EP0372803B1 - Drive mechanism for venetian blind - Google Patents
Drive mechanism for venetian blind Download PDFInfo
- Publication number
- EP0372803B1 EP0372803B1 EP89312388A EP89312388A EP0372803B1 EP 0372803 B1 EP0372803 B1 EP 0372803B1 EP 89312388 A EP89312388 A EP 89312388A EP 89312388 A EP89312388 A EP 89312388A EP 0372803 B1 EP0372803 B1 EP 0372803B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- venetian blind
- housing
- drive
- gear train
- drive shaft
- 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
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 17
- 239000011324 bead Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- E06B9/307—Details of tilting bars and their operation
-
- 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
- E06B2009/285—Means for actuating a rod (being tilt rod or lift rod)
Definitions
- the present invention relates to venetian blinds and drive mechanisms therefor.
- venetian blinds are formed with a headrail, usually of channel cross-section, in which is mounted an operating mechanism controlled by a longitudinally extending drive shaft.
- This drive shaft may be used to raise and lower the slats of the blind and/or may be used to tilt the slats.
- the drive shaft is itself driven usually via a gear box which may be controlled, for example, by a bead chain or by a rotatable wand.
- a venetian blind including a head rail, a drive shaft for raising and lowering the slats of the blind, a drive gear mechanism for rotating said drive shaft, said drive gear mechanism comprising a housing, means to mount the housing on the exterior of a venetian blind head rail, the rear face of the housing being engageable with said head rail, a manually operable drive member mounted for rotation in said housing, a driven shaft extending rearwardly outwardly of said housing and an epicyclic gear train operatively connected between said drive member and said driven shaft and a direction changing gear train, such as a bevel gear train, connecting the driven shaft of the drive mechanism to the drive shaft of the venetian blind.
- the epicyclic gear train can be made very compact and can give a substantial gear reduction to make operation of the blind easy.
- the housing has formed internally thereof, the ring gear of an epicyclic gear train.
- the planet carrier of the epicyclic gear train including a bearing for the drive member which may be in the form of a bead chain pulley.
- the direction changing gear train such as the bevel gear train, can include a braking means for holding the blind in a raised position.
- FIG. 1 there is illustrated therein one embodiment of venetian blind according to the present invention, including a headrail 10, a bottom rail 12 supported by lift cords 14 and a plurality of slats 16 supported by ladder means 18.
- Conventional raising and tilting mechanisms 20 are provided for raising and lowering the bottom rail 12 and for lifting the slats 16; these mechanisms are shown provided with a cover 22 and are themselves rotated by a drive shaft 24.
- Rotation of the drive shaft 24 is effected by a drive mechanism 26.
- the drive shaft includes a central screwthreaded spindle 28 carrying end stops 30 and 32 and a translating nut element 34, the elements 28 to 34 being utilized to control the amount of raising and lowering of the blind in a manner with which the present invention is not concerned.
- the drive mechanism indicated with the general reference numeral 26, includes a housing 36 having, adjacent its lower rear edge, a rearwardly extending finger 38 and adjacent its upper rear edge a rearwardly extending hook 40.
- the hook 40 can be engaged over the bead 42 of the front flange 44 of the headrail 10 and the finger 38 can be secured by a self tapping screw 46 engaged in a hole in the web portion 48 of the headrail 10 to hold the housing 36 on the front of the headrail 10.
- An inner surface of the housing 36 is formed with a ring gear 50 of an epicyclic gear train indicated by the general reference numeral 52.
- This gear train includes a planet carrier 54 mounted for rotation on a stub shaft 56.
- the planet carrier has three rotatably mounted planet gears 58 thereon, which mesh with the ring gear 50 and also mesh with a sun gear 60.
- This sun gear itself is journalled on a driven shaft 62 integral with the planet carrier 54.
- the sun gear is formed integrally with a bead chain pulley 64 carrying a manually operable bead chain 66, ( Figure 1).
- the driven shaft 62 has a hexagonal end portion 68 engageable in a direction changing gear train 70 as seen in Figure 1.
- Such a structure is very compact and provides an efficient gear reduction ratio, for example of 3 to 1, so that the blind can be operated in an easy manner.
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)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Shutters For Cameras (AREA)
- Magnetically Actuated Valves (AREA)
- Building Awnings And Sunshades (AREA)
Abstract
Description
- The present invention relates to venetian blinds and drive mechanisms therefor.
- Traditionally venetian blinds are formed with a headrail, usually of channel cross-section, in which is mounted an operating mechanism controlled by a longitudinally extending drive shaft. This drive shaft may be used to raise and lower the slats of the blind and/or may be used to tilt the slats. The drive shaft is itself driven usually via a gear box which may be controlled, for example, by a bead chain or by a rotatable wand.
- In relatively narrow venetian blinds using reduced dimensioned headrails, gear boxes to reduce the effort in raising and lowering the blind are not readily available, so it has been customary with such small headrail systems to revert to a crank rod to operate the winding mechanism. One problem with such a crank drive is that it looks inappropriate on a blind having such slender dimensions and it would be very desirable to be able to use a ball cord or a ball chain as an operating element.
- It is now proposed, according to the present invention, to provide a venetian blind including a head rail, a drive shaft for raising and lowering the slats of the blind, a drive gear mechanism for rotating said drive shaft, said drive gear mechanism comprising a housing, means to mount the housing on the exterior of a venetian blind head rail, the rear face of the housing being engageable with said head rail, a manually operable drive member mounted for rotation in said housing, a driven shaft extending rearwardly outwardly of said housing and an epicyclic gear train operatively connected between said drive member and said driven shaft and a direction changing gear train, such as a bevel gear train, connecting the driven shaft of the drive mechanism to the drive shaft of the venetian blind.
- The epicyclic gear train can be made very compact and can give a substantial gear reduction to make operation of the blind easy.
- In a preferred construction the housing has formed internally thereof, the ring gear of an epicyclic gear train. A further improvement in the efficiency can be achieved by the planet carrier of the epicyclic gear train including a bearing for the drive member which may be in the form of a bead chain pulley. With this arrangement, the bead chain pulley and the driven shaft both rotate in the same rotational sense, while the difference in rotational speed is less than it would have been if the chain wheel had been journalled on a fixed shaft. In this way certain friction losses are thus reduced.
- If desired, the direction changing gear train, such as the bevel gear train, can include a braking means for holding the blind in a raised position.
- In order that the present invention may more readily be understood, the following description is given, merely by way of example, reference being made to the accompanying drawings in which:-
- Figure 1 is a perspective view of one embodiment of venetian blind according to the present invention;
- Figure 2 is an enlarged cross-section to the headrail of the blind showing the drive gear mechanism; and
- Figure 3 is a schematic exploded view of the drive gear mechanism of Figure 2.
- Referring first to Figure 1, there is illustrated therein one embodiment of venetian blind according to the present invention, including a
headrail 10, abottom rail 12 supported bylift cords 14 and a plurality ofslats 16 supported by ladder means 18. Conventional raising andtilting mechanisms 20 are provided for raising and lowering thebottom rail 12 and for lifting theslats 16; these mechanisms are shown provided with acover 22 and are themselves rotated by a drive shaft 24. - Rotation of the drive shaft 24 is effected by a
drive mechanism 26. The drive shaft includes a central screwthreadedspindle 28 carrying end stops 30 and 32 and a translatingnut element 34, theelements 28 to 34 being utilized to control the amount of raising and lowering of the blind in a manner with which the present invention is not concerned. - If reference is now made to Figures 2 and 3, the drive mechanism, indicated with the
general reference numeral 26, includes ahousing 36 having, adjacent its lower rear edge, a rearwardly extendingfinger 38 and adjacent its upper rear edge a rearwardly extendinghook 40. Thehook 40 can be engaged over thebead 42 of thefront flange 44 of theheadrail 10 and thefinger 38 can be secured by aself tapping screw 46 engaged in a hole in theweb portion 48 of theheadrail 10 to hold thehousing 36 on the front of theheadrail 10. An inner surface of thehousing 36 is formed with aring gear 50 of an epicyclic gear train indicated by thegeneral reference numeral 52. This gear train includes aplanet carrier 54 mounted for rotation on astub shaft 56. The planet carrier has three rotatably mountedplanet gears 58 thereon, which mesh with thering gear 50 and also mesh with asun gear 60. This sun gear itself is journalled on a drivenshaft 62 integral with theplanet carrier 54. The sun gear is formed integrally with abead chain pulley 64 carrying a manuallyoperable bead chain 66, (Figure 1). - As can be seen again in Figures 2 and 3, the driven
shaft 62 has ahexagonal end portion 68 engageable in a direction changinggear train 70 as seen in Figure 1. - It will be appreciated, therefore, that in use, operation of the bead chain will cause the
pulley 64 to rotate, this rotating thesun gear 60. Theplanet gears 58 will be rotated thereby, because they mesh with thering gear 50, theplanet carrier 54 and therefore the drivenshaft bevel gear train 70. - Such a structure is very compact and provides an efficient gear reduction ratio, for example of 3 to 1, so that the blind can be operated in an easy manner.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89312388T ATE77126T1 (en) | 1988-12-06 | 1989-11-29 | DRIVE FOR ROLLER SHUTTERS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8828403A GB2225803B (en) | 1988-12-06 | 1988-12-06 | Drive mechanism for venetian blind |
GB8828403 | 1988-12-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0372803A1 EP0372803A1 (en) | 1990-06-13 |
EP0372803B1 true EP0372803B1 (en) | 1992-06-10 |
Family
ID=10647994
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89312388A Expired - Lifetime EP0372803B1 (en) | 1988-12-06 | 1989-11-29 | Drive mechanism for venetian blind |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0372803B1 (en) |
AT (1) | ATE77126T1 (en) |
AU (1) | AU617020B2 (en) |
DE (1) | DE68901764T2 (en) |
ES (1) | ES2032112T3 (en) |
GB (1) | GB2225803B (en) |
MY (1) | MY104287A (en) |
NZ (1) | NZ231620A (en) |
SG (1) | SG15693G (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2826400B1 (en) | 2001-06-26 | 2004-08-27 | Somfy | MANUAL BLIND DRIVE DEVICE INCLUDING AN EPICYCLOIDAL REDUCER |
GB2435289A (en) * | 2006-02-16 | 2007-08-22 | Nelson T Yang | Two way elevating curtain structure |
DE202008016005U1 (en) | 2008-12-01 | 2009-08-06 | Ortloff, Helene | Plastic gear motor |
DE102012001530A1 (en) * | 2012-01-27 | 2013-08-01 | Warema Renkhoff Se | Sun protection system with lamellar hanging |
CN105464571A (en) * | 2016-01-06 | 2016-04-06 | 南京二十六度建筑节能工程有限公司 | Pull bead external sunshade type integrated window |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB670935A (en) * | 1949-08-11 | 1952-04-30 | Levolor Lorentzen Inc | Venetian blind tilter construction |
DE3636855A1 (en) * | 1986-10-29 | 1988-05-11 | Wilhelm Rademacher | Reduction gear, particularly for installation in a belt case of a belt winding mechanism driven by an electric motor for a roller shutter or the like |
-
1988
- 1988-12-06 GB GB8828403A patent/GB2225803B/en not_active Expired - Fee Related
-
1989
- 1989-11-29 ES ES198989312388T patent/ES2032112T3/en not_active Expired - Lifetime
- 1989-11-29 EP EP89312388A patent/EP0372803B1/en not_active Expired - Lifetime
- 1989-11-29 DE DE8989312388T patent/DE68901764T2/en not_active Expired - Lifetime
- 1989-11-29 AT AT89312388T patent/ATE77126T1/en not_active IP Right Cessation
- 1989-12-04 NZ NZ231620A patent/NZ231620A/en unknown
- 1989-12-05 AU AU45920/89A patent/AU617020B2/en not_active Ceased
- 1989-12-05 MY MYPI89001698A patent/MY104287A/en unknown
-
1993
- 1993-02-11 SG SG156/93A patent/SG15693G/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE68901764T2 (en) | 1992-12-17 |
ATE77126T1 (en) | 1992-06-15 |
EP0372803A1 (en) | 1990-06-13 |
MY104287A (en) | 1994-02-28 |
ES2032112T3 (en) | 1993-01-01 |
AU4592089A (en) | 1990-06-14 |
GB2225803A (en) | 1990-06-13 |
AU617020B2 (en) | 1991-11-14 |
DE68901764D1 (en) | 1992-07-16 |
GB8828403D0 (en) | 1989-01-05 |
SG15693G (en) | 1993-04-16 |
GB2225803B (en) | 1992-08-05 |
NZ231620A (en) | 1991-08-27 |
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