JPH08281192A - Liquid applicator of writing utensil or dressing utensil - Google Patents

Abstract

PURPOSE: To provide the subject liquid applicator capable of setting the pressing force of a knock part low to fit the same to general use and capable of easily performing knocking operation while holding the erroneous operation preventing function of the knock part. CONSTITUTION: In a writing utensil equipped with a shaft cylinder 1 storing ink, the knock part 12 provided to the tail end of the shaft cylinder is knocked in an axial direction to open the valve provided in the knock part to allow the ink to flow out of a pen tip. The tail plug 13 integrally equipped with the knock part 12 is fitted in the rear end opening of the shaft cylinder 1 and the knock part 12 shows a bottomed cylindrical shape and has a thin-walled part 14 deformed in a restorable manner at the time of knocking operation provided to the peripheral wall thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid applicator such as a writing implement and a cosmetic implement.

[0002]

2. Description of the Related Art Conventionally, in a writing instrument in which ink is directly stored in a barrel or a liquid applicator such as a makeup tool in which liquid cosmetics such as nail polish is stored in a barrel, ink or nail polish is discharged. A valve device is often mounted inside the barrel for the purpose of controlling the amount. As one of the knock mechanisms for opening and closing the valve, there is one in which a bellows shaft portion is provided on a shaft cylinder and the squeeze property of the bellows shaft portion is utilized to allow knocking in the axial direction. -1098080 publication, fairness 6-
18616).

[0003]

By the way, in the above-mentioned conventional liquid applicator provided with the bellows shaft portion, since the squeeze property is utilized as described above, the pressing force of the bellows shaft portion is suitable for normal use. It is desirable to set it as low as possible. Specifically, it is considered preferable to set the wall thickness of the bellows shaft portion to about 0.3 to 0.4 mm. However, due to the wall thickness (usually about 0.8 mm) of the barrel of the barrel provided with the bellows, the barrel cannot be procured in a blow container by direct blow or injection blow, resulting in the bellows. It was difficult to mold the part to the above wall thickness dimension.

The present invention has been made in view of the above conventional problems, and in a liquid applicator provided with a knock mechanism, the pressing force of the knock portion can be set low in accordance with normal use, and the knock An object of the present invention is to provide a liquid applicator such as a writing implement and a makeup implement that can easily perform a knocking operation while maintaining the function of preventing malfunction of the portion.

[0005]

The present invention has the following configuration to achieve the above object. That is, the invention of claim 1 is a liquid applicator such as a writing implement and a makeup implement having a shaft cylinder for storing the coating liquid therein, wherein the knocking part provided at the tail end is knocked in the axial direction. A valve provided inside to allow the coating liquid to flow out from the pen tip, wherein a tail plug having the knock portion is fitted to the rear end opening of the barrel, Department is
A liquid applicator, such as a writing implement and a cosmetic implement, having a thin wall that is deformable so that it can be restored when knocked.

The invention of claim 2 is characterized in that the tail plug is integrally formed with a cover part formed around the knock part to prevent malfunction of the knock part. It is a liquid applicator such as the writing implements and cosmetics described above.

According to a third aspect of the present invention, the peripheral wall of the cover portion is provided with a notch which is opened rearward and into which a finger can be inserted. It is an applicator.

[0008]

According to the invention of claim 1, the tail plug provided with the knock portion is fitted into the rear end opening of the barrel to form a thin wall which is deformable in the knock portion so as to be recoverable. Therefore, the user can knock the knocking portion by deforming the thin wall, thereby opening the valve and allowing the coating liquid to flow out to the pen tip. Therefore, according to the present invention in which the knock portion is formed separately from the barrel while holding the knock mechanism, the knock portion can be formed regardless of the wall thickness of the barrel. Therefore, the thin wall can be formed to have a thickness of, for example, about 0.3 to 0.4 mm, and the pressing force of the knock portion can be set to a low value according to normal use.

According to the second aspect of the present invention, the tail plug is integrally formed with a cover part formed around the knock part to prevent malfunction of the knock part.
It is possible to prevent a malfunction of the knock portion when the cap is attached. Moreover, the rear part structure can be simplified and the cost can be reduced by integrating the cover part.

Further, according to the invention of claim 3, the peripheral wall of the cover portion is provided with a notch which is opened rearward and into which a finger can be inserted. Therefore, the user can cover the notch with the notch. You can knock the knock part by inserting your finger avoiding. Therefore, it is possible to easily perform the knock operation while maintaining the malfunction prevention function of the knock portion.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. The drawing shows a writing instrument that is an embodiment of the present invention.

The first embodiment, as shown in FIGS. 1 and 2, is a writing instrument provided with a shaft cylinder 1 for storing ink (an example of a coating liquid) therein, and a knock portion provided at the tail end. 12
By axially knocking, the valve provided inside is opened to allow the coating liquid to flow out from the pen tip. A tail plug 13 integrally provided with a knock portion 12 is fitted into the rear end opening of the barrel 1. The knock portion 12 has a bottomed tubular shape, and has a thin wall 14 which is deformable in a recoverable manner at the time of knocking operation on the peripheral wall.

The tail plug 13 is formed by integrally molding a knock portion 12 and a cover portion 15 which is formed around the knock portion 12 and prevents the knock portion 12 from malfunctioning. A notch 17 that is opened rearward and allows a finger to be inserted is provided on the peripheral wall of the.

The structure of each section will be described in detail below. First, the shaft cylinder 1 is made of a soft synthetic resin and is open at both front and rear ends. A valve seat 2 is fitted in the front end opening, and a spring receiver 3 is fitted in the valve seat 2 from the pen tip side. An ink tank 4 is formed in the rear space of the valve seat 2, and an ink stirring ball 5 is movably inserted therein.

The valve rod 6 has a large-diameter portion 6a at its front end, and a step portion 6b facing forward on the outer surface of the large-diameter portion 6a. A rear end of the large-diameter portion 6a is a step portion 6c that is tapered in diameter, and a small-diameter portion 6d is extended behind the step portion 6c. Further, at the rear end of the small diameter portion 6d, the connecting small diameter portion 6e
Are formed. By disposing the large-diameter portion 6a in the space portion surrounded by the valve seat 2 and the spring receiver 3 described above, the tapered step portion 6c behind the large-diameter portion 6a contacts the opening edge portion of the valve seat 2. Allows contact and disconnection. Also, the small diameter portion 6d
Of the valve seat 2 penetrates the rear end surface of the valve seat 2 and projects rearward, and the connecting small diameter portion 6e at the rear end thereof is press-fitted and connected to the front end opening of the long thin pipe 7. Also, the stepped portion 6b of the large diameter portion 6a at the front end
A valve spring 8 is stretched and assembled between the valve spring 8 and the rear surface of the spring receiver 3 in front of the valve spring 6.
It always receives the elastic force of and is movable in the axial direction.

The small-diameter pipe 7 connected to the rear end of the valve rod 6 has its rear end connected to a rib 19 (described later) of the knock portion 12 of the tail plug 13. On the other hand, on the outer peripheral surface of the front end of the shaft cylinder 1, a front shaft 9 holding the flange portions 2a and 3a of the valve seat 2 and the spring receiver 3 overlapped with the front end edge of the shaft cylinder 1 is screwed. A rib 9a is formed in the center hole of the front shaft 9 so as to protrude in the radial direction toward the center from a required position on the inner surface (position of every 120 ° in the circumferential direction). The rib 9a serves as a felt as a coating member. A pen core 10 made of, for example, a product is gripped. The rear end surface of the pen core 10 is in contact with the front end surface of the protrusion 3b provided at a required position (position of every 120 ° in the circumferential direction) of the inner edge portion of the center hole of the spring receiver 3. An intermediate diameter portion 9b is formed at a substantially central position in the axial direction of the front shaft 9,
A sponge body 11 is attached to the inner hole of the intermediate diameter portion 9b. The rear end of the pen core 10 and the protrusion 3b of the spring receiver 3 are fitted into the center hole of the sponge body 11, and the rear end surface of the sponge body 11 is in contact with the front surface of the spring receiver 3. A cap 16 (see FIG. 1) is detachably fitted to the outer peripheral portion of the front shaft 9 in front of the barrel 1.

Next, the structure of the tail plug 13 will be described. Tail plug 1
As shown in FIG. 2, 3 is a substantially cylindrical fixing portion 18 that is fitted into the rear end opening of the shaft cylinder 1, and the knock portion 12 in which the thin wall 14 is connected to the rear end of the fixing portion 18. Fixed part 18
Is a resin molded product integrally formed by injection molding or the like with the cover portion 15 connected to the outer periphery of the connecting portion between the thin wall 14 and. The tail plug 13 is attached to the rear end opening of the barrel 1 by a fixing means such as press fitting or fusion bonding.

The knock part 12 has a substantially cylindrical shape with a bottom.
As shown in FIG. 2, the thin wall 14 formed in the front portion of the knock portion 12 includes a large diameter portion 14a on the fixed portion 18 side and a small diameter portion 14b on the bottom wall side of the knock portion 12, Is formed thinner than the other parts and the thickness of the barrel 1.
It has the desired squeeze property. Further, on the inner surface of the bottom wall of the knock portion 12, a rod-shaped rib 1 connected to the small diameter pipe 7 is provided.
9 are integrally formed.

The front end of the cover portion 15 is connected to the outer periphery of the rear end of the fixing portion 18, and the cover portion 15 extends rearward in a substantially cylindrical shape so as to conceal the knock portion 12 from the connecting portion. The rear end of the cover portion 15 is located slightly behind the bottom wall of the knock portion 12 in a side view (see FIG. 2). Cutout 17
Is a shape in which one side (upper side in FIG. 3) in the axial radial direction of the virtual cylinder line (see FIG. 3) at the rear of the cover portion 15 is deleted.
The position of the rear end of the cover portion 15 with respect to the bottom wall of the knock portion 12 and the shape of the notch 17 can be appropriately changed depending on the usage conditions and the like.

According to the first embodiment having the above construction, the bottom wall of the knock portion 12 is knocked in the axial direction to deform the thin wall 14 as shown in FIG. Immerse in the forward direction, and the small diameter pipe 7
Is pressed to move forward, and the valve rod 6 connected to the front end of the small diameter pipe 7 is moved forward while compressing the valve spring 8 to open the valve seat 2 and supply ink from the ink tank 4 to the pen core 10. be able to.

On the other hand, when the pushing force is removed from the bottom wall of the knock portion 12 to stop the knock operation, the restoring force of the compressed valve spring 8 causes the knock portion 12 to pass through the valve rod 6, the small diameter pipe 7 and the rib 19. A pressing force is applied to the back surface of the bottom wall of No. 1 to restore the deformed thin wall 14 to its original form. At the same time, the stepped portion 6c of the valve rod 6 contacts the valve seat 2 to close the valve, and the ink supply is stopped.

Therefore, in the first embodiment, since the knock portion 12 is formed separately from the barrel 1 while holding the knock mechanism, the knock portion 12 is formed regardless of the wall thickness of the barrel 1. it can. Therefore, the wall thickness t of the thin wall 14 is, for example, 0.3.
The tail plug 13 can be molded so as to be about 0.4 mm, and thus the pressing force of the knock portion 12 can be set low according to normal use.

Further, since the tail plug 13 is formed by integrally molding the cover portion 15 for preventing malfunction and the knock portion 12, malfunction of the knock portion 12 can be prevented. That is, when the palm area is wider than the opening area of the cover portion 15, it is impossible to press the knock portion 12 by being blocked by the cover portion 15. Further, for example, when the cap 16 is fitted, the tail plug 13 is supported by the palm area. Even in such a case (usually, it is unnatural to support the tail plug 13 side with a fingertip or the like in such a case), and the thin wall 14 is not deformed by mistake, and unintentional valve opening can be prevented. . In addition, the cover portion 15
It is also possible to simplify the rear structure of the writing instrument and integrate it at a low cost.

Further, since the rib 19 is provided on the bottom wall of the knock portion 12, the stirring ball 5 is used when assembling the writing instrument.
Is arranged at a position off the axis center. This can prevent the stirring ball 5 from being caught between the tail plug 13 and the small-diameter pipe 7. That is, at the time of assembling the writing instrument, the tail plug 13 is fixed to the rear end opening of the barrel 1, the stirring ball 5 and the ink are put into the barrel 1, and then the small diameter pipe 7 is inserted with the pen tip facing upward. In doing so, the stirring ball 5 is placed at a position deviated from the axial center as shown in FIGS. 2 and 3, which causes a problem such that the stirring ball 5 is sandwiched between the small-diameter pipe 7 and the tail plug 13. Absent.

Further, since the cover portion 15 is provided with the notch 17, the user can knock the knock portion 12 by putting a finger in the notch 17 while avoiding the cover portion 15, and the cover portion 15 can be knocked. It becomes possible to easily perform the knocking operation while maintaining the malfunction prevention function of 15.

Next, the writing instrument of the second embodiment will be described. The knock portion 21 of the tail plug 20 according to the second embodiment is
As shown in FIG. 4, a thin wall 22 formed in a stepwise shape similar to that of the first embodiment, and a pair of front and rear ribs integrally formed in a bar shape at a substantially central portion of the thin wall 22 in a cross sectional view. 23
a and 23b, and a knock cap 24 that is fitted to the rear rib 23b and slides when knocked. The structure other than the tail plug 20 is the same as that of the first embodiment.

The rib 23a on the front side projects toward the ink tank 4 and has the same function as the rib 19 of the first embodiment, and agitates between the tail plug 20 and the small diameter pipe 7. The ball 5 is prevented from being caught. The knock cap 24 is a tapered molded product whose diameter is slightly reduced toward the rear, and is provided with a tubular rib 24a inside. In the knock cap 24, the tubular rib 24a has the rib 2
It is fitted to the inner peripheral wall of the cover portion 15 and is locked by a projection 25 provided on the inner peripheral wall of the cover portion 15, and slides on the inner peripheral wall of the cover portion 15 during a knocking operation.

Next, a third embodiment will be described. As shown in FIG. 5, the knock portion 27 of the tail plug 26 of the third embodiment has a thin wall 22 and a pair of front and rear ribs 23 of the second embodiment.
The portions corresponding to a and 23b are constituted by an elastic body 28 which is a separate component from the tail plug body. The elastic body 28 includes a pair of front and rear ribs 29a and 29b and an annular thin wall 30. The elastic body 28 is made of, for example, a rubber material such as an elastomer, and is integrally molded with the main body of the tail plug 26 made of polypropylene or the like by a two-color molding machine or the like. According to the third embodiment, since the thin wall 30 is provided on the elastic body 28, the operability of the knock portion 27 becomes good.

The first to third embodiments are preferred embodiments of the present invention, and the technical scope of the present invention is not limited to these embodiments. For example, in this embodiment, the first
As shown in the embodiment, the thin wall 14 is composed of a stepped portion having a large diameter portion 14a and a small diameter portion 14b, or the thin wall is constituted by the annular thin wall 30 as in the third embodiment. The thin wall according to the present invention may be a conventional one in which the bellows shaft portion is thinly formed, or one in which one or more annular grooves are formed in the cylindrical portion.

[0030]

As described above, according to the present invention, in a liquid applicator such as a writing implement or a cosmetic implement, the pressing force of the knock portion can be set low in accordance with normal use. Moreover, there is an effect that the cap can be attached and detached without any care, and the usability is improved. Further, the knocking operation can be easily performed while maintaining the malfunction prevention function.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a state in which a tail plug and a cap according to a first embodiment are removed.

FIG. 2 is a vertical cross-sectional view showing a state in which a tail plug is mounted on the barrel according to the first embodiment.

FIG. 3 is an enlarged view of part A in FIG.

FIG. 4 is an enlarged vertical sectional view of a main part of the second embodiment.

FIG. 5 is an enlarged vertical sectional view of a main part of the third embodiment.

[Explanation of symbols]

 1 Shaft cylinder 12 Knock part 13 Tail plug 14 Thin wall 15 Cover part 17 Notch 20 Tail plug 21 Knock part 22 Thin wall 26 Tail plug 27 Knock part 30 Thin wall

Claims (3)

[Claims] 1. A liquid applicator, such as a writing implement and a cosmetic implement, having a shaft cylinder for storing the coating liquid therein, which is provided inside by knocking a knock portion provided at the tail end in the axial direction. The valve is opened to allow the coating liquid to flow out from the pen tip.In the rear end opening of the barrel, a tail plug having the knock portion is fitted, and the knock portion is A liquid applicator, such as a writing implement or a cosmetic implement, having a thin wall that is deformable so as to be restored during operation. 2. The writing instrument according to claim 1, wherein the tail plug is integrally formed with a cover part formed around the knock part to prevent malfunction of the knock part. Liquid applicator such as tools. 3. A liquid applicator such as a writing implement or a cosmetic implement according to claim 2, wherein the peripheral wall of the cover portion is provided with a notch which is opened rearward and into which a finger can be inserted.