Lure
The lure integrates a keel-like structure with a protruding weight to enhance stability and generate complex swimming motions, addressing the limitations of conventional designs by providing a lower center of gravity and restoring force for stable and varied underwater actions.
Patent Information
- Application Number
- JP2026003086
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Filing Date
- 2026-01-09
- Publication Date
- 2026-08-26
- Estimated Expiration
- 2046-01-09
Smart Images

Figure 0007911451000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a lure used for fishing, and particularly to a fishing lure having a structure provided with a keel portion below the main body portion.
Background Art
[0002] Conventionally, in a fishing lure, it is common to arrange a weight (sinker) inside the lure body, and by adjusting the position and weight of this sinker, the swimming posture, diving depth, and movement of the lure are controlled.
[0003] On the other hand, a technique adopting a configuration in which a sinker protrudes outside the lure body has also been proposed. For example, Patent Document 1 describes a lure that enhances the restoring force from a tilted state of the lure by protruding a sinker from a buoyant lure body and stably generates a large and intense vibration motion.
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0005] However, the lure described in Patent Document 1 only has a configuration in which a sinker is simply protruded from the main body, and does not design the sinker to be separated from the main body portion and integrally formed as a keel-like structure.
[0006] Therefore, an object of the present invention is to provide a lure in which a sinker is integrally formed as a keel-like structure while being separated from the main body portion.
Means for Solving the Problems
[0007] To achieve the above objective, the lure of the present invention comprises a main body having a line eye on one side, and a keel portion provided to protrude downward from one side of the main body, and is formed as a whole to have a U-shape or V-shape when viewed from the side. [Effects of the Invention]
[0008] Thus, the lure of the present invention comprises a main body having a line eye on one side, and a keel portion provided to protrude downward from one side of the main body, and is formed as a whole to have a U-shape or V-shape when viewed from the side. With such a configuration, it is possible to provide a lure in which the weight is integrally formed as a keel structure while keeping it separate from the main body. [Brief explanation of the drawing]
[0009] [Figure 1] This is a perspective view of the lure in this embodiment. The line eye and hook eye are omitted. [Figure 2] This is a front view of the lure in this embodiment. The line eye and hook eye are omitted. [Figure 3] This is a side view of the lure in this embodiment. [Figure 4] This is a cross-sectional view showing the internal structure of the lure in this embodiment. [Figure 5] This figure shows the changes in the lure's underwater side view posture and swimming angle when the position of the line eye is changed. [Figure 6] Figures (a) to (c) show the swimming trajectory and left-right swing amplitude of the lure when line eye positions a, b, and c are selected, as viewed from above. [Figure 7] Figures (d) and (e) show the swimming trajectory and slalom-like swimming state of the lure as viewed from above when line eye positions d and e are selected. [Modes for carrying out the invention]
[0010] Embodiments of the present invention will be described below with reference to the drawings. However, the components described in the following embodiments are illustrative and are not intended to limit the technical scope of the present invention to them alone. [Examples]
[0011] (composition) First, the configuration of lure 1 in this embodiment will be described. As shown in Figures 1 to 4, lure 1 in this embodiment is integrally composed of a main body 10 having a line eye 2 on one side, and a keel 20 provided so as to protrude downward from one side of the main body 10. Note that the line eye (2) and hook eye (4) are not shown in Figures 1 to 3 (see Figure 4 for the line eye 2 and hook eye 4).
[0012] The main body 10 is a component that constitutes the main structure of the entire lure 1, and can adopt any external shape, including existing plug shapes such as minnow type, crank type, and pencil type. Furthermore, the material of the main body 10 is not particularly limited and can be synthetic resin material such as ABS or PLA, wood, metal, etc. In addition, the external shape of the main body 10 can be any shape, such as fish type, insect type, abstract shape, etc. It is preferable that the main body 10 has a symmetrical shape in the swimming posture, as shown in the front view of Figure 2.
[0013] As shown in Figure 4, at least one line eye 2, ... for attaching a fishing line is provided along the left and right centerlines at a front position of the main body 10. In this embodiment, five (or more) line eyes (3, 2, 2, 2, 2) are provided on the main body 10 at positions a to e. These multiple line eyes 3, 2, ... are located at different height positions on the front end, top surface, or near the lip portion 50 of the main body 10. More specifically, the line eyes 2 (3) are installed at five locations: position a directly below the lip portion 50, position b directly above the lip portion 50, and positions c, d, and e from the bottom at a front position of the main body 10.
[0014] When fishing, by selecting one line eye 2 for connecting the fishing line, the point of action of the force when the lure 1 is pulled in water changes, and the swimming posture, diving depth, wobbling amount, etc. can be switched (this point will be described later with reference to FIGS. 5 to 7).
[0015] The keel part 20 is provided so as to project downward from one side of the main body part 10, that is, the front side where the line eye 2 (3) is provided. The keel part 20 may be integrally formed with the main body part 10, or may be formed as a separate body and then fixed to the main body part 10.
[0016] The lure 1 including the main body part 10 and the keel part 20 is formed as a whole so as to have a gently bent shape, specifically a U-shaped or V-shaped, as shown in FIG. 3 in side view. By adopting such a shape, it becomes easy to set the center of gravity of the lure 1 at a low position, and the posture stability in water is improved. The angle of the axis of the keel part 20 with respect to the axis of the main body part 10 is not limited, but can be, for example, 70 degrees to 90 degrees.
[0017] A weight 30 is built in near the tip of the keel part 20 away from the main body part 10. The weight 30 is preferably made of a high specific gravity material such as lead, tungsten, steel ball (iron), carbon steel, etc., and is fixedly arranged in the keel part 20. The length of the keel part 20 is not limited, but can be, for example, from half the length of the main body part 10 to the same length as the main body part 10 or longer than the length of the main body part 10.
[0018] The keel part 20 is formed to have a bulging part 21 in which the weight 30 is built in, and a constricted part 22 formed between the main body part 10 and the bulging part 21. By providing the constricted part 22, the concentration and separation of water flow are promoted, and a change in water flow that affects the operation of the lure 1 can be caused. Although the weight 30 is not built in the constricted part 22, it is also possible to build in a small amount of weight to adjust the overall weight and center of gravity. Of course, it is also possible to build in a small amount of weight in the aforementioned main body part 10.
[0019] By providing the keel part 20 in which the weight 30 is arranged at a position separated from the main body part 10 in this way, the same restoring property as that of the keel of a yacht can be obtained. That is, even when the lure 1 is tilted by the water flow, a restoring force that tries to return to the original posture is generated due to the effect of lowering the center of gravity by the keel part 20 and the weight 30.
[0020] As a result, the lure 1 of the present embodiment can stably generate a swimming motion that is not seen in conventional lures, such as slaloming in an S shape while wobbling, while suppressing the excessive increase in the roll motion.
[0021] In addition, due to the presence of the keel part 20, water flow turbulence occurs at a position different from the water flow turbulence including the Karman vortex generated around the main body part 10 (that is, in the vicinity of the keel part 20). Therefore, a plurality of water flow changes interact with each other and have a great influence on the movement of the lure 1.
[0022] One or more lower line eyes 3 may be provided on the keel part 20. When a fishing line is attached to the lower line eye 3, the lure 1 receives a force that pulls it downward, and the swimming layer and operation characteristics change. The bulging part 21 that houses the weight 30 of the keel part 20 has an overall rounded shape and can prevent the generation of a foothold.
[0023] Furthermore, a lip portion 50 can be provided on one side of the main body 10, below (or above) the line eye 2. The lip portion 50 is a lip-shaped (or plate-shaped, tongue-shaped) protruding member used to control the diving depth and swimming posture of the lure 1, and its shape and angle can be arbitrarily set. The line eye 2 can also be provided on this lip portion 50.
[0024] Furthermore, as shown by the dashed line in Figure 4, hook eyes 4, 4 (and hooks) are provided at the other end (rear end) of the main body 10 where the line eye 2 is not provided, and at the tip (lower end) of the keel 20, respectively. This allows for the stable attachment of multiple hooks. Of course, hooks can also be provided at other positions.
[0025] Lure 1 in this embodiment does not require any special rod work and produces a stable action even when retrieved at a constant speed, making it easy for beginners to use. On the other hand, diverse operability can be obtained by selecting line eye 2 or lower line eye 3.
[0026] As described above, this embodiment provides a keel portion 20 and a weight 30 positioned at its tip, thereby realizing a novel structure and swimming characteristics not found in conventional lures. The specific swimming behavior will be described below.
[0027] (action) Next, the operation of Lure 1 in this embodiment—that is, its swimming posture in water, etc.—will be explained with reference to Figures 5, 6, and 7.
[0028] First, Figure 5 shows the change in the swimming posture of the lure 1 in a side view underwater when the position of the line eye 2 is changed. As shown in Figure 5, the angle at which the lure 1 is pulled in the water changes depending on which of the multiple line eyes 3, 2, ... provided on the main body 10 is to which the fishing line is attached.
[0029] Specifically, compared to the case where line eye position a is used as the reference, as the line eye position changes to b, c, d, and e, the head of the lure 1 becomes more downward-facing. The fact that the swimming angle can be changed simply by selecting line eyes 3 and 2 is due to the stable control of the posture by the configuration in which the keel section 20 and weight 30 are located below the main body section 10. In other words, as the line eye position is changed from a to e, the position of the lip section 50 in the swimming posture shifts downward. As a result, the angle of the lip section 50 gradually becomes more upright, from an angle close to horizontal to an angle close to vertical.
[0030] Next, Figures 6(a) to 6(c) show the swimming trajectory and wobbling amplitude of the lure 1 in a top view when line eye positions a, b, and c are selected. As shown in Figure 6(a), at line eye position a, the wobbling amplitude (wobbling) in the left-right direction of the rear end side of the main body 10, i.e., the tail, is relatively large, while the wobbling amplitude (wobbling) is kept small on the lower side where the keel 20 and weight 30 are located. As a result, the lure 1 traces a swimming trajectory that is highly linear with respect to the line winding direction.
[0031] On the other hand, as shown in Figures 6(b) and (c), at line eye positions b and c, the wobbling amplitude of the tail gradually decreases, and correspondingly the wobbling amplitude of the head side and around the keel 20 becomes relatively larger. However, in all cases, the electrophoretic trajectory is maintained in a generally linear manner, and a stable electrophoretic state with good operability is obtained.
[0032] Next, Figures 7(d) and 7(e) show the swimming trajectory and amplitude of the lure 1 in a top view when line eye positions d and e are selected. As shown in Figures 7(d) and 7(e), at these line eye positions, the amplitude of the left-right swing (wobbling) is about the same as at position b in the tail section of the main body 10, the head section, and the part of the keel section 20 where the weight 30 is located. On the other hand, the lure 1 draws a so-called slalom-like swimming trajectory, which meanders in a large S-shape with respect to the line winding direction. Furthermore, by changing the winding speed or adding rod operation, irregular changes occur in the swimming trajectory, which can generate movements that are effective in attracting fish. In particular, the S-shaped swimming motion is prominent when winding at low speeds, and transitions to an oscillating motion when winding at high speeds (see Figure 7(e)).
[0033] Thus, in this embodiment, the lure 1, with its keel portion 20 located below the main body portion 10 and the weight 30 positioned near its tip, can stably generate a wobbling motion while suppressing excessive rolling motion. Furthermore, by selecting one of the multiple line eyes 3, 2, ..., it becomes possible to switch between highly straight-line swimming motion, slalom-like swimming motion, and even irregular swimming motion with the same lure structure.
[0034] (Summary of effects) By placing the weight 30 (weight position) on the outside, lower side of the main body, wobbling will occur, but rolling will be reduced. When the rolling motion is reduced, the disruption of the lure's movement is suppressed. Having multiple line eyes (3, 2, etc.) allows for a variety of lure movements. Unlike existing lures, the hook eye 4 is positioned vertically at the tail and weight positions of the lure body. If the length of the lip section 50 is increased, the line will interfere with the lip section 50 at position a of the line eye 3. To solve this, it is necessary to either lower the position a or shorten the length of the lip section 50. To lower the position of a, the keel portion 20 needs to be lengthened. Alternatively, it is preferable to insert the line eye 2 in the middle of the lip portion 50. • If the weight (30g) is too heavy, the movement will become sluggish. • Changing the shape of the main body 10 will also change its movement. • If the shape lacks a lip section of 50, it is suitable for floating. Depending on the shape, it can also be used as a topwater plug (popper, pencil, etc.). The weight of 30 is located on the underside, away from the body, so that even if the lure 1 is turned sideways, it will quickly return to a stable position.
[0035] (effect) Next, the effects of Lure 1 in this embodiment will be listed and explained.
[0036] (1) The lure 1 of this embodiment has a line eye 2 on one side of the main body 10 and a keel portion 20 that protrudes downward from one side of the main body 10, and as a whole, it has a U-shape or V-shape when viewed from the side. This configuration, in which a keel portion 20 extends downward independently from the main body 10, is based on a different concept from the conventional "lure structure in which the weight is placed inside the main body" and cannot be achieved by simply adjusting the weight or changing the shape. As a result, the lure 1 can simultaneously obtain posture stability due to a lower center of gravity and restoring force in the water flow, and can achieve both a stable swimming posture and a novel action that could not be obtained with conventional technology. In this case, it is thought that the effect of turbulence in the water flow including Karman vortices that occur near the keel portion 20 is significant, as is the effect of turbulence in the water flow including Karman vortices that occur near the main body 10.
[0037] (2) In addition, in lure 1, a weight 30 is built into the keel portion 20 near the tip, away from the main body portion 10. With this configuration, the weight 30 does not simply function as a component that adds weight, but rather works together with the keel portion 20 to define the center of gravity and the position where the restoring force is generated. Therefore, unlike conventional structures in which the weight 30 is placed inside the main body portion 10, or configurations in which it only protrudes from the outside of the main body, the effect of autonomously restoring the posture of lure 1 when it is tilted is remarkably evident. Such an effect is difficult to predict from simply changing the weight position and is a unique effect of the present invention.
[0038] (3) Furthermore, in lure 1, the keel portion 20 has a bulge portion 21 that houses the weight 30 and a constricted portion 22 formed between the main body portion 10 and the bulge portion 21. The presence of this constricted portion 22 allows the water flow conditions around the keel portion 20 to be intentionally changed, making it possible to create water flow separation and turbulence without compromising stability. As a result, it is not merely a stabilizing structure, but generates complex actions such as wobbling and S-shaped slalom movements. This is an effect different from the conventional design philosophy in which "improved stability" and "increased action" were in a contradictory relationship, and is not something that could be easily conceived.
[0039] (4) Furthermore, the lure 1 is provided with one or more line eyes 2 on the main body 10. In conventional lures, the position of the line eye is fixed in substantially one place, whereas in the present invention, by providing multiple line eyes 2, the point of application of the fishing line can be changed while maintaining the same keel structure and weight arrangement. As a result, it is possible to switch only the operating characteristics without impairing the basic stability of the lure 1, producing an effect that is qualitatively different from a simple design change of the conventional structure.
[0040] (5) In addition, the lure 1 is provided with one or more lower line eyes 3 on the keel section 20. With this configuration, the pulling force from the fishing line acts directly on the keel section 20, resulting in a different force action than in conventional structures where the pulling force is exerted only by the main body section 10. As a result, the swimming depth and straightness of the lure 1 can be changed while maintaining its posture stability, and such an effect cannot be easily predicted from simple vertical movement of the line eye position.
[0041] (6) Furthermore, in lure 1, a lip portion 50 is provided on one side of the main body portion 10. This lip portion 50, when combined with the stabilization structure of the keel portion 20 and the weight 30, allows for more precise control of the diving depth and swimming posture. Unlike conventional lures with lips, the design philosophy is clearly different in that the lip is positioned based on the keel structure as a means of stabilizing posture.
[0042] (7) In addition, the lure 1 is provided with hook eyes 4 at the rear end of the main body 10 and at the tip of the keel 20. The fact that the swimming posture is not easily disturbed even when the hook eyes 4 are provided at the tip of the keel 20, which has a stabilizing function, is an effect of the structure of the present invention, which could not be easily achieved with conventional lure structures.
[0043] Although embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and any design modifications that do not depart from the spirit of the present invention are included in the present invention.
[0044] For example, the external shape of the main body 10 is not limited to plug shapes such as minnow, crank, or pencil types, but may also be a topwater shape, an abstract shape, or a shape that imitates a fish or insect. Furthermore, the materials used for the main body 10 and the keel 20 can be synthetic resins such as ABS or PLA, wood, metal, or a combination of these materials.
[0045] Furthermore, the length, shape, and curvature of the keel portion 20, as well as the weight, shape, and position of the weight 30 placed within the keel portion 20, can be appropriately changed according to the target swimming layer, target fish species, and operating environment. This makes it possible to maintain the stable attitude control and swimming characteristics unique to the present invention while adjusting the center of gravity and the magnitude of the restoring force.
[0046] Furthermore, the number and position of the line eyes 2 and lower line eyes 3, the presence and shape of the lip portion 50, and the arrangement of the hook eye 4 can also be appropriately modified, as long as the stabilization mechanism provided by the keel portion 20 and weight 30, which is the basic configuration of the present invention, remains in place. These design changes do not impair the technical concept of the present invention, which is a lure equipped with a keel portion 20 below the main body portion 10, and are included in the present invention as variations that can be easily conceived by those skilled in the art. [Explanation of Symbols]
[0047] 1 lure 2 Line Eye 3 Lower line eye 4 hook eyes 10 Main body 20 Keel section 21 Bulge 22 Constricted area 30 weights 50 Lip section
Claims
1. A main body having a line eye on one side, A keel portion is provided so as to protrude downward from one side of the main body, Equipped with, The overall structure is formed to have a U-shape or V-shape when viewed from the side. A weight is built into the tip of the keel portion, away from the main body portion. The lure is formed such that the keel portion has a bulge portion in which the weight is housed and a constricted portion formed between the main body portion and the bulge portion.
2. The lure according to claim 1, wherein the main body has a plurality of line eyes, and the line can be selected from the plurality of line eyes to be attached.
3. A main body having a line eye on one side, A keel portion is provided so as to protrude downward from one side of the main body, Equipped with, The overall structure is formed to have a U-shape or V-shape when viewed from the side. The main body has multiple line eyes, and the line can be changed by selecting from the multiple line eyes. The keel portion further has one or more lower line eyes, and the line can be selected from the multiple line eyes and the lower line eye to be attached to the lure.
4. The lure according to claim 3, further comprising a lip portion on one side of the main body.
5. A lure according to claim 2, wherein a hook eye is provided at the other end of the main body that does not have the line eye, and at the tip of the keel portion.
Citation Information
Patent Citations
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