JPH0733067U - Document reading output device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a small-sized and inexpensive document reading / outputting device in which an image sensor unit and a thermal head unit are integrated. A shift register in a document reading and outputting apparatus including an image sensor unit having a light receiving element for reading a document and a shift register, and a thermal head unit having a resistance heating element and a shift register for printing output on a thermosensitive recording paper. The multiplexer 7 is provided in the preceding stage, and the shift register of the image sensor section and the shift register of the thermal head section are shared by the shift register 3 by the switching operation of the multiplexer 7, and the image sensor section and the thermal head section are integrated. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading and outputting device such as a facsimile or an image scanner which reads a document and prints it out on a thermal recording paper.

[0002]

[Prior art]

 FIG. 8 is a diagram showing a structural example of a conventional read output device. Conventionally, in many facsimiles and image scanners, as shown in FIG. 8, the original 22 is brought into close contact with the image sensor unit 10 by the roller 21 and moved to read the original, and the thermal head unit 20 is read. The printout is made on the thermosensitive recording paper fed by the roller 24. As shown in FIG. 4, the image sensor unit 10 for reading an original includes a light receiving element 1, an analog switch 2, a shift register 3a and a light source (not shown). Further, the thermal head unit 20 for printing output is composed of a shift register 3b, a latch circuit 4, a plurality of block drivers 5 and a resistance heating element 6, as shown in FIG. The image sensor portion 10 and the thermal head portion 20 have independent structures.

FIG. 4 is a diagram showing a block configuration of a conventional image sensor unit 10. Generally, the image sensor section 10 is composed of a shift register 3a and an analog switch 2 for sequentially extracting the signals of the light receiving elements 1, ... The light receiving elements 1, ..., 1 are arranged in a straight line in one line on the document reading surface, and the analog switch 2 and the shift register 3a are configured in a one-to-one correspondence with the light receiving elements.

FIG. 5 is a timing chart of each signal of the conventional image sensor unit. A description will be given according to FIG. By inputting the STRTRG (star trigger) signal and the ISCLOCK (clock) signal, which are also signals of the reading cycle, to the shift register 3a, the start trigger is fed in sequence, and the analog switches 2 shown in FIG. You can open them in order. As a result, the image information of each light-receiving element is output as a VIDEO signal which is analog serial data, and the image processing unit (not shown) performs line correction, A / D conversion and the like. Each light receiving element 1 accumulates a charge by integrating the photocurrent after the analog switch 2 is opened and until the next time it is opened. By repeating this operation in sequence, it is possible to read signals on multiple lines.

FIG. 6 is a diagram showing a block configuration of a conventional thermal head unit. The thermal head unit 20 for printing and outputting temporarily holds the resistance heating elements 6, ..., 6 and the block drivers 5 ,. The latch circuit 4 and the shift register 3b for sequentially sending the data. The resistance heating elements 6, ..., 6 are arranged in a straight line on the printing surface of the recording paper, and the latch circuit 4 and the shift register 3b are configured in a one-to-one correspondence with the resistance heating elements. The block driver 5 drives the resistance heating elements 6 in units of 32 (or 64) units, and is formed as an IC.

FIG. 7 is a timing chart of each signal of the conventional thermal head unit. A description will be given according to FIG. By inputting the THCLOCK signal (clock signal) and the THDATA signal, which is data synchronized with this, to the shift register 3b, the data is fed from left to right. When the LA TCH signal (latch signal) is input after the data has been sent to the end of the shift register 3b, the data corresponding to each resistance heating element 6 is set in the block driver 5.

Next, by sequentially inputting STROBE _{1 to N} (strobe signals), each resistance heating element 6 is driven (heated) in block units to print on the thermosensitive recording paper. By sending back this operation, multiple lines can be printed.

[0008]

[Problems to be solved by the device]

 However, in the conventional device, since the image sensor unit 10 for reading the original and the thermal head unit 20 for outputting the print are separately separated, a wide space is required inside the device, and it is difficult to downsize the device, and the parts are There is a problem that the cost of the device becomes high and the assembly of the device becomes complicated.

The present invention has been made in view of the above points, and provides a small-sized and inexpensive original reading / outputting device in which the above problems are eliminated and an image sensor unit and a thermal head unit are integrated. With the goal.

[0010]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention comprises an image sensor unit having a light receiving element for reading a document and a shift register, and a thermal head unit having a resistance heating element and a shift register for printing output on a thermosensitive recording paper. In the document reading and outputting apparatus, as shown in FIG. 1, a multiplexer 7 is provided in front of the shift register, and the shift register of the image sensor section and the shift register of the thermal head section are shared by the switching operation of the multiplexer 7. The image sensor section and the thermal head section are integrated into one unit.

[0011]

[Action]

 In the present invention, the image sensor part and the thermal head part are integrated and each shift register is shared, so that this part can be downsized, the cost can be reduced, and the device assembly can be simplified. Further, in the copy operation of the conventional device, the image read by the image sensor unit is temporarily stored in the memory through the shift register and then printed by the thermal head unit. Since the data can be printed on the same line as the data on the same line, the copy operation can be speeded up.

[0012]

【Example】

 An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a document reading and outputting apparatus of the present invention. As shown in the figure, the document reading and outputting apparatus of the present invention includes a light receiving element 1, ..., 1, an analog switch 2, a shift register 3, a latch circuit 4, a block driver 5 ,. , ..., 6 and a multiplexer 7.

In the document reading and outputting apparatus of the present invention, the shift register of the image sensor unit 10 (see FIG. 4) and the shift register of the thermal head unit 20 (see FIG. 6) are shared, and the image sensor unit 10 and The thermal head portion 20 is integrated. A multiplexer 7 is provided in the preceding stage of the shift register 3 to switch the input data of the shift register 3 and the clock signal. In the figure, V _DD represents a power supply voltage applied to the light receiving element, and V _COM represents a power supply voltage applied to the resistance heating element.

FIG. 2 is a timing chart of each signal of this device. In this device, the image sensor unit 10 and the thermal head unit 20 are integrally combined, a multiplexer 7 is provided in the preceding stage of the shift register 3, and the SELECT signal (selection signal) of the multiplexer 7 is set to High to be set to the image sensor side. The STRTRG signal (start trigger signal) and the ISCLOCK signal (clock signal) are input to the shift register 3 to enable the operation of the image sensor unit 10 as described above.

Next, the SELECT signal (selection signal) of the multiplexer 7 is set to Low and set to the thermal head side, so that the THDATA signal and the THCLOCK signal (clock signal) are input to the shift register 3 as described above. The thermal head unit 20 can be operated. In this way, the signals input to the shift register 3 are switched by the multiplexer 7 so that the shift register can be shared.

FIG. 3 is a view showing the outer shape of the image sensor unit and the thermal head unit of the present invention. FIG. 3a is a lateral view when combined in a horizontal type, and FIG. 3b is an external shape when combined in a vertical type. It is a figure. The register 3 is housed in either the image sensor unit 10 or the thermal head unit 20. The original and the thermal recording paper move in close contact with the upper surface when combined horizontally as shown in FIG. 3a, and the original and thermal recording paper when combined vertically as shown in FIG. 3b. Move in close contact with. Both cases are compact and easy to assemble.

[0017]

[Effect of device]

 As described above in detail, according to the present invention, the following effects are expected. The image sensor that reads the original and the thermal head that prints out on the thermal recording paper are integrated, and the shift register is shared, so that this part can be downsized, the cost can be reduced, and the assembly of the device can be simplified. be able to.

In the copy operation of the conventional device, the image read by the image sensor unit is temporarily stored in the memory through the shift register and then printed by the thermal head unit. In the present invention, the image sensor unit is used. The above data can be printed in the thermal head section as the data of the same line, so that the copying operation can be speeded up.

[Brief description of drawings]

FIG. 1 is a diagram showing a block configuration of a document reading and outputting apparatus of the present invention.

FIG. 2 is a timing chart of each signal of this device.

3A and 3B are views showing the outer shapes of the image sensor portion and the thermal head portion of the present invention, FIG. 3A is an outer shape diagram when combined in a horizontal type, and FIG. 3B is a outer shape diagram when combined in a vertical type. FIG.

FIG. 4 is a diagram showing a block configuration of a conventional image sensor unit.

FIG. 5 is a timing chart of each signal of the conventional image sensor unit.

FIG. 6 is a diagram showing a block configuration of a conventional thermal head unit.

FIG. 7 is a timing chart of each signal of the conventional thermal head unit.

FIG. 8 is a diagram showing a structural example of a conventional read output device.

[Explanation of symbols]

 1 Light receiving element 2 Analog switch 3 Shift register 4 Latch circuit 5 Block driver 6 Resistance heating element 7 Multiplexer 10 Image sensor section 20 Thermal head section

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location G06K 17/00 560 GH04N 1/024

Claims (1)

[Scope of utility model registration request] 1. An original reading / outputting apparatus comprising an image sensor section having a light receiving element for reading an original and a shift register, and a thermal head section having a resistance heating element and a shift register for printing output on a thermosensitive recording paper. A multiplexer is provided in the preceding stage of the shift register, the shift register of the image sensor section and the shift register of the thermal head section are shared by the switching operation of the multiplexer, and the image sensor section and the thermal head section are integrated. A document reading and outputting device characterized in that.