JPH09141181A - Valve device in writing utensil or application utensil for liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quantitatively supply a liquid to a writing utensil, application utensil, etc., by one time valve opening operation and, at the same time, to narrow the outer diameter size of a valve device in a writing utensil and an application utensil for liquid. SOLUTION: In a valve device 10 of a liquid type writing utensil, etc., a first seal projection 6b, which is in contact with and slides on the outer circumference of a valve stem 4 in the front position of an outer flange part 4a during the period in which the outer flange part 4a is parted from a valve aperture 6a and the valve stem 4 is retreated by a prescribed degree A, in the inner circumference of a valve seat and a step 4b to discharge a liquid by forming a space to the first seal projection 6b after the valve stem 4 which retreats by the prescribed degree A is further retreated, is formed in the outer circumference in the front part of the valve stem 4. Moreover, a second seal projection 2a, which is in contact with and slides on the outer circumference of the valve stem 4 after the outer flange part 4a is parted from the valve aperture 6a, is installed in the inner circumference of an open part in the rear end of a spring seat 2 and, at the same time, at least one leading groove 4c to lead a liquid to the inside of the spring seat 2 in the condition that at least the outer flange part 4a is brought into contact with the valve aperture 6a is formed in the rear part of the valve stem 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device mounted on an instrument for writing or applying a liquid such as ink, liquid cosmetics, paints, liquid pharmaceuticals, and adhesives.

[0002]

2. Description of the Related Art A conventional valve device of this type is a substantially cylindrical spring receiver fitted in the mouth of a main body shaft of a writing instrument, a valve rod movably disposed in the spring receiver, and a valve of this valve. It is mainly composed of a valve spring incorporated in the spring receiver so as to bias the rod forward, and a valve seat fitted in the front end opening of the spring receiver to contact / disengage the valve rod, At the time of valve opening when the valve rod separates from the valve seat, an indeterminate amount of liquid material corresponding to the opening time is discharged and supplied to the writing or application section. Therefore, for example, due to the length of the knocking operation time for opening the valve, there is a possibility that the amount of impregnation in the writing or application portion may become excessive or deficient and the liquid material may drip, or wiping may occur on the writing or application surface. It was

Accordingly, the applicant of the present invention has a fairness of 6-217.
In the valve device described in Japanese Patent Publication No. 45-45, in the valve opening operation, even after the piston blade portion provided on the valve rod separates from the valve opening of the valve seat, the piston blade portion is brought into close contact with the spring receiving inner circumference, The rear part of the spring retainer is brought into close contact with the seal protrusion of the spring retainer to seal the inside of the spring retainer so that when the valve rod is further retracted, the piston vanes are separated from the inner periphery of the valve seat, thereby writing or measuring a fixed amount of liquid. It can be supplied to the coating section.

[0004]

However, in the valve device disclosed in Japanese Utility Model Publication No. 6-21745, the seal between the valve rod and the valve seat after the piston blade portion is separated from the valve opening is provided outside the piston blade portion. Since the operation is performed at the peripheral edge, the outer diameter of the valve device becomes large due to the piston blade portion having a large outer diameter, and there is a problem that it is difficult to use for a slender type writing instrument or the like.

Further, the liquid material is in the valve device (in the spring receiver).
Since it is introduced at the inner periphery of the rear end opening of the spring receiver, when designing a slim type writing instrument or setting the outer diameter of the valve device to a small value, the rear end opening of the spring receiver is Since the inner diameter is small, the introduction path becomes narrow, and it becomes difficult to properly introduce the liquid material into the valve device.

The present invention has been made in view of the above-mentioned conventional problems, and supplies a fixed amount of liquid material to a writing or coating portion by one valve opening operation and reduces the outer diameter of the device. An object of the present invention is to provide a valve device for a liquid writing instrument or an application instrument that can be set.

[0007]

The present invention has the following configuration to achieve the above object. That is, the invention of claim 1 is a valve rod having a spring receiver having only a front end and a rear end opened, and a spring retainer that is movably incorporated in the spring receiver in the front-rear direction and has a radially protruding outer collar portion on the outer periphery. When,
A valve seat having a valve opening with which an outer flange portion of the valve stem comes into contact with and disengages from, and a valve seat fitted from a front end opening of the spring bearing, and a valve seat incorporated in the spring bearing to urge the valve rod forward. In a valve device of a liquid writing instrument or an applicator including a valve spring, the outer collar portion is disengaged from the valve opening and the valve rod is retracted by a predetermined amount on the inner periphery of the valve seat. Up to the outer flange portion, a first seal protrusion that slides on the outer periphery of the valve rod is provided at a position in front of the outer collar portion, and the valve rod retracted by the predetermined amount further retracts on the outer periphery of the front portion of the valve rod. After that, a gap is formed between the first seal projection and a step portion that discharges the liquid material in the spring receiver forward, and the outer periphery is formed on the inner periphery of the rear end opening of the spring receiver. A second seal projection is provided that is in sliding contact with the outer periphery of the valve rod after the collar portion is separated from the valve opening, At the rear portion of the valve rod, at least one introduction groove for introducing a liquid material into the spring receiver in a state where at least the outer collar portion is in contact with the valve opening is provided. Valve device for body writing instruments or applicators.

According to a second aspect of the present invention, the liquid material according to the first aspect is characterized in that one or more splits are provided in a rear portion of the rear end opening of the spring bearing with respect to the second seal projection. Is a valve device in a writing instrument or a coating instrument.

According to the first aspect of the present invention, when the valve rod is retracted by, for example, a knocking operation or the like, the outer flange portion is separated from the valve port to open the valve port, but the valve rod is retracted by the predetermined amount. Since the first seal protrusion is in sliding contact with the outer periphery of the valve rod, the liquid is not discharged from the spring receiver through the valve port. At the same time, when the valve rod retracts, the second seal projection slides on the outer periphery of the valve rod, so that the liquid material is not introduced into the spring receiver through the rear end opening of the spring receiver. Therefore, the fixed amount of liquid material in the spring receiver is sealed by the first seal protrusion and the second seal protrusion. When the valve rod is further retracted from this state and the movement thereof reaches a predetermined amount, the stepped portion forms a gap between the stepped portion and the first seal projection, and therefore the fixed amount sealed in the spring receiver through this gap. The liquid material is discharged forward.

As described above, according to the first aspect of the present invention, a fixed amount of liquid can be discharged by the first seal projection provided on the inner circumference of the spring receiver and the stepped portion provided on the outer circumference of the valve rod. Therefore, the outer diameter of the valve device does not become large in order to supply a fixed amount of the liquid material to the writing or coating portion. That is, it is not necessary to provide a piston blade portion on the valve rod as in the conventional case, and the maximum diameter of the valve rod and the outer diameter of the valve device can be set small. Therefore,
A valve device that can discharge a fixed amount of liquid material can also be used for a slim type writing instrument or the like. Further, since there is no conventional piston blade portion, when the outer diameter of the device is the same, the internal volume of the valve device, that is, the amount of liquid material sealed in the spring receiver, is increased compared to the conventional device. can do.

When the valve rod is released from the knock pressure after the valve opening operation, the valve rod is moved forward by the urging force of the valve spring so that the outer flange portion of the valve rod comes into contact with the valve port to open the valve port. Close up.
In this state, the liquid material is introduced into the spring receiver by the introduction groove provided in the rear portion of the valve rod, and the state is awaited for the next valve opening operation.

According to the second aspect of the invention, when the liquid material is introduced into the spring receiver by the introduction groove, the liquid is favorably liquefied in the introduction groove through the split provided in the rear end opening of the spring receiver. The body begins to flow. Therefore, when the present valve device is adopted for a writing instrument such as a slim type writing instrument or a writing instrument that suppresses the discharge amount of the liquid, even if the inner peripheral diameter of the rear end opening of the spring receiver becomes small, the spring A liquid material can be introduced into the receiver.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a one-sided cross-sectional view of the valve device according to the present embodiment, showing a non-knock operation state. FIG. 2 is a sectional view taken along the line II-II in FIG. FIG.
FIG. 6 is a one-sided cross-sectional view of the valve device of the present embodiment, showing a state in which the valve rod is retracting by a predetermined amount in the knocking operation process. FIG. 4 is a one-sided cross-sectional view of the valve device according to the present embodiment, showing the state after the valve rod has retracted by a predetermined amount in the knocking operation process. FIG. 5 is a one-sided sectional view of a valve device of a comparative example according to the present embodiment.

In this embodiment, as shown in FIG. 1, a spring bridge 2 having only a front end and a rear end opened, and a spring collar 2 which is movably incorporated in the spring bridge 2 in the front-rear direction and protrudes in a radial direction. A valve rod 4 having a portion 4a on the outer periphery, a valve opening 6a with which the outer collar 4a of the valve rod 4 abuts and departs, and a valve seat 6 fitted from the front end opening of the spring bearing 2; A valve device 10 in a liquid writing instrument or a coating instrument including a valve spring 8 that is incorporated in the valve 2 and biases the valve rod 4 forward.

Further, on the inner periphery of the valve seat 6, the valve rod 4 is located at a position in front of the outer flange portion 4a until the outer collar portion 4a is separated from the valve opening 6a and the valve rod 4 is retracted by a predetermined amount A. 4 is provided with a first seal protrusion 6b which is slidably contacted with the outer periphery of the valve rod 4, and a gap is formed between the first seal protrusion 6b on the outer periphery of the front portion of the valve rod 4 after the valve rod 4 retracted by a predetermined amount A further retracts. A step portion 4b is formed to discharge the liquid material in the spring receiver 2 to the front, and an outer collar portion 4a is provided on the inner periphery of the rear end opening of the spring receiver 2 with a valve opening 6a.
A second seal projection 2a that slides on the outer periphery of the valve rod 4 after being separated from the valve rod 4 is provided, and at the rear portion of the valve rod 4, at least the outer collar portion 4a is in contact with the valve opening 6a, the liquid material is spring-loaded. One or more introduction grooves 4c for introducing into 6 are provided. Further, one or more splits 2b are provided in a portion of the rear end opening of the spring receiver 2 that is behind the second seal projection 2a.

The structure of each unit will be described in detail below. As shown in FIG. 1, the spring receiver 2 is fitted into the mouth of a main body shaft (not shown) of a writing instrument or the like, has a substantially cylindrical shape, and is provided with a collar 2c on the outer periphery of the front end and a rear end. The portion has a small-diameter protruding portion 2d. An introduction hole 2f for introducing the liquid material into the spring receiver 2 is formed from the rear end of the small-diameter protruding portion 2d to the internal space 2e of the spring receiver 2. The second seal projection 2a is located forward of the projecting portion 2d and is formed integrally with the inner circumference of the front end of the introduction hole 2f over the entire circumference, and its cross-sectional shape is a gentle mountain shape. As shown in FIG. 2, the protrusion 2d is provided with the splits 2b at intervals of about 90 degrees.

The valve rod 4 has a small-diameter portion 4 as shown in FIG.
d, the step portion 4b, the medium diameter portion 4e, the outer collar portion 4a, the large diameter portion 4f, and the tail end portion 4g are integrally formed in succession from the front side. The step portion 4b is formed so as to expand from the rear end of the cylindrical small diameter portion 4d toward the rear and has a tapered shape. The predetermined amount A is measured from the rear end position of the step portion 4b in the valve closed state to the first seal projection 6b.
Set by the distance to. The outer collar portion 4a is the middle diameter portion 4
e It has a tapered shape in which the diameter increases from the rear end toward the rear. The tail end portion 4g is formed in a cylindrical body having an outer diameter smaller than the inner diameter of the second seal protrusion 2a along the axial direction of the introduction grooves 4c (see FIG. 2) having a V-shaped cross section at intervals of about 120 degrees. It is formed, and its rear end is sharpened rearward. Further, in the state shown in FIG. 1, a distance B shorter than the predetermined amount A is set between the rear end position of the large diameter portion 4f and the second seal projection 2a. Also, the large diameter portion 4f
The outer diameter of the first seal projection 2a is set to be approximately the same as the inner diameter of the first seal projection 2a. Functionally speaking, when the valve rod 4 is retracted by a distance B or more, the outer circumference of the large diameter portion 4f and the second seal projection are The dimension is set to such an extent that it can be in close contact with 2a.

The valve seat 6 has a generally cylindrical shape with both front and rear ends open, and a flange 6c is formed integrally with the flange 2c of the spring support 2 from the front side at the rear end thereof. A wide inner flange 6d is integrally provided on the inner periphery of the rear portion of the valve seat 6, and the front end peripheral edge of the inner flange 6d is the valve opening 6
The first seal projection 6b is provided at the center of the inner flange 6d in the front-rear direction while functioning as a. First
The seal protrusion 6b is integrally formed over the entire circumference and has substantially the same shape as the second seal protrusion 2a. The inner diameter of the first seal projection 6b is set to be substantially the same as the outer diameter of the middle diameter portion 4e of the valve rod 4, and functionally speaking, the middle diameter portion is retracted in the process of retracting the valve rod 4 by a predetermined amount A. The size is set so as to be close to 4e.

The valve spring 8 has its front end abutting on the rear end of the outer flange portion 4a, while its rear end is supported on the front surface of the rear wall of the spring receiver 2, and the taper surface of the outer flange portion 4a is the valve. It is a compression coil spring that constantly urges the valve rod 4 forward so as to contact the mouth 6a. In the drawings, a pen core or the like as a writing or coating portion is not shown, but the pen core or the like is connected to the front portion of the valve rod 4 by fitting or abutting, and the pen core or the like is attached to the surface to be coated. By pushing and knocking, the valve rod 4 can be retracted against the biasing force of the valve spring 8.

Next, the operation of the present embodiment having the above structure will be described with reference to FIGS. 1, 3 and 4. In a normal state, that is, in a state where the knock pressure by the user is not applied to the valve rod 4, as shown in FIG. 1, the outer collar portion 4a is in contact with and closely adheres to the valve opening 6a by the valve spring 8, and the valve is It's closed. Further, in this state, the second seal projection 2a faces the tail end portion 4f of the valve rod 4, so that the internal space 2e of the spring receiver 2 is inserted into the tank of the main body shaft of a writing instrument or the like via the introduction groove 4c. (Not shown) and the like are communicated with it, so that a liquid material such as ink can be introduced from the tank or the like into the internal space 2e of the spring receiver 2.

From the valve closed state shown in FIG. 1, when the valve rod 4 is retracted by, for example, a knocking operation or the like, the outer collar portion 4a is separated from the valve opening 6a to open the valve opening 6a, but the valve rod 4 has a predetermined amount A. Until it retracts, the first seal projection 6b is in close contact with the outer circumference of the medium diameter portion 4e of the valve rod 4 so that the liquid is not discharged from the spring receiver 2 through the valve opening 6a. (See Figure 3). At the same time, when the valve rod 4 retracts by a distance B or more, the second seal projection 2a comes into sliding contact with the outer circumference of the large-diameter portion 4f of the valve rod 4 as shown in FIG.
The liquid material is not introduced into the inside of the spring receiver 2 through the rear end opening, that is, the introduction hole 2f.
A fixed amount of liquid material corresponding to the internal volume of the internal space 2e is sealed inside by the first seal protrusion 6b and the second seal protrusion 2a.

When the valve rod 4 is further retracted from this state and the amount of movement thereof reaches the predetermined amount A, as shown in FIG. 4, the step portion 4b and the small diameter portion 4d are located between the first seal projection 6b. Since a gap is formed, a fixed amount of liquid material sealed in the spring receiver 2 is discharged forward through this gap.

As described above, in the valve device 10 of the present embodiment, the fixed amount of liquid material is provided by the first seal projection 6b provided on the inner circumference of the valve seat 6 and the step portion 4b provided on the outer circumference of the valve rod 4. Therefore, the outer diameter of the valve device does not increase in order to supply a fixed amount of the liquid material to the writing or coating portion. That is, it is not necessary to provide the conventional piston blade portion on the outer collar portion 4a of the valve rod 4, and the maximum diameter of the valve rod 4 and the outer diameter of the valve device 10 can be set small. Therefore, this valve device 1
0 can also be adopted for a slender type writing instrument. Also, since there is no conventional piston blade part,
When the outer diameter of the device is the same, the inner volume of the valve device 10, that is, the amount of the liquid material sealed in the spring receiver 2 can be increased as compared with the conventional device.

When the valve rod 4 is released from the knock pressure after the valve opening operation, the urging force of the valve spring 8 causes the valve rod 4 to move.
Moves forward and its outer flange 4a comes into contact with the valve opening 6a so that the valve opening 6a
Block a. In this state, the liquid material is introduced into the spring receiver 2 by the introduction groove 4c provided in the rear portion of the valve rod 4, and the state is in a state of waiting for the next valve opening operation.

Further, according to this embodiment, when the liquid material is introduced into the spring receiver 2 by the introduction groove 4c, the liquid material can be favorably introduced into the introduction groove 4c through the split 2b provided in the protruding portion 2d of the spring receiver 2. Comes to flow. Therefore, when the present valve device 10 is used for a writing instrument such as a slim type writing instrument or a writing instrument in which the discharge amount of the liquid material is suppressed, even if the inner peripheral diameter of the introduction hole 2f becomes small, the spring receiving member 2 can be well accommodated. A liquid material can be introduced. On the other hand, as shown in FIG. 5, when only the structure of the invention according to claim 1 is adopted and the split according to claim 2 is not provided in a slender type writing instrument, the introduction hole 2f has a very small diameter. Therefore, it may be difficult to introduce the liquid material into the spring receiver 2. However, depending on the properties of the liquid material required for the writing instrument, the shaft diameter, etc.
It is not always necessary to provide b.

This embodiment is a preferred embodiment of the present invention, and the technical scope of the present invention is not limited to this embodiment.

[0027]

As described above, according to the present invention, in a valve device for a writing tool or a coating tool for a liquid material, a fixed amount of the liquid material is supplied to the writing or coating portion by one valve opening operation. At the same time, the outer diameter of the device can be set small. In addition, even when the present valve device is used in a slender type writing instrument or the like, the liquid material can be satisfactorily introduced into the spring receiver.

[Brief description of the drawings]

FIG. 1 is a one-sided cross-sectional view of a valve device according to an embodiment, showing a non-knocking operation state.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a one-sided cross-sectional view of the valve device of the present embodiment, showing a state in which the valve rod is retracting a predetermined amount in the knocking operation process.

FIG. 4 is a one-sided cross-sectional view of the valve device according to the present embodiment, showing a state after the valve rod retracts by a predetermined amount in the knocking operation process.

FIG. 5 is a one-sided sectional view of a valve device of a comparative example according to the present embodiment.

[Explanation of symbols]

 2 spring receiving 2a second sealing projection 2b split 2f introduction hole (corresponding to rear end opening of spring receiving) 4 valve rod 4a outer flange 4b step 4c introduction groove 6 valve seat 6a valve opening 6b first sealing projection 8 Valve spring 10 Valve device A Predetermined amount

Claims (2)

[Claims] 1. A spring retainer having only a front end and a rear end opened, a valve rod that is movably incorporated in the spring retainer in the front-rear direction, and has an outer flange portion that protrudes in a radial direction on the outer periphery.
A valve seat having a valve opening with which an outer flange portion of the valve stem comes into contact with and disengages from, and a valve seat fitted from a front end opening of the spring bearing, and a valve seat incorporated in the spring bearing to urge the valve rod forward. In a valve device of a liquid writing instrument or a coating instrument including a valve spring, the outer collar portion is disengaged from the valve opening and the valve stem is retracted by a predetermined amount on the inner periphery of the valve seat. Up to the outer flange portion, a first seal projection that slides in contact with the outer periphery of the valve rod is provided at a position further forward than the outer flange portion, and the valve rod retracted by the predetermined amount further retracts on the outer periphery of the front portion of the valve rod. After that, a gap is formed between the first seal projection and a step portion that discharges the liquid material in the spring receiver forward, and the outer periphery is formed on the inner periphery of the rear end opening of the spring receiver. A second seal protrusion is provided which is in sliding contact with the outer periphery of the valve rod after the collar portion is separated from the valve opening. At the rear portion of the valve rod, at least one introduction groove for introducing a liquid material into the spring receiver in a state where at least the outer collar portion is in contact with the valve opening is provided. Valve device for body writing instruments or applicators. 2. The liquid writing instrument according to claim 1, wherein one or more splits are provided in a portion of the rear end opening of the spring bearing behind the second seal projection. Valve device for coating equipment.