JP-7856967-B2 - Ball bearings, fishing reels, methods for modifying fishing reels

Inventors

• 平本 靖雄

Assignees

• 株式会社ワイズクラフト

Dates

Publication Date

20260512

Application Date

20220307

Claims (4)

1. A method for modifying a double-bearing type fishing reel, The bearing removal process involves removing the original ball bearing attached to the spool shaft, which is the axis of rotation of the spool around which the fishing line is wound. A bearing installation step involves installing a ball bearing in the position where the original ball bearing was installed , the ball bearing having an inner ring with a substantial thickness greater than the outer ring, and the ball dimensions of the multiple steel balls held between the inner ring and the outer ring being smaller than the ball size of the steel balls provided in the original ball bearing . A method for modifying a fishing reel, characterized by performing the following:
2. In the method for modifying a fishing reel according to claim 1, A method for modifying a fishing reel, wherein, during the bearing installation process, a ball bearing is installed in which the effective thickness of the inner ring is 1.5 times or more than the effective thickness of the outer ring.
3. In the method for modifying a fishing reel according to claim 1, A method for modifying a fishing reel, wherein, during the bearing attachment process, a plurality of ball bearings are attached to one end or both ends of the spool shaft.
4. In the method for modifying a fishing reel according to claim 1, A method for modifying a fishing reel, which involves replacing only the original ball bearing that was attached to either the left or right shaft of the spool shaft.

Description

This invention relates to a ball bearing, a fishing reel equipped with the ball bearing, and a method for modifying a fishing reel using the ball bearing. A fishing reel, attached to a fishing rod, is a fishing tool used to wind up fishing line. These fishing reels are classified into types such as double-bearing type, spinning type, or spin-cast type, depending on their structural differences. Among these, the double-bearing type fishing reel has a structure in which both ends of the spool shaft, which is the rotation axis of the spool for winding the fishing line, are supported by ball bearings. Because this type of fishing reel is designed to wind the fishing line perpendicular to the spool shaft while the spool rotates, it has the advantage of having a stronger winding force compared to reels with other structures. On the other hand, since the fishing line is released against the rotational resistance of the spool, it was difficult to cast relatively light rigs a long distance. In this regard, the invention described in Patent Document 1 below (a fishing reel) reduces frictional resistance during rotation within the bearing by decreasing the outer diameter of the ball bearing, thereby improving the rotational performance of the spool. Japanese Patent Publication No. 2006-34254 Figure 1(a) is a front view showing one embodiment of the ball bearing of the present invention, and Figure 1(b) is a cross-sectional view of the ball bearing of the present invention taken along line A-A.Figure 2(a) is a perspective view showing one embodiment of the reel of the present invention, and Figure 2(b) is a perspective view showing the spool of the reel of the present invention.Figures 3(a) to 3(c) are perspective views illustrating the implementation of the modification method of the present invention.Figure 4(a) is a cross-sectional view showing the spool shaft with the original ball bearing attached, and Figure 4(b) is a cross-sectional view showing the spool shaft with the ball bearing of the present invention attached.Figure 5 is a perspective view showing a spool of the reel according to another embodiment of the present invention. The embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to these embodiments. <Ball bearing 1 of the present invention> Figure 1 shows the ball bearing 1 of the present invention. The ball bearing 1 of the present invention comprises an inner ring (2), an outer ring (3) arranged concentrically with the inner ring 2, and a plurality of steel balls (4) held between the inner ring 2 and the outer ring 3. -Inner circle 2- The inner ring 2 serves as the inner raceway ring of the ball bearing 1 of the present invention. In this embodiment, the inner ring 2 has an inner diameter of 3 mm. Furthermore, an outer circumferential groove 21 is provided on the outer circumferential surface of the inner ring 2, which runs along the circumferential direction. -Outer ring 3- The outer ring 3 serves as the outer raceway ring of the ball bearing 1 of the present invention. In this embodiment, the outer ring 3 has an outer diameter of 10 mm. Furthermore, an inner circumferential groove 31 is provided on the inner circumferential surface of the outer ring 3, which runs along the circumferential direction. -Steel ball 4- The steel balls 4 serve as raceway bodies that roll between the two raceway rings, the inner ring 2 and the outer ring 3. In this embodiment, the steel balls 4 have a ball size of 1.1906 mm. Furthermore, the steel balls 4 are held in a state where multiple (nine in this embodiment) are sandwiched between the outer circumferential groove 21 of the inner ring 2 and the inner circumferential groove 31 of the outer ring 3, and each steel ball 4 is arranged at equal intervals by a member called a "retainer" (not shown). Furthermore, in the ball bearing 1 of the present invention having the above configuration, the effective thickness (T1) of the inner ring 2 is greater than the effective thickness (T2) of the outer ring 3. In this invention, the effective thickness (T1) of the inner ring 2 refers to the distance from the inner circumferential surface of the inner ring 2 to the bottom of the outer circumferential groove 21. Also, in this invention, the effective thickness (T2) of the outer ring 3 refers to the distance from the outer circumferential surface of the outer ring 3 to the bottom of the inner circumferential groove 31. <Reel 10 of the present invention> Figure 1 shows the reel 10 of the present invention. The reel 10 of the present invention is a double-bearing type fishing reel and has a structure in which the ball bearing 1 of the present invention is attached to the spool shaft 12 which is the rotation axis of the "spool (11)". -Spool 11- The spool 11 is a part of the reel 10 of the present invention for winding fishing line, and is designed to rotate around the spool shaft 12 as the center of rotation