Fishing reel brake stepless adjusting device based on rotating magnetic field

Abstract

The utility model discloses a fishing reel brake stepless adjusting device based on a rotating magnetic field, and relates to the technical field of fishing reels. The device comprises a wire wheel seat, a cover plate, an electric control plate and a magnetic induction element, the electric control plate and the magnetic induction element are arranged in a cavity of the cover plate, a magnet bearing shaft is adopted, a bearing end is arranged at the lower end of the shaft, and a magnet with the magnetization direction perpendicular to the axis is fixed in a bottom cavity; the cover plate is provided with an axial limiting mechanism, the axial limiting mechanism is preferably a plurality of limiting pieces which are integrally formed with the cover plate and provided with clamping blocks, and the limiting pieces are clamped with the bearing end to limit axial displacement and allow free rotation. A user operates the knob and other operating pieces to drive the magnet bearing shaft and the magnet to rotate, the magnetic induction element outputs signals through continuous changes of the non-contact induction magnetic field direction, and the electric control board adjusts braking force in a stepless mode according to the signals. The stepless brake control device eliminates the problem of potentiometer abrasion, is simple and compact in structure, and achieves stepless brake control which is long in service life, high in reliability and accurate in adjustment.

Description

Technical Field

[0001] This utility model relates to the field of fishing reels, specifically a stepless adjustment device for fishing reel brakes based on a rotating magnetic field. Background Technology

[0002] Fishing reels are core equipment in modern fishing activities, and the performance of their braking system directly affects casting distance, prevention of line tangling (commonly known as "line breakage"), and maneuverability when fighting fish. With technological advancements, electronic braking systems, due to their ability to provide stable and precisely controllable damping force, have gradually become the mainstream configuration for mid-to-high-end fishing reels. Electronic braking systems typically control the spool speed by adjusting the current intensity of the energized coil to change the strength of the magnetic field, thereby generating electromagnetic damping force (eddy current braking) on ​​the conductor components rotating synchronously with the spool, or by directly controlling the brake (electromagnetic braking).

[0003] In existing technologies, the use of potentiometers as adjustment elements is quite common. For example, an electrically controlled fishing reel disclosed in Chinese patent document CN223247351U uses a knob to rotate a potentiometer via a gear transmission mechanism, thereby changing the resistance value to generate an adjustment signal. While this mechanical contact method is straightforward in structure, it has inherent drawbacks: after prolonged use, the brushes and resistive elements of the potentiometer are prone to wear or oxidation, leading to poor contact, signal fluctuations, gear malfunctions, or abnormal operating noises, significantly limiting its reliability and lifespan. Furthermore, the resistance variation characteristics of the potentiometer make it difficult to achieve truly smooth, continuous, stepless control of the braking force.

[0004] To overcome the contact problem of potentiometers, non-contact magnetic induction adjustment schemes have emerged. These schemes utilize the relative motion between a magnet and a magnetic induction element (such as a Hall sensor) to generate signal changes, thus avoiding mechanical wear in principle. However, some magnetic induction adjustment mechanisms remain complex in practice. For example, a fishing reel electronic brake gear adjustment mechanism disclosed in Chinese patent document CN223168986U requires the conversion of rotational motion into linear displacement of the magnet via lifting guide rails, guide claws, and other mechanisms. This results in a large number of parts, complex structure, and high assembly precision requirements, thereby increasing manufacturing costs. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a stepless adjustment device for fishing reel brakes that can balance reliability, high precision, and structural simplicity.

[0006] The technical solution adopted by this utility model is as follows: A stepless adjustment device for a fishing reel brake based on a rotating magnetic field, comprising a reel seat, a cover plate connected to the reel seat, an electronic control board disposed within the cavity formed by the reel seat and the cover plate, a magnetic induction element disposed on the electronic control board, and further comprising:

[0007] The magnet bearing shaft has its upper end connected to the operating element for driving, so that it rotates around its own axis as the operating element rotates. Its lower end has a bearing end with a diameter larger than its shaft body, and the bottom surface of the bearing end has a cavity.

[0008] A magnet is fixedly housed within the cavity, and its magnetization direction is perpendicular to the axis of the magnet bearing shaft;

[0009] An axial limiting mechanism is provided on the cover plate and cooperates with the bearing end to limit the axial displacement of the magnet bearing shaft while allowing it to rotate freely.

[0010] The magnet corresponds to the position of the magnetic induction element. The magnetic induction element is used to sense the change in the magnetic field generated by the change in the magnetization direction of the magnet during rotation, and outputs an electrical signal to the electronic control board to steplessly adjust the braking force of the fishing reel.

[0011] Furthermore, the axial limiting mechanism includes a plurality of limiting plates arranged around the axis of the magnet bearing shaft. The plurality of limiting plates together form a receiving space adapted to the bearing end. The upper inner side of the limiting plate is provided with an inwardly protruding locking block. The bearing end is accommodated in the receiving space, and its upper end face is limited by the locking block.

[0012] Furthermore, the plurality of limiting pieces are integrally formed with the cover plate.

[0013] Furthermore, the cavity is a cylindrical blind hole, and the magnet is fixed in the cavity by interference fit or adhesive.

[0014] Furthermore, the operating element is a knob or a dial.

[0015] Furthermore, the magnetic sensing element is a Hall sensor or a magnetoresistive sensor.

[0016] The beneficial effects of this utility model are as follows:

[0017] (1) This utility model generates an adjustment signal by rotating a radially magnetized magnet and using a magnetic induction element to non-contactly sense changes in the direction of the magnetic field. This eliminates the stubborn problems of poor contact caused by mechanical contact wear and oxidation, signal jumps and gear failure, and improves the service life and long-term reliability of the adjustment mechanism. It is especially suitable for the harsh use environment of fishing gear that is humid and dusty.

[0018] (2) Compared with the complex magnetic induction lifting mechanism that requires converting rotational motion into linear motion, the magnet bearing shaft of this utility model rotates directly, and the magnet only rotates without axial displacement, which reduces the number of parts, simplifies the assembly process, and effectively reduces material and assembly costs; the magnet rotates directly with the shaft, and the change of its magnetization direction can be captured in real time and continuously by the magnetic induction element, realizing stepless adjustment.

[0019] (3) The axial limiting mechanism consisting of limiting plates and locking blocks securely restricts the bearing end of the magnet bearing shaft within the accommodating space, effectively preventing its axial movement, ensuring the stability of the gap between the magnet and the sensing element, and ensuring its rotational flexibility and smoothness, thus improving the operating feel and signal consistency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the magnet bearing shaft of this utility model.

[0022] Figure 3 This is an exploded view of the entire utility model.

[0023] In the diagram: 1. Wire wheel seat; 2. Cover plate; 3. Magnet bearing shaft; 4. Axial limiting mechanism; 5. Bearing end; 6. Magnet; 7. Electrical control board; 8. Magnetic induction element. Detailed Implementation

[0024] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0025] like Figures 1-3 As shown in the figure, this embodiment provides a stepless adjustment device for the brake of a fishing reel based on a rotating magnetic field. Its core is to achieve stepless adjustment of the braking force by detecting the continuous change of the rotating magnetic field. The main components of the device include a reel seat 1, a cover plate 2, a magnet bearing shaft 3, an axial limiting mechanism 4, a magnet 6, an electronic control board 7, and a magnetic induction element 8.

[0026] The reel seat 1 and the cover plate 2 are detachably connected to form a sealed cavity for housing and protecting the internal precision components.

[0027] The electronic control board 7 is fixedly installed in the cavity described above. As the control core, it is responsible for processing signals and outputting control current to the brake coil of the fishing reel (not shown in the figure). A magnetic induction element 8 is integrated on the electronic control board 7. In this embodiment, a Hall sensor is preferably used to accurately sense changes in the magnetic field.

[0028] The magnet-bearing shaft 3 is a key component that transmits operational actions and carries the magnet. Its upper end is connected to an operating element (not shown in the figure, such as a knob) via a spline or key, allowing the user to directly rotate the magnet-bearing shaft 3 around its own axis when rotating the operating element. The lower end of the magnet-bearing shaft 3 has an integrally formed bearing end 5, the diameter of which is significantly larger than the shaft itself to provide a stable support surface. A cylindrical blind hole is machined at the center of the bottom surface of the bearing end 5 as a cavity for fixing and mounting the magnet 6.

[0029] The magnet 6 is a radially magnetized permanent magnet, meaning its magnetization direction (the direction of the line connecting the N and S poles) is perpendicular to the axis of the magnet bearing shaft 3. The magnet 6 is firmly fixed in the cavity by interference fit or high-strength adhesive, ensuring that it rotates synchronously with the magnet bearing shaft 3 without relative movement.

[0030] The axial limiting mechanism 4 is mounted on the cover plate 2. Its function is to precisely constrain the axial degree of freedom of the magnet bearing shaft 3 while ensuring its flexible rotation. In this embodiment, the axial limiting mechanism 4 consists of four limiting plates evenly distributed around the axis of the magnet bearing shaft 3. These limiting plates and the cover plate 2 are integrally formed by injection molding, together forming a circular receiving space that matches the shape of the bearing end 5. An inwardly protruding locking block is provided on the upper inner side of the limiting plate. During assembly, the bearing end 5 of the magnet bearing shaft 3 is placed into the receiving space from top to bottom, and the locking block engages with the upper surface of the bearing end 5, thereby effectively preventing the magnet bearing shaft 3 from moving axially upwards, but without interfering with its circumferential rotation.

[0031] The working principle of this utility model is as follows:

[0032] The user rotates the operating component, driving the magnet-bearing shaft 3 and the magnet 6 at its bottom to rotate together. Since the magnet 6 is radially magnetized, its rotation causes a continuous change in its magnetic pole direction (i.e., the direction of the spatial magnetic field) relative to the fixed magnetic induction element 8 below. The magnetic induction element 8 (Hall sensor) detects this changing magnetic field signal in real time and converts it into a continuous electrical signal, which is then transmitted to the electronic control board 7. Based on this continuous change in signal, the electronic control board 7 steplessly adjusts the current output to the brake coil, thereby achieving precise and smooth control of the fishing reel's braking force.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A stepless adjustment device for a fishing reel brake based on a rotating magnetic field, comprising a reel seat (1), a cover plate (2) connected to the reel seat (1), an electronic control board (7) disposed within a cavity formed by the reel seat (1) and the cover plate (2), and a magnetic induction element (8) disposed on the electronic control board (7), characterized in that, Also includes: The magnet bearing shaft (3) has its upper end connected to the operating component for driving, so that it rotates around its own axis as the operating component rotates. Its lower end is provided with a bearing end (5) with a diameter larger than its shaft body. A cavity is opened on the bottom surface of the bearing end (5). A magnet (6) is fixedly housed in the cavity, and its magnetization direction is perpendicular to the axis of the magnet bearing shaft (3); An axial limiting mechanism (4) is provided on the cover plate (2) and cooperates with the bearing end (5) to limit the axial displacement of the magnet bearing shaft (3) while allowing it to rotate freely. The magnet (6) is positioned corresponding to the magnetic induction element (8). The magnetic induction element (8) is used to sense the change in the magnetic field generated by the magnet (6) due to the change in its magnetization direction during rotation, and outputs an electrical signal to the electronic control board (7) to steplessly adjust the braking force of the fishing reel.

2. The stepless adjustment device for a fishing reel brake based on a rotating magnetic field as described in claim 1, characterized in that, The axial limiting mechanism (4) includes multiple limiting pieces arranged around the axis of the magnet bearing shaft (3). The multiple limiting pieces together form a receiving space adapted to the bearing end (5). The upper inner side of the limiting piece is provided with an inwardly protruding locking block. The bearing end (5) is accommodated in the receiving space, and its upper end face is limited by the locking block.

3. The stepless adjustment device for a fishing reel brake based on a rotating magnetic field as described in claim 2, characterized in that, The plurality of limiting pieces are integrally formed with the cover plate (2).

4. The stepless adjustment device for fishing reel brakes based on a rotating magnetic field as described in claim 1, characterized in that, The cavity is a cylindrical blind hole, and the magnet (6) is fixed in the cavity by interference fit or adhesive.

5. The stepless adjustment device for a fishing reel brake based on a rotating magnetic field as described in claim 1, characterized in that, The operating element is a knob or a dial.

6. The stepless adjustment device for a fishing reel brake based on a rotating magnetic field as described in claim 1, characterized in that, The magnetic sensing element (8) is a Hall sensor or a magnetoresistive sensor.

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