Fishing hook

Abstract

To provide a fishhook suitable for improving strength. [Solution] The fishhook (100) comprises a rod-shaped needle shaft (10) made of a steel material such as steel or alloy steel. A sharp needle tip (12) is provided at the tip of the needle shaft (10). Continuing from the needle tip (12), the needle shaft (10) is provided with a curved section (14) that is curved in an arc. A ring-shaped tip section (16) is provided at the end of the needle shaft (10) for securing the fishing line. The curved section (14) has an end face on the inside of the curve and two tapered surfaces that widen from the outside of the curve toward the end face along the axial direction. The tapered surfaces face each other and are arranged symmetrically with respect to the axis of the curved section (14).

Description

[Technical Field]

[0001] The present invention relates to a fishhook, and more particularly to a fishhook suitable for improving its strength. [Background technology]

[0002] BACKGROUND ART Conventionally, a fishhook such as that described in Patent Document 1 has been known. The fishhook described in Patent Document 1 has a tip at the tip of the needle shaft, a base at the base, and a curved section midway leading to the tip. If the direction perpendicular to the plane on which the axis of the needle shaft belongs to the axis line of the needle shaft is defined as the X direction, and the direction perpendicular to the plane on which the axis belongs to the axis line of the needle shaft is defined as the Y direction, the cross section of the needle shaft, excluding at least the tip and base, is configured to be a roughly elliptical shape with the major axis Y in the Y direction and the minor axis X in the X direction as a whole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3120834 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the fishhook described in Patent Document 1, the cross-sectional shape of the needle shaft is elliptical, so when a strong tensile force is applied to the outside of the curve of the curved part, the fishhook bends, and there is a problem that the strength is insufficient.

[0005] Therefore, the present invention has been made in order to address the unresolved problems of the prior art, and aims to provide a fishhook that is suitable for improving its strength. [Means for solving the problem]

[0006] [Invention 1] In order to achieve the above object, the fishhook of Invention 1 comprises a needle tip portion provided at the tip of the needle shaft, and a curved portion provided on the needle shaft continuing from the needle tip portion, and the curved portion has an end face on the inside of the curve and two tapered surfaces along the axial direction that widen from the outside of the curve toward the end face.

[0007] [Idea 2] Furthermore, the fishhook of invention 2 is the fishhook of invention 1, in which the curved portion is formed by pressing from a direction opposite to the surface direction of one of the tapered surfaces and pressing from a direction opposite to the surface direction of the other tapered surface.

[0008] [Invention 3] Furthermore, the fishhook of Invention 3 is the fishhook of Invention 1, in which the angle formed by the tapered surface is 30° to 60°.

[0009] [Invention 4] Furthermore, the fishhook of Invention 4 is the fishhook of Invention 1, in which the joint between one tapered surface and the end surface and the joint between the other tapered surface and the end surface are formed with rounded corners.

[0010] [Invention 5] Furthermore, the fishhook of Invention 5 is the fishhook of Invention 1, in which the tapered surface is a convex arc surface inside the curved portion.

[0011] [Idea 6] On the other hand, in order to achieve the above-mentioned object, the method for manufacturing a fishhook of invention 6 is the same as the method for manufacturing a fishhook of invention 1, in which the curved portion is formed by pressing from a direction opposite to the surface direction of one of the tapered surfaces and pressing from a direction opposite to the surface direction of the other tapered surface. [Effects of the Invention]

[0012] As explained above, the fishing hook of Invention 1 has two tapered surfaces on the curved portion that widen from the outside of the curve toward the end face, so compared to conventional hooks, deformation and breakage are less likely to occur even when a strong tensile force is applied to the outside of the curve of the curved portion. Therefore, strength can be improved.

[0013] Furthermore, with the fishing hook of Invention 2, the curved portion is formed by pressing from a direction opposite the surface direction of one tapered surface and pressing from a direction opposite the surface direction of the other tapered surface, making the structure of the curved portion denser and further improving its strength.

[0014] Furthermore, according to the fishhook of Invention 3, the angle formed by the tapered surface is 30° to 60°, which increases the tensile strength that resists the tensile force acting on the curved portion toward the outside of the curve, further improving the strength.

[0015] Furthermore, according to the fishing hook of Invention 4, the joint between one tapered surface and the end surface and the joint between the other tapered surface and the end surface are formed with rounded corners, which further improves strength.

[0016] On the other hand, according to the fishhook manufacturing method of Invention 6, two tapered surfaces that expand from the outside of the curve toward the end face are provided in the curved portion, so that deformation and breakage are less likely to occur than in conventional methods even when a strong tensile force is applied to the outside of the curve of the curved portion. Therefore, strength can be improved. Furthermore, since the curved portion is formed by pressing from a direction opposite the surface direction of one tapered surface and from a direction opposite the surface direction of the other tapered surface, the structure of the curved portion becomes denser, further improving strength. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view showing the external configuration of a fishhook 100. [Figure 2] 2 is a vertical cross-sectional view of the curved portion 14 taken along the line AA' in FIG. [Figure 3] FIG. 2 is a top view of the needle shaft 10 seen from above. [Figure 4] FIG. 2 is a cross-sectional view of the needle shaft 10 as seen in the axial direction. [Figure 5] FIG. 1 is a perspective view showing the external configuration of a fishhook 100 with a different tip portion. [Figure 6] 1 is a perspective view showing the external configuration of a double-hook fishhook 100. FIG. [Figure 7] 1 is a perspective view showing the external configuration of a triple-hook fishhook 100. FIG. [Figure 8] FIG. 3 is a vertical cross-sectional view of a curved portion 14 corresponding to FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0018] A first embodiment of the present invention will be described below, with Figures 1 to 4 showing this embodiment.

[0019] First, the configuration of this embodiment will be described. FIG. 1 is a perspective view showing the external configuration of a fishhook 100. As shown in FIG.

[0020] FIG. 2 is a vertical cross-sectional view of the curved portion 14 taken along line AA' in FIG. As shown in Figure 1, the fishhook 100 comprises a rod-shaped needle shaft 10 made of a steel material such as steel or alloy steel. A sharp needle tip 12 is provided at the tip of the needle shaft 10. Continuing from the needle tip 12, the needle shaft 10 is provided with a curved portion 14 that is curved in an arc. Hereinafter, the side toward the center of the arc of the curved portion 14 will be referred to as the "inner curve" and the side opposite the center of the arc will be referred to as the "outer curve." The end of the needle shaft 10 is provided with a ring-shaped tip 16 for securing the fishing line.

[0021] As shown in FIG. 2, the curved portion 14 has an end face 20 on the inside of the curve, and two tapered faces 22a, 22b extending from the outside of the curve toward the end face 20 along the axial direction.

[0022] The tapered surfaces 22a and 22b face each other and are provided symmetrically with respect to the axis of the curved portion 14. The tapered surfaces 22a and 22b are flat surfaces. The angle formed by the tapered surfaces 22a and 22b is, for example, 40°. From the viewpoint of suitably ensuring tensile strength, an angle of 30° to 60° is preferable.

[0023] A joint 24a between the tapered surface 22a and the end surface 20, a joint 24b between the tapered surface 22b and the end surface 20, and a joint 24c between the tapered surfaces 22a and 22b are smoothly connected by arcuate surfaces and formed with rounded corners.

[0024] Next, a method for manufacturing the fishhook 100 will be described. FIG. 3 is a top view of the needle shaft 10 seen from above.

[0025] FIG. 4 is a cross-sectional view of the needle shaft 10 as viewed in the axial direction. In the first step, as shown in FIGS. 3 and 4(a), the needle shaft 10 in the shape of a straight rod before processing is placed on a base 30.

[0026] A press jig 32a having a flat press surface is installed diagonally above the right of the base 30. A press jig 32b having a flat press surface is installed diagonally above the left of the base 30. The press jigs 32a and 32b can be moved toward the base 30 by a movement mechanism (not shown), and their press surfaces can be simultaneously pressed against the circumferential surface of the needle shaft 10 to press it. In the second step, as shown in FIGS. 4(a) and 4(b), the curved portion 14 is formed in the needle shaft 10 by pressing with the press jigs 32a and 32b. The needle shaft 10 is fixed to the base 30 and pressed from two directions simultaneously, so that the tapered surface 22a is formed by the press jig 32a, the tapered surface 22b is formed by the press jig 32b, and the end face 20 is formed by the base 30, as shown in FIG. 4(c). Hot pressing or cold pressing can be used as the pressing method.

[0027] Next, the operation of this embodiment will be described. Once the fishing line is secured to the tip 16, the fishhook 100 can be used in the same manner as a regular fishhook. After the tip 12 is caught in the fish's mouth, the fishhook 100 is pulled up through the fishing line, and a strong tensile force is generated on the curved portion 14 due to the weight of the fish. At this time, because the curved portion 14 has the shape shown in FIG. 2, the outer surface of the curved portion 14 can generate a tensile force on the inner wall, making the curved portion 14 less likely to deform or break. Compared to the fishhook of Patent Document 1, when the curved portion 14 has the same cross-sectional area, the fishhook 100 has a wider end face 20, which can generate a larger tensile force on the end face 20 side, making it less likely to deform or break even when a strong tensile force is applied.

[0028] Next, the effects of this embodiment will be described. In this embodiment, the curved portion 14 has an end face 20 on the inside of the curve, and two tapered faces 22a, 22b extending from the outside of the curve toward the end face 20 along the axial direction.

[0029] This makes it less likely to deform or break even when a strong tensile force is applied to the outside of the curve of the curved portion 14, compared to conventional products. This improves strength. Also, since fishing line can be used by simply fastening it to the tip portion 16, there are fewer restrictions and it can be used with a wide range of standards.

[0030] Furthermore, in this embodiment, the curved portion 14 is formed by pressing from a direction opposite to the surface direction of the tapered surface 22a and from a direction opposite to the surface direction of the tapered surface 22b.

[0031] This makes the structure of the curved portion 14 denser, and the strength can be further improved.

[0032] Furthermore, in this embodiment, the angle formed by the tapered surfaces 22a and 22b is 30° to 60°.

[0033] This increases the tensile strength and further improves the strength. Furthermore, in this embodiment, the joint between the tapered surface 22a and the end surface 20 and the joint between the tapered surface 22b and the end surface 20 are formed with rounded corners.

[0034] This can further improve the strength. Furthermore, in this embodiment, the tapered surfaces 22a and 22b are provided symmetrically with respect to the axis of the curved portion .

[0035] This makes the strength of the curved portion 14 uniform, making it less likely that deformation or breakage will occur due to uneven strength. [Modification] In the above embodiment, the tip portion 16 is provided in a ring shape, but this is not limiting, and the tip portion 16a may be provided in a rectangular shape as shown in Fig. 5. Furthermore, the tip portion 16a may be provided in a triangular shape, a polygonal shape with five or more sides, or any other shape.

[0036] FIG. 5 is a perspective view showing the external configuration of a fishhook 100 having a different tip portion. Furthermore, in the above embodiment and its variations, the present invention is applied to a single hook fishhook having one curved portion 14 and a tip portion 12 at the base portion 16, but is not limited to this and can also be applied to a double hook fishhook or a triple hook fishhook as shown in Figures 6 and 7.

[0037] FIG. 6 is a perspective view showing the external configuration of a double-hook fishhook 100. As shown in FIG. As shown in Figure 6, the fishhook 100 has two curved portions 14a, 14b that branch off from the lower part of the needle shaft 10, which continues from the tip 16. The tip 12a is provided at the tip of the curved portion 14a, and the tip 12b is provided at the tip of the curved portion 14b. The curved portions 14a, 14b have the shapes shown in Figure 2.

[0038] FIG. 7 is a perspective view showing the external configuration of a triple-hook fishhook 100. As shown in FIG. As shown in Figure 7, the fishhook 100 has three curved portions 14c, 14d, and 14e that branch off from the lower part of the needle shaft 10, which continues from the tip 16. The tip 12c is provided at the tip of the curved portion 14c, the tip 12d is provided at the tip of the curved portion 14d, and the tip 12e is provided at the tip of the curved portion 14e. The curved portions 14c, 14d, and 14e have the shapes shown in Figure 2.

[0039] Alternatively, a configuration having a greater number of curved portions 14 and needle tip portions 12 may be employed.

[0040] In the above embodiment and its modifications, the tapered surfaces 22a and 22b are flat surfaces, but they are not limited to this and may be arcuate surfaces that are convex inside the curved portion 14, as shown in FIG.

[0041] FIG. 8 is a vertical cross-sectional view of the curved portion 14 corresponding to FIG. 8, the curved portion 14 has an end face 20 on the inside of the curve, and two tapered surfaces 22c, 22d along the axial direction that widen from the outside of the curve toward the end face 20. The tapered surfaces 22c, 22d face each other and are provided symmetrically with respect to the axis of the curved portion 14. The tapered surfaces 22c, 22d form arcuate surfaces that convex toward the inside of the curved portion 14.

[0042] In addition, any shape other than a flat surface or a circular arc surface can be adopted for the tapered surfaces 22a and 22b, as long as it widens from the outside of the curve toward the end surface 20.

[0043] In the above embodiment and its modified examples, the needle tip 12, the curved portion 14, and the base 16 are configured as an integrated needle shaft 10, but this is not limiting, and any of the needle tip 12, the curved portion 14, and the base 16 may be configured separately. Any other structure may be adopted.

[0044] Furthermore, in the above embodiment and its modifications, hot pressing or cold pressing is used as the pressing method, but the method of manufacturing the fishhook 100 is not limited to this, and casting or other manufacturing methods can also be used.

[0045] Furthermore, the above-described embodiments and their modifications can be applied to each other. Furthermore, the present invention is not limited to the above-described embodiment and its modifications, and can be applied to other cases without departing from the spirit of the present invention. All other examples that can be easily conceived by a person skilled in the art are included in the scope of the present invention. [Explanation of symbols]

[0046] 100...fishhook, 10...needle shaft body, 12, 12a to 12e...needle tip portion, 14, 14a to 14e...curved portion, 16, 16a...tip portion, 20...end surface, 22a to 22d...tapered surface, 24a to 24c...joint portion, 30...base, 32a, 32b...press jig

Claims

1. a needle tip portion provided at the tip of a needle shaft body, and a curved portion provided on the needle shaft body continuing from the needle tip portion, The curved portion has a horizontally flat end surface on the inside of the curve and two tapered surfaces extending symmetrically from the outside of the curve toward the end surface along the axial direction, The fishhook is characterized in that the tapered surface is a convex arc surface on the inside of the curved portion.

2. In claim 1, The angle formed by the tapered surface is 30° to 60°, A fishhook characterized in that a joint between one of the tapered surfaces and the end surface and a joint between the other of the tapered surfaces and the end surface are formed with rounded corners.

3. In any one of claims 1 and 2, Two curved portions are provided branching from the lower part of the needle shaft, A fishhook characterized in that each of the curved portions is provided with the needle tip portion.

4. In any one of claims 1 and 2, Three curved portions are provided branching from the lower part of the needle shaft, A fishhook characterized in that each of the curved portions is provided with the needle tip portion.

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