EP0600134A1 - Dispositif de blocage de cordon - Google Patents

Dispositif de blocage de cordon Download PDF

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Publication number
EP0600134A1
EP0600134A1 EP92311076A EP92311076A EP0600134A1 EP 0600134 A1 EP0600134 A1 EP 0600134A1 EP 92311076 A EP92311076 A EP 92311076A EP 92311076 A EP92311076 A EP 92311076A EP 0600134 A1 EP0600134 A1 EP 0600134A1
Authority
EP
European Patent Office
Prior art keywords
cord
headrail
brake wheel
slats
drum
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.)
Withdrawn
Application number
EP92311076A
Other languages
German (de)
English (en)
Inventor
William H. Rapp
Ira Gaber
Cooper Coolidge Woodring
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.)
Nien Made Enterprise Co Ltd
Original Assignee
Nien Made Enterprise Co Ltd
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 Nien Made Enterprise Co Ltd filed Critical Nien Made Enterprise Co Ltd
Priority to EP92311076A priority Critical patent/EP0600134A1/fr
Publication of EP0600134A1 publication Critical patent/EP0600134A1/fr
Withdrawn legal-status Critical Current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
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/324—Cord-locks

Definitions

  • the present invention relates to lifter for Venetian blind, particularly a cord-lock mechanism to support slats, take up or release a lift cord to raise or lower slats.
  • Each Venetian blind is composed of a plurality of vertical or horizontal slats running in parallel, tilting of which can adjust indoor darkness and preserve confidence in personal living. It is being extensively used in offices and homes.
  • the conventional horizontal Venetian blind being used can have its slats tilted and lifted, and comprises mainly a rectangular sectioned and non-rotary headrail, a foot rail, two or more ladders each including an outer ladder and an inner ladder suspending from the headrail to the foot rail to support a plurality of slats with a plurality of connecting tapes located between the outer and inner ladders, a tilter within the headrail and a transmission device therefor to tilt the slats, and a lifter to raise and lower the slats.
  • the lifter is incorporated with a lift cord, at least two wires extending from the headrail to the foot rail and connected to the lift cord, and a pulley set.
  • the pulley set causes the wires tied to the foot rail to displace upward simultaneously to raise the foot rail as well as all or part of the slats, and consequently cause the lower slats to close to the upper slats.
  • the conventional lifter for Venetian blind is quite complicated in structure. Hence, its production cost is high. Moreover, it is hardly to implement mass production with automatic assembly process, and it indeed has the following defects:
  • the present invention provides a simple and easy-to-operate cord-lock mechanism for Venetian blind with minimum failure possibility. It can rotate headrail of the blind directly, and effectively simplify the components required in both the tilter and lifter of Venetian blind.
  • the tilter mechanism according to the present invention comprises a hollow drum secured to window frame or door frame, an end cover, a pulley block fixed within the drum, a pulley installed at the pulley block, a brake wheel linearly movable within a guide channel at the pulley block, and a lift cord made of soft material.
  • Both ends of the lift cord are led to pass through the brake wheel and the pulley, and then passed through two outlet at the two drums located at two ends of the headrail, extended downward and tied to two cord holders at two ends of the tubular foot rail.
  • the cord holders are identical to the ladder holders.
  • the cord holders and the ladder holders are interchangeable.
  • the main object of the present invention is to provide a cord-lock mechanism for Venetian blind with minimum components and simple structure without any transmission shaft. It is a design that permits mass production with automatic assembly process at low production cost.
  • Another object of the present invention is to provide a cord-lock mechanism which can be installed at either end of the headrail to satisfy different user's habit and different indoor installation requirements.
  • Another object of the present invention is to provide cord-lock mechanism for Venetian blind which permits efficient and prompt retraction and extension of slats, assures easy operation, long service life and minimum failure possibility in comparison with the conventional tilter.
  • Another object of the present invention is to provide a cord-lock mechanism for Venetian blind to be supplied to the general consumers in the form of a "DIY" kit to permit assembly and replacement of slats by the consumers.
  • the cord-lock mechanism (20) according to the present invention can be installed at either end of the headrail (11), and permits free rotation of the headrail (11). Therefore, the Venetian blind (10) incorporated with the cord-lock mechanism (20) according to the present invention can have its headrail rotated directly by the tilter mechanism (19) shown in Fig. 4. Rotation of the headrail (11) can cause the inner ladder tape (14) and the outer ladder tape (15) to perform vertical movement linearly in two opposite directions, and consequently the slats (90) are tilted accordingly without any worm drive, long transmission, gear and other sophisticated mechanism. Hence, the overall structure of the blind (10) is effectively simplified.
  • the tilter (19) includes a hollow drum (21) with an end cover (23), and is fixed to a window frame (93).
  • the lifter (20) also includes a hollow drum (22) with an end cover (24) of exactly the same shape fixed to the window frame (93).
  • Each of the drums (21 and 22) has a pair of upward extended ribs (25 and 26), and each of the end covers (23 and 24) has a cross slot (27 or 28).
  • Each of the drums (21 and 22) can be easily secured to a side of the window frame (93) with the extended ribs (25 and 26) or the cross slot (27 or 28) in association with two conventional fasteners (29 and 30).
  • the tubular headrail (11) which is designed with a size corresponding to the width of the window frame (93), is freely rotatably suspended between the drums (21 and 22). As shown in Fig.
  • the cord-lock mechanism (20) includes two pull cords (17a and 17b) extending from the headrail (11) to the foot rail (12) and substantially connected to a lift cord (18) for lifting and lowering of the slats (90) outside the blind (10).
  • the lift cord (18) is pulled, the pull cords (17a and 17b) are taken up or released synchronously to lift or lower the foot rail (12) so that the slats (90) are displaced upward and overlaid in sequence to close the blind (10), or the slats (90) are separated to open the blind (10) with slats (90) arranged in equal intervals.
  • the cord-lock mechanism (20) to raise or lower the slats (90) comprises mainly a hollow drum (22) secured to a window frame (93) and an end cover (24) to cover the drum (22).
  • the shape and structure of the drum (22) and the end cover (24) are exactly identical to the drums (21) and the end cover (23) for the tilter mechanism (19).
  • the cord-lock mechanism (20) further includes a pulley block (48) fixed within the drum (22), a pulley (49) attached to the pulley block (48), a brake wheel (51) with teeth-like pattern engraved on its surface and displaced linearly upward and downward within a guide channel (50) at the pulley block (48), and a pair of L-like fixing elements (54 and 55) at two sides above the guide channel (50), each has a round corner at its turning point to prevent from wearing of the lift cord (18) as well as the pull cords (17a and 17b).
  • the drum (22) can be secured to either end, and hence it is designed with a cord outlet (41) in the middle of its bottom side, and two symmetric cord outlets (42 and 43), one at the left side and the other at the right side. As shown in Fig. 1, both ends of the tilt cord (37) are extended out of the drum (22) through either the cord outlet (42) or another cord outlet (43) so that an end of the lift cord (37) can be pulled indoors and consequently the raise or lower the slats (90).
  • the drum (22) has a connecting section (45) composed of a plurality of elastic connecting elements (44) arranged annularly in equal distance near an end of the tubular headrail (11).
  • Each elastic connecting element (44) has a wedged end (46) extending outward.
  • Fig. 6 there are two symmetric slide ways (52 and 53) on the inner wall of the drum (22), one at the left side and the other at the right side for the pulley block (48) to select either of them and to decline inward for about 45 degree so as to engage with the slide way (52 or 53) selected, and to align the pulley block with the cord outlet (42 or 43).
  • the ends of the lift cord (18) is, after passing through the brake wheel (51) and the pulley (49) or the L-like fixing elements (54), the pull cords (17a and 17b) at such ends are extended respectively toward to the drums (21 and 22) at two opposite ends of the tubular headrail (11), and then passing through the middle cord outlet of each drum (21 or 22), extended downward and tied to the respective ends of the tubular foot rail (12).
  • the brake wheel (51) when the lift cord (18) is suspended naturally, the brake wheel (51), with its own weight, is displaced downward to a release position at the bottom of the guide channel (50) to permit downward pulling of the lift cord (18) so that the pull cords (17a and 17b) are displaced synchronously to raise the foot rail (12) and consequently bring the slats (90) together so that the slats (90) are at nearly closing condition.
  • the pull cords (17a and 17b) and the tubular foot rail (12) are displaced downward by the weight of the slats (90) and the foot rail (12) so that the slats are fully opened at equal distance.
  • the lift cord (18) is pulled outward in the direction shown by the arrow A after a downward pulling force is applied to raise the slats (9) in order to force the brake wheel (51) to subject to an upward component force and displace to a braking position on the top of the guide channel (50).
  • the cord-lock mechanism permits the headrail to rotate freely, and does not requires such sophisticated components such as worm drive, long transmission shaft, gear trains, etc. Number of components required is decreased effectively, structure is simplified, production cost is lowered, and mass production with automatic assembly process is feasible. Moreover, it can be installed at either side of the headrail to satisfy the user's habit or environmental requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
EP92311076A 1992-12-04 1992-12-04 Dispositif de blocage de cordon Withdrawn EP0600134A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92311076A EP0600134A1 (fr) 1992-12-04 1992-12-04 Dispositif de blocage de cordon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92311076A EP0600134A1 (fr) 1992-12-04 1992-12-04 Dispositif de blocage de cordon

Publications (1)

Publication Number Publication Date
EP0600134A1 true EP0600134A1 (fr) 1994-06-08

Family

ID=8211572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92311076A Withdrawn EP0600134A1 (fr) 1992-12-04 1992-12-04 Dispositif de blocage de cordon

Country Status (1)

Country Link
EP (1) EP0600134A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463791A (en) * 1983-01-24 1984-08-07 Marathon Manufacturing Company Venetian blind cord lock for up to eight lift cords
US4651795A (en) * 1986-03-21 1987-03-24 Beatrice Foods Pleated fabric window covering cord lock
US4719956A (en) * 1985-03-22 1988-01-19 Beatrice Companies Adjustable window covering cord lock
NL9002161A (nl) * 1990-10-04 1992-05-06 Dutra B V Rolgordijn en een wikkeleenheid daarvoor.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463791A (en) * 1983-01-24 1984-08-07 Marathon Manufacturing Company Venetian blind cord lock for up to eight lift cords
US4719956A (en) * 1985-03-22 1988-01-19 Beatrice Companies Adjustable window covering cord lock
US4651795A (en) * 1986-03-21 1987-03-24 Beatrice Foods Pleated fabric window covering cord lock
NL9002161A (nl) * 1990-10-04 1992-05-06 Dutra B V Rolgordijn en een wikkeleenheid daarvoor.

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Effective date: 19941209