JP3611221B2 - Writing utensils - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to safety due to accidental ingestion of a separable mouthpiece attached to the tip of a shaft tube of a writing instrument.
[0002]
[Prior art]
Although extremely rare, there has been an accident in which an infant swallows a cap and suffocates, and measures have been taken to allow air to flow even if swallowed by the cap of a writing instrument.
In general, a tip such as a mechanical pencil (metal is called a base and a plastic one is called a mouthpiece) is screwed into the tip of the shaft cylinder to eliminate clogging due to breakage of the core. And can be easily separated. Moreover, since the lead is inserted, there is no ventilation means. Further, even when the lead is not inserted, the hole is small, so there is no ventilation to avoid suffocation.
[0003]
[Problems to be solved by the invention]
The present invention is directed to a writing instrument that is often touched by an infant.
In separable proboscis member attached to the distal end of the barrel of the writing instrument, it is to St. prevent accidents suffocation like by providing a sufficient air circulation means when the infant had crowded drink Unfortunately .
[0004]
[Means for Solving the Problems]
In the separable mouthpiece attached to the tip of the shaft of the writing instrument, there is provided a vent hole that communicates the inner hole from the vicinity of the tip to the rear end attached to the shaft, apart from the hole protruding from the writing tip. and air circulation is possible to prevent an accident of suffocation, such as when the infant had crowded drink Unfortunately.
[0005]
【Example】
1 to 4 show a first embodiment of the present invention. The present embodiment is a mechanical pencil and has a known basic structure, and a detailed description will be omitted and only the gist will be described. 2 to 3 show the mouth portion 4 thereof. The tip portion 4 is a resin molded product, and a plurality of ribs 5 are formed circumferentially at a required location ahead of the inner hole 4a, and the inner hole 4a is communicated with the tip between the ribs. 6 is provided.
A holding chuck 7 made of an elastic material such as rubber is attached to the center of the rear of the rib 5. Further, if necessary, a retaining projection or the like is formed at a required position of each rib so that the holding chuck 7 does not fall off. (Not shown)
Further, a tip pipe 8 through which a core is inserted is press-fitted into the front center portion of the rib 5. Thus, the vent hole 6 is formed through the tip end surface of the tip portion 4 to the inner hole 4a. The vent hole is formed to have a cross-sectional area necessary for air flow.
[0006]
5 to 7 show the tip 20 of the mechanical pencil according to the second embodiment. The tip portion 20 is a resin molded product, and a plurality of ribs 21 are formed circumferentially at a required portion ahead of the inner hole 20a, and a vent hole communicating the inner hole 20a and the tip between the ribs. 22 is provided.
A holding chuck 24 made of an elastic material such as rubber is attached to the center of the rear of the rib 22. Further, if necessary, a retaining protrusion or the like is formed at a required position of each rib so that the holding chuck 24 does not fall off. (Not shown)
Further, a cylindrical portion 25 having a core insertion hole 23 is formed at the front center portion of the rib 22.
[0007]
8 to 10 show a tip part 30 of a mechanical pencil according to the third embodiment. The tip portion 30 is a resin molded product, and a plurality of ribs 31 are circumferentially formed at a required portion ahead of the inner hole 30a, and a vent hole that communicates the inner hole 30a and the tip between the ribs. 32 is provided.
A holding chuck 34 made of an elastic material such as rubber is attached to the rear center portion of the rib 31. Further, if necessary, a retaining protrusion or the like is formed at a required position of each rib so that the holding chuck 34 does not fall off. (Not shown)
Further, a core insertion hole 33 is formed at the front center portion of the rib 31.
[0008]
[Action]
It proboscis tool configured writing instrument as described above, off-axis cylinder, which air flow when the infant had crowded drink Unfortunately.
[0009]
【The invention's effect】
The present invention relates to a separable tip attached to the tip of a writing tube shaft, and a ventilation hole communicating the inner hole from the vicinity of the tip to the rear end attached to the shaft tube separately from the hole protruding from the writing tip. because is provided, accident of suffocation or the like by air flow even if the infant had crowded drink Unfortunately it is possible to prevent.
[Brief description of the drawings]
FIG. 1 is a longitudinal half sectional view of a mechanical pencil showing a first embodiment of the present invention.
FIG. 2 is a longitudinal half sectional view of a mouthpiece according to a first embodiment.
FIG. 3 is a view as seen from the front end side of FIG. 2;
4 is a cross-sectional view taken along arrow AA in FIG. 2;
FIG. 5 is a longitudinal half sectional view of a mouthpiece according to a second embodiment.
6 is a view seen from the front end side of FIG. 5. FIG.
7 is a cross-sectional view taken along line BB in FIG.
FIG. 8 is a longitudinal half sectional view of a mouthpiece according to a third embodiment.
9 is a view as seen from the front end side of FIG. 8. FIG.
10 is a cross-sectional view taken along the line CC in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Shaft part 3 Core case 4 Tip tool 4a Inner hole 5 Rib 6 Vent hole 7 Holding chuck 8 Tip pipe 9 Joint 10 Chuck 11 Spring 12 Eraser base 13 Knock cover 14 Vent hole 15 Eraser 20 Tip tool 20a Inner hole 21 Rib 22 Vent hole 23 Insertion hole 24 Holding chuck 25 Cylindrical part 30 Tip tool 30a Inner hole 31 Rib 32 Vent hole 33 Insertion hole 34 Holding chuck

Claims (4)

In the separable resin tip attached to the tip of the writing tool barrel , a plurality of ribs are formed in a circumferential shape at a required location on the inner hole tip separately from the hole protruding from the writing tip. A ventilation hole communicating the inner hole from the vicinity of the tip to the rear end attached to the shaft cylinder is provided between the rib and the rib, and a holding chuck made of an elastic body such as rubber is attached to the rear center portion of the rib. Mouthpiece for writing instruments used for mechanical pencils . The tip of a writing instrument according to claim 1, wherein a tip pipe is fixed to the center of the tip of the rib. The tip of a writing instrument according to claim 1, wherein a cylindrical part having a core insertion hole is formed at the center of the tip of the rib. The tip of a writing instrument according to claim 1, wherein the tip of the rib has a core insertion hole at the center of the tip.

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