JPH05325535A - Memory card - Google Patents

Abstract

PURPOSE:To surely escape static electricity to metallic sheets and to make it possible to meet the static electricity with high reliability by electrically connecting a grounding pin and the metallic sheets through the through-holes formed in the parts of a connector frame. CONSTITUTION:The through-holes 9a are formed at the top and bottom of the point of the connector frame 9 of a connector 3, which point corresponds to the grounding pin 10. Projecting pieces 10a formed at the top and bottom of the pin 10 are partly projected from the holes 9a. Then, the projecting pieces 10a come into contact with name plates 4 and 6 when a printed circuit board 1 held between the upper name plate 4 and the lower name plate 6 and, therefore, the static electricity from the outside flows from the pin 10 to the name plates 4, 6 and a sure measure to meet static electricity is attained. As a result, a highly reliable memory card is obtd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a memory card,
More specifically, the present invention relates to a static electricity countermeasure structure of a memory element 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.

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, and 3 is 36-.
It is a connector having 80 pins and 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 also 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 and the memory function may be lost. Therefore, 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, respectively. In this way, an electrostatic discharge mechanism is adopted in which the upper and lower protruding parts 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.

[0007]

However, in the above-mentioned conventional device, (1) the coil spring must be provided to increase the number of parts, and (2) the coil springs are entangled with each other during the assembling process, so It becomes an obstacle, (3) the coil spring is easily disengaged from the printed circuit board (especially in the case of a recessed portion), (4) the coil spring is crushed (deformed), and contact with the nameplate is apt to be uncertain. There was a flaw.

It is an object of the present invention to provide a memory card which solves the above-mentioned drawbacks of conventional products and has a highly reliable countermeasure against static electricity.

[0009]

The above object is to provide a printed circuit board on which a memory element is mounted, a connector in which a predetermined number of connector pins are arranged in a connector frame, and which is connected to the printed circuit board, and the printed circuit board and the connector. In a memory card provided with a support frame for supporting and a metal thin plate arranged on at least one of the upper and lower surfaces of the support frame, the portion of the connector frame corresponding to the ground pin of the connector pins. This is achieved by forming a through hole in the, and electrically connecting the ground pin and the metal thin plate through the through hole.

[0010]

[Function] The ground pin and the metal thin plate (name plate) are electrically connected through the through hole formed in the connector frame portion corresponding to the ground pin of the connector pins, so that static electricity can be reliably discharged. Can be released to a thin metal plate.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. The same parts as those in the conventional example are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 1 is an exploded perspective view of a memory card according to the first embodiment, FIG. 2 is a vertical sectional view of its portion A, and FIG. 3 is a perspective view of a connector pin.

Through holes 9a are formed in the connector frame 9 of the connector 3 above and below a portion of the connector pins corresponding to the ground pin 10, and the through holes 9a are formed.
From the protruding pieces 10a formed above and below the ground pin 10.
Is partly protruding. Further, in FIG. 3, 10b is a locking piece for preventing the ground pin 10 from coming off in the connector frame 9.

Therefore, when the printed circuit board 1 is sandwiched between the upper name plate 4 and the lower name plate 6, the protruding piece 10a becomes the upper name plate 4
Further, since it comes into contact with the lower nameplate 6, static electricity from the outside flows from the ground pin 10 to both nameplates 4 and 6, and a reliable countermeasure against static electricity is taken. Only one of the nameplates 4 and 6 is made of metal, and the through hole 9a and the protruding piece 1 are provided only on that side.
Even if 0a is formed, the same effect can be obtained. If the connector has a plurality of ground pins, it is not necessary to project the projecting pieces up and down, and the projecting pieces of the negative ground pin can project upward and the other ground pins can project downward.

FIG. 4 is a longitudinal sectional view of a connector portion according to the second embodiment, which corresponds to FIG.

This embodiment is the same as the first embodiment in that the through hole 9a is formed in the connector frame 9, but is different from the first embodiment in that the projecting piece is formed on the nameplate side. There is. Specifically, through holes 9a are formed above and below the connector frame 9, respectively.
The protrusion 4a formed on the upper nameplate 4 and the protrusion 6a formed on the lower nameplate 6 are fitted to a and are brought into contact with the ground pin 10. Even in such a configuration, the same effect as the above can be obtained. ..

In the above embodiment, the ground pin 10 is connected to both the upper name plate 4 and the lower name plate 6, but either or both of the upper name plate 4 and the lower name plate 6 are connected to the ground pin 10.
May be connected with.

[0018]

As described above, according to the present invention,
By eliminating the spring and using the through hole of the connector frame to allow static electricity from the outside to flow directly to the outer nameplate, it is possible to take reliable measures against static electricity, resulting in a highly reliable memory card. can do.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view of a portion A in FIG.

FIG. 3 is a perspective view of a ground pin.

FIG. 4 is a vertical sectional view of a connector portion of a memory card according to a second embodiment of the present invention.

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

[Explanation of symbols]

 1 printed circuit board 2 IC chip 3 connector 4 upper nameplate 4a protruding part 5 frame 6 lower nameplate 6a protruding part 9 connector frame 9a through hole 10 ground pin 10a protruding piece

Claims (1)

[Claims] 1. A printed circuit board on which a memory element is mounted, a connector having a predetermined number of connector pins arranged in a connector frame and connected to the printed circuit board, and a support frame for supporting the printed circuit board and the connector. In a memory card having a metal thin plate disposed on at least one of the lower and upper surfaces of the support frame, a through hole is formed in a portion of the connector frame corresponding to the ground pin of the connector pins, A memory card in which a ground pin and the thin metal plate are electrically connected through a through hole.