JP2002200883A - Cap for coating tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide caps for a coating tool, even under the condition that the connection of which with each other, the predetermined air flow passage can be ensured. SOLUTION: In a pair of the connectable caps 1 for the coating tool to be installed at both the ends of the coating tool, at least at one cap 1, an outer tubular part 10 and an inner tubular part 11 are integrally formed with each other under the state that some part on the blocked end 11a side of the inner tubular part 11 with its blocked one end is projected beyond the cylindrical outer tubular part 10 and an air flow passage communicating the inner space of the cap with outside is provided between the non-projected part 11d of the inner tubular part 11 and the inner peripheral wall 10a of the outer tubular part 10. Further, at least the projecting part 11c of the inner tubular part 11 is made so as to have a sectional shape developing clearances d between the circumcircle circumscribing the projecting part 11c and therewith.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an applicator cap to be mounted on various applicators such as a ball-point pen, a felt-tip pen and a marker. It is related to one with improved characteristics.

[0002]

2. Description of the Related Art In recent years, twin type ball-point pens, felt-tip pens, and markers have been widely used in which coating portions having different shapes are provided at both ends of a main body shaft. In many of such applicators, usually, one cap is removed, and the removed cap is put on the other cap and connected so as not to be lost. By the way, since the cap of such an applicator has a small shape, infants and children often play with their hands, which may cause accidents such as accidental swallowing and suffocation. Therefore, it is required by safety standards to provide a through hole for ensuring a predetermined air flow rate according to the shape of the cap. By providing such a through-hole, even if the cap is accidentally swallowed, a predetermined air flow path can be secured through the through-hole, and necessary treatment can be performed while maintaining breathing. is there. That is, applicators that comply with safety standards have been commercialized to protect precious lives.

[0003]

However, in the cap provided with the through-hole, the safety of the single cap is ensured, but the securing of the air flow path in a state where the caps are connected to each other is considered. There were many things that had not been done or were not enough. That is, as described above, if one cap is accidentally swallowed while being connected to the other cap, breathing cannot be maintained in many cases, and improvement has been desired. The present invention has been proposed in view of such conventional points, and has an object to provide a cap for an applicator that can stably secure a predetermined air flow path even when caps are connected to each other. And

[0004]

The present invention proposed to achieve the above object is a pair of connectable applicator caps mounted on both ends of an applicator, wherein at least one of the caps comprises: A part of the closed end side of the inner cylinder part whose one end is closed is protruded from the cylindrical outer cylinder part, and the inner space of the cap and the outer space are provided between the non-projection part of the inner cylinder part and the inner peripheral wall of the outer cylinder part. Are formed integrally as a shape provided with an air flow path communicating with the at least one of the inner cylindrical portions, at least the protruding portion has a cross-sectional shape that creates a gap between a circumscribed circle circumscribing the protruding portion, A gap formed between the outer surface of the inner cylinder portion of one cap and the inner peripheral wall of the other cap when the other caps are circumscribed and connected to the inner cylinder portion projection of one cap and the caps are connected to each other, The cap connected via the air passage of one cap The internal space of up to each other are configured to communicate with each other.

According to this configuration, the internal space of the cap and the outside communicate with each other through the air flow path provided between the non-projecting portion of the inner cylinder and the inner peripheral wall of the outer cylinder. Thus, even if a single cap is accidentally swallowed, the internal space of the cap and the outside can communicate with each other through this air flow path to maintain breathing.

Further, the caps can be connected to each other by externally engaging the other cap with the protruding portion of the inner cylinder portion of one cap. Here, the protrusion of the inner cylinder portion of one of the caps has a cross-sectional shape that produces a gap between the protrusion and the circumscribed circle circumscribing the protrusion. Therefore, when the other cap is externally engaged with and connected to the inner cylinder projecting portion, a gap is formed between the outer surface of the inner cylinder of one cap and the inner peripheral wall of the other cap. Since the gap created by this connection communicates with the air flow path provided in one of the caps, the internal spaces of the caps can communicate with each other in a state where the caps are connected to ensure an air flow path.

[0007] According to the cap of this configuration, the protrusion of the inner cylinder portion can be used as it is, and the other cap can be put on the protrusion and connected, and the air flow path is secured. This eliminates the need for a special configuration for connection, simplifies the configuration, and ensures safety. The cross-sectional profile of the inner cylinder projecting portion may be any shape as long as a gap is formed between the inner cylinder projecting portion and a circumscribed circle circumscribing the projecting portion, and various sectional shapes can be adopted. For example, it may have an appropriate cross-sectional shape such as a polygon or a shape obtained by deforming a polygon. In the cap for an applicator, the other cap may have a shape different from that of the one cap. That is, when the other cap has a shape having an inner cylinder portion and an outer cylinder portion, at least, the outer cylinder portion inner peripheral wall can be circumscribed and connected to the inner cylinder portion protrusion of the one cap, And if the air flow path that connects the internal space and the outside is formed,
Other portions can have an appropriate configuration. Thus, it is possible to connect one cap to the other cap so that the internal space between the caps communicates with the outside.

In the present invention, at least the projecting portion of the inner cylindrical portion may have a polygonal cross section. According to this configuration, the other cap can be circumscribed and connected to the ridge of the inner cylinder portion protrusion, and a gap can be generated between the inner cylinder portion protrusion and the inner peripheral wall of the other cap. . Thereby, the air flow path at the time of connection can be secured. As a special example of the polygon, the cross-sectional profile of the inner cylinder projecting portion can be formed into an equilateral triangle or a square. The protruding portion of the inner cylinder portion has a greater number of ridges as the cross-sectional outer shape is a polygon having a large number of corners, so that stable connection with the other cap can be performed. Becomes narrower. However, if the cross-sectional profile of the protrusion of the inner cylinder is a regular triangle or a square, stable connection can be obtained,
A sufficient gap is formed between the inner cylinder projecting portion and the outer peripheral wall of the outer cap of the other cap, and an air flow path is secured.

In the present invention, the outer surface of at least the protruding portion of the inner cylindrical portion may be formed by being deformed in a bulging direction or a retreating direction. When the cross-sectional shape of the inner cylinder projecting portion is formed as a polygon, and when the cross-sectional shape is an equilateral triangle or a square, a sufficient gap can be secured when the cap is connected. However, in the case of forming a polygon having five or more polygons, as described above, as the number of corners of the polygon increases, the gap formed at the time of connection narrows, and it becomes difficult to secure an air flow path. In such a case, for example, the outer surface of the inner cylindrical portion protruding portion may be deformed so as to be depressed in the retreating direction, so that the shape can be made wider. When it is difficult to secure the inner diameter of the airtight chamber provided inside the inner cylinder portion, the outer surface of the inner cylinder portion protrusion may be deformed so as to protrude in the bulging direction. .

In the present invention, at least the ridge of the protruding portion of the inner cylindrical portion is chamfered to a predetermined dimension to form a ridge, and the other cap is circumscribed and connected to the ridge. It can be. That is, when the ridge of the protruding portion of the inner cylindrical portion is chamfered, a planar ridge surface is formed by the chamfered portion. This ridge surface is in surface contact with the inner peripheral wall of the other cap and is in engagement therewith. As a result, the caps can be more stably connected as compared with the case where the ridges of the inner cylindrical portion projecting portions are brought into contact with the sides.

In the present invention, the inner cylindrical portion has a polygonal cross-sectional shape over the entire length, and the inner peripheral wall of the outer cylindrical portion circumscribes the non-projecting portion ridge of the inner cylindrical portion to be supported and integrated. It can be made the structure made by. According to this configuration, the other cap can be circumscribed and connected to the ridge of the inner cylinder projecting portion, and a gap is formed between the inner peripheral wall of the other cap and the inner cylinder projecting portion. Can be done. In addition, since the outer peripheral portion of the outer peripheral portion of the inner cylindrical portion is supported and integrated with the outer peripheral portion of the inner cylindrical portion, a gap is formed between the outer peripheral surface of the non-protruding portion of the inner cylindrical portion and the outer peripheral portion of the outer cylindrical portion. As a result, an air flow path that connects the internal space of the cap and the outside is formed.
Thereby, the air flow path can be secured when the cap is used alone and when the cap is connected.

In the present invention, the non-projecting portion ridge of the inner cylinder portion may be integrally formed by being connected to the inner peripheral wall of the outer cylinder portion by a joint provided along the ridge. . According to this configuration, the inner cylindrical portion has a polygonal cross-sectional shape over the entire length, and the ridge of the non-projecting portion of the inner cylindrical portion is integrated with the inner peripheral wall of the outer cylindrical portion by the joint. Thereby, the supporting strength can be improved as compared with the case where the non-projecting portion ridge is supported by the inner peripheral wall of the outer cylindrical portion and integrated.

Further, in the present invention, the caps may be formed in the same shape and connected to each other so as to be able to communicate with each other. That is, by making the pair of caps have the same shape, the outer peripheral portion of the other cap is circumscribed and connected to the protruding edge of the inner cylindrical portion of the other cap, or conversely, the other is formed. The inner peripheral wall of one of the caps can be connected by circumscribing the inner peripheral wall of the outer cylindrical portion of one of the caps to the protruding edge of the inner cylindrical portion of the cap. In any connection, the internal spaces of the caps can communicate with each other. .

[0014]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIGS. 1 and 2 show an applicator cap 1 according to a first embodiment of the present invention. 1A is a perspective view showing the applicator cap 1, FIG. 1B is a cross-sectional view taken along the line AA in FIG. 1A, and FIG.
FIG. 2 is a cross-sectional view taken along line BB of FIG. FIG.
1A is a view in the direction of arrow C in FIG. 1A, and FIG.
FIG. 3A is a view in the direction of arrow D in FIG.

The cap 1 for an applicator is a closed end 11a of an inner cylindrical portion 11 having one end closed from a hollow cylindrical outer cylindrical portion 10.
It has a shape with a part of the side protruding. The inner cylindrical portion 11 has a square cross-sectional shape over the entire length, and is chamfered at four ridge portions on the outer surface to form a narrow ridge surface 11b over the entire length of the inner cylindrical portion 11. ing. The inner cylindrical portion 11 is divided into a protruding portion 11c from the closed end 11a in the length direction and a non-protruding portion 11d extending to the open end 11e excluding the protruding portion 11c. Then, 4 of the non-projecting portion 11d of the inner cylindrical portion 11
The ridge surface 11b at the location is integrally supported and supported so as to be in contact with the outer peripheral wall 10a. That is,
The non-projecting portion 11d of the inner cylindrical portion 11 is included in and integrated with the outer cylindrical portion 10, and the projecting portion 11c has a shape protruding from the outer cylindrical portion 10. A hollow cylindrical airtight chamber 11f for airtightly storing a pen tip of an applicator (not shown) is provided inside the inner cylindrical portion 11 at a predetermined depth from the open end 11e to the closed end 11a. Have been.

As described above, the cap 1 for an applicator has an inner cylindrical portion 1 having a square cross section on the inner peripheral wall 10a of the outer cylindrical portion.
1 is a shape including a part of it. Thus, four gaps d are formed between the outer surface 11g of the inner cylinder portion and the inner peripheral wall 10a of the outer cylinder portion, and the gaps d form the air flow path 1c. That is, the internal space of the cap 1 and the outside communicate with each other via the air flow path 1c. Thereby, even if the cap 1 alone is accidentally swallowed, four air flow paths 1c are secured, and it is possible to perform necessary treatment while maintaining breathing. Is secured.

The cap for an applicator of the present embodiment is
The present invention is characterized in that the applicator caps 1 having the same shape are interconnected to secure an air flow path.
FIG. 3 is a perspective view showing a state in which an air flow path is formed when the applicator caps 1 shown in FIGS. 1 and 2 are connected to each other. In the figure, two caps are used as caps 1a.
And a cap 1b, and for convenience of explanation, are shown as a state in the middle of connection before reaching a complete connection state. When connecting the applicator caps 1a and 1b, the cap 1
The cover 11a is connected to the projection 11c of the inner cylinder 11 by covering the open end 10b of the outer cylinder 10 of the cap 1b. That is, the caps 1a and 1b are pressed and inserted into the ridge surface 11b provided on the protruding portion 11c of the cap 1a so that the inner peripheral wall 10a of the outer cylindrical portion 10 of the cap 1b is circumscribed and brought close to each other. connect.

When the caps 1a and 1b are connected in this way, four gaps d1 are formed between the inner peripheral wall 10a of the outer cylindrical portion of the cap 1b and the outer surface 11g of the projection 11c of the cap 1a. You. Therefore, cap 1
a and 1b are connected, the air flow path 1 is opened from the open end 10b of the outer cylindrical portion 10 of the cap 1a through the internal space.
c, the gap d1, one air flow path L is formed through the internal space of the cap 1b and the air flow path 1c, and it is possible to secure a stable air flow. In addition, cap 1
Since a and 1b have the same shape, it is necessary to cover and connect the open end 10b of the outer cylinder portion 10 of the cap 1a to the projection 11c of the inner cylinder portion 11 of the cap 1b, contrary to the connection shown in FIG. The same air flow path L can be formed.

The above-mentioned cap 1 is manufactured by injection molding a synthetic resin material and integrating it. That is, cap 1
In this example, the inner cylinder portion 11 is integrated with the outer cylinder portion 10 and injection-molded, and the polygonal ridge surface 11b of the inner cylinder portion is brought into contact with the outer peripheral wall 10a. According to this configuration,
Compared to a configuration in which flat ribs or the like are provided between the inner cylindrical portion 11 and the outer cylindrical portion 10 so as to be integrated, the change in wall thickness can be suppressed, and the occurrence of sink in a molded product can be suppressed. In addition, since the occurrence of sink marks is suppressed, the airtight chamber 1 of the inner cylindrical portion 11 is formed.
The roundness of 1f is improved, the airtightness is improved, and the finish of the outer cylinder portion 10 is also good.

The cap 1 of the present embodiment has a square cross-sectional shape over the entire length of the inner cylindrical portion 11, and the outer surface 11g of the inner cylindrical portion 11 is flat. However, the present invention is not limited to such a configuration. For example, a configuration in which only the protruding portion 11c of the inner cylindrical portion 11 is formed in a square shape can be adopted. Hereinafter, an embodiment having such a configuration will be described.

(Second Embodiment) FIG. 4A is a perspective view showing an applicator cap 2 according to a second embodiment of the present invention, and FIG. 4B is an AA arrow of FIG. 4A. Sectional view, FIG. 4 (c)
4A is a sectional view taken along the line BB in FIG. 4A, and FIG.
FIG. 4A is a view in the direction of arrow C, and FIG. 4E is a view in the direction of arrow D in FIG. Note that the cap 2 of the present embodiment is a modification of the cap 1 shown in FIG. 1, and the same components are denoted by the same reference numerals, and redundant description will be omitted. FIG. 4A shows the outer cylinder part 10 in a broken state.

The inner cylindrical portion 11 of the cap 2 has a protruding portion 11c.
Is a square, and the non-projecting portion 11d is a circle. That is, the protruding portion 11c of the inner cylindrical portion 11 has the same shape as the cap 1 described above, and the shape of the non-protruding portion 11d is changed. The protruding portion 11c of the inner cylindrical portion 11 is shaped to be inscribedly engaged with the inner peripheral wall 10a of the outer cylindrical portion of another cap 2. On the other hand, the non-projecting portion 11d of the inner cylindrical portion 11 has a circular shape inscribed in a square which is a cross-sectional outline of the projecting portion 11c, and the length of the non-projecting portion 11d is slightly longer than that of the projecting portion 11c. As a result, a gap d is formed between the non-projecting portion outer peripheral wall 11g 'of the inner cylindrical portion 11 and the outer cylindrical portion inner peripheral wall 10a to form the air flow passage 2a.

The non-projecting portion outer peripheral wall 11g 'of the inner cylindrical portion 11
Is provided with four short ribs 11h in the axial direction from the end of the outer cylindrical portion 10, and by these ribs 11h,
Non-projecting portion outer peripheral wall 11g 'of inner cylindrical portion 11 and outer cylindrical portion inner peripheral wall 1
0a are connected and integrated. In this way, by making the length of the rib 11h shorter than the length of the inner cylindrical portion 11, the occurrence of sink during injection molding is suppressed, and the roundness of the airtight chamber 11f is improved. In the present embodiment, the rib 11h is provided on the non-projecting portion outer peripheral wall 11g 'so as to be located between the ridge surfaces 11b of the projecting portion 11c. However, the rib 11h may be provided on the extension of the ridge surface 11b. good.

According to the cap 2 having such a configuration, the internal space communicates with the outside through the air flow path 2a.
Even if the single cap 2 is accidentally swallowed, breathing can be maintained. Further, the protruding portion 1 of the inner cylindrical portion 11
The outer cylindrical portion inner peripheral wall 10a of another cap 2 can be circumscribed and engaged with the ridge surface 11b provided on the 1c.
Also in this connection state, the internal space of the caps 2 and the outside communicate with each other as in the case where the caps 1 are connected to each other. Thereby, even if the cap 2 is swallowed by mistake while connected to each other, it is possible to maintain necessary breathing and perform necessary treatment.

In the above-described cap 2, the inner cylindrical portion 11
The rib 11h is provided between the non-projecting portion outer peripheral wall 11g 'and the outer cylindrical portion inner peripheral wall 10a, but the present invention is not limited to such a configuration. For example, between the non-projecting portion outer peripheral wall 11g 'of the inner cylindrical portion 11 and the outer cylindrical portion inner peripheral wall 10a, a support portion connecting them is provided along the entire circumference along the circumferential direction, and a communication hole is formed in this support portion. It is good also as a structure provided so that an air flow path may be ensured.

(Third Embodiment) Next, an embodiment of an applicator cap 3 in which the above-described applicator cap 1 is modified will be described. FIG. 5A is a perspective view showing the cap 3.
FIG. 5B is a view in the direction of arrow A in FIG. 5A, and FIG. 5C is a view in the direction of arrow B in FIG. 5A. The same components as those of the cap 1 shown in FIG.
A duplicate description will be omitted. In the present embodiment, the cap 3
The inner cylindrical portion 11 has a square cross section over the entire length,
Four ridges 11j of the non-projecting portion 11d are in a shape inscribed in the inner peripheral wall 10a of the outer cylindrical portion 10. That is, unlike the cap 1 shown in FIG. 1, the inner cylindrical portion 11 is not chamfered. And, in the non-projecting portion 11d of the inner cylindrical portion 11,
Joints 11i are provided on both sides of the ridge 11j along the entire length of the non-projecting portion 11d along the ridge 11j. That is, a joining portion 11i having a predetermined width is provided in a portion where the ridge 11j of the inner cylinder portion 11 is inscribed in the outer cylinder portion inner peripheral wall 10a.
1i, the non-projecting portion 11d of the inner cylinder portion 11 is connected to the inner peripheral wall 10a of the outer cylinder portion to be integrally formed by injection molding.

According to this configuration, the ridge 11 of the inner cylindrical portion 11
As compared with a configuration in which the inner cylinder portion 11 is inscribedly engaged with the inner peripheral wall 10a of the outer cylinder portion 10 alone, the support strength of the inner cylinder portion 11 by the outer cylinder portion 10 can be increased at the joint portion 11i, and the strength of the cap 3 can be increased. improves. Since the cap 3 has the air flow path 1c formed by the gap d as in the case of the cap 1 shown in FIGS. 1 and 2, it is sufficient for both the cap 3 alone and when the caps 3 are connected to each other. An air flow path can be secured. Also, since there is little change in wall thickness due to the joining portion 11i, there is little occurrence of sink during molding as in the case of the aforementioned cap 1, and the roundness of the airtight chamber 11f of the inner cylinder 11 and the appearance of the outer cylinder 10 are also good. It is.

By the way, in the cap 3 of the present embodiment,
When the inner peripheral wall 10a of the outer cylindrical part 10 of the other cap 3 is connected to the protruding part 11c of the inner cylindrical part 11 by circumscribing engagement, the ridge 11j of the protruding part 11c is in side contact with the inner peripheral wall 10a (line contact state). ) To engage. For this reason, when connection and disconnection are repeated, the ridge 11j of the protruding portion 11c may be deformed and worn, and stable connection may be impaired.

Therefore, in this embodiment, in order to maintain a stable connection, the engaging portion usually provided on the cap for the applicator is positively used. That is, usually, the cap 3 has an inner peripheral wall 10 a near the open end 10 b of the outer cylindrical portion 10.
The engaging projection 10c having a substantially semicircular cross section is
It is provided in a loop along 0a. On the other hand, although not shown in the drawing, the coating tool main body shaft to which the cap 1 is attached has
An engagement recess corresponding to the engagement protrusion 10c is provided. When the cap 3 is mounted on the main body shaft of the applicator, the user can be given a secure mounting feeling by responding to the engagement convex portion 10c fitting into the engagement concave portion or by making a slight noise. In the present embodiment, the engagement convex portion 10c of the cap 3 is positively used, and the inner convex portion 1c is
By pressing and engaging the ridge 11j of the ridge 1
1j is configured to maintain a stable connection while being slightly deformed.

(Modification) Next, a modification of the above-described embodiment will be described. In the cap 1 shown in FIG. 1, the cross-sectional outer shape is a square (in a state in which chamfering is performed) over the entire length of the inner cylindrical portion 11, but may be a shape in which the cross-sectional outer shape is deformed. That is, the outer surface 11g of the inner cylindrical portion 11 may be depressed in the retreating direction or may be formed in a shape expanding in the expanding direction. FIG. 6 shows the cap 1 ′ having such a shape as viewed from the open end 10 b side of the outer cylindrical portion 10. In the cap 1 ′, the entire outer surface 11 g of the inner cylindrical portion 11 has a shape that is concavely curved toward the retreating direction. As a result, the area of the gap d increases, and the flow rate of air flowing through the air flow path 1c can be increased. That is, the air flow rate as a single cap 1 'can be increased, and the air flow rate when the caps 1' are connected to each other also increases. Although not shown in the figure, the outer surface 11g of the inner cylindrical portion 11 can be formed in a curved shape in the bulging direction, which is effective as a countermeasure when the diameter of the airtight chamber 11f cannot be secured. .

FIG. 7 shows the cap 2 shown in FIG.
5 shows an example in which a cap 2 ′ is formed by performing the same deformation as the cap 1 ′ shown in FIG.
It is shown as a state viewed from the 0b side. In the cap 2 ', the outer surface 11g of the protruding portion 11c of the inner cylindrical portion 11 is concavely curved in the retreating direction. Thereby, a gap (not shown) formed when the caps 2 'are connected to each other is widened, and the air flow rate can be increased. That is,
The air flow rate as a single cap 2 'is the same,
The gap formed when the caps 2 'are connected to each other can be widened, and a stable air flow path with reduced flow path resistance can be secured.

FIGS. 8 (a) to 8 (e) show caps having an inner cylindrical portion having various cross-sectional shapes.
Each drawing shows a modified example of the cap 1 shown in FIG. 1 when viewed from the open end side of the cap, and the same components are denoted by the same reference numerals.

The cap 40 shown in FIG. 8 (a) has a cross section of the inner cylindrical portion 11 in the shape of a "cherry blossom", and the five ridges 11k of the cherry blossom abut on the inner peripheral wall 10a of the outer cylindrical portion. It is formed integrally. In the cap 40, since the inner cylindrical portion 11 is formed in the shape of a petal of cherry blossoms, a decorative effect is achieved, and the cap 40 alone and the air flow path in the connected state are secured.

The cap 41 shown in FIG. 8 (b) has a cross section of the inner cylindrical portion 11 having a "star" shape.
11 m of the ridges are abutted on the inner peripheral wall 10 a of the outer cylindrical portion to be integrally formed. Also in this cap 41, since the inner cylindrical portion 11 is formed in a star shape, a decorative effect is exhibited and the air flow path is ensured.

The cap 42 shown in FIG.
The cap 40 shown in (a) is further deformed, and the cross-sectional outer shape of the inner cylindrical portion 11 has a shape in which “sakura flower” is abstracted. In this example, the air flow path 1c is narrow, but the shape can be appropriately changed to secure a necessary air flow rate.

The cap 43 shown in FIG. 8D is formed in a knurled shape in which a number of narrow grooves are provided on the outer peripheral wall of the inner cylindrical portion 11 in the axial direction. The air passage 1c is formed by a number of grooves.

The cap 44 shown in FIG.
In the cap 1 'shown in FIG. 6, an example is shown in which the cross-sectional outer shape of the inner cylindrical portion is further modified. That is, the cap 1 'has a shape in which the cross-sectional shape of the inner cylindrical portion is a square, but the cap 44 is a shape in which a regular triangle is deformed, so that a larger air flow path 1c can be formed.

Next, the cap 45 shown in FIGS. 9 (a) and 9 (b) includes the outer cylindrical portion 10 and the inner cylindrical portion 11 which is in contact with and supported by the outer cylindrical portion 10. Inside,
A configuration is provided in which a cylindrical airtight portion 12 that forms the airtight chamber 11f is provided. Note that FIG. 9A illustrates a state in which the cap 45 is viewed from the open end side, and FIG. 9B illustrates a state in which the cap 45 is viewed from the closed end side of the inner cylinder. This cap 45 is a structure in which the cross-sectional outer shape of the inner cylindrical portion 11 is formed by deforming a square, and the end of the airtight portion 12 is fixed to the closed end side of the inner cylindrical portion 11. According to the cap 45, similarly to the above-described embodiment, the cap alone and the air flow path in the connected state can be secured.

The cap 46 shown in FIGS. 10 (a) and 10 (b) is the same as the cap 45 shown in FIG. In this cap 46 as well, as in the above-described embodiment, the cap alone and the air flow path in the connected state can be secured.

The caps 40 to 4 shown in FIG.
4, and the caps 45 and 46 shown in FIGS. 9 and 10 have been described as examples in which various shapes are applied to the inner cylindrical portion having the same cross-sectional shape over the entire length. It is also possible to apply these shapes.

In the above-described cap for an applicator according to the present invention, the cross-sectional outer shape of the inner cylindrical portion may be formed as a pentagon or a polygon having more than three angles. In particular, in a configuration in which a product name, a logo, or the like is printed or marked on the closed end of the inner cylinder portion, the inner cylinder portion is formed into a polygon with a large number of corners, and the area of the closed end is increased, so that printing or engraving is easily performed. Can be formed in any shape. Further, when the cross-sectional outer shape of the inner cylindrical portion is formed as a polygonal shape, the area of the gap d decreases,
As in the case of the cap 1 shown in FIG. 4, the outer surface of the inner cylindrical portion is formed in a slightly curved shape in the retreating direction, so that the area of the gap d can be increased to secure a necessary air flow rate. It is. In this case, by making the outer surface of the inner cylinder portion a curved surface in consideration of the area of the closed end of the inner cylinder portion, a necessary air flow rate can be secured while facilitating printing and marking.
Although the cap manufacturing method is not described in the above embodiment, for example, the cap can be integrally formed by injection molding of a synthetic resin material.

[0042]

According to the cap for an applicator of the present invention, the inner cylindrical portion having a polygonal cross section is used for connecting the caps as they are and the gap generated between the outer cylindrical portion and the inner cylindrical portion is utilized. And a rational configuration that also secures an air flow path at the time of connection. As a result, sufficient safety can be ensured with a simple configuration, and cost reduction can be achieved.

[Brief description of the drawings]

FIG. 1A is a perspective view of an applicator cap according to an embodiment of the present invention, FIG. 1B is a cross-sectional view of FIG.
(C) is a sectional view taken along the line BB of (a).

2A is a view in the direction of arrow C in FIG. 1A, and FIG. 2B is a view in the direction of arrow D in FIG. 1A.

FIG. 3 is a perspective view showing a state where the caps shown in FIG. 1 are connected to each other.

4A is a perspective view of an applicator cap according to another embodiment of the present invention, FIG. 4B is a cross-sectional view taken along the line AA of FIG. 4A, and FIG. FIG. 3B is a cross-sectional view as viewed from the direction of the arrow B, FIG. 4D is a view as viewed from the direction of the arrow C in FIG. 4A, and FIG.

5A is a perspective view of an applicator cap according to another embodiment of the present invention, FIG. 5B is a view of FIG.
(C) is a view in the direction of arrow B in (a).

FIG. 6 is an explanatory view showing an embodiment in which the applicator cap shown in FIG. 1 is modified.

FIG. 7 is an explanatory view showing an embodiment in which the applicator cap shown in FIG. 4 is modified.

FIGS. 8A to 8E are explanatory views showing a modified embodiment of the present invention.

FIGS. 9A and 9B are explanatory views showing another modified embodiment of the present invention.

FIGS. 10A and 10B are explanatory views showing still another modified embodiment of the present invention.

[Explanation of symbols]

1,1 ', 2,2', 3,40,41,42,43,4
4, 45, 46 Coating tool cap 1c Air flow path 10 Outer tube portion 10a Outer tube portion inner peripheral wall 11 Inner tube portion 11a Closed end 11b Non-projecting portion ridge (ridge surface of non-projecting portion) 11c Projecting portion (inner tube portion) 11d Non-projection (projection of inner cylinder) 11h Joint d, d1 Gap

Claims (7)

[Claims] 1. A pair of connectable applicator caps mounted on both ends of an applicator, wherein at least one of the caps is a closed end of an inner cylindrical part having one end closed from a cylindrical outer cylindrical part. A part of the side is protruded, and between the non-projecting portion of the inner cylinder portion and the inner peripheral wall of the outer cylinder portion is integrally formed as a shape provided with an air flow path communicating the internal space of the cap and the outside, At least the projecting portion of the inner cylindrical portion has a cross-sectional shape that produces a gap between the projecting portion and a circumscribed circle circumscribing the projecting portion. When the caps are connected to each other, the gap formed between the outer surface of the inner cylindrical portion of the one cap and the inner peripheral wall of the other cap is connected to the air flow path of the one cap. That the internal spaces of the closed caps communicate with each other Applicator cap, characterized. 2. The applicator cap according to claim 1, wherein at least the projecting portion of the inner cylindrical portion has a polygonal cross section. 3. The cap for an applicator according to claim 2, wherein at least the outer surface of the protruding portion of the inner cylindrical portion is formed by being deformed in a bulging direction or a retreating direction. 4. A ridge surface is formed by chamfering at least a ridge of a protrusion of the inner cylindrical portion with a predetermined dimension, and the other cap is circumscribed and connected to the ridge. The cap for an applicator according to claim 2 or 3, wherein: 5. The inner cylindrical portion has a polygonal cross section over its entire length, and the inner peripheral wall of the outer cylindrical portion circumscribes and supports the non-projecting portion ridge of the inner cylindrical portion to be integrated. The cap for an applicator according to claim 1, wherein the cap is formed by forming the cap. 6. The non-projecting portion ridge of the inner cylinder portion is integrally formed by being connected to the inner peripheral wall of the outer cylinder portion by a joint provided along the ridge. 6. The cap for an applicator according to 5. 7. The cap for an applicator according to claim 1, wherein the caps have the same shape and are connected to each other so that they can communicate with each other.