JPH0722679Y2 - Shield - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] The present invention relates to a new structure of a shield plate used in a print drum unit portion of a printer device, for the purpose of providing a structure that allows the shield plate to be easily attached to the print drum unit portion. In a shielding plate having ear pieces with stoppers that engage with the mounting holes of the support frame side plate above and below the portion, at least one of the upper and lower ear pieces is provided with a notch at the base, and the end of the notch is provided. A bulge-shaped hole was formed.

[Industrial application field]

The present invention relates to a new structure of a shield plate provided in a print drum unit of a laser printer device.

In recent years, electrophotographic printers using the laser system have been widely adopted not only in large-sized devices but also in small-sized devices for general users.

For this reason, there is a strong demand for a device that is easy to assemble and is cheaper.

[Conventional technology]

As shown in FIG. 2, the normal laser printer device includes a developing unit 2 for developing the developing toner on the drum 7 and a transfer unit for transferring the developing toner on the drum 7 to the paper 8 around the print drum unit unit 1. It is configured with 3.

The print drum unit unit 1 includes a drum 7, a charging unit 6 that charges the surface of the drum 7 in a predetermined manner, and a cleaning unit 4 that sweeps off the developing toner remaining on the drum after transferring the developing toner from the drum 7 onto the sheet 8. And a shield plate on the front surface of the print drum unit 1 on the side of the developing unit 2.
Ten are provided. The shield plate 10 is provided in front of the print drum unit 1 to prevent development toner from entering from the development unit 2.

As shown in FIG. 3, the mounting structure of the shielding plate 10 is a structure in which ear pieces with stoppers that engage with the mounting holes of the support frame side plate 5 are provided at the upper and lower sides of both side end portions. This is a structure in which support frame side plates 5 for attaching the shield plates 10 are provided on both sides.

Then, the ear pieces with stoppers of both side terminals of the shield plate 10 are engaged with the mounting holes of the support frame side plate 5 of the print drum unit 1.

[Problems to be solved by the device]

However, the conventional structure has a drawback that the base of the ear piece is easily broken when the ear pieces with stoppers of both terminals of the shield plate are engaged with the mounting holes of the support frame side plate of the print drum unit.

In view of the above-mentioned problems, the present invention has a new structure in which the base portion of the ear piece of the shield plate is not easily broken, and has an object of improving the assembling workability.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, according to the present invention, as shown in the shield plate structure diagram of FIG. 1, shield plates having ear pieces 11 with stoppers that engage with the mounting holes of the support frame side plates are provided at the upper and lower ends of both sides. In the above, there is provided a shielding plate 10 characterized in that at least one of the upper and lower ear pieces 11 is provided with a notch 12 at a base portion thereof, and a bulge-shaped hole 13 is formed at a terminal end of the notch 12.

[Action]

According to the structure of the present invention as described above, when the shield plate is attached to the print drum unit, even if a load is applied to both ends of the ear piece, the load is not concentrated at one point, so that it is not damaged.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

Either one of the left and right ends of the ears 11 is vertically sandwiched by the support frame side plate 5 provided in the print drum unit section 1, and the gap is narrowed to be inserted into the mounting opening of the support frame side plate 5. The ear piece 11 is also inserted into the mounting opening on the opposite side of the support frame side plate 5 at the end portion in the same manner, and fixed to the support frame side plate 5 by the stoppers of the four ear pieces 11.

As shown in FIG. 1, the structure of the shield plate 10 is such that upper and lower ear pieces 11 are arranged so that concentrated load in the vertical direction is distributed to the base of the ear piece 11.
Of at least one of the ear pieces 11 with a stopper is provided with a notch 12 and a bulge-shaped hole 13 is provided at the end of the notch 12.

[Effect of device]

As described above, if the base portion of the ear piece of the shield plate is made to have a new structure that does not easily break, the assembly workability is improved, and a cheaper device can be manufactured.

[Brief description of drawings]

FIG. 1 is a new structural view of a shield plate according to the present invention, FIG. 2 is an explanatory view of a mounting position of the shield plate on a print drum unit, and FIG. 3 is a conventional view seen from a section AA of FIG. It is a structural diagram of a shielding plate of. In the figure, 1 is a print drum unit part, 2 is a developing part, 3 is a transfer part,
4 is a cleaning unit, 5 is a support frame side plate, 6 is a charging unit, and 7 is a charging unit.
Is a drum, 8 is a sheet, 10 is a shielding plate, 11 is an ear piece, 12 is a notch of the ear piece, and 13 is a hole.

Claims (1)

[Scope of utility model registration request] 1. A shield plate (10) comprising selvages (11) with stoppers which engage with mounting holes of a side plate of a supporting frame above and below both end portions, at least one of the selvages (11). A shield plate having a notch (12) at the base of the ear piece and a bulge-shaped hole (13) formed at the end of the notch.