of EP1352148A1 publication Critical patent/EP1352148A1/en
Application granted granted Critical
Publication of EP1352148B1 publication Critical patent/EP1352148B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E06B9/303—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape
    • E06B9/308—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape with coaxial tilting bar and raising shaft
    • 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

Definitions

  • the present invention relates to an electrical operator arrangement for a venetian blind comprising operating members which are preferably situated in a top casing, a bottom bar connected to the operating members by means of a raising cord system, and a number of ladder cords connected to a tilt mechanism, said ladder cords being situated between the bottom bar and the operating members and carrying a number of slats, where said operator arrangement comprises a motor with a motor casing and a motor armature, where said motor is on one hand part of the tilt mechanism in such a manner that the tilt mechanism, by means of a tilt member, can tilt the slats in one direction or the other depending on the operating direction of the motor, and on the other hand constitutes a part of the raising cord system in such a manner that the bottom bar can be raised or lowered depending on the operating direction of the motor.
  • Fig. 1 a venetian blind with a bottom bar 1 and two raising cords 7, 8 is seen. Each raising cord's one end is connected to the lower side of the bottom bar 1, while its opposite end is connected to the upper side of the bottom bar 1.
  • the bottom bar 1 can be guided in not shown guide rails, which are mounted along frame sides in for instance a roof window where the venetian blind is mounted.
  • tilt system and raising cord system must be interpreted in the broadest possible sense, i.e. so that each of them comprises everything situated on the respective one or the other side of the air gap in the motor used for the operation.
  • the one raising cord 7 is lead downwards to a first member for change of direction situated at the lower part of the main window frame. From here the raising cord 7 is lead upwards along the window frame and around a driving pulley 13. In principle, the raising cords 7, 8 may be wound only half a turn round the driving pulley, but in practice, because of the transmission of power from the driving pulley 13 to the raising cords 7, 8 it is preferable to add one or more additional full windings. From the driving pulley 13 the raising cord 7 is lead down to a second member for change of direction 4 and horizontally to a third member for change of direction 57. From here the raising cord 7 is lead down to the bottom bar 1 and connected hereto. Depending on where the raising cord 7 is desired to be lead to the bottom bar 1, the distance which the raising cord is lead horizontally, can be varied.
  • the raising cord 7 will often be lead down in the vicinity of a ladder cord 3, which will be mentioned in greater detail later.
  • the raising cord 7 may, however, also be lead down in the vicinity of and along the window frame.
  • the guiding of the raising cord 8 is similar to that of the raising cord 7.
  • the other raising cord 8 from the bottom side of the bottom bar 1 is lead downwards to a member for change of direction 28.
  • the raising cord 8 is lead upwards to the top casing, and by means of two members for change of direction 6a, 6b horizontally along said casing and vertically up to and around the driving pulley 13.
  • From the driving pulley 13 the raising cord 8 is guided down to the member for change of direction 4 and horizontally to a member for change of direction 58, from where the raising cord 8 is lead down to the bottom bar 1 and connected hereto.
  • the above-mentioned members for change of direction can have different embodiments, including wheels, pulleys or rollers. As it will appear from the further description, these do not have to be easy-running but may incorporate bearing friction or actually be blocked.
  • Each of the raising cords 7 and 8 forms, as it appears form the information given above, a closed loop from the top of the bottom bar 1 to the bottom of the bottom bar 1.
  • the bottom bar 1 can be raised or lowered by exercising a pulling force on the raising cords 7, 8 in the one or the other direction.
  • This pulling force on the raising cords 7, 8 is obtained by a reversible electric motor 12, for instance a DC motor, the motor armature of which in the shown embodiment is connected to the driving pulley 13 via a shaft.
  • the loops formed by the raising cords 7 and 8 are guided sufficiently tightly in order to obtain sufficient friction to enable the transmission of force between the raising cords 7 and 8 and the driving pulley 13.
  • the ladder cords have two side cords 3a, 3b each. Between these side cords 3a, 3b there are a number of rungs 3c, on which blind slats 18 are resting. For the sake of clarity, only one of these blind slats 18 is shown in fig. 1 .
  • the ladder cords 3 and the tilt members 9 are identical, they are provided with the same reference numbers, and the mode of operation will subsequently be described as if there were one only.
  • the two side cords 3a, 3b of a ladder cord 3 are in the top casing guided in either direction around a tilt member 9 in the form of a cylinder body and attached to this body. Depending on the diameter, the side cords may be wound several times in opposite directions, around the cylinder body before being attached thereto.
  • the tilt member 9 is in fixed connection with a shaft 16 which again is connected to the motor 12.
  • the shaft 16 is permanently connected to the casing of the motor 12.
  • the motor 12 is not in fixed connection with the top casing but is rotatably journalled by means of the two shafts, i.e. the shaft connected to the motor armature and the shaft 16 connected to the casing.
  • the shaft 16 is furthermore provided with a blocking member limiting the angle with which the shaft 16 may rotate relative to the top casing.
  • the blocking member comprises a first cogwheel 10 in fixed connection with the shaft 16, said cogwheel meshing with another cogwheel 11.
  • the other cogwheel 11 is journalled in such a manner on a shaft 19 that it is freely rotatable when not taking into account the meshing with the first cogwheel 10.
  • the shaft 19 is fixed relative to the top casing.
  • the other cogwheel 11 shows a discontinuity 20 in the cogging.
  • This discontinuity can for example be a missing tooth gap, or a tooth which is taller or wider than the others.
  • the motor 12 is, as mentioned, for instance a reversible DC motor where the direction of rotation of the motor armature relative to the casing is reversed by means of a reversal of the polarity of the supply voltage.
  • the expression direction of rotation of the motor will be used. This should be interpreted as the direction of the movement of the motor armature relative to the motor casing.
  • the electrical operating member can be for example a switch with three positions, i.e. a neutral disconnected centre position and two activation positions, one of which supplies the motor 12 with current of one polarity, and the other activation position supplies the motor 12 with current of the opposite polarity.
  • the motor 12 can be activated in the one or the other directions of rotation.
  • the switch is operated in such a manner that the motor 12 is supplied with current for the first direction of rotation, the motor armature rotates in the given direction of rotation relative to the motor casing.
  • the motor 12 is as mentioned not in fixed connection with the top casing, but rotatably journalled relative hereto. Therefore there is in principle provided for both that the motor casing remains stationary while the motor armature rotates, and the opposite situation, i.e. that the motor casing rotates while the armature remains stationary.
  • the operator arrangement is therefore designed in such a manner that the resistance, i.e. the friction and the inertia in the raising cord system 7, 8 with the members for change of direction 4, 6a, 6b, 27, 28, 57, 58, the winding of the cords 7, 8 around the driving pulley, the friction in the bearing 17 as well as the possible guiding of the bottom bar in guide rails, is considerably higher than the resistance from the tilt mechanism with the ladder cords 3 and the blocking members.
  • the cylinder 9 is turned in such a manner that one of the side cords 3a, 3b is would up on the cylinder while the other one is unwound. This achieves the tilt movement of the slats 18, because one of the side cords 3a, 3b is raised while the other one is lowered, such that the ladder rungs on which the slats 18 are resting, are tilted.
  • the cable 14 is designed in such a manner that the rotation of the motor casing is not obstructed.
  • this design consists of an adaptation of the length of the cable 14 to the maximum rotation of the motor casing, but the skilled person will understand that other designs can be used, such as for example collector shoes.
  • the current to the motor 12 is interrupted, when the bottom bar 1 is at the desired level.
  • a suitable ratio between the time available for setting a suitable tilt angel for the slats 18, and the time necessary for raising or lowering the blind can be obtained, without necessitating regulation of the motor current, and without having to use extra gearings in the transmissions between the motor 12 and the tilt mechanism or between the motor 12 and the driving pulley 13.
  • the embodiment shown in fig 2 has a slightly different raising cord system where the raising cords 7, 8 do not form closed loops, but end at the bottom bar 1.
  • these are wound around a coiling drum 71 which is preferably provided with an external thread, in which the raising cords 7, 8 are bedded during the winding.
  • One of these, namely the member for change of direction 6c is displaceable concurrently with the winding of the raising cords 6, 7, as indicated with a double arrow in fig. 2 .
  • the bearing 67 contributes with a rather large part of the total friction of the raising system.
  • Fig. 3 is a partial sectional drawing, i.e. the coiling drum 71 and the wound ladder cords 7, 8 are shown in sections, however, in order to facilitate the understanding of the function of the system, it is illustrated that the ladder cords 7, 8 are passing down on the face of the coiling drum seen relative to the drawing.
  • the locking arrangement comprises a bearing block 67, 67a, in which the motor shaft 65 is journalled.
  • This bearing has a built-in friction, such that the total resistance from friction and inertia, as it will be described later, is higher than the resistance in the tilt system.
  • a carrier 65a On the motor shaft a carrier 65a has been formed, where said carrier during rotation may partly influence a coil spring 63, partly influence another carrier 66, which is connected to a hollow coiling drum 71 to the raising cords 7, 8.
  • the other carrier 66 is fixed on a shaft with two shaft parts 64a, 64b.
  • the one shaft part 64a is journalled in a bore in the motor shaft 65 while the other shaft part 64b ends in a cogwheel 72 which is engaged with a suitable projection 73 situated on the inside of the coiling drum 71.
  • the carriers, springs and shafts of the locking arrangement are located in the hollow coiling drum 71 in such a manner that the total locking arrangement does not take up unnecessary space.
  • the motor casing is provided with blocking members in the form of a pair of arms 69, 70, in the form of for instance a couple of screws.
  • blocking members in the form of a pair of arms 69, 70, in the form of for instance a couple of screws.
  • other blocking members can be used as required, such as for example the ones illustrated in fig. 2 .
  • fig. 4 shows a section seen along the line IV-IV in fig. 3 .
  • the motor casing will, when the motor is supplied with current, be able to turn in the one or the other direction, as desired, since the friction between the bearing 67 and the motor shaft 65 is so high that it exceeds the total resistance met by the motor casing in the form of friction and inertia in the rest of the tilt system.
  • the motor shaft will thus remain in the same position, and the tilt system can therefore tilt the slats 18 between the two extreme positions where the blocking members enter into action.
  • the bearing block 67 is seen with a cylindrical part 67a. Concentrically in the cylindrical part 67a of the bearing block 67, there is provided a through bore, in which the motor shaft 65 is frictionally journalled. Centrally in the motor shaft 65, there is provided a bore which serves as bearing for another shaft 64. On the motor shaft 65 a carrier 65a is provided, and likewise on the shaft 64a, 64b a carrier 66 is provided.
  • These two carriers 65, 66 are arranged in such a manner that their rotational movement takes place on the same imaginary cylinder concentric to the motor shaft 65 and the cylindrical part 67a of the bearing block 67, and made in such a manner that via a coil spring 63 they are able to engage with each other form both sides depending on their relative direction of rotation.
  • a spring coil 63 is concentrically arranged on the cylindrical part 67a of the bearing block 67 as well as on both carriers 65a and 66 .
  • the spring coil 63 has radially deflected parts 630, 631 which are made to engage with the carriers 65a, 66.
  • the carrier 66 is influenced in a clockwise direction by gravity on the raising cords 7, 8 as shown with the arrow g.
  • the carrier 66 presses the radially deflected part 631 of the spring coil 63 in a clockwise direction which makes the spring coil 63 squeeze the cylindrical part 67a of the fixed bearing block 67.
  • This also efficiently keeps the shaft 64a, 64b in position and thus also the coiling drum 71, the raising cords 7, 8, the blind slats 18 and bottom bar 1 in a given position.
  • any of the situations shown in figs. 4a-4c will be stationary, as long as the tilt system has not reached one of its extreme positions, where it is blocked by the blocking means.
  • the blocking means enter into function at one of the extreme positions of the system, the rotation of the motor casing is blocked, and instead the motor shaft 65 and thus the engaging member 65a start rotating.
  • the engaging member 65a moves from the position shown in fig. 4a to the position shown in fig. 4b .
  • the carrier 65a presses the radially deflected part 630 of the spring coil 63 and thereby causes that said carrier is loosened relative to the cylindrical part 67a of the bearing block 67.
  • the spring 63 will start rotating relative to the cylindrical part 67a of the bearing block 67 under the influence of the motor torque transferred via the carrier 65a and gravity transferred via the carrier 66. All three parts, i.e. the two carriers 65a, 66 and the spring 63 will thus turn together while the slats of the blind 18 and the bottom bar 1 are lowered.
  • the motor shaft is again able to overcome the friction in the bearing block 67, and it will move from the position shown in fig. 4b through the position shown in fig. 4a to the one shown in fig. 4c .
  • the carrier 65a presses on the second one of the radial deflections 631 of the spring coil 63, and thereby loosens the spring coil 63 in the same way as it did in the opposite direction by means of the first deflection 630.
  • the carrier 65a squeezes the carrier 66 via the deflection 631 and thereby raises the blind slats 18 and the bottom bar 1 against gravity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
EP02715372A 2001-01-16 2002-01-15 Electrical operator arrangement for a venetian blind Expired - Lifetime EP1352148B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK200100066 2001-01-16
DKPA200100066 2001-01-16
PCT/DK2002/000024 WO2002057586A1 (en) 2001-01-16 2002-01-15 Electrical operator arrangement for a venetian blind

Publications (2)

Publication Number Publication Date
EP1352148A1 EP1352148A1 (en) 2003-10-15
EP1352148B1 true EP1352148B1 (en) 2009-09-30

Family

ID=8160022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02715372A Expired - Lifetime EP1352148B1 (en) 2001-01-16 2002-01-15 Electrical operator arrangement for a venetian blind

Country Status (7)

Country Link
EP (1) EP1352148B1 (zh)
CN (1) CN1208541C (zh)
AT (1) ATE444432T1 (zh)
DE (1) DE60233860D1 (zh)
DK (1) DK1352148T3 (zh)
ES (1) ES2334334T3 (zh)
WO (1) WO2002057586A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1435426B1 (en) * 2002-12-30 2010-06-16 Ober S.r.l. Apparatus for adjusting the position of the slats of Venetian blinds and Venetian blind
GB2440740B (en) * 2006-08-09 2009-02-25 Ke-Min Lin An adjustable structure for adjusting the angle and the rise and fall of curtain blades

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK158054C (da) * 1985-01-10 1990-08-20 Rasmussen Kann Ind As Elektrisk drivarrangement for persienne
WO1996027727A1 (en) * 1995-03-06 1996-09-12 Norbert Marocco Combined tilt and raise control for window coverings
EP1052365B1 (en) * 1999-05-11 2004-12-29 Hunter Douglas Industries B.V. Operating mechanism for a venetian blind

Also Published As

Publication number Publication date
CN1486393A (zh) 2004-03-31
DK1352148T3 (da) 2009-12-21
DE60233860D1 (de) 2009-11-12
WO2002057586A1 (en) 2002-07-25
EP1352148A1 (en) 2003-10-15
ES2334334T3 (es) 2010-03-09
ATE444432T1 (de) 2009-10-15
CN1208541C (zh) 2005-06-29

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