JPH06328893A - Cap for writing utensil - Google Patents

Abstract

PURPOSE:To supply ink from an ink storage chamber to a pen body side in a state covered with a cap at the time of starting writing. CONSTITUTION:A top plate 2 of a cap body 1 of a writing instrument in which a holder 16 of a pen body 15 is axially and slidably provided at an end of a pen shaft having an ink storage chamber 13 and the body 16 is reciprocating to supply ink in the chamber to the body 15 through an ink supply control member 17 is reciprocated via a spring 5, and the plate 2 is operated by a fingertip in the state covered with the cap to supply a predetermined amount of ink to the body 15 by reciprocating the body 15 by the plate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a cap of a writing instrument which supplies a fixed amount of ink in a pen shaft by reciprocating the pen body.

[0002]

2. Description of the Related Art Conventionally, for example, a writing instrument such as a whiteboard marker using an ink such as a quick-drying alcohol-based ink is provided with a pen body at the tip of a pen shaft so as to be reciprocally movable in the axial direction. When the pen body is operated, a certain amount of ink is supplied to the pen body side from an ink storage chamber formed in the pen shaft through a pump mechanism that operates integrally with the pen body.

In such a writing instrument, the pen body and the ink storage chamber are completely cut off when not in use, and even if a felt tip is used as the pen body, the ink penetrating into the felt tip is It dries during non-use and scratches occur at the start of writing. For this reason, the writer, after removing the cap at the time of use, presses the pen body against the writing surface such as a whiteboard many times, and reciprocally operates the pen body to remove the ink from the ink storage chamber through the pump mechanism. Writing is started after the ink is supplied to the pen body and the state where blurring does not occur.

[0004]

However, at the start of writing, if the pen body is directly pressed against the writing surface such as a whiteboard as described above many times, not only the writing surface becomes dirty and it takes time to wipe it off. Since the pressing force tends to be larger than the writing pressure during normal writing, the pen body may be damaged. Also, when the writing surface cannot be wiped off like the paper surface, the pen body is pressed against the fingertip or an article near it.
There is a problem that the ink is contaminated.

The present invention has been made in view of the above problems, and at the start of writing, the pen body is operated without directly pressing it against the writing surface to supply ink from the ink storage chamber to the pen body and smoothly. The present invention provides a cap for a writing instrument, which is intended to enable the start of simple writing.

[0006]

In order to achieve the above object, the cap of the writing instrument of the present invention has a pen body which is provided with an ink supply control member at the tip of a pen shaft having an ink storage chamber therein. In the writing instrument which is arranged so as to be movable in any direction, and the ink in the ink storage chamber is supplied to the pen body side by opening and closing the ink supply control member by reciprocating movement of the pen body, the structure of the cap is The top plate of the cap body is separated from the cap body, and the top plate is reciprocally movable against the spring force disposed in the cap body, and the pen body is reciprocated by the reciprocating motion of the top plate. Is configured as follows.

In the cap structure constructed as described above, in the invention described in claim 2, the short cylinder portion is provided so as to project from the inner surface of the top plate of the cap body, and the opening end of the short cylinder portion is formed into the top plate. In the invention described in claim 3, the inner surface of the top plate of the cap main body at a small distance from the tip of the pen body is attached to the inner surface of the top plate of the cap body. The top plate is configured to be directly pressed against the tip of the pen when the top plate moves forward. In addition, in such a configuration,
As described in claim 3, it is desirable to dispose the top plate of the cap body inward from the tip of the cap body.

[0008]

[Operation] When using a writing instrument, when the cap is attached and the top plate of the cap body is pressed inward against the spring and moved, the pen body moves to the ink storage chamber side by the pressing force and supplies ink. Open the control member. Further, when the pressing force on the top plate is released, the pen body returns to the original position and the ink supply control member is closed. When this operation is performed several times, a sufficient amount of ink for writing is supplied to the pen body side from the ink storage chamber through the ink supply control member. After that, remove the cap and write on the writing surface such as a whiteboard.

As a specific structure for reciprocating the pen body in conjunction with the reciprocating movement of the top plate of the cap body, as described in claim 2, the top plate surrounds the periphery of the pen body. Alternatively, the short cylinder portion may be provided so as to project, and the open end of the short cylinder portion may be pressed against the holder of the pen body. Further, as described in claim 3, the inner surface of the top plate may be Alternatively, the pen body may be directly pressed against the tip of the pen body. It should be noted that if the top plate is slightly retracted inward from the opening at the tip of the cap body, the top plate can be protected by the opening end of the cap, and the top plate will operate unexpectedly when not in use. Can be prevented.

[0010]

Embodiments of the present invention will now be described with reference to the drawings, in which reference numeral 1 denotes a cylindrical synthetic resin cap body detachably fitted to the tip of a writing instrument 11 and having openings 1a and 1b at both ends. An opening 1b on the end side is formed as an insertion opening for the writing instrument 11, and a disk-shaped top plate 2 formed separately from the cap body 1 is arranged on the side of the opening 1a on the tip side. Further, a ring-shaped fixed spring seat 4 is integrally provided around a portion of the inner peripheral surface of the cap body 1 near the tip opening 1b.

On the inner surface of the top plate 2 (the surface on the writing instrument side),
A short tube portion 3 of an appropriate length inserted into the cap body 1 is provided in a protruding manner, and both ends of the short tube portion 3 are formed in large diameter portions 3a and 3b which are in sliding contact with the inner peripheral surface of the cap body 1. The end surface 3c of the large-diameter portion 3b on the protruding end side is formed on the pressing surface against the pen body holder 16 described later. Further, the short tubular portion 3 is slidably inserted into the spring seat 4 and the large diameter portion on the protruding end side thereof.
3b can be locked to the spring seat 4, and a coil spring 5 is arranged in a gap between the operating cylinder portion 3 and the inner peripheral surface of the cap body 1. The large-diameter portion 3a and the spring seat 4 are respectively received, and the elastic force of the coil spring 5 causes the large-diameter portion 3b to be in close contact with the spring seat 4 in a normal state to be airtight. Holds sex.

As shown in FIG. 2, the writing instrument 11 fitted with the cap thus constructed has an ink storage chamber 13 in which an alcohol-based quick-drying ink is filled in a cylindrical pen shaft 12. And a pen body holder 16 having a pen body 15 formed of a felt tip projectingly formed on the small diameter portion 14 is formed with a tip end portion on which the cap body 1 is detachably fitted. It is movably inserted. Further, between the ink storage chamber 13 and the pen body holder 16,
That is, the ink supply control member 17 is disposed in the base end portion of the small diameter portion 14, and the ink storage chamber 13 is disposed in the base portion of the pen shaft 12.
A plug body 19 for partitioning the air chamber 18 and the air chamber 18 is slidably arranged in the axial direction, and has a structure in which the air chamber 18 communicates with the outside air through an air hole 20 provided in the base end surface of the pen shaft 12. is doing. The ink is not limited to alcohol-based ink, and any ink such as water-based or oil-based ink may be used.

The ink supply control member 17 is composed of a diaphragm plate 22 having a cross-shaped slit 21 which is normally closed in the central portion, and the outer peripheral portion of the diaphragm plate 22 is the base of the small diameter portion of the pen shaft 12. It is fixed so as to close the communication port 23 on the communication port 23 with the ink storage chamber 13 provided therein.

On the other hand, the pen body holder 16 is provided with a pen body mounting hole 24 at an appropriate depth from the tip end at the center thereof, and the pen body 15 is inserted into the mounting hole 24, and the mounting hole 24 is also mounted.
Through hole 25 is formed in the base end surface of the holder 16, and the opening end of the through hole 25 is formed into a circular protrusion 26, and the protrusion 26 is provided at the center of the diaphragm plate 22. It is fitted in the circular recess 27. Further, the annular tip end surface of the holder 16 is an end face receiving surface of the short tube portion 3 which is integrated with the top plate 2 of the cap body 1.
28 forming.

When the cap body 1 is put on the small-diameter portion 14 of the pen shaft 12 of the writing instrument, the projecting end face 3c of the short tube portion 3 projecting inwardly from the top plate 2 of the writing instrument receives the tip of the pen body holder 16. The stopper surface 28 is brought into contact with the stopper surface 28 or a small space is left therebetween, and the tip end portion of the pen body 15 is inserted into the short tube portion 3. From this state, the top plate 2 is operated to supply the ink in the ink storage chamber 13 to the pen body 15. This action will be described below.

When the top plate 2 of the cap body 1 is pushed down by the fingertip against the elastic force of the spring 5 toward the pen body 15 side as shown in FIG. 3, the short tube portion 3 moves integrally within the cap body 1. Then, the tip end receiving surface 28 of the pen body holder 16 is pressed by the projecting end surface 3c, and the holder 16 is pushed down in the pen axial direction. The protrusion 26 of the holder 16 is fitted into the central recess 27 of the diaphragm plate 22 which is the ink supply control member 17, and when the holder 16 is pushed down, the central portion of the diaphragm plate 22 elastically deforms toward the ink reservoir chamber 13 side.

When the diaphragm plate 22 is elastically deformed in this way, the liquid pressure in the ink storage chamber 13 rises, and a slit 21 provided in the central portion of the diaphragm plate 22 opens with a gap, and the slit 21 opens through the opening. Ink in the ink storage chamber 13 is supplied to the pen body 15 through the through hole 25.

Next, when the pressing force on the top plate 2 is released,
Due to the restoring force of the spring 5, the short tube portion 3 is returned to the original position integrally with the top plate 2, and the diaphragm plate 22 is also elastically restored so that the slit 21 is tightly closed and the ink storage chamber 13 and the pen body are closed. The communication with the through hole 25 on the 15 side is cut off. Due to the restoration of the diaphragm plate 22, the inside of the ink storage chamber 13 is depressurized, and the stopper 19 slides and stops in the direction of reducing the volume of the ink storage chamber 13 according to the depressurization.

Then, the top plate 2 is pushed down again, and the pressing force is released. By repeating this operation several times, a desired amount of ink is supplied from the ink storage chamber 13 to the pen body 15 side. After the writing is made possible without blurring, the cap is removed from the pen shaft 12 and writing is started on the writing surface such as a whiteboard.

FIG. 4 shows another embodiment of the present invention.
In the above embodiment, the top plate 2 of the cap body 1 is projected to the outside from the opening end 1a of the cap body 1. However, in this embodiment, the top plate 2 is immersed in the opening end 1a. With this configuration, the top plate 2 can be protected by the opening end of the cap, and the top plate 2 can be protected when not in use.
Can be prevented from operating unexpectedly.

In any of the above embodiments, the short tube portion 3 is projected on the top plate 2 and the projecting end surface 3c of the short tube portion 3 is pressed against the tip receiving surface 28 of the pen body holder 16. Although the holder 16 is moved in the axial direction, as shown in FIG. 5, the pen body holder 16 is moved by directly pressing the tip of the pen body 15 with the inner surface 2a of the top plate 2. You may keep it. However, in this case, the inside of the cap is contaminated by the ink, which is not practical. Therefore, as shown in FIG. 6, a pressing cylinder 31 is integrally provided on the inner surface of the top plate 2, and the pressing cylinder 31 is integrally projected. It is desirable that the protruding end surface of the cylindrical body 31 presses the tip end receiving surface 28 of the holder 16. In this structure, a stopper 29 is provided around the opening 1a on the distal end side of the cap body 1 so as to surround the ring inward, and the top plate 2 is brought into close contact with the stopper 29 by the elastic force of the spring 5. Therefore, the airtightness is maintained. Furthermore, the diaphragm plate provided in the writing instrument 11
The ink supply control member 17 composed of 22 is not limited to such a structure, and is configured to communicate and block the ink storage chamber 13 and the pen body 15 side by the reciprocating movement of the pen body holder 16. If

[0022]

As described above, according to the cap of the writing instrument of the present invention, the top plate of the cap body can be reciprocally moved against the spring force disposed in the cap body, and the reciprocation of the top plate can be performed. Since the pen body of the writing instrument is reciprocated by the movement, the pen body can be easily reciprocated by the fingertips with the spring force while the cap is covered before writing. The ink can be supplied to the pen body from the ink storage chamber of the writing instrument by interlocking with the operation. Therefore, it is possible to eliminate the stain on the writing surface caused by pressing the pen body against the writing surface such as a whiteboard as in the conventional case, and reciprocate the pen body through the top plate with a light touch. It is possible to prevent damage to the pen body.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a cap covered with a pen shaft,

FIG. 2 is a vertical side view of the entire writing instrument,

FIG. 3 is a vertical sectional side view in which the top plate is pushed down,

FIG. 4 is a vertical sectional side view showing another embodiment of the present invention,

FIG. 5 is a vertical sectional side view showing still another embodiment of the present invention,

FIG. 6 is a vertical sectional side view showing a modified example thereof.

[Explanation of symbols]

 1 Cap body 2 Top plate 3 Short tube part 5 Spring 11 Writing instrument 13 Ink storage chamber 15 Pen body 16 Pen body holder 17 Ink supply control member

Claims (4)

[Claims] 1. A pen body is provided movably in the axial direction through an ink supply control member at the tip of a pen shaft having an ink storage chamber inside, and the ink is supplied by reciprocating the pen body. A cap in a writing instrument configured to open and close a control member to supply the ink in the ink storage chamber to the pen body side, wherein the top plate of the cap body is reciprocated against a spring force arranged in the cap body. A cap for a writing instrument, wherein the pen body is configured to be movable, and the pen body is reciprocated by reciprocating movement of the top plate. 2. The cap body, wherein a short cylinder portion is provided on the inner surface of the top plate so that the opening end of the short cylinder portion is pressed against the pen body holder when the top plate is moved forward. Writing instrument cap. 3. The cap of the writing instrument according to claim 1, wherein the inner surface of the top plate of the cap body, which is spaced apart from the tip of the pen body, is directly pressed against the tip of the pen body when the top plate moves forward. . 4. The cap for a writing instrument according to claim 1, 2 or 3, wherein the top plate of the cap body is recessed inward from the tip opening of the cap body.