JP2000197841A - Dispenser needle and method for applying liquid material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dispenser needle which uses a proper amount of a liquid material and can apply it in a uniform thickness and a method for applying the liquid material. SOLUTION: A dispenser needle 1 comprises a male screws part 2 connected to a syringe, a syringe fitting part 3 which is connected directly with the part 2 and used for an attaching/detaching operation to/from the syringe, and a liquid guide part 4 which is connected with the part 3 and holds a brush part 5 with its tip part caulked. A liquid discharge hole 6 for discharging a liquid material is formed in one surface of the caulked part of the part 4. Pig bristles, reccoon dog bristles, horse bristles, polyamide fibers, and other are used for the rush part 5. In application, a proper amount of the liquid material discharged for the hole 6 penetrates into the brush part of the part 5 along the outer surface. By moving the dispenser needle 1 toward the hole 6 side along a coating surface, uniform coating is performed on the coating surface through the brush part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dispenser needle and a liquid material applying method, and more particularly to a dispenser needle used when a liquid or paste-like liquid application material is uniformly applied to a predetermined object. And a method for applying a liquid material.

[0002]

2. Description of the Related Art Conventionally, when a liquid or paste-like liquid coating material (hereinafter abbreviated as a liquid material) is uniformly applied to a predetermined object, for example, it is generally used. As seen in a dispenser that receives the input of pressurized air supplied through a tube from a liquid metering device included in the dispenser,
A liquid material contained in a predetermined amount in the syringe is discharged through a dispenser needle attached to the syringe, and the object is applied to the application surface by manual operation of an operator.

[0003] An example of this type of conventional dispenser needle is shown in FIGS. 4A and 4B as an external view. In the conventional example of FIG. 4A, the dispenser needle 1 is a syringe (not shown in the description of the conventional example, but see the syringe 7 corresponding to the dispenser needle 1 in one embodiment of the present invention in FIG. 2). A male screw portion 2 for mounting to the female screw portion at the tip of the syringe, a syringe mounting portion 3 provided with a projection so that an operator can easily attach and detach the dispenser needle 1 to and from the syringe 7 by rotating a finger. In order to guide the liquid material in the syringe 7 to the object, the liquid guide unit 4 is formed by a hollow metal pipe.
In the case of this conventional example, the application work on the application surface of the predetermined target is performed by the liquid material discharged from the tip of the liquid guide section 4. Further, in another conventional example, as shown in FIG.
The Teflon pipe 8 is connected. In this conventional example, the liquid material is discharged to the application surface of the object through the Teflon pipe 8 to perform the application operation. As another conventional example, in the dispenser needle 1 shown in FIG. 4 (a), there is used a dispenser needle 1 in which the distal end portion of the liquid guide portion 4 is appropriately bent so as to facilitate the application operation.

[0004]

In the above-described conventional dispenser needle, as described above, the external thread portion 1 is provided.
In the state where the liquid material is attached to the syringe 7, the liquid material is discharged from the tip of the liquid guide portion 4 to perform the coating operation. The inner diameter of the distal end portion of the liquid guide portion 4 has a cylindrical shape corresponding to the male screw portion 2 and the syringe mounting portion 3 to be connected, as is apparent with reference to FIG. For this reason, the application state of the application surface performed by the liquid material discharged from the tip of the liquid guide portion 4 to the application target includes the pressurized state of the air inside the syringe 7,
It is greatly affected by the size of the inner diameter of the liquid guide portion 4 of the dispenser needle 1, the viscosity of the liquid material, the application method by the dispenser needle 1, and the like.

[0005] As an example, a soldered portion of a mounted electronic component mounted on a printed circuit board by soldering,
In the coating agent application method for performing coating including the mounted electronic components, the tip of the dispenser needle 1 is positioned substantially at the center of the mounted electronic component to be applied, and the liquid is ejected from the distal end of the liquid guide portion 4. The application operation is performed with a predetermined amount of the coating agent. According to the conventional method of applying a coating agent using the dispenser needle 1, the coating agent is dripped and spreads along the outer surface of the mounted electronic component after a lapse of a predetermined time, so that the coating agent covers the entire surface of the mounted electronic component. Is performed.
However, in the coating in this example, as described above, since the dripping effect of the coating agent is used, when a liquid material having a high viscosity is applied as in the case of the coating agent, it is relatively difficult to apply. A large amount of liquid material is required, the thickness of the applied surface is enlarged, and the required amount of the coating agent is also increased. Further, since the dripping effect of the liquid material is used, the size of the outer shape of the application target is limited to a relatively small target. Therefore, when a liquid material is applied to such an application target using the conventional dispenser needle 1, it is necessary to apply the liquid material so that the thickness of the liquid material becomes a necessary minimum uniform thickness. And the disadvantage that the amount of the liquid material used increases unnecessarily, and the size of the object to be applied is limited to a relatively small one. .

Also, unlike the above-described coating method, when coating the mounted electronic component, the tip opening of the liquid guide portion 4 of the conventional dispenser needle 1 is scanned along the outer shape of the mounted electronic component, and the liquid is dispensed. When the coating is performed using the liquid material discharged from the guide unit 4, the entire surface is coated by scanning the liquid guide unit 4 without using the sagging effect. Is extremely large. Also,
Since the scanning of the tip of the liquid guide section 4 is performed artificially by an operator, and the scanning speed is not necessarily uniform, the thickness of the liquid material on the application surface is as small as necessary. It has the disadvantage that it is not possible to apply it to a thickness.

An object of the present invention is to eliminate the disadvantages of the above-mentioned conventional dispenser needle and liquid material application method,
Regardless of the material of the liquid material and the size of the outer shape of the object to be applied, the appropriate amount of liquid material is used on the application surface of the object to be applied, and the thickness is evenly applied to the application surface. And a method for applying a liquid material.

[0008]

A dispenser needle according to a first aspect of the present invention is a dispenser needle used as a dispenser applicator for applying a liquid material to an object to be applied. The dispenser needle is provided at a tip of a syringe for accommodating the liquid material. A male screw part formed so that the syringe and the dispenser needle are attached to and detached from the female screw part by a screwing function, and the liquid material flows inside a hollow housing; Connected to the syringe, and functions as a handle for rotating the male screw portion when manually attached to and detached from the syringe, and a syringe mounting portion formed so that the liquid material flows through the inside of the hollow housing; and The liquid material flows through the inside of the housing connected to the syringe mounting portion, the tip portion is shaped into a flat plate to form a caulked portion, A liquid guide portion having a liquid outflow hole for discharging a liquid material to only one surface of the caulking portion, while caulking and holding a brush portion enabling uniform and flat liquid application at a tip of the caulking portion. And characterized by comprising:

Further, the liquid material applying method of the second invention is as follows.
In a liquid material application method of applying a liquid material to an object to be applied using a dispenser needle, a liquid outflow hole provided on one surface of a caulking portion at a tip of a liquid guide portion of the dispenser needle is provided on the application surface of the object to be applied. The dispenser needle is tilted so as to face diagonally, and the liquid material flowing out of the liquid outflow hole is applied to the application target via the brush portion held by the caulking portion. The apparatus is characterized in that the dispenser needle is scanned in the direction of the one surface provided with the outflow hole.

[0010]

According to the above configuration and method, it is possible to apply a uniform thickness to the object to be applied, regardless of the material of the liquid material and the size of the shape of the object to be applied.

[0011]

Next, the present invention will be described with reference to the drawings.

An embodiment of the present invention is directed to a male screw part for attaching and detaching a syringe and a dispenser needle to and from a female screw part provided at the distal end of a syringe, and a male screw part connected to the male screw part for attaching and detaching to and from the syringe. A syringe mounting portion functioning as a handle for rotating the male screw portion, and connected to the syringe mounting portion to form a flat caulked portion at the tip end, at the tip of the caulking portion, at a uniform, and A liquid guide portion having a liquid outflow hole on one surface of the caulking portion, while holding a brush portion for performing flat application.

FIG. 1 is a front view and a side view showing one embodiment of the present embodiment. FIG. 1A shows a front view, and FIG.
(B) shows a side view. FIG. 2 is a view showing a state where the present embodiment is attached to a syringe 7. As shown in FIG. 1, the dispenser needle 1 of the present embodiment includes a male screw portion 2 connected to a syringe 7 (see FIG. 2), and is directly connected to the male screw portion 2 to attach and detach the syringe 7. A syringe mounting portion 3 for rotating the male screw portion 2 by hand at times, and a liquid guide portion 4 connected to the syringe mounting portion 3 and holding a brush portion 5 whose tip portion is caulked and performs liquid application.
And is provided. A liquid outflow hole 6 through which the liquid material flows out is provided on one surface of the caulked portion of the liquid guide portion 4. Further, as a composition of the brush portion 5, for example, pig hair, raccoon hair, horse hair, nylon fiber, or the like is used, and the brush portion 5 is swaged and held at the swaged portion of the liquid guide portion 4.

In FIG. 2, a predetermined amount of liquid material is stored in a syringe 7, and the inside of a hollow housing of the male screw portion 2, the syringe mounting portion 3 and the liquid guide portion 4 is
The liquid material is formed as a flow passage. Upon receiving an input of pressurized air supplied through a tube 9 from a predetermined liquid metering device (not shown), the liquid material in the syringe 7 is turned into a male screw portion of the dispenser needle 1 attached to the syringe 7. The liquid flows into the housing of the liquid guide section 4 through the syringe mounting section 3 and the liquid guide section 4 and flows out by an appropriate amount through a liquid outlet hole 6 provided on one side of the caulking section. The liquid material that has flowed out sequentially penetrates into the brush portion forming the brush portion 5 along the outer surface of the caulking portion.
In this state, by scanning the dispenser needle 1 along the application surface, application of a uniform thickness to the application surface of the application object is performed via the brush portion.
A feature of the present invention resides in that a brush portion is provided by caulking the tip of the liquid guide portion 4 and holding the brush portion 5, and a liquid outflow hole 6 is provided in the caulked portion. By causing the dispenser needle 1 to scan along the application surface via the mutual function of these two, the liquid material is uniformly supplied to the application surface, and the coating with a uniform thickness is performed.

When applying to the object to be coated using the dispenser needle of the present embodiment, the liquid material is uniformly applied to the application surface of the object to be coated by performing the application by the following coating method. be able to.

That is, as shown in the side view of FIG. 3A, the liquid outlet hole 6 provided on one surface of the caulking portion at the tip of the liquid guide portion 4 of the dispenser needle 1 is connected to the application surface of the application object. The dispenser needle 1 is inclined so as to obliquely face the liquid material 10, and the liquid material flowing out of the liquid outflow hole 6 sequentially penetrates into the brush portion of the brush portion 5 by an appropriate amount through the outer surface of the caulking portion, and the liquid material Is set to be uniformly supplied to the application surface 10 of the application object via the brush portion, and the scanning direction 11 corresponding to the side where the liquid outflow holes 6 are provided is set with respect to the object application surface 10. By scanning the dispenser needle 1 toward, it is possible to perform coating with a uniform thickness on the coating surface 10. FIG. 3B is a diagram illustrating a state of the liquid guide unit 4 and the brush unit 5 during scanning, as viewed from the scanning direction 11 side.

[0017]

As described above, according to the present invention, the tip of a liquid guide for discharging a liquid material is swaged to form a brush portion by a brush, and the liquid material is applied to one surface of the swaged portion. By providing the liquid outflow hole to be made to flow out, the liquid material which has flowed out by an appropriate amount from the liquid outflow hole penetrates into the brush portion along the outer surface of the caulking portion, and the dispenser needle moves the liquid outflow hole along the application surface. By scanning in the direction of the provided side, there is an effect that coating with a uniform thickness can be performed on the coating surface of the coating target.

[Brief description of the drawings]

FIG. 1 is an external view showing one embodiment of the present invention.

FIG. 2 is an external view showing a connection state between the embodiment and a syringe.

FIG. 3 is a view showing a coating state on a coating surface according to the embodiment.

FIG. 4 is an external view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dispenser needle 2 Male screw part 3 Syringe mounting part 4 Liquid guide part 5 Brush part 6 Liquid outflow hole 7 Syringe 8 Teflon pipe 9 Tube 10 Application surface 11 Scanning direction

Claims (2)

[Claims] 1. A dispenser needle used as a dispenser application device for applying a liquid application material to an object to be applied, wherein a female screw portion provided at a tip of a syringe accommodating the liquid application material is screwed. The syringe is attached to and detached from the dispenser needle by the function, and a male screw portion formed so that the liquid application material flows through the inside of the hollow housing. A syringe mounting portion formed so that the liquid application material flows through the inside of the hollow housing, while functioning as a handle for rotating the male screw portion when the syringe mounting portion is attached to and detached from the syringe, and connected to the syringe mounting portion. The liquid application material is circulated inside the housing, the tip portion is shaped into a flat plate to form a caulked portion, and at the tip of the caulked portion, A liquid guide portion having a brush portion that enables uniform and flat liquid application by caulking and having a liquid outflow hole for allowing a liquid coating material to flow out only to one surface of the caulking portion. Dispenser needle characterized by being constituted. 2. A liquid material application method for applying a liquid application material to an object to be applied using a dispenser needle, wherein a liquid outflow hole provided on one surface of a caulking portion at a tip of a liquid guide portion of the dispenser needle is applied. The dispenser needle is inclined so as to obliquely face the application surface of the object, and the liquid application material flowing out from the liquid outlet hole is applied to the application object via the brush portion held by the caulking portion. A liquid material application method, wherein a dispenser needle is scanned toward the one surface where the liquid outflow holes are provided so that the application is performed.