JPH04336297A - Recording medium card - Google Patents

Abstract

PURPOSE:To protect a storage medium card against any static failure in an effective manner. CONSTITUTION:The subject recording medium card consists of a hybrid functional circuit board 2, a connector 3 connected to the I/O terminal of the board 2, metal plates 9a, 9b, arranged on both surfaces of the board 2, an insulating frame 5 which incorporates the board 2 with the connector 3 and maintains both metal plates 9a, 9b isolated from the other, the first grounding conductor 9c which grounds a space between both metal plates 9a, 9b and the second grounding conductor 10 which grounds the grounding terminal of the hybrid functional circuit board 2 to one metal plate 9a. The metal plates 9a, 9b are connected to the other at least, partly in the U or H cross-section to form the first grounding conductor 9c.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium card such as a memory card, and more particularly to a recording medium card that effectively prevents electrostatic disturbances such as malfunctions.

0003

2. Description of the Related Art Recording medium cards such as memory cards and IC cards have come into widespread use on a daily basis as various electronic devices have been developed and put into practical use. On the other hand, with the development and practical use of electronic devices, electrostatic interference and electromagnetic wave interference have become a new problem, and this type of recording medium card has also become a problem. As a countermeasure against such electrostatic disturbances, it is known to construct a memory card as shown in cross section in FIG. 5, for example. That is, a functional hybrid circuit board 2 configured by mounting electronic components 1 such as active elements and passive elements, and a connector 3 disposed on one end side of the functional hybrid circuit board 2 and electrically connected to input/output terminals. , metal plates 4a and 4b respectively disposed on both sides of the functional hybrid circuit board 2, and an insulating material that houses the functional hybrid circuit board 2 together with the connector 3 and maintains separation between the metal plates 4a and 4b. Frame 5 and
Both metal plates 4 are placed on the opposite side from the position where the connector 3 is arranged.
a, 4b, and a second ground conductor, such as a compression coil spring 7, that grounds the ground terminal of the functional hybrid circuit board 2 to one metal plate 4a. A memory card has been developed. In FIG. 5, reference numeral 8 indicates an adhesive layer for bonding and integrating the metal plates 4a and 4b provided on both sides of the functional hybrid circuit board 2, respectively.

[0004] According to the above configuration, due to the conduction between the metal plates 4a and 4b and between the functional hybrid circuit board 2 and the metal plate 4a,
The circuit components 1 of the functional hybrid circuit board 2 can be easily protected from electrostatic interference.

[0005]

[Problems to be Solved by the Invention] However, the above configuration, that is, the compression coil spring 6 that grounds both metal plates 4a and 4b, which contributes to protection from electrostatic interference, and the functional hybrid circuit There is a problem that the compression coil spring 7 that grounds the ground terminal of the plate 2 to one of the metal plates 4a causes a reduction in the protective function against static electricity or the like, or does not play a sufficient role due to so-called spring contact resistance. That is, in the above configuration, if the compression coil springs 6 and 7 as ground conductors are selected to have high elasticity, the metal plate 4a against the functional hybrid circuit board 2 surface
, 4b becomes difficult to maintain adhesive integrity. On the other hand, if a material with low elasticity is selected, poor contact may occur, and the protective function against static electricity etc. cannot be sufficiently achieved.

The present invention has been made in response to the above-mentioned circumstances, and aims to provide a storage medium card that can effectively prevent electrostatic damage and can always perform the required normal functions. [Structure of the invention]

[0007]

[Means for Solving the Problems] A recording medium card according to the present invention includes a functional hybrid circuit board, a connector electrically connected to an input/output terminal of the functional hybrid circuit board, and a connector that electrically connects to an input/output terminal of the functional hybrid circuit board. metal plates arranged on both sides, an insulating frame that houses a functional hybrid circuit board together with the connector and maintains separation between the two metal plates, and a first ground that grounds the two metal plates. In a recording medium card comprising a conductor and a second ground conductor that grounds a ground terminal of the functional hybrid circuit board to one metal plate, the metal plate has a U-shaped cross section at least in part. Alternatively, the first ground conductor is formed by being connected in an E-shape.

[0008]

[Function] As mentioned above, it is integrally arranged on both main surfaces,
By connecting the metal plates involved in electrostatic protection function and mechanical protection function in a U-shaped or E-shaped cross section and serving as the first grounding conductor, the mechanical contact is reduced. In other words, it is possible to reduce the contact resistance value, thereby strengthening the protection function against static electricity, etc., and also significantly improving the sustainability of the protection function against static electricity, improving the reliability of the storage medium card.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 showing an example of the structure of a memory card.

FIG. 1 is a cross-sectional view showing the main structure of a memory card according to the present invention, which includes a functional hybrid circuit board 2 on which electronic components 1 such as active elements and passive elements are mounted.
, a connector 3 disposed on one end side of the functional hybrid circuit board 2 and electrically connected to the input/output terminal, and metal plates 9a and 9b disposed on both sides of the functional hybrid circuit board 2, respectively.
an insulating frame 5 that houses the functional hybrid circuit board 2 together with the connector 3 and maintains separation between the metal plates 9a and 9b;
It has a configuration that includes. That is, the recording medium card according to the present invention has the same basic configuration as the conventional case, but the metal plates 9a and 9b are provided in some places, for example, on the side opposite to the position where the connector 3 is disposed. At the position, the connection 9c is formed forming a U-shaped cross section, and this connection 9c
The main point is to provide the section with a function as a first grounding conductor for grounding between the metal plates 9a and 9b. FIG. 2 shows the metal plates 9a, 9b and a connection 9 that also serves as a first ground conductor.
This is a perspective view of the structure of part c.A metal plate cut to the required shape and dimensions is bent at approximately the center so that the cross section forms a U-shape, and this is used for static electricity protection or mechanical It was used as a protective panel. On the other hand, the second ground conductor 10 that is connected to the ground terminal of the functional hybrid circuit board 2 and one of the metal plates 9a is a compression coil spring as in the case shown in FIG. 5.

In this configuration example, at least the metal plate 9
Since there is no need for a component as the first ground conductor that grounds between the metal plate 9b and the metal plate 9b (reducing the number of components), not only is the complexity of assembly and configuration reduced; Compared to the compression coil spring (second ground conductor 1
0) is also reduced, so the uncertain elements are reduced accordingly, which improves the yield and also avoids the problem of electrostatic functional deterioration.

Next, another embodiment of the storage medium card according to the present invention will be described with reference to FIGS. 3 and 4. The basic configuration is the same as in the example above, so
Although the explanation is omitted, in the case of this embodiment, the metal plate 9a
, 9b are connected to each other in a U-shaped cross section at a position opposite to the position where the connector 3 is disposed, and a first grounding conductor is connected to this connection 9c to ground between the metal plates 9a and 9b. In addition to having a function, a cutout tongue piece 1 is provided on one metal plate 9a.
0 is formed, and this cutout tongue piece 10 forms a second ground conductor that is grounded to the ground terminal of the functional hybrid circuit board 2 and one metal plate 9a. Figure 4
is a perspective view showing the structure of the metal plates 9a, 9b, the connecting portion 9c which also serves as the first grounding conductor, and the second grounding conductor (cutout tongue) 10, which are cut into the required shape and dimensions. , and a metal plate with cutout tongues 10 provided at predetermined positions is bent approximately at the center so that the cross section forms a U-shape, and this is used as a panel for electrostatic protection or mechanical protection. are doing.

In the case of this configuration example, as a first ground conductor that grounds between the metal plate 9a and the metal plate 9b, and as a second ground conductor that grounds the functional hybrid circuit board 2 and the metal plate 9a, Separate parts are not required (reducing the number of parts), so
Not only is the complexity of assembly and configuration further reduced, but also the uncertainties are reduced, so the problem of electrostatic functional deterioration can be largely avoided or eliminated.

[0014]

[Effects of the Invention] As explained above, according to the storage medium card according to the present invention, it is possible to easily prevent static electricity damage in the storage medium card itself or in the system in which this storage medium card is installed. and can be effectively prevented. In other words, the configuration and arrangement of the grounding conductor is simplified, contact resistance is reduced, and stable functionality is achieved, providing excellent static electricity resistance and preventing malfunctions caused by static electricity disturbances. It is completely avoided and always maintains and exhibits the required function.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of the main part configuration of a storage medium card according to the present invention.

FIG. 2 is a perspective view showing a configuration example of a metal plate included in a storage medium card according to the present invention.

FIG. 3 is a sectional view showing another example of the configuration of main parts of the storage medium card according to the present invention.

FIG. 4 is a perspective view showing a configuration example of another metal plate included in the storage medium card according to the present invention.

FIG. 5 is a sectional view showing the main part configuration of a conventional storage medium card.

[Explanation of symbols]

1...Circuit components 2...Functional hybrid circuit board 3...
Connector 4a, 4b, 9a, 9b...metal plate
5... Insulating frame 6... First ground conductor 7, 10... Second ground conductor 8... Adhesive layer 9c... Metal plate connection part (also serves as the function of first ground conductor 6)

Claims (1)

[Claims] 1. A functional hybrid circuit board, a connector electrically connected to an input/output terminal of the functional hybrid circuit board, a metal plate respectively disposed on both sides of the functional hybrid circuit board, and functioning together with the connector. an insulating frame that houses a hybrid circuit board and maintains separation between the metal plates; a first ground conductor that grounds the metal plates; and a ground terminal of the functional hybrid circuit board that is connected to one metal plate. In a recording medium card comprising a second grounding conductor that is grounded, the metal plates are connected at least in part to form a U-shaped or E-shaped cross section, and the first grounding conductor is connected to the first grounding conductor. A recording medium card comprising: