JPH0952488A - Applicator - Google Patents

Abstract

(57) Abstract: In an applicator, a ball is urged straight by a coil spring with a simple structure to surely close and open a discharge port by the ball. SOLUTION: A shaft body containing a fluid, a substantially cylindrical holder 8 having a ball house 6, a holder holding means 10 provided on the shaft body, and a ball rotatably held in the ball house 6. 12 and a coil spring 14 that is inserted into the holder 8 and biases the ball 12 forward. Coil spring 14
Are arranged in the inner diameter 8a of the holder 8 and the small diameter portion 14a tightly wound through the fluid guide hole 18, the middle diameter acting portion 14b located in the inner hole 8a of the holder 8 to generate a spring force. In addition, the ball 12 is connected to the closely wound large diameter portion 14c which is guided along the inner surface of the inner hole 8a of the holder 8 while the ball 12 moves in the front-rear direction and the medium diameter acting portion 14b acts. is there.

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 is an application for applying a fluid such as a correction fluid, an aqueous / oil-based ink, or a liquid cosmetic to a surface to be coated such as a paper surface. Regarding the ingredients.

[0002]

2. Description of the Related Art For example, in Japanese Utility Model Laid-Open No. 5-58362 and Japanese Utility Model Laid-Open No. 5-76569, a shaft body (coating liquid tank) in which a fluid such as a correction fluid is contained as a coating fluid is discharged, and the fluid is discharged. A holder (chip) having a ball house having a discharge port provided at the tip, and a ball (a spherical coating body) housed in the ball house and partly exposed from the discharge port to the outside. ) Is disclosed.

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.

At the rear end of the ball house, there is formed a ball seat for receiving the rear surface of the ball when the ball is pressed against the surface to be coated and moves backward. A fluid guide hole that guides the fluid from the shaft body to the ball house is provided at a substantially central portion of the ball seat in cross section. Further, in the fluid guide hole, a movable element in which the tip of a compression coil spring (hereinafter, simply referred to as a coil spring) is formed in a rod shape or a coil spring having a small mass is placed in the holder so as to contact the rear surface of the ball, and the ball It is biased forward.

An example of the internal structure of the conventional applicator holder will be described with reference to FIG. This applicator has a holder holding means b made of resin which is press-fitted into the mouth a of the main body shaft.
The holder c is held at the front part of the holder, and the ball f urged by the coil spring e is accommodated in the ball house d at the tip of the holder c. The rear end of the coil spring e is supported by the front end of a vertical rib b1 protruding from the inner hole of the holder holding means b. A step portion b2 that is recessed rearward is formed on the inner side of the front end of the vertical rib b1. The rear end portion of the coil spring e is fitted and supported by the step portion b2. The tip of the coil spring e is machined to have an outer diameter smaller than the inner diameter of the coating liquid guide hole h so that the coil spring e is inserted into the coating liquid guide hole h formed in the ball seat g and comes into contact with the ball f. There is.

[0006]

By the way, in the conventional applicator, when a coil spring in which the movable element is integrated at the tip is used, the number of parts is reduced, but one end is formed into a rod shape, which is complicated. Since it is necessary to process the spring with a high degree of difficulty, it is disadvantageous in terms of dimensional stability, production amount per unit time, and production cost.

Further, in the coil spring e shown in FIG. 7, since the outer diameter of the small-diameter portion e1 has to be processed to be sufficiently smaller than the inner diameter of the coating liquid guide hole h, the wire diameter is φ0. It is necessary to select a wire rod of 15 mm or less. Generally, in order to secure the usability of the applicator and the sealing property of the discharge port i, the action part e2 of the coil spring e
It is desirable to set the spring force of 30 to 100 gf. Therefore, the spring force is 30 to 100 gf.
And the wire diameter of the coil spring e is φ0.1.
If it is less than 5 mm, the acting part e of the coil spring e
The outer diameter of 2 is considerably smaller than the inner diameter of the inner hole c3 of the holder c. For this reason, the coil spring e easily bends in the holder c (see FIG. 8), and the ball f may not be urged straight.

In the assembly process of the applicator, when the holder c is erected with its tip facing downward and the coil spring e is dropped into the holder c from above, the mass of the coil spring e is small and Since the outer diameter of the acting portion e2 of the spring e is small,
The tip of the coil spring e is easily caught on the back side of the ball seat g or the step c4 of the inner hole c3 of the holder c (see FIG. 9). Therefore, the ejection port i cannot be reliably closed / opened by the ball f, and the coating liquid may leak.

The present invention has been made in view of the above-mentioned problems of the prior art, and the ball is urged straight by a coil spring with a simple structure to surely close and open the discharge port by the ball. An object is to provide an applicator that can be used.

[0010]

The present invention has the following configuration to achieve the above object. That is, the invention of claim 1 is a holder having a substantially cylindrical shape having a shaft main body having a fluid contained therein, and a ball house provided at a tip thereof with a discharge port through which the fluid is discharged from the shaft main body, A holder holding means which holds the holder at a front portion and is provided at a front end portion of the shaft body, and a holder holding means which is rotatably held in the ball house and which contacts the inner wall around the discharge port in the front-back direction. The ball that closes / opens the discharge port by contact / disengagement with the ball held in the holder holding means at the rear end and inserted into the holder to directly or indirectly attach the ball to the front side. A ball spring for regulating the rearward position of the ball is provided at the rear end of the ball house, and a substantially central portion of the ball seat is provided at the rear end of the ball house. , The e In the applicator provided with a fluid guide hole for guiding the fluid from the inner hole of the dar to the ball house, the coil spring includes a small-diameter portion tightly wound through the fluid guide hole and the holder. At least one medium-diameter acting portion located in the inner hole of the holder and generating a spring force, and arranged in the inner hole of the holder, and the ball moves in the front-rear direction so that the medium-diameter acting portion acts. The applicator is characterized in that at least one large-diameter portion closely wound and guided along the inner surface of the inner hole of the holder is connected in the process.

According to a second aspect of the invention, in the applicator according to the first aspect, the spring force of the coil spring is set in the range of 30 to 100 gf in the process of the ball moving in the front-rear direction. is there.

The invention according to claim 3 is the applicator according to claim 1 or 2, wherein the mass of the coil spring is set to be larger than the mass of the ball.

According to the first aspect of the invention, when the ball is pressed against the surface to be coated and moves backward, or when the coil spring expands and contracts when the ball moves away from the surface to be coated and then moves forward, the coil spring Since the large diameter portion expands and contracts while being guided by the inner hole of the holder, the coil spring is less likely to bend in the holder. Also, when inserting the coil spring into the holder, the large diameter part falls while being guided by the inner hole of the holder, so the small diameter part of the coil spring is located on the center axis of the holder, and on the back side of the ball seat etc. Insert it straight into the application liquid guide hole without getting caught. Therefore, the coil spring always urges the ball straight forward, so that the ball can surely close and open the discharge port.

According to the second aspect of the present invention, the spring force of the coil spring is set in the range of 30 to 100 gf, so that the outer diameter of the medium diameter acting portion of the coil spring is considerably smaller than the inner hole of the holder. Even in such a case, due to the guiding action of the large diameter portion, the coil spring can be prevented from bending and the discharge port can be reliably closed and opened.

According to the third aspect of the present invention, since the coil spring having a larger mass than the ball is used, the tip of the coil spring is more unlikely to be caught on the back side of the ball seat when the coil spring is inserted.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment 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 to 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 other liquid cosmetics. It refers to an applicator using a fluid as a coating liquid.

FIG. 1 is a vertical sectional view of an applicator according to the present embodiment, and FIG. 2 is a vertical sectional view of an internal structure of a holder according to the present embodiment. 3 is a vertical cross-sectional view of the internal structure of the holder according to the first modified example of this embodiment. 4 is a vertical cross-sectional view of the internal structure of the holder according to the second modification of the present embodiment, FIG. 5 is a vertical cross-sectional view of the internal structure of the holder according to the third modification of the present embodiment, and FIG. It is a longitudinal cross-sectional view of the internal structure of the holder which concerns on the 4th modification of embodiment.

As shown in FIGS. 1 and 2, the applicator 20 of the present embodiment includes a shaft main body 2 having a fluid contained therein,
A holder 8 having a substantially cylindrical shape having a ball house 6 provided at the tip with a discharge port 4 through which the fluid from the shaft main body 2 flows out, and a holder 8 held by the front part to hold the holder 8 at the front end part of the shaft main body 2. The holder holding means 10 provided and a ball which is rotatably held in the ball house 6 and closes / opens the discharge port 4 by abutting on / off from the inner wall around the discharge port 4 in the front-rear direction. 12 and a coil spring 14 whose rear end is locked in the holder holding means 10 and which is inserted into the holder 8 to directly urge the ball 12 forward.

At the rear end of the ball house 6, there is provided a ball seat 16 which regulates the rear position of the ball 12 and receives the rear surface of the ball 12 at the time of coating, and the ball seat 16 has a substantially central portion. A fluid guide hole 18 for guiding the fluid from the inner hole 8a of the holder 8 to the ball house 6 is provided in the.

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 6 by being pressed and bent. A stirring ball 22 is housed in the shaft body 2 as needed.

As shown in FIG. 2, the holder holding means 10 has a taper shape in which the outer peripheral surface of the front portion is tapered toward the tip, and the rear end of the taper portion 10a is provided with a step portion 10b. A cylindrical portion 10c having an outer diameter smaller than the rear end of the tapered portion 10a is continuously provided. A plurality of vertical ribs 10c1 are provided on the inner peripheral surface of the cylindrical portion 10c along the central axis thereof. The holder holding means 10 is
The stepped portion 10b is press-fitted into the shaft main body 2 and assembled until it hits the front end surface of the cylindrical portion 2b of the shaft main body 2.

The holder 8 is open at both front and rear ends, and
The tip has a substantially cylindrical shape with a taper, and is pressed into the holder holding means 10 until its rear end contacts the tip of the vertical rib 10c1 of the holder holding means 10, and its front half is exposed to the outside. Holder holding means 1 in the state
Connected to 0.

As shown in FIG. 2, the ball house 6 is a hole having a circular cross section and a smooth inner surface.
A clearance is provided between the ball 12 and the ball 12 so that the fluid can flow around the ball 2. The discharge port 4 which is the tip end opening of the ball house 6 is generally called a caulking portion, and has a diameter smaller than the diameter of the ball 12 after the ball 12 is inserted into the ball house 6. It is crimped so that the ball 12
Are confined and held in the ball house 6 in a rotatable and movable state.

As shown in FIG. 2, the ball seat 16 projects inward from the inner hole 8a of the holder 8 and is a mortar-shaped slope whose inner diameter decreases toward the rear.

The fluid guide hole 18 is a hole having a circular shape in a cross sectional view. The inner wall of the fluid guide hole 18 may be provided with, for example, a plurality of vertical grooves, each of which has a concave shape at predetermined intervals in the circumferential direction of the fluid guide hole 18, at six positions.

As shown in FIG. 2, the coil spring 14 has a small diameter portion 14a which is closely wound to be inserted into the fluid guide hole 18 and a medium diameter portion which is positioned in the inner hole 8a of the holder 8 and generates a spring force. The action portion 14b and the inner hole 8a of the holder 8 are arranged, and in the process of the ball 12 moving in the front-rear direction and the medium-diameter action portion 14b acting, the holder 18
The large diameter portion 14c closely wound and guided along the inner surface of the inner hole 8a is connected.

That is, the coil spring 14 is processed so that the small diameter portion 14a, the large diameter portion 14c and the medium diameter acting portion 14b are arranged in order from the front side, and the front and rear ends of the large diameter portion 14c are closely wound. Conical part 1
4d is formed. On the rear side of the medium-diameter acting portion 14b, there is formed an end turn portion 14e whose rear end is supported by the step portion 10d at the front end of the vertical rib 10c1.

The coil spring according to the present invention is
Like the coil spring 14 in the first modification shown in FIG. 3, two large-diameter portions 14 on the front and rear sides sandwiching the intermediate-diameter acting portion 14b.
It may be provided with c. In the case of the coil spring 14 according to the first modification, the small diameter portion 14a,
Conical portion 14d, large diameter portion 14c, conical portion 14d, medium diameter acting portion 14b, conical portion 14d and large diameter portion 14
c is formed so as to be continuous, and the large diameter portion 1 on the rear side
The rear end of 4c is fitted into and supported by the step portion 10d of the vertical rib 10c1. In addition, like the second modification shown in FIG. 4,
At the rear end of the large-diameter portion 14c on the rear side shown in FIG. 3, a end-wound portion 14e having substantially the same diameter as the middle-diameter acting portion 14b is provided, and the rear end of this end-wound portion 14e is supported by the step portion 10d. You may let me. Further, as in the third modification shown in FIG. 5, the front end of the vertical rib 10c1 is formed on a flat surface without a step, and the rear end of the end-wound portion 14e shown in FIG. You may make it contact with the rear end of 8 in the state flush with.

Further, as in the fourth modification shown in FIG.
The ball house 6 of the holder 8 is extended in the front-rear direction.
The coil spring 14 shown in FIG. 2 may be used for the applicator provided with 24. In the case of the fourth modified example, the front end of the small diameter portion 14a of the coil spring 14 contacts the rear surface of the rear ball 24 to indirectly urge the ball 12 forward. The applicator shown in FIG. 6 is intended to reduce wear of the ball seat 16 by slipping the front ball 12 on the front surface of the rear ball 24 during application.

In the applicator according to the present embodiment and the first to fourth modified examples, the spring force of the coil spring 14 in the process of the ball 12 moving in the front-rear direction is 30.
The mass of the coil spring 14 is set to be larger than the mass of the ball 12 in the range of up to 100 gf.

According to the present embodiment and the first to fourth modifications having the above-mentioned configurations, when the ball 12 is pressed against the surface to be coated and retracts, or after that, the ball 12 is removed from the surface to be coated. When the coil spring 14 expands and contracts when the ball 12 moves away and moves forward, the coil spring 1
Since the large-diameter portion 14c of 4 expands and contracts while being guided by the inner hole 8a of the holder 8, the coil spring 14 is unlikely to bend in the holder 8. Also, when inserting the coil spring 14 into the holder 8, the large diameter portion 14c falls while being guided by the inner hole 8a of the holder 8, so that the small diameter portion 14a of the coil spring 14 is positioned on the central axis of the holder 8. , And is inserted into the coating liquid guide hole 18 without being caught on the back side of the ball seat 16. Therefore, the coil spring 14 urges the ball 12 straight forward, so that the discharge opening 4 is reliably closed and opened by the ball 12.

Further, by setting the spring force of the coil spring 14 in the range of 30 to 100 gf and adjusting the coil spring 14 to the usability and the sealing property of the applicator, the outer diameter of the intermediate diameter acting portion 14b is changed to the holder 8. Even if it is much smaller than the inner hole 8a of the
With the guiding action of 1, the coil spring 14 is prevented from twisting, and the discharge port 4 can be reliably closed and opened.

Further, since the coil spring 14 having a larger mass than that of the ball 12 is employed, the tip end of the coil spring 14 is less likely to be caught on the back side of the ball seat 16 or the like when the coil spring 14 is inserted.

Furthermore, since the coiling action of the large diameter portion 14c prevents the coil spring 14 from bending,
As in the third modification shown in FIG. 5, the coil spring 1
It is also possible to support the rear end of No. 4 on the flat front end face of the vertical rib 10c1. That is, conventionally, since the coil spring is largely displaced in the axial direction in the inner hole of the holder, the step portion 10d (see FIG. 6) for securely locking the rear end of the coil spring 14 is required. According to the present invention, since the coil spring 14 is located on the central axis of the inner hole 8a, it is not always necessary to provide a locking portion such as the step portion 10d on the front end surface of the vertical rib 10c1. Therefore, it is possible to reduce the manufacturing cost of the holder holding means 10.

The present embodiment and the first to fourth modifications are preferred embodiments of the present invention, and the technical scope of the present invention is not limited to this embodiment.

[0036]

As described above, according to the applicator of the present invention, the ball can be urged straight by the coil spring with a simple structure to surely close and open the discharge port by the ball. it can.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an applicator according to the present embodiment.

FIG. 2 is a vertical cross-sectional view of the internal structure of the holder according to the present embodiment.

FIG. 3 is a vertical cross-sectional view of the internal structure of a holder according to a first modified example of this embodiment.

FIG. 4 is a vertical cross-sectional view of the internal structure of a holder according to a second modified example of the present embodiment.

FIG. 5 is a vertical cross-sectional view of the internal structure of a holder according to a third modified example of the present embodiment.

FIG. 6 is a vertical cross-sectional view of the internal structure of a holder according to a fourth modified example of the present embodiment.

FIG. 7 is a vertical cross-sectional view of an internal structure of a holder according to a conventional applicator.

FIG. 8 is a vertical cross-sectional view of the internal structure of the holder according to the conventional applicator, showing the coil spring in a twisted state.

FIG. 9 is a vertical cross-sectional view of the internal structure of the holder according to the conventional applicator, showing a state in which the tip of the coil spring is hooked.

[Explanation of symbols]

 2 Shaft main body 4 Discharge port 6 Ball house 8 Holder 8a Holder inner hole 10 Holder holding means 12 Ball 14 Coil spring 14a Small diameter part 14b Medium diameter acting part 14c Large diameter part 16 Ball seat 18 Fluid guide hole

Claims (3)

[Claims] 1. A substantially cylindrical holder having a shaft body containing a fluid therein, and a ball house provided at a tip with a discharge port through which the fluid from the shaft body flows out; A holder holding means which holds a holder and is provided at a front end portion of the shaft main body, and is rotatably held in the ball house and comes into contact with and separates from an inner wall around the discharge port in the front-rear direction. By this, a ball that closes / opens the discharge port and a coil spring whose rear end is locked in the holder holding means and is inserted into the holder to directly or indirectly urge the ball forward And a ball seat for restricting a rearward position of the ball is provided at a rear end of the ball house, and the ball seat is provided at a substantially central portion of the holder. From the inner hole In the applicator provided with a fluid guide hole for guiding the fluid to the ball house, the coil spring has a small diameter portion closely wound to be inserted into the fluid guide hole and an inner hole of the holder. At least one medium-diameter acting portion that is positioned to generate a spring force, and is disposed in the inner hole of the holder, and the ball moves in the front-rear direction so that the medium-diameter acting portion acts on the holder. An applicator characterized in that at least one large-diameter portion that is closely wound and is guided along the inner surface of the inner hole is connected. 2. The spring force of the coil spring in the process of moving the ball in the front-back direction is 30 to 30.
The applicator according to claim 1, wherein the applicator is set in a range of 100 gf. 3. The applicator according to claim 1, wherein the mass of the coil spring is set to be larger than the mass of the ball.