JP2021084251A - Retractable writing utensil - Google Patents

Abstract

To prevent deviation of an elastic covering part.SOLUTION: A retractable writing utensil includes: a shaft cylinder 10; a front port 20 having a tapered inclined inner surface 21 and connected to a front end side of the shaft cylinder 10; and refills 41 and 42 stored in the shaft cylinder 10 and projecting and retracting from the front port 20. In the retractable writing utensil, an elastic covering part 50 covering the inclined inner surface 21 is provided at the front port 20, and a receiving part 11b receiving the elastic covering part 50 from a rear side is provided at a front end side of the shaft cylinder 10.SELECTED DRAWING: Figure 1

Description

The present invention relates to a haunting type writing tool in which a refill is haunted from the tip.

Conventionally, as described in Patent Document 1, for example, this type of writing instrument is provided with one or more refills in the barrel, and the writing tip of the refill can appear and disappear from the tip attached to the front end of the barrel. Some of the infestation type writing utensils provided with a resin coating that covers the inner peripheral surface of the front opening.
According to this haunting writing tool, when the refill appears and disappears from the tip, the impact when the writing tip of the refill interferes with the inner peripheral surface of the tip may damage the writing tip or make an unpleasant sound. It can be prevented from occurring.

Japanese Unexamined Patent Publication No. 2008-126595

However, according to the above-mentioned prior art, the resin coating may be displaced from the front opening due to a drop impact or the like, and the above-mentioned impact mitigation action may not be sufficiently obtained.

The present invention has the following configurations in order to solve at least a part of the above problems.
A retractable writing tool having a barrel, a tapered inner surface, a tip connected to the front end side of the barrel, and a refill stored in the barrel and appearing from the tip. The front opening is provided with an elastic coating portion that covers the inclined inner surface, and the front end side of the barrel is provided with a receiving portion that receives the elastic coating portion from the rear side. Stationery.

Since the present invention is configured as described above, it is possible to prevent the elastic coating portion from being displaced, and by extension, a sufficient impact mitigation effect can be obtained.

It is a side view which shows an example of the haunting type writing instrument which concerns on this invention, and shows the main part notched. It is a semi-cross-sectional view which shows the disassembled state of a front mouth, an elastic covering part, and a front shaft. The connection portion between the front shaft and the tip opening is shown, and it is a cut end view along the center line. The connection portion between the front shaft and the tip opening in another example of the infestation type writing instrument according to the present invention is shown, and it is a cut end view along the center line. The connection portion between the front shaft and the tip opening in another example of the infestation type writing instrument according to the present invention is shown, and it is a cut end view along the center line. The connection portion between the front shaft and the tip opening in another example of the infestation type writing instrument according to the present invention is shown, and it is a cut end view along the center line. The connection portion between the front shaft and the tip opening in another example of the infestation type writing instrument according to the present invention is shown, and it is a cut end view along the center line. The connection portion between the front shaft and the tip opening in another example of the infestation type writing instrument according to the present invention is shown, and it is a cut end view along the center line.

In this embodiment, the following features are disclosed.
The first feature is that it has a barrel, a tip that has a tapered inner surface and is connected to the front end side of the barrel, and a refill that is housed in the barrel and appears and disappears from the tip. A retractable writing tool, the front opening of which is provided with an elastic covering portion that covers the inclined inner surface, and the front end side of the barrel is provided with a receiving portion that receives the elastic coating portion from the rear side. (See FIGS. 1 to 7).

The second feature is that the receiving portion is used as the first receiving portion, and the front opening is provided with a second receiving portion that receives the elastic covering portion from the front side on the front end side of the inclined inner surface (the second receiving portion). (See FIG. 4).

As a third feature, a protrusion is provided on the front end side of the elastic coating portion so as to project radially inward from the inner surface of the front end opening of the front opening (see FIG. 5).

As a fourth feature, a front end side covering portion that covers the inner surface of the front end opening of the front opening is provided on the front end side of the elastic covering portion (see FIG. 6).

<First embodiment>
Next, a specific embodiment having the above characteristics will be described in detail with reference to the drawings. In the present specification, the axial direction means the direction in which the center line of the shaft cylinder 10 extends. Further, the “front” means one side in the axial direction and the forward direction of the refills 41 and 42. Further, "rear" means the side in the opposite direction to the one side.

The retractable writing tool 1 shown in FIGS. 1 to 3 includes a shaft cylinder 10, a front opening 20 connected to the front end side of the shaft cylinder 10, an elastic covering portion 50 in the front opening 20, and a rear side of the front opening 20. A tubular grip portion 30 integrally provided on the shaft cylinder 10, a plurality of refills 41 and 42 housed in the shaft cylinder 10 and appearing and disappearing from the front opening 20, and a refill (not shown) on the rear side inside the shaft cylinder 10. It is equipped with an advance / retreat mechanism.

The axle cylinder 10 includes a tubular front shaft 11, an intermediate shaft 12 detachably connected to the rear end side of the front shaft 11, and a hauling operation shaft 13 connected to the rear end side of the intermediate shaft 12. It is equipped.

The front shaft 11 is formed of a hard synthetic resin material into a long cylindrical shape, and has a male screw portion 11a having an outer diameter smaller than that of the grip portion 30 on an outer peripheral portion located on the front side of the grip portion 30.

The front shaft 11 is provided with a receiving portion 11b (first receiving portion) that receives the elastic covering portion 50 described later from the rear side. The receiving portion 11b is a front end portion of the cylindrical front shaft 11.

The receiving portion 11b may be brought into contact with the elastic covering portion 50 from the rear side. As another example of the receiving portion 11b, a step portion or the like provided on the inner peripheral surface of the front shaft 11 can be used.

The intermediate shaft 12 is formed in a cylindrical shape by a hard synthetic resin material or the like, and is screwed and connected to the rear end side of the front shaft 11. This connecting portion is removed when the refills 41 and 42 are replaced.

The haunting operation shaft 13 is formed in a cylindrical shape by a hard synthetic resin material or the like, and is rotatably and irreversibly connected to the rear end side of the intermediate shaft 12.
Inside the haunting operation shaft 13, a refill advancing / retreating mechanism (not shown) that selectively haunts the refills 41 and 42 by rotating the haunting operation shaft 13 is provided.
As the refill advance / retreat mechanism, a mechanism other than the illustrated example can be used, such as a mechanism for selectively appearing and retreating the refills 41 and 42 by an operation of advancing / retreating the slide piece.

The tip 20 has a tapered conical inclined inner surface 21 and a cylindrical connecting portion 22 on the rear side of the inclined inner surface 21, and the male of the front shaft 11 is provided on the inner peripheral surface of the connecting portion 22. It has a female screw portion 22a to be screwed into the screw portion 11a.
According to an example of the present embodiment, the tip 20 is formed of a hard metal material, but it can also be formed of a material other than metal.
The front end 20 is screwed into the male screw portion 11a on the front end side of the front shaft 11 so that the rear end is in contact with the front end of the grip portion 30.

The outer diameter of the connecting portion 22 of the front opening 20 is set to be substantially the same as the outer diameter of the grip portion 30. In other words, the outer peripheral surface of the connecting portion 22 is connected substantially flush with the outer peripheral surface of the grip portion 30.
As another example, it is also possible to make the outer peripheral surface of the grip portion 30 wider than the outer diameter of the connecting portion 22.

The elastic coating portion 50 is formed of an elastic material such as an elastomer resin or synthetic rubber in a substantially conical shape along the inclined inner surface 21, and is mounted in the front opening 20 so as to cover the inclined inner surface 21 (see FIG. 2).

According to an example shown in FIG. 3, the inner surface 51 of the front end portion of the elastic covering portion 50 is formed substantially flush with the inner surface 23 of the front end opening of the front opening 20 (see FIG. 3). That is, the inner diameter d1 of the front end portion of the elastic covering portion 50 and the inner diameter d0 of the front end opening portion of the front opening 20 are substantially the same diameter.
Further, a tubular portion 52 is provided at the rear end of the elastic covering portion 50 along the inner peripheral surface of the connecting portion 22 of the front opening 20, and the rear end portion of the tubular portion 52 is a receiver on the front end side of the front shaft 11. Received by part 11b.

According to these configurations, the elastic covering portion 50 contacts the tapered conical outer peripheral surface with the inclined inner surface 21 of the front opening 20, and at the rear end side, the rear end of the tubular portion 52 is the front end of the front shaft 11. By contacting the receiving portion 11b, it is fixed so as not to move in the front-rear direction and the radial direction.

Further, the grip portion 30 is formed in a cylindrical shape from an elastic synthetic resin material such as an elastomer resin. The grip portion 30 is integrally provided on the outer peripheral surface of the front shaft 11 on the rear side of the male screw portion 11a by, for example, two-color molding.

Further, among the plurality of refills, the refill indicated by reference numeral 41 is a refill for a ballpoint pen, and the refill indicated by reference numeral 42 is a refill for a mechanical pencil.
The rear ends of these refills 41 and 42 are detachably connected to a refill advance / retreat mechanism (not shown) in the haunting operation shaft 13.

Next, the characteristic action and effect of the haunting type writing tool 1 having the above configuration will be described in detail.
According to the above configuration, the front end 20 having a different texture can be attached to the front end side of the barrel 10 having the grip portion 30 integrally, which is excellent in design and the front opening 20 can be easily removed. Can be prevented.
Moreover, when the front opening 20 is screwed into the male screw portion 11a on the front end side of the front shaft 11, the elastic covering portion 50 comes into contact with both the inclined inner surface 21 of the front opening 20 and the receiving portion 11b of the front shaft 11, and this state is established. Since it is held, it is possible to prevent the elastic coating portion 50 from shifting in the front-rear direction and the radial direction due to a drop impact or the like, and the elastic coating portion 50 in contact with the front end of the front shaft 11 causes the tip. It is possible to prevent the mouth 20 from loosening.
Then, when the refills 41 and 42 are advanced and retreated and appear and disappear from the front end of the front opening 20, the elastic covering portion 50 prevents the writing portion on the front end side of the refills 41 and 42 from directly contacting the front opening 20. As a result, it is possible to reduce impact noise and vibration due to the contact, damage to the writing tip, and the like.

<Second embodiment>
Next, another embodiment according to the present invention will be described.
In addition, since the embodiment shown below is a modification of the haunting type writing tool 1 in part, the modified portion will be mainly described in detail, and duplicate detailed description will be omitted.

As shown in FIG. 4, the infestation type writing tool of the second embodiment replaces the front opening 20 with the front opening 20'and the elastic coating portion 50 with the elastic coating portion 50'with respect to the above-mentioned infestation type writing tool 1. It was done.

The front opening 20'has a receiving portion 24 (second receiving portion) that receives the elastic covering portion 50'from the front side on the front end side of the inclined inner surface 21.
The receiving portion 24 has a stepped shape over the entire circumference of the front opening 20'by expanding the diameter of the front end side of the inclined inner surface 21 of the front opening 20'and the portion rearward of the inner surface 23 of the front end opening. Provided.

A flat contact surface 53 in contact with the receiving portion 24 from the rear side is formed on the elastic covering portion 50'over the entire circumference.
The inner diameter d1 of the front end portion of the elastic covering portion 50'and the inner diameter d0 of the front end opening portion of the front opening 20'are substantially the same diameter.

Therefore, according to the second embodiment shown in FIG. 4, the same action and effect as that of the infestation type writing tool 1 can be obtained, and in particular, the elastic covering portion 50'is displaced forward with respect to the front opening 20'. Can be effectively prevented by the contact between the receiving portion 24 on the front opening 20'side and the contact surface 53 on the elastic covering portion 50'side.

<Third embodiment>
As shown in FIG. 5, the infestation type writing tool of the third embodiment is obtained by replacing the elastic coating portion 50 with the elastic coating portion 50 "with respect to the above infestation type writing tool 1.

The elastic coating portion 50 "has a smaller inner diameter d1 of the tip portion than the inner diameter d0 of the front end opening of the front opening 20. That is, the front end side of the elastic coating portion 50" has the front end of the front opening 20. A protruding portion 55 is provided that projects radially inward from the inner surface 23 of the opening.

Therefore, according to the third embodiment shown in FIG. 5, in addition to obtaining the same effect as that of the infestation type writing tool 1, the refills 41 and 42 are formed on the inner surface 23 of the tip opening of the front opening 20. The protrusion 55 can effectively reduce the occurrence of impact noise, vibration, etc. due to direct contact.

<Fourth Embodiment>
The infestation type writing tool of the fourth embodiment is obtained by replacing the elastic coating portion 50 with the elastic coating portion 50 "'" with respect to the above-mentioned infestation type writing tool 1 (see FIG. 6).

The elastic covering portion 50 ″ has a front end side covering portion 54 that covers the inner surface 23 of the front end opening of the front opening 20 on the front end side thereof.

The front end side covering portion 54 has an inner diameter d1 smaller than the inner diameter d0 of the front end opening of the front opening 20, and is extended forward to form an annular shape covering the inner surface 23 of the front end opening of the front opening 20. Will be done.

Therefore, according to the fourth embodiment shown in FIG. 6, in addition to obtaining the same effect as that of the infestation type writing tool 1, the refills 41 and 42 are formed on the inner surface 23 of the tip opening of the front opening 20. It is possible to more effectively reduce the occurrence of impact noise, vibration, etc. due to direct contact.
Further, when writing is performed by projecting the writing portions of the refills 41 and 42 from the front end of the front opening 20, the outer peripheral surface of the writing portion is firmly received by the inner peripheral surface of the elastic covering portion 50 "'. And, by extension, the writing feel of the infestation type writing tool 1 can be improved.

<Fifth Embodiment>
As shown in FIG. 7, the infestation type writing tool of the fifth embodiment is elastic by replacing the front shaft 11 with the front shaft 11'and the front opening 20 with the front opening 20x with respect to the above-mentioned infestation type writing tool 1. By replacing the covering portion 50 with the elastic covering portion 50x, the unevenness relationship between the tip opening and the connecting portion of the shaft cylinder is reversed (see FIG. 7).

The front shaft 11'is provided with a female screw portion 11c1 on the inner peripheral side instead of omitting the male screw portion 11a on the front shaft 11.
More specifically, the inner peripheral surface on the front end side of the front shaft 11'is provided with an enlarged inner peripheral surface 11c whose diameter is increased on the front side with the receiving portion 11d as a boundary, and the enlarged inner peripheral surface 11c is provided. The female screw portion 11c1 is formed on the surface.

The receiving portion 11d is provided in a stepped shape over the entire circumference on the rear end side of the enlarged inner peripheral surface 11c, and receives the rear end portion of the elastic covering portion 50x.

The front opening 20x omits the female screw portion 22a on the front opening 20 and instead provides a male screw portion 22b on the outer peripheral side.
More specifically, a cylindrical connecting portion 22'with a reduced diameter is provided on the rear end side of the front opening 20x, and a male screw portion 22b is formed on the outer peripheral surface of the connecting portion 22'.

Further, the elastic coating portion 50x is configured to replace the tubular portion 52 in the elastic coating portion 50 with a long cylindrical tubular portion 52'.

The tubular portion 52'extends rearward along the inner peripheral surface of the connecting portion 22'of the front opening 20x, and the rear end portion is projected rearward from the rear end of the connecting portion 22'of the front opening 20x. , It is in contact with the step portion 11d on the front shaft 11'side.

Therefore, according to the fifth embodiment shown in FIG. 7, the effect of preventing the elastic coating portion 50x from slipping, the effect of preventing the front opening 20x from loosening, the effect of preventing the refills 41 and 42 from directly contacting the front opening 20x, and the like. , The same effect as that of the haunting writing tool 1 can be obtained.

<Sixth Embodiment>
As shown in FIG. 8, the infestation type writing instrument of the sixth embodiment is obtained by replacing the elastic coating portion 50x of the infestation type writing instrument shown in FIG. 7 with the elastic coating portion 50x'.

The elastic coating portion 50x'is provided with a diameter-expanded portion 52a'on the rear end side of the tubular portion 52' so as to project in the out-of-diameter direction. The enlarged diameter portion 52a'is sandwiched between the rear end of the front opening 20x and the receiving portion 11d.

Therefore, according to the sixth embodiment shown in FIG. 8, in particular, the effect of preventing the elastic coating portion 50x'from slipping, the effect of preventing the tip 20x from loosening, and the like can be effectively obtained.

The haunting type writing tool of the present embodiment constitutes a multifunctional haunting writing tool having a plurality of types of refills 41 and 42 as a particularly effective example, but as another example, a single refill. It is also possible to construct a haunting type writing tool that haunts.

Further, according to the above embodiment, the elastic coating portion is fixed to the inner peripheral surface of the front opening by fitting it, but as another example, the elastic coating portion is fixed to the inner peripheral surface of the front opening by two-color molding. It is also possible to do.

Further, the present invention is not limited to the above-described embodiment, and can be appropriately changed without changing the gist of the present invention.

1: Haunting type writing tool 10: Shaft cylinder 11, 11': Front shaft 11b: Receiving part (first receiving part)
21: Inclined inner surface 20, 20', 20x: Tip 24: Receiving part (second receiving part)
41, 42: Refill 50, 50', 50 ", 50"', 50x, 50x': Elastic coating 54: Front end side coating 55: Projection

Claims (4)

A retractable writing tool having a barrel, a tapered inner surface, a tip connected to the front end side of the barrel, and a refill stored in the barrel and appearing from the tip. ,
The tip is provided with an elastic coating that covers the inclined inner surface.
A haunting type writing tool characterized in that a receiving portion for receiving the elastic covering portion from the rear side is provided on the front end side of the barrel. The receiving part is used as the first receiving part.
The haunting writing tool according to claim 1, wherein the front opening is provided with a second receiving portion that receives the elastic covering portion from the front side on the front end side of the inclined inner surface. The infestation type writing tool according to claim 1, wherein a protruding portion that protrudes radially inward from the inner surface of the front end opening of the front opening is provided on the front end side of the elastic coating portion. The haunting type writing tool according to any one of claims 1 to 3, wherein a front end side covering portion that covers the inner surface of the front end opening of the front opening is provided on the front end side of the elastic covering portion.

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