JPH09218926A - Card connector - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] Without increasing the size of the housing (10).
Provided is a card connector that does not come into contact with the printed wiring board (130) even if the contact (30) is inadvertently pressed down. An insulating thin plate (15) integrated with a housing (10) is arranged between a printed wiring board (130) and a movable contact portion (31) of a contact. Insulation thin plate (15)
Is the lowest point of the contact (30) and the printed wiring board (130) when it is pushed down by the card (110).
Since the insulating thin plate (15) does not increase the size of the housing (10), the housing (10) does not become large. Even if the contact (30) is inadvertently pressed down, the insulating thin plate (1
5) but not the printed wiring board (130). Therefore, the pattern on the printed wiring board (130) is not damaged by the contact (30).

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a chip card,
The present invention relates to a structure of a card connector that accommodates a card such as an IC card and electrically connects a fixed electrode of the card to a corresponding pattern on a printed wiring board.

[0002]

2. Description of the Related Art A card connector is attached to an electronic device such as a mobile phone, and the card and the electronic device are electrically connected to each other, so that the electronic device is connected only to a card in which a specific ID is stored. To operate
This is to activate additional functions.

A conventional card connector 100 is shown in FIG.
As shown in FIG. 3, a housing 101 made of synthetic resin formed in a rectangular frame shape and an insulating cover 102 rotatably supported on one side of the housing 101 are provided. Housing 1
At the center of 01, a card accommodation hole 103 that opens upward is provided so as to accommodate the card 110 shown in FIG. 11 horizontally from above. The insulating cover 102 covers the card housing hole 103 after housing the card 110. When the insulating cover 102 is closed as shown in FIG. 13, the pressing portion 102a of the insulating cover 102 causes the card 11 to move.
The upper surface of 0 is pressed.

A plurality of contact accommodating holes 104 are formed so as to communicate with the card accommodating hole 103 from the side surface on the front surface (left side in the drawing) and rear surface (right side in the drawing) of the housing 101. In the hole 104, the contact 12
0 is attached so that the movable contact portion 121 at its free end faces the contact receiving hole 103.

The contact 120 is formed by punching and bending a conductive metal plate into an elongated strip shape. The contact 120 is bent slightly upward in the contact receiving hole 103, and then the tip is bent downward to be movable. The contact part 121,
It is composed of a fixed portion 122 press-fitted into the mounting groove 105 in the contact receiving hole 104 and a contact leg portion 123 protruding from the contact receiving hole 104 to the outside of the housing. The tip of the movable contact portion 121 is curved so that the edge of the card 110 does not catch the tip of the contact 120 when the card 110 is attached or detached, and the contact 120 is not bent upward. A locking projection (not shown) is provided on the fixing portion 122 so as to project. The locking projection is locked to the inner wall surface of the mounting groove 105 to fix the contact 120 to the housing 101.

The card connector 100 is surface-mounted on the printed wiring board 130. That is, the positioning protrusion 106 hung from the bottom surface of the housing 101 is fitted into the through hole 131 of the printed wiring board 130, the card connector 100 is placed at a predetermined position, and each contact leg portion 123 is attached to the printed wiring board 130. It is arranged on a land pattern (not shown) and is soldered to this land pattern.

On the bottom surface of the card 110, the contacts 12
The fixed electrode 111 corresponding to the pitch of 0 is exposed in a flat plate shape, and the card 110 is inserted into the card receiving hole 1 as shown in FIG.
When the insulating cover 102 is closed after it is housed in 03, the fixed electrode 111 makes elastic contact with the movable contact portion 121 of the contact and is electrically connected to the land pattern of the corresponding printed wiring board 130 via the contact 120.

[0008]

In such a card connector 100, it is possible to predict the maximum deflection of the contact 120 when the card 110 is accommodated. Therefore, the tip of the movable contact portion 121 and the printed wiring in the state shown in FIG. Board 13
The bottom surface of the housing 101 is opened so that a slight gap is left between the card connector 100 and 0, and the height of the card connector 100 is made low (low profile).

However, as shown in FIG. 12, when the card 110 is not housed, the movable contact portion 121 of the contact 120 is exposed on the upper surface side, so that the movable contact portion 121 may be inadvertently pushed down by foreign matter. there were. For this reason, the contact 120 is pressed onto the printed wiring board 130, which causes a problem that the pattern on the printed wiring board 130 is damaged or the pattern connected to the contact 120 and another pattern are short-circuited.

Further, the contact 120 may be pushed down by a finger accidentally charged with static electricity.
There is a problem in that the circuit element of the electronic device is electrostatically destroyed by contacting the pattern on the printed wiring board 130 without interposing the protection circuit.

If the tip is curved downward, it is necessary to increase the height of the housing 101 in order to secure a gap between the tip and the printed wiring board 130. There is a problem that the pattern is easily contacted and the pattern is easily damaged.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to reduce the size of the housing and to provide a card connector which does not come into contact with the printed wiring board even when the contact is inadvertently pushed down. The purpose is to provide.

[0013]

To achieve the above object, a card connector according to a first aspect of the present invention is provided with a card accommodating recess having an upper opening and a plurality of contact accommodating holes communicating from the side surface to the card accommodating recess. An insulative housing that is formed and placed on the printed wiring board, a fixed part that locks to the housing in each contact receiving hole, and a movable part that is cantilevered by the fixed part so that it can move in the card receiving recess. A contact portion and a plurality of contacts each of which protrudes outside the housing and includes a contact leg portion that is solder-connected to the pattern of the printed wiring board, elastically contacts the movable contact portion with the fixed electrode of the card housed in the card housing recess, In the card connector that electrically connects the fixed electrode of the card and the corresponding pattern on the printed wiring board, the printed wiring board can be contacted. Between the contact portion, characterized in that disposed an insulating thin plate integral with the housing.

Even if the movable contact portion of the contact is inadvertently pushed down, it contacts the insulating thin plate between the printed wiring board and the contact, so that the contact comes into contact with the pattern on the printed wiring board and the pattern is damaged by the contact. In addition, a contact between the patterns on the printed wiring board does not cause a short circuit.

Since the insulating thin plate can be arranged in the gap between the lowest point of the contact when pushed down by the card and the printed wiring board, by disposing the insulating thin plate, the total height of the housing is increased. It won't be expensive.

The card connector according to a second aspect of the present invention is characterized in that the tip of the movable contact portion is brought into contact with the lower surface of the flange portion of the housing while the card is not accommodated.

Since the initial pressure is applied to the movable contact portion of the contact in advance, a predetermined contact pressure can be obtained by a slight bending after the contact with the card, and the contact with the printed wiring board can be achieved without contacting the printed wiring board. Can be closer together.

Further, since the tip of the movable contact portion is covered with the flange portion, the card does not catch on the tip of the contact and the contact is not bent upward. Therefore,
It is not necessary to bend the tip downward, and the gap between the tip and the printed wiring board can be made closer to reduce the height of the housing.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS.

1 to 3 show a card connector 1 according to the present embodiment. In these figures, 10 is a housing, 20 is a cover, and 30 is a contact.

The housing 10 is formed of an insulating synthetic resin into a thin plate shape, and as shown in FIG. 4, a pair of positioning frames 11 and 12 are arranged so as to face each other in the front-rear direction (left-right direction in the drawing). The card accommodation recess 2 is formed on the plane. One end of the inner side surface of the rear positioning frame 12 becomes the inclined surface 12a, and the card 110 is accommodated only when it matches the asymmetrical contour of the card 110 shown in FIG. Is being prevented.

As shown in FIG. 5, a pair of positioning frames 1
Contact housing holes 13 that communicate with the card housing concave portion 2 are formed in the housings 1 and 12 from four positions on the front surface and the back surface of the housing 10, respectively. These contact receiving holes 13 are continuous from the inside of the positioning frames 11 and 12 to the lower part of the card receiving concave portion 2. Inside the positioning frames 11 and 12, mounting grooves 13a are provided on both inner side surfaces to form an inverted T-shaped cross section. (See FIG. 2), there is a square groove 13b below the card accommodating recess 2.

The upper surface of the inner end of the square groove 13b is covered with a flange portion 14 which constitutes a part of the bottom surface of the card accommodating recess 2. Further, a part of the bottom surface of the square groove 13b from the inner end is covered with the insulating thin plate 15. The insulating thin plate 15 is shown in FIG.
As shown in FIG. 0, when the contact 30 is bent by the card 110, the contact 30 is arranged in the gap between the lowest point and the printed wiring board 130, and has a thickness smaller than this gap. Therefore, the height of the housing 10 is not increased by disposing the insulating thin plate 15. Further, the insulating thin plate 15 is arranged at a position where it comes into contact with the contact 30 when the contact 30 is further forcedly pushed down from the position shown in FIG. There is no contact with the wiring board 130.

These flange portion 14 and insulating thin plate 15
Can be integrally formed with the housing 10 by a pair of molds that are located at positions where they do not overlap each other on the vertical line and that vertically move relative to each other.

Two insulating thin plates 1 on the bottom of the housing 10
5 is a through hole 131 of the printed wiring board 130.
A positioning protrusion 17 that fits into the card is vertically provided to position the card connector 1 at a predetermined position on the printed wiring board 130.

The cover 20 is made of synthetic resin and has a thick pressing portion 20a for pressing the card 110 on the bottom surface and a pair of rotating arm portions 20 for holding the side surface of the housing 10 at the rear side.
b is formed. As shown in FIG. 1, the cover 20 is rotatably supported around the rear of the housing 10 by the pivot pin 3 inserted between the rotating arm portion 20 b and the housing 10, and the cover 20 is closed. In the state of 10, the pressing portion 20a is adapted to enter the card accommodating concave portion 2.

The cover 20 is provided with a metal lock plate 21 that slides back and forth while gripping both sides of the cover 20. When the lock plate 21 is moved forward in the state shown in FIG. 10 with the cover 20 closed, the periphery of the lock frame portion 16 of the housing 10 shown in FIG.
Is restricted.

As shown in FIGS. 7 and 8, the contact 30 is formed by punching out a conductive thin metal plate into a slender plate shape and then bending it. A semicircular bent portion 31 near the tip.
It is composed of a movable contact portion 31 in which a is formed, a wide fixed portion 32 connected at the base end of the movable contact portion 31, and a contact leg portion 33 bent in a crank shape. Locking protrusions 32 a that lock with the inner wall surface of the mounting groove 13 a of the housing 10 are provided on both side surfaces of the fixing portion 32.
The contact 30 is fixed in the contact accommodating hole 13 by press-fitting it into the mounting groove 13a and engaging it with the inner wall surface thereof.

With the contact 30 attached,
As shown in FIG. 9, the movable contact portion 31 is housed in the square groove 13b, the eaves portion 31a projects into the card housing recess 2, and the tip end thereof contacts the lower surface of the flange portion 14. Since the lower surface of the flange portion 14 is located below the mounting groove 13a, an initial pressure is applied to the contact 30 before the contact with the card 110, and a contact pressure with the card 110 can be obtained with a slight bending. . Further, since the tip end is covered with the flange portion 14, even if the card 110 is not housed, the contact 30 does not turn up due to foreign matter, and the plastic deformation of the contact 30 can be prevented.

A contact 30 is provided in each contact receiving hole 13.
The card connector 1 accommodating the card is positioned on the printed wiring board 130 by inserting the positioning protrusions 17 into the through holes 131 of the printed wiring board 130. At this time, the eight contact leg portions 33 projecting from the front and rear of the housing 10 are respectively positioned on the corresponding land patterns (not shown) of the printed wiring board 130 and solder-connected.

In the card connector 1 surface-mounted on the printed wiring board 130 as described above, the contact 30 is exposed on the bottom surface of the card accommodating recess 2 in the state shown in FIG. 9 in which the card 110 is not accommodated. It may be forcibly pushed down by a finger, the edge of the card 110, or the like by mistake, but since the insulating thin plate 15 is arranged below the movable contact portion 31, the printed circuit board may be damaged by a contact or the printed circuit board may be damaged. Pattern is contact 3
No short circuit through 0.

When the card 110 is set in the card accommodating recess 2 of the card connector 1, the fixed electrode 111 exposed on the bottom surface of the card 110 comes into contact with the curved portion 31a of each contact 30. Subsequently, as shown in FIG. 10, when the cover 20 is closed and the lock plate 21 is slid forward, both sides of the lock plate 21 are engaged so as to hold the lock frame portion 16, and the rotation of the cover 20 is restricted. To be done. Card 110
The contact 3 is pressed by the pressing portion 20a of the cover.
Since it makes elastic contact with the movable contact portion 31 of 0, the card 110
The fixed electrode is electrically connected to the corresponding land pattern of the printed wiring board 130 via the contact 20.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the above-described embodiment, the cover 20 is used to prevent the card 110 from coming out of the card housing recess 2. However, instead of the cover 20, the card 110 is pressed by the housing of the electronic device, or the card 1
An engaging portion that engages with the inner surface of the card accommodating recess 2 may be provided in 10 to hold the card accommodating recess 2 inside.

[0034]

As described above, according to the present invention, since the insulating thin plate is disposed between the printed wiring board and the movable contact portion of the contact, even if the contact is unintentionally pushed down, the movable contact is moved. The portion abuts the insulating thin plate. Therefore, the contact does not come into contact with the pattern on the printed wiring board, the pattern is not damaged by the contact, and the patterns on the printed wiring board are not short-circuited by the contact.

According to the second aspect of the present invention, since the initial pressure is applied to the movable contact portion of the contact in advance, a predetermined contact pressure can be obtained with a slight bending after the contact with the card, and the insulating thin plate or the print can be obtained. It is possible to reduce the height of the housing by reducing the distance from the wiring board. In particular, since it is not necessary to bend the tip of the contact downward, it is possible to further reduce the height of the housing without contacting the insulating thin plate.

Further, since the tip of the movable contact portion is covered with the flange portion, the card does not hang on the tip of the contact and the contact is not bent upward.

[0037]

[Brief description of drawings]

FIG. 1 is a plan view of a card connector 1 according to an embodiment of the present invention.

FIG. 2 is a left side view of the card connector 1 of FIG.

3 is a front view of the card connector 1 of FIG. 1. FIG.

FIG. 4 is a plan view of the housing 10.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a sectional view taken along line BB of FIG. 4;

7 is a plan view of the contact 30. FIG.

FIG. 8 is a side view of the contact 30.

FIG. 9 is a vertical cross-sectional view of the card connector 1 with a cover 20 opened.

FIG. 10 is a vertical cross-sectional view of the card connector 1 in which the card 110 is accommodated and the cover 20 is closed.

11 is a perspective view of a card 110. FIG.

FIG. 12 is a cover 10 of a conventional card connector 100.
It is a longitudinal cross-sectional view showing a state in which 2 is opened.

FIG. 13 is a cover 10 of a conventional card connector 100.
It is a longitudinal cross-sectional view showing a state in which 2 is closed.

[Explanation of symbols]

 1 Card Connector 2 Card Recessed Recess 10 Housing 13 Contact Receiving Hole 14 Flange 15 Insulating Thin Plate 30 Contact 31 Movable Contact 32 Fixed Part 33 Contact Leg 111 Card Fixed Electrode 130 Printed Wiring Board

Claims (2)

[Claims] 1. A card accommodating recess (2) having an upper opening.
And a plurality of contact receiving holes (13) communicating from the side surface to the card receiving recess (2) are formed, and the insulating housing (10) is mounted on the printed wiring board (130).
A fixed part (32) that locks with the housing (10) in each contact receiving hole (13), and a movable contact that is cantilevered by the fixed part (32) so as to be movable in the card receiving recess (2). The part (31) and the outside of the housing (10),
A plurality of contacts (30) including a contact leg (33) for solder connection with a pattern of the printed wiring board (130) are provided, and movable contact is made with the fixed electrode (111) of the card housed in the card housing recess (2). In a card connector for elastically contacting a part (31) and electrically connecting a fixed electrode (111) of a card with a corresponding pattern of a printed wiring board (130), a movable contact between the printed wiring board (130) and a contact (30). A connector for a card, characterized in that an insulating thin plate (15) integrated with the housing (10) is arranged between the part (31) and the part (31). 2. The front end of the movable contact portion (31) is brought into contact with the lower surface of the flange portion (14) of the housing (10) while the card (110) is not accommodated therein. The card connector described.