JPH0452069Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention stores liquids such as writing implements such as brush pens or liquid cosmetics such as manicure directly in a tank, and introduces the liquid from the same place through a valve. The present invention relates to a type of liquid applicator that supplies liquid to a tip of a brush or a tip applicator such as a brush through a tube.

(Prior art) Conventionally, in this type of liquid applicator, as in Utility Model Registration Application No. 24150 of 1985, the rear end of the liquid introduction pipe is connected to a valve, and the liquid that has passed through the valve is introduced into the liquid applicator. Generally, a structure is adopted in which the liquid flows into the interior of the introducing tube through a hole drilled in the side surface of the tube and is supplied to the tip application member.

(Problems to be Solved by the Invention) However, the liquid applicator having the structure of the conventional example has the following problems. That is, it is necessary to make a hole in the side surface of the liquid introduction pipe and to form a connection part between the valve and the liquid introduction pipe, resulting in a complex mold structure and high cost. In addition, since the area of the hole drilled on the side of the liquid introduction pipe is small, air tends to be prevented from entering the liquid tank through the hole to replace the liquid, making the outflow of the liquid unstable. etc.

The purpose of the present invention is to solve these problems, namely, to simplify the mold structure for manufacturing and reduce costs, and also to provide a liquid coating system that ensures air displacement and stabilizes the outflow of liquid. The goal is to provide new ingredients.

(Means for Solving the Problems) In order to achieve the above object, the liquid applicator of the present invention includes a spring receiver having a cylinder section at the front end of the liquid tank, and a piston section that can freely slide on the cylinder section. A valve having a valve stem provided thereon is installed, a liquid introduction pipe having a cylindrical part with a liquid flow hole inside is arranged in front of the valve, and a tip application having a tip shaft extending further forward of the liquid introduction pipe. The liquid distribution hole of the liquid introduction tube and the inner hole of the tip shaft opening to the outside are communicated with each other via an air groove formed on the inner surface of the tip shaft to form an air flow passage. Due to the relative retraction of the valve stem piston part with respect to the cylinder part, air is sucked into the space in front of the valve stem in the cylinder part through the air flow passage, and the piston part separates from the cylinder part, thereby separating the liquid tank and the valve stem. In a liquid applicator, the liquid flowing from the liquid tank into the cylinder part replaces the above-mentioned inhaled air and supplies the liquid flowing into the cylinder part from the liquid tank to the application member at all ends through the liquid distribution hole of the liquid introduction pipe in a state where the front space of the liquid inlet pipe is conductive. , a cylinder in which the rear end of the cylindrical part of the liquid introduction pipe and the valve stem are separated, the rear end of the cylindrical part is open, the front end is open, and slits in the axial direction are provided at predetermined positions on the circumference of the peripheral wall. A body is provided integrally protruding from the front end of the valve stem, and the front end opening edge of the cylindrical body and the rear end opening edge of the cylindrical part of the liquid introduction pipe come into contact with each other, so that the inside of the cylindrical body and the liquid circulation hole in the cylindrical part communicate with each other. The invention is characterized in that it is configured to do so.

(Example) An example of the liquid applicator of the present invention will be described in detail with reference to the drawings. This embodiment shows a brush pen. The shaft tube 1 has an open rear end surface, and a tail plug 3 is fitted into the fixing ring 2 fixed at the same place when not in use, as shown in Fig. 4 is screwed on. A cap 5 is fitted into the reduced diameter portion of the front end of the tip shaft 4 when not in use, as shown in FIG. A liquid introduction pipe 6 is fixed to the front end of the inner hole of the shaft cylinder 1 . The liquid introduction pipe 6 includes a cylindrical portion 6b having a liquid flow hole 6a opened from the front end surface to the rear end surface, a disk portion 6d having an annular groove 6c opening to the front surface on the outer periphery of the front end of the cylindrical portion 6b, and a disk portion. 6d has a protruding collar portion 6e on the outer peripheral portion of the front end thereof. This liquid introduction pipe 6
A plug 7 having a center hole 7a is abutted on the front surface of the plug. The plug 7 has a circumferential groove 7b and a cross-shaped groove 7c communicating with the circumferential groove 7b on the front surface, and a cylindrical portion 7b protruding from the rear surface to fit into the annular groove 6c on the front surface of the liquid introduction tube disk portion. The liquid introduction pipe 6 and the stopper 7 are in a combined state,
The flange 6e of the liquid introduction tube 6 and the peripheral edge of the stopper 7 are simultaneously clamped and fixed by the front edge of the shaft tube 1 and the inner surface step 4a of the tip shaft 4. Stopper 7
A welded and hardened circular portion 8a at the rear end of a tip-like tip applicator 8 in which fibers are bundled is brought into contact with the front surface of the tip applicator 8.
It is fixed by being sandwiched between the inner surface stepped portions 4b. The tip application member 8 of course passes through the inner hole 4c of the tip shaft 4 and projects its tip portion to the outside, and an axial air groove 4d is formed on the inner surface of the inner hole 4c. Next, inside the shaft cylinder 1, a combination of a liquid tank 9 and a fixed shaft 10, in which a valve device is mounted, is housed. The liquid tank 9 has a recess 9a on the rear end surface.
The threaded portion formed on the front end reduced diameter portion is screwed to the threaded portion formed on the inner surface of the inner hole opening at the rear end surface of the fixed shaft 10, and the front end edge of the liquid tank 9 and the inner surface of the fixed shaft 10 are screwed together. The respective flanges 11 are protruded from the outer periphery of the valve seat 11 and the spring receiver 12 by the stepped portions 10a.
a and 12a are sandwiched and fixed. Spring receiver 12
has a cylindrical portion 12b at the front end into which the valve seat 11 is fitted, and a cylinder portion 12c at the rear thereof, and connecting rod portions 12d extending rearward at positions spaced apart every 120° on the circumference. The guide cylinder part 12 is located at the rearmost end.
It has e. Inside the spring receiver 12, there is a large-diameter piston part 13a at the front end whose outer peripheral surface slides on the inner surface of the cylinder part 12c, and behind it a small-diameter shaft part 13b whose rear end passes through the guide cylinder part 12e. The valve stem 13 is inserted, and the valve spring 14 is wound around the outer periphery of the small diameter shaft portion 13b and is interposed between the rear surface of the large diameter piston portion 13a and the front surface of the guide cylinder portion 12e. The large-diameter piston portion 13a is pushed forward by the large-diameter piston portion 13a so that the tapered surface 13c on the front surface thereof is seated on the valve seat 11. On the other hand, the fixed shaft 10 has a center hole 10b that communicates with the inner hole of the valve seat 11, and has a groove 10c in the front position of the front end surface of the valve seat 11 on the inner surface thereof, into which a ring-shaped packing 15 is fitted. It is worn. The cylindrical portion 6b of the liquid introduction tube 6 is inserted into the center hole 10b of the fixed shaft 10, and a packing 15 is in contact with the outer surface of the cylindrical portion 6b in a watertight and slidable manner. The rear end of the cylindrical portion 6b of the liquid introduction pipe 6 faces the front surface of the valve stem 13 inside the valve seat 11;
A body 16 having the same diameter as b and having an open front face and having slits 16a having a required width in the axial direction extending from the front edge to the front face of the piston portion 13a is integrally provided at two opposing upper and lower locations on the peripheral wall. . When the valve stem 13 is seated on the valve seat 11, the liquid introduction pipe cylinder portion 6
There is some distance between the rear end of b and the front end of the cylindrical body 16. In addition, 17 in the figure is a ball for stirring the ink.

The operation of the brush pen is as follows. First, the tail plug 3 is removed from the fixing ring 2 at the rear end of the barrel 1.
Next, the cap 5 is removed from the front shaft 4 and inserted into the rear end opening of the shaft cylinder 1 as shown in FIG. 2, and its tip is fitted into the rear end recess 9a of the liquid tank. When the cap 5 is knocked in this state, the liquid tank 9 moves forward together with the fixed shaft 10 and the internal valve device. At this time, the valve stem 13 is pushed by the valve spring 14 and moves forward until the cylinder body 6 collides with the rear end of the liquid introduction pipe cylinder part 6b, but after that, the valve stem 13 is prevented from moving forward and is hit by the valve seat 11 and the spring receiver 12. On the other hand, the valve spring 14 is relatively moved back while being compressed. The second valve stem 13 is seated on the valve seat 11.
At the stage from the state shown in the figure to the state shown in FIG. 3, just before the piston part 13a of the valve stem 13 leaves the cylinder part 12c of the spring receiver 12, the space in front of the valve stem 13 expands and the pressure decreases. Air groove 4 on shaft 4
d, circumferential groove 7b of plug 7, cross groove 7c, center hole 7a,
Furthermore, air is sucked in through the liquid flow hole 6a of the liquid introduction pipe 6. Furthermore, the piston portion 13a of the valve stem 13
When the liquid leaves the cylinder portion 12c and reaches the state shown in FIG. 4, air enters the inside of the liquid tank 9 and replaces it, causing the ink inside the liquid tank 9 to flow into the inside of the cylinder portion 12c. When the knocking force is released in this state, the above-mentioned reverse process is carried out depending on the restoring force of the valve spring 14, and the state shown in FIG. 4 changes from the state shown in FIG.
The state shifts to the state shown in FIG. Then, at the stage of transition from the state shown in FIG. 3 to the state shown in FIG.
The ink inside is forced out into the liquid communication hole 6a of the liquid introduction pipe 6 by the piston portion 13a.

(Operations and effects of the invention) The invention of the present application has the above-described configuration, and when air enters the liquid tank from the liquid introduction pipe and replaces it, liquid is sent into the liquid introduction pipe. The air and liquid will pass through a slit in the cylindrical body protruding from the front of the valve stem, but the slit is a liquid introduction pipe that is installed to perform the same function in conventional liquid applicators. Since the area is extremely large compared to the hole bored in the side surface of the hole, passage of air and liquid is activated, and the liquid supply to the tip application member is improved. In addition, there is no need to drill a hole in the liquid introduction pipe, and there is no need to construct a connecting part between the valve stem and the liquid introduction pipe, which has the advantage of simplifying the mold structure and reducing costs. is completely achieved.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and Figures 1 to 4 are longitudinal cross-sectional views of the entire brush pen, Figure 1 is a diagram of the cap fitted state, and Figure 2 is a diagram of the state before and after the start of the knob operation. Figure 3 is a state diagram after the completion of the knock operation, just before the piston part is inserted into the cylinder part or just before the piston part is pulled out from the cylinder part, and Figure 4 shows only the pushing process of the knock operation. Figure 2 is a completed state diagram. FIG. 5 is a perspective view of a valve stem with a protruding cylindrical body. 1...Shaft cylinder, 2...Fixing ring, 3...Tail plug,
4... Tip shaft, 4a, 4b... Inner stepped portion, 4c...
Inner hole, 4d...Air groove, 5...Cap, 6...
Liquid introduction pipe, 6a...Liquid distribution hole, 6b...Cylinder part, 6c...Annular groove, 6d...Disc part, 6e...
Flange portion, 7...Plug, 7a...Center hole, 7b...Peripheral groove, 7c...Cross-shaped groove, 7d...Cylinder part, 8...Tip application member, 8a...Disc part, 9... Liquid tank, 9a... recess, 10... fixed shaft, 10a...
Inner surface step, 10b...center hole, 10c...groove, 1
1... Valve seat, 11a... Flange, 12... Spring holder,
12a... flange part, 12b... tube part, 12c... cylinder part, 12d... connecting rod part, 12e... guide cylinder part, 13... valve stem, 13a... piston part,
13b...Small diameter shaft portion, 13c...Tapered surface, 14
...Valve spring, 15...Packskin, 16...Cylinder body,
16a... Slit, 17... Stirring ball.

Claims (1)

[Scope of utility model registration request] A valve is attached to the front end of the liquid tank, which has a spring receiver with a cylinder part and a valve stem with a piston part that can slide freely over the cylinder part, and a cylindrical part with a liquid circulation hole inside is installed in front of the valve. A liquid introduction tube is disposed, and a distal application member that extends through the tip shaft is disposed further forward of the liquid introduction tube, and the liquid distribution hole of the liquid introduction tube and the inner hole of the tip tip opening to the outside are connected to the tip shaft. communicates with each other via an air groove or the like formed on the inner surface of the valve body to form an air flow path, and the air flows into the space in front of the valve stem in the cylinder portion by the relative retraction of the valve stem piston portion with respect to the cylinder portion of the spring receiver. Air is sucked in through the flow path, and when the piston part is separated from the cylinder part and the space in front of the liquid tank and the valve stem are in communication, liquid flows into the cylinder part from the liquid tank to replace the above-mentioned sucked air. In a liquid applicator configured to supply liquid to a tip application member through a liquid distribution hole of a liquid introduction pipe, the rear end of a cylindrical part of the liquid introduction pipe and a valve stem are separated from each other, and the rear end of the cylindrical part is opened. A cylindrical body with an open front end and axial slits provided at predetermined locations on the circumference of the peripheral wall is integrally provided on the front end of the valve stem, and the front end opening edge of the cylindrical body and the liquid introduction pipe are connected to each other. A liquid applicator characterized in that the rear opening edge of the cylindrical portion is in contact with the cylindrical portion so that the inside of the cylindrical body communicates with a liquid circulation hole in the cylindrical portion.