JPH04329554A - Plain paper recorder - Google Patents

Abstract

PURPOSE:To prevent shorting by preventing an AC harness from being damaged by the opening/closing actions of an opening/closing housing when an AC high voltage harness is connected to the opening/closing housing having a fixing unit from a main body side power source, and to prevent the AC harness from being watched and touched when the opening/closing housing is opened, and a failure in the contact of a contact point by a high voltage output spring and a metallic plate is eliminated. CONSTITUTION:In this plain paper recorder having the opening/closing housing which has the fixing unit and can be opened, and closed, a through hole is provided on the center of the pin of a bracket with a fulcrum pin 16 supporting the opening/closing housing so as to rotate it to a main body side, and a constitution that the AC high voltage harness driving a fixing heater 15 passes through the through hole so as to connect to the main body side power source 18.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a plain paper recording device, and more specifically, it can be applied to plain paper facsimiles, printers, copiers, etc., and is applicable to plain paper facsimiles, printers, copying machines, etc. The present invention relates to a plain paper recording device having a high-voltage power pack on the opening/closing housing side.

0002

2. Description of the Related Art In a conventional plain paper recording device, when passing an AC harness from the power supply on the main body side to an opening/closing housing having a fixing unit, the harness is passed from near a fulcrum pin to the opening/closing housing.
The harness can be seen by opening and closing the opening/closing housing, and the AC
Since the harness would be touched, it was protected with an insulating tube.

[0003] In addition, high-pressure devices (charger,
In other conventional plain paper recording devices that have a power pack (developing bias), the high-voltage connection to the charger and developing unit on the main body side is made by a spring and a metal plate. A metal plate was provided on the side and came into contact with the opening/closing casing when it was closed against the main body.

0004

[Problems to be Solved by the Invention] However, it is difficult to connect the AC power supply from the main body side power supply to the opening/closing housing having the above-mentioned fixing unit.
In conventional plain paper recording devices that pass a high-voltage harness, the harness is passed from near the fulcrum pin to the opening/closing housing, so the AC harness is easily rubbed and damaged by the opening/closing operation of the opening/closing housing.
There was a problem that there was a risk of short circuit.

[0005] Furthermore, when the opening/closing case is opened, the AC harness can be seen or touched, which poses a safety problem. Next, in the conventional plain paper recording device having the high-pressure power pack on the opening/closing housing side described above, when connecting to the main body side charger unit and developing unit,
When the opening/closing casing is closed, the spring and the metal plate come into contact and are electrically connected, so if, for example, the spring bends or the position of the main body and the opening/closing casing shifts,
There was a problem in that poor contact between the high-pressure output spring and the metal plate was likely to occur.

[0006] Therefore, in the present invention, when an AC high voltage harness is passed from the main body side power supply to the open/close housing having the fixing unit,
The AC harness can be prevented from being damaged and shorted by the opening/closing operation of the opening/closing housing, and the AC harness can be prevented from being seen or touched when the opening/closing housing is opened, improving safety. Another object of the present invention is to provide a plain paper recording device which can eliminate poor contact between a high-voltage output spring and a metal plate when a high-voltage power pack is provided on the opening/closing housing side.

[0007]

[Means for Solving the Problems] In order to achieve the above object, a plain paper recording device according to the present invention has a fixing unit and an openable and closable housing, in which the openable and closable housing can be rotated toward the main body. A through hole is provided in the center of the supporting bracket with a fulcrum pin, and an AC high voltage harness for driving the fixing heater is passed through the through hole and connected to the power source on the main body side.

In order to achieve the above object, the plain paper recording device according to the present invention has a power pack on the opening/closing housing side that has a transfer charger, a high voltage output of a charging charger, and a developing bias voltage output, and an output harness. Either the transfer/charging charger and the developing bias, or all of them, can be inserted into the charging/transfer unit or the developing bias on the main body by passing them through the through hole of the fulcrum pin of the bracket with a fulcrum pin that rotatably supports the opening/closing casing on the main body side. It is configured to be connected to a developing unit.

[0009]

[Operation] According to the present invention, as shown in FIG. Since the AC harness is connected to the AC harness, it is possible to open and close the opening/closing case, and the AC harness can be prevented from being rubbed and damaged. Furthermore, even when the opening/closing housing is opened, the AC harness can be completely prevented from being exposed.

In addition, in the present invention, in the case of a plain paper recording device having a power pack 16 (charger high voltage output, developing bias output) in an open/close housing as shown in FIG. 3, a high voltage output harness 17 is installed as in the case shown in FIG. Since the harness 16 was passed through the fulcrum pin through hole and brought out to the main body side and electrically connected to the charging charger and developing unit on the main body side, the high voltage output of the charging/transfer charger and developing bias was provided on the opening/closing side. It is possible to connect to the charger unit or the developing unit without causing contact failure during electrical connection due to contact between the spring and the metal plate provided on the main body side.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on the drawings. FIG. 1 is a schematic diagram showing the configuration of a plain paper recording apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an electrostatic charger, and the photoreceptor 2 is charged with this electrostatic charger 1.
A latent image is formed by the laser beam 3. Next, toner is attached to the developing unit 4, and the recording paper 9 is sent along a paper passing path 8 by a paper feed roller 6 and a registration roller 7 in a transfer charger 5. The toner is then transferred onto the recording paper 9 that has been fed along the paper passing path 8. Then, the image is thermally fixed by the fixing roller 10 and discharged by the discharge roller 11. At this time, as shown in FIG. 2, the opening/closing casing 12 having the fixing unit can be opened and closed with respect to the main body 13 around the fulcrum 11, so that jam removal and the like can be performed.

As described above, in this embodiment, as shown in FIG. 2, the harness of the AC heater 15 provided in the fixing roller 14 is passed through the through hole of the fulcrum pin of the fulcrum bracket 16 and brought out to the main body side. Since the AC harness is connected to the power source 18 on the main body side, the opening/closing case can be opened and closed, and the AC harness can be prevented from being rubbed and damaged. Therefore, it is possible to prevent short circuits, and also to prevent the AC high voltage harness from being exposed at all even when the opening/closing housing is opened, so it is aesthetically pleasing and there is no need to touch the AC high voltage harness. Therefore, safety can also be ensured.

Next, in the present invention, in the case of a plain paper recording device having a power pack 19 (charger high voltage output, developing bias output) in an open/close housing as shown in FIG.
Similarly to the case shown in FIG. 1, the high-voltage output harness 20 is passed through the fulcrum pin through hole, and the harness 20 is brought out to the main body side, and is electrically connected to the charging charger and the developing unit on the main body side.

[0014] Therefore, it is necessary to prevent contact failure when electrically connecting due to contact between the spring provided on the opening/closing side of the charging/transfer charger and the high voltage output of the developing bias and the metal plate provided on the main body side. It can be connected to a charger unit or developing unit. Moreover, at this time, it is possible to prevent the high voltage output harness from being damaged by opening and closing the opening/closing casing, as in the above embodiment shown in FIG.

Next, in the present invention, a 5V harness such as a paper ejection sensor attached to the fixing unit in the opening/closing housing and a thermistor (see FIG. 3) for detecting the temperature of the fixing roller is connected to a high voltage as shown in FIG. Like the output harness and AC harness, it may be passed through the through hole of the fulcrum pin, and only the 5V harness may be separated by a grounded metal partition plate.

[0016] In this case, the 5V harness from the sensor etc. provided on the opening/closing housing side can be prevented from being damaged by opening/closing the opening/closing housing provided as in the embodiment shown in FIG. A passing through the same place
It is possible to prevent noise from the C harness and the high voltage output harness from propagating to the 5V signal and causing false detection.

[0017]

According to the present invention, when an AC high-voltage harness is passed from the power source on the main body side to an opening/closing housing having a fixing unit, the AC harness is prevented from being damaged by the opening/closing operation of the opening/closing housing to prevent short circuit. This has the effect of improving safety by preventing the AC harness from being seen or touched when the opening/closing casing is opened, and when the opening/closing casing has a high-voltage power pack on the side. This has the effect of eliminating poor contact between the high-voltage output spring and the metal plate.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the configuration of a plain paper recording device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing the structure of an open/close housing having a fixing unit according to the first embodiment of the present invention.

FIG. 3 is a schematic diagram showing the structure of an opening/closing housing having a power pack according to a second embodiment of the present invention.

FIG. 4 is a diagram illustrating a plain paper recording device applicable to the present invention.

Claims (3)

[Claims] 1. A plain paper recording device having an openable/closeable housing having a fixing unit, wherein a through hole is provided in the center of a pin of a bracket with a fulcrum pin that rotatably supports the openable/closeable housing on the main body side, and a fixing heater is provided. A plain paper recording device characterized in that a driving AC high-voltage harness is passed through the through hole and connected to a power source on the main body side. 2. In a plain paper recording device having a power pack on the opening/closing housing side that has a high voltage output of a transfer charger and a charging charger and a bias voltage output for development, in the output harness, a power pack for the transfer/charging charger and the developing bias voltage is provided. A feature is that any or all of the opening/closing casings are connected to the charging/transfer unit or the developing unit on the main body side by passing through the through hole of the fulcrum pin of a bracket with a fulcrum pin that rotatably supports the main body side. Plain paper recording device. [Claim 3] Fixing sheet discharge sensor and thermistor 5
A V system output harness is passed through the same fulcrum pin through hole as the AC high voltage harness, and the fulcrum pin through hole is partitioned into two by a grounded metal plate to separate the 5V system harness and the AC high voltage harness, respectively. 3. The plain paper recording apparatus according to claim 1, wherein the plain paper recording apparatus is configured to allow the plain paper to pass through the paper.