CA2332702A1 - Lifting mechanism for a cordless venetian blind - Google Patents
Lifting mechanism for a cordless venetian blind Download PDFInfo
- Publication number
- CA2332702A1 CA2332702A1 CA 2332702 CA2332702A CA2332702A1 CA 2332702 A1 CA2332702 A1 CA 2332702A1 CA 2332702 CA2332702 CA 2332702 CA 2332702 A CA2332702 A CA 2332702A CA 2332702 A1 CA2332702 A1 CA 2332702A1
- Authority
- CA
- Canada
- Prior art keywords
- wheel
- lifting mechanism
- bracket
- venetian blind
- rollers
- 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.)
- Abandoned
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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
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Blinds (AREA)
Abstract
A lifting mechanism (30) includes a bracket (34) to hold the lifting mechanism (30). Two rollers (31) are respectively rotatably mounted in the bracket (34).
A balance wheel set (32) is mounted in the bracket (34) and includes a first wheel (321) rotatably mounted between the two rollers (31) and simultaneously rotated with the two rollers (31), and a second wheel (322) rotatably mounted in the bracket (34) near the first wheel (321).
A constant force motor spring (33) is mounted and wound between the first wheel (321) and the second wheel (322). Due to the constant force motor spring (33), a cord to raise or lower the slats is unnecessary and the cordless venetian blind can be opened or closed easily.
A balance wheel set (32) is mounted in the bracket (34) and includes a first wheel (321) rotatably mounted between the two rollers (31) and simultaneously rotated with the two rollers (31), and a second wheel (322) rotatably mounted in the bracket (34) near the first wheel (321).
A constant force motor spring (33) is mounted and wound between the first wheel (321) and the second wheel (322). Due to the constant force motor spring (33), a cord to raise or lower the slats is unnecessary and the cordless venetian blind can be opened or closed easily.
Description
1 BRIEF DESCRIPTION Ol-~ ~I~I-I1DRAWINGS
2 Fig. I is an operational front plan view of a cordless venetian blind with a lifting 3 mechanism in accordance with the present invention;
2 Fig. I is an operational front plan view of a cordless venetian blind with a lifting 3 mechanism in accordance with the present invention;
4 Fig. 2 is a partially exploded perspective view in partial section of the lifting mechanism for the cordless venetian blind in Fig. l;
6 Fig. 3 is an exploded perspective view of the lifting mechanism in Fig. 2 for a 7 cordless venetian blind;
8 Fig. 4 is a front cross sectional front plan view of the lifting mechanism for a 9 cordless venetian blind along line 4-4 in E'ig. 2;
Fig. 5 is side cross sectional view of another embodiment of the brake plate of the 11 lifting mechanism for a cordless venetian blind in accordance with the present invention;
12 and 13 Fig. 6 is a top plan view of another embodiment of the lifting mechanism for a 14 cordless venetian blind in accordance with the present invention.
BACKGROUND OF rfI-IE fNVEN~I'I~N
16 1. Field of the Invention 17 The present invention relates to a lifting mechanism, and more particularly to a 18 lifting mechanism for a cordless venetian blind.
19 2. Description of Related Art A conventional lifting mechanism for a cordless venetian blind in accordance with 21 the prior comprises a hollow frame mounted on the wall above the window. A
series of 22 slats parallel to the frame are mounted below the frame by two cords respectively attached 23 to opposite ends of the lowest blind. A rotor moves the series of slats from a horizontal 24 position to a nearly vertical position to selectively open and close the slats with respect to 1 the passage of light. A control device is mounted in the frame and has a cord with one end 2 attached to the lowest blind and the other passing through the control device for a user to 3 pull to open or close the venetian blind. It is an inconvenient design because the user's 4 hand must carry the weight of all of the slats when opening the conventional venetian blind.
6 The present invention has arisen to mitigate and/or obviate the disadvantages of 7 the conventional venetian blind.
9 The main objective of the present invention is to provide an improved lifting mechanism for a cordless venetian blind that makes the opening or closing of the venetian 11 blind easier and more convenient.
12 The lifting mechanism comprises a bracket to hold the lifting mechanism.
Two 13 rollers are respectively rotatably mounted in the bracket. A balance wheel set is mounted in 14 the bracket and includes a first wheel rotatably mounted between the two rollers and simultaneously rotated with the two rollers, and a second wheel rotatably mounted in the 1 G bracket near the first wheel. An S-shaped constant force motor spring is mounted between 17 the first wheel and the second wheel, and has a first end attached to a periphery of the first 18 wheel and a second end wound on the second wheel. Due to the constant force motor 19 spring, the cord is unnecessary and the cordless venetian blind can be opened or closed easily.
21 Further benefits and advantages of the present invention will become apparent 22 after a careful reading of the detailed description with appropriate reference to the 23 accompanying drawings.
24 D>~TAI D DF RIPTION I~ THIi INVENTION
With reference to the drawings and initially to Figs. 1 and 2, a cordless venetian 2 blind usually comprises a frame ( 10) securely attached to the wall, a rotor (20) mounted in 3 the frame (10) and a lifting mechanism (30) mounted in the frame (10). The frame (10) 4 includes a series of slats (11) each parallel to the frame (10) and mounted below the frame ( 10) by two balance cords ( 12) respectively attached to opposite ends of the lowest blind.
6 The rotor (20) moves the series of slats ( 11) from a horizontal position to a nearly vertical 7 position to selectively open and close the slats (11) with respect to the passage of light. The 8 rotor (20) is a well-known structure so it will not be described in detail.
9 The lifting mechanism (30) is mounted in a U-shaped bracket (34) that is attached to the frame (10). The lifting mechanism (30) includes two concentric rollers (31) and a 11 balance wheel set (32) each rotatably mounted in the bracket (34). The balance wheel set 12 (32) includes a first wheel (321) concentrically mounted between the two rollers (31) and 13 simultaneously rotated with the two rollers (31 ), and a second wheel (322) rotatably 14 mounted to correspond to the First wheel (321 ). An S-shaped constant force motor spring (33) is coupled between the first wheel (321) and the second wheel (322).
16 With reference to Digs. 2 and 3, in the preferred embodiment of the present 17 invention, the first wheel (321) and the two rollers (31) are integral. The first wheel (321) 18 has a diameter smaller than that of the two rollers (31 ). A first hole (310) is axially defined 19 in the rollers (31 ) and extends through the first wheel (321 ). A first axle (311 ) is securely mounted in the first hole (310), and a i7rst through hole (312) is axially defined in the first 21 axle (311 ). A f rst axle pin (313) extends through the first through hole (312) and has two 22 ends respectively held by opposite sidewalk of the bracket (34). A second hole (323) is 23 axially defined in the second wheel (322). A second axle (324) is securely mounted in the 24 second hole (323), and a second through hole (325) is axially defined in the second axle (324). A second axle pin (326) extends through the second through hole (325) and has two 2 ends respectively held by opposite sidewalk of the bracket (34). The constant force motor 3 spring (33) includes a strip which has a specific width and a specific thickness and has a 4 connector (331) formed on one end attached to the periphery of the first wheel (321 ). The S connector-(331 ) includes a neck (332) formed near the end to be engaged in a slot (327) 6 that is circumferentially defined in the periphery of the first wheel (321 ) to hold the 7 constant force motor spring (33) in place.
8 The bracket (34) includes a bottom (340), two sidewalls and an inverted U-shaped 9 cover (35) attached to the top portions of the two sidewalls to form a passage for receiving the lifting mechanism in the passage. The sidewall of the bracket (34) has two third through 11 holes (341) respectively defined to hold the first axle pin (313) and the second axle pin 12 (326). The axle pins (313, 326) in the preferred embodiment of the present invention are 13 rivets. It further can be a pin, a bolt with a nut or the like. Multiple ribs (342) extending 14 laterally out from each sidewall of the bracket (34), and a hooked lip (350) is formed laterally inward on the end ol'each sidewall of the cover (35). The hooked lip (350) 16 engages the rib (342) of the bracket (34) to hold the cover (35) in place.
The bottom (340) 17 of the bracket (34) includes two ends each having a tongue (343) extending from the end of 18 the bottom (340). The tongue (343) has a bore (344) defined to allow an attachment 19 member (345) to extend through the tongue (343) to attach the bracket to the frame (10).
The attachment member (345) is a rivet, a self=threading screw or a bolt with a nut.
21 With reference to I~igs. 1 and 4, in operation, the roller (31) will fully wind the 22 balance cord (12) when the slats (11) are lifted toward the frame (10).
Moreover, most of 23 the motor spring (33) is wound on the second wheel (322) and only enough of the motor 24 spring (33) is wound on the Iirst wheel (321) to attach the end of the spring (33) and to 1 provide the desired holding force. The slats (I l) are separated from one another when they 2 are in the lowered position and the balance cord (12) is unwound from the roller (31). Then 3 the slats (11) will be respectively suspended from straps (not shown) which are attached to 4 the frame ( 10) and controlled by the rotor (20), so that the weight of all the slats ( 11 ) does not bear by the constant force motor spring (33). Consequently, with the slats (11) lowered, 6 the motor spring (33) is substantially transferred from the second wheel (322) to the first 7 wheel (321 ), thereby decreasing the amount of force exerted on the slats ( 11 ). Therefore, 8 the reduced spring Force prevents the slats (l l) from self lilting.
9 When opening the cordless venetian blind, the slats (11) are lifted toward the frame ( 10), resulting in a spring driven rotation of the roller to wind up the balance cord ( 12). The 11 motor spring (;33) will wind back onto the second wheel (322), with a continually 12 increasing force as the weight of the slats ( 11 ) and accumulating slats ( 11 ) continues to 13 increase. The operation is finished when the Fig. 1 configuration is achieved.
14 With reference to Fig. 3 and 4, a brake plate (351 ) has one end attached to the top portion of the cover (35) and the other pressing the outer periphery of the roller (31) to 16 prevent the first wheel (321 ) (i~om sell=reversing. An adjusting bolt (352) is screwed 17 through the cover (35) to press the brake plate (351) and adjust the pressure between the 18 brake plate (352) and the roller (31).
19 With reference to 11 ig. 5, another embodiment of the brake plate (353) has one end attached to the cover (35) ~~nd the other extending to abut the side of the roller (31). The 21 brake plate (353) applies a side force to the roller (31) to prevent the roller (31) from 22 reversing too speedily.
23 With reference to Fig. 6, another embodiment of the lifting mechanism (40) in 24 accordance with the present invention leas two rotors (20) respectively mounted in opposite 1 ends of the frame (10). An axle (21) connects the two rotors (20). The lifting mechanism 2 (40) includes two rollers (41) and a balance wheel set (42). The balance wheel set (42) 3 includes a first wheel (421 ) co-axially mounted between the two rollers (41 ). The axle (21 ) 4 passes through the center of a hollow axle (43) that axially extends through the first wheel (421 ). The two rollers (4 I ) are respectively attached to opposite ends of the hollow axle 6 (43). The balance wheel set (42) includes a second wheel (422) mounted near the first 7 wheel (421 ) and a constant force motor spring (44) mounted between the first wheel (421 ) 8 and the second wheel (422). 'hhe motor spring (44) has one end attached the first wheel 9 (421 ) and the other wound on the second wheel (422). The operation of the embodiment is the same as the previously described prel-erred embodiment.
1 I Although the invention has been explained in relation to its preferred embodiment, 12 it is to be understood that many other possible modifications and variations can be made 13 without departing from the spirit and scope of the invention as hereinafter claimed.
6 Fig. 3 is an exploded perspective view of the lifting mechanism in Fig. 2 for a 7 cordless venetian blind;
8 Fig. 4 is a front cross sectional front plan view of the lifting mechanism for a 9 cordless venetian blind along line 4-4 in E'ig. 2;
Fig. 5 is side cross sectional view of another embodiment of the brake plate of the 11 lifting mechanism for a cordless venetian blind in accordance with the present invention;
12 and 13 Fig. 6 is a top plan view of another embodiment of the lifting mechanism for a 14 cordless venetian blind in accordance with the present invention.
BACKGROUND OF rfI-IE fNVEN~I'I~N
16 1. Field of the Invention 17 The present invention relates to a lifting mechanism, and more particularly to a 18 lifting mechanism for a cordless venetian blind.
19 2. Description of Related Art A conventional lifting mechanism for a cordless venetian blind in accordance with 21 the prior comprises a hollow frame mounted on the wall above the window. A
series of 22 slats parallel to the frame are mounted below the frame by two cords respectively attached 23 to opposite ends of the lowest blind. A rotor moves the series of slats from a horizontal 24 position to a nearly vertical position to selectively open and close the slats with respect to 1 the passage of light. A control device is mounted in the frame and has a cord with one end 2 attached to the lowest blind and the other passing through the control device for a user to 3 pull to open or close the venetian blind. It is an inconvenient design because the user's 4 hand must carry the weight of all of the slats when opening the conventional venetian blind.
6 The present invention has arisen to mitigate and/or obviate the disadvantages of 7 the conventional venetian blind.
9 The main objective of the present invention is to provide an improved lifting mechanism for a cordless venetian blind that makes the opening or closing of the venetian 11 blind easier and more convenient.
12 The lifting mechanism comprises a bracket to hold the lifting mechanism.
Two 13 rollers are respectively rotatably mounted in the bracket. A balance wheel set is mounted in 14 the bracket and includes a first wheel rotatably mounted between the two rollers and simultaneously rotated with the two rollers, and a second wheel rotatably mounted in the 1 G bracket near the first wheel. An S-shaped constant force motor spring is mounted between 17 the first wheel and the second wheel, and has a first end attached to a periphery of the first 18 wheel and a second end wound on the second wheel. Due to the constant force motor 19 spring, the cord is unnecessary and the cordless venetian blind can be opened or closed easily.
21 Further benefits and advantages of the present invention will become apparent 22 after a careful reading of the detailed description with appropriate reference to the 23 accompanying drawings.
24 D>~TAI D DF RIPTION I~ THIi INVENTION
With reference to the drawings and initially to Figs. 1 and 2, a cordless venetian 2 blind usually comprises a frame ( 10) securely attached to the wall, a rotor (20) mounted in 3 the frame (10) and a lifting mechanism (30) mounted in the frame (10). The frame (10) 4 includes a series of slats (11) each parallel to the frame (10) and mounted below the frame ( 10) by two balance cords ( 12) respectively attached to opposite ends of the lowest blind.
6 The rotor (20) moves the series of slats ( 11) from a horizontal position to a nearly vertical 7 position to selectively open and close the slats (11) with respect to the passage of light. The 8 rotor (20) is a well-known structure so it will not be described in detail.
9 The lifting mechanism (30) is mounted in a U-shaped bracket (34) that is attached to the frame (10). The lifting mechanism (30) includes two concentric rollers (31) and a 11 balance wheel set (32) each rotatably mounted in the bracket (34). The balance wheel set 12 (32) includes a first wheel (321) concentrically mounted between the two rollers (31) and 13 simultaneously rotated with the two rollers (31 ), and a second wheel (322) rotatably 14 mounted to correspond to the First wheel (321 ). An S-shaped constant force motor spring (33) is coupled between the first wheel (321) and the second wheel (322).
16 With reference to Digs. 2 and 3, in the preferred embodiment of the present 17 invention, the first wheel (321) and the two rollers (31) are integral. The first wheel (321) 18 has a diameter smaller than that of the two rollers (31 ). A first hole (310) is axially defined 19 in the rollers (31 ) and extends through the first wheel (321 ). A first axle (311 ) is securely mounted in the first hole (310), and a i7rst through hole (312) is axially defined in the first 21 axle (311 ). A f rst axle pin (313) extends through the first through hole (312) and has two 22 ends respectively held by opposite sidewalk of the bracket (34). A second hole (323) is 23 axially defined in the second wheel (322). A second axle (324) is securely mounted in the 24 second hole (323), and a second through hole (325) is axially defined in the second axle (324). A second axle pin (326) extends through the second through hole (325) and has two 2 ends respectively held by opposite sidewalk of the bracket (34). The constant force motor 3 spring (33) includes a strip which has a specific width and a specific thickness and has a 4 connector (331) formed on one end attached to the periphery of the first wheel (321 ). The S connector-(331 ) includes a neck (332) formed near the end to be engaged in a slot (327) 6 that is circumferentially defined in the periphery of the first wheel (321 ) to hold the 7 constant force motor spring (33) in place.
8 The bracket (34) includes a bottom (340), two sidewalls and an inverted U-shaped 9 cover (35) attached to the top portions of the two sidewalls to form a passage for receiving the lifting mechanism in the passage. The sidewall of the bracket (34) has two third through 11 holes (341) respectively defined to hold the first axle pin (313) and the second axle pin 12 (326). The axle pins (313, 326) in the preferred embodiment of the present invention are 13 rivets. It further can be a pin, a bolt with a nut or the like. Multiple ribs (342) extending 14 laterally out from each sidewall of the bracket (34), and a hooked lip (350) is formed laterally inward on the end ol'each sidewall of the cover (35). The hooked lip (350) 16 engages the rib (342) of the bracket (34) to hold the cover (35) in place.
The bottom (340) 17 of the bracket (34) includes two ends each having a tongue (343) extending from the end of 18 the bottom (340). The tongue (343) has a bore (344) defined to allow an attachment 19 member (345) to extend through the tongue (343) to attach the bracket to the frame (10).
The attachment member (345) is a rivet, a self=threading screw or a bolt with a nut.
21 With reference to I~igs. 1 and 4, in operation, the roller (31) will fully wind the 22 balance cord (12) when the slats (11) are lifted toward the frame (10).
Moreover, most of 23 the motor spring (33) is wound on the second wheel (322) and only enough of the motor 24 spring (33) is wound on the Iirst wheel (321) to attach the end of the spring (33) and to 1 provide the desired holding force. The slats (I l) are separated from one another when they 2 are in the lowered position and the balance cord (12) is unwound from the roller (31). Then 3 the slats (11) will be respectively suspended from straps (not shown) which are attached to 4 the frame ( 10) and controlled by the rotor (20), so that the weight of all the slats ( 11 ) does not bear by the constant force motor spring (33). Consequently, with the slats (11) lowered, 6 the motor spring (33) is substantially transferred from the second wheel (322) to the first 7 wheel (321 ), thereby decreasing the amount of force exerted on the slats ( 11 ). Therefore, 8 the reduced spring Force prevents the slats (l l) from self lilting.
9 When opening the cordless venetian blind, the slats (11) are lifted toward the frame ( 10), resulting in a spring driven rotation of the roller to wind up the balance cord ( 12). The 11 motor spring (;33) will wind back onto the second wheel (322), with a continually 12 increasing force as the weight of the slats ( 11 ) and accumulating slats ( 11 ) continues to 13 increase. The operation is finished when the Fig. 1 configuration is achieved.
14 With reference to Fig. 3 and 4, a brake plate (351 ) has one end attached to the top portion of the cover (35) and the other pressing the outer periphery of the roller (31) to 16 prevent the first wheel (321 ) (i~om sell=reversing. An adjusting bolt (352) is screwed 17 through the cover (35) to press the brake plate (351) and adjust the pressure between the 18 brake plate (352) and the roller (31).
19 With reference to 11 ig. 5, another embodiment of the brake plate (353) has one end attached to the cover (35) ~~nd the other extending to abut the side of the roller (31). The 21 brake plate (353) applies a side force to the roller (31) to prevent the roller (31) from 22 reversing too speedily.
23 With reference to Fig. 6, another embodiment of the lifting mechanism (40) in 24 accordance with the present invention leas two rotors (20) respectively mounted in opposite 1 ends of the frame (10). An axle (21) connects the two rotors (20). The lifting mechanism 2 (40) includes two rollers (41) and a balance wheel set (42). The balance wheel set (42) 3 includes a first wheel (421 ) co-axially mounted between the two rollers (41 ). The axle (21 ) 4 passes through the center of a hollow axle (43) that axially extends through the first wheel (421 ). The two rollers (4 I ) are respectively attached to opposite ends of the hollow axle 6 (43). The balance wheel set (42) includes a second wheel (422) mounted near the first 7 wheel (421 ) and a constant force motor spring (44) mounted between the first wheel (421 ) 8 and the second wheel (422). 'hhe motor spring (44) has one end attached the first wheel 9 (421 ) and the other wound on the second wheel (422). The operation of the embodiment is the same as the previously described prel-erred embodiment.
1 I Although the invention has been explained in relation to its preferred embodiment, 12 it is to be understood that many other possible modifications and variations can be made 13 without departing from the spirit and scope of the invention as hereinafter claimed.
Claims (10)
1. A lifting mechanism for a cordless venetian blind that has a bracket provided to hold the lifting mechanism, comprising:
two rollers each adapted to be rotatably mounted in the bracket to respectively wind a balance cord when the cordless venetian blind is lifted to open;
a balance wheel set adapted to be mounted in the bracket and including:
a first wheel rotatably mounted between the two rollers by a first axle pin rotatably extending through the two rollers and the first wheel, the first axle pin adapted to be attached to the bracket to hold the two rollers and the first wheel in place, and the first wheel simultaneously rotated with the two rollers; and a second wheel adapted to be pivotally mounted in the bracket near the first wheel by a second axle pin rotatably extending the second wheel, the second axle pin attached to the bracket to hold the second wheel in place; and an S-shaped constant force motor spring mounted between the first wheel and the second wheel, the S-shaped constant force motor spring having a first end attached to a periphery of the first wheel and a second end wound on the second wheel, the S-shaped constant force motor spring having a strip that has a specific width and a specific thickness so as to provide a certain force to the lifting mechanism for winding the balance cord when the cordless venetian blind is lifted to open;
two rollers each adapted to be rotatably mounted in the bracket to respectively wind a balance cord when the cordless venetian blind is lifted to open;
a balance wheel set adapted to be mounted in the bracket and including:
a first wheel rotatably mounted between the two rollers by a first axle pin rotatably extending through the two rollers and the first wheel, the first axle pin adapted to be attached to the bracket to hold the two rollers and the first wheel in place, and the first wheel simultaneously rotated with the two rollers; and a second wheel adapted to be pivotally mounted in the bracket near the first wheel by a second axle pin rotatably extending the second wheel, the second axle pin attached to the bracket to hold the second wheel in place; and an S-shaped constant force motor spring mounted between the first wheel and the second wheel, the S-shaped constant force motor spring having a first end attached to a periphery of the first wheel and a second end wound on the second wheel, the S-shaped constant force motor spring having a strip that has a specific width and a specific thickness so as to provide a certain force to the lifting mechanism for winding the balance cord when the cordless venetian blind is lifted to open;
2. The lifting mechanism for a cordless venetian blind as claimed in claim 1, wherein the first wheel and the two rollers are formed integrally.
3. The lifting mechanism for a cordless venetian blind as claimed in claim 1, wherein the first axle pin is a rivet.
4. The lifting mechanism for a cordless venetian blind as claimed in claim 1, wherein the second axle pin is a rivet.
5. The lifting mechanism for a cordless venetian blind as claimed in claim 1, wherein a first hole is axially defined in the first wheel and the two rollers, for securely receiving a first axle therein, a first through hole is axially defined in the first axle to allow the first axle pin to pivotally extend through the first axle, and a second hole is axially defined in the second wheel for securely receiving a second axle therein, a second through hole axially defined in the second axle to allow the second axle pin to rotatably extend through the second axle.
6. The lifting mechanism for a cordless venetian blind as claimed in claim 1 further comprising a cover adapted to be attached to the bracket to form a passage for receiving the lifting mechanism therein.
7. The lifting mechanism for a cordless venetian blind as claimed in claim 6, wherein the bracket is U-shaped and the cover is an inverted U-shape, the bracket and the cover each having two sidewalk coupled to each other, the sidewalk of the bracket each having multiple ribs laterally extending out and the ends of the sidewalls of the cover each having a hooked lip longitudinally extending to clamp the ribs of the bracket to hold the cover in place.
8. The lifting mechanism for a cordless venetian blind as claimed in claim 7, wherein the cover has a top portion connecting the two sidewalk of the cover, and a brake plate has a first end attached to the cover and a second end abutting the roller to prevent the roller from self-reversing.
9. The lifting mechanism for a cordless venetian blind as claimed in claim 8, wherein the second end of the brake plate abuts an outer periphery of the roller and an
10 adjusting bolt is screwed through the top portion of the cover to abut the brake plate to adjust the pressure between the brake plate and the roller.
10. The lifting mechanism for a cordless venetian blind as claimed in claim 8, wherein the second end of the brake plate abuts one side of a corresponding one of the rollers.
10. The lifting mechanism for a cordless venetian blind as claimed in claim 8, wherein the second end of the brake plate abuts one side of a corresponding one of the rollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2332702 CA2332702A1 (en) | 2001-01-29 | 2001-01-29 | Lifting mechanism for a cordless venetian blind |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2332702 CA2332702A1 (en) | 2001-01-29 | 2001-01-29 | Lifting mechanism for a cordless venetian blind |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2332702A1 true CA2332702A1 (en) | 2002-07-29 |
Family
ID=4168207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2332702 Abandoned CA2332702A1 (en) | 2001-01-29 | 2001-01-29 | Lifting mechanism for a cordless venetian blind |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2332702A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9650829B2 (en) | 2006-10-25 | 2017-05-16 | Hunter Douglas, Inc. | Cord drive for coverings for architectural openings |
| CN110242197A (en) * | 2019-07-03 | 2019-09-17 | 安徽宝盈家居有限公司 | A kind of anti-bias formula venetian blind of gravitational equilibrium |
-
2001
- 2001-01-29 CA CA 2332702 patent/CA2332702A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9650829B2 (en) | 2006-10-25 | 2017-05-16 | Hunter Douglas, Inc. | Cord drive for coverings for architectural openings |
| US11111721B2 (en) | 2006-10-25 | 2021-09-07 | Hunter Douglas Inc. | Cord drive for coverings for architectural openings |
| US12049787B2 (en) | 2006-10-25 | 2024-07-30 | Hunter Douglas Inc. | Cord drive for coverings for architectural openings |
| CN110242197A (en) * | 2019-07-03 | 2019-09-17 | 安徽宝盈家居有限公司 | A kind of anti-bias formula venetian blind of gravitational equilibrium |
| CN110242197B (en) * | 2019-07-03 | 2024-04-26 | 安徽宝盈家居有限公司 | Gravity balanced anti-deflection shutter curtain |
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