JP4861231B2 - Writing instrument - Google Patents

Description

  According to the present invention, a grip member made of an elastic body is attached to a grip portion of a shaft tube in a state where the length in the axial center direction is compressed, and the shaft tube is mounted on the front end surface side and / or the rear end surface side of the grip member. It is related with the writing instrument which mounts an attachment member rotatably with respect to.

  2. Description of the Related Art Conventionally, a writing instrument in which a grip member made of an elastic body is detachably attached to a grip portion of a shaft tube is well known.

A structure in which the axial length of the grip member is compressed with an attachment member such as a base in the shaft tube of such a writing instrument and the gap between the base member and the grip member is not formed is also known. In Japanese Patent Application Laid-Open No. 2002-219896, a writing cylinder that reduces the rotational resistance between the rear end surface of the tip member and the front end surface of the grip member and reduces the clamping force of the base. Disclosure.
"Japanese Patent Laid-Open No. 2002-21989"

  However, since Patent Document 1 forms a recess on the front end surface of the grip member to reduce the contact area, it is necessary to increase the thickness of the grip member to some extent, and a recess is formed on the rear end surface of the tip member. Similarly, there is a problem that the area of the rear end face of the tip member needs to be increased, and the shape is restricted.

  By the way, a member such as a decorative ring or an operation body that is rotatably attached to the shaft tube is more frequently rotated than the tip member, and has a large rotational resistance when abutting on a grip member attached to the shaft tube. Therefore, it is generally arranged at a position separated from the grip member, and there is a problem that the design is restricted.

  In view of these problems, the present invention is to provide a writing instrument with a simple structure in which an attachment member such as a tip member and a decorative ring disposed on the front end surface side and / or the rear end surface side of the grip member is easy to rotate.

According to the present invention, a grip member made of an elastic body is attached to the grip portion of the shaft tube, and an attachment member is mounted on the front end surface side and / or the rear end surface side of the grip member so as to be rotatable with respect to the shaft tube. A writing washer, wherein a resin washer is interposed between the grip member and the attachment member, the axial length of the resin washer is 0.01 mm or more and 0.5 mm or less, and the grip member is It is mounted in pressure contact with the resin washer.

  The resin washer may be the same color as the grip member or the attachment member, or transparent.

  The attached member in the present invention is a member disposed at both ends of the grip member attached to the gripping portion of the shaft tube, such as a rear shaft, a tip member, a decorative ring, an operating body, etc. It is a conventionally known member disposed in

  The present invention can provide a writing instrument with a simple structure in which an attachment member such as a tip member or a decorative ring disposed on the front end surface side and / or rear end surface side of the grip member is easy to rotate.

  Next, examples of the writing instrument of the present invention will be described with reference to the drawings, but the present invention is not limited to the following examples.

Example 1
The writing instrument 1 according to the first embodiment shown in FIGS. 1 to 4 includes a front cylinder 2 and an internal cylinder 4 that are detachably screwed together, and a rear axis 3 that is attached so as to cover the internal cylinder 4 to form an axial cylinder body. Then, a female screw portion of the tip member 6 formed by cutting brass on the male screw portion at the front end of the front shaft 2 is detachably screwed, and a grip formed in advance with silicone rubber on the grip portion of the front shaft 2 A member 5 is provided. In addition, a display portion M displaying alphabet symbols is provided between the grip member 5 and the rear shaft 3 on the circumference, and a decorative ring 15 having a lens portion 16 is rotatably disposed so as to cover the display portion M. It is.

  In addition, the inner cylinder 4 is provided with a retracting mechanism comprising a rotating cam 11 formed of POM resin. This intruding mechanism is known in the art. Briefly, a cam groove (not shown) is formed on the inner wall surface of the inner body 4 for sliding and rotating the rotating cam 11 back and forth. A protrusion formed on the rotating cam 11 is engaged with the cam groove. At the rear end of the rotating cam 11, a push rod 10 having a cam portion for sliding the rotating cam 11 and imparting rotation is disposed, and a knocking body 8 is provided at the rear end thereof. It is a structure that is arranged in a state of projecting outward from the inner cylinder 4. A knock body cover 9 is attached to the knock body 8.

  In front of the rotating cam 11, a ball pen refill having a ball pen tip 13 that rotatably holds a ball at the tip of an ink containing tube 12 that contains ink for writing instrument (not shown) is placed behind the coil spring 14. The ball-point pen refill can be exchanged by urging the shaft 3 toward the rear end and slidably disposing the tip member 6.

  In order to use the knock type writing instrument 1, the knock body 8 is pressed to press the push rod 10, and the rotating cam 11 is advanced along a cam groove (not shown). The rotary cam 11 can be rotated by the action, and the ball-point pen tip 13 can be used by protruding from the tip opening 6 a of the tip member 6. When the knock body 8 is further pressed, the rotating cam 11 is rotated by the action of the cam portion of the push rod 10, and the rotating cam 11 is moved back along the cam groove (not shown) by the biasing force of the coil spring 14. 13 can be immersive.

  The decorative ring 15 is disposed between the front end surface of the rear shaft 3 and the rear end surface 5a of the grip member 5. However, a gap is formed between the front end surface 3a of the rear shaft 3 and the rear end surface 5a of the grip member 5. Since the decorative ring 15 rotates unintentionally and unintentionally, the grip member 5 is compressed between the lip member 6 and the decorative ring 15 when the lip of the lip member 6 is finished. It is attached to the state.

  However, if the decorative ring 15 is disposed in pressure contact with the rear end surface 5a of the grip member 5, the rotational resistance necessary to rotate the decorative ring 15 tends to be large and difficult to rotate. A resin washer 17 formed of PET resin or the like is interposed between the members 5. By interposing this resin washer 17, even if the grip member 5 is mounted in a compressed state, the decorative ring 15 is in contact with the resin washer 17, so that the rotational resistance can be reduced and the rotational operability is improved. Can do.

  In addition, since the resin washer 17 is formed by molding in advance, it can be easily formed in a desired color. By making the resin washer 17 the same color or transparent as the grip member 5 or the decorative ring 15, the appearance is the same as that of the grip member 5. The decorative ring 15 appears to be connected. Furthermore, by making the length (thickness) of the resin washer 17 in the axial center direction 0.01 mm to 0.5 mm, it can be made difficult to visually recognize from the outside. Further, since the resin washer 17 is merely interposed between the grip member 5 and the decorative ring 15, the position of the decorative ring 15 can be set as appropriate, and the grip member 5, the resin washer 17, and the decorative ring 15 can be assembled from the same direction. In addition, the assemblability is improved and it is particularly suitable for a machine assembly.

  If the thickness of the resin washer is less than 0.01 mm, it will bend easily during rotation and assembly of the decorative ring. If the thickness of the resin washer exceeds 0.5 mm, the resin washer will be easily visible from the outside even if it has the same color as the grip member or decorative ring. In order to impair the sense of unity with the grip member or the decorative ring, the thickness is preferably 0.01 mm to 0.5 mm, more preferably 0.3 mm or less.

  Further, the decorative ring 15 is formed with a convex portion 15a projecting in a direction perpendicular to the axis, and a lens portion 16 made of PC resin having an arcuate top surface is disposed on the convex portion 15a. 15a is formed farthest from the shaft center of the shaft cylinder.

  Thus, by forming the convex part 15a which protruded in the perpendicular direction with respect to the axial center in the decorative ring 15, a finger etc. are easy to contact | abut and rotation operation of the decorative ring 15 becomes easy. Further, when the decorative ring 15 is rotated, it is difficult to rotate the decorative ring 15 if it has a portion projecting outward from the axial tube main body, such as a clip member. Since it may shift in the circumferential direction and the display portion M is difficult to see, it is most preferable not to form a portion protruding outward from the shaft cylinder body, such as a clip member. Therefore, by forming the top part of the convex part 15 farthest from the axial center of the shaft cylinder, it is possible to prevent the writing tool from rolling and falling from a desk or the like even if it is a writing tool not provided with a clip member. Synergistic effects can be obtained.

  Although not shown, a resin washer having the same color as that of the grip member 5 is interposed between the tip member 6 and the grip member 5 to reduce rotational resistance between the rear end surface of the tip member 6 and the front end surface of the grip member 5. It is preferable to reduce the clamping force of the base.

  In this embodiment, for the sake of convenience, an internal cylinder is disposed in the rear shaft, and the internal cylinder is provided with a cam groove (not shown), a retracting mechanism such as a rotating cam, etc. A cam groove (not shown) may be formed, and a retracting mechanism such as a rotating cam may be provided, or a shaft cylinder of a cap-type writing instrument that does not include a retracting mechanism.

  In the embodiments, for convenience, PET resin is used as the resin washer, but acrylic resin, PC resin, PP resin, and the like can be appropriately selected and used.

  Further, in the embodiments, the decorative ring and the tip member are illustrated as the attachment member, but any member that can be rotatably mounted on the shaft cylinder on the front end surface side and / or the rear end surface side of the grip member. As long as it is known as a member of a writing instrument such as a rear shaft or an intermediate cylinder, it is not particularly limited.

  The writing instrument of the present invention can be widely implemented as a writing instrument without being limited to the type of the writing body, the knock type, or the cap type, and is provided in contact with the grip member on the attachment member that can rotate with respect to the shaft cylinder. Since it can, the width of the design can be expanded.

It is a longitudinal cross-sectional view which shows the writing instrument of this invention. FIG. 2 is a partially omitted development view in FIG. 1. FIG. 2 is an AA enlarged cross-sectional view partially omitted in FIG. 1. It is a principal part expanded sectional view in which a part was omitted in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Writing instrument 2 Front shaft 3 Rear shaft 4 Inner trunk 5 Grip member 5a Front end surface 6 Mouth member 7 Non-slip member 8 Knock body 8 Knock body cover 10 Push rod 11 Rotating cam 12 Ink storage cylinder 13 Ball-point pen tip 14 Coil spring 15 Magnifier 16 Lens part 17 Resin washer

Claims (2)

A writing instrument in which a grip member made of an elastic body is attached to a grip portion of a shaft tube, and an attachment member is mounted on the front end surface side and / or rear end surface side of the grip member so as to be rotatable with respect to the shaft tube. In addition, a resin washer is interposed between the grip member and the attachment member, and the axial length of the resin washer is 0.01 mm or more and 0.5 mm or less, and the grip member is attached to the resin washer. A writing instrument characterized by being attached in pressure contact . 2. The writing instrument according to claim 1, wherein the resin washer is the same color as the grip member or the attachment member or is transparent .

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