JP2013014014A - Gripping member of writing material, and writing material equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such problems that a conventional writing material has a gripping member that is made by making a metal in a cylinder shape, whose internal diameter is determined to be constant by an axial diameter of an axial cylinder, incapable of corresponding to various axial diameters, and possibly making the gripping member too loose with respect to the axial cylinder or too tight to be inserted due to variation at production of the outer diameter of the axial cylinder or the internal diameter of the gripping member.SOLUTION: The gripping member of the writing material is attached to the gripping part of the axial cylinder of the writing material, is formed of hard materials, and includes a slit part continuously formed from the front end to the rear end of the gripping member.

Description

  The present invention relates to a gripping member attached to a gripping part of a writing instrument, and a writing instrument equipped with the gripping member.

2. Description of the Related Art Conventionally, a writing instrument in which a gripping member made of a hard material such as a metal or a hard resin material is attached to a grip portion of a shaft tube is well known. By using a gripping member made of this hard material, the design is improved. When a metal material is used, a high-quality gripping member is obtained, and when a hard resin material is used, an elastomer or the like is obtained. A grip member rich in color that is strong against swelling of the grip member due to hand oil that occurs in a soft material can be obtained.
An example of a gripping member made of such a hard material is described in Japanese Utility Model Laid-Open No. 1-132783 (Patent Document 1).

  Patent Document 1 discloses a metal cylinder member that has been knurled. When this cylindrical member is attached to the shaft cylinder of a writing instrument and used as a gripping member, an anti-slip effect when gripping is obtained by a large number of rhombus-shaped convex portions having end portions formed on the surface. It is done.

Japanese Utility Model Publication No. 1-132783

In the prior art described in Patent Document 1, since the metal is formed into a cylindrical shape as a gripping member, the inner diameter of the gripping member is fixed depending on the shaft diameter of the shaft tube, and can be used for various shaft diameters. could not. In addition to being unable to handle various shaft diameters, the gripping member may or may not be loose relative to the shaft tube due to variations in the outer diameter of the shaft tube and the inner diameter of the gripping member during production. There was a risk of things coming out.

  The present invention has been made in view of the above problems, and is a gripping member to be attached to a shaft tube of a writing instrument, and the gripping member is formed from a hard material and is formed into a cylindrical shape. The gist is that a slit portion formed continuously from the front end to the rear end of the gripping member is provided.

  The present invention is a gripping member to be mounted on a shaft cylinder of a writing instrument, and the gripping member is formed from a hard material and is formed into a cylindrical shape, and continuously formed from the front end to the rear end of the gripping member. Since the slit portion is provided, it is possible to provide a gripping member for a writing instrument that can cope with various shaft diameters.

It is an external view of the whole product of 1st Example. It is an external view at the time of rotating 180 degree | times to the circumferential direction from the state of FIG. It is a longitudinal cross-sectional view at the time of rotating 90 degrees right in the circumferential direction from the state of FIG. FIG. 4 is an enlarged view around a tip member in FIG. 3. It is the sectional view on the AA line of FIG. FIG. 6 is a partially enlarged view of FIG. 5. It is an external appearance perspective view of the axial cylinder main body 5 of 1st Example. It is an external appearance perspective view of the holding member 19 of 1st Example. It is a figure showing the mounting method (before mounting) of the holding member 19 to the axial cylinder main body 5. FIG. It is an external view of the whole product of 2nd Example. It is an external view at the time of rotating 180 degree | times to the circumferential direction from the state of FIG. It is a longitudinal cross-sectional view at the time of rotating 90 degrees right in the circumferential direction from the state of FIG. It is an external appearance perspective view of the axial cylinder main body 5 of 2nd Example. It is an external appearance perspective view of the holding member 19 of 2nd Example. It is an external view of the whole product of the modification of 2nd Example. FIG. 16 is an external view when rotated 180 degrees in the circumferential direction from the state of FIG. 15. It is the 1st modification of the slit part of the holding member 19. FIG. It is the 2nd modification of the slit part of the holding member 19. FIG. It is the 3rd modification of the slit part of the holding member 19. FIG. It is a 4th modification of the slit part of the holding member 19. FIG.

  The operation will be described. A gripping member to be attached to the shaft cylinder of a writing instrument, the gripping member being formed from a hard material and cylindrical, and a slit formed continuously from the front end to the rear end of the gripping member Therefore, the slit portion is expanded in the process of mounting the gripping member on the shaft tube and in the mounting state, and the diameter of the gripping member is increased. At the same time, the gripping member made of the hard material can be mounted with a diameter suitable for the shaft cylinder due to its elasticity (restoring force), and as a result, the gripping member of the writing instrument that can correspond to various shaft diameters. Can be provided.

In the present invention, the hard material means a hard material having elasticity, such as a metal material or a hard resin material.
Specific examples of the hard material include metal materials such as iron, stainless steel, aluminum alloy, brass, polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyethylene resin (PE), polypropylene resin ( PP), polystyrene resin (PS), acrylonitrile styrene resin (AS), acrylonitrile styrene butadiene resin (ABS), methacryl resin (PMMA), polyacetal resin (POM), polyamide resin (PA), polycarbonate resin (PC), polyethylene terene Although hard resin materials, such as a terephthalate resin (PET), are mentioned, not only this example but if it is a hard material which has elasticity (restoring force), it can use suitably.

  A first embodiment of the present invention will be described with reference to FIGS. In addition, below, the front member 4 side mentioned later is called the front, and the press member 15 side is called back. In this embodiment, the present invention is developed on a mechanical pencil. The present invention is not limited to a mechanical pencil, and can be applied to various writing instruments such as a ballpoint pen, a marker pen, a fountain pen, and a brush pen.

The shaft cylinder 1 includes a stainless steel pipe 2 at the front, a tip member 4 in which a core holding member 3 is press-fitted and fixed, and a shaft cylinder body 5 that is detachably screwed to the rear end of the tip member 4. A core feeding mechanism 6 is arranged inside the shaft cylinder 1 constituted by these. In this embodiment, the tip member 4 is made of metal. However, the present invention is not limited to this, and the tip member 4 can be made of any material.
In the lead feeding mechanism 6 of the present embodiment, a chuck body 7 for gripping and releasing the lead L is disposed in front of the shaft cylinder 1, and the chuck body 7 is a chuck for opening and closing the chuck body 7. The ring 8 is inserted in an enclosed state. A lead tank 9 that accommodates the lead L is press-fitted and fixed behind the chuck body 7. A press-fit fixing portion of the lead tank 9, that is, the front of the lead tank 9 is a reduced diameter portion 10, and a step portion 11 is formed on the outer peripheral surface of the lead tank 9 by the reduced diameter portion 10. . On the other hand, a step portion 12 is also formed on the front inner peripheral surface of the shaft cylinder main body 5. Between the step portion 11 of the core tank 9 and the step portion 12 of the shaft cylinder main body 5, an elastic member (coil spring) 13 that urges the core feeding mechanism 6 to the rear of the shaft cylinder 1 is stretched. Yes.
An eraser 14 and a pressing member 15 are detachably attached to the rear end of the lead tank 9 of the lead feeding mechanism 5. Reference numeral 16 denotes a metal clip attached to the upper part of the shaft cylinder main body 5. The clip 16 is fitted in a recess 17 formed at the rear of the shaft cylinder body 5.

A diameter-reduced portion (gripping portion) 18 is formed in the front portion of the shaft cylinder body 5, and a metal cylindrical gripping member 19 is attached to the diameter-reduced portion 18. In this embodiment, the shaft cylinder body 5 is made of acrylonitrile styrene butadiene resin (ABS). However, the present invention is not limited to this, and the shaft cylinder body can be made of any material.
The reduced diameter portion 18 of the shaft cylinder body 5 will be described in detail. A plurality of elliptical convex portions (elliptical convex portions 20) are formed on the surface of the reduced diameter portion 18. More specifically, the elliptical convex portions 20 are arranged at six locations at equal intervals in the circumferential direction of the reduced diameter portion 18 (elliptical convex portion group), and the elliptical convex portion group is an axis of the shaft cylinder. Four places are arranged at equal intervals in the direction. In any elliptical convex portion 20, the side surface of the elliptical convex portion is tapered so that the outer shape of the elliptical convex portion 20 expands from the top portion to the reduced diameter portion of the axial tube body 5 (tapered portion). 21) The intersection of the elliptical convex part 20 and the reduced diameter part 18 of the shaft cylinder body 5 is formed from a corner (FIGS. 5 and 6). Since the vicinity of the corner of the elliptical convex portion 20 is thinner than the vicinity of the top, the weak portion 22 is easily deformed when an external force is applied. For this reason, when the gripping member 19 is mounted, the weak portion 22 (near the corner) is crushed and fixed so that the gripping member 19 bites into the barrel body 5. FIG. 6 is a partially enlarged view of the cross-sectional view when the mounting is completed. A dotted line portion in the drawing is the weak portion 22 (near the corner) before deformation. As a result, rotation of the gripping member 19 in the circumferential direction with respect to the barrel body 5 is more reliably prevented, and displacement in the axial direction is prevented, so that the gripping member can be securely fixed. it can. In addition, the shape of the intersection of this elliptical convex part 20 and the diameter-reduced part 18 of the axial cylinder main body 5 is not restricted to the said corner | angular part, It can be set as various shapes. For example, it is good also as a curved-surface part convex to the internal diameter direction of a shaft cylinder.
Further, a circumferential protrusion 23 is formed in the front portion of the reduced diameter portion 18 of the shaft cylinder body 5, and this circumferential protrusion 23 becomes a step-over step when the gripping member 19 is mounted. ing. Further, the rear portion of the reduced diameter portion 18 of the shaft cylinder body 5 is formed in a corrugated shape (shaft tube side corrugated portion 24).

Next, the cylindrical holding member 19 made of the metal will be described in detail.
The gripping member 19 of the present embodiment is formed with a plurality of elliptical through holes (elliptical through holes) 25, and the size and position of the elliptical through holes 25 are elliptical convexities formed in the shaft cylinder body 5. It is formed so as to engage with the portion 20.
The rear end portion of the gripping member 19 is formed in a corrugated shape (the gripping member side corrugated portion 26), and the shape thereof is a shape corresponding to the shaft tube side corrugated portion 24.
Further, the gripping member 19 is formed with a slit portion 27 continuous from the front end portion to the rear end portion. The slit portion 27 is formed along the axial direction of the shaft cylinder, and is formed in a straight line having a uniform width from the front end portion to the rear end portion.
In the present embodiment, the plate thickness (thickness) of the metal gripping member 19 is such that the gripping member has elasticity and has elasticity (restoring force) that can be securely attached to the shaft tube. Although it is good, the thickness of about 0.1 mm to 2.0 mm is desirable. The reason is that in the case of a metal gripping member, if it is thinner than 0.1 mm, sufficient elasticity cannot be obtained, and the fixing force when attached to the shaft tube becomes weak, and the circumferential direction of the shaft tube is reduced. On the other hand, there is a possibility that looseness is likely to occur, and when it is thicker than 2.0 mm, the slit portion is difficult to expand, and the efficiency during assembly is reduced. Note that the plate thickness is preferably about 0.1 mm to 2.0 mm, not only for the metal gripping member but also for the hard resin gripping member. The reason for this is that in the case of a gripping member made of hard resin, if it is thinner than 0.1 mm, resin flow failure is likely to occur during molding, and there is a risk that the productivity will be lowered and the appearance may be impaired. If it is thicker than 0.0 mm, the plate thickness is so thick that sink marks or the like are likely to occur during molding, and the appearance may be impaired.

The grip member 19 is attached to the shaft cylinder main body 5 using a jig as follows. The jig 28 to be used is a cylindrical tube body in which a taper whose outer diameter increases toward the rear of the shaft tube body 5 is formed (FIG. 9). The maximum outer diameter of the jig 28 is formed to be larger than the outer shape of the circumferential protrusion 23 of the shaft cylinder body 5, and the jig 28 can be attached to and detached from the front portion of the shaft cylinder body 5. Is formed.
When the gripping member 19 is mounted, first, the jig 28 is mounted on the front portion of the shaft cylinder body 5 and the gripping member 19 is inserted from the front portion. Then, the holding member 19 receives a force in the outer diameter direction by the jig 28. As described above, since the force in the insertion direction of the gripping member 19 is also received in the outer diameter direction, the gripping member 19 is moved to the rear of the shaft body 5 while the slit portion 27 is expanded. In this state, the gripping member 19 also climbs over the elliptical convex portion 20 of the shaft cylinder main body 5, completely climbs over the jig 28, and when the gripping member 19 passes, It is restored to the shape of and is mounted in a state that matches the diameter of the reduced diameter portion 18 of the shaft cylinder body 5. When the attachment is completed, the gripping member side corrugated portion 24 and the shaft tube side corrugated portion 26 are brought into contact with and engaged with each other.
In this embodiment, when the gripping member 19 is mounted on the shaft tube main body 5, the slit portion 27 is positioned so as to face the clip main body 29 of the clip 180 degrees. Yes.

In the present embodiment, the mounting method in which the gripping member 19 is inserted and mounted from the front of the shaft cylinder main body 5 is shown. However, the present invention is not limited to this, and any mounting method can be employed. For example, mounting by screwing at the step portion of the tip member 4 and the shaft tube main body 5 (rear end portion of the reduced diameter portion of the shaft tube main body) or mounting by fitting a gripping member from the side surface of the shaft tube main body 5 It is.
If the fixing to the shaft cylinder main body 5 is ensured, the mounting method of the gripping member 19 to the shaft cylinder main body 5 is not limited, but the circumferential protrusion 23 of the shaft cylinder main body 5 is overcome as in this embodiment. In the mounting method, the loosening of the threaded portion of the tip member 4 is eliminated compared to the case of mounting by screwing at the stepped portion of the tip member 4 and the shaft cylinder body 5. More specifically, when the metal tip member 4 and the metal gripping member 19 are used as in the present embodiment, even if the gripping member 19 is sandwiched between the tip member 4 and the shaft cylinder main body 5, I ca n’t eat. Furthermore, in the case of metals, vibration is easily transmitted, and therefore the tip member 4 may be loosened due to long-term use or vibration when dropped. In the case of the configuration and mounting method of the present embodiment, the looseness of the threaded portion of the tip member 4 is eliminated.
Further, as in the present embodiment, when the gripping member 19 is mounted from the front of the shaft tube main body 5, the slit portion that can be formed compared to the case of mounting by fitting the gripping member 19 from the side surface of the shaft tube main body 5. The width range of 27 is widened. More specifically, when the gripping member 19 is fitted from the side surface of the shaft cylinder body 5, the slit portion 27 must be expanded beyond the shaft diameter, so that the width of the slit portion 27 that can be formed is limited. This is because when the width of the slit portion 27 is narrow, the amount of expansion of the slit portion 27 at the time of mounting becomes large, and a sufficient restoring force cannot be obtained. On the other hand, in the case of the mounting method of the present embodiment, the gripping member 19 can be assembled by temporarily setting the inner diameter of the gripping member 19 at the time of mounting to be equal to or greater than the shaft diameter, and the width of the slit portion 27 is equal to or greater than the shaft diameter. There is no need to Therefore, in the case of the mounting method of the present embodiment, the range of the width of the slit portion 27 that can be formed is widened.

  As described above, in the gripping member 19 of the present embodiment, the slit portion 27 of the gripping member 19 is expanded in the process of mounting the gripping member 19 on the shaft tube main body 5 and the elasticity of the gripping member 19 is increased. (Restoring force) makes it possible to mount in a state suitable for the grip portion of the shaft cylinder body 5. And since the slit part 27 is continuously formed in the said holding member 19 from the front to the back, the extent of the expansion of the holding member 19 can be changed by the slit part 27, and various axis | shafts can be changed. The gripping member 19 can correspond to the diameter.

In addition, in the present embodiment, the elliptical convex portion 20 formed on the shaft cylinder and the elliptical through hole 25 of the gripping member 19 are engaged as described above. You can enjoy change.
In addition, as in the present embodiment, when engaging with the convex portion formed in the shaft tube main body and the through hole formed in the gripping member, simply with respect to the reduced diameter portion of the shaft tube having no convex portion. Compared with the case where a gripping member having a through hole is mounted, hand pain when using a writing instrument for a long time can be reduced. At the same time, the engagement between the projection and the through-hole prevents the gripping member from rotating in the circumferential direction with respect to the shaft cylinder and the axial displacement of the shaft cylinder. This misalignment is also prevented in the circumferential direction by the engagement between the shaft tube side corrugated portion 24 and the gripping member side corrugated portion 26 described above.
Furthermore, as in this embodiment, when the gripping member is formed of a metal material and the shaft tube main body is formed of a resin material, the above-described convex portion on the shaft tube main body side and the gripping member side It is possible to enjoy not only the change of the touch due to the shape of the through-hole, but also a different feel due to the difference in material.

  Next, a second embodiment of the present invention will be described with reference to FIGS. 2nd Example is an example of the holding member which formed the slit part in the curve and changed the width | variety (slit width) of the slit part from the front end to the rear end. In the following, description of the same configuration as in the first embodiment is omitted.

Also in the present embodiment, a reduced diameter portion (gripping portion) 18 is formed in the front portion of the shaft cylinder body 5. A cylindrical holding member 19 made of metal is attached to the reduced diameter portion 18.
In the present embodiment, a plurality of deformed elliptical convex portions 30 having a length in the axial direction and having a reduced diameter at the rear are formed on the surface of the reduced diameter portion 18 of the shaft cylinder main body 5. The deformed elliptic convex portions 30 are formed at three positions every 90 degrees in the circumferential direction of the reduced diameter portion 18 of the axial tube main body 5, and the deformed elliptic convex portions 30 located in the center of the deformed elliptic convex portions 30 are clip body 29 of the clip. It is formed in the position facing. Further, a convex portion 32 having a shape corresponding to a slit portion 35 of the gripping member 19 described later is formed in the direction of the clip main body 29 of the clip of the reduced diameter portion 18. The convex portion 32 has the most detailed portion 33 in front of the center in the axial direction of the reduced diameter portion (gripping portion), and is gradually thickened in the front-rear direction of the most detailed portion 33. (FIG. 13).
As in the first embodiment, the deformed elliptic convex portion 30 and the convex portion 32 are both tapered so that the outer shape of the elliptic convex portion 20 expands from the top to the reduced diameter portion 18 of the shaft body 5. (The taper portion 34), and the intersecting portion of the elliptical convex portion 20 and the reduced diameter portion 18 of the shaft tube main body 5 is formed from a corner portion. The vicinity of the corner of the elliptical convex part 20 is a weak part, and when the gripping member 19 is mounted, the weak part (near the corner) is crushed and fixed so that the gripping member 19 bites into the shaft cylinder body 5. The As a result, the circumferential rotation of the gripping member 19 with respect to the shaft cylinder body 5 is more reliably prevented, and the axial displacement is prevented, so that the gripping member 19 is securely fixed. Can do. Of course, the shape of the intersecting portion of the elliptical convex portion 20 and the reduced diameter portion 18 of the shaft tube main body 5 is not limited to the corner portion, but may be a curved surface portion protruding in the inner diameter direction of the shaft tube body 5.
Also in the present embodiment, a circumferential protrusion 23 is formed in the front portion of the reduced diameter portion 18 of the shaft cylinder body 5.

The metal cylindrical gripping member 19 in the present embodiment will be described in detail.
The gripping member 19 of the present embodiment has a plurality of deformed elliptical through-holes 31 having a size and position corresponding to the deformed elliptical convex portion 30 formed in the shaft cylinder main body 5.
The gripping member 19 is formed with a slit portion 35 continuous from the front end portion to the rear end portion. In the present embodiment, the slit portion 35 has the most detailed portion 36 in front of the center in the longitudinal direction of the gripping member 19 and gradually becomes thicker in the front-rear direction of the most detailed portion 36. (FIG. 14). The ratio of the thickest part 37 to the thickest part 37 from the most detailed width of the slit part 35 to the shaft diameter of the shaft body 5 is formed to be 5% to 50%, but the ratio is arbitrarily changed. Can do. Desirable is 5% to 50% of the present embodiment. The reason is that if it is less than 5%, the slit part is difficult to expand and it takes time to assemble, and if it is more than 50%, the elasticity of the gripping member cannot be obtained and gripping is performed. This is because the member cannot be fixed.

The mounting method of the gripping member 19 to the shaft cylinder main body 5 is mounted by inserting the gripping member 19 from the front of the shaft cylinder main body 5 in the same manner as in the first embodiment. I can do it.
Also in the case of the gripping member 19 of the present embodiment, the slit portion 35 of the gripping member 19 is expanded in the process of mounting the gripping member 19 on the shaft cylinder body 5, and the elasticity (restoring force) of the gripping member 19 is expanded. Thus, it is possible to mount in a state suitable for the grip portion of the shaft cylinder body 5. And since the slit part 35 is continuously formed in the said holding member 19 from the front to the back, the extent of the expansion of the holding member 19 can be changed with the slit part 35, and various shafts can be changed. The gripping member 19 can correspond to the diameter.

In the case of the present embodiment, since the slit portion 35 of the gripping member 18 has a different width depending on the position in the axial direction, the width of the writing instrument design can be increased.
At the same time, since the width of the slit portion 35 is formed to be thicker at the rear end portion than at the front end portion, there is a concern when the gripping member 19 is inserted and attached from the front of the shaft barrel body 5. The possibility of damage to the shaft cylinder main body 5 by the rear end portion of the gripping member 19 can be reduced.
In addition to this, in the present embodiment, the through hole of the gripping member 19 and the convex portion of the shaft tube main body 5 have a deformed elliptical shape with a large diameter on the front side. It is possible to improve the interest by the difference in the anti-slip effect and feel. Generally, gripping is often performed with the fingertip swinging in front of the gripping part, so that the deformed elliptical large diameter part is formed in front of the gripping part where the fingertip is easy to touch. It is easy to do and it is also non-slip.

  As shown in FIGS. 15 and 16, a plurality of groove portions 38 parallel to the circumferential direction of the shaft tube main body are formed in the top portions of the deformed elliptical convex portion 30 and the convex portion 32 of the shaft tube main body 5 of the present embodiment. It may be possible (a modification of the second embodiment). By forming the groove portion 38, the anti-slip effect when the writing instrument is gripped is improved. The width and interval of the groove can be arbitrarily determined.

As described above, the first embodiment and the second embodiment are configured. In addition, the slit shape can be various shapes. Although the modification is shown below, the grip member which can respond to various shaft diameters in any case is obtained.
FIG. 17 is a first modification of the shape of the slit portion. The width of the slit portion 39 is different between the front and the rear, and in the present modification, the slit width at the rear portion is wide. Since the slit width is different between the front side and the rear side as described above, the front and rear of the gripping member 19 can be easily recognized at the time of assembly, and the gripping member can be prevented from being assembled from the wrong direction at the time of assembly.
FIG. 18 is a second modification of the shape of the slit portion. The shape of the slit portion 40 is a wave shape, and the width thereof is the same from the front end portion to the rear end portion. With this configuration, the design is improved.
Further, FIG. 19 shows a third modification of the shape of the slit portion. Also in this modified example, the slit portion 41 is continuously formed from the front end portion to the rear end portion of the gripping member 19, but in the vicinity of the center of the gripping member, it has a stepped shape having a length in the circumferential direction. ing. By comprising in this way, it can prevent reliably that a holding member removes after mounting | wearing. This is because even when an external force is applied in the outer diameter direction of the gripping member, the force is fastened at the stepped step portion 42 and is difficult to be transmitted to the entire slit portion.
FIG. 20 shows a fourth modification of the shape of the slit portion. Also in this modification, the slit portion 43 is continuously formed from the front end portion to the rear end portion of the gripping member 19, but an S-shaped folded portion 44 is formed near the center of the gripping member. By comprising in this way, it can prevent reliably that a holding member removes after mounting | wearing. Even when an external force is applied in the outer diameter direction of the gripping member, the folded portions 44 of the S-shape cross each other, and this is a measure for preventing the removal.

In addition, as a modification of the shape of the slit portion, all of them are shown in which a slit portion is formed on a cylindrical gripping member, but not limited to this shape, as shown in the first embodiment and the second embodiment. Moreover, you may form the through-hole of various shapes in a holding member. Further, by forming a through hole having a shape corresponding to the gripping member in the shaft tube main body, it is possible to obtain a gripping member capable of widening the design and obtaining various feelings.
Further, the gripping member may be provided with a concave portion or a convex portion instead of the through hole, or a combination thereof. In the case of a metal gripping member, the uneven portion on the surface may be formed by knurling, or the through hole or the uneven portion may be formed by pressing. Similarly, in the case of a gripping member made of a hard resin member, a concavo-convex portion may be formed on a part or the whole of the surface, or a through hole may be formed in the mold split direction. In any case, a gripping member can be obtained that can broaden the design and obtain various feelings.

  Further, in the first embodiment, the second embodiment, and the various modifications of the shape of the slit portion, the cylindrical gripping member and the shaft tube main body are all shown, but the gripping member and the shaft tube main body are cylindrical. It is not limited to the shape, and may be a cylindrical body. For example, the gripping member and the shaft cylinder main body may be formed of a rectangular cylinder such as a triangular cylinder, a pentagonal cylinder, or an octagonal cylinder. In any case, the gripping member that can handle various shaft diameters is formed by forming the gripping member from a hard material and forming a slit portion continuously from the front end to the rear end of the gripping member. can get.

DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Pipe 3 Core holding member 4 Tip member 5 Shaft cylinder main body 6 Center feeding mechanism 7 Chuck body 8 Chuck ring 9 Core tank 10 Reduced diameter part 11 Step part 12 Step part 13 Repulsion member (coil spring)
14 Eraser 15 Pressing member 16 Clip 17 Recessed portion 18 Reduced diameter portion (gripping portion)
DESCRIPTION OF SYMBOLS 19 Gripping member 20 Elliptic convex part 21 Tapered part 22 Weak part 23 Circumferential protrusion 24 Shaft cylinder side corrugated part 25 Elliptical through hole 26 Gripping member side corrugated part 27 Slit part 28 Jig 29 Clip body 30 Deformation ellipse convex part 31 Deformation ellipse Through hole 32 Convex part 33 Most detailed 34 Tapered part 35 Slit part 36 Most detailed 37 Thickest part 38 Groove part 39 Slit part 40 Slit part 41 Slit part 42 Step part 43 Slit part 44 Folded part L Core

Claims (6)

A gripping member to be mounted on a gripping portion of a writing instrument shaft cylinder, the gripping member being formed from a hard material and formed into a cylindrical shape, and continuously formed from the front end to the rear end of the gripping member A gripping member for a writing instrument, wherein a slit portion is provided. The holding member for a writing instrument according to claim 1, wherein at least one of a through hole and / or a concave portion and / or a convex portion is formed in the gripping member.
The holding member for a writing instrument according to claim 1 or 2, wherein the holding member is made of a metal material. The thickness of the said holding member was 0.1 mm-2.0 mm, The holding member of the writing instrument of any one of Claim 1 thru | or 3 characterized by the above-mentioned. A writing instrument, wherein the gripping member according to any one of claims 1 to 4 is mounted on a gripping portion of a shaft tube. The writing instrument according to claim 5, wherein a convex portion is formed in the shaft cylinder, and a through hole that engages with the convex portion is formed in the gripping member.

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