JPS5926465Y2 - sensor - Google Patents

Description

[Detailed description of the invention] The present invention connects a sensor head 2 having a sensor contact 1 and a base 3, and connects the base 3 to a receiver 4 and the next sensor 5 or a terminating resistor 6. In this sensor, two child terminals 7 or one terminal 8 connected to the receiver 4 are provided and connected to the next sensor 5 or terminating resistor 6 via the sensor head 2, and the sensor contact 1 This sensor is constructed by connecting an external confirmation light 9 via the base 3, which is activated by the operation of the sensor.

The purpose of this invention is to prevent theft by having the receiver detect this when the sensor head is removed and issue a disconnection alarm. The purpose is to make it visible from outside the room where the receiver or sensor is installed.

In the conventional sensor, as shown in Figure 1, a sensor head 2' having a sensor contact 1 and a base 3' are electrically connected with two terminals and connected to a receiver 4 by mechanically fitting them together. At the same time, connect it to the next sensor 5 or terminating resistor 6.

7' is a child terminal with a sending terminal, and 8' is a single terminal with a sending terminal.

In this case, even if the sensor head 2' is removed, it cannot be detected on the receiver 4 side, and it is impossible to tell which sensor has activated unless you go to the location where the sensor is installed. It had the disadvantage that it was not.

The present invention has been devised in view of this point, and will be described in detail below with reference to Examples.

In Fig. 2, 1 is a sensor contact, which is activated by smoke or heat, and is provided on the sensor head 2, and the sensor head 2 and the base 3 are electrically connected with 4 terminals, and the sensor contact point 1 is operated by smoke or heat. Connect them to each other.

Reference numeral 4 denotes a receiver, which issues an alarm or other alarm when the sensor is activated, and is connected to the base 3, to which the next sensor 5 or terminating resistor 6 is connected.

At this time, two terminals 8 are provided, one of which is connected to the receiver 4 and the other connected to the next sensor 5 or terminating resistor 6 via the sensor head 2.

Note that the terminating resistor 6 is connected to the terminal ends of all the sensors.

Reference numeral 9 denotes an external confirmation light, which is installed near the receiver 4 or outside the room where the sensor is installed, and is connected between the child terminal 7 and the auxiliary terminal 10, and is activated by the activation of the sensor contact 1. It is connected in parallel to a Zener diode ZD1 that is connected in parallel to a series circuit of a diode D and a resistor R1 that are connected in series to a switching element S that is turned on.

R2 is a resistor, and ZD2 is a Zener diode.

Now, when the sensor head 2 is removed from the base 3, one end 8,
Since the connection between terminals 8 and 8 is removed and current no longer flows to the terminating resistor 6, the receiver 4 can detect this and issue a disconnection alarm.

Further, when the sensor contact 1 operates, the switching element S is turned on, and the voltage across the resistor R1 increases, and a voltage equal to the Zener voltage is generated across the Zener diode ZD1.

Therefore, the external confirmation light 9 lights up to indicate that the sensor contact 1 has been activated, and it can be determined at a glance which sensor has activated.

In FIG. 3, two terminals 7 are provided, one of which is connected to the receiver 4, and the other connected to the next sensor 5 or terminating resistor 6 via the sensor head 2. 2
It has the same effect as shown in the figure.

As mentioned above, the present invention provides two positive terminals or one terminal connected to the receiver and connects them to the next sensor or terminating resistor via the sensor head, so the sensor head can be removed. The receiver can detect this and issue an intermittent alarm, which provides an anti-theft effect.Also, when an external confirmation light is connected via the base, which is activated by the operation of the sensor contact, it can be activated. This has the effect that the detected sensor can be identified from the outside of the room in which the receiver or sensor is installed.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a conventional sensor, FIG. 2 is a circuit diagram of one embodiment of the present invention, and FIG. 3 is a circuit diagram of another embodiment of the same. 1... Sensor contact, 2... Sensor head, 3...
Base, 4...Receiver, 5...Next sensor, 6...
・Terminal resistor, 7...ten terminals, 8...one terminal, 9...
・External confirmation light.

Claims (1)

[Scope of utility model registration request] In a sensor in which a sensor head having a sensor contact and a base are connected and the base is connected to a receiver and the next sensor or a terminating resistor, a child terminal or one terminal connected to the receiver. A sensor in which two sensors are provided and connected to the next sensor or a terminating resistor via the sensor head, and an external confirmation light activated by the operation of the sensor contacts is connected via the base.