TWM447642U - Image scanning device - Google Patents

Description

Image scanning device

The present invention relates to a scanning device, and more particularly to an image scanning device using a contact image sensor (CIS) module.

Referring to FIG. 1 and FIG. 2, a platform type scanning device 1 has a base 10, a bearing platform 11 covering the base 10, and a contact image sensor (Contact type) disposed on the base 10. Image Sensor, hereinafter referred to as CIS module 12. The carrying platform 11 has a surrounding wall 111, a frame 112 extending horizontally inwardly from the upper edge of the surrounding wall 111, and a transparent plate 113 fixed in an accommodating space surrounded by the surrounding wall 111 and the frame 112. The CIS module 12 has a substantially rectangular outer casing 121, and a sensor assembly 123 including a plurality of side-by-side sensors 122 disposed in the outer casing 121, and the short side wall 124 of the outer casing 121 and the surrounding wall of the carrying platform 11. The gap D1 between 111 is usually at least 3 to 5 mm. The length of the outer casing 121 is about 236-240 mm, and the total length of the sensor assembly 123 is about 216-218 mm, so the outer surface of the sensor assembly 123 from the sensor 122 to the outer surface of the short side wall 124 of the outer casing 121 The distance D2 is about 9-10 mm, and the thickness D3 around the wall 111 is generally 2.5-3 mm, and the side distance D of the sensor 122 from the outer surface surrounding the wall 111 to the outermost side of the sensor assembly 123 is D= D1+D2+D3 is approximately 20 mm.

Therefore, as shown in FIG. 2, when the edge of the content of the inner page of a book 4 to be scanned is less than the margin D of the outer surface of the carrying platform 11 surrounding the wall 111, the sensor component 123 Can't scan the inner page Content near the edge. In addition, since the transparent flat plate 113 has a step D4 between the frame 112 and the frame 112, and the short focal length of the CIS module 12, the portion of the inner page of the book 4 near the step D4 cannot be flat on the transparent plate 113. It cannot be scanned completely and focused, which is easy to cause scanning distortion.

Therefore, it is an object of the present invention to provide an image scanning apparatus capable of shortening scanning margins.

Therefore, the image scanning device of the present invention comprises a base, a carrying platform and a contact image sensor module.

The base has a bottom surface and a side wall surrounding the periphery of the bottom surface; the carrier platform is disposed on the base and includes a frame that fits the side wall of the base, and a transparent flat plate fixed on the frame, The frame has a first side plate, and one side of the transparent plate is spanned on the upper edge of the first side plate; the contact image sensor module is disposed on the bottom surface of the base, and the frame is The one side panel is substantially vertical and includes a housing, and a sensor assembly housed in the housing, the housing having a first short side wall adjacent to the first side panel, and the first side panel a first distance is less than or equal to 2 mm, the sensor assembly includes a plurality of sensors arranged side by side, and wherein a sensor closest to the first short side sidewall and the first short side sidewall A second distance between the outer surfaces is less than or equal to 2.5 millimeters.

Preferably, the frame is integrally formed of a plastic material, and a thickness of a portion of the first side plate near the upper edge is less than or equal to 2 mm, and the first side The upper edge of the plate defines an L-shaped load-bearing portion for the side span of the transparent plate, and the L-shaped load-bearing portion has a depth less than or equal to the thickness of the transparent plate.

Or, preferably, the frame further includes a second side plate parallel to and opposite to the first side plate, and two third side plates and a fourth side plate that are parallel and opposite to connect the first side plate and the second side plate, The second side plate, the third side plate and the fourth side plate are integrally formed of a plastic material to form a U-shaped frame, and the first side plate is formed by metal processing by sheet metal processing or aluminum extrusion processing, and The two ends are locked to an open end of the third side plate and the fourth side plate; the first side plate has a thickness of less than or equal to 1 mm, and the upper edge thereof forms an inverted L shape for the side frame of the transparent plate The carrying portion, the width of a horizontal plate of the inverted L-shaped carrying portion is less than or equal to the first distance.

In addition, preferably, the outer casing further has a second short side wall opposite to the first short side wall, and the first short side wall has a thickness smaller than a thickness of the second short side wall.

The utility model has the advantages of shortening the distance between the outer casing of the contact image sensor module and the first side plate of the frame (frame) of the carrying platform, and shortening the sensor component of the contact image sensor module a distance from the first short side wall of the outer casing adjacent to the first side panel, and thinning the thickness of the first side panel such that the outermost sensor of the sensor assembly is outside the first side panel of the frame (frame) The distance (margin) of the surface can be reduced to about 5 mm to shorten the scanning margin and expand the effective scanning range.

The foregoing and other technical contents, features and effects of the present invention will be described in the following detailed description of the two preferred embodiments with reference to the drawings. Clear presentation.

The novel image scanning device can be applied to a flatbed scanner (FB Scanner) or a multifunction printer (MFP) using a contact image sensor (CIS). The preferred embodiment of the present invention will be described below using a flatbed scanner (FB Scanner).

Referring to FIG. 3 to FIG. 5, a first preferred embodiment of the present image scanning device includes a base 21, a carrying platform 22 that is disposed on the base 21, and a contact image sense disposed on the base 21. Contact Type Image Sensor (CIS) module 23.

The base 21 has a bottom surface 211 and a side wall 212 surrounding the circumference of the bottom surface 211.

The carrier platform 22 includes a frame 24 that mates with the side walls 212 of the base 21, and a transparent plate 25 that is secured to the frame 24. The frame 24 has a first side plate 241, a second side plate 242 that is parallel to and opposite to the first side plate 241, and two third side plates 243 that are parallel and opposite to each other to connect the two ends of the first side plate 241 and the second side plate 242. Four side panels 244. The second side plate 242, the third side plate 243, and the fourth side plate 244 are integrally formed of a plastic material, and are collectively formed to form a U-shaped frame, and the first side plate 241 is an elongated plate body made of a metal material. It is formed by sheet metal working or aluminum extrusion processing, and is locked at its opposite ends to an open end 245, 246 of the third side plate 243 and the fourth side plate 244.

In this embodiment, the transparent flat plate 25 is a rectangular transparent glass, and three sides opposite to the second side plate 242, the third side plate 243, and the fourth side plate 244 of the frame 24 are respectively fixed to the second side plate 242 and the third side. Side panel 243 and The inner surface of the four side plates 244, and the one side 251 opposite to the first side plate 241 is spanned on the upper edge of the first side plate 241, that is, as shown in FIG. 5, the upper edge of the first side plate 241 is formed. The side 251 of the transparent plate 25 is spanned by an inverted L-shaped load-bearing portion 247. Moreover, since the side edges 251 of the transparent flat plate 25 are exposed, in order to make the side edges 251 look more flat and beautiful, a decorative sheet 252 is usually adhered to the side edges 251.

The CIS module 23 is disposed on the bottom surface 211 of the base 21 and is substantially perpendicular to the first side plate 241 and the second side plate 242 of the frame 24. As shown in FIG. 5 and FIG. 6, the CIS module 23 includes an elongated outer casing 231, and a sensor assembly housed in the outer casing 231 and including a plurality of sensors 235 arranged side by side in a row. 232. The outer casing 231 has a first short side wall 233 adjacent to the first side plate 241 of the frame 24, and a second short side wall 234 adjacent to the second side plate 242 of the frame 24, and the first short side wall 233 and the first side plate 241 A first distance d1 between them is only 1.95 mm, and the thickness of the first short side wall 233 is smaller than the thickness of the second short side wall 234, so that the sensor of the sensor assembly 232 closest to the first short side wall 233 A second distance d2 between the 235 and the outer surface of the first short side wall 233 is only 2.05 mm. Moreover, since the first side plate 241 is made of a metal material having a good hardness and being hard to be deformed, the thickness d3 is only required to be 1 mm, that is, it has a good supporting effect. Further, the width of the horizontal plate 248 of the inverted L-shaped carrying portion 247 of the first side plate 241 is less than or equal to the first distance d1.

Thereby, the margin of one of the outermost sensor 235 of the CIS module 23 to the outer surface of the first side plate 241 is d=d1 (1.95 mm)+d2 (2.05 mm)+d3 (1.0 mm)=5 mm. The conventional flatbed scanner reduces about 15 millimeters Meter. Therefore, as shown in FIG. 5, when a page to be scanned of the book 4 is flatly attached to the transparent flat plate 25, and the binding portion of the book 4 abuts against the side edge 251 of the transparent flat plate 25, due to the transparent flat plate The side 251 of the 25 has no step difference, so the page to be scanned can be completely flat on the transparent plate 25, and the position of the sensor assembly 232 is closer to the binding of the page to be scanned than the conventional flatbed scanner, thus As long as the distance of the edge of the content of the page to be scanned close to the binding to the outer surface of the first side plate 241 of the frame 24 of the carrying platform 22 is greater than 5 mm, the sensor component 232 can scan the page to be scanned. The content close to the binding is shortened, and the scanning margin of the image scanning device of the embodiment is shortened, and the effective scanning range is expanded.

Referring to FIG. 7 to FIG. 9 , a second preferred embodiment of the present image scanning device includes a base 31 , a carrying platform 32 disposed on the base 31 , and a contact image disposed on the base 31 . A sensor (hereinafter referred to as CIS) module 23 is provided.

The base 31 has a bottom surface 311 and a side wall 312 surrounding the circumference of the bottom surface 311.

The carrying platform 32 includes a frame 34 that is fitted to the side wall 312 of the base 31, and a transparent flat plate 35 fixed to the frame 34. The frame 34 is a rectangular frame integrally formed of a plastic material having parallel and opposite ones. The first side plate 341 and the second side plate 342 are parallel and opposite to each other to connect a third side plate 343 and a fourth side plate 344 of the first side plate 341 and the second side plate 342. The first side plate 341 is an elongated plate body, and the second side plate 342, the third side plate 343, and the fourth side plate 344 have an inverted L-shaped cross section and define a U-shaped frame.

In this embodiment, the transparent flat plate 35 is a rectangular transparent glass, and the three side edges opposite to the second side plate 342, the third side plate 343, and the fourth side plate 344 of the frame 34 are respectively fixed to the second side plate 342 and the third side. The inner side surface of the side plate 343 and the fourth side plate 344, and the side 351 opposite to the first side plate 341 is spanned on the upper edge of the first side plate 341, that is, as shown in FIG. 9, the first side plate 341 The upper edge is formed with an L-shaped carrying portion 346 for the side 351 of the transparent flat plate 35 to span, and the depth of the L-shaped carrying portion 346 is slightly smaller than or equal to the thickness of the transparent flat plate 35, so the upper edge of the first side plate 341 is transparent. There is almost no step difference between the upper surfaces of the flat plates 35.

The CIS module 23 of the present embodiment is the same as that of the first embodiment, as shown in FIG. 6, and details are not described herein again. However, in the present embodiment, a first distance d1' between the first short side wall 233 of the outer casing 231 of the CIS module 23 and the first side plate 341 of the frame 34 is only 0.95 mm, and the sensor assembly 232 is the most A second distance d2' between the sensor 235 near the first short side wall 233 and the outer surface of the first short side wall 233 is still maintained at 2.05 mm, but the first side plate 341 is made of plastic material. The thickness is reduced to a minimum and still has sufficient supporting force to be deformed, and the thickness d3' near the upper edge portion 345 is about 2 mm, and the thickness near the lower end portion is more than 2 mm. Further, the width of the horizontal plate 340 of the L-shaped carrying portion 346 of the first side plate 341 is less than or equal to the first distance d1'.

Thereby, the margin of one of the outermost sensor 235 of the sensor component 232 of the CIS module 23 to the outer surface of the first side plate 341 is d=d1' (0.95 mm) + d2' (2.05 mm) + d3' (2.0 mm) = 5 mm, which is about 15 mm smaller than conventional flatbed scanners. Therefore, as shown in Figure 9, when the book 4 is to be scanned The drawn page is flat on the transparent flat plate 35, and when the binding portion of the book 4 abuts against the side edge 351 of the transparent flat plate 35, since there is almost no difference between the side edge 351 of the transparent flat plate 35 and the first side plate 341, Therefore, the page to be scanned can be completely flat on the transparent plate 35, and the position of the sensor component 232 is closer to the binding of the page to be scanned than the conventional flatbed scanner, so as long as the page to be scanned is close to The distance from the edge of the content of the binding to the outer surface of the first side panel 341 of the frame 34 of the carrying platform 32 is greater than 5 mm, and the sensor assembly 232 can scan the content of the page to be scanned close to the binding, and the same The scanning margin of the image scanning device of the embodiment can be shortened and the effective scanning range can be expanded.

In summary, the present embodiment shortens the distance between the outer casing of the contact image sensor module and the first side plate of the frame (frame) of the carrying platform, and shortens the sense of the contact image sensor module. a distance between the detector assembly and the first short side wall of the outer casing adjacent to the first side panel, and thinning the thickness of the first side panel such that the outermost sensor of the sensor assembly is first to the frame (frame) The distance (margin) of the outer surface of the side panels can be reduced to about 5 mm, which reduces the scanning margin and expands the effective scanning range.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent change and modification made by the novel patent application scope and the novel description content, All remain within the scope of this new patent.

4‧‧‧Books

21, 31‧‧‧ base

22, 32‧‧‧ Carrying platform

23, 33‧‧‧Contact Image Sensor (CIS) Module

24, 34‧‧‧ framework

25, 35‧‧‧ transparent plate

211, 311‧‧‧ bottom

212, 312‧‧‧ side wall

231‧‧‧ Shell

232‧‧‧Sensor assembly

233‧‧‧First short side wall

234‧‧‧Second short side wall

235‧‧‧ sensor

241, 341‧‧‧ first side panel

242, 342‧‧‧ second side panel

243, 343‧‧‧ third side panel

244, 344‧‧‧ fourth side panel

245, 246‧‧‧ open end

247‧‧‧ inverted L-shaped load bearing

248‧‧‧ horizontal board

251‧‧‧ side

252, 352‧‧‧

340‧‧‧ horizontal board

345‧‧‧Close to the upper edge

346‧‧‧L-shaped load-bearing part

1 is a schematic external view of a conventional flatbed scanning device; FIG. 2 is a partial cross-sectional view of the flatbed scanning device of FIG. 1; 3 is a perspective view of a first preferred embodiment of the image scanning device of the present invention; FIG. 4 is an exploded perspective view of the image scanning device of FIG. 3; and FIG. 5 is a partial cross-sectional view of the image scanning device of FIG. FIG. 7 is a perspective view of a second preferred embodiment of the image scanning device of the present invention; FIG. 8 is an exploded perspective view of the image scanning device of FIG. 7; Figure 9 is a partial cross-sectional view of the image scanning device of Figure 7.

4‧‧‧Books

23‧‧‧Contact Image Sensor (CIS) Module

25‧‧‧ Transparent plate

231‧‧‧ Shell

232‧‧‧Sensor assembly

233‧‧‧First short side wall

235‧‧‧ sensor

241‧‧‧First side panel

247‧‧‧ inverted L-shaped load bearing

248‧‧‧ horizontal board

251‧‧‧ side

252‧‧‧Modified tablets

Claims (4)

An image scanning device includes: a base having a bottom surface and a side wall surrounding the periphery of the bottom surface; a carrying platform disposed on the base and including a frame mating with the side wall of the base, and a fixing a transparent flat plate on the frame, the frame has a first side plate, and one side of the transparent plate is spanned on the upper edge of the first side plate; and a contact image sensor module is disposed on the base a bottom surface thereof and substantially perpendicular to the first side panel of the frame, and including a housing, and a sensor assembly housed in the housing, the housing having a first short side adjacent to the first side panel a first distance between the sidewall and the first side panel is less than or equal to 2 mm, the sensor assembly includes a plurality of sensors arranged side by side, and wherein the one closest to the first short side sidewall A second distance between the sensor and the outer surface of the first short side sidewall is less than or equal to 2.5 millimeters. The image scanning device according to claim 1, wherein the frame is integrally formed of a plastic material, and a portion of the first side plate near the upper edge has a thickness of less than or equal to 2 mm, and an upper edge of the first side plate An L-shaped load-bearing portion for the side span of the transparent plate is formed, and the depth of the L-shaped load-bearing portion is slightly less than or equal to the thickness of the transparent flat plate. The image scanning device according to claim 1, wherein the frame further comprises a second side plate parallel to and opposite to the first side plate, and two parallel and opposite sides for connecting the first side plate and the second side plate. a third side panel and a fourth side panel, wherein the second side panel, the third side panel, and the fourth side panel are Formed integrally with a plastic material to form a U-shaped frame, and the first side plate is formed by sheet metal processing or aluminum extrusion processing, and the two ends are locked to the third side plate and the fourth side. An open end of the side panel; the first side panel has a thickness of less than or equal to 1 mm, and an upper edge thereof forms an inverted L-shaped carrying portion of the side span of the transparent flat plate, and a level of the inverted L-shaped carrying portion The width of the plate is less than or equal to the first distance. The image scanning device of claim 1, wherein the outer casing further has a second short side wall opposite to the first short side wall, and the first short side wall has a thickness smaller than the second short side The thickness of the side wall.