JP2553438Y2 - Memory card connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a memory card connector into which a memory card is inserted and which transmits a signal between a circuit built in the memory card and an external circuit. .

(Prior Art) Conventionally, a card with a built-in magnetic stripe has been frequently used as a bank card, various credit cards, and the like.
Since the magnetic stripe has a small storage capacity, a memory card incorporating a semiconductor memory or the like has been used.

FIG. 4 is an exploded perspective view showing an example of the memory card in an exploded manner.

This memory card 10 has a memory IC 1 on a printed circuit board 11.
2, a button cell 13, a built-in connector 14, and other circuit elements and the like are arranged to form a circuit 15, on which a frame 16 is placed to have a uniform thickness, and a metal plate 17 is provided on both sides thereof. Is sandwiched. This metal plate 17 retains the mechanical strength of the memory card 10 and
15 has the role of electrically shielding.

FIG. 5 shows the connection with the built-in connector of the memory card;
FIG. 9 is a perspective view showing an example of a conventional memory card connector.

In the memory card connector 20, both ends of the housing 21 extend, and a guide groove 23 for guiding the insertion of the memory card 10 forward (in the direction of arrow 22) is formed. The memory card connector 20 has a contact 24,
One end of the contact 24 is inserted into a hole (not shown) provided in the printed board 30 and soldered, and is electrically connected to a circuit (external circuit) on the printed board 30.

The memory card 10 is inserted into the memory card connector 20 with the built-in connector 14 facing forward and both side edges guided by the guide grooves 23. By this insertion, both contacts (14a, 24) of the built-in connector 14 and the memory card connector 20 are electrically connected. Thereby, the internal circuit 15 (see FIG. 4) built in the memory card 10 and the external circuit (not shown) on the printed circuit board 30 are electrically connected, and signals are transmitted between the two circuits. It is.

(Problem to be Solved by the Invention) The memory card 10 is handled in substantially the same manner as a conventional bank card or the like provided with a magnetic stripe, and is carried alone. Although most of the surface of the memory card 10 is covered with the metal plate 17, the metal plate 17 is not connected to other circuits when the memory card 10 is stored and carried, and therefore, the memory card 10 10 may generate static electricity. Static electricity memory card 10
5 is inserted into the memory card connector 20 as shown in FIG. 5, static electricity flows at the moment when the two contacts 14a and 24 come into contact, and the internal circuit 15 (see FIG. 4) in the memory card 10 may be destroyed. There is a problem that there is. In addition, in order to preserve the contents stored in the memory card 10 for a long period of time, it is necessary to minimize the consumption of the battery 13 (see FIG. 4) built in the memory card 10, so that the internal circuit 15 It is formed with high impedance, and there is also a problem that when the memory card 10 is inserted into the memory card connector 20 and a signal is transmitted and received, noise is likely to be mixed in the vicinity of the engaging portion between the contacts 14a and 24. More importantly, recent electronic devices using a memory card have been increasingly required to be smaller and denser, and in particular, to have a low profile (low profile), and have to satisfy these requirements.

In view of the above problems, the present invention has a low-profile structure that does not cause the circuit to be destroyed by the static electricity even when the static electricity is generated in the memory card, and that prevents noise from being mixed in signal transmission and reception. It is an object of the present invention to provide a memory card connector having excellent assembling workability.

(Means for Solving the Problems) The present invention provides a memory card connector which has a contact at a front end and connects a memory card having a metal plate on a surface to an external circuit formed on a printed circuit board. A shield cover covering at least an upper surface and a side surface of a housing for holding a mating contact fitted to the contact, forming a recess from the upper surface near both sides of a rear end of the housing and forming a mounting hole; A part near the insertion end of the memory card is cut and raised and bent downward to form a contact piece for making contact with the memory card, and a fixing piece with a mounting hole to be superimposed on an upper surface of the recess of the housing. Formed at the rear end thereof, and a mounting metal such as a screw passing through the mounting hole of the fixing piece and the mounting hole of the housing. In is characterized in carrying out the earth to the fixed and the printed circuit board to the housing of the shield cover.

(Operation) In the memory card connector of the present invention, a recess is formed from the upper surface near both sides of the rear end of the housing, a mounting hole is formed, and a part near the insertion end of the memory card is cut and raised and bent downward. A shield cover having a formed contact piece and a fixing piece with a mounting hole overlapped on the upper surface of the concave portion of the housing. The shield cover is fixed to the housing and the printed circuit board is grounded by using a mounting bracket such as a screw penetrating the mounting hole of the fixing piece and the mounting hole of the housing. When the memory card is inserted along the guide groove of the memory card connector, the metal plate on the surface of the memory card first contacts the contact piece of the shield cover to discharge static electricity, and then interconnect the contacts. The shield cover substantially covers the entire memory card connector to perform shielding, thereby effectively preventing the entry of noise and the like.

(Example) Hereinafter, an example of the present invention will be described.

1A to 1C are a plan view, a left side view, and a front view, respectively, showing an example of a shield cover of the memory card connector of the present invention.

The shield cover 25 has a contact piece 25a substantially at the center of the plan view (FIG. 1A). The contact piece 25a is brought into contact with the metal plate 17 (see FIG. 4) of the memory card 10 (see FIG. 5) inserted from the direction of arrow 22 as shown by the broken line in the front view (FIG. 1C). It is bent inward. Further, a part of the shield cover 25 is bent stepwise to form a fixing piece 25b for fixing the shield cover 25 to the printed circuit board 30 together with the housing of the memory card connector.

FIG. 2 is a perspective view showing an example of the memory card connector of the present invention provided with the shield cover shown in FIGS. 1A to 1C. The same members as those of the conventional memory card connector shown in FIG. 5 are denoted by the same reference numerals as in FIG. 5, and the detailed description is omitted here.

This memory card connector 20 'shield cover 25
Extends substantially the same as the guide grooves 23 at both ends in the insertion direction of the memory card 10 (the direction of the arrow 22), and except for the surface on which the memory card 10 is inserted and the lower surface on which the printed circuit board 30 is disposed. The upper surface along one side of the card 10, the contact 24 is exposed from the housing 21 (see FIG. 5), and the upper right end surface in FIG. .

FIG. 3 is a cross-sectional view showing a state where a memory card is inserted into the memory card connector shown in FIG. 2 along the line XX 'in FIG.

The contacts 24 of the memory card connector 20 'are inserted into holes 30a provided in the printed circuit board 30,
Is soldered on the back side of. Also, the memory card connector 20 ′ is connected to the printed circuit board together with the shield cover 25 by screws 26 and nuts 27 which are mounting brackets communicating with the holes 21 a provided in the housing 21 and the holes 30 b of the printed circuit board 30.
Fixed to 30. The hole 30 on the back of the printed circuit board 30
A grounding conductor (not shown) is arranged around b, so that the shield cover 25 is
Are electrically connected to the ground of the printed circuit board 30.

When the memory card 10 is inserted in the direction of arrow 22 in the figure,
Before the two contacts 14a and 24 are joined at the joining portion 28, the contact piece 25a is attached to the metal plate 17 covering the surface of the memory card 10.
Contact, thereby removing static electricity from the memory card 10 and giving the metal plate 17 an effect as a shield. That is, even if the metal plate 17 and the shield cover 25 are electrically integrated with each other, and the device having the printed circuit board 30 generates noise, the memory card 10 is completely inserted into the memory card connector 20 '. Memory card after 10
In the transmission and reception of signals between a circuit such as a memory IC built in the printer and an external circuit on the printed circuit board 30, mixing of noise is prevented.

In the embodiment shown in FIGS. 1A to 3, the shield cover 25 does not cover the lower surface (the surface on which the printed circuit board 30 is disposed) in FIGS. 2 and 3. Of course, this is good, and in this case, the effect of preventing noise can be further enhanced.

(Effects of the Invention) As can be understood from the above description, the memory card connector of the present invention is formed by integrally stamping and bending a contact piece forward in the memory card insertion direction and a step fixing piece backward in the memory card connector. The upper surface of the housing is covered with the formed shield cover. Therefore, the shield of the memory card connector and the prevention of static electricity of the memory card can be surely performed only by attaching the housing with the shield cover to the printed circuit board with the mounting bracket, and the prevention of noise and the prevention of destruction of the electric circuit element can be reliably performed.

According to the memory card connector of the present invention, a recess is formed in the upper surface on both sides of the rear end of the housing, an attachment hole is formed in the recess, and the step fixing pieces of the shield cover are overlapped and collectively fixed with screws and nuts. Since it is mounted on the printed circuit board, not only can the shield cover and the housing be fixed to each other and to the printed circuit board and ground easily and securely, but the screws and nuts do not protrude from the memory card connector, making it possible to reduce the height. This has a practically remarkable effect of satisfying the demand for miniaturization of electronic equipment using the card.

[Brief description of the drawings]

1A to 1C show an example of a shield cover of the memory card connector of the present invention. FIG. 1 is a plan view, a left side view, and a front view, respectively. FIG. 2 is a shield shown in FIGS. 1A to 1C. FIG. 3 is a perspective view showing an example of the memory card connector of the present invention provided with a cover. FIG. 3 shows a state where a memory card is inserted into the memory card connector shown in FIG. FIG. 4 is an exploded perspective view showing an example of a memory card in an exploded manner. FIG. 5 is a perspective view showing an example of a conventional memory card connector coupled to a built-in connector of the memory card. It is. 10 Memory card, 14a, 24 Contact 17 Metal plate 20, 20 'Memory card connector 21 Housing, 25 Shield cover 25a Contact piece, 25b Fixing piece 26 Screw (Mounting bracket) 27 Nut (Mounting bracket) 30 Printed circuit board

Claims (1)

(57) [Scope of request for utility model registration] 1. A memory card connector for connecting a memory card having a contact at a front end and having a metal plate on a surface to an external circuit formed on a printed circuit board, wherein a mating contact fitted to the contact of the memory card is provided. A shield cover that covers at least an upper surface and side surfaces of the housing to be held, a recess is formed from the upper surface near both sides of a rear end of the housing, and a mounting hole is formed; and the shield cover has a vicinity of an insertion end of the memory card. A part is cut and raised and bent downward to form a contact piece for making contact with the memory card, and a fixing piece with a mounting hole to be superimposed on the upper surface of the recess of the housing is formed at a rear end thereof, The shield cover is attached to the mounting hole of the fixing piece and the mounting hole of the housing with screws such as screws. A memory card connector, which is fixed to a housing and grounded to the printed circuit board.