JP4471416B2 - Knock-type applicator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a knock type applicator incorporating a writing liquid such as a black ink, a paint, an ink, a cosmetic liquid such as an eyeliner or a lip color, a coating liquid such as a handwriting correction liquid, or an adhesive.
[0002]
[Prior art]
Conventionally, a coating body such as a pen tip is fixed to a tip opening of a shaft cylinder in which a coating liquid container is formed, and a valve mechanism is disposed between the coating body and the coating liquid container, and the front of the valve mechanism There is known a knock type applicator in which the front end side in the shaft cylinder is a small diameter part and the rear end side is a large diameter part, and the small diameter part is used as a coating liquid storage part.
[0003]
[Problems to be solved by the invention]
In the applicator as described above, the application liquid is discharged from the application liquid storage part to the large diameter part through a valve mechanism opened by knocking. The discharged coating liquid moves through the large-diameter portion, reaches the small-diameter portion, is temporarily stored in the gap between the small-diameter portion inner wall and the coated body, and then is ejected from the coated body. At this time, since the coating liquid reaches the small-diameter portion with the momentum discharged from the coating-liquid storage portion, when the coating liquid is discharged from the coating-liquid storage portion vigorously, the coating liquid is formed between the inner wall of the small-diameter portion and the coating body. Since it can not be held in the gap and falls down, or when moving from the large diameter part to the small diameter part, it forms a coating liquid layer and pushes out the air in the small diameter part, so bubbles are generated at the opening of the tip of the shaft tube, etc. Problems arise. It is an object of the present invention to provide a knock type applicator that does not cause the coating liquid to drop or foam even if the coating liquid is vigorously supplied to the front of the valve mechanism due to a change in the internal pressure of the coating liquid storage portion or the like. And
[0004]
[Means for Solving the Problems]
In the present invention, a coating body is disposed at a tip opening portion of a shaft cylinder in which a coating liquid storage portion is formed, and a valve mechanism is disposed between the coating body and the coating liquid storage portion. In the knock type applicator in which the front end side in the cylinder is the small diameter part and the rear end side is the large diameter part, and the small diameter part and the large diameter part are the application liquid storage part, the small diameter part is provided on the inner wall of the large diameter part. Rutotomoni ribs extending barrel longitudinally rearward from the relay unit of the large diameter portion, also a rib at the small diameter portion, also larger than the small diameter portion of the inscribed circle of the large-diameter portion rib In addition, the gist is a knock type applicator characterized in that the rib of the large diameter portion and the rib of the small diameter portion are discontinuous .
[0005]
[Action]
In the knock type applicator according to the present invention, when the knock member is pressed, the valve body is advanced to open the valve mechanism and is supplied to the large-diameter coating liquid reservoir. The supplied coating liquid moves forward through between the ribs formed on the inner wall of the large diameter portion, and reaches the relay portion between the large diameter portion and the small diameter portion. At this time, since the coating liquid is held by the capillary force generated between the ribs and is prevented from moving by the relay portion between the large diameter portion and the small diameter portion, it is stored in the large diameter portion. Furthermore, when the amount of the coating liquid discharged from the coating liquid storage part exceeds the holding force of the gap between the ribs, the coating liquid moves to the small diameter part side, and temporarily passes through the gap between the small diameter part inner wall and the application body. And then discharged from the coated body. At this time, since the coating liquid is once stored in the large diameter portion, the moving speed to the small diameter portion is slower than when the large diameter portion has no rib. Even when the coating solution is ejected vigorously from the coating solution container, the coating solution is once stored in the large diameter portion, so the speed at which the coating solution moves from the large diameter portion to the small diameter portion is There is no difference compared to the case where the liquid is slowly discharged from the coating liquid container. Thus, since the knock type applicator according to the present invention has a low speed of the coating liquid that moves to the coating liquid reservoir of the small diameter portion, the dropping of the coating liquid and the generation of bubbles are suppressed.
[0006]
【Example】
1 and 2 are reference diagrams showing the prior art. FIG. 1 is a longitudinal sectional view of the reference example when not knocking, and FIG. 2 is an enlarged longitudinal sectional view of a main part of the reference example when knocking. Reference numeral 1 denotes a rear shaft in which the coating liquid storage portion 2 is formed. The front shaft 3 having a small diameter at the front (upward direction in FIG. 1) and a large diameter at the rear, and having a flange 3a on the outer wall of the large diameter, It is inserted and fixed to a position where it abuts against the tip end surface of the rear shaft 1.
[0007]
In the front shaft 3, a through hole is formed in which a small-diameter portion 3b on the front side and a large-diameter portion 3c on the rear side are connected via a step portion 3d serving as a relay portion. A plurality of ribs 4 are formed on the inner wall of the large-diameter portion 3c from the step portion 3d to the rear in the axial longitudinal direction.
[0008]
A valve mechanism is disposed between the front shaft 3 and the coating liquid storage unit 2. This valve mechanism forms a lid 5 that forms a seat portion 5a and a valve portion 6a that is urged rearward by a later-described resilient member to resiliently contact the seat portion 5a. It consists of a valve body 6.
[0009]
The lid body 5 is composed of a front small-diameter cylindrical portion 5b and a rear large-diameter cylindrical portion 5c, and an inner wall of the small-diameter cylindrical portion 5b is formed with a circumferential projection 5d directed inward. The seat portion 5a is formed on the front end surface of the circumferential projection 5d. The lid 5 has a small-diameter cylindrical portion 5 b that is press-fitted into the inner wall of the large-diameter portion 3 c of the front shaft 3, and the large-diameter cylindrical portion 5 c that is press-fitted into the inner wall of the rear shaft 1. It is a lid of the coating liquid container 2.
[0010]
The valve body 6 is comprised from the front cylindrical part 6b, the intermediate | middle valve part 6a, and the back rod-shaped part 6c. The front cylindrical portion 6b and the valve portion 6a of the valve body 6 are slidably disposed in the small-diameter cylindrical portion 5b of the lid body 5, and the valve body 6 is formed of a resilient spring such as a coil spring. The member 7 is biased backward.
[0011]
In front of the valve body 6, a tubular brush fixing tube 8 composed of a large diameter hole portion 8 a and a small diameter hole portion 8 b is slidable with the small diameter hole portion 8 b in the front shaft 3. Has been placed. The stylus fixing tube 8 is connected to the valve body 6 in such a manner that the front cylindrical portion 6b of the valve body 6 is press-fitted inside the large-diameter portion 8a. However, the connection between the valve body 6 and the brush head fixing tube 8 is not limited to the press-fitting as described above, and can be performed by other appropriate means such as screwing, fitting, and adhesion.
[0012]
Inside the brush fixing tube 8, natural fibers such as rabbits, horses and pigs, synthetic resin fibers such as nylon, polyethylene terephthalate and acrylic fibers, or the natural brushes and synthetic resin brushes are mixed. A straight portion 9b is formed by converging a large number of fibers such as slabs in the longitudinal direction and fixing one end surface by a method such as heat welding or bonding to form a flange portion 9a. A brush head 9 provided with a tapered portion 9c that becomes thinner is arranged with the non-fixed end face in front.
[0013]
The brush head 9 has a front portion protruding from the front end opening portion of the front shaft 3, and a collar portion 9 a at the rear end portion of the boundary between the large diameter hole portion 8 a and the small diameter hole portion 8 b of the brush fixing tube 8. It abuts on the portion 8c and is fixed by being pinched between the step portion 8c and the front end surface of the valve body 6.
[0014]
The back rod-like portion 6 c of the valve body 6 is inserted and fixed to the front portion of the cylindrical member 10 disposed in the coating liquid storage portion 2 provided in the rear shaft 1. The tubular member 10 penetrates the tubular portion 2a into a bellows-shaped movable member 11 whose rear portion is inserted and fixed to the outside of the tubular portion 2a formed at the rear end of the coating liquid storage portion 2. Inserting. The bellows-like movable member 11 is covered with a knock crown 12 to constitute a knock portion. However, the knock portion can adopt a conventionally known method, and is not limited to the structure shown in the embodiment.
[0015]
Next, an operation when the knock type applicator of the reference example is used will be described. When the rear end portion of the knock member is pressed, the bellows-like movable portion contracts and the cylindrical member moves forward. As the tubular member moves, the valve body moves forward against the resilient force of the resilient member, and the valve mechanism is opened. When the valve mechanism is opened, the coating liquid in the coating liquid storage part is discharged into the coating liquid storage part of the large diameter part, and between the ribs formed on the inner wall of the large diameter part, the large diameter part and It moves forward until it hits a step which is a relay part with the small diameter part. At this time, since a coating liquid retention force due to capillary action acts between the ribs, the coating liquid is temporarily stored in the large diameter portion and then moves to the small diameter portion. Next, when the amount of the coating liquid discharged from the coating liquid storage part exceeds the coating liquid holding force between the ribs, the coating liquid is relayed between the large diameter part and the small diameter part of the coating liquid storage part. And then reaches the coating liquid storage part of the small diameter part and is stored in the gap between the small diameter part and the application body, and then penetrates the application body and is discharged onto the paper surface. Here, even when the speed at which the coating liquid is discharged from the coating liquid storage section is increased due to a temperature difference or an atmospheric pressure difference between the coating liquid storage section and the outside, the coating liquid is stored in the large-diameter coating liquid storage section. Therefore, the moving speed from the large diameter portion to the small diameter portion is slow. Therefore, the dropping of the coating liquid and the generation of bubbles are suppressed.
[0016]
Example 1 is shown in FIG. In the above reference, Example 1 is the same as Example 1 except that the inner wall of the small-diameter portion 103b of the front shaft 103 is provided with a longitudinal rib 104 extending over the entire length of the small-diameter portion 103b. The knock type applicator according to Example 2 has a coating liquid holding force in the gap between the inner wall of the small diameter portion and the application body due to the capillary action generated between the ribs provided in the small diameter portion compared to the reference example. Therefore, the effect that the coating liquid does not easily fall off is obtained.
[0017]
Example 2 is shown in FIG. Example 2 uses a fiber convergence body such as acrylic fiber, polyester fiber, nylon fiber, and rayon fiber, and a molded body such as urethane resin, polyester resin, and ceramic as the application body 209 in Example 1 above . It is the same as in Example 1 except that the rib 204 formed on the inner wall of the small diameter portion 203b is fixed in a press-fitted state and the rear end portion of the application body 209 is inserted up to the large diameter portion 203c of the application liquid storage portion. The second embodiment has the following effects compared to the first embodiment . Since the rear end of the application body is inserted to the large diameter part of the application liquid storage part, the application liquid penetrates the application body not only from the small diameter part of the application liquid storage part but also from the large diameter part of the application liquid storage part. Therefore, the coating can be performed in a shorter time than the reference example .
[0018]
【The invention's effect】
Since the knock-type applicator according to the present invention has the above-described configuration, it is difficult to generate bubbles from the gap between the applicator and the tip end of the shaft tube or to drop off the coating liquid during use. In this case, it is extremely useful.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a reference example .
FIG. 2 is an enlarged vertical sectional view of a main part of a reference example .
FIG. 3 is an enlarged vertical sectional view of a main part of the first embodiment .
4 is an enlarged vertical cross-sectional view of a main part of Example 2. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rear axis | shaft 2 Coating liquid storage chamber 3 Front axis | shaft 3a collar part 3b small diameter part 3c large diameter part 3d step part (relay part)
4 Rib 104 Rib 204 Rib 5 Lid 5a Seat 6 Valve 6a Valve

Claims (1)

A coating body is disposed at the tip opening of the shaft cylinder in which the coating liquid storage portion is formed, and a valve mechanism is disposed between the coating body and the coating liquid storage section, and the tip in the shaft cylinder in front of the valve mechanism. In the knock type applicator having a small diameter portion on the side and a large diameter portion on the rear end side, and the small diameter portion and the large diameter portion serving as a coating liquid reservoir, the small diameter portion and the large diameter portion are provided on the inner wall of the large diameter portion. Rutotomoni ribs extending barrel longitudinally rearward from the relay unit, and also a rib at the small diameter portion, also an inscribed circle of the large-diameter portion ribs with larger than the small-diameter portion, a large diameter A knock-type applicator characterized in that the rib of the portion and the rib of the small diameter portion are discontinuous .

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