JP4724987B2 - Writing instrument - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a writing instrument in which a shaft body of a writing instrument is formed in a hollow shape to form an ink containing portion, and ink is directly filled in the ink containing portion.
[0002]
[Prior art]
In a writing instrument in which ink is directly sealed in the main body of the writing instrument, a configuration in which a belt-like transparent portion for observing the inside (ink) is formed on the outer peripheral surface of the writing instrument main body along the entire length direction is disclosed in JP-A-6-24194 It is disclosed. In this publication, when the entire circumference of the main body is made transparent, a small amount of residual ink remaining in the portion where the ink has been lost when the ink of the writing instrument is consumed becomes noticeable. It is described that the problem is solved by forming a long strip.
[0003]
However, the remaining amount of ink is usually confirmed after being used to some extent, and therefore it is not necessary to have a window for looking through the entire length. As a situation for checking the remaining ink amount, it is only necessary to be able to cope with the situation since writing is performed with the pen tip facing downward from the viewpoint of how much ink is present from the pen tip at the time of writing.
[0004]
Further, regarding the size of the window, it is more desirable that the size is very small. It is not necessary to provide a window over the entire length of the ink containing portion. If it is formed long over the entire length, there remains a problem that the trace of the residual ink (ink consumption) as described above appears as a stain.
The appearance of writing instruments is an important quality item in terms of product quality, and various decorations are usually added to the body of the writing instrument. From this point of view, the size of the window is the minimum necessary. It is preferable to set it as the magnitude | size.
[0005]
[Problems to be solved by the invention]
In the present invention, there is no problem that the window for observing the inside of the outer peripheral surface of the writing instrument shaft body in which the ink is directly encapsulated, the trace of residual ink (ink consumption) accompanying the consumption of the ink appears as dirt, Moreover, it aims at forming in the minimum required form so that the external appearance of the decorated writing instrument shaft may not be impaired.
[0006]
[Means for Solving the Problems]
The present invention was made in order to solve the above-mentioned problems, in the writing instrument formed by forming the ink storage part by making the shaft of the writing instrument hollow, and directly filling the ink in the ink storage part. A transparent window is formed in a substantially central portion or forward of the longitudinal full length of the shaft body, and the transparent window has a width dimension substantially equal to or smaller than the inner diameter dimension of the central portion of the longitudinal full length of the shaft body. In the writing instrument in which the ink container is formed by making the shaft body of the writing instrument hollow and the ink container is directly filled with ink, the length of the shaft body is approximately A transparent window is formed in the center or front, and the transparent window is formed of a side window and an all-around window connected to the side window. The ink container In the writing instrument formed by directly filling the ink containing portion with ink, a transparent window having a longitudinal dimension 1.0 to 2.0 times the outer diameter of the shaft body is provided at a substantially central portion of the longitudinal length of the shaft body. A third gist is that the transparent window is formed of a side window and an all-around window connected to the side window.
[0007]
【Example】
Embodiments will be described with reference to the accompanying drawings. FIG. 1 shows and describes the appearance of the writing instrument of the present invention. The shaft body A is provided with a cap C to which an indicator B for displaying the ink color is fixed. The cap C has a metal clip, but is an opaque resin injection-molded product. A transparent window D through which the inside of the shaft body can be viewed is formed at the center of the entire length of the shaft body A. The hatched portion in the figure is a transparent window D. The shaft body A has an opaque appearance except for the window D portion. FIG. 2 is an external view of the shaft C shown in FIG. 1 with the cap C removed and the shaft body A of FIG. The shaft body A includes a front shaft 1, a rear shaft 2, and a tail plug 3, and a ballpoint pen tip 4 made of metal or resin is fixed to a tip portion.
[0008]
The embodiment will be described in detail with reference to FIG. 3 (enlarged from FIG. 2 and shown in a partial cross-section, and the transparent window D is shown as seen from the front).
The front shaft 1, the rear shaft 2 and the tail plug 3 are injection-molded products made of polypropylene resin or polyethylene resin, and the front portion of the rear shaft 2 (hereinafter, the upper part in the drawing is called the front and the lower part in the drawing is called the rear). A small diameter portion 2a is provided, and a grip 5 such as a styrene elastomer or a polyolefin elastomer is fixed to the small diameter portion 2a. The front shaft 1 is a translucent injection molded product, and the rear shaft 2 is a transparent injection molded product. The tail plug 3 is translucent and the grip 5 is opaque.
[0009]
The shaft body A has a hollow shape, and an ink storage portion 6 is formed. The ink 7 is directly filled in the ink storage portion 6 and the ink 7 is sealed in the shaft body A behind the ink 7. A grease-like ink follower 8 is accommodated. In this example, a float 8 a is immersed in the ink follower 8. An air circulation hole 3a is provided at the rear end portion of the tail plug 3 that is press-fitted and fixed to the rear portion of the rear shaft 2.
[0010]
The rear shaft 2 is a transparent injection-molded product. Except for the transparent window D, the entire peripheral surface is decorated by a method such as film transfer printing, hot stamping, silk plate printing, or the like, and has an opaque appearance. The internal ink 7, the ink follower 8, and the float 8a are concealed so that they do not appear on the appearance. In FIG. 3, the area around the side window 9 and the hatched pattern are decorated. Although the rear part of the shaft body A is shown in a partial cross section in the figure, it has an appearance that is similarly opaquely decorated.
[0011]
The transparent window D will be described. The transparent window D is formed with a longitudinal dimension that is 1.0 to 2.0 times the outer diameter of the shaft body A at a substantially central portion or forward of the longitudinal length of the shaft body A. The ink 7 can be seen through the transparent window D. The longitudinal dimension of the transparent window D is difficult to see if it is smaller than the outer diameter of the shaft A so that the ink inside the shaft A can be viewed, and the outer diameter of the shaft A is not visible. If the size exceeds 2.0 times, the trace of residual ink (ink consumption) accompanying ink consumption will appear as dirt from the window.
[0012]
The transparent window D includes a side window 9 having a width dimension substantially equal to or smaller than the inner diameter dimension of the central part of the longitudinal length of the shaft A, and an all-around window connected to the side window 9. 9a. This is because it is advantageous in reliably forming an opaque decorative surface on the shaft A. The side windows 9 are arranged on two opposing positions of the shaft body A.
The ink-like follower 8 in which the grease-like ink follower or the float 8a is immersed is at least a rear position beyond the rear end of the transparent window D when the writing instrument is used for the first time. Is filled.
[0013]
Next, the operation will be described. According to the above-described configuration, the presence (existence or non-existence) of the ink 7 can be clearly seen through the side window 9 in use. Further, the ink 7 can be seen through the entire peripheral window 9a. Further, the presence of the ink 7 can be confirmed from the translucent front shaft 1 although it cannot be clearly seen like the side window 9. The transparent window D is limited to the minimum required longitudinal dimension of 1.0 to 2.0 times the outer diameter of the shaft A, and residual ink (ink consumption) accompanying the ink consumption from the window. The traces of this will not appear as dirt.
[0014]
The ink-like follower 8 in which the grease-like ink follower or the float 8a is immersed is at least a rear position beyond the rear end of the transparent window D when the writing instrument is used for the first time. Is not filled in the transparent window D before use. In addition, in a writing instrument, there is a case where the ink loses a little over time after the ink is filled until the first use, but the rear end position of the transparent window D is assumed in consideration of the amount of reduction over time. If set, the ink follower does not appear in the window D even after aging and aging.
[0015]
FIG. 4 is a partial cross-sectional view for explaining a state in which the writing instrument has been used (used up). The ink in the shaft body A is consumed, the grease-like ink follower 8 reaches the rear of the ballpoint pen tip 4, and the float 8a reaches the center of the entire length of the shaft body A so that it can be viewed through the transparent window D. . It is in a state where it can be confirmed that ink has run out.
[0016]
In addition to the above, various modifications can be made without departing from the gist of the present invention. The shape, number, and arrangement of the window D may be selected and set in various ways, and the present invention is applied not only to a writing instrument but also to an applicator having a similar mechanism, thereby providing the same actions and effects.
[0017]
【The invention's effect】
The present invention provides a writing instrument in which a shaft body of a writing instrument is formed into a hollow shape to form an ink containing portion, and ink is filled directly into the ink containing portion. And the transparent window has a width dimension substantially equal to or smaller than the inner diameter dimension of the central portion of the longitudinal length of the shaft body, and the shaft body of the writing instrument. In a writing instrument in which an ink containing portion is formed by forming a hollow shape, and ink is directly filled in the ink containing portion, a transparent window is formed at a substantially central portion or forward of the longitudinal length of the shaft body, and The second gist is that the transparent window is formed of a side window and an all-around window connected to the side window, and the shaft of the writing instrument is made hollow to form an ink containing portion. Fill the ink container directly with ink In the writing instrument, a transparent window having a longitudinal dimension 1.0 to 2.0 times the outer diameter of the shaft body is formed at a substantially central portion of the entire length of the shaft body, and the transparent window is a side window, Since it is the third gist that it is formed with the peripheral window connected to the side window, there is no problem that the trace of residual ink (ink consumption) accompanying the consumption of the ink appears as dirt, and The presence or absence of ink in the shaft can be observed through the transparent window without impairing the appearance of the decorated writing instrument shaft.
[Brief description of the drawings]
FIG. 1 is a diagram showing an appearance of a writing instrument according to the present invention.
FIG. 2 is an external view with a cap removed.
FIG. 3 is a partial cross-sectional view described in detail.
FIG. 4 is a partial cross-sectional view illustrating a state where the writing instrument has been used (used up).
[Explanation of symbols]
A shaft body B indicator C cap D transparent window 1 front shaft 2 rear shaft 2a small diameter portion 3 tail plug 3a air circulation hole 4 ballpoint pen tip 5 grip 6 ink containing portion 7 ink 8 ink follower 8a float 9 side window 9a all around window

Claims (6)

  In a writing instrument formed by forming a hollow shaft body of the writing instrument to form an ink containing portion, and directly filling the ink containing portion with ink, a transparent window is formed at a substantially central portion or in front of the longitudinal full length of the shaft body. In addition, the transparent window has a width dimension substantially equal to or smaller than the inner diameter dimension of the central portion of the longitudinal length of the shaft body. The writing instrument according to claim 1 , wherein the transparent window has a longitudinal dimension that is 1.0 to 2.0 times the outer diameter of the shaft.   In a writing instrument formed by forming a hollow shaft body of the writing instrument to form an ink containing portion, and directly filling the ink containing portion with ink, a transparent window is formed at a substantially central portion or in front of the longitudinal full length of the shaft body. And the transparent window is formed of a side window and an all-around window connected to the side window.   In a writing instrument in which the shaft body of the writing instrument is formed into a hollow shape to form an ink containing portion, and the ink containing portion is directly filled with ink, a shaft body outer diameter of 1.0 is provided at a substantially central portion of the longitudinal length of the shaft body. A writing instrument, wherein a transparent window having a longitudinal dimension of up to 2.0 times is formed, and the transparent window is formed of a side window and an all-around window connected to the side window.   The writing instrument according to any one of claims 1 to 4, wherein a grease-like ink follower or an ink follower in which a float is immersed is disposed behind the ink in the shaft body.   The ink-follower in which the grease-like ink follower or the ink follower dipped in the float is filled with the ink so that the ink follower is at a rear position at least beyond the rear end of the transparent window when the writing instrument is used for the first time. The writing instrument according to claim 5, wherein

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