JPH03247497A - Memory card - Google Patents

Abstract

PURPOSE:To effectively prevent the warpage of a card and to prevent the adhesion of dust or oils to the terminal part of a printed circuit board by providing an upper beam part between the upper surface opening and insertion opening of a card substrate and providing a lower beam part in the vicinity of the insertion opening to cover the upper surface opening with a sheet. CONSTITUTION:An upper beam part 11 is formed between upper surface openings 13 and an insertion opening 21, that is, to the upper end edge where the upper surface 16 and side end surfaces 15 of a card substrate 1 are bonded. Further, a lower beam part 12 is formed in the vicinity of the insertion opening 21, that is, at the oblique lower position opposed to the upper beam part 11. A printed circuit board 2 is inserted in the card substrate 1 from the under surface 17 thereof to be fixed to the substrate and a wide sheet 19 is bonded to the upper surface 16 of the card substrate 1 to simultaneously close all of the upper surface openings 13. By providing the upper beam part and the lower beam part in an opposed state, the end part of the card substrate is mechanically reinforced and, since the upper surface openings are covered with the sheet, no dust or oil is bonded and no contact inferiority is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a memory card that stores information in a semiconductor element built into a card body.

[Conventional technology]

FIG. 6 and FIG. 7 are diagrams for explaining a conventional memory card. The memory card is mainly composed of a card substrate 3 made of synthetic resin and a printed circuit board 4 that is inserted from below.

As shown in FIG. 6, near the end of the card board 3, a predetermined number of groove-shaped contact spaces 31 are arranged in parallel from the side end surface 32 to the top surface 33 thereof. 36 in the figure is a side wall for dividing the contact space 31, 34 is a pedestal,
35 is a through hole.

On the other hand, a predetermined number of terminal portions 41 are arranged in parallel near one end of the printed circuit board 4, and a semiconductor element (not shown) is mounted thereon. By fitting and assembling the printed board 4 from below the card board 3, the terminal portions 41 each face the contact space 31 through the through hole 35.

FIG. 5 shows a memory card inserted into the connector 5, and by inserting the tip of the memory card into the opening 52 of the connector 5, the cantilever connectors 51 enter the contact spaces 31, and the tips of the memory cards are inserted into the openings 52 of the connector 5. comes into contact with the terminal portion 41 of the printed circuit board 4.

[Problem to be solved by the invention]

By the way, as shown in FIG. 3, in a conventional memory card, the contact space 31 of the card board 3 has a continuous opening from the top surface 33 to the side end surface 32, and is in the form of a groove-shaped cut. It has become. Furthermore, since this groove-shaped cut continues over almost the entire length of the card substrate 30 in the width direction, the mechanical strength of the card substrate 3 in the width direction is weak and easily bends.

When a memory card is bent, the conductive pattern on the printed circuit board may be peeled off from the substrate, the semiconductor element and the printed circuit board may become disconnected, and in severe cases, the semiconductor element may be damaged.

Further, the upper surface of the contact space 31 is opened, and as a result, the terminal portion 41 is exposed. Therefore, there is a fear that dust and oil may adhere to the terminal portion 41, resulting in poor contact at the terminal portion.

The purpose of the present invention is to eliminate such drawbacks of the prior art,
An object of the present invention is to provide a memory card with high operational reliability.

[Means to solve the problem]

In order to achieve the above object, the present invention includes: a printed circuit board on which a semiconductor element is mounted and a predetermined number of terminals arranged in parallel near one end; and a wide recess into which the printed circuit board is inserted on the lower surface side. and a card board in which a predetermined number of hollow contact spaces communicating with the recess are arranged in parallel near one end thereof, and the printed circuit board is fitted into the recess of the card board,
In a memory card in which the terminal portions of the printed circuit board face the contact spaces of the card board, the top surface of the card board has a top opening that communicates with the contact space, and the side end surface of the card board has an insertion opening that communicates with the contact space. , respectively, an upper beam portion is provided between the upper surface opening and the insertion opening, a lower beam portion is provided near the insertion opening, and each upper surface opening is covered with a sheet.

[Effect]

As described above, the present invention provides an upper beam portion between the upper surface opening of the card board and the insertion opening, that is, at the upper edge where the upper surface and the side end surface of the card board join, and near the insertion opening, that is, the upper beam portion. By providing the lower beam at a position facing the
The mechanical strength near the edge of the card substrate is increased, and the conventional bending of the memory card can be effectively prevented.

In addition, since the upper surface opening is covered with the sheet, dust, oil, etc. do not adhere to the terminal portion of the printed circuit board, and poor contact at the terminal portion can be improved.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Figures 1 to 5 are for explaining the present invention in detail. Figure 1 is a plan view of the memory card, Figure 2 is a sectional view of the memory card, and Figure 3 is a perspective view of the main parts of the card board. FIG. 4 is a sectional view of the card board, and FIG. 5 is a sectional view of main parts showing a state in which a memory card is inserted into a connector.

As shown in FIG. 2, the memory card 10 is mainly composed of a card substrate 1 molded from synthetic resin, a printed circuit board 2, and a sheet 19 made of a synthetic resin sheet or a thin metal plate.

As shown in FIGS. 3 and 4, the card board 1 has contact spaces 14 formed near one end thereof corresponding to the number of terminal portions 22 of the printed circuit board 2. As shown in FIGS. The upper surface 16 of the card substrate 1 has an upper opening 13 communicating with the contact space 14, and the side end surface 15 of the card substrate 1 has an insertion opening 2 communicating with the contact space 14.
1 are formed respectively.

An upper beam portion 11 is formed between the upper surface opening 13 and the insertion opening 21, that is, at the upper edge where the upper surface 16 and the side end surface 15 of the card board l are joined.

Further, a lower beam portion 12 is formed in the vicinity of the insertion opening 21, that is, at a diagonally downward position opposite to the upper beam portion 11.

This lower beam portion 12 is connected to the cantilever connector 61 (fifth
An inclined surface 122 is formed to allow smooth insertion of the (see figure). Furthermore, the upper end 12 of this inclined surface 122
1 is a printed circuit board 2 as shown in FIGS. 2 and 5.
It is slightly higher than the top surface of the connector 6, and works together with the cantilever connector 61 to provide a click feeling when the memory card 10 is inserted into the connector 6.

As shown in FIG. 4, the upper beam portion 11 and the lower beam portion 12 are arranged so as not to overlap in the vertical direction. This is because the molding die for molding the card substrate 1 is divided into two molds, and the upper surface opening 13 is used as an escape hole for the mold portion for molding the lower beam portion 12.

Further, as shown in FIG. 4, the lower surface 17 of the card board 1 is provided with a wide recess 24 into which the printed circuit board 2 is fitted, and an element housing section 18 which accommodates various semiconductor elements 23 mounted on the printed circuit board 2. It is being As shown in FIG. 2, the printed circuit board 2 is inserted and fixed from the bottom surface 17 of the card board 1, and a wide sheet 19 (see FIG. 1) is bonded to the top surface 16 of the card board 1. At 19, each of the upper surface openings 13 is closed simultaneously. By mounting the printed circuit board 2 into the card board 1 in this manner, a predetermined number of terminal portions 22 arranged in parallel near one end of the printed circuit board 2 are connected to the card board 1.
It faces each contact space 14 of.

As shown in FIG. 5, the cantilever connector 61 of the connector 6 is obliquely raised from the bottom to the top, and its tip is bent into a substantially S-shape. When the tip of the memory card 10 is inserted into the opening 62 of the connector 6, the tip of the cantilever connector 61 is inserted into the lower beam 1.
It moves relatively along the inclined surface 122 of the printed circuit board 2, climbs over the upper end portion 121, and comes into elastic contact with the terminal portion 22 of the printed circuit board 2.

〔Effect of the invention〕

The present invention has the above-described configuration, and by providing an upper beam portion and a lower beam portion facing each other in the vicinity of the upper surface opening and the insertion opening, the end portion of the card board is mechanically reinforced. Therefore, there is no concern that deformation such as curvature will occur, and peeling of the conductive pattern, poor contact between the conductive pattern and the semiconductor element, and damage to the semiconductor element will not occur.

Furthermore, since the top opening is covered with a sheet, there is no possibility of dust or oil adhering to it, and there is no risk of contact failure. Further, by covering the top opening with a sheet, a member charged with static electricity is prevented from being inserted through the top opening and coming into contact with the conductive pattern on the printed circuit board, which would adversely affect the semiconductor element. Because of this, it is possible to provide a memory card with high operational reliability.

[Brief explanation of drawings]

Figures 1 to 5 are for explaining the present invention in detail. Figure 1 is a plan view of the memory card, Figure 2 is a sectional view of the memory card, and Figure 3 is a perspective view of the main parts of the card board. FIG. 4 is a sectional view of the card board, and FIG. 5 is a sectional view of main parts showing a state in which a memory card is inserted into a connector. FIG. 6 is a perspective view of a main part of a card board in a conventional memory card, and FIG. 7 is a sectional view of a main part showing a state in which the memory card is inserted into a connector. 1...Card board, 2...Printed board, 10...
・Memory card, 11... Upper beam part, 12... Lower beam part, 13... Top surface opening, 14... Contact space, 15... Side end part, 16... Top surface, 19. ... Sheet, 21 ... Insertion opening, 22 ... Terminal part, 23 ...
- Semiconductor element, 24... - recess. ] 2 ] 21 ] 8 ko 9 ] ]○

Claims (1)

[Claims] A printed circuit board on which a semiconductor element is mounted and a predetermined number of terminals arranged in parallel near one end, a wide recess into which the printed circuit board is inserted on the lower surface side, and one of the printed circuit boards has a wide recess into which the printed circuit board is inserted. A card board having a predetermined number of hollow contact spaces arranged in parallel near the end and communicating with the recess,
Inserting the printed circuit board into the recess of the card board,
In a memory card in which the terminal portions of the printed circuit board face the contact spaces of the card board, an upper surface opening that communicates with the contact space is provided on the upper surface of the card board, and an insertion opening that communicates with the contact space is provided on the side end surface of the card board. , respectively, an upper beam portion is provided between the upper surface opening and the insertion opening, a lower beam portion is provided near the insertion opening, and each upper surface opening is covered with a sheet.