fishing rod

Abstract

The present invention provides a fishing rod with a complex shape, having a concave outer surface recessed concavely along a metal core, and a convex inner surface protruding convexly inward along the concave outer surface. The present invention is a fishing rod having a rod body, the fishing rod having a first cylindrical portion (1), the first cylindrical portion (1) having a radial undercut portion (13), the radial undercut portion (13) having a first concave outer surface recessed concavely toward a radial inner side, and a first convex inner surface protruding convexly toward the radial inner side along the first concave outer surface, the first cylindrical portion (1) having a first smooth portion (15) at the first concave outer surface, and the first cylindrical portion (1) having a second smooth portion (16) at at least a portion of an outer surface of the first concave outer surface.

Description

Technical Field

[0001] This invention relates to fishing rods. Background Technology

[0002] For fishing rods, there are various requirements in the market, such as balance, condition, ease of grip, ease of loading the reel, cross-sectional shape (elliptical, roughly inverted triangle, roughly inverted pentagon, etc.), abrupt expansion of diameter in the axial direction, and the shape of the enlarged part.

[0003] In response to such requirements, the fishing rod manufacturing method described in Patent Document 1 below involves several times winding a fishing rod forming prepreg with fibers aligned in a certain direction around a metal core of the required shape (having a non-circular bulge). After covering the prepreg portion of the fishing rod forming prepreg embedded in the bulge of the metal core with a heat-shrinkable tube, a binding tape is spirally bound along the entire length of the prepreg portion of the fishing rod forming prepreg in a partially overlapping manner to form the rod along the shape of the metal core. The rod is then subjected to heat curing treatment such as heating and firing. After the heat curing treatment, the binding tape is peeled off and the metal core is extracted, thereby forming a fishing rod with a shape following the shape of the metal core, thus meeting the requirements.

[0004] Furthermore, in the method for manufacturing a fishing rod described in Patent Document 2 below, a method of forming a recess on the outer surface using a silicone rubber sheet or a fluoropolymer sheet is disclosed.

[0005] Patent document 1: Japanese Patent No. 2542352.

[0006] Patent Document 2: Japanese Patent Application Publication No. 2010-252813.

[0007] As described in Patent Document 1, when forming a coiled fishing rod using a prepreg and heat-curing process, the binding tape needs to be applied in a manner that follows the shape of the metal core. Therefore, by providing an enlargement at the metal core as in Patent Document 1, it is possible to form a fishing rod with an enlargement that follows its shape, but it is not possible to form a fishing rod that follows a concave shape.

[0008] Furthermore, patent document 2 Figure 3 or Figure 6 The cross-section of the tubular body shown is in Figure 16 This means that the thickness of the tubular body, such as a fishing rod, can be varied so that the recess 500 is provided only on the outer surface, but it is not possible to provide a convex inner surface that protrudes inward along the recess 500 formed on the outer surface. Summary of the Invention

[0009] The purpose of this invention is to provide a fishing rod with a complex shape, having a concave outer surface recessed along a metal core and a convex inner surface protruding inward along the concave outer surface.

[0010] The fishing rod of the present invention is a fishing rod having a rod body, wherein the rod body has a first cylindrical portion, characterized in that the first cylindrical portion has an undercut portion, which is formed by a concave outer surface that is recessed and a convex inner surface that protrudes convexly along the concave outer surface.

[0011] Furthermore, the fishing rod of the present invention is a fishing rod having a rod body, wherein the rod body has a first cylindrical portion, characterized in that the first cylindrical portion has a radial undercut portion, wherein the radial undercut portion is formed by a first concave outer surface that is concave inward and a first convex inner surface that protrudes inward along the first concave outer surface.

[0012] Preferably, the first cylindrical portion has a first smooth portion on the first concave outer surface.

[0013] Preferably, the first cylindrical portion has a second smooth portion on at least a portion of its outer surface other than the first concave outer surface.

[0014] Preferably, the first cylindrical portion has a first spiral-shaped protrusion on at least a portion of its outer surface, excluding the first concave outer surface.

[0015] Furthermore, the fishing rod of the present invention is a fishing rod having a rod body, wherein the rod body has a first cylindrical portion, characterized in that the first cylindrical portion has an undercut portion in the axial direction, the undercut portion in the axial direction being formed by a second concave outer surface that is recessed in the rod tail side in the axial direction and a second convex inner surface that protrudes in the rod tail side in the axial direction along the second concave outer surface.

[0016] Preferably, the first cylindrical portion has a third smooth portion on the second concave outer surface.

[0017] Preferably, the first cylindrical portion has a fourth smooth portion on at least a portion of its outer surface, in addition to the second concave outer surface.

[0018] Preferably, the first cylindrical portion has a second spiral-shaped protrusion on at least a portion of its outer surface, in addition to the second concave outer surface.

[0019] Furthermore, the fishing rod of the present invention is a fishing rod having a rod body, wherein the rod body has a first cylindrical portion, characterized in that the first cylindrical portion has a radial undercut portion and an axial undercut portion, wherein the radial undercut portion is formed by a first concave outer surface that is concave inward and a first convex inner surface that protrudes radially inward along the first concave outer surface, and the axial undercut portion is formed by a second concave outer surface that is concave inward toward the rod tail side in the axial direction, and a second convex inner surface that protrudes convexly along the rod tail side in the axial direction along the second concave outer surface.

[0020] It also has a second cylindrical portion, which is adjacent to the first cylindrical portion in the axial direction, and has a third spiral protrusion on its outer surface.

[0021] Invention Effects As described above, a fishing rod with a complex shape is obtained, which has a concave outer surface that is recessed along the metal core and a convex inner surface that protrudes inward along the concave outer surface. Attached Figure Description

[0022] Figure 1 This shows the main part of a fishing rod according to one embodiment of the present invention. Figure 1 (a) is the front view. Figure 1 (b) is a sectional view.

[0023] Figure 2 (a) is Figure 1 AA end face diagram, Figure 2 (b) is Figure 1 BB end face diagram, Figure 2 (c) is Figure 1 The cc end face diagram.

[0024] Figure 3 yes Figure 1 Enlarged view of part D.

[0025] Figure 4 Figures (a) to (c) show the manufacturing method of the main parts of the fishing rod.

[0026] Figure 5 Figures (a) to (c) show the manufacturing method of the main parts of the fishing rod.

[0027] Figure 6 This is a cross-sectional view showing the silicon tube used in this manufacturing method.

[0028] Figure 7 yes Figure 4 (c) EE end face view.

[0029] Figure 8 This is a front view showing the main part of a fishing rod according to another embodiment of the present invention.

[0030] Figure 9 The main part of the fishing rod is shown in another embodiment of the present invention. Figure 9 (a) is the front view. Figure 9 (b) is a sectional view.

[0031] Figure 10 Figures (a) to (c) show the manufacturing method of the main parts of the fishing rod.

[0032] Figure 11 Figures (a) to (c) show the manufacturing method of the main parts of the fishing rod.

[0033] Figure 12 This is a cross-sectional view showing the silicon tube used in this manufacturing method.

[0034] Figure 13 Figures (a) and (b) are diagrams illustrating a method for manufacturing the essential parts of a fishing rod according to another embodiment of the present invention.

[0035] Figure 14 This is a cross-sectional view showing the main part of a fishing rod according to another embodiment of the present invention.

[0036] Figure 15 Figures (a) to (c) are diagrams illustrating a method for manufacturing the essential parts of a fishing rod according to another embodiment of the present invention.

[0037] Figure 16 This is a cross-sectional view showing the main parts of a traditional fishing rod. Detailed Implementation

[0038] The following is for reference Figures 1 to 7 A fishing rod according to one embodiment of the present invention will be described. The axial direction of the fishing rod is defined as the front-to-back direction, the tip side as the front side, and the butt side as the rear side. The fishing rod includes a rod body. A fishing line guide (not shown) may or may not be provided on the rod body. The rod body is, for example, made of fiber-reinforced resin. At least a portion of the rod body is hollow and formed from a semi-cured sheet of fiber-reinforced resin. The rod body is composed of one or more cylindrical portions.

[0039] Figure 1 This refers to the first cylindrical section 1. The first cylindrical section 1 is the cylindrical section located at the very rear of the rod body, i.e., the butt end. The first cylindrical section 1 is cylindrical and hollow overall. The first cylindrical section 1 has an outer surface 1a and an inner surface 1b. The first cylindrical section 1 includes, from front to back, a small-diameter section 10, an enlarged-diameter section 11, and a large-diameter section 12 in that order. The small-diameter section 10 is as follows... Figure 2 As shown in (a), it appears circular or cylindrical in cross-section. The large-diameter section 12 is as follows... Figure 2As shown in (c), the cross-section is an inverted triangle, serving as the rear handle for the angler to grip. The enlarged section 11 is as follows... Figure 2 As shown in (b), it has a shape that gradually expands in diameter towards the rear, and gradually transforms from a circle to an inverted triangle when viewed in cross-section.

[0040] The first cylindrical portion 1 has a radially undercut portion 13. A first concave outer surface 13a of the radially undercut portion 13 is provided on the outer surface 1a of the first cylindrical portion 1. The first concave outer surface 13a of the radially undercut portion 13 is recessed radially inward. A first convex inner surface 13b of the radially undercut portion 13 is provided on the inner surface 1b of the first cylindrical portion 1. The first convex inner surface 13b protrudes radially inward along the first concave outer surface 13a. The radially undercut portion 13 is provided in the enlarged diameter portion 11 and the large diameter portion 12.

[0041] A first spiral-shaped protrusion 14, a first smooth portion 15, and a second smooth portion 16 are provided on the outer surface 1a of the first cylindrical portion 1. The first spiral-shaped protrusion 14 is formed by the fastening and binding band 103 (forming band) during the firing of the first cylindrical portion 1, and is a band mark. The first spiral-shaped protrusion 14 is provided on the small-diameter portion 10. It is provided on the front part of the outer surface of the small-diameter portion 10.

[0042] The first smooth portion 15 and the second smooth portion 16 are substantially smooth surfaces without any marks. The first smooth portion 15 and the second smooth portion 16 are provided on at least the front portion (continuous with the expanded diameter portion 11) of the rear portion of the small-diameter portion 10, the expanded diameter portion 11, and the large-diameter portion 12. The first smooth portion 15 is provided on the first concave outer surface 13a of the radially undercut portion 13 of the outer surface 1a of the rear portion of the small-diameter portion 10, the expanded diameter portion 11, and the large-diameter portion 12. The second smooth portion 16 is provided on the entire outer surface 1a of the rear portion of the small-diameter portion 10, the expanded diameter portion 11, and the large-diameter portion 12, excluding the first concave outer surface 13a. That is, the rear portion of the small-diameter portion 10, the expanded diameter portion 11, and the large-diameter portion 12 are composed of the first smooth portion 15 and the second smooth portion 16.

[0043] The first cylindrical portion 1 is manufactured, for example, as described below. Figures 4 to 7 The text outlines the manufacturing process of the first cylindrical section 1. Figure 4 At position 100 of the mandrel shown in (a), as Figure 4 As shown in (b), the semi-cured sheet 101 is wound around the mandrel 100.

[0044] In addition, the spindle 100 has a small diameter metal core portion 110, an enlarged diameter metal core portion 111, and a large diameter metal core portion 112 in sequence from the front to the rear along the shape of the first cylindrical portion 1.

[0045] In addition, such as Figure 7 As shown, at the metal core expansion portion 111 and the metal core large diameter portion 112, a metal core undercut portion 113 is formed with a shape corresponding to the shape of the first convex inner surface 13b of the radial undercut portion 13.

[0046] like Figure 4 (c) and Figure 5 As shown in (a), a silicon tube 102 is embedded radially outward of the prepreg 101. The silicon tube 102 is cylindrical and is formed by molding. Preferably, a first flange 102a and a second flange 102b are formed on the outer peripheral surfaces of the front and rear ends of the silicon tube 102, respectively. A protrusion 121 corresponding to the first concave outer surface 13a of the radially undercut portion 13 is formed on the inner peripheral surface of the silicon tube 102. The silicon tube 102 is assembled from the rear portion of the small diameter portion 10 to the area corresponding to the large diameter portion 12. Figure 5 As shown in (b), a fastening strap 103 is wound around the entire prepreg 101, including the silicon tube 102, which is wound around the mandrel 100. The fastening strap 103 is wound from the front to the back. After heating and firing, as shown... Figure 5 As shown in (c), the prepreg 101 to be heated and fired is removed from the mandrel 100 after the fastening strap 103 is removed, and the silicon tube 102 is also removed. The area on the outer surface of the prepreg 101 where the silicon tube 102 is not assembled is the first spiral-shaped uneven portion 14 formed by the fastening strap 103, and the area where the silicon tube 102 is assembled is the first smooth portion 15 and the second smooth portion 16.

[0047] By winding the fastening strap 103 around the silicon tube 102 in this way, the fastening force of the fastening strap 103 acts on the prepreg 101 through the silicon tube 102. Therefore, even though a metal core undercut 113 is provided at the mandrel 100, a fastening force is applied by means of the protrusion 121 provided on the inner circumferential surface of the silicon tube 102. On the outer circumferential surface of the prepreg 101 after heating and firing, a first concave outer surface 13a is formed along the shape of the protrusion 121 provided on the inner circumferential surface of the silicon tube 102, and a first convex inner surface 13b is formed along the shape of the metal core undercut 113, forming a first cylindrical portion 1 with a radial undercut 13.

[0048] Furthermore, a radial undercut portion 13 is provided in the first cylindrical portion 1, thereby providing a greater circumferential clamping force and improving grip when held. Additionally, the presence of a first smooth portion 15 and a second smooth portion 16 facilitates painting of this portion, resulting in a superior aesthetic appearance and eliminating the need for a polishing process. Moreover, the provision of a first spiral-shaped uneven portion 14 and the first smooth portion 15 and the second smooth portion 16 creates a contrast, resulting in a unique aesthetic appeal.

[0049] In addition, the second cylindrical portion 2 can also be joined to the front or rear side of the first cylindrical portion 1. Figure 8 The structure in which the second cylindrical portion 2 is joined to the front side of the first cylindrical portion 1 is shown as an example. The second cylindrical portion 2 can be bonded and fixed to the first cylindrical portion 1, or it can be configured to be movable relative to the first cylindrical portion 1 in the axial direction, i.e., it can be accommodated in the first cylindrical portion 1. The second cylindrical portion 2 can be circular in cross-section along its entire length, and a third spiral protrusion 40 can be provided on its outer surface.

[0050] For fishing rods with other implementation methods, refer to... Figures 9 to 12 To illustrate. Detailed descriptions of structures identical to those in the above embodiments are omitted. The first cylindrical portion 1 of this embodiment is as follows... Figure 9 As shown, the structure, from the front side, has a small-diameter portion 10, a large-diameter portion 12, and an axially oriented undercut portion 20 in sequence. The cross-sectional shape of the first cylindrical portion 1 is circular throughout its entire length. The axially oriented undercut portion 20 is located at the boundary between the small-diameter portion 10 and the large-diameter portion 12. The large-diameter portion 12 is larger in diameter than the small-diameter portion 10, and is stepped in the axially oriented undercut portion 20. The second concave outer surface 20a of the axially oriented undercut portion 20 is recessed towards the rod tail side in the axial direction. The second convex inner surface 20b of the axially oriented undercut portion 20 protrudes convexly towards the rod tail side in the axial direction along the second concave outer surface 20a.

[0051] A second spiral-shaped protrusion 21, a third smooth portion 22, and a fourth smooth portion 23 are provided on the outer surface 1a of the first cylindrical portion 1. The second spiral-shaped protrusion 21 has the same groove as the first spiral-shaped protrusion 14. The third smooth portion 22 and the fourth smooth portion 23 are smooth surfaces, just like the first smooth portion 15 and the second smooth portion 16.

[0052] The second spiral-shaped protrusion 21 is provided on the small-diameter portion 10 and the large-diameter portion 12, specifically, on the front side of the small-diameter portion 10 and the rear side of the large-diameter portion 12. The third smooth portion 22 is provided on the second concave outer surface 20a of the undercut portion 20 in the axial direction. The fourth smooth portion 23 is provided on the entire area of ​​the outer surface 1a of the small-diameter portion 10 where the second spiral-shaped protrusion 21 is not provided, and is also provided on the entire area of ​​the outer surface 1a of the large-diameter portion 12 where the second spiral-shaped protrusion 21 is not provided. That is, the fourth smooth portion 23 is provided on the rear side of the small-diameter portion 10 and on the front side of the large-diameter portion 12.

[0053] Figures 10 to 12 This section outlines the manufacturing process of the first cylindrical section 1. (For example...) Figure 10 As shown in (a) and (b), the prepreg 101 is wound around the mandrel 100. Figure 10As shown in (a), the spindle 100 has a small diameter metal core portion 110 and a large diameter metal core portion 112 in sequence from the front to the rear along the shape of the first cylindrical portion 1. Between the small diameter metal core portion 110 and the large diameter metal core portion 112, a metal core undercut portion 213 is formed with a shape corresponding to the shape of the first convex inner surface 20b of the undercut portion 20 in the axial direction.

[0054] like Figure 10 (c) and Figure 11 As shown in (a), a silicon tube 102 is embedded radially outside the prepreg 101 wound around the mandrel 100. A protrusion 221 corresponding to the second concave outer surface 20a of the undercut portion 20 in the axial direction is formed on the inner circumferential surface of the silicon tube 102. The silicon tube 102 is assembled from the rear portion of the small diameter portion 10 to the front portion of the large diameter portion 12. Figure 11 As shown in (b), a fastening strap 103 is wound around the silicon tube 102. After heating and firing, as... Figure 11 As shown in (c), the fastening strap 103 is removed, and the prepreg 101 to be heated is removed from the mandrel 100, and the silicon tube 102 is also removed. The area on the outer surface of the prepreg 101 where the silicon tube 102 is not assembled is the second spiral-shaped uneven portion 21, and the area where the silicon tube 102 is assembled is the third smooth portion 22 and the fourth smooth portion 23.

[0055] The fastening strap 103 is wound around the silicon tube 102, thereby applying the fastening force of the fastening strap 103 to the prepreg 101 via the silicon tube 102. Therefore, even with the metal core undercut 213 at the mandrel 100, the protrusion 221 on the inner circumferential surface of the silicon tube 102 applies a fastening force, forming a second concave outer surface 20a along the shape of the protrusion 221 on the inner circumferential surface of the silicon tube 102, and a second convex inner surface 20b along the shape of the metal core undercut 213 on the outer circumferential surface of the prepreg 101 after heating and firing, thus forming a first cylindrical portion 1 with an axial undercut 20. With the axial undercut 20 provided, for example, a hand grip is provided in this portion, restricting the axial movement of the hand and resulting in a large gripping force.

[0056] Alternatively, it can be like Figure 13 As shown in (a), the silicon tube 102 is assembled along the entire length of the prepreg 101. In this case, as... Figure 13 As shown in (b), the outer surface 1a of the first cylindrical portion 1 is a smooth surface, and the outer surface 1a of the first cylindrical portion 1 is composed of the third smooth portion 22 and the fourth smooth portion 23.

[0057] Figure 14This describes a structure in which a cylindrical winding reel seat 90 is fitted to the first cylindrical portion 1. The winding reel seat 90 is fitted to the small-diameter portion 10. The rear end of the winding reel seat 90 abuts against the undercut portion 20 in the axial direction, preferably in a locking manner. The undercut portion 20 in the axial direction functions as a stop, preventing the winding reel seat 90 from moving rearward, thus securely fixing the winding reel seat 90 to the first cylindrical portion 1. Furthermore, the large-diameter portion 12 is located at the rear of the winding reel seat 90, so it can be gripped well even without a handle made of EVA or the like at the rear of the winding reel seat 90.

[0058] In addition, such as Figure 15 As shown, the first cylindrical portion 1 may also have both a radial undercut portion 13 and an axial undercut portion 20. The axial undercut portion 20 is provided on the front side compared to the radial undercut portion 13, but it may also be arranged in the opposite direction. In this embodiment, the first cylindrical portion 1 has, in sequence from the front side, a small diameter portion 10, an axial undercut portion 20, a front large diameter portion 30, an enlarged diameter portion 11, and a rear large diameter portion 31.

[0059] The spindle 100, following the shape of the first cylindrical portion 1, sequentially comprises a small-diameter metal core portion 110, a large-diameter front portion 112a, an expanded-diameter metal core portion 111, and a large-diameter rear portion 112b from front to rear. A metal core undercut portion 313 is formed between the small-diameter metal core portion 110 and the large-diameter front portion 112a, corresponding to the axial undercut portion 20. Metal core undercut portions 413 are formed at the expanded-diameter metal core portion 111 and the large-diameter rear portion 112b, corresponding to the radial undercut portion 13. On the inner circumferential surface of the silicon tube 102, protrusions 321 corresponding to the axial-radial undercut portion 20 and 421 corresponding to the radial undercut portion 13 are formed.

[0060] Explanation of reference numerals in the attached figures 1 1st cylindrical part 1a outer surface 1b inner surface 2 2nd cylindrical part 10 small diameter section 11 Expanded Diameter Section 12 large diameter parts 13 Radial undercut 13a First concave outer surface 13b First convex inner surface 14. First spiral-shaped concave-convex part 15.1st Smoothing Department 16 No. 2 Smoothing Department 20-axis undercut 20a Second concave outer surface 20b Second convex inner surface 21. Second spiral-shaped concave-convex part 22 No. 3 Smoothing Department 23 No. 4 Smoothing Department 30 Large diameter part at the front 31 Rear Large Diameter Section 40 Third spiral-shaped concave-convex part 90 winding wheel seat 100 mandrels 101 Prepreg 102 silicon tube 102a First flange 102b second flange 103 Fastening Restraint Straps 110 metal core small diameter 111 Metal Core Expanded Diameter Section 112 metal core large diameter part 112a metal core front large diameter part Large diameter section at the rear of the 112b metal core 113 Metal Core Bottom Cut 213 Metal Core Bottom Cut 313 metal core bottom cut 413 metal core bottom cut 121 protrusions 221 protrusions 321 protrusions 421 protrusions 500 recesses.

Claims

1. A fishing rod comprising a rod body having a first cylindrical portion, characterized in that... The aforementioned first cylindrical portion has: Small diameter section; The enlarged diameter section is disposed adjacent to the tail side of the aforementioned small diameter section and expands in diameter toward the tail side of the rod. The large-diameter section is adjacent to the rod tail side of the aforementioned expanded-diameter section; The first region, located in the aforementioned small-diameter portion, has its entire outer surface composed of spirally textured protrusions and recesses with markings; and The second region, adjacent to the rod tip side of the first region, extends from the small diameter portion through the enlarged diameter portion to the large diameter portion, and its entire outer surface is composed of smooth portions. The aforementioned second region has a radially undercut portion, which is formed by a first concave outer surface that is recessed radially inward and a first convex inner surface that protrudes radially inward along the aforementioned first concave outer surface. The aforementioned radial undercut portion is provided from the enlarged diameter portion to the aforementioned large diameter portion.

2. A fishing rod comprising a rod body having a first cylindrical portion, characterized in that... The aforementioned first cylindrical portion has a small-diameter portion and a large-diameter portion, and has: Region 1, located in the aforementioned small-diameter portion, has its entire outer surface composed of spirally textured protrusions and recesses with markings; and The second region, adjacent to the rod tip side of the aforementioned first region, is formed from the aforementioned small diameter portion to the aforementioned large diameter portion, and its entire outer surface is composed of smooth portions. The aforementioned second region has an undercut portion in the axial direction, which is formed by a second concave outer surface that is recessed inward toward the rod tail side in the axial direction, and a second convex inner surface that protrudes inward toward the rod tail side in the axial direction along the aforementioned second concave outer surface.

3. A fishing rod, wherein the fishing rod comprises a rod body, the rod body having a first cylindrical portion, The aforementioned first cylindrical portion has a small-diameter portion and a large-diameter portion, and has: Region 1, located in the aforementioned small-diameter portion, has its entire outer surface composed of spirally textured protrusions and recesses with markings; and The second region, adjacent to the rod tip side of the aforementioned first region, is formed from the aforementioned small diameter portion to the aforementioned large diameter portion, and its entire outer surface is composed of smooth portions. The aforementioned second region has a radial undercut and an axial undercut. The aforementioned radial undercut portion is formed by a first concave outer surface that is recessed radially inward and a first convex inner surface that protrudes radially inward along the aforementioned first concave outer surface. The aforementioned undercut portion in the axial direction is formed by a second concave outer surface that is recessed inward toward the rod tail side in the axial direction, and a second convex inner surface that protrudes inward toward the rod tail side in the axial direction along the aforementioned second concave outer surface.

4. A fishing rod, wherein the fishing rod comprises a rod body, the rod body having a first cylindrical portion, The aforementioned first cylindrical portion has a small-diameter portion and a large-diameter portion, and has: Region 1, located in the aforementioned small-diameter portion, has its entire outer surface composed of spirally textured protrusions and recesses with markings; and The second region, adjacent to the first region on the rod tip side, extends from the small-diameter portion to the large-diameter portion, and its entire outer surface is composed of smooth sections. The aforementioned second region has an undercut portion, which is formed by a concave outer surface that is recessed and a convex inner surface that protrudes convexly along the aforementioned concave outer surface. The aforementioned first cylindrical portion also has a third region, which is adjacent to the aforementioned second region on the opposite side of the aforementioned first region in the axial direction, and the entire circumference of the outer surface is composed of spiral-shaped protrusions and depressions with markings.

5. A fishing rod, wherein the fishing rod comprises a rod body, the rod body having a first cylindrical portion, The aforementioned first cylindrical portion has a small-diameter portion and a large-diameter portion, and has: Region 1, located in the aforementioned small-diameter portion, has its entire outer surface composed of spirally textured protrusions and recesses with markings; and The second region, adjacent to the rod tip side of the aforementioned first region, is formed from the aforementioned small diameter portion to the aforementioned large diameter portion, and its entire outer surface is composed of smooth portions. The aforementioned second region has an undercut portion, which is formed by a concave outer surface that is recessed and a convex inner surface that protrudes convexly along the aforementioned concave outer surface. The aforementioned rod body also has a second cylindrical portion, which is connected to the aforementioned first cylindrical portion, and the entire circumference of its outer surface is composed of spiral-shaped protrusions and depressions with markings.

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