JPH0310865Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a fishing line buckling prevention device using a magnet. Conventionally, U.S. Patent No. 2361239 discloses a method in which magnets are disposed movably in the circumferential direction on the inside and outside of a conductive ring provided on a spool, and the spool is braked by utilizing eddy current generated by rotation of the conductive ring. However, they all have the disadvantage that they cannot be brought into a non-braking state, and the magnets are large and heavy, increasing the weight of the reel, making them particularly unsuitable for small reels. . The present invention aims to improve these defects by arranging magnetic eddy current generators on the inside and outside of a conductive ring made of non-magnetic material that protrudes from one side of the spool to rotate the spool. In a double-bearing type reel configured to brake motion, a plurality of small yokes are arranged on the inside and outside of the conductive ring body to face an annular yoke made of magnetic material and the outside or inside surface thereof at equal intervals. A magnetic pole ring made of a thin magnet is provided so as not to contact the outer plate of the reel side plate, and each of the magnets is formed so that its magnetic poles are in the radial direction and the magnetic poles of adjacent ones are alternately reversed,
Furthermore, the gist is that either the inner or outer magnetic pole ring is formed to be rotatable by an operating handle provided on the reel side plate. An embodiment of the present invention will be described with reference to the drawings. Reel side plates 1 and 2 of a double bearing type reel are respectively formed of outer plates 3 and 3' and inner frames 4 and 4'. A handle 5 and a drive gear mechanism (not shown) are provided to rotate a spool shaft 7 to which a spool 6 is fixed, and a deep-bottomed dish-shaped holding case 8 is attached to the outer plate 3' on the inner frame 4' of the reel side plate 2. The tip of the spool shaft 7 is supported through a bearing 10 in a shaft cylinder 9 which is fitted and fixed toward the center of the holding case 8 and integrally protrudes from the center of the holding case 8. An inner magnetic pole ring 13 consisting of magnets 11 arranged at equal intervals and an annular yoke 12 made of a magnetic material fitted to the inner circumferential surface of the magnets 11 is fixed to the outer surface of the shaft cylinder 9 of the holding case 8. The magnetic poles of the magnets 11 are formed in the radial direction so that the magnetic poles of adjacent ones are alternately reversed, and one side of the spool 6 is made of aluminum copper so as to be located outside the inner magnetic pole ring 13. A conductive ring body 14 made of a non-magnetic material such as the like is provided in a protruding manner within the holding case 8 . Further, on the inner circumferential surface of a rotary cylinder 15 rotatably provided at the bottom of the holding case 8, magnets are arranged at equal intervals so as to be located outside the conductive ring body 14 and to face the magnets 11. 16 and an outer magnetic pole ring 18 consisting of an annular yoke 17 made of a magnetic material fitted onto the outer circumferential surface of the magnet 16, and the magnetic poles of the magnets 16 are arranged in the radial direction and the magnetic poles of adjacent ones are alternately reversed. It is formed. On the other hand, meshing teeth 19 are provided on the outer circumferential surface of the rotary cylinder 15, and the meshing teeth 19 are exposed through a notch 20 provided in the holding case 8 and are attached to an operating handle 21 that is pivotally supported on the outer plate 3'. The operating handle 2 meshes with the gear 22.
1, the rotating body 15 is rotated and the position of the outer magnetic ring body 18 facing the inner magnetic pole ring body 13 can be displaced. Therefore, the flange portion 6' of the spool 6 is attached to the fitting and fixing portion of the holding case 8 to the inner frame 4'.
A fishing line biting prevention edge 23 is integrally formed with the fishing line biting prevention edge 23 which is fitted with a slight gap between the fishing line and the fishing line. Since the embodiment of the present invention is constructed as described above, the gear 2 is rotated by rotating the operating knob 21.
2. When the outer magnetic pole ring 18 is rotated via the meshing teeth 19 and the rotating tube 15, the maximum eddy current is generated in the conductive ring 14 when the different polarities of the magnets 16 and 11 are facing each other. , brake spool 6 to maximum,
As the magnet 16 rotates, its braking force gradually decreases, and when the same polarities of the magnets 16 and 11 face each other, no braking is applied to the spool 6. Therefore, by adjusting the rotation angle, the braking force can be reduced. It prevents the fishing line from collapsing by arbitrarily adjusting the power from no braking to maximum braking. In this invention, the magnetic poles of the magnets arranged at equal intervals on the inside and outside of the conductive ring are formed in the radial direction, and the magnetic poles of adjacent magnets are opposite to each other, so that the spool braking force can be increased from no braking to maximum. It is possible to adjust the braking force proportionally at will, and it is possible to reliably prevent the fishing line from collapsing with any braking force. In some cases, it is possible to cast without braking, and it can easily handle such fishing operations, and can be adapted to an extremely wide range of casting. In addition, in this invention, the magnetic pole rings arranged on the inner and outer sides of the conductive ring are formed by placing small thin magnets at equal intervals on a ring yoke made of magnetic material, so the inner and outer magnetic pole rings can be miniaturized. The weight of the reel can be reduced and it can be easily applied to small reels.Moreover, the magnetic pole ring is located inside the outer plate of the reel side plate and does not come into contact with it, and the annular joint Since it has iron, it goes without saying that iron sand does not stick to the reel side plate, and in particular, the presence of the yoke increases the magnetic force (magnetic flux density) to about twice that of the case without the yoke, as shown in the experimental test below. By forming a high magnetic flux density on the conductive ring body, braking efficiency can be improved and leakage of magnetic lines of force can also be prevented. Comparison test of magnetic force with and without a yoke 1 Test method As shown in Figure 4, a yoke a is fixed on the top surface and 15 cm
magnets with a spacing of 15 cm (test 1) and magnets with a spacing of 15 cm without yoke a (test 2)
In the meantime, a yoke b with a weight W suspended from the center thereof was adsorbed, and the weight of the weight W when each yoke b fell from the magnet was measured. The magnet used is a rare earth cobalt disk magnet with a diameter of 5.
mm, thickness 1.5 mm, maximum energy product 17.0,
Yokes a and b were made of soft iron with a length of 30 mm, a width of 7 mm, and a thickness of 0.5 mm. 【table】

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the present invention, Fig. 2 is a longitudinal sectional side view thereof, Fig. 3 is a perspective view of the main part, and Fig. 4 is an explanatory diagram of an experiment with and without a yoke. 1, 2... Reel side plate, 6... Spool, 11... Magnet, 12... Annular yoke, 13... Inner magnetic pole ring, 14
...Conductive ring body, 15... Rotating tube, 16... Magnet, 17...
Annular yoke, 18...outer magnetic pole ring, 21...operating handle.

Claims (1)

[Scope of utility model registration request] In a double-bearing type reel in which magnetic eddy current generators are disposed oppositely on the inner and outer sides of a conductive ring made of a non-magnetic material protruding from one side of the spool to brake rotation of the spool, the conductive A magnetic pole ring body, which is made up of an annular yoke made of magnetic material and a plurality of small thin magnets arranged to face each other at equal intervals on the outer or inner surface of the ring body, is brought into contact with the outer plate of the reel side plate. Each of the magnets is formed so that its magnetic poles are in the radial direction and the magnetic poles of adjacent ones are alternately reversed, and furthermore, either the inner or outer magnetic pole ring is provided with an operation knob on the reel side plate. A backlash prevention device that can be rotated by hand.