Fishing lure

Abstract

To provide a lure with improved stability in a flying posture when it is cast and with an improved speed of returning from the flying posture to a swimming posture.SOLUTION: A lure comprises: a body having a line eye; a rolling element housing space extending in the front-rear directions within the body; a plurality of rolling elements arranged movably in the rolling element housing space; and a magnetization body provided on peripheral walls of the rolling element housing space. One rolling element other than the forefront rolling element out of the plurality of rolling elements is a magnetic rolling element, and the other rolling elements are non-magnetic rolling elements. The entire length of the plurality of rolling elements when the plurality of rolling elements are tightly arranged without gaps between them is 30 to 80 percent of the entire length of the body.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lure. [Background technology]

[0002] Regarding conventional lures, for example, the lure described in Patent Document 1 is known. In the lure described in Patent Document 1, a hollow portion is formed in the lure body in the front-rear direction, and a sinker is housed in the hollow portion so as to be movable in the front-rear direction along an approximate center line, and a sinker holding portion is provided at a front position of the peripheral wall of the hollow portion to hold the sinker. Such a sinker-moving lure can take four positions: a flying position when cast, a landing position when landing on the water, a swimming position when the sinker is held in the sinker holding portion and there is tension in the fishing line, and a basic position when the sinker is held in the sinker holding portion and there is no tension in the fishing line.

[0003] In addition, the lure described in Patent Document 1 has a weight that is easily released from the weight holder during casting, so even if a beginner casts the lure without accelerating the lure sufficiently, the weight will surely be released from the weight holder and move to the rear of the lure. As a result, the lure is less likely to rotate during flight. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 9-238597 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the lure described in Patent Document 1, the weight is biased toward the rear when casting, and the rear part of the lure (the front part when casting) may start to rotate. Also, in the lure described in Patent Document 1, the weight position when casting is far from the weight holding part, so it takes time for the weight to move from the landing posture where the weight remains at the rear end to the swimming posture where it is held by the weight holding part.

[0006] An object of the present invention is to provide a lure which has a stable flying posture when cast and which has an improved speed of returning from the flying posture to the swimming posture. [Means for solving the problem]

[0007] The lure according to the first embodiment of the present invention is a lure comprising a body having a line eye, a rolling body accommodating space extending in the front-rear direction in the body, a plurality of rolling bodies movably arranged in the rolling body accommodating space, and a magnetized body provided on a peripheral wall of the rolling body accommodating space, One of the plurality of rolling elements except for the most distal rolling element is a magnetic rolling element, and the other rolling elements are non-magnetic rolling elements, and the total length of the plurality of rolling elements when aligned without gaps is 30 to 80 percent of the total length of the body.

[0008] A moving object that has a length in the forward / backward direction and moves through a fluid such as air or water becomes most unstable when the part with higher density is biased toward the rear in the direction of movement, and sometimes becomes unstable even when the part is biased toward the front. On the other hand, if the dense parts are distributed along the length along the center line like a log (hereinafter referred to as "log structure"), the weight distribution is not biased and the moving posture of the moving body is stable. The lure according to the first embodiment of the present invention realizes the log structure by arranging many heavy rolling bodies, for example made of metal, along the length of the lure. The total length of the multiple rolling bodies is 30 to 80 percent of the total length of the body. If the total length of the multiple rolling bodies is less than 30 percent of the total length of the body, the moving posture will not be stable, just like a conventional lure, and if the total length of the multiple rolling bodies exceeds 80 percent, the moving distance of the rolling bodies cannot be secured in relation to the total length of the body. In addition, in the description of the behavior of the lure of the present invention, unless otherwise specified, the influence of equipment such as a lip and a fishing hook mounted on the lure, air flow, and water (ocean) current is not taken into consideration. In addition, "water" includes fresh water and sea water.

[0009] The lure according to the second embodiment of the present invention is a lure comprising a body having a line eye, a rolling element storage space extending in the front-rear direction within the body, a plurality of rolling elements movably arranged within the rolling element storage space, and a magnetized body provided on the peripheral wall of the rolling element storage space, in which one rolling element except for the most distal rolling element of the plurality of rolling elements is a magnetic rolling element, and the other rolling elements are non-magnetic rolling elements, and the magnetized body is provided between a position spaced apart from the front end of the rolling element storage space by a distance of 50% or more of the total length of the rolling element storage space and a position of the magnetic rolling element when the plurality of rolling elements are aligned without gaps from the rear end of the magnetic rolling element storage space.

[0010] When casting a lure, a large backward inertial force acts on the rolling body, which moves the rolling body backward and the lure assumes a flying posture. After that, when the lure lands on the water with the rolling body still in the backward state, there is no tension in the thread, and the lure assumes a landing posture with the second center of gravity of the lure and the center of volume of the body (the floating point in water) perpendicular to each other when the rolling body is aligned from the rear end of the rolling body storage space without any gaps. Depending on the angle at which the lure hits the water, the lure may bounce off the water (sea) surface and tilt forward from the horizontal, and may already be in a swimming position by the time the line is pulled; however, this case is not considered an exception in this specification. When the thread is pulled, the lure tilts forward due to the tension, the rolling body moves in front of the lure, and the magnetic rolling body is magnetically attached to the magnetized body. At this time, the rolling bodies in front of the magnetic rolling body are aligned without gaps from the front end of the rolling body storage space, and the rolling bodies behind the magnetic rolling body (sometimes there are none) are aligned without gaps with the magnetic rolling body at the front. In this state, the lure assumes a swimming posture where the tension of the line, the buoyant force acting on the center of buoyancy, and the gravity acting on the center of gravity are in balance. The inclination of the lure changes depending on the tension of the line. When the magnetized body is located at a distance of 50% or more of the total length of the rolling body accommodating space from the front end of the rolling body accommodating space, the moving distance of the magnetic rolling body to the magnetized body is short, and the time required to transition from the landing position to the swimming position is short. In addition, the magnetized body is made of a hard magnetic material such as a magnet, and since magnets are heavy, with a specific gravity of approximately 4.8 for ferrite magnets (sintered), 7.5 for NeFe magnets (sintered), and 7.3 for alnico magnets (cast), the magnetized body being located at a distance of 50% or more of the overall length of the rolling element accommodating space from the front end of the rolling element accommodating space also contributes to the stability of the flying posture. Needless to say, if the magnetized body is located behind the position of the magnetic rolling elements when the rolling elements are lined up without gaps from the rear end of the rolling element accommodating space, the magnetized body will not be able to function properly. Also, once the magnetic rolling body is magnetically attached to the magnetized body, when the tension of the thread is removed, the lure starts to tilt backward from the swimming posture due to the relationship between gravity acting on the center of gravity and the buoyancy acting on the center of buoyancy, and the rolling bodies behind the magnetic rolling body (sometimes there are none) move to the rear. The rolling bodies ahead of the magnetic rolling body are lined up with no gaps at the front, with the magnetic rolling body as the rear end. Then, in that state, the center of gravity and the center of buoyancy move to a basic posture with an inclination that is vertically aligned. In other words, the basic posture is the posture in which the center of gravity and the center of buoyancy are vertically aligned when the magnetic rolling body is magnetically attached to the magnetized body and there is no tension in the thread.

[0011] When the line is pulled again, the lure transitions from the basic position to the swimming position. This motion is then repeated, but the angle of the lure changes depending on the tension of the line. Of the lures of the present invention, at least those in which the magnetic rolling element is not at the rearmost position will have other rolling elements collide with the magnetically attached magnetic rolling element during the transition from the basic position to the swimming position and from the swimming position to the basic position, producing a collision sound. In addition, whether or not the magnetic attraction of the magnetic rolling body is released by another rolling body colliding with the magnetic rolling body magnetically attached to the magnetized body when the lure tilts forward or backward depends on the setting of the magnetic force of the magnetized body. In addition, the lure can tilt at any angle in its basic position as long as it does not reverse front to back, but the degree of this tilt depends on the setting of the center of gravity (third center of gravity) in the basic position. Here, the position separated by a distance of 50% or more of the total length of the rolling element accommodating space is a concept that includes an error in the manufacturing stage of about 5% of the total length of the rolling element accommodating space. Furthermore, the rolling elements in the present invention include magnetic rolling elements and non-magnetic rolling elements.

[0012] A lure according to a third aspect of the present invention is the lure according to the first aspect, When the magnetic rolling body is magnetically attached to the magnetized body, the rolling body in front of the magnetic rolling body is aligned without gaps from the front end of the rolling body storage space, and there is a rolling body behind the magnetic rolling body, the center of gravity axis connecting the first center of gravity of the lure when the rolling bodies behind the magnetic rolling body are aligned without gaps with the magnetic rolling body at the front and the second center of gravity of the lure when the multiple rolling bodies are aligned without gaps from the rear end of the rolling body storage space is located within the rolling body storage space, and the body parallel axis connecting the volumetric center of the body and the center of the line eye is parallel to the center of gravity axis.

[0013] A lure according to a fourth aspect of the present invention is the lure according to the second aspect, When the magnetic rolling body is magnetically attached to the magnetized body, the rolling body in front of the magnetic rolling body is aligned without gaps from the front end of the rolling body storage space, and there is a rolling body behind the magnetic rolling body, the center of gravity axis connecting the first center of gravity of the lure when the rolling bodies behind the magnetic rolling body are aligned without gaps with the magnetic rolling body at the front and the second center of gravity of the lure when the multiple rolling bodies are aligned without gaps from the rear end of the rolling body storage space is located within the rolling body storage space, and the body parallel axis connecting the volumetric center of the body and the center of the line eye is parallel to the center of gravity axis.

[0014] At the initial stage of casting, the smaller the deviation angle between the angle between the center of the line eye and the center of gravity of the swimming posture, i.e., angle 1 between the center of the line eye and the first center of gravity, and angle 2 between the center of the line eye and the center of gravity of the flying posture, the smoother the rolling body moves from the front to the rear of the lure. Furthermore, if the angle between the vector direction of the center of gravity caused by the movement of the rolling body during casting and the parallel axis of the lure's body is large, centrifugal force acts in the direction of the center of gravity axis, which causes the lure to start rotating centrifugaly, resulting in a phenomenon in which the lure cannot be cast at all. Therefore, from the viewpoint of the movement of the rolling elements during the initial casting motion, it is ideal for the center of gravity axis segment to coincide with the body parallel axis segment. Also, from the standpoint of stability in flying posture, it is ideal for the center of gravity axis segment and the body parallel axis segment to coincide.

[0015] On the other hand, in order to stabilize the posture in water, the center of volume of the body (the buoyancy point in water) needs to be above the first and second centers of gravity. Under the condition that the center of volume of the body is above the first and second centers of gravity, the body's parallel axis cannot be made to coincide with the central axis of gravity. Therefore, in the lures according to the third and fourth embodiments of the present invention, the center axis is parallel to the body parallel axis, giving priority to the stability of the flying posture. From the viewpoint of the stability of the flying posture, it is preferable that the center axis is below the floating point and as close to the floating point as possible. Here, "parallel" in the present invention means not only perfect parallelism but also substantial parallelism within a certain error range.

[0016] Next, the behavior of the lure after it hits the water will be described. Depending on the specific gravity of the lure, most of the lure's body may float on the water surface, but in this explanation, we will assume that the lure is almost entirely underwater when it hits the water, and that the buoyancy point is at the center of the body's volume. Some lures have their tip slightly above the water when they hit the water, but this is an assumption that does not cause any problems when explaining their behavior after hitting the water. The center of volume of the body in the water is the same as the center of buoyancy where buoyancy acts on the lure, and the lure's posture is stable when the center of buoyancy and the center of gravity are aligned vertically. The posture of the lure when it hits the water and the rolling body is still at the rear of the lure is called the hitting posture. Then, from the position after landing on the water, tension is applied to the line, the lure tilts forward, and eventually the rolling body starts to move forward. If the axis of gravity and the parallel axis of the body are parallel, the rolling body will start to roll when the tension of the line acting on the line eye tilts the parallel axis of the body forward by about 2 degrees from the horizontal. By positioning the center axis connecting the first center of gravity and the second center of gravity in the rolling body storage space, the lure's transition from the landing position to the swimming position is smooth and quick, and the lure's behavior is stable in all of the flying position, landing position, basic position, and swimming position.

[0017] A lure according to a fifth embodiment of the present invention is the lure according to any one of the first to fourth embodiments, in which the total number of the plurality of rolling elements is five or more.

[0018] The greater the number of rolling bodies, the easier it is for the rolling bodies closest to the tip side to roll to the swimming posture when transitioning from the landing posture to the swimming posture. In other words, the initial movement of the rolling bodies becomes faster. If the sinker were a rod-shaped lump with the same mass as the rolling bodies, frictional resistance would require more time and a greater forward tilt angle to transition to the swimming posture. If the number of rolling bodies is reduced under the same total mass, the moving distance of the rolling bodies when transitioning from the flying posture to the swimming posture increases, and a greater force is required to roll each rolling body forward. Furthermore, when comparing rolling elements of the same mass, the greater the number of rolling elements, the smaller the cross-sectional area of ​​the rolling element storage space can be, making it possible to accommodate a greater variety of lure shapes.

[0019] A lure according to a sixth embodiment of the present invention is a lure according to any one of the first to fourth embodiments, in which a magnetized body is provided at the position of the rearmost rolling body when the rolling bodies are aligned without gaps from the front end of the rolling body storage space, and the rearmost rolling body is a magnetic rolling body.

[0020] The lure according to the seventh embodiment of the present invention is the lure according to the fifth embodiment, in which a magnetized body is provided at the position of the rearmost rolling body when the rolling bodies are aligned without gaps from the front end of the rolling body storage space, and the rearmost rolling body is a magnetic rolling body.

[0021] The lures according to the sixth and seventh embodiments of the present invention are tilted forward from the landing posture due to the tension of the line, and after all the rolling bodies move forward, the rearmost magnetic rolling body is once magnetically attached to the magnetized body in a state where all the rolling bodies are aligned from the front without any gaps. By adjusting the magnetic force of the magnetized body so that the magnetic attachment is not released even if the inclination of the lure in the water changes depending on the presence or absence of tension in the line, all the rolling bodies do not move after transition to the swimming posture, and it is possible to prevent the collision sound of the rolling bodies from being generated.

[0022] A lure according to an eighth embodiment of the present invention is the lure according to the sixth embodiment, and further includes a rolling element recoil mechanism using a coil spring at the rear end of the rolling element accommodating space.

[0023] A lure according to a ninth aspect of the present invention is the lure according to the seventh aspect, in which a rolling element reaction mechanism using a coil spring is provided at the rear end of the rolling element accommodating space.

[0024] In the lure according to the eighth or ninth embodiment of the present invention, the rolling body is pushed back forward by the restoring force of the coil spring that was compressed when the lure hits the water, so that the lure can quickly transition to a swimming posture. The rolling body reaction mechanism can be realized, for example, by covering a coil spring with a rod-shaped spring guide pin inserted therethrough with a cylindrical piston having an upper plate.

[0025] The lure according to the tenth aspect of the present invention is the lure according to the sixth aspect, and has a first reaction magnet arranged at the rear end of the rolling body storage space and a second reaction magnet arranged on the surface of the magnetic rolling body in the rolling direction, and the polarities of the first reaction magnet and the second reaction magnet are different, and the magnetized body is arranged on the side of the rolling body storage space.

[0026] The lure according to the eleventh aspect of the present invention is the lure according to the seventh aspect, and has a first reaction magnet arranged at the rear end of the rolling body storage space and a second reaction magnet arranged on the surface of the magnetic rolling body in the rolling direction, and the polarities of the first reaction magnet and the second reaction magnet are different, and the magnetized body is arranged on the side of the rolling body storage space.

[0027] In the lure according to the tenth or eleventh aspect of the present invention, the repulsive force of the magnet accelerates the transition from a state in which the rolling body has moved to the rear of the lure to a state in which the rolling body has moved forward. The magnetic rolling element in which the second reaction magnet is arranged in the lure according to the tenth or eleventh embodiment of the present invention can be realized, for example, by making the rearmost rolling element a cylindrical roller and embedding magnets in a plurality of places on its circumferential curved surface. In this case, a roller shaft perpendicular to the direction of rolling is provided on the roller, and at the same time, a horizontal rib serving as a guide rail for guiding the roller shaft is provided on both sides of the rolling element storage space in the area where the roller rolls. In addition, the side surface of the magnetic rolling element on which the second reaction magnet is arranged on the surface in the rolling direction or the roller shaft is magnetically attracted to a magnetized body arranged on the side surface of the rolling element storage space, in the same manner as a normal magnetic rolling element.

[0028] The lure according to the twelfth embodiment of the present invention is a lure comprising a body having a line eye, a rolling body storage space extending in the front-rear direction in the body, a plurality of rolling bodies movably arranged in the rolling body storage space, and a magnetized body provided on the peripheral wall of the rolling body storage space, wherein one rolling body except for the most distal rolling body of the plurality of rolling bodies is a magnetic rolling body, and the other rolling bodies are non-magnetic rolling bodies, and at least one of the non-magnetic rolling bodies is made of a tungsten alloy consisting of tungsten (W), nickel (Ni), and copper (Cu).

[0029] Conventional rolling elements made of a tungsten alloy consisting of tungsten, nickel, and iron are magnetic rolling elements, but by using a composition of tungsten, nickel, and copper, it is possible to make the rolling elements non-magnetic.

[0030] The lure according to the thirteenth embodiment of the present invention is the lure according to any one of the first to fourth embodiments, and at least one of the non-magnetic rolling bodies is made of a tungsten alloy composed of tungsten, nickel and copper.Tungsten has the highest melting point of all metals at 3380°C, and its specific gravity is also large at 19.3.The non-magnetic tungsten alloy of the present invention is an alloy that is mainly composed of tungsten and has a binder phase composed of nickel and copper.

[0031] The lure according to the 14th embodiment of the present invention is the lure according to the 13th embodiment, and the composition of the tungsten alloy is 60-65% by weight of tungsten, 5-15% by weight of copper, and 25-35% by weight of nickel. Since tungsten has a large specific gravity, the more the weight percentage of tungsten is increased, the smaller the volume of the magnetic rolling body can be, but the higher the cost. A tungsten alloy of 60-65% by weight of tungsten, 5-15% by weight of copper, and 25-35% by weight of nickel can be used as a substitute for lead (specific gravity 9-12). This solves the environmental problems caused by the use of lead.

[0032] The lure according to the fifteenth embodiment of the present invention is the lure according to the thirteenth embodiment, and the composition of the tungsten alloy is 95-97% by weight of tungsten, 1-1.5% by weight of copper, and 2-3.5% by weight of nickel. The non-magnetic rolling body of the lure according to the fifteenth embodiment of the present invention has a large specific gravity of 18-18.4, and can be made smaller in volume than the non-magnetic rolling body of the same weight made of conventional copper or stainless steel, which can contribute to lowering the center of gravity and reducing the size of the lure.

[0033] A lure according to a sixteenth embodiment of the present invention is the lure according to the twelfth embodiment, wherein the composition of the tungsten alloy is 60-65% by weight of tungsten, 5-15% by weight of copper, and 25-35% by weight of nickel.

[0034] A lure according to a seventeenth embodiment of the present invention is the lure according to the twelfth embodiment, wherein the composition of the tungsten alloy is 95-97% by weight of tungsten, 1-1.5% by weight of copper, and 2-3.5% by weight of nickel. Effect of the Invention

[0035] According to the lure of the present invention, the flying posture is stable and the speed of returning from the flying posture to the swimming posture when landing on water is improved. [Brief description of the drawings]

[0036]

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[0037] First, in this specification, directions are defined as follows. "Front" refers to the side the lure moves when it is pulled through the water by the line, "rear" refers to the side opposite to the side the lure moves, "up" refers to the upper side in the vertical direction, and "down" refers to the lower side in the vertical direction. "Horizontal" does not only mean completely horizontal, but also includes a direction perpendicular to the vertical direction and a direction slightly tilted from a direction perpendicular to the vertical direction.

[0038] The disclosure is merely an example, and those who are skilled in the art can easily come up with appropriate modifications that maintain the gist of the invention, and naturally, these modifications are included in the scope of the present invention. In addition, the drawings may be more schematic than the actual embodiment in order to make the explanation clearer, but they are merely an example and do not limit the interpretation of the present invention.

[0039] In each figure, the reference numerals may be omitted for the same or similar elements arranged consecutively. In addition, in this specification and each figure, the same reference numerals may be used for components that perform the same or similar functions as those described above with respect to the previous figures, and duplicate detailed descriptions may be omitted.

[0040] (The flying posture of the lure) The flying posture of the lure will be explained with reference to Figs. Fig. 6 is an explanatory diagram of a log structure. Fig. 7 is a diagram showing the change in the flying posture of a lure whose center of gravity is biased forward. Fig. 8 is a diagram showing the change in the flying posture of a lure whose center of gravity is biased backward. Fig. 9 is a diagram showing the change in the flying posture of a lure that adopts a log structure.

[0041] As shown in Figure 6(a), the log has a length in the direction of the central axis y3, and from the center to the outside, is composed of heartwood 142, sapwood 144, and bark 140, in that order. The heartwood 142 has the highest density, followed by the sapwood 144 and bark 140, in that order. 6(b) is a schematic diagram of the log structure. A cylindrical object having a length in the direction of the central axis y4 is composed of a high density part 146 in the center and a low density part 148 around it. It is known that an object having such a log structure has a stable flying posture in the air.

[0042] Fig. 21 is a diagram for explaining the movement of the center of gravity of a conventional center-of-gravity-moving lure 10f when it is in a swimming posture and a flying posture. Fig. 21(a) shows a state in which the rolling bodies are respectively located near the front ends of the two rolling body storage spaces, and the first center of gravity 106 is located slightly below the front of the lure 10f. Fig. 21(b) shows a state in which the rolling bodies are located at the rear ends of the two rolling body storage spaces, and the second center of gravity 108 is located slightly above the rear of the lure 10f. During casting, the center of gravity of the lure 10f moves from center of gravity 1 to center of gravity 2 as shown in Fig. 21(c). Center of gravity 2 is away from the body parallel axis y5, and center of gravity axis y6 and body parallel axis y5 are not parallel. Lures like this, whose center of gravity is away from the parallel axis of the body when cast, begin to rotate when cast, mainly due to a misalignment between the lure's velocity vector (the direction in which the lure jumps out) and the position of its center of gravity, and they cannot be cast far. In addition, when casting a lure with a center of gravity biased forward as shown in Figure 7 (a lure with a center of gravity biased backward when viewed from the direction of flight), the angle between the parallel axis of the lure's body and its velocity vector during flight (hereinafter referred to as the "angle of attack") becomes too large, causing the lure to rotate easily and making it impossible to fly far. Furthermore, when casting a lure with a center of gravity biased toward the rear as shown in Figure 8 (a lure with a center of gravity biased toward the front when viewed from the direction of flight), the lure will not be able to transition into a gliding state and will stall as soon as it starts to descend from the peak of its flight curve because it does not have a sufficient angle of attack to generate lift from the air, and will not be able to fly far. These phenomena occur because of the influence of weight distribution, in that if there is a bias in the weight distribution of an object of a certain length, the object will be difficult to stop shaking once it begins to swing, and its flying attitude will become unstable. On the other hand, a lure with a log structure, as shown in Figure 9, has an appropriate weight distribution, a stable flight posture, and can be thrown farther.

[0043] (First embodiment) [Lure 10 Structure] The structure of the lure 10 according to the embodiment of the present invention will be described below with reference to Fig. 1 and Fig. 2. Fig. 1 is a diagram showing the internal structure of the lure 10 in a swimming posture and a flying posture. Fig. 2 is a cross-sectional view taken along line AA in Fig. 1(a). Hereinafter, the term "rolling body" includes both non-magnetic rolling bodies and magnetic rolling bodies. In order to explain the internal structure, Figure 1 shows only the left body piece 20L of the body 20 (not shown in the drawing), which is composed of a symmetrical left body piece 20L and a right body piece 20R (not shown in the drawing), and shows the rest as a whole.

[0044] As shown in FIG. 1(a), the lure 10 includes a body 20 (not shown in the drawing) which is composed of a line eye 12, a left body piece 20L and a right body piece 20R (not shown in the drawing), a rolling body storage space 30, non-magnetic rolling bodies 50, 52, 54, 56, 58, a magnetic rolling body 60, and a magnetized body 70. The lure 10 has a bilaterally symmetrical structure. The non-magnetic rolling bodies 50, 52, 54, 56, 58 and the magnetic rolling body 60 are aligned without gaps from the left vertical rib front 42L, and the total length of these rolling bodies is about 35% of the total length of the body 20. The magnetic rolling body 60 is magnetically attached to the magnetized body 70 at the position of the magnetized body 70. The magnetized body 70 is made of a magnet or a magnetic material and can attract the magnetic rolling body 60 by magnetic force.

[0045] The left body piece 20L has a left vertical rib front 42L, a left vertical rib middle 44L, a left vertical rib middle 45L, a left vertical rib middle 46L, a left vertical rib middle 47L, and a left vertical rib rear 48L, which extend in the vertical direction. The left body piece 20L further has a left horizontal rib upper 32L, a left horizontal rib middle 34L, and a left horizontal rib lower 36L, which extend in the front-rear direction. The body 20 has a line eye 12 at the front end, a hook eye 84 at the rear end, and hook eyes 80 and 82 on the lower side. The left body piece 20L and the right body piece 20R engage with mating bosses (concave) not shown in the figure at mating boss pins (convex) 90a, 90b, 90c, 90d, 90e, 90f, and 90g to form the body 20.

[0046] 1(b) shows a configuration in which the non-magnetic rolling elements 50, 52, 54, 56, 58 and the magnetic rolling element 60 are aligned without any gaps from the rear left vertical rib 48L. The magnetic rolling element 60 is far away from the magnetized element 70 and is not influenced by the magnetized element 70.

[0047] Next, the configuration of the rolling body storage space 30 will be described with reference to FIG. 2. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 and seen from the front side. The rolling body storage space 30 is formed in the front-rear direction (in FIG. 2, the direction from the front to the back of the paper) of the lure 10, surrounded by the left lateral rib upper 32L, the left lateral rib middle 34L, and the left lateral rib lower 36L provided on the inside of the left body piece 32L, and the right lateral rib upper 32R, the right lateral rib middle 34R, and the right lateral rib lower 36R provided on the inside of the right body piece 20R. In this rolling body storage space 30, a non-magnetic rolling body 58 (shown in cross section) and a magnetic rolling body 60 are shown. Below, the lure 10 will be described in detail for each component.

[0048] [Rolling elements] The rolling elements (non-magnetic rolling elements and magnetic rolling elements) are housed in the rolling element housing space 30 so as to be movable in the front-rear direction. The rolling elements can move from the front to the rear of the rolling element housing space 30, and from the rear to the front. When the rolling elements move to the front of the rolling element housing space 30, they come into contact with the front vertical rib 42 (not shown), and when they move to the rear, they come into contact with the rear vertical rib 48 (not shown). The shape of the rolling elements may be any shape that allows them to move within the rolling element housing space 30, and may be, for example, cylindrical or barrel-shaped in addition to the spherical shape shown in the figure.

[0049] The magnetic rolling element 60 is made of a magnetic material. A magnetic material refers to a material that has the property of being magnetized when a magnet is brought close to it, and representative examples include iron, nickel, cobalt, and tungsten alloys containing iron. The non-magnetic rolling elements 50, 52, 54, 56, and 58 are made of a non-magnetic material. Examples of non-magnetic materials include lead, copper, austenitic stainless steel, and non-magnetic tungsten alloys (composed of tungsten, nickel, and copper). When a non-magnetic tungsten alloy (composed of tungsten, nickel, and copper) is used as the non-magnetic rolling element, it is possible to make the non-magnetic rolling element smaller than when other non-magnetic materials are used. In addition, when the rolling elements are spherical, cylindrical, or barrel-shaped, the diameter of the rolling elements is not particularly limited, but is generally about 2 mm to 15 mm. The rolling elements may all be the same size, or may be different sizes. The rolling elements in the first embodiment are, for example, stainless steel balls and steel balls having a diameter of 9 mm.

[0050] [Magnetized body] The magnetized body 70 is a member that magnetically attracts the magnetic rolling body 60 by magnetic force and holds the magnetic rolling body 60 at the position of the magnetized body 70. The magnetized body is made of a magnet. There are no particular limitations on the shape, and a thick rectangular plate, a thick circular plate, or the like is used. As the magnet, for example, a ferrite magnet, an alnico magnet, a neodymium magnet, or a samarium cobalt magnet is used. When the rolling elements are spherical as in this embodiment, the magnetized elements 70 provided on the left and right sides of the transfer element accommodating space 30 are also formed into thick cylindrical shapes, but in this case, since the cross section of the rolling element accommodating space 30 is circular, a circular step is generated around the installation portion of the magnetized elements 70. In order to prevent the rolling elements from getting stuck in this circular step, it is preferable to set the outer diameter of the magnetized elements 70 to half or less of the diameter of the rolling elements. The magnetized body 70 in the first embodiment is, for example, a cylindrical neodymium magnet having a diameter of 4 mm, a thickness of 2 mm, a weight of 0.19 g, and an attractive force of 0.38 kgf.

[0051] [body] The body 20 in FIG. 1 has an external shape that resembles a small fish. However, the shape of the body 20 is not limited to a shape that resembles a small fish, and various shapes are adopted depending on the application. The specific gravity of the lure 10 is usually within the range of 0.70 to 1.35. The body 20 is formed from a non-magnetic material, and is selected from, for example, hard synthetic resins such as ABS resin, and soft synthetic resins such as polyvinyl chloride and elastomer. The inside of the body 20 may be solid or hollow, except for the rolling element accommodating space 30, which is a hollow portion. By providing many hollow portions inside the body 20, it is possible to manufacture a body 20 with a specific gravity of less than 1 even when using a material such as ABS resin, which has a specific gravity of more than 1.

[0052] [Lure 10 Actions] Next, the action of the lure 10 will be described with reference to Figs. 3 to 5. Fig. 3 is a diagram for explaining the movement of the center of gravity of the lure 10 in the swimming posture and the flying posture. Fig. 4 is a diagram for explaining the posture transition of the lure 10 from the landing posture. Fig. 5 is a diagram for explaining the posture transition of the lure 10 in the swimming posture.

[0053] Figure 3(c) shows a state in which all the rolling elements are aligned without gaps from the front end of the rolling element storage space 30, and Figure 3(d) shows a state in which all the rolling elements are aligned without gaps from the rear end of the rolling element storage space 30. As shown in Figures 3(c) and (d), the first center of gravity 100 of the lure when the rolling bodies 50, 52, 54, 56, and 58 in front of the magnetic rolling body 60 are aligned without gaps from the front of the vertical rib 42 (in the figure, the front of the left vertical rib 42L) which is the foremost end of the rolling body storage space 30, and the second center of gravity 102 of the lure when the rolling bodies 52, 54, 56, and 58 and the magnetic rolling body 60 are aligned without gaps from the rear of the vertical rib (in the figure, the rear of the left vertical rib) which is the rearmost end of the rolling body storage space 30, are located within the rolling body storage space 30, and the body parallel axis y1 connecting the volumetric center 110 of the body and the center of the line eye 12 and the center of gravity axis y2 are parallel to each other.

[0054] Fig. 4(a) shows the posture of the lure 10 when it lands on the water, and Fig. 4(b) shows the lure 10 when it becomes horizontal due to the tension of the line after it lands on the water. As shown in Fig. 4(a), except when the rolling body moves due to the impact when it lands on the water, the lure 10 takes a posture in which the center of volume (center of buoyancy) 110 of the body and the second center of gravity 102 are aligned vertically when it lands on the water. Thereafter, when the guide line 14 is pulled, the lure 10 tilts forward and assumes the state shown in FIG. 4(b). In this state, all the rolling elements are still aligned with no gaps from the rear longitudinal rib 48.

[0055] Figure 5 is a diagram for explaining the transition of the swimming posture of the lure 10. Figure 5(c) shows a state in which the lure 10 tilts forward as the line 14 is pulled further from the state shown in Figure 4(b), and all the rolling bodies start to move forward. In this embodiment, the rolling bodies start to roll when the body parallel axis tilts forward by about 2 degrees from the horizontal.

[0056] 5(d) shows a state in which the lure 10 is further tilted forward and all the rolling bodies are aligned without gaps from the front vertical rib 42. At this time, the magnetic rolling bodies 60 are magnetically attached to the magnetized bodies 70.

[0057] 5(e) shows a state in which the tension of the thread 14 is weakened and the lure 10 is tilted backward from the horizontal. In this embodiment, even if the lure 10 is tilted backward from the horizontal, the magnetic rolling body 60 and the magnetized body 70 are set to maintain their magnetic state. It is also possible to set the magnetic force so that the magnetic state between the magnetic rolling body 60 and the magnetized body 70 is released by pulling the thread 14 suddenly.

[0058] 5(f) shows a state where the tension of the line 14 is eliminated and the center of volume (center of buoyancy) 110 of the body and the first center of gravity 100 are vertically aligned. This is the basic posture of the first embodiment. The basic posture changes depending on the setting of the center of volume (center of buoyancy) and the first center of gravity 100 of the lure 10. When the lure 10 is in a horizontal state, if the position of the center of volume (center of buoyancy) 110 is in front of the first center of gravity 100, the lure 10 takes the basic posture inclined toward the water surface from the horizontal, but if the position of the center of volume (center of buoyancy) 110 is behind the first center of gravity 100, the lure 10 takes the basic posture inclined toward the water bottom from the horizontal.

[0059] Thereafter, the lure 10 swims while repeating the states of Figure 5(c) to Figure 5(f). In this behavior description, the influence of the equipment such as the lip, dimple, and fishing hook mounted on the lure 10 and the water (ocean) current is not taken into consideration.

[0060] [Effects of Lure 10] The log structure of the lure 10 allows it to fly farther and achieve a stable flying posture when cast, while also quickly returning to a swimming posture from a flying posture. In addition, all the rolling bodies are aligned and fixed from the front in the swimming posture, so no rattle noise is generated.

[0061] Second embodiment [Lure 10a Structure] Next, a second embodiment of the present invention will be described with reference to the drawings. Fig. 10 is a diagram showing the internal structure of a lure according to a second embodiment of the present invention. Fig. 10(a) shows a state in which the rolling element is in the forward position, and Fig. 10(b) shows a state in which the rolling element is in the rear position.

[0062] The lure 10a differs from the lure 10 in that the magnetic rolling element 70 is located third from the front and that the magnetized element 70 is located rearward of the center of the rolling element accommodating space 30. More specifically, the magnetized body 70 of the lure 10a is located at a position separated from the front vertical rib 42 (42L in the figure) by a distance of about 53% of the total length of the rolling body storage space 30. Furthermore, when all the rolling bodies are aligned from the front end of the rolling body storage space 30 without any gaps, the magnetic rolling bodies 60 are separated from the magnetized body 70 and are not magnetically attached to the magnetized body 70. The magnetized body 70 is located forward of the magnetic rolling bodies 60 when all the rolling bodies are aligned from the rear end of the rolling body storage space 30 without any gaps.

[0063] [Function of Lure 10a] Next, the action of the lure 10a will be described with reference to FIGS. FIG. 11 is a diagram for explaining the transition of a posture from a landing posture of a lure according to a second embodiment of the present invention, and FIG. 12 is a diagram for explaining the transition of a swimming posture of the same lure.

[0064] As shown in Fig. 11(a), except when the rolling bodies move due to the impact of the lure 10a hitting the water, the lure 10a takes a posture in which the center of volume (center of buoyancy) 110 of the body and the second center of gravity 102 are aligned vertically. At this time, no tension is applied to the line 14. When the line 14 is subsequently pulled, the lure 10a tilts forward and moves to the horizontal posture shown in Fig. 11(b). In this state, all the rolling bodies have not yet started to move.

[0065] Next, the transition of the swimming posture of the lure 10a will be described with reference to FIG. Figure 12(c) shows the state where the lure 10a tilts forward and all the rolling bodies start to move forward when the line 14 is pulled further from the state shown in Figure 11(b). In this embodiment, the rolling bodies start to roll when the body parallel axis tilts forward by about 2 degrees from the horizontal.

[0066] In FIG. 12(d), the lure 10a is tilted further forward, the magnetic rolling body 60 is magnetically attached to the magnetized body 70, and then the non-magnetic rolling bodies 54, 56, and 58 are aligned, and the non-magnetic rolling bodies 50 and 52 in front of the magnetic rolling body 60 hit the front vertical rib 42 and are aligned without any gaps.

[0067] 12(e) shows a state in which the tension of the thread 14 is weakened and the lure 10a is tilted backward from the horizontal. In this embodiment, even if the lure 10a is tilted backward from the horizontal, the magnetic rolling body 60 and the magnetized body 70 are set to maintain their magnetic state. At this time, the non-magnetic rolling bodies 50 and 52 hit the magnetic rolling body 60 and stop at that position, and the non-magnetic rolling bodies 54, 56, and 58 hit the vertical rib rear 48 and stop. It is also possible to set the magnetic force so that the magnetic state between the magnetic rolling body 60 and the magnetized body 70 is released by suddenly pulling the thread 14.

[0068] 12(f) shows a state where the tension of the line 14 is removed and the center of volume (center of buoyancy) 110 of the body and the third center of gravity 104 are vertically aligned. This is the basic posture of the second embodiment. The basic posture changes depending on the settings of the center of volume (center of buoyancy) and the third center of gravity 104 of the lure 10a. The closer the position of the third center of gravity 104 is to the center of volume (center of buoyancy) of the lure 10a, the more the basic posture of the lure 10a leans forward.

[0069] After that, the lure 10a usually swims while repeating the states of Figure 12(d) to Figure 12(f). In this behavior description, the influence of the equipment such as the lip, dimple, and fishing hook mounted on the lure 10a and the water (ocean) current is not taken into consideration.

[0070] Third embodiment [Lure 10b Structure] Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 13 is a diagram showing the internal structure of a lure 10b according to a third embodiment of the present invention. The lure 10b is different from the lure 10a in that a fixed weight 94 is provided immediately behind the front vertical rib 42 in the rolling body storage space 30 and a fixed weight 96 is provided immediately in front of the rear vertical rib 48. The fixed weights 94 and 96 are made of metal.

[0071] [Effects of Lure 10b] FIG. 14 is a diagram for explaining the transition of the swimming posture of the lure 10b. As shown in Fig. 14(a), when the lure 10b is inclined forward from the horizontal during swimming, the rolling body moves forward and the non-magnetic rolling body 50 collides with the fixed weight 94, generating a rattle sound. Also, as shown in Fig. 14(b), when the lure 10b is inclined backward from the horizontal, the rolling body moves backward and the non-magnetic rolling body 58 collides with the fixed weight 96, generating a rattle sound. The lure 10b repeats this action thereafter.

[0072] [Effects of Lure 10b] The lure 10b has a fish-attracting effect by producing a rattle sound.

[0073] (Fourth embodiment) [Lure 10c Structure] Next, a fourth embodiment of the present invention will be described with reference to the drawings. Fig. 15 is an internal structure diagram of a lure 10c according to a fourth embodiment of the present invention. The lure 10c differs from the lure 10 in that the magnetized body 74 is provided on the upper surface of the rolling body storage space 30, the magnetized body 74 is provided behind the magnetized body 70 in Fig. 1, the number of non-magnetic rolling bodies is six, and the non-magnetic rolling bodies have different sizes.

[0074] The non-magnetic rolling elements 51, 53, 55, and 57 are spherical and slightly smaller than the non-magnetic rolling elements 56 and 58. The magnetized element 74 is placed on the upper surface of the rolling element accommodating space 30, and therefore needs to be larger and have stronger magnetic force than the magnetized elements 70 placed on the left and right sides of the rolling element accommodating space 30 as in the first embodiment of FIG. If a cylindrical neodymium magnet with a diameter of 4 mm, a thickness of 2 mm, a weight of 0.19 g, and an adhesive force of 0.38 kgf is used for the magnetized body 70 in the first embodiment, a neodymium magnet with a diameter of 7 mm, a thickness of 4 mm, a weight of 1.13 g, and an adhesive force of 1.69 kgf is used for the magnetized body 74 in the fourth embodiment.

[0075] In this way, when the magnetized body 70 is provided on the upper surface of the rolling body storage space 30, the rolling body does not get stuck in the step around the magnetized body 70 as in the case of the magnetized body 70 of the first embodiment, so there is no restriction on the size of the magnetized body 74 relative to the rolling body. The magnetized body 74 is disposed at the rear of the rolling body storage space 30, and the shorter the distance between the magnetized body 74 and the magnetic rolling body 62 in the jumping posture is, the easier it is for the lure to be magnetically attracted to the magnetized body 74, the adhesive force of which increases during the transition to the swimming posture, and the faster the transition to the swimming posture is.

[0076] On the other hand, since it is heavier than the magnetized body 70 of the first embodiment and is installed at a higher position, it is particularly important to install the magnetized body 74 at the rear of the lure 10c in terms of the relationship between the body parallel axis and the center of gravity axis. If the magnetized body 74 is installed in front of the center in the front-rear direction of the rolling body accommodating space 30, it will rotate away from the flight axis during casting, and the flight distance will be extremely short.

[0077] 16 is a diagram for explaining the movement of the center of gravity of the lure 10c according to the fourth embodiment in a swimming posture and a flying posture. The movement of the center of gravity is the same as that in FIG. 3, so a description thereof will be omitted.

[0078] [Effects of Lure 10c] Since the magnetized body 74 of the lure 10c can be made large, the lure can quickly transition from its landing position to its swimming position.

[0079] Fifth embodiment [Lure 10d Structure] From here Next, a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 17 is a diagram showing the internal structure of a lure 10d according to the fifth embodiment of the present invention. 17(a) shows the internal components of the lure 10d with the right body piece 24R (not shown) removed. The main difference from other embodiments is that a rolling element reaction mechanism 120 using a coil spring is provided at the rear end of the rolling element storage space 30.

[0080] FIG. 7(c) is a cross-sectional view of the lure 10d taken along line AA in FIG. 7(b). It shows that a rolling element reaction mechanism 120 using a coil spring is provided at the rear end of the rolling element accommodating space 30, sandwiched between the left body piece 24L and the right body piece 24R.

[0081] Next, the rolling element reaction mechanism 120 using a coil spring will be described in detail with reference to FIG. Figure 18(b) is a cross-sectional view of the lure 10d cut along line BB in Figure 18(a). Figure 18(d) is an enlarged view of the circled portion C in Figure 18(b). Figure 18(c) is a perspective view of the same surface as Figure 10(b) to help understand the structure of the lure 10d.

[0082] 18(d), the rolling element reaction mechanism 120 using a coil spring has a structure in which a cylindrical piston shaft 124 having an upper plate is placed around a coil spring 122 through which a rod-shaped spring guide pin 120 is inserted, and a cylindrical spring bushing 126 having a bottom surface through which a spring guide pin 125 is inserted is placed on the rear end of the coil spring 122. A flange is formed on the rear end of the piston shaft 124, and flanges are also formed on the front and rear ends of the spring bushing 126.

[0083] The piston shaft 124 is supported by the shaft guide rib front 127 (127L in the figure) and the shaft guide rib 128 (128L in the figure). The flange portion at the rear end of the piston shaft 124 is larger in diameter than the receiving portion of the shaft guide rib 128 for receiving the piston shaft 124. Further, the flange portion at the front end of the spring bushing 126 is larger in diameter than the receiving portion of the bushing holder rib 129 for receiving the spring bushing 126 .

[0084] [Effects of Lure 10d] When the lure 10d is cast, the rolling bodies are gathered at the rear. Then, on the gliding path that starts descending from the peak of the flight curve, the rolling bodies are pushed forward before landing on the water by the restoring force (action) of the coil spring 122. This allows the lure 10d to quickly transition to a swimming posture as soon as it hits the water.

[0085] [Effects of Lure 10d] The lure 10d has a shorter transition time from a landing position to a swimming position than the lures of the other embodiments.

[0086] Sixth embodiment [Lure 10e Structure] Next, a sixth embodiment of the present invention will be described with reference to the drawings. FIG. 19 is a diagram showing the internal structure of a lure 10e according to a sixth embodiment of the present invention. Figure 19(a) shows the internal components of the lure 10e with the right body piece 26R (not shown) removed. Figure 19(b) shows the state after the rolling body has moved forward of the lure 10e due to the repulsive force of the magnet, and Figure 19(c) is an enlarged perspective view of the area surrounded by the circle D in Figure 19(b).

[0087] The lure 10e is significantly different from the other embodiments in that a fixed reaction magnet 138 is provided at the rear end of the rolling body storage space 30, and that the rearmost magnetic rolling body 64 is cylindrical in shape and has reaction magnets 134 (134a, 134b, 134c, and 134d in the figure) provided on the surface in the rolling direction.

[0088] The structure of the magnetic rolling elements 64 will be described in more detail with reference to FIG. The magnetic rolling element 64 has a shape similar to that of a roller, and a roller shaft 136 is provided at the center in the direction perpendicular to the rolling direction. Both ends of the roller shaft 136 are inserted into grooves formed by the upper lateral rib 130 for guide rail (130L in the figure) and the lower lateral rib 132 for guide rail (132L in the figure) that are parallel to each other in the body 26, so as to be guided by these ribs.

[0089] FIG. 20 is a more detailed view of the internal structure of the lure 10e according to the sixth embodiment of the present invention. FIG. 20(b) is a cross-sectional view taken along line BB in FIG. 20(a), and FIG. 20(c) is a cross-sectional view taken along line CC in FIG. 20(a). As shown in Fig. 20(b), the roller shaft 136 of the magnetic rolling element 64 is inserted into two grooves formed by the upper left guide rail lateral rib 130L and the lower left guide rail lateral rib and the upper right guide rail lateral rib 130R and the lower right guide rail lateral rib 132L. Four reaction magnets 134 are embedded in the magnetic rolling element 64, and reaction magnets 134b and 134d are visible in this figure. The reaction magnets 134 are neodymium magnets.

[0090] As shown in Fig. 20(c), a fixed reaction magnet 138 is provided at the rear end of the rolling element accommodating space 30. The fixed reaction magnet 138 has the same polarity as the reaction magnet 134. If the reaction magnet 134 has an S pole, the fixed reaction magnet 138 also has an S pole.

[0091] Magnetized bodies 76 are provided on the left and right sides of the rolling element accommodating space 30. A roller shaft 136 of the magnetic rolling element 64 is made of a magnetic material such as iron, and is magnetically attracted to the magnetized bodies 76.

[0092] [Action and effect of Lure 10e] When the lure 10e hits the water, with the rolling bodies gathered at the rear during casting, the rolling bodies are immediately pushed forward by the repulsive force of the fixed reaction magnet 138 and the reaction magnet 134. As a result, the center of gravity of the lure 10e shifts before it becomes horizontal, and it quickly transitions to a swimming posture. Also, like the lure 10, all the rolling elements are aligned and fixed from the front during swimming and do not move, so no rattle noise is produced.

[0093] Seventh embodiment [Lure 10g structure] Next, a seventh embodiment of the present invention will be described with reference to the drawings. FIG. 22 is a diagram showing the internal structure of a lure 10g according to the seventh embodiment of the present invention. Figure 22(a) shows the internal components of the lure 10g when it is swimming with the right body piece 28R (not shown) removed. Figure 22(b) shows the internal components of the lure 10g when it is casting.

[0094] The lure 10g is significantly different from the other embodiments in that a non-magnetic rolling body (tungsten alloy) 59 is used and the total number of rolling bodies is two. The composition of the non-magnetic rolling body (tungsten alloy) 59 is 95% by weight of tungsten (W), 3.5% by weight of nickel (Ni), and 1.5% by weight of copper (Cu). In the case of this composition, the specific gravity is 18, which is more than twice as large as that of the non-magnetic rolling body made of austenitic stainless steel. This is effective when the total length of the lure is short and the moving distance of the rolling body in the rolling body storage space is relatively short.

[0095] In addition, if the composition of the non-magnetic rolling body (tungsten alloy) 59 is in the range of 95 to 97 weight % of tungsten, 1 to 1.5 weight % of copper, and 2 to 3.5 weight % of nickel, the specific gravity is large at 18 to 18.4, and the volume can be made smaller than that of a non-magnetic rolling body of the same weight made of conventional copper or stainless steel, which can contribute to lowering the center of gravity and making the lure smaller. In addition, if the composition of the non-magnetic rolling element (tungsten alloy) 59 is 60 to 65 weight % tungsten, 5 to 15 weight % copper, and 25 to 35 weight % nickel, it can be used as a substitute for lead (specific gravity 9 to 12), which can contribute to solving environmental problems caused by the use of lead. Furthermore, resin tungsten may be used as a tungsten-containing material with a lower specific gravity to replace lead as a non-magnetic rolling element. However, compared to tungsten alloys, there is a possibility that cracks or chips may occur due to repeated collisions.

[0096] Eighth embodiment [Lure 10h Structure] Next, an eighth embodiment of the present invention will be described with reference to the drawings. FIG. 23 is a diagram showing the internal structure of a lure 10h according to an eighth embodiment of the present invention and a diagram showing cut portions. Fig. 23(a) is a diagram showing the internal structure of a lure 10h according to an eighth embodiment of the present invention. Fig. 23(b) is a diagram showing a cut portion of the lure 10h according to the eighth embodiment of the present invention.

[0097] The lure 10h is significantly different from the other embodiments in that all five non-magnetic rolling bodies are made of tungsten alloy. Starting with the non-magnetic rolling body (tungsten alloy) 59a, the non-magnetic rolling bodies (tungsten alloy) 59b, 59c, 59d, and 59e are aligned, and finally the magnetic rolling body 65 is magnetically attached to the magnetized body 78. When many high-density rolling bodies are arranged in this way, it is necessary to increase the magnetic force of the magnetized body. Methods of increasing the magnetic force of the magnetized body include arranging multiple magnetized bodies and using a neodymium magnet with a large magnetic force as the magnetized body.

[0098] However, if the magnetic force of the magnetized body placed inside the lure is increased, not only will the volume and mass of the magnetized body increase, but the magnetic force will leak outside the lure, causing the hook attached to the outside of the lure to be attracted to the lure body, preventing it from performing its original function. In addition, lures may attract each other in the storage box and be damaged, and may have a negative effect on other precision equipment. In particular, if the magnetized body is placed only on the upper part of the lure, the lure will become top-heavy depending on its size and thinness, and its swimming will become unstable. Therefore, the following is an example of the arrangement of magnetized bodies to prevent magnetic force leakage while dealing with an increase in the volume and mass of the magnetized body.

[0099] Figure 24 is an end view showing an example of the arrangement of magnetized bodies at the cut point of the DD line in Figure 23. Four end views (1) to (4) are shown in Figure 24, and "o" and "x" under each view indicate whether the arrangement of the magnetized bodies is appropriate, with "o" being appropriate and "x" being inappropriate. Neodymium magnets are used as magnetized bodies, and for example, neodymium magnet 4 x 2 indicates a cylindrical neodymium magnet with a diameter of 4 mm and a height of 2 mm.

[0100] When a plurality of magnetized bodies are arranged, the condition for arranging the magnetized bodies in order to increase the magnetic attraction force of the magnetic rolling bodies to be magnetized is that "when magnetic poles are arranged facing each other, different poles face each other."

[0101] 24(1) will be described. A neodymium magnet 4×3 (magnetized body) 78c is provided above the rolling element accommodating space 31, a neodymium magnet 4×2 (magnetized body) 78b is provided on the left body piece 28L side of the rolling element accommodating space 31, and no neodymium magnet is provided on the right body piece 28R side of the rolling element accommodating space 31. The side of the neodymium magnet 4×3 (magnetized body) 78c facing the magnetic rolling element 65 is the S pole, and the side of the neodymium magnet 4×2 (magnetized body) 78b facing the magnetic rolling element 65 is the N pole.

[0102] The neodymium magnet 4×2 (magnetized body) 78b on the left body piece 28L side of the rolling body storage space 31 has a cylindrical shape, but is covered with a yoke wall 150 except for the rolling body storage space 31 side. More specifically, the neodymium magnet 4×2 (magnetized body) 78b is surrounded by a spacer ring 150b, and the surface opposite the rolling body storage space 31 is covered with a plate washer 150a. This structure prevents the magnetic force of the neodymium magnet 4×2 (magnetized body) 78b from leaking out of the lure 10h. The yoke wall 150 is made of stainless steel (martensitic), a steel alloy mainly composed of iron, or iron (Fe). The neodymium magnet 4×2 (magnetized body) 78b in FIG. 24(2) and FIG. 24(3) also uses a yoke wall 150, but the description of the yoke wall 150 will be omitted hereafter. Furthermore, regardless of the position of the magnetized body in the rolling element accommodating space 31, not just the left or right as shown in the figure, as long as the periphery of the magnetized body except for the rolling element accommodating space 31 side is covered with the yoke wall 150, it is possible to prevent the magnetic force of the magnetized body from leaking out to the outside.

[0103] 24(2) will be described. Neodymium magnets 4×2 (magnetized body) 78b are provided on both the left body piece 28L side and the right body piece 28R side of the rolling element accommodating space 31, and no neodymium magnets are provided on the upper side of the rolling element accommodating space 31. The side of the neodymium magnet 4×2 (magnetized body) 78b on the left body piece 28L that faces the magnetic rolling element 65 is the N pole, and the side of the neodymium magnet 4×2 (magnetized body) 78b on the right body piece 28R that faces the magnetic rolling element 65 is the S pole.

[0104] 24(3) will be described. Neodymium magnets 4×2 (magnetized body) 78b are provided on the left body piece 28L side and the right body piece 28R side of the rolling element accommodating space 31, and a neodymium magnet 4×3 (magnetized body) 78c is also provided on the upper side of the rolling element accommodating space 31. The magnetic rolling element 65 side of the neodymium magnet 4×2 (magnetized body) 78b on the left body piece 28L side is the N pole, the magnetic rolling element 65 side of the neodymium magnet 4×2 (magnetized body) 78b on the right body piece 28R side is the S pole, and the magnetic rolling element 65 side of the neodymium magnet 4×3 (magnetized body) 78c on the upper side of the rolling element accommodating space 31 is the S pole.

[0105] 24(4) will be described. A neodymium magnet 4×3 (magnetized body) 78c is provided on the upper side of the rolling element accommodating space 31, and a neodymium magnet 4×1 (magnetized body) 78a is provided on the lower side of the rolling element accommodating space 31. No neodymium magnets are provided on the left body piece 28L side and the right body piece 28R side of the rolling element accommodating space 31. The side of the magnetic rolling element 65 of the neodymium magnet 4×3 (magnetized body) 78c on the upper side of the rolling element accommodating space 31 is the S pole, and the side of the magnetic rolling element 65 of the neodymium magnet 4×1 (magnetized body) 78a on the lower side of the rolling element accommodating space 31 is the N pole.

[0106] 24(5) will be described. Neodymium magnets 4×2 (magnetized body) 78b are provided on the left body piece 28L side and the right body piece 28R side of the rolling element accommodating space 31, respectively, and no neodymium magnets are provided on the upper side of the rolling element accommodating space 31. The magnetic rolling element 65 side of the neodymium magnet 4×2 (magnetized body) 78b on the left body piece 28L side is an S pole, and the magnetic rolling element 65 side of the neodymium magnet 4×2 (magnetized body) 78b on the right body piece 28R side is also an S pole. In this case, a magnetic force canceling region is formed inside the magnetic rolling element 65, making it difficult for the magnetic rolling element 65 to be magnetically attracted to the neodymium magnet 4×2 (magnetized body) 78b, and therefore the holding function of the magnetic rolling element 65 is reduced.

[0107] 24(6) will be described. Neodymium magnets 4×2 (magnetized body) 78b are provided on the left body piece 28L side and the right body piece 28R side of the rolling element accommodating space 31, respectively, and no neodymium magnets are provided on the upper side of the rolling element accommodating space 31. The magnetic rolling element 65 side of the neodymium magnet 4×2 (magnetized body) 78b on the left body piece 28L side is the N pole, and the magnetic rolling element 65 side of the neodymium magnet 4×2 (magnetized body) 78b on the right body piece 28R side is also the N pole. In this case, a magnetic force canceling region is formed inside the magnetic rolling element 65, making it difficult for the magnetic rolling element 65 to be magnetically attracted to the neodymium magnet 4×2 (magnetized body) 78b, thereby reducing the holding function of the magnetic rolling element 65.

[0108] The above shows examples of arrangements in which multiple magnetized bodies are arranged, but these are only examples, and other arrangements are possible as long as they comply with the arrangement conditions in paragraph

[0100] . [Explanation of symbols]

[0109] 10. Lures 10a Lure 10b Lure 10c Lure 10d Lure 10e Lure 10f Lure 10g Lure 10h Lure 12 Line Eye 14 Michiito 20. Body 20L Left body piece 20R Right Body Piece 22. Fitting boss pin 24 Body 24L Left body piece 24R Right Body Piece 26 Body 26L Left body piece 26R Right Body Piece 28L Left body piece 28R Right Body Piece 30 Rolling element storage space 31 Rolling element storage space 32L Left side rib top 32R Right side rib top 34L Left side rib 34R Left side rib center 36L Left side rib 36R Right side rib 42 Vertical rib front 42L Left vertical rib front 42R Right vertical rib front 44 Vertical rib 44L Left vertical rib center 44R Right vertical rib center 45L Left vertical rib center 45R Right vertical rib center 46L Left vertical rib center 46R Right vertical rib center 47L Left vertical rib center 47R Right vertical rib center 48 Vertical rib back 48L Left vertical rib back 48R Right vertical rib rear 50 Non-magnetic rolling elements 52 Non-magnetic rolling elements 54 Non-magnetic rolling elements 56 Non-magnetic rolling elements 58 Non-magnetic rolling elements 59 Non-magnetic rolling elements (tungsten alloy) 59a Non-magnetic rolling element (tungsten alloy) 59b Non-magnetic rolling element (tungsten alloy) 59c Non-magnetic rolling element (tungsten alloy) 59d Non-magnetic rolling element (tungsten alloy) 59e Non-magnetic rolling elements (tungsten alloy) 60 Magnetic rolling elements 62 Magnetic rolling elements 64 Magnetic rolling elements 65 Magnetic rolling elements 70 Magnetized body 72 Magnetized body 74 Magnetized body 76 Magnetized body 78 Magnetized body 78a Neodymium magnet 4×1 (magnetized body) 78b Neodymium magnet 4×2 (magnetized body) 78c neodymium magnet 4×3 (magnetized body) 80 Hook Eye 82 Hook Eye 84 Hook Eye 90a Interlocking boss pin (convex) 90b Interlocking boss pin (convex) 90c interlocking boss pin (convex) 90d Interlocking boss pin (convex) 90e Interlocking boss pin (convex) 90f Interlocking boss pin (convex) 90g Fitting boss pin (convex 92 Rib for fixed weight 92L Left fixed weight rib 92R Right fixed weight rib 94 Fixed Weight 96 Fixed Weight 100 First center of gravity 102 Second Center of Gravity 104 Third Center of Gravity 106 First Center of Gravity 108 Second Center of Gravity 110 Center of volume of body (center of buoyancy) 120 Rolling Body Reaction Mechanism Using Coil Springs 122 Coil spring 124 Piston shaft 125 Spring guide pin 126 Spring bushing 127 Shaft guide rib front 127L Left shaft guide rib front 127R Right shaft guide rib front 128 Shaft guide rib rear 128L Left shaft guide rib rear 128R Right shaft guide rib rear 129 Bushing holder rib 129L Left bushing holder rib 129R Right bushing holder rib 130 Guide rail horizontal rib upper 130L Left guide rail horizontal rib top 130R Right guide rail horizontal rib upper 132 Guide rail horizontal rib bottom 132L Left guide rail horizontal rib bottom 132R Right guide rail horizontal rib bottom 134 Recoil Magnet 134a Reaction magnet 134b Recoil magnet 134c recoil magnet 134d Reaction magnet 136 Roller shaft 138 Fixed Reaction Magnet 140 Bark 142 Heartwood 144 Sapwood 146 High density area 148 Low density part 150 York Wall 150a Plate washer 150b spacer ring y1 Body parallel axis y2 Center of gravity axis y3 Center of gravity axis y4 center axis y5 Body parallel axis y6 Center of gravity axis

Claims

1. A body having a line eye; a rolling element accommodating space extending in a front-rear direction within the body, and a plurality of rolling elements movably disposed within the rolling element accommodating space; A lure comprising a magnetized body provided on a peripheral wall of the rolling body storage space, one rolling element other than the most distal rolling element of the plurality of rolling elements is a magnetic rolling element, and the other rolling elements are non-magnetic rolling elements; The total length of the plurality of rolling elements when aligned without gaps is 30 to 80 percent of the total length of the body of the lure.

2. A body having a line eye; a rolling element accommodating space extending in a front-rear direction within the body; and a plurality of rolling elements movably disposed within the rolling element accommodating space; A lure comprising a magnetized body provided on a peripheral wall of the rolling body storage space, one rolling element other than the most distal rolling element of the plurality of rolling elements is a magnetic rolling element, and the other rolling elements are non-magnetic rolling elements; The magnetized body is located at a position spaced apart from the front end of the rolling element accommodating space by a distance of 50% or more of the total length of the rolling element accommodating space. A lure is provided between the rear end of the magnetic rolling body storage space and the position of the magnetic rolling bodies when the plurality of rolling bodies are aligned without any gaps.

3. In a state where the magnetic rolling element is magnetically attached to the magnetized element, the rolling elements in front of the magnetic rolling element are aligned without gaps from the front end of the rolling element accommodating space, Furthermore, when there is a rolling body behind the magnetic rolling body, the center of gravity axis connecting the first center of gravity of the lure when the rolling bodies behind the magnetic rolling body are aligned without gaps with the magnetic rolling body at the front and the second center of gravity of the lure when the multiple rolling bodies are aligned without gaps from the rear end of the rolling body storage space is located within the rolling body storage space, 2. The lure according to claim 1, wherein a body parallel axis connecting the volume center of the body and the center of the line eye is parallel to the center axis of gravity.

4. In a state where the magnetic rolling element is magnetically attached to the magnetized element, the rolling elements in front of the magnetic rolling element are aligned without gaps from the front end of the rolling element accommodating space, Furthermore, when there is a rolling body behind the magnetic rolling body, the center of gravity axis connecting the first center of gravity of the lure when the rolling bodies behind the magnetic rolling body are aligned without gaps with the magnetic rolling body at the front and the second center of gravity of the lure when the multiple rolling bodies are aligned without gaps from the rear end of the rolling body storage space is located within the rolling body storage space, 3. The lure according to claim 2, wherein a body parallel axis connecting the volume center of the body and the center of the line eye is parallel to the center axis of gravity.

5. The lure according to any one of claims 1 to 4, wherein the total number of the plurality of rolling elements is five or more.

6. The lure according to any one of claims 1 to 4, wherein the magnetized body is provided at the position of the rearmost rolling body when the plurality of rolling bodies are aligned without gaps from the front end of the rolling body storage space, and the rearmost rolling body is a magnetic rolling body.

7. The lure according to claim 5, wherein the magnetized body is provided at the position of the rearmost rolling body when the plurality of rolling bodies are aligned without gaps from the front end of the rolling body storage space, and the rearmost rolling body is a magnetic rolling body.

8. 7. The lure according to claim 6, wherein a rolling element reaction mechanism using a coil spring is provided at the rear end of the rolling element accommodating space.

9. 8. The lure according to claim 7, wherein a rolling element reaction mechanism using a coil spring is provided at the rear end of the rolling element accommodating space.

10. The lure according to claim 6, further comprising a first reaction magnet arranged at the rear end of the rolling body storage space and a second reaction magnet arranged on the surface of the magnetic rolling body in the rolling direction, the first reaction magnet and the second reaction magnet having different polarities, and the magnetized body arranged on the side of the rolling body storage space.

11. The lure according to claim 7, which has a first reaction magnet arranged at the rear end of the rolling body storage space and a second reaction magnet arranged on the surface of the magnetic rolling body in the rolling direction, the first reaction magnet and the second reaction magnet having different polarities, and the magnetized body is arranged on the side of the rolling body storage space.

12. A body having a line eye; a rolling element accommodating space extending in the front-rear direction within the body, and a plurality of rolling elements movably disposed within the rolling element accommodating space; A lure having a magnetized body provided on a peripheral wall of the rolling body storage space, one rolling element except for the most distal rolling element of the plurality of rolling elements is a magnetic rolling element, and the other rolling elements are non-magnetic rolling elements; At least one of the non-magnetic rolling elements is made of a tungsten alloy having a composition of tungsten, nickel, and copper.

13. The lure according to any one of claims 1 to 4, wherein at least one of the non-magnetic rolling elements is made of a tungsten alloy composed of tungsten, nickel, and copper.

14. The lure according to claim 13, wherein the composition of the tungsten alloy is 60-65% by weight of tungsten, 5-15% by weight of copper, and 25-35% by weight of nickel.

15. The lure according to claim 13, wherein the composition of the tungsten alloy is 95-97% by weight of tungsten, 1-1.5% by weight of copper, and 2-3.5% by weight of nickel.

16. The lure according to claim 12, wherein the composition of the tungsten alloy is 60-65% by weight of tungsten, 5-15% by weight of copper, and 25-35% by weight of nickel.

17. The lure according to claim 12, wherein the composition of the tungsten alloy is 95-97% by weight of tungsten, 1-1.5% by weight of copper, and 2-3.5% by weight of nickel.

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