JPS5835051B2 - electric float - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electric float suitable for night fishing.

Black sea bream is a typical target fish for night fishing.
These fish are very wary of light, so when fishing for these types of fish, you can turn off the light source when the float sinks into the water to catch the fish that are attracting the bait. Electric floats that turn off the light underwater to prevent them from escaping are now on sale, and for general night fishing, the light source is turned off when the float sinks into the water so that anglers can clearly see where the fish are. Various types of devices have been proposed that cause the display to change color, blink, or change color.

In this way, the light source can be turned off, blinked, or changed color.
Conventionally, there has been a mechanical method in which a light source switch inside the float is operated by the pulling force caused by a fish, or when the float sinks into the water due to a fish, water or seawater is used as a conductor to connect electrodes exposed on the surface of the float. An electrical method was used in which a current was passed and the light source was controlled by a semiconductor circuit.

However, these methods had the following drawbacks.

First, the former mechanical method requires delicate adjustment of the sensitivity of the switch due to the relationship between the operating pressure of the switch and the buoyancy of the float.
Operation is uncertain.

In addition, the latter electrical method has electrodes that come into contact with seawater, etc.
Rust formation becomes a problem.

Furthermore, in both of the above methods, parts for operating the switch must be brought out from inside the float body, or metal electrodes must be exposed on the float body, which is made of resin. It had problems with waterproofing.

The present invention has been made to solve the above-mentioned conventional drawbacks, and will be explained below based on drawings showing embodiments thereof.

1 to 3, 1 is a float main body, and this float main body 1 is constructed by removably screwing together an upper case 2 and a lower case 3, and an O-ring is attached to this screwed part. 4 to create a waterproof structure.

The tip of the top 5 of the upper case 2 is hermetically sealed with a total reflection prism 6 made of transparent acrylic resin or the like, and below the prism 6 is a light emitting element 7 made of an infrared emitting diode. A light receiving element 8 made of a phototransistor is arranged side by side.

Reference numeral 9 denotes a shielding plate for preventing light from the light emitting element 7 from directly entering the light receiving element 8.

Reference numeral 10 denotes a visible light source consisting of a light emitting diode, and this visible light source 1o is located below the light emitting element 7 and light receiving element 8.

The top part 5 of the upper case 2 serves as a water outlet, and the prism 6, light emitting element 7, light receiving element 8, and visible light source 10 are always in the atmosphere.

Reference numeral 11 denotes a semiconductor control circuit, to which lead wires of the light emitting element 7, light receiving element 8, and visible light source 10 are connected, and a holding part 13 for holding the power battery 12 is provided below the semiconductor control circuit 11. A power supply battery 12 is provided to form an electric circuit with the power supply battery 12.

FIG. 4 shows an electric circuit, which includes the semiconductor control circuit 11, two resistors R, R2, and two transistors T.
rl + T r2 is present.

The connection relationship is that the resistor R1 and the light emitting element 7 are connected in series, the resistor R2 and the light receiving element 8 are connected in series, and the connection point is connected to the base of the first stage PNP transistor Tr1. The emitter of the PNP) transistor Tr1 is connected to the resistor R1+R2, one end of the visible light beam 10, and the anode of the power supply battery 12. The collector of the PNP) transistor Tr1 is connected to the next stage NPN) transistor Tr.
Connected to the base of 2 and the next stage NPN) Runster T
Is r2 a collector? It is connected to the curved end of the J vision light source 10, and its emitter is connected to the curved end of the light emitting element 7 and light receiving element 8, and to the cathode of the power supply battery 12.

The operation of the above configuration will be explained.

First, to explain the operating state when the float is floating on the water surface, current flows to the light emitting element 7 through the resistor R1 and the power source battery 12.
As a result, the light emitting element 7 is constantly emitting light.

This light enters the base 6c of the prism 6 directly above the light emitting element 7 at right angles, travels straight through the prism 6 as shown in FIG. 2, and hits one reflective surface 6a of the prism 6.

Here, if the prism 6 is a right-angled prism, one of the reflecting surfaces 6a will be at an angle of 45 degrees to benefit the incident light.

Since the outer surface side of this one reflecting surface 6a is in the atmosphere,
Based on the principle of refraction and reflection of light, light is totally reflected, and is reflected at an angle of 90 degrees from one reflecting surface 6a, and then reflected at an angle of 90 degrees from the other reflecting surface 6b, similar to the one reflecting surface 6a. The light is reflected, strikes the base 6c at right angles, passes through the base 6c, exits the prism 6, and is received by the light receiving element 8.

The light receiving element 8 is composed of a phototransistor,
When light is received, it turns on, so a voltage is generated in the resistor R2, and the first stage PNP transistor Tr1 turns on.

Due to this turning on, current also flows to the base of the next stage NPN transistor Tr2, and the next stage NPN transistor Tr2
turns on.

When turned on, the visible light source 10 made of a light emitting diode lights up.

Next, the operating state when the float sinks into the water due to contact with a fish, as shown in FIG. 3, will be explained.

As shown in FIG. 3, the light emitted from the light emitting element 7 travels straight through the prism 6 and reaches one reflecting surface 6a.

In this case, since the outer surface of one reflective surface 6a has been changed to water or seawater, there is no difference in the refractive index between the prism 6 and water, and the light passes through the other reflective surface 6a and escapes into the water. One piece.

As a result, no light enters the light-receiving element 8 made of a phototransistor, so the light-receiving element 8 is turned off.

As a result, the first stage PNP) transistor Tr1b and the next stage NPN) transistor Tr2 are turned off, so that the visible light source 10 consisting of a light emitting diode is turned off.

In this manner, when the float is floating on the water surface, the visible light source 10 is turned on, and when the float sinks into the water due to a fish, the visible light source 10 is turned off.

In the above embodiment, the visible light source 10 is turned off when the float sinks into the water due to a fish.
As shown in FIG. 5, the prism 6 is located in the middle of the upper case 2, and is designed so that the prism 6 becomes a water outlet, and a visible light source 10 is installed at the tip of the top 5 of the upper case 3. If the float sinks slightly near the fish, the prism 6 will be below the water surface and will perform the same operation as in the above embodiment.

By modifying the electric circuit of the semiconductor control circuit 11, it is also possible to make the visible light source 10 flicker or change the color by switching different color light sources.

Furthermore, in the case where the prism 6 is located at the tip of the top 5 of the upper case 2 as shown in FIG. 1, the prism 6 will not sink unless the entire float is submerged in the water. It is difficult for anglers to recognize it because it flashes or changes color underwater.

Therefore, as shown in FIG. 5, if the prism 6 is positioned below the visible light rays 10, the visible light source 10 will not sink into the water, making it easier to recognize it.

Furthermore, if the prism 6 is located in the lower case 3 which is always submerged as shown in FIG. The lights will be off.

Therefore, as an electric circuit, the first stage transistor Trl as shown in FIG.
By changing from the ) transistor to the NPN) transistor, the next stage NPN) transistor Tr2 is inverted and turned on, so that the visible light source 10 lights up.

That is, the operation is opposite to that of the above-described embodiment.

In this case, when bait is attached to a fishing tackle or hook facing land in the atmosphere, the visible light source 10 is turned off, and when the float is dropped onto the water surface and floated, the visible light source 10 is turned on. This eliminates unnecessary consumption of the power battery 12.
It is possible to save on the power supply battery 12.

The hole 14 at the bottom of the lower case 3 shown in FIG. 6 is a hole for allowing water or seawater to enter the surface of the prism 6.

The method of lighting up the visible light source 10 underwater in this manner is most suitable when applied to underwater light-emitting rods and light-emitting squid hooks that serve to attract fish.

As explained in the above embodiment, the principle of refraction and reflection of light by a prism is applied to detect the presence or absence of light and turn off, blink, or change the color of the light source, and the prism 6 is not a right-angled prism. , it may be any angle that causes total reflection from the relationship with the refractive index of water or seawater.

Of the two slopes 6a and 6b of the prism 6, at least the slope 6a on the incident light side is exposed to the surface of the float to operate.

The light-emitting element 7 can be a miniature bulb or a light-emitting diode, but since the light-emitting element 7 is used for detection, it is better not to emit visible light, and since the light of an infrared light-emitting diode is invisible to the naked eye, It is convenient for anglers.

Further, as the light receiving element 8, CDS, a solar cell, etc. can be considered.

Furthermore, if the prism 6 is configured to have a conical shape, it can be easily and airtightly fixed to a cylindrical shape such as a float.
You can definitely do it.

As described above, according to the present invention, a method is adopted in which the light source is changed when the float prism sinks into the water by optical detection using the principle of refraction and reflection of light by a prism, which is different from the conventional method. Unlike mechanical or electrical methods, there is no need to take parts for switch operation from inside the float body to the outside, or to expose metal electrodes on the synthetic resin float body. As a result, it can be formed into a shape that is almost the same as that of conventional floats, and it is also completely waterproof.

Furthermore, by devising the semiconductor control circuit, it is possible to turn off the light source, turn it on and off, and change color at will.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an electric float showing an embodiment of the present invention;
Figures 2 and 3 are cross-sectional views of the main parts showing the operating state of the prism suspended in the atmosphere or water, Figure 4 is the electrical circuit diagram of the float, and Figures 5 and 6 are the float's electrical circuit diagram. FIG. 7 is a longitudinal cross-sectional view showing the embodiment of the song, and FIG. 7 is an electrical circuit diagram of the embodiment of the pond shown in FIG. 1... Float body, 6... Prism, 7
...... Light emitting element, 8... Light receiving element, 10
...Light source, 11...Semiconductor control circuit.

Claims (1)

[Scope of Claims] 1. A light-emitting element, a total reflection type prism that reflects light emitted from the light-emitting element, and a light-receiving element that receives the light reflected by the prism, and has two reflective elements of the prism. Among the surfaces, at least the reflective surface on the incident light side is exposed on the surface of the float main body, and the light receiving element is used as a detection section to change the light source by a semiconductor control circuit when the prism of the float sinks into the water. Features an electric float. 2. The electric float according to claim 1, wherein the light emitting element is an infrared light emitting diode. 3. The electric float according to claim 1, wherein the prism has a conical shape.