JP6866186B2 - Grip mounting structure - Google Patents

Description

The present invention relates to a grip mounting structure in which a grip is mounted on a grip portion of a barrel.

Conventionally, in this type of invention, for example, as described in Patent Document 1, an annular recess whose diameter is reduced on the front side of the step portion is provided at the grip portion on the front side of the barrel body, and the recess is provided. A cylindrical grip (grip member) made of an elastic material is attached in an annular shape, a ring-shaped stopper is fitted on the front side of the grip in the recess, and the tip of the mouth is screwed on the front side of the stopper in the barrel body. There is a shaft cylinder of a writing tool that is connected together and is designed to solve the problem that the grip comes off or shifts when the tip of the mouth is removed to replace the cursive.

Japanese Unexamined Patent Publication No. 2003-21890 Japanese Unexamined Patent Publication No. 2011-98503

However, according to the above-mentioned prior art, a gap may be formed between the rear end of the grip and the step portion, or the front end side of the grip may bulge due to dimensional variation, writing pressure when the grip is gripped, or the like. May be done.
Therefore, it is conceivable that the grip is formed to be long in advance and the rear end of the grip is pressed against the step portion. In this case, the rear end side of the grip is in the out-diameter direction due to the pressure contact force. There is a risk of swelling or curling.
Therefore, for example, in the invention described in Patent Document 2, the space between the rear end of the grip and the step portion is covered with a decorative ring, but a simpler structure is desired.

In view of such problems, the present invention has the following configurations.
In a grip mounting structure in which a grip is annularly mounted on a grip portion of a shaft cylinder, the shaft cylinder includes a front shaft and a rear shaft connected to the front shaft, and the grip is an elastic cylinder made of an elastic material. A portion and a hard portion made of a hard material and integrated on the inner diameter side of the elastic cylinder portion are provided, and the hard portion is sandwiched between the front and rear ends of the elastic cylinder portion so as to project inward in diameter. A portion is provided, and the front shaft is provided with a pressure contact portion that is pressed from the front side with respect to the hard held portion without being pressure-welded from the front side to the elastic cylinder portion, and the rear shaft is provided with a pressure contact portion. A pressure contact portion is provided which is pressed from the rear side to the hard held portion without being pressed against the elastic cylinder portion from the rear side, and the held portion is sandwiched from the front and back by the both pressure contact portions. Grip mounting structure characterized by being

Since the present invention is configured as described above, it is possible to prevent a gap, swelling, or the like from occurring on the rear end side or the front end side of the grip.

It is a vertical cross-sectional view which shows an example of the grip mounting structure which concerns on this invention. In the figure, (a) is a side view showing an example of a shaft cylinder, and (b) is a cross-sectional view taken along the lines (b)-(b) of (a). It is a half cross-sectional view which shows an example of a grip. An example of the grip is a plan view seen from the rear side in the axial direction. In the figure, (Va) is a cut end view along the (Va)-(Va) line in FIG. 3, and (Vb) is a cut end view along the (Vb)-(Vb) line in FIG.

In this embodiment, the following features are disclosed.
The first feature is that in a grip mounting structure in which a grip is annularly attached to a grip portion of a shaft cylinder, the shaft cylinder includes a front shaft and a rear shaft connected to the front shaft, and the grip is provided. An elastic cylinder portion made of an elastic material and a hard portion made of a hard material and integrated on the inner diameter side of the elastic cylinder portion are provided, and the hard portion is located between the front and rear ends of the elastic cylinder portion. , A sandwiched portion that is sandwiched from the front and back by the front shaft and the rear shaft is provided.

As a second feature, the hard portion is provided with the sandwiched portion so as to project in the inward direction (see FIGS. 1 and 3).

As a third feature, the rear shaft is concentrically screwed and connected to the front shaft, and the front shaft is provided with a pressure contact portion that is pressure-welded to the sandwiched portion from the front side. The rear shaft is provided with a pressure contact portion that is pressed against the sandwiched portion from the rear side, and the sandwiched portion is sandwiched from the front and rear by both pressure contact portions (see FIG. 1).

As a fourth feature, the hard portion is formed in a tubular shape having a shorter axial length than the elastic tubular portion, and is arranged on the latter half side of the elastic tubular portion (see FIG. 3).

As a fifth feature, the elastic cylinder portion has a thick portion that is thicker than the rear side portion and has an inner diameter smaller than the outer diameter of the hard portion on the front side of the front end of the hard portion ( (See FIGS. 1 and 3).

As a sixth feature, the elastic cylinder portion has an annular inclined portion on the rear end side or the front end side of the outer peripheral surface, which gradually reduces the outer diameter toward the end end (see FIGS. 1 and 3).

As a seventh feature, the elastic cylinder portion has an annular covering portion on the rear end side that projects annularly in the inward direction and covers the rear end surface of the hard portion.
The outer peripheral portion of the rear shaft is provided with a step portion that contacts the rear end surface of the annular covering portion with the grip mounted in an annular shape (see FIG. 1).

As an eighth feature, a clip that partially protrudes in the radial direction in the circumferential direction is provided on the rear end side of the shaft cylinder, and the outer peripheral surface of the elastic cylinder portion has a partial circumferential curvature. Three small gripped surfaces are provided at equal intervals in the circumferential direction, and the clip is arranged between two of the three gripped surfaces at a corresponding circumferential position with the hard portion. One of the shaft cylinders is provided with a ridge extending in the front-rear direction, and the other is provided with a concave groove that fits the ridge (see FIGS. 1 and 4).

Further, in the embodiment described later, an independent invention in which only the following constituent requirements are indispensable is also disclosed.
That is, one of the present inventions is that in a grip mounting structure in which a grip is annularly attached to a grip portion of a shaft cylinder, the grip is made of an elastic material and the elastic cylinder portion is made of a hard material. It is provided with a hard portion integrated on the inner diameter side, and the hard portion is formed in a tubular shape having an axial length shorter than that of the elastic tubular portion, and is arranged on the latter half side of the elastic tubular portion. The elastic tubular portion has a thick portion on the front side of the front end of the hard portion, which is thicker than the rear side portion and has an inner diameter smaller than the outer diameter of the hard portion (see FIG. 1).

Further, as another invention, in a grip mounting structure in which a grip is annularly mounted on a grip portion of a shaft cylinder, the grip is made of an elastic material and an elastic cylinder portion is made of a hard material, and the inner diameter of the elastic cylinder portion is formed. The elastic tubular portion is provided with a rigid portion integrated on the side, and the elastic tubular portion has an annular covering portion on the rear end side that projects annularly in the inward direction and covers the rear end surface of the hard portion. The outer peripheral portion of the cylinder is provided with a step portion that comes into contact with the rear end surface of the annular covering portion with the grip attached in an annular shape (see FIG. 1).

Further, as another invention, in a grip mounting structure in which a grip is annularly mounted on a gripping portion of a barrel, the rear end side of the barrel partially projects outward in the radial direction. Clips are provided, and on the outer peripheral surface of the elastic cylinder portion, three gripped surfaces having a partially small curvature in the circumferential direction are provided at equal intervals in the circumferential direction, and the clips are provided with three clips. Arranged between two of the gripping surfaces at corresponding circumferential positions, one of the rigid portion and the barrel is provided with a ridge extending in the front-rear direction, and the other is fitted into the ridge. Fitting recesses are provided (see FIGS. 1 and 3).

<Specific embodiment>
Next, a specific embodiment having the above characteristics will be described in detail with reference to the drawings.
In the present specification, the axial direction means the direction in which the center line of the shaft cylinder extends. Further, "front" means a direction in which the writing portion (lead core) protrudes on one side in the axial direction. Further, "rear" means the side in the opposite direction to the one side. Further, the "diameter direction" means a direction orthogonal to the axial direction. Further, the "out-diameter direction" means a direction away from the axis along the radial direction. The "inner diameter direction" means a direction approaching the axis along the radial direction.

FIG. 1 shows an example of a writing instrument to which the grip mounting structure according to the present invention is applied.
The writing tool 1 includes a shaft cylinder 10, a lead core guard 20 supported by the foremost end of the shaft cylinder 10, a knock rod 30 protruding rearward from the rear end of the shaft cylinder 10, and the inside of the shaft cylinder due to the advancement and retreat of the knock rod. It is a mechanical pencil equipped with a lead lead feeding mechanism (not shown) for feeding the lead core x forward and a grip 40 attached to a grip portion on the front end side of the barrel. It constitutes structure A.

The axle cylinder 10 includes a front shaft 11 and a rear shaft 12 that is inserted into the rear end side of the front shaft 11 and is concentrically screwed and connected.

As shown in FIG. 1, the front shaft 11 is formed in a substantially cylindrical shape, has a tapered tip 11a on the front end side thereof, and has a reduced diameter portion 11b on the rear outer peripheral surface of the tip 11a. ..
The outer peripheral surface on the rear side of the reduced diameter portion 11b functions as a grip fitting surface for fitting the front side of the grip 40.
The rear end surface of the front shaft 11 functions as a pressure contact portion 11e that is pressure-contacted from the front side with respect to the held portion 42b of the hard portion 42, which will be described later.

A short cylindrical ring member 13 is fitted in an annular shape on the front end side of the reduced diameter portion 11b. The ring member 13 has an annular inward projecting portion 13a projecting inward in diameter on the front end side thereof, and the inner peripheral surface of the annular inward projecting portion 13a is formed on the outer peripheral surface of the reduced diameter portion 11b of the front shaft 11. Loosely fitted. Therefore, the ring member 13 is rotatable with respect to the front shaft 11.
Further, the rear end side of the ring member 13 is separated from the outer peripheral surface of the reduced diameter portion 11b in the outer diameter direction, and the front end side of the grip 40 is inserted into this gap (see FIG. 1).

A female screw portion 11d for screwing and connecting the rear shaft 12 is formed on the inner peripheral surface on the rear end side of the front shaft 11.

Further, as shown in FIG. 2, the rear shaft 12 has a small diameter portion 12a located on the front side, a medium diameter portion 12b whose diameter is expanded on the rear side of the small diameter portion 12a, and the medium diameter portion 12b. Also has a large diameter portion 12c that is further expanded on the rear side.
A clip 12d (see FIG. 1) is provided on the rear end side of the rear shaft 12 so as to project outward from a predetermined position in the circumferential direction.

The small diameter portion 12a has a male screw portion 12a1 screwed into the female screw portion 11d in the front shaft 11 on the front end side of the outer peripheral surface thereof.
When the rear shaft 12 is screwed into the front shaft 11, the male screw portion 12a1 and the female screw portion 11d have a rear end of the front shaft 11 (pressure contact portion 11e) and a ridge 12a2 front end (pressure contact portion 12a21) described later. The screw length, the front-rear position, and the like are appropriately set so that the distance W between the two is narrower than the front-rear width of the sandwiched portion 42b of the grip 40.

Further, the small diameter portion 12a is on the outer peripheral surface thereof on the outer peripheral surface on the rear side of the male screw portion 12a1 and on the outer peripheral surface on the rear side of the rear end portion of the front shaft 11 to be screwed in the outward direction. It has a ridge 12a2 (see FIG. 2) that protrudes and extends backward.

As shown in FIG. 2B, a plurality of ridges 12a2 are provided at intervals in the circumferential direction, and according to the illustrated example, three ridges 12a2 are provided at substantially equal intervals.
Each of the ridges 12a2 has a protruding end surface formed in a convex curved surface shape along the circumferential direction of the barrel, and is continuously connected to the middle diameter portion 12b in a straight line to the rear.
The front end surface of each ridge 12a2 functions as a pressure contact portion 12a21 that is pressure-welded to the sandwiched portion 42b from the rear side.

The medium diameter portion 12b is formed in a cylindrical surface shape having substantially the same diameter as the protrusion in the outer diameter direction of the protrusion 12a2. The middle diameter portion 12b is provided with an annular protrusion 12b1 in the middle of the front-rear direction. The annular protrusion 12b1 gets over and fits the protrusion 42c1 on the rear end side of the inner peripheral surface of the grip 40.

The large diameter portion 12c is formed in a cylindrical shape having an outer diameter larger than that of the small diameter portion 12a and the medium diameter portion 12b.

Further, when an excessive radial force is applied through the lead core x, the lead core guard 20 slides forward in contact with the front end opening of the shaft cylinder 10 to cover and protect the lead core x. Note that in FIG. 1, the configuration in which the lead core guard 20 is held in the barrel 10 is omitted.

The knock rod 30 is engaged with the shaft cylinder 10 so as to advance and retreat by a predetermined amount, and its rear end portion protrudes from the rear end of the shaft cylinder 10. The front end side of the knock rod 30 is connected to a lead core feeding mechanism (not shown).

Although not shown, the lead core feeding mechanism may be any as long as it sequentially feeds the lead core x by knocking the knock rod 30.
Specific configurations such as the lead core guard 20, the knock rod 30, and the lead core feeding mechanism can be applied, for example, those disclosed in Japanese Patent Application Laid-Open No. 2015-123689.

As shown in FIG. 3, the grip 40 is double-molded (called two-color molding) on the inner diameter side and the latter half side of the elastic cylinder portion 41 made of an elastic material and the elastic cylinder portion 41 made of a hard material. It is provided with a hard portion 42 integrated by (may be).

The elastic cylinder portion 41 is formed in a cylindrical shape straddling between the front shaft 11 and the rear shaft 12 on the front half side of the shaft cylinder 10 (see FIG. 1). The elastic cylinder portion 41 is formed of an elastic synthetic resin material such as an elastomer resin.
The elastic cylinder portion 41 has a thick portion 41a on the front side of the front end of the hard portion 42, which is thicker than the rear side portion and has an inner diameter smaller than the outer diameter of the hard portion 42 (see FIG. 3). ), A diameter-reduced portion 41b whose outer diameter is reduced with respect to the thick-walled portion 41a is provided on the front side of the thick-walled portion 41a.

The thick portion 41a is formed in a substantially cylindrical shape in which the outer diameter is gradually increased toward the front. The inner peripheral surface of the thick portion 41a is in contact with and fitted to the reduced diameter portion 11b on the rear end side of the front shaft 11 (see FIG. 1).
On the front end side of the outer peripheral surface of the thick portion 41a, an annular inclined portion 41a1 whose outer diameter is gradually reduced toward the foremost end portion is provided. According to the illustrated example, the annular inclined portion 41a1 has a C chamfered inclined surface, but may be formed in an R chamfered shape.

Further, a reduced diameter portion 41b is provided on the front side of the annular inclined portion 41a1.
The reduced diameter portion 41b is inserted between the inner peripheral surface of the ring member 13 and the outer peripheral surface of the reduced diameter portion 11b on the rear side of the front shaft 11 to prevent the elastic cylinder portion 41 from curling on the front end side.

The portion of the elastic cylinder portion 41 on the rear side of the thick portion 41a is a thin portion 41c having a thickness smaller than that of the thick portion 41a.
The outer diameter of the outer peripheral surface of the thin portion 41c gradually decreases toward the rear. An annular inclined portion 41c1 having a convex curved surface in cross section is provided on the rear end side of the outer peripheral surface of the thin portion 41c so that the outer diameter is gradually reduced toward the rearmost end portion.

The inner peripheral surface of the thin portion 41c is formed in a cylindrical shape having a diameter larger than that of the inner peripheral surface of the thick portion 41a, and the cylindrical hard portion 42 is integrated so as to fit the inner peripheral surface. There is.

An annular covering portion 41c2 is provided on the rearmost end side of the thin-walled portion 41c so as to project in an annular direction in the inward direction and cover the rear end surface of the hard portion 42.
The rear end surface of the annular covering portion 41c2 is in contact with the step portion 12c1 which is the front end surface of the large diameter portion 12c of the rear shaft 12. Further, the inner peripheral surface of the annular covering portion 41c2 is close to or in contact with the outer peripheral surface of the small diameter portion 12a of the front shaft 11.

Further, on the outer peripheral surface of the elastic cylinder portion 41, three gripped surfaces 41d having a partially small curvature in the circumferential direction are provided at equal intervals in the circumferential direction.
The circumferential positions of these three gripped surfaces 41d are determined so as to have a specific positional relationship with respect to the clip 12d.
More specifically, as shown in FIG. 4, the clip 12d is arranged at the corresponding circumferential position between the two gripped surfaces 41d.
According to this arrangement, with the clip 12d facing outward so as not to touch the hand, the three gripped surfaces 41d are gripped by the three fingers of the thumb, index finger, and middle finger, respectively, to take a writing posture. Can be done.

As shown in FIG. 4, each gripped surface 41d has a convex curved surface shape having a smaller curvature than the other portion 41e in the circumferential direction, and has an inclined surface shape that gradually expands its diameter toward the front and expands its area. Is formed in.
That is, the contour of the cross section of the other portion 41e is a perfect circle along the outer peripheral surface of the barrel 10, and the contour of the cross section of each gripped surface 41d is a curved surface having a curvature smaller than that of the perfect circle. ..

The front-rear range having the three gripped surfaces 41d may be the entire range from the front end of the thick portion 41a to the rear end of the thin-walled portion 41c. It is also possible to form one gripped surface 41d and make the rear side a cylindrical surface, or form three gripped surfaces 41d only in the range from the middle portion to the front side of the thin portion 41c and make the rear side a cylindrical surface. Good. In particular, in the latter two aspects, it is possible to obtain a unique gripping feel that fits the fingertip only when the front side is gripped.
As a further example, it is also possible to form the entire range from the front end of the thick portion 41a to the rear end of the thin portion 41c into a cylindrical surface shape that does not have the gripped surface 41d.

Further, the hard portion 42 is formed in a substantially cylindrical shape having a shorter axial length than the elastic tubular portion 41 due to the hard synthetic resin material.
The hard portion 42 is located between the front and rear ends of the elastic cylinder portion 41, and is located closer to the latter half of the elastic cylinder portion 41 according to a particularly preferred example shown.
As shown in FIG. 3, on the inner peripheral surface of the hard portion 42, a concave groove 42a that fits into the ridge 12a2 of the rear shaft 12 and a front shaft 11 that protrudes inward in diameter on the front side of the concave groove 42a. A sandwiched portion 42b that is sandwiched from the front and rear by the rear shaft 12 and a tubular inner surface portion 42c that is located on the rear side of the concave groove 42a are formed.

The concave grooves 42a are grooves formed in a straight line extending in the front-rear direction on the cylindrical inner peripheral surface of the hard portion 42, and a plurality (three according to the illustrated example) are provided at equal intervals in the circumferential direction. ..
The circumferential positions of the concave groove 42a and the ridge 12a2 are defined so that the three gripped surfaces 41d and the clip 12d have the above-mentioned specific positional relationship (see FIG. 3B).
That is, the three gripped surfaces 41d are aligned in the circumferential direction by the fitting of the concave groove 42a and the ridge 12a2.

The sandwiched portion 42b is a protrusion that protrudes inward from the bottom of the concave groove 42a on the front side of the concave groove 42a.
The sandwiched portion 42b is provided in an annular shape on the front end side of the hard portion 42, and as shown in FIG. 1, the pressure contact portion 11e at the rear end of the front shaft 11 and the pressure contact portion at the front end of the ridge 12a2 in the concave groove 42a. It is sandwiched from the front and back by 12a21.

Further, the tubular inner surface portion 42c is a substantially cylindrical inner surface (see FIG. 3). The tubular inner surface portion 42c is provided with a plurality of protrusions 42c1 for overcoming and fitting the annular protrusions 12b1 at appropriate intervals in the circumferential direction.

Next, the characteristic action and effect of the writing tool 1 and the grip mounting structure A having the above configuration will be described.
When assembling the writing tool 1, the grip 40 is attached to the front end side of the rear shaft 12 in an annular shape.
At the time of this mounting, each ridge 12a2 on the rear shaft 12 side and each concave groove 42a on the grip 40 side are aligned and fitted in the circumferential direction. Further, the protrusion 42c1 on the inner peripheral surface on the rear end side of the grip 40 gets over the annular protrusion 12b1 of the rear shaft 12 and is fitted.

Then, a ring member 13 is preliminarily mounted on the rear side of the front opening portion 11a of the front shaft 11, and the front shaft 11 is inserted into the grip 40 from the front side and screwed and connected to the rear shaft 12.
In this connection work, since the ring member 13 is rotatable with respect to the front shaft 11, the rotation on the front shaft 11 side is transmitted to the elastic cylinder portion 41 to prevent the elastic cylinder portion 41 from being twisted and deformed. be able to.

Then, by the screwing operation, the distance W between the rear end of the front shaft 11 (press contact portion 11e) and the front end of the ridge 12a2 (press contact portion 12a21) is narrowed, the sandwiched portion 42b is sandwiched between them, and the grip 40 is held. It does not move in the front-back direction and the rotation direction.

Since the grip 40 is accurately positioned and fixed between the front shaft 11 and the rear shaft 12 as described above, a gap may be formed on the rear side or the front side of the elastic cylinder portion 41, or the front end of the elastic cylinder portion 41 may be formed. The side part and the part near the rear end are compressed and are hard to swell.

In particular, during writing, the gripped grip 40 is strongly pushed forward by the writing pressure, but even in such a case, the portion near the front end of the front shaft 11 swells or a gap is left on the rear side of the front shaft 11. It can be prevented from occurring.

Further, even if the front-rear end side of the grip 40 slightly bulges in the out-of-diameter direction, this bulge can be made inconspicuous by the front-rear annular inclined portions 41a1, 41c1.

Further, it is possible to prevent the rear end portion of the grip 40 from being rolled up in the out-of-diameter direction by the annular covering portion 41c2 facing in the in-diameter direction.

Moreover, the three gripped surfaces 41d can be supported at three points by the thumb, index finger, and middle finger so that the clip 12d does not touch the hand, and the thick portion 41a provides good elasticity and gripping feel. Can be done.

According to the above embodiment, as a particularly preferable example, the sandwiched portion 42b is arranged on the front end side of the hard portion 42, but as another example, the sandwiched portion 42b is located closer to the center of the rigid portion 42 in the axial direction or rearward. It is also possible to place it near the edge.

Further, according to the above embodiment, the hard portion 42 is formed in a cylindrical shape as a particularly preferable example, but as another example, the hard portion 42 is partially provided in a cylindrical shape other than the cylindrical shape or in the axial direction of the shaft cylinder. It is also possible to have a shape other than the cylindrical shape, such as the above-mentioned aspect.

Further, according to the above embodiment, the sandwiched portion 42b is provided on the front end side of the hard portion 42, but as another example, the hard portion 42 is located closer to the center of the sandwiched portion 42b in the axial direction or after the hard portion 42. It can also be provided on the end side.
As yet another example, the entire hard portion 42 can be sandwiched from the front and rear by the front shaft 11 and the rear shaft 12.

Further, according to the above embodiment, the ridges 12a2 are provided on the shaft cylinder 10 side and the concave grooves 42a are provided on the grip 40 side, but as another example, this unevenness relationship is reversed and the shaft cylinder 10 side is provided. It is also possible to provide a concave groove and provide a ridge on the grip 40 side.

Further, in the above embodiment, the grip mounting structure A is applied to a mechanical pencil, but as another example, it is also possible to apply the grip mounting structure A to a writing tool other than a mechanical pencil, such as a ballpoint pen or felt-tip pen.

Further, the present invention is not limited to the above-described embodiment, and can be appropriately changed without changing the gist of the present invention.

1: Writing tool 10: Shaft cylinder 11: Front shaft 11e: Pressure welding part 11d: Female screw part 12: Rear shaft 12a1: Male screw part 12a2: Protrusion 12a 21: Pressure welding part 12c1: Step part 12d: Clip 40: Grip 41: Elastic Cylindrical part 41a1: Ring-shaped inclined part 41c1: Ring-shaped inclined part 41d: Grasping surface 42: Hard part 42b: Holding part A: Grip mounting structure

Claims (8)

In the grip mounting structure in which the grip is mounted in an annular shape on the grip portion of the barrel,
The axle includes a front shaft and a rear shaft connected to the front shaft.
The grip includes an elastic cylinder portion made of an elastic material and a hard portion made of a hard material and integrated on the inner diameter side of the elastic cylinder portion.
The hard portion is provided with a sandwiched portion that projects inward in diameter between the front and rear ends of the elastic cylinder portion.
The front shaft is provided with a pressure contact portion that is pressure-welded from the front side to the hard held portion without being pressure-contacted from the front side to the elastic cylinder portion, and the elastic cylinder portion is provided on the rear shaft. A pressure-welded portion that is pressure-welded from the rear side to the hard held portion without being pressure-welded from the rear side is provided.
The gripped portion has a grip mounting structure characterized in that the sandwiched portion is sandwiched from the front and back by both pressure contact portions. The hard portion is formed in a tubular shape having a shorter axial length than the elastic tubular portion, and is arranged on the latter half side of the elastic tubular portion.
The grip mounting structure according to claim 1, wherein the sandwiched portion is provided on the frontmost end side of the hard portion. A ridge extending in the front-rear direction is provided on the outer peripheral surface of the rear shaft, and a concave groove that fits the ridge is provided on the inner peripheral surface of the hard portion.
The grip mounting structure according to claim 1 or 2, wherein the front end surface of the ridge functions as the pressure contact portion that is pressed against the sandwiched portion from the rear side. An annular protrusion is provided on the outer peripheral surface of the rear shaft on the rear side of the protrusion.
The grip mounting structure according to claim 3, wherein a protrusion that rides over and fits the annular protrusion rearward is provided on the inner peripheral surface of the hard portion. The front shaft is inserted into the grip from the front side and screwed to the rear shaft.
A ring member is annularly fitted to the front shaft so as to cover the front end side of the grip.
The grip mounting structure according to any one of claims 1 to 4, wherein the ring member is rotatable with respect to the front shaft. The elastic cylinder portion has a thick portion on the front side of the front end of the hard portion, which is thicker than the rear side portion and has an inner diameter smaller than the outer diameter of the hard portion. The grip mounting structure according to any one of 1 to 5. The elastic cylindrical portion, the rear side or front side of the outer peripheral surface, have a circular inclined portion to reduce gradually the outer diameter toward the top end,
The elastic cylinder portion has an annular covering portion that projects annularly in the inward direction on the rear end side and covers the rear end surface of the hard portion.
Any one of claims 1 to 6, wherein a step portion that comes into contact with the rear end surface of the annular covering portion is provided on the outer peripheral portion of the rear shaft with the grip mounted in an annular shape. Described grip mounting structure. On the rear end side of the barrel, a clip that partially protrudes in the radial direction in the circumferential direction is provided.
On the outer peripheral surface of the elastic cylinder portion, three gripped surfaces having a partially small curvature in the circumferential direction are provided at equal intervals in the circumferential direction.
The clip is gripping the mounting structure according to claim 1 to 7 any one of claims, characterized in that it is arranged to circumferential position corresponding to between two of the three the object gripping surface.

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