JPH0726141Y2 - IC memory card - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an IC memory card provided with measures against static electricity.

[Prior Art] Conventionally, an IC memory card, as shown in FIGS. 5 and 6, has two conductive plates 1 facing each other with a space therebetween.
The insulating frame 3 is provided along the periphery of these conductive plates 1. The conductive plate 1 and the frame 3 form a thin case 5. A connector 7 is sandwiched and fastened to one end of the case 5. A board 9 such as a printed circuit board forming an electric circuit is housed inside the case 5.

Further, the connector 7 has an insulator 11 and a plurality of conductive contacts 13 arranged in parallel with each other in a strip shape on the insulator 11. Here, the illustrated contact 13 is a socket contact.

By the way, in this IC memory card, there is no problem if the static electricity charged on the user's body escapes to the conductive plate 1. However, if static electricity flows to the contact 13 for some reason, there is a risk of destroying an IC (not shown) mounted on the internal substrate 9. Therefore, even if static electricity is generated, it is necessary to reliably flow the static electricity to the conductive plate 1.

In order to respond to such a request, measures are taken such as retracting the contact 13 from the end surface of the insulator 11 as much as possible, and bringing the end portion of the conductive plate 1 to the same position as the end surface of the insulator 11.

[Problems to be Solved by the Invention] However, when the contact 13 is retracted from the end face of the insulator 11, the contact portion of the contact is retracted inside the insulator 11. For this reason, the pin of the other side, that is, the device side pin header (not shown), which is connected to the contact 13 in a one-to-one relationship, is lengthened.
However, since the pin usually has a diameter of about 0.37 mm, if the pin has a long and slender structure, it may be bent due to a mounting error or the like, so that a defect is likely to occur.

In addition, it is difficult to bring the end portion of the conductive plate 1 to the same position as the end surface of the insulator 11 in terms of manufacturing, appearance and safety. As a result, there is a problem that the end portion of the conductive plate 1 has to be retracted from the end surface of the insulator 11 and arranged.

Therefore, an object of the present invention is to reliably discharge the static electricity that has flowed to the IC memory card to the conductive plate and avoid the danger.

[Means for Solving the Problems] According to the present invention, a connector including an insulator and a conductive contact disposed on the insulator is included, and the connector is narrowed by an insulating frame and a conductive plate. In the IC memory card possessed by the present invention, there is obtained an IC memory card characterized in that the insulator has a conductive film on a contact portion which comes into contact with the conductive plate.

[Embodiment] FIGS. 1 to 4 show an IC memory card according to an embodiment of the present invention. In this embodiment, also referring to FIG. 5 and FIG. 6, the same parts as those in the drawings will be designated by the same reference numerals and described.

Referring to the drawings, this IC memory card includes two plate-like conductive plates 1 facing each other, and an insulating frame 3 in which these conductive plates 1 are provided with a peripheral edge interposed therebetween. Have The conductive plate 1 is, for example, a metal plate that allows static electricity to flow easily. The conductive plate 1 and the frame 3 form a thin case 5 with them. A connector 7 is sandwiched and fastened to one end of the case 5. Inside the case 5, a substrate 9 (see FIGS. 5 and 6) such as a printed circuit board is accommodated.

The connector 7 is an insulator 11 and this insulator
11 has a plurality of contacts 13 arranged and supported side by side in the longitudinal direction. Each terminal of these contacts 13 is electrically connected to the circuit of the board 9.

Further, the insulator 11 is provided with a thin conductive coating 15 on the outer surface which is a contact portion which comes into contact with the conductive plate 1. The coating 15 is applied to the area of the meshed line portion shown in FIGS. 2 and 3.

Therefore, the conductive plates 1 are partially in contact with the coating film 15 formed on the contact surface of the insulator 11.
Therefore, static electricity flows from the coating film 15 to the conductive plate 1.

The coating 15 is formed by vacuum vapor deposition using, for example, aluminum. As an example,
Aluminum of about 2.5 microns is vapor-deposited on the outer surface of the insulator 11, that is, the contact surface. At this time, the fitting surface of the insulator 11 is masked in advance. As a result, it is possible to prevent the coating film 15 from adhering to the insertion port 19 formed in the insulator 11 for receiving the mating terminal.

Alternatively, the insulator 11 may be formed of a resin that can be plated, and may be formed by electroplating or by applying a conductive material.

[Effects of the Invention] As described above with reference to the embodiments, according to the IC memory card of the present invention, the conductive film on the outer surface of the insulator can surely discharge static electricity to the conductive plate. There is no such thing as destroying.

In addition, although the problem of radiation noise occurs with the increase in storage capacity, the presence of the conductive coating effectively acts on such a phenomenon.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an entire IC memory card according to an embodiment of the present invention, FIG. 2 is a plan view of a connector used in FIG. 1, and FIG. 3 is a side view of a second connector. 4, FIG. 4 is a front view of the connector of FIG. 2, FIG. 5 is a plan view of a conventional IC memory card, and FIG. 6 is a sectional side view of the IC memory card of FIG. 1; conductive plate, 3; frame, 5; case, 7; connector, 9; substrate, 11; insulator, 13; contact, 15; coating film.

Claims (1)

[Scope of utility model registration request] 1. An IC memory card comprising a connector having an insulator and a conductive contact arranged on the insulator, the connector being sandwiched between an insulating frame and a conductive plate. The IC memory card, wherein the insulator has a conductive film on a contact portion which comes into contact with the conductive plate.