JP2556239Y2 - IC card - Google Patents

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 for a data management device and the like, and more particularly, to a countermeasure against static electricity of an IC card.

[0002]

2. Description of the Related Art Generally, as a countermeasure against this kind of static electricity,
FIG. 3 and FIG. 4 show a structure disclosed in Japanese Patent Laid-Open No. 4-10295. Explaining this, the IC card 1 has a frame 2, a pair of metallic upper and lower protection members 3 and 4 sandwiching the frame 2, and a memory element disposed apart from the protection members 3 and 4. A printed circuit board 5 on which a semiconductor element 6 is mounted, and a connector 7 provided with a plurality of connection terminals 7a disposed on the front side of the printed circuit board 5 are schematically constituted. A pair of ground patterns 8 electrically connected to the ground pattern 7a are formed. On the other hand, through holes 11, 11 are formed in the frame 2 at positions corresponding to the ground patterns 8,
Coil springs 12, 12 are provided in the through holes 11, 11, respectively.
The ground pattern 8 is electrically connected to the protection members 3 and 4 via the coil springs 12 and 12.

FIG. 5 is a side sectional view showing another example of countermeasures against static electricity in a conventional IC card. In this second example, a through hole 11 is provided only on the lower side, and an electrical connection between the ground pattern of the printed circuit board 5 and the lower protective body 4 is made by a coil spring 12, and the rear ends of the protective bodies 3 and 4 are formed. The protection members 3 and 4 are electrically connected by fitting the claw portions 3e and 4e provided on the portions.

[0004]

[Problems to be solved by the present invention]
In the example, there is a disadvantage that the work of assembling other components such as the protection body by fitting the coil spring into the through-hole is complicated and troublesome, and the number of parts increases. In the second example, since the upper and lower protective members are electrically connected to each other behind the printed circuit board, static electricity flows to the semiconductor element side, which adversely affects the semiconductor element mounted on the printed circuit board. There is a problem. In addition, in both cases, the structure is such that only one of the left and right sides of the protective body is protected against static electricity. There is an inconvenience that a request cannot be easily fulfilled.

Accordingly, the present invention has been made in view of the above-mentioned conventional drawbacks, problems, and inconveniences, and aims at simplifying the structure, facilitating assembly, and protecting the upper and lower parts. An object of the present invention is to provide an IC card which has an economical countermeasure against static electricity by giving the body compatibility.

[0006]

In order to achieve this object, an IC card according to the present invention comprises a printed circuit board on which a semiconductor element is mounted, and a pair of metallic protection members provided so as to sandwich the printed circuit board. A connector provided on the front side of the printed circuit board having a body and connection terminals; and a pair of ground patterns formed on the front and back of the printed circuit board near the connector and electrically connected to the connection terminals of the connector. And a pair of recesses integrally formed from the pair of protective bodies and electrically connected to the ground pattern. In the IC card according to the present invention, two pairs of the ground patterns are formed at symmetric positions on the printed circuit board with the center line of the IC card along the insertion direction of the IC card as a symmetric line, and the ground patterns are electrically connected to the ground patterns. Two pairs of recesses are provided for connection.

[0007]

In the present invention, the recess is electrically connected to the ground pattern of the printed circuit board at the same time that the protective body is incorporated into the frame. In addition, ground pattern is IC
The center line of the IC card along the insertion direction of the card is formed as a symmetry line at two symmetric positions on the printed circuit board, and
Since two pairs of recesses electrically connected to these ground patterns are provided, both protectors have compatibility.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of the IC card according to the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG. In these figures, the same components as those of the prior art are denoted by the same reference numerals, and detailed description is omitted. The feature of the present invention is that the ground pattern 8 is formed near the connector 7 and the ground pattern 8 is symmetrical with respect to the center line C of the card 1 along the insertion direction A of the card 1 into the apparatus main body (not shown). Two pairs of lines are formed at symmetrical positions on the printed circuit board 5, and two pairs of dowel-shaped recesses 3 a, 4 a are integrally formed at both ends of the protective bodies 3, 4 on the connector 7 side corresponding to the ground patterns 9. The point is that the concave portions 3a, 4a are electrically connected to the ground patterns 8, 8, respectively.

As described above, the electrical connection between the ground pattern 8 and the protective bodies 3 and 4 is made by the recesses 3a and 4a formed integrally with the protective bodies 3 and 4, so that the number of parts is reduced and the number of parts is reduced. In addition, the assembling work becomes easy, and the ground pattern 8 is provided near the connector 7, so that the recess 3
a, 4a, the electrical connection position is closer to the connector 7 than the arrangement position of the semiconductor element 6, so that adverse effects on the semiconductor element 6 due to the static electricity can be eliminated.

Further, two pairs of ground patterns 8, 8 are provided with the center line C as a symmetrical line, and two pairs of recessed portions 3a, 4a are provided in the two protection members 3, 4 correspondingly. Compatibility arises between 3, 4 and, for example, the protector 3 can be used as the protector 4 as it is, even if a customer requests that the design of the protector 3 be printed on the protector 4. It can be easily handled without capital investment.

A pair of long groove-shaped recesses 3b, 4b along the card 1 insertion direction A are formed at both ends of the protective bodies 3, 4, respectively. By providing the recesses 3b, 4b, the card 1 is reinforced in strength. Further, the card 1 insertion direction A
Long groove-shaped recesses 3c, 4c are formed in a direction perpendicular to the direction. By providing the recesses 3c, 4c, the card 1 is reinforced in a strong manner, and at the time of insertion / removal of the card 1 into / from a device (not shown), it functions as a hook on a finger to prevent slipping. Operability is improved.

[0012]

As described above, according to the present invention, since the concave portion electrically connected to the ground pattern electrically connected to the connection terminal of the connector formed on the printed circuit board is formed integrally with the protective body, The number of parts is reduced and the assembly becomes easier. Further, since the ground pattern is formed in the vicinity of the connector, it is possible to prevent static electricity from flowing into the semiconductor element and eliminate the adverse effect of the static electricity on the semiconductor element.

In addition, two pairs of ground patterns are provided at symmetrical positions on the printed circuit board with the center line of the card along the card insertion direction as a symmetrical line, and two pairs of recesses are formed in both protectors. Therefore, it is only necessary to manufacture one kind of protective body, which makes it possible to reduce the manufacturing cost and to exchange the pattern printed on the protective body. It is possible to respond easily without investing, and it is also economical.

[Brief description of the drawings]

FIG. 1 is a plan view of an IC card according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a plan view of a conventional IC card.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a side sectional view of a second example of a conventional IC card.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 IC card 3 Protective body 3a concave part 4 Protective body 4a concave part 5 Printed circuit board 7 Connector 7a Connection terminal 8 Ground pattern

Claims (2)

(57) [Scope of request for utility model registration] A printed circuit board on which a semiconductor element is mounted;
A pair of metallic protectors disposed so as to sandwich the printed circuit board, a connector provided with connection terminals, disposed on the front side of the printed circuit board, and formed on the front and back of the printed circuit board near the connector. A pair of ground patterns electrically connected to the connection terminals of the connector, and a pair of recesses formed integrally from the pair of protection bodies and electrically connected to the ground pattern. IC card to do. 2. The IC card according to claim 1, wherein said ground pattern is formed along an IC card insertion direction.
I is characterized in that two pairs are formed at the symmetrical position of the printed circuit board with the center line of the C card as a symmetrical line, and two pairs of recesses are provided which are electrically connected to these ground patterns.
C card.