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WO2011084100A1 - Roller blind - Google Patents

Roller blind Download PDF

Info

Publication number
WO2011084100A1
WO2011084100A1 PCT/SE2011/050009 SE2011050009W WO2011084100A1 WO 2011084100 A1 WO2011084100 A1 WO 2011084100A1 SE 2011050009 W SE2011050009 W SE 2011050009W WO 2011084100 A1 WO2011084100 A1 WO 2011084100A1
Authority
WO
WIPO (PCT)
Prior art keywords
wheel
cord
roller blind
strands
pulling means
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.)
Ceased
Application number
PCT/SE2011/050009
Other languages
French (fr)
Inventor
Stefan Schörling
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.)
HASTA GROUP AB
Original Assignee
HASTA GROUP AB
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 HASTA GROUP AB filed Critical HASTA GROUP AB
Priority to CN201180006019.1A priority Critical patent/CN102753781B/en
Publication of WO2011084100A1 publication Critical patent/WO2011084100A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • E06B9/40—Roller blinds
    • E06B9/42—Parts or details of roller blinds, e.g. suspension devices, blind boxes
    • 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
    • E06B9/78—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor for direct manual operation, e.g. by tassels, by handles
    • 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
    • E06B9/78—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor for direct manual operation, e.g. by tassels, by handles
    • E06B2009/785—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor for direct manual operation, e.g. by tassels, by handles by belts, straps, bands, tapes, cords, tassels

Definitions

  • the invention relates to a roller blind with a pull cord running over a wheel.
  • Roller blinds of this type usually have a ball chain in a closed loop.
  • This loop constitutes a risk as young children can put their heads in the loop and be strangled.
  • One aim of the invention is to eliminate this risk without increasing manufacturing costs. This is achieved in that the chain has open strands and the cord and the wheel are adapted in such a manner that the cord slips on the wheel when one of the strands is pulled except when a counterforce is applied to the other trailing strand. There is therefore no need for a closed loop.
  • Figure 1 is a perspective view of a roller blind.
  • Figure 2 is an exploded diagram corresponding to Figure 1.
  • Figure 3 is a perspective view of a roller blind slightly modified compared to that of
  • Figure 4 is an exploded diagram corresponding to Figure 3. Description of illustrated embodiments of the invention
  • Figures 1 and 2 show one end of a roller blind. It has a wheel 11 with cogs 12 and an end journal 13 with a square hole 14 which matches a square peg (not shown) on a bracket 16 mounted on the wall.
  • the cog-wheel 11 is non-rotatably fixed to the rod of the roller blind and has tangential play with respect to the end journal 13 except when it is rotated towards the limit of the tangential play and can then rotate freely relative to the stationary end journal.
  • This locking mechanism for preventing unintentional rotation of the roller blind is conventional and is not described here.
  • a ball chain 20 lies over the cog-wheel 11 so as to result in two open strands 21 , 22.
  • the cogs 12 of the cog-wheel form shallow depressions for the balls of the ball chain and the cogs are adapted in such a manner that the ball chain comes out of mesh when any one of these strands is pulled.
  • one of the strands is pulled and a counterforce is applied to the other strand so that the ball chain does not come out of mesh.
  • the other strand can then be returned to the starting position without a counterforce being applied without the cog-wheel rotating and then the action can be repeated in order to rotate the cog-wheel again.
  • Figures 3 and 4 show a modified embodiment in which a cord 23 having a circular cross section is used as a pulling means instead of a ball chain.
  • Figure 4 shows the cog-wheel 11 removed from the end of the rod of the roller blind, whereas in Figure 2 it is shown inserted.
  • the two strands 23 of the cord are designated by the reference numerals 24, 25. Otherwise, the same reference numerals used in Figures 1 and 2 are used here.
  • the cord 23 is wrapped around the wheel, i.e. it has a large winding angle, in this case greater than 360 degrees.
  • the winding angle is adapted to the cord and wheel combination so as to give the same function as that of the embodiment according to Figures 1 and 2, i.e.
  • the winding angle does not have to be as large as that shown. In the extreme case, it is sufficient for the cord to lie over the wheel, i.e. to have a winding angle of 180 degrees, although a relatively large counterforce is then often required in order to rotate the wheel 11.
  • This winding angle can be increased by applying a guide means to the underside of the wheel to control the two strands of the cord in such a manner that the winding angle is, e.g. 270 degrees or more.
  • Figures 3 and 4 show a lateral projection 26 on the end cover above the cogs 12 and this projection prevents the ball chain from skipping if it is desired to use a ball chain in a closed loop in the conventional manner instead of the cord 23.
  • a cord 23 it is of course not necessary to use a cog-wheel and a smooth wheel can be used.
  • a cord or a ball chain has been shown by way of example for the pulling means.
  • a flat belt can be used as the pulling means.
  • Other modifications are also possible within the scope of the claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Blinds (AREA)

Abstract

A roller blind has an operating mechanism in the form of an elongated pulling means running over a wheel (11) so as to form two strands (21, 22; 24, 25). This pulling means may be, e.g. a ball chain (20) or a plain cord (23) and the wheel may be a cog-wheel. The cord and the wheel are adapted in such a manner that the cord slips on the wheel when one of the strands is pulled except when a counterforce is applied to the other trailing strand.

Description

Roller blind
Field of the invention
The invention relates to a roller blind with a pull cord running over a wheel.
Background of the invention and brief description of the invention
Roller blinds of this type usually have a ball chain in a closed loop. This loop constitutes a risk as young children can put their heads in the loop and be strangled. One aim of the invention is to eliminate this risk without increasing manufacturing costs. This is achieved in that the chain has open strands and the cord and the wheel are adapted in such a manner that the cord slips on the wheel when one of the strands is pulled except when a counterforce is applied to the other trailing strand. There is therefore no need for a closed loop.
Brief description of the drawings
Figure 1 is a perspective view of a roller blind.
Figure 2 is an exploded diagram corresponding to Figure 1.
Figure 3 is a perspective view of a roller blind slightly modified compared to that of
Figure 1.
Figure 4 is an exploded diagram corresponding to Figure 3. Description of illustrated embodiments of the invention
Figures 1 and 2 show one end of a roller blind. It has a wheel 11 with cogs 12 and an end journal 13 with a square hole 14 which matches a square peg (not shown) on a bracket 16 mounted on the wall. The cog-wheel 11 is non-rotatably fixed to the rod of the roller blind and has tangential play with respect to the end journal 13 except when it is rotated towards the limit of the tangential play and can then rotate freely relative to the stationary end journal. This locking mechanism for preventing unintentional rotation of the roller blind is conventional and is not described here.
A ball chain 20 lies over the cog-wheel 11 so as to result in two open strands 21 , 22. The cogs 12 of the cog-wheel form shallow depressions for the balls of the ball chain and the cogs are adapted in such a manner that the ball chain comes out of mesh when any one of these strands is pulled.
In order to rotate the cog-wheel and raise or lower the roller blind, one of the strands is pulled and a counterforce is applied to the other strand so that the ball chain does not come out of mesh. The other strand can then be returned to the starting position without a counterforce being applied without the cog-wheel rotating and then the action can be repeated in order to rotate the cog-wheel again.
As a result of the fact that the action can be repeated, there is no need for a closed loop on the chain and it is possible to use an open chain with relatively short strands.
Figures 3 and 4 show a modified embodiment in which a cord 23 having a circular cross section is used as a pulling means instead of a ball chain. Figure 4 shows the cog-wheel 11 removed from the end of the rod of the roller blind, whereas in Figure 2 it is shown inserted. The two strands 23 of the cord are designated by the reference numerals 24, 25. Otherwise, the same reference numerals used in Figures 1 and 2 are used here. The cord 23 is wrapped around the wheel, i.e. it has a large winding angle, in this case greater than 360 degrees. The winding angle is adapted to the cord and wheel combination so as to give the same function as that of the embodiment according to Figures 1 and 2, i.e. so that the wheel 11 is rotated when a counterforce is applied to the trailing strand. If the friction between the cord and the wheel is high, the winding angle does not have to be as large as that shown. In the extreme case, it is sufficient for the cord to lie over the wheel, i.e. to have a winding angle of 180 degrees, although a relatively large counterforce is then often required in order to rotate the wheel 11. This winding angle can be increased by applying a guide means to the underside of the wheel to control the two strands of the cord in such a manner that the winding angle is, e.g. 270 degrees or more.
Figures 3 and 4 show a lateral projection 26 on the end cover above the cogs 12 and this projection prevents the ball chain from skipping if it is desired to use a ball chain in a closed loop in the conventional manner instead of the cord 23. When a cord 23 is used, it is of course not necessary to use a cog-wheel and a smooth wheel can be used.
A cord or a ball chain has been shown by way of example for the pulling means. Alternatively, e.g. a flat belt can be used as the pulling means. Other modifications are also possible within the scope of the claims.

Claims

Claims
1. Roller blind with an operating mechanism in the form of an elongated pulling means (20, 23) running over a wheel (11) so as to form two strands (21 , 22; 24, 25), characterised in that
the strands are open and the pulling means (20, 23) and the wheel (11) are adapted in such a manner that the cord slips on the wheel when one of the strands (21 , 22; 24, 25) is pulled except when a counterforce is applied to the other trailing strand.
2. Roller blind according to claim 1 , characterised in that the pulling means is a ball chain (20) and the wheel (11) has shallow depressions for the balls of the ball chain adapted in such a manner that the ball chain skips if no counterforce is applied.
3. Roller blind according to claim 1 , characterised in that the pulling means is a plain cord (23) having a winding angle of more than 180 degrees.
4. Roller blind according to claim 3, characterised in that the cord (23) has a winding angle of more than 270 degrees.
PCT/SE2011/050009 2010-01-10 2011-01-09 Roller blind Ceased WO2011084100A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201180006019.1A CN102753781B (en) 2010-01-10 2011-01-09 a roller blind

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1000014A SE535264C2 (en) 2010-01-10 2010-01-10 Curtain with open draw line
SE1000014-9 2010-01-10

Publications (1)

Publication Number Publication Date
WO2011084100A1 true WO2011084100A1 (en) 2011-07-14

Family

ID=44305653

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2011/050009 Ceased WO2011084100A1 (en) 2010-01-10 2011-01-09 Roller blind

Country Status (3)

Country Link
CN (1) CN102753781B (en)
SE (1) SE535264C2 (en)
WO (1) WO2011084100A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103993818B (en) * 2014-05-13 2015-12-23 宁波格兰家居用品有限公司 Shutter curtain ropewinder
CN104533269B (en) * 2014-11-06 2017-02-01 杭州万事达装饰用品有限公司 Single-rope shutters

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2209234A (en) * 1939-03-20 1940-07-23 Michael J Nardulli Venetian blind
US2577046A (en) * 1950-03-17 1951-12-04 Armand Montate Combination window shade roller bracket and actuating means
US4475580A (en) * 1980-01-17 1984-10-09 Hunter Douglas International N.V. Mechanism for a roller blind
DE29711893U1 (en) * 1997-07-07 1997-09-11 Lin, Cheng-Tai, Shui-Shang Hsiang, Chiayi Angle control device for a blind assembly unit
US6971435B2 (en) * 2000-10-13 2005-12-06 A/S Chr. Fabers Fabriker Raising and lowering mechanism, in particular for roller blinds

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2209234A (en) * 1939-03-20 1940-07-23 Michael J Nardulli Venetian blind
US2577046A (en) * 1950-03-17 1951-12-04 Armand Montate Combination window shade roller bracket and actuating means
US4475580A (en) * 1980-01-17 1984-10-09 Hunter Douglas International N.V. Mechanism for a roller blind
DE29711893U1 (en) * 1997-07-07 1997-09-11 Lin, Cheng-Tai, Shui-Shang Hsiang, Chiayi Angle control device for a blind assembly unit
US6971435B2 (en) * 2000-10-13 2005-12-06 A/S Chr. Fabers Fabriker Raising and lowering mechanism, in particular for roller blinds

Also Published As

Publication number Publication date
CN102753781A (en) 2012-10-24
SE1000014A1 (en) 2011-07-11
SE535264C2 (en) 2012-06-12
CN102753781B (en) 2014-02-19

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