U.S. patent application number 13/176938 was filed with the patent office on 2013-01-10 for cordless window curtain.
This patent application is currently assigned to CHING FENG HOME FASHIONS CO., LTD.. Invention is credited to Ming-Zhu Chiang, Chien-Chih Huang.
Application Number | 20130008616 13/176938 |
Document ID | / |
Family ID | 47437931 |
Filed Date | 2013-01-10 |
United States Patent
Application |
20130008616 |
Kind Code |
A1 |
Huang; Chien-Chih ; et
al. |
January 10, 2013 |
CORDLESS WINDOW CURTAIN
Abstract
A cordless window curtain has a window curtain rod, a curtain
body, lateral rails, a locating rope assembly and an elastic
tension component. The reducing guide slots are set at one side of
the lateral rails facing the curtain body and connected with the
hollow slot. The width of the reducing guide slot must be smaller
than that of the lateral rail and the width of the reducing guide
slot is preferably between 2 mm and 5.9 mm. Two flanged guide
shafts are protruded from both ends of the hollow bottom rod of the
curtain body. These two flanged guide shafts are provided with a
through-hole for threading of two lower locating sections of the
locating rope assembly. The outer end of two flanged guide shafts
is inserted into the reducing guide slot, such that the flanged
guide shaft can slide vertically along the path of the reducing
guide slot.
Inventors: |
Huang; Chien-Chih;
(Chang-Hwa, TW) ; Chiang; Ming-Zhu; (Chang-Hwa,
TW) |
Assignee: |
CHING FENG HOME FASHIONS CO.,
LTD.
Chang-Hwa
TW
|
Family ID: |
47437931 |
Appl. No.: |
13/176938 |
Filed: |
July 6, 2011 |
Current U.S.
Class: |
160/84.01 ;
160/340 |
Current CPC
Class: |
E06B 2009/3222 20130101;
E06B 9/32 20130101; E06B 9/327 20130101 |
Class at
Publication: |
160/84.01 ;
160/340 |
International
Class: |
A47H 23/04 20060101
A47H023/04; A47H 5/032 20060101 A47H005/032 |
Claims
1. A cordless window curtain comprising: a window curtain rod,
transversely arranged rodlike, comprising of a hollow chamber and
at least two assembly elements; a curtain body, hung vertically at
the bottom of the window curtain rod in an elevatable state; the
curtain body is provided with multiple rope-pulling holes arranged
vertically; and a hollow bottom rod is assembled at the bottom of
the curtain body; two lateral rails, set at both sides of the
curtain body in a vertical extension state; a hollow slot is formed
within the lateral rail, and a rope head locating seat is set at
bottom of the lateral rail; a locating rope assembly, comprising of
an upper locating section, two curtain body threading sections and
two lower locating sections; of which the upper locating section is
accommodated into the hollow chamber of the window curtain rod,
allowing for hanging securely the upper end of the locating rope
assembly; two curtain body threading sections are located at
interval, and extended vertically into the rope-pulling holes of
the curtain body; two lower locating sections are joined reversely
and extended into the hollow bottom rod at bottom of the curtain
body; besides, the ends of two lower locating sections are fixed
separately onto the rope head locating seat of two lateral rails,
so as to form the lower fixing point of the locating rope assembly;
an elastic tension component, set onto the upper locating section
of the locating rope assembly, and used to keep the locating rope
assembly in certain elastic tension; two reducing guide slots, set
at one side of two lateral rails facing the curtain body and
connected with the hollow slot; the width of the reducing guide
slot being smaller than that of the lateral rail; and the width of
the reducing guide slot is preferably between 2 mm and 5.9 mm; two
flanged guide shafts, protruded from left and right ends of the
hollow bottom rod of the curtain body; these two flanged guide
shafts are provided with a through-hole for threading of two lower
locating sections of the locating rope assembly; and the outer end
of two flanged guide shafts is inserted into the reducing guide
slot of two lateral rails, such that the flanged guide shaft can
slide vertically along the path of the reducing guide slot.
2. The structure defined in claim 1, wherein said curtain body is a
shutter or a folding window curtain.
3. The structure defined in claim 1, wherein the assembly element
of said window curtain rod is a rotary fastener, which comprises of
a holding box and a fastening plate; the holding box is provided
with a holding space and an assembly inlet set at one side of the
holding space, such that the end of the window curtain rod can be
assembled into the holding space through the assembly inlet; a
locating hole is set at least one side of the holding box; the
fastening plate is pivoted at one side of the holding box with
assembly inlet; and the fastening plate can swing in an opening
state, or is covered onto the assembly inlet in a closing state;
moreover, male and female locking portions that can be interlocked
together are set on the fastening plate and holding box, such that
the closing state of the fastening plate can be positioned.
Description
CROSS-REFERENCE TO RELATED U.S. APPLICATIONS
[0001] Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] Not applicable.
NAMES OF PARTIES TO A JOINT RESEARCH AGREEMENT
[0003] Not applicable.
REFERENCE TO AN APPENDIX SUBMITTED ON COMPACT DISC
[0004] Not applicable.
BACKGROUND OF THE INVENTION
[0005] 1. Field of the Invention
[0006] The present invention relates generally to a window curtain,
and more particularly to an innovative one which allows the
cordless window curtain to be set on lateral rails.
[0007] 2. Description of Related Art
[0008] Including Information Disclosed Under 37 CFR 1.97 and 37 CFR
1.98.
[0009] The difference between the cordless window curtain of the
present invention and common rope-pulling window curtain lies in
that the curtain body is elevated manually by the force applied by
the user. The curtain body is stopped once the force applied by the
user is released. Such a cordless window curtain is designed in
such a manner that the pull rope for pulling and controlling the
curtain body is concealed to prevent any safety hazard against kids
arising from accidental entanglement during play.
[0010] Moreover, according to the design of the driving mechanism
for the curtain body of said cordless window curtain, the
rope-pulling device cannot be fully eliminated, and a rail is
generally arranged to provide a holding space for the pull rope
exposed at both sides of the curtain body. Yet, the following
shortcomings still remain with respect to said cordless window
curtain with lateral rails:
[0011] The cross section of the lateral rail of the conventional
cordless window curtain is designed into a -shaped pattern, such
that an opening is set at one side facing the curtain body. This
opening is almost as wide as the lateral rail, generally from 2.5
cm to 3.5 cm. However, small fingers of kids could extend easily
into the lateral rail from the opening, and are then hooked by the
pull rope exposed at both sides of the curtain body, leading to
possible safety hazards.
[0012] On the other hand, owing to a bigger opening set on the
lateral rail, the curtain body of the conventional cordless window
curtain could not be stably limited or driven, resulting in
unstable shift and bigger noise of the curtain body.
[0013] Thus, to overcome the aforementioned problems of the prior
art, it would be an advancement if the art to provide an improved
structure that can significantly improve the efficacy.
[0014] Therefore, the inventor has provided the present invention
of practicability after deliberate design and evaluation based on
years of experience in the production, development and design of
related products.
BRIEF SUMMARY OF THE INVENTION
[0015] The enhanced efficacy of the present invention is as
follows:
[0016] Based on the unique configuration of the present invention
wherein "the improved structure of cordless window curtain" allows
said reducing guide slots to be set at one side of the lateral rail
facing the curtain body, and the flanged guide shafts protruded
from both ends of the hollow bottom rod at bottom of the curtain
body can be inserted into said reducing guide slot, the present
invention could, through narrowing design of the reducing guide
slot, protect efficiently kids against unexpected insertion of
fingers into the locating rope assembly. On the other hand, owing
to the technical feature that the flanged guide shafts are inserted
into said reducing guide slot, the curtain body could be elevated
more smoothly and stably, and also positioned securely in the
hanging state, thus improving the quality and applicability of the
cordless window curtain.
[0017] The improvements brought about by this invention are as
follow:
[0018] Given the structural configuration wherein the assembly
element is designed into a rotary fastener, the cordless window
curtain can be easily assembled or disassembled in a timely and
efficient manner.
[0019] Although the invention has been explained in relation to its
preferred embodiment, it is to be understood that many other
possible modifications and variations can be made without departing
from the spirit and scope of the invention as hereinafter
claimed.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0020] FIG. 1 is an assembled perspective view of the preferred
embodiment of the present invention.
[0021] FIG. 2 is a partial exploded perspective view of the
preferred embodiment of the present invention.
[0022] FIG. 3 is a partial assembled sectional view of the
preferred embodiment of the present invention.
[0023] FIG. 4 is an enlarged view of the assembly elements of the
present invention along with the assembly view.
[0024] FIG. 5 is a plan front view of the cordless window curtain
of the present invention.
[0025] FIG. 6 is a schematic view of the present invention wherein
the curtain body is elevated in a pushing state.
DETAILED DESCRIPTION OF THE INVENTION
[0026] FIGS. 1, 2, 3 depict preferred embodiments of a cordless
window curtain of the present invention, which, however, are
provided for only explanatory objective for patent claims. Said
cordless window curtain A includes a window curtain rod 10,
transversely arranged rodlike, comprising of a hollow chamber 11
and at least two assembly elements 12. In this preferred
embodiment, the window curtain rod 10 is designed with a -shaped
profile, and not limited to this. Said assembly elements 12 are
used for assembling the window curtain rod 10 onto a preset object
(e.g.: wall and window frame).
[0027] A curtain body 20 is hung vertically at the bottom of the
window curtain rod 10 in an elevatable state. The curtain body 20
is provided with multiple rope-pulling holes 21 arranged
vertically. A hollow bottom rod 22 is assembled at the bottom of
the curtain body 20. The curtain body 20 is designed into either a
shutter or a folding window curtain. The curtain body 20 disclosed
in FIGS. 1-6 of the preferred embodiment is designed into a
shutter.
[0028] Two lateral rails 30 are set at both sides of the curtain
body 20 in a vertical extension state. A hollow slot 31 is formed
within the lateral rail 30, and a rope head locating seat 32 is set
at bottom of the lateral rail 30.
[0029] A locating rope assembly 40 has an upper locating section
41, two curtain body threading sections 42 and two lower locating
sections 43. Of which, the upper locating section 41 is
accommodated into the hollow chamber 11 of the window curtain rod
10, allowing for hanging securely the upper end of the locating
rope assembly 40. Two curtain body threading sections 42 are
located at interval, and extended vertically into the rope-pulling
holes 21 of the curtain body 20. Two lower locating sections 43 are
joined reversely and extended into the hollow bottom rod 22 at
bottom of the curtain body 20. The ends 430 of two lower locating
sections 43 (only marked in FIG. 2) are fixed separately onto the
rope head locating seat 32 of two lateral rails 30, so as to form
the lower fixing point of the locating rope assembly 40. The hollow
bottom rod 22 could be supported specifically by the reverse joint
of two lower locating section 43. When the hollow bottom rod 22 is
shifted to any height or position by the force applied by the user,
it could be positioned there even if the force is released.
[0030] An elastic tension component 50 is set onto the upper
locating section 41 of the locating rope assembly 40, and used to
keep the locating rope assembly 40 in certain elastic tension so as
to realize the aforementioned supporting. Said elastic tension
component 50 is made of a helical spring.
[0031] Two reducing guide slots 60 are set at one side of two
lateral rails 30 facing the curtain body 20 and connected with the
hollow slot 31. The width of the reducing guide slot 60 (W1) must
be smaller than that of the lateral rail 30 (W2), as marked in FIG.
3. The width of the reducing guide slot 60 is preferably between 2
mm and 5.9 mm.
[0032] Two flanged guide shafts 70 are protruded from left and
right ends of the hollow bottom rod 22 at bottom of the curtain
body 20. These two flanged guide shafts 70 are provided with a
through-hole 71 for threading of two lower locating sections 43 of
the locating rope assembly. The outer end of two flanged guide
shafts 70 is inserted into the reducing guide slot 60 of two
lateral rails 30 (marked in FIG. 3), such that the flanged guide
shaft can slide vertically along the path of the reducing guide
slot 60.
[0033] Referring to FIG. 4, the assembly element 12 of the window
curtain rod 10 is designed into a rotary fastener, which comprises
of a holding box 121 and a fastening plate 122. The holding box 121
is provided with a holding space 123 and an assembly inlet 124 set
at one side of the holding space 123, such that the end of the
window curtain rod 10 can be assembled into the holding space 123
through the assembly inlet 124. A locating hole 125 is set at least
one side of the holding box 121. The fastening plate 122 is pivoted
at one side of the holding box 121 with assembly inlet 124. The
fastening plate 122 can swing in an opening state, or is covered
onto the assembly inlet 124 in a closing state. Moreover, a male
locking portion 126 (a semi-circular salient point) and a female
locking portion 127 (a round hole) that can be interlocked together
are set on the fastening plate 122 and holding box 121, such that
the closing state of the fastening plate 122 can be positioned.
With the design of the fastener-type assembly element 12, the
holding box 121 can be firstly locked securely onto two parallel
locations of a preset object (e.g.: wall, window frame). Next the
fastening plate 122 swings in an opening state, such that the end
of the window curtain rod 10 is assembled into the holding space
123 of the holding box 121 through the assembly inlet 124 (shown by
arrow L1), and then the fastening plate 122 is covered so as to
finish the assembly and positioning of the window curtain rod 10.
Conversely, when it is intended to remove the window curtain rod
10, the window curtain rod 10 can be released by opening the
fastening plate 122, so the assembly element 12 hereto has
advantages including: ease of assembly and disassembly, time-saving
and high efficiency.
[0034] Based upon above-specified structural configuration, the
present invention is operated as follows:
[0035] Referring to FIG. 6, said cordless window curtain A is
operated in a way that the users can push or pull manually the
hollow bottom rod 22 of the curtain body 20 (shown by arrow L2), so
as to adjust the shielding area of the curtain body 20 and save the
pull rope. The core aspect of the present invention lies in said
reducing guide slot 60 and flanged guide shaft 70 with respective
functions.
* * * * *