Structure for protecting and guiding flat cable of traveling module
A structure for protecting and guiding a flat cable connected between a traveling module and a protective cover of a scanner is disclosed. The protective structure includes an anti-bending member mounted onto the traveling module for preventing the flat cable from being over-bent at its first end. A guide channel member is disposed on the protective cover under the flat cable and along the moving direction of the traveling module for guiding the flat cable during moving of the traveling module and preventing the flat cable from being swung left and right. The second end of the flat cable is extended into the protective cover via a protective sheath fitted on the cover for preventing the second end of the flat cable from excess bending angle and keep the flat cable smoothly moving without deflection.
1. Field of the Invention
The present invention relates to a protective structure for a flat cable, and more particularly to a structure for protecting and guiding a flat cable connected between a traveling module and a cover arranged in an image scanning device.
2. Description of the Prior Art
In various kinds of optical devices or electric appliances (such as image scanner, photo copier, test instrument, etc.), there is often equipped with traveling modules therein. For example, as shown in
The guide rods 4a, 4b serve as a guiding mechanism for guiding two traveling modules 5a, 5b. The first traveling module 5a carries a light tube as a light source for the image scanning device, while the second traveling module 5b carries a set of reflection mirrors for reflecting the light projected from the light source.
During scanning, a document to be scanned is placed on a document positioning plate of the scanner. It is known that the document positioning plate is a plane surface made of for example glass or other light transmittable, substantially rigid material, for supporting a document to be scanned. The light tube of the first traveling module 5a projects a light toward the document and then the light is reflected by the reflection mirror mounted in the second traveling module 5b.
The first and second traveling modules 5a, 5b are arranged to achieve a necessary scanning optical path during scanning. Typically, the first and second traveling modules 5a, 5b may be moved by a conventional driving motor via a transmission rope (not shown). In general, the ratio of the speed of the first traveling module 5a to the speed of the second traveling module 5b is 2:1.
In general, a flat cable 6 is connected between the traveling module 5a and the protective cover 3. The protective cover 3 contains therein a circuit board and relevant electronic components. One end of the flat cable 6 is connected to a connector socket 61 of the traveling module 5a, and the other end of the flat cable 6 is extended into the protective cover 3 via an opening 31 formed on the protective cover 3. So, the traveling module 5a can via the flat cable 6 obtains necessary controlling signals and electric power source from the electronic components arranged in the protective cover 3.
Generally, in order to minimize the length of the flat cable, the opening 31 on the protective cover 3 is located at a substantially middle section of the scanner.
Due to the material of the flat cable 6 itself, in the using regulation, the minimum curvature radius and the tolerable number of bending time of the flat cable 6 are limited. Under the connection structure of the conventional flat cable described above, since the traveling module 5a needs to frequently move left and right, the flat cable 6 will be repeatedly bent during scanning. In the case of excess bending angle, the flat cable 6 may be broken or damaged.
Moreover, the width of the existing flat cable is narrower and narrower (the number of pins is reduced) with longer length (such as used in scanning of A3 size document). Therefore, during the movement of the traveling modules, the flat cable is likely to curve and touch other components (such as the bottom surface of the document positioning plate of the scanner). In addition, the flat cable may swing left and right during movement of the traveling modules. These all lead to lowered reliability and shortened using life of the scanner.
SUMMARY OF THE INVENTIONIt is therefore a primary object of the present invention to provide a protective structure for preventing the flat cable of the traveling module from bending by an excess bending angle. Therefore, during the displacement of the traveling module, the end section of the flat cable is protected from being damaged due to excess bending angle.
It is a further object of the present invention to provide the above protective structure which is able to make the flat cable smoothly bent without collision and abrasion during movement of the traveling module.
It is still a further object of the present invention to provide the above protective structure which is able to guide the flat cable to smoothly move along with the traveling module without deflection.
To achieve the objects above, the protective structure in accordance with a preferred embodiment of the present invention includes an anti-bending member mounted onto the traveling module for preventing the flat cable from being over-bent at its first end. In addition, a guide channel member is disposed on the protective cover under the flat cable and along the moving direction of the traveling module for guiding the flat cable during moving of the traveling module and preventing the flat cable from being swung left and right. The second end of the flat cable is extended into the protective cover via a protective sheath fitted on the cover for preventing the second end of the flat cable from excess bending angle and keep the flat cable smoothly moving without deflection.
The present invention can be best understood through the following description and accompanying drawings wherein:
With reference to
An anti-bending member 7 is additionally mounted on a side wall of the traveling module 5a in accordance with the preferred embodiment of the present invention. The anti-bending member 7 serves to prevent the flat cable 6 from being bent by an excess bending angle at this end section.
Referring to
In addition, a guide channel member 8 is arranged on the protective cover 3 under the flat cable 3 and along the moving direction of the traveling module 5a in accordance with the preferred embodiment of the present invention. Therefore, when the traveling module 5a displaces, the guide channel member 8 serves to guide the flat cable 6 to bend smoothly without deflection.
Furthermore, a protective sheath 9 is additionally located at the opening 31 formed on the protective cover 3 in accordance with the preferred embodiment of the present invention.
When the flat cable 6 moves along with the traveling module 5a, the protective sheath 9 serves to keep the flat cable 6 smoothly moving without deflection and prevent the second section of the flat cable 6 from being bent by an excess bending angle.
As shown in
When the traveling module 5a further moves rightward to a right side position of the protective cover 3, as shown in
The above embodiment is only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiment can be made without departing from the spirit of the present invention.
Claims
1. A structure for protecting and guiding a flat cable, said structure comprising a housing, a cover and a traveling module movable in said housing with respect to said cover and a said flat cable having a first end connected to said traveling module and a second end extending and fixed to said cover, an anti-bending member mounted on said traveling module under said flat cable for preventing the said flat cable from being over-bent, said anti-bending member including a fixing board fixed to said traveling module and an arch shaped section extending from said fixing board whereby the flat cable is positioned with respect to the arch shaped section of said anti-bending member, and a protective sheath mounted on said cover with said second end of said flat cable extending into said cover via said protective sheath and a guide channel member formed on said cover under said flat cable and along a moving direction of said traveling module.
2. The structure according to claim 1, wherein said guide channel member comprises a guide channel base seat having two lateral edges and two vertical guide walls respectively formed on said lateral edges of said base seat and each of said guide walls formed with arch shaped inner wall surfaces.
3. A method comprising:
- limiting a bending angle of a cable of an optical device with an anti-bending member mounted on a traveling module in said optical device, wherein said cable contacts an upper surface of said anti-bending member; and
- inhibiting an excess side deflection of said cable with a guide channel member rigidly attached to said optical device.
4. The method of claim 3, wherein said anti-bending member comprises an arch shaped member located at a first end of said cable.
5. The method of claim 4, wherein said first end of said cable is positioned over a convex surface of said arch shaped member.
6. The method of claim 3 further comprising:
- limiting said bending angle of said cable with a protective sheath rigidly attached to said optical device.
7. The method of claim 6, wherein said cable extends through said protective sheath and attaches to said optical device.
8. An apparatus comprising:
- means for limiting a bending angle of a flat cable of a scanner, wherein said means for limiting a bending angle is mounted on a traveling module within a housing of said scanner, and wherein said means for limiting a bending angle is located under said flat cable; and
- means for inhibiting a side deflection of said flat cable of said scanner, wherein said means for inhibiting a side deflection is attached to said housing.
9. The apparatus of claim 8, wherein said means for limiting a bending angle of a first end of said flat cable comprises an arch shaped member mounted on said traveling module.
10. The apparatus of claim 8, wherein said means for inhibiting a side deflection of said flat cable comprises a guide channel member configured to receive an intermediate portion of said flat cable.
11. The apparatus of claim 8 further comprising a second means for limiting a bending angle of a second end of said flat cable with a protective sheath attached to said housing, wherein a first end of said flat cable is attached to said traveling module.
12. The apparatus of claim 8, wherein said means for inhibiting a side deflection of said flat cable comprises a guide channel member fixedly attached to said housing.
13. The apparatus of claim 12, wherein said travelling module is configured to travel above said guide channel member.
14. A structure for protecting and guiding a cable, said structure comprising:
- an anti-bending member mounted on a traveling module under a first end of said cable and configured to inhibit said cable from being over-bent during a movement of said traveling module in a housing; and
- a protective sheath attached to a fixed portion of said housing, wherein said protective sheath is configured to support a second end of said cable.
15. The structure for protecting and guiding said cable of claim 14, wherein said anti-bending member includes an arch shaped section, and wherein said first end of said cable wraps around a convex surface of said arch shaped section.
16. The structure for protecting and guiding said cable of claim 14 further comprising a guide channel member positioned along a moving direction of said traveling module and configured to inhibit a lateral deflection of said cable.
17. The structure for protecting and guiding said cable of claim 16, wherein said guide channel member inhibits said lateral deflection of said cable as said traveling module moves said cable back and forth along said moving direction.
18. The structure for protecting and guiding said cable of claim 16, wherein said guide channel member comprises a guide channel base seat having two lateral edges and two vertical guide walls respectively formed on said lateral edges of said base seat.
19. The structure for protecting and guiding said cable of claim 18, wherein each of said guide walls is formed with arch shaped inner wall surfaces.
20. The structure for protecting and guiding said cable of claim 16, wherein said guide channel member is configured to support an intermediate portion of said cable.
Type: Grant
Filed: Jun 9, 2005
Date of Patent: May 11, 2010
Inventors: Yin-Chun Huang (Hsinchu City 300), Chih-Wen Huang (Hsinchu City 300), Jen-Shou Tseng (Jhu-Nan Township, Miao-Li Country)
Primary Examiner: Rajnikant B Patel
Attorney: Stolowitz Ford Cowger LLP
Application Number: 11/150,601
International Classification: H01B 7/06 (20060101);