JP2003251983A - Writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To constitute an airtight chuck for making the writing tip of a refill dry-proof, without depending upon an elastic material, in a writing utensil with a refill such as a marking pen, a fluorescent pen or a correction pen. <P>SOLUTION: The airtight chuck (11) is constituted of two chuck pieces (12) and (12), each of which is pivotally fitted with a pin (14) inside a barrel. The inner face of the chuck piece (12) is provided with a sliding contact part (17) with which the contact part (18) of the refill (1) frictionally slides into contact and an inward projecting part. When the refill (1) recedes, the contact part (18) frictionally slides into contact with the sliding contact part (17) or runs into the inner projecting part and a tip opening part (10) of the airtight chuck (11) is closed following the rotation of the chuck piece (12). Further, when the refill (1) advances, the chuck piece (12) rotates in the opposite direction, resulting in the opening of the tip opening part (10). <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument having a writing body (refill) containing a marker, a water-based ink pen, a water-based ball pen, a fountain pen, a correction pen, a highlighter pen and other easily volatile writing components. It is about.

[0002]

2. Description of the Related Art Writing materials such as markers are hermetically held by a cap or an appropriate sealing device so that the tip of the writing does not dry when not in use. In a capless writing instrument, an airtight chuck is known in which a refill is housed in a barrel, and when the refill is moved forward, a tip opening is opened, and when retracted, the tip opening is closed. There is. Usually, the airtight chuck is made of an elastic material that is urged in either the opening direction or the closing direction of the tip opening, and when the refill is moved, the airtight chuck is moved in the urged direction or the axial cylinder. Since it is configured to open and close in a direction opposite to the urging direction by hitting an inclined surface or a cam surface provided inside and to perform a required opening / closing operation, positioning is troublesome or the structure is complicated, It was difficult to obtain economically.

[0003]

The problems to be solved by the present invention are as follows.
In the capless writing instrument as described above, the tip opening portion of the airtight chuck is moved along with the back-and-forth movement of the refill without urging the member itself constituting the airtight chuck in the opening direction or the closing direction of the tip opening portion. It is to provide a writing instrument that can be opened and closed.

[0004]

In the conventional structure, since the member itself constituting the airtight chuck is elastically urged in one direction to open and close, the member moves in the opposite urging direction. Although other members such as an inclined surface were required for this purpose, if the linear motion associated with the back-and-forth movement of the refill can be converted into rotary motion, this rotary motion can be used to directly open and close the tip opening of the airtight chuck. can do.

Based on such knowledge, according to the present invention, the refill is housed in the axial cylinder so as to be movable back and forth in the axial direction, and the tip of the refill is airtightly enclosed in the retracted position. In a writing instrument with an airtight chuck having a tip opening, the airtight chuck is composed of a plurality of complementary chuck pieces, and the chuck pieces are pivotally mounted in a barrel so as to be swingable. When retreating, the chuck part is rotated by the refill in a direction of closing the tip opening of the airtight chuck, and when the refill advances, the tip opening of the airtight chuck is opened by the refill. A contact portion is provided on the outer surface of the refill so as to rotate the chuck portion piece in a direction, and an inward protrusion portion that abuts the contact portion or a sliding contact portion that frictionally contacts the inside of the chuck portion piece. Writing instrument being characterized in that formed on is provided, the problems are solved.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The writing instrument of the present invention comprises a water-based ballpoint pen, a felt-tip pen, an oil-based ink marker, a highlighter pen, a correction pen, a direct liquid type writing instrument and other appropriate refills (writing instruments) (1). ), And the refill (1) is provided in the barrel (2).
Is stored so that it can be moved back and forth in the axial direction. As a mechanism for moving the refill (1) back and forth, a known appropriate feeding mechanism such as a cam mechanism and a rotating cam mechanism can be adopted. Figure 1
In the embodiment shown in (1), a rotary cam mechanism is used as an example, and an outer cam (3) having a vertical groove is formed integrally with or separately from the barrel and provided in the barrel (2), A rotor (4) engaging with the longitudinal groove of the outer cam (3), a cam engaging with a cam formed on the rotor (4), and engaging with the longitudinal groove of the outer cam (3) The knock cam (5) and the knock (6) fitted to the knock cam (5) are housed in the barrel, and the refill (1) biased in the backward direction by the spring (7) is inserted into the knock (6). By operating 6), the writing tip (8) can be moved forward to project from the tip (9), or can be moved to the retracted position where the writing tip is immersed in the barrel.

At the front portion of the barrel (2), the refill is provided.
An airtight chuck (11) having an openable and closable tip opening (10) that hermetically surrounds the writing tip (8) of the refill (1) when the reel (1) is in the retracted position. . The airtight chuck (11) is composed of a plurality of complementary, in the illustrated embodiment, two chuck pieces (12), (12) in a substantially conical shape, and the chuck pieces (12), (12) 12) is pivotably mounted in the barrel. To pivotally attach the chuck piece (12), a receiving hole (13) is formed in the chuck tube piece (12) at an appropriate portion of the shaft cylinder, and a pin (14) is inserted therethrough. A pin or a rotary shaft may be integrally formed in (12) and the pin may be fitted into a receiving hole provided at an appropriate portion.

The chuck piece (12) is formed of a plastic material, and the entire piece may be formed of a hard plastic material. However, as shown in FIG. 4 (A), the substrate portion (15) is preferable. ) Is formed of a hard plastic material, and the inner portion (16) is integrally formed on the inner surface of the inner surface with a soft plastic material by a two-color molding or injection molding method. The inner part (16) preferably includes at least a tip opening (10) and a sliding contact part (17) described later, and can be partially formed as shown in FIG. 4 (B).

On the inner surface of the chuck part (12), there is provided a sliding contact part (17) which frictionally comes into sliding contact or pressure contact with the contact part (18) of the refill (1). The sliding contact part (17) is shown in FIG.
When the refill (1) is retracted as shown in (1), the contact portion (18) slides (presses) to contact the airtight chuck (1).
When the chuck piece (12) is rotated in the direction of the arrow (19) where the tip opening (10) of (1) is closed, the sliding contact portion (17) is frictionally moved when the refill (1) advances. Such as turning the chuck piece (12) in the direction of the arrow (20) that opens the tip opening (10) of the airtight chuck (11) by the abutting portion (18) that is in sliding contact (press contact) with It is provided in the part. The sliding contact (1
The surface of 7) or the contact portion (18) may be roughened to increase the frictional resistance.

With the above construction, when the refill (1) is in the retracted position, the airtight chuck (11) surrounding the refill (1) has the tip opening (10) closed and the abutment portion.
The sliding contact portion (17) and the sliding contact portion (17) are in sliding contact (press contact) to securely surround the writing tip (8) of the refill (1) (Fig. 1).
(A)), the writing tip of the refill (1) is prevented from drying.

Further, as shown in FIG.
When the rule (1) is moved forward, the sliding contact part (17) is moved to the contact part (1
Since the tip opening (10) of the airtight chuck (11) is opened immediately by being moved by 8), make sure that the writing tip (8) of the refill (1) does not hit the airtight chuck. You can

In the above embodiment, the contact portion (18) of the refill (1) is formed integrally with the refill (1), but it is formed as a separate body to form the refill. It may be attached. 5 and 6 show such an embodiment,
A substantially cylindrical refill holder (21) having an abutting portion (18) is formed, and the refill holder (21) is refilled (1).
It is mounted by being inserted into the distal end of, and fixed by an engaging means such as press-fitting, concave-convex engagement, screw engagement, or adhered with an adhesive. The abutting portion (18) and the refill holder (21) may be made of a soft material.

With the above structure, as shown in FIG. 6 (A), a knock (not shown) for operating the refill (1) is pushed by pushing the refill (1) from the retracted state. -When the reel (1) is advanced, the abutting portion (18) of the refill (1) and the sliding contact portion (17) of the chuck piece (12) frictionally slide (press contact) and Since the chuck piece is pivotally attached,
The force of pulling the sliding contact portion (17) forward by the contact portion (18) causes the chuck portion piece (12) to rotate in the direction in which the tip opening portion (10) opens, and the state shown in FIG. Thus, the writing tip (8) of the refill (1) can be projected forward from the tip (9) of the barrel (2) for writing.

Further, when the knock is operated to retract the refill (1) from the state shown in FIG. 6 (B), the abutting portion (18) moves the abutting portion (18) in the middle of the backward movement. Sliding contact part (17)
6A, the chuck piece 12 is rotated in the direction in which the tip opening 10 is closed by the force of pulling the slide contact portion 17 backward. As described above, the writing tip (8) of the refill (1) is surrounded and the rear portion is sealed by the contact portion (18) and the sliding contact portion (17) to hermetically seal the writing tip (8). Can be sealed.

In each of the above-described embodiments, the chuck piece is pivotally attached to the barrel by the pin, but it may be pivotally attached without using the pin. FIG. 7 shows one such embodiment,
A receiving groove having a projection (22) having an arcuate outer surface on the rear portion of the chuck piece (12) and having an arcuate receiving surface on which the arcuate projection (22) is rotatably fitted. Formed (23). Also,
The protrusion (22) may be formed on the barrel and the receiving groove (23) may be formed on the chuck piece. With such a configuration, the chuck piece can be easily assembled to the barrel, and It can function almost the same as the chuck piece of each embodiment.

In each of the above-described embodiments, the sliding contact portion of the chuck piece and the contact portion of the refill are brought into sliding contact to open and close the airtight chuck. The parts may be brought into contact with each other to open and close the airtight chuck. 8 to 10, the airtight chuck (11) has two chuck part pieces (12) and (12) so as to form a substantially conical shape by complementarily combining the inner surface of the chuck part piece. An inward protruding portion (24) protruding in the axial direction is formed therein, and a rotary shaft (26) is protrudingly provided on both sides of the boss portion (25) on the outer surface. The chuck piece (12)
Has a matrix portion (15) formed of a hard plastic material and an internal portion (16) formed of a soft plastic material, similar to the above embodiment.

As shown in FIG. 11, the tip of the rib (27) provided on the inner surface of the front portion of the barrel (2) and the rear end of the rib (28) provided on the inner surface of the tip tool (9) attached to the barrel are shown in FIG. As shown in FIG. 12, semicircular bearings (29) and (30) are provided, respectively.
The bearings (29), (30) form a receiving hole (31) when the tip (9) is attached to the barrel (2) as shown in FIG. 8, and the receiving hole (3) is formed.
The rotary shaft (26) of the chuck piece is rotatably fitted in 1). The tip tool (9) and the shaft tube (2) are positioned by inserting the guide projection (32) formed on the shaft tube (2) into the receiving groove (33) of the tip tool (9). Each rib (27), (28) is formed with a cavity (34), (35) having a width for inserting the boss (25) of the chuck piece (12), and the boss is formed in the cavity. The chuck piece (12) is rotatably held at a predetermined position by inserting the.

The refill (1) advances and retreats in the axial direction by an appropriate feeding mechanism as described above, but when retreating, the refill (1) contacts the inward projecting portion (24) of the chuck piece (12). An abutting portion (36) is provided so as to rotate the chuck portion piece (12) in a direction of contacting and closing the tip end opening portion (10) of the airtight chuck (11). When the refill (1) moves forward, it contacts the inner surface of the chuck piece (12) and pushes the chuck piece so that the tip opening of the airtight chuck (11) is opened. An opening (37) is provided.

The abutting portion (36) and the pushing open portion (37) can be integrally formed at appropriate positions on the refill (1), but preferably, as shown in FIG. The cylindrical refill holder (21) is formed with a long groove (38) penetrating the bottom or inner and outer surfaces into which the inward protruding portion (24) of the chuck piece is fitted, and the groove end on the tip side of the long groove is abutted. It is advisable to use the contact portion (36) and the front end surface as the push-opening portion (37). The refill holder (21)
Can be inserted, press-fitted, concave-convex engaged, screw-engaged, etc., or adhered to the refill in the same manner as the refill holder of the above embodiment. Further, as shown in FIG. 14, a spring is fitted between the flange (39) provided on the outer periphery and slidably fitted in the tip of the refill (1) and the inner step (40) of the barrel (2). (Four
1) may be provided to bias the refill holder (21) in the retreat direction of the refill.

With the above construction, when the refill (1) is retracted, the abutting portion (36) abuts the inward protruding portion (24) of the chuck portion piece (12) and the chuck portion piece (12). ) Can be rotated to close the tip opening of the airtight chuck (FIG. 8 (A)). Further, when the refill (1) advances, the push-out part (37) contacts the inner surface of the chuck part piece (12) to rotate the chuck part piece (12) to open the tip opening part. It is possible (FIG. 8 (B)). It should be noted that an appropriate protrusion (not shown) may be provided on the inner surface of the chuck piece so that the push-opening part (37) can surely contact the chuck piece.

FIG. 15 shows still another embodiment. In the figure, an abutting portion (42) provided on the refill (1) or the refill holder (21) is formed on an inclined surface, and an inward protrusion (43) formed on the chuck piece (12). Although it is also formed on the inclined surface, the refill holder does not have the long groove as shown in the above embodiment. Then, as shown in FIG. 9A, when the refill retracts, the abutting surfaces of the abutting portion (42) and the inward protruding portion (43) come into contact with each other, and the chuck piece (12) is rotated. Move the airtight chuck (11) to close the tip opening (10), and when moving forward, rotate the chuck piece (12) with the pushing open part (44) to move the tip opening of the airtight chuck (11). You can open (10). ((B) of the same figure).

[0022]

The present invention is constructed as described above, and the airtight chuck is constructed by a plurality of complementary chuck pieces.
The chuck part is pivotally attached, and when the refill is retracted, the chuck part is rotated in a direction to close the tip end opening of the airtight chuck and the airtight chuck is advanced when the refill is advanced. To rotate the chuck piece in a direction of opening the tip opening of the chuck.
Since the sliding contact portion and the inward protruding portion that frictionally contact the contact portion formed on the outer surface of the chuck are formed on the inner surface of the chuck piece, the airtight chuck is automatically opened and closed as the refill moves back and forth. Since the airtight chuck itself does not have to be formed of an elastic material as in the conventional case, the tip opening can be surely opened or closed.

The substrate portion of the chuck piece is made of a hard plastic material, and the inner portion of the inner portion is made of a hard plastic material.
When formed of a soft plastic material according to the procedure of color molding or injection molding, the sealing action of the tip end opening and the sliding action of the sliding part and the abutting part are ensured, and smooth operation is possible. The part does not fall off, has excellent durability and can be used for a long time.

Furthermore, if a refill holder having an abutting portion is formed and the refill holder is mounted on a known refill and used, a special refill does not have to be constructed. Therefore, the present invention can be applied to various types of refills.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, in which (A) is a state in which a refill is retracted and (B) is a state in which the refill is advanced.

2 is a perspective view showing the writing tip of the airtight chuck and the refill shown in FIG. 1. FIG.

FIG. 3 is an explanatory view showing an operating state, in which (A) is a backward movement of the refill and (B) is a forward movement of the refill.

4A and 4B are cross-sectional views of a chuck piece having a substrate portion and an internal material portion, respectively.

FIG. 5 is a partial exploded perspective view showing another embodiment of the present invention.

6A and 6B show operational states of the embodiment shown in FIG. 5, where FIG. 6A is an explanatory diagram when the refill is moved backward, and FIG. 6B is an explanatory diagram when the refill is moved forward.

FIG. 7 is a partial cross-sectional view showing another embodiment.

FIG. 8 shows another embodiment, and (A) is an explanatory view when the refill is moved backward, and (B) is an explanatory view when the refill is moved forward.

9 is a perspective view showing a part of the embodiment shown in FIG. 8 in section.

FIG. 10 shows the chuck pieces in a combined state,
(A) is a front view, (B) is a rear view, (C) is a plan view,
(D) is a half sectional view and (E) is a bottom view of one chuck piece.

FIG. 11 shows a part of a barrel, (A) is a half sectional view,
(B) is a bottom view.

FIG. 12 shows a tip, (A) is a half sectional view, and (B) is a plan view.

13A and 13B show a refill holder, FIG. 13A is a plan view, FIG. 13B is a half sectional view, and FIG.

FIG. 14 is an explanatory view showing another embodiment.

FIG. 15 shows still another embodiment, (A) is a refill.
(B) is an explanatory diagram when the refill is moved forward

[Explanation of symbols]

1 ... Refill 2… Shaft cylinder 8 ... Writing tip 9 ... Tip 10 ... Tip opening 11 ... Air tight chuck 12 ... Chuck piece 15 ... Substrate part 16 ... Interior part 17 ... Sliding part 18 ... Abutting part 21 ... Refill holder

Claims (11)

[Claims] 1. A refractor that is movable back and forth in an axial direction in a shaft cylinder.
In a writing instrument with an airtight chuck having an openable tip opening that airtightly surrounds the tip of the refill in a retracted position, the airtight chuck is composed of a plurality of complementary chuck pieces. The chuck part is pivotally attached so that when the refill moves backward, the chuck part is rotated in a direction to close the tip opening of the airtight chuck, and when the refill moves forward, the airtight. It is characterized in that a sliding contact portion frictionally contacting an abutting portion on the outer surface of the refill is formed on the inner surface of the chuck portion so as to rotate the chuck portion piece in a direction to open the tip opening portion of the chuck. Writing instrument. 2. A refill which is movable back and forth in an axial direction in a shaft cylinder.
In a writing instrument with an airtight chuck having an openable tip opening that airtightly surrounds the tip of the refill in a retracted position, the airtight chuck is composed of a plurality of complementary chuck pieces. The chuck piece is pivotally mounted so as to be swingable, and an inward projection is formed on the chuck piece, and the chuck piece is rotated in a direction to close the tip opening of the airtight chuck when the refill retracts. An abutting portion that abuts the inward protruding portion is formed in the refill so as to move, and the chuck piece is rotated in a direction to open the tip opening of the airtight chuck when the refill advances. A writing instrument characterized in that a push-opening portion that comes into contact with the inner surface of the chuck piece is formed in the refill. 3. The chuck piece has a substrate portion made of a hard material and an inner portion integrally formed of a soft material on the inner surface of the substrate portion by a two-color molding or injection molding method. Writing instrument described in. 4. The writing instrument according to claim 3, wherein the internal portion includes at least the tip opening portion and the sliding contact portion. 5. The writing instrument according to claim 1, wherein an abutting portion of the refill in contact with the chuck piece is formed integrally with the refill. 6. The writing instrument according to claim 1, wherein an abutting portion of the refill in contact with the chuck piece is formed on a refill holder mounted on the refill. 7. The writing instrument according to claim 2, wherein a long groove into which the inwardly projecting portion of the chuck piece is fitted is formed in the refill, and the groove end on the tip side of the long groove serves as an abutting portion. 8. The writing instrument according to claim 7, wherein the long groove of the refill is provided in a refill holder attached to the refill. 9. The writing instrument according to claim 1, wherein the chuck piece is pivotally attached to the barrel by a pin. 10. The chucking piece according to claim 1, wherein the chucking piece has a rotary shaft, and the rotary shaft is fitted in a receiving hole formed by a barrel and a tip attached to the barrel. Writing instrument. 11. A chuck part piece by forming an arc-shaped projection on one member of the shaft cylinder and the chuck part piece, and forming a receiving groove for rotatably fitting the arc-shaped projection on the other member. The writing instrument according to claim 1, wherein the writing instrument is pivotally attached.