JP7655875B2 - Fishing spinning reel - Google Patents

Description

The present invention relates to a fishing spinning reel that provides good sliding guidance for the spool shaft that is inserted into the pinion gear.

A fishing spinning reel is equipped with a pinion gear that is rotated by rotating the handle, a rotor that is fixed to the outer periphery of the pinion gear and rotates together with the pinion gear, and a spool located at the front of a spool shaft that is inserted inside the pinion gear so that it can move back and forth. When the handle of such a fishing spinning reel is rotated, the pinion gear is rotated and the spool shaft slides axially along the inner surface of the pinion gear.

As mentioned above, the spool shaft on which the spool is mounted is arranged to move back and forth inside the pinion gear, so it is preferable that good sliding guidance be obtained between the two. For example, as disclosed in Patent Document 1, it is known that the pinion gear is supported so that a gap is created between the outer surface of the spool shaft and the inner surface of the pinion gear so that the spool shaft can slide stably inside the pinion gear, thereby improving the sliding properties of the spool shaft. Patent Document 1 also discloses a configuration in which a recess (microhole) for oil storage is formed on the surface of the spool shaft, reducing sliding resistance while maintaining the applied oil.

JP 2021-132556 A

In the above-mentioned configuration, micro-holes are formed on the surface of the spool shaft and oil is stored in these holes, improving lubrication, but if burrs or foreign matter get in between the spool shaft and the pinion gear, the surface of the spool shaft will be scratched. In other words, the micro-holes only store oil, and if burrs or foreign matter continue to exist on the surface where no micro-holes are formed, this will cause damage to the surface of the spool shaft. Furthermore, if such burrs or foreign matter remain on the surface of the spool shaft, they can cause defects such as abnormal noise, rough rotation, and heavy rotation. Thus, although the conventional technology has the idea of storing oil to improve sliding properties, it does not take into consideration the problems caused by burrs and foreign matter adhering to the surface of the spool shaft.

The present invention was made with the above-mentioned problems in mind, and aims to provide a fishing spinning reel that prevents burrs and foreign matter from adhering to the surface of the spool shaft that reciprocates back and forth.

In order to achieve the above object, the present invention provides a fishing spinning reel that includes a pinion gear that is driven to rotate by rotating a handle attached to the reel body and that stops a rotor having a fishing line guide unit from rotating so that the rotor can rotate together with the pinion gear, a spool shaft that is inserted inside the pinion gear so that it can move back and forth, and a spool that is attached to the front end of the spool shaft and moves back and forth together with the spool shaft by rotating the handle, and that winds a fishing line onto the spool that moves back and forth via the fishing line guide unit of the rotating rotor by rotating the handle. The pinion gear and the spool shaft are arranged so that a gap G is formed between them, and the surface of the spool shaft has a continuous recess formed over 360° when viewed from the axial direction.

In the fishing spinning reel having the above-mentioned configuration, the spool shaft moves back and forth inside the rotating pinion gear during fishing line winding operation. The pinion gear and the spool shaft are arranged so that a gap G is formed between them, so that the spool shaft slides smoothly and moves back and forth stably. In this case, burrs, foreign matter, etc. may be mixed into the gap G between them, but by forming a recess on the surface of the spool shaft continuously over 360° as viewed from the axial direction, the burrs, foreign matter, etc. are guided when the spool shaft moves back and forth, and can be reliably guided and trapped in the recess. As a result, burrs, foreign matter, etc. do not adhere to the surface of the spool shaft, and defects such as abnormal noise, rough rotation, and heavy rotation are less likely to occur.
The recess in the present invention includes a structure that is recessed in a specific shape and a structure that extends in a groove shape.

The present invention provides a fishing spinning reel that does not allow burrs or foreign matter to adhere to the surface of the spool shaft as it reciprocates back and forth.

1 is a side view showing an example of a fishing spinning reel according to the present invention, illustrating an internal configuration. FIG. FIG. 2 is an enlarged view of the main part of FIG. 1 . FIG. 2 is an enlarged view of a portion where the pinion gear and the spool shaft shown in FIG. 1 are inserted; 1A is an enlarged view of a spool shaft, and FIG. 1B is a cross-sectional view taken along line A-A in FIG. 6A to 6D are diagrams showing modified examples of recesses formed on the surface of a spool shaft. 6A to 6C are diagrams showing configuration examples in which the recesses are formed as depressions. 6A to 6C are diagrams showing configuration examples in which the recesses are formed as grooves. FIG. 4A is a cross-sectional view along the axial direction showing an example of a recess; FIG. 4B is a cross-sectional view along a direction perpendicular to the axial direction showing an example of a recess;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a fishing spinning reel according to the present invention will be specifically described with reference to the accompanying drawings.
First, the structure of a fishing spinning reel will be described with reference to FIGS.

The reel body 1A of the fishing spinning reel (hereafter referred to as the reel) 1 according to this embodiment has a reel leg 2 that is attached to a fishing rod formed integrally therewith, and in front of that are arranged a rotatably supported rotor 3 and a spool 4 that is supported so that it can move back and forth in sync with the rotational motion of the rotor 3.

The rotor 3 has a pair of arms 3a (only one of which is shown in FIG. 1) that rotate around the spool 4, and a bail support member 3c to which the base end of a bail 3b is attached is supported at the front end of each arm 3a so that it can rotate freely between a fishing line winding position and a fishing line releasing position. One base end of the bail 3b is attached to a fishing line guide 3d that is integral with the bail support member 3c.

A handle shaft 5 is rotatably supported within the reel body 1, and a handle 6 is attached to its protruding end. A drive mechanism 10 is engaged with the handle shaft 5, and this drive mechanism 10 includes a drive gear 7 attached to the handle shaft 5 so as to be able to rotate together with it, and a pinion gear 8 having teeth 8a that mesh with the drive gear 7, extending in a direction perpendicular to the handle shaft 5, and having a hollow portion formed therein that extends in the axial direction.

The pinion gear 8 is rotatably supported within the reel body 1 by a pair of bearings 9a, 9b, the front and rear sides of which are fitted into the support of the reel body 1A. The pinion gear 8 also extends toward the spool 4, and the rotor 3 is fitted into the tip of the pinion gear 8 so as to be non-rotatable, and is attached to rotate integrally with the rotor 3 via a tightening nut 12.

A known one-way clutch 15 constituting a reverse rotation prevention mechanism is attached to the pinion gear 8 on the front side of the bearing 9b arranged in front of the toothed portion 8a. As is known, the one-way clutch 15 is equipped with an inner ring 15a, an outer ring 15b, which are fitted to the outer surface of the pinion gear 8 so as to prevent rotation, a plurality of rolling members 15c held between the inner ring 15a and the outer ring 15b, and a retainer 15d which holds the rolling members 15c. The one-way clutch 15 is engaged with the retainer 15d, and is operated by rotating a switching operation lever 16 provided on the outside of the reel body 1A, thereby preventing the rotation (reverse rotation) of the handle 6 (rotor 3) in the fishing line payout direction.

A spool shaft 20, which extends in a direction perpendicular to the handle shaft 5 and has a spool 4 attached to its tip end, is inserted into a hollow portion (hollow portion formed by the inner peripheral surface 8A of the pinion gear 8) formed inside the pinion gear 8 so as to be capable of reciprocating in the axial direction. A known spool reciprocating device 40 for reciprocating the spool 4 (spool shaft 20) back and forth is engaged with the rear end of the spool shaft 20.

When a reel having this configuration is wound using the handle 6, the rotor 3 is rotated via the drive mechanism 10 and the spool 4 is reciprocated back and forth via the spool reciprocating device 40, so that the fishing line is evenly wound around the winding body 4a of the spool 4 via the fishing line guide 3d.

Next, with reference to Figures 2 and 3, we will explain the pinion gear 8 that is rotated and the spool shaft 20 that moves back and forth inside it.

The front part of the pinion gear 8 has a non-circular part formed with an oval cross section so that the rotor 3 can be fitted to it without rotating, and a male screw part is formed on the outer periphery of the non-circular part to screw in the tightening nut 12. In addition, a through hole 3f is formed in the central part (central base 3A) of the rotor 3 to fit into the non-circular part of the pinion gear 8 without rotating, and the rotor 3 is fixed to the pinion gear 8 by inserting the pinion gear 8 into this through hole 3f and tightening the nut 12. In other words, the through hole 3f formed in the central base 3A of the rotor 3 is fitted into the tip side of the pinion gear 8, and the rotor 3 is positioned in a state where it is abutted against the inner ring 15a of the one-way clutch 15, and the rotor 3 is fixed by tightening the nut 12 in this state.

The spool shaft 20, which is inserted into a hollow portion formed inside the pinion gear 8, is supported so as to avoid contact with the inner peripheral surface 8A of the pinion gear 8 as much as possible in order to reduce sliding resistance. In this embodiment, the spool shaft 20 is supported in the middle region of the pinion gear 8 so as to be in a non-contact state (a state in which a gap G is created between the inner peripheral surface 8A of the pinion gear 8 and the outer peripheral surface 20A of the spool shaft 20).

Specifically, the tip end of the spool shaft 20 is supported at a certain area in the axial direction by a support member 30 press-fitted into the tip end of the pinion gear 8. The rear end of the spool shaft 20 is supported at a certain area by contacting a collar 1B that is disposed in the frame 1b of the reel body 1A and rotatably supports the bearing 9a. As a result, the spool shaft 20 is supported such that a gap G is generated between the support member 30 and the collar 1B and the inner peripheral surface of the pinion gear 8.
The pinion gear 8 and the support structure for the spool shaft 20 inserted into the pinion gear 8 are not particularly limited. For example, small diameter portions may be formed on the front and rear ends of the pinion gear 8, and the spool shaft 20 may be supported by these portions, forming a gap G between the two support portions, or other suitable modifications may be made. Also, the spool shaft 20 may be supported without forming such a gap G.

A recess 21 is formed on the surface of the spool shaft 20. This recess is formed continuously over 360° when viewed from the axial direction. In this embodiment, the recess 21 is configured as a roughly elliptical depression whose major axis is perpendicular to the axial direction of the spool shaft, and is formed regularly along the circumferential direction while being shifted in the axial direction, as shown in Figures 3 and 4(a).

The recesses 21 formed adjacent to each other in the axial direction are arranged so that they partially overlap when viewed from the axial direction. As a result, as shown in FIG. 4(b), when the spool shaft 20 is viewed from the axial direction, the recesses are formed continuously over 360°.

The support structure for the spool shaft 20 as described above is arranged so that a gap G is created between the inner peripheral surface of the pinion gear 8, improving the sliding properties of the spool shaft 20 and allowing it to move back and forth stably.

In addition, burrs and foreign matter may get caught between the pinion gear 8 and the spool shaft 20. However, because the recesses 21 are formed continuously over 360° when viewed from the axial direction, the burrs and foreign matter are guided along the surface of the spool shaft by the back and forth movement of the spool shaft 20 and the rotation of the pinion gear 8, and can be reliably guided and trapped in one of the recesses formed continuously over 360°. This prevents burrs and foreign matter from remaining on the surface of the spool shaft 20, prevents abnormal noise and rough rotation, and makes it less likely that defects such as heavy rotation will occur.

In addition, because burrs and foreign matter are reliably guided into the recess, there is no need to machine the inside of the pinion gear 8 with high precision or perform deburring and finishing, making it possible to reduce the processing costs of the pinion gear. In addition, there is no need to configure the support structure for the pinion gear and spool shaft with high precision to prevent burrs, so the main body does not become larger or heavier, and costs can be reduced.

The recess 21 can be formed by cutting, forging, pressing, rolling, etc. In particular, by forming it by pressing or rolling, the surface of the spool shaft is work-hardened, improving durability.

In the above-mentioned arrangement relationship between the pinion gear and the spool shaft, if the depth of the recess 21 (in a configuration in which the depth varies, the depth at the deepest position) is D, it is preferable to configure it so that G>D. By making the gap G larger than the depth D of the recess in this way, there is no need to interpose a separate high-precision support member between the inner surface of the pinion gear, making it possible to reduce the size and weight of the main body as well as costs. In addition, by making the gap G larger, it is possible to reduce the bite of burrs, etc., so that scratches on the surface of the spool shaft and the inner surface of the pinion gear can be prevented and repairs can be reduced.

The recesses 21 formed on the surface of the spool shaft can be modified as appropriate in terms of shape, arrangement, arrangement pattern, etc.
5(a) to (d) are diagrams showing various configuration examples of recesses (illustrated as depressions) formed on the surface of the spool shaft.

The recesses formed on the surface of the spool shaft 20 may be regularly scattered as shown in the examples in Figure 5, or may be randomly scattered, as long as they are formed without interruption over 360° when viewed from the axial direction.

The configuration shown in FIG. 5(a) shows an example in which a large number of circular recesses 22A are arranged in rows inclined to the axial direction and formed to be parallel. The configuration shown in FIG. 5(b) shows an example in which a large number of elliptical recesses 22B are arranged in the circumferential direction and formed to be adjacent to each other in the axial direction. The configuration shown in FIG. 5(c) shows an example in which a large number of elliptical recesses 22C are arranged inclined to the axial direction and formed to be adjacent to each other in the axial direction with the directions of the ellipses facing in the opposite direction. The configuration shown in FIG. 5(d) shows an example in which a large number of circular recesses 22D are arranged in rows in the circumferential direction and formed to be parallel.

All of the recesses 22A to 22D are regularly formed in the same pattern, which makes processing easier and allows the processing cost to be reduced.
The recesses may be formed by, for example, shot blasting or barrel polishing, but depending on the surface roughness, minute burrs or foreign matter may get caught or get stuck between adjacent recesses, making it impossible to completely confine them within the recesses. For this reason, it is preferable to form the recesses intermittently, with the outer surface of the spool shaft being exposed flat between adjacent recesses.

It is preferable that the recesses formed on the surface of the spool shaft are not formed in opposing positions (diametric positions) on the front and back. In other words, by not forming recesses in opposing positions, it is possible to prevent a decrease in the strength of the spool shaft.

The recess 21 may be formed over the entire axial range of the spool shaft, or may be formed only in a part of it. For example, by forming it within the range where it slides against the support member 30 and collar 1B (the axial range where the gap G is formed), burrs and foreign matter can be reliably guided into the recess 21 when the spool shaft 20 reciprocates. In addition, by forming the recess in only a part of the axial direction, the processing time can be shortened and there is no need to perform special treatment on the surface of the spool shaft, making it possible to reduce the weight and cost of the spool shaft.

Figure 6 is a diagram showing an example of the shape of the recess 21 formed as a depression. As described above, the shape of the recess can be modified as appropriate, and for example, the opening shape may be rectangular (polygonal), as in the recess 21E shown in Figure 6(a). However, such a shape is prone to burrs at the edge portions, so it is preferable to make the shape surrounded by curved edges, such as an elliptical shape 21B (22C) or a circular shape 22A (22D) that is curved (R-shaped) so that the edge portions do not become corners, as shown in Figures 6(b) and (c). In addition, by making such a shape, burrs are less likely to occur, and there is no need to take measures such as repairs.

The recessed portion may be configured as a groove extending along the surface of the spool shaft 20 other than a depression.
7A to 7C are diagrams showing examples of shapes of the recess 21 formed as a groove.

The configuration shown in FIG. 7(a) shows an example in which groove 23A is formed to be inclined in a dogleg shape with respect to the axial direction, and multiple grooves are formed in parallel along the axial direction. The configuration shown in FIG. 7(b) shows an example in which multiple grooves 23B are formed in parallel along a circumference in a direction perpendicular to the axial direction. Each groove 23B has multiple branch grooves 23a, 23b that extend in the inclined direction and terminate, making it easier to guide burrs, foreign matter, etc. that move in the axial direction with the reciprocating motion of the spool shaft 20 into groove 23B. The configuration shown in FIG. 7(c) shows an example in which a spiral groove 23C is formed.

By configuring the recesses formed on the surface of the spool shaft with the grooves 23A, 23B, and 23C as described above, it is possible to reliably capture burrs and foreign matter and guide them into the grooves. In other words, burrs and foreign matter do not adhere to or remain on the surface of the spool shaft 20, preventing abnormal noise and rough rotation, and making it less likely that defects such as heavy rotation will occur.

The recess 21 may be formed to have different depths D depending on the location on the surface of the spool shaft. For example, as shown in FIG. 8(a) or FIG. 8(b), by configuring the recess 21 to have a deep portion 21a and a shallow portion 21b, when the recess 21 is formed by pressing or rolling, excess material 25 is formed at the boundary between the surface and the groove during processing. When such excess material 25 is formed, the contact portion with the pinion gear 8 can be made to be a point contact rather than a surface contact, which improves sliding properties. Also, by changing the depth D depending on the location where burrs are likely to occur, it is possible to suppress a decrease in strength.

When forming the recess 21, it is preferable to form the boundary between the wall constituting the recess and the surface of the spool shaft in an R-shape (arc-like shape). By making the boundary R-shaped, burrs and foreign matter are less likely to occur, and burrs and foreign matter that occur in the gap G are easily guided into the recess.

The recess 21 formed as described above also functions as a reservoir for oil adhering to the surface of the spool shaft 20, making it possible to reduce sliding resistance over a long period of time.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be modified in various ways.
In the present invention, it is sufficient that the recess 21 formed on the surface of the spool shaft is configured to be continuous over 360° in the circumferential direction as viewed from the axial direction, and other configurations are not limited. Therefore, various modifications are possible for the configuration of the reel body 1A, the drive mechanism 10, the spool reciprocating mechanism 40, etc., other than the configuration of the recess 21 on the surface of the spool shaft. In addition, the recess 21 described above may be configured by combining various shapes, or by combining a depression and a groove. For example, a recess of an appropriate shape may be formed depending on the position of the outer surface of the spool shaft.

1 Fishing spinning reel 1A Reel body 3 Rotor 4 Spool 6 Handle 8 Pinion gear 10 Drive mechanism 20 Spool shaft 21 Recesses 22A to 22D Recesses (dents)
23A to 23C: Recesses (grooves)

Claims (7)

a pinion gear that is rotationally driven by the rotation of a handle provided on the reel body and that has a rotor having a fishing line guide portion and that is fixed so as to be integrally rotatable with the rotor;
a spool shaft inserted inside the pinion gear so as to be movable back and forth;
a spool provided at a front end of the spool shaft and moved back and forth together with the spool shaft by rotating the handle;
In a fishing spinning reel in which a fishing line is wound around the spool that is moved back and forth through the fishing line guide of the rotating rotor by a rotational operation of the handle,
The pinion gear and the spool shaft are disposed so that a gap G is formed between them,
A recess is formed on the surface of the spool shaft without interruption over 360° when viewed in the axial direction ,
A fishing spinning reel characterized in that , when the depth of the recess is D, G>D is satisfied . a pinion gear that is rotationally driven by the rotation of a handle provided on the reel body and that has a rotor having a fishing line guide portion and that is fixed so as to be integrally rotatable with the rotor;
a spool shaft inserted inside the pinion gear so as to be movable back and forth;
a spool provided at a front end of the spool shaft and moved back and forth together with the spool shaft by rotating the handle;
In a fishing spinning reel in which a fishing line is wound around the spool that is moved back and forth through the fishing line guide of the rotating rotor by a rotational operation of the handle,
The pinion gear and the spool shaft are disposed so that a gap G is formed between them,
A recess is formed on the surface of the spool shaft without interruption over 360° when viewed in the axial direction,
The recess has a depth that varies depending on the position on the surface of the spool shaft. The fishing spinning reel according to claim 1 or 2, characterized in that the recess is formed in at least a portion of the area within the axial range in which the gap G is formed. The fishing spinning reel according to any one of claims 1 to 3, characterized in that the recessed portion has depressions formed in a scattered manner on the surface of the spool shaft. The fishing spinning reel according to any one of claims 1 to 4, characterized in that the recess has a groove extending along the surface of the spool shaft. The fishing spinning reel according to any one of claims 1 to 5, characterized in that the recess is formed in an R-shaped edge portion on the surface of the spool shaft. 2. The fishing spinning reel according to claim 1 , wherein the depth D of the recess varies depending on the position where the recess is formed on the surface of the spool shaft.

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