Fishing reel equipped with spool rotation control mechanism

Abstract

The present invention solves the problem of holding a bailcaster reel equipped with a conventional backlash-preventing mechanism.　A cam mechanism used for the backlash-preventing mechanism is composed of a cam shaft and a cam shaft contact end part having a specific shape.

Description

Fishing reel with spool rotation control mechanism

[0001] The present invention relates to a fishing reel equipped with a spool rotation control mechanism, and more particularly to a fishing reel equipped with a mechanism that controls the rotation of the spool using an electromagnetic brake.

[0002] Fishing reels come in three varieties: spinning reels, dual-bearing reels, and single-bearing reels. In spinning reels, the spool is attached to the reel body so that it can move back and forth, while in dual-bearing and single-bearing reels, the spool is supported on the reel body so that it can rotate freely. Due to this structure, dual-bearing and single-bearing reels can directly bear the force applied to the line on the spool, and are used as baitcasting reels to cast heavy lures and tackle (hereinafter referred to as lures, etc.).

[0003] On the other hand, dual-bearing and single-bearing reels, because the force applied to the line is directly received by the spool, have the problem of the line becoming tangled around the spool during casting (a phenomenon known as backlash). Specifically, when a lure is cast, the lure flies in a parabolic arc, pulling the fishing line connected to it and unwinding it from the spool's bobbin. The spool's rotational speed is not particularly fast immediately after the lure is released, but it subsequently increases to match the lure's flight speed. Once the lure passes the apex of the parabola, the lure's flight speed decreases due to air resistance, etc., while the spool, due to the law of inertia, continues to rotate without significantly slowing down. When the lure hits the water, the force pulling the fishing line from the lure becomes zero, but the spool continues to rotate, albeit at a slower speed. As a result, the amount of fishing line supplied from the bobbin trunk of the spool becomes greater than the amount of fishing line pulled by the lure or the like, resulting in so-called backlash.

[0004] A common method for preventing backlash is to hold the spool with your thumb to generate frictional braking force when casting (known as thumbing). However, this thumbing operation can only be performed properly by experienced anglers, so there is a demand for a reel that can prevent backlash even for anglers who are not used to using baitcasting reels.

[0005] In response to such demands, baitcasting reels equipped with various mechanisms for preventing backlash have been developed. One such mechanism uses the magnetic force between a magnetic material and a dielectric material to generate a braking force that resists the rotation of the spool. This braking force is adjusted according to the rotational speed of the spool, preventing backlash while suppressing a decrease in the casting distance of lures, etc. (see, for example, Patent Documents 1 and 2).

[0006] Patent No. 3464362 Patent No. 6376572

[0007] However, conventional baitcasting reels equipped with such backlash prevention mechanisms required improvement in several areas. First, in both reels, the cam mechanism for adjusting the distance between the magnetic material and the dielectric material according to the rotational speed of the spool was structured so that the camshaft 32 engaged with the cam groove 31, which was closed from the outside by a partition wall, as shown in Figures 1(a) and 1(b). As a result, when the camshaft 32 moved, it encountered frictional resistance from the two partition walls, requiring a relatively large force to move, resulting in a delay in the camshaft 32 returning to its initial position after casting. Furthermore, with a cam mechanism having such a cam groove 31, foreign matter such as sand easily enters and remains in the cam groove 31 when the reel is used outdoors, and it may not be completely removed even when washed with water. As a result, the remaining foreign matter, such as sand, can cause the reel to malfunction and, in some cases, malfunction. Furthermore, forming the cam groove 31 requires the presence of a metal material around the groove, which prevents the weight of the moving members moved by the cam mechanism from being reduced, and is a factor in the need for a relatively large force to move the cam shaft 32, which is also a factor in preventing the reel from being made lighter. Also, in the reel of Patent Document 1, the cam groove 31 is asymmetrical with respect to the spool shaft, so it was necessary to create different cam mechanisms for reels with handle assemblies disposed on the right and left sides of the reel body.

[0008] The present invention aims to solve the problems associated with conventional baitcasting reels equipped with such backlash prevention mechanisms.

[0009] As a means for solving the above problems, in one embodiment, the present invention provides a baitcasting reel comprising: a spool shaft, optionally a sleeve that covers at least a portion of the spool shaft and is fixed to the spool shaft, and a spool having a bobbin trunk connected to the spool shaft or the sleeve; a reel frame that rotatably holds the spool; and a rotation control mechanism that can control the rotation of the spool, wherein the rotation control mechanism comprises an electromagnetic brake structure that generates a braking force that resists the rotation of the spool, and a braking force adjustment mechanism that adjusts the braking force, and the electromagnetic brake structure has a pair of magnetic bodies and a conductive member, one of the magnetic bodies and the conductive member is arranged in proximity to the braking force adjustment mechanism and the other is arranged in proximity to the reel frame by the braking force adjustment mechanism, the braking force adjustment mechanism comprises: a camshaft provided on the spool shaft or the sleeve and protruding in a direction substantially perpendicular to the axial direction of the spool shaft; a moving member which is a cylindrical member with a circular cross section that is rotatable coaxially with the spool shaft within a certain range and movable in the axial direction of the spool shaft, the moving member having a camshaft contact end engageable with the camshaft; and a biasing member that biases the moving member in the spool axial direction from one end side; the magnetic body or the conductive member is connected to an end of the moving member opposite to the camshaft contact end or its vicinity, and the camshaft contact end has a shape determined by a line inclined with respect to the axis of the spool shaft on the side opposite to the magnetic body or the conductive member side, preferably a shape whose apex is at a position corresponding to the axis of the spool shaft, and which is inclined away from the apex in the vertical direction with respect to the axis of the spool shaft on the side opposite to the magnetic body or the conductive member side, and which is determined by a line that is linearly symmetrical with respect to the spool shaft as a reference; A bait reel is provided in which the biasing member biases the moving member from the side of the magnetic body or the conductive member, causing the camshaft to engage with the camshaft contact end, and the moving member to which the magnetic body or the conductive member is fixed moves in the axial direction of the spool shaft depending on the difference between the rotational speed of the spool and the rotational speed of the moving member, thereby controlling the spacing between the pair of magnetic bodies and conductive members.In a preferred embodiment, a stop position determining member fixed to the spool shaft or the sleeve is provided adjacent to the biasing member directly or via another member on the opposite side of the biasing member from the movable member side, thereby positioning the biasing member and maintaining the biasing force. The stop position determining member is preferably a doughnut-shaped member of a predetermined thickness having a substantially circular through hole at its center through which the spool shaft or the spool shaft having the sleeve can be inserted, and has a plurality of through or bottomed holes of different depths at predetermined intervals in the circumferential direction, and these multiple holes open to the central through hole of the stop position determining member. Meanwhile, the spool shaft or the sleeve is provided with a positioning protrusion protruding substantially perpendicular to the axial direction of the spool shaft near the end of the biasing member opposite the movable member side, and this protrusion fits into one of the multiple holes in the stop position determining member. In a particularly preferred embodiment, of the plurality of holes, holes located opposite each other across the center point of a substantially circular through hole through which the spool shaft can be inserted have approximately the same depth, and on the other hand, the spool shaft or the sleeve is provided with a pair of positioning protrusions that protrude in opposite directions approximately perpendicular to the axial direction of the spool shaft near the end of the biasing member opposite the moving member side, and these pair of protrusions fit into any pair of holes of the plurality of holes in the stop position determining member that have the approximately same depth.

[0010] In the reel of the present invention, the cam mechanism is composed of a camshaft and a camshaft contact end portion having the above-described shape. This camshaft contact end portion has a structure in which approximately half of the partition wall forming the cam groove has been removed, so that the camshaft contacts only one partition wall, and in some cases, temporarily comes out of contact with the partition wall, eliminating frictional resistance from both partition walls. This allows for movement with less force and allows the camshaft to quickly return to its initial position with less force after casting a lure or other lure. Furthermore, because this camshaft contact end portion is open to the outside, even if foreign matter such as sand gets into the cam groove 31, it can be easily removed with water, making cleaning and lubrication of the cam mechanism simple. Furthermore, the metal material required to form the cam groove around the groove is largely eliminated, thereby reducing the weight of the moving parts and ultimately the reel. Furthermore, in a preferred embodiment, the camshaft contact end portion has a vertex at a position corresponding to the axis of the spool shaft and a shape determined by a line that is linearly symmetrical with respect to the spool shaft, so it can perform the same function regardless of the direction of spool rotation. This allows the adjustment mechanism to be configured with the same parts regardless of whether the bait reel 1 is a right-hand model or a left-hand model. Also, in a preferred embodiment, the stop position defining member and, in some cases, the positioning protrusion, described above, allow for easy fine adjustment of the distance between the magnetic body and the conductive member.

[0011] FIG. 1(a) is a schematic diagram showing the cam mechanism of a reel disclosed in Patent Document 1, and FIG. 1(b) is a schematic diagram showing the cam mechanism of a reel disclosed in Patent Document 2.

[0023] FIG. 1(a) is a schematic perspective view showing the exterior of a baitcasting reel according to one embodiment of the present invention.

[0024] FIG. 1(b) is a schematic diagram showing the cam mechanism of a reel disclosed in Patent Document 2.

[0025] FIG. 1(a) is a schematic perspective view showing the exterior of a spool installed in a baitcasting reel according to one embodiment of the present invention.

[0026] FIG. 1(b) is a schematic partial cross-sectional view showing the internal structure of a baitcasting reel according to one embodiment of the present invention. For simplicity of the drawing, some structures have been omitted. Also, the brake adjustment mechanism 18 is shown in a side view, and only the outer peripheral area of ​​the conductive member 17 is shown in cross-section.

[0026] FIG. 1(b) is a partial cross-sectional view showing an overview of an example of an electromagnetic brake structure installed in a baitcasting reel according to one embodiment of the present invention.

[0027] FIG. 1(b) is a partial cross-sectional view showing an overview of another example of an electromagnetic brake structure installed in a baitcasting reel according to one embodiment of the present invention.

[0028] FIG. 1(b) is a partial cross-sectional view showing an overview of yet another example of an electromagnetic brake structure installed in a baitcasting reel according to one embodiment of the present invention.

[0029] FIG. 9 is a perspective view showing a stop position defining member (washer) and a locking member of a moving member used in a baitcasting reel according to one embodiment of the present invention. FIG. 10 is a side view showing a state in which washers of different thicknesses are attached to a spool shaft in a baitcasting reel according to one embodiment of the present invention. FIG. 11A is a schematic diagram showing a donut-shaped stop position defining member having a plurality of holes of different depths in the circumferential direction on the surface facing the moving member in a baitcasting reel according to another embodiment of the present invention, with a protrusion provided on the spool shaft or sleeve that protrudes in a direction approximately perpendicular to the axial direction of the spool shaft being fitted to the stop position defining member. FIG. 11B is a perspective view showing a state before the stop position defining member shown in FIG. 11A is fitted to a spool shaft having a protrusion on the sleeve. FIG. 11C is a cross-sectional view showing a plurality of through-holes or bottomed holes of different depths that the stop position defining member shown in FIGS. 11A and 11B has. A conceptual diagram schematically showing a rotation control mechanism for a baitcasting reel according to one embodiment of the present invention. FIG. 1 is a perspective view showing a braking force adjustment mechanism provided in a bait reel according to one embodiment of the present invention.1 is a perspective view showing a spool shaft having a sleeve with a camshaft attached to a baitcasting reel according to one embodiment of the present invention.

[0034] FIG. 1 is a perspective view showing a moving member with a disk-shaped conductive member attached to its end and a biasing member fitted thereto.

[0035] FIG. 2 is a side view showing a braking force adjustment mechanism with a baitcasting reel according to one embodiment of the present invention.

[0036] FIG. 2 is a perspective view showing a moving member with a disk-shaped conductive member attached to its end and a biasing member fitted thereto.

[0037] FIG. 3 is a perspective view showing a braking force adjustment mechanism with a baitcasting reel according to one embodiment of the present invention.

[0038] FIG. 4 is a perspective view showing a moving member with a disk-shaped conductive member attached to its end and a biasing member fitted thereto.

[0039] FIG. 5 is a perspective view showing a braking force adjustment mechanism with a baitcasting reel according to one embodiment of the present invention.

[0039] FIG. 6 is a perspective view showing a moving member with a disk-shaped conductive member attached to its end and a biasing member fitted thereto.

[0039] In addition, a biasing member 23 is disposed adjacent to the end of the moving member 19 opposite the camshaft contact end 21, and is fixed by a washer 20 and a locking member 26. This is a schematic diagram illustrating the operating conditions of the rotation control mechanism of a baitcasting reel in the early, middle, and late stages when casting a lure or the like with a baitcasting reel according to one embodiment of the present invention.

[0012] An embodiment of the present invention will now be described in detail. However, the present invention should not be understood as being limited to the following embodiment. FIG. 2 is a perspective view showing the exterior of a fishing reel according to one embodiment of the present invention. FIG. 3 is a perspective view showing the exterior of a spool installed in a baitcasting reel according to one embodiment of the present invention. FIG. 4 is a partial cross-sectional view showing, in outline, the internal structure of a baitcasting reel according to one embodiment of the present invention. As shown in FIG. 2, the fishing reel of this embodiment is a dual-bearing reel, a low-profile reel for baitcasting. As shown in FIGS. 2 and 3, this baitcasting reel 1 has a spool 5 having a spool shaft 2 and a bobbin trunk 4 connected to the spool shaft 2, which is rotatably held in a reel frame 6. A handle assembly 10 that transmits rotational motion to the spool shaft 2 is disposed on the side of the reel. A star drag 11 for drag adjustment is provided on the reel frame side of the handle assembly 10.

[0013] The reel frame 6 has a frame body 7 , side covers 8 provided on both sides of the frame body 7 , and a front cover 9 provided in front of the frame body 7 .

[0014] 2, 3, and 4, the spool 5 comprises a spool shaft 2 made of a rod-shaped member, a sleeve 3 that may cover a portion of the spool shaft 2 and be fixed to the spool shaft, and a bobbin trunk 4. The bobbin trunk 4 is made up of a cylindrical bobbin trunk main body 4-1, flanges 4-2 that extend outward on both sides of the bobbin trunk main body, and a spool connecting member 4-3 that is a disk-shaped member that extends from approximately the center of the axial direction of the spool shaft 2 on the inner surface of the bobbin trunk main body 4-1 toward the spool shaft, and that connects the bobbin trunk main body 4-1 and the spool shaft 2 so as to be coaxial. In another embodiment, a sleeve 3 is provided that is fixed to the spool shaft 2 so as to cover at least a portion of the spool shaft 2, and the spool connecting member 4-3 is connected to this sleeve 3, and the spool 5 is fixed to the spool shaft 2 via the sleeve 3 so as to be coaxial with the spool shaft 2.

[0015] There are no particular restrictions on the materials used for the components that make up the spool 5, and they can be made of an appropriate material taking into consideration properties such as strength, corrosion resistance, weather resistance, scratch resistance, and density. The spool shaft and sleeve can be made of stainless steel or an aluminum alloy, for example, and the bobbin trunk can be made of a titanium alloy or a magnesium alloy, for example.

[0016] As shown in FIG. 4, the spool 5 is rotatably held by the reel frame 6 via a bearing 25, preferably detachably held by the reel frame 6, with the spool shaft 2 serving as the rotation axis. As shown in FIG. 2, the handle assembly 10 is disposed to the side of the reel frame 6 (side cover 8), and includes a handle 10-1 that is rotatable about the rotation axis, and a transmission mechanism (not shown) that transmits the rotational force of the handle to the spool shaft 2. This reel is also provided with a level winder 12 on the side from which the line is let out (upper side of the drawing in FIG. 2) to ensure even winding of the line, and a clutch lever 13 on the opposite side from the side from which the line is let out (lower side of the drawing in FIG. 2) that is connected to a clutch mechanism that switches between a state in which the rotational force of the handle 10-1 can be transmitted to the spool shaft 2 and a state in which the spool 5 is in a free rotation state and the line wound on it can be released.

[0017] When casting a lure, the caster turns off the clutch lever 13, holds the fishing line with his thumb or other tool to prevent the spool 5 from rotating freely, and then releases his thumb or other tool from holding the fishing line when it is time to cast the lure. This puts the spool 5 into a free-spinning state, and the fishing line is pulled by the lure or other tool, unwinding from the bobbin trunk, causing the spool 5 to start rotating.

[0018] 4 to 17, in addition to the basic configuration described above, the baitcast reel of this embodiment is equipped with a rotation control mechanism 14 that can control the rotation of the spool to prevent backlash. The rotation control mechanism 14 of the baitcast reel 1 of this embodiment is equipped with an electromagnetic brake structure 15 and a brake adjustment mechanism 18 that adjusts the braking force.

[0019] The electromagnetic brake structure 15 uses magnetic force to generate a braking force that resists spool rotation. As shown in FIGS. 4 to 8 and 12 , the electromagnetic brake structure 15 is composed of a magnetic body 16 and a conductive body 17. The magnetic body 16 may be any member capable of generating a magnetic field in the conductive body 17, such as a permanent magnet. The conductive body 17 is a conductive member that generates eddy currents on its surface due to the action of the magnetic body 16 when brought close to the magnetic body 16. For example, the conductive body 17 may be composed of a non-magnetic conductive material such as aluminum or an aluminum alloy. Alternatively, the electromagnetic brake structure 15 may be composed of a substrate molded from a synthetic resin such as acrylonitrile butadiene styrene (ABS resin), polyoxymethylene (POM) resin, polyphenylene sulfide (PPS) resin, or polyether ether ketone (PEEK) resin, on which copper or aluminum foil is formed.

[0020] The distance between the pair of magnetic body 16 and conductive member 17 varies depending on the movable member 19, which will be described later, but it is necessary to set the distance between them in their initial positions so that when the movable member 19 brings them closer together, the magnetic body 16 can act on the conductive member 17 to generate eddy currents. The initial positions of the pair of magnetic body 16 and conductive member 17 are determined by the location of the stop position defining member for the movable member, the structure, size, and installation location of the movable member, the installation location, size, and structure of the magnetic body 16 or conductive member 17 connected to the movable member, the structure of the reel frame, and the installation location, size, and structure of the conductive member 17 or magnetic body 16 connected to the reel frame. Since this makes it easy to adjust the amount of eddy current using the brake adjustment mechanism, the two are usually arranged facing each other in the spool axial direction. For example, as shown in Figures 4 and 5, the magnetic body 16 and the conductive member 17 are arranged in a position where, when one of them is connected to the brake adjustment mechanism 18 and the other is connected to the reel frame 6 by the braking force adjustment mechanism 18, an eddy current can be generated on the surface of the conductive member 17 by the action of the magnetic body 16, and they are typically arranged opposite each other in the spool axial direction.

[0021] According to one embodiment, as shown in Figure 6, the conductive member 17 is disk-shaped, and a plurality of magnetic bodies 16 can be arranged at regular intervals, typically equal intervals, around the spool shaft 2 so as to face each other at a distance that allows eddy currents to be generated on the surface of the conductive member 17 by the action of the magnetic bodies 16 when they are brought closer to each other by the braking force adjustment mechanism 18. According to another embodiment, as shown in Figures 7 and 8, the conductive member 17-1 can be cylindrical and coaxial with the spool shaft, while the magnetic bodies 16-1 and 16-2 can have a U-shaped cross section, or can be formed from a pair of two plate-shaped members, and the conductive member 17-1 and the magnetic bodies 16-1 and 16-2 can be configured and arranged so that, when they are brought closer to each other by the braking force adjustment mechanism 18, the cylindrical end of the conductive member 17-1 can be accommodated in a recess of the magnetic body 16-1 having a U-shaped cross section, or in a gap between the pair of plate-shaped magnetic bodies 16-2 facing each other at a regular interval. In this case, the eddy current generated by the magnetic bodies 16-1 and 16-2 acting on the conductive member 17-1 increases in accordance with the penetration amount of the tip portion.

[0022] Furthermore, when it is desired to finely adjust the distance between the pair of magnetic bodies 16 and conductive members 17, as shown in Fig. 10, the thickness of the stop position defining member 20 can be changed or a plurality of stop position defining members 20 can be stacked and used in accordance with the intended distance between the magnetic bodies 16 and conductive members 17, thereby finely adjusting the stop position of the moving member 19. As the stop position defining member 20, for example, a washer 20 shown in Fig. 9 can be used, and as the fixing member for fixing the stop position defining member 20, a locking member 26 such as a clip is preferred because it is easily detachable and can simplify the structure of the braking force adjustment mechanism described below.

[0023] The distance between the pair of magnetic bodies 16 and conductive members 17 can also be finely adjusted by using stop position defining members 27 of different structures shown in Figures 11A to 11C. This stop position defining member 27 is a doughnut-shaped member of a predetermined thickness with a generally circular through-hole at its center through which the spool shaft 2 or sleeve 3 can be inserted. It also has a plurality of through or bottomed holes or grooves 28-1 to 28-4 of different depths spaced at predetermined intervals around the circumference. These holes or grooves 28-1 to 28-4 open to communicate with the central through-hole of the stop position defining member 27. Meanwhile, the spool shaft 2 or sleeve 3 is provided with a positioning protrusion 29 protruding generally perpendicular to the axial direction of the spool shaft 2 near the end of the biasing member 23 opposite the moving member side. The through-hole 28-1 of the stop position defining member 27 is formed in a shape and size that allows the protrusion 29 to pass through. After the protrusion 29 is inserted into this through-hole 28-1, the stop position defining member 27 is rotated so that the protrusion 29 fits into one of the other bottomed holes or grooves 28-2 to 28-4. In a preferred embodiment, as shown in Fig. 11C, holes (28-1, 28-2, 28-3, and 28-4, respectively) at corresponding positions around the center of the central circular through-hole have the same depth and become deeper in the circumferential direction. On the other hand, the spool shaft 2 or the sleeve 3 is provided with two positioning protrusions 29 that protrude in opposite directions substantially perpendicular to the axial direction of the spool shaft 2. The through-hole 28-1 of the stop position defining member 27 is formed in a shape and size that allows the protrusion 29 to pass through, and the protrusion 29 is inserted into this through-hole 28-1 and then rotated to fit into the other bottomed holes or grooves 28-2 to 28-4. The two protrusions 29 provided on the spool shaft 2 or sleeve 3 are fitted into a pair of holes (28-1, 28-2, 28-3, or 28-4) having an appropriate depth depending on the distance between the intended pair of magnetic bodies 16 and conductive members 17, and the stop position defining member 27 is then attached, thereby adjusting the distance between the intended pair of magnetic bodies 16 and conductive members 17.

[0024] As shown in Figures 12 to 16, the braking force adjustment mechanism 18 includes a camshaft 22 provided on the spool shaft 2 or the sleeve 3, a moving member 19 having a camshaft contact end 21 with which the camshaft 22 can engage and to which the magnetic body 16 or the conductive member 17 is connected, and a biasing member 23 that biases the moving member in the spool axial direction from one end side.

[0025] As shown in Figures 12 to 14, the camshaft 22 is mounted on the spool shaft 2 or sleeve 3 and has a generally cylindrical shape, protruding in a direction generally perpendicular to the axial direction of the spool shaft 2. The camshaft 22 can be formed, for example, by forming a bottomed hole or through-hole of a predetermined diameter in the spool shaft 2 or sleeve 3 and fitting a rod-shaped member of the same diameter and predetermined height into the bottomed hole or through-hole. In this case, for example, by forming a screw groove on the inner wall of the bottomed hole or through-hole and forming a screw thread on part of the camshaft 22, the camshaft 22 can be threadedly engaged with and fixed to the bottomed hole or through-hole. Alternatively, part of the camshaft 22 may be glued to the inner wall surface of the bottomed hole or through-hole with an adhesive.

[0026] 12, 13, 15, and 16, the moving member 19 is a cylindrical member with a circular cross section that is rotatable within a certain range coaxially with the spool shaft 2 and movable in the axial direction of the spool shaft 2. The spool shaft 2 or the spool shaft 2 having the sleeve 3 is inserted into the hollow space of the moving member 19, and the moving member 19 is disposed so that a camshaft contact end 21 of the moving member 19 engages with a camshaft 22 provided on the spool shaft 2 or the sleeve 3.

[0027] Additionally, the magnetic body 16 or conductive member 17 is connected to the moving member 19 at or near the end of the spool shaft 2 opposite the cam shaft contact end 21 in the axial direction. Therefore, the moving member 19 is designed and arranged so that the magnetic body 16 or conductive member 17 connected at or near one end thereof can be positioned at a predetermined distance from the conductive member 17 or magnetic body 16 disposed at a predetermined position on the reel frame 6, while the cam shaft 22 engages with the other end 21 to enable predetermined operation.

[0028] The camshaft contact end 21 may have a shape defined by a line inclined relative to the axis of the spool shaft 2. The degree of the inclination angle can be determined and changed taking into account the expected rotational difference between the moving member 19 and the spool shaft 2. If the inclination angle relative to the axis of the spool shaft is acute, the moving speed of the moving member 19 can be increased in response to the rotational difference between the moving member 19 and the spool shaft 2 (in other words, the difference with the rotational speed of the spool). Conversely, if the inclination angle is obtuse, the moving speed of the moving member 19 can be decreased in response to the rotational difference between the moving member 19 and the spool shaft 2. Therefore, the shape of the camshaft contact end 21 can be determined taking this into consideration. Furthermore, since the same parts can be used regardless of whether the handle assembly is installed on the left or right side, it is preferable that the camshaft contact end 21 have a shape defined by a line that is symmetrical with respect to the spool shaft. According to a preferred embodiment, the cam shaft contact end 21 has an apex at a position corresponding to the axis of the spool shaft 2, an inclination from the apex toward the opposite side from the magnetic or conductive member in the vertical direction relative to the axis of the spool shaft, and a shape determined by a line that is symmetrical with respect to the spool shaft. For example, the shape may be a V-shape rotated 90 degrees clockwise and positioned so as to be symmetrical with respect to the spool shaft, a U-shape rotated 90 degrees clockwise and positioned so as to be symmetrical with respect to the spool shaft, or a shape in which two symmetrical arc-shaped lines are connected with an apex at a position corresponding to the axis of the spool shaft. In the reel of the present invention, the moving member 19 does not have a cam groove, and in other words, has a structure in which approximately half of the partition wall that forms the cam groove has been removed. As a result, the cam shaft is restricted by only one partition wall, and in some cases, it temporarily does not contact the partition wall, preventing contact resistance from the two partition walls. Furthermore, the amount of base material around the cam groove that is used to form the cam groove is reduced to approximately half at the camshaft contact end portion, making it possible to reduce the weight of the moving member.

[0029] As shown in Figures 10, 11, 12, and 16, the biasing member 23 biases the moving member 19 from the end of the moving member 19 to which the magnetic body 16 or the conductive member 17 is connected toward the handle assembly (the side opposite to the end to which the magnetic body 16 or the conductive member 17 is connected) in the spool axial direction. The biasing member 23 may be any member that performs this function, and may be formed, for example, of a known spring or an elastic member such as rubber. If the biasing member 23 is formed of a spring, the biasing force can be easily adjusted by adjusting the material and thickness of the spring. Furthermore, the biasing member 23 may be positioned so as to perform the above function. Typically, the biasing member 23 is positioned adjacent to the end of the moving member, either directly or via another member, and is positioned by a stop position determining member 20 attached to the spool shaft 2 or sleeve 3 on the side opposite the moving member, thereby maintaining the biased state.

[0030] In a baitcasting reel equipped with the rotation control mechanism 14 having the electromagnetic brake structure 15 and brake adjustment mechanism 18 described above, when there is a difference between the amount of fishing line supplied from the bobbin body of the spool and the amount of fishing line pulled by a lure or the like, the rotation control mechanism controls the rotation speed of the spool in accordance with the difference between the two, thereby preventing the spool from over-rotating.

[0031] 17, at the beginning of casting, the rotational speed of the spool (not shown) is low, and therefore the rotational force generated by the rotation of the spool (not shown) is smaller than the biasing force of the biasing member 23. In this state, the moving member 19 rotates integrally with the spool shaft 2, and no difference in rotational speed occurs between the moving member 19 and the spool shaft 2, so the cam shaft 22 remains at the apex 21-1 of the cam shaft contact end 21. As a result, the moving member 19 remains in its initial position, and the magnetic body 16 or conductive member 17 connected to it is positioned furthest from the other conductive member 17 or magnetic body 16 that makes up the pair, and the braking force acting against the rotation of the spool (not shown) is smallest.

[0032] On the other hand, when the rotation speed of the spool (not shown) increases in response to the flight speed of the lure or the like, the rotational force of the spool exceeds the biasing force of the biasing member 23. In this state, a difference in rotation occurs between the rotation of the moving member 19 and the rotation of the spool shaft 2, and the cam shaft 22 moves from the apex 21-1 along the cam shaft contact end 21 while abutting against the cam shaft contact end 21, moving the moving member 19 to the opposite side of the cam shaft contact end 21 in the axial direction of the spool shaft 2 (to the left side of the drawing in FIG. 17). As a result, the magnetic body 16 or the conductive member 17 connected to the moving member 19 moves toward the conductive member 17 or the magnetic body 16 held by the reel frame (not shown). The moving speed of the conductive member 17 or the magnetic body 16 depends on the rotational force of the spool (not shown), and the conductive member 17 or the magnetic body 16 can move up to the stop position determined by the stop position determining member 20. Depending on the distance between the pair of conductive member 17 and magnetic body 16, a braking force that resists rotation of the moving member 19 is generated, and via the cam mechanism, a braking force that resists rotation of the spool (not shown) is further generated. As a result, over-rotation of the spool (not shown) is reduced and backlash is prevented. In this reel, the moving member 19 is notched in a V shape to reduce its weight, and the camshaft 22 is not subjected to contact resistance from the two partition walls. This allows the camshaft 22 to move with less force.

[0033] When the lure or the like passes its peak and hits the water, the rotation control mechanism reduces the rotational speed of the spool (not shown), reducing the force with which the camshaft 22 presses the camshaft contact portion 21. Then, when the biasing force of the biasing member (not shown) exceeds the rotational force of the spool, the camshaft 22 moves toward the peak 21-1 of the camshaft contact end 21, along the camshaft contact end 21, or temporarily without contacting the camshaft contact end 21, and finally returns to the peak 21-1 of the camshaft contact end 21. This causes the moving member 19 to move toward the handle (the opposite side of the end to which the magnetic body or conductive member is connected) (the right side of the drawing in FIG. 17 ) in the axial direction of the spool shaft 2, and finally returns to its initial position. As a result, the magnetic body 16 or conductive member 17 connected to the moving member 19 moves away from the conductive member 17 or magnetic body 16 held by the reel frame (not shown), reducing the electromagnetic force that the conductive member 17 receives from the magnetic field of the magnetic body 16. As a result, the braking force against the rotation of the spool also decreases, and is finally at its smallest when it returns to its initial position.In this reel, the moving member 19 is V-notched to reduce its weight, and the camshaft 22 does not experience contact resistance from the two partition walls, so the camshaft 22, and therefore the moving member 19, can be moved with less force during the return operation.

[0034] Through this operation, this reel can apply an appropriate braking force to the spool and effectively prevent backlash without unnecessarily reducing the casting distance.

[0035] 1 Baitcasting reel 2 Spool shaft 3 Sleeve 4 Bolt trunk 4-1 Bolt trunk main body 4-2 Bolt trunk flange 4-3 Spool connecting member 5 Spool 6 Reel frame 7 Frame main body 8 Side cover 9 Front cover 10 Handle assembly 10-1 Handle 10-2 Transmission mechanism 11 Star drag 12 Level winder 13 Clutch lever 14 Rotation control mechanism 15 Electromagnetic brake structure 16 Magnetic body 16-1 Magnetic body composed of a pair of two plate-shaped members 16-2 Magnetic body with a U-shaped cross section 17 Conductive member 17-1 Cylindrical conductive member 18 Brake adjustment mechanism 19 Moving member 20 Stop position determining member (washer) 21 Camshaft contact end 21-1 Vertex 22 Camshaft 23 Urging member 25 Bearing 26 Locking member (clip) 27 Stop position determining member 28 (28-1 to 28-4) Hole 29 Positioning protrusion 31 Cam groove (prior art) 32 Cam shaft (prior art)

Claims

1. A bait-casting reel comprising a spool shaft, optionally a sleeve covering at least a portion of the spool shaft and fixed to the spool shaft, and a spool having a line body connected to the spool shaft or the sleeve, a reel frame rotatably holding the spool, and a rotation control mechanism capable of controlling the rotation of the spool, wherein the rotation control mechanism comprises an electromagnetic brake structure which generates a braking force against the rotation of the spool, and a braking force adjustment mechanism which adjusts the braking force, the electromagnetic brake structure having a pair of magnetic bodies and a conductive member, one of the magnetic bodies and the conductive member being disposed in proximity to the braking force adjustment mechanism and the other being disposed in proximity to the reel frame by the braking force adjustment mechanism, the braking force adjustment mechanism comprises: a camshaft provided on the spool shaft or the sleeve and protruding in a direction substantially perpendicular to the axial direction of the spool shaft; a movable member which is a cylindrical member with a circular cross section and which is rotatable coaxially with the spool shaft within a certain range and movable in the axial direction of the spool shaft and has a camshaft contact end with which the camshaft can be engaged; and a biasing member which biases the movable member in the spool axial direction from one end side; the magnetic body or the conductive member is connected to an end of the movable member opposite to the camshaft contact end or in the vicinity thereof, and the camshaft contact end has a shape determined by a line inclined with respect to the axis of the spool shaft, A bait reel in which the biasing member biases the moving member from the side of the magnetic material or the conductive member, causing the camshaft to engage with the camshaft contact end, and the moving member to which the magnetic material or the conductive member is fixed moves in the axial direction of the spool shaft depending on the difference between the rotational speed of the spool and the rotational speed of the moving member, thereby controlling the distance between the pair of magnetic materials and conductive members.

2. A bait reel as described in claim 1, wherein the cam shaft contact end has an apex at a position corresponding to the axis of the spool shaft, is inclined from the apex toward the opposite side to the magnetic material or conductive member so as to move away from the axis of the spool shaft in the vertical direction, and has a shape determined by a line that is linearly symmetrical with respect to the spool shaft.

3. A bait reel as described in claim 1 or 2, further comprising a stop position determining member fixed to the spool shaft or the sleeve, directly or via another member, adjacent to the biasing member on the opposite side of the biasing member from the moving member, thereby positioning the biasing member and maintaining the biasing force.

4. The bait reel described in claim 3, wherein the stop position determining member is a doughnut-shaped member having a substantially circular through hole in the center through which a spool shaft or a spool shaft having a sleeve can be inserted, and has a plurality of through or bottomed holes of different depths at predetermined intervals in the circumferential direction on the surface facing the movable member, and the plurality of holes open to communicate with the central through hole of the stop position determining member, and on the other hand, the spool shaft or the sleeve is provided with a positioning protrusion protruding substantially perpendicular to the axial direction of the spool shaft near the end of the biasing member opposite the movable member side, and the protrusion fits into one of the plurality of holes in the stop position determining member.

5. A bait reel as described in claim 4, wherein, of the plurality of holes, holes located opposite each other across the center of a substantially circular through hole through which the spool shaft can be inserted have substantially the same depth, and on the other hand, the spool shaft or the sleeve is provided with a pair of positioning protrusions protruding in opposite directions substantially perpendicular to the axial direction of the spool shaft near the end of the biasing member opposite the moving member, and the protrusions fit into any pair of holes having substantially the same depth among the plurality of holes in the stop position determining member.

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