JP3474664B2 - Applicator - Google Patents

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, and a coated surface such as a paper surface. It relates to an applicator for applying to.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Application Laid-Open No. 5-51480, a shaft body (coating solution tank) which contains a fluid such as a correction solution as a coating solution therein and a discharge for discharging the fluid. A holder (chip) having a ball house provided with an outlet at the tip, and a ball (spherical coating body) housed in the ball house and biased forward and a part of which faces the outside from the discharge port. There is an applicator provided.

The ball is accommodated movably in a direction in which it comes into contact with and separates from an inward end edge in a ball house, and closes and opens the discharge port by making contact with and separate from the ball house. Is. A ball seat is formed at the rear end of the ball house to receive the rear surface of the ball when the ball is pressed against the surface to be coated and moves backward. At the center of the cross section of this ball seat,
A fluid guide hole for guiding the fluid from the shaft body to the ball house is provided. Furthermore, in the fluid guide hole,
A mover (biasing means) that contacts the rear surface of the ball and is urged by the spring to urge the ball forward is inserted.

According to the conventional applicator having the above construction, the user presses the ball against the surface to be coated to open the ejection port and bring the ball receiving surface into contact with the rear surface of the ball. The fluid can be applied to a predetermined portion of the surface to be coated while rotating the ball.

[0005]

By the way, in the above-mentioned conventional applicator, since the rear surface of the applicator closes the fluid guide hole when the ball is pressed against the surface to be coated and retracts,
The supply of the fluid from the fluid guide holes cannot be expected. Therefore, by providing a vertical groove in the inner wall of the fluid guide hole along the guide direction, the fluid is supplied into the ball house through a slight gap between the vertical groove and the ball.

However, when the user rolls the ball on the surface to be coated and applies the ball, the ball rotates while being pressed against the ball seat, so that the ball seat wears when the applicator is repeatedly used. Then, the balls may also block the vertical groove, which is the only fluid supply path, and the fluid may not be supplied into the ball house.

[0007] These problems are particularly significant when the fluid has a low viscosity or contains a pigment.

That is, when the viscosity of the fluid is high, the fluid itself effectively acts as a lubricant against the wear of the ball seat, but in the case of a fluid of low viscosity, the lubrication effect is low, so The seat is very easy to wear. In addition, when the viscosity of the fluid is less than 30 cps, the wear of the ball seat is greatly affected.

A correction liquid containing an organic pigment or an inorganic pigment,
Alternatively, when a liquid such as an ink containing a pigment or the like and having a hiding power is used as the coating liquid, the titanium oxide etc. contained therein acts like an abrasive in the wear, so that the ball seat is further worn. Will end up.

In addition, since the fluid contains a pigment which easily sediments, an applicator in which an agitating member such as a ball or a rod for agitating the fluid in the shaft body is required. If stored for a long period of time, sediment will adhere to the periphery of the ball seat and block the opening of the vertical groove.If the applicator is used repeatedly in this state, it will flow due to wear of the ball seat. This lowers the discharge rate of the body.

In order to solve these problems, it is conceivable to increase the inner diameter of the ball house to increase the clearance between the ball and the inner wall of the ball house. With this configuration, the opening area of the vertical groove can be increased, and the fluid can be prevented from flowing out even if the ball seat is worn. However, in this case, as the inner diameter of the ball house becomes larger, the outer diameter of the holder becomes larger, which makes the holder larger than the ball diameter, and when writing letters or applying small parts. ,
There is an inconvenience that the usability becomes poor. In addition, the clearance between the ball and the ball house may become unnecessarily large, in which case the fluid may flow out excessively and an appropriate amount cannot be discharged.

Even in the applicator disclosed in Japanese Utility Model Laid-Open No. 57-193578, these problems can occur without change. Further, in the ballpoint pen disclosed in Japanese Utility Model Laid-Open No. 52-39228, two balls are arranged front and back in a ball holding portion (corresponding to the ball house), and a ball receiving portion (corresponding to the ball receiving seat). To reduce wear. However, since the balls are stored in close contact with the plurality of protrusions formed on the inner wall of the ball holding portion,
When the two balls retract during writing, the inner ball completely blocks the fluid guide hole formed in the center of the ball receiving portion, and the ink (corresponding to the fluid) is filled with the ink introducing groove (the vertical (Corresponding to the groove).
Ink cannot be supplied sufficiently. At the same time, in Japanese Utility Model Application Laid-Open No. 52-39228, the sealability at the opening (corresponding to the discharge port) at the tip depends on the clearance between the ball and the opening, and depending on the type of fluid, the opening may occur. The parts may not be closed / opened sufficiently, and problems such as liquid leakage may occur.

The present invention has been made in view of the above-mentioned conventional applicator, and increases the outer diameter of the holder even when the fluid has a low viscosity or contains a pigment. To provide a coating tool that prevents a decrease in the discharge amount of a fluid caused by repeated coating without causing a suitable amount of the coating liquid to be discharged well, and that securely closes and opens the discharge port. It is an issue.

[0014]

The constitution of the present invention for solving the above-mentioned problems is as follows. According to a first aspect of the present invention, there is provided a shaft main body containing a fluid therein, a holder having a ball house provided at a tip thereof with a discharge port through which the fluid flows out from the shaft main body, and the inside of the ball house. A ball that is rotatably held by the discharge port and partly faces the outside of the discharge port to serve as a coating surface, and the ball moves in a direction to come into contact with or separate from an inner wall around the discharge port. The discharge port is closed / opened by freely accommodating and abutting / disengaging, and a fluid is discharged from a gap between the discharge port by pressing a part of the ball against the surface to be coated. In the applicator to apply to the surface to be coated, the ball house, the inner diameter is configured by a substantially cylindrical smooth surface larger than the diameter of the ball, on the rear side of the ball in the ball house, Diameter is front A spherical evasion body having a size substantially equal to the diameter of the ball and movable in contact with the rear surface of the ball is disposed, and a part of the ball is covered at the rear end of the ball house. A ball seat is formed which receives the rear part of the avoiding body when the ball is moved rearward by being pressed against the application surface, and the fluid from the shaft main body is formed at a substantially central portion of the ball seat. A fluid guide hole for guiding the ball house is provided, and a plurality of vertical grooves are formed on the inner wall of the fluid guide hole radially around the fluid guide hole and formed along the guide direction of the fluid. In addition, the fluid guiding hole is inserted with a biasing means that contacts the rear surface of the avoiding body and biases the avoiding body and the ball toward the front side. When evacuated by pushing against Its center is characterized in that in contact with the inner wall and the ball seat of the ball house with a shift to one side of the lateral direction from the center axis of the ball house.

According to a second aspect of the present invention, there is provided a shaft main body having a fluid contained therein, a holder having a ball house provided at a tip thereof with a discharge port through which the fluid is discharged from the shaft main body, A ball that is rotatably held in the ball house and part of which faces the outside from the discharge port to serve as a coating surface, and the ball comes into contact with or separates from an inner wall around the discharge port. The discharge port is closed and opened by being accommodated so as to be movable in any direction and contacting with or separating from the discharge port. When a part of the ball is pressed against the surface to be coated, it flows from the gap with the discharge port. In an applicator for ejecting a body to apply to a surface to be coated, a diameter of the ball is smaller than a diameter of the ball and is in contact with a rear surface of the ball together with the ball in a rear side of the ball in the ball house. Avoidance of rotatably spherical is disposed,
The ball house has a large-diameter ball house having an inner diameter larger than the diameter of the ball and accommodating the ball, and is connected to the large-diameter ball house on the rear side thereof, and the large-diameter ball house. And a small-diameter ball house that has a smaller internal diameter than the avoiding body and accommodates the avoiding body, and has the large-diameter ball house and the small-diameter ball house, respectively. Is composed of a substantially cylindrical smooth surface, and at the rear end of the small-diameter ball house, a rear portion of the avoiding body when a part of the ball is pressed against the surface to be coated and the ball moves rearward. A ball seat for receiving the fluid is formed, and a fluid guide hole for guiding the fluid from the shaft body to the ball house is provided at a substantially central portion of the ball seat, and an inner wall of the fluid guide hole is formed. A plurality of vertical grooves that are radially arranged around the fluid guide hole and are formed along the guide direction of the fluid are provided, and the fluid guide hole contacts the rear surface of the avoidance body and The avoidance body and the biasing means for biasing the ball forward are inserted, and when the ball is pressed against the surface to be coated and retracts at the time of coating, the center of the avoidance body moves in the left-right direction from the central axis of the ball house. It is characterized in that it comes into contact with the inner wall of the ball house and the ball seat while being displaced to one side.

According to a third aspect of the present invention, the fluid contains a pigment, and a stirring member for stirring the fluid is housed in the shaft body.

The invention according to claim 4 is characterized in that the shaft main body is a coating liquid tank having high flexibility.

[0018]

[Action]

(Operation 1) According to the invention of claim 1, when a part of the ball is pressed against the surface to be coated at the time of coating, the spherical avoiding body moves rearward together with the ball to the ball seat. Abut. When the ball is moved while being pressed against the surface to be coated, the ball rotates, but the avoiding body hardly rotates for the following reasons.

Since a fluid is present between the ball and the avoidance body, this fluid acts as a lubricant to reduce the frictional resistance at the contact portion between the two. Moreover, the contact between the spherical avoidance body and the ball is point contact. Since both the ball and the evasion body are spheres, they can be easily procured with high accuracy and the sphericity can be easily obtained in the manufacturing process. Therefore, the surfaces of both are formed smoothly, and the frictional resistance is further reduced.

That is, due to the above-mentioned reasons (1), a slip occurs between the ball and the avoiding body, and the avoiding body hardly rotates. Therefore, the avoidance body does not substantially wear the ball seat, and the change in the opening area of the plurality of vertical grooves provided on the inner wall of the fluid guide hole is reduced.

(Operation 2) Since the ball house is composed of a substantially cylindrical smooth surface having an inner diameter larger than the diameter of the ball, the avoiding body and the ball are brought into contact with and separated from each other in the ball house ( Hereinafter, it is possible to move in a direction perpendicular to the front-rear direction (hereinafter, referred to as a left-right direction) at the same time. As a result, when a part of the ball is pressed against the surface to be coated and the ball retracts during coating, the avoider body has its center displaced to the left and right from the central axis of the ball house and the inner wall of the ball house and the ball house. It comes into contact with the seat.

For this reason, the opening surface of the fluid guide hole is not entirely blocked by the rear surface of the avoidance body. Therefore, the supply of the fluid to the balls and the discharge ports is performed not only from the plurality of vertical grooves but also from the fluid guide holes, and the flow state of the fluid is further improved.

Due to the above (action 1) and (action 2), even if the applicator is used for a long period of time, the initially set discharge flow rate of the fluid can be favorably maintained.

(Operation 3) According to the invention of claim 1, urging means for abutting the rear surface of the avoidance body in the fluid guide hole to urge the avoidance body and the ball forward. Since the ball is inserted, the ball is urged forward along with the avoiding body. As a result, the sealing property between the ball and the discharge port is improved, and the discharge port can be reliably closed and opened.

Next, the operation of claim 2 will be described. Also in claim 2, (action 1) according to claim 1,
The same applies to (action 2) and (action 3),
In addition to this, in the present invention, the ball house is composed of a large-diameter ball house in which the ball is housed and a small-diameter ball house in which the avoider is housed. The shift amount can be adjusted independently of the balls and the large diameter ball house by controlling only the inner diameter dimension of the small diameter ball house and the diameter dimension of the avoidance body.

Therefore, the avoidance body is further displaced to the one side in the left-right direction at the time of application by increasing the left-right movement amount of only the avoiding body regardless of the left-right movement amount of the ball that affects the feeling of application. Abutting against the inner wall of the small-diameter ball house and the ball seat in a closed state to further increase the area of the part where the fluid guide hole is not blocked, that is, the opened part, or By reducing the amount of movement, it is possible to prevent the adverse effect of the excessive displacement of the avoidance body in the left-right direction.

Further, according to the invention of claim 3, when the fluid contains a pigment and a stirring member for stirring the fluid is required in the shaft body, the pigment is precipitated. Even if the fluid adheres to the periphery of the ball seat, the opening area of the vertical groove is not reduced by the avoidance body due to (action 1), and at the same time, the fluid guide hole is prevented from flowing through the fluid guide hole due to (action 2). Since the supply is performed, the deposit can be quickly removed. Therefore, the fluid guide path is not clogged to prevent the fluid from flowing.

Further, according to the invention of claim 4, the fluid is, for example, made of a highly viscous liquid, or has an extremely high viscosity as the temperature decreases, and the fluid naturally flows out. Even when it ’s difficult
By pressing the shaft body, the fluid is supplied to the ball house. Therefore, even with an applicator using this type of fluid, it is possible to suppress a decrease in the amount of ejection due to wear of the ball seat and at the same time facilitate the ejection of the fluid.

[0029]

Embodiments of the applicator of the present invention will be described below with reference to the drawings. In the present invention, the applicator means a correction pen for applying the correction liquid on the surface to be coated, a writing tool such as a ballpoint pen for writing the water-based or oil-based ink on the surface to be coated, or the flow of other cosmetics or the like. An applicator that uses the body as an application liquid.

FIG. 1 is a vertical sectional view of the applicator of the first embodiment. 2 and 3 are enlarged vertical cross-sectional views of the tip of the applicator according to the first embodiment. FIG. 2 is a view showing a state in which the discharge port is closed, and FIG. It is a figure showing the state where it is. 4 and 5 are enlarged vertical cross-sectional views of the tip end portion of the applicator according to the second embodiment, and FIG. 4 is a view showing a state in which the discharge port is closed. FIG. 5 is a diagram showing a state in which the discharge port is open.

First, a first embodiment according to claim 1 will be described. As shown in FIGS. 1 and 2, the applicator 8 of the first embodiment includes a shaft main body 2 in which a fluid is housed, a mouth plastic 14 attached to the tip of the shaft main body 2, and a shaft main body 2
Has a ball house 4a provided at the tip with a discharge port 4a1 through which fluid from the container flows out, and a holder (also referred to as a chip) 4 fitted in a mouth plastic 14 and rotatable inside the ball house 4a. Is held by the discharge port 4
and a ball 6 facing the outside from a1 and serving as a coating surface,
The ball 6 contacts the inner wall around the discharge port 4a1.
The discharge port 4a1 is closed / opened by being movably accommodated in the direction of separation and abutting / separating, and by pressing a part of the ball 6 against the surface to be coated,
The fluid is discharged from the gap between the discharge port 4a1 and the surface to be coated.

Further, in this applicator 8, the ball house 4a, as shown in FIG. 2, is made up of a substantially cylindrical smooth surface having an inner diameter dimension D larger than the diameter d2 of the ball 6, and the inside of the ball house 4a. On the rear side of the ball 6, its diameter d1 is approximately the same as the diameter d2 of the ball, and
A spherical avoidance body 10 is provided which is in contact with the rear surface of the ball 6 and is movable together with the ball 6.

At the rear end of the ball house 4a, there is formed a ball seat 4a2 for receiving the rear surface of the avoiding body 10 when the ball 6 moves rearward due to a part of the ball 6 being pressed against the surface to be coated. To be done.

Further, a fluid guide hole 4b for guiding the fluid from the shaft main body 2 to the ball house 4a is provided at a substantially central portion of the ball seat 4a2 in cross section, and the fluid guide hole 4 is provided.
On the inner wall of b, a plurality of vertical grooves 4 arranged radially along the fluid guide hole 4b and formed along the fluid guide direction.
c is provided, and a biasing means 12 that contacts the rear surface of the avoidance body 10 and biases the avoidance body 10 and the ball 6 forward is inserted into the fluid guide hole 4b.

The configuration of each section will be described in detail below. As shown in FIG. 1, the shaft body 2 has a substantially cylindrical shape, and has a taper portion 2a that is slightly tapered toward the tip of the shaft body 2 and a continuous portion from the tip of the taper portion 2a. And a cylindrical portion 2b that is formed to be open. Further, the shaft body 2 is a highly flexible coating liquid tank and is capable of supplying the fluid inside thereof to the ball house 4a by being pressed and bent.

The mouth plastic 14 has a taper shape in which the outer peripheral surface of the front side portion is tapered toward the front end, and the taper portion 1 is formed at the rear end of the taper portion 14a via a step portion 14b.
A cylindrical portion 14c having an outer diameter smaller than the rear end of 4a is continuously provided. Further, on the inner peripheral surface of the rear portion of the cylindrical portion 14c,
A plurality of vertical ribs 14c1 are provided along the central axis. In the mouth plastic 14, the stepped portion 14b is the cylindrical portion 2b of the shaft body 2.
Is press-fitted into the shaft main body 2 until it hits the front end surface thereof.

The holder 4 is open at both front and rear ends, and
The tip portion has a substantially cylindrical shape with a taper, and is pressed into the mouth plastic 14 until its rear end contacts the tip of the vertical rib 14c1 of the mouth plastic 14, and its front half is exposed to the outside. It is connected to the mouth plug 14 in this state.

The ball house 4a, as shown in FIG.
The hole has a circular cross section and a smooth inner surface, and has a clearance between the ball 6 and the ball 6 so that the fluid can flow around the ball 6. Further, the discharge port 4a1 which is the tip end opening of the ball house 4a is generally called a caulking part, and after the ball 6 and the avoidance body 10 are inserted into the ball house 4a, the diameter d2 of the ball 6 is larger than the diameter d2 of the ball 6. Is also crimped to have a small caliber,
As a result, the ball 6 and the avoidance body 10 are confined and held in the ball house 4a in a rotatable and movable state.

The ball seat 4a2 projects inward from the inner wall of the holder 4, and is a mortar-shaped slope whose inner diameter decreases toward the rear.

The fluid guide hole 4b is a hole having a circular shape in a cross sectional view, and the plurality of vertical grooves 4c are the fluid guide holes 4b.
At a predetermined interval in the circumferential direction of b, the inner wall of the fluid guide hole 4b has a concave shape, and is provided at, for example, 6 places.

The urging means 12 has a fluid guiding hole 4 at the tip thereof.
b, a push rod 12a facing the rear end of the avoidance body 10 from the rear, and having a large diameter portion 12a1 at a substantially central portion in the longitudinal direction, and a large diameter portion fitted to the rear portion of the push rod 12a. A compression coil spring 12b whose front end abuts on the step surface of 12a1 and whose rear end is locked by the vertical rib 14c1.
Consists of. The urging means is not particularly limited to the urging means 12, and a spring member such as a plate-shaped spring or a compression coil spring having a reduced diameter is directly brought into contact with the rear end of the avoiding body 10. It may be one.

The avoidance body 10 includes a compression coil spring 12
It is sandwiched between the ball 6 and the push rod 12a by a predetermined elastic force of b, and when not coated, the center of the ball 6, the center of the avoidance body 10 and the center line of the push rod 12a are aligned on a straight line. Has become.

In the first embodiment, the diameters d2 and d1 of the ball 6 and the avoidance body 10 are φ1.0 (mm),
The inner diameter dimension D of the ball house 4a is φ1.1 (mm). Further, the movable amount of the ball 6 and the avoiding body 10 in the front-rear direction L is 0.1 (mm), and the movable amount of the ball 6 in the left-right direction W is about 0.04 (mm) on one side. The movable amount in the direction W is about 0.05 (mm) on one side. Also, the inner diameter dimension A of the fluid guide hole 4b is φ
0.7 (mm), and the dimension B between the bottoms of the opposing vertical grooves 4c is 1.0 (mm).

It should be noted that the movable amount of the ball 6 in the left-right direction W is set such that the avoiding body 6 retracts during application and the ball receiving seat 4a is moved.
It is determined by the clearance between the ball 6 and the ejection port 4a1 in the state of hitting 2. In the first embodiment, the ball 6
The amount of movement in the front-back direction of the nozzle is 0.1 (mm), and the discharge port 4a
The inner diameter dimension D3 of 1 is set to 0.995 (mm), and the discharge port 4a when the ball 6 is in the most retracted state
The outer diameter d2 ′ (see FIG. 3) of the ball 6 facing 1 is φ
It becomes 0.866 (mm). Therefore, the movable amount of the ball 6 in the left-right direction W is 0.089 (mm) on both sides, that is, 0.044 (mm) ≈0.4 (mm) on one side.
Further, the movable amount of the avoiding body 10 is calculated from the inner diameter dimension D of the ball house 4a and the diameter dimension d1 of the avoiding body 10 regardless of the inner diameter dimension D3 of the discharge port 4a1.

Further, these numerical values can be appropriately changed depending on the fluid used and the diameter of the ball / avoiding body used. Further, the materials of the ball 6 and the avoidance body 10 are
Cemented carbide is considered most suitable, but stainless steel or the like may be used. Further, only the avoidance body 10 may be made of hard plastic.

According to the applicator 8 of the first embodiment having the above-mentioned constitution of each part, the following effects can be obtained.

First, when the user holds the shaft body 2 and stands the applicator 8 so that the holder 4 faces downward, a part of the ball 6 is pressed against the paper surface, etc. The evasion body 10 moves rearward against the elastic force of the compression coil spring 12b until it comes into contact with the ball seat 4a2. At this time, if the ball 6 is moved while being pressed against the surface to be coated, the ball 6 rotates, but the avoidance body hardly rotates for the following reasons.

Since a fluid is present between the ball 6 and the avoidance body 10, this fluid acts as a lubricant to reduce the frictional resistance at the contact portion between the two. The contact between the spherical avoidance body 10 and the ball 6 is a point contact. Since both the ball 6 and the avoidance body 10 are spherical, they can be easily procured with high accuracy and the sphericity can be easily obtained in the manufacturing process. Therefore, the surfaces of both are formed smoothly, and the frictional resistance is further reduced.

That is, the ball 6 is
A slip occurs between the avoidance body 10 and the avoidance body 10, and the avoidance body 10 hardly rotates as shown in FIG. Therefore, the avoidance body 10 hardly wears the ball seat 4a2, and the change in the opening area of the plurality of vertical grooves 4c provided on the inner wall of the fluid guide hole 4b is reduced.

Further, as shown in FIG. 3, the avoidance body 10 and the ball 6 can move in the front-rear direction L as well as in the left-right direction W in the ball house 4a. When pressed and retracted, the avoiding body 10 is displaced from the center axis C of the ball house 4a to one side in the left-right direction W (upward facing the drawing in FIG. 3) and the inner wall of the ball house 4a. Ball seat 4
It comes into contact with a2.

Therefore, the opening surface 4b1 of the fluid guide hole 4b is not entirely blocked by the rear surface of the avoidance body 10. That is, as shown in FIG. 3, a gap S1 is formed between the opening edge 4b1 of the fluid guide hole 4b and the avoidance body 10. The gap S1 is about 0.07 (mm) in the first embodiment. Therefore, the fluid in the shaft body 2 passes through the passage of the mouth plastic 14 and between the inner wall of the holder 4 and the push rod 12a, and then enters the ball house 4a from the fluid guide hole 4b together with the vertical groove 4c. Inflow. That is, the supply of the fluid to the ball 6 and the discharge port 4a1 is
Not only the plurality of vertical grooves 4c but also the fluid guide holes 4b are provided, so that the flow state of the fluid is further improved.

The fluid flows through the clearance between the avoidance body 10 and the ball house 4a to reach the ball 6, and is discharged from the gap between the discharge port 4a1 and the ball 6 as the ball 6 rolls. At this time, a part of the ball 6 that slightly faces the ejection port 4a1 and contacts the paper surface or the like and the tip of the holder 4 serve as an application surface, and the ejected fluid is applied to the paper surface or the like. It should be noted that the shaft body 2 may be squeezed (pressed) as necessary to push the fluid in the shaft body 2 into the ball house 4a.

With the above operation, according to the first embodiment,
Even when the applicator 8 is used for a long period of time, it is possible to obtain the effect that the initially set discharge flow rate of the fluid can be favorably maintained. The urging means 12 urges the ball 6 together with the avoiding body 10 in the forward direction. As a result, the sealing property between the ball 6 and the ejection port 4a1 is improved, and the ejection port 4a1
It will be possible to securely close and open, and it is possible to prevent problems such as liquid leakage.

Since the fluid contains a pigment, a stirring ball (an example of a stirring member) 16 for stirring the fluid (see FIG. 1).
(See reference) in the shaft main body 2, even if the pigment settles and adheres to the periphery of the ball seat 4a2,
Due to the above action, the change in the opening area of the vertical groove 4c is small, and the fluid is also supplied from the fluid guide hole 4b as described above, so that the deposit can be promptly removed. Therefore, the fluid guide path is not clogged to prevent the fluid from flowing.

Even when the viscosity of the fluid is less than 30 cps and the performance of the fluid as a lubricant cannot be expected, as described above, the opening area of the vertical groove 4c due to the wear of the ball seat 4a2 is reduced. Since the change is small, the outflow of the fluid becomes good, and the decrease in the discharge amount of the fluid is suppressed.

Further, the fluid is made of, for example, a highly viscous liquid, or has an extremely high viscosity as the temperature is lowered, and the fluid guide hole 4b, the vertical groove 4c, and the ball. Even if it is difficult to naturally flow out through the clearance between 6 and the ball house 4a, the fluid can be supplied to the ball house 4a by pressing the shaft body 2. Therefore, even with an applicator using such a high-viscosity fluid, it is possible to suppress the decrease in the ejection amount due to the wear of the ball seat 4a2 and at the same time to eject the fluid easily.

Next, a second embodiment according to claim 2 will be described with reference to FIG. In the second embodiment, in the basic configuration of the first embodiment, on the rear side of the ball 6 in the ball house 4a, the diameter d1 'is smaller than the diameter d2 of the ball 6, and on the rear surface of the ball 6. A spherical avoidance body 10A that is movable in contact with the ball 6 is provided.

Further, the ball house 4a has a large diameter ball house 4a3 having an inner diameter D2 larger than the diameter d2 of the ball 6 and accommodating the ball 6, and a rear side of the large diameter ball house 4a3. The avoiding body 10 which is continuous and smaller than the inner diameter dimension D2 of the large diameter ball house 4a3
The ball house 4a4 has a small inner diameter D1 larger than the diameter d1 'of A and accommodates the avoidance body 10A. Each of the large-diameter ball house 4a3 and the small-diameter ball house 4a4 has a substantially cylindrical smooth surface.

Further, at the rear end of the small-diameter ball house 4a4, there is a ball seat 4a2 for receiving the rear portion of the avoiding body 10A when a part of the ball 6 is pressed against the surface to be coated and the ball moves backward. A fluid guide hole 4b that guides the fluid from the shaft body 2 to the ball house 4a is provided at a substantially central portion of the ball seat 4a2. A plurality of vertical grooves 4c are provided radially around the body guiding hole 4b and formed along the guiding direction of the fluid.

In the second embodiment, for example,
The diameter d2 of the ball 6 is φ1.0 (mm), the avoidance body 10A
The diameter d1 'is 0.7 (mm). Also, the inner diameter dimension D2 of the large diameter ball house 4a3 is φ1.1 (m
m), the inner diameter dimension D1 of the small diameter ball house 4a4 is φ
It is 0.85 (mm). The movable amount of the ball 6 and the avoidance body 10A in the front-rear direction L is 0.1 (mm). Further, the movable amount of the ball 6 in the left-right direction W is about 0.04 (mm) on one side as in the first embodiment, and the movable amount of the avoidance body 10A in the left-right direction is about 0.075 on one side.
(Mm). Further, the inner diameter dimension A ′ of the fluid guide hole 4b is φ0.42 (mm), and the dimension B ′ between the bottoms of the opposing vertical grooves is 0.75 (mm). Also, the ball 6
The material of the avoidance body 10A is the same as that shown in the first embodiment.

According to the second embodiment having such a structure, in addition to the same effects as the first embodiment, the ball house 4
a is a large diameter ball house 4a3 and a small diameter ball house 4
Since it is configured with a4, the movable amount of the avoiding body 10A in the left-right direction W can be adjusted by managing only the inner diameter dimension D1 of the small diameter ball house 4a4 and the diameter dimension d1 ′ of the avoiding body 10A.

For example, in the second embodiment, the movable amount in the horizontal direction W of only the avoidance body 10A is 0 on one side as described above, regardless of the movable amount in the horizontal direction of the ball 6 which affects the feeling of application. By setting it to 0.075 (mm), the avoidance body 10A is further displaced to one side in the left-right direction W (upward facing the drawing in FIG. 5) during application, and the inner wall of the small-diameter ball house 4a4 and the balls The seat 4a2 is brought into contact with the seat 4a2 so that the gap S2 shown in FIG. 5 is increased to about 0.09 (mm). As a result, the area of the opened portion of the fluid guide hole 4b (the opening of the substantially crescent shape when viewed from the front) is further increased, and the fluid can be discharged even better.

In the second embodiment, the movable amount of the avoidance body 10A in the left-right direction W is increased so that a better fluid discharge can be obtained. On the contrary, the avoidance body 10A moves in the left-right direction W. By controlling the inner diameter dimension D1 of the small-diameter ball house 4a4 and the diameter dimension d1 'of the avoidance body 10A so that the movable amount of the avoidance body 10a is reduced, the adverse effect of the excessive displacement of the avoidance body 10A in the left-right direction W is prevented. It is also possible.

According to the first and second embodiments described above, even when the fluid has a low viscosity or contains a pigment, the outer diameter of the holder 4 is not increased, It is possible to prevent the discharge amount of the fluid from lowering due to the repeated application and to discharge the fluid satisfactorily. Further, even if a fluid that is difficult to spontaneously flow out is used, it is possible to easily eject the fluid, prevent a decrease in the ejection amount of the fluid, and favorably eject the fluid. Further, the discharge port 4a1 can be surely closed / opened. Further, it does not affect the feeling of application. The first embodiment and the second embodiment are preferred embodiments of the applicator of the present invention, and the technical scope of the present invention is not limited to these embodiments.

[0065]

As described above, according to the applicator of the present invention, even when the fluid has a low viscosity or contains a pigment, the outer diameter of the holder is not increased. In addition, it is possible to suppress the decrease in the discharge amount of the fluid caused by the repeated application, and it is possible to appropriately discharge the appropriate amount of the fluid. Further, even if a fluid that is difficult to spontaneously flow out is used, the fluid can be easily discharged, at the same time, the decrease in the discharge amount of the fluid can be suppressed and the fluid can be discharged well. it can. Further, the discharge port can be opened and closed reliably, and there is no problem such as liquid leakage. Further, it does not affect the application feeling.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an applicator according to a first embodiment.

FIG. 2 is an enlarged vertical cross-sectional view of the tip end portion of the applicator according to the first embodiment, showing a state in which the discharge port is closed.

FIG. 3 is an enlarged vertical cross-sectional view of a tip end portion of the applicator according to the first embodiment, showing a state in which a discharge port is open.

FIG. 4 is an enlarged vertical cross-sectional view of the distal end portion of the applicator according to the second embodiment, showing a state in which the discharge port is closed.

FIG. 5 is an enlarged vertical cross-sectional view of the distal end portion of the applicator according to the second embodiment, showing the state in which the discharge port is open.

[Explanation of symbols]

2-axis body 4 holder 4a ball house 4a1 outlet 4a2 ball seat 4a3 Large diameter ball house 4a4 small diameter ball house 4b Fluid guide hole 4c vertical groove 6 balls 8 applicators 10 avoidance body 10A small diameter avoidance body 12 Biasing means 12a push rod 12b compression coil spring 16 Stirring balls (an example of stirring member) d1 diameter of avoider d1 'Diameter of small-diameter avoider d2 ball diameter Inner diameter of D ball house D1 Inner diameter of small diameter ball house D2 Large diameter ball house inner diameter

─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A 61-110578 (JP, A) JP-A 6-293195 (JP, A) Actually open 5-5-56868 (JP, U) Actually open 55- 24143 (JP, U) Actual development Sho 52-39228 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) A45D 34/04 B43K 1 / 08,7 / 10

Claims (4)

(57) [Claims] 1. A shaft body containing a fluid therein, a holder having a ball house provided at a tip with a discharge port through which the fluid from the shaft body flows out, and a holder rotatably in the ball house. A ball which is held and a part of which faces the outside from the discharge port to serve as a coating surface, and the ball is accommodated so as to be movable in a direction in which it comes into contact with or separates from an inner wall around the discharge port. The ejection port is closed / opened by the contact / separation, and a part of the ball is pressed against the surface to be coated to eject the fluid from the gap between the ejection port and the coating target. In the applicator for applying to a surface, the ball house is composed of a substantially cylindrical smooth surface having an inner diameter larger than the diameter of the ball, and the ball house has a diameter of the ball on the rear side of the ball house. of A spherical avoiding member having a size substantially the same as the diameter and movable in contact with the rear surface of the ball is disposed, and at the rear end of the ball house, a part of the ball is a surface to be coated. A ball seat is formed to receive the rear part of the avoiding body when the ball is moved rearward by being pressed against the ball seat, and the fluid from the shaft main body is filled with the fluid from the shaft main body at a substantially central portion of the ball seat. A fluid guide hole for guiding the fluid is provided, and the inner wall of the fluid guide hole is provided with a plurality of vertical grooves radially arranged around the fluid guide hole and formed along the guide direction of the fluid. At the same time, in the fluid guide hole,
An urging means for contacting the rear surface of the avoidance body and for urging the avoidance body and the ball forward is inserted , and the ball is pressed against the surface to be coated and retracts during application.
Then, the center of the avoidance body is from the center axis of the ball house.
The ball house inner wall and
And an applicator characterized by abutting against the ball seat . 2. A shaft main body containing a fluid therein, a holder having a ball house provided at a tip with a discharge port through which the fluid flows out from the shaft main body, and a holder rotatably in the ball house. A ball which is held and a part of which faces the outside from the discharge port to serve as a coating surface, and the ball is accommodated so as to be movable in a direction in which it comes into contact with or separates from an inner wall around the discharge port. The ejection port is closed / opened by the contact / separation, and a part of the ball is pressed against the surface to be coated to eject the fluid from the gap between the ejection port and the coating target. In the applicator for applying to a surface, a spherical avoidance body having a diameter smaller than the diameter of the ball behind the ball in the ball house and movable in contact with the rear surface of the ball together with the ball. The ball house has a large-diameter ball house having an inner diameter larger than the diameter of the ball and accommodating the ball, and is connected to the large-diameter ball house on the rear side thereof, and A small-diameter ball house having an inner diameter smaller than the inner diameter of the ball house having a diameter larger than the diameter of the avoider, and accommodating the avoider, and having the large ball house and the small diameter. Each of the ball houses is composed of a substantially cylindrical smooth surface, and at the rear end of the small diameter ball house, when a part of the balls are pressed against the surface to be coated and the balls move backward, A ball seat for receiving the rear part of the avoidance body is formed, and a fluid guide hole for guiding the fluid from the shaft body to the ball house is provided at a substantially central portion of the ball seat. The inner wall of the guide hole is provided with a plurality of vertical grooves radially arranged around the fluid guide hole and formed along the guide direction of the fluid. A biasing means that contacts the rear surface and biases the avoiding body and the ball forward is inserted , and the ball is pressed against the surface to be coated and retracts during coating.
And the center of the evasion body is left from the center axis of the ball house
The ball house inner wall and
An applicator characterized by being in contact with a ball seat . 3. The fluid body according to claim 1, wherein the fluid body contains a pigment, and a stirring member for stirring the fluid body is housed in the shaft body. Applicator. 4. The applicator according to claim 1, wherein the shaft main body is a highly flexible coating liquid tank.