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MarketScreener Homepage  >  Equities  >  Tokyo  >  SHIMANO INC.    7309   JP3358000002

SHIMANO INC.

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Patent Application Titled “Braking Apparatus For Dual-Bearing Reel” Published Online (USPTO 20190223421): Shimano Inc.

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08/14/2019 | 05:12pm EDT

2019 AUG 14 (NewsRx) -- By a News Reporter-Staff News Editor at Sports Research Daily -- According to news reporting originating from Washington, D.C., by NewsRx journalists, a patent application by the inventor NIITSUMA, Akira (Osaka, Japan), filed on December 11, 2018, was made available online on July 25, 2019.

The assignee for this patent application is Shimano Inc. (Osaka, Japan).

Reporters obtained the following quote from the background information supplied by the inventors: “Field of the Invention

“The present invention relates to a braking apparatus for a dual-bearing reel for braking a spool that is rotatably supported by a reel body.

“Background Art

“In a fishing reel, in which a spool, around which a fishing line is wound, rotates when the fishing line is cast (unreeled), there are situations in which backlash occurs, which is when the rotational speed of the spool is faster than a line delivery speed during casting. When the backlash occurs, the fishing line becomes slack, so that the fishing line sags, causing the fishing line to become tangled. Thus, a dual-bearing reel, particularly a bait casting reel for casting a lure attached to a distal end of the fishing line, generally includes a braking apparatus that brakes the spool in order to prevent backlash at the time of casting.

“In the braking apparatus for a dual-bearing reel disclosed in Japanese Patent No. 4039951, when tension detected by a tension detection device is less than or equal to a first predetermined value that is smaller than the initial tension at the time of casting, the spool is braked with a first braking force, which changes in accordance with the initial rotational speed of the spool at the time of casting, during a first predetermined period of time. The braking apparatus brakes the spool with a second braking force, which is weaker than the first braking force, during a second predetermined period of time after the first predetermined period of time has elapsed.

“The braking apparatus for a dual-bearing reel disclosed in Japanese Patent No. 5122273 controls a spool braking device such that the spool is braked with the first braking force. Thereafter, when a tension that is detected by the tension detection device is less than or equal to a reference tension, the braking apparatus controls the spool braking device such that the spool is braked by the second braking force, which augments the first braking force.

“When a spool is braked with a braking force in accordance with the rotational speed of the spool as in the braking apparatus for a dual-bearing reel disclosed in Japanese Patent No. 4039951, there are situations in which, depending on the amount of fishing line, there is excessive or deficient braking of the spool. When the spool is braked with the second braking force, which is greater than the first braking force, when a reduction in the tension is detected, as in the braking apparatus for a dual-bearing reel disclosed in Japanese Patent No. 5122273, there are situations in which the spool is braked excessively, since the spool is braked with a stronger braking force during the latter half of the casting. If the braking for preventing backlash becomes excessive, the flight distance can be reduced. In addition, in the situation where casting is carried out following replacement of various types of lures or spools around which fishing lines of various thicknesses and materials are wound, various parameters change, such as air resistance and flight attitude of the lure during flight, the air resistance of the fishing line, rotational resistance of the spool to casting control, etc., and, in the situation in which a boat is used, such parameters as tailwind and headwind may readily change, so that there are cases in which braking control cannot keep pace with such changing conditions, resulting in excessive or deficient braking of the spool.”

In addition to obtaining background information on this patent application, NewsRx editors also obtained the inventor’s summary information for this patent application: “In view of the circumstances described above, an object of the present invention is to improve the precision of the braking of the spool while suppressing the generation of backlash.

“In order to achieve the above-described object, a braking apparatus for a dual-bearing reel that is rotatably supported by a reel body includes a spool braking device (brake) for braking a spool in an electrically controllable manner, a rotational speed detection device (detector) for detecting a rotational speed of the spool, and a control device (electronic controller) that controls the spool braking device so as to brake the spool with a first braking force for a first predetermined period of time, and controls the spool braking device to brake the spool with a second braking force that is based on a change in the rotational speed after the first predetermined period of time has elapsed.

“Preferably, the control device has an estimated tension calculation unit (calculator) that calculates an estimated tension value that is estimated to act on the fishing line based on the rotational speed detected by the rotational speed detection device, and calculates the estimated tension value based on the change in the rotational speed after the first predetermined period of time has elapsed, and controls the spool braking device to brake the spool with the second braking force that is based on the estimated tension value.

“Preferably, the control device repeats the control of the spool braking device such that, after a prescribed period of time has elapsed after controlling the spool braking device so as to brake the spool with the second braking force, and the estimated tension value is in a first prescribed range, the spool braking device is controlled so as to brake the spool for a first prescribed period of time with the first braking force, and to brake the spool with the second braking force based on the change in the rotational speed after the first prescribed period of time has elapsed.

“Preferably, the control device repeats the control of the spool braking device such that, after a prescribed period of time has elapsed after controlling the spool braking device so as to brake the spool with the second braking force, and the estimated tension value is in a first prescribed range, the spool braking device is controlled so as to brake the spool for a first prescribed period of time with the first braking force, and to brake the spool with the second braking force based on the change in the rotational speed after the first prescribed period of time has elapsed.

“Preferably, the control device also comprises a casting detection unit (detector) that detects that the rotational speed detected by the rotational speed detection device has increased at a predetermined rate, and after the casting detection unit detects that the rotational speed has increased at the predetermined rate, and a second predetermined period of time has elapsed, controls the spool braking device to brake the spool with the first braking force for the first predetermined period of time.

“By the present invention, it is possible to improve the precision of the braking of the spool while suppressing the generation of backlash by braking the spool with the first braking force for the first predetermined period of time and braking the spool with the second braking force that is based on the change in the rotational speed after the first predetermined period of time has elapsed.”

The claims supplied by the inventors are:

“1. A braking apparatus for a spool that is rotatably supported by a reel body, comprising: a spool braking device configured to brake a spool in an electrically controllable manner; a rotational speed detector configured to detect a rotational speed of the spool; and an electronic controller configured to control the spool braking device to brake the spool with a first braking force for a first predetermined period of time, and control the spool braking device to brake the spool with a second braking force that is based on a change in the rotational speed after the first predetermined period of time has elapsed.

“2. The braking apparatus recited in claim 1, wherein the electronic controller has an estimated tension calculator configured to calculate an estimated tension value acting on the fishing line based on the rotational speed detected by the rotational speed detector, and the electronic controller is configured to calculate the estimated tension value based on the change in the rotational speed after the first predetermined period of time has elapsed, and control the spool braking device to brake the spool with the second braking force based on the estimated tension value.

“3. The braking apparatus recited in claim 2, wherein the electronic controller is configured to repeat control of the spool braking device such that, after a prescribed period of time has elapsed after controlling the spool braking device so as to brake the spool with the second braking force, and the estimated tension value is in a first prescribed range, the spool braking device is controlled so as to brake the spool for a first prescribed period of time with the first braking force, and to brake the spool with the second braking force based on the change in the rotational speed after the first prescribed period of time has elapsed.

“4. The braking apparatus recited in claim 2, wherein the electronic controller is configured to repeat control of the spool braking device such that, after a prescribed period of time has elapsed after controlling the spool braking device so as to brake the spool with the second braking force, and the estimated tension value is in a first prescribed range, the spool braking device is controlled so as to brake the spool for a first prescribed period of time with the first braking force, and to brake the spool with the second braking force based on the change in the rotational speed after the first prescribed period of time has elapsed.

“5. The braking apparatus recited in claim 1, wherein the electronic controller further comprises a casting detector configured to detect that the rotational speed detected by the rotational speed detector has increased at a predetermined rate, and after the casting detector has detected that the rotational speed has increased at the predetermined rate, and a second predetermined period of time has elapsed, the electronic controller is configured to control the spool braking device to brake the spool with the first braking force for the first predetermined period of time.”

For more information, see this patent application: NIITSUMA, Akira. Braking Apparatus For Dual-Bearing Reel. Filed December 11, 2018 and posted July 25, 2019. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220190223421%22.PGNR.&OS=DN/20190223421&RS=DN/20190223421

(Our reports deliver fact-based news of research and discoveries from around the world.)

Copyright © 2019 NewsRx LLC, Sports Research Daily, source Health Newsletters

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Financials (JPY)
Sales 2019 366 B
EBIT 2019 69 323 M
Net income 2019 51 360 M
Finance 2019 249 B
Yield 2019 1,04%
P/E ratio 2019 26,9x
P/E ratio 2020 24,1x
EV / Sales2019 3,12x
EV / Sales2020 2,90x
Capitalization 1 390 B
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Number of Analysts 8
Average target price 17 037,50  JPY
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Yozo Shimano President & Representative Director
Takashi Toyoshima Managing Director & Head-Technology
Keiji Kakutani Representative Director & Vice President
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