JP2003263621A - Electronic card and connector to be used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly reliable electronic card capable of facilitating certain coutermeasures to static electricity. <P>SOLUTION: This electronic card is provided with a printed board 1 on which an electronic component 2 is mounted, a connector 3 mounted on the printed board 1 wherein the prescribed number of connector pins are arrayed in a connector frame 9, and a ground pin 10 of those connector pins is connected to the ground pattern of the printed board 1, and two conductive boards 4 and 6 disposed so as to be butted to the both upper and lower faces of the connector frame 9. While those two conductive boards 4 and 6 are arranged so as to be butted to the both upper and lower faces of the connector frame 9, a protruding piece 10a protruding from the connector frame 9 connected to the ground pin 10 to the upper direction is brought into contact with an upper conductive board 4, and a protruding piece 10a protruding from the connector frame 9 connected to the ground pin 10 to the lower direction is brought into contact with the lower conductive board 6. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic card such as a memory card, and more particularly to a structure for preventing static electricity of an electronic component such as an IC chip mounted on a printed circuit board.

[0002]

2. Description of the Related Art FIG. 5 is an exploded perspective view of a conventional memory card described in, for example, Patent Document 1 and Patent Document 2 described later. This memory card is of a two-piece type using a connector, 1 is a printed circuit board, 2 is an IC chip mounted on the printed circuit board 1,
Reference numeral 3 denotes a connector having 36 to 80 pins, which is attached to one end of the printed board 1.

Reference numeral 4 is a metal upper name plate whose periphery is framed by a resin frame 5, and 6 is also a metal lower name plate. The printed name board 4 is sandwiched between the upper name plate 4 and the lower name plate 6. A memory card is constructed. The frame 5 has a function of supporting the printed circuit board 1 and the connector 3.

By the way, in such a memory card, there is a possibility that the IC chip 2 mounted on the printed circuit board may be destroyed by the static electricity from the outside to lose the memory function, and it is necessary to take measures against static electricity.

Conventionally, as a countermeasure against this static electricity, a hole or a concave portion is provided in the ground terminal portion of the printed circuit board 1, and the coil spring 8 is projected from the upper and lower surfaces of the printed circuit board 1 into the hole or the concave portion. In this way, an electrostatic discharge mechanism is adopted in which the upper and lower protruding portions of the coil spring 8 are elastically contacted with the upper name plate 4 and the lower name plate 6 by being mounted in this manner.

[0006]

[Patent Document 1] Japanese Patent Laid-Open No. 61-258798

[0007]

[Patent Document 2] Japanese Unexamined Patent Publication No. 4-10295

[0008]

[Patent Document 3] Japanese Unexamined Patent Publication No. 5-282507

[0009]

[Patent Document 4] Japanese Unexamined Patent Publication No. 4-153096

[0010]

[Patent Document 5] JP-A-5-221191

[0011]

However, in the above-mentioned conventional device, (1) the coil spring must be provided, the number of parts increases, and the assembling work becomes complicated.
(2) The coil springs are entangled with each other during the assembly process, which is an obstacle during automatic loading. (3) The coil spring is easily separated from the printed circuit board (especially in the case of a recessed portion),
(4) The coil spring is crushed (deformed) and the contact with the nameplate is apt to be uncertain, which is a drawback.

In order to eliminate such a drawback, conventionally, an IC card as described in the above-mentioned Patent Document 3, for example, has been proposed prior to the present invention. 6 and 7 are views for explaining the IC card, FIG. 6 is a partially exploded perspective view of the IC card, and FIG. 7 is a sectional view of the IC card.

As shown in FIG. 7, this IC card is provided with a frame 100, a pair of metal name plates 101 and 102 for sandwiching the frame 100, and IC chips 103 which are arranged apart from each other between the name plates 101 and 102. It is mainly composed of a printed circuit board 104 on which the above components are mounted and a connector 106 provided with a large number of connection terminals 105 arranged on the front side of the printed circuit board 104.

Of the many connecting terminals 105, the four connecting terminals 105 located on both sides form an extension portion 105a extending in the direction of the printed circuit board 104.
a is curved so as to face each other, and
The ground patterns 107 formed on both upper and lower surfaces of
(See FIG. 6), and is electrically connected to the ground pattern 107.

The other connection terminals 108 forming a pair with these four connection terminals 105 are the upper and lower nameplates 101 and 10, respectively.
Extensions 1 extending in the direction of 2 and curved in the vertical direction, respectively
When the IC card is assembled, the IC card 08a is brought into contact with the inner surfaces of the nameplates 101 and 102 as shown in FIG.
01 and 102 are electrically connected.

Therefore, when this IC card is inserted into the card reader / writer, the connector pin on the reader / writer side is inserted between the pair of upper and lower connection terminals 105 and 108 and contacts both. Therefore, the nameplates 101 and 102 are electrically connected to the ground pattern 107 via the connection terminal 108, the connector pin, and the connection terminal 105 to take measures against static electricity.

However, as is apparent from FIG. 6, in this IC card, the extension portion 108a of the connection terminal 108 is outside the connection terminal 105 and extends from the rear end of the connector 106 in a free and unstable state, and thus in the vertical direction. Is curved.
Therefore, when the IC card is being assembled, the extension 10
8a comes into contact with other members, or the extension 108a
Entanglement may result in excessive inward bends or diagonal lateral bends.

If the extension 108a is excessively bent inward and incorporated in an IC card, the nameplates 101 and 102 may not be contacted or the contact may become unstable, and the reliability of the countermeasure against static electricity may be deteriorated. This contact failure is
Even if the extension portion 108a is not excessively bent before being assembled, when the extension portion 108a is pressed and deformed by the nameplates 101 and 102, the extension portion 108a is free and the pressing deformation is not controlled by anyone. Bending may result in poor contact.

If the extension portion 108a is bent obliquely laterally, the extension portion 108a comes into contact with another connection terminal 105 and causes various troubles. This contact accident occurs more remarkably when the number of the connection terminals 105 in the connector 106 increases and the pitch between the connection terminals 105 becomes narrower.

Further, when the extension 108a is bent in the lateral direction, the extension 108a is attached to the name plate 101,
When it is pressed and deformed by 102, its tip comes into contact with the conductive pattern or electronic component on the printed circuit board 104, causing various troubles. In this contact accident, especially as the IC card becomes thinner, the printed circuit board 104 and the extension 108a
If the interval is narrow, it is particularly likely to occur. This impedes the increase in the number of pins of the connector 106 and the thinning of the IC card.

Further, an extension portion 105a of each connection terminal 105
When soldering the printed circuit board 104, the extension 1
Since the extension portion 108a is located in the vicinity of 05a, the extension portion 108a becomes an obstacle during soldering, resulting in a decrease in work efficiency. In order to solve this, the extension portion 108a is further extended to the inside of the printed circuit board 104.
It has a drawback that it is not preferable because the mounting area of other electronic components and conductive patterns is reduced.

Other applications related to this are, for example, the above-mentioned Patent Documents 4 and 5, and the IC cards according to these proposals have the same drawbacks as described above.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a highly reliable electronic card which can take reliable measures against static electricity and a connector used therefor.

[0024]

To achieve the above object, the first means of the present invention is, for example, a printed board on which electronic parts including a memory element (IC chip) and the like are mounted, and a predetermined number in a connector frame. Connector pins are arranged and attached to the printed circuit board, and a ground pin of the connector pins is connected to a ground pattern of the printed circuit board, and two pieces are arranged in contact with the upper and lower surfaces of the connector frame. In an electronic card provided with a conductive plate such as a thin metal plate (name plate), the connector frame connected to the ground pin in a state where the two conductive plates are arranged in contact with the upper and lower surfaces of the connector frame. The protruding piece protruding upward contacts the upper conductive plate and moves downward from the connector frame connected to the ground pin. Protruding piece that protrudes into the direction is characterized in that in contact with the lower conductive plate.

A second means of the present invention is a connector comprising a connector frame and a predetermined number of connector pins arranged in the connector frame, wherein a ground pin among the connector pins is upwardly moved from the connector frame. And a protruding piece protruding downward from the connector frame.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a memory card according to an embodiment, FIG. 2 is an enlarged vertical sectional view of a main part of the memory card, FIG. 3 is an enlarged perspective view of a connector pin used in the memory card, and FIG. 4 is the memory card. FIG. 3 is an enlarged perspective view of a main part of FIG.

The connector frame 9 of the connector 3 is joined to the printed circuit board 1 as shown in FIGS. 1 and 4, and the printed circuit board side end portion 9d of the connector frame 9 and the opposite side of the printed circuit board side end portion 9d. End 9e
Through-holes 9a are formed in a region 9f between and, and above and below a portion of the connector pin corresponding to the ground pin 10. From this through hole 9a, the ground pin 10
The projecting pieces 10a formed above and below partially project from the outer surface 9c of the connector frame 9, and as shown in FIG. 4, both root side ends 10b, 10b of the projecting piece 10a are formed on both side walls 9b of the through hole 9a. And 9b, respectively.
Further, in FIG. 3, 10b is a locking piece for preventing the ground pin 10 from coming off in the connector frame 9.

Accordingly, when the connector frame 9 is sandwiched between the upper name plate 4 and the lower name plate 6, the protruding piece 10a is pressed and deformed by the upper name plate 4 and the lower name plate 6 into the through hole 9a to elastically move upward. Since the nameplate 4 and the lower nameplate 6 are in contact with each other, static electricity from the outside flows from the ground pin 10 to both the nameplates 4 and 6, and a reliable countermeasure against static electricity is taken.

Even if only one of the nameplates 4 and 6 is made of metal and the through hole 9a and the protruding piece 10a are formed only on that side, the same effect can be obtained. When the connector has a plurality of ground pins, it is not necessary to project the projecting pieces up and down, and it is possible to project one projecting piece of the ground pin upward and the other projecting ground pin downward.

[0030]

As described above, according to the present invention, the spring is eliminated, and the static electricity from the outside world is generated through the protruding piece protruding upward from the connector frame provided on the ground pin and the protruding piece protruding downward. Since it is made to flow directly to the outer conductive plate, it is possible to take reliable measures against static electricity and improve reliability.

[Brief description of drawings]

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

FIG. 2 is an enlarged vertical sectional view of a main part of the memory card.

FIG. 3 is an enlarged perspective view of a connector pin used for the memory card.

FIG. 4 is an enlarged perspective view of a main part of the memory card.

FIG. 5 is an exploded perspective view of a memory card according to a conventional example.

FIG. 6 is a partially exploded perspective view of a conventionally proposed IC card.

FIG. 7 is a sectional view of the IC card.

[Explanation of symbols]

1 printed circuit board 2 IC chips 3 connectors 4 Upper nameplate 4a protrusion 5 frames 6 Lower nameplate 6a protrusion 9 Connector frame 9a through hole 9b Side wall of through hole 9c Outer surface of connector frame 9d Printed circuit board side edge 9e Opposite end 10 ground pins 10a protruding piece 10b Root end of protruding piece

Claims (2)

[Claims] 1. A printed circuit board on which an electronic component is mounted, and a predetermined number of connector pins are arranged in a connector frame and mounted on the printed circuit board, and the ground pin of the connector pins is a ground pattern of the printed circuit board. The connected connector and the connector frame that is placed in contact with the upper and lower surfaces of the connector frame.
An electronic card including a plurality of conductive plates, wherein the two conductive plates are arranged in contact with the upper and lower surfaces of the connector frame, and a protruding piece protruding upward from the connector frame connected to the ground pin. Is in contact with the upper conductive plate, and a protruding piece protruding downward from the connector frame connected to the ground pin is in contact with the lower conductive plate. 2. A connector comprising a connector frame and a predetermined number of connector pins arranged in the connector frame, wherein a ground pin of the connector pins includes a protruding piece protruding upward from the connector frame. A connector characterized in that a protruding piece protruding downward from the connector frame is formed.