JPH09305733A - Ic card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an IC card, in which the number of parts is decreased, the cost is reduced and the assembly work is facilitated, concerning the IC card freely attachably and detachably set to information equipment such as a personal computer. SOLUTION: Concerning an IC card for shielding a circuit board housed in a frame with a pair of panels for respectively covering both the upper and lower faces of the frame, this IC card is provided with a frame 20 composed of an insulator having a panel sitting face 21 for placing the peripheral part of an upper face panel 30 on the side of upper face, board sitting face 23 for placing the peripheral part of the circuit board 10 inside the panel sitting face 21 and panel sitting face 22 for placing the peripheral part of a lower face panel 40 on the side of lower face, hole 25 piercing through the board sitting face 22, spring 28 to be inserted into the hole 25, ground connection plate 32 curved along the side edge of the upper face panel 30 so as to be in press- contact with the side face of the frame 20, and ground connection plate 42 curved along the side edge of the lower face panel 40 so as to be in press- contact with the side face of the frame 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC card which is removably set in an information device such as a personal computer.

Such an IC card is designed to prevent damage to electronic circuit parts mounted on the IC card due to electrostatic discharge.
Before the IC card is inserted into the information device and the contact of the IC card is connected to the contact of the information device, it is necessary to eliminate the electrostatic charge charged in the IC card.

[0003]

2. Description of the Related Art A conventional IC with reference to FIGS.
The structure of the card will be described. FIG. 5 is a view of a conventional IC card, (A) is a sectional view, (B) is a plan view, FIG. 6 is a plan view with a front cover removed, and (A) and (B) of FIG. It is a figure which shows the important point of.

In the figure, 10 is a circuit board and 20 is a circuit board.
A molded frame carrying 10 is a top panel made of a metal plate that shields the back surface side of the circuit board 10, and a bottom panel is a metal plate that shields the mounting surface side of the circuit board 10.

The frame 20 is U-shaped in a plan view and is composed of a pair of legs and a connecting portion bridging the rear ends of the legs.
A panel seating surface 21 on which the peripheral parts of the three sides of the top panel 30 are placed is provided on one surface (the upper surface in the figure) of the frame 20, and the peripheral parts of the three sides of the circuit board 10 are provided inside the panel seating surface 21. A substrate seating surface 23 for mounting is provided.

On the other surface (lower surface in the figure) of the frame 20, there is provided a panel seating surface 22 on which the peripheral portions of the three sides of the lower surface panel 40 are placed. Furthermore, the frame 20 has a reinforcing member 29 that connects the vicinity of the tips of the pair of legs.

An edge 24 slightly protruding upward is provided at a side edge in the longitudinal direction of the panel seating surface 21 of the frame 20, and an upper panel 30 is provided.
Does not shift to the left and right. Further, an edge 24 slightly projecting downward is provided at a side edge of the panel seating surface 22 in the longitudinal direction so that the lower panel 40 does not shift in the left-right direction.

The circuit board 10 is provided with a connector portion 11 at its tip. By plugging this connector section 11 into the terminal of the information device, the IC card is set in the information device so that it can be inserted into and removed from the information device.

A protruding portion made of an insulating material is provided on the mounting surface of the circuit board 10 behind the connector portion 11 at an interval equal to the width of the reinforcing member 29 of the frame 20. Connector part
11 is engaged with the opening side of the frame 20, the reinforcing member 29 is sandwiched between the connector portion 11 and the projecting portion, and the peripheral portion on the mounting surface side is placed on the board seating surface 23 of the frame 20 to form the circuit board 10. The frame
It houses 20.

The peripheral portion of the upper panel 30 is placed on the panel seating surface 21 and adhered so that the rear surface of the tip portion is in close contact with the upper surface of the connector portion 11 and the main face plate covers the rear surface of the circuit board 10. The upper panel 30 is attached to the frame 20.

Also, the peripheral portion of the lower surface panel 40 is placed on the panel seating surface 22 so that the back surface of the tip portion is in close contact with the lower surface of the connector portion 11 and the main surface plate covers the mounting surface of the circuit board 10. ,
The lower panel 40 is attached to the frame 20 by adhesion.

The conventional electrostatic discharge preventing means will be described below. As shown in FIG. 7 (A), the conventional electrostatic discharge preventing means includes means for insert-molding the ground connection metal fitting 50 on the side surface of the leg portion of the frame 20, and as shown in FIG. 7 (B). There is a means for fitting the ground connection fitting 55 to the side surface of the leg portion of the frame 20.

The earth connecting fitting 50 insert-molded into the frame 20 shown in FIG. 7A is a fitting main body 51 having a pair of upper and lower leg plates having elasticity and a side plate connecting the bases of the leg plates with a U-shaped cross section. A part of one leg plate is composed of a projecting piece 52 extending in the direction of the circuit board 10.

The grounding metal fitting 50 is so constructed that the outer surface of the side plate of the metal fitting body 51 is barely exposed on the side surface of the leg portion of the frame 20.
The frame 20 is insert-molded. The protrusion 52 of the ground connection fitting 50 is the ground pad 12 formed on the circuit board 10.
The upper leg plate of the metal fitting body 51 has its tip end elastically contacting the inner surface of the peripheral portion of the upper panel 30, and the lower leg plate of the metal fitting body 51 has its tip end surrounding the lower surface panel 40. It makes elastic contact with the inner surface of the part.

The ground connection fitting 55 fitted to the leg portion of the frame 20 shown in FIG. 7B is a fitting main body having a U-shaped cross section, which is composed of a pair of elastic upper and lower leg plates and a side plate connecting the roots of the leg plates. 56, and a part of one of the leg plates is formed with a protruding piece 57 extending in the direction of the circuit board 10.

The ground connection fitting 55 is so constructed that the outer surface of the side plate of the fitting main body 56 is barely exposed on the side surface of the leg portion of the frame 20.
It is fitted on the frame 20. Ground connection bracket 55
The projecting piece 57 is to be soldered to the earth pad 12 formed on the circuit board 10, and the upper leg plate of the metal fitting body 56 is such that the tip end thereof makes elastic contact with the inner surface of the peripheral portion of the upper panel 30,
The tip of the lower leg plate of the metal fitting body 56 is in elastic contact with the inner surface of the peripheral portion of the lower panel 40.

Each of the ground connection fittings is electrically connected to the ground pad of the circuit board and the top panel 30 and the bottom panel 40, and the outer surface of the side plate of the fitting body is the frame 20.
The outside of the legs is bare.

Therefore, when the IC card is inserted into the card insertion port of the information device, the metal fitting body of the grounding metal fitting, before the contact of the IC card is connected to the contact of the information device,
That is, the side plate of the metal fitting body comes into contact with the spring member provided in the guide groove of the card insertion slot, and the electrostatic charge charged on the upper and lower panels of the IC card passes through the ground connection metal fitting and the spring member of the information device to the housing. Disappears.

Further, the frame ground of the circuit board is grounded to the housing.

[0020]

The above-mentioned conventional I
The C card has a problem in that durability and assembling workability are poor because the grounding metal fitting and the circuit board are soldered and the upper and lower panels are bonded to the frame with an adhesive. It was

Further, since the grounding metal fitting is required, the number of parts may increase and the cost may increase.
Furthermore, since the upper and lower panels are bonded, the adhesive deteriorates due to high temperature exposure or deformation due to temperature cycling, the panel shifts from the frame, the edges of the panel are caught by fingers, etc. There was a problem that it could not be inserted.

The present invention was created in view of the above points, and an object thereof is to provide an IC card which is easy to assemble, has a small number of parts, and is low in cost.

[0023]

In order to achieve the above object, the present invention provides a circuit housed in a frame 20 with a pair of upper and lower panels 30 and 40 covering the upper and lower surfaces of the frame 20, respectively. In an IC card that shields the board 10, a panel seating surface 21 on which the peripheral portion of the upper surface panel 30 is mounted, and a board seating surface 23 on which the peripheral portion of the circuit board 10 is mounted inside the panel seating surface 21. Has a bottom panel on the bottom side
A frame (20) made of an insulator having a panel seating surface (22) on which a peripheral portion (40) is placed is provided.

Further, a hole 25 penetrating the substrate seating surface 23 and a hole
And a spring 28 to be inserted into 25. Further, a ground connection plate 32 is bent on the side edge of the upper panel 30 so as to be pressed against the side surface of the frame 20 to be clamped, and a ground connection plate 32 is bent on the side edge of the lower panel 40 to be pressed against the side surface of the frame 20 to be clamped. Ground connection plate 42.

The spring 28 includes a circuit board 10 and a lower panel 40.
Is interposed between the ground pad 12 formed on the surface of the circuit board 10 and the lower surface panel 40, and the outer surface of each ground connection plate 32, 42 serves as a card insertion port of the information device. It shall come into contact with the grounding spring member provided.

According to the present invention, since the ground connection plates are provided on each of the upper panel and the lower panel, the number of parts is smaller than that of the conventional IC card provided with the ground connection fittings separately from the panels. And low cost.

When the upper panel and the lower panel are pressed to the frame side, the ground connection plate sandwiches the side surface of the frame and fixes them to the frame. Therefore, the assembling work is simple.

According to the second aspect of the present invention, as illustrated in FIG. 3, the ground connection plates 32 and 42 of the upper panel 30 and the lower panel 40 are U-shaped in side view, and the side portions of the frame 20 are gripped. It is configured to have.

According to the second aspect of the invention, since the ground connection plate holds the side surface portion of the frame, the reliability of fixing to the frame of the upper panel and the lower panel is higher. The invention of claim 3 is, as illustrated in FIG. 4, a slit penetrating a pair of panel seating surfaces 21, 22 facing the back of the frame 20.
Equipped with 27. Further, a tongue piece 33 bent to the side edge of the upper surface panel 30 so as to be fitted into the slit 27, and a tongue piece 43 bent to the side edge of the lower surface panel 40 so as to be fitted to the slit 27 are provided.

The pair of tongue pieces 33 and 43 arranged to face each other are
The slit 27 is configured to be superposed and elastically contacted. According to the present invention, the upper panel 30 and the lower panel 40 are electrically connected and mechanically connected and fixed.

Therefore, in addition to the above-mentioned ground connection plate, the reliability of fixing the upper panel and the lower panel to the frame is further improved. According to the invention of claim 4, the upper surface panel is provided at least at four corners of the panel seating surface 21 on the upper surface side of the frame 20.
An edge 24-1 for positioning 30 is provided, and an edge 24-2 for positioning the lower surface panel 40 is provided at least at four corners of the panel seating surface 22 on the lower surface side.

As described above, by providing the edges 24-1 and 24-2 at the four corners of the upper and lower surfaces of the frame 20, it becomes easier to assemble the upper panel and the lower panel. Further, since the edges of the upper and lower surface panels do not project to the outside of the frame 20, fingers and the like are not caught.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. The same reference numerals indicate the same objects throughout the drawings.

FIG. 1 is a perspective view showing the present invention in a separated form,
FIG. 2 is a sectional view of an embodiment of the present invention. 3 is a diagram showing a ground connection plate of the present invention, (A) is a perspective view, (B) is a sectional view, FIG. 4 is a diagram showing the essential points of the present invention, (A) is a perspective view, B) is a sectional view.

As shown in the figure, the circuit board 10 is provided with a connector portion 11 at its tip, and when the IC card is inserted into the card insertion slot of the information device, the connector portion 11 plugs into the terminal of the information device. Has become.

A U-shaped ground pattern is provided in the peripheral portion on the back surface side of the circuit board 10, and a ground pad 12 is provided in the vicinity of the rear portion of the mounting surface of the circuit board 10 (which is opposite to the connector portion 11). ing.

Further, the frame 20 is mounted on the mounting surface of the circuit board 10.
With a spacing equal to the width of the reinforcing member 29 described later, a protruding portion made of an insulator is provided behind the connector portion 11, and the reinforcing member 29 is sandwiched between the front surface of this protruding portion and the rear surface of the connector portion 11. There is.

The molded frame 20 has a U-shape in plan view, which comprises a pair of legs and a connecting portion bridging the rear ends of the legs. Further, a reinforcing member 29 having a substantially rectangular cross section is provided to connect the vicinity of the tips of the pair of legs.

On the upper surface side of the frame 20, the upper panel 30
A panel seating surface 21 for mounting the peripheral portions of the sides is provided, and a board seating surface 23 for mounting the peripheral portions of the three sides of the mounting surface of the circuit board 10 is provided inside the panel seating surface 21.

Since the board seating surface 23 is provided at a lower position than the panel seating surface 21 with a step equal to the plate thickness of the circuit board 10, the peripheral portion of the mounting surface of the circuit board 10 is located on the board seating surface 23. When mounted on 23, the circuit board 10 is positioned and the back surface of the circuit board 10 is flush with the panel seating surface 21.

On the lower surface side of the frame 20, a lower surface panel
A panel seating surface 22 on which the peripheral portions of the three sides of 40 are placed is provided. Frame corresponding to the ground pad 12 of the circuit board 10.
A hole 25 penetrating the substrate seating surface 23 of 20 is provided.

4 of the panel seating surface 21 on the upper surface side of the frame 20
On the outer periphery of the corner, an edge 24-1 having a height equal to the thickness of the top panel 30
In addition, the edges 24-2 having a height equal to the plate thickness of the lower panel 40 are provided on the outer periphery of the four corners of the panel seating surface 22 on the lower surface side.

As shown in detail in FIG. 3, the frame 20
In the vicinity of the rear portions of the side surfaces of the left and right legs of each of the notches, facing notches having depths substantially equal to the plate thickness of the upper panel 30 (the plate thickness of the lower panel 40) are provided, and at the center of each notch. Grooves 26 are provided parallel to the legs.

Further, as shown in detail in FIG. 4, slits 27 are formed in the vicinity of the front portions of the left and right legs of the frame 20 so as to penetrate the panel seating surfaces 21, 22 facing back. Reference numeral 28 is a compression coil spring which is inserted into the hole 25 from the lower side of the frame 20 and whose upper end is seated on the ground pad 12 of the circuit board 10 and which is made of, for example, phosphor bronze wire.

The upper panel 30 made of a thin metal plate (for example, stainless steel plate) has a shallow dish shape with a convex upper surface.
The panel seating surface of the frame 20 is surrounded by four rounds of the rectangular main face plate 31.
21, peripheral part of the circuit board 10 and the connector part 11 of the circuit board 10
Has a seating portion that closely contacts the upper surface of the.

As shown in detail in FIG. 3, the frame 20
Corresponding to the groove (26), a ground connection plate (32) having a U-shaped side view is provided so as to face the left and right side edges of the upper panel (30). This ground connection plate 32 connects the top panel 30 to the frame 20.
When seated on the panel seating surface 21 of, and pressing the upper portion of the ground connection plate 32, the tip end hits the cutout portion of the frame 20, and when the flexed tip end portion elastically deformed outward reaches the position of the groove 26,
After returning, the tip end fits into the groove 26, and the ground connection plate 32 grips a part of the leg portion of the frame 20.

The lower panel 40 made of a thin metal plate (for example, a stainless steel plate) is manufactured in contrast to the upper panel 30. That is, the lower surface panel 40 has a shallow rectangular dish shape that is convex downward, and is in close contact with the panel seating surface 22 of the frame 20 and the lower surface of the connector portion 11 of the circuit board 10 on the four circumferences of the rectangular main surface plate 41. It has a seat.

Bottom panel corresponding to the groove 26 of the frame 20
A ground connection plate 42 having a U-shaped side view is provided so as to face the left and right side edges of 40. With this ground connection plate 42, when the lower surface panel 40 is seated on the panel seating surface 22 of the frame 20 and the upper portion of the ground connection plate 42 is pressed, the tip portion of the ground connection plate 42 is
The notched part of the
When it reaches the position of 26, it returns and the tip part fits in the groove 26,
The ground connection plate 42 holds a part of the leg portion of the frame 20.

The ground connection plate 32 and the ground connection plate 42
May be formed by bending it into an L-shape instead of the U-shape in cross section so as to sandwich a part of the leg portion of the frame 20.

As shown in detail in FIG. 4, elastic tongue pieces 33 are fitted in slits 27 formed in the panel seating surface 21 of the frame 20 near the front portions of the left and right side edges of the top panel 30. Is installed.

Further, elastic tongue pieces 43 which are fitted into the slits 27 provided in the panel seating surface 22 of the frame 20 are bent near the front portions of the left and right side edges of the lower panel 40. Therefore, the upper panel 30 is seated on the panel seating surface 21 on the upper surface of the frame 20, the tongue piece 33 is fitted into the slit 27, and the lower panel 40 is mounted on the panel seating surface on the lower surface of the frame 20.
When the tongue piece 43 is seated on the seat 22, and the tongue piece 43 is fitted into the slit 27, the pair of tongue pieces 33 and 43 facing each other are superposed and elastically contacted in the slit 27.

In order to assemble an IC card with the above-described components, the peripheral portion of the mounting surface of the circuit board 10 is set to the frame 20.
The circuit board 10 is accommodated in the frame 20 by being seated on the board seating surface 23, and by sandwiching the reinforcing member 29 of the frame 20 between the protrusion provided on the circuit board 10 and the rear surface of the connector part 11.

Then, the lower surface panel 40 is attached to the lower surface of the frame 20 so that the front end portion is in close contact with the lower side surface of the connector portion 11 and the peripheral portion is in close contact with the panel seating surface 22 of the frame 20. To the side of the leg of the frame 20 and
Insert 43 into slit 27.

Next, the top panel 30 is arranged so that the tip portion comes into close contact with the upper side surface of the connector portion 11 and the peripheral portion comes into close contact with the panel seating surface 21 of the frame 20 and presses the periphery of the circuit board 10.
Is attached to the upper surface of the frame 20, the tongue piece 33 is fitted to the side surface of the leg portion of the frame 20, the tongue piece 33 is fitted into the slit 27, and the tongue piece 43 of the lower panel 40 is superposed and elastically contacted. Then, the circuit board 10, the frame 20, the upper panel 30, and the lower panel 40 are integrally fixed.

In the IC card as described above, the circuit board 10 is shielded by the upper panel 30 and the lower panel 40.
The ground pattern on the back side of the circuit board 10 is the top panel.
The ground pad 12 electrically connected to the mounting board 30 of the circuit board 10 is electrically connected to the lower panel 40 via the spring 28.

The upper panel 30 and the lower panel 40 are electrically connected via the tongues 33 and 44. Therefore, when the IC card is inserted into the card insertion port of the information device, the ground connection plates 32, 42 of the IC card connector portion 11 are connected to the contacts of the information device before the contacts are connected.
However, it contacts the spring member provided in the guide groove of the card insertion slot, and the electrostatic charges charged on the upper and lower panels 30 and 40 of the IC card flow into the housing through the spring member of the information equipment and disappear.

On the other hand, the frame ground of the circuit board 10 is grounded to the case.

[0058]

Since the present invention is configured as described above, it has the following effects.

Since the ground connection plate is provided on each of the upper panel and the lower panel, there is no need to provide a ground connection fitting separately from the panel, and the number of parts is small and the cost is low.

When the upper panel and the lower panel are pressed to the frame side, the ground connection plate holds the side surface of the frame and is fixed to the frame. Therefore, the assembling work is simple and the adhesive is used. Not so durable.

Further, the U-shaped ground connecting plate has a high reliability of fixing the upper panel and the lower panel to the frame. By using the tongues of the upper and lower panels in the slits of the frame together with the ground connection plate, the reliability of fixing the upper and lower panels to the frame is further improved.

By providing the edges for positioning the panels at the four corners of the frame, the upper and lower panels can be more easily assembled. Moreover, since the edges of the upper and lower panels do not project to the outside of the frame, fingers are not caught and the handling of the IC card is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing the present invention in a separated form.

FIG. 2 is a cross-sectional view of an embodiment of the present invention.

FIG. 3 is a view showing a ground connection plate of the present invention, (A) is a perspective view, and (B) is a sectional view.

FIG. 4 is a view showing a main part of the present invention, (A) is a perspective view,
(B) is a sectional view.

FIG. 5 is a diagram of a conventional example, (A) is a cross-sectional view, and (B) is a plan view.

FIG. 6 is a plan view with a surface cover of a conventional example removed.

7 (A) and 7 (B) are diagrams showing conventional essential points.

[Explanation of symbols]

 10 Circuit board 11 Connector part 12 Ground pad 20 Frame 21,22 Panel seating surface 23 Board seating surface 24,24-1,24-2 Edge 25 hole 26 Groove 27 Slit 28 Spring 30 Top panel 32,42 Ground connection plate 33, 43 Tongue piece 40 Bottom panel 50,55 Grounding fitting

Claims (4)

[Claims] 1. An IC card that shields a circuit board housed in a frame by a pair of panels that cover the upper and lower surfaces of the frame, and a panel seat for mounting the peripheral portion of the upper panel on the upper surface side. And a panel seating surface for mounting the peripheral part of the circuit board inside the panel seating surface, and a panel seating surface for mounting the peripheral part of the lower panel on the lower surface side, which is made of an insulator. A frame, a hole penetrating the substrate seating surface, a spring inserted into the hole, a ground connection plate bent on a side edge of the top panel so as to press-contact with a side surface of the frame, and a side surface of the frame A ground connection plate bent on the side edge of the lower surface panel so as to be pressed into contact with the lower surface panel, and the spring is formed on the surface of the circuit board with the spring interposed between the circuit board and the lower surface panel. Conducts electrical connection between the ground pad and the bottom panel The IC card is characterized in that each of the ground connection plates has an outer surface in contact with a grounding spring member provided in a card insertion port of the information device. 2. The ground connection plate of the top panel is U-shaped in side view and grips a side part of the frame, and the ground connection plate of the bottom panel is U-shaped in side view. The IC card according to claim 1, wherein the IC card holds a side surface of the IC card. 3. A slit penetrating a pair of panel seating surfaces facing the back of the frame, a tongue bent on a side edge of the upper panel so as to be fitted into the slit, and a slit to be fitted into the slit. An IC card, comprising: a tongue piece bent on a side edge of the lower panel, wherein the pair of tongue pieces arranged opposite to each other overlaps and elastically contacts in the slit. 4. A panel seat on the lower surface side of the frame for positioning the lower surface panel and edges provided at at least four corners of the panel seating surface on the upper surface side of the frame for positioning the upper surface panel. The edges provided in at least the four corners of the surface,
An IC card characterized by having it.