JPH01263092A - Data card - Google Patents

Abstract

PURPOSE:To prevent frictional noise from being generated at the time of opening or closing a metallic shutter and facilitate setting of an opening or closing force for the shutter, by a construction wherein a spring for automatically closing the metallic shutter is a tension-type spring. CONSTITUTION:A base 1, a circuit board 2 on which a semiconductor chip having a plurality of connector terminals 3 is mounted, a metallic shutter 4 covering the region of the terminals 3 and capable of being opened and closed by moving along an upper surface of the board 2, a spring 6 for automatically closing the shutter 4 by a returning tensile force at the time of closing the shutter 4, and a guide rail 5 for guiding the movement of the shutter 4 are provided. The shutter 4, U-shaped in surface form, has a hook 8 for fixing one end of the spring to the tip of the shutter 4 in the direction for opening the shutter 4. The spring 8 is provided on the lower side of the plane of the shutter 4, whereby a degree of freedom is provided in setting the length of the spring 4 which determines the opening or closing force.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information card, and more particularly to an information card having an openable/closable metal shutter at a connector terminal portion for external connection.

[Conventional technology]

Conventionally, this type of information card has used a compression type spring that is compressed when a metal shutter covering a connector terminal portion for external connection is opened, and automatically closes the metal shutter by a return expansion force when closed.

[Problem to be solved by the invention]

The conventional information card described above uses a compression spring to automatically close the metal shutter, so when the metal shutter is opened, the spring does not compress straight and the side of the spring scrapes the wall of the spring housing. As a result, there are disadvantages in that the metal shirt shirt generates frictional noise when opening and closing, increases external force when opening, and lacks smoothness when closing.

[Means to solve the problem]

The information card of the present invention includes a base, a circuit board fixed to the base and having a plurality of connector terminals for external connection on the top surface, and a circuit board that covers the top of the connector terminals and moves along the circuit board to open and close. a metal shutter, one end of which is fixed to the base and the other end of which is fixed to the tip of the metal shutter in the opening direction, and which is stretched when the metal shutter is opened and returned when the metal shutter is closed; and a closing spring.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIGS. 1(a) and 1(b) are a plan view and a sectional view taken along the line AA' of the first embodiment of the present invention.

As shown in FIGS. 1(a) and 1(b), it has a base 1 and a plurality of connector terminals 3 for connection with external devices on the upper surface that is fixed on the base 1 and faces the open part of the cover. A circuit board 2 mounted with a semiconductor chip (not shown), a metal shutter 4 that covers the area of the connector terminal 3 and can be opened and closed by moving along the top surface of the circuit board 2, and a stop pin 7 provided at one end of the base 1 at one end. The metal shutter 4 is fixed and the other end is fixed to the hook 8 at the tip of the metal shutter 4 in the opening direction of the metal shutter 4, and when the metal shutter 4 is opened, it is enlarged and when the metal shutter 4 is closed, the metal shutter 4 is automatically closed by the returning tensile force. It includes a spring 6 and a guide rail 5 that guides the movement of the metal shutter 4. Although not shown, a pair of opening/closing mechanisms for the springs 6 are provided on the left and right sides with the circuit board 2 in between.

That is, the surface of the metal shutter 4 has an inverted U-shape, and a hook 8 for fixing one end of a spring is provided at the tip of the metal shutter 4 in the direction in which the metal shutter 4 is opened. By locating the hook 8 below the surface of the metal shutter 4, it is possible to have flexibility in setting the length of the spring 6 that determines the opening/closing force.

FIG. 2 is a characteristic diagram showing the correlation between the load and the stroke of the spring used in the first embodiment shown in FIG.

The spring is made of piano wire with a wire diameter of 0.12 mm and an outer diameter of 1.5 mm.
The opening force of the metal shutter is 36 g at the beginning of opening and 110 g when fully opened with a stroke of 7.2 mm, as shown in FIG.

Generally, the force at the beginning of opening is set to 30 g or more to prevent the metal shutter from opening due to vibration or falling, and the force at full opening is set to 200 g or less.

FIGS. 3(a) and 3(b) are a plan view and a sectional view, respectively, of a second embodiment of the present invention.

As shown in FIGS. 3(a) and 3(b), in the second embodiment, a spring 6 is used as an opening/closing mechanism for the metal shutter 4°.
A is provided at one location in the center.

As a result, the opening/closing mechanism occupies less space in the entire information card than the first embodiment shown in FIG. 1 described above. Therefore, the metal shutter 4. The notch of the circuit board 2a for opening and closing can be reduced to 1/2 of that of the first embodiment, and there is an advantage that the mounting area of the circuit board 2a can be increased.

〔Effect of the invention〕

As explained above, in the present invention, by making the spring that automatically closes the metal shutter into a tension type, there is no friction between the side surface of the spring and the surrounding area when the metal shutter is opened and closed, so that friction noise is generated when the metal shutter is opened and closed. This has the effect of preventing this and allowing smooth opening and closing. or,
Since the degree of freedom in setting the strength of the spring can be increased, the opening/closing force of the metal shirt shirt can be easily set, so that the opening/closing operation becomes reliable and the reliability of the product can be improved.

[Brief explanation of the drawing]

FIGS. 1(a) and (b) are a plan view and a sectional view taken along the line A-A' of the first embodiment of the present invention, respectively, and FIG. 2 is the load of the spring used in the first embodiment of FIG. FIGS. 3(a) and 3(b), which are characteristic diagrams showing the correlation between strokes, are a plan view and a sectional view of a second embodiment of the present invention, respectively. DESCRIPTION OF SYMBOLS 1... Base, 2, 2a... Circuit board, 3... Connector terminal, 4, 4. ...Metal shutter, 5... Guide rail, 6,6. ... Spring, 7... Stopping pin, 8.8a... Hook.

Claims (1)

[Claims] a base; a circuit board fixed to the base and having a plurality of connector terminals for external connection on the top surface; a metal shutter that covers the top of the connector terminals and can be opened and closed by moving along the circuit board; a spring fixed to the base, the other end of which is fixed to the tip of the metal shutter in the opening direction, and a spring that is stretched when the metal shutter is opened and returns to close the metal shutter with a tensile force when the metal shutter is closed; Featured information card.