JP2022110780A - Ballpoint pen refill and ballpoint pen using the same - Google Patents

Abstract

To facilitate separate-disposal by making it possible to easily separate a ball-point pen tip from an ink storage tube when a ball-point pen refill is discarded.SOLUTION: A ball-point pen refill 11 comprises: a cylindrical ink containing tube 12 made of a non-metallic material; and a ball-point pen tip 13 made of a metal material or a joint member 14 supporting the ball-point pen tip is fitted into a tip of the ink containing tube. In an outer peripheral surface on a writing ball 13a side exposed from the ink containing tube or the joint member at the ballpoint pen tip 13, a concave groove 13e that goes around along the outer peripheral surface is formed. In this configuration, preferably, a writing ball side falling surface 13f forming the concave groove 13e is formed perpendicular to an axial direction of the ball-point pen tip.SELECTED DRAWING: Figure 5

Description

TECHNICAL FIELD The present invention relates to a ball-point pen refill that facilitates separate disposal and a ball-point pen using the same.

The ballpoint pen tip that holds the writing ball at the tip is mostly made of a metal material such as stainless steel. It constitutes a ballpoint pen refill.
A transparent or translucent resin material, such as polypropylene, is used for the ink storage tube in order to ensure ease of molding and visibility of the remaining amount of ink.

This ballpoint pen refill has a system that can be used by replacing it with a new ballpoint pen refill when the ink is used up. Conventionally, it is treated as a disposable member.
For this reason, we devised a ballpoint pen tip that is made of metal material so that it can be easily removed from the ink storage tube made of resin material, etc., making it easier to separate and dispose of the ballpoint pen refill. has been proposed, which is disclosed in Patent Document 1.

JP-A-2006-1047

By the way, according to the ballpoint pen refill disclosed in Patent Document 1, the end of the ink containing tube into which the ballpoint pen tip is press-fitted is provided with a plurality of grooves along the axial direction.
According to this, when a predetermined load or more is applied to the refill main body, the press-fit portion of the ball-point pen tip of the ink containing tube is deformed or damaged due to the presence of the plurality of grooves. The ballpoint pen tip can be easily separated.

However, the presence of the plurality of grooves formed in the ink containing tube mechanically weakens the press-fitting portion of the ballpoint pen tip in the ink containing tube. It is difficult to adjust and manage the bond strength of
That is, when the pen is used with a heavy writing load or is subjected to an impact due to being dropped, problems such as ink leakage may occur at the press-fit portion of the ballpoint pen tip in the ink reservoir tube.

This invention has been made by paying attention to the above-mentioned problems of conventional ballpoint pen refills. , the ball-point pen tip can be easily separated from the ink storage tube, and by facilitating separate disposal, a ball-point pen refill that is environmentally friendly and a ball-point pen using the same The task is to provide

A ball-point pen refill according to the present invention, which has been devised to solve the above-described problems, comprises an ink containing tube formed in a cylindrical shape from a non-metallic material, and a ball-point pen tip formed from a metallic material at the tip of the ink containing tube. A ball-point pen refill to which a joint member for supporting the ball-point pen tip is fitted and attached, wherein the outer peripheral surface of the ball-point pen tip on the side of the writing ball exposed from the ink containing tube or the joint member has a surface of the outer peripheral surface It is characterized in that a concave groove that is concave in the axial direction is provided.

In this case, it is desirable that the concave groove is formed in a circle along the outer peripheral surface, and that the depth from the outer peripheral surface is evenly formed along the circumferential direction of the concave groove.
Further, it is desirable that the writing ball-side falling surface forming the concave groove is formed in a state orthogonal to the axial direction of the ball-point pen tip.

On the other hand, a ball-point pen according to the present invention is a ball-point pen in which the above-described ball-point pen refill is housed in a barrel, and the tip of the ball-point pen tip is attached to the tip of the barrel or the base attached to the tip of the barrel. A tip opening for protruding a part is formed, and in a writable state in which the ballpoint pen tip is protruded from the tip opening, all of the concave grooves are positioned inside the tip opening.

In this case, a step is provided in the front end portion of the barrel main body or in the front end opening formed in the mouthpiece so that the ball-point pen tip can be pulled toward the writing ball by engaging with the recessed groove of the ball-point pen tip. It is desirable that a part is formed.
Also preferably, the stepped portion is formed by increasing an inner diameter with respect to the tip opening.

According to the ball-point pen refill according to the present invention, the outer peripheral surface of the ball-point pen tip on the side of the writing ball exposed from the ink containing tube or the joint member is provided with a concave groove that makes a circuit along the outer peripheral surface. Therefore, by engaging a part of a tool or a mouthpiece that constitutes the exterior of the ballpoint pen in the concave groove and pulling the ballpoint pen tip toward the writing ball, the ballpoint pen tip made of a metal material is pulled. , can be easily separated from the side of the ink containing tube formed of a non-metallic material such as a resin material.
This makes it possible to facilitate sorting and disposal, and to provide a ball-point pen refill that is environmentally friendly and a ball-point pen using the same.

On the other hand, according to the ball-point pen according to the present invention, the ball-point pen tip is protruded from the front end opening formed in the front end of the barrel or the base attached to the front end of the barrel in a writable state. All of the concave grooves are configured to be positioned inside the tip opening.
Therefore, the ball-point pen tip is supported with a small clearance from the tip opening on the outer peripheral surface on the writing ball side avoiding the recessed groove. As a result, it is possible to provide a ball-point pen that ensures writing stability.

1 shows an embodiment of a ball-point pen according to the present invention, (A) is a front view, (B) is a central cross-sectional view, and (C) is an enlarged cross-sectional view of a writing tip. 2 shows an embodiment of a ballpoint pen refill used in the ballpoint pen shown in FIG. 1, (A) is a front view, (B) is a central cross-sectional view, and (C) is an enlarged cross-sectional view of the tip of the refill. 1 shows a single ball-point pen tip structure, (A) is a perspective view, (B) is a front view, and (C) is a central cross-sectional view. 1 shows a single-piece structure of a mouthpiece, (A) is a front view, (B) is a perspective view, and (C) is a central cross-sectional view. An example of pulling a ball-point pen tip using a base is shown, (A) is a front view, (B) is a central cross-sectional view, and (C) is a partially enlarged cross-sectional view of the base and ball-point pen tip.

A ball-point pen refill according to the present invention and a ball-point pen using the same will be described based on embodiments shown in the drawings.
FIG. 1 shows an embodiment in which the ballpoint pen refill according to the present invention is used for a knock type ballpoint pen. In this knock-type ballpoint pen 1, the cap 3 is attached to the front end of the barrel 2 by screwing a male screw provided to the front end of the barrel 2 constituting an exterior body with a female screw provided to the cap 3. Attached detachably.
A clip support cylinder 5 integrally formed with a clip 4 is inserted into the rear end of the shaft cylinder 2 and attached to the shaft cylinder 2. At the rear part of the clip support cylinder 5, there is a clip that can move in the axial direction. A knock bar 6 is attached to the .

A ball-point pen refill 11 is accommodated in the barrel 2. The details of the ball-point pen refill 11 will be described later with reference to FIG. A ballpoint pen tip 13 is attached via a joint member 14 .
The state shown in FIG. 1 shows a state in which the ball-point pen tip 13 protrudes from the tip opening 3a formed in the cap 3 and writing is possible.

A shaft spring 8 is arranged between the mouthpiece 3 and the joint member 14 of the ballpoint pen refill 11 . there is
As a result, the axial spring 8 applies an urging force toward the rear end side of the axial cylinder 2 also to the knock rotor 7 and the knock rod 6 via the ink containing tube 12 .

The knock rotor 7 interposed between the ink containing tube 12 and the knock rod 6 constitutes a well-known khan knock mechanism. , long and short notches (not shown) along the axial direction are arranged in the circumferential direction.
Further, a configuration (not shown) in which projections are formed in the outer diameter direction on the outer periphery of the tip end of the knock rotor 7 is adopted.
By knocking the knock rod 6 against the biasing force of the shaft spring 8, the ball-point pen tip 13 is protruded from the front end opening 3a of the base 3 and can be written, and the ball-point pen tip 13 is housed in the base 3. It acts so that the state that was done is repeated.

When replacing the ballpoint pen refill 11, the ballpoint pen refill can be pulled out from the barrel 2 by removing the cap 3 screwed to the front end of the barrel 2, and the new ballpoint pen refill 11 can be inserted into the barrel 2. , and screwing the base 3 into the barrel 2, the replacement of the ballpoint pen refill 11 is completed.
In this case, the axial spring 8 can be attached along the inner diameter of the mouthpiece 3 by utilizing its own resilient force, thereby preventing loss of the axial spring 8 .

A non-slip member made of a resin elastic material is formed on the peripheral surface of the front end portion of the barrel 2, and is configured to function as a grip portion 2a of the barrel 2. As shown in FIG.
The shaft tube 2, the mouthpiece 3, the clip 4, the clip support tube 5, the knock rod 6, and the knock rotor 7 in this embodiment are each made of a resin material.

FIG. 2 shows the ballpoint pen refill 11, which has the ballpoint tip 13 attached to the front end of the ink containing tube 12 via the joint member 14, as already described.
The ink containing tube 12 is made of a resin material such as polypropylene, and is formed into a cylindrical shape with the same wall thickness from the front end to the rear end, and is configured in a straight shape.
An ink backflow preventer (follower) 12a is housed in the ink containing tube 12, contacts the rear end of the ink in the ink containing tube 12, and advances as the ink is consumed.

The joint member 14 is also preferably constructed using a resin material such as polypropylene, and the joint member 14 sandwiches the inner diameter portion and the outer diameter portion of the ink containing tube 12 at the front end portion of the ink containing tube 12 . In this way, it is press-fitted and connected to the ink containing tube 12 .
A rear portion of a ball-point pen tip 13 made of a metal material such as stainless steel is press-fitted along the inner peripheral surface of the front end portion of the joint member 14 .

As shown in FIG. 3, the ball-point pen tip 13 has a conical tip, and a writing ball 13a is attached to the top of the conical tip. In the illustrated example, a spring 13b is mounted in the internal space of the ball-point pen tip 13. As shown in FIG. A tip portion of the spring 13b is formed in a straight rod shape to constitute a push rod 13c, and the push rod 13c pushes the writing ball 13a toward the front end.
A part of the rear end portion of the ballpoint pen tip 13 is crimped inward, and the rear end portion of the spring 13b is locked by this crimped portion 13d.

Further, a recessed groove 13e is formed along the outer peripheral surface of the cylindrical ball-point pen tip 13 at a position facing forward from the central portion of the ball-point pen tip 13 in the longitudinal direction. This concave groove 13e is formed so as to be concave from the surface of the ball-point pen tip 13 in the axial direction. Further, the depth from the outer peripheral surface of the ball-point pen tip 13 is formed to be uniform along the circumferential direction of the concave groove 13e, and the groove width is also formed to be the same width along the circumferential direction. ing.
Then, as shown in FIG. 3C, the falling surface 13f on the side of the writing ball 13a forming the recessed groove 13e is formed in a state orthogonal to the axial direction indicated by the aa line of the ball-point pen tip 13. .

That is, the recessed groove 13e has a descending surface 13f on the side of the writing ball 13a that is perpendicular to the line aa, so that the tip of a tool, a base 3 of a ball-point pen, which will be described later, etc. It is possible to make it easier to lock a part.
As a result, the ball-point pen tip 13 can be easily pulled out toward the writing ball 13 from the relay member 14 and the ink containing tube 12 to be separated.
Since the groove 13e described above has a function of locking a part of the base 3 of a tool or a ball-point pen, the groove 13e extends from the joint member 14 as shown in FIG. 2(C). It needs to be formed on the outer peripheral surface of the exposed writing ball 13a.
This is the same even when the ballpoint pen tip 13 is connected to the ink containing tube 12 without the joint member 14 interposed therebetween.

On the other hand, the above-described grooves 13e are preferably all grooves 13e in a writable state in which the ball-point pen tip 13 protrudes from the tip opening 3a of the cap 3 as shown in FIG. 1(C). is configured to be located inside the
As a result, the ball-point pen tip 13 is supported with a small clearance from the tip opening 3a on the outer peripheral surface of the writing ball 13a side avoiding the groove 13e. Therefore, the ball-point pen tip 13 can ensure the stability of writing without any excessive looseness between the ball-point pen tip 13 and the tip opening 3a.
In this embodiment, the ball-point pen tip 13 is supported by the tip opening 3a of the base 3. However, the tip opening 3a is provided at the tip of the barrel without providing the base as a separate member. Similar effects can be obtained with a ball-point pen as well.

FIG. 4 shows a specific configuration of the base 3 used as a jig for pulling out and separating the ballpoint pen tip 13 from the side of the relay member 14 and the ink containing tube 12, and FIG. 5 shows an example of the pulling operation. there is
In FIG. 4, which shows a single structure of the base 3, as is well known, the base 3 has a conical shape facing forward, and a front end opening 3a having a cylindrical inner peripheral surface is formed at the front end thereof. The inner diameter of the tip opening 3a is determined so that the ball-point pen tip 13 can protrude and retract with an appropriate clearance with respect to the outer peripheral surface of the ball-point pen tip 13. As shown in FIG.

A female screw 3b is formed in the rear opening of the base 3, and the female screw 3b is screwed into the male screw formed at the front end of the barrel 2, so that the base 3 is attached to the barrel 2. can be attached detachably.
A plurality of ribs 3c are formed along the axial direction on the inner peripheral surface of which the inner diameter gradually tapers inward from the area where the female thread 3b is formed. The spring 8 is held by its radial elastic force.
Further, a stepped portion 3e formed by increasing the inner diameter with respect to the tip opening 3a is formed between the tip opening 3a and the cylindrical space 3d formed toward the tip opening 3a. .

FIG. 5 shows a state in which the stepped portion 3e of the cap 3 is engaged with the falling surface 13f of the groove 13e formed in the ballpoint pen tip 13, and the ballpoint pen tip 13 is pulled toward the writing ball 13a. ing.
That is, as shown in FIG. 5(C), by inserting the ball-point pen tip 13 into the tip opening 3a of the base 3 and tilting the rear part of the base 3 so that it faces slightly downward, the stepped portion 3e of the base 3 becomes the ballpoint pen. It engages with the falling surface 13f of the chip 13. As shown in FIG. By pulling the base 3 in this state, the ball-point pen tip 13 can be pulled out from the ink containing tube 12 side.

Although the example shown in FIG. 5 shows an example in which the cap 3 is used as a pulling jig for the ballpoint pen tip 13, the tip opening 3a is provided at the tip of the barrel without providing the cap as a separate member. In the case of a ball-point pen as well, the ball-point pen tip 13 can be pulled out from the ink containing tube 12 side in the same manner by utilizing the stepped portion where the inner diameter is enlarged with respect to the tip opening of the barrel.

As is clear from the above description, according to the ball-point pen refill and the ball-point pen according to the present invention, the ball-point pen tip made of metal material can be easily pulled out from the side of the ink containing tube made of resin material, for example.
As a result, it is possible to obtain the effects described in the column of the effects of the invention, such as being able to facilitate the sorted disposal of ballpoint pen refills and provide ballpoint pen refills and ballpoint pens that are environmentally friendly.

REFERENCE SIGNS LIST 1 ballpoint pen 2 barrel 2a grip 3 cap 3a tip opening 3b female screw 3c rib 3d cylindrical space 3e stepped portion 4 clip 5 clip support cylinder 6 knock rod 7 knock rotor 8 shaft spring 11 ballpoint pen refill 12 ink storage tube 12a Follower 13 Ballpoint pen tip 13a Writing ball 13b Spring 13c Push rod 13d Crimping part 13e Groove 13f Falling surface 14 Joint member

Claims (4)

A ball-point pen refill comprising a cylindrical ink containing tube made of a non-metallic material and a ball-point pen tip made of a metallic material or a joint member supporting the ball-point pen tip fitted to the tip of the ink containing tube. and
A ball-point pen refill, wherein the outer peripheral surface of the ball-point pen tip on the side of the writing ball exposed from the ink containing tube or the joint member is provided with a concave groove recessed in the axial direction from the surface of the outer peripheral surface. 2. The ball-point pen refill according to claim 1, wherein the concave groove makes a round along the outer peripheral surface, and the depth from the outer peripheral surface is evenly formed along the circumferential direction of the concave groove. 3. The ball-point pen refill according to claim 1, wherein the writing ball-side falling surface forming the recessed groove is formed perpendicular to the axial direction of the ball-point pen tip. A ballpoint pen in which the ballpoint pen refill according to any one of claims 1 to 3 is accommodated in a barrel,
The distal end of the barrel or the mouthpiece attached to the distal end of the barrel is formed with a tip opening for projecting the tip of the ballpoint pen tip, and the ballpoint pen tip is protruded from the tip opening so that writing is possible. 2. A ball-point pen according to claim 1, wherein all of said concave grooves are positioned inside said tip opening.

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