Background technology
Along with the raising of computing power, and internet, Development of Multimedia Technology, image scanner (Scanner) has become the indispensable standard configuration of personal computer.For falt bed scanner commonly used, generally include an optical system and a gearing, drive optical system (Chassis) by gearing, make the optical sensor (Sensor) of optical system can progressively receive the image of paper surface, and video conversion is become electronic signal output.Wherein, optical sensor be generally charge-coupled device (CCD) (Charge-Coupled Device, CCD).
Please refer to Fig. 1, Fig. 2, wherein Fig. 1 is the stereographic map of locating shaft, gearing and the optical system of known falt bed scanner, and Fig. 2 is the side view of file placing plate, locating shaft and the optical system of known falt bed scanner.The top of optical system 10 has a light source 12, and receives slit 14, wherein the light penetration file placing plate that sent of light source 12 40 arrives the surface of files 50, and after the surface reflection via file 50, pass reception slit 14 and enter the inside of optical system 10, carry out image and receive processing, and drive optical system 10 lentamente by gearing 20 and advance, progressively to scan the surface of all files 50.
In sum, because optical system 10 must move along a specific linear direction exactly, the phenomenon of image distortion takes place when avoiding image scan, therefore, optical system 10 must be made linear translation along a locating shaft 30, wherein optical system 10 has a location axis hole 16, in order to installing and locating axle 30, makes optical system 10 make linear translation along the axis direction of locating shaft 30 exactly.As shown in Figure 2, because gearing 20 drives a side of optical system 10, and the same side of locating shaft 30 support of optical systems 10, therefore, need the opposite side of configuration one roller 18 in optical system 10, make optical system 10 when advancing, still be parallel to file placing plate 40, to avoid the phenomenon of optical system 10 run-off the straights.
General optical system comprises light source, catoptron, lens and optical sensor, and with a box case above-mentioned member is packed into wherein, and therefore, under identical design, the object distance of the interior lens of optical system is a fixed value.Please refer to Fig. 2, the falt bed scanner of different designs, its file placing plate 40 is not necessarily identical with the distance 42 of 30 of locating shafts, the distance 44 that also therefore corresponding change optical system 10 and file placing plate are 40, cause the surface of file 50 not dropped on the object distance of interior lens (not illustrating) of optical system 10, thereby must redesign another group optical system 10, change the object distance of interior lens with correspondence, make the surface of file 50 drop on the object distance of interior lens of newly-designed optical system 10.Therefore, the falt bed scanner of different designs, the structure of its pairing optical system 10 is also inequality, the cost that will significantly increase design for this reason and make.
Description of drawings
Fig. 1 is the stereographic map of locating shaft, gearing and the optical system of known platform formula scanner;
Fig. 2 is the side view of file placing plate, locating shaft and the optical system of known platform formula scanner;
Fig. 3 is the diagrammatic cross-section of height adjustable structure of the present utility model;
Fig. 4 is the diagrammatic cross-section of the height adjustable structure of first embodiment;
Fig. 5 is the diagrammatic cross-section of another height adjustable structure of first embodiment;
Fig. 6 is the diagrammatic cross-section of the height adjustable structure of second embodiment;
Fig. 7 is the diagrammatic cross-section of the height adjustable structure of the 3rd embodiment;
Fig. 8 is the diagrammatic cross-section of the height adjustable structure of the 3rd embodiment with screw retention;
Fig. 9 is the schematic top plan view that the height adjustable structure of the 3rd embodiment is fixed with snapping.
Description of reference numerals:
10: optical system 12: light source
13: box body 14: receive slit
15: axle carrier 16: positioning shaft hole
18: roller 20: gearing
30: locating shaft 40: the file placing plate
42,44: distance 50: file
60: the bottom surface
100: height adjustable structure
110,130,210,310: the first location divisions
120,140,220,320: the second location divisions
132,136: embedding hole 134: opening
142,144: grab 212: screw
222: through hole 230: bolt
322: the second tooth rank, 312: the first tooth rank
330: screw 340: buckle pieces
342: button block structure 344: snap-hook structure
Embodiment
In order to adjust the distance (as the mark 44 of Fig. 2) between optical system and file placing plate, please refer to Fig. 3, be the diagrammatic cross-section of height adjustable structure of the present utility model.The utility model is divided into box body 13 and axle carrier 15 with the structure of optical system 10, the main member of box body 13 bearing optical systems 10 wherein, for example light source, catoptron, lens and optical sensor etc., and axle carrier 15 has a location axis hole 16, positioning shaft hole 16 corresponding installing and locating axles 30, as shown in Figure 1 and Figure 2.Under the drive of gearing 20, axle carrier 15 is made linear translation along the axis direction of locating shaft 30.In addition, height adjustable structure 100 of the present utility model has one first location division 110 and one second location division 120, it is disposed at a side of box body 13 and axle carrier 15 respectively, and after the upper and lower translation relative position, couple, for example the mode phase contraposition with hook structure, bolt arrangement and tooth stage structure couples.The main instruction card hook structure of first embodiment of the present utility model will illustrate bolt arrangement and tooth stage structure respectively in second and third embodiment.
Please refer to Fig. 4, be the diagrammatic cross-section of the height adjustable structure of first embodiment of the present utility model.First location division, 130 respective shaft carriers 15 and be disposed at a side of box body 13, and first location division 130 has a plurality of embeddings hole 132, and the opening 134 in embedding hole 132 from top to bottom is distributed in the outside of this first location division 130 in regular turn.In addition, second location division, 140 corresponding box bodys 13 and be disposed at a side of a carrier 15, and second location division 140 has a grab 142, and grab 142 corresponding embeddings are buckled in one of these embedding holes 132.Wherein first location division 130 and second location division, the 140 corresponding modes that are disposed at box body 13 and axle carrier 15 comprise the integrally formed mode or the mode of screw retention.
Please also refer to Fig. 2, Fig. 4, under the fixing situation of the relative distance of 40 of locating shaft 30 and file placing plates, when grab 142 embeds when being buckled in lower embedding hole 132 relatively, will improve the height of box body 13 relatively, thereby shorten the distance 44 of 40 of optical system 10 and file placing plates.On the contrary, under identical situation,, will reduce the height of box body 13 relatively, thereby increase the distance 44 of 40 of optical system 10 and file placing plates when grab 142 embeds when snapping onto higher embedding hole 132 relatively.Wherein, when adjusting the height of box body 13, the height of roller 18 will be adjusted in the lump, or adjust the height of bottom surface 60, to avoid the phenomenon of box body 13 run-off the straights.
In sum, height adjustable structure 100 by first embodiment of the present utility model, when adjustment grab 142 embeds different embedding holes 132, can correspondingly adjust the relative distance up and down of 15 in box body 13 and axle carrier, and then adjust the distance 44 of 40 of box body 13 and file placing plates, the surface of file 50 is dropped on the object distance of interior lens (not illustrating) of optical system 10.Therefore, can solve known optical system 10 and not meet under the situation of interior lens object distance, must redesign the problem of the optical system 10 of another module in distance 44.In addition, when definite grab 142 is corresponding when embedding a certain specific embedding hole 132, and when assembling,, can improve the assembling speed of box body 13 and 15 in a carrier by the embedding snapping in 132 in above-mentioned grab 142 and embedding hole with artificial or alternate manner.
Please refer to Fig. 5, diagrammatic cross-section for another height adjustable structure of first embodiment of the present utility model, second location division 140 of height adjustable structure 100 also can have the grab 144 more than two or two, embeds in the corresponding embedding hole 136, to increase structural intensity respectively.In addition, in order to enlarge the scope of adjusting up and down of box body 13, can the corresponding number that increases embedding hole 136.In addition, first location division 130 is also configurable in a side of axle carrier 15, and second location division 140 then correspondence is disposed at a side of box body 13, and promptly first location division 130 and the 140 interchangeable configurations of second location division still do not influence the corrective action of height adjustable structure 100.
Please refer to Fig. 6, be the diagrammatic cross-section of the height adjustable structure of second embodiment of the present utility model.Height adjustable structure 200 mainly is made of first location division 210, second location division 220 and bolt 230.First location division, 210 respective shaft carriers 15 and be disposed at a side of box body 13, and second location division, 220 corresponding box bodys 13 and be disposed at a side of a carrier 15.Wherein first location division 130 has at least one screw 212, and the axis direction of screw 212 is approximately perpendicular to file placing plate 40 (as shown in Figure 2).And second location division 220 has at least one through hole 222, the axis direction of its corresponding screw 212, and run through second location division 220.In addition, provide at least one bolt 230, its correspondence runs through through hole 222 and locks in the screw 212.The corresponding mode that is disposed at box body 13 and axle carrier 15 of first location division 210 and second location division 220 wherein comprises in integrally formed mode or in the mode of screw retention.
Please also refer to Fig. 2, Fig. 6, under the fixing situation of the relative distance of 40 of locating shaft 30 and file placing plates, when bolt 230 increases when locking the degree of depth of screw 212, will improve the height of box body 13 relatively, thereby shorten the distance 44 of 40 of optical system 10 and file placing plates.On the contrary, under identical situation,, will reduce the height of box body 13 relatively, thereby increase the distance 44 of 40 of optical system 10 and file placing plates when bolt 230 reduces when locking the degree of depth of screw 212.Wherein, when adjusting the height of box body 13, the height of roller 18 will be adjusted in the lump, or adjust the height of bottom surface 60, to avoid the phenomenon of box body 13 run-off the straights.
In sum, by second embodiment of the present utility model, when locking the degree of depth of screw 212 by adjustment bolt 230, can correspondingly adjust the relative distance of 15 in box body 13 and axle carrier, and then adjust the distance 44 of 40 of the box body 13 of optical system 10 and file placing plates, make the surface of file 50 drop on the object distance of interior lens of optical system 10.So can solve the problem that known optical system 10 must redesign because of distance 44.In addition, because the flight pitch of bolt 330 is less, therefore adjusted the height of the box body 13 of optical system 10 by bolt 330, its degree of accuracy is better.
Please refer to Fig. 6, in order to enlarge the scope of adjusting up and down of box body 13, can the corresponding length that increases bolt 230.In addition, first location division 210 is also configurable in a side of axle carrier 15, and second location division 220 then correspondence is disposed at a side of box body 13, and promptly first location division 210 and the 220 interchangeable configurations of second location division still do not influence the corrective action of height adjustable structure 200.
Please see Figure 7, be the diagrammatic cross-section of the height adjustable structure of the 3rd embodiment of the present utility model.Height adjustable structure 300 mainly is made of first location division 310, second location division 320 and fixed component 330.First location division, 310 respective shaft carriers 15 and be disposed at a side of box body 13, and second location division, 320 corresponding box bodys 13 and be disposed at a side of a carrier 15.Wherein first location division 310 has a plurality of first tooth rank 312, these first tooth rank 312 from top to bottom protrude in the outside of first location division 310 in regular turn, and second location division 320 also has a plurality of second tooth rank 322, its corresponding first tooth rank 312 and protrude in the outside of second location division 320, wherein these second tooth rank, 322 correspondences are coupled to the first tooth rank 312 of part, make location division 310 and second location division 320 locating engagement mutually of winning.
In sum, in order to fix the relative position of 320 of first location division 310 and second location divisions, please refer to Fig. 8, be the height adjustable structure of the 3rd embodiment of the present utility model diagrammatic cross-section with screw retention, in first location division 310 and second location division 320 mutually after the locating engagement, on the vertical direction on the first tooth rank 312 and the second tooth rank 322, with a screw 330 as a fixed component, fix first location division 310 and second location division 320 simultaneously, in order to fix the relative position of 320 of first location division 310 and second location divisions.
Please refer to Fig. 9, for the height adjustable structure of the 3rd embodiment of the present utility model with the fixing schematic top plan view of snapping, similarly, in order to fix the relative position of 320 of first location division 310 and second location divisions, by paired buckle pieces 340 as a fixed component, it has a button block structure 342 and a snap-hook structure 344 respectively, wherein detain block structure 342 and protrude in the both sides of first location division 310 respectively, and on the vertical direction on the first tooth rank 312, extend, promptly on the normal direction of drawing, extend, and snap-hook structure 344 corresponding button block structures 342, be formed at the both sides of second location division 320 respectively, and on the vertical direction on the second tooth rank 322, extend, promptly on the normal direction of drawing, extend, therefore, with the first tooth rank 312 on the normal direction of drawing, after correspondence is adjusted to the chimeric position on the second tooth rank 322, more paired snap-hook structure 344 direct snappings are fixed in button block structure 342, thereby fix the relative position of first location division 310 and second location division 320.
Please also refer to Fig. 2, Fig. 7, under the fixing situation of the relative distance of 40 of locating shaft 30 and file placing plates, when these second tooth rank, 322 correspondences are coupled to the first lower tooth rank 312, to improve the height of box body 13 relatively, thereby shorten the distance 44 of 40 of optical system 10 and file placing plates.On the contrary, under identical situation, when these second tooth rank, 322 correspondences are coupled to the first higher tooth rank 312, will reduce the height of box body 13 relatively, thereby increase the distance 44 of 40 of optical system 10 and file placing plates.Wherein, when adjusting the height of box body 13, the height of roller 18 will be adjusted in the lump, or adjust the height of bottom surface 60, to avoid the phenomenon of box body 13 run-off the straights.
In sum, the 3rd embodiment of the present utility model can be by the relative position of adjusting 322 on these first tooth rank 312 and these second tooth rank, can correspondingly adjust the relative distance of 15 in box body 13 and axle carrier, and then adjust the distance 44 of 40 of optical system 10 and file placing plates, make the surface of file 50 drop on the object distance of interior lens of optical system 10.So can solve the problem that known optical system 10 must redesign because of distance 44.In addition, if the first tooth rank 312 and 322 on the second tooth rank are arranged closely more, promptly have less size, then the height control of the box body 13 of optical system 10 will have higher accuracy.Please refer to Fig. 7, in order to enlarge the scope of adjusting up and down of box body 13, number that can the corresponding first tooth rank 312.In addition, first location division 310 is also configurable in a side of axle carrier 15, second location division 320 then correspondence is disposed at a side of box body 13, and promptly first location division 310 and the 320 interchangeable configurations of second location division do not influence the corrective action of height adjustable structure 300 equally.
In sum, height adjustable structure of the present utility model has following advantage:
(1) height adjustable structure of the present utility model can be according to the design of different falt bed scanners, and adjusts the height of optical system relatively, makes same optical system can be applicable to the falt bed scanner of disparate modules design.
(2) height adjustable structure of first embodiment of the present utility model is by cooperating between grab and embedding hole, determining that grab embeds under the situation in a certain specific embedding hole.Assemble with artificial or alternate manner, can improve the speed of assembling.
(3) height adjustable structure of second embodiment of the present utility model because the flight pitch of bolt is less, is therefore adjusted the height of optical system by the height of bolt adjustment optical system by bolt, and its degree of accuracy is better.
(4) height adjustable structure of the 3rd embodiment of the present utility model is by tooth rank tabling location, if the arrangement on tooth rank is tight more, then the height control of optical system will have higher accuracy.
Though the utility model with three embodiment explanations as above; right its is not in order to limit the utility model; any person skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little change and retouching, therefore protection domain of the present utility model is as the criterion with claims.