JP2002365924A - Device with destaticization and charging means - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a destaticizing and charging device, by which a member such as a destaticizing needle and a ground wire can easily be connected with each other from the rear side. SOLUTION: In the destaticizing and charging device, having a holding member for inserting a conductive needle-like or linear member for arraying and fixing it or a conductive thin-plate member and a conductive connection member to be connected with the holding member or the thin-plate member, the conductive connection member is connected with a device ground and at least one of the holding member or the thin-plate member and the conductive connection member is provided with a guide means, having an introducing shape capable of inserting the other, a pressurizing means for pressurizing the other and a fixing means for holding the other in a connected state with respect to pressure- weld the holding member or the thin-plate member and the conductive connection member to be electrically conductive.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a charge removing / charging device used for an image forming apparatus or the like.

[0002]

2. Description of the Related Art Conventionally, it is mounted on an apparatus for handling paper film such as an image forming apparatus of a printer, a facsimile or a copying machine, and is used to reduce and remove static electricity charged on the surface of the paper or film. As a static eliminator, for example, a self-discharge type static elimination brush is known.

[0003] This type of static elimination brush generally has a structure in which a large number of brush materials such as conductive fibers are held by a conductive member such as a metal plate. Connection processing with the device body (for example,
Grounding). For this reason, the following processing is usually performed.

[0004] 1. In the case where the device is formed of a metal frame, a conductive member is attached to the surface of the frame metal by being stopped.

[0005] 2. If the device is surrounded by an insulator such as a plastic molded housing, etc. ・ A metal nut is integrally molded or driven into a predetermined location of the housing, and the nut is connected to the device ground terminal before screwing the static elimination brush. . Alternatively, a separately prepared ground wire is screwed at the same time when the static elimination brush is mounted.

[0006] An earthing tool such as a bundled wire is sandwiched between conductive holding members sandwiching the conductive brush, and the tip is attached to an earthing portion such as an apparatus earthing wire frame.

[0007]

However, in the prior art, a method of directly attaching the device to a metal grounding portion of a metal frame, that is, a method of simply attaching a static elimination brush with screws and grounding through a frame has recently been used in printers, In an OA device such as a facsimile machine or a copying machine, a member such as a frame of the apparatus is almost a molded part made of plastic and is an insulator. Therefore, some kind of grounding is required as described below.

That is, a metal nut is integrally molded (or later integrated) into a predetermined portion of a plastic housing, and the nut and an apparatus ground terminal are connected to each other, and then a static elimination brush is screwed, or the like. When the static elimination brush is mounted, measures are taken such as screwing a separately prepared ground wire at the same time.

In other words, there is a need for a pre-treatment of preparing a fixed portion by integral molding in advance, which requires a large amount of work, and has a trouble of separately procuring a ground wire, a connecting wire, and the like.
In addition, there is a problem in that connection and installation are complicated, require human labor, and increase the cost.

[0010] If the grounding tool is attached to the static elimination brush,
Although the connection between the brush itself and the grounding tool is lost, the grounding wire and grounding plate must be attached (routed) to the grounding part of the equipment frame, making it extremely difficult to wire the complicated equipment. It was accompanied.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a static elimination / charge applying apparatus which can easily connect a member such as a static elimination needle to a ground wire even afterwards. To provide.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a holding member or a conductive thin plate-like member holding and fixing an electrically conductive needle-like or linear member therebetween. Or in a static elimination / charge applying device having a conductive connecting member connected to a thin plate member, the conductive connecting member is connected to a device ground, and at least one of the holding member or the thin plate member and the conductive connecting member A guiding means having an introduction shape for allowing the other to be inserted, a pressurizing means for applying pressure to the other, and a fixing means for holding the other in a joined state, provided with a holding member or a thin plate member and a conductive connecting member And are brought into electrical conduction by press-fitting.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

<First Embodiment> FIG. 1 is a sectional view of an electrophotographic image forming apparatus according to a first embodiment. The electrophotographic image forming apparatus forms an image on a recording bias using an electrophotographic image forming process by an image forming unit.

In FIG. 1, a document 1 to be copied is placed on a platen glass 2 provided on the upper surface of an upper main body frame 9 in order to set the document 1 at a predetermined position. Pressed.

When the copying operation is started, the light source 3 illuminating the original 1 is turned on, and the light source 3 moves in the direction of arrow a to irradiate the original 1.

The original image reflected by the original 1 is reflected by a mirror 4a moving together with the light source 3, and further reflected by a pair of return mirrors 4b moving in the circumferential direction at half the speed of the mirror 4a. Reflection mirror 4 fixed through 5
The light is guided to the photosensitive drum 6 in the group c. That is, image light corresponding to the image information is applied to the photosensitive drum 6.

The lens 5 placed in the mirror group 4 moves to a preset magnification position, and enlarges or reduces the image of the copy original with the mirror group 4 to form an image on the photosensitive drum 6.

The photosensitive drum 6 is rotated in the direction of the arrow shown in the figure, and is uniformly charged in advance by the primary charging section 6a. A latent image is formed on the photosensitive drum 6 by exposure to the image light, and the latent image is developed. The transfer charging section 1
After being transferred to a recording medium (for example, transfer paper) by 2,
The residual toner remaining on the photosensitive drum 6 is
Is removed.

The photosensitive drum 6, the primary charging section 6a, the developing section 7, and the cleaning section 8 serving as image forming means are integrally formed as a cartridge, and are formed as a process cartridge B which can be attached to and detached from the upper main body frame 9 of the image forming apparatus. It is configured. Here, the developing unit 7 has a developing roller 7a, and the developing roller 7a rotates to supply the toner stored in the toner storing unit 7b to the photosensitive drum 6.

The cleaning section 8 has an elastic cleaning blade 8a. The two blades 8a are in contact with the photosensitive drum 6, and remove the toner remaining on the photosensitive drum 6.

The process cartridge is a unit in which a charging unit, a developing unit or a cleaning unit and an electrophotographic photosensitive member are integrally formed into a cartridge, and this cartridge is made detachable from an electrophotographic image forming apparatus main body. is there. Further, at least one of the charging means, the developing means, and the cleaning means and the electrophotographic photosensitive member are integrally formed into a cartridge so that the cartridge can be attached to and detached from the electrophotographic image forming apparatus main body.

Further, at least the developing means and the electrophotographic photosensitive member are integrally formed into a cartridge so as to be detachable from the main body of the electrophotographic image forming apparatus.

Here, reference numeral 31 denotes a static elimination needle provided near the transfer charger 12, which is a voltage having the same potential as the photosensitive drum 6 (to prevent the transfer paper from winding around the photosensitive drum 6). The reverse voltage is applied to weaken the electrostatic attraction force between the photosensitive drum 6 and the transfer paper to facilitate the separation of the transfer paper from the photosensitive drum 6.

Numeral 32 denotes a static elimination brush, which reduces the charge by flowing the static electricity remaining on the discharged transfer paper to the ground of the apparatus main body, and prevents the transfer papers from adhering to each other due to the charge. This is to improve the paper stackability on the paper discharge tray.

FIGS. 2 and 3 are detailed views of the static elimination needle 31 and the static elimination brush 32 of the image forming apparatus shown in FIG.

In the drawing, reference numeral 41 denotes a base portion of the static elimination needle 31, and reference numeral 46 denotes an end of the static elimination needle 31 which is made of a conductive metal plate or the like. Reference numeral 42 denotes a contact fixing member attached to the end of the static elimination needle 31.
A flat portion 43 and a concave portion 44 are formed at the central portion of 5a and 45b.

On the other hand, reference numeral 50 denotes a conductive connecting member, which is also made of a conductive metal sheet metal, and connects the bundled wires 51 connected to the apparatus ground in bent shapes 49a, 49b, 49c. It is fixed. Reference numeral 48 denotes a positioning hole shape, and reference numeral 47 denotes an introduction shape formed at an end portion (a chamfer is formed at a corner to facilitate insertion).

When the introduction shape 47 of the conductive connecting member 50 is inserted between one end 46 of the bail portion 41 of the static elimination needle 31 and the flat portion 43 of the contact fixing member 42, the member is formed on the same member. The position of the positioning hole 48 is fixed by entering into a concave portion formed in the member on the static elimination needle 31 side (however, a convex shape is formed on the surface on the insertion side). At this time, the conductive connecting member 5
0 exists between the end surface 46 of the static elimination needle member and the flat portion 43 of the contact fixing member 42, and the curl shape 4 of the contact fixing member 42
At 5a and 45b, the pressure contact state is established, the contact pressure is secured, and electrical conduction is established.

The contact fixing member 42 is not limited to a conductive metal member but may be a synthetic resin or the like.
Even if it is provided on the 0 side, the same effect as described above can be obtained, and of course, conduction of the charge removal brush 32 can be ensured by implementing these configurations.

<Second Embodiment> Next, a second embodiment of the present invention will be described.

FIG. 4 shows the shape of the joint between the static elimination needle 73 and the conductive connecting member 72. Notch shapes 61 and 63, which are guiding shapes, and a tip introduction shape 65 are provided at the end of the static elimination needle base 41. A hole 64 and a stopper shape 62 are formed, and a positioning convex shape 66 is formed at one end of one conductive connecting member 72.
a, 66b, an introduction slope 67, and an arm portion 68 are formed. Both are conductive members (for example,
Metal sheet).

Here, when the conductive connecting member 72 is inserted into the end of the static elimination needle 73, the positioning notch 61, 63 is provided with a positioning convex shape, and the positioning is performed by the stopper shape 62. 68 and its base parts 69, 7
The electrical connection can be obtained by the insertion shape 65 being sandwiched between 0 and pressed and fixed. 51
Is a bundle connected to the apparatus ground, and is a conductive connecting member 72.
However, as described above, the sheet metal of the member may be fixed by bending.

FIG. 5 shows the second embodiment.
Is a brush material made of conductive fiber or the like, and 83 is a brush material 8
An adhesive tape or an adhesive for fixing the arrangement of the 1s,
Reference numeral 80 denotes a holding member for holding the brush material 81, which is made of a conductive member (for example, an aluminum plate) and is bent so as to hold the brush material 81. Reference numeral 87 denotes a conductive connection member (connection to the device ground is not shown) and is connected to the device ground member.

Here, the distal end portion 84 is inserted between the bent holding members 80, the position is determined by the holes 82 and the convex portions 85, and a predetermined contact pressure is secured at the arm 86 to establish conduction.

The holding member 80 may be a conductive member such as a synthetic resin. In this case, the same effect can be obtained even if the leading end portion 83 is a conductive sheet member. It is possible to maintain the same conduction state.

<Embodiment 3> Next, an embodiment of the present invention will be described with reference to FIG.

FIG. 6 is a view showing a third embodiment, in which an introduction slope 91, positioning grooves 92a and 92b, and a pressing arm 93 are provided at one end of a conductive base material of a static elimination needle or a static elimination brush.
The conductive state similar to the above can also be obtained by forming a conductor portion between the grooves 92a and 92b and removing the covering of the bundle 51 from the device ground.

In each of the above-described embodiments, conduction between the static elimination needle or the static elimination brush and the conductive connecting member can be obtained without using a special tangential member.

[0040]

As is clear from the above description, according to the present invention, a holding member or a conductive thin plate-like member and a holding member for sandwiching and fixing a conductive needle-like or linear member are arranged. Or in a static elimination / charge application device having a conductive connection member connected to a thin plate member, the conductive connection member is connected to a device ground, and at least one of the holding member or the thin plate member and the conductive connection member A guiding means having an introduction shape allowing the other to be inserted, a pressurizing means for applying pressure to the other, and a fixing means for holding the other in a joined state, wherein the holding member or the thin plate-shaped member and the conductive connecting member are provided. Are brought into the electrically conductive state by press-fitting with each other, so that an effect that the member such as the static elimination needle and the ground wire can be easily connected even afterwards.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an image forming apparatus including a charge removing / charge applying device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a static elimination needle (static elimination brush) according to Embodiment 1 of the present invention.

FIG. 3 is a cross-sectional view showing a connected state of a static elimination needle (a static elimination brush) according to Embodiment 1 of the present invention.

FIG. 4 is a perspective view of a static elimination needle (static elimination brush) according to Embodiment 2 of the present invention.

FIG. 5 is a perspective view of a static elimination needle (static elimination brush) according to Embodiment 2 of the present invention.

FIG. 6 is a perspective view of a static elimination needle (static elimination brush) according to Embodiment 3 of the present invention.

[Explanation of symbols]

 31 static elimination needle 32 static elimination brush 42 contact fixing member 44 positioning concave shape 72 conductive connection member 73 static elimination needle

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H033 AA14 BA10 BA13 2H200 FA06 HA13 HA18 HB03 HB06 HB20 HB45 HB46 KA02 KA06 KA25 MA01 MA02 MB01 3F101 AA02 AA04 AA13 LA02 LA05 LA07 LB03

Claims (2)

[Claims] 1. A static eliminator comprising a holding member or a conductive thin plate member for sandwiching and fixing a conductive needle or linear member and a conductive connecting member connected to the holding member or the thin plate member. In the charge applying device, the conductive connecting member is connected to the device ground, and the guiding means and the other have an introduction shape that allows the other to be inserted into at least one of the holding member or the thin plate-shaped member and the conductive connecting member. And a fixing means for holding the other in a joined state. The holding member or the thin plate-shaped member and the conductive connection member are pressed and engaged to make an electrically conductive state. A static eliminator / charger. 2. A guiding means having an introduction shape that allows at least one of one end of the holding member or the thin plate-like member and one end of the conductive connecting member to be inserted into the other. Pressurizing means for applying pressure to the other,
2. The device according to claim 1, wherein solid means for holding one and the other in a joined state is formed integrally and continuously.