JP7475073B2 - Water rescue signal transmitter - Google Patents

Description

The present invention relates to a water rescue signal transmitter that is very small and lightweight, can be worn on the body, and can transmit the location of a water accident (the location where water rescue is required) via radio waves. This water rescue signal transmitter can automatically transmit a water rescue signal to request reliable rescue from rescue teams or emergency services if, for example, someone falls into the water from a boat or shore or is nearly drowned while working alone or away from a group near water such as the sea, a lake, or a river.

Conventionally, there is known a water rescue signal transmitter that is mounted on a ship or aircraft and transmits a rescue signal including location information (GPS information) when the ship or aircraft encounters an accident. When a ship or aircraft encounters a water accident, it is necessary to detach the transmitter from the submerged hull or aircraft and bring it to the surface near the water surface to call for rescue.

JP 2018-001811 A JP 2003-231494 A

When a ship or aircraft encounters a water accident, there are many people on board the ship or aircraft, and since there are many people around at the time of the accident, it is possible to call for rescue by sending some kind of signal. However, when working or swimming alone near water such as the sea, lake, or river, or when fishing or swimming away from the shore, there is no one around, so it is very difficult to call for rescue if you fall off the ship or shore or nearly drown. There are also cases where you have to work in dangerous areas or at times such as during rough seas or storms, and in such situations it is important to call for rescue quickly even if you are stranded.

The present invention was made in light of the above-mentioned circumstances, and the purpose of the present invention is to provide a water rescue signal transmitter that is small and easily attached to the body, allowing a person to call for rescue almost automatically, even if they are lost alone in the sea or a lake.

The present invention relates to a water rescue signal transmitter that transmits a water rescue signal in the event of a distress. The above object of the present invention is achieved by the fact that the device is composed of a base part that can be attached to the body and a floater that has a transmitter and is magnetically engaged with the base part, and when submerged in water, the floater separates from the base part and rises to the surface of the water to transmit a water rescue signal from the transmitter.

The water rescue signal transmitter of the present invention is very small and lightweight, and can be easily attached to the body or a life jacket, etc. Even if a water accident occurs, the antenna can be almost automatically floated above the water surface and a water rescue signal can be automatically transmitted, allowing rescue teams and other help to be quickly and reliably requested.

1 is an external view showing an example of a water rescue signal transmitter of the present invention (with cover); FIG. 4 is an exploded view showing the relationship between a cover housing and a main body portion. 4 is an exploded external view showing the relationship between a cover housing, a floater, and a base portion. FIG. 11 is a partial cross-sectional view showing an example of mounting the cover housing to the base portion. FIG. FIG. 4 is a schematic diagram for explaining the function of a floater. FIG. 2 is a schematic wiring diagram showing an example of operation of the water rescue signal transmitter of the present invention. FIG. 2 is an external view showing the positional relationship between the floater and the base portion. 13 is an external view showing another example of a water rescue signal transmitter of the present invention (without cover). FIG. 3 is a cross-sectional view showing an example of X-X' in FIG. 2. A cross-sectional structure diagram showing another example of X-X' in Figure 2. FIG. 2 is a cross-sectional view showing a cross-sectional structure of a wire. 13 is an external view showing an example of a structure for engagement between a base portion and a floater. FIG. FIG. 4 is a cross-sectional view showing the details of an engagement portion. 1A and 1B are diagrams illustrating examples of the structure of an antenna. FIG. 13 is a mechanical diagram (external) showing an example of automatic erection of an antenna. FIG. 13 is a mechanical diagram (interior) showing an example of automatic erection of an antenna. 1 is a wiring diagram showing an example of a circuit configuration of a water rescue signal transmitter according to the present invention. FIG. 13 is a diagram showing the content of a water rescue signal. 4 is a flowchart showing an operation example of the present invention. 13A and 13B are structural diagrams showing other structural examples of the separation mechanism between the base portion and the floater. FIG. 11 is a diagram showing another example of a mechanism for automatically erecting an antenna. 13 is a structural diagram showing yet another structural example of the separation mechanism between the base portion and the floater. FIG. FIG. 4 is a perspective view showing a specific structural example of a separation mechanism.

The present invention is a device that automatically raises a transmitter that emits a water rescue signal to the surface of the water and activates it when a person accidentally falls or falls into water near a body of water such as the sea, a lake, or a river, or when the person is about to drown while swimming or diving (hereinafter simply referred to as "disaster" or "drowning accident"). The device of the present invention is a water rescue signal transmitter that is very small and lightweight and can be easily attached to the arm or a life jacket, and transmits the location of the water accident to a rescue team by radio waves. The water rescue signal transmitter of the present invention is composed of a fixed part (hereinafter referred to as "base part") that is attached to the human body or a life jacket, and a floating part (hereinafter referred to as "floater") that is arbitrarily or automatically separated from the fixed part and rises to the surface of the water and is automatically put into a transmitting state by a transmitter such as a transmission circuit or an antenna, and the floater is magnetically engaged (connected) to the base part under normal circumstances. The base part and the floater constitute the main body, and under normal circumstances, the main body is covered by a cover housing that covers the entire exterior of the main body to protect or protect the device. The cover housing is not necessary.

In the event of a disaster such as falling into the water, the cover housing is removed by the victim's arbitrary operation or by the impact of the disaster, and the floater is separated from the base by the impact of the disaster or the natural dissolution of the stopper by water (including seawater, but hereafter simply referred to as "water"), and the floater rises to the surface and automatically enters a transmitting state. The base is attached to the human body or a life jacket, and even when the floater is separated, the base and the floater are connected by wires or strings such as wires or ropes that are strong enough not to cause harm to the human body, so that the floater will not move away from the base (victim) due to wind or water currents, and the floater that has risen to the surface will automatically transmit a water rescue signal by radio from a fixed position. This allows rescue teams to easily reach the location of the disaster and rescue the victim.

The water rescue signal transmitter of the present invention is attached to the body or a life jacket by a belt or a string, and the floater floats on water. The separated floater and the base are connected by a safe wire or the like, so that the floater transmitter in the same position as the victim can transmit a water rescue signal over a range of several kilometers to several tens of kilometers, and the rescue team that receives the signal can identify the victim's location and perform a reliable rescue. The floater and the base are engaged by the magnetic attraction and the pressing force of the holding member, and can be separated at will by the victim's hands, and the magnetically attracted engagement part is pushed apart by the impact of submersion or the elution of water, and the floater and the base are automatically separated. The floater is equipped with a folding antenna that uses spring elasticity, and when it comes off the holding member or by the restoring force of the spring wire, the antenna automatically extends linearly upward and stands up, and is positioned at a sufficient position above the water surface. This allows the transmission distance of radio waves to be extended. Even if the user accidentally removes the holding member, the antenna can be folded and rolled up, and held by the holding member to stop the operation and restore the device, making it a simple structure.

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 shows an example of the appearance of a water rescue signal transmitter 100 of the present invention, with the main body covered by a cylindrical cover housing 110 and two bands 101 and 102 connected to either side of the base part 130 of the main body, allowing it to be worn on the arm of a human body, a life jacket, etc.

Figure 2 shows the engagement relationship between the cover housing 110 and the main body (base part 130 + floater 120), and the entire main body is covered by the cover housing 110, which can be detached from above. Figure 3 shows the separation relationship between the cover housing 110, floater 120, and base part 130. That is, the main body is composed of the disk-shaped base part 130, which is wrapped around the arm of the human body by bands 101 and 102 and worn, and the disk-shaped floater 120, which is installed on the upper surface of the base part 130 and engaged with it, and the cylindrical cover housing 110 covers the entire main body from above. In the event of a drowning accident, the cover housing 110 is first removed as shown in Figure 3, and then the floater 120 is separated from the base part 130, and the floater 120 rises to the water surface as shown in Figure 5, and the antenna 140 erected by the fixed part 121 automatically transmits the drowning rescue signal WHw by radio wave.

The engagement relationship between the cover housing 110 and the base part 130 is as shown in FIG. 4, and a neodymium magnet (NdFeB) 111 is attached to the entire circumference or part of the bottom surface of the cover housing 110. A water-soluble plastic sheet 136 is arranged and fixed on the upper surface of the base part 130, and a magnetic engagement part 137 is provided on the upper surface of the plastic sheet 136 facing the neodymium magnet 111. Normally, the neodymium magnet 111 and the engagement part 137 are magnetically coupled, and the cover housing 110 is magnetically engaged with the base part 130. If the cover housing 110 is dropped into water, the water-soluble plastic sheet 136 will dissolve, and the neodymium magnet 111 and the engagement part 137 will be separated from the base part 130 together while still magnetically coupled, and the cover housing 110 will fall off the base part 130.

Figure 6 shows a schematic diagram of how the water rescue signal WHw is transmitted in the event of a water accident, in which the cover housing 110 is separated and removed from the main body due to the dissolution of the plastic sheet 134, and the floater 120 is then separated from the base 130, and the floater 120 connected by wire 133 to the base 130 worn on the arm of a person in the water rises to the surface, and the water rescue signal WHw is transmitted by radio waves from the antenna 140 at the tip of the spring wire 141 standing up from the fixed part 121 on the top surface of the floater 120. Figure 7 shows how the floater 120 is separated from the base 130, and the spring wire 141 stands up from the top surface of the floater 120.

The wire 133 is long enough to cover the depth from the water surface to the victim (e.g., about 10 m deep), and is adjusted so that the floater 120 does not fail to rise to the surface.

Although the above describes the case where the cover housing 110 is present, the cover housing 110 may be omitted, in which case the external configuration is as shown in Figure 8.

Figure 9 shows the cross-sectional structure along line X-X' in Figure 2, and the structures of the floater 120 and base portion 130 will be explained with reference to this cross-sectional structure.

The base part 130 has a base body 131 with a circular, flat upper surface, and two long bands 101 and 102 made of fabric, synthetic leather, rubber, etc. are attached to both sides of the base body 131. As described below, a neodymium magnet (NdFeB) 134 is embedded inside the upper part of the base body 131. In addition, a pair of elastic partition-like holding members 132A and 132B are suspended from the end of the upper surface of the base body 131, and the upper parts of the holding members 132A and 132B press against the sides of the floater 120 to hold it.

The floater 120 is a disk-shaped structure that is separably engaged with the upper surface of the base body 131 by magnetic coupling, and is held by pressing both sides with the holding members 132A and 132B. An iron piece 124 is provided at the opposing portion as a magnetic material that magnetically couples with the neodymium magnet 134 of the base body 131. Furthermore, a battery 151 is embedded in the floater 120, and a transmitting circuit 150 connected to the battery 151 is embedded therein. Furthermore, a microswitch 122 that automatically commands the start of the transmitting circuit 150 is provided protruding from the upper surface as a switch means. The contact portion of the microswitch 122 is waterproof and engages with the upper surface of the base body 131. Normally, that is, when the floater 120 is engaged with the base portion 130, the contact is "OFF", and when the floater 120 is separated from the base portion 130, the contact is "ON".

Since the floater 120 needs to float on the water surface as shown in Figures 5 and 6, the material itself must have a lower specific gravity than water, or a sealed cavity must be formed to provide buoyancy. A wire 133 is wound and stored in the cavity 123 at the bottom of the floater 120 to mechanically prevent the floater 120 from being separated from the base part 130 by a predetermined distance (for example, 10 m). Furthermore, an antenna 140, a spring wire 141 that automatically raises the antenna 140, and an antenna lead 152 that covers the spring wire 141 are wound around the side of the floater 120, and when the floater 120 is separated from the base part 130, the spring action of the spring wire 141 causes the antenna 141 to automatically rise from the fixed part 121. A water rescue signal WHw is transmitted by radio from the antenna 140 that has risen from the fixed part 121.

The structural example in FIG. 9 shows a case where the transmitter circuit 150 is provided in the floater 120, but as shown in FIG. 10, the battery 151 and transmitter circuit 150 may be provided in the base part 130. In this case, the microswitch 122 is provided protruding from the upper surface of the base part 130, and the wire 133 needs to be made into a waterproof pipe as shown in FIG. 11, and a lead wire 133A for transmitting an electrical signal needs to be laid inside. In the structural example in FIG. 10, it is necessary to transmit a water rescue signal WH from the base part 130 to the floater 120 via the lead wire 133A, and a wire with a special structure needs to be used, so the structure in FIG. 9 is structurally more preferable.

In both cases, the neodymium magnet 134 is provided on the base 130, and the iron piece 124 is provided on the floater 120. However, the magnetic coupling structure may be reversed, with the iron piece 124 provided on the base 130 and the neodymium magnet 134 provided on the floater 120.

Figure 12 shows an example of the magnetic coupling (engagement) mechanism between the floater 120 and the base portion 130, and Figure 13 shows a detailed cross-sectional structure of part of the engagement portion. In this example, four neodymium magnets 134A-134D are embedded in the upper peripheral portion of the base body 131 of the base portion 130, and iron pieces 124A-124D are disposed as magnetic material on the bottom surface of the floater 120 at positions corresponding to these neodymium magnets 134A-134D. The neodymium magnets 134A-134D do not have to be embedded, and the magnet surface may be flush with the upper surface of the base body 131. A separating plastic sheet 135 is disposed between the neodymium magnets 134A-134D and the iron pieces 124A-124D. The plastic sheet 135 has the effect of weakening the strength of the magnetic bond between the neodymium magnets 134A-134D and the iron pieces 124A-124D, but under normal circumstances the magnetic attraction maintains the engagement between the floater 120 and the base 130. The attraction is adjusted by the thickness of the plastic sheet 135 so that the force is strong enough that a victim can easily pull them apart, but also strong enough that they will naturally separate due to the impact of falling into the water.

The magnetic bonding strength and ease of separation are influenced not only by the thickness of the plastic sheet 135, but also by the characteristics of the neodymium magnets 134A-134D and the iron pieces 124A-124D, and are adjusted based on the overall characteristics of these.

Figure 14 shows an example of the structure of the antenna 140, in which the antenna 140 is connected to the tip of a spring wire 141 and is also connected to an antenna lead 152 that is connected to a transmitting circuit 150. That is, the outside of the spring wire 141 is covered with an antenna lead 152 wound in a spiral shape, and the antenna 140 is mechanically connected to the spring wire 141 and electrically connected to the transmitting circuit 150 by the antenna lead 152. This allows the antenna 140 to automatically stand up, and allows the water rescue signal WH from the transmitting circuit 150 to be transmitted from the antenna 140 via the antenna lead 152.

Figures 15 and 16 show an example of the mechanism for automatically raising the antenna 140, with Figure 15 showing the exterior and Figure 16 showing the internal structure of the floater 120. Normally, as shown in Figures 15(A) and 16(A), the antenna 140 and antenna lead 152 (spring wire 141) are wound around the side of the floater 120 and are pressed and held on both sides by the holding members 132A and 132B, but when the holding members 132A and 132B are removed, as shown in Figure 15(B), the restoring force of the spring wire 141 releases the antenna 141 and antenna lead 152 (spring wire 141) outward. Since the spring wire 141 is engaged with the upper surface of the floater 120 at the fixed part 121 (support point F1), the antenna 140 and antenna lead 152 (spring wire 141) are then automatically raised to a vertical state to the fixed part 121 as shown in Figure 15(C). Note that the antenna lead 152 is omitted in FIG.

Figure 16 shows the internal structure of the floater 120, in which a spring portion 143 is formed wound between support points F1 and F2. The holding positions of support points F1 (fixed point 121) and F2 are fixed, but support point F1 is movable relative to the spring wire 141, that is, the spring wire 141 can freely move the position of support point F1. Normally, the spring portion 143 is at position P1, and the antenna 140 is wound around the side of the floater 120 together with the antenna lead 152. When the antenna 140 is released from the holding members 132A and 132B, the spring wire 141 moves upward relative to the support point F1 with one end held by the support point F2 due to the restoring force of the spring portion 143, so that the antenna 140 automatically stands up on the top surface of the floater 120 as shown in Figure 16 (B).

Figure 17 shows the wiring relationship of the electrical system. When the microswitch 122 is "ON", the power of the battery 151 is supplied to the transmission circuit 150, and the microswitch 122 is normally "OFF". In other words, it is a normally OFF microswitch. When the contact of the microswitch 122 is "ON", the transmission circuit 150 is supplied with power from the battery 151, and the built-in processing circuit, oscillation circuit, amplifier circuit, etc. are automatically started, and a specified water rescue signal WH is output. The water rescue signal WH is transmitted to the antenna 140 via the lead wire and antenna lead 152, and the water rescue signal WHw is transmitted from the antenna 140 by radio wave. As shown in Figure 18, the water rescue signals WH and WHw contain at least the ID, which is the unique ID of the transmitter, and the location information by GPS. The rescue team receives the water rescue signal WHw and can head to the water rescue site based on the ID and location information contained in it.

The battery 151 is provided on the float 120 in the configuration of FIG. 9, and on the base portion 130 in the configuration of FIG. 10. In either case, it is convenient to provide the battery 151 on the transmitting circuit 150 side. It is also preferable that the battery 151 be rechargeable from an external source.

An example of the operation of this configuration will be explained with reference to the flowchart in Figure 19.

As shown in Figure 2, when the floater 120 is engaged with the base part 130, the contact of the microswitch 122 is "OFF" in both Figures 9 and 10, and the transmission circuit 150 is in a stopped state (step S1). Then, when it is dropped into water, an impact occurs (step S2), and the cover housing 110 is automatically removed due to the impact or the water-soluble plastic sheet 134 dissolving (step S3), and the floater 120 is automatically separated from the base part 130 by the peeling action of the plastic sheet 135 (step S4). When the floater 120 is separated from the base part 130 as shown in Figures 3 and 6, the contact of the microswitch 122 becomes "ON" (step S5). In some cases, the victim may manually separate the cover housing 110 and floater 120 from the base 130, but the bonding force, which is adjusted by the thickness of the plastic sheet 135, is attenuated by the impact of falling into the water, and the floater 120 is automatically separated from the base 130 when water enters or enters the body.

When the floater 120 is removed from the holding member 132 and separated from the base 130, the floater 120 rises in the water by buoyancy while still connected to the wire 133, and finally rises to the water surface, and the antenna 140 automatically stands up as described in Figures 15 and 16 (step S6). When the floater 120 is separated from the base 130, the contact of the microswitch 122 becomes "ON" in both cases of Figures 9 and 10. This causes power to be supplied from the battery 151 to the transmitting circuit 150, which automatically starts up (step S7). When the transmitting circuit 150 is started up, the transmitting circuit 150 transmits and transmits a water rescue signal WH (step S8), which is transmitted to the antenna 140 via the antenna lead 152, and the antenna 140 transmits a water rescue signal WHw by radio (step S9).

In the above embodiment, we have described a case where the floater 120 is automatically separated from the base part 130 due to the impact of falling into water, etc., but an embodiment that mechanically ensures separation will be described with reference to Figure 20.

This example shows the use of a solid water-soluble stopper 161, with Fig. 20(A) showing the normal connected state and Fig. 20(B) showing the state where the stoppers are automatically separated after falling into water. For example, in the case of Fig. 12, such a mechanism is provided at each engagement point between the neodymium magnets (132A-132D) and the iron pieces (124A-124D), and they are simultaneously separated at each engagement point.

For example, a linear tension spring 164 is disposed between the neodymium magnet 132A (base portion 130) and the iron piece 124A (floater 120), and the end 164A of the tension spring 164 is held (fixed) by a solid water-soluble stopper 161. The tension spring 164 has a tension torque in the right direction as shown in the figure. The tension spring 164 between the neodymium magnet 132A and the iron piece 124A is covered with a lead portion plastic sheet 163, and further, a permalloy magnet canceller sheet 162 is connected to and covered by the water-soluble stopper 161, and a wedge-shaped separator 160 is attached to the permalloy magnet canceller sheet 162.

As shown in FIG. 20(A), under normal circumstances, the end 164A of the tension spring 164 is held (fixed) by the solid water-soluble stopper 161, so that the neodymium magnet 132A and the iron piece 124A are magnetically engaged by sandwiching the lead plastic sheet 163 between them. However, if the water rescue signal transmitter 100 is submerged in water due to a drowning accident or the like, the water-soluble stopper 161 dissolves, so the stopper is removed, and the wedge-shaped separator 160 enters between the neodymium magnet 132A and the iron piece 124A due to the tension torque of the tension spring 164, separating the neodymium magnet 132A and the iron piece 124A, i.e., the base part 130 and the floater 120.

Next, another mechanism for automatically raising the antenna 140 will be explained with reference to Figure 21.

In this example, the antenna 140 is also connected to the tip of the spring wire 141, which is held at support point F3 on the top surface of the floater 120 and support point F4 on the bottom, and a spring portion 144 is formed wound between support points F3 and F4. Support points F3 and F4 are fixed in their holding positions, but are movable relative to the spring wire 141. Normally, the spring portion 144 is at position P1B, and the antenna 140 is tilted onto the top surface of the floater 120, with the top portion locked by a stopper 126 that can be opened and closed. When the stopper 126 is released by the impact of being dropped into the water or by human intervention, the spring wire 141 moves relative to support points F3 and F4 due to the restoring force of the spring portion 144, so that the antenna 140 automatically stands up on the top surface of the floater 120.

Figure 22 shows a specific example of a mechanism for automatically separating the floater 120 from the base portion 130. One end 174 of a tension spring 172 is fixed in a water-soluble stopper 171, and if the device is dropped into water, the stopper 171 dissolves. This causes the wedge 170 to be pulled toward the spring portion 173 of the tension spring 172, and the insertion action of the wedge 170 separates the magnet from the iron piece. This causes the floater 120 to automatically separate from the base portion 130. Figure 23 shows the actual appearance.

In the above, the water rescue signal transmitter 100 is described as being attached to the arm with two bands (101, 102), but it can also be attached to a life jacket, and instead of the bands, it is also possible to use an elastic ring, Velcro (registered trademark), hooks, etc. Also, in the above, a mechanical microswitch was given as an example of the switch means, but this is not limited to this, and an electrical proximity switch, etc. can also be used.

Furthermore, while the base and floater are described above as being disk-shaped, they may also be rectangular or polygonal. Also, the cover housing is not essential and may be omitted.

100 Water rescue signal transmitter 101, 102 Band 110 Cover housing 111 Neodymium magnet 120 Floater 121 Fixed part 122 Microswitch 123 Cavity 124 (124A to 124D) Iron piece 126 Stopper 130 Base part 131 Base body 132A, 132B Holding member 133 Wire 134 (134A to 134D) Neodymium magnet 135, 137 Plastic sheet 136 Engagement part 140 Antenna 141 Spring wire 143, 144 Spring part 150 Transmitting circuit 151 Battery 152 Antenna lead 160 Wedge-shaped separator 161 Water-soluble stopper 162 Permalloy magnet canceller sheet 163 Lead part plastic sheet 164 Tension spring

Claims (4)

A base part that can be attached to the body;
a floater having a transmitting circuit and a spring-elastic foldable antenna connected to the transmitting circuit , the floater being magnetically engaged with an upper surface of the base;
a cover housing that covers the base portion and is magnetically engaged with an upper surface of the floater;
a switch means for detecting engagement and disengagement of the floater with respect to the base portion;
It is composed of
The magnetic engagement between the base portion and the floater is formed by a first magnet and a first magnetic material, and a water-soluble first plastic sheet is interposed between the first magnet and the first magnetic material,
the magnetic engagement between the base portion and the cover housing is formed by a second magnet and a second magnetic material, and a water-soluble second plastic sheet is interposed between the second magnet and the second magnetic material;
When the cover housing and the floater are magnetically engaged with the base portion, the antenna is wound in a spiral shape around the side surface of the floater, and the transmitting circuit is not activated by the switch means,
When the cover housing is separated from the base portion, the antenna automatically stands up due to spring elasticity, and the transmitting circuit is activated by the switch means.
A water rescue signal transmitter characterized in that, when submerged, the cover housing and the floater are separated from the base portion, the transmitting circuit is activated, and the floater rises to the water surface to transmit a water rescue signal from the antenna . A base unit that is equipped with a transmission circuit and can be worn on the body;
a floater having a spring-elastic foldable antenna connected to the transmitting circuit by wiring and magnetically engaged with an upper surface of the base;
a cover housing that covers the base portion and is magnetically engaged with an upper surface of the floater;
a switch means for detecting engagement and disengagement of the floater with respect to the base portion;
It is composed of
The magnetic engagement between the base portion and the floater is formed by a first magnet and a first magnetic material, and a water-soluble first plastic sheet is interposed between the first magnet and the first magnetic material,
the magnetic engagement between the base portion and the cover housing is formed by a second magnet and a second magnetic material, and a water-soluble second plastic sheet is interposed between the second magnet and the second magnetic material;
When the cover housing and the floater are magnetically engaged with the base portion, the antenna is wound in a spiral shape around the side surface of the floater, and the transmitting circuit is not activated by the switch means,
When the cover housing is separated from the base portion, the antenna automatically stands up due to spring elasticity, and the transmitting circuit is activated by the switch means.
A water rescue signal transmitter characterized in that, when submerged, the cover housing and the floater are separated from the base portion, the transmitting circuit is activated, and the floater rises to the water surface to transmit a water rescue signal from the antenna. 3. A water rescue signal transmitter as claimed in claim 1 or 2 , wherein the base portion and the floater are connected by a sturdy wire or string. 3. The water rescue signal transmitter according to claim 1, wherein the switch means is waterproof and the water rescue signal includes a unique ID and location information.

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