JP2585219Y2 - Reciprocating mechanism of fishing reel - Google Patents

Description

[Detailed description of the invention]

[0001]

In the present invention, a spiral groove is formed on a screw shaft, comprising a forward path and a return path formed with a lead angle, and a turn portion connecting the forward path and the return path in an arc shape.
An engaging piece that engages with the helical groove and moves along the helical groove as the helical shaft rotates around its own axis is provided. The present invention relates to a reciprocating operation mechanism of a fishing reel in which a movable member reciprocating in a direction is assembled to the screw shaft.

[0002]

2. Description of the Related Art Conventionally, a reciprocating mechanism configured as described above has been used for an oscillating mechanism of a spinning reel as disclosed in Japanese Utility Model Publication No. Hei 4-1806, or Japanese Utility Model Application Laid-Open No. Sho 62-148063. As disclosed in Japanese Unexamined Patent Publication (Kokai) No. H10-203, there is a type used for a level wind mechanism of a dual bearing reel.

[0003]

FIG. 9 shows a conventional engagement piece.
As shown in (a), the engaging portion 21A is formed in a tongue shape in a posture along the radial direction of the engaging piece 21 and the end of the engaging portion 21A on the screw shaft 22 side is formed as a spiral groove. A cutout surface 21B is formed by cutting out in an arc shape substantially matching the radius of curvature of the bottom surface of the turn portion 12T of 22A, and the side surface of the engagement portion 21A and the side wall of the spiral groove 22A are configured to be in contact with each other. Note that, as described above, the notch surface 21B of the engagement portion 21 is
In the case where the notch is formed so as to have a diameter corresponding to the radius of curvature of the bottom surface of the turn portion 12T, as shown in FIG.
Are formed into an arc surface based on a single axis.

However, when the notch surface 21B is formed into an arc surface based on a single axis which coincides with the axis X of the spiral groove 22A, the spiral groove 22A having a predetermined lead angle is used. 9 (b), the engaging piece 21 rotates in the direction of arrow F and engages with the spiral groove 22A, so that the engaging piece 21 is engaged with the axis X of the screw shaft 22. Since the apparent radius of curvature of the notch portion is smaller than the bottom diameter of the spiral groove 22A when viewed along the direction, the engaging portion 21A rises from the spiral groove 22A during driving, and the spiral groove 22A
From the engaging portion 21.
Each time A reaches the turn portion 12T, the notch surface 21B is displaced to a position close to the bottom surface, so that a rattling accompanying this operation occurs, and in any case, a smooth drive is impaired. I have. Incidentally, when the notch surface 21B is formed as described above and the curved surface of the notch surface 21B is formed so as to contact the bottom surface of the spiral groove 22A, as shown in FIGS. 9 (b) and 9 (c). Since only the corner of the notch surface 21B comes into contact with the spiral groove 22A, the posture of the engagement piece 21 is difficult to stabilize. Such inconvenience similarly occurs in the level wind mechanism of the dual bearing reel, and an appropriate improvement is desired. An object of the present invention is to rationally configure a mechanism for smoothly moving a movable member back and forth during rotation of a screw shaft regardless of the position of an engagement piece with respect to the screw shaft.

[0005]

A feature of the present invention is that a second arcuate surface having substantially the same radius of curvature as the radius of curvature of the bottom of the groove in the turn portion is provided in the engagement portion of the engagement piece with the spiral groove. And a first arc surface having a radius of curvature larger than the radius of curvature of the groove bottom surface. The operation and effect are as follows.

[0006]

When the engaging portion 12A of the engaging piece 12 is engaged with the spiral groove 11A as shown in FIGS. 1 and 2, the spiral groove 11A is moved outward as shown in FIGS. Irrespective of the return path, the first circular surface 12S having a larger radius of curvature than the second circular surface 12T comes into contact with the groove bottom. In the turn portion T shown in FIG. 8, the second arc surface 12T having a curvature radius substantially the same as the curvature radius of the groove bottom surface of the turn portion T contacts the groove bottom surface.
2 can be stabilized, and the engaging piece 1 can also be used when the engaging portion 12A moves between the forward path or the return path and the turn portion T.
No. 2 does not significantly displace in the direction of floating from the screw shaft 11 or in the direction of sinking only by changing the posture around the axis Y. That is, in the present invention, the arc-shaped surface of the engaging portion 12A conventionally formed on the basis of a single shaft center is changed to the forward path,
Surface contact with the bottom of the spiral groove 11A along the return path,
In addition, by forming the engagement portion 12A with a plurality of surfaces so as to be in close contact with the turn portion T, it is possible to suppress the occurrence of falling off as in the related art and to cause the displacement of the engagement piece 12 in the axial direction. The occurrence of rattling is suppressed, and the engagement portion 1
Since 2A is in surface contact with the bottom surface of the spiral groove 11A, the position and posture of the engagement piece 12 can be stably maintained.

[0007]

Therefore, regardless of the position of the engagement piece with respect to the screw shaft, whether the position is the forward path, the return path, or the turn portion, the mechanism for smoothly moving the movable member back and forth during rotation of the screw shaft is rationally constituted. It was done.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 7, a rotor 4 having a bail 3 and a spool 5 for winding fishing line are arranged at the front of a reel body 2 having a handle 1.
Gear 7 driven by a handle shaft 6 connected to the
, A winding drive system for transmitting the power from the pinion gear 8 to the rotor 4 via each of the cylindrical shafts 9 integrally formed with the pinion gear 8, and the input gear 10, the screw shaft 11, and the screw shaft from the pinion gear 8. 11 which engages with the helical groove 11 </ b> A, and a movable member 13 which supports the engagement piece 12.
A spinning reel is provided with a system for converting the motion into reciprocating motion by the respective oscillating mechanisms and transmitting the reciprocating motion to the spool shaft 14.

As shown in FIG. 3 to FIG.
Has a through hole 13A through which the screw shaft 11 is inserted, and a spool shaft 14
Are formed, and a hole 13C in a cylindrical inner surface for rotatably receiving the engagement piece 12 is formed.
A plate 15 for preventing the engaging piece 12 from dropping is fixed by tightening a screw 16, and the end of the engaging piece 12 has a longitudinal direction along the direction perpendicular to the axis of the engaging piece 12 (engaging). The plate 15 is provided with a pair of holding pieces 15A, 15A which are respectively engaged with annular grooves formed in the spool shaft 14. The engagement piece 12 is rotatably inserted into the hole 13C via the bush 17 with the attitude of the axis Y set so as to be orthogonal to the rotation axis X of the screw shaft 11. Engagement piece 12
A coil spring 18 for pressing the engagement piece 12 against the screw shaft 11 is provided between the coil spring 18 and the plate 15.

As shown in FIG. 8, the spiral groove 11A has a feed portion S composed of a forward path and a return path having a predetermined lead angle with respect to the screw shaft 11, and an end portion of each of the forward path and the return path. Are connected to each other in a circular arc shape. As shown in FIG. 8 (b), to set the groove width W _S of the feed section S in a thickness substantially matching values of the engaging portion 12A, FIG. 8
As shown in (b) and (c), the groove width W _{T of the} turn portion T is obtained.
_Is larger than the groove width W _S of the feed portion S, and
It is set to a value that maintains the state of contact with the inner surface of the groove when the posture of the engagement portion 12A is changed. Thereby, in the feed portion S, the engagement portion 12A is configured to maintain a state in which the engagement portion 12A is in close contact with the spiral groove 11A, and also in the turn portion T, the state in which the engagement portion 12A is in close contact with the groove 11A is maintained. When the screw shaft 11 is rotated and stopped, the relative positional relationship between the screw shaft 11 and the engagement piece 12 is prevented from being disturbed in the axial direction of the screw shaft 11 due to rattling or the like. Have been. Incidentally, the turn portion T is formed such that its groove width becomes maximum at a portion most protruding toward the shaft end, and the groove width becomes smaller toward a portion connected to the outward path and the return path.

As shown in FIGS. 1 to 4, the engaging portion 12A of the engaging piece 12 is formed in the shape of a tongue piece having a thickness reduced toward the tip. The end portion of the engaging portion 12A is in close contact with the bottom surface of the spiral groove 11A of the screw shaft 11 when viewed in the direction along the rotation axis X in each state engaged with the feed portion S of the spiral groove 11A. It is formed on the first circular arc surfaces 12S, 12S of the shape. Engaging part 1
When viewed in the direction along the rotation axis X in a state where the longitudinal direction of 2A is set in a posture parallel to a plane orthogonal to the rotation axis X,
A second arcuate surface 12T having a shape in which the end is in close contact with the bottom surface of the spiral groove 11A of the screw shaft 11 is formed. In the oscillating mechanism, when the engaging portion 12A of the engaging piece 12 is engaged with the spiral groove 11A, the spiral groove 11A corresponds to each of the forward path and the backward path regardless of whether the spiral groove 11A is the forward path or the backward path. The state in which the first circular surface 12S comes into contact with the bottom surface is reached. In the turn portion T, the entire surface of the second arc surface 12T comes into contact with the bottom surface, so that the engagement piece 12 is stabilized. Feeding section S
Also, when the engagement portion 12A moves between the turn portion T and the engagement portion 12A, the engagement piece 12 is largely raised in the direction of floating from the screw shaft 11 or in the direction of sinking only by changing the posture around the axis Y. It is configured not to be displaced. Engagement piece 12
In order to form the first and second arc surfaces 12S and 12T on the engaging portion 12A, the following steps are performed. The cutting is performed by feeding the engaging portion 12A set at an angle equal to the lead angle of the screw shaft 11 to a milling cutter (not shown) having the same diameter as the groove bottom surface of the screw groove 11A of the screw shaft 11A. First arc surface 12 having a radius of curvature larger than the radius of curvature of the groove bottom
Form S. The cutting is performed by feeding the engaging portion 12A set in a posture along the rotation plane of the milling cutter into the milling cutter,
A second arc surface 12T having a radius of curvature substantially equal to the radius of curvature of the groove bottom surface of the spiral groove 11A is formed. At both ends in the longitudinal direction of the engaging portion 12A, there are formed chamfered portions 12B which allow smooth operation of the engaging portion 12A. In the oscillating mechanism, the first arc surface 12S and the second arc surface 12T of the engagement portion 12A are generated by the urging force of the spring 18 when the screw shaft 11 rotates.
At the bottom of the spiral groove 11A and at the same time
The side surface of 2A is made to contact the side wall of the spiral groove 11A so as to suppress rattling in the direction of the rotation axis X and to operate smoothly.

[Other Embodiments] The present invention can be applied to a level winding mechanism of a dual bearing reel as shown in FIG. 10, for example, as shown in FIG. By forming the first arc surface and the second arc surface on the engagement portion of the mating piece,
The line guide of the level wind mechanism can be driven smoothly even under a situation in which a large tension acts on the winding of the fishing line so that the winding position is not deviated. In this embodiment, the movable member 13 is constituted by a thread guide.

In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a side view of an engagement piece.

FIG. 2 is a rear view of an engagement piece.

FIG. 3 is a cross-sectional view illustrating an engagement piece provided in a movable member.

FIG. 4 is a sectional view taken along line QQ in FIG. 3;

FIG. 5 is a vertical rear view of the center of the reel.

FIG. 6 is an exploded perspective view of a movable member and an engagement piece.

FIG. 7 is a longitudinal side view of a reel.

FIGS. 8A, 8B, and 8C are cross-sectional views showing a state in which an engaging portion engages with each part of the spiral groove.

9A is a view showing the shape of an engaging portion of a conventional engaging piece; FIG. 9B is a cross-sectional view showing a state in which the conventional engaging piece is engaged in a spiral groove; FIG. B) Cross-sectional view of line PP

FIG. 10 is a sectional view showing a structure of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Screw shaft 11A Helical groove 12 Engagement piece 12A Engagement part 12S 1st circular surface 12T 2nd circular surface 13 Movable member T Turn part X Rotation axis Y axis

Claims (1)

(57) [Scope of request for utility model registration] 1. A spiral groove (11A) comprising a forward path, a return path, and a turn portion (T) connecting the forward path and the return path in an arc shape formed with a lead angle on a screw shaft (11). The engaging piece (10) is formed and engaged with the spiral groove (11A), and moves along the spiral groove (11A) as the screw shaft (11) rotates around its own axis (X). 12)
Reciprocating operation of a fishing reel having a movable member (13) reciprocating in the direction of the axis (X) receiving the driving force from the engagement piece (12) attached to the screw shaft (11). A second arc having a radius of curvature substantially equal to a radius of curvature of a bottom surface of the groove in the turn part (T) in the engagement part (12A) of the engagement piece (12) with respect to the spiral groove (11A). A reciprocating operation mechanism for a fishing reel, comprising a surface (12T) and a first arc surface (12S) having a radius of curvature larger than the radius of curvature of the groove bottom surface.