JP2536099Y2 - Backlash prevention device for fishing reels - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a conductive ring in a backlash prevention device using an eddy current generated by a magnet.

[0002]

2. Description of the Related Art As means for preventing a fishing line backlash phenomenon due to vortex rotation of a spool when a fishing line is released from a dual-bearing fishing reel, an eddy current is generated by a magnet on a conductive ring provided on the spool to mount the spool. Braking can be performed in accordance with Japanese Utility Model Publication No. Sho 62-35330 and Japanese Utility Model Publication No. Sho 62-35.
No. 332, for example.

[0003]

The braking force Fkg generated on the conductive ring for braking the spool is as follows, and is proportional to the thickness (plate thickness) of the conductive ring.

[0004]

(Equation 1)

Note that α is a proportional constant, and Bg is the air gap magnetic flux density (G
auss), Ag is the void area (cm ² ), V is the velocity of the conductive ring (cm /
sec), S is the plate thickness (cm) of the conductive ring, and ρ is the electric resistance (Ω-cm) of the conductive ring.

From this, it is the theory that a thicker conductive ring has a larger braking force. However, if the conductive ring is formed thicker, the spool becomes heavier and the moment of inertia of the spool becomes larger, resulting in a braking action. In addition, there is a problem that the reel itself also becomes heavy and adversely affects the casting operation. SUMMARY OF THE INVENTION It is an object of the present invention to provide a fishing reel backlash preventing apparatus which can improve the braking force by improving these problems and reduce the weight of the reel.

[0007]

According to the present invention, in order to achieve the above object, a conductive ring is projected from one side of a spool rotatably supported on a reel body, and a magnetic field generated by a magnet is provided on the conductive ring. In a fishing reel provided with a forming mechanism, the spool mounting side portion of the conductive ring other than the magnet-facing portion of the conductive ring is formed to be thin, or formed with a hole, or integrally formed with a lightweight member. Or the conductive ring body is reduced in weight by connecting the magnets, and the magnet facing portion means a position when the magnet is arranged so as to generate the maximum braking force. Further, in the case of the present invention, if a lightening hole is formed in the body of the spool itself, the braking efficiency can be further improved.

[0008]

According to the present invention, only the conductive ring at the magnet-facing portion of the magnetic field forming mechanism is formed to be thick enough to exert a sufficient braking force, and the portion of the conductive ring attached to the spool is as light as possible. By doing so, the moment of inertia of the spool is reduced by reducing the weight of the conductive ring, and at the same time the spool itself is also reduced in weight.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
As is well known, the spool 2 rotatably supported on the reel body 1 of the dual-bearing type reel is separated from the drive mechanism of the handle shaft at the time of casting so that the fishing line can be paid out. A conductive ring 3 made of copper, aluminum, or the like protrudes from the side, and a magnetic field forming mechanism 5 by magnets 4 arranged on the inside and outside of the conductive ring 3 so that different poles face each other. Are provided on the reel body 1 so as to be superposed. Thus, the opposing portion 3 ′ of the magnet 4 on the outer end side of the conductive ring 3 is thick,
The spool mounting side portion 3 ″ is formed to be thinner,
The outer magnet 4 is formed so that the braking mechanism can be adjusted by changing the position of the outer magnet 4 facing the inner magnet 4 by the rotating mechanism 6.

Since the embodiment of the present invention is configured as described above, the moment of inertia of the spool 2 at the time of casting is small, and the weight of the conductive ring 3 also makes the spool 2 lightweight, so that the braking action is efficiently performed. The casting operation can be easily performed by reducing the weight of the reel itself.

The second embodiment shown in FIGS. 3 and 4 and the third embodiment shown in FIGS. 5 and 6 serve as a circular hole and a long hole, respectively, as means for reducing the weight of the conductive ring 3 on the spool mounting side. Are provided with lightening holes 7. In the fourth embodiment shown in FIG. 7, a synthetic resin or other lightweight member 8 lighter than the conductive ring 3 is integrally connected as the spool mounting side portion 3 ″ of the conductive ring 3. Further, FIG. In the fifth embodiment shown in FIG. 9, a lightening hole 9 is also provided in the body of the spool 2 in the embodiment of FIG. 1 to further reduce the weight of the spool.

In the present invention, when the braking force adjusting means is provided in the magnetic field forming mechanism 5, the inner and outer opposed magnets 4 as shown by a chain line and an arrow in FIG. Can be adjusted by moving in the axial direction of the spool, or the inner or outer magnet 4 can be adjusted by moving in the radial direction.

[0013]

According to the present invention, in a backlash prevention device utilizing eddy current generated by a magnet, a portion of a conductive ring opposed to a magnet is formed with a sufficient thickness so as to increase a braking force, while a portion on a spool mounting side is thin. In addition, the weight of the spool is reduced by reducing the weight of the spool by reducing the weight of the spool by reducing the weight of the spool, and improving the braking efficiency of the spool. It has excellent features and practicality so that the casting operation can be performed smoothly and easily by reducing the weight of the device.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of the present invention.

FIG. 2 is a vertical sectional side view of the main part.

FIG. 3 is a partially cutaway front view of a main part of a second embodiment of the present invention.

FIG. 4 is a front view of the same.

FIG. 5 is a partially cutaway front view of a main part of a third embodiment of the present invention.

FIG. 6 is a front view of the same.

FIG. 7 is a partially cutaway front view of a main part of a fourth embodiment of the present invention.

FIG. 8 is a longitudinal sectional front view of a main part of a fifth embodiment of the present invention.

FIG. 9 is a plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reel body 2 Spool 3 Conductive ring 3 'Magnet facing part 3 "Spool mounting side part 4 Magnet 5 Magnetic field forming mechanism 7 Lightening hole 8 Lightweight member

Claims (3)

(57) [Scope of request for utility model registration] 1. A fishing reel in which a conductive ring is projected from one side of a spool rotatably supported by a reel body and a magnetic field forming mechanism is provided on the conductive ring by a magnet. A backlash preventing device for a fishing reel, characterized in that the spool mounting side portion of the conductive ring except for the magnet facing portion is made thinner to reduce the weight. 2. A fishing reel in which a conductive ring is projected from one side of a spool rotatably supported on a reel body and a magnetic field forming mechanism is provided on the conductive ring by a magnet. A backlash prevention device for a fishing reel, characterized in that a lightening hole is formed in a portion of the conductive ring body on the spool mounting side except for the magnet facing portion to reduce the weight. 3. A fishing reel in which a conductive ring is projected from one side of a spool rotatably supported by a reel body and a magnetic field forming mechanism is provided on the conductive ring by a magnet. A backlash prevention device for a fishing reel, characterized in that the spool mounting side portion of the conductive ring other than the magnet facing portion is lightened by integrally connecting the spool with a lighter member than the conductive ring.