JPH04345895A - Memory card - Google Patents

Abstract

PURPOSE:To provide a memory card wherein static electricity from the outside can be discharged and hands will not be harmed in handling it. CONSTITUTION:An end of a conductive panel 1 is covered with an insulator 7 having a notch 10. On the end of the conductive panel 1, an exposed part 8 where the conductive panel l is exposed and a shielded part 9 where the conductive panel 1 is covered with the insulator 7 are provided. Accordingly, static electricity from the outside can be discharged to the exposed part 8 and the shielded part 9 does not harm hands at the time of handling since it is covered with the insulator 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a memory card, and more particularly to a memory card that has excellent antistatic properties and is safe to handle.

0002

2. Description of the Related Art Conventional memory cards include those shown in FIGS. 5 to 8. 5 and 7 are perspective views of conventional memory cards, FIG. 6 is a cross-sectional view taken along line AA in FIG. 5, and FIG. 8 is a sectional view taken along line BB in FIG. 7.
FIG.

In FIGS. 5 to 8, 1 is a metal conductive panel, 2 is a panel, 3, 4, 5, and 6 are connectors arranged between the conductive panels 1 and 2, a printed wiring board, Electronic components and contact portions; 7 is an insulator such as resin; 8 is an exposed portion of the conductive panel 1; and 9 is a shielding portion of the conductive panel 1 covered with the insulator 7.

In such a structure, in the memory card shown in FIGS. 5 and 6, the ends of the conductive panel 1 are all exposed parts 8 as shown in FIGS. 5 and 6, and the ends of the panel 2 are covered with an insulating material. Since it is covered with 7, it becomes all the shielding parts 9.

Therefore, since the ends of the conductive panel 1 are all exposed parts 8 as shown in FIGS. It is possible to prevent damage to the internal electronic components 5 by discharging the exposed portion 8 of the panel 1. However, since all the ends of the conductive panel 1 are exposed parts 8, there is a risk of injury to hands or the like due to the exposed parts 8 when handling the memory card.

In the memory card shown in FIGS. 7 and 8, the ends of the conductive panel 1 and the panel 2 are all covered with an insulator 7 as shown in FIGS. 7 and 8, so they all become a shield 9. There is.

Therefore, since the ends of the conductive panel 1 are all shielding parts 9 as shown in FIGS. 7 and 8, static electricity from the outside is discharged to the contact parts 6 of the connector 3, and the internal electrons are discharged. Destroy part 5. However, since all the ends of the conductive panel 1 are shielding parts 9, there is no exposed part 8 when handling the memory card, so it is safe.

[0008]

[Problems to be Solved by the Invention] The conventional memory cards shown in FIGS. 5 and 6 have the disadvantage that hands may be injured when handling the memory card, and the conventional memory cards shown in FIGS. It has the disadvantage that it cannot discharge static electricity from.

The present invention attempts to eliminate such conventional drawbacks, and its purpose is to provide a memory card that has excellent anti-static properties and is safe to handle.

0010

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention covers the ends of a conductive panel with an insulating material having a cutout, and exposes the conductive panel at the end of the conductive panel. The shielding part is covered with an insulating material.

[0011]

[Function] By covering the ends of the conductive panel with an insulating material having a notch, static electricity from the outside can be discharged at the exposed part of the conductive panel. This prevents damage to hands etc. due to the shielding part.

0012

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a memory card according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line CC in FIG. 1, showing a shielding portion of a conductive panel. FIG. 3 is a sectional view taken along the line DD in FIG. 1, showing an exposed portion of the conductive panel.

[0013] In FIGS. 1 to 3, reference numerals 1 to 9
indicates the same as the conventional one. Reference numeral 10 denotes a notch provided in the insulator 7. The cutout 10 forms an exposed portion 8 of the conductive panel 1 at the end of the conductive panel 1, and the area covered with the insulator 7 is conductive. It becomes the shielding part 9 of the panel 1.

Therefore, since the end of the conductive panel 1 is covered with an insulator 7 having a notch 10 as shown in FIG.
As shown in FIGS. 1 and 3, an exposed portion 8 of the conductive panel 1 is formed in the portion where the notch 10 is located, and static electricity from the outside is discharged to this exposed portion 8, thereby damaging the electronic component 5. There will be nothing left to do. On the other hand, in the part where the insulator 7 is located, as shown in FIGS. 1 and 2, the end of the conductive panel 1 is covered with the insulator 7 and becomes the shielding part 9 of the conductive panel 1, so that the conductive panel 1 is not conductive. An insulator 7 and a cutout 10 are interposed between the panel 1 and the hand, etc., so that the hand and the like will not be damaged and it is safe.

[0015] Hereinafter, experimental data for comparison of static electricity tests conducted by the inventors will be introduced. Note that an electrostatic test was conducted using the circuit shown in FIG. 4, and then changes in leak resistance of each terminal were measured (between each terminal and GND). (Example 1) Static electricity (KV) 3 5
8 ±10 15 ±20 trial
Trial No. 1 OK OK
OK OK OK OK try
Trial No. 2 OK OK OK
K OK OK OK Exam No. 3 OK OK OK
OK OK OK

(Comparative Example 1: Corresponding to FIGS. 5 and 6)
Static electricity (KV) 3 5
8 10 15 20
Test No. 4 OK OK
OK OK OK OK Test No. 5 OK OK
OK OK OK OK try
Trial No. 6 OK OK
OK OK OK OK

(Comparative example 2: corresponds to FIGS. 7 and 8)
Static electricity (KV) 3 4
5 6 8 10
Test No. 7 OK NG
− − −
- Test No. 8 OK O
K OK NG - -
Test No. 9 OK OK
OK OK OK NG

[0018] The leak resistance in test 7 4 (KV) was 10 MΩ → 1.2 Ω, the leak resistance in test 8 6 (KV) was 10 MΩ → 2.3 Ω, and the leak resistance in test 9 10 (KV) was 10 MΩ → 1.2 Ω.
The leak resistance at V) was 10MΩ→437KΩ.

[0019]

According to the present invention, static electricity from the outside can be discharged to the exposed portion of the conductive panel, and the shielding portion of the conductive panel is covered with an insulating material, so it is safe.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a memory card according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line CC in FIG. 1, showing a shielding portion of the conductive panel.

FIG. 3 is a sectional view taken along the line DD in FIG. 1, showing a shielding portion of the conductive panel.

FIG. 4 is an electrical circuit diagram used for static electricity testing.

FIG. 5 is a perspective view of a conventional memory card.

FIG. 6 is a sectional view taken along line AA in FIG. 5;

FIG. 7 is a perspective view of a conventional memory card.

8 is a sectional view taken along line BB in FIG. 7. FIG.

[Explanation of symbols] 1 Conductive panel 2 Panel 3 Connector 4 Printed wiring board 5　Electronic parts 7 Insulator 8 Exposed part 9 Shielding part 10 Notch

Claims (3)

[Claims] Claim 1: A memory card in which a connector, a printed wiring board, an electronic component, etc. are arranged between panels, and at least one side of the panel is formed of a conductive panel, wherein an end of the conductive panel has a notch. 1. A memory card characterized in that the conductive panel is coated with an insulating material, and an exposed portion of the conductive panel and a shielding portion covered with the insulating material are formed at an end of the conductive panel. 2. The memory card according to claim 1, wherein the conductive panels are provided on both sides. 3. The memory card according to claim 1, wherein a plurality of exposed portions of the conductive panel and a plurality of shielding portions formed by the insulating material are alternately provided.