JPH06344698A - Writing utensil - Google Patents

Abstract

PURPOSE:To provide writing utensils which can supply automatically a proper quantity of ink to a writing tip without requiring a complicated ink supply operation at all by interrupting writing during use. CONSTITUTION:An ink drain hole 63 is provided around a tip holding part 62 supporting a writing tip 4. A cylindrical valve 7 which is provided with a valve disc 71 opening or closing the ink drain hole 63 on one end and projects the other end through an end part 1a of an opening of a main body part 1 is fitted slidably freely to the outer circumference of the writing tip 4. A spring material 8 energizing the cylindrical valve 7 in the valve opening direction is loaded and a regulating device 9 regulating its quantity of movement within a specific range is provided. A pressing-in piece part 52 moving the cylindrical valve 7 in the valve opening direction in opposition to energizing force of the spring material 8 by abutting against and fitting in an end part 7a of a protrusion of the cylindrical valve 7 is provided on the inner circumferential surface of the cap 5 fitted detachably freely to the end part 1a of the opening of the main body part 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing tool of the type in which ink contained in a main body is supplied to a writing tip through an outflow control mechanism, and more specifically, it is provided with a valve body for opening and closing an ink outflow hole. The present invention relates to an improvement of a writing instrument having a valve-type ink outflow control mechanism that supplies an appropriate amount of ink to a writing tip by a valve opening operation.

[0002]

2. Description of the Related Art Conventionally, a writing instrument shown in FIG. 6 is generally known as a writing instrument having a valve type ink outflow control mechanism. Explaining this writing instrument, the hollow inside of the cylindrical main body 100 in which the cap 200 is detachably mounted on the opening end side is the ink containing portion 101, and the inside of the valve holding cylinder 300 fixed and held in the main body 100 is described. In addition to the ink outflow hole 301, a rod valve 400 equipped with a valve body 401 for opening and closing the outflow hole 301 is slidably inserted, and the rod valve 400 has a spring pressure stronger than the writing pressure at the time of writing. Load the spring material 500 that urges in the valve closing direction, and
The writing tip 600 is slidably inserted into the opening end of 0, and the rear end of the writing tip 600 is brought into contact with the rod-shaped valve 400 to form an ink outflow control mechanism.

Thus, in the normal state, the spring material 500
Due to the spring pressure, the rod-shaped valve 400 is biased toward the writing tip 600 and the valve body 401 closes the ink outflow hole 301, and ink is not supplied to the writing tip 600. When supplying ink to the writing tip 600, the writing tip 600 is pressed against the surface of the writing paper and the rod-shaped valve together with the writing tip 600 is pressed.
400 is retracted, which causes the valve body 401 to
Ink in the containing portion 101 flows out apart from 1, and is supplied to the writing tip 600.

[0004]

According to the conventional ink control mechanism as described above, it is necessary to press the writing tip 600 against the surface of the writing paper to start the ink supply at the start of writing or during the writing. Therefore, in addition to forcing the user to perform the ink supply operation, the operation for supplying the ink must be performed by interrupting the operation during writing, leaving room for improvement in terms of usability.

Since the writing tip 600 is pressed against the surface of the writing paper with a relatively large force each time the ink is supplied, the hardness of the writing tip 600 to be used is restricted, that is, the writing tip 600 is pressed against the surface of the writing paper. Since only a writing tip made of a hard material having strength and pressure resistance that does not crush when hit can be used, a writing tip made of a soft material that enables smooth writing with a soft touch cannot be used.

Further, the ink outflow hole 301 when the valve is opened
Degree of opening (separation degree of valve body 401 from ink outflow hole 301)
However, the amount of ink supply varies because it depends on the pressing force of the writing tip 600 against the surface of the writing paper.If the pressing force is weak, the ink supply work must be performed frequently. There is a possibility that the writing paper may be soiled due to ink supply and dripping.

The present invention has been made in view of such conventional circumstances, and an object thereof is to automatically apply a predetermined amount of ink without performing a troublesome operation such as pressing a writing tip against a writing paper surface. Another object of the present invention is to provide a writing instrument having an ink outflow control mechanism that can be supplied to a writing tip.

[0008]

In order to achieve the above object, the present invention provides an ink containing portion, an ink outflow control mechanism and a writing tip in a cylindrical main body, and at the opening end of the main body. A writing instrument having a cap removably attached, wherein the ink outflow control mechanism includes a tip holding portion into which a rear end of the writing tip is fitted, a valve holding cylinder fixedly held in the main body portion with an ink outflow hole, and a writing tip. A cylindrical valve that is slidably mounted on the outer periphery of the valve and has one end inserted into the valve holding cylinder to open / close the ink outflow hole and the other end protruding from the opening end of the main body; The cap is composed of a spring material that is loaded to urge the valve in the valve opening direction, and a restricting unit that restricts the amount of movement of the cylindrical valve in the valve opening direction by the spring material within a predetermined range. On the peripheral surface, Characterized by comprising providing a push piece for moving the tubular valve closing direction against the urging force of the abutting engagement spring member to the projecting end of the tubular valve in wearing condition.

[0009]

According to the above construction, when the cap is mounted on the opening end side of the main body, the pushing piece on the inner peripheral surface of the cap contacts the protruding end of the tubular valve,
The cylindrical valve moves in the valve closing direction against the biasing force of the spring material to close the ink outflow hole, and ink is not supplied to the writing tip. When the cap is removed, the urging of the tubular valve in the valve closing direction due to the contact between the pushing piece and the projecting end is released, and the tubular valve automatically moves by the urging force of the spring material. The ink is moved in the valve opening direction, and the amount of movement is restricted to a predetermined range by the restriction means to open the ink outflow hole by a predetermined amount, whereby a certain amount of ink is continuously supplied to the writing tip.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the writing instrument of the present embodiment is equipped with an ink containing portion 2, an ink outflow control mechanism 3 and a writing tip 4 in a main body portion 1, and a cap 5 is detachably attached to an opening end portion 1a of the main body portion 1. The ink is supplied to the writing chip 4 with the cap 5 removed, and the ink supply is stopped when the cap 5 is mounted.

The main body portion 1 comprises an outer pipe 11 having a tapered portion with a gradually increasing diameter on the front end side of a large-diameter cylindrical portion 11a having a thickness and an appropriate length that are easy to grasp during writing, and a rear end of the large-diameter cylindrical portion 11a. The ink tank 12a loosely inserted from the opening side comprises an inner pipe 12 integrally provided with a lid portion 12b with a flange for closing the rear end opening, and the inside of the ink tank 12a is used as an ink containing portion 2 to store a predetermined amount of ink. To house. Ink tank
The other end opening portion of 12a is a partition wall 61 of the valve holding cylinder 6 described later.
Covered by.

An ink outflow control mechanism 3 is housed in front of the ink tank 12a inside the large-diameter cylindrical portion 11a.
Writing tip 4 whose rear end is held by the control mechanism 3
Is loosely inserted into the stepped tapered portion 11b of the outer pipe 11, and its tip projects from the open end 1a of the main body 1. On the outer circumference of the stepped tapered portion 11b, a locking portion 1b for detachably holding the cap 5 to be mounted on the main body portion 1 is projected.
Further, a guide 1c for guiding sliding of a cylindrical valve 7 described later is formed on the inner circumference of the stepped tapered portion 11b.

The ink outflow control mechanism 3 includes a valve holding cylinder 6 fixedly held in the main body 1, a cylindrical valve 7 slidably mounted on the outer periphery of the writing tip 4, and the cylindrical valve 7.
Is constituted by a spring member 8 for urging the valve in the valve opening direction and a restricting means 9 for restricting the movement amount of the tubular valve 7 in the valve opening direction within a predetermined range.

The valve holding cylinder 6 has an ink tank on the rear end side.
The front end side of the outer wall of the ink tank 12a is fitted with a partition wall 61 that closes the front end opening of the ink tank 12a. The partition wall 61 is provided with a tip holding portion 62 into which the rear end of the writing tip 4 is fitted in the central portion thereof, and the holding portion 62 is provided.
A plurality of ink outflow holes 63 (three places in this embodiment) are formed so as to surround the. A step portion 64 for loading the spring material 8 is formed on the outer periphery of the front end of the valve holding cylinder 6, and an elongated hole 9a constituting the regulating means 9 is formed on the peripheral wall thereof.

The tubular valve 7 has one end side loosely inserted into the valve holding cylinder 6 and the other end side loosely inserted into the stepped tapered portion 11b, and the other end side (protruding end portion 7a) of the main body portion 1 is inserted. The valve body 71 is slidably mounted in the outer pipe 11 in a state of protruding from the opening end 1a of the above, and the above-described ink outflow hole 63 is openably and closably closed at the outer periphery of the end inserted into the valve holding cylinder 6. Are fitted together and attached. Further, on the outer circumference of the tubular valve 7, a flange portion 72 is provided so as to face the step portion 64 formed on the outer circumference of the front end of the valve holding cylinder 6. A spring material 8 is loaded between the collar portion 72 and the stepped portion 64 so that the tubular valve 7 is attached to the opening end portion of the main body portion 1.
Energize in 1a direction (valve opening direction).

A protrusion 73 slidably inserted into the long hole 9a is formed at a position of the cylindrical valve 7 facing the above-mentioned long hole 9a. A regulation unit 9 is configured to regulate the movement amount of the cylindrical valve 7 in the valve opening direction within a predetermined range. According to the regulating means 9, the distance between the valve body 71 and the ink outflow hole 63 when the cylindrical valve 7 is moved in the valve opening direction by the urging force of the spring member 8, that is, the opening degree of the ink outflow hole 63. Is regulated to a predetermined amount, and the ink outflow amount from the ink outflow hole 63 is controlled to be constant so that stable ink supply is always performed.

The writing tip 4 is made of a porous material, a fibrous material or the like which is usually used in the technical field of this kind, and is hard or soft. The rear end of the writing tip 4 is fitted into the tip holding portion 62 and the tip end thereof is inserted. The side is the open end 1a of the main body 1.
It is supported in the cylindrical valve 7 in a loosely inserted manner so as to project from the above by an appropriate amount. Then, the ink supplied from the ink outflow hole 63 is impregnated and held inside, and is guided to the tip end direction by the capillary action and transferred to the writing paper surface.

The cap 5 is formed into a bottomed cylindrical shape that can be externally fitted and mounted on the opening end 1a side of the main body 1, and is elastically attached to the inner peripheral surface near the opening so as to be engageable with and disengageable from the locking portion 1b. A ridge portion 51 that engages with each other. Further, the inner bottom portion abuts and engages with the projecting end portion 7a of the tubular valve 7 in a state of being attached to the main body portion 1, and resists the biasing force of the spring member 8 to close the tubular valve 7 in the valve closing direction. A pushing piece portion 52 for moving is provided.

The spring member 8 resists the pushing force of the pushing piece portion 52 (the fastening force by the engagement of the engaging portion 1b and the protruding portion 51) when the cap 5 is attached. When the tubular valve 7 moves toward the ink containing portion 2 and the valve body 71 reliably blocks the ink outflow hole 63, and the cap 5 is removed, the tubular valve 7 can be moved by a predetermined amount in the valve opening direction. It is sufficient if it has a certain degree of spring pressure.

According to the writing instrument of the present embodiment constructed as described above, when the cap 5 is mounted on the opening end 1a side of the main body 1, the inner periphery of the cap 5 is attached to the protruding end 7a of the tubular valve 7. When the pushing piece 52 of the surface comes into contact, the cylindrical valve 7 moves in the valve closing direction against the biasing force of the spring member 8 to close the ink outflow hole 63, and the ink is supplied to the writing tip 4. No (see Figure 1).

When the cap 5 is removed, the urging of the tubular valve 7 in the valve closing direction due to the contact between the pushing piece 52 and the projecting end 7a is released, and the tubular valve 7 springs. The urging force of the material 8 automatically moves in the valve opening direction, and the movement amount thereof is regulated within a predetermined range by the regulation means 9 to open the ink outflow hole 63 by a predetermined amount.
A constant amount of ink is continuously supplied to the ink (see FIG. 5).

Therefore, there is no need to carry out a troublesome operation such as running out of ink during writing or interrupting the writing and pressing the writing chip 4 against the surface of the writing paper to supply the ink, and excessive ink supply can be achieved. It is possible to obtain a very good feeling of use without any fear that the writing paper is soiled due to fluffing or the like.

[0023]

Since the writing instrument of the present invention is constructed as described above, it has the following effects. If the cap is removed before use, the ink supply stopped state due to the cylindrical valve is automatically released, and ink is continuously supplied to the writing tip. Therefore, unlike a conventional writing instrument, a troublesome operation of supplying ink by interrupting writing during use is not required at all, and an extremely good usability can be obtained.

In addition, the writing tip is supported by the valve holding cylinder fixedly held in the main body, and the cylindrical valve and the spring member for urging the valve in the opening direction do not receive any writing pressure at the time of writing. In addition, since the movement amount of the tubular valve in the valve opening direction is regulated within a predetermined range by the regulation means, a fixed amount (appropriate amount) of ink is always written without being influenced by the writing pressure degree which is different depending on the user. Can be supplied to the chip. Therefore, stable writing can be expected without soiling the writing paper due to dripping due to excessive ink supply, and the effect of improving the above-mentioned feeling of use becomes more effective.

Furthermore, since there is no need to press the writing tip against the surface of the writing paper with a pressing force larger than the writing pressure, there is no restriction on the hardness of the writing tip to be used, and for example, a hard marker such as a marker is used. A wide range of applications are possible, from those equipped with flexible writing chips to those equipped with soft writing chips such as brush pens.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional front view showing an example of implementation of a writing instrument of the present invention.

FIG. 2 is an enlarged sectional view taken along line (II)-(II) of FIG.

FIG. 3 is an enlarged sectional view taken along line (III)-(III) of FIG.

FIG. 4 is an enlarged cross-sectional view taken along line (IV)-(IV) of FIG.

FIG. 5 is a vertical sectional front view showing a usage state.

FIG. 6 is a vertical sectional front view showing a main part of a conventional writing instrument.

[Explanation of symbols]

1: Main body part 1a: Opening end part 2: Ink storage part 3: Ink outflow control mechanism 4: Writing tip
5: Cap 52: Pushing piece part 6: Valve holding cylinder 62: Tip holding part 63: Ink outflow hole 7: Cylindrical valve 7a: Projection end 71: Valve body 8: Spring material 9: Restriction means

Claims (1)

[Claims] 1. A writing instrument comprising a cylindrical main body, which is equipped with an ink containing portion, an ink outflow control mechanism, a writing tip, and a cap which is detachably attached to an opening end of the main body. The mechanism is equipped with a tip holding part into which the rear end of the writing tip is fitted and a valve holding tube that is fixedly held in the main body with an ink outflow hole, and a slidably mounted outer periphery of the writing tip with one end inside the valve holding tube. A cylindrical valve that is inserted to open / close the ink outflow hole and project the other end from the opening end of the main body, and a spring material that is loaded to urge the cylindrical valve in the valve opening direction. And a restriction means for restricting a movement amount of the tubular valve in the valve opening direction by the spring material within a predetermined range. Abutting engagement with the protruding end of A writing instrument characterized by comprising a pushing piece portion for moving the tubular valve in the valve closing direction against the biasing force of the spring material.