Patent Application
20070169900
1. Field of Invention
The present invention relates to a structure of rolling up curtain device. More particularly, the present invention relates to a curtain that can be rolled up to maximize its space utilization and reduce its fabrication cost on materials and production process.
2. Description of the Related Art
In order to accommodate crowed population, a lot of skyscrapers are built in the big city. However, those skyscrapers normally have large windows that are enormous in sizes require specially made curtains to cover them up so that people occupied the space can have some privacy in the rooms or can protect from the sunlight. Those curtains would require a special device that can roll up the curtains easily.
The conventional rolling up curtain devices comprises a rolling up device that is normally installed at a top portion of the curtain, wherein a user would pull a rope of the device to drive the rolling device so that the curtain could be either rolled up directly onto the rolling device or the curtain would be folded up and the rope would be rolled up onto the rolling device. The conventional rolling device is covered up by a cover of the curtain. In other words, the conventional rolling up device is installed inside the top portion of the curtain. This kind of design requires space, materials cost and production cost. Furthermore, since this design requires to incorporate with the curtain, when the length of the curtain is increased, the rolling up device will be increased in length, or its width to accommodate the various sizes of curtain. Therefore, the occupied space, the material costs and the manufacturing cost of the prior art rolling up device would be increased as well. It is, therefore, an object of present invention to provide an improved rolling up curtain device that can overcome those disadvantages.
It is an object of the present invention to provide an improved rolling up curtain device can occupy less space. The improved rolling up device of the present invention is located at a right hand side of a curtain so that it can reduce its occupied space.
It is another object of the present invention to provide an improved rolling up curtain device which is convenient and easy to use is compact in size.
It is another object of the present invention to provide an improved structure of the rolling up curtain device that requires less fabrication cost.
The present invention provides an improved rolling up curtain device comprising a fixed device that can support and locate the improved rolling up curtain device. The improved rolling up curtain device further comprises a driving device having a driving shaft wherein the driving shaft is assembled to the fixed device, and its position is approximately perpendicular to a surface area of a curtain. A resistant device is slipped onto the driving shaft and a protruding portion of the fixed device in order to restrict rotational movement of the driving shaft. A rolling device comprises at least one trench surrounded a circumference of the rolling device, wherein the driving shaft drives the rolling device to rotate around a central point of the driving shaft, and a guiding rope is rolled up around the trench of the rolling device.
The accompanying drawings are included to provide a further understanding of the present invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the invention. In the drawings,
The main purpose of the fixed device 2 is to support and fix those components of the improved rolling up curtain device 1 in place. The fixed device 2 comprises a fixed portion 21 and a protruding portion 22 used to locate the resistant device 5. On the other hand, the driving device 3 comprises a driving shaft 31, a driving gear 32 and a driving chain 33, wherein the driving gear 32 consists of a plurality of gear slots 321, and the driving chain 33 comprises a plurality of beads 331. The driving chain 33 is hanged onto the driving gear 32, and the driving shaft 31 is located within the fixed device 2 and the protruding portion 22. A driving section 311 is formed on one end of the driving shaft 31, wherein the driving section 311 of the driving shaft 31 is utilized to drive the resistant device 5 and the rolling device 6. The driving shaft 31 is positioned at a central part of the driving gear 32 in such that a central point of the driving shaft 31 is coincided with a central, point of the driving gear 32. Another end of the driving, shaft 31 is perpendicularly to a back surface of the driving gear 32 and does not protrude through the back surface of the driving gear 32. The position of the driving shalt 31 and a curtain 8 (refer to
The resistant device 5 comprises a sleeve 51 and an anti-elastic unit 52, wherein the sleeve 51 comprises a cavity 51, and a stop unit 521 is formed respectively on both ends of the anti-elastic unit 52. The anti-elastic unit 52 is slipped onto the protruding portion 22 of the fixed device 2. The sleeve 51 is put around the anti-elastic unit 52, and the two stop units 521 are located within the cavity 51 of the sleeve 51. The sleeve 51 is then assembled onto the driving section 311 of the driving shaft 31.
The rolling device 6 comprises at least one trench 61 surrounded the rolling device 6 and a plurality of rolling discs, wherein the driving shaft 31 drives the rolling device along the central point of the driving shaft 31. A guiding rope 7 is rolled up around the trench 61 of the rolling device 6, and a small slot 63 is formed on a top portion of every rolling disc 62. One end of the guiding rope 7 is tightly wedged between a space of the small slot 63. The rolling device 6 further comprises a trench opening 64, wherein the trench opening 64 is located inside the rolling device 6 and comprises a hole 641 formed on a top part of the trench opening 64. A stop block 642 is formed at a circumference of the trench opening 64, and its width size is smaller than a width between a gap of two stop units 521 of the anti-elastic unit 52. The sleeve 51 is slipped into the trench opening 64, wherein the stop block 642 is positioned in between the gap of the two stop units 521 of the anti-elastic unit 52. The hole 641 is slipped through the driving section 311 of the driving shaft 31, wherein a shape of a cross-sectional area of the hole 641 is conformed with a shape of a cross-sectional area of the driving section 311. However, a rotating angle or a rolling angle of the driving section 311 inside the hole 641 is less than 180 degrees.
It is clear from the above-mentioned invention, the present invention provides an improved rolling up curtain device that is located at a right hand side of the curtain as shown to reduce its occupied space. The rolling up-curtain device of the present invention is small in size and compact to install. Furthermore, the rolling up curtain device is convenient and easy to use. The improved structure of the rolling up curtain device requires less fabrication cost.
Other embodiments of the invention will appear to those skill in the art from consideration of the specification and practice of the invention disclosed herein It is intended that the specification and examples to be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
