JP4562310B2 - Detection switch in card socket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a card socket that accepts a card-like medium such as a memory card, IC card, PC card, floppy disk, etc., and whether or not it is permitted to detect the receipt of a card or write data to the card. The present invention relates to a detection switch provided for the purpose of detection.
[0002]
[Prior art]
Conventionally, the detection switch in the card socket is provided at a card receiving portion of a housing constituting the card socket, and is configured by a contact member that is displaced by a card inserted into the card receiving portion.
[0003]
For example, a card socket that accepts an SD card (Square Digital Card) is configured as shown in FIG. In the figure, reference numeral 100 denotes a housing in which a card receiving portion 102 for receiving an SD card 101 is formed. A first contact member 103 and a second contact member 104 are provided on one side of the card receiving portion 102 along the card insertion direction. A third contact member 105 is installed. The first and third contact members 103 and 105 are pushed and displaced at the side edge of the SD card 101, and the second contact member 104 and the third contact member 105 constitute a card detection switch, The contact member 103 and the second contact member 104 constitute a write protect detection switch for designating whether data can be written. A movable piece 106 is provided on the side edge of the SD card 101, and the displacement of the first contact member 103 constituting the write protect detection switch is controlled at the position of the movable piece 106.
[0004]
In addition, there are various types of detection switches provided in the card socket. A contact member that is displaced by insertion of the card is displaced in the thickness direction of the card to engage with the contact member on the other side (Japanese Patent Laid-Open No. 11-97110), or is displaced by insertion of the card. There is a known configuration (Patent No. 2973402) in which the contact member on the other side is also displaced by the contact member so that the contacts of both contact members are wiped.
[0005]
[Problems to be solved by the invention]
In the detection switch in the card socket as described above, if foreign matter adheres to the contact of the contact member or an oxide film is formed, contact failure of the contact is caused and the switch operation becomes unstable. In this respect, since the wiping operation is not formed in the detection switch having the configuration as shown in FIG. 11, there is a problem that the switch operation becomes unstable.
[0006]
Moreover, in the conventional detection switch, since each contact member which comprises a switch was each formed in the different shape, the number of parts increased and became the obstacle which reduced the cost of a card socket. For example, the card socket of FIG. 11 requires three types of contact members. In another example, since the pair of contact members constituting the detection switch are formed in different shapes, two types of contact members are provided when one detection switch is provided, and at least three types are provided when two detection switches are provided. No contact member was required.
[0007]
The present invention has been made in view of such a problem, and a first object thereof is to provide a detection switch in a card socket in which a switch operation is stable. Another object of the present invention is to provide a detection switch in a card socket that can reduce the cost by using a common contact member.
[0008]
[Means for Solving the Problems]
The detection switch in the card socket of the present invention based on the above object is such that one contact member is displaced in the card surface direction by insertion of the card, and the other contact member is moved to the card by the displacement of the one contact member. Displacement is made in the thickness direction.
[0009]
That is, the present invention provides a detection switch in a card socket that is provided in a card receiving portion of a housing that constitutes a card socket and includes a contact member that is displaced by a card inserted into the card receiving portion.
The detection switch is composed of at least two contact members provided along the card insertion direction on one side of the card receiving portion, and the front end of the one contact member in the card insertion direction is the card surface direction. The first contact is formed at the edge by bending or bending, and the rear end portion of the other contact member is bent or curved in the thickness direction of the card and faces the first contact at the edge. A second contact is formed,
By the card receiving tip corner portion of the inserted card abuts against the front end of the one contact member, those in the second contact said first contact is displaced outwardly plane direction of the card The detection switch in the card socket is characterized in that the second contact is displaced in the thickness direction of the card by the displacement of the first contact.
[0010]
In the above configuration, the at least two contact members may be the contact members having the same shape in which the first contact is formed at one end and the second contact is formed at the other end. Two contact members are required to constitute one detection switch. Three contact members are required to form two detection switches. When the contact member having the same shape is used, the portion of the contact that does not face the contact of the other contact member can be cut off.
[0011]
In the preferred embodiment of the present invention described below, such a contact member is formed by punching a thin metal plate, but the cross-section is a circle, an ellipse, or a polygonal metal such as a triangle or a rectangle. It is also possible to form a contact member by forming a rod.
[0012]
[Action]
In the detection switch in the card socket according to the present invention configured as described above, when the card is inserted into the card receiving portion of the card socket, the first contact is first displaced toward the second contact in the surface direction of the card. Engage with contacts. When the card is further inserted, the first contact is further displaced and the second contact is displaced in the thickness direction of the card. In this process, the engaging portion of the first contact and the second contact moves. . Each contact is wiped by the movement of the engaging portion of the first contact and the second contact.
[0013]
Moreover, by using at least two contact members as contact members having the same shape, the contact members constituting the detection switch can be shared.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the present invention is implemented in a card socket for an SD card will be described with reference to the accompanying drawings.
[0015]
FIG. 1 shows one of the detection switches 10 provided along the insertion direction of the SD card 33 on one side of the card receiving portion 32 formed by the housing 31 of the card socket 30 shown in FIG. In the figure, only the SD card 33 and the contact members 11A and 11B constituting the detection switch 10 are shown enlarged.
[0016]
The contact members 11A and 11B are formed by punching a thin metal plate into a shape as shown in the figure. In the insertion direction of the SD card 33 indicated by an arrow 34, the contact member 11A on the near side and the contact on the back side The members 11B are arranged in a line, and are installed in such a relationship that the front end of the contact member 11A and the rear end of the contact member 11B overlap. The front end portion of the contact member 11 </ b> A is bent or curved in an arc shape so as to protrude toward the card side in the surface direction of the SD card 33, so that the inclined surface portion 12 can face the front end corner portion 33 a of the SD card 33. ing. On the other hand, the rear end portion of the contact member 11B is bent or curved toward an obliquely downward direction (in the drawing) in the thickness direction of the SD card 33.
[0017]
The inclined surface portion 13 of the contact member 11B which is bent or curved is positioned substantially at the same position in the insertion direction of the SD card 33 as the inclined surface portion 12 of the contact member 11A. And the side edge 13a of the inclined surface portion 13 are opposed to each other through a gap, the side edge 12a forms a first contact 14 constituting the detection switch 10, and the side edge 13a forms a second contact 15. In addition, the slope part 16 continuing to the slope part 12 of the contact member 11A can enter below (in the drawing) the flat end face part 17 that continues the slope part 13 of the contact member 11B (see FIG. 2). .
[0018]
Next, the operation when the SD card 33 is inserted into the card receiving portion 32 of the housing 31 with respect to the detection switch 10 configured as described above with the contact member 11A and the contact member 11B will be described. When the SD card 33 is inserted in the direction of arrow 34 in FIG. 1, the tip corner portion 33a of the SD card 33 abuts on the inclined surface portion 12 of the contact member 11A, and the front end portion formed in the arc shape of the contact member 11A is indicated by the arrow. The first contact 14 of the contact member 11A is engaged with the second contact 15 of the contact member 11B. Accordingly, the detection switch 10 is turned on, and insertion of the SD card 33 can be detected.
[0019]
Further, when the SD card 33 is continuously inserted, the displacement of the inclined surface portion 12 in the direction of the arrow 35 advances, and the inclined surface portion 13 of the contact member 11B moves in the thickness direction of the SD card 33 as indicated by the arrow 36 in FIG. And the engaging portion of the first contact 14 and the second contact 15 moves toward the flat surface portion 17 of the contact member 11B. In FIG. 2, the slope portion 13 displaced in the thickness direction of the SD card 33 is indicated by a chain line. Since the contacts 14 and 15 are wiped with each other by the transition of the engaging portion of the first contact 14 and the second contact 15, a film such as a foreign substance or oxide on the contact is removed. The operation can be stabilized.
[0020]
Next, the configuration of the card socket 30 shown in FIG. 3 and below in which the detection switch 10 configured as described above is installed will be described. The housing 31 constituting the card socket 30 is formed by molding an insulating plastic and has a substantially U-shaped plane as shown in FIGS. The space between both side pieces 37 of the substantially U-shaped housing 31 is the card receiving portion 32, and the SD card 33 is received. The card receiving portion 32 is covered with a metal shell 38 attached to the outside of the housing 31.
[0021]
An end piece 39 connecting both side pieces 37 of the housing 31 forms an end portion of the card receiving portion 32, and a plurality of terminals 40 are provided through the end piece 39. Each terminal 40 has a contact piece 41 extending to the card receiving portion 32 so that it can be engaged with a contact (not shown) formed on the surface of the SD card 33. Each terminal 40 has a tail piece 42 which is substantially flush with the bottom surface of the housing 31 on the outer side of the end piece 39, and can be soldered to a conductive pad such as a printed circuit board.
[0022]
The detection switch 10 described first is provided on one of the side pieces 37 constituting the housing 31, that is, on the right side piece 37 in FIG. The contact members 11A, 11B, and 11C and three contact members are installed in a row from the entrance side of the card receiving portion 32, and the contact member 11A and the contact member 11B constitute one detection switch 10, and the contact member 11B and the contact member 11C constitutes another detection switch 10. FIG. 10 shows only these three contact members 11A, 11B, and 11C.
[0023]
As shown in FIG. 10, the contact members 11A, B, and C formed by punching a thin metal plate have the same shape. A contact portion 19 that is bent or curved in an arc shape and includes sloped portions 12 and 16 is connected to one end of the mounting piece 18 that extends in a central band shape (front end in the mounting direction of the SD card 33), and the other end (rear side) A contact portion 20 that is bent or curved at an end and provided with a flat end surface portion 17 and a slope portion 13 is provided continuously. 11 C of contact members installed in the back | innermost side of the card | curd receiving part 32 are cut | disconnected by the intermediate part of the mounting piece 18, and the contact part 19 of one end (front end) is cut off. That is, the part which does not oppose the contact of another contact member is removed.
[0024]
These contact members 11A, 11B, and 11C are arranged in a line by inserting and locking the respective mounting pieces 18 in mounting grooves 43 (FIG. 4) formed along the side pieces 37 of the housing 31. . A locking piece 18 a provided on the mounting piece 18 is locked to the housing 31. The contact portion 19 formed at the front end of the contact member 11A and the contact portion 19 formed at the front end of the contact member 11B are respectively protruded to the card receiving portion 32 and can be displaced in the card surface direction. ing. Further, the contact portion 20 formed at the rear ends of the contact members 11B and 11C is made to face the contact portion 19 formed at the front ends of the contact members 11A and 11B, and the thickness direction of the SD card 33 is within the side piece 37. Thus, two detection switches 10 as shown in FIG. 1 are formed.
[0025]
A mounting piece 18 provided in common to each contact member 11A, 11B, 11C is provided with a tail piece 21 extending from the side edge at a substantially right angle. The tail piece 21 is substantially flush with the bottom surface of the housing 31 when the attachment piece 18 is attached to the attachment groove 43. Similar to the tail piece 42 of the terminal 40, the tail piece 21 is soldered to a conductive pad such as a printed circuit board. It can be attached.
[0026]
As described at the beginning, when the SD card 33 is inserted into the card receiving portion 32 of the card socket 30, the contact portion 19 of the contact member 11A is first displaced outwardly in the card surface direction by the SD card 33, and the first thereof. The contact 14 and the second contact 15 of the contact portion 20 of the contact member 11B engage and wipe. When the SD card 33 is further inserted, the contact portion 19 of the contact member 11B is displaced outward in the card surface direction, and the first contact 14 and the second contact 15 of the contact portion 20 of the contact member 11C are engaged and wiped. do.
[0027]
In this way, the two detection switches 10 are controlled to be turned on and off by the SD card 33. The contact member 11B is a common contact member. For example, the contact member 11B and the contact member 11C detect a card insertion, and the contact member 11A and the contact member 11B detect a card write protect state. can do. The arc-shaped contact portion 19 at the front end of the contact member 11A is opposed to the movable piece installation portion normally provided on the SD card 33, as indicated by 106 in FIG.
[0028]
Since the contact members 11A, 11B, and 11C are made common in the same shape, the cost required for the detection switch 10 in the card socket 30 can be reduced. In this embodiment, the two detection switches 10 are provided. However, even when one detection switch is provided or when three or more detection switches 10 are provided, it is possible to enjoy the merit of common use due to the same shape of the contact member. Is no different.
[0029]
Further, by cutting away the contact portion 19 that does not face the contact portion of another contact member, such as the contact member 11C, the card socket 30 can be prevented from becoming unnecessarily long and the card socket 30 can be reduced in size. Can contribute. In the card socket 30 of the embodiment shown in FIG. 3 and subsequent figures, the contact portion 20 of the contact member 11A is left even though it does not face the contact portion of the other contact member. It is also possible to
[0030]
Finally, parts other than the detection switch 10 of the card socket 30 of the embodiment will be described. An eject mechanism for the SD card 33 and a hold mechanism are provided at the other side piece 37 of the housing 31.
[0031]
The eject mechanism includes an eject rod 44 provided to be movable along the side piece 37, and an eject lever 45 (FIG. 8) provided to be rotatable at a corner portion where the side piece 37 and the end piece 39 are continuous. ing. A button 46 is attached to the outer end of the eject rod 44 so that the eject rod 44 can be pushed in as shown by an arrow 47 through the button 46.
[0032]
As shown in FIG. 9, one end of the eject lever 45 is an engagement portion 45 a that faces the engagement portion 44 a formed at the tip of the eject rod 44 with the shaft portion 48 interposed therebetween, and the other end is the housing. The ejecting piece 49 extends along the end piece 39 of 31. When the eject rod 44 is pushed in, the eject lever 45 rotates as indicated by an arrow 50 so that the eject card 49 can eject the SD card 33 inserted in the card receiving portion 32 outward.
[0033]
Further, the hold mechanism includes a spring member 51 formed by punching a thin metal plate as shown in FIG. The spring member 51 includes a strip-shaped mounting piece 52 and an arc-shaped curved portion 53 continuous with one end thereof. The mounting piece 52 is mounted and fixed in a mounting groove 54 formed in the side piece 37 of the housing 31, and the bending portion 53 protrudes to the card receiving portion 32. By providing a notch (not shown) facing the curved portion 53 at the side edge on the SD card 33 side, the SD card 33 completely inserted into the card receiving portion 32 is connected to the curved portion 53 and the notched portion. It is to be able to hold by the combination. Further, when the card is inserted, a click feeling can be obtained by the engagement between the cutout portion and the curved portion 53.
[0034]
As shown in FIG. 4 showing a bottom view of the card socket 30, a metal nail 55 and a positioning boss 56 are provided on the bottom surface. The metal nail 55 is provided at the tip of both side pieces 37 of the housing 31 so as to be substantially flush with the bottom surface of the housing 31 and can be soldered to a solder pad such as a printed circuit board. The positioning boss 56 has a cylindrical shape that is formed integrally with the housing 31. By engaging with a positioning hole formed in a printed circuit board or the like, the installation position of the card socket 30 is determined accurately.
[0035]
【The invention's effect】
As described above, according to the present invention, one contact member is displaced in the card surface direction by insertion of the card, and the other contact member is displaced in the card thickness direction by displacement of the one contact member. In this way, since the engaging portion of the contact of both contact members is moved, the wiping of the contact is performed and the switch operation of the detection switch can be stabilized.
[0036]
According to the invention of claim 2, since the contact member can be made common, the cost of the card socket can be reduced.
[0037]
According to the third aspect of the present invention, unnecessary portions of the contact member are cut off, so that unnecessary lengthening of the card socket can be avoided.
[0038]
According to the invention of claim 4, the switch operation can be stabilized and the cost can be reduced. Further, since two detection switches are provided, a card socket can be configured in which the insertion of the card and the write protection state can be detected by the detection switch having a stable switch operation.
[Brief description of the drawings]
FIG. 1 is an enlarged perspective view showing two contact members constituting a detection switch according to an embodiment of the present invention.
FIG. 2 is an enlarged side view of a contact portion portion of two contact members constituting the detection switch.
FIG. 3 is a plan view of the card socket according to the embodiment of the present invention.
FIG. 4 is a bottom view of the card socket.
FIG. 5 is a left side view of the card socket.
FIG. 6 is a right side view of the card socket.
FIG. 7 is a rear view of the card socket.
FIG. 8 is a front view of the card socket.
FIG. 9 is a plan view of the card socket with the metal shell removed.
FIG. 10 is an enlarged perspective view showing only three contact members constituting two detection switches.
FIG. 11 is a schematic diagram illustrating an example of a detection switch in a conventional card socket.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Detection switch 11A, 11B, 11C Contact member 12 Slope part 12a Side edge 13 Slope part 13a Side edge 14 First contact 15 Second contact 16 Slope part 17 Flat surface part 18 Installation piece 19, 20 Contact part 30 Card socket 31 Housing 32 Card receiving portion 33 SD card 40 Terminal 44 Eject rod 45 Eject lever 51 Spring member

Claims (4)

Card socket constitute a provided card receiving portion of Haujin grayed are, Oite the detection switch in the card socket constituted by the contact member which thus displaced card that is inserted into the card receiving portion,
Said detection switch is composed of at least two contact member provided along the insertion direction of the card on one side of the card receiving portion, of the one contact member, the front end in the insertion direction of the card is bent or curving in the plane direction of the card with the first contact point on the edge is formed by the rear end portion of the other contact member is bent or curving in a thickness direction of the card that the edge, and the second contact point is formed opposite to the first contact point,
By the tip corner portion of the inserted into the card receiving portion card abuts against the front end portion of the one contact member, said first contact point is displaced outwardly plane direction of the card into the second contact contact, second contact, detection switches in the card socket, characterized in that the displacement in the thickness direction of the card by the displacement of the first contact point. At least two contact member includes a first contact point is formed at one end, according to claim 1 in which the second contact point is made contact member or these same shape formed on the other end card Detection switch on the socket. Contacts material, the detection switch in the card socket of claim 2, part of the contact points not facing the contact point of the other contact member is cut. Card socket constitute a provided card receiving portion of Haujin grayed are, Oite the detection switch in the card socket constituted by the contact member which thus displaced card that is inserted into the card receiving portion,
The detection switch is configured with three contact member of the same shape provided along the insertion direction of the card on one side of the card-receiving portion, at least two contact member, in the insertion direction of the card with the front end portion is first contact point is formed on the edges are bent to curving in the plane direction of the card, the rear end portion of the at least two contact member is bent to bend in the thickness direction of the card on the edge is molded, it said and second contact point is formed to face the first contact point, a common contact a central contact member, one of the detection switches in the contact member and the contact member arrangement It is, and another detection switch is formed of a contact member and the contact member,
Further, other contacts not facing portion of the contact of the contact member of the contact member are cut,
By the tip corner portion of the card that the inserted into the card receiving portion abuts the front end portion of the at least two contact members, the first contact point of at least two contact member is displaced outwardly at the surface direction of the card at least contact with the second contact of the two contact member, the second contact, the detection switch in the card socket, characterized in that the displacement in the thickness direction of the card by the displacement of the first contact point Te.

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