JPH0641477U - Backlash prevention device for fishing reels - Google Patents

Abstract

(57) [Abstract] [Purpose] In a backlash prevention device for a fishing reel that uses an eddy current generated by a magnet, the conductive ring is made lightweight to improve spool braking efficiency and reduce the reel weight to perform a casting operation. To facilitate. [Structure] A portion of a spool 2 supported by a reel body 1 of a dual-bearing type reel for fishing, in which a conductive ring 3 is projectingly provided and a magnet 4 of a magnetic field forming mechanism 5 of the conductive ring 3 faces. The mounting side portion 3'of the spool 2 other than 3'is made thin, or a lightening hole 7 is provided or is formed by a lightweight member 8 to reduce the moment of inertia of the spool and at the same time reduce the weight of the spool. Improves spool braking efficiency and facilitates casting operation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 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]

[Prior art]

 As a means to prevent the line backlash phenomenon due to the vortex rotation of the spool at the time of discharging the line of the dual-bearing reel for fishing, braking the spool by generating an eddy current with a magnet in the conductive ring provided on the spool. However, it is known as seen in Japanese Utility Model Publication No. 62-33530 and Japanese Utility Model Publication No. 62-33532.

[0003]

[Problems to be solved by the device]

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

[0004]

[Equation 1]

In addition, α is a proportional constant, Bg is a void magnetic flux density (Gauss), Ag is a void area (cm ² ), V is a velocity of the conductive ring body (cm / sec), and S is a plate thickness (cm) of the conductive ring body. ) And ρ are the electrical resistance (Ω-cm) of the conductive ring.

From this, it is the theory that a thicker conductive ring body has a larger braking force. However, if the conductive ring body is made thicker, the spool becomes heavier and the inertia moment of the spool becomes larger, which results in braking. There is a problem that the operation itself is hindered and the reel itself becomes heavy, which adversely affects the casting operation. It is an object of the present invention to provide a fishing reel backlash preventive device which solves these problems, improves the braking force efficiently, and reduces the weight of the reel.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention comprises a conductive ring body projecting from one side of a spool rotatably supported on a reel body, and a magnetic field forming mechanism using a magnet is provided on the conductive ring body. In the reel, whether the spool mounting side portion of the conductive ring body other than the magnet facing portion is formed thin, or a thinned hole is formed, or it is integrally connected by a lightweight member. Thus, the weight of the conductive ring is reduced, and the magnet facing portion means the position when the magnet is arranged so as to generate the maximum braking force. Further, in the case of the present invention, braking efficiency can be further improved by forming a thinned hole in the body of the spool itself.

[0008]

[Action]

 According to the present invention, only the conductive ring body in the facing portion of the magnet of the magnetic field forming mechanism is formed to be thick enough to exert the braking force sufficiently, and the spool mounting side portion of the conductive ring body is made as light as possible. By reducing the weight of the conductive ring body, the moment of inertia of the spool is reduced and at the same time the weight of the spool itself is reduced.

[0009]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. A spool 2 rotatably supported on a reel body 1 of a dual-bearing type reel is separated from a handle shaft drive mechanism during casting to feed a fishing line, as is well known. The conductive ring body 3 made of copper, aluminum, or the like is provided on one side of the conductive ring body 3 in a protruding manner. The magnetic field forming mechanism 5 by the magnets 4 arranged as described above is provided on the reel unit 1 so as to overlap. Therefore, in the conductive ring 3, the facing portion 3'of the magnet 4 on the outer end side is thick, the spool mounting side portion 3 "is thin, and the outer magnet 4 is The turning mechanism 6 is formed so that the position facing the inner magnet 4 can be changed to adjust the braking force.

Since the embodiment of the present invention is configured as described above, the moment of inertia of the spool 2 during casting is small, and the weight reduction of the conductive ring body 3 also reduces the weight of the spool 2. In addition to efficiently performing casting, casting operations can be facilitated 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 are circular holes and elongated holes, respectively, as means for reducing the weight of the spool mounting side portion of the conductive ring 3. The lightening hole 7 is provided. In the fourth embodiment shown in Fig. 7, as the spool mounting side portion 3 "of the conductive ring body 3, a synthetic resin or other lightweight member 8 which is lighter than the conductive ring body 3 is integrally connected. The fifth embodiment shown in FIGS. 8 and 9 is that in the embodiment of FIG. 1, a lightening hole 9 is also provided in the body portion of the spool 2 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, instead of the rotating method of the first embodiment, as shown by a chain line and an arrow in FIG. It is also possible to move the magnets 4 in the axial direction of the spool for adjustment, or to move the inner or outer magnets 4 in the radial direction for adjustment.

[0013]

[Effect of device]

 According to the present invention, in a backlash prevention device that uses eddy currents by a magnet, the portion of the conductive ring facing the magnet is made thick enough to increase the braking force, while the portion on the spool mounting side is made thin. By reducing the spool's weight, the spool's moment of inertia is reduced and the spool's weight is reduced to improve spool braking efficiency and reduce the overall reel weight. It has excellent features and practicality that enable the casting operation to be performed smoothly and easily.

[Brief description of 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 an essential 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 an essential 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 essential parts of a fourth embodiment of the present invention.

FIG. 8 is a vertical 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]

 1 Reel Main Body 2 Spool 3 Conductive Annular Body 3'Magnet Facing Part 3 "Spool Attachment Side Part 4 Magnet 5 Magnetic Field Forming Mechanism 7 Lightening Hole 8 Light Weight Member

Claims (3)

[Scope of utility model registration request] 1. A fishing reel in which a conductive ring is provided on one side of a spool rotatably supported by a reel body, and a magnetic field forming mechanism using a magnet is provided on the conductive ring. The fishing reel backlash prevention device is characterized in that the spool mounting side portion of the conductive ring body, excluding the magnet facing portion, is made thin to reduce the weight. 2. A fishing reel in which a conductive ring body is projectingly provided on one side of a spool rotatably supported on a reel body, and a magnetic field forming mechanism by a magnet is provided on the conductive ring body, the conductive ring body. An anti-backlash device for a fishing reel, characterized in that a lightening hole is formed in the spool mounting side portion of the conductive ring body excluding the magnet facing portion of the above, to reduce the weight. 3. A fishing reel in which a conductive ring body is projectingly provided on one side of a spool rotatably supported by a reel body, and a magnetic field forming mechanism by a magnet is provided on the conductive ring body. The fishing reel backlash prevention device is characterized in that the spool mounting side portion of the conductive ring body excluding the magnet facing portion is integrally connected by a lighter member than the conductive ring body to reduce the weight.