CN2300117Y

CN2300117Y - Chopper for optical scanner

Info

Publication number: CN2300117Y
Application number: CN 97216605
Authority: CN
Inventors: 杨坤宝; 彭金章; 林明灿
Original assignee: Transpacific IP Ltd
Current assignee: Transpacific IP Ltd
Priority date: 1997-05-27
Filing date: 1997-05-27
Publication date: 1998-12-09
Anticipated expiration: 2007-05-27

Abstract

The utility model relates to a shading mechanism of an optical scanner, which mainly comprises a shading plate and a driving device, the shading plate can shade fully a transparent groove, and the driving device can drive the shading plate to make switching movement. When the light source of the optical scanner is kept in an open state, the shading mechanism of the utility model can prevent light from entering the inner part of an optical system; thus, the brightness contrast and correction of the scanner can be conducted; therefore, the problem that the existing scanner needs to close a light source when conducing brightness contrast and correction is avoided, and the problems of long latency time because the light source is repeatedly opened and closed and inconvenient use are also avoided. The utility model can be applied to the optical scanners in which an original copy is movable, and besides, the utility model can be used for the optical scanners in which an optical unit is arranged below original copy bearing glass or the original copy is fixed.

Description

The chopping mechanism of optical scanning device

The utility model relates to a kind of chopping mechanism of optical scanning device.

General optical scanning device at first all can be done self-verifying to each element of machine itself when start, one of them project is exactly the light and shade contrast rectifying inspection of scanning machine.At present, known optical scanning device is carrying out light and shade contrast timing, when all needing to wait the lamp source brightness complete stability of scanning machine earlier, just can carry out lightness correction, and will carry out the darkness timing, just can carry out after the lamp source must being extinguished fully again, by the time after this light and shade contrast is proofreaied and correct and is finished, turn on lights source once again again, and after treating lamp source brightness stability, can carry out formal scanning work.Because the lamp source of general optical scanning device is by just being opened to brightness stability, often need about 1～2 minute, and existing scanning machine carries out in start that light and shade contrast timing need be done the pass, the action in the source of turning on light, and causes the on time too tediously long, cause user's time waste, operation inconvenience.

The purpose of this utility model is: a kind of chopping mechanism of optical scanning device is provided, makes it under the state that the light source of scanning machine is held open, hide light source and make light can't enter optical system inside, can carry out the light and shade contrast simultaneously and proofread and correct.Avoid existing scanning machine must close light source fully carrying out light and shade contrast timing, light source is waited for long shortcoming preheating time closing repeatedly, causing when opening.And this chopping mechanism still can allow " light " freely to pass through under the scanning machine normal operating condition.

The purpose of this utility model is achieved in that a kind of chopping mechanism of optical scanning device, this optical scanning device mainly includes a light source cell, an original copy bearing glass, a reflector element, a lens unit, a charge coupled cell and a body in order to the bearing said elements, is provided with a light tank that can supply " light " to pass through between original copy bearing glass and reflector element.Said chopping mechanism includes a shadow shield and a drive unit, and the size of shadow shield can cover in light tank at least fully.Drive unit is connected a side of shadow shield, can drive shadow shield and switch mobile.This shadow shield does not hide light tank under the optical scanning device normal operating condition, can allow " light " freely to pass through.By this drive unit, shadow shield can be switched on the light tank, pass through to cover " light ".

Because adopt such scheme, shadow shield is not hiding light tank under the optical scanning device normal operating condition at ordinary times, can allow " light " freely to pass through.Carrying out the drive unit of light and shade contrast timing by chopping mechanism, shadow shield can be switched on the light tank, cover " light " and pass through, so just can under the state that light source cell is held open, carry out the correct operation of light and shade contrast.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the part-structure exploded perspective view of first embodiment of the utility model

Fig. 2 a is the vertical view (not containing light source cell and original copy bearing glass) of Fig. 1

Fig. 2 b is the A-A cut-open view (not containing light source cell and original copy bearing glass) of Fig. 1

Fig. 3 is the part-structure synoptic diagram of second embodiment of the utility model

Fig. 4 a is the synoptic diagram (opening) of revolving fragment when first position of rotation in the utility model

Fig. 4 b is the synoptic diagram (shielding status) of revolving fragment when second position of rotation in the utility model

Fig. 5 is the part-structure synoptic diagram of the 3rd embodiment of the utility model

Among the figure, 1. scanning machine 3. light source cells 5. original copy bearing glass 7. reflector elements

9. lens unit 11. charge coupled cells 13. bodies 15. light tanks

20,20a.

chopping mechanism

22,22a, 22b. shadow

shield

24,24a. drive unit

242,242a. solenoid valve 244,244a.

valve rod

26,26a. guide groove

32. 38. in strip arc plate 34. revolving fragments 36. motors

Figure 1 shows that first embodiment of the present utility model.In Fig. 1, optical scanning device 1 includes: one in order to light source cell 3 that " light " is provided, an original copy bearing glass 5 body 13 in order to contribution (not drawing among the figure), a reflector element 7, a lens unit 9, a charge coupled cell (CCD) 11 and a bearing said elements of the scanning of bearing desire.Wherein, elements such as reflector element 7, lens unit 9 and charge coupled cell (CCD) 11 generally are referred to as the optical system of optical scanning device 1.After " light " that light source cell 3 penetrates places the transmission (or reflection) of the contribution on the original copy bearing glass 5 in process, enter in the reflector element 7 through the light tank 15 between reflector element 7 and original copy bearing glass 5, interreflection by reflector element 7 makes the light path of " light " reach the required length of blur-free imaging, be imaged on the charge coupled cell 11 through the focusing of lens unit 9 again, be converted into digital signals so that further handle by charge coupled cell 11.

The light tank 15 other chopping mechanisms 20 that are provided with 7 of original copy bearing glass 5 and reflector elements, even under the state that the light source cell 3 of optical scanning device 1 is held open, also can utilize chopping mechanism 20 to hide light tank 15 stops " light " to enter optical system inside, so that carrying out the light and shade contrast of optical scanning device 1 proofreaies and correct, can avoid to close earlier and just can carry out the light and shade contrast behind the light source and proofread and correct as prior art, so that the user must light source repeatedly open and close during, wait for the light source preheating, cause time waste and use inconvenience.

In Fig. 1, chopping mechanism 20 includes a shadow shield 22 and a drive unit 24.The profile of shadow shield 22 is a flat elongated strip, and its size can cover in light tank 15 at least fully and pass through to avoid " light ".Drive unit 24 is a solenoid valve 242, and solenoid valve 242 is connected a side of shadow shield 22 by valve rod 244, can utilize electric current input solenoid valve 242 to do flexible action of switching with actuate valve stem 244.When optical scanning device 1 in normal operating state following time, shadow shield 22 does not cover light tank 15, so that " light " can freely be passed through.And when desiring to carry out light and shade contrast timing, may command solenoid valve 242 drives shadow shield 22 switchings and covers in light tank 15, stops passing through of " light ", and needn't close light source cell 3.

See also Fig. 2 a and Fig. 2 b, an other side place that is connected with valve rod 244 ends at shadow shield 22 can establish a guide groove 26, can provide channeling direction when shadow shield 22 is done to switch the action of moving.

Figure 3 shows that second embodiment of the present utility model.Drive unit 24a among its chopping mechanism 20a is a motor 36, and shadow shield 22a is mainly by comprising that a strip arc plate 32 and one circular revolving fragment 34 is constituted.One side of strip arc plate 32 is connected on the surface of revolving fragment 34 along circumference arc, and revolving fragment 34 is connected on one 38 of motor 36, but does the action that rotation is switched by the driving driven rotary sheet 34 and the strip arc plate 32 of motor 36.See also Fig. 4 a and 4b, when scanning machine during in normal running, revolving fragment 34 is positioned at first position of rotation (shown in Fig. 4 a), strip arc plate 32 stands upright on light tank 15 sides at this moment, make light tank 15 keep unimpeded state passing through in order to " light ", when control motor 36 driven in rotation sheets 34 rotate to second position of rotation (shown in Fig. 4 b), strip arc plate 32 just moves to the bottom of revolving fragment 34 and covers in light tank 15 fully, at this moment, the user then can carry out the light and shade contrast corrective action of optical scanning device, needn't extinguish light source in advance and also have no effect and proofread and correct result's precision.

The above is preferred embodiment of the present utility model only, is not limited to practical range of the present utility model.For example, optical scanning device 1 as shown in Figure 1 is the top that a light source cell 3 is arranged on original copy bearing glass 5, and be the portable optical scanning device 1 of an original copy face (manuscript to be scanned), yet apparent, chopping mechanism of the present utility model also may be implemented in other and is arranged on the optical scanning device of original copy bearing glass below (being body interior) or optical path device pedestal movable type (being that the original copy face is fixed) as light source cell.In addition, drive unit 24 also is not limited to only can connect a side that is arranged on shadow shield 22, also can be as shown in Figure 5, solenoid valve 242a is arranged on central authorities' one side of shadow shield 22b, be connected near the shadow shield 22b one side central authorities by one " V " shape valve rod 244a, and be provided with the guide groove 26a of guided slidable direction at the both sides of shadow shield 22b side, can move when opening and closing light tank 15 switching shadow shield 22, have balance and stability preferably.

Claims

1. the chopping mechanism of an optical scanning device, this optical scanning device (1) mainly includes a light source cell (3), an original copy bearing glass (5), a reflector element (7), a lens unit (9), a charge coupled cell (11) and a body in order to the bearing said elements (13), be provided with a light tank (15) that can supply " light " to pass through between original copy bearing glass (5) and reflector element (7), it is characterized in that: said chopping mechanism (20) includes a shadow shield (22) and a drive unit (24); The size of shadow shield (22) can cover in light tank (15) at least fully; Drive unit (24) is connected a side of shadow shield (22), can drive shadow shield (22) and switch mobile; Shadow shield (22) can be switched to light tank (15) by drive unit (24) upward passes through to cover " light ".

2. the chopping mechanism of optical scanning device according to claim 1, it is characterized in that: the relative opposite side place that is connected with drive unit (24) one sides at shadow shield (22) is provided with a guide groove (26), can drive shadow shield at drive unit and switch channeling direction is provided when mobile.

3. the chopping mechanism of optical scanning device according to claim 1, it is characterized in that: shadow shield (22) is flat fine strip shape.

4. the chopping mechanism of optical scanning device according to claim 1, it is characterized in that: drive unit (24) is a motor (36), shadow shield (22a) is by comprising that a strip arc plate (32) and a circular revolving fragment (34) are constituted, one side of strip arc plate (32) is connected on the circular revolving fragment (34), and revolving fragment (34) is connected on (38) of motor (36), rotate by motor (36) driven in rotation sheet (34), strip arc plate (32) switching can be moved to directly over the light tank (15), pass through to cover " light ".

5. the chopping mechanism of optical scanning device according to claim 1, it is characterized in that: drive unit (24) is a solenoid valve (242), the valve rod (244) of this solenoid valve (242) is connected a side of shadow shield (22), by the convergent-divergent of valve rod (244), can drive shadow shield (22) and suitably switch mobile along the direction of valve rod (244).

6. the chopping mechanism of optical scanning device according to claim 1, it is characterized in that: drive unit (24) is a solenoid valve (242a), it is arranged on central authorities' one side of shadow shield (22b), the valve rod (244a) of this solenoid valve (242a) is " V " shape, " V " shape valve rod (244a) is connected near shadow shield (22b) the side central authorities, and is provided with the guide groove (26a) of guided slidable direction at shadow shield (22b) both sides side.