JP2944970B2 - connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector used for a memory card, a communication card and the like, and more particularly to a structure for preventing static electricity.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is an exploded perspective view of a memory card according to a conventional example described in Japanese Unexamined Patent Application Publication No. 8 or JP-A-4-10295.
This memory card is a two-piece type using a connector, 1 is a printed circuit board, 2 is a printed circuit board 1
An IC chip 3 mounted on the board 3 is a connector having 36 to 80 pins, and is mounted on one end of the printed circuit board 1.

Reference numeral 4 denotes a metal upper name plate whose periphery is framed by a resin frame 5, and reference numeral 6 denotes a lower metal name plate. The printed name board 1 is sandwiched between the upper name plate 4 and the lower name plate 6. A memory card is configured. Note that the frame 5 has a function of supporting the printed board 1 and the connector 3.

In such a memory card, there is a possibility that the IC chip 2 mounted on the printed circuit board may be destroyed by an external static electricity and the memory function may be lost.

Conventionally, as a countermeasure against static electricity, a hole or a concave portion is provided in a ground terminal portion of the printed circuit board 1, and a coil spring 8 is projected from the upper surface and the lower surface of the printed circuit board 1 into the hole or the concave portion. In such a manner, a static electricity relief mechanism is employed in which the upper and lower projecting portions of the coil spring 8 are elastically contacted with the upper name plate 4 and the lower name plate 6.

[0006]

However, in the above-mentioned conventional apparatus, (1) the coil spring must be provided, the number of parts increases, and the assembling work becomes complicated.
(2) The coil springs are entangled during the assembly process, which hinders automatic loading. (3) The coil springs easily come off the printed circuit board (especially in the case of a concave notch).
(4) The coil spring is crushed (deformed), and the contact with the nameplate is likely to be uncertain.

In order to solve such a drawback, an IC card such as that disclosed in Japanese Patent Application Laid-Open No. 5-282507 has been proposed before the present invention. 6 and 7 are diagrams for explaining this IC card.
Is a partially exploded perspective view of the IC card, and FIG. 7 is a sectional view of the IC card.

As shown in FIG. 7, the IC card has a frame 100, a pair of metal nameplates 101 and 102 sandwiching the frame 100, and an IC chip 103 which is disposed between the nameplates 101 and 102 and is spaced apart therefrom. And the like, and a connector 106 provided with a large number of connection terminals 105 disposed on the front side of the printed circuit board 104.

The four connection terminals 105 located on both sides of the large number of connection terminals 105 form an extension 105 a extending in the direction of the printed circuit board 104.
a are curved in the direction facing each other so that the printed circuit board 10
4 ground patterns 10 formed on both upper and lower surfaces
7 (see FIG. 6).
Is electrically connected to

Another connection terminal 108 paired with these four connection terminals 105 includes upper and lower nameplates 101, 1 respectively.
02 has an extended portion 108a which extends in the direction of 02 and is curved upward and downward, respectively.
As shown in (1), they come into contact with the inner surfaces of the nameplates 101 and 102 and are electrically connected to the nameplates 101 and 102.

Therefore, when this IC card is inserted into a card reader / writer, the connector pin on the reader / writer side is raised,
It is inserted between the lower pair of connection terminals 105 and the connection terminals 108 and comes into contact with both. For this reason, the nameplates 101 and 102 are electrically connected to the ground pattern 107 via the connection terminals 108, the connector pins, and the connection terminals 105, so that countermeasures against static electricity are taken.

However, in this IC card, as is apparent from FIG. 6, the extension 108a of the connection terminal 108 is outside the connection terminal 105 and extends from the rear end of the connector 106 in a free and unstable state. Curved downward. Therefore, the extension portion 108a may come into contact with another member during the assembly of the IC card, or the extension portion 10a
8a are entangled and bent excessively inward,
Or it may be bent obliquely in the lateral direction.

If the extension 108a is bent inwardly and incorporated into an IC card, the contact with the nameplates 101 and 102 will not be made, or the contact will be unstable, and the reliability of the countermeasures against static electricity will be reduced. This poor contact
Even if the extension portion 108a is not excessively bent before being assembled, when the extension portion 108a is pressed and deformed by the nameplates 101 and 102, the extension portion 108a is free and the pressing deformation is not restricted by anyone. It may bend, resulting in poor contact.

If the extension 108a is bent obliquely and laterally, it comes into contact with other connection terminals 105, causing various troubles. This contact accident occurs more conspicuously as the number of connection terminals 105 in the connector 106 increases and the pitch between the connection terminals 105 decreases. Further, if the extension 108a is bent in the horizontal direction, the extension 108a
Is pressed and deformed by the nameplates 101 and 102, its tip comes into contact with a conductive pattern or an electronic component on the printed circuit board 104, causing various troubles. This contact accident
In particular, when the thickness of the product (IC card) is reduced and the distance between the printed circuit board 104 and the extension portion 108a is reduced, it is particularly easy to occur. For this reason, it becomes an obstacle to increase the number of pins and reduce the thickness of the connector 106.

Further, an extension 105a of each connection terminal 105
When soldering to the printed circuit board 104, the extension 1
Since the extension portion 108a is located near the portion 05a, the extension portion 108a becomes a hindrance at the time of soldering, thereby lowering work efficiency. If the extension 108a is further extended inside the printed circuit board 104 to solve this, the printed circuit board 104
There is a disadvantage that the mounting area of other electronic components and conductive patterns on the above becomes small, which is not preferable.

Other related applications include, for example, Japanese Patent Application Laid-Open Nos. 4-153096 and 5-221191, and the connectors according to these proposals also have the same disadvantages as described above. .

The present invention solves the above-mentioned drawbacks of the prior art, and provides a connector excellent in operation reliability without the protrusion of the ground pin being excessively deformed or laterally deformed. The purpose is to:

[0018]

SUMMARY OF THE INVENTION To achieve the above object, the present invention is directed to a connector having a connector frame and a predetermined number of connector pins arranged in the connector frame.

A notch, such as a through-hole, which is open at least toward the upper or lower surface, is formed in a portion of the connector frame corresponding to the ground pin of the connector pins, and a part of the ground pin is formed through the notch. The connector frame is projected from at least an upper surface or a lower surface of the connector frame.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the present invention forms a notch in a connector frame, and a part of a ground pin protrudes through the notch. Therefore, when other members come into contact with the projection of the ground pin and the projection is pressed during handling or assembling the product, the other members eventually come into contact with the outer surface of the connector frame, Since the protrusion is regulated so as not to be deformed by pressing,
The projection of the ground pin is not excessively deformed.

As described above, since the projection of the ground pin is prevented from being excessively deformed, various troubles as described above due to the deformation are eliminated, and a connector excellent in operation reliability can be provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a memory card according to an 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 of a card.

In the connector frame 9 of the connector 3,
A through-hole 9a is formed above and below a portion of the connector pin corresponding to the ground pin 10, and a projecting piece 10a formed above and below the ground pin 10 partially protrudes from the through-hole 9a. As shown in FIG. 4, both end portions 10b, 10b of the projecting piece 10a are connected to both side walls 9 of the through hole 9a.
b, 9b. In FIG. 3, reference numeral 10 b denotes a retaining piece for preventing the ground pin 10 from coming off in the connector frame 9.

Accordingly, when the printed board 1 is sandwiched between the upper nameplate 4 and the lower nameplate 6, the projecting pieces 10a
And the lower nameplate 6, the static electricity from the outside flows from the ground pin 10 to the nameplates 4, 6, so that a reliable countermeasure against static electricity is taken.

As shown in FIG. 4, the tip 10c of the projecting piece 10a is designed not to project from the rear end 9c of the connector frame 9 which is joined to the printed circuit board 1.

The same effect can be obtained if only one of the nameplates 4 and 6 is made of metal and the through hole 9a and the protruding piece 10a are formed only on that side. When the connector has a plurality of ground pins, it is not necessary to project upward and downward projecting pieces, and it is also possible to project the projecting piece of one ground pin upward and the other ground pin downward.

[0027]

According to the first aspect of the present invention, as described above,
A notch is formed in the connector frame, and a part of the ground pin projects through the notch. Therefore, when other members come into contact with the protrusions of the ground pin during handling or during assembly of the product and the protrusions are pressed, the other members eventually come into contact with the outer surface of the connector frame, Since the protrusion is regulated so as not to be further deformed by pressing, the protrusion of the ground pin is not excessively deformed.

As described above, since the protrusion of the ground pin is prevented from being excessively deformed or deformed in the lateral direction, various troubles caused by the deformation are eliminated, and a connector having excellent operation reliability can be provided. .

If a part of the ground pin protrudes from the outer surface of the connector frame as shown in FIGS. 1 and 4, the connection by the jumper wire is easy and reliable.

According to the second aspect of the present invention, since the base of the protruding portion is in the notch, and the base end of the protruding portion is close to the side wall of the notch, a lateral external force is applied. Also, the side wall of the cutout immediately functions as a stopper, and the protrusion is reliably prevented from being deformed in the lateral direction.

[0031]

[0032]

[0033]

According to the third aspect of the present invention, the distal end of the projection of the ground pin does not project from the rear end of the connector frame joined to the printed board. With this configuration, even if the protruding portion of the ground pin is pressed and deformed, the contact with the pattern on the printed board or the electronic component can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a memory card according to a first embodiment of the present invention.

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 ground pin used for 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 5 Frame 6 Lower nameplate 9 Connector frame 9a Through hole 9b Side wall of through hole 9c Rear end of connector frame 10 Ground pin 10a Projecting piece 10b Side edge of projecting piece 10c Tip of projecting piece

Claims (3)

(57) [Claims] 1. A connector comprising a connector frame and a predetermined number of connector pins arranged in the connector frame, wherein at least a portion of the connector frame corresponding to a ground pin of the connector pins is directed upward or downward. A connector having an open cutout, wherein a part of a ground pin projects from at least an upper surface or a lower surface of the connector frame through the cutout. 2. The connector according to claim 1, wherein a root end of the protruding portion of the ground pin is close to and opposed to a side wall of the notch. 3. The method according to claim 1, wherein
The tip of the protruding part of the land pin is
A connector which does not protrude from a rear end joined to a printed circuit board .