JP2009166341A - Grip of writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the grip of a writing utensil, which firmly fits to finger tips and gives a plenty of attractive features at writing. <P>SOLUTION: The grip mounted to a portion, through which a writing utensil is held, is tubularly molded out of highly elastic non-rigid synthetic resin and, at the same time, a plurality of numbers of recessed parts are formed on the surface of the grip. When the grip is held by the finger tips, the recessed parts deform so as to reduce their internal volumes and the decompression of closed spaces formed by the finger tips and the recessed parts due to the restoring action of the recessed parts brings suctional action to the finger tips. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a grip attached to a portion that holds a writing instrument.

  When gripping and writing with a fingertip on the front part of a shaft tube made of hard synthetic resin, the grip is often attached to the gripping part because the fingertip slips and is difficult to write. Is molded into a cylindrical shape with a synthetic resin that is softer than the shaft tube, and the fingertips fit into the grip during writing, making it difficult to slip. Further, since the grip has a design element, it has an advantageous effect on the appearance.

If this grip is molded from a soft synthetic resin, it fits well on the fingertips but is easy to stick and may cause discomfort. On the other hand, when it is molded with a hard (small soft) resin, the fit to the fingertip is insufficient. For this reason, a soft resin and a hard resin that are molded in a laminated state, or provided with a space inside to facilitate fitting are proposed and put into practical use.
JP 2007-320245 A

  By the way, it is important that writing tools, especially popular writing tools, not only provide the original writing function but also make the user enjoyable and interesting. However, even if the conventional grip has a design effect, it has not been put into practical use at the time of writing. Accordingly, an object of the present invention is to provide a grip for a writing instrument that fits tightly to a fingertip and is interesting for writing.

  Accordingly, the present invention provides a grip attached to a portion for gripping a writing instrument, which is formed into a cylindrical shape with a soft synthetic resin rich in elasticity, and has a plurality of concave portions formed on the surface thereof. The recessed portion is deformed to reduce the internal volume, and the closed space formed by the fingertip and the recessed portion is decompressed by the restoring action of the recessed portion, and is brought into a state of being attracted to the fingertip.

  When gripping with a fingertip, the grip is attracted to the fingertip, so it fits securely and is easy to write. It can be.

  The best mode for carrying out the present invention will be described below with reference to the drawings. 1 and 2 show an example in which the grip of the present invention is applied to a knock-type ballpoint pen, but the present invention is not limited to the knock-type ballpoint pen. In FIG. 1 and FIG. 2, a ball pump refill 2 filled with oil-based ink is accommodated in a shaft 1 made of synthetic resin in a state where it is ejected to the tail end side by a knock spring 3. In the ballpoint pen refill 2, the pen body 21 at the tip protrudes and disappears from the tip opening of the shaft tube 1 by a well-known retracting mechanism described below.

  Briefly describing this intrusion mechanism, the tail end of the ballpoint pen refill 2 is in contact with the rotor 6. A cam 5 having a longitudinal groove formed of a longitudinal rib is fixed to the inner surface of the shaft cylinder 1 and can move back and forth in a state where the blade portion of the rotor 6 is fitted in the longitudinal groove of the cam 5. ing. A knock cover 4 integrally formed with a clip 41 protrudes from the tail end opening of the shaft cylinder 1, and a knock 43 is connected to the knock cover 4 via a knock joint 42. When the knock cover 4 is knocked from the state in which the pen body 21 is immersed in the shaft cylinder 1, the knock 43 moves forward to move the rotor 6 forward in a state where rotational force is applied to the rotor 6. When the blade portion of the rotor 6 comes out of the vertical groove, the pen body 21 protrudes from the tip opening 11 of the shaft tube 1 and the rotor 6 rotates a little to engage the blade portion with the tip of the vertical rib of the cam 5. Stop and be able to write. Further, when the pen body 21 is knocked again from the state in which it protrudes from the tip opening 11 of the shaft cylinder 1, the rotor 6 rotates a little so that the blade portion again fits into the vertical groove of the cam 5, and when the knock is released, the rotor 6 Retreats and the pen body 21 is immersed in the shaft cylinder 1.

  A grip 7 is attached to the tip portion of the shaft tube 1. The grip 7 is formed into a cylindrical shape with a soft and elastic synthetic resin, for example, silicon rubber, and a large number of hemispherical concave portions 71 are formed on the surface thereof. When the grip 7 is gripped with the fingertip, the fingertip F comes into contact with the recessed portion 71a as shown in FIG. 3A, and the grip 7 is elastically deformed as shown in FIG. The air inside the recessed portion 71a with which F abuts escapes to the outside and the internal volume is reduced. However, since the grip 7 is formed of a synthetic resin rich in elasticity, a restoring force acts on the deformed recessed portion 71a, and the closed space formed by the fingertip F and the recessed portion 71a is slightly expanded to a reduced pressure state. Become. For this reason, since the grip 7 is lightly adsorbed to the fingertip F and fits securely, it becomes easy to write, and the function as the grip is reliably achieved. In addition, the light adsorption state provides a unique feel that is not found in conventional writing instruments, and can be a very interesting writing instrument.

It is a front view of this invention Example. It is sectional drawing of this invention Example. It is explanatory drawing of the holding state of a grip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shaft cylinder 11 Tip opening 2 Ball-point pen refill 21 Pen body 3 Knock spring 4 Knock cover 41 Clip 42 Knock joint 43 Knock 5 Cam 6 Rotor 7 Grip 71 Recessed part

Claims (1)

  The grip attached to the part that grips the writing instrument is molded into a cylindrical shape with a soft synthetic resin rich in elasticity, and a plurality of recesses are formed on the surface, and the recess is deformed when gripped with a fingertip. Thus, the grip of the writing instrument is characterized in that the internal volume is reduced, and the closed space formed by the fingertip and the recessed portion is decompressed by the restoring action of the recessed portion, and the fingertip is attracted.

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