JPS62196680A - High voltage power supplying device - Google Patents

Abstract

PURPOSE:To prevent the generation of noise and electric shock by providing the titled device with a power supply unit connecting an output terminal at its one end and a paper carrying unit provided with an electrostatic charger having an input terminal on one end and to be vibrated. CONSTITUTION:At the time of normal copy for vibrating the paper carrying unit 3 on an operatable position, the high voltage output terminal 10 of the power supply unit 9 is connected to the input terminal 11 of the charger 2 through a coil spring 12, so that the output voltage of the unit 9 is impressed to the charger 2. Since the output terminal 10 is connected to the input terminal 11 through the spring 12, a power supply defect due to the error of upper and lower positions between the terminals 10, 11 is not generated. Since the terminals 10, 11 are separated under the down state of the unit 3, the output voltage of the unit 9 is not applied to the charger 2. Consequently, the generation of noise and electric chock can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a high-voltage power supply device for a charger in an electrostatic transfer copying machine or the like.

BACKGROUND OF THE INVENTION In recent years, copying machines have come to use a variety of sensors for various automation purposes, and it has become necessary to minimize noise inside and outside the machine.

An example of a conventional high-voltage power supply device that is a source of noise will be described below with reference to the drawings.

FIG. 4 is a block diagram of a conventional copying machine, and FIG. 5 shows a method of supplying high voltage power from a conventional high voltage power supply device to a charger. In FIG. 4, 1 is a photoreceptor, 2 is a charger, 3 is a paper transport unit, 4 is a paper feed set, and 6 is an axis of the paper transport unit. In FIG. 5, 6 is a power supply unit, and 7 is a high-voltage electric wire.

The paper fed from the paper cassette 4 is transported to the paper transport unit 3.
The structure is such that it moves up and down around the shaft 5 of the paper transport unit so that it can be easily removed when paper jams occur on the paper transport unit. A charger 2 is attached to the paper transport unit 3, and is wired to a power supply unit 6 via a high-voltage electric wire 7.

Note that 8 indicates a main body board.

The operation of the high-voltage power supply device configured as described above will be explained.

First, since the paper conveying unit 3 is moved up and down each time a paper jam occurs as described above, the high voltage electric wire 7 wired there also moves accordingly. In order to minimize stress on the high-voltage electric wire 7, it had to be fixed close to the shaft 6 of the paper transport unit. As a result, the wiring was as long as an elbow.

Problems to be Solved by the Invention However, the above configuration has two problems. One is that the high-voltage wires are long, and the noise generated from them can cause equipment to malfunction. Therefore, noise prevention measures were required.

Second, even when the paper transport unit is lowered, the output of the high-voltage power supply device remains connected to the charger. Therefore, there is a risk of electric shock due to malfunction, etc., and countermeasures are required.

In view of the above-mentioned problems, the present invention provides a high-voltage power supply device that solves the above-mentioned problems by supplying voltage from the high-voltage power supply device to the charger without going through high-voltage wires.

Means for Solving the Problems In order to solve the above problems, the high voltage power supply device of the present invention has the following features:
A power supply unit fixed to a main body board and provided with an output terminal at one end, and a swingable paper transport unit equipped with a charger having an input terminal at one end, the paper transport unit being moved to an operable position. The charger has a configuration in which the input terminal of the charger comes into contact with the output terminal of the power supply unit when the charger swings.

Effects The present invention has the above-described configuration, so that the output of the power supply unit can be connected to the charger serving as the load over the shortest distance.
At the same time, if the charger is lowered to clear a paper jam or the like, the charger will be disconnected from the output of the power supply unit.

Embodiment Hereinafter, a high-voltage power supply device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the vicinity of the paper conveyance unit inside the main body of the copying machine according to the present invention, during normal copying.
In other words, Fig. 2 is a perspective view with the paper transport unit raised, a sectional view showing the positional relationship between the charger and power supply unit in Fig. 1, and Fig. 3 is a perspective view with the paper transport unit lowered. FIG. Note that the same components as in the conventional example are given the same reference numerals.

In FIGS. 1 to 3, reference numeral 9 denotes a power supply unit that is fitted and fixed to the main body board 8, and an output terminal 1o connected to a power supply is provided at one end of the interior. This output terminal 1o
is formed of an elastic conductive metal such as a spring, and is provided corresponding to the lower opening of the power supply unit 9. 11 is an input terminal provided at one end of the charger 2, and 12 is a conductive coil spring. The coil spring 12 may be attached to the input terminal 11 or the output terminal 1o. Further, the output terminal 10 can be easily extended to contact the input terminal 11, and is not limited thereto.

In the present invention, during normal copying when the paper conveyance unit is swung to the operable position as shown in FIG. 2 is applied with the output voltage of the power supply unit 9. At this time, as shown in FIG. 2, since the high-voltage output terminal 1o and the charger 2 are connected via the coil spring 12, a power supply failure due to an error in the vertical position between the terminals does not occur.

Furthermore, when the paper transport unit 3 is lowered as shown in FIG. This prevents electric shock.

Effects of the Invention As detailed above, according to the present invention, the charger and the high-voltage power supply unit provided in the paper conveying unit that can swing toward and away from the photoconductor are connected by vertical swinging of the charger. Since the terminals are connected and separated, wiring of high-voltage electric wires is not required, and the configuration can be simplified. At the same time, since there is no wiring and the terminals are in direct contact, noise can be prevented from occurring. Furthermore, when the paper conveyance unit is lowered to clear a paper jam, the charger is separated from the power supply unit and the high voltage supply is cut off, thereby preventing electric shock.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the main parts of a high-voltage power supply device in an embodiment of the present invention, FIG. 2 is a sectional view of the same, and FIG. 3 is a perspective view of the main parts when the paper conveyance unit is swung downward. FIG. 4 is a schematic configuration diagram of a conventional copying machine, and FIG. 5 is a perspective view of essential parts of a conventional high-voltage power supply device. 2...Charger, 3...Paper transport unit, 8...Main board, 9...Power supply unit, 1o...Output terminal , 11... Input terminal, 12... Coil spring. Name of agent: Patent attorney Toshio Nakao and 1 other person2-
-One charge view 1st figure 3-Kinko general delivery-unit 8 one body base plate q-'rt warm unit Z 10--Ichiro force @ child figure 3 figure 4 figure 5

Claims (2)

[Claims] (1) A power supply unit fixed to the main body board and provided with an output terminal at one end, and a swingable paper transport unit equipped with a charger having an input terminal at one end, and operates the paper transport unit. A high-voltage power supply device characterized in that, when the charger swings to a possible position, an input terminal of the charger comes into contact with an output terminal of the power supply unit. (2) The high-voltage power supply device according to claim 1, wherein the output terminal of the power supply unit is an elastic member.