JPS639586A - Memory card - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a memory card called an IC card that has a built-in IC (integrated circuit), and particularly relates to a memory card that has a built-in IC (integrated circuit).
The present invention relates to a memory card incorporating an IC having a memory element such as M and a control element such as 09.

(Prior Art) Recently, it has been developed to incorporate an IC having a memory element such as ROM or RAM and a control element such as 09 ports, and to be electrically connected to each terminal of this IC and electrically connected to an external device. An IC card has been developed in which a plurality of contact terminals are exposed on the surface.

This type of IC card has contact terminals arranged in two rows in a staggered manner.
In other words, the contact terminal group in the first row and the contact terminal group in the second row are arranged in a staggered manner, for example, the contact terminal group in the first row is provided with a contact terminal for power supply, and the contact terminal group in the second row is A contact terminal for grounding is provided in the contact terminal group.

However, when the contact terminals in the first row and the contact terminals in the second row contact the connector of the external device, the contact terminals in the first row first come into contact with the connector, and then the contact terminals in the second row contact each other, and then After a delay, the contact terminal group in the second row comes into contact with the connector. Therefore, only the power supply contact terminals in the first row are in contact with the connector, that is, the ground phase contact terminals are floating.
In this case, the operating state of the IC is not compensated for, and the IC may be damaged.

(Problems to be Solved by the Invention) As described above, when the contact terminals for power supply and the contact terminals for grounding are provided separately in the first and second rows, the contact terminals for grounding are It may float and the IC may be damaged.

Therefore, the present invention is intended to eliminate the above-mentioned drawbacks, and is capable of ensuring that the power supply contact terminal and the grounding contact terminal are in contact with the connector at the same time, and that the grounding contact terminal is not in contact with the connector. It is an object of the present invention to provide a memory card that can prevent internal ICs from being destroyed.

[Structure of the Invention] (Means for Solving the Problems) A memory card of the present invention incorporates at least one integrated circuit, is electrically connected to each terminal of the integrated circuit, and is connected to an external device. A plurality of contact terminals are provided in at least two rows in a staggered manner for electrical connection with the external device, and the power supply contact terminal and The structure is such that a grounding contact terminal is provided.

(Function) As a result, when each contact terminal is brought into contact with the connector of the external device, the *Fukagawa contact terminal and the grounding contact terminal are always brought into contact with the connector at the same time.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

5 and 6 show an IC card as an example of a memory card according to the present invention. That is, 1 is a card main body, which includes an IC 2 having a memory element such as ROM or RAM, and an IC 3 having a memory element similar to the above or a control m+ element such as 08 ports. IC2 for
, 3, and a contact portion 4 consisting of a plurality of contact terminals for electrically connecting to an external device is provided exposed on the surface. Reference numeral 5 designates the entire cover, which has a predetermined gap (a gap corresponding to the thickness of the protective cover 6 described later) with respect to the surface of the card body 1, and is provided so as to cover the entire surface excluding the contact portion 4. It is being Note that the entire cover 5 may be formed integrally with the card body 1 or may be formed separately.

A non-conductive plate-shaped protective cover 6, for example, is provided between the card body 1 and the overall cover 5 so as to be freely stratified in the direction of the arrow a in the figure. When the IC card is not used, the protective cover 6 is positioned to cover the contact portion 4 as shown in FIG. 5 to protect the contact portion 4 from the external environment, and when the IC card is used, the protective cover 6 As shown in the figure, the contact portion 4 is moved to a position where it is exposed. That is, a spring 7 whose one end is fixed to the card body 1 and the other end is fixed to the rear end of the protective cover 6 is provided inside the overall cover 5, and the action of this spring 7 causes the protective cover 6 to move forward. It is maintained in the state shown in Figure 5. In this state, by sliding the protective cover 6 in the direction of the arrow shown in the figure against the force of the spring 7, the protective cover 6 can move as shown in FIG. 6 to expose the contact portion 4. There is.

Convex portions 8.8 are formed on both sides of the front end of the card body 1, and concave portions 9, 9 into which the convex portions 8, 8 fall when the protective cover 6 is in the position shown in FIG. They are formed on both sides of the tip of the protective cover 6, respectively. As a result, when the Pi IC card is not in use, the protective cover 6 is maintained in the state shown in FIG. 5 and is prevented from sliding freely.

Step portions 10.1 are provided on both sides of the tip of the protective cover 6, respectively.
0 is formed. The stepped portion 10.10 comes into contact with a protrusion (not shown) provided at a predetermined position in the card insertion slot (not shown) when the IC card is inserted into the card insertion slot (not shown) of an external device. There is. That is, when the IC card in the state shown in FIG. 5 is inserted into the card insertion slot, when it advances to a predetermined position, the stepped portion 10.10 of the protective cover 6 comes into contact with the protrusion in the card insertion slot, and the IC card is inserted into the card insertion slot. By pushing in the IC card, the protrusions 8.8 of the card body 1 escape from the recesses 9, 9 of the protective cover 6, the protective cover 6 slides in the direction of the arrow, and the contact portions 4 on the card body 1 is exposed. When the IC card advances to a predetermined position, a spring terminal (not shown) provided in the card insertion slot comes into contact with a contact portion 4 on the card body 1.

When the IC card is pulled out after use, when the IC card is pulled out to a predetermined position, the stepped portion 10゜1o of the protective cover 6 is released from contacting the convex portion in the card insertion slot, and the IC card is removed.
When the C card is pulled out, the protective cover 6 automatically returns to its original position by the action of the spring 7 and closes the contact portion 4.
At this time, the protrusions 8, 8 of the card body 1 fall into the recesses 9, 9 of the protective cover 6. Therefore, the IC card is pulled out from the card insertion slot with the protective cover 6 covering the contact portion 4 (the state shown in FIG. 5).

As shown in FIGS. 1, 2, and 3, the contact section 4 includes a first row of contact terminal groups 4a, which are first contacted by the connector group 20a in the connect section 20 of the external device; 1st
The second row of contact terminals 4b is contacted by the connector group 20b in the connector 20 of the external device from the rear of the row.

The contact terminal group 4a includes one contact terminal 11a to 11S.
The contact terminal group 4b is composed of 19 contact terminals 128 to 12s, and these contact terminals 11a to 115 and 12a to 125 are arranged in a staggered manner.

The connector group 20a is composed of 19 connectors 21, . . . corresponding to the contact terminals 118 to 11S,
The connector group 20b is composed of 19 connectors 22, . . . corresponding to the contact terminals 12a to 12s. One end, that is, the connector 21... which contact starting part 111 is a straight line, and the other end 112 is configured on a circular arc, and the contact terminals 12a to 128, as shown in FIG. 4(b), One end, that is, the connector 22, . . . which contact starting portion 121 and the other end 122 are both formed in an arc shape.

As a result, the first row side of the contact terminals 12a to 12S in the second row has an arc shape (projection shape).

Therefore, as in the conventional case, the contact terminals 12a to 12s
Compared to the case where the other end, that is, the end on the contact terminals 118 to 11S side, is a straight line, the contact range of the connectors 22, . . . can be expanded without narrowing the insulation distance.

As a result, the contact terminals 12a to 12S and the connector 2
2. Which contact can be improved? As a result, damage to the IC due to floating of the grounding contact terminal can be prevented, and the memory card can operate reliably.

Further, the contact terminal 11a is for the write power (+24V) for the IC2, the contact terminals 11b to 11j are for the address line, and the contact terminals 11k, 111 are for the address line.
and 11n to 11r are for the data line of IC2, the contact terminal 11m is for grounding, and the contact terminal 1
1S is a write power supply (+24V) for IC3.

Roughly speaking, the contact terminal 12a is for the data line of the IC2, the contact terminals 12b, 12d to 12h are for the address line, the contact terminal 12C is for the output enable signal, and the contact terminal 121 is for the chip. The contact terminal 12j is for the operating power supply (+5V), the contact terminal 12r is for grounding, and the contact terminals 12 to 12Q and 12S are for the data line of the IC3.

The two contact terminals 11m for grounding improve safety.

As mentioned above, since the contact terminals for power supply and the contact terminal for grounding are present in the first row of contact terminal group 4a,
Make sure that the power contact terminal is in contact with the connector.
A contact terminal for grounding also makes contact with the connector. As a result, M
When the contact terminal for 8 is connected to the connector cover, damage to the IC due to floating of the grounding contact terminal can be prevented, and operation as a memory card can be reliably performed.

[Effects of the Invention] As detailed above, according to the present invention, the power supply contact terminal and the grounding contact terminal can always contact the connector at the same time, and the grounding contact terminal can contact the connector without contacting the connector. By doing so, it is possible to provide a memory card that can prevent the internal IC from being destroyed.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view of the main parts, FIG. 3 is a diagram for explaining the structure of the contact terminal and the structure of the connection part, and FIGS. 2 and 4. 5 is a diagram for explaining the structure of a contact terminal, and FIGS. 5 and 6 are overall perspective views with the protective cover in a different position. DESCRIPTION OF SYMBOLS 1...Card body, 2, 3...Ic, 4...Contact part, 4a...1st row contact terminal group, 4b...2nd
Contact terminal group in row, 5... Entire cover, 6... Protective cover, 11a to 11s, 12a to 12s-
...Contact terminal, 111... One end of the contact terminals 118 to 11S, 112... Other end of the contact terminal, 11a to 11S, 121... One end of the contact terminals 128 to 12s, 1
22...Contact terminal, other end of 128-12s. - Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 5 Figure 6

Claims (1)

[Claims] Contains at least one integrated circuit, is electrically connected to each terminal of the integrated circuit, and has a plurality of contact terminals arranged in a staggered manner for electrically connecting to an external device. A memory card provided in at least two rows, characterized in that a power supply contact terminal and a grounding contact terminal are provided on the contact terminal group side of the first row that contacts the external device first.