CN1267036A - Image scanner - Google Patents
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- CN1267036A CN1267036A CN 99102956 CN99102956A CN1267036A CN 1267036 A CN1267036 A CN 1267036A CN 99102956 CN99102956 CN 99102956 CN 99102956 A CN99102956 A CN 99102956A CN 1267036 A CN1267036 A CN 1267036A
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- image scanner
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Abstract
An image scanner is composed of shell, scan platform with smooth surface, guide element consisting of clamps at both sides of scan platform and moving in longitudinal direction of scan platform, scan module fixed to guide element, photoelectric converter module for converting the image to electric signals, and driver mechanism for driving scan module along the scan platform in longitudinal direction. Its advantages are constant focus depth, simple drive mechanism of scan module, and easy assembly.
Description
The present invention relates to a kind of image scanner, particularly relate to a kind of have keep the fixing image scanner of the depth of field holding device of the depth of field of scanning mould.
Using image scanner is that the technology of corresponding signal of video signal is known with the video conversion of file to be scanned, and one of factor that influences image quality is how when scanning, make scanning module and file to be scanned keep certain depth of field, and this problem is with the most obvious in the portable scanning module that continue to move in the image scan process, is a example in this type of image scanner as flat-bed color image scanners.
Referring to Fig. 1, be a kind of organigram of traditional platform formula image scanner, it has a loam cake 10 in order to flatten file to be scanned; One housing 20, it has clear glass 22 as carrying the file to be scanned or the platform of picture; One scan module (CCD or CIS) 40 for wherein Image Sensor in order to the image light signal is converted to electronic signal; What axle 31 was parallel to clear glass 22 vertically is fixedly arranged on housing 20; And one drive unit 32 in order to the guiding scanning module 40 move along rotating shaft 31, to scan file to be scanned.
Structure according to above-mentioned scanner, in the scanner installation process, can keep certain depth of field with file to be scanned in order in scanning process, to make scanning module 40, and must carefully adjust or proofread and correct clear glass 22 and rotating shaft 31 relative position each other, but because both processing and the factor of installing, cause the difficulty proofreading and correct and adjust easily, cause the depth of field between scanning module 40 and the file to be scanned to be difficult to keep certain, cause scanning quality not good, especially the depth of field of CIS module is very shallow, and the variation of the depth of field is bigger for the image quality influence; Simultaneously since known drive unit 32 use by roller set collocation belt or steel wire, also easily cause assembling and adjustment on difficulty.
Fundamental purpose of the present invention is to provide a kind of image scanner, and it improves the known scanning module and the depth of field between the file to be scanned and is difficult to keep certain problem.
Another object of the present invention is to provide a kind of image scanner, its improves because the reference field of file to be scanned and scanning module is different, cause the problem of the difficulty of adjustment and production.
Another purpose of the present invention is to provide a kind of image scanner, the complexity of the gear train of its reduction scanning module and the degree of difficulty of assembling.
The object of the present invention is achieved like this: a kind of image scanner, it comprises housing, has the scanning platform of a flat surface as loading end, its guide element is made of several anchor clamps and slides is provided in the both sides of described scanning platform, and moves along the longitudinal direction of described scanning platform; Scanning module is fixed in described guide element, and comprises the opto-electronic conversion module, and the video conversion of using described file to be scanned becomes corresponding electric signal, and driving mechanism is used for driving described scanning module and moves along the longitudinal direction of described scanning platform.
It comprises that also one is used for the loam cake of described file pressing to be scanned at described scanning platform.
Scanning platform has projecting edge at the two ends of scan-line direction.
The section of anchor clamps roughly is the Contraband font, and its opening portion just can be clamped the projecting edge of described scanning platform toward each other.
The anchor clamps inboard also is provided with one and is used for the contact element that contacts with the projecting edge of described scanning.
The surface of contact of contact element is low friction numerical table face.
The anchor clamps inboard still can be provided with one in order to cushion the damper that moves the torque that is produced because of described scanning module.
Damper is a spring.
The motor configurations of drive unit is on described scanning module; Train of reduction gears and this motor coupling in order to the power of exporting this motor; One tooth bar is fixedly arranged on the described housing, and meshes with described train of reduction gears.
The disclosed technology according to the present invention, loading end with file to be scanned is the moving reference face of scanning module, a kind of guide element that is arranged at loading end is provided, this guide element and be connected in scanning module, make scanning module in the shift motion that scans along loading end, can maintain a certain distance with loading end by keeping of guide element, and reach the purpose that keeps scan depth, and improve the problem that needs each relevant reference field of adjustment when scanner is assembled.And according to solution of the present invention, the drive unit (as motor or reduction gearing) that will be used for the transmission scanning module, be equipped on scanning module, being equipped with one is relative motionless reference field (as tooth bar) with image scanner, the reduction gearing of drive unit is engaged in tooth bar, and becomes a kind of drive unit of motion scan module.
Compared with prior art, the present invention has following advantage:
1, because the surface of scanning platform is fixed in scanning module by a guide element in the present invention, move and make scanning module in scanning process, can do opposing parallel with scanning platform, therefore can make the certain depth of field of maintenance between file to be scanned and the scanning module, and because drive method of the present invention is the scanning reference field with the scanning platform, not only can avoid known because of using axostylus axostyle and placing on the different parts, needing to cause the method for each relevant reference field of adjustment, also can improve the control and the crooked quality problem of image of the depth of field in scanning process.
2, because the present invention just utilizes a guide element to make scanning module be fixed on the surface of scanning platform, be maintained fixed the purpose that the depth of field reaches does not need adjustment and reach, structure to original scanner there is no great change, therefore can save the quantity and the volume of part, and then reduces manufacturing cost.
The present invention is described in further detail below in conjunction with accompanying drawing and specific embodiments.
Fig. 1 is the organigram of traditional platform-type scanner.
Fig. 2 is the structure side view of image scan first embodiment of the present invention.
Fig. 3 is the structure top view of image scan first embodiment of the present invention.
Fig. 4 is the structural perspective of image scan first embodiment of the present invention.
Fig. 5 is the schematic appearance of first kind of guide element among Fig. 2.
Fig. 6 is the schematic appearance of second kind of guide element among Fig. 2.
Fig. 7 is for being equiped with the schematic appearance of the guide element of damper among Fig. 2.
Fig. 8 is the structure side view of image scanner second embodiment of the present invention.
See also Fig. 2, for image scanner first of the present invention is implemented, along the sectional view of scan-line direction.This image scanner includes a housing 12, a loam cake 10, be configured in housing 12 upper surfaces and as the scanning platform 23 of file loading end to be scanned, the guide element 50 that is configured in scanning platform both sides projecting edge, 50a, be fixed in the scanning module 40 of guide element 50,50a and be used for driving the drive unit 60 that this scanning module 40 moves.
As shown in Figure 4, scanning platform 23 has a flat surface, in order to carry file to be scanned.This scanning platform 23 is preferably glass material, but also can be the medium of transparent light-permeables such as plastic cement.As shown in Figure 2, these scanning platform 23 both sides have jag 24,24a, are used for slide arrangement guide element 50,50a, and guide element 50,50a can be moved freely on scanning platform 23 along this jag 24,24a.Scanning module 40 then is fixed on guide element 50,50a below, and keeps a determining deviation with scanning platform 23, the fixedly depth of field when scanning to form.
As shown in Figure 5, the sectional view that shows the anchor clamps 51 of guide element 50. Guide element 50,50a comprise two anchor clamps that correspond to each other 51,51a at least, and the section of anchor clamps 51,51a roughly is the Contraband font, and its opening portion toward each other, just can clamp jag 24, the 24a of scanning platform 23.As shown in Figure 5, the inboard of these anchor clamps 51,51a forms several contact elements 52, the surface of contact that contact element 52 contacts with scanning platform 23 is the surface of low friction number, for example be covered with the low friction of one deck number material on certain surface, Teflon etc. for example, use allowing guide element 50,50a not only can clamp jag 24,24a, and can on scanning platform 23, slide easily.
40 of scanning module link the lower edge of consolidating at these two anchor clamps 51,51a, and are maintained fixed spacing with scanning platform 23.Cause the scanning module 40 can be through the support of anchor clamps 51,51a, the surperficial bearing of trend along scanning platform 23 moves along with the driving of drive unit 60 under the relation of certain relative position keeping with scanning platform 23.
In the embodiment shown in Fig. 2,3,4, the drive unit 60 of motion scan module 40 is directly to be arranged at scanning module 40, scanning module 40 can be moved along the longitudinal direction of scanning platform 23, and this drive unit 60 comprises the motor 61 that is configured on the scanning module 40, by a plurality of gear A that are engaged with each other 62, train of reduction gears that B63, C64 formed and be arranged on housing 12 bottoms and the tooth bar 65 meshing with reduction gearing C64.
Therefore when scanner one start, can order about motor 61 and rotate, and driven gear 62 rotates, gear 62 driven gear 63 again rotates with gear 64.Because gear 64 intermeshes with tooth bar 65, and tooth bar 65 to be fixed in housing 12 bottoms motionless, therefore when gear 64 rotations, can relatively drive scanning module 40 and move, in order to carry out scanning operation.
Because motor 61 of the present invention and train of reduction gears 62,63,64 all are set directly at scanning module 40, and tooth bar 65 is fixed on housing 12 bottoms of scanner, therefore when mounted, as long as the gear C 64 of scanning module 40 is meshed with tooth bar 65, can save the problem of adjustment.
Certainly,, be not limited to above-mentioned mode of drive units being installed in scanning module 40 in order to the mode that driven sweep module 40 moves, other utilize as the time advise belt, rope drive mechanism, or other similar means all can.
Wherein because scanning module 40 of the present invention is guided element 50,50a is fixed on the below of scanning platform 23, therefore scanning module 40 is a reference field with scanning platform 23, the reference field of file to be scanned also is a scanning platform 23, therefore by this guide element 50,50a, the moving direction that can make file to be scanned and scanning module 40 all is with scanning platform 23 reference fields, thus, when scanner is assembled, do not need again as known because of both reference fields of file to be scanned and scanning module 40 different, and need both reference fields of adjustment, can save the time that the user installs.
In addition because scanning module 40 is belows of being fixed in scanning platform 23, therefore scanning module 40 can be done opposing parallel with scanning platform 23 and moves in scanning process, and reach the purpose that makes file to be scanned and scanning module 40 keep certain depth of field, can improve the control and the crooked quality problem of image of the depth of field in scanning process.
See also Fig. 7, be respectively second embodiment of guide element 50a in the depth of field holding device.As shown in Figure 7, present embodiment is identical with the subelement of first embodiment will continue to use its sign, wherein the present embodiment and the first embodiment difference are, selection is arranged at the wherein anchor clamps 51a of a side of scanning platform 23, set up damper 53, this damper 53 has elasticity (for example: spring or other functionally similar element), and see through the lateral margin that one of them contact element 52 is resisted against scanning platform 23, in order to absorb the width error of scanning platform, and the torque that produced when moving of buffering because of scanning module 40, the seismism that can avoid scanning module 40 in the process that moves, can produce, in order to avoid scanning module 40 move left and right, and influence scanning quality, wherein the floor map of this guide element 50a is as shown in Figure 8.And the better position of damper 53 is among the anchor clamps 51a that is located in the scanning module 40 with respect to the opposite side of drive unit 60.
The enforcement state of the disclosed guide element of the present invention is not limited to disclosed pattern among the present invention, the direction of guide element installing also can be made a little changes again, and make scanning module can be fixed on the top of loading end, being used for driving the drive unit that scanning module moves in addition also can be replaced by other physical construction, generally speaking, make this scanning module be fixed on the surface of this scanning platform as long as can reach, and can guide this scanning module and in scanning process, can make reciprocating type mobile purpose, no matter be that the guide element or the drive unit of that a kind of pattern all can disclosed technology be realized according to the present invention along certain distance and this scanning platform.
Claims (9)
1, a kind of image scanner, it comprises housing, have the scanning platform of a flat surface as loading end, it is characterized in that: guide element is made of several anchor clamps and slides is provided in the both sides of described scanning platform, and moves along the longitudinal direction of described scanning platform; Scanning module is fixed in described guide element, and comprises the opto-electronic conversion module, and the video conversion of using described file to be scanned becomes corresponding electric signal, and driving mechanism is used for driving described scanning module and moves along the longitudinal direction of described scanning platform.
2, image scanner according to claim 1 is characterized in that: it comprises that also one is used for the loam cake of described file pressing to be scanned at described scanning platform.
3, image scanner according to claim 1 is characterized in that: scanning platform has projecting edge at the two ends of scan-line direction.
4, image scanner according to claim 3 is characterized in that: the section of anchor clamps roughly is the Contraband font, and its opening portion just can be clamped the projecting edge of described scanning platform toward each other.
5, image scanner according to claim 4 is characterized in that: the anchor clamps inboard also is provided with one and is used for the contact element that contacts with the projecting edge of described scanning.
6, image scanner according to claim 5 is characterized in that: the surface of contact of contact element is low friction numerical table face.
7, image scanner according to claim 4 is characterized in that: the anchor clamps inboard still can be provided with one in order to cushion the damper that moves the torque that is produced because of described scanning module.
8, image scanner according to claim 7 is characterized in that: damper is a spring.
9, image scanner according to claim 1 is characterized in that: the motor configurations of drive unit is on described scanning module; Train of reduction gears and this motor coupling in order to the power of exporting this motor; One tooth bar is fixedly arranged on the described housing, and meshes with described train of reduction gears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99102956 CN1130660C (en) | 1999-03-12 | 1999-03-12 | Image scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99102956 CN1130660C (en) | 1999-03-12 | 1999-03-12 | Image scanner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1267036A true CN1267036A (en) | 2000-09-20 |
| CN1130660C CN1130660C (en) | 2003-12-10 |
Family
ID=5271061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99102956 Expired - Fee Related CN1130660C (en) | 1999-03-12 | 1999-03-12 | Image scanner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1130660C (en) |
-
1999
- 1999-03-12 CN CN 99102956 patent/CN1130660C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1130660C (en) | 2003-12-10 |
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