JPH0579692U - Wireless transmitter for sensor - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a wireless transmitter for a sensor that can easily perform a test. [Structure] A printed circuit board 6 on which components for an RF circuit, a test circuit, and the like are mounted is attached between the upper lid 2 and the main body case 5, and a test reed switch 7 and an operation are mounted on the printed circuit board 6. The light emitting diode 8 which is sometimes turned on is mounted so as to closely approach and face downward. An illumination hole 5a for the light emitting diode 8 is formed in the body case 5 downward. When the magnet M approaches the reed switch 7,
The reed switch 7 is turned on and the light emitting diode 8 emits light.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wireless transmitter for a sensor, which wirelessly sends an alarm signal of the sensor in a disaster prevention system.

[0002]

[Prior Art]

 Generally, in a wireless disaster prevention system that wirelessly relays an alarm signal from a sensor, the so-called L (line) -C (common) line for connecting the sensor and the relay in the wired disaster prevention system must be omitted. Since the installation work can be simplified, the wireless system may be partially used in the wired disaster prevention system.

In a general wired disaster prevention system, a detector that detects a fire and sends an alarm signal by wire and a relay that relays the alarm signal from the sensor to the fire receiver by wire are used. If the interior work is done in a certain area and the L-C line between the sensor and the repeater in that area is disconnected, that area becomes a non-warning area. Therefore, a wireless transmitter that wirelessly sends a warning signal from the sensor and a wireless reception repeater that receives the warning signal from this wireless transmitter and sends it to the fire receiver are used.

Conventionally, when testing a wireless transmitter of this type, a reed switch for generating a pseudo state similar to that when a sensor sends an alarm signal is arranged in the wireless transmitter. Simultaneously, a magnet is placed in a cup-shaped jig that covers the sensor, and the maintenance person covers the sensor with this jig and brings the magnet close to the reed switch to turn on the reed switch. The method of operating it is adopted.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional test method, the maintainer places the magnet in the cup-shaped jig that covers the sensor close to the reed switch, so if the sensor and wireless transmitter are large or mounted on a high ceiling. If so, it is difficult to know the location of the reed switch and the test is difficult.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a wireless transmitter for a sensor, which can easily perform a test.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is a wireless transmitter for a sensor in which a sensor is detachably provided, and when a sensor operates, a magnet approaches the display means that lights downward. It is characterized by the provision of a test reed switch that is turned on by.

[0008]

[Action]

 According to the present invention, since the reed switch for testing is provided in the vicinity of the display means by the above configuration, the reed switch is turned on when the maintenance person brings the magnet close to the display means, and therefore the test is easily performed. be able to.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a wireless transmitter for a sensor of a wireless repeater according to the present invention, and FIG. 2 is a part showing a state in which the sensor is attached to the wireless transmitter for a sensor of FIG. FIG. 3 is a cutaway side view, and FIG. 3 is a circuit diagram showing a test circuit of the wireless transmitter for sensor of FIG. 1.

In FIG. 1, the wireless transmitter has a circular horizontal cross section so that a sensor 1 as shown in FIG. 2 can be attached and detached, and an upper lid 2 is attached to the ceiling side. Therefore, in FIG. 1, the upper and lower sides are shown upside down. A pair of brackets 3a and 3b for attaching to the ceiling are attached to the upper lid 2 via screws 4, and a battery storage portion 2a is formed.

The brackets 3a and 3b can be attached and detached by rotating the main body with respect to a bracket (not shown) that is attached to the ceiling side in advance, and can be attached to the sensor 1 as shown in FIG. It has the same structure as the bracket (not shown). Therefore, in a disaster prevention system that sends a warning signal from a sensor to a fire receiver via a relay, the sensor 1 is directly mounted on the ceiling, but this is the case when interior work is performed and the area is If the L-C line between the sensor and the repeater is disconnected, the sensor 1 is mounted on the ceiling via this wireless transmitter.

A printed circuit board 6 on which an RF circuit and components for a test circuit as shown in FIG. 3 are mounted is mounted between the upper lid 2 and the main body case 5 with screws 6 a. The test reed switch 7 and the light emitting diode 8 that lights up during operation are mounted close to each other so as to face downward (upward in the drawing). The light emitting diode 8 is controlled so as to light up, for example, when a fire is detected in the sensor 1, when a normal connection state is regularly transmitted to a wireless receiver, or when a radio wave propagation test is performed. The printed circuit board 6 is also formed with an opening 9 for attaching and detaching a battery, and an antenna 10 is attached by a screw 12 via a lug 11.

The body case 5 is formed with an illumination hole 5 a of the light emitting diode 8 and a recess 13 into which the sensor 1 can be fitted. The recess 13 is formed with an opening 14 for attaching and detaching a battery. The body case 5 is attached to the upper lid 2 with screws 5b. The opening 14 of the main body case 5 and the opening 9 of the printed circuit board 6 are covered with a battery lid 15 so that a battery (not shown) does not drop from the battery housing portion 2a of the upper lid 2, and the battery lid 15 is screwed. It is fixed to the upper lid 2 by.

The body case 5 is also provided with brackets 17 a, 17 b, 18 a to 18 c that are engageable with a bracket (not shown) attached to the sensor 1 side in the same configuration as the brackets 3 a and 3 b of the upper lid 2. The brackets 17a, 17b, 18a to 18c are made of a conductive material so as to also serve as a connector to the sensor 1. The brackets 17a and 17b are attached by screws 19 so that they can be engaged with one bracket (see bracket 3a) on the sensor 1 side, and the brackets 18a and 18b are the other brackets on the sensor 1 side (bracket 3b). It is attached by a screw 20 so that it can be engaged with (see reference). The bracket 18c is attached with screws 21.

When the sensor 1 is attached to the wireless transmitter after the wireless transmitter is attached to the ceiling, the illumination hole 5a of the light emitting diode 8 is arranged so as to face downward as shown in FIG. To be done. Next, the electrical configuration of the sensor 1 and the wireless transmitter thus mounted will be described with reference to FIG. The sensor 1 is composed of a switch component which is turned on when heat or smoke is detected, and a series resistance component with respect to this switch component, and a predetermined voltage is applied to this series circuit by a transmission circuit 22.

Therefore, when the switch component is turned on, the voltage across the series circuit fluctuates, so that the transmission circuit 22 transmits an alarm signal to the wireless reception repeater 30. The wireless reception repeater 30 transmits this alarm signal to the fire receiver 31 by wire, and the fire receiver 31 displays information according to the installation locations of the sensor 1 and the wireless transmitter. Further, when the sensor 1 operates in this way, the transistor 23 is turned on by the control of the transmission circuit 22 and the light emitting diode 8 emits light.

A reed switch 7 and a resistor R for testing whether or not the radio receiver operates normally are connected in series, and a predetermined voltage is applied to the series circuit by the transmission circuit 22. A constant voltage is applied to the light emitting diode 8. Therefore, when the magnet M approaches the reed switch 7, the reed switch 7 is turned on, the same voltage as when the sensor 1 is activated is detected by the transmission circuit 22, and the alarm signal is sent to the wireless reception repeater 30. Sent.

In this case, since the transistor 23 is turned on and the light emitting diode 8 emits light, the maintenance person can confirm that the wireless transmitter operates normally. Therefore, according to the above-described embodiment, when the sensor 1 and the wireless transmitter are mounted on the ceiling of the monitoring area, the illumination hole 5a of the light emitting diode 8 faces downward, so that the maintenance person can move down this place. It can be easily confirmed from the above, and since the reed switch 7 is attached near the light emitting diode 8, the maintenance person can carry out the test only by bringing the magnet M near the light emitting diode 8. ..

An appropriate detector for fire, gas, etc. is connected to the detector.

[0020]

[Effect of the device]

 As described above, according to the present invention, since the test reed switch is provided close to the display means, the lead switch is turned on when the maintenance person brings the magnet close to the display means. Testing can be done easily. To issue a test, it is sufficient to check the display means to see if radio waves are being output, and it is easy to confirm the report during the test.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a wireless transmitter for a sensor of a wireless repeater according to the present invention.

2 is a partially cutaway side view showing a state in which a sensor is attached to the wireless transmitter for sensor of FIG.

FIG. 3 is a circuit diagram showing a test circuit of the wireless transmitter for sensor of FIG.

[Explanation of symbols]

1: Sensor 2: Upper lid 2a: Battery storage 3a, 3b, 17a, 17b, 18a-18c: Brackets 4, 5b, 6a, 12, 16, 19-21: Screws 5: Main body case 6: Printed circuit board 7: Reed switch 8: Light emitting diode 9, 14: Opening 10: Antenna 11: Lug 13: Recessed portion 15: Battery lid 22: Transmission circuit 23: Transistor 30: Wireless reception repeater 31: Fire receiver R: Resistance

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[Procedure amendment]

[Submission date] April 24, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

Claims (1)

[Scope of utility model registration request] 1. A wireless transmitter for a sensor, wherein the sensor is detachably provided, and is turned on by approaching a magnet in the vicinity of a display means that lights downward when the sensor operates. A wireless transmitter for a sensor, which is provided with a reed switch for the sensor.