An electromagnetic brake mechanism for a fishing reel and a fishing reel

Abstract

The application relates to the technical field of fishing reels, in particular to an electromagnetic brake mechanism for a fishing reel, which is provided with a line cup, a line cup rotating shaft, a permanent magnet unit, a coil module and a control unit. The control unit comprises a circuit board and a gear adjuster. The circuit board is arranged at the end of the line cup rotating shaft and is connected with the gear adjuster through a wire. The gear adjuster adjusts the resistance value of an adjustable potentiometer in the circuit board through mechanical transmission, controls the loop impedance of the coil in stages and adjusts the intensity of induced current, so that the coil generates an induced magnetic field which restrains the rotation of the permanent magnet unit. Through the electrical connection between the circuit board of the control unit and the gear adjuster, the accurate control of the coil current in stages is realized. The user can adjust the gear according to actual needs (such as the size of fish and the speed of line release), and then change the magnetic field intensity generated by the coil, so that the flexible adjustment of the brake force is realized and the diversified fishing scenes are adapted.

Description

Technical Field

[0001] This utility model relates to the field of fishing reel technology, and in particular to an electromagnetic braking mechanism for fishing reels and a fishing reel. Background Technology

[0002] As a core component of fishing gear, the fishing reel is a crucial tool for controlling the release and retrieval of the fishing line, achieving precise casting, and traction of the catch. During fishing, the performance of the fishing reel directly affects the angler's ability to control the fish and the fishing experience. Through the cooperation of its mechanical structure and power system, it enables smooth release and retrieval of the fishing line, control of casting distance, and buffering of the pulling force on the fish.

[0003] However, existing fishing reel braking systems have shortcomings. Traditional mechanical braking systems mostly use the friction braking principle, generating resistance through the mechanical contact between the brake pads and other components and the spool. This is prone to unstable braking force due to component wear, and after prolonged use, problems such as jamming and abnormal noises can occur, affecting the user experience and the lifespan of the equipment. At the same time, the adjustment method of mechanical brakes is often relatively coarse, making it difficult to achieve precise force control. When dealing with fish of different sizes or complex fishing conditions, it is impossible to quickly adjust the braking force, either causing the fishing line to break due to excessive braking force or allowing the fish to escape due to insufficient braking force. In addition, existing braking systems lack the ability to monitor and intelligently control the operating status of the fishing reel in real time, and cannot adaptively adjust the braking force based on dynamic data such as spool speed and fishing line tension, making it difficult to meet the diverse needs of complex fishing scenarios. Summary of the Invention

[0004] To address the above problems, this application provides an electromagnetic braking mechanism for fishing reels, comprising a spool, a spool shaft within the spool, and further comprising:

[0005] The permanent magnet unit includes an annular radially magnetized magnet, the inner hole of which is fixedly sleeved on the spool shaft, and the outer circumferential surface is equidistantly and alternately arranged with N poles and S poles.

[0006] A coil module unit, comprising a housing and a built-in series coil, wherein the housing is coaxially arranged around the magnet and a radial gap of 0.5-1mm is formed between the two.

[0007] The control unit includes a circuit board and a gear adjuster. The circuit board is located at the end of the spool shaft and is connected to the coil and the gear adjuster via wires. The gear adjuster adjusts the resistance of the adjustable potentiometer in the circuit board through mechanical transmission, and controls the coil circuit impedance in different gears to adjust the intensity of the induced current, so that the coil generates an induced magnetic field that suppresses the rotation of the permanent magnet unit.

[0008] In one embodiment, the control unit further includes a sensing circuit and a brightness differentiation module; the sensing circuit includes a Hall sensor disposed on the circuit board for detecting the rotational speed of the spool shaft; the brightness differentiation module is connected to the circuit board and includes a light emitter and a light guide strip, configured to display brake gear, rotational speed status or fault information through different colors or flashing modes.

[0009] In one embodiment, the sensing circuit further includes an MCU connected to the Hall sensor, configured to: calculate the real-time wire output speed based on the rotational speed of the spool shaft, and generate a control signal based on the difference between the rotational speed and the wire output speed; and automatically adjust the induced current intensity to suppress the rotation of the permanent magnet unit by adjusting the on / off state of the switching transistor in the circuit board to change the coil circuit impedance.

[0010] In one embodiment, the coil module unit includes multiple sets of coils, which are evenly distributed radially around the axial centerline of the spool shaft and correspond to the magnetic poles of the permanent magnet unit.

[0011] In one embodiment, the gear adjuster includes a control knob, a transmission pin, and a knob connecting plate; the control knob is connected to the circuit board via the transmission pin, and a limiting spring is sleeved on the transmission pin; a waterproof seal is provided between the control knob and the knob connecting plate, the waterproof seal being an O-ring that also serves as a damping element to provide operating resistance.

[0012] In one embodiment, the circuit board integrates a Bluetooth module, which enables wireless communication with external devices.

[0013] A fishing reel includes a reel housing, a rocker arm, and an electromagnetic braking mechanism installed in the reel housing, wherein the electromagnetic braking mechanism is the aforementioned electromagnetic braking mechanism.

[0014] The beneficial effects of this utility model are as follows:

[0015] This application discloses an electromagnetic braking mechanism for fishing reels. By setting an annular radially magnetized magnet and fixing it onto the spool shaft, synchronous rotation of the permanent magnet unit and the spool is achieved. The alternating N and S poles on the outer circumference of the permanent magnet form a rotating magnetic field, providing a stable and periodically changing magnetic field source for subsequent electromagnetic induction, ensuring the uniformity and stability of the braking force. By coaxially surrounding the magnet with the coil module unit's encapsulation housing and maintaining a 0.5-1mm radial air gap, efficient magnetic field coupling is achieved. This avoids wear and noise caused by mechanical contact and ensures the effectiveness of magnetic flux changes, making the generation of induced current more sensitive and improving braking response speed. Through the electrical connection between the control unit's circuit board and the gear adjuster, precise gear control of the coil current is achieved. Users can adjust the gear according to actual needs (such as fish size and line release speed), thereby changing the magnetic field strength generated by the coil and flexibly adjusting the braking force to adapt to diverse fishing scenarios. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the spool.

[0018] Figure 3 This is a schematic diagram of the coil module unit structure;

[0019] Explanation of symbols in the diagram:

[0020] 1. Thread spool;

[0021] 2. Spool spindle;

[0022] 3. Permanent magnet unit; 31. Magnet;

[0023] 4. Coil module unit; 41. Encapsulation housing. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0025] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] like Figure 1-3 As shown, an electromagnetic braking mechanism for a fishing reel includes a spool 1, a spool shaft 2 within the spool 1, and further includes:

[0027] The permanent magnet unit 3 includes an annular radially magnetized magnet 31, whose inner hole is fixedly sleeved on the spool shaft 2, and whose outer circumferential surface is equidistantly and alternately arranged with N poles and S poles.

[0028] The coil module unit 4 includes a housing 41 and a built-in series coil. The housing 41 is coaxially arranged around the magnet 31, and a radial gap of 0.5-1mm is formed between the two.

[0029] The control unit includes a circuit board and a gear adjuster. The circuit board is located at the end of the spool shaft 2 and is connected to the coil and the gear adjuster via wires. The gear adjuster adjusts the resistance of the adjustable potentiometer in the circuit board through mechanical transmission, and controls the coil circuit impedance in different gears to adjust the intensity of the induced current, so that the coil generates an induced magnetic field that suppresses the rotation of the permanent magnet unit.

[0030] Specifically, the spool shaft 2 passes through the center of the spool 1, providing the rotation axis for the entire mechanism. The annular radially magnetized magnet 31 in the permanent magnet unit 3 has its inner hole tightly fitted onto the spool shaft 2, forming a stable fixed connection. The outer circumferential surface of the magnet 31 has N and S poles arranged alternately at equal intervals along the circumference. Simultaneously, the spool 1 is also fixedly mounted on the spool shaft 2, allowing the spool 1 and permanent magnet unit 3 to rotate synchronously with the spool shaft 2. The encapsulation shell 41 of the coil module unit 4 coaxially surrounds the magnet 31, maintaining a radial gap of 0.5-1mm between them. The built-in series coil is fixed inside the encapsulation shell 41 and can be detachably installed in the space between the magnet 31 and the spool 1, achieving a relative positional layout with the permanent magnet unit 3. The control unit's circuit board is located at one end of the spool shaft 2 and connected to it. It is electrically connected to the coil of the coil module unit 4 via wires. The gear adjuster is also electrically connected to the circuit board, thus forming a complete circuit system. When the fishing reel is cranked or the fishing line pulls the spool 1, the spool 1 drives the spool shaft 2 to rotate synchronously. The permanent magnet unit 3 rotates together with the spool shaft 2, and the N and S poles arranged alternately on its outer circumference form a rotating magnetic field. The housing 41 of the coil module unit 4 coaxially surrounds the magnet 31. When the magnet 31 rotates, the magnetic flux through the coil changes periodically. According to the law of electromagnetic induction, an induced electromotive force is passively generated in the coil. The induced electromotive force forms an induced current in the closed loop of the coil. The induced current generates an induced magnetic field opposite to the magnetic field of the magnet 31. Through the interaction of the magnetic fields, an electromagnetic resistance (i.e., braking force) is generated that opposes the rotation of the magnet 31. The gear adjuster changes the resistance value of the adjustable potentiometer in the circuit board through mechanical transmission, adjusting the circuit impedance in gears (e.g., gears 1-4). At the high gear, the circuit resistance decreases, the induced current increases, the induced magnetic field strengthens, and the braking force increases, which is suitable for rapid braking or dealing with large fish pulling. At the low gear, the induced current decreases, and the braking force weakens, which is suitable for slow line release or delicate operation. In this application, by setting an annular radially magnetized magnet 31 and fixing it onto the spool shaft 2, the synchronous rotation of the permanent magnet unit 3 and the spool 1 is achieved. This allows the N and S poles, which are alternately arranged on the outer circumference of the permanent magnet 31, to form a rotating magnetic field, providing a stable and periodically changing magnetic field source for subsequent electromagnetic induction, ensuring the uniformity and stability of the braking force. By setting the encapsulation shell 41 of the coil module unit 4 coaxially around the magnet 31 and maintaining a radial air gap of 0.5-1mm, efficient magnetic field coupling is achieved. This avoids wear and noise caused by mechanical contact and ensures the effectiveness of magnetic flux changes, making the generation of induced current more sensitive and improving the braking response speed. Through the electrical connection between the control unit's circuit board and the gear adjuster, precise control of the coil current in different gears is achieved. Users can adjust the gear according to actual needs (such as the size of the fish and the speed of casting), thereby changing the magnetic field strength generated by the coil and achieving flexible adjustment of the braking force to adapt to diverse fishing scenarios.

[0031] like Figure 1 , 2 As shown, the control unit also includes a sensing circuit and a brightness differentiation module; the sensing circuit includes a Hall sensor, which is disposed on the circuit board and is used to detect the rotational speed of the spool shaft 2; the brightness differentiation module is connected to the circuit board and includes a light emitter and a light guide strip, configured to display the brake gear, rotational speed status or fault information through different colors or flashing modes.

[0032] Specifically, a Hall sensor is set in the sensing circuit to detect the rotation speed of the spool shaft 2, which can obtain the rotation status data of the spool in real time. This provides a dynamic basis for the control module to accurately adjust the braking force. For example, the braking force is automatically increased when the fishing line is quickly released to avoid the line breaking due to excessive speed. The display module is connected to the circuit board and uses light-emitting elements and light guides to display the braking gear, speed status or fault information in different colors or flashing modes. This allows users to intuitively understand the current working status of the fishing reel without complicated operations, simply by visual observation. For example, a solid green light indicates a low gear and a flashing red light indicates a fault, which facilitates timely adjustment of operation or maintenance of the equipment.

[0033] like Figure 1 , 2 As shown, the sensing circuit also includes an MCU, which is connected to the Hall sensor and configured to: calculate the real-time wire output speed based on the rotation speed of the spool shaft 2, and generate a control signal based on the difference between the rotation speed and the wire output speed; change the coil circuit impedance by adjusting the on / off state of the switching transistor in the circuit board, and automatically adjust the intensity of the induced current to suppress the rotation of the permanent magnet unit 3.

[0034] Specifically, the Hall sensor monitors the rotation speed of the spool shaft 2 in real time with precision. Based on this, the MCU calculates the real-time line release speed and compares the difference between the rotation speed and the line release speed to intelligently determine the current operating status of the fishing reel. Once the difference deviates from the preset range, the MCU quickly generates a control signal and precisely changes the coil circuit impedance by adjusting the on / off state of the switching transistor in the circuit board, thereby automatically adjusting the intensity of the induced current. The entire process does not require manual adjustment of the gear, which greatly improves the response speed and adaptive capability of the braking system. This not only reduces the difficulty of operation but also significantly improves the efficiency and success rate of fish control during fishing.

[0035] like Figure 1 As shown, the coil module unit 4 includes multiple sets of coils, which are evenly distributed radially around the axial centerline of the spool shaft 2 and correspond to the magnetic poles of the permanent magnet unit 3.

[0036] Specifically, the even distribution of multiple coils increases the interaction area with the rotating magnetic field of the permanent magnet unit 3, allowing for more complete changes in magnetic flux and more efficient generation of induced electromotive force and induced current, significantly improving electromagnetic induction efficiency and thus enhancing braking force. In addition, the coils are arranged in a corresponding manner with the magnetic poles of the magnet 31, ensuring that each coil can receive the magnetic field change signal at the optimal position, avoiding braking force fluctuations caused by uneven magnetic field distribution, making the braking effect more stable and uniform, and effectively preventing jerking sensations when the spool rotates.

[0037] like Figure 1 , 3 As shown, the gear adjuster includes a control knob, a transmission pin, and a knob connecting plate; the control knob is connected to the circuit board via the transmission pin, and a limiting spring is sleeved on the transmission pin; a waterproof seal is provided between the control knob and the knob connecting plate, and the waterproof seal is an O-ring rubber ring, which also serves as a damping element to provide operating resistance.

[0038] Specifically, the control knob is connected to the circuit board via a transmission pin, enabling precise transmission of operating commands and ensuring the reliability of gear adjustment. The limiting spring sleeved on the transmission pin applies an elastic limiting force to the control knob, preventing it from shifting arbitrarily due to external impacts and maintaining the stability of the brake gear. The O-ring rubber ring between the control knob and the knob connecting plate serves as both a waterproof seal and a damping element, providing appropriate resistance for knob operation and preventing accidental touches or over-adjustment from affecting the precise control of braking force.

[0039] like Figure 1 , 3 As shown, the circuit board integrates a Bluetooth module, which enables wireless communication with external devices.

[0040] Specifically, by integrating a Bluetooth module onto the circuit board and enabling it to communicate wirelessly with external devices, the fishing reel braking system has been upgraded to be more intelligent and convenient. Users can remotely adjust it within a certain range using external devices such as a mobile app, without having to directly contact the fishing reel.

[0041] This application discloses an electromagnetic braking mechanism for fishing reels. When the fishing reel is cranked or the fishing line pulls the spool 1, the spool 1 drives the spool shaft 2 to rotate synchronously. The permanent magnet unit 3 rotates together with the spool shaft 2, and the N and S poles arranged alternately on its outer circumferential surface form a rotating magnetic field. The encapsulation shell 41 of the coil module unit 4 coaxially surrounds the magnet 31. When the magnet 31 rotates, the magnetic flux through the coil changes periodically. According to the law of electromagnetic induction, an induced electromotive force is passively generated in the coil. This induced electromotive force forms an induced current in the closed loop of the coil. This induced current generates an induced magnetic field opposite to the magnetic field of the magnet 31. Through the interaction of the magnetic fields, an electromagnetic resistance (i.e., braking force) is generated that opposes the rotation of the magnet 31. The gear adjuster changes the resistance of the adjustable potentiometer in the circuit board through mechanical transmission, adjusting the circuit impedance in different gears (e.g., gears 1-4). At the higher gear, the circuit resistance decreases, the induced current increases, the induced magnetic field strengthens, and the braking force increases, making it suitable for rapid braking or dealing with the pulling of large fish; at the lower gear, the induced current decreases, and the braking force weakens, making it suitable for slow line release or delicate operations. In this application, by setting an annular radially magnetized magnet 31 and fixing it onto the spool shaft 2, the synchronous rotation of the permanent magnet unit 3 and the spool 1 is achieved. This allows the N and S poles, which are alternately arranged on the outer circumference of the permanent magnet 31, to form a rotating magnetic field, providing a stable and periodically changing magnetic field source for subsequent electromagnetic induction, ensuring the uniformity and stability of the braking force. By setting the encapsulation shell 41 of the coil module unit 4 coaxially around the magnet 31 and maintaining a radial air gap of 0.5-1mm, efficient magnetic field coupling is achieved. This avoids wear and noise caused by mechanical contact and ensures the effectiveness of magnetic flux changes, making the generation of induced current more sensitive and improving the braking response speed. Through the electrical connection between the control unit's circuit board and the gear adjuster, precise control of the coil current in different gears is achieved. Users can adjust the gear according to actual needs (such as the size of the fish and the speed of casting), thereby changing the magnetic field strength generated by the coil and achieving flexible adjustment of the braking force to adapt to diverse fishing scenarios.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. An electromagnetic braking mechanism for a fishing reel, comprising a spool (1) and a spool shaft (2) disposed therein, characterized in that, Also includes: The permanent magnet unit (3) includes an annular radially magnetized magnet (31), whose inner hole is fixedly sleeved on the spool shaft (2), and the outer circumferential surface is equidistantly and alternately arranged with N poles and S poles; The coil module unit (4) includes a housing (41) and a built-in series coil. The housing (41) is coaxially arranged around the magnet (31) and a radial gap of 0.5-1mm is formed between them. The control unit includes a circuit board and a gear adjuster. The circuit board is located at the end of the spool shaft (2) and is connected to the coil and the gear adjuster by a wire. The gear adjuster adjusts the resistance of the adjustable potentiometer in the circuit board by mechanical transmission and controls the coil circuit impedance in different gears to adjust the intensity of the induced current, so that the coil generates an induced magnetic field that suppresses the rotation of the permanent magnet unit (3).

2. The electromagnetic brake mechanism for a fishing reel according to claim 1, characterized in that, The control unit also includes a sensing circuit and a brightness differentiation module; the sensing circuit includes a Hall sensor, which is disposed on the circuit board and is used to detect the rotation speed of the spool shaft (2); the brightness differentiation module is connected to the circuit board and includes a light emitter and a light guide strip, configured to display the brake gear, rotation speed status or fault information through different colors or flashing modes.

3. The electromagnetic brake mechanism for a fishing reel according to claim 2, characterized in that, The sensing circuit also includes an MCU, which is connected to the Hall sensor and configured to: calculate the real-time wire output speed based on the rotation speed of the spool shaft (2), and generate a control signal based on the difference between the rotation speed and the wire output speed; change the coil circuit impedance by adjusting the on / off state of the switch tube in the circuit board, and automatically adjust the intensity of the induced current to suppress the rotation of the permanent magnet unit (3).

4. The electromagnetic brake mechanism for a fishing reel according to claim 1, characterized in that, The coil module unit (4) includes multiple coils, which are evenly distributed radially around the axial centerline of the spool shaft (2) and correspond to the magnetic poles of the permanent magnet unit (3).

5. The electromagnetic brake mechanism for a fishing reel according to claim 1, characterized in that, The gear adjuster includes a control knob, a transmission pin, and a knob connecting plate; the control knob is connected to the circuit board via the transmission pin, and a limiting spring is sleeved on the transmission pin; a waterproof seal is provided between the control knob and the knob connecting plate, and the waterproof seal is an O-ring rubber ring, which also serves as a damping element to provide operating resistance.

6. The electromagnetic brake mechanism for a fishing reel according to claim 1, characterized in that, The circuit board integrates a Bluetooth module, which enables wireless communication with external devices.

7. A fishing reel, characterized in that, The device includes a fishing reel housing, a rocker arm, and an electromagnetic braking mechanism installed in the fishing reel housing, wherein the electromagnetic braking mechanism is the electromagnetic braking mechanism as described in any one of claims 1-6.

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