# US 2021/0329897 A1 · Double brake structure, low-profile reel, and fishing tackle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0329897 A1 - Document ID: US20210329897A1 - Status: Published application - Kind: A1 - Application number: 16/898,467 - Filed: 2020-06-11 - Published: 2021-10-28 - Earliest claimed: 2020-04-24 - Assignees: Shenzhen Bosaidong Technology Co., Ltd. - Applicants: Shenzhen Bosaidong Technology Co., Ltd. - Inventors: HONG CHEN; Yingdong Qi - Web page: https://patentgrep.com/patent/US20210329897A1 ## CPC - A01K 89/033: with {a} rotary drum {, i.e. for reels with a rotating spool (antibacklash devices A01K89/0155)} - A01K: ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS ## Abstract A double brake structure includes a line reel rotatably provided, at least one set of centrifugal pin, a centrifugal brake ring movably provided in the centrifugal brake ring, a centrifugal assembly for making the centrifugal pin be close to an inner wall of the centrifugal brake ring and making the centrifugal pin rotate in the centrifugal brake ring when the line reel is rotating, and for automatically adjusting the kinetic friction force between the centrifugal pin and the inner wall of the centrifugal brake ring according to the speed of the line reel when the centrifugal pin contacts with the inner wall of the centrifugal brake ring, and a magnetic brake mechanism for adjusting the speed of the line reel. The present disclosure is easy to use with stable brake performance, and can achieve the function of automatic compensatory braking. ## Claims ### Claim 1 A double brake structure, comprising: a line reel rotatably provided; at least one set of centrifugal pin; a centrifugal brake ring movably provided in the centrifugal brake ring; a centrifugal assembly for making the centrifugal pin be close to an inner wall of the centrifugal brake ring and making the centrifugal pin rotate in the centrifugal brake ring when the line reel is rotating, and for automatically adjusting the kinetic friction force between the centrifugal pin and the inner wall of the centrifugal brake ring according to the speed of the line reel when the centrifugal pin contacts with the inner wall of the centrifugal brake ring; and a magnetic brake mechanism for adjusting the speed of the line reel, and for automatically producing a magnetic induction force opposite to a rotating direction of the line reel when the line reel is rotating. ### Claim 2 (depends on 1) The double brake structure according to claim 1, wherein the centrifugal assembly comprises: a centrifugal seat connected with the line reel for supporting the centrifugal pin; and at least one set of centrifugal elastic piece corresponding to the centrifugal pin, and movably provided on the centrifugal seat through the centrifugal elastic piece. ### Claim 3 (depends on 2) The double brake structure according to claim 2, wherein the elastic force direction of the centrifugal elastic piece is perpendicular to an axis of the line reel. ### Claim 4 (depends on 3) The double brake structure according to claim 3, wherein an axis of the centrifugal seat coincides with the axis of the line reel; at least one set of chute corresponding to the centrifugal pin is provided on the radial direction of the centrifugal seat; one end of the centrifugal pin is provided in the chute, and connected with the centrifugal seat by the centrifugal elastic piece. ### Claim 5 (depends on 1) The double brake structure according to claim 1, wherein the magnetic brake mechanism comprises: a magnetic ring for generating magnetic line of force; a magnetic piece connected with the line reel and located in the magnetic ring; when the line reel rotates, the magnetic piece cuts the magnetic line of force generated by the magnetic ring to produce a magnetic induction force opposite to the rotation direction of the line reel; and an adjustment assembly for driving the magnetic ring to move along an axial direction thereof in order to change the magnetic induction force produced by cutting the magnetic line of force of the magnetic unit. ### Claim 6 (depends on 5) The double brake structure according to claim 5, wherein the adjustment assembly comprises: a magnet base provided with the magnetic ring and movably provided on one side of the line reel for supporting the magnetic ring; a press piece connected with the magnet seat; a reset elastic piece; the press piece is connected with the line reel seat by the reset elastic piece, and the line reel seat is fixedly provided on one side of the line reel and rotatably connected with the axis of the line reel; and a magnetic adjusting knob for exerting pressure on the press piece to make the press piece move in straight line along the axial direction of the magnetic ring. ### Claim 7 (depends on 6) The double brake structure according to claim 6, wherein the magnetic adjusting knob is provided with a thread, the magnetic adjusting knob is threadedly connected with the side cover, and the side cover is fixedly provided on one side of the press piece. ### Claim 8 (depends on 5) The double brake structure according to claim 5, wherein the magnetic ring comprises several groups of magnets; the several groups of magnets are circularly distributed and all of them are curved structures. ### Claim 9 (depends on 6) The double brake structure according to claim 6, wherein the magnetic ring comprises several groups of magnets; the several groups of magnets are circularly distributed and all of them are curved structures. ### Claim 10 A low-profile reel, comprising a fishing vessel body and adorable brake structure; wherein the double brake structure comprises: a line reel rotatably provided; at least one set of centrifugal pin; a centrifugal brake ring movably provided in the centrifugal brake ring; a centrifugal assembly for making the centrifugal pin be close to an inner wall of the centrifugal brake ring and making the centrifugal pin rotate in the centrifugal brake ring when the line reel is rotating, and for automatically adjusting the kinetic friction force between the centrifugal pin and the inner wall of the centrifugal brake ring according to the speed of the line reel when the centrifugal pin contacts with the inner wall of the centrifugal brake ring; and a magnetic brake mechanism for adjusting the speed of the line reel, and for automatically producing a magnetic induction force opposite to a rotating direction of the line reel when the line reel is rotating. ### Claim 11 (depends on 10) The low-profile reel according to claim 10, the centrifugal assembly comprises: a centrifugal seat connected with the line reel for supporting the centrifugal pin; and at least one set of centrifugal elastic piece corresponding to the centrifugal pin, and movably provided on the centrifugal seat through the centrifugal elastic piece. ### Claim 12 (depends on 11) The low-profile reel according to claim 11, wherein the elastic force direction of the centrifugal elastic piece is perpendicular to an axis of the line reel. ### Claim 13 (depends on 12) The low-profile reel according to claim 12, wherein an axis of the centrifugal seat coincides with the axis of the line reel; at least one set of chute corresponding to the centrifugal pin is provided on the radial direction of the centrifugal seat; one end of the centrifugal pin is provided in the chute, and connected with the centrifugal seat by the centrifugal elastic piece. ### Claim 14 (depends on 10) The low-profile reel according to claim 10, wherein the magnetic brake mechanism comprises: a magnetic ring for generating magnetic line of force; a magnetic piece connected with the line reel and located in the magnetic ring; when the line reel rotates, the magnetic piece cuts the magnetic line of force generated by the magnetic ring to produce a magnetic induction force opposite to the rotation direction of the line reel; and an adjustment assembly for driving the magnetic ring to move along an axial direction thereof in order to change the magnetic induction force produced by cutting the magnetic line of force of the magnetic unit. ### Claim 15 (depends on 14) The low-profile reel according to claim 14, wherein the adjustment assembly comprises: a magnet base provided with the magnetic ring and movably provided on one side of the line reel for supporting the magnetic ring; a press piece connected with the magnet seat; a reset elastic piece; the press piece is connected with the line reel seat by the reset elastic piece, and the line reel seat is fixedly provided on one side of the line reel and rotatably connected with the axis of the line reel; and a magnetic adjusting knob for exerting pressure on the press piece to make the press piece move in straight line along the axial direction of the magnetic ring. ### Claim 16 (depends on 15) The low-profile reel according to claim 15, wherein the magnetic adjusting knob is provided with a thread, the magnetic adjusting knob is threadedly connected with the side cover, and the side cover is fixedly provided on one side of the press piece. ### Claim 17 (depends on 14) The low-profile reel according to claim 14, wherein the magnetic ring comprises several groups of magnets; the several groups of magnets are circularly distributed and all of them are curved structures. ### Claim 18 (depends on 15) The low-profile reel according to claim 15, wherein the magnetic ring comprises several groups of magnets; the several groups of magnets are circularly distributed and all of them are curved structures. ### Claim 19 A fishing tackle, comprising a low-profile reel; wherein the low-profile reel comprises a fishing vessel body and a double brake structure, and the double brake structure comprises: a line reel rotatably provided; at least one set of centrifugal pin; a centrifugal brake ring movably provided in the centrifugal brake ring; a centrifugal assembly for making the centrifugal pin be close to an inner wall of the centrifugal brake ring and making the centrifugal pin rotate in the centrifugal brake ring when the line reel is rotating, and for automatically adjusting the kinetic friction force between the centrifugal pin and the inner wall of the centrifugal brake ring according to the speed of the line reel when the centrifugal pin contacts with the inner wall of the centrifugal brake ring; and a magnetic brake mechanism for adjusting the speed of the line reel, and for automatically producing a magnetic induction force opposite to a rotating direction of the line reel when the line reel is rotating. ### Claim 20 (depends on 19) The fishing tackle according to claim 19, wherein the centrifugal assembly comprises: a centrifugal seat connected with the line reel for supporting the centrifugal pin; and at least one set of centrifugal elastic piece corresponding to the centrifugal pin, and movably provided on the centrifugal seat through the centrifugal elastic piece.