JPH06177573A - Ic card - Google Patents

Abstract

PURPOSE:To provide an IC card giving high packaging efficiency and avoiding electromagnetic damage by a method wherein contact springs abutting against electromagnetic shielding panels are integrally provided with a contact terminal. CONSTITUTION:Electronic circuit components 2 such as memory IC etc., connectors 3, etc., are fixed on a wiring substrate 1 to form the electronic circuit on a wiring substrate 1 to be held by an upper metallic panel 5 and a lower metallic panel 6 after inserting the electronic circuit into a resin-made frame 4. At this time, the connectors 3 are provided with a contact spring 7 abutting against the upper metallic panel 5 as well as another contact spring 8 also abutting against the lower metallic panel 6. In such a constitution, the electronic shielding panels 5, 6 such as the metallic panels, etc., and the contact springs 7, 8 are connected to a grounding terminal to be integrally provided with the grounding terminal so that the conducting means between the grounding wire and the electromagnetic shielding panels 5, 6 on the wiring substrate 1 may be eliminated to increase the packaging efficiency of the wiring substrate 1 further enabling the damage to electromagnetic circuit components such as memory IC, etc., to be avoided without fail.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC card used as a storage medium or the like, and more particularly to an IC card having an electromagnetic shield plate and a connector for electrical connection.

[0002]

2. Description of the Related Art In recent years, IC cards have come to be widely used for applications such as expansion storage devices of personal computers. IC cards for storage media are called memory cards.

FIG. 10 is a sectional view schematically showing the general structure of a memory card. Memory I on wiring board 61
An electronic circuit component 62 such as C, a connector 63, and the like are attached to form an electronic circuit, which is fitted into a resin frame 64 and then sandwiched between an upper metal panel 65 and a lower metal panel 66.

Upper metal panel 65 and lower metal panel 66
Is used for the purpose of imparting mechanical strength to the card and electromagnetically shielding the entire electronic circuit. Therefore, the ground wire (not shown) of the wiring board 61 and the upper metal panel 65 are provided.
And a conductive spring 68 between the upper metal panel 65 and the lower metal panel 66, and the ground wire of the wiring board 61 to the ground terminal of the connector 63. It is connected to give an electromagnetic shielding effect. For example, when a high voltage is applied to the lower metal panel 66, the electric charge is generated by the spring 68 and the upper metal panel 6.
5, the spring 67, the ground wire of the wiring board 61, and the ground terminal of the connector 63 to flow to the external ground wire,
This prevents damage to the electronic circuit parts 62 inside the card or destruction of stored data.

[0005]

As described above, in order to provide the memory card with the electromagnetic shielding effect, the upper metal panel 65 and the lower metal panel 66 are connected to the spring 67,
It was necessary to connect to the ground wire of the wiring board 61 via the spring 68. Therefore, a space for the contact electrode of the spring 67 and a space for installing the holder 69 of the spring 67 are required on the wiring board 61. The holder 69 is usually formed integrally with the frame 64. In addition, a space for passing the spring 68 and the holder 70 for the spring 68 is also required. The holder 70 is also usually formed integrally with the frame body 64, and in this example, a part of the frame body 64 forms the holder. In order to secure these installation spaces, the effective mounting area of the wiring board 61 on which the electronic circuit component 62 is mounted has been narrowed. In addition, parts charges for springs 67 and 68 and installation costs were also required.

Further, since the high voltage applied to the upper metal panel 65 or the lower metal panel 66 flows to the ground terminal of the connector 63 through the ground wire of the wiring board 61, it affects the electronic circuit parts 62 near the ground wire. There was a case where the stored data was destroyed (so-called garbled data). Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks and provide an IC card having high mounting efficiency and strong against electromagnetic interference.

[0007]

According to the present invention, in an IC card having an electromagnetic shielding plate such as a metal panel and a connector for electrical connection with the outside, the electromagnetic shielding plate is connected to a ground terminal of the connector. A contact spring that comes into contact with is provided integrally with the ground terminal.

[0008]

Since the contact spring with the electromagnetic shielding plate such as the metal panel is connected to the ground terminal of the connector and provided integrally with this ground terminal, electromagnetic shielding can be achieved without using the ground wire on the wiring board. . For this reason, a means for connecting the ground wire on the wiring board and the electromagnetic shield plate is not required, the mounting efficiency of the wiring board is improved, and external noise flows through the ground wire on the wiring board to prevent the electronic circuit parts such as the memory IC from being used. Damage can be prevented more reliably.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a memory card will be described below with reference to FIGS. FIG. 1 is a cross-sectional view schematically showing the first embodiment, in which the connector terminal arrangement is of a single-stage type. An electronic circuit component 2 such as a memory IC, a connector 3 and the like are mounted on the wiring board 1 to form an electronic circuit, which is fitted in a resin frame 4 and then sandwiched between an upper metal panel 5 and a lower metal panel 6. It is like this. The connector 3 shows a cross-sectional view at the ground terminal portion, and a contact spring 7 for contacting the upper metal panel 5 is shown.
And a contact spring 8 that comes into contact with the lower metal panel 6.

FIG. 2 is an enlarged sectional view of only the connector 3, and FIG. 3 is an enlarged top view of the periphery of the ground terminal portion of the connector 3. FIG. 2 is a sectional view taken along the line AA of FIG. The dotted line in FIG. 3 represents the portion of the contact terminal 12 hidden in the connector housing 11.

A sleeve-shaped contact terminal 12 is fitted in a connector housing 11 formed of an insulating material such as resin. The contact terminals 12 are formed of an elastic material such as phosphor bronze, and contact springs 12a and 12b integrally formed and connected to the contact terminals 12 contact a contact pin (not shown) inserted from the outside. Contact and conduct. Through holes 13 are formed in the upper and lower surfaces of the ground terminal portion of the connector housing 11,
14 are formed, and other contact springs 12c and 12d integrally formed with and connected to the contact terminal 12 are loaded so as to penetrate the through holes 13 and 14 and jump out to the outer surface of the connector housing 11. ing. The contact springs 12c and 12d protruding to the outer side surfaces contact the upper metal panel 5 and the lower metal panel 6 in FIG. 1 to form conductive paths. The connection terminal 12e formed integrally with the contact terminal 12 and led out of the connector is shown in FIG.
Is connected to the wiring board 1 by soldering or the like.

The contact springs 12c and 12d are provided only on the ground terminal, and the other contact terminals are provided with only the contact springs 12a and 12b as shown in FIG.

FIG. 4 is a cross-sectional view schematically showing the second embodiment, in which the connector terminal arrangement is a two-stage type.
On the wiring board 21, an electronic circuit component 22 such as a memory IC,
After the connector 23 and the like are attached to form an electronic circuit, the electronic circuit is fitted into the resin frame 24, and then sandwiched between the upper metal panel 25 and the lower metal panel 26. The connector 23 is shown in a sectional view at the ground terminal portion, and has a contact spring 27 that comes into contact with the upper metal panel 25.

When the terminal arrangement of the connector is a two-stage type,
There are cases where the ground terminals are provided only in the upper stage or only in the lower stage, and there are cases in which they are provided in the upper stage and the lower stage, respectively. The upper metal panel 25
However, the lower metal panel 26 cannot be contacted through the connector 23. In this embodiment, a spring 28 is used to electrically connect the upper metal panel 25 and the lower metal panel 26.

FIG. 5 is a cross-sectional view of the ground terminal portion of the connector 23. The connector housing 31 made of an insulating material such as resin has sleeve-like contact terminals 32 and 34 fitted therein. There is. The contact terminal 32 is formed of an elastic material such as phosphor bronze, and the contact springs 32a, 32b, 34a, 34 are integrally formed and connected to the contact terminal 32.
b is brought into contact with a contact pin (not shown) inserted from the outside so as to be electrically connected. A through hole 33 is formed in the upper surface of the ground terminal portion of the connector housing 31, and the contact terminal 32 is formed.
Another contact spring 32c connected to is inserted into the outer surface of the connector housing 31 so as to penetrate the through hole 33. The contact spring 32 protruding to the outside surface
c contacts the upper metal panel 25 in FIG. 4 to form a conductive path. Connection terminals 32d, 3 formed integrally with the contact terminals 32, 34 and led out of the connector
4d is connected to the wiring board 21 in FIG. 4 by soldering or the like.

In this embodiment, the spring 28 for conducting the upper metal panel 25 and the lower metal panel 26 is held by a part of the frame 24 and the holder 29, but there is a space in the connector housing. In this case, as shown in FIGS. 6 and 7, a through hole for holding a spring may be provided in the connector housing.

In FIGS. 6 and 7, 41 is a wiring board, 4
2 is an electronic circuit component such as a memory IC, 43 is a connector, 4
5 is an upper metal panel, 46 is a lower metal panel, and 47 is a spring. FIG. 7 is a sectional view taken along the line BB of FIG. 6, and when the number of contact pin insertion ports 48 is small,
In this way, the through hole 49 for holding the spring 47 can be provided. In this case, since the mounting area of the wiring board 41 can be utilized to the maximum and the upper metal panel 25 and the lower metal panel 26 are electrically connected by the connector portion, external noise such as high voltage is grounded by the connector 43. Can be connected to the terminal at the shortest distance. In the above embodiment, the upper metal panel 25 is used.
A spring is used as a means for connecting between the lower metal panel 26 and the lower metal panel 26. However, the means for connecting is not limited to the spring, and may be a screw, a snap, or the like. Alternatively, the upper and lower portions of the electromagnetic shield plate may be integrally formed and bent before use. Further, in the case where the connector is a two-stage type and the ground terminals are in both the upper and lower stages, it goes without saying that a contact spring with the metal panel can be provided on the upper and lower surfaces of the connector as shown in FIG.

FIG. 8 is a third embodiment, which is a modification of the connector contact spring. Only the sectional view of the connector portion is shown, but the terminal arrangement of the connector is a one-stage type. FIG. 9 is a bottom view in which only the periphery of the ground terminal portion of this embodiment is enlarged, and FIG. 8 is a sectional view taken along the line CC of FIG. A sleeve-shaped contact terminal 52 is fitted in a connector housing 51 formed of an insulating material such as resin. The contact terminal 5
2 is made of an elastic material such as phosphor bronze, and has a contact spring 5
2a and 52b come into contact with a contact pin (not shown) inserted from the outside to establish electrical conduction. Another contact spring 52 connected to the contact terminal 52 from the rear surface of the connector housing 51.
c and 52d are drawn out, and are bent in the directions away from each other. The tip ends of the contact springs 52c and 52d project from the upper surface and the lower surface of the connector housing 51, respectively, and contact the upper metal panel (not shown) and the lower metal panel (not shown) similar to those in FIG. To form a conductive path. In this case, since the contact spring 52d jumps out toward the wiring board, it is advisable to make a relief such as a cut in the wiring board. A connection terminal 52e formed integrally with the contact terminal 52 and led out of the connector
Are connected to the wiring board 1 by soldering or the like as in FIG.

Although all of the above embodiments have been described with respect to the memory card as an example, the present invention is not limited to the memory card and can be applied to any IC card using an electromagnetic shield and a connector. Needless to say. Further, the electromagnetic shield plate is not limited to the metal panel, and may be any conductive substance such as a conductive resin plate.

[0020]

As described above, according to the present invention,
Since the electromagnetic shield plate and the ground terminal of the connector are connected via the contact spring provided in the connector section, the mounting area of the wiring board can be effectively utilized and external noise such as high voltage can be passed through the wiring board. Since it can be released to the ground terminal of the connector without having to do so, it is possible to provide an IC card that is resistant to electromagnetic interference.

[Brief description of drawings]

FIG. 1 is a sectional view of an IC card according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the connector according to the first embodiment of the present invention.

FIG. 3 is a top view of a main part of the connector according to the first embodiment of the present invention.

FIG. 4 is a sectional view of an IC card according to a second embodiment of the present invention.

FIG. 5 is a sectional view of a connector according to a second embodiment of the present invention.

FIG. 6 is a sectional view of an IC card according to a modification of the second embodiment of the present invention.

FIG. 7 is a sectional view of a connector according to a modification of the second embodiment of the present invention.

FIG. 8 is a sectional view of a connector according to a third embodiment of the present invention.

FIG. 9 is a bottom view of the essential parts of the connector according to the third embodiment of the present invention.

FIG. 10 is a sectional view of an IC card according to a conventional technique.

[Explanation of symbols]

 1 ... Wiring board 2 ... Electronic circuit component 3 ... Connector 4 ... Frame 5 ... Upper metal panel (electromagnetic shield plate) 6 ... Lower metal panel (electromagnetic shield plate) 7 ... Upper contact spring 8 ... Lower contact spring

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H01R 4/64 A 7354-5E 9/09 Z 6901-5E

Claims (4)

[Claims] 1. In an IC card having an electromagnetic shield plate and a connector for electrical connection to the outside, a contact spring, which is connected to the ground terminal of the connector and abuts on the electromagnetic shield plate, is connected to the ground terminal. An IC card characterized by being provided integrally. 2. The IC card according to claim 1, wherein the tip of the contact spring is provided so as to protrude from the upper surface and the lower surface of the housing of the connector and contact the electromagnetic shield plate. 3. The electromagnetic device which is provided so that a tip of the contact spring projects on an upper surface or a lower surface of a housing of the connector and abuts on the electromagnetic shield plate, and holds the upper surface and the lower surface of the housing of the connector. 2. The IC card according to claim 1, wherein the shield plate is electrically connected by a conductive means. 4. The IC card according to claim 3, wherein the conducting means is provided in a through hole that penetrates an upper surface and a lower surface of the housing of the connector.