JP2670878B2 - Magnification switching control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a magnification switching control apparatus suitable for a variable-magnification original image forming apparatus such as an electrophotographic copying machine or a laser printer having a variable magnification function. Regarding

<Prior Art> Conventionally, in an electrophotographic copying machine having a variable magnification function, when a magnification is selected by a magnification selection key, the display is immediately switched to the selected magnification and an optical image for projecting an original image on a photoconductor is provided. The positions of the lens and the mirror of the system are moved to the positions corresponding to the selected magnification, and the scanning speed of the mirror and the lamp is switched to the speed corresponding to the magnification.

<Problems to be Solved by the Invention> However, when the switching operation of the optical system such as the lens and the mirror is performed immediately in response to the operation of the magnification selection key, the operation of the magnification selection key is not performed. Even if it is wrong, the switching operation of the optical system is performed, and there is a disadvantage that the optical system performs unnecessary operation.

The present invention has been made in view of the above points,
The purpose is to eliminate the switching operation of the optical system due to an error in the magnification selection operation as much as possible.

<Means for Solving the Problems> In order to achieve the above object, the present invention is configured as follows.

The present invention is a magnification switching control device for moving and projecting an optical system in accordance with a set magnification of a document image on a photoconductor, and a magnification operation unit for setting a copy magnification to a desired magnification ( 2), a start operation section (3) for designating the start of the document image projection operation, a display section (7) for displaying the magnification set by the magnification operation section (2), and an optical system as necessary. Driving means (10) for moving in accordance with the magnification, and magnification operation section (2)
The measurement means (12) for starting the measurement of the required time in response to the operation of (1) and the processing for controlling the drive means (10) after waiting for the measurement by the measurement means (12), and the start operation part (3). The control means (11) performs a process of controlling the driving means (10) without waiting for the end of measurement when is operated.

In the present invention as described above, since the optical system does not move immediately in response to the magnification setting operation and the required time elapses, the user sets the magnification ratio relatively quickly, that is, before the required time elapses. Even if it is determined that the operation is wrong, if the magnification setting operation is performed again, there is no waste of moving the optical system many times as in the conventional case. Moreover, when the magnification setting operation is performed again, the required time elapses again, so that the magnification setting operation can be performed again and again. Furthermore, in the waiting time before moving the optical system, when the user determines that the previous magnification setting operation is correct and operates the start operation unit, move the optical system without waiting for the required time. You can

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and the electrophotographic copying machine of this embodiment has a variable magnification function.

As shown in FIG. 2, the operation panel 1 has a scaling switch 2 operated to select a magnification, a copy button 3 operated to start copying, and a copy number setting for setting the number of copies. Various selection keys 6 such as the key 4 are provided, and a display unit 9 such as a magnification display unit 7 for displaying the selected magnification and a number display unit 8 for displaying the number of copies.

The optical system drive mechanism 10 is controlled by a microcomputer 11 which controls each part, and moves a lens, a mirror, etc. of an optical system for projecting an original image on a photoconductor to a position corresponding to the magnification change and responds to the magnification change. It is designed to move mirrors and lamps at operating speed.

According to the first aspect of the present invention, in order to eliminate as much as possible the switching operation of the optical system due to an error in the operation of selecting the magnification, it is predetermined in response to the operation of the magnification changeover switch 2 for selecting the magnification. The microcomputer 11 as the control means is provided with the timer 12 as the measuring means for starting the measurement of the time, and in response to the operation of the magnification changeover switch 2, only the magnification display of the magnification display section 7 is switched to the selected magnification. At the same time, the magnification changeover switch 2 is not operated during the measurement period of the predetermined time, and when the measurement period ends, the optical system drive mechanism 10 is controlled to control the optical system.
The switching is made according to the selected magnification.

That is, when the magnification changeover switch 2 is operated and the magnification is selected, the selected magnification is immediately displayed on the magnification display section 7 and the timer 12 sets a predetermined time.
For example, when the measurement for 2 seconds is started and the magnification changeover switch 2 is not operated again during the measurement period, when the measurement period ends, the lens or mirror of the optical system is moved to the position corresponding to the magnification. In addition, the clutch and the like are switched so that the scanning speed corresponds to the magnification.

In this way, when the magnification changeover switch 2 is operated, only the display on the magnification display section 7 is immediately changed over, and the optical system is changed over after the measurement period ends.
Even if the magnification changeover switch 2 is erroneously operated, the redoing of the operation during the measurement period prevents the optical system from being switched based on the erroneous operation.

FIG. 3 is a flowchart corresponding to the above operation.

First, in step n1, when the magnification changeover switch 2 is turned on, the process moves to step n2 to change the display of the magnification display unit 7 to step n3, and whether or not the magnification changeover switch 2 is turned off, that is, the operation is performed. It is determined whether or not has finished, and when it is determined that it has finished, the process moves to step n4 to start measuring a predetermined time by the timer 12 and then moves to step n5. If it is determined in step n3 that the operation for switching the magnification has not been completed, it is determined that the auto-repeat is one in which the selected magnification is sequentially switched over the period in which the magnification switch 2 is turned on, and the process returns to step n2 to further multiply the magnification. Switch the display of.

In step n5, it is determined whether or not the time measured by the timer 12 has expired. If not, step n7
Then, it is judged whether or not the magnification changeover switch 2 has been turned on again.
Returning to n2, the display of the magnification display section 7 is switched, and when the magnification switch 2 is turned off, the time measurement by the timer is restarted (step n4). Therefore, the switching operation of the optical system is not performed during the operation of the magnification changeover switch 2.
On the other hand, when it is determined in step n7 that the magnification changeover switch 2 is not operated, the process returns to step n5.

When it is determined in step n5 that the time measured by the timer 12 has expired, the process proceeds to step n6, in which the optical system drive mechanism 10 is controlled to move the optical system to a position corresponding to the selected magnification, and the scanning speed is Switch the clutch to the corresponding speed.

As described above, according to the first aspect of the present invention, when the magnification changeover switch 2 is scanned, only the display on the magnification display unit 7 is immediately changed over, and the optical system is changed over after the measurement period is completed. Therefore, even if the scanning of the magnification changeover switch 2 is erroneous, the operation of the magnification changeover switch 2 is redone during the measurement period, so that the optical system is not switched based on the erroneous operation.

FIG. 4 is a flow chart for explaining the operation of the invention described in claim 2.

According to the second aspect of the present invention, the microcomputer 11 as the control means switches only the magnification display of the magnification display section 7 to the selected magnification in response to the operation of the magnification changeover switch 2 and is predetermined. When the copy button 3 is operated during the time measurement period, or when the measurement period ends without operating the magnification changeover switch 2 during the measurement period, the optical system is changed to the selected magnification. I am trying to switch according to.

That is, in the above-mentioned invention according to claim 1, the optical system is not switched until the measurement of the predetermined time is completed, but according to the present invention according to claim 2, When the copy button 3 is operated during the time measurement period, it is assumed that there is no error in the selection operation of the magnification changeover switch 2, and the optical system is switched immediately without waiting for the end of the measurement period. . Other configurations are the same as the above-mentioned invention.

Referring to FIG. 4, first, when the magnification switch 2 is turned on in step n1, the process moves to step n2 to switch the display of the magnification display section 7 to step n3, and the magnification switch 2 is turned off. It is determined whether or not the operation has been completed, that is, whether or not the operation is completed. When it is determined that the operation is completed, the process moves to step n4, the timer 12 starts measuring a predetermined time, and the process moves to step n5. When it is determined in step n3 that the operation for switching the magnification has not ended, it is determined that the auto-repeat is one in which the magnifications selected are sequentially switched over the period in which the magnification switch is turned on, and the process returns to step n2. Further switch the display of the magnification.

In step n5, it is determined whether or not the time measured by the timer has expired. If not, the process proceeds to step n7 to determine whether or not the copy button 3 has been operated, and when the copy button 3 has been operated. , If the copy button 3 is not operated, the process proceeds to step n8 to determine whether or not the magnification changeover switch 2 has been turned on again. If it is determined that it has been operated, the process returns to step n2. If it is determined that the operation has not been performed, the process returns to step n5.

When it is determined in step n5 that the time measured by the timer 12 has expired, the process proceeds to step n6 to control the optical system drive mechanism 10 to move the optical system to a position corresponding to the selected magnification, and Switch the clutch to the corresponding speed.

Thus, according to the present invention of claim 2, like the invention of claim 1, even if the operation of the magnification changeover switch 2 is made erroneously, the operation of the magnification changeover switch 2 is redone during the measurement period. This prevents the optical system from being switched based on the erroneous operation. Further, when the operation of the magnification changeover switch 2 is correct and the copy button 3 is operated, the optical system is changed over without waiting for the end of the measurement period. Will be shortened.

<Effects of the Invention> As described above, in the present invention, when the user performs the magnification setting operation relatively quickly again after the user performs the magnification setting operation, the optical system is not moved unnecessarily. Even if the setting operation is incorrect, the document image forming operation can be relatively quickly started. Moreover, the magnification setting operation can be repeated any number of times during the required time. further,
During the waiting time until the required time elapses, that is, until the optical system is moved, when the user operates the start operation unit after determining that there is no mistake in the previous magnification setting operation, the required time is awaited. Since the optical system can be moved without doing so, it is possible to move to the original image forming operation without waiting time. Thus, usability is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of the present invention, FIG. 2 is a front view of an operation panel, FIG. 3 is a flowchart for explaining the operation of the invention described in claim 1, and FIG. 4 is described in claim 2. 6 is a flowchart for explaining the operation of the invention. 2 ... Magnification changeover switch (selection operation part), 3 ... Copy button (start operation part), 7 ... Magnification display part, 11 ... Microcomputer (control means), 12 ... Timer (measurement means).

Claims (1)

(57) [Claims] 1. A magnification switching control device for projecting an original image on a photoconductor by moving an optical system in accordance with a set magnification, and a magnification operation section for setting a copy magnification to a desired magnification. (2), a start operation section (3) for designating the start of the document image projection operation, a display section (7) for displaying the magnification set by the magnification operation section (2), and an optical system are required. Driving means (1
0), a measuring means (12) for starting the measurement of the required time in response to the operation of the magnification operation part (2), and a driving means (10) after waiting for the measurement by the measuring means (12) to finish.
And a control means (11) for controlling the drive means (10) without waiting for the end of measurement when the start operation part (3) is operated. Magnification switching control device.