JPS61196400A - Parsonal belongings slippage preventor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] It would be convenient if an alarm could be issued when an object that needs to be prevented from being left behind, such as a lost child, leaves a certain distance. Although there is a means of communication in the coverage area, there is no such method yet in place in the breakaway area. The present invention receives weak radio waves from a transmitting unit attached to an object at the receiving unit of the wearer when necessary, and issues an alarm when the transmitting unit leaves the receiving area, and is also equipped with a corresponding guarantee circuit. To explain this in more detail in the drawings, the transmitting section 1 is normally engaged with the receiving section 2 as one unit, and during that time, the circuit of the oscillating power source 3 and the circuit of the receiving power source 4 are connected.
The transmitting power circuit switch S1 and the receiving power circuit switch S2 are opened respectively, but the transmitter 1 and the receiver 2 are opened.
At the same time, each circuit is closed by a micro switch or the like, and the transmitter circuit 5 of the transmitter 1 is activated to transmit weak radio waves such as high frequency waves.At the same time, the receiver 2
The high frequency amplification circuit 6, the local oscillation circuit 7, the mixing circuit 8, the intermediate frequency amplification circuit 9, and the receivable detection circuit (squelch circuit or its equivalent circuit) 10, which constitute this circuit, operate to detect the receivable state of 0 and 1. The alarm is generated by the alarm sound generator 11 through the gate IC section I which detects the signal, and when the signal cannot be received, an alarm is issued.

Since the oscillation power supply circuit switch S of the transmitting section 1 can be turned off by pressing it manually, when the transmitting section 1 and the receiving section 2 are disconnected, press it.
When the alarm sound of the receiving part 2 does not sound, the power supply 3 of the transmitting part 1
Since it can be confirmed that the circuit is worn out, it is convenient for checking the guarantee circuit. Furthermore, since guaranteeing the receiving power source 4 is also important, the receiving section 2 is provided with an IC section I' for detecting the power supply voltage of the receiving power source 4 to detect the diode circuit H. (Ohmune 1
/2 voltage drop) In this way, the transmitter 1 is fixed to the object to be warned of to prevent detachment using the oscillator clip K, and the receiver clip K' is used to secure the receiver within the receiving range of the transmitter 1. 2 is fixed on the carrier side. For this reason, both power supply circuits are closed when the two are disengaged.If a pilot lamp or the like is installed to visually check the power supply voltage guarantee as shown in the diode circuit H on the receiving side, it will be possible to check the power supply voltage guarantee at an early stage. Guarantees can be made more certain by knowing the voltage drop through a continuous alarm.

In other words, when an alarm sounds, (1) the transmitting power supply is exhausted. (2) The receiving power supply has been exhausted. (3) The transmitting unit 1 has moved away from the receiving unit 2 and has entered an area where reception is not possible. Both are guaranteed to be on the safe side. In addition to dedicated ones with configurations such as using a water filter for oscillation and increasing detection accuracy with a squelch circuit, the receiver can also be used with a radio or L
An example of detection using the EO display function L is shown.
Alarm transmission A as a normal FM radio connection
This shows the T part.

In this way, as a preventive measure against things such as forgotten items, lost children, etc.
Its use is effective without violating the Radio Law, and it ultimately has no purpose.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of the present invention showing a state in which a transmitting section and a receiving section are combined. Figure 2 is a block diagram of the transmitting section, Figure 3 is a block diagram of the receiving section, Figure 4 is a diagram showing the alarm transmitting circuit of the receiving section, and Figure 5 is a diagram of the alarm transmitting circuit implemented as an attachment to an FM radio.

Claims (1)

[Claims] The transmitting section 1 is separated from the receiving section 2, the circuit of the oscillating power source 3 and the circuit of the receiving power source 4 are closed, and the high frequency oscillation circuit 5 is activated, and the oscillation of high frequency weak radio waves is captured by the receiving section 2 and is detected by the receivable detection circuit ( Squelch equivalent circuit) 10, and a device for preventing detachment of personal items, which is also equipped with a receiving power supply voltage drop detection section and connected to the alarm sound generation circuit 11.