Lure

Abstract

To provide a lure in which a rear part can be lowered near a water bottom by only basic component members (such as a body part and a weight part).SOLUTION: A lure 1 comprises: a body part 2 extending in a front-rear direction; and a weight part 3 protruding downward at a front lower part in the body part 2, attached integrally with the body part 2, and made of a material having a higher specific gravity than that of the body part 2. The weight part 3 comprises a first grounding point Lf, and a barycenter provided behind the first grounding point Lf.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a lure, for example, an egi (bait lure) for octopus fishing, which is an artificial bait used when catching octopus. [Background technology]

[0002] Conventionally, squid jigs for octopus fishing (hereinafter simply referred to as "egi") as described in Non-Patent Document 1 have been used. The squid jigs described in Non-Patent Document 1 have a weight part provided at the front lower part of a long and slender body part, and a hook part for hooking an octopus at the rear end of the body part. A fishing line connected to a fishing rod is attached to the front end of the body part.

[0003] It is known that, due to the habits of octopuses, if the hook part of an egi near the seabed is in a raised position, the octopus may hold the weight part below the body, making it impossible to hook the octopus on the hook. From this knowledge, it can be seen that if the rear part (the side with the hook part) of an egi near the seabed is lowered, the octopus will be able to cover the egi including the hook part more easily, and as a result, it will be easier to hook the octopus on the hook part.

[0004] A simple solution to lower the rear of the egi near the seabed is to attach a heavy additional member to the rear of the body. For example, a plate-shaped blade as described in Non-Patent Document 1 or a cap-shaped member located at the base end of the hook part could be attached to the rear of the body. By attaching a heavy member like this, it is easy to achieve a "tail-down" posture in the sea.

[0005] However, there are some undesirable points to this method of using additional parts. First, in terms of functionality, the blade encounters resistance from the seawater as it sinks, slowing down the sinking speed of the egi. In addition, the blade encounters resistance from the seawater, causing the egi to drift in a direction the angler does not intend, increasing the chance of tangling (getting tangled with other anglers' fishing lines). Also, the blade can get tangled with the angler's own fishing line, increasing the chance of tangling. Secondly, in terms of manufacturing the egi, the number of parts increases.To This will increase material costs, as well as assembly costs due to increased lead times and non-compliance with inspection standards. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] Globeride Co., Ltd., "Comfortable Boat Tako Egi SS", Internet, <https: / / www.daiwa.com / jp / fishing / item / terminal_tackle / fune_te / kaiteki_fune_takoegiSS / index.html> Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, an object of the present invention is to provide a lure whose rear portion can be lowered near the bottom of the water using only basic components (such as a body portion and a sinker portion). [Means for solving the problem]

[0008] The present invention is a lure comprising a body portion extending in the fore-and-aft direction, and a weight portion protruding downward from a front lower portion of the body portion, attached integrally to the body portion, and made of a material having a higher specific gravity than the body portion, the weight portion having a first ground contact point and a center of gravity located rearward of the first ground contact point.

[0009] According to this configuration, the center of gravity of the weight portion is located rearward of the first ground contact point, so that the rear of the lure can be caused to land on the bottom.

[0010] The electric scooter may further include a hook portion attached to a rear portion of the body portion, the hook portion having a second ground point.

[0011] With this configuration, the rear part of the lure hits the bottom at the second ground contact point of the hook portion.

[0012] The lure may also be configured to be grounded at two points, the first grounding point and the second grounding point.

[0013] With this configuration, the device touches the ground at two points, making the device stable when it hits the bottom.

[0014] The lure may further include an eye attached to the front of the body portion for connecting a fishing line.

[0015] This configuration allows for easy connection of the fishing line.

[0016] The center of gravity may be located forward of the center of buoyancy of the lure.

[0017] This structure prevents the front part of the lure from floating up in the water. Also, since the rear part of the lure is more likely to float to some extent, the lure can be easily moved by the angler. Also, since the lure is more likely to float, the moment of inertia in the water can be reduced, making it easier to move the lure.

[0018] In addition, the weight portion can be formed so that a rotational moment generated on an axis passing through the first ground contact point and extending in the width direction of the body portion is the difference between a first rotational moment generated in a direction causing the rear portion of the body portion to sink due to gravity and a second rotational moment generated in a direction causing the rear portion of the body portion to float due to buoyancy, and the first rotational moment is greater than the second rotational moment.

[0019] According to this configuration, the weight portion is formed so that the first rotational moment is greater than the second rotational moment, so that the "tail-down" posture can be reliably achieved.

[0020] Further, the first rotation moment and the second rotation moment may have the following relationship: l1mgcosθ1-l2ρVgcosθ2>0 l1mgcosθ1...the first rotational moment, l2ρVgcosθ2...the second rotational moment, l1: length of the line segment connecting the first contact point and the center of gravity of the entire lure, m: mass of the entire lure, g: acceleration of gravity, θ1: angle between the line connecting the first contact point and the center of gravity of the entire squid jig and the bottom of the water, l2: length of the line segment connecting the first contact point and the center of buoyancy of the entire lure, ρ: density of water at the location where the lure is used, V: volume of the entire lure, θ2: angle between the line connecting the first contact point and the center of buoyancy of the entire squid jig and the bottom of the water

[0021] According to this configuration, the "lowered tail" posture can be reliably achieved due to the relationship of the above formula.

[0022] The body portion may have a transparent portion capable of transmitting light therethrough and a cavity provided therein, and may further include a first spring provided in the cavity, and a oscillating portion provided in the cavity so as to be oscillable relative to the body portion and face the transparent portion, and the first spring may have one end connected to the body portion and the other end connected to the oscillating portion.

[0023] According to this configuration, the swinging part that swings within the cavity can attract the attention of the target creature, such as an octopus, to the lure.

[0024] The device may further include a second spring provided within the cavity, the second spring having one end connected to the body portion and the other end connected to the oscillating portion.

[0025] According to this configuration, since the first spring and the second spring are connected to the oscillating portion, the oscillating state can be easily achieved.

[0026] The oscillating portion may have a through hole passing through the oscillating portion in a thickness direction, and the body portion may have a restricting portion inserted into the through hole so as to restrict a oscillating range of the oscillating portion.

[0027] According to this configuration, the swinging state can be appropriately regulated by a combination of the through hole and the regulating portion. Effect of the Invention

[0028] According to the present invention, the center of gravity of the weight is located behind the first grounding point, so that the rear part of the lure can be landed on the bottom. Therefore, the rear part can be lowered near the seabed using only the basic components (e.g., the body and weight). [Brief description of the drawings]

[0029] [Figure 1] 1 is a perspective view of an octopus fishing lure as a lure according to an embodiment of the present invention, viewed from above in front. FIG. [Diagram 2] FIG. 2 is a side view showing a schematic diagram of the state in which the egi has landed on a horizontal water bottom. [Diagram 3] 3 is an enlarged side view of a main part showing the relationship between the front ground contact point, the center of gravity, and the center of buoyancy when the egi is in the position shown in FIG. 2. FIG. [Figure 4] The shape of the weight portion is shown in side view in the upper row and in bottom view in the lower row, where (a) shows the shape of this embodiment, (b) shows modified example 1, and (c) shows modified example 2. [Diagram 5] FIG. 2 is a perspective view showing an example of the internal structure of an egi jig, with the front part of the body portion omitted from the drawing, as seen from above. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Next, the present invention will be described by taking an octopus fishing squid 1 (hereinafter simply referred to as "egi") as one embodiment of a lure. Note that the expressions of front, back, and up and down below are in the state shown in Fig. 2 (bottom-landed state). The left side of the figure is the front, and the right side of the figure is the rear. Note that as shown in Fig. 2, when the egi 1 hits the horizontal bottom B at two points, the front and the back, the 1 / 2 position in the front-back direction is set to the center, and the front and back are determined based on this position.

[0031] The egi 1 of this embodiment is shaped like a fish (small fish) and mainly comprises a body part 2, a weight part 3, and a hook part 4, which are integrated together. The above three parts are the basic components of the egi 1. However, if the hook part 4 is, for example, detachable, the hook part 4 may not be included in the basic components. The egi 1 of this embodiment is basically the same in structure as a conventional one, except for the weight part 3.

[0032] The body part 2 is a part having an elongated shape extending in the front-rear direction from a part corresponding to the head at the front to a part corresponding to the tail at the rear. The body part 2 is formed into a substantially spindle shape with narrowed front and rear ends, and is gently curved in a substantially S-shape in the front-rear direction in a side view. The outer peripheral surface of the body part 2 is a curved surface. The body part 2 can be formed of an opaque material. In addition, when the swinging part 22 and the like are provided in the internal cavity 25 as described below, the body part 2 can be formed of a transparent material. When formed of a transparent material, the entire body part 2 may be transparent, or a light-transmitting part 24 may be formed by making the body part 2 partially transparent. The body part 2 of this embodiment is made of resin except for the built-in parts such as the swinging part 22. However, the body part 2 is not limited to this, and can be formed of, for example, wood or a metal having a smaller specific gravity than the weight part 3 (for example, a light metal such as aluminum).

[0033] A ring-shaped eye 21 is attached to the front end of the body 2 so as to protrude, and a fishing line can be passed through this eye 21. The fishing line is connected to a fishing rod or a spool, and the angler can operate the egi 1 by pulling it via the fishing line.

[0034] A cavity 25 can be formed (having a space) inside the body part 2. As shown in FIG. 5, the oscillating part 22, which is supported by a first spring 221 and a second spring 222 at the front and rear, can be provided in the cavity 25 facing the transmission part 24. The oscillating part 22 can be a thin piece that can reflect light, such as a shiny metal plate. The first spring 221 has one end and the other end, one end (the left end in the figure) is connected to the body part 2, and the other end (the right end in the figure) is connected to the oscillating part 22. The second spring 222 has one end and the other end, one end (the right end in the figure) is connected to the body part 2, and the other end (the left end in the figure) is connected to the oscillating part 22. The second spring 222 can be supported by only the first spring 221 without providing the second spring 222. The oscillating part 22 has a through hole 223 that penetrates in the thickness direction. In this embodiment, the hole is a vertically long oval hole provided at the rear of the swinging part 22. Correspondingly, the body part 2 has a rod-shaped restricting part 26 that protrudes into the cavity 25 and extends horizontally. The restricting part 26 is inserted into the through hole 223 so as to restrict the swing range of the swinging part 22. The swinging of the swinging part 22 is restricted by the restricting part 26 abutting against the periphery of the through hole 223. In addition, in this embodiment, a plurality of balls 23 that can move within the cavity 25 in the body part 2 are provided in front of the swinging part 22. At least the outer periphery of the balls 23 is colored and faces the transparent part 24. By swinging the squid 1 by the angler's operation, the swinging part 22 is swung inside the squid 1, and the balls 23 are moved inside the squid 1, so that the octopus can be attracted to the squid 1. In addition, although not shown, a tuft-shaped object that imitates a fin can be attached to the surface of the body part 2.

[0035] The weight 3 protrudes downward from the front lower part of the body part 2 and is attached to the body part 2 so as to be integrated with the body part 2. A part of the upper part of the weight 3 is embedded in the body part 2, so that the weight 3 is integrated with the body part 2. The weight 3 is inserted into a recess formed in the front lower part of the body part 2 and then fixed with a pin (shown in FIG. 5). The weight 3 may be either non-detachable from the body part 2 or detachable. The weight 3 is made of a material with a higher specific gravity than the body part 2. The material of the weight 3 is not particularly limited as long as it is a substance with a specific gravity that allows the entire egi 1 to sink in seawater, and examples of metal include heavy metals such as lead and tungsten. The weight 3 may also be a composite material of resin and metal or dissimilar metals. When a composite material is used, it is preferable that the entire weight 3 has a uniform density because it is easier to calculate the center of gravity, but the present invention is not limited to this, and the weight 3 may be made of different materials depending on the part (see FIG. 4(c)). The surface may also be covered with a resin layer. Plummet section 3 has a front grounding point Lf as a first grounding point, which will be described later, and a center of gravity provided rearward of front grounding point Lf.

[0036] The weight section 3 of this embodiment has a shape as shown in Fig. 4(a). The shape of the part of the weight section 3 protruding from the body section 2 is a substantially triangular shape with rounded corners in a side view, with the apex portion biased toward the front of the weight section 3. In addition, in a bottom view, the width dimension is smaller at the rear and larger at the front.

[0037] The weight section 3 is provided at one location on the body section 2. In other words, the weight section 3 is the only one provided at the front lower part of the body section 2. The body section 2 of the egi 1 of this embodiment does not have any part for adjusting the front-to-rear weight balance, except for the weight section 3. For this reason, it is advantageous because there is no room for undesirable points associated with the method using the additional member described above. In addition, since no additional member is used, the mass of the egi 1 as a whole can be prevented from increasing. And, by adopting this embodiment, there is no increase in material costs proportional to the mass. Nevertheless, the posture of the egi 1 in water can be led to a desired posture. The reason why the weight section 3 of this embodiment allows the egi 1 to be in a "tail-down" posture will be described later.

[0038] The center of gravity of the weight section 3 is located forward of the center of buoyancy Pf of the entire egi 1. This relationship prevents the head (front) of the egi 1 from floating up in the water. Also, by making the buoyancy act behind the center of gravity of the weight section 3, the rear of the egi 1 tends to float to a certain extent (while still assuming a "tail-down"), making it easier for the angler to move the egi 1. The degree of this movement can be controlled by adding a blade or the like to the rear to generate water resistance. Also, since the easier it floats, the moment of inertia in the water can be reduced, making it easier to move the rear than the eye 21.

[0039] The hook portion 4 is attached to the rear of the body portion 2 so as to extend rearward. The hook portion 4 is provided so that the needle tip is located upward and faces forward when in the bottom-landed position. The hook portion 4 in this embodiment is composed of three needles, but the number of needles can be changed in various ways. The tip of the rod-shaped portion attached below the needle portion of the hook portion 4 is the rear grounding point Lb that touches the seabed when the hook portion 4 touches the seabed when the hook portion 4 touches the seabed. Note that the hook portion 4 may be detachable from the body portion 2, and the body portion 2 may be sold in a state where it is not attached to the hook portion 4.

[0040] The posture of the egi 1 in the water (sea) of this embodiment will be described by showing the state where it has landed on the horizontal water bottom (sea bottom) B. As shown in FIG. 2, the egi 1 hits the water bottom B at two points (two points), one at the front and one at the back. Since it hits the bottom at two points, the state where the egi 1 hits the bottom is stable. When it hits the bottom in this way, the grounding point (shown by a black circle) on the weight part 3 is the front grounding point Lf as the first grounding point, and the grounding point (shown by a black circle) on the body part 2 or the hook part 4 (the hook part 4 in this embodiment) is the rear grounding point Lb as the second grounding point. When the egi 1 sinks, the front grounding point Lf located on the weight part 3 hits the ground first, and then the rear grounding point Lb located on the hook part 4 hits the ground. The weight portion 3 is formed so that, based on the front ground contact point Lf, the downward moment (clockwise moment in Figure 3) as a first rotational moment in which the rear part of the entire egi 1, when it is in the bottom-attached state relative to the front ground contact point Lf, descends due to gravity Fg is greater than the upward moment (counterclockwise moment in Figure 3) as a second rotational moment in which the rear part rises due to buoyancy Ff.

[0041] In other words, the rotational moment generated on the axis passing through the front ground contact point Lf and extending in the width direction of the body part 2 is the difference between the downward moment generated in the direction causing the rear part of the body part 2 to sink due to gravity and the upward moment generated in the direction causing the rear part of the body part 2 to float due to buoyancy, and the weight part 3 is formed so that the downward moment is greater than the upward moment.

[0042] Specifically, the relationship between the underturning moment and the overturning moment is as follows: l1mgcosθ1-l2ρVgcosθ2>0 l1mgcosθ1...downward moment (first rotational moment), l2ρVgcosθ2...upward moment (second rotational moment), l1...length of the line segment connecting the first grounding point Lf and the center of gravity Pg of the entire lure, m...mass of the entire Egi 1, g...acceleration of gravity, θ1...angle of the acute angle formed by the line connecting the front grounding point Lf and the center of gravity Pg of the entire Egi 1 with respect to the seabed B (see Figure 3), l2...length of the line segment connecting the first grounding point Lf and the center of buoyancy Pf of the entire lure, ρ...density of water (seawater) at the place where Egi 1 is used (assumed value is 1.025), V...volume of the entire Egi 1, θ2...angle of the acute angle formed by the line connecting the front grounding point Lf and the center of buoyancy Pf of the entire Egi 1 with respect to the water bottom (see Figure 3)

[0043] The center of gravity Pg and center of buoyancy Pf in the above relationship are the center of gravity Pg and center of buoyancy Pf of the whole egi 1 (all components). However, to simplify the calculation, it is also possible to ignore the mass and volume of some components that do not affect the overall situation, or to calculate the center of gravity and center of buoyancy of each component separately and then evaluate the magnitude of the rotational moment that each component exerts.

[0044] Usually, the specific gravity of the weight 3 is greater than that of the body 2. Also, the buoyancy generated by the body 2 is greater than that generated by the weight 3. Incidentally, the weight 3 has a mass of 23 g, of which the weight 3 has a mass of 35 g. In other words, the weight 3 accounts for the majority (2 / 3 in this embodiment) of the weight 1's mass. In such a normal weight 1, if the center of gravity of the weight 3 itself is behind the front grounding point Lf (more specifically, the perpendicular line passing through the front grounding point Lf) in the bottom-landing state (FIG. 2), the above-mentioned "tail-down" posture can be realized. For this reason, it is possible to omit detailed (strict) design based on the above-mentioned formula and form the weight 1 by designing only the weight 3. In other words, a simple design condition can be set to satisfy the condition that the center of gravity of the weight 3 is behind the front grounding point Lf. In this case, the rear grounding point Lb does not need to be taken into consideration.

[0045] In this case, the case where the egi 1 is set on the horizontal water bottom (ocean bottom) B has been described, but the same applies to a sloping water bottom B. In this case, the rear part of the egi 1 can be prevented from floating up from the water bottom B by using the sloping water bottom B as a reference point.

[0046] As described above, the egi 1 of this embodiment can lower the rear part near the seabed using only the basic components (body part 2, weight part 3, hook part 4 (hook part 4 may not be included)) without using additional parts. Therefore, there are no disadvantages in terms of function and manufacturing, unlike the method using additional parts.

[0047] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the present invention.

[0048] For example, in the above embodiment, the egi 1 for octopus fishing has been described as one embodiment of the lure, but the lure may be used to capture other creatures as long as it is grounded on the bottom of the water. A suitable example of other creatures is aquatic creatures such as flatfish that mainly live near the bottom of the water (sea bottom). For creatures to be captured other than octopus, the lure (egi) 1 can be made to look larger from the target creature above the lure (egi) 1 than when it is not in the "bottom-down" position (such as a substantially vertical position), and it is expected that the target creature will bite the lure (egi) 1. In the above embodiment, the egi 1 is used in the sea, but it can be widely used in water areas where octopuses may live, such as saltwater lakes and brackish lakes. It should be noted that the egi 1 can also be used in freshwater if the target creature is an aquatic creature other than an octopus. The shapes of the body 2, weight 3, and hook 4, which are the basic components of the egi 1, are not limited to those in the above embodiment, and can be changed in various ways as long as they are suitable for catching a target creature such as an octopus. Also, it can be used together with other artificial baits such as worms.

[0049] In the above embodiment, the body portion 2 has a shape similar to that of a conventional body portion. However, by changing the shape of the body portion 2 itself or by combining it with a change in the configuration of the weight portion 3, the positions of the center of gravity Pg and the center of buoyancy Pf of the entire squid lure 1 can be adjusted.

[0050] 4(b) and 4(c) show examples of the weight section 3 other than the embodiment. The weight section 3 shown in FIG. 4(b) as modified example 1 has a width relationship in bottom view that is the opposite to that of the embodiment (FIG. 4(a)). That is, the width dimension is larger at the rear and smaller at the front when viewed from the bottom. In this configuration, the position of the center of gravity Pg of the weight section 3 itself can be easily positioned rearward since the width dimension is larger at the rear. In addition, the weight section 3 shown in FIG. 4(c) as modified example 2 has a configuration in which a rear section 31 in which a material with a relatively high specific gravity is arranged at the rear part of the weight section 3 (part shown by dots) and a front section 32 in which a material with a relatively low specific gravity is arranged at the front part of the weight section 3 are integrated. In this configuration, since the material with a high specific gravity is located at the rear, the position of the center of gravity of the weight section 3 itself can be easily positioned rearward.

[0051] In the above embodiment, the angles θ1 and θ2 of the center of gravity Pg and the center of buoyancy Pf with respect to the seabed B are evaluated as acute angles as shown in Fig. 3, but they may be evaluated as obtuse angles. However, when evaluated as obtuse angles, the positive and negative signs of the downward moment due to gravity and the upward moment due to buoyancy are reversed.

[0052] In addition, in the conventional example, the blade was described as a negative function as a sinker. However, even in the Egi 1 of the present invention, it is possible to provide a blade not for the purpose of adjusting the weight balance between the front and rear, but for the purpose of changing the movement of the Egi 1 while it is descending in the water. [Explanation of symbols]

[0053] 1 Lure, Egi 2. Body 22 Swinging part 221 First Spring 222 Second Spring 223 Through hole 24 Transparent part 25 Cavity 26 Regulatory Department 3 Weight part 4 Hook part B Underwater, ocean floor Ff Buoyancy Fg gravity Lf first grounding point, front grounding point Lb Second grounding point, rear grounding point Pf The center of buoyancy of the entire squid jig Pg Center of gravity of entire squid jig

Claims

1. A body portion extending in the front-rear direction; a weight portion that protrudes downward from a front lower portion of the body portion, is fixedly attached to the body portion, and is made of a material having a higher specific gravity than the body portion; The weight portion of the lure has a first ground contact point and a center of gravity located rearward of the first ground contact point.

2. The hook portion is attached to a rear portion of the body portion. The lure of claim 1 , wherein the hook portion has a second grounding point.

3. The lure according to claim 2, wherein the lure is configured to ground at two points, the first grounding point and the second grounding point.

4. The lure according to any one of claims 1 to 3, further comprising an eye attached to the front of the body portion for connecting a fishing line.

5. The lure according to any one of claims 1 to 4, wherein the center of gravity is located forward of the center of buoyancy of the lure.

6. The lure according to any one of claims 1 to 5, wherein a rotational moment generated on an axis passing through the first ground contact point and extending in the width direction of the body portion is the difference between a first rotational moment generated in a direction that causes the rear portion of the body portion to sink due to gravity and a second rotational moment generated in a direction that causes the rear portion of the body portion to float due to buoyancy, and the weight portion is formed so that the first rotational moment is larger than the second rotational moment.

7. The lure according to claim 6, wherein the first rotational moment and the second rotational moment have the following relationship: l 1 mgcosθ 1 -l 2 ρVgcosθ 2 >0 l 1 mgcosθ 1 …the first rotational moment, l 2 ρVgcosθ 2 ...the second rotation moment, l 1 ... the length of the line segment connecting the first grounding point and the center of gravity of the entire lure, m... the mass of the entire lure, g... the gravitational acceleration, θ 1 ...the angle between the first grounding point and the center of gravity of the entire squid jig and the bottom of the water, l 2 ... the length of the line segment connecting the first grounding point and the center of buoyancy of the entire lure, ρ... the density of water at the location where the lure is used, V... the volume of the entire lure, θ 2 ...The angle between the bottom of the water and the line connecting the first grounding point and the center of buoyancy of the entire squid jig

8. The body portion has a light transmitting portion therein and a cavity provided therein, A first spring disposed within the cavity; a swinging portion provided in the cavity to be swingable with respect to the body portion so as to face the transmission portion, The lure according to any one of claims 1 to 7, wherein the first spring has one end connected to the body portion and the other end connected to the swinging portion.

9. a second spring disposed within the cavity; The lure according to claim 8, wherein the second spring has one end connected to the body portion and the other end connected to the swinging portion.

10. The swinging portion has a through hole penetrating in a thickness direction of the swinging portion, The lure according to claim 8 or 9, wherein the body portion has a restricting portion that is inserted through the through hole so as to restrict a swing range of the swinging portion.

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