Spool braking device and fishing reel

Patent metadata

Field	Value
Publication number	US-9955678-B2
Application number	US-201514813685-A
Country	US
Kind code	B2
Filing date	Jul 30, 2015
Priority date	Aug 8, 2014
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A spool braking device brakes the rotation of a spool rotatably supported by a reel body. The spool, which is a conductor that is rotated in conjunction with the spool. The magnet includes an N-pole and an S-pole on a surface that faces the rotating surface of the spool. The retaining member, the support ring, and the engagement member form a magnetic flux change rate variable mechanism. The magnetic flux change rate variable mechanism varies the change rate of the flux in the rotational circumferential direction that is affected by the magnet, at a prescribed rotating surface of the spool having a prescribed unit width in the rotational axis direction, with the rotation of the spool.

First claim

What is claimed is:

1. A spool braking device for braking the rotation of a spool rotatably supported by a reel body, comprising:
a conductor having a rotating surface and being configured to rotate in conjunction with the spool;
a magnet comprising an N-pole and an S-pole on a surface facing the rotating surface of the conductor; and
a magnetic flux change rate variable mechanism configured to change the change rate of flux in the rotational circumferential direction affected by the magnet at a prescribed rotating surface having a prescribed unit width in a direction orthogonal to the rotational circumferential direction of the conductor via the rotation of the conductor by moving the magnet in an axial direction.

2. The spool braking device recited in claim 1 , wherein
the magnetic flux change rate variable mechanism comprises
a moving mechanism configured to move the magnet in a direction in which the change rate of the flux at a prescribed rotating surface in the rotational circumferential direction of the conductor is increased, with a reaction force to an induction force caused by the magnet via movement of the conductor.

3. The spool braking device recited in claim 1 , wherein
the magnet is turnably supported about an axis orthogonal to the rotating surface of the conductor, and
the magnetic flux change rate variable mechanism comprises
a rotating mechanism configured to rotate the magnet in a direction in which the N-pole and the S-pole are aligned with the rotational circumferential direction of the conductor, at a prescribed unit width in the direction orthogonal to the rotational circumferential direction of the rotating surface.

4. The spool braking device recited in claim 1 , wherein
the magnet is pivotably supported around an axis parallel to the rotational surface of the conductor, and
the magnetic flux change rate variable mechanism comprises
a pivoting mechanism configured to pivot the magnet in a direction in which both the N-pole and the S-pole approach the rotational circumferential direction of the conductor, at a prescribed unit width in a direction that is orthogonal to the rotational circumferential direction of the rotating surface.

5. The spool braking device recited in claim 1 , wherein
the magnet is one of two or more magnets, and
the two or more magnets are disposed in rotationally symmetrical positions, with the rotational axis of the conductor as the symmetrical axis.

6. The spool braking device recited claim 1 , wherein
the spool is a nonmagnetic electrical conductor, and
the spool and the conductor are integrally configured.

7. A fishing reel, comprising:
the spool braking device recited in claim 1 ;
a reel body attached to a fishing rod; and
the spool rotatably supported by the reel body and being configured to wind fishing line onto an outer periphery thereof.

8. A spool braking device for braking the rotation of a spool rotatably supported by a reel body, comprising: a conductor having a rotating surface and being configured to rotate in conjunction with the spool;
a magnet comprising an N-pole and an S-pole on a surface facing the rotating surface of the conductor; and
a magnetic flux change rate variable mechanism configured to change the change rate of flux in the rotational circumferential direction affected by the magnet at a prescribed rotating surface having a prescribed unit width in a direction orthogonal to the rotational circumferential direction of the conductor via the rotation of the conductor
the magnetic flux change rate variable mechanism comprises
a moving mechanism configured to move the magnet in a direction in which the change rate of the flux at a prescribed rotating surface in the rotational circumferential direction of the conductor is increased, with a reaction force to an induction force caused by the magnet via movement of the conductor, and
a biasing unit configured to move the magnet in a direction in which the change rate of the flux at a prescribed rotating surface in the rotational circumferential direction of the conductor is decreased.

9. A spool braking device for braking the rotation of a spool rotatably supported by a reel body, comprising:
a conductor having a rotating surface and being configured to rotate in conjunction with the spool;
a magnet comprising an N-pole and an S-pole on a surface facing the rotating surface of the conductor; and
a magnetic flux change rate variable mechanism configured to change the change rate of flux in the rotational circumferential direction affected by the magnet at a prescribed rotating surface having a prescribed unit width in a direction orthogonal to the rotational circumferential direction of the conductor via the rotation of the conductor,
the magnet is turnably supported about an axis orthogonal to the rotating surface of the conductor, and
the magnetic flux change rate variable mechanism comprises
a rotating mechanism configured to rotate the magnet in a direction in which the N-pole and the S-pole are aligned with the rotational circumferential direction of the conductor, at a prescribed unit width in the direction orthogonal to the rotational circumferential direction of the rotating surface, and
the rotating mechanism comprises
a rotating member rotatably supported about a rotational axis of the conductor,
a cam holding the magnet and being turnably supported by the rotating member around a middle of the N-pole and the S-pole, while maintaining a direction of the surface of the magnet facing the conductor, and
an engagement member engaging the cam and converting the movement of the magnet in a circumferential direction, the circumferential direction being a direction in which the conductor is rotated to turn the cam.

10. A spool braking device for braking the rotation of a spool rotatably supported by a reel body, comprising:
a conductor having a rotating surface and being configured to rotate in conjunction with the spool;
a magnet comprising an N-pole and an S-pole on a surface facing the rotating surface of the conductor; and
a magnetic flux change rate variable mechanism configured to change the change rate of flux in the rotational circumferential direction affected by the magnet at a prescribed rotating surface having a prescribed unit width in a direction orthogonal to the rotational circumferential direction of the conductor via the rotation of the conductor,
the magnet is turnably supported about an axis orthogonal to the rotating surface of the conductor, and
the magnetic flux change rate variable mechanism comprises
a rotating mechanism configured to rotate the magnet in a direction in which the N-pole and the S-pole are aligned with the rotational circumferential direction of the conductor, at a prescribed unit width in the direction orthogonal to the rotational circumferential direction of the rotating surface, and
the rotating mechanism comprises
a rotating member rotatably supported around a rotational axis of the conductor,
a pinion holding the magnet, and including outer teeth on a periphery toward the surface of the magnet facing the conductor, and being turnably supported by the rotating member around a middle of the N-pole and the S-pole, while maintaining a direction of the surface of the magnet facing the conductor, and
a rack meshing with the outer teeth of the pinion, including flat teeth formed in one row in the rotational circumferential direction of the conductor, and being fixed to the reel body.

Assignees

• Shimano Kk

Inventors

• Ikebukuro Satoshi

Classifications

• A01K89/01555 Primary

  using magnets · CPC title