JP2002008490A - Switching device and picture forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switching device which is capable of preventing from being turned off under an ON state. SOLUTION: Under a switch is an ON state as shown in Fig (a), electronic current does not flow in a solenoid 2, and a lock-lever 10 and a pushbutton 1a are separated. If push the button under the above state, the switch is turned off as shown in Fig. (b) and if push the button again, the switch is turned on as shown in Fig (a). To prevent the switch from being turned off suddenly under an ON state, a drive axis 2a is drawn to the direction of an arrow in Fig. by making electric current flow to a solenoid, then a lock-lever is turned, as a result, a lock member 10a locks the pushbutton 1a so as not to allow a operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch device which is turned on / off by operating an operation member such as a push button, and an image forming apparatus provided with the switch device.
In particular, a switch for turning on / off the power supply is suitable for use when it is not necessary to suddenly turn off the power supply from the on state.

[0002]

2. Description of the Related Art Normally, power is supplied to and cut off (ON / OFF) from various electronic devices operated by electric energy.
The switch is provided, and the device is operated or stopped by operating the switch. 2. Description of the Related Art In general electronic devices, a user can arbitrarily operate a switch.

[0003]

However, there are some electronic devices that are not easily turned off while the device is operating. For example, there are cases where the device performs post-processing after operation, during high-speed reciprocating motion operation (for example, during operation of the scanner of the image forming apparatus), and when a personal computer or the like accesses the hard disk.

According to the present invention, in such a case, even if the user tries to turn off the switch unexpectedly while the device is operating,
An object of the present invention is to provide a switch device that cannot be turned off and an image forming apparatus provided with the switch device.

[0005]

In order to achieve the above object, in a switch device according to the present invention, there is provided a switch device in which an on / off operation is performed by changing a position of an operating member and switching a contact. A movable lock member for locking the operation member to the ON position, a drive unit for selectively moving the lock member between the lock position and the unlock position, and a control unit for controlling the drive unit are provided.

Further, in the image forming apparatus according to the present invention, a movable lock for locking the operation member in the ON position in the switch device in which the operation member is turned on / off by changing the position of the operation member and switching the contact point. A member, driving means for selectively moving the locking member between a locked position and an unlocked position, and control means for controlling the driving means are provided.

In the switch device and the image forming apparatus, the driving means comprises a solenoid whose drive shaft is connected to a lock member, and the control means controls the operation of the solenoid and controls the operation of the electronic device such as the image forming apparatus. It may control the operation of the device. Further, the power supply of the electronic device such as the image forming apparatus may be turned on / off by the on / off operation of the switch device. Further, the lock in the image forming apparatus may be performed for a certain period of time.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a switch device according to an embodiment of the present invention and an electronic apparatus such as an image forming apparatus using the switch device. In FIG. 1, AC
AC power from the line is supplied to DC through the main switch 1.
The power is supplied to the power supply 3. When the main switch 1 is ON, the DC power supply 3 converts AC power into DC power and supplies it to the controller 4 of the electronic device. This DC power is supplied not only to the operation of the controller 4 but also to a switch-on maintaining solenoid 2 connected to the controller 4, a sensor 5, a solenoid 6, a clutch 7, a clutch 8, a motor 8, an operating unit 11, etc. It is also used to operate.

When the main switch 1 is turned on or an input is subsequently made from the operation unit 11, the controller 4 starts operating and operates the solenoid 6, the clutch 7, the motor 8 and the like while reading information from the sensor 5 and the like. Control to operate or stop.

In this case, when the controller 4 determines that it is not necessary to turn off the power suddenly based on the operation sequence of the actuators in the various electronic devices or the output state of the sensor 5 or the like, the controller 4 keeps the switch ON. (Hereinafter referred to as “solenoid”) 2 is energized to operate (O
N). As a result, the push button of the main switch 1 is locked at the ON position, as described later, so that even if the user tries to turn it off, it cannot be turned off.

Thereafter, when it is determined that there is no problem even if the power supply is cut off, the power supply to the solenoid 2 is cut off and the solenoid 2 is stopped (OFF).

FIG. 2 is a block diagram showing a lock structure of the main switch 1. As shown in FIG. In FIG. 2, (a) shows a switch OF
The state of F, (b) is a switch ON state and suddenly switch O
(C) shows a state where the switch is turned on and it is not necessary to turn off the switch suddenly.

The main switch 1 has a push button 1a as an operation member, and the ON / OFF operation is obtained by pushing the push button 1a to change the position and switch the contact. The drive shaft 2a of the solenoid 2 includes:
A lock lever 10 rotatably supported by a shaft 12 is pivotally supported by a pivot 13, and the drive shaft 2a is urged by a spring 9 in the direction of arrow a. The lock lever 10 is provided with a protruding lock portion 10a at the tip thereof.

In the state of FIG. 2A, the main switch 1
Is in the OFF state, the DC power supply 3 in FIG. 1 does not operate, and the controller 4 and the solenoid 2 do not operate. Therefore, the solenoid 2 holds the drive shaft 2a and the lock lever 10 in the illustrated positional relationship by the urging force of the spring 9. In this state, the operator of the main switch 1 can press the push button 1a at any time to turn from OFF to ON.

FIG. 2B shows a state in which the push button 1a is pressed to turn on the switch from the state of FIG. Since this state is a state in which the switch can be suddenly turned off, the controller 4 does not operate the solenoid 2, and the drive shaft 2a and the lock lever 10 have the same positional relationship as in (a). Therefore, the operator can press the push button 1a at any time in this state to
N → OFF can be set.

In the state shown in FIG. 1C, the main switch 1 is in the ON state, and it is difficult to turn off the switch 1 suddenly. In this state, the controller 4 operates by energizing the solenoid 2. For this reason,
The drive shaft 2a is retracted in the direction of arrow b against the urging force of the spring 9, and in response, the lock lever 10 rotates counterclockwise to move to the lock position shown in the drawing, and the lock portion of the lock lever 10 10a is pressed against the push button 1a and locks the push button 1a to the 0N state. Therefore, in this state, the operator cannot press the push button 1a and cannot turn the main switch 1 from ON to OFF.

In this embodiment, the main switch 1
As a means for maintaining the ON state of the
Although the method of fixing the push button 1a by the lock lever 10 has been described, the present invention is not limited to this means, and it is needless to say that various devices can be easily considered. For example, a structure (not shown) in which a cover-shaped object that covers the push button 1a by the solenoid 2 may be moved. In this case, although the push button 1a is not directly locked, the operator cannot touch the push button 1a because the push button 1a is covered with the cover, and the operator is substantially locked. The switch 1 cannot be turned from ON to OFF.

Further, the invention of claim 2 applies the switch device having the ON state maintaining function described above to an image forming apparatus. 2. Description of the Related Art In an image forming apparatus having a charging wire such as a copier, a printer, and a facsimile, when a high voltage is applied to the charging wire during an image forming process, ozone is generated from the charging wire. If this ozone is left as it is, it will cause a nox to adhere to the charging wire or react with the photoreceptor to adversely affect both.

Therefore, these image forming apparatuses are designed to have an airflow that diffuses ozone generated during the image forming process, or have an ozone diffusing fan, and operate the fan even after the image forming is completed. Post-processing such as continuing is performed. For this reason, in these image forming apparatuses, if the power is cut off immediately after the image forming process, the charging wire and the photoconductor are adversely affected, and a desired image quality cannot be obtained.

Therefore, the embodiment of the invention of claim 2 is
In order to solve the above-described problem of the image forming apparatus, after applying a high voltage to the charging wire during an image forming process or the like, the switch is maintained in the ON state for a certain period of time as described in the above embodiment. An image forming apparatus including a switch device having an ON state maintaining function, which is controlled so as not to be turned OFF.

[0021]

As described above, according to the present invention, when it is not necessary to operate the switch from ON to OFF, the switch is locked in the ON state so that the switch cannot be turned OFF. Power is suddenly cut off during post-processing after operation, during high-speed reciprocating motion (scanner operation of image control device, etc.), or when a personal computer etc. is accessing the hard disk. Can be prevented.

In the above example, the post-processing after the operation of various electronic devices can be surely terminated, the device can be prevented from being broken or damaged due to the runaway of a high-speed moving object, and the hard disk can be prevented. Can be prevented from being destroyed or data from being lost.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a switch device according to an embodiment of the present invention and an electronic device using the switch device.

FIG. 2 is a configuration diagram showing a configuration example and operation of the embodiment of the present invention.

[Description of Signs] 1 Main switch 1a Push button 2 Switch ON maintaining solenoid 2a Drive shaft 3 DC power supply 4 Controller 9 Spring 10 Lock lever 10a Lock section 11 Operating section 12 Axis 13 Axis

Claims (7)

[Claims] 1. A switch device in which an on / off operation is performed by changing a position of an operation member and switching a contact point, wherein a movable lock member that locks the operation member at an on position; A switch device comprising: a driving unit for selectively moving between a locked position and an unlocked position; and a control unit for controlling the driving unit. 2. The switch device according to claim 1, wherein said drive means comprises a solenoid whose drive shaft is connected to said lock member, and said control means controls the operation of said solenoid. 3. The power on / off operation by the on / off operation.
The switch device according to claim 1, wherein the switching is performed. 4. A movable lock member for locking the operation member to an ON position in a switch device that is turned on and off by changing a position of the operation member and switching a contact point, and locking the lock member. An image forming apparatus, comprising: a driving unit for selectively moving between a position and an unlocked position; and a control unit for controlling the driving unit. 5. The driving means comprises a solenoid whose drive shaft is connected to the lock member, and the control means controls the operation of the solenoid and the operation of the image forming apparatus. The image forming apparatus according to claim 4, wherein 6. The switch device according to claim 4, wherein the power supply of the image forming apparatus is turned on / off by turning on / off the switch device. 7. The image forming apparatus according to claim 4, wherein said control means causes said lock member to perform locking for a predetermined time.