JP4463513B2 - Grip mounting structure for writing instruments - Google Patents

Description

  The present invention relates to an improvement in a grip mounting structure in a writing instrument having a grip member for preventing slip.

Japanese Utility Model Publication No. 7-7985 In the past, a soft material such as silicone rubber, EPDM, or NBR was used for the grip portion in order to eliminate slipping of the grip portion or pain of the finger when writing for a long time. A writing instrument fitted with is known. Further, the grip member is generally difficult to handle due to its softness, and there are problems that it takes time to fit the shaft member into the shaft cylinder, and there is a problem that the grip member is twisted and deformed when a rotational force is applied to the grip member. Further, there is a problem in that it takes time to align the grip members when the outer shape of the grip members is irregular or when there are decorations, patterns, character displays, etc. on the outer surface of the grip members.

In Japanese Utility Model Laid-Open No. 7-7985, a protruding edge or a recessed edge is provided on the outer peripheral surface of the finger holder on the tip side of the writing instrument body, and a recessed edge is provided on the inner peripheral surface of an elastic cylinder made of an elastic material such as rubber. Protruding edges are provided at least partially along the respective axial directions, and the recessed edges or protruding edges of the finger rests are engaged with the protruding edges or recessed edges of the elastic cylinder to An anti-slip device for a writing instrument with a fingertip inserted therein is shown. This solves the problem that the grip member is twisted and deformed when the grip member is subjected to rotational force.However, when the grip member has an irregular outer shape, or when there are decorations, patterns, characters, etc. on the outer surface of the grip member. The problem of time-consuming alignment is not solved.
In addition, when a protruding edge is provided on the inner peripheral surface of the elastic cylinder and a concave edge is provided on the outer peripheral surface of the writing instrument body, it is difficult to insert them into each other. If an edge is provided and a protruding edge is provided on the outer peripheral surface of the writing instrument body, it will be easy to insert between them, but since the thickness of the elastic cylinder at the part where the protruding edge is inserted becomes thin, There is a bug that is hard.

The main problem of the present invention is a grip mounting structure for a writing instrument in which a soft material such as silicon rubber, EPDM, or NBR is fitted on a grip portion of a shaft cylinder, and the grip member has an irregular shape or a grip member Even if there are decorations, patterns, characters, etc. on the outer surface of the instrument, it is easy to insert and align the grip member to the shaft cylinder, and there is no problem with the grip attachment structure of the writing instrument that does not cause a problem that the elastic cylinder has a firm finger contact It can be provided.
In addition, it is possible to improve the assembly of writing instruments and emphasize the design.

The present invention has the following configuration in order to achieve the above-described problems.
The grip attachment structure for a writing instrument according to the first aspect of the invention is a grip attachment structure for a writing instrument formed by fitting a grip member made of a soft material such as silicon rubber, EPDM, or NBR onto a grip portion of a shaft cylinder. The shaft tube is formed with a convex portion at one portion of the stepped portion at the rear end of the grip portion, and a rib is formed on the grip portion shaft surface on the same line as the convex portion, while the grip member is In addition, a notch-shaped recess is formed at one location on the rear end, and a groove is formed on the outer side of the peripheral surface of the inner hole toward the front of the recess, and the thickness of the periphery on the outer periphery of the grip member where the groove is located Convex wire is formed so that the thickness of the grip member is approximately the same as that, and the grip member is inserted into the shaft tube with the concave portion of the grip member facing the convex portion at the rear end of the shaft tube grip portion. The groove of the grip member is fitted into the rib of the shaft tube and the shaft tube Recess of the grip member is engaged with the protrusion.

  The grip mounting structure for a writing instrument according to claim 2 is the grip mounting structure for a writing instrument according to claim 1, wherein a circumferential collar is formed in front of the rib of the shaft tube, and the grip The inner hole is appropriately enlarged in front of the groove portion of the member, a step is formed in the inner hole near the front end of the grip member, and the groove portion of the grip member is fitted into the rib of the shaft tube to form the convex portion of the shaft tube. When the concave portion of the grip member is engaged, the grip member is prevented from coming off from the grip portion of the shaft tube in a state where the step portion of the grip member is in contact with the rear end of the flange portion of the shaft tube.

In the present invention, the grip member can be easily positioned and attached to the shaft cylinder in a state where the concave portion of the grip member faces the convex portion at the rear end of the grip portion of the shaft cylinder. The groove portion of the grip member is fitted into the rib of the shaft tube, and the concave portion of the grip member can be engaged with the convex portion of the shaft tube. In addition, the convex strips are formed on the outer periphery of the grip member where the groove is located, so that the thickness of the grip member is approximately the same as the surrounding thickness, so there is no sense of incongruity with the fingers and the grip member alignment mark and design Effective for emphasis on sex.
In addition, the grip member can be fixed to the grip portion of the shaft tube in a state in which the grip member is prevented from coming off while the step portion of the grip member is in contact with the rear end of the flange portion of the shaft tube.
Even when the outer shape of the grip member is irregular or there are decorations, patterns, characters, etc. on the outer surface of the grip member, it is easy to insert and align the grip member to the shaft tube, and It is possible to provide a grip mounting structure for a writing instrument that does not have a problem of being hard to hit. In addition, it is effective in improving the assembly of writing instrument elements and emphasizing the design.

  The present invention can be applied to general writing instruments such as a ballpoint pen, a mechanical pencil, and a sign pen. An embodiment of the present invention will be described below with reference to the drawings.

First, the embodiment shown in FIG. 1 and FIG. 2 is shown with a knock-type ballpoint pen that allows a writing tip portion to be projected and retracted from the tip end of a tip shaft 4.
3 and 4 show a clip fixing structure.

The clip 6 is made of a box-shaped metal formed by pressing or the like, and has a ball portion 6c on the inner surface side of the front end of the clip piece 6a and a base portion 6d on the rear end. A window portion 6b is provided on the upper surface of the clip piece 6a so as to hang from the rear to the front, and a notch portion is formed rearward at the rear end of the window portion 6b. And a base 6d is provided. The locking uneven portion is formed by, for example, a saw blade-shaped locking portion having an inclined surface at the front and a stepped portion at the rear at one or more locations. It should be noted that when the clip 6 is formed by pressing a thin metal plate and elastic deformation of the base portion 6d can be expected, it is desirable to engage with each other so that the engaging uneven portions provided to each other mesh. When the clip 6 is compact or has high rigidity, it may be desirable to avoid excessive deformation of the engaging concave and convex portions of the clip on the engaging groove of the rear shaft. In addition, consideration is given to increasing the engagement accuracy by providing a large number of difference in the height of the engaging irregularities provided to each other and making them many. On the other hand, the rear shaft 3 is formed with a crown portion 3a at the rear and a cylindrical portion 3d at the front, and a mounting portion 3b protruding outward is provided on a side surface of the crown portion 3a. Engaging grooves 3c are formed on both sides. The engaging groove 3c is provided with a locking uneven portion shaped so as to meet a locking uneven portion formed in the base 6d of the clip. In addition, a hook-like overhang portion 3e having an appropriate length is formed in front of the attachment portion 3b.
Further, the cylindrical portion 3d is provided with a step portion 3g having a curved surface as appropriate at the front end of the crown portion 3d, and is provided with a slightly smaller diameter in front thereof. A locking projection 3f is formed on the outer surface of the cylindrical portion 3d on the same line as the mounting portion 3b, and the front end surface of the cylindrical portion is inclined.
In the embodiment, a knock mechanism for locking the writing tip from the tip of the front shaft 4 so that the writing tip can be retracted is provided in the rear shaft 3.

  The clip fixing structure of the embodiment is configured as described above, and when the clip 6 is slid forward and the engaging uneven portion of the clip is engaged with the engaging groove 3c of the mounting portion 3b of the rear shaft. The engagement portion can be easily started by forming the introduction portion on either or both of the engaging uneven portion and the attaching portion. In addition, since the engaging uneven portion of the clip is formed with, for example, a saw blade-like engaging portion having an inclined surface at the front and a step portion at the rear, the engaging groove is locked by the elastic deformation effect of the inclined surfaces. It is possible to prevent the uneven portion from being peeled off, and it is possible to firmly fix each other by biting the stepped portion. Further, by providing the extension portion 3e of the attachment portion with an appropriate length along the clip window portion 6b, a novel design is emphasized and a tag or memo is provided between the lower portion of the extension portion and the upper surface of the clip. It is possible to sandwich a small piece with a mark on it, or to sandwich a name tag or the like when carrying a writing instrument with a clip placed in a breast pocket or the like.

5 to 8 show the shaft cylinder 2.
As shown in the drawing, the shaft cylinder 2 is composed of a rear shaft portion 2a and a front shaft portion 2b, and a locking window portion 2g is formed in the side surface of the substantially rear end of the rear shaft portion 2a. A rotation-preventing groove 2i is formed, and the rear end 2h has an appropriate curved surface. The front end of the rear shaft portion 2a is a front shaft portion (grip portion) 2b having a step portion 2c and having a slightly smaller front diameter. A projecting portion 2d having a rear terminal shape is formed on the front shaft portion side at one portion of the stepped portion 2c, and a rib 2e is formed on the axial surface of the front shaft portion 2b on the same line as the projecting portion 2d. Further, a circumferential flange portion 2f is formed at an appropriate interval at the front end of the rib 2e, and a screw portion is formed on the outer periphery of the front portion of the flange portion 2f.
The interval is not always necessary. In the embodiment, the locking window portion 2g is also provided on the same line as the convex portion 2d, but this is not always necessary.

The rear shaft 3 described above is inserted into the rear end hole of the rear shaft portion 2a, and the locking projection 3f is locked to the locking window portion 29 so that the rear shaft 3 is fixed to the shaft tube 2. Further, a protrusion 3h is formed at the rear part of the locking projection 3f and engaged with a rotation-preventing groove 2i provided on the inner surface of the shaft at the rear of the shaft tube, so that the rotation stop effect on the shaft tube 2 can be increased. Furthermore, the rear end 2h of the shaft tube and the step portion 3g of the rear shaft are in contact with each other on the curved surface, so that the design can be emphasized and the anti-rotation effect on the shaft tube 2 can be further enhanced. (There is no necessity to provide all the rotation stop means.)
In addition, since the front end surface of the cylindrical portion 3d of the rear shaft is inclined, it can be smoothly inserted into the rear end hole of the rear shaft portion 2a. Further, when the shaft cylinder 2 is provided as a transparent cylinder, there is an effect that the design can be emphasized.

9 to 13 show the grip member 5.
The grip member 5 is made of a soft material such as silicon rubber, EPDM, or NBR. A notch-shaped recess 5d is formed at one position on the rear end, and a groove is formed outwardly of the inner peripheral surface toward the front of the recess 5d. 5b is formed, and a convex line 5e is formed on the outer periphery of the grip member where the groove 5b is located so as to have a wall thickness approximately equal to the surrounding wall thickness, with an appropriate interval between the front end of the groove 5b. The diameter of the hole is appropriately increased, and a step portion 5 c is formed in the inner hole near the front end of the grip member 5.
The interval is not always necessary.

  The grip member 5 is inserted into the shaft cylinder 2 in a state where the concave portion 5d of the grip member 5 is aligned with the convex portion 2d at the rear end of the front shaft portion 2b (grip portion) of the shaft tube, and the rib 2e of the shaft tube 2 is attached. The groove portion 5b of the grip member 5 is fitted and the concave portion 5d of the grip member 5 is engaged with the convex portion 2d of the shaft tube 2, and the step portion 5c of the grip member 5 is brought into contact with the rear end of the flange portion 2f of the shaft tube 2. In the state of contact, the grip member 5 can be fixed to the front tube portion 2b (grip portion) of the shaft tube in a state in which the shaft member 2 is not rotated and prevented from coming off.

  As described above, the ballpoint pen refill is mounted in the shaft cylinder 2, and the front shaft 4 is fixed to the front end of the shaft cylinder 2 by screwing in a state of substantially contacting the front end of the grip member. The tapered outer surface of the tip shaft 4 is formed with a groove 4a at a required location, so that the tip shaft 4 can be tightened firmly so as not to loosen or easily loosened even if tightened strongly. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a half sectional view showing an entire knock-type ballpoint pen to which a grip mounting structure for a writing instrument according to the present invention is applied. It is the figure which looked at the whole knock type ball-point pen from the upper part. It is the front view of the principal part cross section which expanded and showed the clip fixing structure of the writing instrument which is embodiment. It is the head which looked at FIG. 3 from the upper surface. It is sectional drawing of a shaft cylinder. It is a top view of a shaft cylinder. 5 is a side view of the upper end side. It is AA sectional drawing of FIG. It is sectional drawing of a grip member. It is a top view of a grip member. It is a front view of a grip member. 10 is a side view on the upper end side. FIG. FIG. 11 is a side view of the lower end side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Writing instrument 2 Shaft cylinder 2a Rear shaft part 2b Front shaft part (grip part)
2c Stepped portion 2d Protruding portion 2e Rib 2f Gutter portion 2g Locking window portion 2h Rear end 2i Anti-rotation groove 3 Rear shaft 3a Ceiling crown portion 3b Mounting portion 3c Engaging groove 3d Tube portion 3e Overhang portion 3f Locking protrusion 3g Step part 3h Projection part 4 Lead shaft 4a Groove part 5 Grip member 5a Inner hole 5b Groove part 5c Step part 5d Concave part 5e Convex line part 5f Convex part line 5g Dimple 6 Clip 6a Clip piece 6b Window part 6c Base part 6d Base part

Claims (2)

A grip attachment structure for a writing instrument in which a grip member made of a soft material such as silicon rubber, EPDM, or NBR is fitted to a grip portion of a shaft tube, and the shaft tube is provided at one position of a step portion at the rear end of the grip portion. A convex part is formed, and a rib is formed on the grip part axial surface toward the front on the same line as the convex part. On the other hand, the grip member is formed with a notch-shaped concave part at one location of the rear end. A groove is formed outward of the peripheral surface of the inner hole toward the front of the recess, and a convex line is formed on the outer periphery of the grip member where the groove is positioned so as to have a thickness substantially equal to the surrounding thickness. The grip member is inserted into the shaft cylinder with the concave portion of the grip member facing the convex portion at the rear end of the shaft cylinder gripping portion, and the groove portion of the grip member is inserted into the rib of the shaft cylinder and the shaft The concave portion of the grip member is engaged with the convex portion of the tube. Grip mounting structure of Kigu.   A circumferential collar is formed in front of the rib of the shaft cylinder, and the inner hole is appropriately enlarged in front of the groove of the grip member to form a step in the inner hole near the front end of the grip member. When the groove portion of the grip member is inserted into the rib of the cylinder and the concave portion of the grip member is engaged with the convex portion of the shaft cylinder, the shaft with the stepped portion of the grip member in contact with the rear end of the flange portion of the shaft cylinder The grip mounting structure for a writing instrument according to claim 1, wherein the grip member is prevented from coming off with respect to the grip portion of the cylinder.

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