EP1512828A1 - Dispositif de blocage de corde automatique - Google Patents

Dispositif de blocage de corde automatique Download PDF

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Publication number
EP1512828A1
EP1512828A1 EP04255070A EP04255070A EP1512828A1 EP 1512828 A1 EP1512828 A1 EP 1512828A1 EP 04255070 A EP04255070 A EP 04255070A EP 04255070 A EP04255070 A EP 04255070A EP 1512828 A1 EP1512828 A1 EP 1512828A1
Authority
EP
European Patent Office
Prior art keywords
cord
housing
locking lever
cord lock
locking
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.)
Granted
Application number
EP04255070A
Other languages
German (de)
English (en)
Other versions
EP1512828B1 (fr
Inventor
Nico Dekker
Hin Kieu
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.)
Hunter Douglas Industries BV
Original Assignee
Hunter Douglas Industries BV
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 Hunter Douglas Industries BV filed Critical Hunter Douglas Industries BV
Priority to EP20040255070 priority Critical patent/EP1512828B1/fr
Publication of EP1512828A1 publication Critical patent/EP1512828A1/fr
Application granted granted Critical
Publication of EP1512828B1 publication Critical patent/EP1512828B1/fr
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
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/324—Cord-locks

Definitions

  • the invention relates to an automatically activated cord lock for one or more lift cords of a window covering, particularly for pleated blinds.
  • this invention provides a cord lock that includes:
  • Figure 1 shows a conventional pleated blind 1 with a cord lock 3 as a longitudinal extension on the left side of its longitudinally-extending head rail 5.
  • a longitudinally-extending bottom rail 9 of the blind 1 can be raised and lowered to retract or to deploy a pleated blind fabric 7 by means of conventional lift cords 11, 13 (shown as a single line in Figure 1).
  • Each lift cord 11, 13 is attached, at one end, to the bottom rail 9 and extends upwardly through the head rail 5 and then through the cord lock 3.
  • the lift cords 11, 13 extend downwardly from the cord lock 3, are looped through a conventional cord connector 15 and then extend upwardly toward the cord lock.
  • the free ends of the lift cords are then attached to a fixed cord end receptor 16 on the cord lock.
  • the cord connector 15 can be pulled by means of a single manipulating cord 17, depending from the cord connector, or by means of a tassel 19, depending from the manipulating cord 17, to raise the bottom rail 9 by a distance that is twice the pulling stroke on the manipulating cord 17.
  • This arrangement is particularly suitable for a large pleated blind 1 and prevents excessive lengths of lift cords 11, 13 dangling downwardly when the blind is raised. In this regard, excess lengths of lift cords can present a safety hazard for small children.
  • Figure 2 shows an alternative cord connector 15A which can guide the looped lift cords 11, 13 of the blind 1 over a curved guiding surface 21.
  • Figure 3 shows another alternative cord connector 15B which can guide the looped lift cords 11, 13 of the blind 1 over a rotatable guide pulley 23.
  • Figures 4-7 shows a first embodiment of a cord lock 103 of the invention which is similar to the cord lock 3 of Figure 1 and for which corresponding reference numerals (greater by 100) are used below for describing the same parts or corresponding parts.
  • Figure 4 shows a pleated blind 101 with its cord lock 103 attached to the left end of its head rail 105.
  • the head rail 105 can be mounted on an overhead structure by means of conventional mounting brackets 106.
  • the head rail 105 also holds an upper edge of a pleated blind fabric 107 which may be retracted by pulling lift cords 111, 113 and 114 together through the cord lock 103.
  • the cord lock 103 has a housing 133, best seen in Figure 5.
  • a right part of the housing 133 can be inserted in the left end of the head rail 105 as seen from Figures 4, 6 and 7.
  • Figure 4 also shows the lift cords 111 etc. exiting the cord lock 103 through a cord-guiding funnel 125 on the front of a generally laterally-extending cord-guiding passage 126 in a front portion 122 of a movable, generally laterally-extending locking lever 127 in the housing 133 of the cord lock.
  • the funnnel 125 and a front portion of the cord-guiding passage 126 extend outwardly from the front of the housing 133.
  • the lift cords pass downwardly from the funnel 125 and through a connector (not shown) and are then attached to a fixed cord end receptor 116 on the front of a laterally-extending front wall 118 of the cord lock housing 133, located on its front at about its longitudinal middle.
  • the housing's front wall 118 has a left-facing laterally-extending shoulder 120, against which the right side 122A of the front portion 122 of the locking lever 127 can abut to limit its rightward movement during counter-clockwise pivoting of the locking lever as shown in Figure 6.
  • Figure 5 best shows the cord lock's housing 133 and locking lever 127, including its funnel 125 at the front of its cord-guiding passage 126.
  • the right side of the housing 133 has a longitudinally-(rightwardly-)extending profiled tongue 137 which is adapted to be inserted into, and snugly fit within, the contours of the left side of the head rail 105.
  • the profiled tongue 137 has a longitudinally-extending channel 139, through which the lift cords 111 etc. can extend longitudinally from the cord lock housing 133 into the head rail 105.
  • the housing 133 also includes a cover 141, and the cord end receptor 116 of the housing includes a recessed cavity 143 for holding a knot at the end of each lift cord.
  • the locking lever 127 extends horizontally- and rearwardly into the cord lock housing 133 and is pivotally connected to a vertically-extending cylindrical pivot pin 129.
  • the cord-guiding passage 126 in the front portion 122 of the locking lever 127 extends laterally (rearwardly) from the funnel 125 toward the pivot pin 129.
  • a rear portion 124 of the locking lever 127, rearwardly of the pivot pin, has a vertically- and longitudinally-extending rear surface with a cord-gripping formation 145.
  • the cord-gripping formation 145 preferably includes a rearwardly-and rightwardly-facing abutment 146 with a cord-gripping surface
  • a vertically- and longitudinally-extending front surface on the rear wall 147 of the cord lock housing 133 includes a locking surface 161.
  • the locking surface 161 is located longitudinally closer to the housing's channel 139 than is the cord-gripping formation 145 in the rear surface of the locking lever 127.
  • the locking surface 161 is preferably also a shoulder on the front surface of the rear wall 147 with a frontally-and leftwardly-facing cord-gripping surface. Thereby, the shoulder of the locking surface 161 can abut against the cord-gripping formation 145 of the locking lever in order to limit its clockwise (rightward) movement as shown in Figure 7.
  • each pull cord (only 111 is shown) extends upwardly and then rearwardly and horizontally into the cord lock housing 133. Then, as shown in Figures 6 and 7, each pull cord extends horizontally within the housing: rearwardly through the funnel 125 and cord-guiding passage 126 of the locking lever 127, rearwardly and to the left about a vertically-extending cylindrical cord-guiding pin 149, rearwardly and to the right between the cord-gripping formation 145 and the rear wall 147 and then rearwardly and to the right towards the channel 139 and the head rail 105.
  • the cord-gripping formation 145 preferably is adapted to significantly restrain longitudinal movement of the lift cords 111 etc. along its cord-gripping surface, particularly movement to the right, towards the channel 139, when the cord-gripping formation is moved clockwise (to the right) to actually engage the locking surface 161 (as in Figure 7).
  • the cord-gripping formation 145 also is preferably adapted not to significantly restrain longitudinal movement of the lift cords along its cord-gripping surface when it is not actually engaging the locking surface 161 (as in Figure 6).
  • the locking surface 161 preferably is adapted to significantly restrain longitudinal movement of the lift cords 111 etc. along it only when the cord-gripping formation 145 is moved to the right to actually engage it (as in Figure 7).
  • the pivot pin 129 is received in a first pair of holes 135A, 135B (not shown in Figure 5), respectively in a horizontally-extending top wall 155 and a horizontally-extending bottom wall 157 of the housing 133.
  • the pivot pin 129 is located longitudinally between the cord-guiding pin 149 and the locking surface 161 on the rear wall 147 of the housing 133 and laterally between the front and rear portions 122, 124 of the locking lever.
  • the locking lever 127 has a vertically-extending bore 131 that is located laterally between its cord-gripping formation 145 and its cord-guiding passage 126 and is pivotally positioned on the pivot pin 129.
  • the locking lever 127 can pivot horizontally about the pivot pin 129, between the top and bottom walls 155, 157 of the housing, so that the rear portion 124 of the locking lever and its cord-gripping formation 145 move rearwardly and horizontally to the right (i.e., clockwise), towards the locking surface 161, when its front portion 122 and its cord-guiding passage 126 are moved horizontally to the left, away from the locking surface 161.
  • the cord-gripping formation 145 of the locking lever 127 can tightly hold the pull cords 111 etc. against the locking surface 161 on the rear wall 147 of the housing 137 when the cord-gripping formation is urged rightwardly against the locking surface 161.
  • the cord-guiding pin 149 in the housing 133 guides each lift cord 111 etc. at an appropriate angle between the cord-gripping formation 145 at the rear of the locking lever 127 and the rear wall 147 of the housing, so that the lift cords frictionally contact, and move longitudinally along, the cord-gripping formation 145 and move longitudinally along the channel 139 whenever the lift cords 111 etc. are being pulled from, or released towards, the cord lock 103 and the head rail 105 by a user of the blind 101.
  • the cord-guiding pin 149 is mounted, in the housing, on the opposite longitudinal side of the locking lever 127 from the channel 139, laterally between the front and rear of the locking lever, and either rearwardly or frontwardly of the pivot pin 129.
  • the cord-guiding pin 149 can be mounted in either a second pair of vertically-aligned holes 151A and 151B, rearwardly of the pivot pin 129, or a third pair of vertically-aligned holes 153A and 153B, frontwardly of the pivot pin, in the top and bottom walls 155 and 157, respectively, of the housing.
  • the location of the cord-guiding pin 149 will be selected depending upon which is better, in view of whether the cord lock is to be used with a head rail that is horizontal or is slanted.
  • the cord-guiding pin 149 is preferably located (in Figure 6) in the third pair of holes 153A and 153B, laterally farther from the rear wall 147, for a vertically-slanted head rail 105 and is preferably located (in Figure 7) in the second pair of holes 151A and 151B, laterally closer to the rear wall 147, for a horizontal head rail 105.
  • the locking lever 127 In the unlocked position of the cord lock 103 as shown in Figure 6, the locking lever 127 has been pivoted in a counter-clockwise direction, so that its rear is moved longitudinally (to the left) away from the channel 139, by a user of the blind 101 pulling on the lift cords 111 etc. Thereby, the cord-gripping formation 145 on the rear portion 124 of the locking lever has been moved longitudinally away from the locking surface 161 on the rear wall 147 of the housing 133 and preferably also frontwardly away from the locking surface 161. This has disengaged the cord-gripping formation 145 from the locking surface 161. Thereby, the lift cords can move relatively freely longitudinally between the rear portion 124 of the locking lever and the rear wall 147 of the housing.
  • the weight of the covering 107 on the lift cords 111 etc. causes the lift cords to continuously engage frictionally the rear portion 124 of the locking lever and its cord-gripping formation 145 and to continuously urge the rear portion of the locking lever to pivot back in a clockwise direction, longitudinally to the right toward the channel 139, from its counter-clockwise position in Figure 6, caused by the user's pull on the lift cords. Nevertheless while the user continues to pull on the lift cords, the rear of the locking lever remains pivoted to the left, in a counter-clockwise position, and the cord lock remains unlocked.
  • the cord-gripping formation 145 on the rear portion 124 of the locking lever 127 is urged against, and engages, the cord-gripping surface of the locking surface 161 of the rear wall 147 of the housing 133.
  • the cord-gripping formation 145 and the locking surface 161 grip tightly the lift cords 111, etc. between them and prevent the lift cords from moving longitudinally between them.
  • the cord lock 103 automatically moves from its unlocked position in Figure 6 to its locked position in Figure 7. This occurs when the user of the blind 101 releases the lift cords 111 etc., which allows the weight of the pleated blind fabric 107 to pull the lift cords upwardly to the funnel 125 on the front of the locking lever, then rearwardly through its cord-guiding passage 126, then around the cord-guiding pin 149 and then longitudinally (to the right) between the rear wall 147 of the housing 133 and the rear of the locking lever 127, about and along its cord-gripping formation 145, toward the channel 139 as shown in Figure 6.
  • the user can then easily pull further on the lift cords to pull up the pleated blind fabric 107 and pull the lift cords longitudinally to the left within the channel 139 and then about and along the cord-gripping formation 145, then around the cord-guiding pin 149, then through the cord-guiding passage 126, and then downwardly from the funnel 125 as shown in Figure 6.
  • Figures 8-14 show a second embodiment of a cord lock 203 of the invention which is similar to the cord lock 103 of Figures 4-7 and for which corresponding reference numerals (greater by 100) are used below for describing the same parts or corresponding parts.
  • the cord lock 203 for one or more lift cords 211 etc. is accommodated in an opening 263 in the front of the head rail 205 of a pleated blind 201.
  • the cord lock 203 has a horizontally- and rearwardly-extending locking lever 227.
  • a front portion 222 of the locking lever 227 contains a generally laterally-extending rear surface cord-guiding passage 226, and a rear portion 224 of the locking lever 227 has a vertically- and longitudinally-extending rear surface with a cord-gripping formation 245.
  • the cord lock 203 also has a vertically- and frontally-extending locking surface 261 on the rear wall 247 of the housing 233.
  • a cord end receptor 216 is also provided in a front portion 222 of the locking lever 227 when the blind 201 includes a cord connector like those shown in Figure 2 or 3.
  • the locking lever 227 has a bore 231, pivotally located on a pivot pin 229.
  • the pivot pin 229 is mounted in a first pair of holes 235A and 235B in respectively the top wall 255 and bottom wall 257 of the housing 233.
  • the locking lever 227 can pivot horizontally about the pivot pin, between the top and bottom walls 255, 257 of the housing 233, so that the rear portion 224 of the locking lever and its cord-gripping formation 245 automatically move rearwardly and horizontally to the right (clockwise), towards the locking surface 261, as shown in Figure 12, when a user of the blind 201 releases its lift cords 211 etc.
  • the cord lock 203 also has a vertically-extending cylindrical cord-guiding pin 249.
  • the cord-guiding pin 249 can be mounted at two different horizontal locations in the housing 233, corresponding to either a second pair of vertically-aligned holes 251A and 251B (as shown in Figures 11 and 12) or a third pair of vertically-aligned holes 253A and 253B (as shown in Figures 13 and 14) in the top and bottom walls 255 and 257, respectively, of the housing.
  • the cord lock housing 233 has an interior left-facing laterally-extending wall with a shoulder 220, against which the right side 222A of the front portion 222 of the locking lever 227 can abut to limit its rightward movement during counter-clockwise pivoting of the locking lever as shown in Figures 11 and 13.
  • the cord lock housing 233 features, on its longitudinally opposite sides, a pair of longitudinally-resilient tongues 271 and 273.
  • the tongues 271 and 273 extend frontwardly and longitudinally away from middle portions of longitudinally opposite sides of the housing 233.
  • the tongues are thereby adapted to frictionally engage internal portions of the head rail 205 on longitudinally opposite sides of the opening 263 in the front of the head rail and on longitudinally opposite sides of the housing, so as to retain the housing in the opening.
  • Figures 15 and 16 show a third embodiment of a cord lock 303 of the invention which is similar to the cord lock 103 of Figures 8-14 and for which corresponding reference numerals (greater by 200) are used below for describing the same parts or corresponding parts.
  • the cord lock 303 has a horizontally- and rearwardly-extending locking lever 327.
  • a front portion 322 of the locking lever 327 contains a generally laterally-extending cord-guiding passage 326, and a rear portion (not shown) of the locking lever 327 has a vertically- and rearwardly-extending surface with a cord-gripping formation (not shown).
  • the cord lock 303 also has a vertically- and frontally-extending locking surface (not shown) on the rear wall (not shown) of its housing 333.
  • the cord lock housing 333 features a stepped horizontally-extending lower wall 357.
  • a vertically-extending threshold 340 divides the lower wall 357 into a right lower section 357A, adjacent the locking surface (not shown), and a left upper section 357B, adjacent a cord-guiding pin (not shown) between the locking lever's cord-guiding passage 326 and cord-gripping formation (not shown).
  • parts of the front portion 322 of the locking lever 327 rest on the lower section 357A of the lower wall 357.
  • parts of the front portion 322 of the locking lever 327 rest on the upper section 357B of the lower wall 357.
  • FIGs 17-19 show a fourth embodiment of a cord lock 403 of the invention which is similar to the cord lock 103 of Figures 8-14 and for which corresponding reference numerals (greater by 300) are used below for describing the same parts or corresponding parts.
  • the cord lock 403 has a horizontally- and rearwardly-extending locking lever 427.
  • a front portion 422 of the locking lever 427 contains a generally laterally-extending cord-guiding passage 426, and a separate rear portion 424 of the locking lever 427 has a vertically- and rearwardly-extending surface with a cord-gripping formation 445.
  • a front part 424B of the rear portion 424 and an adjacent rear part 422B of the front portion 422 are pivotally connected to the pivot pin 429. At least the front part 424B of the rear portion 424 lies atop the rear part 422B of the front portion 422.
  • the cord lock 403 also has a vertically- and frontally-extending locking surface 461 on the rear wall 447 of its housing 433.
  • the front and rear portions 422, 424 of the locking lever 427 can swivel counter-clockwise about the pivot pin 429 when a user of a blind with the cord lock 403 pulls lift cords (not shown), extending through the cord lock 403.
  • the rear portion 424 can swivel counter-clockwise further, preferably by about 15°, than the front portion 422 with longitudinal movement of the lift cords toward the cord-guiding pin 449.
  • the limit to the counter-clockwise swivel of the rear portion 424, relative to the front portion 422, is established by the abutment of a vertically-extending left front edge 470 of the rear portion 424 with an adjacent vertically-extending left rear edge 472 of the front portion 422.
  • the housing 433 has a left-facing laterally-extending interior wall with a shoulder 420, against which the right side 422A of the front portion 422 of the locking lever 427 can abut to limit its rightward movement during counter-clockwise pivoting of the locking lever as shown in Figure 19.
  • the front and rear portions 422, 424 of the locking lever 427 can also swivel clockwise about the pivot pin 429 when the user releases the lift cords (not shown).
  • the rear portion 424 can swivel clockwise further than the front portion 422 with longitudinal movement of the lift cords away from the cord-guiding pin 449.
  • the limit to the clockwise swivel of the rear portion 424, relative to the front portion 422, is established by the abutment of a vertically-extending right rear edge 474 of the rear portion with an adjacent vertically-extending right front edge 476 of the front portion.
  • the cord-gripping formation 445 on the rear portion 424 of the locking lever can engage the locking surface 461 on the rear wall 447 of the housing to hold the lift cords when the user releases his grip on them.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
EP20040255070 2003-09-02 2004-08-23 Dispositif de blocage de corde automatique Expired - Lifetime EP1512828B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20040255070 EP1512828B1 (fr) 2003-09-02 2004-08-23 Dispositif de blocage de corde automatique

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
EP03077752 2003-09-02
EP03077752 2003-09-02
EP04076988 2004-07-09
EP04076988 2004-07-09
EP20040255070 EP1512828B1 (fr) 2003-09-02 2004-08-23 Dispositif de blocage de corde automatique

Publications (2)

Publication Number Publication Date
EP1512828A1 true EP1512828A1 (fr) 2005-03-09
EP1512828B1 EP1512828B1 (fr) 2010-08-18

Family

ID=34139268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040255070 Expired - Lifetime EP1512828B1 (fr) 2003-09-02 2004-08-23 Dispositif de blocage de corde automatique

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EP (1) EP1512828B1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2010286A (en) 1935-04-23 1935-08-06 Ry Lock Company Ltd Venetian blind locking mechanism
GB952504A (en) * 1960-07-04 1964-03-18 Hunter Douglas Int Quebec Ltd A locking device for lift means, for example lift cords or lift tapes of a venetian blind, a curtain or the like
CH388125A (de) * 1959-09-01 1965-02-15 Vista Gmbh Feststellvorrichtung für Zugorgane, beispielsweise Schnüre, Bänder, Gurte u. dgl. von Jalousien, Rolladen, Vorhängen u. dgl.
DE1207826B (de) * 1958-03-14 1965-12-23 Vista G M B H Selbsttaetige Klemmvorrichtung fuer eine Zugschnur von Lamellen-Jalousien od. dgl.
NL8301108A (nl) * 1982-08-31 1984-03-16 Schoen Siegfried Joachim Vergrendelinrichting en verbeterd trekorgaan voor trekkoorden van een op en neer beweegbaar scherm.
NL8301286A (nl) 1982-11-13 1984-06-01 Langmatz Hans Onderhoudsvrije kunststofmast voor lampen, verkeerslichten, verkeersborden en dergelijke.
EP0690199A1 (fr) * 1994-06-28 1996-01-03 Verosol Nederland B.V. Dispositif de blocage de corde

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2010286A (en) 1935-04-23 1935-08-06 Ry Lock Company Ltd Venetian blind locking mechanism
DE1207826B (de) * 1958-03-14 1965-12-23 Vista G M B H Selbsttaetige Klemmvorrichtung fuer eine Zugschnur von Lamellen-Jalousien od. dgl.
CH388125A (de) * 1959-09-01 1965-02-15 Vista Gmbh Feststellvorrichtung für Zugorgane, beispielsweise Schnüre, Bänder, Gurte u. dgl. von Jalousien, Rolladen, Vorhängen u. dgl.
GB952504A (en) * 1960-07-04 1964-03-18 Hunter Douglas Int Quebec Ltd A locking device for lift means, for example lift cords or lift tapes of a venetian blind, a curtain or the like
NL8301108A (nl) * 1982-08-31 1984-03-16 Schoen Siegfried Joachim Vergrendelinrichting en verbeterd trekorgaan voor trekkoorden van een op en neer beweegbaar scherm.
NL8301286A (nl) 1982-11-13 1984-06-01 Langmatz Hans Onderhoudsvrije kunststofmast voor lampen, verkeerslichten, verkeersborden en dergelijke.
EP0690199A1 (fr) * 1994-06-28 1996-01-03 Verosol Nederland B.V. Dispositif de blocage de corde
EP0690199B1 (fr) 1994-06-28 1999-04-14 Verosol Nederland B.V. Dispositif de blocage de corde

Also Published As

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