JPH0228528Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a corona charger used in a copying machine to charge a photoreceptor and remove static electricity during transfer, and in particular, it is devised so that the corona charger can be easily attached and removed from the copying machine body. At the same time, the present invention aims to provide an improved corona charger which can be manufactured easily by reducing the number of component parts and which can contribute to cost reduction.

Conventionally, this type of corona charger has been constructed as shown in FIGS. 1 to 3.

That is, Fig. 1 is a plan view of the corona charger, Fig. 2 is a front view, and Fig. 3 is a sectional view taken at the center of Fig. 1. In these figures, 1 has a U-shaped cross section. A long and thin charge box, 2 and 3 are charge line holders disposed at both ends of the charge box 1, and 4 is a charge line holder whose both ends are attached to the charge line holders 2 and 3, respectively. This is a charge line stretched in the longitudinal direction inside box 1.

The charge line holders 2 and 3 are box-shaped holders 2A made of insulating material with an open top surface;
3A and insulating lids 2B, 3B that close the upper openings of the holders 2A, 3A, and the end of the charge line 4 is fixed in the box-shaped holders 2A, 3A. Openings 2C and 3C through which the charge line 4 is led out are formed in 3A. Further, a handle 5 for attaching and detaching the charger box 1 is formed integrally with one holder 2, and a terminal 6 is provided on the other holder 3 side.

7 is attached to the outer bottom wall of the charger box 1,
A square-shaped metal guide piece 8 is provided with a predetermined length along its longitudinal direction, and 8 is a metal guide piece into which the guide piece 7 attached to a predetermined position on the copying machine main body side is inserted. The guide piece receiving frame 9 is a plate spring member provided on the side of the guide piece receiving frame 8, and urges the guide piece 7 upward to stabilize the engagement between the guide piece 7 and the guide piece receiving frame 8. It is something.

Therefore, in the case of a corona charger having such a structure, it is necessary to hold the handle 5 and hold the charger box 1.
By pulling out the guide piece 7, the guide piece 7 is guided by the guide piece receiving frame 8, and this box 1 slides forward. By inserting and sliding the box 1, the box 1 can be installed at a predetermined position on the equipment.

However, the structure of such a removable corona charger has particularly the following problems.

Since both the guide piece 7 and the guide receiving frame 8 are made of metal, their sliding movement generates a loud metallic noise when the charger box is attached or detached, causing significant discomfort and the sliding operation. It was difficult to expect smooth movement of the boxes due to the occasional stiffness.

The sliding mechanism of the charger box has a large number of components, making it expensive.

The present invention provides a corona charger that solves the above problems, and one embodiment of the present invention will be described with reference to FIGS. 4 to 6.

4 is a front view, FIG. 5 is a schematic cross-sectional view taken at the center of FIG. 4, and FIG. 6 is a perspective view specifically showing the main components.

1 is a charger box made of stainless steel or the like and has a U-shaped cross section; 2 and 3 are charge line holders disposed at both ends of the charger box 1; and 4 is the charge line holder. 2 and 3, respectively, and is a charge line stretched in the longitudinal direction inside the charge box 1.

In particular, as is clearly seen in FIG. 6, the charge line holders 2 and 3 are box-shaped holders 2A and 3A made of insulating resin with an open top surface;
A lid 2 made of insulating resin that closes the top opening of A
It is composed of B and 3B.

One of the charge line holders 2 has an opening 2C through which the charge line 4 is inserted, and the charge line 4 is attached to a shaft 2D provided in the holder 2A via a tension spring 4A.

It also has a handle 5 integrally with the holder 2A for attaching and detaching the charger box 1, and is molded integrally with the holder 2A on the bottom wall of the holder 2A, as shown in FIG. 1
A pair of guide pieces 2E are formed to protrude. This guide piece 2E is inserted into a guide piece receiving frame 8 attached to a predetermined position on the main body of the copying machine.

Therefore, when the holder 2A is installed at a predetermined position in the charger box 1, the portion of the box 1 corresponding to the guide piece 2E is opened so that the guide piece 2E protrudes downward from the box 1. It is 1A.

The other charge line holder 3 also has an opening 3C through which the charge line 4 is inserted.
A terminal (banana plug) 6 is installed at a predetermined location within A and electrically connected to the charge line 4. Moreover, like the holder 2A above, the holder 3 as shown in the figure
A pair of guide pieces 3E are formed integrally with the bottom wall of box A to protrude therefrom, and a portion of box 1 corresponding to guide pieces 3E is provided with an opening 1B.

Further, as is clearly seen in FIGS. 4 and 5, leaf spring members 9, 9 are attached to the bottom wall of the charger box 1 to stabilize the engagement between the guide pieces 2E, 3E and the guide receiving frame 8. is doing.

In the corona charger of the present invention having such a configuration, when pulling out the charger box 1 by holding the handle 5 or installing it in a predetermined position, a resin guide portion integrated with the holders 2A and 3A is used. Since the pieces 2E and 3E are guided by the guide piece receiving frame 8 and slide, no noise is generated during attachment and detachment, and the flexibility of the resin also works to eliminate snags during sliding, making it smooth. We can expect box movement.

When the corona charger is installed, the insulating holder is positioned directly on the guide member on the copier main body side without going through a charger box, etc., since the guide member is integrally formed, so that the photoconductor and the above-mentioned insulator are directly positioned. It is possible to improve the positioning accuracy with respect to the charger wire held in the holder, and the effect of uniformly charging the photoreceptor can be expected.

In addition, by simply attaching each insulated holder that holds the charge wire to the charger box, there is no need to separately attach a guide member.
Significant cost reductions can be achieved by reducing manufacturing and assembly processes by reducing the number of assembled components.

[Brief explanation of the drawing]

1 to 3 show a conventional corona charger, in which FIG. 1 is a plan view, FIG. 2 is a front view, and FIG. 3 is a sectional view. 4 to 6 show the corona charger of the present invention, in which FIG. 4 is a front view, FIG. 5 is a sectional view, and FIG. 6 is a perspective view showing the main structure. 1: Charger box, 2 and 3: Charge line holder, 4: Charge line, 2E and 3E: Guide piece, 8: Guide receiving frame.

Claims (1)

[Claims for Utility Model Registration] A conductive charger box, separate insulating holders provided at both ends of the charger box, and a stretched state between the insulating holders at both ends. a charger line held in
A corona charger consisting of a corona charger, in which a guide piece provided on the corona charger itself is slidably guided by a guide means provided on the copying machine main body side, and the corona charger can be attached to and detached from the copying machine main body. In the insulating holder that holds the charge line, a guide piece is integrally formed as a guide piece that is slidably guided with respect to the guide means on the copying machine main body side. Corona charger.