JP3928994B2 - Applicator cap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an applicator cap, and more particularly to a cap attached to the tip of a ballpoint pen, felt pen, line marker, glue, nail polish, or the like.
[0002]
[Prior art]
Conventionally, caps such as ballpoint pens and felt pens are detachably attached to the tip of the applicator body for the purpose of preventing the tip of the pen from drying and preventing the ink from being inadvertently soiled. It is done. Such caps are roughly classified into those with clips and those without clips.
[0003]
When such an applicator is used by a child or an infant, there is a risk that the cap will be accidentally swallowed. If swallowed, the one without the clip has a risk of suffocation and death due to difficulty in air circulation to the trachea of a child or the like. Therefore, in a cap without a clip, it is necessary to use a means for ensuring air permeability.
[0004]
For such a purpose, a configuration disclosed in Utility Model Registration No. 2542155 is known as a representative cap for an applicator that ensures air permeability. FIG. 8 is a front sectional view and a plan view of a conventional applicator cap.
The applicator cap 100 according to the prior art is one in which an outer cap 101 and an inner cap 102 are separately formed and engaged and assembled in a later step.
That is, the outer cap 101 is a cylindrical member, and a rib 103 extending in the longitudinal direction is provided inside. A plurality of ribs 103 are provided radially, and all extend from one end portion of the outer cap 101 to the vicinity of the intermediate portion.
On the other hand, the inner cap 102 has a cylindrical shape in which one is a blocking wall 106 and the other is opened. Further, the open side has a flange portion 107 that is expanded in a funnel shape. An opening 108 is provided at the boundary between the enlarged diameter portion and the straight portion.
[0005]
In the cap 100 according to the prior art, the inner cap 102 is pushed in from the end of the outer cap 101 where the rib 103 is not provided, and the rib 103 of the outer cap 101 and the outer peripheral portion of the inner cap 102 are engaged with each other. It is held at the center of the outer cap.
[0006]
[Problems to be solved by the invention]
In the prior art applicator cap 100, air permeability is ensured in the longitudinal direction through the opening 108 of the inner cap 102 and the gap between the inner cap 102 and the outer cap 101. If the applicator cap 100 is swallowed, the air that has entered the inner cap 102 leaks between the inner cap 102 and the outer cap 101 from the opening 108, and the inner cap 102 and the outer cap 101 move along the rib 103. It flows through the space between them and is discharged from the end of the outer cap 101.
Of the series of air flow paths described above, the narrowest portion of the flow path is the opening 108 portion of the inner cap 102. Therefore, if the cap 100 is swallowed, whether the life can be maintained until the medical institution arrives depends on the size of the opening 108.
Therefore, it is desirable to design the opening 108 to be large.
On the other hand, however, the applicator cap 100 according to the prior art has the inner cap 102 integrally provided with the collar portion 107, and the inner cap 102 is inserted into the outer cap 101 by pressing the collar portion 107 side. Since it is necessary, when the opening 108 becomes large, the strength of the connecting portion between the flange portion 107 and the straight portion decreases, and the portion deforms when the inner cap 102 is inserted. Therefore, the cap 100 for the applicator according to the prior art is restricted in manufacturing by the area of the opening 108 and cannot secure a sufficient opening area. Therefore, if the cap 100 is swallowed, there is a concern that a sufficient airway cannot be secured.
[0007]
In view of the above-described problems of the prior art, the present invention provides a highly safe cap for an applicator that eliminates manufacturing problems and secures a sufficient gap between the heel portion and the straight portion. Is an issue.
[0008]
[Means for Solving the Problems]
And this invention for solving an above-mentioned subject has an outer cap and an inner cap, and an inner surface of the outer cap is provided with a collar portion penetrating the center and a rib extending in the longitudinal direction. One side is opened, and the inner cap is inserted into the outer cap, and the rib of the outer cap and the outer peripheral portion of the inner cap engage with each other, so that the inner cap is between the open end of the inner cap and the flange of the outer cap. Is a cap for an applicator characterized in that there is a gap , the rib is provided with a locking portion, and the end of the inner cap abuts on the locking portion . The applicator is a general term for tools that ooze liquids such as ink and glue from the nib, and has a concept including at least writing letters, writing lines, and coloring articles.
[0009]
In the applicator cap of the present invention, the collar portion is provided on the outer cap side, and it is not necessary to provide the collar on the inner cap. And in the cap for applicators of this invention, a space | gap is provided between the open end of an inner cap, and the rib of an outer cap, and the distribution | circulation of air is ensured through the said space | gap. The cap for an applicator of the present invention is one in which the inner cap is inserted inside the outer cap as in the prior art. In the present invention, the air is formed by the gap between the open end of the inner cap and the rib of the outer cap. It is not necessary to provide an opening in the inner cap. Therefore, in the present invention, there is little deformation when inserting the inner cap, and manufacturing is easy.
[0010]
[0011]
In the applicator cap of the present invention, the rib is provided with a locking portion such as a step, and the end of the inner cap abuts on the locking portion . Therefore, positioning when inserting the inner cap is easy. As the structure of the locking portion, for example, a step or a protrusion can be considered.
[0012]
The invention according to claim 1 , further comprising a protrusion provided on the outer peripheral portion of the inner cap, wherein the protrusion presses the rib and bites into the rib. It is a cap.
[0013]
In the applicator cap of the present invention, since the protrusion is provided around the inner cap, the inner cap is difficult to come off.
[0014]
Further, the protrusion is preferably a non- return shape having a triangular cross-sectional shape , and the triangular shape is preferably a shape that is gentle in the insertion direction of the inner cap and is substantially upright in the removal direction. .
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
Drawing 1 is a front sectional view and a top view of a cap for applicators of an embodiment of the present invention. FIG. 2 is an explanatory view for explaining an assembly procedure of the applicator cap of FIG. FIG. 3 is an exploded perspective view of the applicator cap of FIG. FIG. 4 is a front sectional view and a plan view of an applicator cap according to another embodiment of the present invention. FIG. 5 is an explanatory view for explaining an assembly procedure of the applicator cap of FIG. FIG. 6 is a front sectional view and a plan view of an applicator cap according to another embodiment of the present invention. FIG. 7 is a cross-sectional view of a mold showing a method for manufacturing the inner cap employed in the embodiment of FIG.
[0016]
In FIG. 1 thru | or FIG. 3, 1 shows the cap for applicators of this invention. The cap 1 is formed by injection molding using, for example, a thermoplastic resin such as polypropylene or polyacetal, and is a combination of a cylindrical outer cap 2 and an inner cap 3.
[0017]
That is, the outer cap 2 has a cylindrical shape, and a collar portion 6 is provided inside as shown in FIGS. The flange portion 6 has a funnel shape, and an opening is provided in the center portion. The collar 6 is provided to guide the tip of the pen to the center when a pen (not shown) is inserted.
A rib 8 is provided on the inner surface of the outer cap 2 on the tip side of the flange 6, that is, on the upper side in FIGS. In the present embodiment, eight ribs 8 are provided, and all of the ribs 8 extend from the vicinity of the top portion of the outer cap 2 to a portion reaching the flange portion 6. The ribs 8 are plate-shaped and are arranged radially, and the center of the inscribed circle of each tip portion coincides with the center of the outer cap 2.
[0018]
On the other hand, the inner cap 3 is a cylindrical member having one end closed and the other end opened. An annular protrusion 11 is provided at a portion near the outer end and close to the closed end. In the present embodiment, the protrusion 11 has a circular cross-sectional shape.
Further, in the innermost part of the inner cap 3, a housing part 12 into which a pen tip (not shown) of the applicator body is detachably fitted is provided.
Further, an annular protrusion 13 is formed at a site near the open end of the inner cap 3. The protrusion 13 is formed to maintain airtightness with a pen body (not shown).
[0019]
In the applicator cap 1 of the present embodiment, the inner cap 3 is press-fitted from the top side of the outer cap 2, the tips of the ribs 8 abut against the outer peripheral portion of the inner cap 3, and both are engaged. Further, the annular protrusion 11 of the inner cap 3 deforms a part of the rib 8 and bites into the rib 8.
And in the cap 1 for applicators of this embodiment, the open end of the inner cap 3 and the collar part 6 do not contact | abut, and the space | gap part 20 is provided between both.
Therefore, in the applicator cap 1 of this embodiment, the lower side (A side) and the upper side (B side) of FIG. 1 communicate with each other through the space 20 and the space formed between the inner cap 3 and the outer cap 2. is doing.
[0020]
That is, the air that has entered from the lower side of the cap 1 enters the flange portion 6 and escapes from the gap portion 20 to the outside of the inner cap 3. And it flows through the space between the inner cap 3 and the outer cap 2 along the rib 8, and is discharged | emitted from the edge part of the outer cap 2 to the upper part (B side). Therefore, even if the cap of this embodiment is swallowed by mistake, the minimum airway is secured.
Moreover, in the cap 1 of the present embodiment, since the inner cap 3 has no opening in the side surface portion, the inner cap 3 has high axial rigidity. For this reason, there is little fear of causing deformation when the inner cap 3 is inserted. Furthermore, in the present embodiment, the size of the gap 20 is not affected by manufacturing restrictions, and a sufficient area can be secured.
[0021]
In the above-described embodiment, the area of the gap 20 is determined by the insertion depth of the inner cap 3. The insertion depth is determined by the position setting of an insertion device (not shown), but a positioning function may be added to the cap itself.
For example, like the applicator cap 40 shown in FIGS. 4 and 5, the rib 41 is provided with a stepped portion (locking portion) 43, and the end of the inner cap 3 is brought into contact with the stepped portion 43 to The insertion depth of the cap 3 can also be determined.
[0022]
In the above-described embodiment, the annular protrusion is provided on the outer peripheral surface of the inner cap, but the presence / absence, number, shape, and the like of the protrusion are arbitrary.
As another example of the shape of the protrusion, a non-return shape such as the protrusion 61 shown in FIG. That is, the inner cap 63 of the cap 60 shown in FIG. 6 is provided with a protrusion 61 having a triangular cross-sectional shape. The triangular shape of the protrusion 61 is gentle in the insertion direction, and is closer to the upright state in the removal direction. Therefore, in the applicator cap 60 of this embodiment, the insertion work of the inner cap 63 is easy, and the inner cap 63 is difficult to be removed.
[0023]
The means for providing the above-described triangular projection 61 on the inner cap 63 is arbitrary. For example, as shown in FIG. 7, the parting line 71 of the injection mold 70 is used to form the inner cap. A protrusion 72 can be formed by providing a notch 72 at a portion corresponding to the open side of the, and filling the notch 72 with a resin.
[0024]
【The invention's effect】
The cap for an applicator according to the present invention ensures air circulation by the gap between the open end of the inner cap and the rib of the outer cap, and there is no need to provide an opening in the inner cap. Therefore, in the present invention, there is little deformation when inserting the inner cap, and manufacturing is easy. Moreover, since the size of the gap is not subject to manufacturing restrictions, a sufficient size can be ensured, and there is an effect of high safety.
[0025]
In the applicator cap of the present invention , the rib is provided with a step, and the end portion of the inner cap is in contact with the step. Therefore, positioning when inserting the inner cap is easy.
[0026]
Moreover, the cap for applicators according to claims 2 and 3 has an effect that the inner cap is difficult to come off.
[Brief description of the drawings]
FIG. 1 is a front sectional view and a plan view of an applicator cap according to an embodiment of the present invention.
FIG. 2 is an explanatory view for explaining the procedure for assembling the applicator cap of FIG. 1;
3 is an exploded perspective view of the applicator cap of FIG. 1. FIG.
FIG. 4 is a front sectional view and a plan view of a cap for an applicator according to another embodiment of the present invention.
FIG. 5 is an explanatory view for explaining an assembly procedure of the applicator cap of FIG. 4;
FIG. 6 is a front sectional view and a plan view of a cap for an applicator according to another embodiment of the present invention.
7 is a cross-sectional view of a mold showing a method for producing an inner cap employed in the embodiment of FIG.
FIG. 8 is a front sectional view and a plan view of a conventional applicator cap.
[Explanation of symbols]
1,40,60 Cap for applicator 2 Outer cap 3 Inner cap 6 Eaves part 8, 41 Rib 43 Step part (locking part)
11,61 protrusion

Claims (3)

An outer cap and an inner cap are provided, and an inner surface of the outer cap is provided with a flange portion through which the center passes and a rib extending in the longitudinal direction. One side of the inner cap is opened. Inserted inside, the rib of the outer cap engages with the outer periphery of the inner cap, there is a gap between the open end of the inner cap and the collar of the outer cap, and the rib has a locking part An applicator cap, wherein an end portion of the inner cap is in contact with the locking portion . The applicator cap according to claim 1 , wherein a protrusion is provided on an outer peripheral portion of the inner cap, and the protrusion presses the rib to bite into the rib. The protrusion is a check shape having a triangular cross-sectional shape , and the triangular shape is a shape that is gentle toward the insertion direction of the inner cap and is substantially upright in the removal direction. The cap for applicators according to claim 2 .

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