JP2010125601A - Liquid applicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid applicator which shows an amplified convenient usage by curtailing the number of components, and making it possible to fit an application member easily and keep the interior of a tip barrel airtight and further, curb a liquid spurt during drawing out the application liquid, as well as can realize the easy reaching of the liquid to the apex of the application member. <P>SOLUTION: This liquid applicator spurts the application liquid from a tank 30 to the application member 21 through a liquid introduction pipe 22. In this liquid applicator, a click 25 formed on the inner surface of the tip barrel 24 becomes elastically distorted to the outside in the diametral direction of the tip barrel 24 from the original position upon pressing of a collar 21a to the click 25, when the application member 21 is inserted into the opening of the tip barrel 24, starting with the rear end part side of the application member 21. Further, as the collar 21a is free from pressing the click 25, the rear end part of the click 25 which is now back to its original position, engages with the collar 21a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a tip or brush that bundles fibers or a coating member made of a porous body at the tip portion that discharges the coating liquid by knocking or rotating operation, and the discharged coating liquid is applied to the target site by the coating member. The present invention relates to a liquid applicator for applying various coating liquids such as liquid cosmetics such as writing inks, correction liquids, and Manicia liquids, liquid paints, liquid pharmaceuticals, and shoe ink liquids.

  In conventional liquid applicators, an application member such as a brush is fixed to the tip of the applicator main body with a mounting part, and a pipe-shaped liquid introduction pipe communicating with the application liquid storage section in the applicator main body is inserted into the application member. The base of the applicator member and the attachment parts are covered so that a substantially cylindrical front shaft is fixed to the tip of the applicator main body by fitting or screwing (for example, JP-A-7-275578). : Patent Document 1, Japanese Patent Laid-Open No. 8-228828: Patent Document 2).

  In this type of liquid applicator, the front shaft, which is the main external component, is made of a hard material such as PBT (polybutylene terephthalate) because of its appearance and chemical resistance. The part is composed of another part of material such as PE (polyethylene) which is easily elastically deformed.

  Further, in order to maintain the sealed state in the front shaft at the time of the cap, both the front shaft and the liquid introduction pipe for the coating liquid are composed of PBT or the like, and when the seal portion is in surface contact, it becomes difficult to maintain the sealed state, Parts such as PE for attaching brushstrokes are used as seal rings for maintaining a sealed state.

  Furthermore, in the case of a liquid applicator with a conventional knock type valve mechanism, the coating liquid may be ejected vigorously from the liquid introduction tube depending on the liquid ejection of the valve mechanism, and may be ejected without being held by the brush tip. there were.

  Therefore, the liquid discharge port of the liquid introduction tube is moved to the rear end side of the brush head, and even when the liquid is ejected vigorously, the ejection is prevented by increasing the distance to the tip of the brush head.

  However, in the liquid applicator having this structure, since the liquid discharge is at the rear end of the brush tip, it is very difficult to use in actual use in which application is performed at the tip of the brush tip.

Also, the liquid inlet tube has a narrow discharge port and is generally long, so it is often composed of separate parts such as metal parts, leading to an increase in cost.
JP-A-7-275782 JP-A-8-228828

  However, conventionally, the addition of separate parts to ensure the attachment of the brush head and the sealed state in the tip shaft complicates the assembly process and increases the cost.

  In addition, liquid ejection in a liquid applicator provided with a knock type valve mechanism is suppressed by letting the liquid introduction tube tip from the tip end of the front shaft to the rear end. Is difficult to reach and sacrifices usability.

  In addition, the liquid introduction pipe is often configured as a separate part, and the number of parts increases, leading to an increase in cost.

  The present invention provides a liquid applicator capable of reducing the number of parts, attaching an application member, and maintaining a sealed state in a front shaft, and further preventing liquid from being ejected by a knock type valve mechanism and applying to the tip of the application member It is an object of the present invention to provide a liquid applicator that is easy to reach by improving the usability.

  The present invention relates to a liquid applicator.

The invention provides a tank for containing a coating solution in the applicator main body, a tapered hollow cylindrical tip at the tip of the applicator main body, and an application member such as a brush tip is inserted into the tip And a liquid introduction pipe for guiding the application liquid in the tank to the application member is provided at the tip of the applicator main body, and the application in the tank is performed by knocking or rotating operation. In a liquid applicator for discharging liquid to the application member through the liquid introduction tube,
A collar is provided at the rear end of the application member,
The front shaft has a claw portion that is elastically deformable in the radial direction of the front shaft and is locked to the collar portion of the application member mounted from the opening of the front shaft to prevent the front shaft from coming off. Integrally formed on the inner peripheral surface of
When the claw part is pressed against the claw part when the application member is inserted into the front axis opening from the rear end side, the claw part elastically deforms from the original position to the front axis radial direction, The liquid applicator has a structure in which the rear end portion of the claw portion returned to the original position is locked and held by the hook portion when the hook portion stops being pressed. In addition, the original position of the nail | claw part is a state before a nail | claw part deform | transforms before an application member is inserted in a front-axis | shaft opening.

In the present invention, a seal portion capable of maintaining a sealed state inside the front shaft at the time of the cap is formed on each of the front shaft and the liquid introduction pipe,
The front shaft side seal portion is formed by projecting a corner portion having an R shape at the tip portion facing in the axial direction on the inner peripheral surface of the front shaft over the entire circumference,
The liquid inlet tube side seal portion which is the counterpart side is an outer peripheral surface of the flange portion formed on the outer peripheral surface of the liquid inlet tube, and includes a flange portion in which a contact surface with the corner portion is formed as a tapered surface,
A female screw is formed on the inner peripheral surface of the rear end of the front shaft, and a male screw is formed on the outer periphery of the tip of the applicator main body. When the front shaft is screwed into the front end of the applicator main body, It is preferable that the structure is configured to be pressed against the tapered surface of the flange portion and maintain a sealed state.

  Further, in the present invention, a pipe-like discharge port part for supplying a liquid to the application member is formed integrally with the liquid introduction pipe front end part, and the pipe-like discharge port part is inserted from the rear end of the application member, It is preferable that the tip of the pipe-shaped discharge port is provided with a slit structure that is cut backward.

  In the present invention, it is preferable that the liquid inlet pipe has a pipe-shaped discharge port portion disposed at substantially the same position as the front end portion of the front shaft.

  In the present invention, the pipe-like discharge port portion has an inner diameter smaller than that of the liquid introduction tube, and the inner peripheral portion of the tip portion of the liquid introduction tube continuous to the pipe-like discharge port portion is internally It is preferable to provide a rib for preventing volume increase.

  According to the liquid applicator according to claims 1 to 5 of the present invention, in the liquid applicator, the claw portion has a claw portion when the application member is inserted into the front shaft opening from the rear end side. The claw part is elastically deformed from the original position outward in the radial direction of the front axis when pressed against, and the rear end part of the claw part returned to the original position is locked and held by the collar part when the hook part stops being pressed. Because it has a structure, if the application member is inserted from the front shaft opening, the application member can be attached to the nail portion, so it is necessary to center the application member and the front shaft before attaching the front shaft to the applicator body Assembling workability is improved.

  In the present invention, the front shaft side seal portion is formed with a corner portion having an R-shaped tip portion facing in the axial direction protruding from the inner peripheral surface of the front shaft over the entire circumference, and the liquid introduction tube side that is the counterpart side The seal portion is an outer peripheral surface of the flange portion formed on the outer peripheral surface of the liquid introduction pipe, and is formed of a flange portion whose contact surface with the corner portion is formed on a tapered surface. If a screw is formed and a male screw is formed on the outer periphery of the tip of the applicator body, the corners press against the taper surface of the flange when the tip shaft is screwed into the tip of the applicator body. Therefore, the sealed state can be maintained, and the corner portion hits the tapered surface of the flange portion, so that the sealed state can be easily maintained.

  Therefore, a sealing member for holding an application member formed of a relatively soft material such as PE and maintaining a sealed state is not necessary, and an increase in cost can be prevented.

  Further, in the present invention, a pipe-like discharge port portion for supplying a liquid to the application member is integrally formed at the tip portion of the liquid introduction pipe, and the pipe-like discharge port portion is inserted from the rear end of the application member. By providing a slit structure that cuts backward at the tip of the pipe-shaped discharge port, it is possible to prevent liquid from being blown when the coating liquid is discharged by the slit. It can be arranged near the tip of the front shaft.

In addition, if the liquid inlet tube has a pipe-like discharge port portion disposed at substantially the same position in the front-and-rear direction as the front shaft tip portion, the application liquid can reach the application member through the liquid introduction tube. It will be short and easy to use.
Further, the pipe-shaped discharge port portion is formed with an inner diameter smaller than that of the liquid introduction tube, and a rib for preventing an increase in internal volume is formed on the inner peripheral portion of the liquid introduction tube tip portion continuous with the pipe-shaped discharge port portion. If it is provided, the pressure increase in the liquid introduction pipe is easily transmitted during discharge, and the time required for the coating liquid to reach the coating member through the liquid introduction pipe is further shortened and the usability is further improved.

  Therefore, according to the present invention, it is possible to provide excellent effects such as the provision of a liquid applicator that can reduce the number of parts, eliminate liquid blowing, and improve usability.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings.

  1-5 is explanatory drawing of embodiment of the liquid applicator which concerns on this invention, Comprising: The part which attached | subjected the same code | symbol in the figure represents the same thing.

  1A and 1B are external views and longitudinal sectional views of the liquid applicator, FIG. 2 is a detailed longitudinal sectional view of the vicinity of the tip of the liquid applicator, and FIG. a) is a perspective view, (b) a rear view, (c) is a side view, (d) is a longitudinal sectional view, and FIG. 4 is an explanatory view of a liquid introduction pipe for coating liquid, (a) is an external perspective view. (B) is a rear view, (c) is a side view, (d) is a longitudinal sectional view, and FIG. 5 is an explanatory view of a valve member provided in the liquid applicator, and (a) and (b) are closed. FIG. 2C is an external view and a vertical cross-sectional view in an open state. FIG.

  As shown in FIGS. 1 and 2, the liquid applicator according to the embodiment is provided with a cartridge-type coating liquid storage tank 30 in the applicator main body 20, and the tip 20 a of the applicator main body 20 is tapered. A hollow cylindrical tip shaft 24 is provided, a coating member 21 such as a brush is inserted into the tip shaft 24 and the tip portion of the coating member 21 is exposed, and the distal end portion of the applicator main body 20 is provided. A liquid introduction pipe 22 for guiding the coating liquid in the tank 30 is provided on the coating member 21 at 20a, and a rear end thereof is partially cut away so that the liquid tank 30 can be easily knocked. When the tank 30 is knocked, the valve device 60 discharges the coating liquid in the tank 30 to the coating member 21 through the liquid introduction pipe 22.

  Specifically, as shown in FIG. 2, the distal end portion 20 a of the applicator main body 20 has a stepped diameter and a male screw is formed on the outer peripheral surface thereof, and the male screw of the distal end portion 20 a is the front shaft 24. The liquid introduction pipe 22 and the application member 21 are fixed by the front shaft 24 by screwing into a female screw formed on the inner peripheral surface of the rear part.

  The applicator member 21 is provided with a flange 21a integrally formed at the rear end thereof. The application member 21 can be formed in various shapes such as a brush-like shape formed from a resin made of an open-cell body or a plurality of resin-made bristles. The flange portion 21a is formed in a flange shape in which the rear portion of the resin application member 21 is expanded by heat welding or the like.

  As shown in FIGS. 2 and 3, the front shaft 24 is engaged with the flange 21 a of the application member mounted from the opening of the front shaft 24 to prevent the tip from coming off. A claw portion 25 that is elastically deformable in the radial direction of the shaft 24 is integrally formed on the inner peripheral surface of the tip shaft 24.

  In the claw portion 25, a cantilever plate or a cantilever columnar body that can be elastically deformed from the middle of the opening of the front shaft 24 is extended rearward in a multivalve shape. When the applicator member 21 is inserted into the opening of the front shaft 24 from the rear end portion (the flange portion 21a) side of the claw portion 25, the claw portion 25 is brought into its original position when the hook portion 21a is pressed against the claw portion 25. Structure that is elastically deformed radially outward from the front shaft 24 and further advances further, and the rear end portion of the claw portion 25 that has returned to the original position is locked and held by the flange portion 21a when the flange portion 21a is not pressed. It has become. In addition, the original position of the nail | claw part 25 means the state before the nail | claw part 25 deform | transforms, when the said collar parts 21a contact | win the application member 21 in the front-axis | shaft 24 opening.

  As shown in FIGS. 2 and 4A to 4D, the liquid introduction tube 22 is sandwiched and fixed between the distal end portion 20 a of the applicator main body 20 and the front shaft 24. The rear end portion of the liquid introduction tube 22 is cylindrical, and the hollow portion 22b at the center thereof communicates with the coating member 21. The front end of the valve rod 41 of the valve device 60 (valve member 40 described later) and the liquid introduction tube 22 are connected. It is in contact with the rear end. The liquid introduction pipe 22 and the valve rod 41 of the valve member 40 are in contact with each other so that the liquid from the valve member 40 does not completely adhere so that the liquid from the valve member 40 can flow into the hollow portion 22b at the rear end of the liquid introduction pipe 22. A notch 22 c is formed at the rear end portion of 22.

  Further, a pipe-like discharge port portion 23 for supplying a liquid to the application member 21 is integrally formed at the distal end portion of the liquid introduction tube 22 at the distal end portion 22 a of the liquid introduction tube 22. A pipe-shaped discharge port portion 23 is inserted, and a slit structure (slit groove) 23a cut backward is applied to the tip of the pipe-shaped discharge port portion 23.

  As shown in FIGS. 1 and 2, the liquid inlet tube 22 has a pipe-like discharge port portion 23 having a distal end disposed substantially at the same position as the distal end portion of the front shaft 24. As shown in FIG. 4, the pipe-shaped discharge port portion 23 has an outer diameter and an inner diameter smaller than that of the liquid introduction pipe 22. In this case, in the liquid introduction tube 22, the inner diameter of the hollow portion 22b at the rear end is larger than the inner diameter of the tip portion 22a, so that the pipe-shaped discharge port portion 23 is larger than the inner diameter of the entire liquid introduction tube 22. The inner diameter is small. A plurality of ribs 22a1 for preventing an increase in internal volume are provided on the inner peripheral portion of the distal end portion 22a of the liquid introduction tube 22 continuous to the pipe-shaped discharge port portion 23.

  In addition, a flange portion 28 having a hook shape that opens forward is formed on the outer peripheral portion of the distal end portion 22a of the liquid introduction tube 22.

  Here, seal portions capable of maintaining a sealed state inside the front shaft 24 at the time of capping are formed on the front shaft 24 and the liquid introduction tube 22, respectively.

  That is, the front shaft 24 side seal portion is sealed when the surfaces of the tapered surface 28a and the corner portion 26 come into contact as shown in FIG. As shown in FIG. 3, the corner 26 is formed on the inner peripheral surface of the cylinder over the entire circumference, further rearward from the position where the diameter of the claw portion 25 on the inner surface of the front shaft 24 is increased in a step shape. Any of a slope portion or a corner portion, or a slope portion or a corner portion that has a diameter reduced in front of the female screw 24a of the front shaft and is formed on the entire inner peripheral surface of the cylinder. The corner may be R.

  The liquid-introducing pipe 22 side seal portion on the other side is formed such that the front-end-side outer peripheral surface portion (saddle-like portion) of the flange portion 28 formed on the outer peripheral surface of the liquid introducing tube 22 protrudes in the outer diameter direction on the taper surface 28a that opens rearward. Thus, the contact surface with the corner portion 26 is a flange portion 28 formed on the tapered surface 28a.

  A female screw (indicated by reference numeral 24a in FIG. 3) is formed on the inner peripheral surface of the rear portion of the tip shaft 24, a male screw is formed on the outer periphery of the tip portion 20a of the applicator main body 20, and the front shaft 24 is connected to the applicator main body 20. It is possible to maintain the sealed state in the front shaft 24 with the corner portion 26 pressed against the tapered surface 28a of the outer peripheral surface portion of the flange portion 28 when screwed into the front end portion 20a of the flange portion 28. This is the structure.

  As shown in FIGS. 1 and 2, the liquid tank 30 is accommodated in the cylindrical interior of the applicator main body 20, has an opening 31 at the tip, and accommodates a coating liquid such as a Manicia liquid therein. is doing. The rear end of the liquid tank 30 is exposed to the outside due to the cutout of the applicator main body 20. The tip opening 31 of the liquid tank 30 is provided with a valve device 60 to which a valve member 40 is fixed by an inner front shaft 50.

  As shown in FIG. 5, the valve member 40 includes a valve rod 41, a spring receiver 42, a valve seat 43, and a spring 44 made of an elastic body, and as shown in FIGS. 1 and 2, the front end opening of the liquid tank 30. 31 is fixed by an inner front shaft 50.

  A front end portion 41 a of the valve rod 41 of the valve member 40 is in contact with a notch portion 22 c which is a rear end of the cylindrical liquid introduction pipe 22 fixed together with the application member 21. When the liquid tank 30 is not knocked, the valve rod 41 of the valve member 40 contacts and seals the valve seat 43 as shown in FIG. A portion of the valve rod 41 that is in contact with the spring receiver 42 is a flange portion 41 b that faces the front (front end side) of the valve member 40.

  As shown in FIGS. 5A to 5D, the spring receiver 42 of the valve member 40 has a plurality of liquid inflow windows 42a on the outer periphery, and the tip of the flange 41b portion of the valve rod 41 during the knocking operation. Moves to the portion of the window portion 42a (see FIGS. 5C and 5D).

  At the time of non-knock, the valve stem 41 is pressed against the valve seat 43 side by a spring 44 and is sealed by the valve seat 43 and a tapered portion 41c at the tip of the valve stem 41 [FIGS. b)]. The piston portion 41d of the valve rod 41 is in contact with the inside of the spring receiver 42, and the piston portion 41d is open in a bowl shape toward the front. The spring receiver 42 knocks inside, and when the valve rod 41 is pushed into the valve member 40 by the liquid introduction tube 22, the piston portion 41d of the valve rod 41 is located behind the rectangular window portion 42a, and the liquid tank The liquid in 30 can flow in front of the piston portion 41 d of the valve rod 41. The rear end portion of the valve stem 41 can slide back and forth without resistance by a valve stem holder 41e held in the rear end hole 42b of the spring receiver 42, but from the liquid tank 30 to the front of the flange portion 41b in the valve member 40. The liquid flows in through the rectangular window 42a.

  The valve member 40 configured in this manner is fitted into the opening 31 of the liquid tank 30 and attached by fixing the inner shaft 50 and the liquid tank 30 with a screw, and constitutes a valve device 60. Further, as shown in FIG. 2, a packing (seal member such as an O-ring) 52 made of an elastic body is disposed between the end face of the valve seat 43 of the valve member 40 and the lower part of the opening 51 of the inner front shaft 50. The liquid introduction pipe 22 and the end face of the valve seat 43 of the valve member 40 are in close contact with each other. Thereby, by knocking the liquid tank 30, even if the liquid introduction pipe 22 slides between the packing 52, the liquid discharged from the valve member 40 by the packing 52 leaks to the outside of the liquid introduction pipe 22. Without entering the hollow portion 22 b in the liquid introduction pipe 22, the liquid is introduced to the application member 21.

  Next, the operation of the above-described embodiment will be described.

  According to the liquid applicator according to the embodiment having the above-described configuration, the claw portion 25 presses the claw portion 21a against the claw portion 25 when the application member 21 is inserted into the opening of the front shaft 24 from the rear end side. When the claw portion 25 is elastically deformed from the original position to the outer side in the radial direction of the front shaft 24, when the collar portion 21a is not pressed, the rear end portion of the claw portion 25 returned to the original position is locked to the collar portion 21a. Since the application member 21 is inserted through the opening of the front shaft 24, the application member 21 can be mounted on the claw portion 25, and the front shaft 24 is centered between the application member 21 and the front shaft 24. There is no need to mount the, improving the assembly workability.

  In addition, the front shaft 24 side seal portion is formed with a corner portion 26 having an R-shaped tip portion facing in the axial direction projecting on the inner peripheral surface of the front shaft 24 over the entire circumference, and the liquid introduction tube 22 side that is the counterpart side The seal portion is an outer peripheral surface of a flange portion 28 formed on the outer peripheral surface of the liquid introduction tube 22 and is composed of a flange portion 28 whose contact surface with the corner portion 26 is formed on a tapered surface 28a. Since a female screw (24a) is formed on the inner peripheral surface of the rear portion and a male screw is formed on the outer periphery of the distal end portion 20a of the applicator main body 20, when the front shaft 24 is screwed into the distal end portion 20a of the applicator main body 20 and assembled. The corner portion 26 is pressed against the tapered surface 28a of the flange portion 28 to maintain the sealed state, and the corner portion 26 contacts the tapered surface 28a of the flange portion 28, so that the sealed state can be easily maintained. .

  Therefore, a sealing member for holding the application member 21 formed of a relatively soft material such as PE and maintaining a sealed state is not necessary, and an increase in cost can be prevented.

In addition, a pipe-like discharge port portion 23 for supplying a liquid to the application member 21 is integrally formed at the distal end portion of the liquid introduction pipe 22, and the pipe-like discharge port portion 23 is inserted from the rear end of the application member 21. By applying a slit structure 23a cut rearward at the tip of the pipe-shaped discharge port portion 23, when the coating liquid is discharged through the slit, the coating liquid is discharged to the side and the pressure is directly applied to the coating member 21. Since it is possible to prevent the addition, it is possible to eliminate the liquid blowing.
Therefore, the liquid discharge port can be disposed near the tip of the front shaft 24 by preventing the liquid from being blown out.

  In addition, since the pipe-like discharge port portion 23 is disposed in the liquid introduction tube 22 at substantially the same position as the front end portion of the front shaft 24, the application liquid is applied to the application member 21 through the liquid introduction tube 22. The time between arrivals will be short and convenient.

  In addition, the pipe-like discharge port portion 23 is formed to have an inner diameter smaller than that of the liquid introduction tube 22, and an internal volume is formed in the inner peripheral portion of the liquid introduction tube 22 tip 22 a continuous to the pipe-like discharge port portion 23. Since the rib 22a1 for preventing the increase is provided, the pressure increase in the liquid introduction tube 22 is easily transmitted during ejection, and the time required for the coating liquid to reach the coating member 21 through the liquid introduction tube 22 is further shortened and further easy to use. Become a thing.

  Therefore, it is possible to provide excellent effects such as the provision of a liquid applicator that can reduce the number of parts, eliminate liquid blowing, and improve usability.

In addition, the liquid applicator of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.
That is, in the above embodiment, the valve member of the valve device is shown to discharge the coating liquid in the tank by knocking operation. However, in the present invention, the piston is advanced in the tank by the rotating operation to discharge the coating liquid. The present invention can also be implemented in the same manner with a feeding-type liquid applicator.

It is explanatory drawing of embodiment of the liquid applicator which concerns on this invention, Comprising: (a), (b) is the external view of a liquid applicator, and a longitudinal cross-sectional view. It is a detailed longitudinal cross-sectional view near the front-end | tip part of the said liquid applicator. It is explanatory drawing of the front axis | shaft of the said liquid applicator, Comprising: (a) is a perspective view, (b) Back view, (c) is a side view, (d) is a longitudinal cross-sectional view. It is explanatory drawing of the liquid inlet tube of the said liquid applicator, Comprising: (a) is an external appearance perspective view, (b) is a rear view, (c) is a side view, (d) is a longitudinal cross-sectional view. It is explanatory drawing of the valve member provided in the said liquid applicator, (a), (b) is an external view in a closed state, a longitudinal cross-sectional view, (c), (d) is an external view in an open state, a longitudinal cross-section FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Applicator main body 20a Tip part 21 Application member 21a Gutter part 22 Liquid introduction tube 22a Tip part 22a1 Rib 22b Hollow part 22c Notch part 23 Pipe-shaped discharge port part 23a Slit structure 24 Lead shaft 24a Tip screw female screw 25 Claw 26 Corner portion 28 Flange portion 28a Tapered surface 30 Tank 31 Opening portion 40 at the front end of the tank Valve member 41 Valve rod 41a Front end portion 41b Hook portion 41c Taper portion 41d Piston portion 41e Valve rod holder 42 Spring receiver 42a Window portion 42b Rear end hole 43 Valve seat 44 Spring 50 Inner shaft 51 Opening 52 Packing 60 Valve device

Claims (5)

A tank for containing a coating liquid is provided in the applicator main body, a tapered hollow cylindrical tip is provided at the tip of the applicator main body, and an application member such as a brush is inserted into the tip. Provided with the front part of the application member exposed, a liquid introduction pipe for guiding the application liquid in the tank to the application member at the tip of the applicator main body, and the application liquid in the tank by knocking or rotating operation, In the liquid applicator for discharging to the application member through the liquid introduction tube,
A collar is provided at the rear end of the application member,
The front shaft has a claw portion that is elastically deformable in the radial direction of the front shaft and is locked to the collar portion of the application member mounted from the opening of the front shaft to prevent the front shaft from coming off. Integrally formed on the inner peripheral surface of
When the claw part is pressed against the claw part when the application member is inserted into the front axis opening from the rear end side, the claw part elastically deforms from the original position to the front axis radial direction, A liquid applicator characterized by having a structure in which a rear end portion of a claw portion that has returned to its original position is locked to and retained by the collar portion when the collar portion stops being pressed. Seal portions that can maintain a sealed state inside the front shaft at the time of capping are respectively formed on the front shaft and the liquid introduction pipe,
The front shaft side seal portion is formed by projecting a corner portion having an R shape at the tip portion facing in the axial direction on the inner peripheral surface of the front shaft over the entire circumference,
The liquid inlet tube side seal portion which is the counterpart side is an outer peripheral surface of the flange portion formed on the outer peripheral surface of the liquid inlet tube, and includes a flange portion in which a contact surface with the corner portion is formed as a tapered surface,
A female screw is formed on the inner peripheral surface of the rear end of the front shaft, and a male screw is formed on the outer periphery of the tip of the applicator main body. When the front shaft is screwed into the front end of the applicator main body, The liquid applicator according to claim 1, wherein the liquid applicator is configured to be pressed against the tapered surface of the flange portion to maintain a sealed state.   A pipe-like discharge port portion for supplying a liquid to the application member is integrally formed at the tip of the liquid introduction pipe, and a pipe-like discharge port portion is inserted from the rear end of the application member. The liquid applicator according to claim 1 or 2, wherein a slit structure is provided at a tip thereof so as to cut backward.   The liquid applicator according to claim 3, wherein a pipe-shaped discharge port portion is disposed in the liquid introduction pipe at substantially the same position as the front end portion of the front shaft.   The pipe-shaped discharge port portion has an inner diameter smaller than that of the liquid introduction tube, and a rib for preventing an increase in the internal volume is formed on the inner peripheral portion of the liquid introduction tube tip portion continuous to the pipe-shaped discharge port portion. The liquid applicator according to claim 3 or 4, wherein the liquid applicator is provided.

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