JPH0457281A - Electronic equipment - Google Patents

Abstract

PURPOSE:To prevent malfunction even when an electronic device is inserted and fitted to an electronic system and the electronic system is operated by covering the surface of a conductive material at a part revealed from an inserting port with an insulated film in the state of inserting and fitting it to the inserting port. CONSTITUTION:When a cassette 4 is inserted and fitted to an adapter 5, a connector 6 on the cassette 4 side is coupled with a connector A on the adapter 5 side and a memory cell or the like in the cassette 4 is electrically connected to an electronic circuit 8 in the adapter 5. The external surface of the electronic device such as the cassette 4 is covered with an insulated film 13 and the insulated film 13 is formed at the part revealed from an inserting port 7A in the state of inserting and fitting it to the electronic systems of the adapter 5 or the like. Even when touching the electronic device while operating the electronic system, no current flows to the electronic system side by discharging.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to electronic equipment, for example, electronic equipment such as cassette memories or IC memories.

[Conventional technology]

For example, cassette memory is convenient to carry, and can be inserted and inserted into the insertion hole of an electronic device such as a computer, allowing the electronic device to write information into the memory cassette or write information from the memory cassette. is now read out.

Some of these cassette memories have an outer surface made of a conductive material.

The reason for this is that a shielding effect is provided to prevent malfunction of the memory element due to external electromagnetic disturbance noise or electromagnetic radiation from the cassette memory itself.

[Problem to be solved by the invention]

However, when such a cassette memory is inserted into an insertion hole of a computer, etc., and the computer writes information into the memory cassette or reads information from the memory cassette, However, malfunctions often occurred during the exchange of information.

As a result of investigating the cause of this, the following was discovered. That is, if a cassette memory is inserted and a charged object somehow touches the cassette memory book, static electricity will be generated on the cassette memory. Then, this discharge of static electricity generates a current on the ground side through the cassette memory and computer. This current may adversely affect the electronic circuitry within the computer, or cause malfunctions in reading or writing of memory elements in the memory cassette connected to the electronic circuitry.

Therefore, the present invention has been made based on these circumstances, and its object is to insert and attach an electronic device to an electronic device such as a computer, and to operate the electronic device. The purpose of the present invention is to provide electronic equipment that will not malfunction even when it is used.

[Means to solve the problem]

In order to achieve such an object, the present invention basically provides an electronic device that exchanges information with an electronic device while being removably inserted into an insertion hole of the electronic device. and whose external surface is formed of a conductive material, wherein at least the surface of the conductive material exposed from the insertion hole when inserted into the insertion hole is coated with an insulating film. It is characterized by being worn.

[Effect]

The electronic device configured in this way has an insulating film coated on a part of its external surface, and this insulating film covers the part exposed from the insertion hole when inserted into the electronic device. It was formed in Therefore, even if the person inserting the electronic device touches the electronic device for some reason while the electronic device is in operation, the electronic device will be charged with an electrical charge because the contact area is on the insulating film. No current flows to the electronic device due to the discharge of static electricity.

As a result, the electronic device operates normally, and information can be exchanged normally with the electronic device without malfunctioning.

〔Example〕

FIG. 1 is a configuration diagram showing an embodiment of an electronic device according to the present invention together with an electronic device.

In the figure, there is an adapter 5 which is an electronic device. This adapter 5 is equipped with an electronic circuit 8 and also has a connection part 7 for attaching a cassette 4, which is an electronic device to be described later.
The connecting portion 7 is a box-shaped body into which the cassette 4 is inserted, and has an insertion hole 7A for the cassette 4. Further, the connecting portion 7 is provided with a connector 7B on the side opposite to the insertion hole 7A side, and a terminal taken out from this connector 7B is connected to the electronic circuit 8.

On the other hand, the cassette 4, which is an electronic device, has a box shape, and a memory element such as a ROM, RAM, or magnetic bubble memory is incorporated inside the cassette 4. In this case, it goes without saying that not only the above-mentioned memory element but also other electronic components such as IC or LSI may be incorporated.

A connector 6 is attached to the end of the cassette 4 that is inserted into the adapter 5, and the terminals of this connector 6 are connected to the memory element and the like.

Therefore, when the cassette 4 is inserted into the adapter 5, the connector 6 on the cassette 4 side and the connector 7A on the adapter 5 side are connected, and the memory element etc. in the cassette 4 is connected to the electronic circuit 8 in the adapter S. Electrical connections will be made.

FIG. 2 shows a cross-sectional view of the cassette 4 shown in FIG. 1 along the -shore line. In FIG. 2, the envelope of the cassette 4 consists of a protective case 11 made of a conductive material. The reason why this protective case 11 is made of conductive material is to prevent malfunction of the memory element due to external electromagnetic disturbance noise or electromagnetic radiation from the cassette memory itself, as mentioned above. This is to provide a shielding effect. A printed circuit board 6 embedded in the connector 6 is disposed inside the protective case 11, and an electronic component 10 including a memory element or the like is mounted on the main surface of the printed circuit board 6.

And, on a part of the surface of the protective case 11 of the cassette 4, #4! A-edge membrane 13 is applied. This Ull
The membrane 13 is formed on the side opposite to the connector 6. That is, when the cassette 4 is inserted into the adapter 5 as shown in FIG. The insulating film 13 is applied to parts that may come into contact with other people.

For example, this insulating film 13 has an internal resistance of 107
Ωm or more, dielectric breakdown 10 KV/mm or more,
The film thickness is 0.1 mm or more. Further, as the material, rubber, paraffin, plastics, etc. are selected.

According to the electronic device such as the memory cassette 4 configured in this way, the insulating film 13 is adhered to a part of the external surface, and this insulating film 13 is attached to the electronic device such as the adapter 5. It is formed in the part exposed from the insertion hole 7A when inserted into the body. therefore,
Even if a person inserting an electronic device or the like touches the electronic device for some reason while the electronic device is in operation, the electronic device will not be charged with electricity because the contact area is on the insulating film 13. No current flows to the electronic device due to the discharge of static electricity.

That is, since discharge from a charged body occurs when the electrolytic strength becomes greater than the dielectric strength, the dielectric strength is improved by the insulating film 13.

Furthermore, when a discharge occurs, the noise level for the electronic device is determined by the peak value of the flowing current and the discharged energy.

FIG. 4 shows an equivalent circuit during this discharge.

It is assumed that the equivalent capacitance 1 of the charged body is C, the equivalent resistance 2 of the electronic device to be discharged is R1, and the equivalent resistance 3 of the insulating film 13 is R2. Then, if the voltage of the charged body is V, the current flow is: I = (V/(Rx + Rz)) ・axp(-t/(R□
+Rz)C). As can be seen from the above equation, as R2 increases, the peak value of the flowing current decreases. Moreover, the energy P applied to R2 is as follows: P=I''R2+I2R□, and is consumed by R2 and decreases.

As a result, the electronic device operates normally, and information can be exchanged normally with the electronic device without malfunctioning.

In the embodiment described above, the part on which the insulating film is formed is the part exposed from the insertion hole of the adapter when the adapter is inserted into the insertion hole, but this part is kept as the minimum necessary. It goes without saying that it is necessary, and there is no problem even if it is attached to other parts.

In the embodiments described above, a memory cassette was explained as an electronic device, but it goes without saying that the present invention can also be applied to other IC memories.

In short, the electronic device to which the present invention is directed is an electronic device that exchanges information with an electronic device while being removably inserted into an insertion hole of the electronic device.
It can be applied as long as the outer surface is made of a conductive material.

Further, in the above-described embodiments, an adapter has been described as the electronic device, but it is not necessarily limited to this adapter, and it goes without saying that the electronic device may be used as a computer itself.

〔Effect of the invention〕

As explained above, according to the electronic device according to the present invention,
It is possible to insert an electronic device into an electronic device such as a computer and prevent it from malfunctioning even when the electronic device is operated.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of an electronic device according to the present invention together with the electronic device, and FIG. 2 is an n-
3 is an explanatory diagram showing the electronic device according to the present invention inserted into an electronic device; FIG. 4 is an explanatory diagram showing the effects of the electronic device according to the present invention. 6 In the figure, 4...Cassette, 5...Adapter, 6...
Connector, 7... Connection part, 8... Electronic circuit part, 11
...Protective case, 13...Insulating film. Figure 1 Figure 2

Claims (3)

[Claims] 1. An electronic device that exchanges information with an electronic device while being removably inserted into an insertion hole of the electronic device, and whose outer surface is formed of a conductive material, An electronic device characterized in that an insulating film is coated on at least a surface of the conductive material exposed from the insertion hole when the electronic device is inserted into the insertion hole. 2. 2. The electronic device according to claim 1, wherein the electronic device is a cassette memory. 3. 2. The electronic device according to claim 1, wherein the electronic device is an IC memory.