JP3782974B2 - Card connector device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a card connector device for mounting a card in which an IC or the like constituting a memory is mounted, and particularly relates to a card connector having a metal opening / closing door at an insertion port for inserting a card.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, some card connector devices into which a small memory card is mounted are provided with a metal opening / closing door 2 at a card insertion slot 1 as shown in FIG. The open / close door 2 has a horizontally long rectangular shape so as to close the card insertion slot 1, and pivot shafts 2 a and 2 a projecting from the left and right edges are supported by the front end portion of the metal cover 3, and the vertical direction (see FIG. 8 in a direction perpendicular to the paper surface). Although not shown, a part of the cover 3 is soldered to the ground pattern of the circuit board, and the open / close door 2 is electrically connected to the ground pattern of the circuit board through the cover 3.
[0003]
[Problems to be solved by the invention]
By the way, if the memory card 4 to be inserted is charged with static electricity or the operator who inserts the memory card 4 is charged with static electricity, when the memory card 4 is inserted, the contact portion 5 of the memory card 4 is charged with static electricity. May occur. However, in the conventional structure, respectively from which the contact portion 5 for the shortest distance is equal to the door 2 not know discharge occurs, the discharge from the contact portion 5 of ground from the contact portions 5 to door 2 However, if a discharge occurs from the signal contact portion 5, a voltage of several thousand to 10,000 volts is applied to the signal line of the circuit in the memory card 4. There is a risk that data generated in the IC or memory in the card may be destroyed.
[0004]
The present invention has been made in view of the above circumstances, and its purpose is to provide a metal opening / closing door in the card insertion slot, and when a statically charged card is inserted, the circuit in the card is destroyed. The present invention provides a card connector device that can prevent the card from being used.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a card connector device according to claim 1 includes a card insertion portion into which a card is inserted, and a plurality of terminals that come into contact with each contact portion of the card inserted into the card insertion portion. In the card connector device, each contact portion has at least a ground contact portion and a signal contact portion, and a metal opening / closing door is provided at the insertion port for inserting the card into the card insertion portion and opens / closes A protrusion is formed on the door, and the shortest distance from the ground contact part to the protrusion of the card in the insertion start state is configured to be shorter than the shortest distance from the signal contact part to the open / close door. Features.
[0006]
The card connector device according to claim 2, wherein the contact portions are arranged in parallel in a direction orthogonal to the card insertion direction, and the contact portions located at both ends of the arranged contact portions are ground contact portions. And the protrusion part is formed in the both ends of the opening-and-closing door corresponding to each contact part for grounds, It is characterized by the above-mentioned.
[0007]
The card connector device according to claim 3 is characterized in that each protrusion is disposed outward from a position facing the ground contact portion of the card in the insertion start state.
[0008]
The card connector device according to claim 4 is provided with a metal cover that covers the card insertion portion, the cover is connected to the ground pattern of the circuit board, and the open / close door is connected to the ground pattern of the circuit board through the cover. It is characterized by that.
[0009]
[Operation and effect of the invention]
According to the first aspect of the present invention, the shortest distance from the contact portion for ground to the protrusion portion of the card that is in the insertion start state by forming the protrusion on the opening / closing door is shorter than the shortest distance from the contact portion for signal to the cover. Therefore, even if the card is charged with static electricity, the static electricity is easily discharged from the ground contact portion to the protruding portion. Therefore, a high voltage is not applied to the signal line of the circuit in the card due to the discharge of static electricity, and the circuit in the card can be prevented from being destroyed.
[0010]
According to the second aspect of the present invention, since the protrusions are formed at both ends of the opening / closing door corresponding to the respective contact portions for the ground located at both ends of the card, the insertion is started even when the card is electrostatically charged. Sometimes, static electricity is easily discharged from the ground contact portion to the protruding portions formed at both ends of the door. Therefore, it is possible to prevent the circuit in the card from being destroyed by electrostatic discharge at the start of insertion.
[0011]
According to invention of Claim 3, since each protrusion part is arrange | positioned outward from the position which opposes the contact part for ground of the card | curd in the insertion start state, it is the shortest from a contact part for ground to a protrusion part reliably. The distance can be made shorter than the shortest distance from the signal contact portion to the protruding portion. Accordingly, static electricity is more likely to be discharged from the ground contact portion to the protruding portion, and the circuit in the card can be prevented from being destroyed.
[0012]
According to the invention of claim 4, since the open / close door is connected to the ground pattern of the circuit board through the cover, the static electricity discharged to the protrusion flows to the ground of the circuit board through the cover, and It is possible to prevent static electricity from flowing through the signal line.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
<First Embodiment>
A first embodiment of the card connector device according to the present invention will be described below with reference to FIGS.
[0014]
First, a card mounted on the card connector device of the first embodiment will be described. As shown in FIG. 6, the card 10 has a rectangular shape, and includes a circuit board (not shown) in which an IC or the like constituting a memory is mounted in a resin case 11. A plurality of contact portions 12 are disposed on the lower surface of the front end portion of the card 10 (the lower surface of the left end portion in FIG. 6), and are located on the left and right ends (upper and lower ends in FIG. 6) of each contact portion 12. The contact portion 12 is a ground contact portion 12a, the contact portion 12 located in the center is a power contact portion 12b, and the other contact portions 12 are signal contact portions 12c.
[0015]
As shown in FIGS. 1 to 5, the card connector device of the first embodiment includes a resin housing 20 and a metal cover 22 that covers the housing 20.
As shown in FIG. 5, the housing 20 is provided with a card insertion portion 21 into which the card 10 is inserted, and terminals 23 that are in contact with the contact portions 12 of the card 10 at the back thereof. The card insertion part 21 is formed with the upper surface recessed in a square shape, and has a card insertion slot 21a at the front edge part (right edge part in FIG. 5). Further, the left and right inner wall surfaces (upper and lower inner wall surfaces in FIG. 5) serve as guide surfaces 21b and 21b for guiding the card 10 to the insertion position.
[0016]
As shown in FIG. 5, each terminal 23 is formed of an elongated elastic piece, and nine terminals 23 are juxtaposed in a direction orthogonal to the card insertion direction with the tip portion protruding into the card insertion portion 21. . A contact point that contacts each contact portion 12 of the card 10 is formed at the front end portion of each terminal 23, and the end opposite to the front end portion is from the rear end portion (left end portion in FIG. 5) of the housing 20. It protrudes rearward and is soldered to the circuit pattern of the circuit board 24. Of each terminal 23, two terminals 23 located on both left and right ends (upper and lower ends in FIG. 5) are ground terminals 23a, a centrally located terminal 23 is a power supply terminal 23b, and other terminals 23 are provided. This is a signal terminal 23c.
[0017]
As shown in FIG. 2, the cover 22 is formed by bending a metal plate into a frontal portal shape, covers the upper surface of the card insertion portion 21, and the left and right side plates are arranged along the left and right outer sides of the housing 20. . As shown in FIG. 1, among the lower edge portions of the left and right side plates, a total of four locations, both front and rear end portions (left and right end portions in FIG. 1), protrude at right angles along the mounting surface of the circuit board 24. The overhang portion 22a is soldered to the ground pattern 24a of the circuit board 24.
[0018]
The front edge of the cover 22 is formed such that both left and right edges extend forward and the upper edge extends obliquely upward, as shown in FIG. A metal door 25 is rotatably supported. The opening / closing door 25 is formed in a horizontally long rectangular shape that closes the card insertion slot 21 a, and rotating shafts 25 a, 25 a are formed to protrude from both left and right edges. It fits into a support hole formed in the plate. In FIG. 2, a torsion coil spring 26 is attached to the rotation shaft 25a on the left side when viewed from the front, so that the opening / closing door 25 is always urged to a position where the card insertion slot 21a is closed.
[0019]
Furthermore, as shown in FIG. 6, the opening / closing door 25 is formed with protruding portions 27, 27 facing left and right ends (upper and lower ends in FIG. 6). Each projecting portion 27 is formed so as to project from the inside to the outside of the open / close door 25 and extend in the vertical direction. The inner edges of each protrusion 27 (in FIG. 6, the upper edge at the lower protrusion 27 and the lower edge at the upper protrusion 27) are the left and right ends of the card 10 in the insertion start state. The outer edge portion of the ground contact portion 12a located at the bottom (in FIG. 6, the lower edge portion in the lower ground contact portion 12a and the upper edge portion in the upper ground contact portion 12a) is the card insertion slot. It is formed at substantially the same position as the line extending to the side of 21a or slightly outside it. That is, the shortest distance A1 from the ground contact portion 12a to the protruding portion 27 of the card 10 in the insertion start state is shorter than the shortest distance A2 from the signal contact portion 12c to the open / close door 25.
[0020]
Further, as shown in FIG. 2, the opening / closing door 25 has a contact portion 28 protruding from the right edge portion, and the front edge portion of the side plate of the cover 22 is bent inward on the front surface of the contact portion 25b. The bent portion 22b to be brought into contact comes into contact therewith. Thereby, the opening / closing of the opening / closing door 25 is restricted, and the opening / closing door 25 and the cover 22 are in electrical contact, and the opening / closing door 25 is connected to the circuit board 24 from the projecting portion 22a via the cover 22. Conducted to ground.
[0021]
Note that the housing into which the card connector device of the present embodiment is incorporated is provided with an insertion port 28, and the card 10 in the insertion start state where the insertion of the card 10 is started is the opening edge of the insertion port 28. Thus, the relationship between the shortest distance A1 from the ground contact portion 12a to the projecting portion 27 and the shortest distance A2 from the signal contact portion 12c to the open / close door 25 is maintained.
[0022]
Next, the operation of this embodiment will be described. When the card 10 charged with static electricity or an operator charged with static electricity inserts the card 10, when the card 10 is brought close to the card insertion slot 21 a, the shortest distance from each ground contact portion 12 a to the protruding portion 27 of the card 10. Since the distance A1 is shorter than the shortest distance A2 from the signal contact portion 12c to the open / close door 25, static electricity is not easily discharged from the signal contact portion 12c to the open / close door 25, and is discharged from the ground contact portion 12a to the protruding portion 27. (See FIG. 6).
The static electricity discharged to the open / close door 25 flows to the cover 22 through the contact portion 25b, and further flows from the protruding portion 22a to the ground of the circuit board 24.
[0023]
Subsequently, the card 10 is inserted into the card insertion slot 21a by rotating the door 25 inward while pushing the door 25 at the front end. And it guides to the insertion position of the card insertion part 21, and each contact part 12 and each terminal 23 of the card | curd 10 contact each.
[0024]
Thus, in the said embodiment, the protrusion part 27 is formed in the opening-and-closing door 25, and the shortest distance A1 from the contact part 12a for grounds of the card | curd 10 in the insertion start state to the protrusion part 27 is the opening-and-closing door from the signal contact part 12c. Therefore, the static electricity charged on the card 10 at the start of the card insertion is easily discharged from the ground contact portion 12a to the projecting portion 27. It can be prevented that a high voltage is generated in the signal line and the IC or stored data in the card 10 is destroyed.
[0025]
Further, each protrusion 27 is positioned substantially at the same position as or on the outer side of the line extending the outer edge of the ground contact portion 12a of the card 10 in the insertion start state toward the card insertion slot 21a. Since it is formed, the shortest distance A1 from the ground contact portion 12a to the protruding portion 27 of the card 10 in the insertion start state can be surely shorter than the shortest distance A2 from the signal contact portion 12c to the open / close door 25. .
[0026]
Furthermore, since the open / close door 25 is electrically connected to the ground of the circuit board 24 through the cover 22, static electricity discharged to the open / close door 25 flows to the ground of the circuit board 24 and static electricity is applied to the signal line of the circuit board 24. The flow can be avoided.
[0027]
Second Embodiment
Hereinafter, a second embodiment of the card connector device of the present invention will be described with reference to FIG. In addition, about the same structure as 1st Embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
[0028]
In the second embodiment, like the first embodiment, the open / close door 30 is formed in a horizontally long rectangular shape and is rotatably supported, but its central region bulges inwardly. The left and right ends, which are portions other than the bulged area, correspond to the protrusions 31 and 31 of the present invention, and the inner edge of each protrusion 31 (the upper edge in the lower protrusion 31 in FIG. 7). The lower edge in the upper protrusion 31 is the outer edge of the ground contact portion 12a of the card 10 in the insertion start state (in FIG. 7, the lower edge in the ground contact portion 12a on the lower end side). And the upper edge side of the ground contact portion 12a on the upper end side are formed at substantially the same position as or on the outer side of the line extending toward the card insertion slot 21a. That is, as in the first embodiment, the shortest distance B1 from the ground contact portion 12a to the protruding portion 31 of the card 10 in the insertion start state is shorter than the shortest distance B2 from the signal contact portion 12c to the open / close door 30. ing.
[0029]
Thereby, even if the card 10 to be inserted is charged with static electricity, the static electricity is hardly discharged from the signal contact portion 12c to the opening / closing door 30, and the IC in the card 10 is destroyed by the discharge of static electricity as in the first embodiment. There is an effect that can be prevented.
[0030]
In addition, this invention is not limited to the said embodiment, For example, it can change and implement as follows, These embodiments also belong to the technical scope of this invention.
(1) In the first embodiment, each projecting portion 27 is formed by punching the inside of the open / close door 25 outward. However, the projecting portion 27 may be formed by bending, cutting and raising.
[0031]
(2) In the first embodiment, the open / close door 25 is electrically connected to the ground of the circuit board 24 via the cover 22, but may be configured to be directly connected to the ground of the circuit board.
[0032]
(3) In the first embodiment, the card 10 having the ground contact portion 12a positioned on both ends is mounted. However, the card having the ground contact portion positioned on the one end side, or other position is used. A card on which a contact portion for ground is arranged may be mounted.
In addition, the present invention can be implemented with various modifications without departing from the scope of the invention.
[Brief description of the drawings]
FIG. 1 is a top view showing an entire card connector device of a first embodiment.
FIG. 2 is a front view showing the entire card connector device according to the embodiment;
FIG. 3 is a side view showing the entire card connector device according to the embodiment;
FIG. 4 is an external perspective view showing the entire card connector device of the embodiment.
FIG. 5 is a top view showing a state where the cover of the embodiment is removed;
FIG. 6 is a cross-sectional plan view of the card insertion start state of the same embodiment.
FIG. 7 is a plan sectional view showing a card insertion start state of the second embodiment.
FIG. 8 is a plan sectional view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Card 12 Contact part 12a Ground contact part 12c Signal contact part 21 Card insertion part 21a Card insertion slot 22 Cover 23 Terminal 23a Ground terminal 23c Signal terminal 25 Opening and closing door 27 Protrusion part 30 Opening and closing door 31 Protrusion part

Claims (4)

In a card connector device comprising a card insertion portion into which a card is inserted, and a plurality of terminals that come into contact with each contact portion of the card inserted into the card insertion portion,
Each contact portion has at least a ground contact portion and a signal contact portion, and a metal opening / closing door is provided at an insertion port for inserting a card into the card insertion portion, and the opening / closing door includes A protrusion is formed, and the shortest distance from the ground contact portion to the protrusion of the card in the insertion start state is configured to be shorter than the shortest distance from the signal contact portion to the open / close door. A card connector device. The contact portions are juxtaposed in a direction perpendicular to the insertion direction of the card, and contact portions located on both ends of the contact portions arranged in parallel are contact portions for ground, The card connector device according to claim 1, wherein the protrusions are formed at both end portions of the opening / closing door corresponding to the contact portion. 3. The card connector device according to claim 1, wherein each of the protrusions is arranged outward from a position facing the ground contact portion of the card in the insertion start state. 4. A metal cover that covers the card insertion portion is provided, the cover is connected to a ground pattern of the circuit board, and the open / close door is connected to the ground pattern of the circuit board through the cover. The card connector device according to claim 1.

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