JPH03182096A - Shield plate fitting structure of operator panel unit - Google Patents

Abstract

PURPOSE:To facilitate fitting and removal of a printed circuit board and enhance the economy by putting a metal seal plate upon an operator panel case so that the folded part of the seal plate is in contact with a frame earth, and by detaining said folded part with the panel case. CONSTITUTION:In an operator panel unit 21 a printed circuit board 5 is installed, wherein electronic parts are mounted within an operator case 22 to be fixed to the surface of a device in which a frame earth 12 is incorporated. Therein a shield plate 23 made of metal having a folded part 26 at the end is inserted by the end into a hole 27 and put upon the case 22, and the curved tip 26a of the end part is put in contact with earth 12 and secured to the case 22 with the aid of a boss 24. This constitution ensures easy fitting and removal of the seal plate and also printed circuit board 5, and there is not fear of contacting of the shield plate with electronic parts to allow elimination of insulation sheet, which should enhance the economy.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a shield plate mounting structure for an operator panel unit in which a printed board with various electronic components is mounted inside an operator panel case that is attached to the surface of a device such as a printer. In order to make it easier to attach and remove the printed circuit board and to reduce costs, the operator uses a printed circuit board with various electronic components mounted inside the operator panel case, which is attached to the surface of the device with a built-in frame ground. In the panel unit, a metal shield plate having a bent portion at the end is provided, and the shield plate is placed over the operator panel case from above so that the bent portion is in contact with the frame ground. The structure is such that the case is attached by locking the two folded portions.

[Industrial Field of Application] The present invention relates to a shield plate mounting structure for an operator panel unit, which includes a printed board with various electronic components mounted inside an operator panel case that is attached to the surface of a device such as a printer. be.

[Conventional technology]

FIG. 3 is an external perspective view of a printer 11 equipped with a conventional operator panel unit 2, and the printer is operated by operating the operator panel unit 2. FIG. 4 is a cross-sectional view showing the structure of this operator panel unit 2, in which 1 indicates the printer 11.
It is the cover (surface) of. Operator panel unit 2
is attached to the opening 3 of this cover 1.

The operator panel unit 2 includes a printed board 5 inside an operator panel case 4 that is installed so as to close an opening 3.
An operator panel sheet 6 is attached to the surface of the operator panel case 4. Various electronic components such as a switch 7, a light emitting diode 8, etc. are mounted on the printed board 5.

Conventionally, a metal shield plate 9 is used as a countermeasure against radio waves and static electricity for the operator panel unit 2. The shield plate 9 has bent portions 9a at both ends, and is inserted between the operator panel case 4 and the printed board 5. In this state, the curved portion 9b at the tip of the bent portion 9a of the shield plate 9 comes into contact with the frame ground 12 inside the printer.
This provides countermeasures against radio waves and static electricity.

[Problem to be solved by the invention]

However, in the conventional structure described above, since the shield plate 9 and the mounted components and patterns on the printed board 5 come into contact with each other, an insulating sheet 10 was conventionally provided between the shield plate 9 and the printed board 5. This makes it difficult to attach and detach the printed board 5.
And the cost was high.

SUMMARY OF THE INVENTION An object of the present invention is to provide a shield plate mounting structure for an operator panel unit that facilitates attachment and detachment of a printed board and reduces costs.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides an operator panel unit in which a printed board on which various parts are mounted is mounted in an operator panel case that is attached to the surface of an apparatus with a built-in frame ground. A metal shield plate having a portion is provided, and the shield plate is placed over the operator panel case from above so that the bent portion is in contact with the frame ground surface, and the bent portion is locked to the operator panel case. The configuration is such that it can be installed by

[For production]

The shield plate is attached to the operator panel case by covering it from above, and the shield plate can be easily attached and detached, and the printed board can also be attached and detached easily. Moreover, by adopting such a structure, the insulating sheet that was conventionally required is no longer necessary, and the cost is reduced.

〔Example〕

The present invention will now be described in detail with reference to FIGS. 1 and 2.

FIG. 1 is a sectional view showing the structure of the operator panel unit 21 of this example, and FIG. 2 is an exploded perspective view of the same. In the figure, 22 is an operator panel case, and 23 is a metal shield plate. Note that the same reference numerals are used for members that are common to the conventional one.

The operator panel case 22 is attached to close the opening 3 and has a protrusion 24 on the inner wall surface.

The shield plate 23 has a bent portion 26 at both ends in which a hole 25 is formed, and a curved portion 26a is formed at the tip of the bent portion 26.

The shield plate 23 is placed over the operator panel case 22 from above by inserting each bent portion 26 into a multi-hole 27 provided in the operator panel case 22, and the hole 25 is inserted into the multi-hole 27 provided in the operator panel case 22.
4 and the curved portion 26a is brought into contact with the frame ground 12 inside the device, and the operator panel sheet 6 is attached thereon to form the operator panel unit 21. Further, the shield plate 23 can be easily removed by reversing the procedure described above.

In this way, the shield plate 23 is attached to the operator panel case 22 by covering it from above, and the shield plate can be easily attached and detached, and the printed board 5 can also be attached and detached easily. Moreover, by adopting such a structure, the insulating sheet that was conventionally required is no longer necessary, and the cost is reduced.

[Effects of the Invention] As described above, according to the present invention, it is possible to easily attach and detach a printed board and to reduce costs.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the structure of an operator panel unit according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is an external perspective view of a printer equipped with a conventional operator panel unit, and FIG. The figure is a sectional view showing the structure of a conventional operator panel unit. In the figure, 5 is a printed board, 12 is a frame ground, 21 is an operator panel unit, 22 is an operator panel case, 23 is a shield plate, and 26 is a bent part. be.

Claims (1)

[Scope of Claims] A printed board (5
), a metal shield plate (23) having a bent portion (26) at the end is provided, and the shield plate (23) is placed above the operator panel case (22). The operator is characterized in that the folded part (26) is placed over the frame ground (12) so as to come into contact with the frame ground (12), and the folded part (26) is locked and attached to the operator panel case (22). Panel shield plate mounting structure.