JPH04123654U - Original static image reading device - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to miniaturize the reading unit in a static document image reading device in which a photoelectric conversion element is pressed against the surface of the document by a shaft that supports it. [Structure] A complete contact type photoelectric conversion element 1 and a carriage 2 that holds this photoelectric conversion element 1 and moves in the sub-scanning direction.
A shaft 11 that supports the carriage 2 slidably in the sub-scanning direction, and a shaft support device 10 that elastically presses the shaft 11 in the direction of the document surface. [Effect] Compared to conventional methods, the original can be read without going through the original glass and rod lens array between the original surface and the photoelectric conversion element, so the size can be reduced by the amount of the original glass and rod lens array. , it is also possible to reduce costs.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is a static document image reading device that reads a document placed on a flat table. The present invention relates to a document reading device.

0002

[Conventional technology]

Figure 4 shows a conventional document static image reading device disclosed in Japanese Patent Application Laid-Open No. 2-154247. Figure 5 is a front sectional view showing the structure of the carriage shown in Figure 4 (in this patent, the carriage is FIG. Image is of original glass, rod lens The image is focused on the photoelectric conversion element through the array.

0003

[Problem that the idea aims to solve]

As mentioned above, conventionally, a document surface glass and a rod lens array were used between the document and the imaging element. This was an obstacle to downsizing. Also, the amount of light attenuates in each part. Therefore, a decrease in the S/N ratio has been a problem.

0004

[Means to solve the problem]

The original static image reading device of this invention eliminates the original glass and rod lens array. Then, a fully contact type photoelectric conversion element is used as the photoelectric conversion element, and the document is directly scanned.

[0005]

[Effect]

The above-mentioned fully contact type photoelectric conversion element directly contacts the top of a flat document and performs photoelectric conversion. The element generates a two-dimensional image by being scanned in the sub-scanning direction. This makes it possible to read the original without going through the rod lens array and the original glass. I can do that.

[0006]

【Example】

FIG. 1 is a front sectional view of a still document image reading device according to an embodiment of the present invention. Ru. Figure 2 is an enlarged front sectional view of the shaft support structure shown in Figure 1, and Figure 3 is FIG. 2 is a perspective view of essential parts of the shaft support structure shown in FIG. 1; The complete contact type photoelectric conversion element 1 is fixed to a carriage 2, and the carriage 2 is attached to a bushing. 3, it is attached to the shaft 11 so as to be slidable in the left-right direction in FIG. The shaft 11 is guided by a shaft guide groove 12a provided in the shaft guide 12. The shaft is slidable in the vertical direction, and is further supported by a shaft pressing device 10. and is pressed elastically downward in FIG. The shaft support device 10 includes a shaft support 13, a spring post 14, and a spring post 14. It is composed of a pulling ring 15. Shaft support 13 is a spring post 14 is attached so that it can be slid up and down, and is moved downward in FIG. 2 by a spring 15. Being forced. The spring post 14 stands upright on the top surface 21a of the housing 21. Fixed. The spring 15 is moved vertically by the spring post 14. It is guided to expand and contract, and pushes the shaft holder 13 downward as shown in Figure 2. I'm wearing it. The complete contact type photoelectric conversion element 1 is placed on the original P to be read whose recording surface is above the figure 1. Place. The original P and the photoelectric conversion element 1 are in close contact with each other by the force of the spring 15. Closely attached. The carriage 2 equipped with the fully contact type photoelectric conversion element 1 is shown on the left and right sides of Fig. 1. By moving in the direction, it is read as two-dimensional image data using electrical signals. .

[0007]

[Effect of the idea]

As explained in detail above, the original still type image reading device of the present invention is a complete contact type optical image reading device. An electric conversion element, a carriage that holds this photoelectric conversion element and moves in the sub-scanning direction, and , a shaft that slidably supports this carriage in the sub-scanning direction, and this shaft. Since the device is equipped with a shaft support device that elastically presses the document in the direction of the document surface, without passing through the document surface glass and rod lens array between the document surface and the photoelectric conversion element. Because it is possible to read the original at Therefore, it is possible to reduce the size and reduce the cost.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of a still document image reading device according to an embodiment of the present invention.

FIG. 2 is an enlarged front cross-sectional view of the shaft support structure shown in FIG. 1;

FIG. 3 is a perspective view of essential parts of the shaft support structure shown in FIG. 1;

FIG. 4 is a front sectional view showing the structure of a conventional document static image reading device.

FIG. 5 is a side cross-sectional view showing the carriage of FIG. 4;

[Explanation of symbols]

P Original to be read 1 Fully contact type photoelectric conversion element 2 carriage 3 Bush 10 Shaft pressing device 20 Rotation mechanism for sub-scanning 30 Imaging mechanism 40 Transport mechanism 11 Shaft 12 Shaft guide 12a Shaft guide groove 13 Shaft support 14 Spring post 15 Spring 16 Positioning member 17 Support member 21 Housing 21a Upper surface of the housing 21b Housing Top plate of housing 22 Motor 23 Gear fixed to motor shaft 31 Original surface glass 32 Travel roller 33 Light source 34 Rod lens array 35 Career 36 Sliding bearing provided at one end of carrier 35 37 Photoelectric conversion element 38 Plates on both end faces of carrier 35

Claims (1)

[Scope of utility model registration request] Claims: 1. A housing having an opening on one side; a shaft disposed within the housing that is biased in the front direction of the opening and extending parallel to the opening surface; and a shaft through which the shaft is inserted.
A document stationary image reading device comprising a carriage movable along the shaft, and a fully contact type photoelectric conversion element housed in the carriage and having a photoelectric conversion surface disposed in the direction of the opening.