JP2000217478A - Backlash preventive device for fishing reel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a backlash preventive device for fishing reel capable of inhibiting over rotative speed, increasing flying distance of a terminal tackle as compared with conventional one by installing a generator, high speed switch, detector for rotational speed and a specific signal processor. SOLUTION: A double bearing type reel for fishing having a generator comprising a coil 213 installed on the reel body 100 and a magnet fixed on the spool 200 and rotating the periphery of the coil 213 as an unit with the spool 200, this back lash inhibitor comprises the generator comprising a coil 213 and a magnet, a high speed switch connected to the generator, a detector for rotational speed of the spool 200 and a signal processor calculating the rate of change of the rotational speed of the spool 200 and commanding the close or open of the high speed switch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing a backlash phenomenon caused by excessive rotation of a spool when a fishing line is released in a double-bearing type fishing reel.

[0002]

2. Description of the Related Art As means for preventing excessive rotation of a spool when a fishing line is released from a dual-bearing fishing reel, an eddy current is generated by rotating a conductor integrally rotating with the spool in a magnetic field by a permanent magnet. There are a magnetic brake system in which the spool is generated to brake the spool, and a centrifugal brake system in which the spool is braked by utilizing the centrifugal force applied to a brake shoe which rotates integrally with the spool. Also, JP-A-10-262
As disclosed in Japanese Patent Publication No. 518, a combination of a magnetic braking system and a centrifugal braking system is known.

[0003]

In the magnetic brake system, there are no frictional parts, the durability is excellent, and no noise is generated. However, the eddy current is generated as long as the reel is rotating, and the eddy current generated is increased as the rotational speed of the spool is increased, so that the braking force acting on the spool is also increased. In the early stage of casting, a large braking force acts on the spool even when the device is in flight and there is no risk of backlash phenomenon, that is, when the spool is being pulled by the fishing line (device) and rotating at high speed. And because the braking force is always acting on the spool,
The flight distance of the device tied to the tip of the fishing line was greatly sacrificed.

In the centrifugal braking system, the brake pad is pressed against the inner wall of the spool by the centrifugal force generated by the rotation to generate a frictional force, and the frictional force generates a braking force. Therefore, although the structure is simple, the braking force acting on the spool is proportional to the square of the rotation speed of the spool, so that a large braking force is applied only at high speed rotation, and the brake is hardly applied at low speed rotation. For this reason, the flying distance of the tackle bound to the tip of the fishing line is greatly reduced as in the magnetic brake method, and the fishing line is entangled due to the backlash phenomenon in the event of a sudden stall due to gusts etc. at low speed rotation. Occurs. Further, since the brake pads are worn, the braking force is not constant, and it is necessary to replace worn parts.

On the other hand, in Japanese Patent Application Laid-Open No. 10-262518, when a spool is rotated at a high speed, a centrifugal force causes a cylindrical conductor rotating in conjunction with the spool to enter the groove of the magnet ring and vortex. It is designed to generate current. When the rotational speed of the spool is reduced and the centrifugal force is reduced, the cylindrical conductor comes out of the groove of the magnet ring due to the repulsive force of the spring, so that no eddy current is generated and the braking force does not act. The feature of this system is a magnetic brake system that applies a large braking force only when the spool rotates at a high speed, and the problem of the magnetic brake system has not been solved.

Generally, the backlash phenomenon caused by excessive rotation of the spool occurs about one second after the peak of the fishing line release speed,
It is easy to get up right after the device attached to the tip of the fishing line lands. On the other hand, in the centrifugal braking method, the magnitude of the braking force is proportional to the square of the spool rotation speed. Therefore, regardless of the rotation speed of the spool, the optimum braking force corresponding to the operating state of the spool must be applied. Could not. or,
In the magnetic braking system using a permanent magnet or the like, a large braking force is obtained as the rotation speed of the spool increases, and the magnitude of the braking force is controlled by changing the distance between the magnet and the conductor. In this method, the flying distance of the device was always reduced because the braking force was applied. Further, it is necessary to move the magnet or the conductor, which complicates the structure and does not allow stable control.

In the above-described braking system, when the mechanism is suddenly stalled due to a head wind or a cross wind, it is not possible to cope with a change in the release speed of the fishing line, and the fishing line is entangled due to a backlash phenomenon due to excessive rotation of the spool. Was. As a countermeasure, in practice, the braking device is adjusted so that a large braking force is always applied to the spool. For this reason, the flight distance of the device had to be greatly reduced.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a coil provided on a reel body and a magnet which is fixed to a spool and rotates around the outer periphery of the coil integrally with the spool are provided. A dual-bearing fishing reel, comprising a generator comprising a coil and a magnet, a high-speed switch connected to the generator, a rotational speed detector for the spool, and the spool rotational speed. And a signal processor for instructing the short-circuit or opening of the high-speed switch by calculating the change rate of the high-speed switch, thereby preventing the spool from rotating excessively.

[0009]

According to the present invention, when the spool is rotating under tension from the fishing line, the rate of decrease in the rotation speed of the spool is reduced when the spool rotates alone (when there is no tension from the fishing line). It is made by paying attention to the fact that the number is smaller. That is, the technical idea of the present invention is that an ideal fishing line tension acting on the spool is set in advance, and this ideal tension is always applied to the spool. By controlling the load on the generator connected to the spool by opening / short-circuiting, the tension from the fishing line was controlled. "

Furthermore, in the spool braking force control of the fishing reel according to the present invention, for the first time, the load control of the generator is performed by a high-speed switch, and the control is completely different from the conventional spool braking force control method. In this method, the braking force of the spool is controlled stably and freely by electronic control, and the change rate of the rotation speed of the spool is measured and calculated to calculate the tension of the fishing line. The load of the generator connected to the spool is controlled by opening / short-circuiting a high-speed switch so that the tension becomes a preset target value.

The ideal control of the braking force of the spool is to make the rotational speed of the spool coincide with the discharge speed of the fishing line. However, since the release speed of the fishing line cannot be measured by a simple method, the change rate of the rotation speed of the reel is always measured instead of the release speed of the fishing line, and the tension of the fishing line is calculated from the change rate. The generator connected to the spool is short-circuited / opened to adjust the load of the generator so as to reach the set target value, and the braking force applied to the spool is controlled.

The rate of change (attenuation characteristic) of the rotation speed of the spool
The relationship between and the tension applied to the spool from the fishing line will be described with reference to FIG. At a certain time point (Δt _n ), if a change in the rotation speed of the spool occurs, the difference (Δω _{n from} the rotation speed of the case where the spool is free to rotate independently without receiving the tension from the fishing line at this time) Is due to the rotational driving force (torque) generated by the tension from the fishing line. If the rate of change of the rotation speed at this time is (Δω _n / Δt _n ),
The driving torque T for rotating the spool at this time can be calculated by the following equation of motion. T _n = J * (Δω _n / Δt _n ) (1) where J is a moment of inertia of the spool, and Δt _n is a rotation speed sampling interval (a slit at a certain point of a rotation speed detector described later). (Elapsed time for one pitch).

If the drive torque of the spool can be calculated from equation (1), the radius of the point of action of the fishing line (usually 15 to 20 m)
m) to determine the tension. This tension is set in an ideal range (for example, 0.02 to 0.05 N as a target value).
The open / short command is given to the high-speed switch so that That is, when the calculated tension from the fishing line is higher than the target value, the signal processor issues an open command to the high-speed switch to release the braking force on the spool. Conversely, when the tension from the fishing line is lower than the target value, a short-circuit command is given to the high-speed switch by the signal processing device to apply a braking force to the spool, thereby preventing the spool from rotating excessively.

The radius (rotation radius) where the moment of inertia of the spool and the tension act, that is, the rotational driving force (torque) due to the tension from the fishing line changes depending on the winding state of the fishing line. As the release of the fishing line progresses, the winding of the fishing line decreases, the moment of inertia of the spool decreases, and the turning radius on which the tension acts decreases, and the driving torque also decreases.
In addition, it has been confirmed by experiments that these effects in the present control method are small error ranges in combination with the above, and do not affect control accuracy. Although the operation state of the brake is shown in the lower part of FIG. 6, the brake is ON (operation state) at Δt _n , but it is not necessary to be ON (ON / OFF is not determined only in this graph). Absent).
Here, it is shown that the rate of decrease in the rotational speed of the spool varies depending on the operation state of the brake.

In the spool braking force control method according to the present invention, the braking force applied to the spool is controlled to a necessary minimum irrespective of the rotational speed of the spool. At the beginning of casting, when the rotation speed of the reel reaches the maximum rotation speed, at the moment when the tackle (weight) lands and the release of the fishing line stops, or at the time of unexpected fishing line release due to gusts etc., the braking force can be controlled accurately, so the backlash The phenomenon and the slack of the fishing line can be prevented, and a minimum braking force is applied, so that the flying distance is not sacrificed at the time of casting. In addition, the braking force is always controlled by the same method, and is constituted by a high-speed switch and a signal processing device, so that the device itself can be made simple and compact.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. 1 to 4 relate to the structure of a fishing reel according to the present invention. 1 is a sectional view of a fishing reel according to the present invention, FIG. 2 is a sectional view at a position AA in FIG. 1, FIG. 3 is a sectional view at a position BB in FIG. 1, and FIG. It is an enlarged view in C section.

FIG. 5 is a block diagram showing the construction of a spool braking force control system according to the present invention, and FIG. 6 is a graph for explaining the relationship between a change in the rotational speed of the spool and the fishing line tension.

An embodiment of a fishing reel according to the present invention will be described below. At least one pair of arc / annular permanent magnets 211 is configured to rotate integrally with the spool 200, and the spool 200 is supported by the reel body 100 by bearings 216 so that it can rotate freely with respect to the reel body. Is configured. The laminated core 212 is connected to the reel body 10 via a spool shaft 214.
Although it is fixed to 0, the spool 200 is supported by the bearings 215, so that it is always stationary at the center inside the spool without hindering the rotation of the spool. As described above, a generator is configured by rotating the permanent magnet 211 while generating a magnetic field on the outer peripheral portion of the conductor including the coil 213 and the laminated core 212.

Next, the construction of the spool braking force control system according to the present invention shown in FIG. 5 will be described. A slit 225 having grooves formed at equal intervals on an annular outer peripheral portion is fixed to the spool so as to rotate integrally with the spool 200. A photo interrupter 226 is installed at a position opposite to the slit 225 and fixed to the reel unit 100. The rotation speed of the spool is detected by the photo interrupter 226. That is, a time (corresponding to Δt _n described above) from the passage of the groove having the slit through the photointerrupter to the passage of the next groove through the photointerrupter is measured, and the rotation speed of the spool at this moment is determined by a digital signal. Processor (DS
P) Obtained by calculation in 219. Similarly, the rotational speed of the spool when the next groove passes is calculated and obtained. In this way, by sequentially calculating the rotational speed of the spool when passing between the grooves, the rate of change in the rotational speed of the spool can also be calculated and obtained. In this manner, the tension at each instant of the fishing line can be calculated from the above equation (1).

An arc / annular permanent magnet 211 fixed to the spool 200 is connected to a generator configured to rotate around the laminated iron core 212 and the coil winding 213 fixed to the reel body 100 and a high-speed generator. A switch, for example, a transistor (FET) 220 is electrically connected.
That is, the coil winding 213 constituting the generator and the high-speed switch, for example, the transistor 220 are electrically connected. The transistor 220 is also electrically connected to the digital signal processor 219 to form the circuit shown in FIG.

Next, when the signal from the photo interrupter 226 is input to the digital signal processor 219, the rotation speed of the spool is calculated and obtained.
The change rate of the rotation speed of the spool (Δω _n / Δt _n ) is calculated, and the fishing line tension T _n is calculated from the equation (1). The fishline tension T _n gives a command to open / short circuit to the transistor 220 such that the preset range. If the rotation speed of the spool is faster than the release speed of the fishing line, the fishing line tension is necessarily zero. Accordingly, a short-circuit command is given from the digital signal processor 219 to the transistor 220 to bring the circuit into a connected state. This allows
A current flows through the circuit due to the electromotive force generated by the generator, and is consumed as heat energy by a resistor such as the transistor 220.

In this way, the load is applied to the generator, and the rotational speed of the spool decreases. When the rotation speed of the spool is lower than the release speed of the fishing line, the spool receives tension from the fishing line. When the tension from the fishing line enters a preset range, the digital signal processor 219
To release the braking force on the spool by giving an opening command to the transistor 220. Thereafter, the spool is driven by the fishing line, and the generator circuit is maintained in the disconnected state, so that no current flows, and the load is not applied to the generator, so that the spool can maintain high-speed rotation. .

In a state where the tension from the fishing line is not applied (while the spool is rotating alone), there is no driving torque from the fishing line, and the reduction rate of the rotation speed of the spool increases due to various resistances. Conversely, when the tension from the fishing line acts on the spool, this tension becomes the driving torque for rotating the spool, and the rate of decrease in the rotation speed of the spool is small. That is, in this state, tension is applied to the spool from the fishing line, and the backlash phenomenon does not occur.

In summary, in the present invention, the rotation speed of the spool is detected by the photo interrupter 226,
The digital signal processor 219 calculates the change rate of the rotation speed of the spool and the fishing line tension. If the fishing line tension is smaller than the preset range, a short-circuit command is given from the digital signal processor 219 to the transistor 220 to supply a current to the generator circuit, thereby applying a braking force to the spool. This state is maintained until the fishing line tension falls within a preset range. When the fishing line tension enters the set value, the digital signal processor 219 sends a signal to the transistor 220.
To release the braking force to the spool by interrupting the generator circuit.

In the present invention configured as described above,
The actual operating state of the spool braking force will be described below.
While the fishing line is being released in the early stage of the casting, since the spool 200 is under tension from the fishing line, an opening command is transmitted from the digital signal processor 219 to the transistor 220. Immediately after the tackle (weight) has landed, the tension from the fishing line is lost, and the spool is idled. At this time, the fishing line tension calculated based on the signal from the photo interrupter 226 becomes zero, and a short circuit command is transmitted from the digital signal processor 219 to the transistor 220. Due to this short-circuit command, the generator enters the power generation state and the rotation speed of the spool is high.
The generated electromotive force is also increasing. Therefore, the spool 20
The drive torque for rotating 0 also needs a large value. This state is a state in which a large braking force is applied to the spool, thereby preventing the occurrence of the backlash phenomenon. The current generated by the generator is consumed by the copper loss of the transistor and the coil, and is dissipated as heat. That is, the transistor and the coil constitute a load (resistance) of the generator circuit.

The present invention is not limited to the above embodiment. That is, in the present embodiment, the configuration is such that the coil is fixed and the magnet is rotated, but the reverse configuration is also possible. That is, it is also possible to adopt a configuration in which a magnet is fixed and current is extracted from a rotating coil using a slip ring or the like. In addition, the permanent magnet is abolished, and a power source such as a battery is connected to the coil to flow current. It is also possible to control the braking force on the spool by opening and shorting this current with a transistor. Also, a piezoelectric element is used instead of a magnet or a coil, and the piezoelectric element is turned on / off by a transistor so that the displacement surface of the piezoelectric element is brought into contact with the spool, or the non-contact state is used to control the braking force ( (A brake pad of a centrifugal brake is operated by a piezoelectric element).

FIG. 7 shows the actual measurement result of the spool rotation speed according to the present invention. In the apparatus in which the braking force of the spool is controlled as in the present invention, the decrease in the rotation speed of the spool is smaller than in the conventional case in which only the magnetic force control (magnetic braking method) is performed (when no braking force control is performed). But the time to land is longer. That is, the flight distance of the device is large. Also, no backlash phenomenon occurred at the time of landing on water or the like occurred at all. A great effect according to the present invention was confirmed.

The present invention has the following excellent effects as described above. (1) Since only the minimum braking force required to prevent the backlash phenomenon is applied to the spool, the flight distance of the device is not sacrificed, and the flight distance of the device is significantly improved as compared with the prior art. Was completed. (2) Since the minimum necessary braking force is always applied to the spool, the backlash phenomenon can be completely prevented even if the mechanism is suddenly stalled due to headwind, crosswind or the like. (3) The mechanical brake is not required, the resistance at the time of winding a lure or the like is reduced, and the hit is easily recognized. (4) Since the device is in the full brake state after the landing of the device, it is not necessary to perform the summing (the operation of stopping the rotation of the spool with the finger simultaneously with the landing of the device).

[Brief description of the drawings]

FIG. 1 is a sectional view of a reel according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is an enlarged view of a portion C in FIG. 1;

FIG. 5 is a block diagram of a control system of the present invention.

FIG. 6 is an explanatory diagram of a damping characteristic of a rotation speed of a spool.

FIG. 7 is a graph showing a measurement of a change in a spool rotation speed depending on the presence or absence of tension control according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 fishing reel body 200 spool 211 magnet 212 laminated iron core 213 coil winding 214 spool shaft 215 bearing 216 bearing 217 control circuit case 218 board 219 digital signal processor (DSP) 220 transistor (FET) 221 button battery 222 male electrode 223 female Electrode 224 Electrode fixing substrate 225 Slit 226 Photointerrupter 230 Cover

Claims (1)

[Claims] A dual-bearing fishing reel comprising a generator provided with a coil provided on a reel body and a magnet fixed to the spool and rotating on the outer periphery of the coil integrally with the spool. , A high-speed switch connected to the generator, a rotational speed detector for the spool, and a signal processing device for calculating a change rate of the spool rotational speed and instructing a short-circuit or an open of the high-speed switch. An anti-backlash device for fishing reels, which prevents over-rotation of a spool composed of: