EP1498570A1 - Klemmwickelfedervorrichtung zur Meidung einer Rückwärtsbewegung und Fensterrollo mit einer solchen Vorrichtung - Google Patents

Klemmwickelfedervorrichtung zur Meidung einer Rückwärtsbewegung und Fensterrollo mit einer solchen Vorrichtung Download PDF

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Publication number
EP1498570A1
EP1498570A1 EP03018245A EP03018245A EP1498570A1 EP 1498570 A1 EP1498570 A1 EP 1498570A1 EP 03018245 A EP03018245 A EP 03018245A EP 03018245 A EP03018245 A EP 03018245A EP 1498570 A1 EP1498570 A1 EP 1498570A1
Authority
EP
European Patent Office
Prior art keywords
shaft
spiral spring
output shaft
tubular
base frame
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Withdrawn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
EP03018245A
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English (en)
French (fr)
Inventor
Ming Nien
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
Publication of EP1498570A1 publication Critical patent/EP1498570A1/de
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/68—Operating devices or mechanisms, e.g. with electric drive
    • 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
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/90—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for immobilising the closure member in various chosen positions
    • E06B2009/905—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for immobilising the closure member in various chosen positions using wrap spring clutches

Definitions

  • the present invention relates generally to window coverings and, more specifically, to an anti-reverse transmission apparatus for use in a lifting window blind (for example, a Venetian blind, roller blind, etc.) to let the user's biasing force be smoothly transmitted to the linking rod to lift or lower the blind body and, to prohibit reverse transmission of biasing force produced due to the gravity weight of the blind body.
  • a lifting window blind for example, a Venetian blind, roller blind, etc.
  • a conventional lifting window blind commonly uses a lift cord or string of beads for pulling by the user to control lifting or lowering of the blind body. Because the lift cord or string of beads is exposed to the outside of the blind body, an accident may happen when a child playing with the lift cord or tilt cord for fun.
  • a window blind with hidden cord members as shown in French Patent FR-2692002, is known comprising a transmission mechanism formed of an input shaft and an output shaft and installed in the headrail of the window blind.
  • the input shaft can be directly rotated by the user (an operation rod may be directly fixedly or detachably connected to the input shaft for operation by the user to rotate the input shaft).
  • the output shaft is driven by the input shaft to rotate a linking rod in the headrail, causing the linking rod to lift or lower the blind body.
  • a pull cord tension adjustment device may be used to offset the downward gravity weight of the blind body, preventing lowering of the blind body after position adjustment.
  • the installation procedure of this structure of pull cord tension adjustment device is complicated.
  • a simple anti-reverse transmission apparatus using a worm and a worm gear to substitute for the aforesaid input shaft and output shaft. Theoretically, the engagement between a worm and a worm gear achieves anti-reverse transmission of a biasing force within a certain condition (the worm can rotate the worm gear with less force, however the worm gear requires a relatively bigger force to rotate the worm).
  • the present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide an anti-reverse transmission apparatus, for use in a lifting window blind with hidden lift cords for operation by the user to transmit biasing force to the lifting window blind and to further lift or lower the blind body, preventing reverse transmission of biasing force.
  • the anti-reverse transmission apparatus is used in a window blind having a headrail, a blind body suspended from said headrail, and a linking rod fastened rotatably inside said headrail for lifting or lowering said blind body when said linking rod is actuated to rotate.
  • the anti-reverse transmission apparatus comprises a base frame having a fixed axle; an input shaft rotatably mounted to said base frame and rotatable by an external force; an output shaft having a tubular shaft body rotatably sleeved onto said fixed axle of said base frame and coupled to said input shaft for rotation by said input shaft, the tubular shaft body of said output shaft having an opening in a periphery thereof; a transmission shaft adapted to be axially coupled to said linking rod of the window blind for synchronous rotation, said transmission shaft having a tubular body sleeved onto the tubular shaft body of said output shaft, the tubular body of said transmission shaft having a protrusion projecting from an inside wall thereof and suspended in the opening of the tubular shaft body of said output shaft; and a spiral spring having a spiral spring body, a first end tip extended from a first end of said spiral spring body, and a second end tip extended from a second end of said spiral spring body, the spiral spring body of said spiral spring being fitted onto said fixed axle of said base
  • An anti-reverse transmission apparatus in accordance with the preferred embodiment of the present invention is to be used in a lifting window blind, for example, a Venetian blind, roller blind, pleated blind, Roman blind, etc.
  • a lifting window blind for example, a Venetian blind, roller blind, pleated blind, Roman blind, etc.
  • FIG. 1 shows a Venetian blind constructed according to the present invention.
  • the Venetian blind 1 comprises a headrail 12, transversely (horizontally) affixed to the top side of the window (not shown), a blind body 14 suspended below the headrail 12 for covering the window and having a bottom rail 22 suspended below the headrail 12 and a set of slats 16 transversely (horizontally) arranged in parallel between the headrail 12 and the bottom rail 22 , a linking rod 18 horizontally rotatably mounted in the headrail 12 , two lift cords 20 bilaterally longitudinally (vertically) extended through the slats 16 , each lift cord 20 having a bottom end affixed to the bottom rail 22 and a top end extended to the inside of the headrail 12 and fastened to the periphery of one bobbin 24 at the linking rod 18 , an anti-reverse transmission apparatus 26 mounted in one end of the headrail 12 and adapted to transfer biasing force from its input end toward its output end and to prevent reversing of biasing force from its output end toward its input end, and a control rod 28
  • the control rod 28 comprises a straight rod member 30 suspended from the anti-reverse transmission apparatus 26 , and a crank 32 coupled to the bottom side of the straight rod member 30 for operation by the user to employ a biasing force to the input end of the anti-reverse transmission apparatus 26.
  • the anti-reverse transmission apparatus 26 comprises a base frame 34 , an input shaft 52, an output shaft 62 , a transmission shaft 70 , and two spiral springs 88.
  • the base frame 34 comprises a main base element 36 and a supplementary base element 38 abutted against each other.
  • the base frame 34 has a substantially rectangular cross-section fitted into one end of the headrail 12 (see FIG. 3), a cylindrical receiving chamber 40 disposed near the outer side of the headrail 12 in parallel to the linking rod 18, a circular axle hole 42 axially extended from one end of the cylindrical receiving chamber 40 toward the inner side of the headrail 12 , a fixed tubular axle 44 axially suspended in the cylindrical receiving chamber 40 and the circular axle hole 42, and a pivot hole 50 radially extended from the cylindrical receiving chamber 40 to one comer thereof facing the inside of the house (see FIG. 3).
  • the fixed tubular axle 44 has a neck 46 at the end, and two crevices 48 axially extended through the neck 46 at two sides.
  • the neck 46 has a beveled end edge.
  • the input shaft 52 is comprised of a shaft body 54 and a bevel gear 56 at one end of the shaft body 54 .
  • the shaft body 54 is pivoted to the pivot hole 50 of the base frame 34, keeping the bevel gear 56 suspended in the cylindrical receiving hole 40.
  • the bottom end of the shaft body 54 extends to the outside of the base frame 34 and the headrail 12 .and obliquely downwardly aims at the inside of the house.
  • the shaft body 54 has a transverse through hole 58 near the bottom end.
  • the aforesaid straight rod member 30 of the control rod 28 has a top hook 60 hooked in the through hole 58 of the shaft body 54. Therefore, the control rod 28 is detachably pivotally coupled to the input shaft 52 and can be operated by the user to rotate the input shaft 52.
  • the output shaft 62 is comprised of a tubular shaft body 64 and a bevel gear 66 at one end of the tubular shaft body 64 .
  • the tubular shaft body 64 is sleeved onto the fixed tubular axle 44 of the base frame 34, keeping the bevel gear 66 meshed with the bevel gear 56 of the input shaft 52 in the cylindrical receiving chamber 40 of the base frame 34 .
  • the number of teeth of the bevel gear 56 of the input shaft 52 is less than the bevel gear 66 of the output shaft 62. Therefore, the input shaft 52 and the output shaft 62 reduce the speed of inputted biasing force but enhance the torque.
  • the tubular shaft body 64 of the output shaft 62 has a 90° sector opening 68 in the periphery (see FIG. 4).
  • the transmission shaft 70 is comprised of a shaft member 72 (see FIG. 5), and a coupling member 74 (see FIG. 6).
  • the shaft member 72 comprises a tubular body 76, a bush 78 in one end of the body 76 and three hooks 80 equiangularly spaced and forwardly extended form an end of the tubular body 76.
  • the tubular body 76 has a longitudinal protrusion 82 in the inside wall.
  • the tubular body 76 of the shaft member 72 is sleeved onto the tubular shaft body 64 of the output shaft 62, keeping the periphery in contact with the peripheral wall of the circular axle hole 42 in the base frame 34 and the longitudinal protrusion 82 in the 90° sector opening 68 of the tubular shaft body 64 of the output shaft 62 (see FIG. 4).
  • the bush 78 of the shaft member 72 is forced over the beveled end edge of the neck 46 to radially compress the fixed tubular axle 44 , causing the fixed tubular axle 44 to close the crevices 48 , and therefore the bush 78 is mounted on the neck 46 of the fixed tubular axle 44.
  • the shaft member 72 and the output shaft 62 are rotatably secured to the fixed tubular axle 44.
  • the coupling member 74 is shaped like a circular box having an axially extended center through hole 86 and three retaining notches 84 equiangularly spaced around the periphery.
  • the cross section of the center through hole 86 fits the cross section of the aforesaid linking rod 18 (for example, both have a hexagonal cross section).
  • the coupling member 74 is coupled to the shaft member 72 , keeping the hooks 84 respectively hooked in the retaining notches 84 of the coupling member 74 , and therefore the coupling member 74 and the shaft member 72 are fastened together, forming the aforesaid transmission shaft 70 .
  • the center through hole 86 of the coupling member 74 is coupled to the linking rod 18 , for enabling the transmission shaft 70 and the linking rod 18 to be rotated synchronously.
  • the two spiral springs 88 each have a spirally extended spring body 90 , and two end tips, namely, the first end tip 92 and the second end tip 94 respectively radially extended from the two ends of the spirally extended spring body 90 (see FIG. 7).
  • the two end tips 92 and 94 define a contained angle about 90°.
  • the operation of the Venetian blind is outlined hereinafter.
  • When adjusting the status of the Venetian blind operate the crank 52 of the control rod 28 with the hands to rotate the straight rod 30 , causing the straight rod 30 to rotate the input shaft 52 of the anti-reverse transmission apparatus 26.
  • the output shaft 62 is rotated synchronously (see FIG. 4).
  • the user can then release the hands from the operation rod 28.
  • the gravity weight of the blind body 14 pulls the lift cords 20 downwards to bias the linking rod 18 and the transmission shaft 70.
  • the longitudinal protrusion 82 is forced against the first end tips 92 of the spiral springs 88 at the beginning of or within a very short time after the rotation of the transmission shaft 70 by the aforesaid biasing force.
  • the user needs not to take any steps to lock the blind body.
  • the input shaft of the anti-reverse transmission apparatus receives no further rotary force from the operation rod, and the blind body of the Venetian blind is automatically locked in the adjusted position. Therefore, the operation of the present invention is easy and, the blind body does not slip down when adjusted. Because the lift cords are hidden in the blind body, the invention eliminates the occurrence of hanging of the lift cords on a person accidentally.
  • the input shaft and output shaft of the anti-reverse transmission apparatus convert input basing force in vertical direction into output biasing force in horizontal direction.
  • a worm and a worm gear may be used for the input shaft and the output shaft respectively to substitute for the bevel gears. The use of worm and worm gear effectively stops reverse transmission of biasing force.
  • the anti-reverse transmission apparatus further has numerous advantages in space design as follows:
EP03018245A 2003-07-17 2003-08-11 Klemmwickelfedervorrichtung zur Meidung einer Rückwärtsbewegung und Fensterrollo mit einer solchen Vorrichtung Withdrawn EP1498570A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN03272646U 2003-07-17
CNU032726465U CN2635880Y (zh) 2003-07-17 2003-07-17 升降式窗帘的单向传动装置以及应用该装置的窗帘

Publications (1)

Publication Number Publication Date
EP1498570A1 true EP1498570A1 (de) 2005-01-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03018245A Withdrawn EP1498570A1 (de) 2003-07-17 2003-08-11 Klemmwickelfedervorrichtung zur Meidung einer Rückwärtsbewegung und Fensterrollo mit einer solchen Vorrichtung

Country Status (2)

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EP (1) EP1498570A1 (de)
CN (1) CN2635880Y (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104295220A (zh) * 2014-09-30 2015-01-21 广州嘉伦橡塑有限公司 一种具有卡位功能的窗帘单向控制装置及其窗帘
CN104329010A (zh) * 2014-09-30 2015-02-04 广州嘉伦橡塑有限公司 一种一键拉伸窗帘降落的窗帘单向控制装置及其窗帘

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080047583A (ko) * 2005-09-28 2008-05-29 헌터더글라스인코포레이티드 톱 다운/바텀 업 능력을 갖는 건축물 개구부 용 롤 업커버링
CN103748306B (zh) * 2011-08-25 2015-08-12 金桢旼 具有单一安全线的卷帘
KR101289584B1 (ko) * 2011-11-22 2013-07-24 김정민 무소음 양방향 클러치를 갖는 롤 블라인드
CN109869085A (zh) * 2017-12-04 2019-06-11 协骏股份有限公司 用于无外露拉绳式窗帘的可拆式卷绳器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4424851A (en) * 1981-01-08 1984-01-10 Toso Kabushiki Kaisha Screen-operating device for use in a roller blind
US4751953A (en) * 1985-10-10 1988-06-21 Zundwarenfabrik Starcke Gmbh & Co. Lateral pull roll-up blind
US5927370A (en) * 1997-11-18 1999-07-27 Judkins; Ren Release brake shade operator
EP0976909A2 (de) * 1998-03-12 2000-02-02 GAPOSA S.r.l. Rohrförmiger Motor für Rolladen und Stores

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4424851A (en) * 1981-01-08 1984-01-10 Toso Kabushiki Kaisha Screen-operating device for use in a roller blind
US4751953A (en) * 1985-10-10 1988-06-21 Zundwarenfabrik Starcke Gmbh & Co. Lateral pull roll-up blind
US5927370A (en) * 1997-11-18 1999-07-27 Judkins; Ren Release brake shade operator
EP0976909A2 (de) * 1998-03-12 2000-02-02 GAPOSA S.r.l. Rohrförmiger Motor für Rolladen und Stores

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104295220A (zh) * 2014-09-30 2015-01-21 广州嘉伦橡塑有限公司 一种具有卡位功能的窗帘单向控制装置及其窗帘
CN104329010A (zh) * 2014-09-30 2015-02-04 广州嘉伦橡塑有限公司 一种一键拉伸窗帘降落的窗帘单向控制装置及其窗帘
CN104329010B (zh) * 2014-09-30 2016-06-22 广州嘉伦橡塑有限公司 一种一键拉伸窗帘降落的窗帘单向控制装置及其窗帘

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Publication number Publication date
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