JPH077192Y2 - Writing instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a writing instrument having a displaceable ink bottle with a tail plug formed by integrally molding an ink cylinder containing ink and a tail plug portion. .

(Prior Art) In a writing instrument using a cartridge-type ink cylinder, the ink in the ink cylinder is made to always flow to the writing end, and when the ink in the ink cylinder is consumed, it is replaced with a new ink cylinder.

Further, when using a batting type ink cylinder, the flow of the ink becomes unsmooth due to drying, and it is impossible to use a liquid ink having a pigment-based high viscosity.

Furthermore, the writing instrument in which the liquid ink is charged in the barrel is always made to flow to the writing end, and the writing instrument can be used until the liquid ink is consumed.

A writing instrument in which such a liquid ink is charged in the barrel is inexpensive as a disposable writing instrument, but there is a risk that the ink may leak during storage and transportation, and since the ink is constantly flowing at the writing end. The ink may dry and become faint during writing, or the liquid ink in the ink cylinder may deteriorate.

Particularly, a highly viscous pigment-based liquid ink is used, which smoothes the flow of the ink during writing, enables good writing without deterioration of the ink during storage and transportation, and is easy to operate and inexpensive.

Writing instruments that meet such demands are disclosed in Japanese Patent Laid-Open No. 59-84768 and Japanese Utility Model Laid-Open No. 63-884. However, in these devices, the comb tooth member is displaced rearward by the tip of the ink cylinder when the ink cylinder is removed for replacement.

(Problems to be solved by the invention) In order to replace the ink cylinder with the tail plug, the position of the comb-tooth member is adjusted by incorporating it when removing the ink cylinder.
There is a problem that it makes the ink flow to the writing edge unsmooth.

(Means for Solving the Problem) The present invention prevents the comb tooth member from being displaced when the ink cylinder with a tail plug is removed for replacement, and the ink cylinder part and the tail plug part are integrally molded. An ink cylinder with a tail plug is provided, a fitting hole continuing to the front end opening is formed in the front part, the ink cylinder guiding part with the tail plug is formed following the rear end opening, and the fitting hole and the ink with the tail plug are formed. A shaft cylinder formed with a step is formed in the boundary area with the cylinder guiding portion, and a comb tooth member having the ink cylinder insertion projecting cylinder portion at the rear is inserted into the fitting hole of the shaft cylinder, and the central portion is inserted. A displacement preventing member having a fitting hole at each apex is formed by forcibly press-fitting into the stepped portion to cause the biting portion to bite and contact the rear end of the comb tooth member, Brush tip made by attaching an induction core with the front end facing the writing end of felt tip, brush tip, ball, etc. to the neck cylinder The member is fitted and inserted from the front end opening of the shaft cylinder, and the induction core is extended into the ink cylinder insertion projection cylinder part of the comb-toothed member, and the front end of the ink cylinder part is exposed near the end of the ink cylinder insertion projection cylinder part. By mounting the ink cylinder with the tail plug on the ink cylinder guide portion with the tail plug,
Ink cylinder with tail cap is pushed by pushing the tail plug part and dropping the sphere that closes the ink cylinder part by the ink cylinder insertion projecting cylinder part inward to pass the liquid ink through the induction core to the writing end. The present invention provides a writing instrument in which the comb-tooth member is not displaced when the tooth is pulled out.

(Action) The tail plug part pushes the ink cylinder with the tail plug, inserts the comb cylinder member ink cylinder insertion projection cylinder part into the ink cylinder part, and drops the sphere to guide the ink in the ink cylinder part. It is possible to reach the writing edge through the core.

Further, since the ink cylinder with the tail plug is replaced, the comb tooth member is not displaced by the displacement prevention member even when pulled out from the ink cylinder insertion protruding cylinder portion, and the comb tooth member is maintained in the state at the time of adjustment setting. be able to.

(Embodiment) An embodiment of the writing instrument of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the shaft cylinder 1 has a front end opening 2 and a fitting hole 3 formed in the front part thereof, and a rear end opening 4 and an ink cylinder guide portion 5 with a tail plug formed in the inner surface thereof in the rear part. An ink cylinder 6 with a tail plug is mounted on the ink cylinder guide portion 5 with a tail plug.

The ink cylinder 6 with the tail plug is formed by integrally molding the ink cylinder portion 7 and the tail plug portion 8. The outflow port 7a of the ink cylinder portion 7 is blocked by the sphere 9 so that the ink cannot flow out. A lower neck portion 11 is formed on the occipital region 10.

Next, a comb tooth member 12 whose front end is exposed with a gap is inserted into the fitting hole 3 of the shaft cylinder 1, and the comb tooth member 12 has a projecting step portion 13 formed in the middle part thereof. The step portion 16 which is abutted against the step portion 14 of No. 3 and is fitted in the base portion of the ink cylinder insertion projecting cylinder portion 15 formed at the rear portion and which is formed in the boundary region between the fitting hole 3 and the ink cylinder guide portion 5 with the tail plug. The displacement prevention member 17 forcedly inserted into the fitting hole 3 adjusts the mounting position in the fitting hole 3 so that the displacement cannot be performed.
A guide lead insertion hole 18 extending from the front end to the rear end is provided, and a guide lead 20 of a writing end member 19 is extended in the guide lead insertion hole 18.

For example, as shown in FIGS. 2 and 3, the displacement prevention member 17 has a fitting hole 17a at the center and has a plurality of groove grooves 17b, 17b ... Biting part 17c, 1
7c, 17c is formed in a substantially triangular shape, and the fitting hole 17a is inserted into the ink cylinder insertion projecting cylinder part 15 and the biting parts 17c, 17c, 17c are strongly pushed into the step part 16 to make it bite. The comb tooth member 12 is abutted against the rear end face of the abutting step portion 13 of the comb tooth member 12 to set the assembling adjustment position of the comb tooth member 12.

The writing end member 19 is formed by inserting the rear end of the writing end 23 into the writing end insertion hole 22 of the neck cylinder 21 having a tapered outer circumference, and abutting the front end against the writing end 23 so as to face the writing end 23 and the insertion hole of the neck cylinder 21. It is composed of an induction core 20 which projects backward from 24 by a predetermined length, and in this case, the writing end 23 is a felt nib.

The ink cylinder 6 with the tail plug is located at a position where the front end of the ink cylinder portion 7 faces the rear end of the ink cylinder insertion / projection cylinder portion 15 of the comb-tooth member 12, and the lower neck portion 11 and the rear end surface 25 of the shaft cylinder 1. The distance between the ink cylinder 6 with tail plug is pushed and the ink outlet 7a
Insert the ink cylinder insertion projection cylinder part 15 into the
When the lower neck part 11 is brought into contact with the rear end surface 25 of the shaft cylinder 1, the front end of the ink cylinder part 7 comes into contact with the displacement preventing member 17, and the ink in the ink cylinder part 7 passes through the induction core 20 and the writing end. It is set to reach 23.

A cap 27 is detachably attached to the cap fitting insertion step portion 26 of the shaft cylinder 1.

The cap 27 has an inner cap 28.
28 has a rear end engaged with an engaging projection 29 of the cap 27, and a spring 30 is interposed between the top inner wall of the cap 27 and the shoulder 28a of the inner cap 28. When the ink is made to flow to the end 23 to enable writing, the inner cap 28 prevents the ink from evaporating and prevents the ink from drying.

FIG. 4 shows a related structure between the front end of the shaft cylinder 1 and the neck cylinder 21 of the writing end member 19, and 31 is an air hole.

Since the present invention is constructed as described above, as shown in FIG. 1, there is a small gap between the front end of the ink cylinder 6 with tail plug and the end of the ink cylinder insertion projection cylinder part 15 of the comb tooth member 12. If the ink cylinder portion 7 is closed by the spherical body 9 so that the ink cannot flow out, the ink does not leak or deteriorate during storage and transportation.

Then, the ink cylinder 6 with the tail plug is pushed to bring the lower neck portion 11 into contact with the rear end surface 25 of the shaft cylinder 1, and the ink cylinder insertion / projection cylinder portion of the comb tooth member 12 is attached to the front portion of the ink cylinder portion 7. When 15 is inserted and the sphere 9 is dropped, the ink in the ink cylinder portion 7 can be made to flow to the writing end 23 through the guide core 20, and writing is possible, and the cap 27 can be removed for writing.

Next, when the tail plug portion 8 is grasped and pulled out from the shaft cylinder 1 in order to replace the ink cylinder 6 with tail plug, the comb tooth member 12 is not displaced without the assembly adjusting position being changed.

That is, even if the outlet 7a of the ink cylinder portion 7 of the ink cylinder 6 with the tail plug is tightly inserted into the ink cylinder insertion projection cylinder portion 15 of the comb tooth member 12, the comb tooth member 12 is strong by the displacement prevention member 17. Since it is set so as not to be displaced, the comb tooth member 12 is not affected even if the ink bottle 6 with the tail plug is pulled out.

FIG. 5 is a cross-sectional view of a main part showing another example of the writing end member, which is a writing end member 33 which serves as a pen tip for using the writing end 32 in a fluorescent pen.
FIG. 6 is a cross-sectional view of a main part showing another example of the writing end member. The writing end 34 is a ball, and the writing end member 35 is in the form of an aqueous ballpoint pen with the tip of the induction core facing the ball 34.
In some cases, the writing edge may be used as a brush to make an applicator.
As the writing end, there are a felt tip, a fiber nib used for a fluorescent pen, a ball, a tip, and the like, and a writing end member in which these writing ends are selectively set can be adopted at any time.

(Effects of the Invention) In the present invention, since ink does not flow to the writing end unless the ink cylinder with a tail plug is pushed, there is no risk of ink leakage during storage and transportation, and the ink inside the ink cylinder deteriorates. Since it does not cause drying, etc., quality can be guaranteed,
In addition, the ink in the ink cylinder can be used completely, and the comb tooth member is not displaced when replacing the ink cylinder with the tail plug, so the built-in adjustment position of the comb tooth member remains unchanged and the function is retained. It has a number of practical effects such as can be done.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a writing instrument of the present invention, FIG. 2 is a perspective view of an example of a displacement prevention member, and FIG. 3 is an explanatory view showing a state in which the displacement prevention member is forcibly press-fitted into a step portion of a barrel. Fig. IV of Fig. 1
Fig. 5 is a cross-sectional view taken along line -IV, Fig. 5 is a cross-sectional view showing another example of the writing end member, and Fig. 6 is a cross-sectional view showing another example of the writing end member. 1 ... Axial cylinder, 2 ... Front end opening, 3 ... Fitting hole, 4 ... Rear end opening, 5 ... Ink cylinder guide part with tail plug, 6 ... Ink cylinder with tail plug, 7 ... Ink Cylindrical part, 8 …… Tail plug part, 12 ……
Comb-tooth member, 15 ... Ink cylinder insertion protruding cylinder part, 16 ... Step part, 17
…… Displacement prevention member, 18 …… Induction core insertion hole, 19 …… Brush end member, 20 …… Induction core.

Claims (1)

[Scope of utility model registration request] 1. An ink cylinder with a tail plug formed by integrally molding an ink cylinder part and a tail plug part is provided, a fitting hole continuing to a front end opening is formed in a front part, and the tail plug is connected to a rear end opening. A comb having an ink cylinder guide portion and a shaft cylinder formed with a step in the boundary area between the fitting hole and the ink cylinder guide portion with a tail plug, and a comb having the ink cylinder insertion projection cylinder portion at the rear portion. A displacement preventing member having a toothed member inserted into the fitting hole of the shaft cylinder and having a fitting hole at the center and forming a biting portion at each apex is forcibly press-fitted into the step portion and the biting portion. And abutment against the rear end of the comb-toothed member, and attaching a guide end member having a front end facing the writing end of a felt nib, writing brush, ball, etc. to the neck cylinder. The guide core is fitted through the front end opening of the shaft cylinder and extends into the ink cylinder insertion protruding cylinder portion of the comb-toothed member, and the front end of the ink cylinder portion is aforesaid. The ink cylinder with the tail plug is fitted to the ink cylinder guide part with the tail plug facing the end of the cylinder cylinder insertion and projection cylinder part, and the tail plug part is pushed to move the ink cylinder insertion and projection cylinder part. A writing instrument in which the sphere that closes the ink cylinder portion is dropped inward so that the liquid ink passes through the guide core to reach the writing end and the comb tooth member is not displaced when the ink cylinder with the tail plug is pulled out.