JPS6015479B2 - ballpoint pen - Google Patents

Description

[Detailed description of the invention] This invention relates to improvements in ballpoint pens.

As is well known, Asian people, especially the Japanese, have been writing beautiful characters since ancient times using the extremely soft writing brush known as a calligraphy brush.

However, since the Meiji era, hard brushes such as pencils, pens, and fountain pens have been used, but even though these new writing odors are called hard brushes, they have the property of preserving a fairly brush-like touch when used. . However, as a result of the recent use of ballpoint pens since the beginning of 208, the Japanese stroke style, especially among young people, has become noticeably stiffer. From the standpoint of preserving tradition, it is said to be a very regrettable phenomenon.

In addition, it is necessary to take several slips at once with a ballpoint pen, and the pressure of the pen becomes even stronger, and not only is the cursive style of calligraphy writing even more rapid, but the so-called Even a disease of the hands called ballpoint pen disease has become more common. Therefore, the purpose of the present invention is to relieve the disadvantages caused by such ballpoint pens, and in unavoidable cases such as creating slips, the tip of the ballpoint pen is substantially inelastic, like a carbide brush, as well as a follower. Although supported by
At other times, the tip is supported elastically, preserving the touch of the brush stroke and reducing the pressure of the pen that causes ballpoint pen disease.When it is inconvenient, the tip can be completely submerged into the ball barrel. To provide a ballpoint pen which can be retracted into a cap and used as a capless type.

The gist of the present invention to achieve the above object is as stated in the claims set forth in the header.

Referring to the drawings, several preferred embodiments of the present invention will be explained in detail below. Fig. 1 is a partially sectional side view schematically showing the main parts of the ballpoint pen of the present invention, and 1 is the center core; , consists of a combination of a chip part 2 and an elastic plastic part 3 in the form of a hollow pipe.

It goes without saying that a ball is rotatably supported at the tip of the tip 2 as is well known. Reference numeral 4 forms a closed portion at a tapered front end portion of a shaft tube 8 made of metal or synthetic resin.

In FIG. 1, the position A indicated by a solid line indicates the center/long exposure position where the entire tip 2 and a part of the elastic plastic part 3 are exposed outside from the tapered tip 4, and the two-dot chain line The position B indicated by the imaginary line indicates the center/short exposure position where only the tip tip (the conical part of the tip 2) is exposed from the tapered tip 4, and is also The position C shown in the left hand indicates the fully retracted position of the tip 2, that is, the position where the tip 2 is completely drawn into the hollow space of the barrel tube 8 and held in a state where writing is impossible.

In conventional ballpoint pens, those in which the center core 1 can be held between the A position and the C position, or between the B position and the C position are known as capless type pens. There is no known device that can selectively hold the center core 1 directly in the 3rd position of B and C with a single ballpoint pen. One embodiment of such a mechanism for selectively moving and holding the core 1 to any of the three positions A, 8, and C will be described with reference to FIGS. 2 through 5.

In these figures, reference numeral 5 denotes a butt end, and the rear end portions of the core 1 are fixed to each other by press-fitting and are integrated.
The butt 5 itself is integrally formed by a center portion 6, an outer peripheral portion 7, and a ring-shaped butt latching portion 12 connecting the two. The situation in which the butt 5 is slidably mated to the rear end of the rat tube 8 is clearly shown in the partially sectional side view shown in FIG.

Although FIG. 2 shows only the rear end of the shaft cylinder 8 in a slanted view, it is for convenience's sake to clearly explain that the combination with the butt 5 described above is achieved by insertion and rotation. Contrary to the case of FIGS. 1 and 3, the rear end of the barrel 8 is drawn on the left side in FIG. 2, and the front end is on the right side in FIG. 2. Reference numeral 9 denotes a guide groove formed in the shape of a double key hand at the rear end of the bag tube 8, two of which are arranged in a symmetrical arrangement with respect to the diameter of the bag tube 8. be.

Reference numeral 11 denotes a horizontal groove for fixing the butt end extending in a direction perpendicular to the axis and communicating with the guide groove 9.

Reference numeral 13 denotes a conventional ventilation hole provided in the butt 5 (see FIG. 5).

In addition, in the figure, these parts 9, 10, and 11 that are parallel to the center line of the ballpoint pen are designated as 1 to avoid confusion in the illustration.
Only one is marked. In this first embodiment, in order to attach the combined body of the core 1 and the butt 5 to the shaft tube 8, the tip 2 of the core 1 is placed first, and the inside is inserted from the rear end of the hollow bream tube 8. The tip 2 is made to protrude forward from the opening of the tapered tip 4 of the ball tube 8.

Just at this time, the butt 5 touches the rear end of the barrel tube 8, so slightly turn the butt 5 together with the center core 1, and the ring-shaped butt butt 12 will be attached to the double key hand. When the guide groove 9 is brought to a position corresponding to the entrance gate 10 of the pair of guide grooves 9 forming a shape, it hits the horizontal groove of the first stage and stops. This position corresponds to center-center long exposure position A (see FIG. 1). When writing with a ballpoint pen in this state, the tip 2 of the core 1 retains its elasticity, ensuring a soft penetrating feel. Next, Marizutsu 8
Hold it in your left hand and operate the butt end 5 with your right hand, turn it slightly clockwise as shown in Figure 2, push it in the forward direction, and then turn it slightly clockwise again. The butt butt latching part 12 gets stuck in the groove where it is located,
The core 1 and the butt 5 stop at that position.

This position is the center-center short exposure position B. When the center core 1 is placed at this position B, only the triangular tip of the tip 2 is exposed from the barrel tube 8, so in this state, you can write with a ballpoint pen using a pure hard brush stroke. I can write.

Next, turn the butt 5 slightly counterclockwise, then move it forward, and when it hits the horizontal groove 11, turn it slightly counterclockwise again, so that the butt butt 12 is locked by the final horizontal groove 11. The tip 2 of the core 1 is held at its fully retracted position C. To bring it from C to B again, and again from B to A, the above-mentioned operation can be performed in reverse.

Next, the second embodiment shown in FIGS. 6 to 9 will be described in detail.

In this case as well, 1 is the center core, and 5 is the butt that is press-fitted therein.

In this example, the butt 5 is provided with a tweezers-shaped incision 14 from its left end to approximately the center in FIG. 8, as clearly shown in FIG. Due to the presence of the incision 14,
A pair of window hooks 15 formed at the front part always have elasticity in the outward opening direction.

The ball tube 8 has a pair of window holes 15' and 16 each, which are the butt fixing parts.
', 17' are arranged with their positions shifted in the axial direction.

Figures 6 and 7 show the butt 5 from the rear of the ball tube 8.
0 is inserted into the guide groove 18 with 0, and it is shown in the state where it is immediately slid and pushed in, and FIGS.
The figure shows a state in which the window hook 15 is engaged with the window hole 15' by rotation, and the butt 5 is fixed at the position corresponding to A in FIG. To release from the engaged position in this state, turn the butt 5 in the opposite direction to the above (clockwise in Fig. 7).
The oblique part 1 where the window hook 15 is right next to the window hole 15'
7 (indicated by three window holes 15', 16', and 17'), the engagement and disengagement can be performed smoothly. To engage the positions B and C in FIG.
8, and then partially rotate the butt 5 to engage the window hole 16' or 17'.
Or it is locked in the position corresponding to C.

The engagement and disengagement may be carried out in accordance with the operation explained for the position corresponding to A above. In the second embodiment, since the guide groove 18 is located inside the bag tube 8, the ballpoint pen not only has a more beautiful appearance than the first embodiment, but also has a relatively solid structure. 10 to 13 show a first reference example which is outside the gist of the present invention.

In these figures, the rear part of the shaft cylinder 8 is cut out into a roughly rectangular shape, and the butt fixing part 1 is arranged approximately in a line in the longitudinal direction of the shaft center axis.
1 is provided, and 19 is a knob provided on the outer periphery of the butt 5 which is the core fixing portion into which the core 1 is press-fitted, and a butt end hooking portion 12 is also provided. Since the butt latching part 12 is provided with the through hole 20 in the center, it generates an elastic restoring force in the outward direction, and is tightly engaged within the butt fixing part 11 and does not easily come off. In this first reference example, the butt fixing part 11 has a semicircular shape with a through hole 20, but of course it can also be fixed in a rectangular shape with a through hole. Such an embodiment is simple and easy to understand. However, it is difficult to set the three positions A, B, and C fixedly. FIG. 13 shows a second reference example, in which a butt 5, which is a core fixing part, is provided with a bolt-shaped part 21 into which a core 1 is inserted, and is pivoted to a hole threaded part 22 at the inner rear part of the ball tube 8. This is what I wore.

In this reference example, the structure and operation are simple, and the center core can be finely adjusted. But the operation is not positive. Figures 14 and 15 show a third reference example, and 5 has a semicircular protrusion 23 at the rear of the outer periphery,
It has a hole threaded part 22 on the inside, and a threaded bolt-like part 21 is equipped with a slider 24 with a core press-fitted at its tip, which is a buttock that is a center fixing part.

If the rigging butt 5 is strongly pressed against the rear part of the shaft cylinder 8, the two will be rotatably joined.

The one in this example has a sleek appearance, does not come off even under strong pen pressure, and allows fine adjustment of the center position. Figure 16~
FIG. 18 shows a fourth reference example, in which 24 has a pair of hemispherical protrusions 25 on the rear part of the outer periphery and a semicircular protrusion 23 on the front part rotated 90 degrees, into which the center core 1 is inserted. This is a slider with an incision 14 halfway down to make it easier.

A semicircular protrusion 23 can be inserted into the guide groove 18 at the rear of the shaft cylinder 8, and the butt 5, which is a central core fixing part, is rotatably iron-coupled to the rear of the shaft cylinder 8 for guiding. The book has a spiral groove 26, and as the slider 24 rotates, the slider 24 into which the center core 1 is press-fitted is arbitrarily transferred back and forth.

To assemble, press the butt 5 firmly against the scale tube 8, and the shaft tube 8
An annular protrusion 28 on the inside of the butt 5 rotatably competes with an annular groove 27 provided on the rear outer periphery of the abutment.

This fifth embodiment allows fine adjustment of the degree of odor emitted from the core, and is smarter and easier to operate. In the fifth reference example shown in FIGS. 19 to 23, butt fixing parts 11 are provided at appropriate positions on both sides of the guide hole 9 which has a closing part 10 at the rear end of the ball tube 8.

After insertion, the butt 5, which is the central core fixing part, is exposed outside the shaft tube 8.
The finger receiving part 29 has an incision part 14 extending close to the bottom part 30 as if it were separated from the other outer peripheral part of the butt 5, so that an elastic restoring force is generated.
It is firmly engaged with the butt fixing part 11.

A protruding butt latching part 12 is provided on both sides of the tip of the finger receiving part 21, and the butt 5 into which the core 1 has been inserted enters the guide hole 9 through the entrance part 10. When removing the butt 5 from the butt latching part 12, it can be removed by pushing down the front part of the finger receiving part 29. This embodiment is simple to operate, durable and beautiful.

Figures 24 and 25 show a sixth reference example, in which 24 is a slider with a core 1 inserted at its tip, and a hemispherical protrusion 25 at the rear.
The two legs of the butt 5 are rotatably fitted to the rear part of the shaft cylinder 8 in a spiral groove 26 which is a core fixing part provided inside the rear part of the shaft cylinder 8. It moves as it rotates while being sandwiched between the parts 81.

This reference example is smart and easy to structure and adjust.

FIGS. 26 and 27 show a seventh reference example, and 8 shows a detachable taper 83, which is a central core fixing part, provided with a spiral groove 26 inside, rotatably iron-coupled to the front part. This is a shaft cylinder with a guide groove 18 provided at the rear and a butt 5 mounted thereon. The core 1 has a core stopper 32 at the front and a semicircular protrusion 2 at the rear.
A slider 24 having a diameter of 3 is press-fitted therein. If the attachment/detachment taper 83 is rotated, the core 1 will move. This reference example is
You can make fine adjustments without changing hands, and it's smart. 28 to 34 show an eighth reference example, in which a hemispherical protrusion 2
5, a spiral groove 26 is provided on the inside, and a butt 5, which is a central core fixing part, is rotatably iron-fitted to the rear of the shaft cylinder 8. be.

Reference numeral 18 denotes a guide groove for guiding the center neck stopper 32 provided in the ball tube 8.

This embodiment takes advantage of the characteristics of the core having a hook at the front, and has good compatibility with subordinate products and is easy to fine-tune. Of these, even when a semicircular protrusion 23 is provided directly at the rear of the core 1 as shown in FIGS. 30 and 31, the operation is similar to that of the above embodiment, and the slider 24 is not required. do. In this case, the butt part, window hook, spiral groove,
The numbers of semicircular protrusions, legs of the butt, etc. are not necessarily as shown in the drawings, and the center cores other than those shown in FIGS. 26 to 34 are shown without a hook in the front. Even if there is one, the same effects can be achieved by slightly changing the structure and arrangement of related parts accordingly.

Further, the use of a spring or the like to quickly move the core in and out is not consistent with the spirit of the present invention.

Furthermore, if the exposed front part of the core is unsightly due to design reasons, it can be made very beautiful by using a dark-colored material, painting it, or attaching a soft cap for the tip of the core that does not affect elasticity. Become. When the front part of the core of the ballpoint pen configured as described above is extended from the tapered tip to the long exposure position A, the core itself becomes elastic due to the pressure of the pen, and a soft pressure of the pen is obtained. Normally, the rear end of the tip and the tip of the taper should be about 8 skins, but if you increase the number of hooks, bolt-like protrusions, spirals, etc., and extend the ship over 2G, you can obtain the softness of a brush.

Furthermore, if the tip is located at the tapered end opening, it will provide a hard writing feel, and if it is retracted from the tip end opening, a cap will be unnecessary. As explained above, the present invention has a simple structure and operation in which the front part of the core is taken out from the taper tip opening and fixed, and a soft writing feeling can be obtained. Furthermore, it can be used with the same hard writing quality as the secondary product and does not require a cap.

In addition, in the gist of the present invention, the term ``a detachable female/male locking mechanism'' refers to the male type in which the ``ring-shaped butt latching part 12'' is provided on the butt 5 in the first embodiment. ``Double key hand-shaped guide grooves 9, 10, 11''
is a female member provided in the bag tube 8.

Further, in the second embodiment, the window hook 15 includes a male member, the closing portion 10, the guide groove 18, the window holes 15', 16', 1
7' is a female member.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the approximate required position of the center core, where A shows a soft writing feeling, B shows a hard writing feeling, and C shows a state where a cap is not required. Fig. 2 is a perspective view of the rear part of the shaft cylinder, Fig. 3 is an explanatory view with a part of the rear part of the pole ben cut away, and Fig. 4 is a plan view of the butt.
Figure 5 is a partially cutaway side view of the butt, Figure 6 is
Figure 7 is a partially cutaway plan view of the rear part of the ballpoint pen with the butt inserted, Figure 7 is a sectional view taken along A'-A', and Figure 8 is a view of the ballpoint pen after the butt has been rotated 90 degrees. 9 is a cross-sectional view taken along B'-B', FIG. 10 is a plan view of the rear part of the ballpoint pen, and FIG. Figure 12 is a C-C sectional view, the first
Figure 3 is an explanatory diagram with a part of the ballpoint pen cut away, No. 14
The figures are a D-D sectional view, FIG. 15 is an explanatory diagram with a part of the rear part of the ballpoint pen cut away, FIG. 16 is an explanatory diagram with a part of the rear part of the ballpoint pen cut away, and FIG. 17 is an E- E cross section, 1st
Figure 8 is a side view of the slider with the core inserted, and Figure 19 is
Figure 20 is a partially cutaway plan view of the rear part of the ballpoint pen, Figure 21 is a left side view of the butt, and Figure 22 is a front view of the rear part of the ballpoint pen. F sectional view,
Fig. 23 is a right side view of the butt, Fig. 24 is an explanatory view with a part of the rear part of the ballpoint pen cut away, Fig. 25 is a cross-sectional view taken along line GG, and Fig. 26 is a partial view of the front part of the ballpoint pen. Fig. 27 is an explanatory drawing showing a part of the rear part of the ballpoint pen cut away; Fig. 28 is an explanatory drawing showing a part of the rear part of the center core into which a slider has been inserted; Fig. 29 is the right side view of Fig. 28,
Figure 30 is an explanatory diagram with a part of the rear part of the center core cut away;
Figure 1 is a right side view of Figure 30, Figure 32 is an explanatory diagram with a part of the front part of the ballpoint pen cut away, Figure 33 is a cross-sectional view of the ballpoint pen, and Figure 34 is the rear part of the ballpoint pen. An explanatory diagram with a portion cut away. 1...Central core, 2...Tip, 3...
・Magnetic plastic part, 4...7-Pa tip opening, 5.
...Butt, 6...Center, 7...
・Outer peripheral part, 8... shaft cylinder, 9... guide hole, 10... opening □ part, 11... butt fixing part,
12...Butt latching part, 13...Air circulation opening, 14...Incision part, 15...Window hook, 16... Window hole, 17... anuscline part,
18... Guide groove, 19... Knob, 20...
...Through hole, 21... Bolt-shaped part, 22...
... Hole screw part, 23 ... Semicircular projection, 24 ... Slider, 25 ... Semispherical projection, 26 ...
Spiral book, 27... Annular groove, 28...
...Annular projection, 29...Finger rest, 30...
...Bottom part, 31... Leg part, 32... Core hooking part, 33... Attachment/detachment taper. F horsetail 1F 3 F "4 F 7 points. Now F 2 F ・ Za F . 6 F body 8 Ft 8. 2 Keto 27 FL Gu ・ 28 F grandmother ・ 2 F ・ 30 F `` 3l F e 3 F effort 1O F multi-r' F fee 2 F go-13 Fi8.l4 F body. 20 F body 22 F body-23 F is 4 F is .2 Rakofu.32

Claims (1)

[Claims] 1 The butt, which is fitted to the distal end of a hollow tubular core with a ballpoint pen tip at its tip, partially rotates and slides against the barrel, resulting in three different shapes in the longitudinal direction on the barrel. A female/male type locking/unlocking mechanism is provided to cooperate with the butt and barrel, allowing the ballpoint pen tip to be moved between the center core/long exposure position A and the center core/short exposure position. A ballpoint pen characterized in that it can be selectively held in a position B and a fully immersed position C.