Nut, reel seat for fishing rod, and fishing rod

Abstract

The present invention is a nut for moving a cover body of a moving cover by being screwed into a male thread part of a reel base body in which a reel leg placement part on which a reel leg is placed is formed, the nut being provided with: a nut base part having a recessed part on the outer peripheral surface and having a female thread part for movement by being screwed into the male thread part of the reel base body on the inner peripheral surface, the nut base part having a recessed part on the outer peripheral surface and a female thread part for movement by being screwed into the female thread part of the reel base body; the end part of the cover body is clamped on the movable cover; and a cylindrical part which has a convex part that engages with the concave part and is fixed to the outside of the nut base part, and in a state in which the convex part of the cylindrical part engages with the concave part of the nut base part, the nut base part is press-fitted and fixed to the cylindrical body in the circumferential direction and the radial direction of the nut base part.

Description

Technical Field

[0001] The present invention relates to a nut, a fishing rod reel seat equipped with the nut, and a fishing rod equipped with the fishing rod reel seat. Background Art

[0002] Various devices for securing a fishing reel's rod mounting foot to a fishing rod are known. Such reel securing devices typically include a reel base body having a placement portion for the reel's rod mounting foot. A fixed cover is provided at one end of the reel base body to secure one end of the rod mounting foot. A movable cover is mounted at the other end of the reel base body, facing and movable relative to the fixed cover.

[0003] The movable cover is typically constructed with an insertion portion for inserting the other end of the fishing rod mounting foot and an operating knob rotatably mounted on the insertion portion. The operating knob is constructed with a cylindrical base that screws into a threaded portion formed on the other end of the reel seat body, and a decorative cover member mounted on the outer circumference of the base. The cover member is typically secured to the base using an adhesive applied to both the outer circumference of the base and the inner circumference of the cover member.

[0004] As such an operating knob, Patent Document 1 discloses a nut for a fishing rod reel seat, which is used to threadably engage with the external threaded portion of the reel seat body to move a movable cover. The nut comprises: an inner cylindrical body having an internally threaded portion on its inner circumference for threadably engaging with the external threaded portion of the reel seat body; and an outer cylindrical body fixed to the outside of the inner cylindrical body, the outer circumference of which forms at least a portion of the outer circumference of the nut. The outer cylindrical body has a through hole extending therethrough in the inner-outer direction, and a fixing portion is provided at a position farther from the movable cover than the through hole for fixing the outer circumference of the inner cylindrical body to the inner circumference of the outer cylindrical body. Furthermore, the fixing portion preferably comprises at least one of an adhesive portion and a threaded portion. If the fixing portion comprises an adhesive portion, the outer circumference of the inner cylindrical body and the inner circumference of the outer cylindrical body can be easily fixed by adhesive bonding.

[0005] Patent Literature Patent Document 1: Japanese Patent Application Laid-Open No. 2020-89310 Summary of the Invention

[0006] However, since the nut disclosed in patent document 1 for moving the movable cover is provided with a fixing portion for fixing the outer circumferential surface of the inner cylinder and the inner circumferential surface of the outer cylinder, and the outer circumferential surface of the inner cylinder and the inner circumferential surface of the outer cylinder are fixed by an adhesive or screw fixing structure, there is a problem that not only the structure including the fixing portion is complicated, but also the adhesive or screw fixing process is inevitable, and the manufacturing process has to be complicated.

[0007] The present invention has been developed in light of the above-mentioned circumstances, and aims to provide a nut that can reduce looseness of the cylindrical portion relative to the nut base in the rotational and axial directions, while reliably securing the cylindrical portion to the nut base; a fishing rod reel seat including the nut; and a fishing rod including the fishing rod reel seat. Other objects of the present invention, other than those described above, will become apparent by referring to this entire specification.

[0008] In order to achieve the above-mentioned purpose, the first invention of the present invention is a nut that is screwed into the external threaded portion of a reel seat body having a reel foot placement portion for placing the reel foot, and is used to move the cover body of a movable cover, characterized in that it comprises: a nut base having a concave portion on the outer peripheral surface, and an internal threaded portion for movement that is screwed into the external threaded portion of the reel seat body on the inner peripheral surface, and is fixed to the cover body of the movable cover through an end portion; and a cylindrical portion having a convex portion that is engaged with the concave portion and is fixed to the outside of the nut base, and when the convex portion of the cylindrical portion is engaged with the concave portion of the nut base, the nut base is pressed into and fixed to the cylindrical portion in the circumferential and radial directions of the nut base.

[0009] In one embodiment, one or more grooves extending along the central axis direction of the nut base are formed on the outer peripheral surface of the nut base, and the concave portion is formed in a part of the groove.

[0010] In one embodiment, the groove portion includes a base portion, a first inclined portion, a top portion, and the concave portion.

[0011] In one embodiment, the convex portion of the cylindrical portion includes a second inclined portion, the second inclined portion being formed on the cover body side of the moving cover and increasing in height as it moves away from the moving cover.

[0012] In one embodiment, the convex portion of the cylindrical portion includes the second inclined portion and an upper surface portion when viewed in the central axis direction of the cylindrical portion.

[0013] In one embodiment, the upper surface portion is a planar portion extending in the direction of the central axis of the cylindrical portion.

[0014] In one embodiment, the length of the convex portion of the cylindrical portion in the direction of the central axis of the cylindrical portion is 3 mm or more.

[0015] In one embodiment, the length of the planar portion in the direction of the central axis of the cylindrical portion is 0.3 mm to 1.5 mm.

[0016] In one embodiment, when observed in the circumferential direction of the cylindrical portion, the convex portion of the cylindrical portion includes the upper portion and curved portions extending from both sides of the circumferential direction of the upper portion, and the bending radius (R) of the curved portion at the end opposite to the upper portion is 0.5 mm to 0.8 m.

[0017] In one embodiment, the depth of the base portion of the groove is 0.1 mm to 0.2 mm deeper than the depth of the recessed portion of the groove.

[0018] In one embodiment, the hardness of the nut base is lower than the hardness of the cylindrical portion.

[0019] In one embodiment, the convex portion of the cylindrical portion has a second inclined portion, which is formed on the cover body side of the movable cover, and its height increases as it moves away from the movable cover, and the inclination angle of the first inclined portion of the groove portion is the same as or different from the inclination angle of the second inclined portion.

[0020] Furthermore, a second aspect of the present invention is a fishing rod reel seat comprising the nut according to the first aspect.

[0021] Furthermore, a third aspect of the present invention is a fishing rod comprising the fishing rod reel seat according to the second aspect.

[0022] In addition, the fourth invention of the present invention is a nut that is screwed into the external threaded portion of a reel seat body having a reel foot placement portion for placing the reel foot, and is used to move the cover body of the movable cover, and is characterized in that it comprises: a nut base having a convex portion on the outer peripheral surface, and an internal threaded portion for movement that is screwed into the external threaded portion of the reel seat body on the inner peripheral surface, and is fixed to the cover body of the movable cover through an end portion; and a cylindrical portion having a concave portion that is engaged with the convex portion, and is fixed to the outside of the nut base, and when the concave portion of the cylindrical portion is engaged with the convex portion of the nut base, the nut base is pressed into and fixed to the cylindrical portion in the circumferential and radial directions of the nut base.

[0023] In one embodiment, one or more grooves extending along the central axis of the cylindrical portion are formed on the inner peripheral surface of the cylindrical portion, and the concave portion is formed in a portion of the groove.

[0024] Furthermore, a fifth invention of the present invention is a fishing rod reel seat including the nut according to the fourth invention.

[0025] Furthermore, a sixth aspect of the present invention is a fishing rod including the fishing rod reel seat according to the fifth aspect.

[0026] According to the above-mentioned inventions, there can be provided a nut capable of reducing looseness of the cylindrical portion relative to the nut base in the rotational direction and the axial direction and capable of reliably fixing the cylindrical portion and the nut base, a fishing rod reel seat having the nut, and a fishing rod having the fishing rod reel seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a figure which shows the fishing rod concerning the 1st embodiment of this invention. Figure 2 It is a diagram showing a fishing rod reel seat according to a first embodiment of the present invention. Figure 3 It is a cross-sectional view showing a nut according to the first embodiment of the present invention. Figure 4 It is a diagram showing a nut base and a cylindrical portion of a nut according to the first embodiment of the present invention. Figure 5 These are views for explaining press-fitting and fixing of a nut according to the first embodiment of the present invention. Figure 6 (a) is a perspective view of a nut base according to a first embodiment of the present invention, (b) is a cross-sectional view of the nut base, and (c) is a side view of the nut base. Figure 7 (a) is a three-dimensional view of the cylindrical portion involved in the first embodiment of the present invention, (b) is the first sectional view of the cylindrical portion, (c) is an enlarged view of a portion (C) of the cross section of the cylindrical portion, (d) is the second sectional view of the cylindrical portion, and (e) is an enlarged view of a portion (E) of the cross section of the cylindrical portion. Figure 8 It is a figure which shows the nut concerning the 2nd embodiment of this invention. Explanation of symbols 1-fishing rod; 2-rod body; 3-first rod section; 5-middle rod; 6-reel; 6a-reel foot; 7-rod tip section; 8-nut; 9-reel seat; 10-fishing line guide; 12-reel seat body; 12a-reel foot placement surface; 13-cylindrical part placement surface; 14-fixing cover; 15-nut base; 16-concave part; 17-cylindrical part; 18-threaded part (external threaded part); 19-convex part; 20-groove part; 20a-base; 20b-first inclined part; 20c-top; 21-protruding wall; 22-movable cover; 23-locked part; 24-internal threaded part; 25-locking part; 26-cover body; 27-end; 28-reel foot holding part; 80-nut. DETAILED DESCRIPTION

[0028] Below, embodiments of the nut, reel seat, and fishing rod according to the present invention are described in detail with reference to the accompanying drawings. Common components in the multiple drawings are identified by the same reference numerals across the multiple drawings. For ease of explanation, the drawings are not necessarily drawn to scale; please note this.

[0029] (First embodiment) Figure 1 This figure illustrates a fishing rod according to a first embodiment of the present invention. As shown in the figure, a fishing rod 1 according to one embodiment of the present invention comprises a rod body 2, a reel 6 mounted on the rod body 2 via a reel seat 9, and a fishing line guide 10 mounted on the rod body 2. In the illustrated embodiment, the reel seat 9 and the fishing line guide 10 each correspond to mounting components mounted on the outer circumference of the rod body.

[0030] The rod body 2 is formed, for example, by connecting a first rod section 3, a middle rod section 5, and a rod tip section 7. These rod sections are connected, for example, by plug-in connection. The first rod section 3, the middle rod section 5, and the rod tip section 7 can be connected by a pull-out connection, a reverse plug-in connection, a sleeve connection, or any other known connection method. The rod body 2 can also be composed of a single rod section.

[0031] The first rod section 3, the middle section 5 and the rod tip section 7 are, for example, composed of a tubular body made of fiber-reinforced resin. The tubular body made of fiber-reinforced resin is made by winding a fiber-reinforced resin polyester film (prepreg) in which a matrix resin is impregnated in the reinforcing fiber on a core shaft, and heating the prepreg to solidify it. As the reinforcing fiber contained in the prepreg, for example, carbon fiber, glass fiber and any other known reinforcing fiber can be used. As the matrix resin contained in the prepreg, a thermosetting resin such as epoxy resin can be used. After the prepreg is solidified, the core shaft is de-cored. In addition, the outer surface of the tubular body can be appropriately ground. Each rod body can also be constructed as a solid shape.

[0032] In the illustrated embodiment, multiple line guides 10 (line guides 10A to 10D) are provided on the first rod section 3, the middle rod section 5, and the tip section 7 to guide the fishing line being paid out from the reel 6 mounted on the reel seat 9. More specifically, the first rod section 3 is provided with the line guide 10A, the middle rod section 5 is provided with the line guide 10B, and the tip section 7 is provided with the line guide 10C. Although a top guide 10D is provided at the tip of the tip section 7, a detailed description thereof is omitted.

[0033] Next, refer to Figure 2The reel seat 9 having a reel seat body 12 and a nut 8 according to the first embodiment of the present invention is described. As shown in the figure, the reel seat 9 according to the first embodiment has a reel seat body 12, and the reel seat body 12 has a reel foot placement surface (reel foot placement portion) 12a along its axial direction for placing the reel foot 6a of the fishing reel 6. The reel seat body 12 is formed into a cylindrical shape as a whole. In addition, the reel seat body 12 is formed of a suitable material such as a synthetic resin (for example, a polyamide synthetic resin or ABS resin, etc.) or a metal (for example, SUS, aluminum, titanium, brass, etc.). The reel seat body 12 can be configured to have a length of 60-160 mm, for example, but is not limited to this.

[0034] In addition, the reel seat body 12 is formed with a gripping portion 12b having a curved outer surface, wherein the curved outer surface slightly bulges on the opposite side of the reel foot placement surface 12a, thereby facilitating gripping by supporting the thumb or its proximal portion when holding the reel with the gripping hand.

[0035] The reel foot placement surface 12a of the reel seat body 12 may be formed to be flat, or may be formed to have a greater curvature than other circumferential portions (such as the grip portion 12b) adjacent to the reel foot placement surface 12a of the reel seat body 12 and to be substantially flat, and may be formed to be Figure 2 The reel seat body 12 is shown in an axially extending state. A fixed cover 14 is integrally provided at one end (rod tail side) of the reel seat body 12. One end of the reel foot placement surface 12a of the reel seat body 12 is disposed within the fixed cover 14.

[0036] The reel seat body 12 is integrally provided with a cylindrical body and a threaded portion (external threaded portion) 18 formed with a guide groove on the other end (rod tail side). On the cylindrical body, there is formed a cylindrical portion placement surface 13 that is connected to the reel foot placement surface 12a of the reel seat body 12 or has a small step. The cylindrical portion placement surface 13 is also formed by being connected to the threaded portion (external threaded portion) 18. On the other end (rod tail side), on the outside of the cylindrical body and the threaded portion 18, a movable cover 22 that can move freely in the axial direction is installed. Here, there is a case where the reel seat body 12 and the movable cover 22, or the reel seat body 12, the movable cover 22 and the nut 8 described later are referred to as the reel seat 9, but detailed description is omitted. In addition, the movable cover 22 sometimes refers to the cover body 26 and the reel foot retaining portion 28 described later, and sometimes refers to the movable cover 22 including the nut 8, but in this specification, the latter case is used as the premise for explanation.

[0037] like Figure 2As shown, the fixed cover 14 of the reel stand body 12 has an opening 14a for accommodating one end of the reel leg 6a, which opens toward the movable cover 22. The opening 14a of the fixed cover 14 is formed so that the inner surface gradually decreases in height toward the front of the reel stand body 12. When one end of the reel leg 6a is accommodated in the opening 14a and pressed through the opening 14a, the reel leg 6a is forced (pressed) toward the reel leg placement surface 12a disposed within the fixed cover 14.

[0038] The fixed cover 14 is not limited to being integrally provided with the reel seat body 12, and may be formed as a separate structure from the reel seat body 12 using metal or a hard synthetic resin and securely fixed to the reel seat body 12. In the case of being formed of metal, it is preferable to arrange a resin member at the portion that contacts the reel leg 6a of the reel 6 to prevent damage to the components due to metal-to-metal contact.

[0039] The movable cover 22 is formed into a sleeve shape with an axial hole passing through the threaded portion (external threaded portion) 18 for passing through the reel seat body 12, and has a cover body 26 and a reel foot retaining portion 28 formed on the inner side of the cover body 26. The cover body 26 is formed of, for example, a synthetic resin. In addition, a nut 8 is rotatably connected to the rear part (rod tail side) of the cover body 26 of the movable cover 22. The nut 8 has a nut base described later and a cylindrical portion also described later, the nut base is formed of, for example, a synthetic resin, a polyamide synthetic resin, an ABS resin, etc., and the cylindrical portion is formed of, for example, a metal such as SUS, aluminum, brass, etc., but is not limited thereto.

[0040] The nut 8 according to the first embodiment of the present invention has an internal thread portion 24 formed on the inner circumference thereof, which is screwed into the thread portion (external thread portion) 18 of the reel seat body 12. In addition, the front end portion of the nut 8 (referring to the end portion on the side of the cover body 26 of the movable cover 22) and the rear end portion of the cover body 26 of the movable cover 22 (referring to the end portion on the side of the front end portion of the nut 8) are connected (locked) in a state in which they can rotate freely relative to each other and are prevented from coming off. In more detail, the nut 8 has a locking portion 25 (referring to the later-described Figure 3 ) and with the locked portion 23 at the rear end of the cover body 26 (see Figure 3 ) is locked, can be constituted to, can rotate relatively freely and can prevent from coming off. In addition, can consider the connection structure of various nut 8 and cover body 26, be not limited to specific form.

[0041] The nut 8 is threadedly engaged with the threaded portion (external thread) 18 of the reel seat body 12 and is rotatable. As described above, since the cover body 26 is connected to the nut 8, when the nut 8 is rotated in the forward direction relative to the threaded portion (external thread) 18, the nut 8 approaches the fixed cover 14, and the cover body 26 of the movable cover 22 approaches the fixed cover 14. On the other hand, when the nut 8 is rotated in the reverse direction relative to the threaded portion (external thread) 18, the nut 8 moves away from the fixed cover 14, and the cover body 26 of the movable cover 22 moves away from the fixed cover 14.

[0042] The cover body 26, which moves axially within the reel seat body 12 by rotation of the nut 8, has an opening 26a that opens forward and inwardly. The opening 26a is secured with a reel foot holder 28 for accommodating the rear end of the reel foot 6a of the fishing reel 6. When the movable cover 22 is attached to the threaded portion (external thread) 18 of the reel seat body 12, the opening 26a of the cover body 26 faces the opening 14a of the fixed cover 14. The opening 26a of the cover body 26 is formed so that, in contrast to the opening 14a of the fixed cover 14, the height of the inner surface gradually decreases toward the rear.

[0043] Next, refer to Figure 2 、 3 , 4, 5, 6 and 7 further describe the nut 8 involved in the first embodiment in detail. Figure 3 is a cross-sectional view showing a nut according to the first embodiment, Figure 4 1 is a diagram showing a nut base and a cylindrical portion according to a first embodiment. Figure 5 These are diagrams for explaining press-fitting and fixing of the nut according to the first embodiment. Figure 6 (a) is a perspective view of a nut base according to the first embodiment, (b) is a cross-sectional view of the nut base, and (c) is a side view of the nut base. Figure 7 (a) is a three-dimensional view of the cylindrical portion involved in the first embodiment, (b) is the first sectional view of the cylindrical portion, (c) is an enlarged view of a portion (C) of the cross section of the cylindrical portion, (d) is the second sectional view of the cylindrical portion, and (e) is an enlarged view of a portion (E) of the cross section of the cylindrical portion.

[0044] The nut 8 is a nut that is screwed into the external threaded portion 18 of the reel seat body 12, which is formed with the reel foot placement portion 12a for placing the reel foot 6a, and is used to move the cover body 26 of the movable cover 22. It includes: a nut base 15, which has a concave portion 16 on the outer peripheral surface, and has an internal threaded portion 24 for movement that is screwed into the external threaded portion 18 of the reel seat body on the inner peripheral surface, and is locked to the end 23 of the cover body 26 of the movable cover 22 through the end 25; and a cylindrical portion 17, which has a convex portion 19 that is engaged with the concave portion 16 and is fixed to the outside of the nut base 15 through the convex portion 19. When the convex portion 19 of the cylindrical portion 17 is engaged with the concave portion 16 of the nut base 15, the nut base 15 is subjected to circumferential movement (approximately circumferential direction ( Figure 5 (b) The direction indicated by the arrow A) and the radial direction (through Figure 5 The press-fit shown in (a) and (b) is pressed in and fixed by applying pressure in the radial direction (the direction shown by the arrow B).

[0045] The range of the size of the press-fit of the cylindrical portion 17 into the nut base 15 is 0 mm to 0.25 mm, more preferably 0.5 mm to 2.0 mm. (Also, even in the case of a size range of 0 mm, since the cross-sectional shape is not a perfect circle, contact is made at at least one of the four circumferential locations.) In this way, the nut base 15 is subjected to pressure due to the press-fit of the cylindrical portion 17, and the nut base 15, which has a relatively lower hardness than the cylindrical portion 17, is slightly deformed within a range that does not affect the structure and function of the nut base 15, thereby press-fitting the cylindrical portion 17 into the nut base 15 and securing it.

[0046] With the above structure, the nut base 15 and the cylindrical portion 17 do not need to use adhesive, or only a small amount of adhesive is used as an auxiliary to avoid looseness between the two parties beyond the prescribed limit, and the cylindrical portion 17 can be simply and effectively fixed to the nut base 15.

[0047] According to the nut 8 of the present invention, a nut can be provided that can reduce loosening of the cylindrical portion relative to the nut base in the rotational and axial directions, while reliably securing the cylindrical portion and the nut base. More specifically, the nut base 15 is subjected to circumferential pressure (substantially circumferentially due to press-fitting (the direction indicated by arrow A)) of the nut base 15 via the cylindrical portion 17, thereby reliably securing the cylindrical portion 17 and the nut base 15 while reducing loosening in the rotational direction. Furthermore, due to the radial pressure (radially due to press-fitting (the direction indicated by arrow B)), a radial pressing force of the cylindrical portion 17 against the nut base 15 is generated, generating friction between the upper surface 19b of the cylindrical portion 17 and the concave portion 16 of the nut base 15. This allows for reliably securing the cylindrical portion 17 and the nut base 15 while reducing loosening of the cylindrical portion 17 in the axial direction (the direction of the central axis X of the nut 8).

[0048] Furthermore, since the nut base 15 is formed so that the end 15a on the side of the cover body 26 of the movable cover 22 protrudes radially outward, the end 17a of the cylindrical portion 17 on the side of the cover body 26 of the movable cover 22 abuts against the end 15a of the nut base 15, thereby restricting movement of the cylindrical portion 15 in the direction of the central axis X of the nut 8 toward the cover body 26 of the movable cover 22. This further reduces axial looseness of the cylindrical portion 17 (in the direction of the central axis X of the nut 8), and enables more reliable fixation between the cylindrical portion 17 and the nut base 15.

[0049] Next, refer to Figure 6 The structure of the nut base 15 is described in detail. Figure 6 As shown, the nut base 15 has one or more grooves 20 formed on its outer peripheral surface, extending linearly in the direction of the central axis of the nut base 15, and the concave portion 16 is a portion of the groove 20. Furthermore, the plurality of grooves 20 are each configured to include, as viewed from the side of the groove 20 opposite to the cover body 26 of the movable cover 22, a base portion 20a, a first inclined portion 20b, a top portion 20c, and the concave portion 16.

[0050] The plurality of grooves 20 are each configured to include, as viewed from the side of the groove 20 opposite the cover body 26 of the movable cover 22, a base portion 20a, a first inclined portion 20b, a top portion 20c, an inclined portion (not shown) different from the first inclined portion, and a concave portion 16. Thus, when the cylindrical portion 17 is mounted on the nut base 15, the convex portion 19 of the cylindrical portion 17 is guided by the base 20a of one of the plurality of grooves 20 and then guided to ride on the first inclined portion 20b. When it passes the top portion 20c (if it has an inclined portion different from the first inclined portion, it is guided to pass the top portion 20c and descend along the other inclined portion), the convex portion 19 of the cylindrical portion 17 engages and locks with the concave portion 16 of the nut base 15, thereby securing the cylindrical portion 17 to the nut base 15.

[0051] When a plurality of grooves 20 are provided on the nut base 15, the number of the grooves 20 can be any number greater than 2 (can be an even number or an odd number). The number of the grooves 20 is, for example, 2 or 4, but is not limited thereto. In addition, when a plurality of grooves 20 are provided on the nut base 15 (for example, at positions of 0°, 90°, 180°, and 270° in the circumferential direction), a plurality of convex portions 19 (for example, at positions of 0°, 90°, 180°, and 270° in the circumferential direction) can be provided on the cylindrical portion 17 according to the respective positions of the plurality of grooves 20 (for example, at positions of 0°, 90°, 180°, and 270° in the circumferential direction).

[0052] Thus, when the cylindrical portion 17 is mounted on the nut base 15, the convex portions 19 of the cylindrical portion 17 are guided by the base portions 20a of the respective groove portions 20, and are then guided so as to ride on the first inclined portion 20b. When the convex portions 19 of the cylindrical portion 17 exceed the top portion 20c (if a second inclined portion is provided, the convex portions 19 are guided so as to exceed the top portion 20c and descend along an inclined portion different from the first inclined portion), the convex portions 19 of the cylindrical portion 17 are respectively fitted into and locked with the concave portions 16 of the nut base 15, thereby fixing the cylindrical portion 17 to the nut base 15. By using the multiple concave portions 16 and the multiple convex portions 19, the cylindrical portion 17 can be more firmly fixed to the nut base 15.

[0053] Next, refer to Figure 7 The structure of the cylindrical portion 17 will be described in detail. Figure 7 As shown, the convex portion 19 of the cylindrical portion 15 is configured to include a second inclined portion 19a, which is formed on the cover body 26 side of the movable cover 22 and increases in height as it moves away from the cover body 26 of the movable cover 22. In addition, the convex portion 19 of the cylindrical portion 17 is configured to include the second inclined portion 19a and an upper surface portion 19b when viewed in the direction of the central axis of the cylindrical portion 17 (the direction of the central axis X of the nut 8).

[0054] Furthermore, the upper surface portion 19b is formed of a flat surface extending in the direction of the central axis of the cylindrical portion 17 (the direction of the central axis X of the nut 8). Thus, when the cylindrical portion 17 is press-fitted and secured to the nut base 15, the upper surface portion 19b of the cylindrical portion 17 is formed to press against the bottom side of the recessed portion 16 of the nut base 15. This applies the aforementioned radial pressure (in the direction indicated by arrow B due to the press-fitting), generating a radial pressing force of the cylindrical portion 17 against the nut base 15. This generates friction between the upper surface portion 19b of the cylindrical portion 17 and the recessed portion 16 of the nut base 15. This ensures that the cylindrical portion 17 and the nut base 15 are securely secured while reducing any looseness of the cylindrical portion 17 in the axial direction (the direction of the central axis X of the nut 8).

[0055] Furthermore, the length of the convex portion 19 of the cylindrical portion 17 in the direction of the central axis of the cylindrical portion 17 (the direction of the central axis X of the nut 8) is 3 mm or greater. Furthermore, in the nut 8 according to one embodiment of the present invention, the length of the flat portion, or upper surface portion 19b, in the direction of the central axis of the cylindrical portion 17 (the direction of the central axis X of the nut 8) is 0.3 mm to 1.5 mm.

[0056] When viewed in the circumferential direction of the cylindrical portion 17, the convex portion 19 of the cylindrical portion 17 includes an upper portion 19b and curved portions 19c extending from both sides of the upper portion 19b in the circumferential direction. The fillet radius (R) of the end portion 19d of the curved portion 19c on the opposite side to the upper portion 19b is 0.5mm to 0.8m. Figure 2 As shown, by using the rounded end portions 19d of the two curved portions 19c of the cylindrical portion 17 to press and abut the end portions 16b of the side walls 16a of the recessed portion 16 forming the nut base 15, a pressure in a roughly circumferential direction (the direction indicated by the arrow A) is applied by pressing, thereby reducing looseness in the rotational direction.

[0057] The depth of the base portion 20a of the groove 20 (the radial depth of the nut base 15) is 0.1 to 0.2 mm deeper than the depth of the recess 16 of the groove 20 (the radial depth of the nut base 15). This facilitates the guidance of the convex portion 19 by the groove 20.

[0058] The nut 8 is configured such that the convex portion 19 of the cylindrical portion 17 includes the second inclined portion 19a, and the first inclined portion 20b of the groove 20 has an inclination angle that is the same as or different from the inclination angle of the second inclined portion 19a of the convex portion 19 of the cylindrical portion 17. This facilitates the engagement of the convex portion 19 with the concave portion 16.

[0059] The nut involved in the present invention is a nut for screwing into the external threaded portion of a reel seat body having a reel foot placement portion for placing a reel foot, so as to move the cover body of a movable cover, and is characterized in that it comprises: a nut base having a convex portion on the outer peripheral surface and an internal threaded portion for movement that screws into the external threaded portion of the reel seat body on the inner peripheral surface and is locked with the cover body of the movable cover through the end portion; and a cylindrical portion having a concave portion that engages with the convex portion and is thereby fixed to the outside of the nut base, and in a state in which the concave portion of the cylindrical portion is engaged with the convex portion of the nut base, the nut base is pressed and fixed in the circumferential and radial directions of the nut base by the cylindrical portion. According to the nut involved in the present invention, a nut can be provided that can reduce looseness of the cylindrical portion relative to the nut base in the rotational direction and in the axial direction, and can effectively fix the cylindrical portion and the nut base.

[0060] (Second embodiment) Next, refer to Figure 8 The nut 80 according to the second embodiment of the present invention will be described. (The basic structure of the nut 80 according to the second embodiment is the same as that of the nut 8 according to the first embodiment, and therefore, the description thereof will be omitted.) The cover body 26 of the movable cover 22 of the nut 80 according to the second embodiment has a locking portion 23 at its end, and the nut base 15 has a locking portion 25 at its end. The locking portion 23 is disposed radially outside the nut 8, and the locking portion 25 is disposed radially inside the nut 8. The locking portion 25 is locked to the locking portion 23 from the radial inside.

[0061] Furthermore, the nut base 15 is configured to include a protruding wall 21 between the recessed portion 16 and the locking portion 25. The end 27 of the cylindrical portion 17, which is located on the cover body 26 side of the movable cover 22, abuts against the protruding wall 21. This configuration restricts movement of the cylindrical portion 15 in the direction of the central axis X of the nut 80 toward the cover body 26 side of the movable cover 22. This reduces axial looseness of the cylindrical portion 17 (in the direction of the central axis X of the nut 80), ensuring reliable fixation between the cylindrical portion 17 and the nut base 15.

[0062] (Third embodiment) While the first and second embodiments described above illustrate examples in which a convex portion is formed on the nut base and a concave portion is formed on the cylindrical portion, the third embodiment has the opposite configuration (not shown). Specifically, the nut base has a convex portion formed on its outer circumferential surface, and an internally threaded portion for movement that screws into the externally threaded portion of the reel seat body on its inner circumferential surface and is secured to the cover body of the movable cover via its end portion. Meanwhile, the cylindrical portion has a concave portion that engages with the convex portion of the nut base, securing it to the outside of the nut base. Furthermore, with the concave portion of the cylindrical portion engaged with the convex portion of the nut base, the nut base is press-fitted and secured to the cylindrical portion in both the circumferential and radial directions of the nut base. In addition, at this moment, one or more grooves extending along the central axis direction of the cylindrical portion are formed on the inner circumferential surface of the cylindrical portion, and the concave portion is formed in a part of the groove portion. Moreover, as for other structures such as the inclined portions formed on the nut base and the cylindrical portion, it is sufficient to adopt structures opposite to those of the first and second embodiments on the nut base and the cylindrical portion, respectively.

[0063] A fishing rod reel seat 9 according to an embodiment of the present invention is configured to include the nut 8 described in any of the above-described embodiments, and a fishing rod 1 according to an embodiment of the present invention is configured to include the reel seat 9 .

[0064] The dimensions, materials, and configurations of the various components described in this specification are not limited to those explicitly described in the embodiments. These components may be modified within the scope of the present invention to have any dimensions, materials, and configurations. Furthermore, components not explicitly described in this specification may be added to the described embodiments, and some of the components described in the various embodiments may be omitted.

Claims

1. A nut screwed into an external threaded portion of a reel seat body having a reel foot placement portion for placing a reel foot, for moving a cover body of a movable cover, characterized in that: have: a nut base having a concave portion on its outer circumferential surface and an internal threaded portion on its inner circumferential surface for movement that is threadedly engaged with the external threaded portion of the reel seat body, and being locked to the cover body of the movable cover through its end portion; and a cylindrical portion having a convex portion engaged with the concave portion and fixed to the outside of the nut base, In a state in which the convex portion of the cylindrical portion is engaged with the concave portion of the nut base, the nut base is press-fitted and fixed to the cylindrical portion in the circumferential and radial directions of the nut base.

2. The nut according to claim 1, characterized in that One or more grooves extending along a central axis direction of the nut base are formed on an outer peripheral surface of the nut base, and the concave portion is formed in a portion of the groove.

3. The nut according to claim 2, characterized in that The groove portion includes a base portion, a first inclined portion, a top portion, and the concave portion.

4. The nut according to claim 1, characterized in that The convex portion of the cylindrical portion includes a second inclined portion that is formed on the cover body side of the moving cover and increases in height as it moves away from the moving cover.

5. The nut according to claim 4, characterized in that The convex portion of the cylindrical portion includes the second inclined portion and an upper surface portion when viewed in the central axis direction of the cylindrical portion.

6. The nut according to claim 5, characterized in that The upper surface portion is a flat surface portion extending in the direction of the central axis of the cylindrical portion.

7. The nut according to claim 1, characterized in that The length of the convex portion of the cylindrical portion in the direction of the central axis of the cylindrical portion is 3 mm or more.

8. The nut according to claim 6, characterized in that The length of the planar portion in the direction of the central axis of the cylindrical portion is 0.3 mm to 1.5 mm.

9. The nut according to claim 5, characterized in that Viewed in the circumferential direction of the cylindrical portion, the convex portion of the cylindrical portion includes the upper portion and curved portions extending from both sides of the upper portion in the circumferential direction, and the bending radius R of the curved portion at the end opposite to the upper portion is 0.5 mm to 0.8 m.

10. The nut according to claim 3, characterized in that The depth of the base portion of the groove portion is deeper than the depth of the recessed portion of the groove portion by 0.1 mm to 0.2 mm.

11. The nut according to claim 1, wherein: The hardness of the nut base is smaller than the hardness of the cylindrical portion.

12. The nut according to claim 3, characterized in that The convex portion of the cylindrical portion has a second inclined portion, which is formed on the cover body side of the movable cover and increases in height as it moves away from the movable cover, and the inclination angle of the first inclined portion of the groove portion is the same as or different from the inclination angle of the second inclined portion.

13. A fishing rod reel seat, characterized in that: A nut according to any one of claims 1 to 12.

14. A fishing rod, characterized in that: A fishing rod reel seat according to claim 13 is provided.

15. A nut screwed into an external threaded portion of a reel seat body having a reel foot placement portion for placing a reel foot, for moving a cover body of a movable cover, characterized in that: have: a nut base having a convex portion on its outer circumferential surface and an internal threaded portion on its inner circumferential surface for movement that is threadedly engaged with the external threaded portion of the reel seat body, and being locked to the cover body of the movable cover through its end portion; and a cylindrical portion having a concave portion engaged with the convex portion and fixed to the outside of the nut base, In a state in which the concave portion of the cylindrical portion is engaged with the convex portion of the nut base, the nut base is press-fitted and fixed to the cylindrical portion in the circumferential and radial directions of the nut base.

16. The nut according to claim 15, characterized in that One or more grooves extending along the central axis direction of the cylindrical portion are formed on the inner peripheral surface of the cylindrical portion, and the concave portion is formed in a part of the groove.

17. A fishing rod reel seat, characterized in that: A nut according to claim 15 or 16.

18. A fishing rod, characterized in that: A fishing rod reel seat according to claim 17 is provided.

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