SCANNING MODULE OF IMAGE SCANNER

Abstract

A scanning module of an image scanner for scanning a document is provided. The scanning module of the image scanner includes a base, a reflective mirror stand, a shaft, a reflective mirror member and a gear set. The reflective mirror stand is mounted on the base. The shaft is rotatably mounted on the reflective mirror stand. The reflective mirror member is fixed on the shaft and rotated with the shaft. The gear set is pivotally coupled to the shaft for rotating and driving the shaft to adjust the reflective angle of the reflective mirror member, which is fixed on the shaft.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic cross-sectional view of a conventional scanning module 100;

FIG. 2( a) is a schematic perspective view of another conventional scanning module 200;

FIG. 2( b) is a schematic side view of the scanning module 200 of FIG. 2(a);

FIG. 3( a) is a partial schematic perspective view of a scanning module 300 according to a preferred embodiment of the present invention;

FIG. 3( b) is a schematic perspective view of a gear set 34 used in the scanning module 300 of FIG. 3(a); and

FIG. 3( c) is a schematic perspective view of the gear set 34 used in the scanning module 300 of FIG. 3(a) taken from another viewpoint.

Claims

1. A scanning module of an image scanner for scanning a document, said scanning module of said image scanner comprising: a base;a reflective mirror stand mounted on said base;a shaft rotatably mounted on said reflective mirror stand;a reflective mirror member fixed on said shaft and rotated with said shaft; anda gear set pivotally coupled to said shaft for rotating and driving said shaft to adjust the reflective angle of said reflective mirror member, which is fixed on said shaft.

2. The scanning module of said image scanner according to claim 1 wherein said gear set comprises: a gear stand disposed on said base;a drive gear sheathed around a dive gear shaft and rotatably mounted on said gear stand, so that said drive gear is rotated with said dive gear shaft; anda driven gear rotatably mounted on one side of said reflective mirror stand and sheathed around said shaft to be rotated with said shaft, wherein said driven gear is engaged with said drive gear.

3. The scanning module of said image scanner according to claim 2 wherein said dive gear shaft has a screw hole exposed to the outside of said gear set, so that said drive gear is rotated by a rotating tool after said rotating tool is inserted into said screw hole.

4. The scanning module of said image scanner according to claim 2 wherein the number of teeth on said driven gear is more than the number of teeth on said drive gear, so that said driven gear is driven to rotate at a relatively smaller angle when said drive gear is rotated at a relatively larger angle.

5. The scanning module of said image scanner according to claim 2 wherein said driven gear is driven to rotate when said drive gear is rotated, and the rotational angle of said driven gear is determined by the rotational angle of said drive gear and a gear ratio of said drive gear to said driven gear.

6. The scanning module of said image scanner according to claim 2 wherein the rotational angle of said driven gear is the same as that of said reflective mirror member, which is coaxially rotated with said shaft.

7. The scanning module of said image scanner according to claim 1 wherein said gear set comprises: a gear stand disposed on said base;a first drive gear sheathed around a dive gear shaft and rotatably mounted on said gear stand, so that said first drive gear is rotated with said dive gear shaft;a second drive gear coaxially sheathed around said dive gear shaft with said first drive gear and rotatably mounted on said gear stand, so that said second drive gear is rotated with said dive gear shaft, wherein the radius of said first drive gear is greater than that of said second drive gear, and said first drive gear is directly rotated by a user to perform angular adjustment; anda driven gear rotatably mounted on one side of said reflective mirror stand and sheathed around said shaft to be rotated with said shaft, wherein said driven gear is engaged with said second drive gear.

8. The scanning module of said image scanner according to claim 7 wherein the number of teeth on said driven gear is more than the number of teeth on said second drive gear, so that said driven gear is driven to rotate at a relatively smaller angle when said first drive gear is rotated at a relatively larger angle.

9. The scanning module of said image scanner according to claim 7 wherein said driven gear is driven to rotate when said first drive gear is rotated to drive coaxial rotation of said second drive gear, and the rotational angle of said driven gear is determined by the rotational angle of said first drive gear and a gear ratio of said second drive gear to said driven gear.

10. The scanning module of said image scanner according to claim 7 wherein the rotational angle of said driven gear is the same as that of said reflective mirror member, which is coaxially rotated with said shaft.