JP3640951B2 - Electronic card and connector used for it - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an electronic card such as a memory card, and more particularly to an antistatic structure for an electronic component such as an IC chip mounted on a printed circuit board.
[0002]
[Prior art]
FIG. 5 is an exploded perspective view of a memory card according to a conventional example described in, for example, Patent Document 1 and Patent Document 2 described later. This memory card is a two-piece type using a connector. 1 is a printed circuit board, 2 is an IC chip mounted on the printed circuit board 1, and 3 is a connector having 36 to 80 pins. It is attached to one end.
[0003]
Reference numeral 4 denotes a metal upper name plate bordered by a resin frame 5, and 6 denotes a metal lower name plate. The memory card is inserted between the upper name plate 4 and the lower name plate 6 so that the printed circuit board 1 is sandwiched between them. Composed. The frame 5 has a function of supporting the printed circuit board 1 and the connector 3.
[0004]
By the way, in such a memory card, there is a possibility that the IC chip 2 mounted on the printed circuit board is destroyed due to static electricity from the outside and the memory function is lost, and it is necessary to take measures against static electricity.
[0005]
Conventionally, as a countermeasure against static electricity, a hole or a concave portion is provided in the ground terminal portion of the printed circuit board 1, and a coil spring 8 protrudes from the upper and lower surfaces of the printed circuit board 1 in the hole or the concave portion, respectively. A static electricity release mechanism is employed in which the upper and lower protruding portions of the coil spring 8 are elastically contacted with the upper name plate 4 and the lower name plate 6.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 61-258798 [0007]
[Patent Document 2]
Japanese Patent Laid-Open No. 4-10295
[Patent Document 3]
JP-A-5-282507 [0009]
[Patent Document 4]
Japanese Patent Laid-Open No. 4-153096
[Patent Document 5]
JP-A-5-221191 [0011]
[Problems to be solved by the invention]
However, in the above conventional device,
(1) Coil springs must be provided, the number of parts increases, and assembly work becomes complicated.
(2) The coil springs are entangled during the assembly process, which becomes an obstacle during automatic loading.
(3) The coil spring is easily detached from the printed circuit board (especially in the case of a recessed portion),
(4) The coil spring was crushed (deformed) and contact with the nameplate was likely to be uncertain.
[0012]
In order to eliminate such drawbacks, conventionally, for example, an IC card as described in Patent Document 3 has been proposed prior to the present invention. 6 and 7 are diagrams for explaining the IC card, FIG. 6 is a partially exploded perspective view of the IC card, and FIG. 7 is a sectional view of the IC card.
[0013]
As shown in FIG. 7, this IC card has a frame 100, a pair of metal nameplates 101 and 102 sandwiching the frame 100, and a space between the nameplates 101 and 102 and an IC chip 103 and the like mounted thereon. The printed circuit board 104 and a connector 106 having a large number of connection terminals 105 disposed on the front surface side of the printed circuit board 104 are mainly configured.
[0014]
The four connection terminals 105 located on both sides of the plurality of connection terminals 105 form an extension part 105 a extending in the direction of the printed circuit board 104, and the extension parts 105 a are curved in a direction facing each other to form the extension of the printed circuit board 104. A ground pattern 107 (see FIG. 6) formed on both upper and lower surfaces is sandwiched and electrically connected to the ground pattern 107.
[0015]
The other connection terminals 108 paired with these four connection terminals 105 have extension portions 108a extending in the direction of the upper and lower name plates 101 and 102 and curved in the vertical direction, respectively, and when the IC card is assembled. As shown in FIG. 7, they are in contact with the inner surfaces of the name plates 101 and 102 and are electrically connected to the name plates 101 and 102.
[0016]
Therefore, when this IC card is inserted into the card reader / writer, the connector pin on the reader / writer side is inserted between the pair of upper and lower connection terminals 105 and 108 and contacts both. For this reason, the nameplates 101 and 102 are electrically connected to the ground pattern 107 via the connection terminals 108, connector pins, and connection terminals 105, and countermeasures against static electricity are taken.
[0017]
However, as is apparent from FIG. 6, the extension 108 a of the connection terminal 108 is outside the connection terminal 105 and extends in a free and unstable state from the rear end of the connector 106 and bends in the vertical direction. ing. For this reason, the extension part 108a may come into contact with other members during the assembly of the IC card or the like, or the extension parts 108a may be entangled to bend inwardly or bend in an oblique lateral direction.
[0018]
If the extension portion 108a is incorporated in the IC card while being bent excessively inside, the contact with the nameplates 101 and 102 is not made or the contact becomes unstable, and the reliability of the countermeasure against static electricity is lowered. Even if the extension portion 108a is not bent excessively before installation, the extension portion 108a is free when the extension portion 108a is pressed and deformed by the name plates 101 and 102, and the pressure deformation is not caused by anyone. Since it is not regulated, it may be bent excessively, resulting in poor contact.
[0019]
Further, when the extension portion 108a is bent obliquely in the lateral direction, it comes into contact with other connection terminals 105 and causes various troubles. This contact accident occurs more remarkably when the number of connection terminals 105 in the connector 106 increases and the pitch between the connection terminals 105 becomes narrower.
[0020]
Further, if the extension portion 108a is bent in the lateral direction, when the extension portion 108a is pressed and deformed by the nameplates 101 and 102, the tip of the extension portion 108a comes into contact with the conductive pattern or the electronic component on the printed circuit board 104, thereby causing various troubles. Arise. This contact accident is particularly likely to occur if the IC card is made thinner and the distance between the printed circuit board 104 and the extension 108a is narrowed. For this reason, it is an obstacle to increase the number of pins of the connector 106 and to make the IC card thinner.
[0021]
Further, when the extension portions 105a of the connection terminals 105 are soldered to the printed circuit board 104, the extension portions 108a are present in the vicinity of the extension portions 105a. Bring In order to solve this problem, if the extension portion 108a is further extended to the inside of the printed circuit board 104, the mounting area of other electronic components and conductive patterns on the printed circuit board 104 is reduced, which is not preferable. .
[0022]
Other applications related to this include, for example, Patent Document 4 and Patent Document 5, and the IC cards according to these proposals have the same drawbacks as described above.
[0023]
SUMMARY OF THE INVENTION An object of the present invention is to provide a highly reliable electronic card and a connector used therefor that can solve the drawbacks of the prior art and can take a sure countermeasure against static electricity.
[0024]
[Means for Solving the Problems]
In order to achieve the above object, a first means of the present invention includes, for example, a printed circuit board on which an electronic component including a memory element (IC chip) is mounted,
A connector in which a predetermined number of connector pins are arranged in a connector frame, attached to the printed circuit board, and a ground pin of the connector pins connected to a ground pattern of the printed circuit board;
In an electronic card comprising two conductive plates disposed in contact with the upper and lower surfaces of the connector frame,
A protruding piece protruding upward from the upper surface of the connector frame and a protruding piece protruding downward from the lower surface of the connector frame are formed on the ground pin,
With the two conductive plates in contact with the upper and lower surfaces of the connector frame, the protruding piece protruding upward contacts the upper conductive plate, and the protruding piece protruding downward is the lower conductive piece. It is characterized by being in contact with the plate .
[0025]
A second means of the present invention is a connector comprising a connector frame and a predetermined number of connector pins arranged in the connector frame.
A ground pin of said connector pins, and protruded piece protruding upward from the upper surface of the connector frame, characterized in that the protruding piece that protrudes downward from the lower surface of the connector frame is formed is there.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of a memory card according to the embodiment, FIG. 2 is an enlarged vertical sectional view of a main part of the memory card, FIG. 3 is an enlarged perspective view of a connector pin used in the memory card, and FIG. It is an expansion perspective view of the principal part.
[0027]
The connector frame 9 of the connector 3 is joined to the printed circuit board 1 as shown in FIGS. 1 and 4, but the printed circuit board side end portion 9d of the connector frame 9 and the end portion opposite to the printed circuit board side end portion 9d. Through holes 9a are formed in a region 9f between the connector pins 9e and above and below the portion corresponding to the ground pin 10 of the connector pins. From this through hole 9a, a protruding piece 10a formed on the top and bottom of the ground pin 10 partially protrudes from the outer surface 9c of the connector frame 9, and as shown in FIG. 4, both base side ends 10b, 10b of the protruding piece 10a are The both side walls 9b and 9b of the through hole 9a are in close proximity to each other. In FIG. 3, reference numeral 10 b denotes a locking piece for preventing the ground pin 10 from coming off in the connector frame 9.
[0028]
Therefore, when the connector frame 9 is sandwiched between the upper name plate 4 and the lower name plate 6, the protruding piece 10 a is pressed and deformed inside the through hole 9 a by the upper name plate 4 and the lower name plate 6, and elastically Since it contacts the lower nameplate 6, static electricity from the outside flows from the ground pin 10 to both nameplates 4 and 6, and a certain countermeasure against static electricity is taken.
[0029]
Even if only one of the name plates 4 and 6 is made of metal and the through hole 9a and the protruding piece 10a are formed only on that side, the same effect can be obtained. When there are a plurality of ground pins of the connector, it is not necessary to project the protruding pieces up and down, and the protruding piece of one ground pin can be projected upward and the other ground pin can be projected downward.
[0030]
【The invention's effect】
As described above, according to the present invention, the static electricity from the outside world is directly transferred to the outside through the protruding piece protruding upward and the protruding piece protruding downward from the connector frame provided on the ground pin without the spring. Since it is made to flow on the board, it is possible to take a certain countermeasure against static electricity and improve reliability.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a memory card according to an embodiment of the present invention.
FIG. 2 is an enlarged longitudinal sectional view of a main part of the memory card.
FIG. 3 is an enlarged perspective view of a connector pin used in the memory card.
FIG. 4 is an enlarged perspective view of a main part of the memory card.
FIG. 5 is an exploded perspective view of a memory card according to a conventional example.
FIG. 6 is a partially exploded perspective view of a conventionally proposed IC card.
FIG. 7 is a sectional view of the IC card.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Printed circuit board 2 IC chip 3 Connector 4 Upper nameplate 4a Protruding part 5 Frame 6 Lower nameplate 6a Protruding part 9 Connector frame 9a Through hole 9b Through hole side wall 9c Connector frame outer surface 9d Printed circuit board side edge part 9e Opposite side edge part 10 Ground pin 10a Protruding piece 10b Root end of protruding piece

Claims (3)

A printed circuit board on which electronic components are mounted;
A connector in which a predetermined number of connector pins are arranged in a connector frame, attached to the printed circuit board, and a ground pin of the connector pins connected to a ground pattern of the printed circuit board;
In an electronic card comprising two conductive plates disposed in contact with the upper and lower surfaces of the connector frame,
A protruding piece protruding upward from the upper surface of the connector frame and a protruding piece protruding downward from the lower surface of the connector frame are formed on the ground pin,
With the two conductive plates in contact with the upper and lower surfaces of the connector frame, the protruding piece protruding upward contacts the upper conductive plate, and the protruding piece protruding downward is the lower conductive piece. An electronic card characterized by being in contact with a board . In a connector comprising a connector frame and a predetermined number of connector pins arranged in the connector frame,
The connector is characterized in that a protruding piece protruding upward from the upper surface of the connector frame and a protruding piece protruding downward from the lower surface of the connector frame are formed on the ground pin of the connector pins.   3. The connector according to claim 2, wherein a plurality of the ground pins are provided, the protruding piece of one ground pin protrudes upward, and the protruding piece of the other ground pin protrudes downward. .

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