JPH0852407A - Applicator - Google Patents

Abstract

(57) [Abstract] [Purpose] The tip of the pressing means surely presses the ball,
(EN) Provided is an applicator in which a fluid does not leak without forming a gap between an inner edge of a caulking portion and a ball when the applicator is not used. [Structure] Rear surface 14a1 of the back wall 14a of the ball seat
Is formed on a surface along a conical side surface that opens toward the rear, and the apex angle α of the conical shape is 100 ° or less, for example, 60 °.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid applicator, and more specifically, it contains a fluid such as a correction fluid, an aqueous / oil-based ink, or a cosmetic material as a coating fluid to be coated on a paper surface. The present invention relates to an applicator for applying to the body.

[0002]

2. Description of the Related Art An applicator is a device for applying (applying) a fluid such as a correction fluid onto the surface of a paper sheet.
-76568 and Japanese Utility Model Laid-Open No. 5-58362. FIG. 7 shows an example 1 of such a conventional applicator. A small ball 2 is attached to the tip of the applicator 1, and if a target portion on a coated surface 3 such as a paper surface is traced by using a ballpoint pen,
With the rotation of the ball 2, the fluid 6 in the shaft body 12 is pulled out and applied to the target portion.

The ball 2 is rotatably supported so as to be held by a holder 8 provided at the tip of the applicator. A combination of the ball 2 and the holder 8 is called a so-called chip, and this chip 10 is connected to a shaft main body 12 that houses the fluid 6 via an appropriate connecting member (a mouth plastic or the like) 13. The holder 8 is fitted into the substantially cylindrical connecting member 13 with its rear end abutting the insert 13a having an axial through hole formed in the central portion thereof. The position of the rear end is regulated.

FIG. 7 clearly shows the positional relationship between the ball 2 and the holder 8. The ball 2 is accommodated in a ball seat 14 which receives the ball 2 so as to wrap the ball 2 in a loose state (a clearance 15 is provided between the ball 2 and the ball seat 14 for the fluid 6 to flow). Further, the tip of the ball seat 14 is an opening portion called a caulking portion having a diameter slightly smaller than half the diameter of the ball 2, and a part of the ball 2 is inserted through the caulking portion 16. 2a
Is exposed to the outside. In addition, ball seat 1
4, a wall portion 14a on the shaft body 12 side is provided with a fluid guide hole 18 having a diameter slightly larger than half the diameter of the ball. A push rod 20 is interposed as a pushing means for pushing to the 16 side. A spring 2 is provided on the shaft body 12 side of the push rod 20.
1, the spring 21 exerts a pressing force on the push rod 20, and the tip end surface of the push rod 20 contacts the rear end of the ball 2 to push the ball 2 forward. The caulking portion 16, the ball 2, the fluid guide hole 18, and the push rod 20 are arranged on the same axis.

When the applicator 1 is not used, the pressing force of the push rod 20 leaves the ball 2 in a protruding state from the caulking portion 16 as shown in FIG. When the tool 1 is used, the ball 2 and the push rod 20 are displaced toward the shaft body 12 side as shown in the figure by the force of the user of the applicator 1 pushing the applicator 1 toward the paper surface 3, and the ball 2 The amount of protrusion from the caulked portion 16 is about one fifth of the ball, and at the same time, the fluid guide hole 18 seems to be blocked by the ball 2. However, even if the caulking portion 16 is blocked by the ball 2 in this way, the ball 2 is set so as to be freely rotatable on the surface 3 to be coated. Along with this, the fluid 6 in the shaft body 12 is pulled out.

The reference numerals in the figure denote vertical grooves 22 that are radially provided around the fluid guide hole 18 and are appropriately separated from each other.
22 for introducing the fluid 6 from the shaft body 12 in addition to the fluid guide hole 18. Further, on the rear side of the wall portion 14a of the holder 8, there is provided a spring accommodating chamber 21a for accommodating the spring 21 in which the fluid flows.
The fluid flows into a through the hollow portion of the connecting member 13 and the hollow portion of the insert 13a from the inside of the shaft body 12.

[0007]

In the conventional applicator described above, when assembling the applicator, the ball 2 is inserted into the holder 8 and the caulking portion 16 is caulked, and then the wall portion 14a of the ball seat 14 (shaft main body). The spring 21 and the push rod 20 are mounted in the holder 8 on the rear side of the 12 side wall portion 14a). However, at the time of mounting, the spring 21, the push rod 20, etc. are caught on the rear side portion of the wall portion, and the push rod 20 is not inserted into the fluid guide hole or has sufficient elastic force. In some cases, the push rod 20 may not urge the ball 2 forward. In such a case, the ball 2 cannot completely adhere to the inner peripheral edge of the caulking portion 16 of the ball seat 14, and a gap is created between the ball 2 and the caulking portion 16, and this gap causes The problem arises that fluid may leak.

The present invention has been made in view of the above-mentioned conventional problems, and the pressing means surely presses the ball so that a gap is formed between the inner edge of the caulking portion and the ball when the applicator is not used. It is an object of the present invention to provide an applicator in which the fluid does not leak without the occurrence of the above.

[0009]

The present invention solves the above problems and has the following configuration. That is, according to the invention of claim 1, the holder rear end is fixed to the open front end of the shaft main body for containing the fluid, and the fluid is directed from the front end of the shaft main body to the front end of the holder through the inside of the holder. An applicator for applying a fluid from the tip of the holder to the target surface of the object to be coated by flowing the ball, wherein the holder draws the fluid in the shaft body onto the target surface of the object to be coated, A ball seat for rotatably enclosing the ball, and a rear side wall of the ball seat for exposing a part of the ball to the outside through a caulking portion formed at the tip of the ball seat. In the applicator having a pressing means for pushing the ball toward the caulking portion side through the fluid guide hole, the rear surface of the ball seat rear side wall portion is formed on a surface along a conical side surface that opens toward the rear. And after that It has a pore portion of the cylindrical and intersects the step portion, and,
The applicator is characterized in that the cone has an apex angle of 100 ° or less.

According to a second aspect of the present invention, the fluid guide hole is provided with a groove portion which is recessed in a radial direction from an inner peripheral surface thereof.
The applicator according to claim 1, wherein the applicator is formed along the fluid guide hole and except at least in the vicinity of the rear surface of the rear side wall portion.

The invention according to claim 3 is the applicator according to claim 1 or 2, characterized in that the shaft main body is a coating liquid tank having high flexibility.

[0012]

According to the first aspect of the present invention, the rear surface of the side wall portion of the rear wall of the ball seat is formed into a surface (that is, a mortar-like slope) along a conical side surface that opens toward the rear, and thereafter, it is substantially formed. Since the conical shape has a step portion that intersects with the cylindrical hole portion and the apex angle of the conical shape is 100 ° or less, when the applicator is assembled, a pressing means (for example, a pressing means) inserted from the rear end portion of the holder. Even if the front end of the rod or the spring comes into contact with the rear surface of the rear side wall of the ball seat, the weight of the pressing means or the pressing means when assembling the rear member of the holder Due to the generated forward pressing force, the front end portion of the pressing means slides on the mortar-shaped rear surface of the wall portion toward the central portion, and enters the fluid guide hole without being caught. The tip of the pressing means passes through the fluid guide hole and enters the ball seat,
Firmly press the ball. Therefore, when the applicator is not used, the balls are in close contact with the inner edge of the ball seat to be watertight, and no gap is created, so that the fluid does not leak. In addition, in Claim 1, the apex angle of the conical shape along the inner circumferential surface of the fluid guide hole is set to an angle of 100 ° or less, and preferably the apex angle is set to 70 ° or less. it can. Moreover, the minimum angle of the apex is not particularly set. Further, in the present invention, there is a step portion that intersects with a substantially cylindrical hole from the rear end portion of the holder and the conical side surface of the side wall portion behind the ball seat. Such a shape is easy to process. For example, if the rear part of the holder is cut with a drill and the angle of the tip of the drill is set to 60 ° in the final step, the apex angle of the conical shape is also 60.
It becomes °. If the apex angle is set to 100 ° or less, the angle of the cross section of the stepped portion becomes 100 ° or more, and the tip of the elastic body such as the push rod or the spring slips off without being caught in this portion. It should be noted that it would be better to eliminate this step and to have a continuous surface without a step where the side surface of the cone concerned and the substantially cylindrical hole portion from the rear end of the holder intersect, but if the holder is metal. Since the cutting process becomes complicated, the resistance received during cutting with a drill or the like increases, the damage of the drill or the like occurs, and the roughness of the cutting surface rather causes the inconvenience of catching a push rod or the like. As described above, it is preferable that the rear end portion of the holder has a substantially cylindrical hole and the stepped portion intersects with the conical side surface of the side wall portion of the rear wall of the ball seat.

According to the second aspect of the present invention, in the fluid guide hole, a groove recessed in a radial direction from the inner peripheral surface of the fluid guide hole extends along the fluid guide hole, and at least the rear side wall portion. Since it is formed excluding the vicinity of the rear surface, the front end portion of the pressing means inserted from the rear end portion of the holder does not fit into and are caught in the groove portion when the applicator is assembled. Further, even if the outer diameter of the tip of the pressing means is smaller than the width of the groove, the tip does not fit into the groove and get caught.

Further, according to the invention of claim 3, since the shaft body is a coating liquid tank having a high flexibility, the pressure in the shaft body is increased by pressing the shaft body, so that the fluid Can be fed into the ball seat through the fluid guide hole in the holder. Therefore, the fluid can be smoothly delivered from the tip of the holder.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. The parts of the applicator 1A shown in this embodiment that are the same as those of the applicator 1 in the above-described conventional art are designated by the same reference numerals and the description thereof is omitted. FIG. 1 is a sectional view of the entire structure of the fluid applicator according to the first embodiment, FIG. 2 and FIG.
Shows a sectional view of an essential part of the holder.

As shown in FIGS. 1 and 2, in the applicator of the first embodiment, the rear end portion of the holder 8a has a mouth plug 26 at the open front end portion of the shaft body 12 which is a fluid storage tank. The fluid is flowed from the tip of the shaft body 12 toward the tip of the holder 8a through the inside of the holder 8a, so that the fluid flows from the tip of the holder 8a to the target surface of the coated object such as a paper surface. It is an applicator for applying the body 6.

The shaft body 12 can be a storage tank for a fluid made of a highly flexible resin. Also, the shaft body 1
A ball 9 for agitating the fluid is accommodated in 2. Further, the shaft body 12 has a substantially cylindrical shape with a closed rear end, and the front end portion 12a is formed such that the rear approximate half 12a1 is tapered and the front approximate half 1a is formed.
2a2 is formed in a cylindrical shape. The front half 12a2 of the tip portion 12a holds and fixes the mouth plastic 26.

An umbrella-shaped collar portion 26a is formed at the tip of the mouth plastic 26, and even if the mouth plastic 26 is pushed into the shaft body 12, the collar portion 26a abuts against the tip edge of the tip portion 12a. The above is designed so as not to go into the shaft body 12. Further, inside the mouth plastic 26, two steps 26b and 26c are formed whose inner diameter decreases toward the axial rear. When the rear portion of the holder 8a is fitted in the mouth plastic 26, the holder 8 is attached to the front step 26b.
The rear edge of a abuts on the rear edge of the holder 8a to regulate the rear edge thereof, and the rear step 26c locks the rear edge of the elastic body 28 described later.

The holder 8a is a ball 2 for drawing out the fluid 6 in the shaft body 12 onto the surface of the object to be coated.
And a ball seat 14 that rotatably encloses the ball 2.
And the caulking portion 1 formed at the tip of the ball seat 14
Pressing the ball 2 toward the caulking portion 16 side via a fluid guide hole 18 provided in the rear side wall portion 14a of the ball seat 14 in order to expose the part 2a of the ball 2 to the outside via 6 A push rod 27 and an elastic body 28 which are means
Have and.

The rear surface 14a of the ball seat rear side wall portion 14a
1 is formed on a surface along a conical side surface that opens toward the rear, and thereafter, the step portion 1 intersects with a substantially cylindrical hole portion 8l.
4a2, and the apex angle α of the cone is 60 °.

The fluid guide hole 18 has a substantially circular cross section, and a groove portion 29, which is an appropriate number of vertical grooves recessed from the inner peripheral surface thereof in the radial direction, is provided in the fluid guide hole 1.
8 is formed so as to penetrate from the front surface of the wall portion 14a to the rear surface 14a1.

The push rod 27 has a stepwise thin rear end and a large diameter portion 27a having a large diameter in the center. The elastic body 28 has its front end fitted onto the thin portion of the rear end of the push rod 27, and is engaged with the push rod 27 at the large-diameter portion 27a to push it forward. . Further, the tip end portion 27b of the push rod 27 is formed in a columnar shape having an outer diameter smaller than the inner diameter of the fluid guide hole 18 and a tip end surface being a flat surface.

According to the first embodiment, when the applicator is assembled, as shown in FIG. 3 (a), the push rod body 27 or the resilient body 28 which is a pressing means to be inserted from the rear end portion of the holder 8a. And the ball 2 are aligned on a straight line along the axis center c, and the tip end surface of the tip end portion 27b of the push rod 27 is the ball 2
Ideally, it should hit toward the center of the rear end face. However, even if the tip end portion 27b of the push rod 27 comes into contact with the rear surface 14a1 of the rear side wall portion 14a of the ball seat 14 as indicated by the broken line in FIG. Alternatively, the front end portion 27b of the push rod 27 is moved along the mortar-shaped rear surface 14a1 of the wall portion 14a by the forward pressing force generated by the pressing means when the mouth plastic 26 on the rear side of the holder 8 is assembled. Proceed toward the center (solid line). Therefore, the push rod 27 does not get caught on the rear surface 14a1 and the fluid guide hole 18 does not have to be caught.
Get in. Then, the tip end portion of the push rod 27 passes through the fluid guide hole 18 and enters the ball seat 14 to reliably press the ball 2. Therefore, when the applicator is not used, the ball 2 comes into close contact with the inner edge of the caulking portion 16 of the ball seat 14 to be watertight, and no gap is created, so that the fluid 6 does not leak.

Next, a second embodiment will be described. FIG. 4 mainly shows the holder 8b of the applicator according to the second embodiment. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted. As shown in FIG. 4, this second
In the embodiment, unlike the first embodiment, the pressing means does not have the push rod 27, but instead the tip portion 30a extends linearly along the axis of the holder 8b and its linear tip. The elastic body 30 is formed by connecting a part 30a with a part 30b which is bent in a string shape. This bullet 30
Has a configuration in which the tip portion 30a of a coil spring made of, for example, steel, stainless steel, or a resin molded product is linearly extended.

According to this second embodiment, the push rod 2
8 is not provided, the number of assembling parts is reduced and the work load of assembling can be reduced. In addition, the tip portion 3 of the projectile 30
0a has a fixed positional relationship from the beginning with respect to the bent portion 30b, and it is not necessary to position the elastic body 28 at the rear end of the push rod 27 as in the first embodiment. Therefore, the positional relationship can be made constant. Therefore, the positioning when the pressing means is put in the holder 8b and the insertion into the fluid guide hole 18 can be smoothly performed.

Next, a third embodiment will be described. FIG. 5 mainly shows the holder 8c of the applicator according to the third embodiment. The same parts as those in the first and second embodiments are designated by the same reference numerals and the description thereof will be omitted. The difference between the applicator of the third embodiment and the second embodiment is that the rear surface 14 of the wall portion 14a is different.
a1 is along a conical shape with an apex angle α of 70 °, and thereafter has a step portion 14a2 intersecting with a substantially cylindrical hole portion 8l, and has a fluid guide hole 18 from its inner peripheral surface. A groove portion 31 that is recessed in the radial direction is formed along the fluid guide hole 18 to a substantially central portion, and the wall portion 14a is formed.
It is formed except the vicinity of the rear surface 14a1.

According to the third embodiment, since the groove portion 31 does not penetrate through the front and rear, the tip portion 30a of the elastic body 30 comes into contact with the rear surface 14a1 of the wall portion 14a and enters the groove portion 31. Without, that is, without being caught in the groove 31, the tip portion 30a can be inserted into the fluid guide hole 18. Therefore, the tip portion 30a of the projectile is
Even if it is thin, it is not caught in the groove portion 31, and the degree of freedom in designing the diameter of the tip portion 30a is increased. When the diameter of the tip portion 30a is narrower than the width of the groove portion 31, the tip portion 3
There is no possibility that 0a will fit into the groove 31 and the assembly will be bad.

In the third embodiment, the groove 31 is
Was formed up to almost the central portion of the fluid guide hole 18, but in addition to this, at least the rear end face 14 of the rear side wall portion 14a is formed.
If the groove is formed except for the vicinity of a1, the groove 3
1 may have any configuration.

Next, a comparative example will be described. FIG. 6 is an explanatory view of the holder 8d of this comparative example, and the same parts as those in the first embodiment are designated by the same reference numerals. As shown in FIG. 6, in this comparative example, the rear surface 32a1 of the rear wall 32a of the ball seat 32 is formed on a surface along a conical side surface having an apex angle β of 120 °. . This ball seat 32 has the same structure as that of the ball seat 14 except for the rear surface 32a1 of the rear side wall part 32, and the other parts have the same structures as those of the first embodiment, and therefore the same numbers are given. The explanation is omitted.

In each of the above-mentioned first to third embodiments and the comparative example, when each of the resilient bodies 28 and 30 was incorporated in the holders 8a to 8d, the ball was caught on the rear end surface of the wall on the rear side of the ball seat. This is a survey of the number of states. In this investigation, the push rod body 27 and the elastic body 2 of the pressing means are
When 8 and 30 are incorporated in the holders 8a to 8d, the holders 8a to 8d are caught in the rear surface of the wall.
Since the inner peripheral surface of the caulking portion 16 of the tip end ball seat 14 of d and the ball 2 are not pushed so as to be watertight, the holder 8a when water is put into the shaft body 4 and lightly pressed It was judged by the presence or absence of liquid leakage from the tip of 8d.

First Example Second Example Third Example Comparative Example Assembly Number 100 100 100 100 Liquid Leakage Number 0 0 0 5

As described above, liquid leakage did not occur in the first to third embodiments, but liquid leakage occurred to some extent in the comparative example. It will be appreciated that this makes the present invention useful.

In the first to third embodiments, the applicator with the rear end surface of the wall having an apex angle of 70 ° or 60 ° is illustrated, but the present invention is not limited to this and the apex angle is 100 °. The apex angle other than these is not limited as long as it is a side surface along the following conical shape. Further, the smaller angle (lower limit angle) is not particularly set. In addition, the applicator of the present invention can be used not only for a correction pen that uses a correction fluid as a fluid but also for an applicator for fluid such as aqueous / oil-based ink cosmetics.

[0034]

As described above, according to the invention of claim 1, the pressing means reliably presses the ball, and when the applicator is not used, the ball is in close contact with the inner edge of the ball seat to be watertight. Since there is no gap, the fluid does not leak. Further, according to the invention of claim 2, the front end portion of the pressing means inserted from the rear end portion of the holder does not fit into and are caught in the groove portion when the applicator is assembled. Further, even if the outer diameter of the tip of the pressing means is smaller than the width of the groove, the tip does not fit into the groove and get caught.
According to the invention of claim 3, the fluid can be smoothly sent out from the tip of the holder.

[Brief description of drawings]

FIG. 1 is an overall sectional view of an applicator according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part of the applicator of FIG.

3 (a) and 3 (b) are explanatory views of the operation of the applicator of FIG.

FIG. 4 is a cross-sectional view of essential parts of a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of essential parts of a third embodiment of the present invention.

FIG. 6 is a cross-sectional view of a main part of a comparative example.

FIG. 7 is a cross-sectional view of a main part of an applicator for explaining a conventional technique.

[Explanation of symbols]

 2 ball 6 fluid 8a, 8b, 8c holder 12 shaft body 14 ball seat 14a ball seat rear side wall 14a1 wall rear surface 16 caulking portion 18 fluid guide hole 27 push rod 28, 30 resilient body 29 , 31 groove

Claims (3)

[Claims] 1. A holder rear end is fixed to an open front end of a shaft body for containing a fluid so that the fluid flows from the shaft body front end toward the holder front end through the inside of the holder. A coating tool for applying a fluid from a tip portion of a holder to a target surface of an object to be coated, wherein the holder draws the fluid in the shaft body onto the target surface of the object to be coated; A ball seat that rotatably encloses and a fluid provided on the rear side wall of the ball seat to expose a part of the ball to the outside through a caulking part formed at the tip of the ball seat. In an applicator having a pressing means for pushing the ball toward the caulking portion side via a guide hole, a rear surface of the ball seat rear side wall portion is formed on a surface along a conical side surface that opens toward the rear, and , The apex angle of the cone Applicator, characterized in that this is the 100 ° or less. 2. The fluid guide hole is formed with a groove recessed radially from the inner peripheral surface thereof along the fluid guide hole and except at least in the vicinity of the rear surface of the rear side wall portion. The applicator according to claim 1, wherein 3. The applicator according to claim 1, wherein the shaft body is a highly flexible coating liquid tank.