JPH0675974B2 - Printer device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a printer device that transfers an image onto a fed sheet, and more specifically, a laser beam of a laser printer or the like is reflected by a reflection plate to be exposed. The present invention relates to a printer device having a structure that leads to the body.

[Conventional technology]

In recent years, the number of office equipment owned is increasing due to the spread of office equipment such as computers, and it is becoming more difficult to secure the installation place as the number of office equipment owned increases. For example, in an office,
Computers and their peripherals are often installed on a desk together with their peripherals, and if the computer and its peripherals occupy a large space, it will hinder other work on and around the desk. Therefore, such office equipment is inevitably required to be downsized.

A printer device is often used as a peripheral device such as a computer and a word processor that has been widely used as office equipment, and as the printer device, an electrostatic copying device such as a laser printer or an LED printer is known.

For example, in a conventional laser printer, as in a general copying machine, a paper feed tray is detachably provided with its rear end portion protruding from the machine body. Then, an image is printed on the paper supplied from the paper feed tray with a developer, the image transferred onto the paper is fixed by a fixing device, and then discharged to a paper discharge unit such as a face-down tray. It has become so.

Further, in the above laser printer, in order to reduce the size of the machine frame, when it is difficult to arrange the semiconductor laser unit so that the laser beam can be directly irradiated to the photoconductor, a mirror such as a mirror is provided in the machine frame. After a reflecting member is provided to reflect the laser beam, the photoconductor is irradiated with the laser beam.

[Problems to be Solved by the Invention]

However, in the above-mentioned conventional structure, since the reflecting member for reflecting the laser beam is attached to the apparatus main body, the number of parts is increased, the structure is complicated, and the cost is increased. .

Further, since the rear end of the paper feed cassette projects from the machine frame, there is an inconvenience that the installation area of the laser printer inevitably increases.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the printer device according to the present invention is provided with a paper ejection unit for accommodating the image-transferred paper in the machine frame, and a paper feed for accommodating the paper on the back side of the paper ejection unit. The trays are arranged, and a paper conveyance path is formed from the paper feed side of the paper feed tray to the paper ejection section through the back side of the paper feed tray. The paper conveyance path is provided with a photosensitive member for forming a latent image. And a fixing device for fixing the visible image on the paper on which the visible image formed by developing the latent image on the photoconductor is transferred, and the laser generating means for irradiating the laser light is a paper feed tray. The sheet feeding tray is provided with a reflecting member which is provided on the back side of the sheet and reflects the laser light generated from the laser generating means to guide it to the photoconductor.

[Work]

According to the above configuration, since the paper feed cassette is provided with the reflection member for reflecting the laser light, it is not necessary to provide at least a support member for mounting the reflection member in the machine frame. Therefore, it is possible to reduce the number of parts and simplify the internal structure.

In addition, a paper feed cassette is arranged below the paper discharge unit, and a paper transport path connecting the paper feed side of the paper feed cassette and the paper discharge unit is formed so as to reach the paper discharge unit via the back side of the paper feed tray. Since the photoconductor, the fixing device, and the like are arranged along the paper transport path, the paper feed cassette does not protrude from the machine frame, and the storage density in the machine frame is increased, so that the printer The size of the device can be reduced.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

As shown in FIG. 1, in the printer device of this embodiment, a machine frame 26 has a substantially triangular cross-sectional shape, and a manual sheet feeding section 21 having a sheet feeding roller 20 is provided on the top thereof. ing.
A face-down tray 19, which is a paper ejection unit for accommodating the paper ejected after printing, is provided below the manual paper feeding unit 21 along the slope of the machine frame 26. The face-down tray 19 is rotatably mounted on the upper end thereof. A face-down tray 19 is provided on the lower side wall of the face-down tray 19 to store the above-mentioned sheets.

On the back side of the face-down tray 19, a paper feed cassette 1 for holding paper is attached. The paper feed cassette 1 is arranged with an inclination angle substantially the same as that of the face-down tray 19. The sheet feeding cassette 1 has a rotating plate 1a for pushing out a sheet in the direction of the below-mentioned invoking roller. A call-in roller 5 for sending out a sheet is arranged on the paper feed cassette 1, and a paper feed roller 6 is arranged in the paper feed direction of the paper feed cassette 1. A guide wall member 2 forming a part of one side of the paper transport path 25 at the lower end of the paper feed cassette 1.
The guide wall member 2 is provided at its lower end with a roller 4 which is one of a pair of discharge rollers.

Further, a mirror 3 as a reflecting member described later is attached to the outside of the bottom wall of the sheet feeding cassette 1, and a semiconductor laser device 12 which is a laser generating means indicated by a chain double-dashed line is provided on the side of the sheet feeding cassette 1. Has been. The laser light emitted from the semiconductor laser device 12 is reflected by the mirror 3 and is emitted onto the photosensitive drum 10 provided below.

A paper transport path 25 is formed from the paper feed side on which the paper feed roller 6 is disposed in the paper feed cassette 1 and the manual insertion paper feed section 21 to the face-down paper inlet 19a of the face-down tray 19. There is. In the paper transport path 25, in the direction from the paper feed cassette 1 to the face-down tray 19, the paper transported from the paper feed rollers 6 and 20 is transported to the photoconductor drum 10, and the transport rollers 7, 8 and 9 described above. The photoconductor drum 10 of is arranged. Around the photosensitive drum 10, a main charger 11, which charges the photosensitive drum 10,
A developing device 13 that develops the electrostatic latent image formed on the surface of the photoconductor drum 10 by exposure, a transfer charger 14 that transfers the toner image on the surface of the photoconductor drum 10 to a sheet, and the surface of the photoconductor drum 10 after transfer. A cleaning device 15 for removing the toner adhering to is sequentially provided.

Therefore, in the present laser printer, the face down tray 19, the paper feed cassette 1, and the developing process unit centering on the photosensitive drum 10 are arranged in parallel.

Furthermore, in the paper conveyance direction with respect to the photoconductor drum 10,
A pair of upper and lower heat rollers which are fixing devices for heating and fixing the toner image transferred from the photosensitive drum 10 onto the paper.
16, a roller 17 that constitutes a pair of discharge rollers together with the roller 4 of the paper feed cassette 1 with the above-mentioned paper feed cassette 1 mounted, and a paper sheet by similarly facing the guide wall member 2 of the paper feed cassette 1 at a fixed interval. A transport path changing member 23 forming a part of the transport path 25 and a discharge roller 18 are arranged in this order.

Further, the discharge roller 18 is arranged at the face-down paper inlet 19a of the face-down tray 19.

In the above configuration, the photosensitive drum is used during the printing operation.
The surface of 10 is charged when the main charger 11 is opposed as the photosensitive drum 10 rotates. Next, the laser light, which is indicated by the alternate long and short dash line in the drawing, emitted from the semiconductor laser device 12 is reflected by the mirror 3 and is applied to the surface of the photosensitive drum 10. Then, only the exposed portion of the surface of the photoconductor drum 10 is discharged to form an electrostatic latent image. This electrostatic latent image is developed by the adhesion of toner when it faces the developing device 13.

On the other hand, the paper is sent from the manual insertion paper feed unit 21 to the paper transport path 25 by the transport roller 20 or from the paper feed cassette 1 to the paper transport path 25 by the call-in roller 5 and the paper feed roller 6, and then the transport roller. It is conveyed to the photosensitive drum 10 by 7/8/9. Then, the toner image formed on the photoconductor drum 10 is transferred onto the sheet by the transfer charger 14, and the transferred toner image is heated and fixed by the heat roller 16.
After that, the sheet is discharged to the face-down tray 19 from the face-down sheet inlet 19a through the discharge port 22 or the discharge roller 10 by the rollers 4 and 17 and the transport path changing member 23.

The toner remaining on the photoconductor drum 10 after the toner image is transferred is removed by the cleaning device 15 to prepare for the next printing.

Here, when replenishing toner to the developing device 13 or processing such as paper jam during operation of the photosensitive drum 10, the paper feed cassette 1 is pulled out. At this time, first, the face-down tray 19 is rotated in the direction of arrow A to open it, and the paper feeding cassette 1 is rotated around the point B to be taken out. At this time, the mirror 3 is also taken out together with the paper feed cassette 1, while the laser light emitted from the semiconductor laser device 12 is guided to the surface of the photosensitive drum 10 when the paper feed cassette 1 is mounted. The mirror 3 is located at.

Further, when the paper is supplied to the paper feed cassette 1, the face down tray 19 is opened as described above.

As described above, in this device, the semiconductor laser device
Mirror 3 for reflecting the laser light emitted from 12
Is provided in the paper feed cassette 1, a structure for attaching the mirror 3 to the machine frame 26 is unnecessary, the structure inside the machine frame 26 is simplified, and the number of parts is reduced.

Further, since the paper feed cassette 1 is housed inside and the paper feed path 25 is formed through the back side of the paper feed cassette 1, the paper feed cassette 1 does not project to the outside and the machine frame 26
The internal storage density is increased, and the printer device has a structure that can be downsized. Further, in this embodiment, the face-down tray 19 and the sheet feeding cassette 1 are arranged in a vertical type inclined at a predetermined angle, and the developing process unit centering on the photosensitive drum 10 is parallel to the sheet feeding cassette 1. Since it is installed, further miniaturization is promoted, and the installation occupation area of the printer device on the desk is reduced.

〔The invention's effect〕

As described above, in the printer device according to the present invention, the paper ejection unit for accommodating the image-transferred paper is provided in the machine frame, and the paper feed tray for accommodating the paper is arranged on the rear side of the paper ejection unit. A paper conveyance path is formed from the paper feed side of the paper feed tray to the paper ejection section via the back side of the paper feed tray. In the paper conveyance path, a photoconductor for forming a latent image and a photoconductor for forming a latent image are formed. A fixing device for fixing the visible image on the paper onto which the visible image formed by developing the above latent image is transferred is arranged, and the laser generating means for irradiating laser light is provided on the back side of the paper feed tray. The paper feed tray is provided with a reflecting member for reflecting the laser light generated from the laser generating means and guiding the laser light to the photoconductor.

As a result, the number of parts can be reduced, and the structure can be simplified and the cost can be reduced. Further, since the printer device is downsized, there is an effect that the installation occupation area can be reduced.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and is a schematic overall configuration diagram showing a printer device. 1 is a paper feed cassette, 3 is a mirror (reflection member), 10 is a photoconductor drum, 12 is a semiconductor laser device (laser generation means), 13 is a developing device, 16 is a heat roller, 19 is a face-down tray (paper ejection unit) ), 19a is a face-down paper inlet, 21 is a manual paper feed section, 22 is an outlet, 25 is a paper transport path, 26
Is the machine frame.

Claims (1)

[Claims] 1. A paper ejecting section for accommodating a sheet on which an image is transferred is provided in a machine frame, and a paper feeding tray for accommodating a sheet is arranged on the back side of the paper ejecting section, and a paper feeding side of the paper feeding tray. A paper transport path is formed from the rear side of the paper feed tray to the paper discharge section. In this paper transport path, a photoconductor for forming a latent image and a latent image on the photoconductor are developed. A fixing device for fixing the visible image formed on the paper on which the formed visible image is transferred is arranged, and a laser generating means for irradiating a laser beam is provided on the back side of the paper feed tray, and the laser generating means is also provided. A printer device, wherein a paper feed tray is provided with a reflecting member for reflecting the laser light generated from the sheet and guiding it to the photoconductor.