JPH0716948U - Electrophotographic device - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a mechanism capable of simultaneously cleaning the charger wire and the cover glass of the scanner unit, and when the cleaning means is in the image forming position, it is known. By tightening
Prevent abnormal operation. [Structure] Attaching a rotatable support member to the device body,
The charging wire and the cleaning member for the cover glass are integrally attached to this support member, the upper cover of the apparatus main body is opened, and then the support member is moved in parallel along the axial direction of the photosensitive drum for cleaning. The support member informs that the upper cover is not completely closed and is in an abnormal state when it is not retracted to the proper position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electrophotographic apparatus, and more particularly to a mechanism capable of simultaneously cleaning a wire of a charger and a scanner unit.

[0002]

[Prior art]

 Conventionally, the discharge wire of a corona charger used in an electrophotographic apparatus is contaminated with toner and the like depending on the usage condition, and as a result, it affects charging, so the wire should be cleaned regularly or as needed. Desired. An example of the cleaning mechanism is shown in FIG.

FIG. 2 is Japanese Patent Laid-Open No. 1-107282. A cleaning guide hole for cleaning a corona generating wire is provided on a shield plate along the corona generating wire, and cleaning is performed along the guide hole. By moving the material in parallel, the cleaning is speeded up.

[0004]

[Problems to be solved by the device]

 However, in the case of such a mechanism, if the cleaning tool stops in the image area, abnormal discharge occurs, which causes a defective image. Further, in the case of an electrophotographic apparatus, a scanner unit, which is an exposing means, is arranged close to a corona wire, and a transparent member such as glass is covered by a transparent member such as glass in the exposing portion of the scanner unit facing the photosensitive member. -It is provided as a member. Then, the scattered toner adheres to the inside of the electrophotographic apparatus on this glass portion as well, which hinders the exposure and thus requires cleaning. Therefore, in the conventional electrophotographic apparatus, a cleaning means is provided for each of the charging section and the exposing section, or the apparatus is opened to clean each place inside the apparatus.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and an object thereof is to provide a mechanism for simultaneously cleaning the wire cleaning of the charger and the cover glass of the scanner unit with a simple structure.

[0006]

[Means for Solving the Problems]

 According to the present invention, the cleaning member for the scanner unit cover glass and the cleaning member for the charger wire are attached to the supporting member which is supported by the main body of the device and is movable in parallel with the longitudinal direction of the photoconductor shaft. When released, the support member rotates, both cleaning members come into contact with the cover glass and the wire, and the support members move horizontally to enable cleaning by the cleaning member and the upper cover. When the cover is closed, the support member is rotated by the upper cover, and the cleaning member provided on the support member is separated from the cover glass and the wire.

A micro switch is attached to the main body of the apparatus, and the micro switch is turned on / off by closing / opening the upper cover. When the supporting member is in the cleaning position, the upper cover is closed to detect an abnormal state. It is characterized by being configured as possible.

[0008]

[Action]

 According to such a technical means, the cleaning can be performed by the supporting member having the cleaning member integrated therein, and the parallel movement of the supporting member enables simultaneous cleaning of the charger and the cover glass. Further, by closing the upper cover, the cleaning member provided on the support member retracts to a position separated from the portion to be cleaned, so that there is no problem in image formation.

Further, if the support member is not in the non-cleaning position and the upper cover is closed, it is possible to inform that the micro switch of the apparatus body is not in contact with the upper cover and is in an abnormal state.

[0010]

Embodiment An embodiment of the present invention will be exemplarily described below with reference to the drawings. FIG. 1 shows a main configuration of a laser printer according to an embodiment of the present invention.

Reference numeral 1 is a photoconductor drum, 2 is a charger for charging the photoconductor drum 1, 2 a is a charging wire for the charger 2, and is a rear opening of a shield case 2 b of the charger 2. A first cleaning member 3 that contacts the wire 2a is provided. A scanner unit 4 is attached to the apparatus main body 5 above the photosensitive drum 1. Since the scanner unit 4 is a laser printer in this embodiment, it includes a polygon motor, a lens, and a mirror, and irradiates the photosensitive drum 1 with laser light 4a. Reference numeral 4b denotes a cover glass of the scanner unit 4, which is a portion for emitting the laser beam 4a from the unit 4, and a second cleaning member 6 is provided so as to be able to contact the cover glass 4b.

The first and second cleaning members 3 and 6 are attached to and integrated with the support member 7. The support member 7 is rotatably attached to the apparatus main body 5 by a shaft portion 8 and is movable in parallel in the longitudinal direction of the photoconductor drum 1. By this parallel movement, the cleaning members 3 and 6 are moved in parallel and the wire 2a The glass 4b can be cleaned.

A coil spring is wound around the shaft portion 8 of the support member 7 and is biased in a counterclockwise direction. When the upper cover 9 of the apparatus body 5 is opened, the wire 2a and the glass 4b are cleaned. The contact between the members 3 and 6 facilitates cleaning. Further, the supporting member 7 can be moved to a position in the apparatus main body 5 that does not interfere with image formation when not cleaning. When the support member 7 is not retracted to this position and the upper cover 9 is closed, the upper cover 9 and the tip 7a of the support member 7 come into contact with each other so that the upper cover 9 cannot be closed. . Reference numeral 10 denotes a micro switch attached to the main body 5 of the apparatus, and a switch for detecting that the upper cover 9 is closed. It is possible to inform the device body that it is not operating and is in an abnormal state.

In FIG. 1, the solid line portion of the support member 7 shows a state in which the upper cover 9 is opened and is in a cleaning possible position, and the dotted line portion shows that the upper cover 9 is closed and the support member 7 is not. The state is shown in the cleaning position.

Next, the cleaning operation in this embodiment will be described. During a normal image forming operation, the support member 7 resists the biasing force of the spring, and the upper cover 9 is in contact with the tip 7a of the support member 7. When performing cleaning, the upper cover 9 is opened from the apparatus main body 5. At this time, the support member 7 is rotated counterclockwise by the urging force of the spring, and the cleaning members 3 and 6 attached to the support member 7 reach the position where they can contact the wire 2 a and the cover glass 4 b. Then, by manually moving the supporting member 7 in parallel with the longitudinal direction of the photosensitive drum 1, the cleaning members 3 and 6 can clean the wire 2a and the cover glass 4b. After cleaning, when the support member 7 is retracted to the non-image forming position and then the upper cover 9 is closed, the micro switch 10 attached to the apparatus main body 5 is turned on. However, when the support member 7 is not in the normal retracted position, the tip 7a of the support member 7 abuts the upper cover 9 and is not completely closed, and the micro switch 10 remains off, which indicates an abnormal state. Notify.

[0016]

[Effect of device]

 As described above, according to the present invention, it is possible to simultaneously clean the cover glass of the scanner unit and the charger wire with a simple structure. Further, according to the present invention, when the support member integrated with the cleaning member is in the non-cleaning position, the upper cover of the main body of the apparatus cannot be closed, and therefore it can be detected by a micro switch etc. It has a remarkable effect that the user can be informed that the operation is being performed.

[Brief description of drawings]

FIG. 1 is an explanatory view of a main part of a laser printer according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a wire cleaning mechanism of a charger according to a conventional technique.

[Explanation of symbols]

 1 photoconductor drum 2a charger wire 3 cleaning member 4b cover glass 6 cleaning member 7 support member 9 upper cover

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location G03G 21/00 520 2107-2H

Claims (2)

[Scope of utility model registration request] 1. A cleaning member for a scanner unit cover glass and a cleaning member for a charger wire are attached to a supporting member which is axially supported by the main body of the apparatus and is movable in parallel in the longitudinal direction of the photosensitive member. When released, the support member rotates to bring both the cleaning members into contact with the cover glass and the wire, and by moving the support members in parallel, cleaning by the cleaning member becomes possible, and the upper cover is An electrophotographic apparatus, wherein the supporting member is rotated by the upper cover when closed, and the cleaning member provided on the supporting member is separated from the cover glass and the wire. 2. A micro switch is attached to the main body of the apparatus, the micro switch is turned on / off by closing / opening the upper cover, and when the supporting member is in a cleaning position, the upper cover can be detected as an abnormal state. An electrophotographic apparatus having the above-mentioned configuration.