Swivel

Abstract

To provide a swivel capable of improving rotation performance. [Solution] The fishing lure comprises a main body portion (11) having a hollow portion formed therein, a first connecting portion (12) which is arranged at one end of the main body portion (11) so as to be rotatable relative to the main body portion (11) in the axial direction and to which one fishing line is connected, a first ball bearing (13) which is installed between a first base portion (31) of the first connecting portion (12) and the main body portion (11), and a second connecting portion at the other end of the main body portion (11) to which the other fishing line is connected, and is characterized in that at a first contact portion (15) where an inner peripheral surface (22a) of the main body portion (11) and an outer peripheral surface (33a) of the first connecting portion (12) come into contact, plating layers (M1, M2) containing fluororesin are formed on the inner peripheral surface (22a) of the main body portion (11) and the outer peripheral surface (33a) of the first connecting portion (12).

Description

[Technical Field]

[0001] This invention relates to a swivel used in fishing. [Background technology]

[0002] For example, Patent Document 1 discloses a swivel used for fishing. The swivel includes a main body, a first connecting part that is rotatable relative to the main body and to which one fishing line is connected, and a second connecting part that is to which the other fishing line is connected. The main body may have a configuration in which the second connecting part is integrally formed with the main body, or a configuration in which the main body and the second connecting part are separate bodies that are rotatable relative to each other. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-39322 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional swivels have a problem in that frictional resistance occurs at the contact portion between the main body and the first connecting portion (or the second connecting portion), impairing rotational performance.

[0005] The present invention has been made to solve the above problems, and an object of the present invention is to provide a swivel that can improve rotation performance. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a fishing lug comprising: a main body having a hollow portion formed therein; a first connection portion which is rotatable axially relative to the main body at one end of the main body and to which one fishing line is connected; a first ball bearing which is installed between a first base of the first connection portion and the main body; and a second connection portion which is connected to the other end of the main body at which the other fishing line is connected, wherein at the first contact portion where the inner peripheral surface of the main body and the outer peripheral surface of the first connection portion come into contact, a plating layer containing a fluororesin is formed on at least one of the inner peripheral surface of the main body and the outer peripheral surface of the first connection portion.

[0007] According to the present invention, the first main contact portion is provided with a plating layer containing a fluororesin, thereby improving rotational performance.

[0008] Furthermore, at the first ball contact portion where the inner circumferential surface of the main body portion and the ball of the first ball bearing come into contact, it is preferable that a plating layer containing a fluororesin is formed on at least one of the inner circumferential surface of the main body portion and the outer circumferential surface of the ball.

[0009] According to the present invention, the first ball contact portion is also formed with a plating layer containing fluororesin, thereby further improving rotational performance.

[0010] The fluororesin of the plating layer is preferably polytetrafluoroethylene.

[0011] and a second ball bearing installed between the second seat of the second connection part and the main body. The first contact part, where the inner surface of the main body and the outer surface of the first connection part are in contact with each other, has a plating layer containing a fluororesin formed on at least one of the inner surface of the main body and the outer surface of the first connection part. The second contact part, where the inner surface of the main body and the outer surface of the second connection part are in contact with each other, has a plating layer containing a fluororesin formed on at least one of the inner surface of the main body and the outer surface of the first connection part. The second contact part, where the inner surface of the main body and the outer surface of the second connection part are in contact with each other, has a plating layer containing a fluororesin formed on at least one of the inner surface of the main body and the outer surface of the second connection part. [Effects of the Invention]

[0012] The swivel of the present invention can improve rotation performance. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is an overall cross-sectional view showing a swivel according to a first embodiment of the present invention; [Figure 2] FIG. 2 is an enlarged cross-sectional view of the swivel according to the first embodiment. [Figure 3] FIG. 2 is an enlarged cross-sectional view of a main part of the swivel according to the first embodiment. [Figure 4] FIG. 10 is an enlarged cross-sectional view of a modified example of the first embodiment. [Figure 5] FIG. 4 is an overall cross-sectional view of a swivel according to a second embodiment of the present invention. [Figure 6] FIG. 10 is an enlarged cross-sectional view of a swivel according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate. The same reference numerals are used to designate common components in each drawing. For ease of explanation, the drawings are not necessarily drawn to scale. Regarding the plating layers shown in Figures 2, 4, and 6, illustrations are omitted except for the contact portions.

[0015] [First embodiment] 1, the swivel 1 according to this embodiment is a component that is interposed between the fishing line and the fishing leader, for example, and prevents the fishing line and the fishing leader from twisting (twisting) by rotating relative to each other. The swivel 1 includes a main body 11, a first connecting portion 12, a first ball bearing 13, a second connecting portion 14, a first ball contact portion 15, and a first ball contact portion 16.

[0016] The main body 11 has a cylindrical shape with a bottom, and includes a trunk 21, a first reduced diameter section 22, a second reduced diameter section 23, and a hollow section 24. The trunk 21 is the section that has the largest diameter and is formed with a constant diameter. The first reduced diameter section 22 is formed so that its diameter gradually decreases from the trunk 21 toward one end. The second reduced diameter section 23 is formed so that its diameter gradually decreases from the trunk 21 toward the other end. The hollow section 24 is a section that is provided inside the main body 11 and is hollow.

[0017] The first connecting portion 12 is disposed in the hollow portion 24, with its tip exposed to the outside at one end. The first connecting portion 12 comprises a first seat portion 31, a first shaft portion 32, and a first head portion 33. The first seat portion 31 is disk-shaped. The outer diameter of the first seat portion 31 is smaller than the inner diameter of the body portion 21 and larger than the inner diameter of the first reduced diameter portion 22. The upper surface 31a and lower surface 31b of the first seat portion 31 are inclined so as to gradually become thinner radially outward. The first shaft portion 32 extends perpendicular to the first seat portion 31 and is cylindrical. The first head portion 33 is continuous with the first shaft portion 32 and is cylindrical. A first hole portion 34 to which a fishing line is connected is formed in the first head portion 33. Approximately half of the tip side of the first head portion 33 and the first hole portion 34 are exposed to the outside. The outer diameter of the first head portion 33 is larger than the outer diameter of the first shaft portion 32. The outer diameter of the first head portion 33 is also slightly smaller than the inner diameter of the first reduced diameter portion 22.

[0018] The first ball bearing 13 is a bearing made up of a plurality of balls 35. The balls 35 are disposed between the upper surface 31a of the first pedestal portion 31 and the retaining surface 22b of the first reduced diameter portion 22. The retaining surface 22b is perpendicular to the central axis C and has a ring shape.

[0019] The second connecting portion 14 has a second head portion 41 formed continuously with the second reduced diameter portion 23. In other words, the second connecting portion 14 is formed integrally with the main body portion 11. The second head portion 41 is cylindrical and has a second hole portion 42 formed therein to which the fishing line is connected.

[0020] As shown in FIG. 2 , the first main contact portion 15 is a region where the inner circumferential surface 22a of the first reduced diameter portion 22 and the outer circumferential surface 33a of the first head portion 33 contact each other or face each other with a small gap. More specifically, approximately one-third of the base end of the first head portion 33 contacts the inner circumferential surface 22a of the first reduced diameter portion 22 or faces each other with a small gap. The inner circumferential surface 22a of the first reduced diameter portion 22 is cylindrical and extends parallel to the central axis C. A plating layer M1 is formed over the entire inner circumferential surface 22a of the first reduced diameter portion 22. A plating layer M2 is formed over the entire outer circumferential surface 33a of the first head portion 33.

[0021] The first ball contact portion 16 is a portion where the inner circumferential surface 21a of the body portion 21 and the outer circumferential surface 35a of the ball 35 contact each other or face each other with a small gap therebetween. The inner circumferential surface 21a of the body portion 21 is cylindrical and extends parallel to the central axis C. The inner diameter of the inner circumferential surface 21a of the body portion 21 is larger than the inner diameter of the inner circumferential surface 22a of the first reduced diameter portion 22.

[0022] Next, a method for manufacturing the swivel 1 according to this embodiment will be described. The method for manufacturing the swivel according to this embodiment includes a preparation step, an acid pickling step, an assembly step, and a plating step.

[0023] The preparation process is a process of forming each component. In the preparation process, as shown in FIG. 3, an intermediate main body portion 61, a lid portion 62, a first connecting portion 12, and a ball 35 are formed. That is, the main body portion 11 according to this embodiment is composed of two components, the intermediate main body portion 61 and the lid portion 62. The intermediate main body portion 61 includes a trunk portion 21, a second reduced diameter portion 23 (see FIG. 1), and a tapered portion 63. The tapered portion 63 is formed so as to reduce in diameter from the trunk portion 21 toward one end.

[0024] The lid portion 62 has a base end portion 64 and a tip end portion 65. The base end portion 64 is cylindrical, with a constant inner circumferential surface and an outer circumferential surface that tapers toward the tip. The tapered portion 63 is in surface contact with the outer circumferential surface of the base end portion 64. The tip portion 65 is cylindrical, with a constant inner circumferential surface and an outer circumferential surface that tapers toward the tip. The outer circumferential surface of the tip portion 65 and the outer circumferential surface of the tapered portion 63 are flush with each other. The inner circumferential surfaces of the base end portion 64 and the tip portion 65 form the inner circumferential surface 22a.

[0025] The pickling process involves subjecting each component to a pickling treatment. The pickling treatment for each component (substrate) is performed by immersing each component in an acidic solution such as sulfuric acid or hydrochloric acid for a predetermined period of time. The pickling treatment can remove impurities such as rust, burrs, oil, and dirt from each component. In addition to pickling, each component may be subjected to deburring using a barrel or the like (barrel processing), chemical polishing other than pickling, and / or other smoothing treatments. This pickling treatment and other smoothing treatments may be omitted.

[0026] The assembly process is a process of assembling each component. First, the first connection portion 12 and a plurality of balls 35 (first ball bearings 13) are placed inside the intermediate body portion 61. Next, the lid portion 62 is inserted from above the first head portion 33, and the intermediate body portion 61 and the lid portion 62 are fitted together. The intermediate body portion 61 and the lid portion 62 can be integrated by crimping the tapered portion 63 of the intermediate body portion 61.

[0027] The plating process is a process of plating the assembled assembly. In the plating process according to this embodiment, a fluororesin-containing plating layer is formed. In this embodiment, the assembled assembly is immersed in a plating solution, so that a plating layer is formed on the exposed outer surfaces of each component and on the first main contact portion 51. The fluororesin-containing plating layer is a composite plating layer obtained by dispersing and co-depositing fluororesin fine particles in a plating solution. For example, a nickel plating solution is used as the plating solution. The fluororesin contained in this fluororesin-containing plating layer is, for example, polytetrafluoroethylene (PTFE). The fluororesin-containing plating layer may include two layers: an electroless nickel plating layer formed by electroless nickel plating and an electrolytic nickel plating layer formed by electrolytic nickel plating. Forming the plating layer can smooth the outer and inner peripheral surfaces of each component, thereby reducing frictional resistance. It also prevents deterioration and rust.

[0028] The thickness of the electroless nickel plating layer is about 1 to 2 μm, and the thickness of the electrolytic nickel plating layer is also about 1 to 2 μm. The fluororesin-containing plating layer may be formed by mirror plating. Vanadium may be mixed into the plating solution used to form the fluororesin-containing plating layer. By mixing vanadium into the plating solution, the hardness of the formed plating layer can be improved.

[0029] The above manufacturing method is merely an example, and other manufacturing methods are also possible. For example, the assembly process may be performed after the plating process for each component. Furthermore, although polytetrafluoroethylene is used as an example of the fluororesin, other fluororesins may also be used.

[0030] In the swivel 1 manufactured as described above, for example, a fishing line is connected to the first hole 34 of the first connecting portion 12, and a fishing line is connected to the second hole 42 of the second connecting portion 14. The first connecting portion 12 rotates relative to the main body 11 about the central axis C, preventing the fishing line from twisting. Furthermore, the first ball bearing 13 allows the first connecting portion 12 to rotate smoothly. More specifically, the first ball bearing 13 is held axially by the first seat 31, while the first connecting portion 12 is held circumferentially by the first reduced diameter portion 22. This allows the first connecting portion 12 to rotate smoothly without wobbling in the axial and circumferential directions. Furthermore, the outer diameters of the first seat 31 and the first ball bearing 13 are larger than the inner diameter of the first reduced diameter portion 22, preventing the first connecting portion 12 from slipping out of the main body 11.

[0031] 2, in the swivel 1 according to this embodiment, plating layers M1, M2 containing fluororesin are formed on the inner circumferential surface 22a of the first reduced diameter portion 22 and the outer circumferential surface 33a of the first connecting portion 12 in the first main contact portion 15. This reduces frictional resistance in the first main contact portion 15, thereby improving rotation performance.

[0032] Furthermore, by using polytetrafluoroethylene as the fluororesin for the plating layers M1 and M2, the plating process can be carried out easily and inexpensively.

[0033] In this embodiment, a plating layer is formed on both the inner circumferential surface 22a of the first reduced diameter portion 22 and the outer circumferential surface 33a of the first connecting portion 12, but it may be formed on only one of them. Also, the plating layer may be formed only on the contacting portions, rather than on the entire surface.

[0034] [Modification of the first embodiment] 4 is an enlarged cross-sectional view of a modification of the first embodiment. In this modification, a plating layer is formed not only on the first main contact portion 15 but also on the first ball contact portion 16.

[0035] In the first ball contact portion 16, a plating layer M3 is formed on the inner circumferential surface 21a of the body portion 21. Furthermore, a plating layer M4 is formed on the outer circumferential surface 35a of the ball 35.

[0036] According to this modification, in the first ball contact portion 16, plating layers M3, M4 containing fluororesin are formed on the inner peripheral surface 21a of the trunk portion 21 and the outer peripheral surface 35a of the ball 35. This reduces frictional resistance in the first ball contact portion 16, thereby improving rotation performance. Furthermore, by forming plating layers M3, M4 on the first ball contact portion 16 in addition to plating layers M1, M2 on the first main contact portion 15, frictional resistance can be reduced synergistically.

[0037] [Second embodiment] Next, a swivel 1A according to a second embodiment of the present invention will be described. The swivel 1A according to this embodiment differs from the first embodiment in that both the first connecting portion 12 and the second connecting portion 114 rotate relative to the main body 111.

[0038] The swivel 1A according to this embodiment includes a main body 111, a first connecting portion 12, a first ball bearing 13, a second connecting portion 114, a second ball bearing 113, a first main contact portion 15, a first ball contact portion 16, a second main contact portion 115, and a second ball contact portion 116. The first connecting portion 12, the first ball bearing 13, the first main contact portion 15, and the first ball contact portion 16 are generally the same as those in the first embodiment.

[0039] The main body 111 includes a trunk 121, a first reduced diameter section 22, and a second reduced diameter section 123. The trunk 121 has the largest diameter and is formed with a constant diameter. The first reduced diameter section 22 is formed so that its diameter gradually decreases from the trunk 121 toward one end. The second reduced diameter section 123 is formed so that its diameter gradually decreases from the trunk 121 toward the other end. The hollow section 124 is a hollow portion provided inside the main body 111.

[0040] The second connecting portion 114 is disposed in the hollow portion 124, with its tip exposed to the outside on the other end side. In other words, the second connecting portion 114 is disposed facing the opposite direction to the first connecting portion 12. The second connecting portion 114 includes a second seat portion 131, a second shaft portion 132, and a second head portion 133. The second seat portion 131 is disk-shaped. The upper surface 131a and the lower surface 131b of the second seat portion 131 are inclined so as to gradually become thinner radially outward. The second shaft portion 132 extends perpendicular to the second seat portion 131 and is cylindrical. The second head portion 133 is continuous with the second shaft portion 132 and is cylindrical. A second hole portion 134 to which a fishing line is connected is formed in the second head portion 133. Approximately half of the tip side of the second hole portion 134 and the second head portion 133 are exposed to the outside. The outer diameter of second head portion 133 is larger than the outer diameter of second shaft portion 132. In addition, the outer diameter of second head portion 133 is slightly smaller than the inner diameter of second reduced diameter portion 123.

[0041] The second ball bearing 113 is a bearing made up of a plurality of balls 135. The balls 135 are disposed between the lower surface 131b of the second pedestal portion 131 and the holding surface 123b of the second reduced diameter portion 123. The holding surface 123b is perpendicular to the central axis C and has a ring shape.

[0042] As shown in FIG. 6 , the second main contact portion 115 is a region where the inner circumferential surface 123a of the second reduced diameter portion 123 and the outer circumferential surface 133a of the second head portion 133 contact each other or face each other with a small gap. More specifically, approximately one-third of the base end of the second head portion 133 contacts the inner circumferential surface 123a of the second reduced diameter portion 123 or faces each other with a small gap. The inner circumferential surface 123a of the second reduced diameter portion 123 is cylindrical and extends parallel to the central axis C. A plating layer M11 is formed over the entire inner circumferential surface 123a of the second reduced diameter portion 123. A plating layer M12 is formed over the entire outer circumferential surface 133a of the second head portion 133.

[0043] The second ball contact portion 116 is a portion where the inner circumferential surface 121a of the body portion 121 and the outer circumferential surface 135a of the ball 135 face each other. The inner circumferential surface 121a of the body portion 121 is cylindrical and extends parallel to the central axis C. The inner diameter of the inner circumferential surface 121a of the body portion 121 is larger than the inner circumferential surface 123a of the second reduced diameter portion 123.

[0044] Next, a method for manufacturing the swivel 1A according to this embodiment will be described. The method for manufacturing the swivel according to this embodiment includes a preparation step, an acid pickling step, an assembly step, and a plating step.

[0045] Although specific illustrations are omitted, in the preparation step, an intermediate body portion and two lid portions are prepared. In the first embodiment, a lid portion was provided only on one end side, but in this embodiment, a lid portion is provided on each side of the intermediate body portion. The pickling step, assembly step, and plating step are also performed in substantially the same manner as in the first embodiment, and detailed explanations thereof will be omitted.

[0046] In the swivel 1A manufactured as described above, for example, a fishing line is connected to the first hole 34 of the first connecting portion 12 and a fishing line is connected to the second hole 134 of the second connecting portion 114. The first connecting portion 12 and the second connecting portion 114 are rotatable relative to the main body 111 around the central axis C, preventing the fishing line from twisting. Furthermore, the first ball bearing 13 and the second ball bearing 113 allow the first connecting portion 12 and the second connecting portion 114 to rotate smoothly. More specifically, the second ball bearing 113 is held axially by the second seat 131, while the second connecting portion 114 is held circumferentially by the second reduced diameter portion 123. This allows the second connecting portion 114 to rotate smoothly without wobbling in the axial and circumferential directions. Furthermore, the outer diameters of the second seat 131 and the second ball bearing 113 are larger than the inner diameter of the second reduced diameter portion 123, preventing the second connecting portion 114 from slipping out of the main body 111.

[0047] Furthermore, the swivel 1A according to this embodiment can achieve the same effects as the first embodiment at the first connecting portion 12. Furthermore, as shown in Fig. 6, in the second main contact portion 115, plating layers M11, M12 containing fluororesin are formed on the inner circumferential surface 123a of the second reduced diameter portion 123 and the outer circumferential surface 133a of the second connecting portion 114. This reduces frictional resistance at the second main contact portion 151, thereby improving rotation performance.

[0048] Moreover, since the first seat portion 31 and the second seat portion 131 are both thinner toward the radially outward side, the contact area between the first seat portion 31 and the second seat portion 131 is smaller, which reduces the frictional resistance between the first connecting portion 12 and the second connecting portion 114 and improves rotation performance.

[0049] In this embodiment, a plating layer is formed on both the inner circumferential surface 123a of the second reduced diameter portion 123 and the outer circumferential surface 133a of the second connecting portion 114, but it may be formed on only one of them. Also, the plating layer may be formed only on the contacting portions, rather than on the entire surface.

[0050] Also in the second embodiment, a plating layer may be formed on the second ball contact portion 116 in addition to the second main contact portion 115. That is, a plating layer may be formed on either the inner circumferential surface 121a of the body portion 121 or the outer circumferential surface 135a of the ball 135.

[0051] In addition, in this embodiment, the main body portion 111 is composed of a total of three components: an intermediate main body portion and two lid portions; however, the main body portion 111 may also be composed of a total of two components: an intermediate main body portion and one lid portion. [Explanation of symbols]

[0052] 1 swivel 11 Main body 12 First connection part 13 First Ball Bearing 14 Second connection part 15 First contact part 16 First ball contact area 21 Torso 21a Inner surface 22 First reduced diameter section 22a Inner surface 23 Second reduced diameter section 24 Hollow part 31 First pedestal part 32 First shaft part 33 First head 33a Outer surface 34 First hole 35 balls 35a Outer surface 111 Main body 113 Second ball bearing 114 Second connection part 115 Second contact part 116 Second ball contact part C center axis M1 plating layer M2 plating layer M3 plating layer M4 plating layer

Claims

1. a main body portion having a hollow portion formed therein; a first connection portion provided at one end of the main body portion so as to be rotatable relative to the main body portion around the axial direction, and to which one fishing line is connected; a first ball bearing installed between a first seat portion of the first connecting portion and the main body portion; a second connecting portion to which the other fishing line is connected at the other end of the main body, A swivel characterized in that, in a first contact portion where the inner peripheral surface of the main body portion and the outer peripheral surface of the first connecting portion are in contact, a plating layer containing a fluororesin is formed on at least one of the inner peripheral surface of the main body portion and the outer peripheral surface of the first connecting portion.

2. 2. The swivel according to claim 1, wherein a plating layer containing a fluororesin is formed on at least one of the inner circumferential surface of the main body and the outer circumferential surface of the ball at a first ball contact portion where the inner circumferential surface of the main body and the ball of the first ball bearing come into contact.

3. 2. The swivel according to claim 1, wherein the fluororesin of the plating layer is polytetrafluoroethylene.

4. a main body portion having a hollow portion formed therein; a first connection portion provided at one end of the main body portion so as to be rotatable relative to the main body portion around the axial direction, and to which one fishing line is connected; a first ball bearing installed between a first seat portion of the first connecting portion and the main body portion; a second connecting portion provided at the other end of the main body portion so as to be rotatable relative to the main body portion around the axial direction, and to which the other fishing line is connected; a second ball bearing installed between the second seat portion of the second connection portion and the main body portion, a plating layer containing a fluororesin is formed on at least one of the inner circumferential surface of the main body and the outer circumferential surface of the first connection portion in a first main contact portion where an inner circumferential surface of the main body and an outer circumferential surface of the first connection portion are in contact with each other; A swivel characterized in that, in a second main contact portion where the inner peripheral surface of the main body portion and the outer peripheral surface of the second connecting portion are in contact, a plating layer containing a fluororesin is formed on at least one of the inner peripheral surface of the main body portion and the outer peripheral surface of the second connecting portion.

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