JPS5814871Y2 - electric float - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an electric float that is ideal 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 fish, you can turn off the light source when the float sinks into the water to prevent other fish gathered by the bait from escaping. There are electric floats on the market that are designed to turn off the light underwater.1 Also, in general night fishing, the light source turns off or flashes when the float sinks into the water, so that anglers can clearly see the area around the fish. or
Alternatively, various methods have been proposed that 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 the light source was controlled by a semiconductor circuit and a current was passed through it.

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 switch operation must be brought out from inside the float body, or metal electrodes must be exposed on the float body made of synthetic resin, resulting in waterproofing. It had some drawbacks.

The present invention eliminates the above-mentioned conventional drawbacks by adopting an optical detection means that utilizes the principle of refraction and reflection of light by a prism. Let me explain based on this.

In Fig. 1, 1 is a float body, and this float body 1 is constructed by removably screwing together an upper case 2 and a lower case 3, and an O-ring 4 is disposed in this screwed part. It has a waterproof structure.

Reference numeral 5 denotes a visible light source consisting of a light emitting diode, and this visible light source 5 is located inside the tip of the top 6 of the upper case 2.

Reference numeral 7 denotes a prism disposed in the submerged part of the float body 1, that is, in the lower case 3. This prism 7 is made of transparent acrylic resin, etc. Or hole 8a for seawater intrusion
, 8b are provided.

Further, above the prism 7, there is a light emitting element 9 made of an infrared emitting diode, and a light receiving element 10 made of a phototransistor.
are arranged side by side.

Reference numeral 11 denotes a semiconductor control circuit, to which lead wires of the visible light source 5, light emitting element 9, and light emitting element 10 are connected, and a holding section 13 for holding a 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. 2 shows an electric circuit, and the semiconductor control circuit 11 includes two resistors R1 and R2 and two transistors.
l'r 1. It has Tr 2 .

The connection relationship is that the resistor R1 and the light emitting element 9 are connected in series, the resistor R2 and the light receiving element 10 are connected in series, and the connection point is connected to the base of the first stage NPN) transistor Tr1. The collector of the first-stage NPN transistor Tr1 is connected to the resistors R1 and R2, one end of the visible light source 5, and the anode of the power supply battery 12.

Further, the emitter of the first-stage NPN) transistor Tr1 is connected to the base of the next-stage NPN) transistor Tr2, and the collector of the next-stage NPN) transistor Tr2 is connected to the other end of the visible light source 5, and the emitter is connected to the light emitting element. 9 and the other end of the light receiving element 10 and the cathode of the power supply battery 11.

The operation of the above configuration will be explained.

First, to explain the operating state when the float is on land in the atmosphere, current flows through the light emitting element 9 through the resistor R1 to the power source battery 1.
2, the light emitting element 9 constantly emits light.

This light then travels straight through the prism T located directly below the light emitting element 9 as shown by the solid arrow in FIG. 1, and hits one reflective surface 7a of the prism 7.

Here, if the prism T is a right-angle prism, one of the reflecting surfaces 7a forms an angle of 45 degrees with respect to the incident light.

Since the outer surface side of this one reflecting surface ra is in the atmosphere,
Due to the principle of refraction and reflection of light, light undergoes total internal reflection; it is reflected at an angle of 90 degrees from one reflective surface 7a and hits the other reflective surface 1b, and then from this other reflective surface 7b, it is reflected by one reflective surface. Similar to 7a, the light is reflected at an angle of 90 degrees, passes through the prism 7 as it is, and is received by the light receiving element 10.

The light-receiving element 10 is constituted by a phototransistor, etc., and turns on when it receives light, so that the first-stage NPN transistor 'l''r1 turns off.

As a result, the next stage NPN) transistor Tr1 is also turned off.

Therefore, the visible light source 5 consisting of a light emitting diode is turned off.

Next, the operating state when the float is dropped onto the water surface and floated will be explained.

The light emitted from the light emitting element 9 passes through the prism 1 as shown in FIG.
It goes straight inside and reaches one of the reflective surfaces 7a.

In this case, since the outer surface of one reflective surface 7a is in contact with the water or seawater that has entered through the holes 8a and 8b of the lower case 3, there is no difference in the refractive index between the prism 7 and the water, and the light is transmitted to the first
As shown by the dotted arrow in the figure, one of the reflecting surfaces 7a remains as it is.
It passes through and escapes into the water.

As a result, no light enters the light receiving element 10 made of a phototransistor, so the light receiving element 10 is turned off.

As a result, the first-stage NPN transistor Tr1 is turned on, and the next-stage NPN transistor Tr2 is also turned on.

Therefore, the visible light source 5 consisting of a light emitting diode is turned on.

In this way, when the float is on land in the atmosphere and bait is attached to a fishing tackle or hook, the visible light source 5 is off, and when the float is dropped onto the water surface and floats, the visible light source 5 turns on. Therefore, it is possible to eliminate wasteful consumption of the power source battery 12, that is, to save the power source battery 12.

Furthermore, the method of lighting up the visible light source 5 underwater will be optimal if applied to an underwater light-emitting weight or a light-emitting squid needle that serves to attract fish.

As described above, according to the present invention, one light source is turned on and one is turned off by an optical detection means that utilizes the principle of refraction and reflection of light by a prism. It is no longer necessary to expose metal electrodes from the inside of the float body to the outside, or to expose metal electrodes on the pole or synthetic resin float body.As a result, the float can be formed into a shape that is almost the same as a conventional float, and is guaranteed to be waterproof. It is what it is.

In addition, the semiconductor control circuit is configured to turn off the light source in the atmosphere using the light-receiving element as a detection part, and turn on the light source when the float is dropped onto the water surface, thereby eliminating wasteful consumption of power batteries. It also has the practical effect of being able to.

[Brief Description of the Drawings] Figure 1 is a longitudinal sectional view of an electric float showing an embodiment of the present invention;
Figure 2 is an electrical circuit diagram of the float. 1...Float body, 5...Light source, 7...
...Prism, 9...Light emitting element, 1o...
. . . Light receiving element, 11 . . . Semiconductor control circuit,
12.--Power battery.

Claims (1)

[Scope of utility model registration request] A power battery, a light emitting element, a total reflection prism in which a reflective surface for reflecting light emitted from the light emitting element is arranged in the submerged part of the float body, and a light receiving element that receives the light reflected by the prism. An electric float comprising a semiconductor control circuit that uses the light receiving element as a detection part to turn off a light source in the atmosphere, and turns on the light source when the float is dropped onto the water surface.