JPS61101145A - Connector for portable terminal device - Google Patents

Abstract

PURPOSE:To improve the reliability by using an AND between an RS signal and a DS processing so as to control a light emitting diode, using the lighting of the emitting diode as a mark signal, using an integration of the received light by a photodetector as a CD signal and using a signal amplified by the photodetector as an RD signal so as to reduce wear of connected parts. CONSTITUTION:An ER signal provides a delay time for a time until a switch circuit 5 is activated and a 5V power supply is supplied stably to all circuits. Then when the ER signal is set, optical connectors 2a, 3a are operated. In modes other than the signal mode, the ER signal is reset to attain low power consumption. A terminal device 1 transmits an SD signal only after a CS signal is set. The SD signal applies ON-OFF control to a transistor TR1 via a NOT circuit 8 and an AND circuit 7 through a limit resistor R. In receiving a data, the power is applied to a light emitting diode 13 through a limit resistor R2. The photodetection diode 13 is activated by receiving a light and this signal is amplified by an operational amplifier AMP11 and becomes the RD signal.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a connection device for a mobile terminal device used for data entry and the like.

', - Prior Art A portable terminal device using a conventional data entry system stores collected data in a memory and transmits the data to a host muff via a modem. or
Data was sent directly to the host machine. Figure 3 shows
This is an example of an RS-2320 signal commonly used in data communications, and a time chart thereof is shown in FIG.

In Figures y and y, when the ER signal turns ON (1+ timing), the DR signal returns from modem 2 (
t2). Terminal 1 sends an RS signal O when transmitting data.
At N, confirm that the CS signal is ON at the terminal Ct3. t+>S, data is transmitted by the SD double signal (t,). After the transmission is completed, the R and S signals 0FFL and the CS signal become Off'F (t6+t7). Modem 2 transmits data from the SND signal. Next, when receiving data, terminal 1 checks whether the CD signal is ON (t3) and receives R and D data. The data received from the host is R.
The signal is supplied to the modem 2 as an EC signal.

FIG. 5 is a perspective view of the conventional portable terminal device.

In FIG. 5, the portable terminal device 1 is connected to the 7 shown in FIG.
A total of nine signal lines (E to CD) and two power lines are required as the connection part 1a, and this connection part 1a is connected to the modem 2.
I was using it by attaching and detaching it.

Problems to be Solved by the Invention However, in the conventional portable terminal device 1 described above, when the portable terminal device 1 is attached to or detached from the modem 2, many terminals of the connecting portion 1a are brought into contact with the modem 2. Because there are
A problem arises in that reliability deteriorates due to wear of the connecting portion 1a.

The present invention solves the above-mentioned problems and provides a highly reliable portable terminal device with less wear on the connecting portion.

Means for Solving the Problems In order to solve the above problems, the connection device for a mobile terminal device of the present invention has an RS-232C interface and an ER
, the delayed signal of the signal is made into a DR multiplied signal, all the power supply circuits are turned on and off by the ER multiplied signal, the delayed signal of the S signal is made into a CS signal, and the light emitting diode is controlled by the AND of the RS signal and the SD multiplied signal. When the light emitting diode emits light, it is used as a mark signal, when the light receiving section receives the light, its integral value is used as a CD signal, and the amplified signals of the light receiving section are used as R and D signals.

Effect The present invention has the above-mentioned configuration, and the connecting portion of the mobile terminal device;
The connecting portion of the modem connected thereto can be an optical coil lid, and a highly reliable portable terminal device with less wear on the connecting portion can be obtained.

Embodiment A connection device for a mobile terminal device according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an electrical system diagram of a connection device for a mobile terminal device according to an embodiment of the present invention, and FIG. 2 is a perspective view of the same embodiment.

In FIGS. 1 and 2, 3 is a terminal, 3a is an optical connector section with the modem 2, 3b is a light emitting section, and 3c is a light receiving section.

2 is a modem (or host computer).

2a is an optical connector section with the terminal device 3.

Signals ER, DR, RS°C of optical connector parts 2a and 3a
S, SD, RD, and CD are the same. Furthermore, since the terminal device main body 3 and the modem 2° have batteries inside, power is supplied directly to the optical connectors 2a and 3a from there.

ER-DR is delayed by DELAY, 4. This is because the switch circuit 5 is operated by the BR multiplied signal.
5 ■ There is a delay time until power is stably supplied to all circuits. Therefore, when the ER double signal is turned ON, all optical connectors 2a and 3a become operable. In modes other than the communication mode, the ER signals are set to 0 and ['F, which is a measure to reduce power consumption.

When the RS signal turns ON, the DELAY26 circuit operates,
The C8 signal is returned to the terminal. This DELAY2 circuit 6
In order to ensure a delay time (CD detection to be described later) on the other side's light receiving element side when the light emitting diode 12 emits light, the time from the R, S signal ON to the C8 signal ON is taken. On the terminal side 1, S is first turned on when the CS signal is turned on.
D times signal transmission data).

SD double signal NOT circuit 8. Through the AND circuit 7 and the limiting resistor R1, the transistor TR1 is controlled to turn on and off. Generally, the SD double signal LOW level is used as the mark signal. Said optical connector 3a.

3b is turned on when the light emitting diode 12 receives a mark signal. Therefore, when the SD multiplied signal is input, the light emitting diode 12 is turned off.

When data is to be received next, power is supplied to the light emitting diode 13 through the limiting resistor R2. Since the present invention considers that the mark signal normally emits light,
The light receiving diode 13 operates by receiving light. This signal is amplified by the operational amplifier AMPIO and the RD
It becomes a double signal. The CD signal is fixed by integrating the output part of the light receiving diode 13 with the integrating circuit 11 while receiving the data reception signal (RD multiplied signal. In this example, the CD signal is fixed by the NOT circuit 9. The signal becomes high level.The signal changes by RD times due to the operation of the light receiving diode.

According to this embodiment, (1) If the terminal device is directly connected to the modem and at the same time uses an optical connector, contactless data communication is possible through optical coupling.

(2) Since communication is possible under the same control as conventional modem communication (RS-2320), there is no need to change the terminal software.

(3) It can be constructed at low cost, and can be made lightweight, thin, and small for portable use.

It has the following advantages.

Effects of the Invention As described above, the present invention has an RS-232C interface, converts an ER multiplied signal delay signal into a DR multiplied signal, turns on and off all power supply circuits by the ER multiplied signal, and converts the delayed signal of the RS signal into a C8 signal. The light emitting diode is controlled by the AND of the RS signal and the SD multiplied signal, and the light emitting time of the light emitting diode is used as a mark signal.When the light receiving section receives the light, its integral value is used as the CD signal, and the amplified signal of the light receiving section is R
By providing the D-fold signal, high reliability with less wear on the connection parts can be obtained.

[Brief explanation of drawings]

Fig. 1 is an electrical system diagram of a connection device for a mobile terminal device according to an embodiment of the present invention, Fig. 2 is a perspective view of the same embodiment, Fig. 3 is a general RS-2320 signal connection diagram, and Fig. 4 is a general RS-
2320, and FIG. 5 is a perspective view of a conventional portable terminal device. 2...Modem, 2a...Optical connector part, 3...Terminal device body, 3a...Optical connector part, 4...DELAY
,,5...Switch circuit,6...D E L A Y
2.7・A, ND circuit, 8...NOT circuit, 9・NO
T circuit, 10・AMPl 11... Integral circuit, 12・
Light emitting diode, 13... light receiving diode. Name of agent: Patent attorney Toshio Nakao and 1 other person S
Figure 3 i1% unscorned tyotw: M/Ho5r happy figure 4

Claims (1)

[Claims] It has an RS-232C interface, the delayed signal of the ER signal is used as the DR signal, all power supply circuits are turned on and off by the ER signal, the delayed signal of the RS signal is used as the CS signal, and light is emitted by the logical product of the RS signal and the SD signal. For mobile terminal devices configured to control a diode, use the light emitting time of the light emitting diode as a mark signal, and when the light receiving section receives light, take the integral value as a CD signal, and use the amplified signal of the light receiving section as an RD signal. Connection device.