JPS63202765A - Power cutoff/supply method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] This is a system that cuts off/supplies power in conjunction with the opening/closing operation of an opening/closing part, and when the opening/closing part is opened, the power is supplied to a mechanical part having a rotating mechanism, a high pressure generation mechanism, etc. To ensure the safety of the operator by cutting off the power supply, and to solve the possibility of malfunction due to inrush current when the power supply is started when the power is closed, the load is divided when the power supply is supplied. By configuring it to start, it is possible to reduce the inrush current value and prevent malfunctions caused by the inrush current.

[Industrial application field]

The present invention relates to a power cutoff/supply method that supplies/cut off power in conjunction with the opening/closing operation of an opening/closing section.

Generally, various electronic devices are covered with an exterior cover, and are configured to prevent foreign matter from entering from the outside or accidents caused by operators coming into contact with the various electronic devices.

In particular, when opening the exterior cover of an electronic device that has a rotating mechanism or a high voltage generation mechanism, for example, in order to ensure the safety of the operator, it is necessary to take measures such as cutting off the power supply when the exterior cover is opened.

For example, if a jam occurs in a laser printer during printing, the operator must open the outer cover and remove the jammed paper.

At this time, if the motor and laser of the laser printer are in operation, there is a risk of injury to the operator. To prevent this, when the exterior cover is opened, the power supply to the laser printer including the motor and laser is cut off.

Further, a method is generally adopted in which power is supplied to the laser printer when the exterior cover is closed while all loads are connected.

In such a case, a system is required that can smoothly and reliably perform power cutoff/supply processing without affecting other devices.

[Conventional technology]

FIG. 4 shows a block diagram illustrating a conventional example.

FIG. 4 shows an outline of the configuration of an electronic device having a rotation mechanism and a high voltage generation mechanism, and its configuration consists of a switch ( For example, a microswitch) 1, a power supply unit 2 that supplies power (for example, DC 5V, 24V, etc.) to an internal functional block 3.4, and a mechanism unit 4, which controls the operation of the mechanism unit 4 and controls the mechanism depending on the state of the switch l. A control section 3 having a function of also controlling the power supply to the section 4, a mechanism section 4 equipped with a rotation mechanism, a high pressure generation mechanism, etc., and a housing (a) in which each of the functional blocks 2 to 4 is housed. The exterior cover 5 is included.

The switch 1 is provided to detect when the exterior cover 5 is opened or closed.

FIG. 4(A) shows a system in which the state of the switch 1 is monitored by the control section 3, the open/closed state of the exterior cover 5 is recognized based on the state of the switch 1, and the on/off of the power supplied to the mechanism section 4 is controlled. It is.

Further, FIG. 4(B) shows a method of controlling the on/off of the power supplied from the power supply unit 2 to the mechanism unit 4 via the switch 1 which is turned on/off in conjunction with the opening and closing of the exterior cover 5. .

[Problem that the invention seeks to solve]

In the example shown in FIG. 4(A) above, for example, switch 1
If the contacts are short-circuited and malfunctioning, or the control section 3 is malfunctioning because the control signal to the power supply section 2 is on, etc.
Even if the exterior cover 5 is opened, power may continue to be supplied to the mechanism section 4, and in this case, safety for the operator is not necessarily guaranteed.

Also in the example of FIG. 4(B), if the contacts of the switch 1 are short-circuited and have failed, power continues to be supplied to the mechanism section 4 in the same way.

Further, even if the switch 1 operates normally, when the exterior cover 5 is closed, power is supplied at once to the mechanical section 4 which is under a high load via the switch 1.

For example, in the case of an electrophotographic printer, a current of about 10 amperes flows.

Therefore, an inrush current that exceeds a predetermined standard momentarily flows, and the internal functional blocks 2 to 4 may malfunction due to the influence of the inrush current.

(Means for solving problems) FIG. 1 shows a block diagram illustrating the invention in detail.

The principle block diagram of the present invention shown in FIG. 1 is a path for supplying power from the power source 2 to the power source section 2 and the mechanism section 40 explained in FIG. A connector 10 to be inserted and removed, a control unit 30 including a mechanical control unit 31 serving as a removal detection means for detecting removal and removal of the connector 10, a mechanism that rotates at a predetermined voltage, and a mechanism that is driven at a predetermined high voltage. and a mechanism section 40 that includes a high-voltage power supply section 43 that has a mechanism for generating a predetermined high voltage.

[Effect]

The load on the mechanism section 40 when power is supplied is divided into the mechanical mechanism section 41, the high voltage power supply section 43 having a high voltage generation mechanism, and other mechanical sections, and the load on the mechanical mechanism section 40 is divided between the mechanical mechanism section 41, the high voltage power supply section 43 having a high voltage generation mechanism, and other mechanical sections. 41 and the high-voltage power supply unit 43 are turned on at different times.

In addition, the control unit 30 includes an opening/closing detection means for detecting opening/closing of the connector 10 that can be connected to and removed from the outer cover in conjunction with the outer cover.
By configuring the internal power control unit 31 to turn on power to the internal power mechanism unit 41 and the high-voltage power supply unit 43 using a detection signal from the opening/closing detection means when the exterior cover is closed, inrush current can be reduced. This value has been significantly reduced to prevent malfunctions caused by inrush current, and to reduce the number of connectors that can be inserted and removed.
Since it is via O, it is possible to ensure the supply/cutoff of power.

Note that power is always supplied to the mechanical parts other than the mechanical mechanism part 41 and the high voltage power supply part 43, regardless of whether the opening/closing part is opened or closed.

〔Example〕

The gist of the present invention will be specifically explained below with reference to embodiments shown in FIGS. 1 to 3.

FIG. 2 is a block diagram illustrating the present invention in detail, and FIG. 3 is a diagram illustrating the configuration of a connector in an embodiment of the present invention. Note that the same reference numerals indicate the same objects throughout the figures.

This embodiment takes as an example an electrophotographic printer using a thermal fixing device (not shown), and in this embodiment, the mechanism section 40 includes a rotating mechanism, a mechanism driven by high voltage, For example, a mechanical mechanism section 41 that includes a spindle motor, a main motor (for the conveyance system), and a laser emitting mechanism, a printer mechanism section 42 that constitutes other mechanical parts of the printer, a pre-charger, a developing bias, a transfer charger, and an AC. It includes a separation unit (for separating the paper from the photosensitive drum after transfer), and a high-voltage power supply section 43 that is disconnected and connected by the connector 10 and generates a high voltage from the power supply.

The mechanical mechanism section 41 and the high voltage power supply section 43 are provided with electronic switches 41a and 43a that turn on/off the power input from the power supply section 2 under control from the mechanical control section 31.

In this embodiment, if the power is turned on when the exterior cover 5 is opened, the mechanical mechanism section 41 (for example, in the case of an electrophotographic printer, a current load of about 7 amperes) may pose a hazard to the operator. ) and high voltage power supply section 43
The power supply system is divided into the printer mechanism section 42 (which has a current load of about 2 A) and other mechanical parts (for example, in the case of an electrophotographic printer, it has a current load of about 2 A). It is configured as follows.

That is, the printer mechanism section 42 and the control section 30 are supplied with power E3sE4 regardless of whether the exterior cover 5 is opened or closed, and the power supplies E,, E! The system is divided into a mechanical mechanism section 41 and a high-voltage power supply section 43 to which power is supplied/cut off.

Supplying power to this mechanical mechanism section 41 and high voltage power supply section 43/
The shutoff is controlled by the power control unit 31 in the control unit 30, and the power supply E+ and Ex are supplied by the exterior cover 5.
It is turned on and off by the connector 10 that is inserted and removed by opening and closing.

The various processing operations of the printer are controlled by the printer control unit 32 in the control unit 30, and the power E supplied to this unit is connected to the power supply unit 2 regardless of whether the exterior cover 5 is opened or closed, as described above. Controlled by turning on/off.

FIG. 2 shows a power supply EllE input through the connector 10,
A mechanical control section 31, a mechanical mechanism section 41, and a high-voltage power supply section 43 that control on/off of the power source are illustrated.

As shown in FIG. 3, the connector 10 of the present embodiment is configured such that its joint portion can be inserted and removed (in other words, the connector a side and b side are inserted and removed) by a link mechanism (in a link mechanism) interlocking with the exterior cover 5. This state is detected by the opening/closing detection section 31b in the mechanical control section 31.

That is, one side (a side) of the connector 10 is the link mechanism (b)
It is mechanically coupled to the exterior cover 5 via the casing 5, and the other side (b side) is fixed to the casing (a) of the electronic device.

When the exterior cover 5 is opened, the a side and b side of the connector 10
On the other hand, the link applies a pull-out force and pulls out.

As shown in FIG. 2, the internal control unit 31 in the control unit 30 includes an inverter 31a that passes 5 V of DC to detect whether the connector 10 is connected or disconnected, and whether the connector 10 is connected or disconnected depending on the presence or absence of voltage from the inverter 31a. an inverter 31c that passes the detection signal from the open/close detector 31b, and an inverter 31c that monitors the state of the open/close detector 31b and turns on/off the detection signal when the connector 10 is detected to be disconnected or inserted. It includes an MPU 31d and a resistor R for controlling off.

Note that the opening/closing detection section 31b in the mechanical control section 31 is connected to the connector 1.
0 is changed from the disconnected state to the connected state, and sends this detection signal to the electronic switches 41a and 43a in the mechanical mechanism section 41 and the high voltage power supply section 43 via the inverter 31c.

The control section 30 controls the mechanical mechanism section 41. according to the output of the opening/closing detection section 31b. Electronic switch 4 in the order of high voltage power supply section 43
1a and 43a are turned on and power is supplied from the power supply section 2.

In particular, in the high-voltage power supply section 43, the order of configuration (not shown) is as follows: pre-charger, developing bias, transfer charger, and AC separation.
Power is supplied sequentially.

In this embodiment described above, the inside of the mechanism section 40 is divided into a system that turns on/off the power supply in conjunction with the insertion and removal of the connector 10, and a system that supplies power regardless of whether the connector 10 is inserted or removed. .

Furthermore, in a system that turns on/off the power supplies E+ and Ex in conjunction with the insertion and removal of the connector 10 between the a side and the b side, the power supplies E+ and Et are sequentially turned on after detecting the insertion and removal state of the connector 10. It is controlled so that it is turned on.

As a result, the power E+ supplied via the connector 10
, the inrush current that occurs when Ez is on is significantly reduced, ensuring safety when the exterior cover 5 is opened and preventing malfunctions of the internal functional blocks 30, 40, etc. when the exterior cover 5 is closed. becomes.

Further, the thermal fixing device (not shown) of the printer described above requires a predetermined time to reach a predetermined temperature. Therefore, even if the power is turned on sequentially as described above, the time it takes for the printer to become operational will not be extended.

〔Effect of the invention〕

According to the present invention as described above, when the exterior cover is opened, the power is reliably cut off to areas that are dangerous to the operator, and when the exterior cover is closed, the inrush current value when the power is turned on is automatically cut off. This has the effect of significantly reducing the amount of power required to reliably prevent malfunctions caused by inrush current.

[Brief explanation of the drawing]

FIG. 1 is a block diagram explaining the present invention in detail, FIG. 2 is a block diagram explaining the present invention in detail, FIG. 3 is a diagram explaining the configuration of a connector in an embodiment of the present invention, and FIG. is a block diagram explaining a conventional example, and in the figure, l is a switch, 2 is a power supply section, 3.30 is a control section, 4.40 is a mechanism section, 5 is an exterior cover,
10 is a connector, 31 is a mechanical control unit, '
31a and 31c are inverters, 31b is an opening/closing detection unit (detection means), 31d is an MPU, 32 is a printer control unit, 41 is a mechanical mechanism unit, 41a and 43a are electronic switches, 42 is a printer mechanism unit, and O! Block diagram of Umei's urine WK word 1a month hA 1
Goods

Claims (1)

[Claims] A power supply unit (2) that supplies electric power, a mechanical mechanism unit (41) that includes a mechanism that operates with a first voltage and a mechanism that is driven with a second voltage, and a mechanical mechanism unit (41) that includes a mechanism that operates with a first voltage and a mechanism that drives with a second voltage. a voltage generating section (43) that generates; the mechanical mechanism section (41);
A means (10) provided in the power supply path to the voltage generating section (43) and connected to, disconnected from, and connected to the opening/closing section of the device.
), a detection means (31) for detecting that the means (10) changes from a disconnected state to a connected state, and a control section (30) that operates by power from the power supply section (2).
), and the control section (30) controls the mechanical mechanism section (41) and the voltage generation section (43) according to the output of the detection means (31).
) is supplied with power from the power supply section (2).