JPH0656805B2 - Electronic device operating device - Google Patents

Description

The present invention relates to an operating device for electronic equipment having a signal system.

(Prior Art) In recent years, microcomputers have been mounted in electronic devices such as copying machines and printers, and it has become possible to control each part of the devices in a complicated and precise manner by the microcomputers. For this reason, this type of device has many signal systems and is very susceptible to noise from the outside.

The external noise may be from other electric appliances, but may also be due to the discharge of static electricity charged to the operator. That is, the human body is usually charged with 10 kV to 15 kV by static electricity generated by friction of clothes, etc., but when the operator operates the device, the static electricity is discharged to the metal part of the operation unit, and discharge noise is generated in the signal system. It may occur and cause malfunction.

FIG. 2 is a schematic diagram of a density adjusting unit as an example of a conventional operating unit of a copying machine. An operator 1 holds a density adjusting slide volume 3 provided on a substrate 2 and holds a knob 4 in the direction of arrow a in the drawing. Move to and operate. In the figure, 5 is LE
A display member such as D, 6 is an operation panel sheet. Further, the operation panel sheet 6 is provided with a slit opening through which the operation shaft 3a of the slide volume 3 is inserted. The outer box of the slide volume 3 is made of a metal member. Therefore, if the operator 1 is charged, the static electricity is discharged to the outer box of the slide volume 3 through the slit opening of the operation panel sheet 6 as shown by the arrow b in the figure, and affects the signal line on the substrate 2. To generate discharge noise, which causes malfunction.

In order to prevent this kind of discharge noise, a large distance is provided from the slit opening to the outer box of the slide volume 3 as shown in FIG. 3, and the slide volume 3 having a long operation shaft 3a is used, or As shown in FIG. 9A, the insulating member 7 is provided between the slit opening and the slide volume 3.

However, in such a conventional operating device,
First, in the operation device shown in FIG. 3, the distance c between the substrate 2 and the operation panel sheet 6 becomes large, and it is necessary to attach the spacer 8 to the display member 5, resulting in an increase in the number of parts. There were problems such as things that cannot be done.

Generally, a 1 mm creepage distance is required for discharging static electricity charged to 1 kV, so human body charging (10 kV ~
15 kV) requires a creepage distance of at least 10 to 15 mm for discharging. Conversely speaking, if the outer box of the slide volume 3 is released from the slit opening portion by 10 to 15 mm or more, no electric discharge will occur, but if so, the size of the device becomes large.

On the other hand, in the operating device of FIG. 4 as well, as shown in FIG. 4 (b), unless the wide insulating member 7 is inserted, the effect of preventing discharge is small and the device becomes large. There is a problem in that electric discharge also occurs from the gap between the slide volume and the operation shaft 3a (d in FIG. 4B), which cannot be completely prevented.

It is also possible to use a resin instead of a metal member for the outer box of the slide volume to prevent discharge, but this would require a special process with the resin of the slide volume, which would result in a very high cost. .

(Object and Structure of the Invention) The present invention has been made in view of the above points, and is directed to an electronic device in which a movable part of an electric component is linearly reciprocated by a manual operation on a substrate of the electronic device having a signal system. In the operating device, the purpose is to prevent discharge noise due to human body charging with a thin and inexpensive device, therefore, a dummy movable member having a linearly reciprocating insulating property is provided on the surface of the substrate on the manually operating side, The movable part of the electric part is provided on the opposite surface of the substrate, the movable part of the electric part and the dummy movable member are interlocked by using an insulating member, and the movable part of the electric part is reciprocated by the manual operation through the dummy movable member. Configured to let.

(Embodiment) The present invention will be described below with reference to the drawings by taking a slide volume for density adjustment of a copying machine as an example.

FIG. 1 (a) is a schematic diagram of an embodiment of an operating device for an electronic device according to the present invention, and (b) is a perspective view. In FIG. 1, the same components as those in FIG. 2 are designated by the same reference numerals. There is.

In the figure, 3 is a slide volume mounted on the back side of the substrate 2, 9 is a resin-made dummy movable member which is provided on the surface of the substrate 2 on the manual operation side and which is linearly reciprocable.
Reference numeral a is a resin guide member for guiding the reciprocating movement of the dummy movable member 9, and 10 is an insulating film. Insulation film 1
0 is made of a strip-shaped polyester film having a thickness of 0.1 mm, and covers the slide volume 3 and the guide member 9a so as to wrap them, and has holes 11a at both ends thereof and a hole 11 at the center thereof.
b, the dummy movable member 9 is fitted in the hole 11a, and the operation shaft 3a of the slide volume 3 is fitted in the hole 11b at the center.

When the dummy movable member 9 is manually reciprocated in the arrow a direction in the figure by the knob 4, the force is transmitted by the insulating film 10, and the operation shaft 3a of the slide volume 3 is reciprocated in conjunction with the arrow direction e in the figure. To do. That is, knob 4
By reciprocally moving the dummy movable member 9, the resistance value of the slide volume 3 can be changed through the insulating film 10 to adjust the copy density.

With the above configuration, even if the outer box of the slide volume 3 is made of metal, the outer box is provided on the back side of the substrate 2 and is sufficiently separated from the slit opening of the operation panel sheet 6, so that the human body is not charged. Discharge does not occur. Further, since the slide volume 3 is covered with the insulating film 10, it is possible to completely prevent discharge. Moreover, according to the present invention, since the slide volume is provided on the back side of the substrate 2, the operating portion can be made thin, and the conventional slide volume having the metal outer box can be used, so that the discharge noise can be obtained at low cost. Can be prevented.

In the above embodiment, the slide volume is used as the electric component having the movable portion, but the present invention is not limited to this, and is applicable to, for example, a changeover switch. Further, although the copying machine is taken as an example in the above embodiment, the present invention can be applied to other devices (printer, television, etc.) as long as it is an electronic device having a signal system.

Further, in the above-described embodiment, the dummy movable member and the movable portion of the electric component are interlocked with each other by using the insulating film, but the invention is not limited to this, and they may be interlocked by using, for example, a rack or a pinion mechanism.

(Effects of the Invention) As described above, in the present invention, a dummy movable member having an insulating property that can linearly reciprocate is provided on the surface of the substrate on the manual operation side, and the electric component of the electric component is provided on the opposite surface of the substrate. Since the movable part is provided, the movable part of the electric component and the dummy movable member are interlocked with each other by using the insulating member, and the movable part of the electric component is reciprocated by the manual operation of the dummy movable member, the signal system In an operating device of an electronic device having
With a thin and inexpensive device, discharge noise due to human body charging can be prevented.

[Brief description of drawings]

FIG. 1 (a) is a schematic diagram of an embodiment of an operating device for electronic equipment according to the present invention, and (b) is a perspective view thereof, FIG. 2 and FIG.
FIGS. 4A and 4B are schematic diagrams of the density adjusting unit of the conventional copying machine. 1 ... Operator, 2 ... Substrate, 3 ... Slide volume, 3a ... Operation axis, 4 ... Knob, 5 ... Display member, 6 ... Operation panel sheet, 7 ... Insulating member, 8 ...
Spacer, 9 ... Dummy movable member, 10 ... Insulating film

Claims (1)

[Claims] 1. An operating device of an electronic device, wherein a movable part of an electric component is linearly reciprocated by a manual operation on a substrate of an electronic device having a signal system, wherein the surface of the substrate on the manual operating side is linearly moved. A dummy movable member having reciprocating insulation is provided, a movable portion of the electric component is provided on the opposite surface of the substrate, and the movable portion of the electric component and the dummy movable member are interlocked using an insulating member, An operating apparatus for an electronic device, wherein a movable portion of the electric component is reciprocated by manual operation via the dummy movable member.