Patent Application
20070243000
The present invention will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for purpose of illustration and description only; it is not intended to be exhaustive or to be limited to the precise form disclosed.
Please refer to
Please refer to
During the process of assembling the collection roller 221, the first end 251 of the second actuating element 25 would be assembled with the first connecting element 24 and mounted within the socket 231, and the second end 252 of the second actuating element 25 is mounted within the gradient inward channel 2611 of the support shaft 26.
After the collection roller 221 is assembled, the first actuating element 23 might be able to move the second actuating element 25 along the anti-clockwise direction via the first connecting element 24 when the first actuating element 23 is forced by an anti-clockwise pressure; meanwhile, the second end 252 of the second actuating element 25 contacts with the gradient inward channel 2611 and slides into the inside of the support shaft 26 along the gradient inward channel 2611 by the elasticity and/or the torsion provided from the first connecting element 24. After the second end 252 of the second actuating element 25 is connecting with the stop surface 2611 of the gradient inward channel 2611, the support shaft 26 would be rotated anti-clockwise by the push from the second actuating element 25. As above, when the first actuating element 23 receives an anti-clockwise push, the collection roller 221 rotates anti-clockwise. On the other hand, when the first actuating element 23 receives a clockwise pressure and moves clockwise, the second actuating element 25 would rotate clockwise by the elasticity and/or torsion provided from the first connecting element 24. Nevertheless, during the process that the second actuating element 25 rotates clockwise, the second actuating element 25 would move out from the gradient inward channel 2611 and the support shaft 26 would not be moved due to no surface could receive the push from the second actuating element 25. Based on the first embodiment, the support shaft 26 cloud only rather rotate anti-clockwise than clockwise, i.e. the collection roller 221 rotates along a single direction rather than two directions. Since the collection roller 221 could rotate only along a single direction rather than two directions, it is easy to prevent the used ribbon collected in the collection portion 22 of the ribbon cassette structure 2 from being rolled back to the supplying portion 21 and be used again. In such a case, the printing quality of the picture could be controlled and maintained more completely.
Furthermore, it should be noted that if the gradient inward channel 2611 is arranged in a clockwise arrangement, and then the slope of the second end 252 of the second actuating element 25 should be changed to match the gradient inward channel 2611, so as to move along the gradient inward channel 2611 again when the first actuating element 23 is forced by a clockwise pressure. Nevertheless, in practice, the second end 252 of the second actuating element 25 could be in other shapes, such as the cube, the ladder-shape, the cone, the sphere and so on. Actually, the second end 252 of the second actuating element 25 could be any shape capable of driving the stop surface 26111 to drive the support shaft 26.
In addition, even though the first embodiment relates to the structure of the collection roller capable of rotating along a single direction rather than two directions, it should be noted that the similar structure could be applied to the supplying roller, such as the second embodiment shown in
As above, the above embodiments provide ribbon cassette structures formed by applying the incline principle and the specific geometric arrangements of the actuating elements and the elastic elements. During the operation of the ribbon cassette structure provided in this invention, since the actuating element could only cause the relevant roller to rotate along a specific single direction (only the supplying roller is rotated along a specific direction, or only the collection roller is rotated along a specific direction, or both the supplying and collection rollers are rotated along a same single direction), the used ribbon would not be rolled back and used again while the ribbon is forced by a undesired force. Accordingly, the provided ribbon cassette structure could effectively avoid the possibility of that the ribbon is repeatedly used in the conventional ribbon cassette structure and provide a better and more stable printing quality. In addition, the provided ribbon cassette structure could be easily assembled with the various conventional printers or photo printers by a simple cam combination, a gear combination or other simple mechanical combination, so that the cost for providing new torsion controller into the photo printer or printer can be avoided. Furthermore, since no torsion controller is necessary, the provided ribbon cassette structure also conforms to the trends of the simplicity, compactness, easy-carrying and miniaturization.
As above, it should be easily understood for one skilled in the art that the provided ribbon cassette structure of the present invention could not only avoid the conventional defect that the used ribbon being rolled back and re-used but also save the cost of adding a torsion controller and conform with the trends of the simplicity, compactness, easy-carrying, and miniaturization. Furthermore, the provided ribbon cassette structure could be applied to various printers or other printing devices, such as photo printers. Accordingly, the provided ribbon cassette structure of the present invention has the novelty, progressiveness and industrial application.
While the invention has been described in terms of what are presently considered to be the most practical and preferred embodiments, it is to be understood that the invention need not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures. Therefore, the above description and illustration should not be taken as limiting the scope of the present invention which is defined by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 095206201 | Apr 2006 | TW | national |
