JPH0519592A - Destaticizing and electrifying device - Google Patents

Abstract

PURPOSE:To integrally form a grid, a holding part, a connecting part, and a positioning part, to attain reduction in the number of parts, to simplify the assembling of the parts, to make positioning easy, to attain reduction in cost, and further to improve the reliability of an operation by extending a part of the grid of an electrifying charger, for using it as the holding part, using a spring member for the holding part, providing a positioning part on a part of the grid, and further, extending a part of the grid, for using it as an electrical part. CONSTITUTION:In this destaticizing/electrifying device provided with an electrifying body 25 arranged so as to be near to a latent image carrier 24, attached to a frame body 20A so as to hold a casing 26 supporting the grid 31, and electrifying a charge on the image carrier 24, and a destaticizing body attached to the frame body 20A so as to hold a destaticizing part, and removing the charge remaining on the latent image carrier 24, the grid 31 is constituted so as to have the holding part 31a holding the casing 26 by extending a part of the grid 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a destaticizing device, for example,
The present invention relates to a destaticizing device for destaticizing residual charges on the surface of a photoconductor and charging the charges in an electrostatic recording device, an electrophotographic copying device and the like.

[0002]

2. Description of the Related Art As a conventional decharging device, for example, there is one shown in FIG. A decharging device 1 shown in FIG. 3 is applied to the electrostatic recording device 2, and includes a charging charger 3 for charging a charge and a discharging lamp 4 for discharging a residual charge.
Are attached to the apparatus main body 2A as separate bodies. The charging charger 3 is provided in the vicinity of the photoconductor belt 6 that is wound around the three rolls 5 so that the opening is on the photoconductor belt 6 side. The casing 7 has a U-shaped cross section.
A charging wire 8 stretched in the center of the casing 7 in parallel with the photosensitive belt 6 and orthogonal to the moving direction of the photosensitive belt 6, and a mesh-like shape supported by the opening 7a of the casing 7. The grid 9 and the frame-shaped holding member 10 that holds the casing 7 and attaches it to the main body 2A are separately provided. The grid 9 is electrically connected to the varistor unit 11 by a connection cable 12. The grid 9 of the charging charger 3 is the photosensitive belt 6
The casing 7 so that it is at a predetermined distance from the surface 6a of the
The side end portion 7a of the photoconductor belt 6 is pressed by the spring 14 toward the photoconductor belt 6 side, and is brought into pressure contact with the positioning reference member 13 fixed to the placement main body 2A for positioning.

The static elimination lamp 4 is separately attached to the main assembly 2A by the holding member 15 so as to be located on the upstream side in the moving direction of the photosensitive belt 6 with respect to the charging charger 3.
As in the case of the charging charger 3, the case 4A of the static elimination lamp 4 is fixed to the positioning member by a spring or the like so that the distance between the opening side of the static elimination portion 16 of the static elimination lamp 4 and the surface 6a of the photoconductor belt 6 becomes a predetermined distance. Positioning is performed by pressing the photosensitive belt 6 side.

[0004]

However, in such a conventional decharging device, the holding member 10 and the connecting cable 12 are separate from the grid 9, and the holding member 10 and the connecting cable 12 are different from each other. It was managed as a single part. Further, a spring for pressing the casing 7 or the case 4A toward the photoconductor belt 6 is required, the number of parts is large, the management is troublesome, and the assembling work of these is troublesome.

Therefore, the present invention has been made in view of such a conventional problem, and a part of the grid of the charging charger is extended and used as a holding portion, and the holding portion is used as a spring member, and further, the grid is used. By extending a part of and using it as an electrical connection part, the grid, the holding part,
By integrally forming the connecting portion and the positioning portion, the number of parts can be reduced, the parts can be easily assembled, the positioning can be facilitated, the cost can be reduced, and the operation reliability can be improved. An object is to provide a destaticizing device.

[0006]

According to a first aspect of the present invention, a latent image carrier is disposed in the vicinity of the latent image carrier and holds a casing for supporting a grid and is attached to a housing to charge the latent image carrier. In the destaticizing device, the destaticizing device comprises: a charging member for holding the discharging portion; and a discharging member attached to the housing for removing the residual charge on the latent image carrier, wherein the grid extends a part of the grid and a casing. Claim 2 is characterized in that it is provided with a holding section, and in Claim 2, the holding section of the grid is formed of a spring member in the decharging apparatus according to Claim 1, and Claim 3 is characterized in that The destaticizing device according to claim 1 or 2, wherein the grid has a positioning portion on the latent image carrier side of the grid, and claim 4 is the destaticizing device according to claim 1, 2 or 3, The grid is A part of the grid is extended to have a connecting portion for electrically connecting the grid and the varistor, and claim 5 is the destaticizing device according to claim 1, 2, 3 or 4. The holding portion of the charge removing portion has a charge removing holding portion that holds the charge removing portion, and claim 6 is the charge removing device according to claim 1, 2, 3, 4 or 5, wherein the charge removing portion is the charge removing portion. Is characterized by having a positioning portion on the latent image carrier side.

[0007]

According to the first aspect of the present invention, since the grid has the holding portion that extends a part of the grid, the holding portion and the grid are integrally formed. In the second aspect, since the holding portion of the grid is the spring member, the casing supporting the grid is biased toward the latent image carrier by the spring member of the holding portion.

In the third aspect, since the grid has the positioning portion, the relative position between the grid and the latent image carrier is directly determined by the positioning portion of the grid. In the fourth aspect, since the grid has the connecting portion obtained by extending a part of the grid, the grid and the varistor are directly electrically connected by the connecting portion. In the fifth aspect, since the holding portion of the grid has the static elimination holding portion, the static elimination portion is held by the static elimination holding portion of the holding portion of the grid.

According to the sixth aspect of the present invention, since the static elimination portion has the positioning portion, the position of the static elimination portion directly determines the position of the static elimination portion.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are views showing an embodiment of a destaticizing device according to claims 1 to 6 of the present invention, and are views showing the main parts applied to a copying machine. First, the configuration will be described. In FIG. 1, reference numeral 21 is a decharging device, and the decharging device 21 is arranged in the vicinity of a photoconductor belt 24, which is a latent image carrier wound around three rolls 23 in the copying machine 20. . The roll 23A is a drive roll. Reference numeral 25 denotes a charging charger which is a charging body. The charging charger 25 is long and has a U-shaped cross section and has an opening 26a.
And a casing 26 having an opening 26 of the casing 26.
It is arranged close to the photoconductor belt 24 with a being the photoconductor belt 24 side. At the center of the cross section of the casing 26, a charger wire 27 is stretched in parallel with the surface 24a of the photosensitive belt 24 and in a direction orthogonal to the moving direction of the photosensitive belt 24.

The opening 26a of the casing 26 is made of a stainless plate member and has a mesh-like grid having a large number of pores.
31 is provided. A part of the grid 31 extends through the top plate portion 26b of the casing 26 on the side opposite to the opening 26a of the casing 26, and further extends along the outer surface portion of the top plate portion 26b. A holding portion 31 a that is partially fixed to the casing 26 holds the casing 26. Holding part 31a
Is composed of a spring member 31c and is bent into a V shape to bend the end portion 31
b is attached to the apparatus main body 20A which is a housing, and the casing 26 is biased and fixed to the photosensitive belt 24 side.

The grid 31 is a photosensitive belt 24 of the grid 31.
The device main body 20 has a projection 31d that is a protruding positioning portion on the side and is biased by a holding portion 31a that is a spring member 31c.
The grid is brought into contact with the positioning reference member 34 fixed to A.
The position of 31 is determined, and the distance between the photosensitive belt 24 and the grid 31 in the opening 26a of the casing 26 can be set to a predetermined value.

Reference numeral 35 is a varistor, and the butter 35 is attached to the main body 20A of the apparatus through the end portion 31b of the holding portion 31a. The grid 31 has a connecting portion 31e which extends a part of the grid 31 and electrically connects the grid 31 and the varistor 35, and is provided also as the above-mentioned holding portion 31a in this embodiment. Reference numeral 36 denotes a charge eliminating lamp which is a charge eliminating portion. The charge eliminating lamp 36 is arranged on the upstream side in the moving direction of the photoconductor belt 24 with respect to the charger 25, and removes the residual charge on the charger 25. The holding portion 31a of the grid 31 is a casing 26.
A static elimination holding portion 31f for holding the static elimination lamp 36 is provided upstream of the fixed portion of the top plate portion 26b in the moving direction of the photoconductor belt 24.

The static elimination lamp 36 is provided with a protrusion 37 as a positioning portion for positioning on the side of the static elimination lamp 36 on the photoconductor belt 24 side. The projection 37 determines the relative position between the photoconductor belt 24 and the static elimination lamp 36. It is designed to be able to. Next, the operation will be described. In the present invention, a part of the grid 31 is extended, this part is fixed to the casing 26,
Since the casing 26 is held and attached to the apparatus main body 20A, the conventional separate grid 9 and holding member 10 are provided.
And are integrally formed, the number of parts is reduced, the number of parts management and assembly is reduced, and the cost can be reduced.

Further, a projection 31d as a positioning portion is formed on the side of the grid 31 on the photosensitive belt 24, and a holding portion 31a is composed of a plate-shaped spring member 31c. The casing 26 is biased toward the photosensitive belt 24 side. Therefore, as shown in FIG. 1, the positioning of the grid 31 does not require a spring for urging the holding member toward the photosensitive belt 24 as in the conventional case, and the projection 31d
The position of the grid 31 with respect to the photosensitive belt 24 is determined only by contacting the positioning reference member 34 with the urging force of the holding portion 31a, the number of parts is reduced, and the cost can be reduced.

Further, the holding portion 31a includes a grid 31 and a varistor.
Since it also serves as the connection portion 31e for electrically connecting with 35,
It is not necessary to attach a separate connection cable and manage parts as in the conventional case, and the terminal portion 31b of the holding portion 31a is fixed to the apparatus main body 20A, and the varistor 35 is attached to the terminal portion 31b so that the grid can be formed. 31 and the varistor 35 are electrically connected. Therefore, the mounting operation can be simplified, the number of parts is reduced, the parts management is unnecessary, the reliability of the connection is increased, and the cost can be reduced.

Further, since the holding portion 31a of the grid 31 holds the static elimination lamp 36 in the static elimination holding portion 31f, a separate holding member dedicated to the static elimination lamp 36 is unnecessary, the number of parts is reduced, and the assembling is easy. Can reduce costs. Further, a projection as a positioning portion is provided on the side of the static elimination lamp 36 on the photosensitive belt 24 side.
As shown in FIG. 2, the protrusion 37 is urged toward the photoconductor belt 24 by the holding portion 31a of the spring member and brought into contact with the positioning reference member 40, so that the static elimination lamp 36 and the photosensitizer lamp 37 are provided. The relative position with the body belt 24 can be determined,
Positioning can be done quickly and easily.

[0018]

As described above, according to the first aspect of the present invention.
According to the invention, a part of the grid of the charging charger is extended and used as a holding part, and according to claim 2, the holding part is a spring member, and according to claim 3, positioning is performed on a part of the grid. Further, according to claim 4, a part of the grid is extended and used as an electrical connection part to integrally form the grid, the holding part, the connection part and the positioning part, respectively. The number of parts can be reduced, parts can be easily assembled, positioning can be done easily, and
The cost can be reduced, and the operation reliability can be improved.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional schematic front view showing an embodiment of a decharging device according to claims 1 to 6 of the present invention.

FIG. 2 is a partial cross-sectional schematic front view showing a part of the operation of the decharging device shown in FIG.

FIG. 3 is a partial cross-sectional schematic front view showing a conventional decharging device.

[Explanation of symbols]

20A device body (housing) 21 Antistatic device 24 Photoconductor belt (latent image carrier) 25 Charger (charged body) 26 casing 31 grid 31a holding part 31b Terminal part 31c Spring member 31d protrusion (positioning part) 31e Connection part 31f Static elimination holding part 36 Static elimination lamp (static elimination part) 37 Protrusion (positioning part)

Claims (6)

[Claims] 1. A charging body, which is arranged in the vicinity of a latent image carrier and holds a casing for supporting a grid, is attached to the housing and charges the latent image carrier with an electric charge; A static eliminator attached to the electrostatic latent image carrier for removing residual charges on the latent image carrier, wherein the grid has a holding portion for extending a part of the grid and holding a casing. Destaticizing device. 2. The destaticizing device according to claim 1, wherein the holding portion of the grid is made of a spring member. 3. The destaticizing device according to claim 1, wherein the grid has a positioning portion on the latent image carrier side of the grid. 4. The destaticizing device according to claim 1, wherein the grid has a connecting portion which extends a part of the grid and electrically connects the grid and the varistor. 5. The holding portion of the grid has a charge-removal holding portion that holds the charge-removing portion.
The decharger according to 2, 3, or 4. 6. The static eliminator has a positioning portion on the latent image carrier side of the static eliminator 1, 2.
The decharger according to 3, 4, or 5.