JP2001150864A - Writing utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing utensil, the favorable usage feeling of which can be easily obtained by a method wherein the center of gravity of the writing utensil can be shifted in response to the liking of a writer. SOLUTION: Within the outer covering body of the writing utensil, a weight member movably back and forth is arranged in spiral engagement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument which is gripped by hand and writes, draws, and applies to a writing surface such as a paper surface, and more particularly relates to a writing instrument having a good usability in writing.

[0002]

2. Description of the Related Art Conventionally, a writing instrument which is used by being held by hand is
There are various weights, and the position of the center of gravity differs in each writing instrument. It is thought that such a feeling of use of the writing instrument affects the position of the center of gravity of the writing instrument, the gripping method of the user, and the gripping position.The user may change the gripping position of the writing instrument to obtain a desired feeling of use. That is the fact. There is also known a writing instrument in which a grip member serving as a grip portion can be moved in the longitudinal direction of the barrel to obtain a desired feeling of use, and can be used at a desired grip position.

[0003]

However, in a conventional writing instrument in which the position of the grip portion does not change, the position of the center of gravity is fixed, so that the user has to change the grip position and how to grip in order to obtain a good writing feeling. There was a trouble that it had to be changed, and there was also a point that the feeling of use was not sufficient. Also,
A writing implement with a removable grip greatly affected the design of the exterior.

[0004]

That is, the gist of the present invention is to provide a writing instrument having a weight member which can be moved in the longitudinal direction and fixed at an appropriate position in an exterior body.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 shows an example of a ballpoint pen with a built-in refill. A tail plug 3 is screwed to the rear end of the exterior body 2 that partially projects the refill pen tip 1 from the tip hole. The refill is made of a resin pipe such as polypropylene or polyethylene or a metal pipe body such as stainless steel or brass.
The tip of the pen 1 is connected to the tip of the ink container 4, and the rear end of the ink container 4 is in contact with the bottom of the tail plug 3.

A male spiral portion 4a is formed on the outer wall of the ink storage tube 4, and a stainless steel ring-shaped member 5 having a female spiral portion 5a is connected to the male spiral portion 4a in a screwing relationship. . By rotating the ring-shaped member 5, it is possible to move on the outer wall of the ink storage tube 4, and the user can change the position of the ring-shaped member as appropriate and mount the refill inside the exterior to change the center of gravity of the writing implement itself, Each person can obtain their favorite writing feeling.

FIG. 2 shows another example. Basically, the point that the ring-shaped member 5 having the female spiral portion 5a is used is the same as the above-mentioned example, but the member to which the ring-shaped member 5 'is screwed is the tail plug 3'. That is, the tail plug 3 ′ is an extension portion 3 ′ into the exterior body 2 having the male spiral portion 3 ′ a.
b, and the ring-shaped member is screwed to the extending portion 3′b so as to be able to move back and forth. Here, a groove 2a extending in the longitudinal direction is formed on the inner wall of the exterior body 2, while a wing 5'b slidably engaging with the groove 2a is formed on the ring-shaped member 5 '. Has formed. The tail plug 3 'is rotatably connected to the exterior body 2 by over-fitting, and when the tail plug is rotated in the circumferential direction, the ring-shaped member 5' moves back and forth along the groove 2a. It is said that it can be moved to.

FIG. 3 shows still another example. An extension 6a is formed on the tip 6 instead of the tail plug, and the ring-shaped member 5 'can be moved back and forth by rotating the tip in the circumferential direction with respect to the exterior body.

Other than the above, various modifications can be made without departing from the gist of the present invention. For example, although a ballpoint pen tip is shown as a pen tip, a pen tip made of a fiber convergent body such as an acrylic fiber or a polyester fiber, a small tube type nib with a needle body slidably arranged in a small tube, an ink A synthetic resin nib using a synthetic resin extruded product with a through hole can be used, and the ink supply mechanism to the nib is a fiber or metal ink relay core or an ink relay core. It is also possible to use one having a temporary ink reservoir member having a temporary ink reservoir portion having a comb-shaped vertical cross section, one having a valve mechanism for opening and closing the ink passage by operation, and the like. An in-and-out writing instrument may be used as the writing instrument type. The material of the ring-shaped member may be a metal such as brass or aluminum, or a resin such as POM, PP, or AS. The relationship between the outer body wall and the wings of the ring-shaped member may be irregular. Conversely, an inward protrusion may be formed on the exterior body side and a groove may be formed on the ring-shaped member side.

[0010]

As described above, according to the present invention, it is possible to improve the usability during writing by changing the position of the center of gravity of the writing implement without changing the appearance as much as possible.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example.

FIG. 2 is a cross-sectional view showing another example.

FIG. 3 is a sectional view showing a modification.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pen tip 2 Exterior body 2a Groove 3, 3 'Tail 4 Ink storage tube 4a Male helical part 5, 5' Ring-shaped member 5a Female helical part 3'a Male helical part 3'b Extension part 5'b Feather part 6 Advance payment 6a Extension part

Claims (3)

[Claims] 1. A writing instrument having a weight member which is movable in a longitudinal direction and can be fixed at an appropriate position in an exterior body. 2. The weight member according to claim 1, wherein the weight member is a ring-shaped member having an inner spiral portion which is connected to a spiral portion formed on an outer wall of the ink storage tube so as to be movable back and forth in a screwing relationship. Writing instrument. 3. An operation body having an extension portion into the exterior body having a spiral portion formed on an outer wall is connected to the exterior body so as to be rotatable in a circumferential direction with respect to the exterior body, and the weight member is A ring-shaped member having an inner spiral portion connected to the inner wall so as to be able to move back and forth in a screwing relationship with the spiral portion to the extending portion, and a rail portion extending in the longitudinal direction formed on the inner wall of the exterior body. The writing implement according to claim 1, further comprising a wing portion to be engaged, wherein the weight member is moved back and forth by rotating the operation body in a circumferential direction with respect to the exterior body.