JP2003300393A - Writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a writing utensil which increases its stable gripping sensation when the writing barrel is held by hand and thereby, makes the writer hardly wearisome even during a long time of writing. <P>SOLUTION: The writing barrel 12 is constituted of a hard part 20 and a soft part 22, and the soft part 22 includes a finger tip supporting region 12a with which the tips of a thumb, a forefinger and a middle finger normally come into contact and an interfinger part supporting region 12 with which the part between the thumb and the forefinger normally comes into contact, when the writer grips the writing barrel 12. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a writing instrument.

[0002]

2. Description of the Related Art In such a conventional writing instrument, a fingertip support portion of the writing shaft, which is a portion that comes into contact with a fingertip of a writer who holds the writing shaft, is made of a soft elastic material to prevent slipping. . Such a soft elastic material forms a cylindrical body that is separate from the portion of the writing shaft that is made of the hard material, and is configured by fitting the tubular body into the annular groove made of the hard material. Or utility model registration number 253
As described in No. 7274, it can be manufactured by simultaneously molding a writing shaft composed of a soft elastic material and a hard material by a two-color molding method, or by molding.

[0003]

However, at the time of writing, usually, the writing axis is mainly supported by the three thumbs, the index finger, and the middle finger, but not only that, but the writing axis is also supported between the fingers between the thumb and the index finger. It is supported from the bottom, and if that part is hard, there is a problem that it is easy to get tired when writing for a long time. The present invention has been made in view of the above problems, and an object of the present invention is to provide a writing instrument that can increase a sense of stability when holding a writing axis and can prevent fatigue even during long-time writing.

[0004]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is a writing instrument having a writing shaft having a hard portion and a soft portion, and grips at least the writing shaft. It is characterized in that a soft portion is provided at a finger-to-finger supporting portion of the writing shaft which is a portion that abuts between the thumb and the index finger of the writer. Since the soft part supports the space between the thumb and forefinger, the sense of stability when gripping the writing shaft is increased, and it is possible to prevent fatigue even during long-time writing.

According to a second aspect of the present invention, in addition to the first aspect, a soft portion is further provided at a fingertip support portion of the writing shaft which is a portion that comes into contact with a fingertip of a writer who holds the writing shaft. Characterize. Since the fingertips are supported by the soft part, the sense of stability when gripping the writing shaft is increased, and it is possible to prevent fatigue even during long-time writing.

Further, the inter-finger supporting portion can be provided at any portion which may come into contact between the writer's thumb and forefinger, and the invention according to claim 3 provides the invention. Alternatively, in the one described in 2, the writing instrument is provided with a clip extending in the axial direction parallel to the writing axis,
It is characterized in that the inter-finger supporting portion is provided at a position substantially facing the clip when viewed in the circumferential direction of the writing shaft. When there is a clip, the writer usually grips the writing shaft so as not to interfere with the clip. For this reason, by setting the portion that substantially opposes the clip as the inter-finger supporting portion, the soft portion can be reliably supported between the fingers. In addition, claim 4
The invention described in any one of claims 1 to 3 is characterized in that the soft portion has a streamlined shape in a side view. It is possible to combine the novelty of design.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. A first embodiment of the present invention will be described with reference to FIGS. This writing instrument 10 is a side knock type mechanical pencil, and a known lead feeding mechanism for feeding a lead is accommodated inside the writing shaft 12, and its operating portion 14 is provided at a central portion in the axial direction of the writing shaft 12. It is projected. By knocking the operation portion 14, the core, which is a writing medium, is fed out. The base 16a of the clip 16 is attached to the rear end side of the writing shaft 12, and the clip 16 has a base 1a.
6a extends parallel to the writing shaft 12 in the axial direction.

The writing shaft 12 includes a hard portion 20 made of a hard material such as ABS resin and acrylic resin, and soft elasticity such as silicone rubber, thermoplastic elastomer such as olefin elastomer, vinyl chloride elastomer and styrene elastomer. It is composed of a soft portion 22 made of a material. The hard portion 20 and the soft portion 22 can be molded at once by a method such as two-color molding.

The soft portion 22 is provided from the front portion to the central portion except the operating portion 14 of the writing shaft 12, and particularly when the writing shaft 12 is gripped by the writer, the soft portion 22 usually has a thumb, an index finger and a middle finger. Fingertip support part 1 which is hit by the fingertip of
2a and a finger-to-finger supporting portion 12b which is touched between the thumb and the index finger, and is provided so as to connect these portions 12a and 12b. When the clip 16 and the operating portion 14 are directed to the front, the fingertip support portion 12a has a total of three concavities and convexities formed by a number of lateral ribs on the back side and both side surfaces thereof. Further, the inter-finger supporting portion 12b is provided at a position where the centers thereof are separated by about 180 degrees when viewed in the circumferential direction of the clip 16 and the operating portion 14 and the writing shaft 12, in other words, at a position substantially opposite to each other, and the surface thereof is provided. On the surface, irregularities are formed by a large number of horizontal ribs.

In the writing instrument constructed as described above, when the writer writes, these are held upward so as not to interfere with the clip 16 and to easily knock the operating section 14. Since it is normal, the thumb, the index finger and the middle finger hit the portions of the fingertip support portion 12a where the unevenness is formed, and the inter-finger support portion 1
The portion between the concavities and convexities of 2b hits between the thumb and forefinger, and the writing shaft 12 is supported at these portions. Further, since the fingertip support portion 12a and the inter-finger support portion 12b are made of a soft elastic material, the feel given to the hand becomes soft, and a non-slip action can be provided to provide a stable feeling. Therefore, even if writing is continued for a long time, it is less likely to get tired.

When feeding the lead, these parts 12
This can be performed by, for example, moving only the index finger and knocking the operation unit 14 without completely releasing the hands from a and 12b. Further, since the soft part 22 is provided at the central portion in the axial direction of the writing shaft 12, the combination of colors of the soft part 22 and the hard part 20 should be changed to make the design novel. You can

Next, the second embodiment of the present invention will be described with reference to FIGS. 4 and 5.
An embodiment will be described. The same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. This writing instrument 30 is a rear end knock type mechanical pencil. In the rear end knock type mechanical pencil, an operating section 34 for feeding the lead is provided behind the writing shaft 32, and the operating unit 34 is connected to a lead feeding mechanism housed inside the writing shaft 32. By knocking the operation portion 34, the lead can be drawn out.

The writing shaft 32 is composed of two members, a front shaft 32A and a rear shaft 32B, which are joined by screwing or the like, and the surface of the writing shaft 32 is made of a hard material when viewed as a whole. The hard parts 40A, 40B and the soft parts 42A, 42B made of a soft elastic material are the same as in the first embodiment. The front shaft 32A is formed by fitting a tubular body made of a soft elastic material, which is the soft portion 42A, into an annular small-diameter portion provided in the central portion of the hard portion 40A. Further, in the rear shaft 32B, the soft portion 42B and the hard portion 40B are formed by two-color molding.

The soft portion 42A is provided so as to include a fingertip support portion 32a which the fingertips of the thumb, the index finger and the middle finger normally contact when the writer grips the writing shaft 32. The fingertip support portion 32a has a clip 16a. When is turned to the front, two side ribs are formed on both sides in total, and a large number of lateral ribs are formed on the surface. Further, the soft portion 42B is in a position where they are substantially opposed to each other when viewed in the circumferential direction of the clip 16 and the writing shaft 32, and the finger-to-finger support portion 3 where the fingers of the thumb and the index finger come into contact.
It is provided so as to include 2b, and unevenness is formed on the surface by a large number of horizontal ribs.

Also in the writing instrument 30 constructed as described above, similarly to the first embodiment, the writing instrument should hold these upwards so as not to interfere with the clip 16 when writing. Since it is normal, the fingertip support part 32
The thumb and forefinger touch the place where two concavities and convexities are formed in a, and the place between the thumb and forefinger touches where the concavity and convexity is formed in the inter-finger support part 32b, and the writing shaft 32 is supported at these parts. To be done. Then, it is possible to provide the same effect as that of the first embodiment.

A third embodiment of the present invention will be described with reference to FIG. The same parts as those in the previous embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. This writing instrument 50 is the second
Similar to the above embodiment, the rear end knock type ballpoint pen is used. In the rear end knock type ballpoint pen, the operation unit 5
By knocking 4 the tip of the refill that contains the ink, which is the writing medium, can be fed out.

The writing shaft 52 of the writing instrument 50 is composed of a hard portion 60 whose surface is made of a hard material and soft portions 62A and 62B made of a soft elastic material. The soft portion 62A is
It is made of a soft elastic material and is composed of a tubular body that is fitted into the annular groove of the hard portion 60, and is provided so as to include the fingertip support portion 52a that is normally touched by the fingertips of the thumb, the index finger, and the middle finger, and the entire surface thereof is in a lattice shape. Unevenness is formed. Further, the soft portion 62B is provided at a position substantially facing each other when viewed in the circumferential direction of the clip 16 and the writing shaft 52, and includes the inter-finger supporting portion 52b where the fingers of the thumb and the forefinger come into contact, and its surface is It has a gentle concave shape, and at the same time, irregularities are formed by a large number of lateral ribs. The writing instrument 50 configured as described above can also provide the same operational effect as that of the previous embodiment. In particular, since the inter-finger support portion 52b is concave, it is easy to fit between the fingers and the sense of stability can be further increased.

7 to 11 are perspective views showing the fourth to eighth embodiments, respectively. In the example shown in FIG. 7, the surface of the writing shaft 72 has a hard portion 73 and a soft portion 7.
4A, 74B, and cylindrical soft parts 74A and 7
4B are fingertip support parts 72a and inter-finger support parts 72, respectively.
It is fitted in the groove of the hard portion 73 so as to include b. In addition, in the structure shown in FIG. 8, the surface of the writing shaft 82 is composed of a hard portion 83 and a soft portion 84, and the soft portion 8
4 is provided from the front part to the middle part so as to include the fingertip support part 82a and the inter-finger support part 82b, and the part connecting the fingertip support part 82a and the inter-finger support part 82b is thin. ing.

The clip shown in FIG. 9 is a clip 1
6'is in the front part of the writing shaft 92. Similarly, in such a case, the surface of the writing shaft 92 is composed of the hard portion 93 and the soft portion 94, and the soft portion 94 is the fingertip support portion 9
It is provided from the front portion to the middle portion so as to include 2a and the inter-finger supporting portion 92b. The clip 16 ′ does not protrude from the outer surface of the writing shaft 92 and is substantially flush with the writing shaft 92 and extends in the axial direction in parallel with the writing shaft 92. The front end of the clip 16 ′ faces the inside of the writing shaft 92. By pressing, the rear end of the clip 16 'projects from the outer surface of the writing shaft 92 so that a pocket or the like can be clamped.

In the side-knock type writing instrument shown in FIG. 10, the surface of the writing shaft 102 is composed of a hard portion 103 and a soft portion 104, and the soft portion 104 has a fingertip supporting portion 102a and a finger gap. It is provided from the front portion to the middle portion so as to include the support portion 102b. The soft portion 104 is provided with a large number of concave portions, and the surface thereof has an uneven shape. Further, in the structure shown in FIG. 11, the surface of the writing shaft 112 is composed of a hard portion 113 and soft portions 114A and 114B, and the soft portions 114A and 1
14B respectively include the fingertip support portion 112a and the inter-finger support portion 112b, and the shape thereof is not cylindrical but has a peculiar shape such as a streamline shape in a side view.

As shown in FIGS. 7 to 11, various variations are conceivable, which not only give the writer a sense of stability when grasping the writing axis, but also have the novelty of the design.

[0022]

As described above, according to the present invention,
Since the soft part supports the space between the thumb and forefinger, the feel of the hand when gripping the writing shaft is soft and the back of the writing shaft does not sway due to the anti-slip action. It is gripped with a sense of stability. Also, the width of the design can be increased.

[0023]

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of a writing instrument of the present invention.

FIG. 2 is a front view showing the first embodiment.

FIG. 3 is a rear view showing the first embodiment.

FIG. 4 is a side view showing a second embodiment of a writing instrument of the present invention.

FIG. 5 is a front view showing a second embodiment.

FIG. 6 is a side view showing a third embodiment of a writing instrument of the present invention.

FIG. 7 is a perspective view showing a fourth embodiment of a writing instrument of the present invention.

FIG. 8 is a perspective view showing a fifth embodiment of a writing instrument of the present invention.

FIG. 9 is a perspective view showing a sixth embodiment of a writing instrument of the present invention.

FIG. 10 is a perspective view showing a seventh embodiment of a writing instrument of the present invention.

FIG. 11 is a perspective view showing an eighth embodiment of a writing instrument of the present invention.

[Explanation of symbols]

10, 30, 50 Writing instruments 12, 32, 52, 72, 82, 92, 102, 112
Writing axes 12a, 32a, 52a, 72a, 82a, 92a, 1
02a, 112a Fingertip support parts 12b, 32b, 52b, 72b, 82b, 92b, 1
02b, 112b Inter-finger support part 14 Operation part 20, 40A, 40B, 60, 73, 83, 93, 10
3,113 Hard part 22, 42A, 42B, 62A, 62B, 74A, 74
B, 84, 94, 104, 114A, 114B Soft part 16, 16 'clip

Claims (4)

[Claims] 1. A writing instrument having a writing shaft having a hard portion and a soft portion, and at least a finger-to-finger support portion of the writing shaft which is a portion that comes into contact between the thumb and the index finger of the writer who holds the writing shaft. Writing instrument characterized in that a soft portion is provided on the writing instrument. 2. The writing instrument according to claim 1, wherein a soft portion is further provided at a fingertip support portion of the writing shaft which is a portion that comes into contact with a fingertip of a writer who holds the writing shaft. 3. The writing instrument is provided with a clip extending in the axial direction parallel to the writing axis, and the inter-finger support portion is provided at a position substantially facing the clip as viewed in the circumferential direction of the writing axis. The writing instrument according to claim 1, wherein the writing instrument is a writing instrument. 4. The writing instrument according to claim 1, wherein the soft part has a streamlined shape in a side view.