JPH0744468B2 - Storage element connection structure of radio selective call receiver - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective call receiver, and more particularly to a structure of a connecting portion for writing information to a storage element provided in the receiver.

[Conventional technology]

Generally, a radio selective call receiver (hereinafter, simply referred to as a receiver) has a ROM (read-only memory) as a storage element for storing its own address information.
Recently, rewritable EEPROM (electrically rewritable memory) has been used for this ROM. When rewriting the information stored in the ROM in this type of receiver, a connector connected to the writing device is connected to a connection terminal provided in a part of the receiver.

For example, FIG. 2 is an example thereof, which is shown in Japanese Patent Application No. 62-167756. In this example, the ROM 3 is mounted on the printed circuit board 2 provided in the receiver housing 1.
Is electrically connected to a connection terminal 4 provided at one end of the printed circuit board 2. The connection terminal 4 is connected to the receiver housing 1
It is disposed so as to face the opening 1a provided in the housing 1 and is electrically connected to the connector 5 inserted into the opening 1a from the outside of the casing agent 1. A writing device 7 is connected to the connector 5 via a wiring 6, and the writing device 7 rewrites information in the ROM 3.

3 (a) and 3 (b) are a plan view and a sectional view showing a connection state between the connection terminal 4 and the connector 5 described above. The connection terminal 4 provided on the printed circuit board 2 has a plurality of connection patterns 4a to 4g arranged in parallel corresponding to the plurality of terminals of the ROM 3, and the connector 5 is internally provided in the connector side housings 8a and 8b. A plurality of connecting pieces 10 provided on the connector board 9
(10a ~ 10g) are arranged in parallel. And connector 5
When the plurality of connecting pieces are inserted into the opening of the housing 1.
10a to 10g are the connection patterns 4a to
It is designed to be electrically connected to each 4g.

[Problems to be Solved by the Invention]

In the structure of the conventional connecting portion described above, the wiring 6 connecting the connector 5 and the writing device 7 is charged with an electric charge due to static electricity or the like, and when the electric charge is connected, the connector 5 and the connection terminal 4 are connected. It flows into all the terminals of ROM3 via. However, V _PP terminal of the ROM, RESRT terminals, the PGM terminal weak to static electricity, which may ROM can introduce the charge to destroy. Therefore, the conventional receiver of this type has a problem that the ROM is destroyed by rewriting the information in the ROM 3 and the normal operation of the receiver is easily disturbed.

It is an object of the present invention to provide a storage element connection structure that prevents ROM destruction and improves receiver reliability.

[Means for Solving the Problems]

According to the storage element connection structure of the present invention, of the plurality of ROM connection terminals arranged facing the opening provided in the housing of the receiver, the tip position of the power supply system terminal is located in front of the other signal system terminals. The power supply system terminal can contact the connector before the signal system terminal.

[Action]

With this configuration, when the connector is connected, the power system terminals are connected before the ROM signal system terminals are connected.Therefore, the electrostatic charge charged on the connector side is discharged through the power system terminals. , Prevents damage to the ROM due to electric charge flowing into the ROM signal system terminals.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing an example of a ROM connection structure of a receiver according to the present invention, and is a view corresponding to FIG. 3 (a). In the figure, reference numeral 1 is a casing of a radio selective call receiver. A connection terminal 4 is provided at one end of a printed circuit board 2 which is internally provided in the casing 1 and has a ROM 3 mounted thereon. It is arranged so as to face the opening 1a provided in the first structure. The connection terminal 4 has a plurality of connection patterns 4a to 4g arranged in parallel corresponding to a plurality of terminals of the ROM 3.

Reference numeral 5 denotes a connector connected to the writing device 7 by the wiring 6, and when inserted into the opening 1a of the housing 1, a plurality of connection pieces 10a to 10g supported by the connector housings 8a and 8b. Are respectively brought into contact with the connection patterns 4a to 4g to make electrical connection.

And, here, among the connection patterns 4a to 4g, the connection patterns 4f and 4g of the V _CC terminal and the GND terminal as a power supply system.
Although each tip is formed to reach the edge of the printed circuit board 2, other V _PP terminal, RESET terminal, PGM terminal, CLOLK
Connection pattern 4 corresponding to signal system terminals such as terminals and DATA terminals
The tips a to 4e are formed so that their tips do not reach the edge of the printed circuit board 2. In other words, the selected positions of the power supply system connection patterns 4f and 4g are formed so as to be located in front of the opening 1a with respect to the other signal system connection patterns 4a to 4f.

Therefore, according to this configuration, when the connector 5 is inserted in the direction a shown in the figure to connect the connector 5 to the receiver, the connection pieces 10a to 10g of the connector 5 are
Of 4a to 4g, each connection pattern of V _CC pin and GND pin 4f, 4
The connection is first made to g, and after a slight delay, the remaining connection patterns 4a to 4d are connected. For this reason, the electric charge charged in the wiring 6 is discharged through these connection patterns at the time when the connection patterns 4f and 4b of the V _CC terminal and the GND terminal are first connected. Electric charges do not flow to each terminal of the ROM3 through another connection pattern connected to. As a result, the charge can be prevented from flowing into the V _PP terminal, the RESET terminal, the PGM terminal and the like of the ROM 3, and the ROM 3 can be protected.

〔The invention's effect〕

As described above, according to the present invention, among the plurality of ROM connection terminals, the tip positions of the power supply system terminals are arranged in front of the other signal system terminals. The connection at the power supply system terminal is performed before the connection of, and the electrostatic charge charged on the connector side is discharged through this power supply system terminal, and the charge flows into the signal system terminal of the ROM and the ROM is destroyed. It has the effect of preventing this.

[Brief description of drawings]

FIG. 1 is a plan view of an essential part of an embodiment of the present invention, FIG. 2 is a perspective view showing a connection state with an information writing device of a radio selective calling receiver to which the present invention is applied, and FIG. The conventional structure is shown, the figure (a) is a top view of a connection structure, and the figure (b) is the longitudinal cross-sectional view. 1 ... Receiver housing, 2 ... Printed circuit board, 3 ... RO
M, 4 ... Connection terminal, 4a-4g ... Connection pattern, 5 ...
Connector, 6 ... Wiring, 7 ... Writing device, 8a, 8b ... Connector-side housing, 9 ... Connector board, 10 (10a-10b) ...
... connecting piece.

Claims (1)

[Claims] 1. An opening is provided in a part of the housing of a radio selective call receiver having a built-in storage element, and a plurality of connection terminals connected to the storage element are arranged facing the opening, and
In a storage element connection structure in which a connector to which a writing device that writes information to the storage element is connected is inserted into the opening to connect to the connection terminal, a storage element of the plurality of connection terminals It is characterized in that the tips of the terminals of the power supply system are arranged in front of the other terminals of the signal system so that the terminals of the power supply system can come into contact with the connector before the terminals of the signal system. Storage element connection structure of radio selective call receiver.