JPH0789261B2 - Recording device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a recording device such as an electrophotographic copying machine, a printer, and a facsimile. In particular, the present invention relates to a recording apparatus in which a recording sheet is discharged with a recording surface facing down to a tray portion of a main body cover, and an electric circuit board is provided inside the main body cover.

2. Description of the Related Art In the above recording apparatus, for example, a printer, a well-known electrophotographic process such as the Carlson process is executed by a controller provided on the above electric circuit board. In this case, recent printers are required to have multiple functions, and it is no longer sufficient that a single electrophotographic process can be always performed.
In order to achieve such multi-functionality, it is necessary to change the main part of the controller as necessary.

In the case of making such a change, in the conventional printer, all the electric circuit boards are taken out of the printer and the necessary parts are changed, but this operation is very complicated.

Aim of the Invention In view of the above points, an object of the present invention is to provide a recording apparatus in which a main part of an electric circuit board can be easily changed and therefore many functions can be exhibited by a simple operation.

Structure The above-mentioned object is achieved by providing an opening / closing member for opening the electric circuit board to the outside in a portion of the main body cover of the recording apparatus facing the electric circuit board.

Hereinafter, the present invention will be described based on examples.

FIG. 1 is a side sectional view of a printer which is an embodiment. In the figure, this printer has an upper unit 20 and a lower unit 1.
Is divided into and A charging and cleaning unit 3 is provided around the drum-shaped photoconductor 2 disposed in the lower unit 1.
Developing device 4, toner cartridge 4-1, optical device 21,
A transfer device 7 is provided.

The recording paper P accommodated in the paper container 50 arranged on the right side of the lower unit 1 is lifted up when the bottom plate 51 in the container 50 is pushed up by the lever 60 and abuts on the paper feed roller 5, Then, the paper is fed by rotation of the paper feed roller 5. Reference numeral 61 is the center of rotation of the lever 60, and 62 is a recording paper separating device equipped with a friction pad. The recording paper P sent out by the paper feed roller 5 passes through the registration switch SW1 and the registration roller 6, and passes through the photoconductor 2 and the transfer device 7.
It is transported between and.

The surface of the photoconductor 2 is uniformly charged by the charging unit 3 during the above-described process of conveying the recording paper P.
The image is exposed to form an electrostatic latent image corresponding to the image on the surface, and the electrostatic latent image is further developed (visualized) by the developing operation by the developing device 4.

The visible image formed on the photoconductor 2 is superposed on the recording paper P sent between the photoconductor 2 and the transfer unit 7, and under the action of the discharge of the transfer unit 7. It is transferred onto the recording paper P. After that, the recording paper P is fixed to the fixing device 8 and the switch
After passing through SW2 and the paper discharge roller 9, the paper is discharged in the A direction or B direction selected by the switching lever 100. The recording paper P discharged in the B direction is stacked on the paper discharge tray T. The recording paper P discharged in the A direction is reversed and discharged on the reverse discharge tray 25-2 which is a part of the main body cover 25. 25-1 and 26 are guide members for the recording paper P, and 27 is a paper discharge roller.

The upper unit 20 is covered with a body cover 25, and a frame 24, which is a structural member, is housed inside the body cover 25. In the frame 24, in addition to the optical device 21,
A power supply device 23 and the like are stored. A chassis 30 is attached to the upper part of the frame 24, and a printed circuit board (electrical circuit board) 22 is housed inside the chassis 30. The printed board 22 includes a driver board 22-1 and a controller board 22-2 for controlling the operation of the printer. The controller board 22-2 is connected to a host computer (for example, a personal computer) not shown, and drives and controls the optical device 21 based on character information sent from the host computer.

The recording paper discharged to the reverse discharge tray 25-2 as indicated by arrow A in FIG. 1 is placed on the reverse discharge tray 25-2 as indicated by P'in FIG. The opening / closing member 28 is detachably attached to the main body cover 25 as will be described later, but a step D is provided between the opening / closing member 28 and the upper surface of the main body cover 25, and as described above, the reverse sheet ejection is performed. Tray 25
-2, when taking out the recording paper P'placed on it, the fingertip can be put under the recording paper P'and the recording paper P '
Make it easy to take out.

FIG. 3 shows in detail the chassis 30 mounted on top of the frame 24 in FIG. Driver board
22-1 and the controller board 22-2 are housed and fixed in the chassis body 31. And those boards 22-
From the top of 1,22-2, attach the chassis cover 32 to the chassis body 31
Secure with several screws to. Reference numeral 22-3 is a printed circuit board, an IC memory, etc. (hereinafter,
It is called a spare substrate). The spare board 22-3 is mounted on the controller board 22-2 as required when the user requests the printer to have multiple functions.

Since the spare substrate 22-3 is attached and detached as needed, it is desirable that the user can easily handle it. Therefore, an opening 32-1 slightly larger than the spare board 22-3 is provided at a position corresponding to the spare board 22-3 in the chassis cover 32 of FIG. The opening 32-1 is closed by the chassis door 33. The closed state is shown in FIG. Chassis
One end 33-1 of the chassis door 33 is inserted into the positioning hole 32-2 of 32.
, And the leaf spring 33-2 is attached to the chassis cover 32.
Is fitted into a bent portion 32-3 provided around the opening 32-1. The leaf spring 33-2 may be riveted or welded to the chassis door 33, or may be integrally manufactured with the same member as the chassis door 33. The chassis body 31, the chassis cover 32, and the chassis door 33 are made of an iron plate, an aluminum plate, or the like, and the chassis cover 32 covers the substrates 22-1, 22-2,
The electromagnetic waves are shielded by covering 22-3 and the like.
It should be noted that the chassis body 31 is appropriately provided with a hole for drawing an electric wire therein.

As shown in FIGS. 4 and 5, an opening 25-3 is provided in the cover 25 at a portion corresponding to above the chassis door 33. The cover opening 25-3 is closed by the opening / closing member 28. Hooks 28-1 and 28-2 are formed on the opening / closing member 28, and the opening / closing member 28 is attached to the body cover 25 by fitting these hooks on the edges of the opening 25-3 of the body cover 25. .

When the user wants to add the spare board 22-3 for the purpose of expanding the function, the opening / closing member 28 is first removed from the main body cover 25. The opening / closing member 28 can be removed by inserting a coin or the like into the groove 28-3 shown in FIG. 4 and FIG. Next, when the leaf spring 33-2 of the chassis door 33 is pinched and pulled up, the chassis door 33 is removed from the chassis 30. Thus, the opening of the main body cover 25 is located above the position where the spare substrate 22-3 is to be mounted.
It is opened to the outside through 25-3. Therefore, the user does not have to take out the entire main body cover 25 and further the entire electric circuit board such as the driver board 22-1 and the like, and can easily prepare a spare board.
22-3 can be mounted in place.

In the above-mentioned embodiment, the opening / closing member 28 is attached to a portion (a concave portion for facilitating the taking out of the recording paper P ') having a step D from the surface of the main body cover 25. However, there are cases in which the opening / closing member 28 and the chassis door 33 cannot be provided in the above-mentioned recessed portion due to the arrangement of parts of the boards 22-1, 22-2, 22-3. In this case,
The opening / closing member 28 is designed so that the leading end of the recording paper P ′ discharged to the reverse discharging tray 25-2 is not caught by the opening / closing member 28.
It is preferable that the upper surface of 28 is slightly lower than the upper surface of the reverse sheet ejection tray 25-2 and the upper surfaces of the other main body covers 25.

Effect According to the present invention, since the main part of the electric circuit board can be opened to the outside by opening and closing the opening / closing member, it is possible to extremely easily change the electric parts such as the spare board placed on the main part.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a printer which is an embodiment, FIG. 2 is an overall perspective view of the printer, FIG. 3 is an exploded perspective view of an electric chassis 30, and FIG. 4 is an exploded perspective view of main parts of an upper unit 20. , Fifth
FIG. 6 is an enlarged sectional view of an essential part of FIG. 1, and FIG. 6 is an enlarged view of an essential part of FIG. P …… Sheet (recording paper) 25 …… Main body cover 25-2 …… Tray part (reversed paper ejection tray) 22,22-3 …… Electrical circuit board 28 …… Opening / closing member

Claims (1)

[Claims] 1. A recording apparatus in which a recorded sheet is discharged to a tray portion of a main body cover with a recording surface facing down, and an electric circuit board is provided inside the main body cover. A recording apparatus, wherein an opening / closing member for releasing the electric circuit board to the outside is provided in a portion of the electric circuit board facing the electric circuit board.