JP7165332B2 - Fishing lure and center-of-gravity transfer tube - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fishing lure incorporating a center-of-gravity-moving tube and a center-of-gravity-moving tube suitable for being incorporated in a fishing lure.

As a lure used for catching large fish in freshwater areas such as rivers and lakes and sea areas, it has an elongated shape that resembles the shape of a small fish that serves as bait, and has hooks on its abdomen and tail. A fishing lure (hereinafter sometimes simply referred to as "lure") with a is generally used. For example, as a typical fishing operation using a lure in a sea area, casting fishing is known in which a lure attached to the tip of a fishing line is cast into a distant sea area from a beach, a quay, or a ship. Since it is necessary to cast the lure as far as possible in this casting fishing, the lure is often configured with a built-in weight.

A typical series of lure throwing operations in lure casting is shown in Japanese Patent Application Laid-Open No. 2002-200013. FIG. 1 showing the lure throwing operation described in this Patent Document 1 is reprinted as FIG. 1 in this specification.

After the lure as a lure is thrown into the surface of the water such as the sea surface, the head is usually turned slightly downward on the surface of the water or in the water, like a small live fish, according to the operation of the fishing line by the angler. It is desirable to have a structure that allows smooth movement in a posture. For this reason, in recent years, fishing lures with built-in center-of-gravity shifting systems have been developed and are actually on the market.

The above-mentioned Patent Document 1 discloses a lure body having an elongated shape imitating a small fish and having an elongated space inside thereof, and a fishing hook attached to the main body, which is accommodated and fixed in the inner space of the main body. It incorporates a center-of-gravity movement system consisting of a guide shaft that is attached to the guide shaft and a linear bushing that has weights on both ends (this functions as the center of gravity) so that it can move back and forth along the guide shaft. A fishing lure is disclosed.

Therefore, a specific configuration of the fishing lure disclosed in Patent Document 1 will be described below along the description of claim 1 of the scope of the patent.

The fishing lure disclosed in Patent Document 1 is a fishing lure in which a lip that slopes forward and downward is attached near the tip of a lure body having an external shape that imitates a small fish, and the front is attached to the hollow interior of the lure body. A guide shaft is provided from the vicinity of the part to the rear part, and a linear bush (functioning as a center of gravity) equipped with weights at both ends attached to this guide shaft is attached so that it can slide back and forth along the guide shaft. It is A magnet is attached near the front end of the lure body, and after the lure is thrown into the sea, the linear bushing is magnetically held by the magnet.

A drawing showing the structure of a fishing lure is selected from the drawings disclosed in Patent Document 1, and is shown as FIG. 2 in the accompanying drawings of this specification. The configuration and operation of the fishing lure shown in FIG.

FIGS. 2A, 2B, and 2C are side cross-sectional views of the lure body schematically showing the overall configuration and center-of-gravity movement system of the fishing lure disclosed in Patent Document 1, respectively. Among these, (A) shows the position of the center of gravity (state magnetically held by the magnet) before the start of the normal casting operation of the lure 10 shown in FIG. 1 (and during storage), and (B) shows , shows the movement of the center of gravity immediately after the start of the lure casting operation; close to the tail). After the lure is in the state of (C) in FIG. 2, when the angler performs an operation to draw the lure, the center of gravity moves forward and is magnetically held by the magnet provided in the front. , returns to the state of (A).

In FIG. 2, a fishing lure 10 has a hollow lure body (usually manufactured by molding synthetic resin) 11 that imitates the shape of a small fish as a main component. A front end portion (corresponding to the head of a small fish) of this lure body 11 is provided with a line ring, and a fishing line (or line) 13 is tied to this line ring. A plurality of hook hangers are provided from the abdomen near the front end of the lure body 11 to the rear end, and each has a front hook (front fishhook) 18 and a middle hook (intermediate fishhook) via a split ring. 19, a rear hook (rear hook) 20 is provided. A thin plate-like lip (functioning as a submersible plate) 21 is attached to the lower front end portion of the lure body in a state of being slightly inclined downward. A linear bush (center of gravity) 23 having weights at both ends is attached to the hollow interior of the fishing lure 10 so as to be movable in the longitudinal direction.
After the fishing lure 10 having such a structure is thrown into the water, when the angler draws the lure 10 by pulling the fishing line 13, the lip 21 receives the resistance of the water around the lure, resulting in the A center-of-gravity body 23 movably mounted inside the lure moves forward along the guide shaft 22 and contacts the magnet 29 to be fixed at the front position of the lure. Therefore, the lure body 11 performs a natural diving motion in water such as the sea in a forward tilting posture.

FIGS. 3A and 3B are diagrams showing the transition of the above-described behavior in water immediately after the fishing lure 10 is thrown into the water, and the center of gravity 23 at the time of being thrown into the water. is at the rear end of the lure 10 as shown in FIG. Then, it contacts the magnet 29 and is temporarily fixed.

2 and 3, the inner peripheral surface of the linear bushing shown in FIGS. A ball (sphere) that rotates while moving is attached. With such a configuration of the linear bush main body, the linear bush smoothly moves forward along the guide shaft and is magnetically fixed to the magnet 29 according to the tilted state of the luer body 11 .

The fishing lure disclosed in Patent Document 1 is easy to use and can be said to be an excellent fishing lure.

Patent Document 2, as shown in FIGS. 4 and 5 of the accompanying drawings of this specification, has a structure in which the inside is hollow, similar to the fishing lure described in Patent Document 1, but has a A lure 41 having a structure in which a center-of-gravity transfer tube 41 is incorporated in the formed space is disclosed. The center-of-gravity moving tube 41 is composed of a cylindrical tubular body 41a and a columnar center-of-gravity body (weight) 42 housed inside the tubular body. It is designed to move smoothly in the longitudinal direction.

The movable center-of-gravity body 42 shown in FIGS. 4 and 5 is also a linear bush, but this linear bush has a cylindrical shape with a group of balls capable of circulating movement on the outer circumferential surface. Therefore, it can be said that the center-of-gravity moving tube disclosed in Patent Document 2 is composed of a tube body and a center-of-gravity body composed of a cylindrical linear bush movably housed inside the tube body. That is, the columnar center-of-gravity body has a diameter slightly smaller than the diameter of the inner peripheral surface of the tubular body, and its outer peripheral surface accommodates and holds a large number of minute spheres (ball bearings) 43 so as to be able to circulate. A linear bushing in which three or more rows of spherical body circulation grooves 44 each consisting of two mutually connected grooves are arranged parallel to each other.

JP 2016-82907 A WO2018/110424 A1

Both of the lure center-of-gravity moving mechanisms described in Patent Documents 1 and 2 have excellent functions as a center-of-gravity moving mechanism used for fishing lures.

However, according to the study of the present inventors, as can be understood from the drawings published in each patent document, a guide shaft or a center-of-gravity movement tube having a function of supporting the center-of-gravity movement mechanism within the lure body is placed inside the lure body. Since it is fixed at a position that is approximately in the center in the vertical direction in the space (approximately half the height in the internal space), the center of gravity of the lure is relatively high. Therefore, even after the lure is thrown into the water and the center of gravity of the lure is fixed forward by magnetism, the lure will cause unnatural swinging that is different from the natural swimming state of small live fish in the water. It was found that there is a problem that movement (rolling) is likely to occur.

Therefore, as with the center-of-gravity moving mechanisms disclosed in Patent Documents 1 and 2, the object of the present invention is to realize smooth movement of the center of gravity and to keep the lure alive after being thrown into the water. To provide an improved structure of a fishing lure capable of easily exhibiting a movement approximating the natural swimming state of a small fish in water.
Another object of the present invention is to provide a center-of-gravity-moving tube having further improved usefulness as a center-of-gravity-moving tube for constructing a center-of-gravity-moving mechanism for a fishing lure.

In order to solve the above problems, the inventors of the present invention conducted research aimed at improving the center-of-gravity moving mechanism of the fishing lure disclosed in Patent Document 2 and developing a center-of-gravity moving tube. As a result, as a mechanism for moving the center of gravity of the fishing lure that is effective in solving the above problems, the installation position (vertical position or height) of the center-of-gravity moving pipe in the internal space of the fishing lure is lowered. We found the structure of the center-of-gravity transfer tube that made it possible.

The present invention primarily resides in the following fishing lure.
It has an elongated shape imitating a small fish, and includes a lure body having an elongated space inside it and a fish hook attached to the main body. A fishing lure having a center-of-gravity moving pipe that accommodates a rod-shaped center-of-gravity body capable of smooth movement in the vertical direction, wherein
(1) The center-of-gravity-moving tube moves the center-of-gravity body housed therein so that the center axis in the longitudinal direction thereof moves at a position below the center axis in the internal space of the lure body. (2) the center-of-gravity body has a polygonal, semicircular, or multi-dimensional cross section with a flat top surface along the maximum diameter of the cross section; Having a shape that is a compound shape combining a square and a semi-circle, provided that above the flat top surface of the center of gravity, the upper part of the top surface is more than the lower part A fishing lure characterized in that it may be provided with projections of any shape as long as it does not add too much mass.
The front portion (corresponding to the head of a small fish) of the main body of the fishing lure of the present invention has a lip, like the fishing lure described in Patent Document 1 and the fishing lure described in Patent Document 2. Although it may be attached, attachment of this lip is not essential.

Secondly, the present invention resides in a center-of-gravity moving tube having the following structure, which is useful for being incorporated in a fishing lure having a hollow space inside.
A center-of-gravity moving tube equipped with a tubular body and a bar-shaped center-of-gravity body with a symmetrical shape in the width direction, which is inserted inside the tubular body so as to be able to move along the length direction of the tubular body. The center-of-gravity body has a cross section in the width direction of a polygon, a semicircle, or a compound shape that is a combination of a polygon and a semicircle, with a flat top surface along the maximum diameter of the cross section. However, on the flat top surface of the center of gravity, any shape can be used as long as the upper part of the top surface does not have a larger mass than the lower part. A center-of-gravity transfer tube, characterized in that it may be provided with a protrusion.

Preferred embodiments of the center-of-gravity moving tube of the fishing lure of the present invention are as follows.
(1) No protrusion is provided on the flat top surface of the center of gravity.
(2) The cross section of the center of gravity in the width direction has a trapezoidal shape in which the width of the top surface is larger than the width of the bottom surface.
(3) The center-of-gravity body has a cross section of a trapezoidal shape in which the width of the top surface is larger than the width of the bottom surface, and each of the opposite side surfaces and the opposite bottom corners of the trapezoid are interconnected. A sphere circulation groove consisting of two grooves and spheres filled in the sphere circulation groove are provided.

The fishing lure of the present invention has its center of gravity at a relatively low position (a position close to the abdomen of the main body). For this reason, the fishing lure of the present invention tends to behave in a manner close to the natural swimming state exhibited by living small fish in water after being thrown into the water. Therefore, the fishing lure of the present invention has a particularly high value as a fishing lure.
When the center-of-gravity moving tube of the present invention is used for the purpose of incorporating it into a fishing lure, it can be easily mounted at a relatively low position inside the fishing lure. For this reason, a fishing lure equipped with the center-of-gravity moving tube of the present invention behaves in water in a manner similar to the swimming state of a living small fish, and thus has a particularly high value as a fishing lure.

FIG. 10 is a diagram schematically showing the entire process of casting the lure attached to the fishing rod disclosed in Patent Document 1 to the surface of the sea (or the surface of the water). 1 is a diagram schematically showing the overall configuration of a fishing lure and a center-of-gravity moving system disclosed in Patent Document 1. FIG. FIG. 4 is a diagram showing transition of behavior of a fishing lure in the sea (or water) after being thrown into the sea (or water). FIG. 2 is a side cross-sectional view schematically showing the overall configuration of a fishing lure disclosed in Patent Document 2 and a center-of-gravity moving tube. FIG. 5 is a perspective view of a center-of-gravity transfer tube of the fishing lure of FIG. 4; 1 is a side cross-sectional view of a representative example of a fishing lure of the present invention; FIG. FIG. 2 is a cross-sectional view taken along the width direction of the central portion in the length direction of a representative example of the fishing lure of the present invention. FIG. 2 is a perspective view (shown with a side cutaway) showing a representative example of the structure of the center-of-gravity moving tube of the present invention; 9A and 9B are a front view and a side view of a center-of-gravity body housed in the center-of-gravity transfer tube of FIG. 8; FIG. 8 is an explanatory diagram showing the position of the center of gravity of the center of gravity in the cross-sectional view of the center-of-gravity moving tube shown in FIG. 7 ; FIG. 8 is a perspective view showing another example of the structure of the center-of-gravity moving tube of the present invention (shown as a cutaway side view similar to FIG. 8);

The fishing lure and center-of-gravity transfer tube of the present invention will now be described in detail with reference to Figures 6-11 of the accompanying drawings.

The overall construction and internal construction of the fishing lure of the present invention can be understood by referring to FIGS. 6-10.

As can be understood from FIG. 6, the fishing lure of the present invention has an elongated shape imitating a small fish, and has an elongated space 52 inside, like the fishing lure described in Patent Document 2. Including the lure body 11 and the fish hook attached to the body, the rod-shaped center of gravity 42 having a symmetrical shape in the width direction and capable of smooth movement in the length direction is accommodated in the internal space 52 of the body. It is a fishing lure in which a center-of-gravity moving tube 41 is fixed, and is characterized by having the following configuration.
(1) The center-of-gravity-moving tube moves the center-of-gravity body housed therein so that the center axis in the longitudinal direction thereof moves at a position below the center axis in the internal space of the lure body. (2) the center-of-gravity body has a polygonal, semicircular, or multi-dimensional cross section with a flat top surface along the maximum diameter of the cross section; Having a shape that is a compound shape combining a square and a semi-circle, provided that above the flat top surface of the center of gravity, the upper part of the top surface is more than the lower part The protrusions may have any shape as long as they do not add too much mass.

Next, the fishing lure and the center-of-gravity moving pipe of the present invention will be described in detail. The description is intended to explain the body of the fishing lure of the present invention.

As described above, the essential differences between the fishing lure described in Patent Document 2 and the fishing lure of the present invention are the mounting position of the center-of-gravity moving tube in the internal space of the lure body, and the shape and center of gravity of the center-of-gravity moving tube. Due to the difference in body shape, this point will be explained in detail below.

First, in the fishing lure of the present invention, as illustrated in FIGS. The first feature is that it is arranged to move on the lower side of the shaft. Here, the central axis of the center of gravity 42 is the central position in the width direction (horizontal direction) of the shape of the center of gravity, and the intersection of the central position in the height direction (vertical direction) (see FIG. 7). A) passing through and extending in the longitudinal direction of the center of gravity 42 (imaginary straight line).
The center axis of the inner space of the lure body is also the center position in the horizontal direction of the inner space of the lure body (here, the inner space at the part where the vertical width is the largest). The axis that passes through the intersection (B in FIG. 7) at the center of the direction and coincides with a straight line (virtual straight line) extending the internal space of the lure body along the length direction of the body. This characteristic configuration can be clearly understood from FIGS. 6 and 7. FIG. 7 and 8, the center-of-gravity body 42 is normally housed in a long dish-shaped tubular body 41a so as to be able to move smoothly in the longitudinal direction. The upper part of the body 41a is similarly covered with a long lid. The center-of-gravity-moving tube 41 thus constructed is usually fixed in the lure body by center-of-gravity-moving tube fixing means (see FIG. 7) formed so as to protrude inside the lure body.

Next, in the fishing lure of the present invention, as illustrated in FIGS. 7 to 9, the center-of-gravity body has a basic cross-sectional shape in the width direction of which the plane along the maximum diameter of the cross-section is flat. It is also characterized by having a polygonal top surface, a semicircular shape, or a composite shape that is a combination of a polygon and a semicircular shape.

The main body of the fishing lure of the present invention is usually manufactured from a pair of moldings obtained by split molding of a resin material. Then, after attaching the center-of-gravity moving pipe to the inside of the pair of molded bodies, the molded bodies can be manufactured using a method of integrating them by a method such as pasting them together. The center-of-gravity body is desirably made of a metal material such as stainless steel, but it can also be made of a composite material of a metal material and a resin material or a single resin material, if desired.

The centroid shown in FIGS. 7 and 8 has a trapezoidal cross-section in the width direction, which is a typical shape, and the centroid has a polygonal shape in which the width of the top surface is larger than the width of the bottom surface of the trapezoid. is the body. The expression polygon does not exclude polygons with rounded (chamfered) corners, which are common as machine parts. The center-of-gravity body used in the present invention may also have other shapes as long as the cross section in the width direction thereof has a flat top surface along the maximum diameter of the cross section. That is, other polygons (quadrilaterals other than trapezoids, polygons with more than quadrilaterals such as pentagons), semicircles, or complex shapes combining polygons and semicircles. good too.

The cross section in the width direction of the present invention has a shape such that the plane along the maximum diameter of the cross section is a flat top surface, a polygon, a semicircle, or a composite shape that is a combination of a polygon and a semicircle. The center-of-gravity body has the advantage that it can be easily attached to the lower position inside the lure body, which has a shape in which the width narrows at the bottom and bottom side.

The center-of-gravity body accommodated in the center-of-gravity moving tube of the present invention is, as described above, a center-of-gravity body having a polygonal or semicircular shape in which the width of the top surface is larger than the width of the bottom surface. A projection of any shape may be formed on the top, but it is not preferable that the projection portion on the upper side of the top surface has a larger mass than the portion on the lower side of the top surface. That is, it is necessary to secure a low center-of-gravity position of the center-of-gravity body of the center-of-gravity moving pipe of the present invention. For example, when the center-of-gravity body is a round bar with a circular cross section (perfectly circular shape) as indicated by the dashed line in FIG. , it becomes difficult to attach the center-of-gravity transfer tube that houses the center-of-gravity body to the inner space of the lure at a low position.

As shown in Figs. 7 to 9, a large number of spheres (ball bearings) are arranged side by side on the side and bottom of the side (corner) of the center of gravity, allowing them to circulate. It is desirable to form a sphere circulation groove consisting of two grooves arranged parallel to each other and connected to each other for circulatingly containing and holding the spheres to be formed. Each of these sphere circulation grooves has a closed bottom, and the spheres housed in one of the two sphere circulation grooves (bottom side (corner) side) move through the center of gravity movement tube when the center of gravity moves. While contacting with the inner peripheral surface of the tubular body, the spherical body rotates and circulates in the groove, and the spherical body accommodated in the other groove also rotates and circulates.

The center-of-gravity moving pipe mounted in the internal space of the fishing lure of the present invention accommodates the above-mentioned center-of-gravity body in the tubular body so as to move smoothly. The tubular body may be a tubular body having a cross section such as a polygon that is integrated as a whole. It would preferably be a tubular body composed of a containing portion and a lid portion.

FIG. 11 shows another configuration example of the center-of-gravity moving tube of the fishing lure of the present invention. As shown in FIG. 11, the center-of-gravity moving tube 41 can smoothly move the center-of-gravity body 42 accommodated therein in the longitudinal direction, as shown in FIGS. The installation of ball bearings to enable movement is not essential.

10 fishing lure 11 lure body 13 fishing line 22 guide shaft 23 linear bushing 41 center-of-gravity moving tube 41a pipe 42 center-of-gravity body 43 sphere (ball)
44 spherical circulation groove

Claims (2)

A lure body having an elongated shape that imitates a small fish, including a lure body having an elongated space inside it and a fishhook attached to the body, having a shape symmetrical in the width direction in the space inside the body and having a length A fishing lure in which a center-of-gravity moving pipe having a straight pipe shape throughout the length direction is fixed and which accommodates a bar-shaped center-of-gravity body that can be smoothly moved in a direction,
(1) The straight-shaped center-of-gravity-moving tube is arranged such that the center-of-gravity body housed therein moves at a position below the center axis in the interior space of the lure body. , that it is placed in the internal space of the lure body,
(2) The center of gravity has a polygonal, semicircular, or compound shape that is a combination of a polygon and a semicircle, with a cross section in the width direction having a flat top surface along the maximum diameter of the cross section. to have a shape such that
and
(3) The center-of-gravity body has a cross section of a trapezoidal shape in which the width of the top surface is larger than the width of the bottom surface, and each of the opposite side surfaces and the opposite bottom corners of the trapezoid are interconnected. a sphere circulation groove consisting of two grooves and spheres filled in the sphere circulation groove;
A fishing lure characterized by: A longitudinal centerpiece provided with a tubular body and a bar-shaped center of gravity with a symmetrical shape in the width direction that is inserted inside the tubular body so as to be able to move along the longitudinal direction of the tubular body. A center-of-gravity moving pipe having a straight pipe shape as a whole,
(1) The center of gravity has a polygonal, semicircular, or a compound shape combining a polygon and a semicircle, with a cross section in the width direction having a flat top surface along the maximum diameter of the cross section. to have a shape such that
and,
(2) The center-of-gravity body has a trapezoidal shape in cross-section with the width of the top surface being larger than the width of the bottom surface, and each of the opposite side surfaces and each of the opposite bottom corners of the trapezoid are interconnected. a sphere circulation groove consisting of two grooves and spheres filled in the sphere circulation groove;
A center-of-gravity transfer tube characterized by:

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