The present invention relates to a window covering for convenient cutting and particularly to a window covering that can be cut according to actual requirements and has a removable coupling set and an edging block mounted respectively on two sides of an upper rail of the window covering to facilitate installation and cutting.
The conventional window coverings now on the market such as Venetian blinds, pleated shades and the like mainly have an upper rail and a lower rail spaced from each other up and down and retractable slats interposed between the upper rail and the lower rail, and a lift cord or electronic remote control located on the window covering to control retraction or extension of the slats to block light or meet decorative purpose.
Many window coverings are installed by users after purchase. Some of them are ready for installation by the users. However, the window covering provided by the vendors often are limited to a few commonly used specifications. Hence even if users have measured the width of a targeted window or door where the window covering is to be installed prior to purchasing, there still could be dimensional differences between the two, such as the widths of the upper rail, lower rail and slats are slightly greater than the targeted window or door. Thus the users have to cut the excessive widths of the upper rail, lower rail and slats to fit the targeted window or door. Refer to
Therefore, the primary objective of the present invention is to provide a window covering for convenient cutting with a removable coupling set and a lift cord threaded outside or inside the upper rail and movable so that the window covering can be cut and assembled to fit the width of a targeted window and door.
The window covering according to the invention includes an upper rail, a lower rail, a shade assembly and a lift cord means and a removable coupling set and an edging block respectively fastened to outer sides of the upper rail.
The upper rail is elongated and has a channel inside, and a first through hole and a second through hole formed on the top and bottom surfaces close to two ends thereof threaded through by the lift cord means.
The lower rail is spaced from the upper rail at a lower side.
The shade assembly is located between the upper rail and the lower rail.
The lift cord means includes a lift cord assembly which has two lift cords and one end fastened to the lower rail and the other end threading through the shade assembly and the upper rail and passing through an engaging means located in the coupling set.
The coupling set is fastened to one opening at one side of the channel of the upper rail and has a latch portion at one side facing the upper rail and a holding portion abutting the latch portion. In an embodiment of the invention, the holding portion is located on an outer side relative to the latch portion, and has a housing compartment and an orifice on an upper side leading to the housing compartment. The engaging means is held in the housing compartment. The engaging means has a roller located at one side of the housing compartment and a gear rack inclinedly located at the other side of the housing compartment engaging with a movable gear. The roller and movable gear form a passage between them to allow the two lift cords to pass through via the orifice. Hence the two lift cords can pass through between the movable gear and the roller without being clamped and be drawn freely. The movable gear also can be moved upwards to engage with the gear rack to clamp the two lift cords against the roller to form an anchor condition.
The construction set forth above can achieve the following effects: 1. The coupling set is fastened to one side of the upper rail and latched in the channel of the upper rail through the latch portion in a detachable manner, and the lift cords also can be moved outside the upper rail. All this makes cutting of the window covering to fit a selected door or window easier; 2. Cutting of the upper and lower rails can be done by users without relying on outside window covering providers. It can better fit total environment. Cutting and installation of the window covering also are simpler and can be done by the users themselves.
The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
Please refer to
The upper rail 30 is elongated and has a channel therein which has upper openings 31 and 32 at two ends with the opening 31 coupled with the edging block 80, and a first through hole 33 and a second through hole 34 formed on the top and bottom surfaces close to two ends thereof and threaded through by the lift cord means 60.
The lower rail 40 is spaced from the upper rail 30 at a lower side and is elongated with a channel formed inside and lower openings 41 and 42 at two ends are wedged in by corresponding edging members 43.
The shade assembly 50 is located between the upper rail 30 and the lower rail 40, and has a shade 51 which may be a beehive slat, Venetian blind slat assembly or pleated window shade. In an embodiment shown in the drawings, the shade 51 is a beehive slat with an upper end and a lower end formed respectively a first coupling plate 52 and a second coupling plate 53 to attach to a lower end surface 35 of the upper rail 30 and an upper end surface 44 of the lower rail 40 to connect to the upper rail 30 and lower rail 40. The first and second coupling plates 52 and 53 and the shade assembly 50 of the beehive slat have respectively apertures 521 and 531 corresponding to the first and second through holes 33 and 34 of the upper rail 30.
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When users procure the window covering, they can select the upper rail and lower rail slightly longer than the width of the targeted window or door if no exact fitting one is available. Then the chosen window covering can be cut as discussion below by referring to the embodiment shown in
During installation of the beehive window covering 20 on the targeted window or door, pull the two lift cords 61 downwards in a loose condition without being clamped by the movable gear 733 and the roller 731 (referring to