JPH0534731U - Transmitter that emits a radio signal in an emergency - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a transmitter that emits a radio signal in an emergency when a switch is turned on under a specific condition even if a manual switch is not operated, and a radio wave is automatically generated. A transmitter 10 provided with an antenna 28, which emits radio waves from the antenna 28 by turning on a switch means 13, the transmitter 10 having an earthquake-proof structure, and the switch In addition to the manual switch 16, the means 13 has an acceleration detection switch 17 which is turned on by detecting an acceleration of a certain level or more.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transmitter that emits a radio signal in an emergency.

[0002]

[Prior Art]

 If you encounter a danger that may pose a threat to human life or your body, a wireless signal is emitted from a portable transmitter, which the base station receives and applies the principle of triangulation to determine the position of the sender. The applicant of the present invention has proposed a method for detecting the above-mentioned problem in Japanese Patent Application Laid-Open No. 64-66581.

[0003]

[Problems to be solved by the device]

 However, in the technique described in the above-mentioned publication, it does not work unless the user presses the switch of the transmitter, and when the thug discovers the transmitter and picks it up or throws it away, There was a problem that radio waves could not be emitted. In addition, in some cases, there was the inconvenience that the thief would not operate if taken and thrown into the sea, pond, or river. The present invention has been made in view of such circumstances, and a transmitter that emits a radio signal at an extraordinary time when the switch is turned on under certain conditions even if the manual switch is not operated and the radio wave is automatically generated. The purpose is to provide.

[0004]

[Means for Solving the Problems]

 The transmitter for emitting a radio signal in an emergency according to claim 1, wherein the transmitter is provided with an antenna, and a radio wave is emitted from the antenna by turning on a switch means. The machine has an earthquake-resistant structure, and the switch means includes not only a manual switch but also an acceleration detection switch that is turned on by detecting an acceleration of a certain level or more. The transmitter for transmitting a radio signal in an emergency according to claim 2 is the transmitter according to claim 1, wherein the transmitter has a waterproof structure and a buoyancy generator is provided on the upper part of the transmitter. It has a structure that floats even when immersed in. The transmitter for emitting a radio signal in an emergency according to claim 3 is the transmitter according to claim 2, wherein the switch means includes a water input detection switch in addition to a manual switch. Here, the water entry detection switch is a switch that operates when the transmitter is immersed in the sea, river, or lake.

[0005]

[Action]

 In the transmitter that emits a radio signal in an emergency according to claim 1, since the transmitter has an earthquake-resistant structure, the inside is not destroyed by being dropped or usually thrown away. Then, for example, when a thug picks it up and throws it away, acceleration acts, which activates the acceleration detection switch and transmits radio waves. The transmitter for transmitting a radio signal in an emergency according to claim 2 has a further waterproof structure and is provided with a buoyancy generating portion on the upper part, so that it will float on water. In this case, an antenna is also provided on the upper part. By leaving it, the switch means can be activated to transmit on the water and can also be a lifesaving signal in case of drowning. The transmitter which emits a radio signal in an emergency according to claim 3 is provided with a water inlet switch, so that when the transmitter is put in water, the outside water is detected and the switch means of the transmitter is activated. To do.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. 1 is a perspective view of a transmitter that emits a radio signal in an emergency according to the first embodiment of the present invention, and FIG. 2 is a transmitter of a transmitter that emits a radio signal in an emergency according to the second embodiment of the present invention. 3 is a partial cross-sectional view, FIG. 3 is a schematic circuit diagram of a transmitter for emitting a radio signal in an emergency according to the first embodiment, and FIG. 4 is a transmission for emitting a radio signal in an emergency according to a third embodiment of the present invention. It is a perspective view of a machine.

As shown in FIGS. 1 and 3, a transmitter 10 for emitting a radio signal in an emergency according to a first embodiment of the present invention includes a transmitter main body 11 including an electric circuit, a battery 12 and a switch means. 13 and an outer case 14. These will be described in detail below. The transmitter 10 has a well-known structure, has a memory inside, and emits a specific identification code from an antenna 28 attached to the transmitter main body 11. This identification code may be stored and transmitted together with the user's gender, date of birth, name, and other data, but these data may be stored in the computer of the receiver. Since it is good, it is sufficient to provide an identification code for distinguishing a plurality of transmitters. As the radio wave for transmitting the identification code, a radio wave such as HF, VHF, UHF, or SHF is used, and the encoded signal is FM-modulated, but AM, SSB, PM modulation may be used. ..

A battery 12 and switch means 13 are connected in series to the transmitter body 11. The switch means 13 includes a thyristor 15, a manual switch 16 for giving a signal to the gate of the thyristor 15, an acceleration detection switch 17 and a water entry detection switch 18, which are connected in parallel. Reference numeral 19 is a limiting resistance, 20 is a discharge resistance, 21 is a capacitor for preventing malfunction, and 22 is a transmission stop switch. The manual switch 16 is composed of a normal push button switch and is attached to a part of the outer case 14 without protruding. When the button is pressed with a finger, the thyristor 15 rolls and the switch means 13 is turned on. Electric power is supplied from the battery 12 to the transmitter.

The acceleration detection switch 17 is composed of an impact sensor using ceramic, crystal, Roche's salt, or a semiconductor, and is turned on when acceleration of 3 G (preferably 5 G) or more occurs in the vibration sensor. Is designed to generate the output of. The acceleration detection switch 17 can be configured by another means. For example, when a weight is attached to the tip of a rod having one end fixed and a strain gauge stretched in the middle, and the acceleration of gravity is applied, Acceleration acts on the weight and stress is generated in the strain gauge stretched on the rod, so the stress generated by the strain gauge is detected by the bridge circuit, and a closed output is generated when the detected value exceeds a certain value. You may choose to do so.

Further, as shown in FIG. 1, the water intrusion detection switch 18 is formed by providing a recess 23 in a specific portion of the outer case 14 and having electrodes 24 and 25 projecting into the recess 23. When the transmitter 10 enters the water, electricity is passed through the water to call the thyristor 15. In addition, when the transmitter 10 is lifted from the water, the water in the recess 23 disappears, so that the water leakage detection that flows along the water adhering to the outside is sufficiently small. It is also possible to connect a suitable resistor in series with the switch 18. On the other hand, the transmission stop switch 22 is provided on the outer case 14, and by pushing the transmission stop switch 22, the current of the thyristor 15 is once cut off and the thyristor 15 is turned off.

The outer case 14 is composed of a lower case 26 in which the transmitter body 11 and the battery 12 are housed, and an upper case 27 which is closely fitted to the upper part of the lower case 26. It is made of metal or plastic with sufficient strength to withstand impact. The upper case 27 is made of a plastic that allows radio waves to pass through, and has an antenna 28 and a styrofoam 29, which is an example of a buoyancy generator, built-in inside. The antenna 28 part floats and projects above the water surface. In addition, the manual switch 16 and the transmission stop switch 22 attached to the lower case 26 have a waterproof structure, and further, the lid 30 of the battery storage part has a waterproof structure so that water cannot completely enter the inside. Is becoming

FIG. 2 shows a partial cross section of a transmitter 31 which emits a radio signal in an emergency according to the second embodiment. As shown in the figure, a space 32 is used as a buoyancy generating portion and is made of plastic. The upper case 33 and the lower case 34 are completely water-sealed. Reference numeral 35 is an antenna, 36 is an O-ring, and 37 is a set screw.

FIG. 4 shows a transmitter 38 that emits a radio signal in an emergency according to the third embodiment of the present invention, and as shown in the figure, the transmitter 38 has an overall cylindrical shape. In the figure, 39 is an antenna, 40 is a manual switch, 41 is a water entry detection switch, and 42 is a transmission stop switch. Other structures are substantially the same as those of the above-mentioned embodiment. The upper case 43 and the lower case 44 may be joined by screw connection, or may be joined by screws separately provided.

In the above embodiment, a receiver for interlock is provided to prevent the transmitter that emits a radio signal in the emergency from transmitting when another transmitter is operating. Be free. Furthermore, it is free to downsize the entire device or change the shape of the outer case. Further, although the thyristor is used as the switch means, a substitute (for example, triac) or a circuit (flip-flop circuit or the like) instead of the thyristor may be freely used.

[0015]

[Effect of the device]

 As is apparent from the above description, the transmitter that emits a radio signal in an emergency according to claims 1 to 3 is provided with an acceleration detection switch, so that a transmitter that emits a radio signal in an emergency can be used as a thug. It works when it is picked up and thrown away, or when the transmitter is thrown out by itself. As a result, the body can be protected more safely. Since the transmitter for emitting a radio signal in an emergency according to claim 2 has a buoyant body inside, it is floated and emits an emergency signal even when placed in water. This makes it possible to send an emergency signal without any trouble even if it is picked up by a thug and thrown into the water. Further, in the transmitter which emits a radio signal in an emergency according to the third aspect, since the water input detection switch is provided, the emergency signal is transmitted just by putting it in water. As a result, it will operate even if it is taken up by a thug and thrown away in a river or the sea.

[Brief description of drawings]

FIG. 1 is a perspective view of a transmitter that emits a radio signal in an emergency according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of a transmitter that emits a radio signal in an emergency according to a second embodiment of the present invention.

FIG. 3 is a schematic circuit diagram of a transmitter that emits a radio signal in an emergency according to the first embodiment.

FIG. 4 is a perspective view of a transmitter that emits a radio signal in an emergency according to a third embodiment of the present invention.

[Explanation of symbols]

 10 Transmitter that emits a radio signal in an emergency 11 Transmitter body 12 Battery 13 Switch means 14 Outer case 15 Thyristor 16 Manual switch 17 Acceleration detection switch 18 Water entry detection switch 19 Limiting resistance 20 Discharge resistance 21 Condenser 22 Transmission stop switch 23 Dimple 24 Electrode 25 Electrode 26 Lower Case 27 Upper Case 28 Antenna 29 Styrofoam 30 Lid 31 Transmitter that emits radio signal in an emergency 32 Space 33 Upper case 34 Lower case 35 Antenna 36 O-ring 37 Set screw 38 Transmitter 39 antenna that emits a radio signal in an emergency 40 Manual switch 41 Water entry detection switch 42 Transmission stop switch 43 Upper case 44 Lower case

Claims (3)

[Scope of utility model registration request] 1. A transmitter provided with an antenna, which emits radio waves from the antenna by turning on the switch means, wherein the transmitter has a seismic resistant structure, and the switch means is In addition to a manual switch, a transmitter that emits a wireless signal in an emergency, which has an acceleration detection switch that is turned on by detecting an acceleration of a certain level or more. 2. The transmitter for transmitting a radio signal in an emergency according to claim 1, wherein the transmitter has a waterproof structure and further has a buoyancy generating portion provided on an upper portion thereof so as to float even if the transmitter is immersed in water. Machine. 3. The transmitter for emitting a radio signal in an emergency according to claim 2, wherein the switch means includes a water input detection switch in addition to a manual switch.