JP4345407B2 - Shaft cylinder - Google Patents

Description

The present invention relates to a shaft body made of a soft member having an elastic action and having a grip having a hollow portion mounted on a shaft cylinder.
Furthermore, it provided with means for fixing the ends of the grip to a plurality of the barrel to form the barrel, by relatively rotating the barrel and grip, the axial tube provided with means for maintaining the deformed shape of the grip .

2. Description of the Related Art Many shafts having a grip made of a soft member have been known for writing instruments and the like. These grips have been pursued for ease of gripping from the viewpoints of hardness, surface condition, shape, and the like.
However, the grip by the soft member is generally fixed to the shaft cylinder, and there is a limit to satisfy all the needs due to the variation of the user such as the size and preference of the hand to be gripped.
On the other hand, studies have been made to move the grip in the longitudinal direction or partially extend the grip by rotating the shaft tube, and some have been commercialized.

Japanese Patent Publication No. 7-20752 JP-A-7-323688 JP 2000-313193 A

By using a soft member for the grip, slight elastic deformation of the grip due to gripping contributes to ease of gripping. However, since it is easily elastically deformed, it may cause problems such as looseness in the fixing portion of the shaft cylinder and the grip, idle rotation of the grip with respect to the shaft cylinder, and the like.
Furthermore, in the shaft body provided with means for rotating the grip relative to the shaft cylinder and maintaining the rotational deformation, deformation occurs at the fixed portion between the grip and the shaft cylinder, and the like May cause bugs.

According to the present invention, in a shaft cylinder equipped with a grip having a hollow portion made of a soft member , the shaft cylinder includes a front shaft cylinder and a rear shaft cylinder, and the front shaft cylinder and the rear shaft cylinder are rotatable. A plurality of holes are formed on the front inner surface of the grip, a plurality of protrusions to be inserted into the holes are formed on the front shaft cylinder, and a plurality of holes are formed on the rear end surface of the grip. A hollow portion made of a soft member is formed by forming a plurality of protrusions to be inserted into the holes in the rear shaft cylinder, and further sandwiching the grip by the rear shaft cylinder and the front shaft cylinder. In the shaft cylinder equipped with the grip , the shaft cylinder includes a front shaft cylinder and a rear shaft cylinder, and the front shaft cylinder and the rear shaft cylinder are rotatably engaged with each other on the front inner surface of the grip. Form multiple holes and the holes A plurality of protrusions to be inserted is formed in the front shaft barrel, also, a plurality of holes in the rear end portion of the grip, or a plurality of projections, formed in the direction perpendicular to the longitudinal direction of the shaft body, The second gist is that this hole, or a protrusion or hole that engages with the protrusion, is formed in the rear shaft cylinder, and prevents defects such as deformation of the grip relative to the shaft cylinder and idle rotation as much as possible. It is an object.

According to the present invention, in a shaft cylinder equipped with a grip having a hollow portion made of a soft member , the shaft cylinder includes a front shaft cylinder and a rear shaft cylinder, and the front shaft cylinder and the rear shaft cylinder are rotatable. A plurality of holes are formed on the front inner surface of the grip, a plurality of protrusions to be inserted into the holes are formed on the front shaft cylinder, and a plurality of holes are formed on the rear end surface of the grip. A hollow portion made of a soft member is formed by forming a plurality of protrusions to be inserted into the holes in the rear shaft cylinder, and further sandwiching the grip by the rear shaft cylinder and the front shaft cylinder. In the shaft cylinder equipped with the grip , the shaft cylinder includes a front shaft cylinder and a rear shaft cylinder, and the front shaft cylinder and the rear shaft cylinder are rotatably engaged with each other on the front inner surface of the grip. Form multiple holes and the holes A plurality of protrusions to be inserted is formed in the front shaft barrel, also, a plurality of holes in the rear end portion of the grip, or a plurality of projections, formed in the direction perpendicular to the longitudinal direction of the shaft body, Since the second gist is that the hole or the projection or hole engaging with the projection is formed in the rear shaft cylinder , the grip and the shaft cylinder are prevented from being loosened or idled as much as possible.
Further, in the shaft body provided with means for rotating the grip relative to the shaft cylinder and maintaining the rotational deformation, deformation at the fixing portion between the grip and the shaft cylinder, idle rotation, etc. are prevented as much as possible. .

The best mode for carrying out the invention will be described with reference to FIGS. The shaft cylinder includes a rear shaft cylinder 1, a middle shaft cylinder 6, and a front shaft cylinder 5. The rear shaft cylinder 1 and the middle shaft cylinder 6 are coupled so as not to be able to rotate while sandwiching the engaging step 2d of the grip 2 and so as not to fall off in the longitudinal direction. The middle shaft cylinder 6 and the front shaft cylinder 5 are coupled so as to be relatively rotatable about the central axis of the shaft cylinder as a rotation center but are not detachable in the longitudinal direction.
A plurality of longitudinally extending protrusions 5a are formed in front of the front shaft cylinder 5, and the cross sections formed on the front inner side of the grip 2 are substantially the same shape holes 2a. Has been inserted. These protrusions 5a and holes 2a are formed in four radial positions in this example, but are not limited to this, and may be three, five, or one place. It is preferable that there are about four places. In addition, 5e is formed in the front-end | tip of the said protrusion 5a, and it becomes easy to insert in the hole 2a.
Further, a front end 3 is attached to the front end of the front shaft cylinder 5, and the front end 3 is detachably mounted by a screw mechanism.

On the other hand, a plurality of cross-sectional protrusions 1a extending in the longitudinal direction of the shaft cylinder are formed in front of the rear shaft cylinder 1 and formed on the rear end face 2f of the grip 2. Each cross section is inserted into a hole 2b having substantially the same shape as the protrusion 1a. A diameter-reduced portion 6g is provided at the rear of the middle shaft cylinder 6, and a rear flat portion 6e is formed at two locations opposed to the diameter-reduced portion 6g. Further, a projection 6c having a diameter larger than that of the reduced diameter portion 6g is provided on the arc-shaped side surface of the reduced diameter portion 6g. Furthermore, a large-diameter outer diameter portion 6f is formed at the connecting portion between the central shaft cylinder 6 and the reduced diameter portion 6g, and the locking step portion 6b is formed by forming the outer diameter portion 6f. . Further, a flat surface 1c corresponding to the flat portion 6e formed in the middle shaft tube 6 and a large diameter portion 1d corresponding to the protruding portion 6c are formed in the front inner side of the rear shaft tube 1.
A diameter-reduced portion is formed on the inner rear side of the grip 2, and a locking step portion 2d is formed by forming the diameter-reduced portion.
With these configurations, the middle shaft cylinder 6 and the rear shaft cylinder 1 cannot rotate due to the engagement between the flat portion 6e and the flat portion 1c, and the large-diameter projection portion 6c of the middle shaft tube 6 The rear shaft large-diameter portion 1d corresponding thereto is coupled so as not to fall off in the longitudinal direction of the shaft tube. At the same time, the inner locking step portion 2d and the rear end surface 2f of the grip 2 are tightly fitted to each other by the locking step portion 6b of the middle shaft tube 6 and the front end surface 1b of the rear shaft tube 5, thereby rearward of the grip 2. Also, it is coupled to the middle shaft cylinder 6 (and the rear shaft cylinder 1) so as not to rotate and to prevent it from dropping off in the longitudinal direction.

A diameter-reduced portion 5f is formed on the rear outer surface of the front shaft cylinder 5, and a plurality of protrusions 5b having an arc-shaped cross section extending in the longitudinal direction are formed on the entire circumference of the diameter-reduced portion 5f. On the other hand, a groove 6a having an arc-shaped cross section is formed on the entire inner circumference and in the longitudinal direction on the front inner surface of the middle tube 6. The number of the protrusions 5b of the front shaft cylinder 5 and the number of grooves 6a of the middle shaft cylinder 6 are the same, and the protrusions 5b and the grooves 6a are engaged with each other.
With the above configuration, when the front shaft cylinder 5 and the middle shaft cylinder 6 are relatively rotated, the protrusion 5b rotates while getting over the groove 6a. At this time, the grip 2 deformed by the rotation tries to be restored, but the rotational deformation shape of the grip is maintained because the engagement force between the protrusion 5b and the groove 6a is large. Further, a rotation restricting portion 5 d is provided behind the protrusion 5 b of the front shaft cylinder 5, and the rotation restricting portion 5 d can abut on a rotation restricting portion provided behind the groove 6 a of the middle shaft cylinder 6. It is like that. That is, by restricting the relative rotation angle between the front shaft cylinder 5 and the middle shaft cylinder 6, significant rotational deformation of the grip 2 is restricted and damage or the like is prevented.
In the process in which the grip 2 is rotationally deformed or in a deformed state, the grip 2 tries to restore the rotational deformation. However, the engagement between the hole 2a of the grip 2 and the protrusion 5a of the front shaft cylinder 5 and the above-described grip The rotationally deformed shape is maintained by the combination of the rear 2, the middle shaft cylinder 6 and the rear shaft cylinder 1.

  A first embodiment of the present invention will be described with reference to FIGS. A plurality of holes 2c that are substantially orthogonal to the longitudinal direction of the shaft tube are formed on the side surface of the reduced diameter portion 2g covered by the rear shaft tube 1 at the rear of the grip 2. On the other hand, at the rear of the middle shaft tube 6 Is formed with a protrusion 6d that engages with the hole 2c. That is, the middle shaft cylinder 6 is coupled to the rear rear shaft 1 so as not to rotate and to prevent it from dropping off in the longitudinal direction while being engaged with the hole 2c of the grip 2. Further, the latching step 6 b of the middle barrel 6 and the front end surface 1 c of the rear barrel 1 are a latching step 2 d formed on the rear inner side of the grip 2 and a latching step on the rear outer side of the grip 2. 2h is sandwiched between them. Since the configuration other than the above is the same as that of the above-described best embodiment, the description thereof is omitted.

FIG. 8 shows a grip used in the second embodiment of the present invention. A plurality of holes 2e extending substantially parallel to the longitudinal direction of the shaft cylinder are formed on the rear inner surface of the grip 2 in the same manner as the front inner surface, and the holes 2e are formed at the rear of the middle shaft cylinder 6. Is engaged with the protrusion. Since the configuration other than the above is the same as the best embodiment, the description thereof is omitted.
Although the plurality of holes 2e of the grip 2 in this example are closed on the rear side thereof, the rear end may be in an open state, that is, a through-hole in consideration of moldability.

  Although various examples for rotating and deforming the grip have been described above, the present invention may be applied to a general grip mounting structure, that is, a shaft tube in which the front shaft tube and the middle shaft tube do not rotate relatively. .

The longitudinal cross-sectional view which shows the best form of this invention. AA sectional view taken on the line AA of FIG. FIG. 3 is a sectional view taken along line BB in FIG. 1. The principal part disassembled perspective view of FIG. 1 is a longitudinal sectional view showing Example 1. FIG. The CC sectional view taken on the line of FIG. The principal part disassembled perspective view of FIG. FIG. 3 is an exploded perspective view showing a main part of a second embodiment. The external view of FIG. 1 and FIG. The external view which shows an operation example.

DESCRIPTION OF SYMBOLS 1 Back axis | shaft cylinder 1a Protrusion 1b Front end surface 1c Flat part 1d Large diameter part 2 Grip 2a Independent hole 2b Independent hole 2c Independent hole 2d Engagement step part 2e Independent hole 2f Rear end surface 2g Reduced diameter part 2h Engagement step part 3 Lead metal 4 Knock 5 Front shaft cylinder 5a Independent protrusion 5b Locking protrusion 5c Locking step part 5d Rotation restricting part 6 Middle shaft cylinder 6a Locking groove 6b Flat part 6c Locking step part 6d Independent protrusion 6e Flat part 6f Large diameter part 6g Diameter portion 7 Cursive body 8 Cam cylinder 9 Rotor 10 Slider 11 Clip 12 Front elastic member 13 Rear elastic member

Claims (4)

In a shaft cylinder equipped with a grip having a hollow portion made of a soft member, the shaft cylinder is composed of a front shaft cylinder and a rear shaft cylinder, and the front shaft cylinder and the rear shaft cylinder are rotatably engaged, A plurality of holes are formed on the front inner surface of the grip, a plurality of protrusions to be inserted into the holes are formed on the front shaft cylinder, and a plurality of holes are formed on the rear end surface of the grip. A shaft cylinder characterized in that a plurality of protrusions to be inserted are formed in a rear shaft cylinder, and the grip is sandwiched between the rear shaft cylinder and the front shaft cylinder . 2. The shaft cylinder according to claim 1, wherein the plurality of holes or the plurality of protrusions are formed in a direction substantially parallel to a longitudinal direction of the shaft cylinder . In a shaft cylinder equipped with a grip having a hollow portion made of a soft member, the shaft cylinder is composed of a front shaft cylinder and a rear shaft cylinder, and the front shaft cylinder and the rear shaft cylinder are rotatably engaged, A plurality of holes are formed in the front inner surface of the grip, a plurality of protrusions inserted into the holes are formed in the front shaft cylinder, and a plurality of holes or a plurality of protrusions are formed at the rear end portion of the grip. A shaft cylinder formed in a direction perpendicular to the longitudinal direction of the shaft body, and a protrusion or hole engaging with the hole or the protrusion is formed in the rear shaft cylinder . The protrusion formed on the outer surface of the front shaft cylinder and the groove formed on the inner surface of the rear shaft cylinder are freely rotatable, and the protrusion of the front shaft cylinder and the groove of the rear shaft cylinder are engaged and disengaged. , barrel according to any one of claims 1 to 3, characterized in that to maintain and release the rotation of the front shaft cylinder and the rear shaft tube.

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