JPH02239260A - Magnification varying device for copying device - Google Patents

Abstract

PURPOSE:To improve the operability for the change of the copy magnification to each fixed magnification by selecting a minimum magnification at the time of depressing an up key with a maximum magnification set and keeping the maximum magnification at the time of continuing depression of the up key and selecting the maximum magnification at the time of depressing a down key with the minimum magnification set and keeping the minimum magnification at the time of continuing depression of the down key. CONSTITUTION:In the first control mode, a CPU 101 changes the copy magnification to the minimum fixed magnification when the copy magnification is set to the maximum fixed magnification and an expansion key 10 + is depressed, and a CPU 101 changed the copy magnification to the maximum fixed magnification when the copy magnification is set to the minimum fixed magnification and a reduction key 10 -is depressed; and in the second control mode, the CPU 101 stops the change of the copy magnification at the maximum fixed magnification when the expansion key 10 + is continuously depressed, and the CPU stops the change of the copy magnification at the minimum fixed magnification when the reduction key 10 - is continuously depressed. Thus, the operability for the change of the copy magnification to each fixed magnification is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a variable magnification device for a copying machine. Il! Copying devices that copy stray original images onto copy sheets are well known. Furthermore, there is also known a device that enlarges or reduces the original image when copying, that is, a variable-reduction copying device. Furthermore, there is also known a device in which the copying magnification is changed for each fixed magnification. Here, the fixed magnification refers to several magnifications that are predetermined in the copying device. For example, when the actual magnification is 100%, the magnification side is 115%, 122%, 141%, and 9 as the reduction side
These are magnifications set such as 3%, 87%, 82%, and 71%. In some conventional variable-magnification copying devices, the copy magnification changes by a fixed magnification each time the enlargement key or reduction key is pressed. With this device, the copy magnification does not change even if you keep pressing each key. With this type of conventional device, when you want to change a large number of copy magnifications at once, you have to press one of the keys several times, which is cumbersome. Especially recently, there is a wide range of copying magnifications,
For example, it has come to range from 50% to 200%,
In such cases, having to press a key many times significantly reduces work efficiency. In conventional variable size copying equipment. In some cases, the copy magnification changes repeatedly at each fixed magnification while the enlarge or reduce key is pressed. For example, while the enlarge key is pressed, 115% → 122% → 141% → 115% → 122%
→ It changes as follows, and while the reduction key is pressed, 93% → 87% → 82% → 71% →
It changes like 93% → 87% →...
This type of conventional device has the disadvantage that if the timing of releasing a finger from a key is incorrect, the key operation must be performed again.

In any of the above conventional devices, when the copying magnification ranges over a wide range, for example from 50% to 200%, the maximum fixed magnification (200%) is changed to the minimum fixed magnification (50%).
) or vice versa is extremely tedious and time consuming. The object of the present invention is to improve the operability when changing the copy magnification for each fixed magnification. - The means for solving the above problem is a variable magnification device of a copying machine that can increase or decrease the copy magnification for each fixed magnification, and an enlargement key for increasing the copy magnification. , the reduction key to decrease the copy magnification, and the enlargement key to change the copy magnification to a fixed magnification one higher each time the enlargement key is pressed, and the reduction key to decrease the copy magnification by 1.
The first control mode changes the copy magnification to the next lower fixed magnification each time the key is pressed, and if the enlarge key is kept pressed, the copy magnification is increased by the fixed magnification at regular intervals, and the reduce key is kept pressed. and a control means having a second control mode for sequentially decreasing the copy magnification by a fixed magnification at regular intervals, wherein the control means performs the following control. In other words, when the enlargement key is pressed when the copy magnification is at the maximum fixed magnification in the first control mode, the copy magnification is changed to the minimum fixed magnification, and when the copy magnification is at the minimum fixed magnification in the first control mode, it is reduced. When the key is pressed, the copy magnification is changed to the maximum fixed magnification, and if the enlarge key is kept pressed in the second control mode, the change of the copy magnification is stopped at the maximum fixed magnification, and then reduced in the second control mode. This is a variable magnification device that stops changing the copy magnification at the minimum fixed magnification if the key is kept pressed. The control means in the variable power device according to the present invention has two variable power control modes. (First control mode) When the enlarge key is pressed once, the copy magnification is changed to a fixed magnification that is 81 times larger on the enlarged side, and when the reduce key is pressed once, it is changed to a fixed magnification that is one step smaller on the reduced side. ．． Also, if the magnification key is pressed when the maximum fixed magnification is set, the magnification is changed to the minimum fixed magnification, and if the reduce key is pressed when the minimum fixed magnification is set, the magnification is changed to the maximum. Change to fixed magnification. (Second control mode) When the magnification key is kept pressed, the magnification continues to be changed to the magnification side at fixed magnification intervals at regular intervals. On the other hand, if the reduction key is kept pressed, the magnification will continue to be changed to the reduction side at fixed magnification intervals at regular intervals. If the magnification changes to the maximum fixed magnification while the magnification key is held down, the magnification will remain at the maximum fixed magnification even if the magnification key is continued to be pressed. On the other hand, if the reduction key is kept pressed and the magnification changes to the minimum fixed magnification, the magnification will remain at the minimum fixed magnification even if the reduction key is continued to be pressed. Figure 1 shows a block diagram of a control device that controls the operation of the copying machine. Although the mechanical configuration of the copying device is not particularly illustrated, a conventional copying device using a conventionally known electrophotographic process can be used. The entire copying machine is controlled by a CPU located on the main control board 100.
This is done by IOI. This CPUIO1 includes a ROM containing a control program, a RAM as a working area, etc. Also connected are an output buffer 102 to which various cross current loads such as motors, clutches, and solenoids are connected, and an input buffer 103 to which various sensors, cassette mounting sensors, misfeed sensors, interlock sensors, etc. are connected.

or,. An operation unit 200 is connected to the CPU 101, and provides an interface for various display outputs, key input, etc. The operation section 200 is equipped with various input keys shown in FIG. 4 and a display section shown in FIG. 5.

In Figure 2, interrupt key 1 is pressed when performing an interrupt copy. Start key 2 is pressed when copying. Clear/stop key 3 is pressed when you want to change the set number of copies or stop continuous copying midway. The number of copies set key 4 is pressed when setting the number of copies. The density adjustment key 5 is pressed when adjusting the density of the copied image. The automatic density key 6 is pressed to perform automatic density adjustment. The paper selection key 7 is pressed depending on whether copy paper stored in the cassette or copy paper stored in the paper feed tray is selected. Book mode key 8 is pressed when copying a double-page spread document. The same-size key 9 is pressed when performing a same-size copy. The variable magnification key 10 is pressed when reducing or enlarging copying at the standard magnification. Zoom magnification key 1
1 is pressed to freely select the copy magnification. Magnification Table 12 lists standard magnification ratios that can be used as a guide when making reduced or enlarged copies. In FIG. 3, an interrupt display 51 lights up when an interrupt copy is in progress. The paper feed tray confirmation display 52 lights up when the paper feed tray runs out of paper. The toner replenishment display 53 lights up when the toner level falls below a certain amount. Master unit replacement display 5
4 lights up when the master reaches the end of its life. The misfeed display 55 lights up when a misfeed (paper jam) occurs. The copy number counter (status display) 56 displays the number of copies set using the copy number set key. Also, when an abnormality occurs, the status is displayed with a symbol.
The automatic density display 57 lights up during automatic density adjustment. The paper size display 58 displays the size of the paper set in the cassette or tray.The paper confirmation display 59 displays the size of the paper set in the cassette or tray.
Lights up if the paper direction or paper size does not match when using page continuous copying or right page copying. The page continuous shooting display 60 lights up in the page continuous shooting state. The right page designation display 61 lights up in the right page designation copy state.

A magnification display (status display) 62 displays the copy magnification. Also, when an abnormality occurs, the status is displayed numerically. The paper selection display 63 displays the cassette 1 or paper feed tray in which paper is being fed. A paper direction display 64 displays the direction of the paper set in the cassette or paper feed tray. 8Density adjustment display 65 displays the adjusted degree of darkness of the copy image. The paper end indicator 66 lights up when the paper in the cassette runs out. The paper feed tray set confirmation display 67 lights up when the paper feed tray is not securely set. The standby display 68 lights up when the machine is in standby mode. The copy ready display 69 lights up when the start key is pressed to perform copying. Returning to FIG. 1, the CPUIO 1 performs data communication with the optical control circuit 300 by serial communication. The optical control circuit 300 includes a scanner motor 301, a lens motor 303, a mirror motor 304, a scanner home position detection sensor 305 for detecting the stop reference position of each motor, a lens home position detection sensor 306, and a mirror home position detection sensor. 3
07 etc. are connected. Generally, in a copying machine, a light image of an original image is irradiated onto a photoreceptor by an exposure optical system. Inside the exposure optical system,
A lamp is provided to illuminate the original, multiple mirrors guide reflected light from the original to the photoreceptor, and a lens is placed in the optical path formed by each mirror. The lamp and some mirrors are fixed on a support called a scanner, and by moving the scanner along the document, the entire area of the document is illuminated by the lamp. The scanner motor 301 described above is a driving source for moving the scanner. Incidentally, when performing variable magnification copying, it is necessary to change the position of the above-mentioned lens and the position of some mirrors other than those fixed to the scanner. Lens motor 30 above
3 and mirror motor 304 are used when performing such operations. 4 and 5 are flowcharts showing part of the control executed by the CPUIOI in FIG. 1. These flowcharts particularly show control when the variable size key 10 is pressed to perform variable size copying. First, in step 1, it is checked whether the same size key is pressed. Next, in step 2, press the magnification key (
Check the up key, down key). By checking the same size key before checking the variable size key, the acceptance priority for the same size key is increased. If the same magnification key is pressed in step 1, the variable magnification key is not checked.

If the scaling key is pressed in step 2, the process advances to step 3 to carry out the process when the scaling key was pressed. If the scaling key is not pressed, the process advances to step 21 to check that the scaling key is not pressed.

In step 3, the contents of a counter (CTMAG) for counting the time the magnification key is pressed is increased by 1. At this time, CTM A. Check whether the value of G is 1 or not, and if it is 1, proceed to step 4. If it is not 1, proceed to step 31. CTMAG is designed to count the time that the variable magnification key is pressed so that even if the variable magnification key continues to be pressed, the variable magnification key is accepted at regular intervals. In step 4, it is determined whether the pressed magnification key is a down key or an up key. If it is a down key, proceed to step 5; if it is an up key, proceed to step 41. In step 5, it is checked whether the value of the fixed magnification counter (CTMAGA) is O or not. If CTMAGA=O, that is, the magnification is 50%, the process advances to step 51. CTMAGA#
If the magnification is other than 0, that is, 50%, the process proceeds to step 6.

In step 6, the contents of the fixed magnification counter (CTMAGA) are decremented by 1. This is because the down key among the magnification keys was pressed and the magnification when the key was pressed was other than 50%.

When the magnification key acceptance process is performed as described above, the buzzer sounds once to indicate that the key acceptance process has been performed (step 7), and the magnification change key set FLAG is set to 1 (step 8). do. This scaling key set FLAG determines whether to process when the scaling key is pressed for the first time or when the scaling key continues to be pressed, when performing scaling key acceptance processing. It is used for.

Then, in step 9, the fixed magnification counter (CT
Performs processing to set the actual magnification based on the value of MAGA). FIG. 5 shows a subroutine for this purpose. In step 61, a fixed magnification counter (
The corresponding magnification is selected according to the contents (0 to 11) of the variable magnification data buffer (DBM).
AG). In step 62, the magnification change data set in DBMAG in step 61 is transmitted to the optical control circuit 300 (FIG. 1). Optical control circuit 30
0, the positions of the scanner motor 305, lens motor 306, mirror motor 307, etc. are changed according to the received magnification data. Then, in step 63, a magnification display corresponding to the variable magnification data set in the variable magnification data bath sofa (DBMAG) is displayed on the magnification display section of the operation section. Returning to FIG. 4, if it is determined in step 2 that the variable magnification key is not pressed, the process proceeds to step 21.

In step 21, it is checked whether the variable magnification key set FLAG is 1, and if it is 1, the FLAG is reset to O (step 22), and the variable magnification key press time counter (
CTMAG) is also cleared to O (step 32). If it is determined in step 3 that CTMAG is not 1, the count value of CTMAG is checked in step 31. If CTMAG≧100, the count value of CTMAG is
Clear AG (step 32). That is, when the scaling key is held down, the scaling key can be pressed every time the value of CTMAG increases by 100. Also, this scaling key processing is checked approximately every 4 @sac, so if you keep pressing the scaling key, approximately 400a+se
The magnification changes every c. In step 4. If it is determined that the up key of the variable magnification keys is pressed, the process proceeds to step 41, where it is checked whether the value of the fixed magnification counter (CTMAGA) (7) is 11 or not. CTMAGA=11 or magnification 20
If it is 0%, the magnification cannot be increased any further, so proceed to step 43, and set the magnification key set FLAG=1.
Check whether it is true or not. If it is 1, this means that the magnification process has already been performed at least once (the up key has been pressed), so proceed to step 32 and do not change the magnification. As a result, the magnification is set to the maximum magnification (20
0%). If the variable magnification key set FLAG=O, first press this step 43 after pressing the up key.
, the value of CTMAGA= is reset to O, that is, the magnification is 50% (step 44).
). In other words, if you press the up key with the maximum magnification (200%) set, the minimum magnification (50%) will be selected. However, if you keep pressing the up key, the maximum magnification (200%) will be maintained. When it is determined in step 41 that CTMAGA≠11,
This means that the up key is pressed and the magnification when the key is pressed is a magnification other than the maximum magnification (200%).
At this time, in order to increase the magnification to the enlargement side, the contents of the fixed magnification counter (CTMAGA) are increased by 1. When CTMAGA=0 in step 5, that is, when the down key is pressed when the magnification is the minimum value of the reduction magnification, the process proceeds to step 5l, where it is checked whether the variable magnification key set FLAG=1. If it is 1, the magnification has already been changed at least once (in other words, the down key has been pressed), so the magnification is set to the minimum magnification (5
0%), step 32
Do not go to and change the magnification. Magnification key set FLAG=. If =O, this means that the process in step 51 is performed first after pressing the down key, so the value of CTMAGA is reset to 11, that is, the maximum fixed magnification 200% (step 52). That is, if the down key is pressed while the minimum magnification (50%) is set, the maximum magnification (200%) will be selected. However, if you keep pressing the down key, the minimum magnification (50%) will be maintained. According to the present invention, the operability when changing the copy magnification for each fixed magnification is improved.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a control system of a variable magnification device according to an embodiment of the present invention, Fig. 2 is a diagram showing a part of the operation keys of the variable magnification device, and Fig. 3 is a display of the variable magnification device. FIGS. 4 and 5 are flowcharts showing the control executed by the above control system. 10... Magnification key (enlargement key,
reduction key) 101...CPU

Claims (1)

[Scope of Claims] A variable magnification device for a copying device that can increase or decrease the copy magnification for each fixed magnification, comprising: an enlargement key for increasing the copy magnification; and a magnification key for decreasing the copy magnification. Each time the reduction key and the enlargement key are pressed, the copy magnification is changed to the next higher fixed magnification, and each time the reduction key is pressed, the copy magnification is increased by 1.
The first control mode changes to the lower fixed magnification, and when the enlarge key is held down, the copy magnification is increased sequentially by the fixed magnification at fixed time intervals, and when the reduction key is held down, the copy magnification is fixed at fixed time intervals. In a variable magnification device for a copying machine, the control means has a second control mode in which the magnification is sequentially decreased for each magnification; When the magnification key is pressed in the first control mode, the copy magnification is changed to the minimum fixed magnification, and when the reduction key is pressed when the copy magnification is at the minimum fixed magnification in the first control mode, the copy magnification is fixed to the maximum. If the magnification key is kept pressed in the second control mode, the copy magnification change is stopped at the maximum fixed magnification, and if the reduction key is kept pressed in the second control mode, the copy magnification is changed. A variable magnification device characterized by stopping at a minimum fixed magnification.