DE8315103U1 - SCANNER FOR THE AUTOMATIC READING OF PREFERRED LUMINOUS IMAGES - Google Patents

Description

20. IK

AGFA-GEVAERT Aktiengesellschaft D-5090 Leverkusen 1 Patent department

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Scanning device for automatic reading of preferably luminous illustrations

The invention relates to a scanning device which is provided with a handle and has an electro-optical receiver for automatic reading of images, preferably luminous ones that appear on screens OCR font.

A scanning device of this type is known from GB-PS 14 04 599, for example. When using this known Device, however, a user cannot control whether the scanning device is exactly on the desired screen position is put on.

The invention has for its object to design a scanning device of the type mentioned so that the area to be scanned is selected first and only then can the electro-optical scanning be effected.

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According to the invention, this object is achieved by the features of the main claim. Further advantageous features of the invention can be found in the subclaims.
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The invention makes it possible to first scan the one to be scanned with a magnifying glass to be placed on a screen Specify the area precisely and then remove the magnifying glass and put the opto-electronic converter in front of the pan selected area

The invention is explained in more detail with reference to drawings. Show it

Fig. 1 is a side view of a cut open invent Appropriate scanning device,

Fig. 2 is a rear view of the partially broken away

and broken scanning device according to FIG 1.

For automatic reading of what appears on a screen So-called. OCR writing or other luminous images found use of scanning devices, the a pen-like or pistol-like grip part 1 and at its scanning end an imaging lens 11 and behind it comprise an electro-optic converter such as a CCD element. The lens 11 is on the site of the Screen that is to be read automatically. The position to be read could only be accessed in

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about to be put on without the exact assignment for example the center of the CCD element 10 to the of the image section to be read could be checked.

In order to be able to select precisely the point on the screen to be read when the scanning device 1 is placed on, the latter is designed like a pistol, with its protruding face la as a support surface for placing is formed on a screen. The actual scanning housing part 2 is about an axis 13

with respect to the pistol grip 1 and the support surface la and is pivoted by a spring 5 in the position shown in Figure 1 drawn. In the rest position, the scanning housing part 2 has a top over the support surface la protruding or adjoining this mount part 2a, in which a rod lens 3 is held is that its flat surface approximately in the extension of the support surface la along the upper one Long edge lies. The curved part of the rod lens 3 is visible above the scanning housing part 2. In the The rest position of the scanning device 1, 2 can therefore be the Place the support surface la on a screen and the point to be read through the rod lens 3 aim carefully.

Inside the scanning housing part 2 is one of the The receiver housing 9, which is similarly shaped on the side, is rotatable about the axis 13 together with the scanning housing part 2 stored. However, it is narrower and also mounted so as to be displaceable on the axis 13. It points as well as that

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Scanning housing part 2 a lying below the rod lens 3, with respect to the support surface la inclined surface on. These two surfaces of the scanning housing part 2 and receiver housing 9 have openings 2c and 9b, respectively the imaging lens 11 behind the opening 9b and behind it in the receiver housing 9, the CCD element 11 is attached are. In the pistol grip 1, a handle 4 is slidably mounted for pivoting the joint Openings 2c, 9b in place of the rod lens 3 below Wagon swing of the latter. The handle 4 is under the action of a return spring 6. The handle 4 and the two housing parts 2 and 9 have one inside the other in the operating direction 19 of the handle in the idle state 4 sloping sloping surfaces 4a, 2b, 9a. If the handle 4 is moved in the direction of arrow 19, the Inclined surface 4a moved and pivoted on the inclined surface 2b the two housing parts 2, 9 clockwise by an amount which is dimensioned so that the imaging lens 11 and the CCD element 10 are aligned with the point of a screen aimed at by the rod lens 3 are. The CCD element 10 is connected in a known manner to a known evaluation device via a cable 8. When the handle 4 is released, both housing parts 2, 9 are returned to the position shown by the spring 5 Swiveled back rest position.

Unit can now read an OCR line automatically An electric motor 14 is mounted in the receiver housing 9, the switch 7 of which is in the actuation path of the handle 4 is, so switched on when fully actuated

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will. In addition, in the way of the handle 4 is a below the action of a return spring 20 standing driver 21, which is also in a slot under the Action of a return spring 22 engages stationary friction surface 16, which is parallel to the image 1 inse 2a br, w. to the Axis 13 runs. A friction wheel 15 is mounted on the motor shaft. When the handle 4 is operated So not only in place of the rod lens 3 is the scanning arrangement 11, 10 pivoted and switched on after their pivoting in, the motor 14, but it is also the friction surface 16 is pushed against the friction wheel 15, so that when the friction wheel 15 rotates, the receiver housing 9 together with the motor 14 runs parallel to the axis 13 on the friction surface 16 and thus the CCD element is one of the Length of the opening 2c can scan the corresponding line. When you let go of the handle 4, the friction surface 16 is also tick-shifted so that the friction wheel 15 is exposed. Motor 14 including receiver housing 9 are therefore under the action of the return spring shown in FIG 17 has also been withdrawn to its original position.

Naturally, there are also other configurations than the one shown possible according to the invention. The motor 14 could also be mounted in the housing part 2 and the housing part 9 drive. Depending on the design of the code to be read, the receiver housing part 9 could also Motor 14 is completely omitted and immediately behind the opening 2c a further rod imaging lens and behind it a CCD line can be arranged, so that when actuated

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the handle 4 simply a whole Bnpfängerzeile to the Place of the rod lens 3 occurs.

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Claims (8)

• »■ ··· · ■ • · ··« ■ · ti claims 1. Provided with a handle part, an electrooptical receiver having a scanning device for the automatic reading of images, preferably of luminous OCR writing appearing on screens, characterized in that in a on the handle part Cl) displaceably or pivotably mounted scanning housing part (2) a Reading lens (3) and in the displacement or swiveling direction next to it the electro-optical receiver (10) are mounted with an imaging lens (11) and by means of a handle (- <* aligned Scanning position are adjustable. 2. Scanning device according to claim 1, characterized in that that the reading lens (3) can be held in or in the scanning position by a spring (5) is pivotable and the scanning housing part (2) is movement path the handle (4) is arranged against the action of the spring (5). 3. Scanning device according to one of the preceding claims, characterized in that the reading lens (3) is designed as a rod lens and the ele ¹ trooptical receiver (10) with the imaging lens (11) in a together with the scanning housing part (2) displaceable or pivotable Recipient A-G 1878 • · · ■ ■ ■ • · Il > 1 4. ger housing (9) is arranged along a to Rod lens (3) parallel axis (13) in the scanner housing part (2) is slidably mounted. 4. Scanning device according to one of the preceding claims, characterized in that in the scanner housing part (2) or in the receiver housing (9) a Electric motor (14) is mounted and that between the electric motor (14) and receiver housing (9) or scanning housing part (2) the drive of the receiver housing (9) along the axis (13) serving gear parts (15, 16) are arranged. 5. Scanning device according to claim 4, characterized in that that a switch (7) for the electric motor (14) is arranged in the movement path of the handle (4) is. 6. Scanning device according to claim 1 or another of the preceding claims, characterized in that on the handle (4), the scanning housing seteil (2) and the receiver housing (9) retired one inside the other, approximately complementary inclined surfaces (4a, 2b, 9a) are provided and the Obliquely flär.he (4a) of the handle (4) against the Inclined surface (2b) of the scanning housing part (2) can be pushed or pushed when the handle (4) is operated is - A-G 1878 7. Scanning device according to claim 4 or another of the preceding claims, characterized in that the electric motor (14) in the receiver housing (9) is mounted that a friction wheel (IS) is connected to its motor shaft, and that with the A handle (4) which can be brought into engagement with the friction wheel (15) during its movement and is parallel to the axis (13) Friction surface (16) is coupled. 8. Scanning device according to claim 7, characterized in that the receiver housing (9) or the electric motor (14) engages a return spring (17). For this purpose 2 sheets of drawings
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