U.S. patent application number 11/526064 was filed with the patent office on 2007-07-05 for blind body collecting-expanding control device for window blinds.
This patent application is currently assigned to CHING FENG HOME FASHIONS CO., LTD.. Invention is credited to Sheng Ying Hsu, Wen Ying Liang, Wu Chung Nien.
Application Number | 20070151675 11/526064 |
Document ID | / |
Family ID | 37564595 |
Filed Date | 2007-07-05 |
United States Patent
Application |
20070151675 |
Kind Code |
A1 |
Nien; Wu Chung ; et
al. |
July 5, 2007 |
Blind body collecting-expanding control device for window
blinds
Abstract
A blind body collecting-expanding control device for window
blinds comprises a head rail, a bottom rail, a cord-winding control
device, a transmission assembly, and a blind body wherein the head
rail has an accommodating channel defining one end thereon to
receive the cord-winding control device therein. The cord-winding
control device links in movement to the transmission assembly
composed of support seats, a winding shaft, lift cords, an
operational cord, and a sliding element so that the blind body can
be easily actuated thereby to collect upwards or expand downwards
in operation. Via the aforementioned structure, the pushing or
pulling force exerted by hands reciprocally interacts with the
cord-winding control device so that a user can freely adjust the
blind body into a desirable position, achieving the best adjustment
effect as well as easy and speedy assembly thereof.
Inventors: |
Nien; Wu Chung; (Changhua
Hsien, TW) ; Hsu; Sheng Ying; (Changhua Hsien,
TW) ; Liang; Wen Ying; (Changhua Hsien, TW) |
Correspondence
Address: |
TROXELL LAW OFFICE PLLC
SUITE 1404
5205 LEESBURG PIKE
FALLS CHURCH
VA
22041
US
|
Assignee: |
CHING FENG HOME FASHIONS CO.,
LTD.
|
Family ID: |
37564595 |
Appl. No.: |
11/526064 |
Filed: |
September 25, 2006 |
Current U.S.
Class: |
160/84.05 |
Current CPC
Class: |
E06B 9/30 20130101; E06B
9/322 20130101; E06B 9/62 20130101 |
Class at
Publication: |
160/084.05 |
International
Class: |
A47H 5/00 20060101
A47H005/00 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 2, 2005 |
TW |
094218929 |
Claims
1. A blind body collecting-expanding control device for window
blinds, comprising a cord-winding control device and a transmission
assembly that are respectively received into an accommodating
channel of a head rail wherein the transmission assembly is
equipped with multiple lift cords reciprocally working with an
operational cord so that the lift cords and the operational cord
can be actuated to recoil or release via the transmission assembly
and the constant torques generated by the cord-winding control
device thereof; besides, the lift cords are led through the blind
body to fixedly attach to a bottom rail; therefore, the blind body
is correspondingly linked in movement to the cord-winding control
device and the transmission assembly, and synchronically actuated
by the lift cords either recoiled or released to collect upwards or
expand downwards accordingly in operation.
2. The blind body collecting-expanding control device for window
blinds as claimed in claim 1 wherein the cord-winding control
device is equipped with a set of upper and lower housings, a rotary
seat, and torsion springs.
3. The blind body collecting-expanding control device for window
blinds as claimed in claim 2 wherein the lower housing is
identically shaped like the upper housing, and set in reverse
directions therewith; besides, the upper and lower are respectively
provided with male/female reciprocal conjoining sections and
symmetrical portions to be closed up and joined to each other.
4. The blind body collecting-expanding control device for window
blinds as claimed in claim 2 wherein the upper and lower housings
are respectively equipped with a set of stop seats symmetrically
extending at both lateral side edges thereon wherein one stop seat
has an insert hook extending at the top surface thereon, and the
other stop seat has a recess indented at the outer wall
corresponding to the position of the insert hook thereof; the two
stop seats surround an annular groove with a central shaft, and a
set of positioning arcuate grooves therein wherein positioning rods
are symmetrically disposed protruding at the four corners along the
outer circumferential edge of the annular groove thereon.
5. The blind body collecting-expanding control device for window
blinds as claimed in claim 2 wherein the rotary seat has a
cylindrical actuation body extending at one side, and the
cylindrical actuation body is equipped with a counter-winding
surface with a set of indented fixing holes defining thereon; a
coiling surface equipped with a roller seat is disposed extending
at the other side of the rotary seat wherein a stop portion with a
central opening extending in the middle is attached to one side of
the coiling surface, and an abutment face is formed at the
conjoining section of the counter-winding surface and the coiling
surface thereof, permitting the counter-winding surface to
precisely mount to the central shaft and the abutment face to
accurately locate in place astride onto the positioning rods
thereon.
6. The blind body collecting-expanding control device for window
blinds as claimed in claim 5 wherein the actuation body thereof is
shaped in a cylindrical configuration.
7. The blind body collecting-expanding control device for window
blinds as claimed in claim 1 wherein the transmission assembly is
composed of support seats, a winding shaft, lift cords, an
operational cord, and a sliding element.
8. The blind body collecting-expanding control device for window
blinds as claimed in claim 7 wherein the support seats are
respectively equipped with a guide passage disposed at one side for
the extension of the winding shaft there-through.
9. The blind body collecting-expanding control device for window
blinds as claimed in claim 1 wherein the lift cords and the
operational cord can be made of strap bodies.
10. The blind body collecting-expanding control device for window
blinds as claimed in claim 1 wherein the lift cords and the
operational cord can also be made of cable ropes.
11. The blind body collecting-expanding control device for window
blinds as claimed in claim 2 wherein the torsion springs of the
cord-winding control device can be flexibly set into one or more
than one, depending on the size of the blind body.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a blind body
collecting-expanding control device for window blinds wherein a
cord-winding control device equipped with torsion springs is
utilized to interact with the pushing or pulling force exerted by
hands onto a bottom rail to loosen or tighten lift cords coiled
onto a winding shaft, forming a counter-balance there-between so
that a user can freely adjust the blind body into a desirable
position without hurting the hands in operation, achieving the best
adjustment effect as well as speedy assembly thereby.
[0002] A conventional window blinds structure includes a blind
body, a transmission assembly, and pull cords drawn by force of
hands to adjust the position of the blind body thereby. In
operation, due to the small frictional surface of the cord bodies
thereof, the pull cords tend to rub against the hands or abrade the
hands directly contacting with them. Furthermore, to adjust the
blind body into an expanded or collected position, the blind body
becomes difficult to be accurately positioned in a desirable
position in case of an excessive down-pulling force exerted onto
the pull cords or a sudden release of the pull cords at great
speed. As a result, the adjustment process must be repeated over
again, which is quite inconvenient in operation.
SUMMARY OF THE PRESENT INVENTION
[0003] It is, therefore, the primary purpose of the present
invention to provide a blind body collecting-expanding control
device for window blinds wherein pushing or pulling force of hands
cooperatively works with the elasticity generated by torsion
springs of a cord-winding control device so that a user can freely
adjust a blind body into a desirable position without hurting or
abrading the hands in operation thereof, achieving the best state
of application thereby.
[0004] It is, therefore, the second purpose of the present
invention to provide a blind body collecting-expanding control
device for window blinds wherein, via the pushing or pulling force
exerted by hands to interact with the elasticity generated by the
torsion springs of the cord-winding control device, the blind body
can be accurately adjusted by hands to reach a desirable collected
or expanded position without the inconvenient process of repeated
adjustment as found in the application of the conventional pull
cords above, achieving more accurate and simpler operation as well
as assembly thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] FIG. 1 is an exploded perspective view of the present
invention.
[0006] FIG. 2 is an exploded perspective view of a cord-winding
control device of the present invention.
[0007] FIG. 3 is an assembled perspective view of the present
invention.
[0008] FIG. 4 is a partially enlarged and assembled view of the
present invention.
[0009] FIG. 5 is a rear side view of torsion springs assembled onto
a rotary seat of the cord-winding control device of the present
invention.
[0010] FIG. 6 is a diagram showing a blind body of the present
invention expanded downwards.
[0011] FIG. 7 is a diagram showing the blind body of the present
invention collected upwards.
[0012] FIG. 8 is an assembled view of another embodiment of the
present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0013] Please refer to FIG. 1 showing an exploded perspective view
of the present invention. The present invention relates to a blind
body collecting-expanding control device for window blinds,
comprising a head rail 10, a bottom rail 20, a cord-winding control
device 30, a transmission assembly 40, and a blind body 50. The
head rail 10 has an accommodating channel 11 defining at one end
thereon, and the cord-winding control device 30 (referring to FIG.
2) is equipped with a set of upper and lower housings 31, 31', a
rotary seat 32, and two torsion springs 33. The upper and lower
housings 31, 31' are respectively provided with male/female
reciprocal conjoining sections and symmetrical portions that are
capable of reciprocally joining to each other to form an enclosed
positioning box thereby. The lower housing 31' is identically
shaped like the upper housing 31, and set in reverse directions
therewith so that the upper and lower housings 31, 31' can be
placed in reverse to precisely close up onto each other. The upper
housing 31, shaped in a U-shaped elongated groove, is equipped with
a set of stop seats 311, 312 that, each defined by an arcuate inner
wall, symmetrically extend at both lateral side edges thereon
wherein one stop seat 311 has an insert hook 313 extending at the
top surface thereon, and the other stop seat 312 has a recess 314
defining the outer wall to correspond to the position of the insert
hook 313 thereof. The two stop seats 312 surround a shallow
stepwise annular groove 315 defining the middle section of the
upper housing 31. The annular groove 315 has a central shaft 316
extending upwards in the middle thereon. A protruding post 3161 and
a bore 3162 are disposed on the top surface of the central shaft
316 thereon. Positioning rods 317 are symmetrically provided
protruding at the four corners along the outer circumferential edge
of the annular groove 315 thereon wherein the positioning rods 317
are respectively corresponded to the two stop seats 311, 312 to
define two positioning arcuate grooves 3171 thereby. The two
positioning arcuate grooves 3171 are respectively provided with an
axle 318, 319 protruding upwards in the middle thereon wherein one
axle 318 has a grooved hole 3181 defining the top surface thereon,
while the other axle 319 has a protrusive rib 3191 extending at the
counterpart top surface thereon. The rotary seat 32 is made up of a
cylindrical actuation body 321 extending at one side, and the
cylindrical actuation body 321 is equipped with a counter-winding
surface 323 with fixing holes 322 defining thereon. A coiling
surface 324 equipped with a roller seat is provided extending at
the other side of the rotary seat 32. A stop portion 326 with a
central opening 327 extending in the middle is attached to one side
of the coiling surface 324, and an abutment face 325 is formed at
the conjoining section of the counter-winding surface 323 and the
coiling surface 324 thereof. Thus, the counter-winding surface 323
of the rotary seat 32 is allowed to mount to the central shaft 316
with the abutment face 325 precisely located in place astride onto
the positioning rods 317 thereon. The transmission assembly 40 is
composed of support seats 41, 42, a winding shaft 43, lift cords
44, an operational cord 45, and a sliding element 46. The support
seats 41, 42 are respectively equipped with a guide passage 411,
421 at one side for the extension of the winding shaft 43
there-through. The lift cords 44 and the operational cord 45 can be
made of strap bodies or cable ropes, etc.
[0014] Please refer to FIG. 3 accompanied by FIG. 4. In assembly,
the upper and lower housings 31, 31' of the cord-winding control
device 30 are correspondingly put in reverse to each other, and the
two torsion springs 33 are respectively attached to the actuation
body 321 of the rotary seat 32 via inverted hooked portions
disposed at the coupling end thereon to be firmly hooked to the
fixing holes 322 defining both sides of the counter-winding surface
323 so that the two torsion springs 33 are allowed to juxtapose in
parallel and operate in a reversible S-shaped rotation as shown in
FIG. 5. Then, the two torsion springs 33 are respectively mounted
to the axles 318, 319 extending at the two positioning arcuate
grooves 3171 of the lower housing 31', and the actuation body 321
of the rotary seat 32 is coupled with the central shaft 316 of the
annular groove 315, permitting the abutment face 325 of the rotary
seat 32 to locate in place astride onto the positioning rods 317
and restrict one side edge of the two parallel torsion springs 33.
Then, the upper housing 31 is covered on top of the lower housing
31', permitting the male/female conjoining sections and symmetrical
portions of the upper and lower housings 31, 31' thereof to
reciprocally couple with each other and complete the assembly of
the cord-winding control device 30. The cord-winding control device
30 is fixedly mounted into the accommodating channel 11, and the
support seats 41, 42 are spaced out in appropriate distance and
firmly located into the head rail 10. Via the guide passages 411,
421, the winding shaft 43 is mounted to hold between the support
seats 41, 42 and capable of rolling thereon. The operational cord
45 is applied to wind through the sliding element 46 of the support
seat 42 and the rotary seat 32 to provide sliding guidance
there-between. Then, depending on their respectively positions led
through the blind body 50, the two lift cords 44 are guided to coil
around both end sides of the winding shaft 43, each located at one
side of the two support seats 41, 42. The lift cords mounted to the
head rail 10 and the blind body 50 are respectively fixed to the
bottom rail 20 thereon. And the operational cord 45, attached to
one end of the winding shaft 43 at one side, is guided to wind
through the sliding element 46 before fixedly attached to the
coiling surface 324 at the other end thereof.
[0015] In operation, when the blind body 50 (referring to FIG. 6)
is to be expanded downwards, the bottom rail 20 is pulled downwards
by the force of hands, and the lift cords 44 will be drawn
downwards to actuate the rotation of the winding shaft 43
therewith. Then, the winding shaft 43 will spin to the right to
release the lift cords 44, and the operational cord 45 will run
through the sliding element 46 to coil up at one end of the winding
shaft 43 thereon. Meanwhile, the operational cord 45 will actuate
the coiling surface 324, permitting the actuation body 321 to
revolve in counterclockwise rotation. The two torsion springs 33
arranged in parallel to augment the elasticity thereby will be
affected by the pulling force of the actuation body 321 to revolve
in a reverse S-shaped movement with a constant torque naturally
occurred and to counter wind tight onto the counter-winding surface
323 thereon. Then, the constant torque occurred works in a linear
operation and the torque will not be altered due to the increase of
the coils wound, reinforcing the strengthen of the blind body 50
affected by the pulling force to achieve efficient suspension
thereby.
[0016] When the blind body 50 (referring to FIG. 7) is to be
collected upwards, the bottom rail 20 is pushed upwards by the
force of hands, and the torsion springs 33 counter-wound onto the
counter-winding surface 323 thereon will be released to naturally
recoil backwards, permitting the actuation body 321 to spin in
clockwise rotation with a constant torque occurred at the same
time. Then, the operational cord 45 coiled onto the winding shaft
43 will run through the sliding element 46 to rewind onto the
coiling surface 324 thereon, and synchronically actuate the winding
shaft 43 to spin to the left so as to wind upwards the lift cords
44 and collect the blind body 50 thereby. Therefore, the pushing
and pulling force exerted by hands cooperatively interacts with the
cord-winding control device 30 to generate constant torques and
actuate movements in an easy manner without the hands getting
abraded by the pull cords of the conventional window blind
structure so that a user can freely adjust the blind body 50 into a
desirable position, achieving the best application state
thereby.
[0017] Please refer to FIG. 8 showing an assembled view of another
embodiment of the present invention. To be installed into a
smaller-size blind body 50, the cord-winding control device 30 can
have one of the two parallel torsion springs 33 directly dismantled
and removed there-from before mounted into the accommodating
channel 11 of the head rail 10, permitting the blind body 50 to be
collected or expanded in the same natural manner.
* * * * *