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
  • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives

Definitions

• a pulling cord device for Venetian blinds and the like is
• the invention relates to a mechanism in a toprail for an actuating cord for Venetian blinds and the like comprising a driven cord pulley and friction reducing means at the exit of the cord from the mechanism.
• This is obtained in a construction which is particular in that the ends of the cord exit from the mechanism at the top side of two pulleys which are fitted to one and the same shaft which is parallel to the top rail, in which one pulley is mounted freely rotatable on the shaft and the other pulley is fixed to the shaft, in which there is fitted between the two pulleys a freely rotatable third pulley on a shaft perpendicular to the shaft in the top rail.
• the direct pull is used in the fixed pulley for lifting of the Venetian blind or roller blind, and that a pull in the other end of the cord is used for the lowering requiring less force. In this manner a further reduction occurs in the difference between pulling forces.
• Fig. 1 shows a housing for the mechanism according to the invention with two cords in a three-dimensional representation
• Fig. 2 shows the mechanism from behind in a similar three- dimensional representation.
• a housing 1 which contains a shaft 2 and two pulleys 3 and 4, around which are wrapped two ends 5 and 6 of a cord.
• the cord is a ball chain, i.e. a thin and flexible cord with spheres cast around it at a fixed distances.
• the housing 1 is fitted into a top rail which is not shown, which is provided with openings for the cord ends 5 and 6 next to each other.
• the shaft 2 is connected to the further mechanism which acutates a roller blind, a folding blind, a Venetian blind or a similar screening device.
• the pulley 3 is fitted non-rotatably to the shaft 2, and a pull on the end 5 of the cord hence causes rotation in one direction (in the figure counterclockwise) of the shaft 2.
• Fig. 2 the parts fitted into the housing are seen from behind, and it is seen that the ball chain has been placed around both pulleys as well as around a "reversing pulley" 7 fitted therebetween.
• This reversing pulley has its axis perpendicular to the shaft 2 and has the purpose to ensure that a pull in the end 6 of the cord is transmitted as a rotation in the opposite direction of the pulley 3 and hence the shaft 2.
• a further function of the reversing pulley is to increase the amount of wrap around the pulley 3, which is important for the transmission of forces in case a thick cord without spheres is used for the actuation.
• the pulley 4 is freely rotatable on the shaft 2. However, the friction may be further reduced and still further stability is obtained by an independent bearing for the pulley 4.

Landscapes

• Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Blinds (AREA)
• Catching Or Destruction (AREA)
• Laminated Bodies (AREA)
• Pulleys (AREA)
• Noodles (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=8088853

Family Applications (1)

Country Status (7)

Families Citing this family (2)

Family Cites Families (2)

• 1998
  • 1998-01-09 DK DK199800021A patent/DK2198A/da not_active Application Discontinuation
• 1999
  • 1999-01-11 EP EP99900443A patent/EP1045955B1/de not_active Expired - Lifetime
  • 1999-01-11 WO PCT/DK1999/000013 patent/WO1999037874A1/en not_active Ceased
  • 1999-01-11 AT AT99900443T patent/ATE285019T1/de not_active IP Right Cessation
  • 1999-01-11 DE DE69922632T patent/DE69922632D1/de not_active Expired - Fee Related
  • 1999-01-11 AU AU19606/99A patent/AU752194B2/en not_active Expired
• 2000
  • 2000-07-07 NO NO20003504A patent/NO317007B1/no not_active IP Right Cessation

Non-Patent Citations (1)

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