JP2023007853A - Knock type writing instrument - Google Patents

Abstract

To provide a knock type writing instrument capable of performing delicate writing work by protruding a pen point of a pen refill selected during writing while being aligned with an axis.SOLUTION: A refill guide 2 having a guide hole for guiding the movement of a ballpoint pen refill 5 is arranged in a barrel 1. The guide hole is formed linearly or radially with an axis as a base point so that the ballpoint pen refill 5 can be moved back from an inner wall of the barrel 1 to a position on the axis. When not writing, the plurality of ballpoint pen refills 5 are stored in the barrel 1 in a state in which one ballpoint pen refill 5 is inserted into each guide hole along the inner wall of the barrel. A trigger 6 is arranged behind the ballpoint pen refill 5. The trigger 6 is formed so as to protrude out of the barrel 1 even after the ballpoint pen refill 5 is pushed from the inner wall of the barrel 1 onto the axis. A refill receiving portion 4 formed so as to support a rear end of the trigger 6 is arranged inside the rear of the barrel 1.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a writing instrument, and more particularly, a plurality of pen refills are housed in a barrel, and a desired pen refill is obtained by selectively knocking a slide lever connected to the rear end side of the pen refill. It relates to a knock-type writing instrument of a type that protrudes the nib of the pen.

2. Description of the Related Art Conventionally, multi-color pens that are provided with a plurality of ball-point pen refills of different colors and are selectively drawn out for use have been widely available. For example, various combinations of multicolor pens with ballpoint pen refills of different colors such as black, red, blue, green, etc., or multifunction pens including mechanical pencil refills have been commercialized.

A knock type and a rotary type are widely known as methods for selecting a desired refill from these multicolor pens or multifunctional pens. In a knock-type multicolor pen or the like, generally, a slide lever with a desired color is selected and pulled out with a fingertip to protrude the tip of the pen. In the case of a rotary type, there are known a twist type that goes back and forth to the left and right, and a rotary type that rotates 360 degrees and the pen tip appears and disappears in turn.

In these multicolor pens and the like, a plurality of pen refills are radially arranged at positions substantially inscribed on the inner surface of the barrel. When the pen refill is knocked or rotated, the pen tip moves along the inner wall of the tapered shaft cylinder to the axial center position, and the pen tip protrudes from the opening, making it ready for writing. It has become.

In the above-described arrangement, the pen refill itself is bent toward the tip of the barrel due to its flexibility, or the pen refill extends from the connection point with the slide lever, that is, from the vicinity of the inner wall of the barrel to the entrance, It was in a state of being tilted with respect to the axis of Therefore, the pen refill does not coincide with the axial center of the barrel, and the pen tip protrudes at a certain angle with respect to the axial center. Therefore, you may feel a sense of incongruity when writing.
In addition, since the pen tip protrudes obliquely from the opening, it is necessary to form the opening larger than that of a single-color knock-type pen. As a result, there is play between the pen tip and the opening, which is a hindrance when writing detailed drawings and delicate letters.

JP-A-2000-43478 Japanese Utility Model Laid-Open No. 1-85092 JP 2013-129069 A

Sied Lamp, “Revol pen, three-color ballpoint pen that does not tilt when writing”, [online], [searched on June 29, 2021], Internet <URL: https://www. wemake. jp/concepts/452>

To solve this problem, Patent Document 1 discloses that a rattling prevention portion is formed on the inner surface of the tip opening of the barrel, and the rattling prevention portion is in contact with the pen refill on the inner surface of the tip opening of the barrel to eliminate the rattling of the pen tip. ing.

However, even if the rattling prevention part is provided, the slanting state of the pen tip itself cannot be eliminated, so it is difficult to write and write delicate characters compared to a single-color pen. The problem remains that there is Further, in the case of a mechanical pencil refill, since writing pressure is applied while the pen tip is slanted, there is a problem that the lead of the mechanical pencil is likely to break.

In order to address this problem, Patent Document 2 proposes that, in order to allow the pen tip to be arranged perpendicularly to the writing surface, in a rotary writing instrument, the tip opening of the barrel is intentionally offset from the axis of the barrel and is eccentric, and an extension cam is used. It has been proposed to eliminate slanting of the nib by matching the apex of the tip to an eccentric barrel tip opening. However, since the nib of the pen is located at a position deviated from the axis when writing, it is difficult to wipe off a sense of incongruity compared to ordinary writing instruments.

Furthermore, in Patent Document 3, one of a plurality of holes is provided so as to overlap with the axis center for a pen refill guide hole arranged in the barrel, and is used as a guide hole for mechanical pencil refill, and for ballpoint pen refill. It has been proposed to place other holes along the inner wall of the barrel. Although this configuration solves the problem of the mechanical pencil, it does not solve the oblique protruding tip of the ballpoint pen refill.

The present invention has been made to solve the above problems. Each pen refill itself is moved onto the axis of the barrel, and the arbitrarily selected pen tip is protruded in a state aligned with the axis. To provide a writing utensil that enables delicate writing work.

According to a first aspect of the invention for solving the above problems, a refill guide having a guide hole for guiding the movement of the pen refill is arranged in the barrel, and the guide hole guides the pen refill through the inner wall of the barrel. It is formed linearly or radially around the axis so that it can be moved back to the position on the axis from the center. Each pen refill is inserted one by one, and a trigger is arranged behind each pen refill. The trigger is formed in a state of projecting out of the barrel even after the pen refill is pushed from the inner wall of the barrel toward the axial center, and is formed in the rear inner side of the barrel. Secondly, the gist of the present invention is a knock-type writing instrument in which a refill receiving portion formed so as to support the rear end of a trigger is arranged.

According to a second aspect of the invention for solving the above-mentioned problems, in the first aspect, a pen refill is provided on the inner peripheral surface of the barrel in the vicinity of the inlet/outlet port, the center of which coincides with the axis of the barrel, and the outer peripheral surface of the pen refill. The gist of the invention is that it is a knock-type writing instrument provided with a holding portion that presses against the.

A third aspect of the invention for solving the above problems is the first or second invention, wherein the plurality of pen refills housed in the barrel are refills filled with inks of different colors, or 1. The gist of the present invention is a knock-type writing utensil which is a ball-point pen refill having a ball rotatably held at the tip of a ball-point pen tip and having different diameters.

A fourth aspect of the invention for solving the above problems is a mechanical pencil in which at least one of the plurality of pen refills housed in the barrel in the first to third inventions functions as a mechanical pencil. The gist of the refills is that the remaining pen refills are ball-point pen refills filled with inks of different colors, respectively, or having balls of different diameters rotatably held at the tip of the ball-point pen tip.

A fifth aspect of the invention for solving the above problems is the first, second, or fourth aspect of the invention, wherein two or more of the plurality of pen refills housed in the barrel function as a mechanical pencil. A mechanical pencil refill, wherein each mechanical pencil refill is provided with standard caps and chucks corresponding to different lead lead thicknesses housed inside the mechanical pencil refill.

According to a sixth aspect of the invention for solving the above-mentioned problems, in the first or second invention, the plurality of pen refills accommodated in the barrel have an ink storage portion in which ink is stored. , a felt-tip pen refill having a nib made of felt, synthetic fiber or synthetic resin.

According to the above-described knock-type writing instrument according to the first aspect of the invention, the pen refill is positioned on the axis in parallel with the barrel, and the pen tip protrudes from the center of the barrel tip opening. It can be formed in a state in which there is almost no play with the inner peripheral surface of the inlet/outlet, and play is less likely to occur. And it works even if you store a rigid pen refill. The straight protruding tip of the pen eliminates discomfort during writing, and the absence of play has the effect of increasing the accuracy of writing.

According to the above-mentioned knock-type writing instrument according to the second aspect of the invention, the outer peripheral surface of the pen refill is pressed against the holding portion provided on the inner peripheral surface near the outlet so that the center coincides with the axial center of the barrel. The pen tip protrudes in the state. This further increases the stability of the pen tip, and reduces deformation and blurring of the pen tip even when writing with strong writing pressure. In addition, it is possible to provide a highly durable knock-type writing instrument for a writer who uses high writing pressure.

According to the above-mentioned retractable writing instrument according to the third invention, it is possible to provide a retractable writing instrument that can write in a plurality of types of colors or character widths with a single piece while having the functions according to the first and second inventions. be able to.

According to the retractable writing instrument according to the above-mentioned fourth invention, by applying the functions according to the first and second inventions to the mechanical pencil refill, the lead of the mechanical pencil protruding from the nib is laterally retracted. It is possible to provide a multifunctional pen with a mechanical pencil which is hard to apply writing pressure from any direction and whose lead is hard to break.

According to the retractable writing instrument according to the fifth aspect, it is possible to provide a multi-functional pen equipped with a plurality of mechanical pencil refills capable of writing various character widths without breaking even an ultrafine lead core.

According to the knock-type writing instrument according to the sixth invention described above, it is possible to provide a multicolor felt-tip pen having the functions according to the first and second inventions.

BRIEF DESCRIPTION OF THE DRAWINGS It is an example of the knock-type writing instrument which concerns on this invention, (a) is a front view, (b) is a top view. An example of a knock-type writing instrument according to the present invention, (c) is a cross-sectional view along the BB line in FIG. 1 (a), (d) is a cross-sectional view along the CC line in FIG. 1 (a), and (e) is a diagram 1(a) is a cross-sectional view taken along line DD. (f) is a sectional view taken along the line AA of FIG. 1(b). It is a schematic diagram showing the state of the pen refill of the knock-type writing instrument according to the present invention, (g) shows the non-writing state, (h) shows the writing state. 1 is a perspective view of an example of a knock-type writing instrument according to the present invention, with a part of a barrel notched. FIG.

An embodiment of the present invention will be described below with reference to the drawings. In the description of the drawings, the same reference numerals are given to the same elements or elements having the same function. However, the drawings are schematic, and the relationship between thickness and plane dimensions may differ from the actual one.In addition, there are parts where the relationship and ratio of dimensions are different between drawings. It should be noted that
In the following description, "front" means the side where the pen tip appears and disappears in the retractable writing instrument, and "rear" means the opposite side, that is, the side where the trigger (slide lever) is located. .

A knock-type writing instrument according to one embodiment of the present invention has an appearance as shown in FIG. That is, as shown in FIG. 1(a), the barrel 1 is formed by screwing together a front shaft 11 located forward and a rear shaft 12 located rearward. Three ball-point pen refills 5 are stored inside the barrel 1. - 特許庁A retracting opening 11a for retracting the tip of the pen is provided at the tip of the barrel 1, and a tail crown 8 is fitted to the rear end. A retractable opening 11a at the tip of the barrel 1 allows the pen tip of the ball-point pen refill 5 to protrude and retract for writing. A slide groove 12a is formed in the front-rear direction near the rear end of the rear shaft 12. As shown in FIG.

FIG. 2 is a cross-sectional view of the knock-type writing instrument of FIG. 1, and FIG. 4 is a perspective view with a part of the barrel cut away. As shown in FIG. 2( f ), the rear end of the ballpoint pen refill 5 is connected to the trigger 6 located behind the rear barrel 12 . As shown in FIGS. 2(f) and 4, a first trigger projection 6b and a second trigger projection 6c, which are part of the trigger 6, are positioned in the slide groove 12a so as to be able to slide back and forth. A refill receiving portion 4 is provided near the rear end in the rear barrel 12 so that the axis of the refill receiving portion 4 coincides with the axis of the barrel 1 .
A spring 7 into which the ballpoint pen refill 5 is inserted is interposed between the front of the ballpoint pen refill 5 and the rear end surface of the spring receiver 3 . The spring 7 always urges the ball-point pen refill 5 rearward.
As shown in FIG. 2(c), the triggers 6 are arranged radially within the rear axle 12 in plan view. The first trigger projection 6b of the trigger connected to the ball-point pen refill 6 in the non-writing state is positioned to face each other near the axis.
As shown in FIGS. 2(f) and 4, when writing, the trigger 6 of a desired ballpoint pen refill 5 is pressed with a fingertip or the like to move it forward in the axial direction. At this time, the trigger 6 is also pushed in the axial direction, and guided by a first guide hole 2a of a refill guide 2, which will be described later, the ballpoint pen refill 5 moves up to the axial center. It is pressed by the front end surface of the and receives the writing pressure. At the same time, the pen point protrudes from the opening 11a.
On the opposite side of the first trigger projection 6b and the second trigger projection 6c which are part of the trigger 6, that is, on the surface facing the outside of the barrel 1, as shown in FIGS. 1(b) and 2(c) A trigger step 6a is provided. When the trigger 6 is pressed with a fingertip or the like and the barrel-side surface of the trigger step 6a abuts against the outer peripheral surface of the barrel 1, the ballpoint pen refill 5 and the axial center are aligned.

As shown in FIGS. 2( f ) and 4 , a refill guide 2 is provided inside the rear barrel 12 . As shown in FIG. 2(d), the refill guide 2 is provided with a ballpoint pen refill 5 for guiding it laterally, that is, from the inner wall of the barrel to a position on the axis and in the vertical direction. is provided with a first guide hole 2a. The first guide holes 2a are three holes extending radially from the axis to the inner wall of the barrel in a plan view. be. The refill guide 2 may be formed integrally with the rear barrel 12 or may be formed as a separate member.
A spring receiver 3 is provided in the front portion of the front shaft 11 . As shown in FIG. 2(e), the spring receiver 3 is also provided with a second guide hole 3a similar to the first guide hole 2a in plan view.
In the conventional multicolor ballpoint pen, the holes through which the pen refills are inserted are provided in a circular shape with a slightly larger diameter than the outer peripheral surface of the pen refill, in the same number as the pen refills, and in an independent state. However, in the present invention, since the hole through which it is inserted is in a so-called through-hole state as described above, the whole from the rear end of the pen refill to the pen tip is It is possible to move up to the axis.
As shown in FIG. 3(g), the ballpoint pen refill 5 when not writing is positioned near the inner wall of the barrel 1 in parallel with the axis. When writing, the selected ballpoint pen refill 5 is positioned straight on the axis as shown in FIG.

As shown in FIGS. 2(f) and 4, on the inner peripheral surface near the outlet 11a, a holding portion 11b whose center coincides with the axial center of the barrel 1 and which presses against the outer peripheral surface of the ballpoint pen refill 5 is provided. . Although illustration is omitted, the holding portion 11b is composed of several vertical ribs. It is preferable that the rear end surface of the holding portion 11b is formed in a parabolic shape that opens rearward in vertical section so that the pen tip can move smoothly.
Since the tip portion of the ball-point pen refill 5 is held by the holding portion 11b, the blurring of the pen tip can be further reduced.
The holding portion 11b does not have to be a separate member from the front shaft 11, and the same holding effect can be obtained by forming the inlet/outlet port 11a portion of the front shaft 11 thick.

When switching the ball-point pen refill 5 used for writing to another ball-point pen refill 5, the trigger 6 of the ball-point pen refill 5 to be switched is pressed with a fingertip or the like to move it forward in the axial direction. At this time, the second trigger projection 6c that is part of the trigger 6 to be switched to the first trigger projection 6b that is part of the trigger 6 of the pen refill that is already in the writing state and is positioned on the axis. hits and is pushed outward together with the ballpoint pen refill 5 . As a result, the rear end surface of the trigger 6 is separated from the front end surface of the refill receiving portion 4, the previous ballpoint pen refill 5 is retracted, and the next pen tip protrudes from the opening 11a.

In the above-described embodiment, the number of ballpoint pen refills is three, but the number is not limited to this number, and the number can be increased or decreased as desired. However, considering the appropriateness of the inner and outer diameters of the barrel, the number of pen refills per writing instrument is preferably 2 to 5.

The three ballpoint pen refills in the above-described embodiment are multicolor ballpoint pens filled with inks of different colors. Ballpoint pen refills with different diameters may also be used. By providing a variety of ball diameters, the effect of the present invention, in which the pen tip is stable and enables precise writing, can be exhibited in terms of different thicknesses of writing.

(Other embodiments)
In the above embodiment, the pen refill is a ballpoint pen refill, but it may be a mechanical pencil refill.
A mechanical pencil refill is configured to operate a lead lead feeding mechanism and feed a lead lead by pressing a trigger connected thereto in the direction of the distal end of the barrel. When two or more mechanical pencil refills are stored, each of the mechanical pencil refills is configured as a mechanical pencil refill equipped with a standard mouthpiece and chuck corresponding to different lead lead thicknesses. In the mechanical pencil housed in the conventional multi-functional pen, the lead core protrudes obliquely from the entrance and exit port, so it was easy to break. . Furthermore, when lead leads with different character widths are accommodated, a single writing instrument can be used to write different types of lines like drafting.

Alternatively, the pen refill may be a felt-tip pen refill having an ink reservoir in which ink is stored and a nib made of felt, synthetic fiber or synthetic resin. The felt-tip pen refill ink preferably has a function of absorbing moisture in the air to prevent drying. When using a plurality of different felt-tip pens, it is troublesome to open and close the respective caps. In addition, depending on the performance of the ink, the cap may not be required, and the troublesomeness of opening and closing may be reduced or eliminated.
Furthermore, the pen refill may be configured by any combination of a ballpoint pen refill, a mechanical pencil refill, and a felt-tip pen refill. By storing refills for electronic pens and correction pens as other pen refills, it is possible to make one writing instrument with more functions.

As described above, the embodiments of the present invention have been described. The structure, arrangement, etc. are not limited to those described above.

1 barrel 11 front shaft 11a entrance 11b holding portion 12 rear shaft 12a slide groove 2 refill guide 2a first guide hole 3 spring receiver 3a second guide hole 4 refill receiving portion 5 ballpoint pen refill 6 trigger 6a trigger step 6b first trigger Projection 6c Second trigger projection 7 Spring 8 Tail crown

Claims (6)

A refill guide having a guide hole for guiding the movement of the pen refill is disposed in the barrel, and the guide hole is positioned at the axis so that the pen refill can be moved back from the inner wall of the barrel to a position on the axis. is formed linearly or radially with the
When not writing, a plurality of pen refills are accommodated in the barrel with one pen refill inserted into each guide hole along the inner wall of the barrel,
A trigger is arranged behind each pen refill, and the trigger is formed in a state of projecting out of the barrel even after the pen refill is pushed axially from the inner wall of the barrel,
A knock-type writing instrument, characterized in that a refill receiving part formed so as to be able to support the rear end of the trigger is disposed inside the rear of the barrel. 2. The knock type according to claim 1, wherein a holding portion whose center coincides with the axial center of the barrel and presses against the outer peripheral surface of the pen refill is provided on the inner peripheral surface of the barrel in the vicinity of the inlet/outlet port. Writing instrument. The multiple pen refills housed in the shaft cylinder are refills filled with ink of different colors, or ballpoint pen refills with balls of different diameters rotatably held at the tip of the ballpoint pen tip. The knock-type writing instrument according to claim 1 or 2. At least one of the plurality of pen refills housed in the barrel is a mechanical pencil refill that functions as a mechanical pencil,
The rest of the pen refills are ball-point pen refills filled with inks of different colors, respectively, or ball-point pen refills having balls of different diameters rotatably held at the tip of the ball-point pen tip. Retractable writing instrument. Two or more of the plurality of pen refills stored in the barrel are mechanical pencil refills that function as mechanical pencils,
5. The mechanical pencil refill according to claim 1, 2 or 4, wherein each mechanical pencil refill is provided with a base and a chuck of a standard corresponding to different lead lead thicknesses accommodated inside the mechanical pencil refill. Retractable writing instrument. A claim characterized in that the plurality of pen refills housed in the shaft cylinder are felt-tip pen refills having an ink reservoir in which ink is stored and a nib made of felt, synthetic fiber or synthetic resin. 3. The knock-type writing instrument according to Item 1 or 2.

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