CA2061438A1 - Cap of writing instrument and the like - Google Patents
Cap of writing instrument and the likeInfo
- Publication number
- CA2061438A1 CA2061438A1 CA002061438A CA2061438A CA2061438A1 CA 2061438 A1 CA2061438 A1 CA 2061438A1 CA 002061438 A CA002061438 A CA 002061438A CA 2061438 A CA2061438 A CA 2061438A CA 2061438 A1 CA2061438 A1 CA 2061438A1
- Authority
- CA
- Canada
- Prior art keywords
- cap
- rear end
- writing
- ribs
- inner cap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Landscapes
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
ABSTRACT
An improved cap of writing instruments comprises an inner cap 18 inserted therein in axially movable manner. The inner cap has a bottomed sealing member 23 made of an elastomer closely inserted therein and an opening 8 formed at rear end thereof. Plural ribs 13 are formed on the inside of a rear end portion of the cap, while other plural ribs 19 are formed on the outside of an front end portion of the inner cap so that there may be formed a gaps 17, 22 between the cap and the inner cap to provide an air passage through the interior of the cap.
There are formed first and second annular engaging protrusions 11, 12 on the inner surface of the cap, one for stopping the inner cap and the other for engaging with an annular engaging protrusion 4 provided on the front end of a writing shaft 3.
An improved cap of writing instruments comprises an inner cap 18 inserted therein in axially movable manner. The inner cap has a bottomed sealing member 23 made of an elastomer closely inserted therein and an opening 8 formed at rear end thereof. Plural ribs 13 are formed on the inside of a rear end portion of the cap, while other plural ribs 19 are formed on the outside of an front end portion of the inner cap so that there may be formed a gaps 17, 22 between the cap and the inner cap to provide an air passage through the interior of the cap.
There are formed first and second annular engaging protrusions 11, 12 on the inner surface of the cap, one for stopping the inner cap and the other for engaging with an annular engaging protrusion 4 provided on the front end of a writing shaft 3.
Description
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CAP OF WRITING INSTRUMENT AND THE LIKE
BACKGROUND OF THE INVENTION
Field of the invention The present invention relates to an improved cap put on the front end of writing instruments such as a sign pen, marker, aqueous ball pen and the like to prevent evaporation of the ink contained therein.
Prior Art Conventional caps used for a sign pen, marker and the like are formed of resin materials excellent in ink evaporation suppressibility, an~ are put on the front end of the writing instrument, with the front end tightly inserted in an inner hole of the cap or an inner cap provided on the inner hole.
With the conventional caps used for the sign pen, marker and the like, it is possible such accident to occur although very rarely depending upon the size and shape thereof that, since the inner hole is in a blocked condition except for the inserting side, any little child swallows the cap by mistake which in turn clogs the throat thereby resulting in asphyxiation.
SUMMARY OF THE INVENTION
An object of the present invention is to avoid the risks of asphyxiation and the like in such circumference as above by making the ventilation possible even if any little child swallows the cap by mistake which in turn clogs the throat and to prevent the hand or clothing of the user from being stained by ink which spouts out from the writing tip and an air hole provided about the writing tip (so-called pumping .
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CAP OF WRITING INSTRUMENT AND THE LIKE
BACKGROUND OF THE INVENTION
Field of the invention The present invention relates to an improved cap put on the front end of writing instruments such as a sign pen, marker, aqueous ball pen and the like to prevent evaporation of the ink contained therein.
Prior Art Conventional caps used for a sign pen, marker and the like are formed of resin materials excellent in ink evaporation suppressibility, an~ are put on the front end of the writing instrument, with the front end tightly inserted in an inner hole of the cap or an inner cap provided on the inner hole.
With the conventional caps used for the sign pen, marker and the like, it is possible such accident to occur although very rarely depending upon the size and shape thereof that, since the inner hole is in a blocked condition except for the inserting side, any little child swallows the cap by mistake which in turn clogs the throat thereby resulting in asphyxiation.
SUMMARY OF THE INVENTION
An object of the present invention is to avoid the risks of asphyxiation and the like in such circumference as above by making the ventilation possible even if any little child swallows the cap by mistake which in turn clogs the throat and to prevent the hand or clothing of the user from being stained by ink which spouts out from the writing tip and an air hole provided about the writing tip (so-called pumping .
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phenomenon), with the inner pressure within the cap reduced or elevated when the cap is taken out or put thereon. The cap for writing instruments according to the present invention contrived in order to achieve the above object comprises an inner cap with a sealing member made of an elastomer inserted therein, a spring loaded to energize the inner cap to be axially movable, plural ribs formed on one portion of the cap and on other portion of the inner cap respectively to provide suitable gaps therebetween, and a hole formed on the rear end of the cap, said gaps and the rear end hole providing an air passage communicating the inner hole of the cap with open air.
When a writing body is inserted in the cap, the front end of the writing body is closely inserted in the sealing member with the inner cap axially moved and thus there can be prevented the getting dry of the writing tip and the evaporation of ink.
With the inner cap axially moved following the putting on or taking out of the cap, any pressurization and depressurization within the cap and sealing member can be prevented and thus there can be prevented the hand or clothing of the user from being stained by ink otherwise spouts out.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of a writing instrument to which an embodiment of the present invention is applied;
Fig. 2 is a perspective view showing a condition where a cap is taken out of a writing body;
Fig. 3 is a perspective view showing the writing body and the cap exploded and shown partly in vertical section;
Fig. 4 shows a half sectional view of the cap in a .
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' condition where the writing body is completely inserted thereinto;
Fig. 5 is a cross-section taken along line V - V in Fig. 4;
Fig. 6 is a cross-section taken along line VI VI in Fig. 4; and Fig. 7 is a half cross-sectional view of the cap portion in a condition directly before the writing body is inserted thereinto.
DETAILED DESCRIPTION
Referring now to the accompanying drawings showing an embodiment, the present invention will be described futher in detail. The present invention is designed, in a cap of a sign pen, marker, aqueous ball pen, etc., put on the writing front tip thereof to prevent evaporation of ink therefrom, such that, even if accidentally swallowed in by a little child, it does not asphyxiate the child thanks to an air passage provided .
therein and fllrther that ink does not spout out from the writing tip or an air hole thereabout under pressurization or depressurization in the case of the insertion or removal of the writing body in or from the cap to stain the hand or clothing of a user. As shown in Figs. 3 - 7, plural ribs 13 are provided at suitable places on the rear end side wall of an inner hole 10 of a cap 6. Through the rear end wall with a rear surface 15 of the cap 6, an opening 8 is formed leaving a stepped portion 14. On the inner face of the cap 6 are formed first and second annular engaging protrusions 11, 12. There is housed in the cap a bottomed tubular inner cap 18 whose rear ~: :
phenomenon), with the inner pressure within the cap reduced or elevated when the cap is taken out or put thereon. The cap for writing instruments according to the present invention contrived in order to achieve the above object comprises an inner cap with a sealing member made of an elastomer inserted therein, a spring loaded to energize the inner cap to be axially movable, plural ribs formed on one portion of the cap and on other portion of the inner cap respectively to provide suitable gaps therebetween, and a hole formed on the rear end of the cap, said gaps and the rear end hole providing an air passage communicating the inner hole of the cap with open air.
When a writing body is inserted in the cap, the front end of the writing body is closely inserted in the sealing member with the inner cap axially moved and thus there can be prevented the getting dry of the writing tip and the evaporation of ink.
With the inner cap axially moved following the putting on or taking out of the cap, any pressurization and depressurization within the cap and sealing member can be prevented and thus there can be prevented the hand or clothing of the user from being stained by ink otherwise spouts out.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of a writing instrument to which an embodiment of the present invention is applied;
Fig. 2 is a perspective view showing a condition where a cap is taken out of a writing body;
Fig. 3 is a perspective view showing the writing body and the cap exploded and shown partly in vertical section;
Fig. 4 shows a half sectional view of the cap in a .
.
' condition where the writing body is completely inserted thereinto;
Fig. 5 is a cross-section taken along line V - V in Fig. 4;
Fig. 6 is a cross-section taken along line VI VI in Fig. 4; and Fig. 7 is a half cross-sectional view of the cap portion in a condition directly before the writing body is inserted thereinto.
DETAILED DESCRIPTION
Referring now to the accompanying drawings showing an embodiment, the present invention will be described futher in detail. The present invention is designed, in a cap of a sign pen, marker, aqueous ball pen, etc., put on the writing front tip thereof to prevent evaporation of ink therefrom, such that, even if accidentally swallowed in by a little child, it does not asphyxiate the child thanks to an air passage provided .
therein and fllrther that ink does not spout out from the writing tip or an air hole thereabout under pressurization or depressurization in the case of the insertion or removal of the writing body in or from the cap to stain the hand or clothing of a user. As shown in Figs. 3 - 7, plural ribs 13 are provided at suitable places on the rear end side wall of an inner hole 10 of a cap 6. Through the rear end wall with a rear surface 15 of the cap 6, an opening 8 is formed leaving a stepped portion 14. On the inner face of the cap 6 are formed first and second annular engaging protrusions 11, 12. There is housed in the cap a bottomed tubular inner cap 18 whose rear ~: :
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end is closed to form a ceiling portion 21~ The inner cap 18 has a front end hole in which a bottomed sealing member 23 airtightly formed of an elastomer is inserted and a plurality of ribs 19 are formed at suitable places on the front end outer periphery thereof. The inner cap 18 is inserted in the inner hole 10 of the above cap with a compression spring 24 energing between the front end step portions 16 of the above ribs and the rear end step portions 20 of the ribs 19 so that the front end of the inner cap 18 may be elastically engaged with the engaging portion 12 provided on the inner hole 10 of the cap to prevent the writing body 2 from moving toward the inserting side while allowing the inner cap 18 to move rearward relative to the cap 8. There are formed plural gaps 17 and 22 respectively between the outer periphery of the inner cap 18 and the ribs 13 of the inner hole 10 and between the inner hole 10 and the ribs 18 of the inner cap 18 to provide an air passage between the rear end opening 8 of the cap and the inner hole 10 for communicating with the open air.
While, at front portion on a shaft 3 of the writing body 2 is formed an annular engaging protrusion 4 and on the front end of the shaft 3 is provided a writing tip 5 of an aqueous ball pen or the like. In the writing body 2 is contained a liquid ink, while, between the interior therof an~
the writing tip is provided a control device (not shown) for properly adjusting the outflow of ink and for reserving ink depending on change of the inner pressure in the ink reservoir.
Location of the annular engaging protrusion 11 of the cap is such arranged that, when it catches the annular engaging
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end is closed to form a ceiling portion 21~ The inner cap 18 has a front end hole in which a bottomed sealing member 23 airtightly formed of an elastomer is inserted and a plurality of ribs 19 are formed at suitable places on the front end outer periphery thereof. The inner cap 18 is inserted in the inner hole 10 of the above cap with a compression spring 24 energing between the front end step portions 16 of the above ribs and the rear end step portions 20 of the ribs 19 so that the front end of the inner cap 18 may be elastically engaged with the engaging portion 12 provided on the inner hole 10 of the cap to prevent the writing body 2 from moving toward the inserting side while allowing the inner cap 18 to move rearward relative to the cap 8. There are formed plural gaps 17 and 22 respectively between the outer periphery of the inner cap 18 and the ribs 13 of the inner hole 10 and between the inner hole 10 and the ribs 18 of the inner cap 18 to provide an air passage between the rear end opening 8 of the cap and the inner hole 10 for communicating with the open air.
While, at front portion on a shaft 3 of the writing body 2 is formed an annular engaging protrusion 4 and on the front end of the shaft 3 is provided a writing tip 5 of an aqueous ball pen or the like. In the writing body 2 is contained a liquid ink, while, between the interior therof an~
the writing tip is provided a control device (not shown) for properly adjusting the outflow of ink and for reserving ink depending on change of the inner pressure in the ink reservoir.
Location of the annular engaging protrusion 11 of the cap is such arranged that, when it catches the annular engaging
- 4 -.
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3~3 protrusion 4 of the shaft 3 with the writing body 2 inserted into the inner hole 10 of the cap, the inner cap 18 retreats by a distance S as shown in Fig. 4 with the front portion of the shaft 3 pressing the rear end wall of the sealing member 23 and at that time the ceiling 21 of the inner cap 18 virtually evens with the rear end outer surface of the cap.
(Function) The present invention is designed as above and, in a condition where the writing body 2 is fully inserted in the cap as shown in Fig 4, the front poriton of the writing body is closely inserted in the sealing member 23 with the writing tip
' , . :
3~3 protrusion 4 of the shaft 3 with the writing body 2 inserted into the inner hole 10 of the cap, the inner cap 18 retreats by a distance S as shown in Fig. 4 with the front portion of the shaft 3 pressing the rear end wall of the sealing member 23 and at that time the ceiling 21 of the inner cap 18 virtually evens with the rear end outer surface of the cap.
(Function) The present invention is designed as above and, in a condition where the writing body 2 is fully inserted in the cap as shown in Fig 4, the front poriton of the writing body is closely inserted in the sealing member 23 with the writing tip
5 pressed onto the rear end wall of the sealing member 23.
Accordingly, there can be prevented both the getting dry of the writing tip and the evaporation of ink from the air hole provided thereabout. Futher, since the insertion is carried out with the inner cap 18 simultaneously retreating, the interiors of the cap and the sealing member are not pressuriged. While, when the writing body 2 is removed from the cap 6, the inner cap 18 is returned inward by the returning force of the spring 34 while following the writing body 2, and thus there does not take place any depressurization.
Accordingly, no ink spouts out from the writing tip and the air hole. Further, since an air passage is formed which communicates the inner hole 10 with the opening 8 in the condition where the writing body 2 is removed from the cap 6, there can be prevented accidents such as asphyxiation and the like even if the cap is swallowed by mistake to clog the throat.
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(Effect of the invention) Since the construciton and the function of the present invention is described above, even i~ any little child swallows the cap by mistake to clog the throat, there can be avoided accidents such as aasphyxiation and the like, with open air allowed to pass the interior of the cap which has an air passage provided between the rear end opening and the cap's inner hole. Further, the above construction provides no inferiority in apprearence. Moreover, since there is not caused any pressurization or depressurization in the interior of the cap and the front portion of the writing body, there can be prevented such problem that ink sports out from the writing tip or the air hole to stain the hand and the clothing of the user.
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Accordingly, there can be prevented both the getting dry of the writing tip and the evaporation of ink from the air hole provided thereabout. Futher, since the insertion is carried out with the inner cap 18 simultaneously retreating, the interiors of the cap and the sealing member are not pressuriged. While, when the writing body 2 is removed from the cap 6, the inner cap 18 is returned inward by the returning force of the spring 34 while following the writing body 2, and thus there does not take place any depressurization.
Accordingly, no ink spouts out from the writing tip and the air hole. Further, since an air passage is formed which communicates the inner hole 10 with the opening 8 in the condition where the writing body 2 is removed from the cap 6, there can be prevented accidents such as asphyxiation and the like even if the cap is swallowed by mistake to clog the throat.
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(Effect of the invention) Since the construciton and the function of the present invention is described above, even i~ any little child swallows the cap by mistake to clog the throat, there can be avoided accidents such as aasphyxiation and the like, with open air allowed to pass the interior of the cap which has an air passage provided between the rear end opening and the cap's inner hole. Further, the above construction provides no inferiority in apprearence. Moreover, since there is not caused any pressurization or depressurization in the interior of the cap and the front portion of the writing body, there can be prevented such problem that ink sports out from the writing tip or the air hole to stain the hand and the clothing of the user.
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Claims
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
In a cap of a sign pen, marker, aqueous ball pen or the like to be put on the writing front end portion for preventing ink from vaporizing, the improvement which comprises:
plural ribs (13) formed at suitable places on rear end side of an inner hole (10) of a cap (6);
an opening (8) formed on the rear end of the cap;
first and second annular engaging protrusions (11) and (12) formed in side on a front end portion and a middle portion;
a bottomed tubular inner cap (18) rear end closed with a ceiling 21, in the front side of which is closely inserted a bottomed tubular sealing member (23) airtightly formed of an elastomer and on front side outer periphery of which are formed ribs (19) at suitable places, said inner cap being movably inserted in the inner hole (10);
a spring (24) loaded between the front end step portion (16) of the ribs (13) and the rear end step portion (20) of the ribs (19) so as to energize the front end of the inner cap (18) to elastically engage with the engaging protrusion (12) while preventing it from further moving toward the inserting side of the writing body;
an air passage formed to communicate the inner hole (10) from the front end of the inner cap (18) with open air;
the engaging protrusion (11) being such arranged that, when the writing body (2) is inserted in the inner hole (10) with an engaging portion (4) provided on a shaft (3) caught by the engaging protrusion (11) of the cap, the front portion of the shaft (3) is closely inserted in the sealing member (23) and the inner cap (18) retreats while the front end of the writing tip (5) compressing the rear end wall of the sealing member (23) so that the ceiling portion (21) nearly evens with the rear end outer surface (15) of the cap.
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
In a cap of a sign pen, marker, aqueous ball pen or the like to be put on the writing front end portion for preventing ink from vaporizing, the improvement which comprises:
plural ribs (13) formed at suitable places on rear end side of an inner hole (10) of a cap (6);
an opening (8) formed on the rear end of the cap;
first and second annular engaging protrusions (11) and (12) formed in side on a front end portion and a middle portion;
a bottomed tubular inner cap (18) rear end closed with a ceiling 21, in the front side of which is closely inserted a bottomed tubular sealing member (23) airtightly formed of an elastomer and on front side outer periphery of which are formed ribs (19) at suitable places, said inner cap being movably inserted in the inner hole (10);
a spring (24) loaded between the front end step portion (16) of the ribs (13) and the rear end step portion (20) of the ribs (19) so as to energize the front end of the inner cap (18) to elastically engage with the engaging protrusion (12) while preventing it from further moving toward the inserting side of the writing body;
an air passage formed to communicate the inner hole (10) from the front end of the inner cap (18) with open air;
the engaging protrusion (11) being such arranged that, when the writing body (2) is inserted in the inner hole (10) with an engaging portion (4) provided on a shaft (3) caught by the engaging protrusion (11) of the cap, the front portion of the shaft (3) is closely inserted in the sealing member (23) and the inner cap (18) retreats while the front end of the writing tip (5) compressing the rear end wall of the sealing member (23) so that the ceiling portion (21) nearly evens with the rear end outer surface (15) of the cap.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002061438A CA2061438A1 (en) | 1990-11-07 | 1992-02-18 | Cap of writing instrument and the like |
| FR9201990A FR2687610B1 (en) | 1990-11-07 | 1992-02-21 | CAP FOR WRITING INSTRUMENT OR THE LIKE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11626290U JPH0473589U (en) | 1990-11-07 | 1990-11-07 | |
| CA002061438A CA2061438A1 (en) | 1990-11-07 | 1992-02-18 | Cap of writing instrument and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2061438A1 true CA2061438A1 (en) | 1993-08-19 |
Family
ID=25674975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002061438A Abandoned CA2061438A1 (en) | 1990-11-07 | 1992-02-18 | Cap of writing instrument and the like |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2061438A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5599127A (en) * | 1991-11-13 | 1997-02-04 | Bic Corporation | Cap for writing and marking instruments |
-
1992
- 1992-02-18 CA CA002061438A patent/CA2061438A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5599127A (en) * | 1991-11-13 | 1997-02-04 | Bic Corporation | Cap for writing and marking instruments |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |