JPH0787251A - Image reader - Google Patents

Abstract

PURPOSE:To provide an image reader which does not need to conduct an operation for initializing a lens means and a reading means, at the time of turning on a power source in the next time, when the power supply is disconnected by shut-off control. CONSTITUTION:When a shut-off condition is satisfied, a control means 1 allows a reading means 10 to a part where it does not collide with a wall of an optical system, moves a lens means 2 to a position of magnification of initialization, and allows a storage means 7 to store shut-off execution. At the time of turning on a power source in the next time, it is decided to be shut-off in the previous time by the storage contents of the storage means 7, the initialization of the lens means 2 is not conducted, and only initialization of the reading means 10 is conducted. At the time of shut-off, the initialization of the reading means 10 is also conducted and at the time of turning on the power supply it is also possible to omit the initialization of the reading means 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power-off control (hereinafter referred to as a shut-off control) and a power-on control in an image reading apparatus which drives a reading system and a lens system of a variable magnification with a single driving source of an optical system. It relates to the control after raising.

[0002]

2. Description of the Related Art Conventionally, when the conditions for shutting off are met, for example, when it is determined that the device is not operated even after a lapse of a predetermined time from when the device is not operated, the power of the device is turned off. Control. Further, the control after the power is turned on is performed by the same setting method for the initial setting operation of the lens system and the reading system, regardless of whether the shutoff control was performed last time or artificially. Further, a shut-off control for moving the lens has been proposed (previously filed), but there is no one for moving the lens to the position of the default magnification.

[0003]

In the prior art system,
When the power was turned on, the time required for the initial positioning operation of the optical system lens was necessary. For example, even if an image reading start signal at 100% of the initial setting is generated immediately after start-up, before that, at least the reading system is used to prevent the reading system from hitting the wall of the optical system. Then, the lens position is returned from the position of the last final magnification to the position of the lens return position detection means, the lens movement operation is performed from there to the position of 100% which is the initial magnification, and then the reading means. Had to be returned to the return position. Therefore, the control time required for the initial operation of the lens may be short or long due to the influence of the lens position, etc. until the original image reading operation is performed, and the time until the execution starts until the reading starts is constant. There is a problem that there is no such problem, and at least the problem that the time required for retracting the reading system for moving the lens means becomes longer. There is also a proposal to move the lens system and the reading system at the time of shut-off, but the control configuration required at least the time to move to the position of the initial magnification of the lens system.

The present invention has been made to solve such a problem, and when the power is turned off by the shut-off control, the initial setting operation of the lens means and the reading means is performed at the next power-on. It is an object of the present invention to provide an image reading device that does not need to be performed.

[0005]

In order to achieve the above-mentioned object, in the present invention, an image reading device is constructed as in the following (1) to (5).

(1) The driving means for driving the reading means,
An image reading apparatus that also serves to drive magnification change of the lens means by switching by the lens drive switching means, and shutoff condition detecting means for detecting shutoff conditions,
Storage means for storing that the shutoff control is performed,
When the shut-off condition detecting means detects the shut-off condition, the lens means is driven to the position of the default magnification, and the storage means stores the fact that the shut-off control is performed, and when the power is turned on. An image reading apparatus further comprising: a control unit that changes an initial driving method of the lens unit according to the stored content of the storage unit.

(2) A lens return position detecting means for detecting that the lens means is at its return position is provided, and the control means detects the lens means by the lens return position detecting means when a shutoff condition is detected. The image reading apparatus according to (1) above, which is driven to a position at an initially set magnification with reference to the return position.

(3) When the shut-off condition is detected, the control means obtains the position of the lens means from the magnification of the lens means at that time, and obtains the direction and distance from this position to the position of the initially set magnification. The image reading device according to (1), wherein the lens means is driven to a position of a default magnification.

(4) The driving means for driving the reading means,
An image reading apparatus that also serves to drive magnification change of the lens means by switching by the lens drive switching means, and shutoff condition detecting means for detecting shutoff conditions,
Storage means for storing that the shutoff control is performed,
When the shut-off condition detecting means detects a shut-off condition, the lens means is driven to a position of a default magnification, and then the reading means is driven to a default position and shut-off to the storage means. An image reading apparatus comprising: a control unit that stores that control has been performed, and that, when the power is turned on, the lens unit and the control unit that changes the initial driving method of the reading unit according to the stored contents of the storage unit.

(5) The control means is provided with a lens return position detection means for detecting that the lens means is at the return position and a read return position detection means for detecting that the reading means is at the return position. When a shut-off condition is detected, the lens means is driven to a position of an initial magnification based on the return position detected by the lens return position detecting means, and the reading means is moved to the reading return position detecting means. The image reading apparatus according to (4) above, which is driven to a position that is initially set with reference to the position detected in (4).

[0011]

In the configurations (1) to (3), when the shut-off condition is detected, the control means drives the lens means to the position of the default magnification, and the shut-off control is performed. When the power is turned on and the storage means stores the fact that the shutoff control is performed, it is not necessary to initialize the lens means.

In the configurations of (4) and (5), when the shut-off condition is detected, the control means drives the lens means to the position of the default magnification, and then the reading means moves to the default position. When the power is turned on, the storage means stores the fact that the shut-off control is performed, and when the shut-off control is performed when the power is turned on, the initial setting of the lens means and the reading means is performed. You don't have to.

[0013]

EXAMPLES The present invention will be described in detail below with reference to examples.

(Embodiment 1) FIG. 1 is a block diagram showing the relationship between the control means and each means in the "image reading apparatus" according to the first embodiment. In the figure, thin arrows indicate electrical connections, and the directions of the arrows represent the directions of signals. Thick arrows indicate the mechanical action, and the direction indicates the action direction.

FIG. 2 is a schematic diagram of a drive transmission system of the optical system of this embodiment. In FIG. 2, the type and direction of the arrow have the same meaning as in FIG. However, the direction of the thick arrow indicates the moving direction.

First, the structure and operation of the main part of this embodiment will be described with reference to FIG. The reading unit 10 (not shown) is driven by an optical driving unit 12 including a driving motor, and the optical driving unit 12 drives the pulley 5. The reading means 10 cannot cut the drive transmission path, and when the optical driving means 12 is driven, the reading means 10 moves according to the driving direction. In the present embodiment, when the optical driving means 12 is driven in the direction a, the reading means 10
Moves to the read return position detecting means 8 side (direction of a1).

The lens means 2 is means for determining the magnification of the lens, and the lens drive switching means 3 is means for determining whether or not to drive the lens means 2 in order to match the magnification at the time of reading. That is, the lens drive switching means 3
Then, the gear 4 is moved to determine whether or not the lens means 2 is driven. A solenoid is used for this means 3, and this lens drive switching means 3 moves the gear 4 to the arrow b.
Move in the direction of. Then, the gear 4 is the optical drive means 1
It is connected to a gear 21 connected to a pulley 5 driven by 2. Therefore, the lens means 2 has the pulley 5 → the gear 21.
The driving force is transmitted through a path of → gear 4 → gear 22 → wire → lens means 2. This lens drive switching means 3
Then, when the reading means 10 is driven, it is determined whether or not the lens means 2 is driven. When the pulley 5 rotates in the direction a, the lens means 2 moves in the direction a2.

Further, the lens return position detecting means 9 uses a photo sensor to detect the position of the lens means 2 with a flag 22 provided on the lens means 2. Even if the lens means 2 moves in the direction of the arrow a2 to the maximum, the flag 22 does not come out. Therefore, for example, in order to align the lens, the control means 1 controls the lens return position detection means 9. By checking the presence / absence of a signal, it is possible to determine in which direction the movement should be made.

Similarly to the flag 22 of the lens means 2, the read return position detecting means 8 can detect the position of the reading means 10 by being blocked by a flag (not shown) provided in the reading means 10. . Further, as with the lens means 2, the length of the flag is set to a length that is detected by being blocked even if it is moved to the maximum in the direction of a1, so that the reading means 10 detects the presence or absence of the read return position detection signal. It is possible to determine the moving direction of.

The shut-off control will be described below in sequence.

For example, when it is determined that the control means 1 satisfies the shutoff condition because the operation means 6 has not been operated for a predetermined time, the control means 1 executes the shutoff control flow shown in FIG. . Control means 1
Does not turn off the power immediately, but performs the following control. This will be described below with reference to FIGS.

The optical driving means 12 is driven to drive the lens means 2
After moving the reading means 10 of the optical system, which moves even during the control of, from the home position where the reading means 10 is on standby to a predetermined position where it does not hit the wall of the optical system. (In this case, the direction opposite to a1), the optical driving means 12 is stopped and the reading means 10 is stopped.
Is avoided (processing of S1 in FIG. 3). By this operation,
Wherever the position of the lens means 2 is, the reading means 10
Is prepared so that the lens unit 2 can be moved by default without hitting the wall.

After the avoidance movement of the reading means 10 is completed, the control means 1 then drives the lens drive switching means 3 to move the gear 4 for moving the lens means 2 and to the lens means 2. Prepare to transmit the drive of (S
2). Next, in order to carry out the positioning of the lens means 2, it is checked whether the flag 22 of the lens means 2 turns off the lens return position detection means 9 based on the signal of the lens return position detection means 9 to obtain the lens. The direction of movement of the means 2 is determined (S3).

Here, when the flag 22 of the lens means 2 is inside the lens return position detecting means 9,
Since the control as will be described later is performed (after S7 processing), the description thereof will be omitted here.

When the flag 22 is not detected by the lens return position detection means 9, that is, when the position where the lens means 2 exists is outside the lens return position detection means 9, the control means 1 controls the direction of the arrow a2 (reduction direction). To (S
4). When the optical drive means 12 is driven in the direction of the arrow a2, the lens means 2 is moved, and the lens return position detection means 9 detects the flag 22 of the lens means 2 (S5, YE).
S), the control means 1 stops the optical driving means 12 (S6). After that, the same control as that performed when the lens position detection unit 9 is detected, which has been described above, is performed. The description will be given below.

The lens return position detecting means 9 is replaced by the lens means 2
When it is blocked by the flag 22 of this time, this time the arrow a2
By driving the optical driving means 12 in the opposite direction of the direction (S7), the lens return position detecting means 9 to the lens means 2 are moved.
From the position where the flag 22 is removed (immediately after S8, NO), the optical driving means 12 is driven by an amount corresponding to the same size position and then stopped (S9), and then lens drive switching is performed. The driving of the means 3 is stopped (S10).

After completion of this series of operations, the fact that the above shut-off control has been performed is stored in the storage means 7 (S1).
1) Next, a shut-off process is performed, the shut-off means 11 is driven, and power supply to the apparatus main body is controlled to be cut off (S12).

In this way, the control means 1 performs the shut-off control, so that the lens means 2 will be turned on at the next power-on.
Is in the position of the initial magnification (1 × in this embodiment).

Further, in this embodiment, the shutoff means 1
As No. 1, a main switch with a shut-off mechanism in which a solenoid is provided on the main switch itself is used. The shutoff processing is realized by driving the shutoff means 11 and turning off the main switch.

When the power switch is turned on, the control means 1 controls as follows. This control will be described with reference to FIG.

The control means 1 calls the information from the storage means 7 in order to check the state when the power supply was turned off last time, and then sets the information that the shutoff control is not performed in the storage means 7 ( S21).

Next, based on the information in the storage means 7 called up earlier, when the shutoff is not performed last time (S22, NO), normal initial control of the optical system is performed (S23).

If the shutoff control was previously performed (S22, YES), the positional relationship of the lens means 2 is controlled by the shutoff control so as to match the initial setting position. The initial setting of the reading operation can be performed only by the initial alignment operation (S24).

Next, the initialization control of the reading means 10 shown in FIG. 5 will be described. First, the reading means 10 is moved in the direction a1 by the optical driving means 12 until it is detected by the reading position return detection means 8 (S31, S32).
When the return position is detected (S32, YES), the optical drive means 12 is further moved by a predetermined distance (S).
33), the optical driving means 12 is stopped (S34), and the initial setting of the optical system is completed.

Further, as described above, when it is not stored that the shutoff control is performed when the power is turned on, the lens means 2 and the reading means 1 shown in FIG. 6 are shown.
It is necessary to control the initial setting of 0. That is, since it cannot be determined whether or not the position of the reading unit 10 for initializing the lens unit 2 exists at a position where it does not collide with a wall or the like, processing for avoiding the reading unit 10 is performed (S41, S42). After that, it is necessary to initialize the lens means 2 (S43 to S51) and further initialize the reading means 10 (S52).

That is, in this embodiment, when the shutoff control is performed last time, the time for performing the operations of S41 to S51 can be saved, and the waiting time for shifting to the image reading operation can be shortened. it can.

(Embodiment 2) This embodiment has the same hardware configuration as that of Embodiment 1, but the shutoff control operation is performed as shown in FIG. As shown in the figure, the operation from step 1 to step 10 is the same, but in the following step 13, the reading means 10 is initialized.
Thereafter, as in the first embodiment, the shutoff execution is stored in the storage means 7 in step 14, and the shutoff processing is performed in step 15. In step 13, the reading means 10 is moved until it is detected by the reading return position detecting means 8 in the direction a1, and further moved from the returning position by a predetermined amount, and then the optical driving means 12 is stopped.

In this embodiment, as described above, the initialization of the reading means 10 is also performed in the shut-off control. Therefore, when the power is turned on next time, the lens means and the reading means are set as shown in FIG. The initial setting of 10 does not need to be performed together, and the waiting time for moving to the image reading operation can be further shortened.

(Third Embodiment) In the first embodiment, the lens return position detecting means is used to move the lens in the shut-off control. The same effect can be obtained by calculating the amount of movement corresponding to the position of the magnification by the control means, and driving the optical driving means 12 by the amount of movement that results from the rotation direction. This example will be described as a third embodiment. FIG. 9 is the general flow (the processing of the first reading means 10 is omitted), and the movement amount of the lens means 2 from the current time point to the target equal magnification is calculated (S61), and the movement amount is 0. At this time, that is, at the same size position, the shutoff execution is stored in the storage means 7, and the shutoff processing (S6) is performed.
Perform 9). Otherwise (S62, NO), the lens means is moved by the amount of movement (S66). However, there are cases where the movement amount becomes a positive value and a negative value.
64), it is solved by giving directionality. The gear 4 is disengaged from the gear 21 by the lens drive switching means 3, the lens means 2 is stopped, and the reading means 10 is moved by an amount corresponding to the driving of the lens means 2 to complete the initial setting (S67). Thereafter, the shutoff execution is stored in the storage means 7 (S68), and the shutoff processing is performed (S69).

[0040]

As described above, according to the present invention, when the power is turned off by the shut-off control last time, it is not necessary to perform the initial setting operation of the lens means and the reading means when the power is turned on. The time required to start reading can be shortened as compared with the case where the power is artificially turned off.

[Brief description of drawings]

FIG. 1 is a block diagram of a first embodiment.

FIG. 2 is a schematic diagram of a drive transmission system of an optical system in Example 1.

FIG. 3 is a flowchart showing the operation of shutoff control in the first embodiment.

FIG. 4 is a flowchart showing an operation when power is turned on in the first embodiment.

FIG. 5 is a flowchart showing an operation of initial setting of the reading unit in the first embodiment.

FIG. 6 is a flowchart showing an operation of initial setting when shutoff control is not performed in the first embodiment.

FIG. 7 is a flowchart showing the operation of shutoff control in the second embodiment.

FIG. 8 is a flowchart showing an operation when power is turned on in the second embodiment.

FIG. 9 is a flowchart showing the operation of shutoff control in the third embodiment.

[Explanation of symbols]

 1 Control Means 2 Lens Means 7 Storage Means 10 Reading Means

Claims (5)

[Claims] 1. An image reading apparatus in which a driving means for driving the reading means also serves to drive a magnification change of the lens means by switching by a lens drive switching means, and a shutoff condition detecting means for detecting a shutoff condition. When the shut-off condition is detected by the storage unit that stores that the shut-off control is performed, the lens unit is driven to the position of the default magnification and the shut-off is performed in the storage unit. An image reading apparatus comprising: a control unit that stores the fact that the control has been performed, and that changes the initial driving method of the lens unit according to the stored contents of the storage unit when the power is turned on. . 2. A lens return position detection means for detecting that the lens means is in its return position, and the control means comprises:
2. The image reading apparatus according to claim 1, wherein when the shut-off condition is detected, the lens means is driven to a position of an initial magnification based on the return position detected by the lens return position detecting means. apparatus. 3. The control means, when detecting the shutoff condition, obtains the position of the lens means from the magnification of the lens means at that time, and obtains the direction and distance from this position to the position of the initially set magnification, The lens means is driven to a position of a default magnification.
The image reading device described. 4. An image reading device in which the driving means for driving the reading means also serves to drive the magnification change of the lens means by switching by the lens drive switching means, and a shutoff condition detecting means for detecting a shutoff condition, When the shut-off condition is detected by the storage unit that stores the fact that the shut-off control is performed and the shut-off condition is detected by the shut-off condition detection unit, the lens unit is driven to the position of the default magnification, and then the reading unit is initialized. While driving to the set position, the storage means stores the fact that the shutoff control has been performed, and when the power is turned on, the initial drive of the lens means and the reading means is performed according to the stored content of the storage means. An image reading apparatus comprising: a control unit that changes the method. 5. A lens return position detecting means for detecting that the lens means is at its return position, and a read return position detecting means for detecting that the reading means is at its return position, wherein the control means is a shut. When an off condition is detected, the lens means is driven to a position of an initial magnification based on the return position detected by the lens return position detection means, and the reading means is read by the read return position detection means. The image reading apparatus according to claim 4, wherein the image reading apparatus is driven to an initial setting position based on the detected position.