JP2001063283A - Composite writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite writing instrument without breaking at least a ballpoint pen tip by dropping in a high class composite writing instrument using a metal barrel containing at least a ballpoint pen type writing element as a writing element. SOLUTION: In the writing instrument comprising a plurality of writing elements 7 including at least one or more ballpoint pen refills disposed in a barrel, thereby projecting or retracting the writing part of the element 7 from a front end of the barrel by selecting a desired element 7, at least a front part of the barrel is formed of a metal, and a resin layer 1a is formed on an inner surface of the metal barrel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of arranging a plurality of writing objects including at least one ball-point pen refill in a shaft cylinder, selecting a desired writing object, and writing the writing object. The present invention relates to a composite writing instrument that allows a portion to protrude and retract from the tip of a barrel. More specifically, the front part (front shaft) of the barrel is formed of metal, and the outer wall of the barrel is spray-painted, plated, etc. to decorate the appearance, so that it has a high-class appearance and looks good. The present invention relates to a composite writing instrument which has a ballpoint pen refill and prevents a writing tip (tip) from being crushed.

[0002]

2. Description of the Related Art Conventionally, a plurality of writing bodies including at least one ball-point pen refill are arranged in a barrel composed of a front shaft, a center shaft and a rear shaft, and a desired writing body is selected. 2. Description of the Related Art A composite writing instrument that allows a writing portion of a body to protrude and retract from the tip of a barrel is known. Many of these types of composite writing instruments are positioned as luxury goods. Therefore, in order to add added value such as luxury and appearance to the composite writing instrument, a method of forming the barrel with metal such as brass and aluminum, and spraying, plating, etc. on this surface and decorating it has been adopted in many cases. ing.

[0003]

By the way, it is common practice to accidentally drop a writing implement on the ground or floor. Many writing instruments have been subjected to various measures so that they can be safely dropped. However, in the case of a composite writing instrument using a metal barrel as described above, if the pen is dropped on the ground or floor with the cursive stowed, the ballpoint pen tip will be crushed by the impact, and the ink inside will be In some cases, it leaked and soiled the surroundings. The cause is as follows. In the composite writing instrument, a plurality of cursive objects are arranged in a barrel. Therefore, each writing body is arranged outside the center of the barrel. Therefore, when the writing body is protruded from the distal end of the barrel, the front portion slides on the inner wall of the barrel. However, since the impact force applied to the cursive body at the time of dropping is larger than that at the time of the normal projecting operation, the tip of the cursive body collides with the inner wall of the barrel. On the other hand, the metal material is exposed as it is on the inner surface of the barrel. For this reason,
The pen point at the tip of the cursive will collide with the metal plate, and if the pen point is a ballpoint pen, the pen point will be crushed. At this time, the balance of the space for discharging the ink is lost, and the ink leaks from the pen tip. SUMMARY OF THE INVENTION An object of the present invention is to provide a high-grade composite writing instrument using a metal barrel, which has at least a ballpoint pen refill as a writing body, and at least a ballpoint pen tip is not broken by dropping.

[0004]

Means for Solving the Problems The present invention provides at least:
In a writing instrument in which a plurality of writing bodies including one or more ballpoint pen refills are arranged in a barrel, a desired writing body is selected, and a writing part of the writing body appears and disappears from a tip of the barrel, at least a front part of the barrel is provided. And a resin writing layer formed on the inner surface of the metal shaft barrel.

[0005]

1 to 3 show an embodiment of the present invention. The present invention will be described in further detail based on the embodiment. In the figure, reference numeral 1 denotes a front shaft, and the front shaft 1 is screwed to a center shaft 3 by a core 2. Rear shaft 4 for this central shaft 3
Are movably arranged in the longitudinal direction of the center shaft 3. The shaft cylinder is composed of the front shaft 1, the middle shaft 3, and the rear shaft 4. A clip 12 and a crown 13 are attached to the rear shaft 4.

[0006] A plurality of writing bodies 7 are arranged in the barrel, and at least one of the plurality of writing bodies 7 must be a ball-point pen refill. The writing body 7 is detachably fitted to the core fixing pipe 8, and the core fixing pipe 8 is fixed to the core stopper 9 by means such as caulking. This centering stopper 9 is a cylinder 1 arranged in the center shaft 3.
It is arranged by a resilient member 5 such as a spring in a U-shaped groove partitioned by a zero partition. A plurality of U-shaped grooves are formed in the cylinder 10 in the longitudinal direction by a partition portion, and the number of the U-shaped grooves is equal to the number of the writing bodies 7.

On the cylinder 10, an inner shear 11 is fixed from the rear of the intermediate shaft 3 by press-fitting, bonding or the like, and is in contact therewith. The projection and the groove are designed so as to engage with each other so that the cylinder 10 and the inner shear 11 cannot relatively rotate.

[0010] A knock member 18 is arranged at the inner rear side of the inner sheath 11, and the knock member 18 is fixed to the crown 13 by screwing. The knock member 18 is moved from the state in which the writing body 7 is housed by knocking the rear shaft 4 (the state shown in FIG. 1) through the front end hole of the front shaft 1.
The tip of the is projected (state of FIG. 2), maintaining that state,
It has a cam mechanism that can store the cursive writing by the relative rotation operation of the center shaft 3 and the rear shaft 4. A pendulum 14 which is driven by gravity is disposed in the front of the middle jaw 11, and a large diameter portion 15 having a larger diameter than the front portion is formed behind the pendulum 14. 1
8 abuts. The fixing member 16 is regulated rearward by a resilient member 6 such as a spring. Therefore, when selecting the cursive writing, the entire composite writing instrument is tilted so that the tip 17 of the pendulum comes behind the centering of the desired cursive writing, and the rear shaft 4 is knocked forward.

In the writing implement of the above embodiment, at least the front shaft 1 of the barrel needs to be made of metal.
As the metal, a high-grade metal such as gold or silver, aluminum, or brass can be used. Of course, the center shaft 3 and the rear shaft 4 may be formed of metal. The reason why the shaft cylinder is made of metal is to give the composite writing instrument according to the present invention an added value such as a sense of quality and a good appearance and position it as a luxury product. In order to provide added value, it is also a preferable method to decorate the outer wall by spray coating, plating, or the like.

Further, it is necessary to form a resin layer 1a on at least the inner surface of the front shaft 1 of the shaft cylinder. The resin layer 1a is formed so as not to break the ballpoint pen tip when the composite writing implement is dropped by mistake. The resin layer may be formed not only on the inner surface of the front shaft 1 but also on the inner surfaces of the center shaft 3 and the rear shaft 4. Resin layer 1a
Various resins such as acrylic, urethane, epoxy, silicon, polyester, phenol, acrylmelamine, nylon, and vinyl can be used as a material for forming. As a method for forming the resin layer, means such as spray coating and electrodeposition coating can be employed. In the case of using such a method, when a paint containing the above-described various synthetic resins is used, formation can be more easily performed. The resin layer formed by this method has a thickness of 5
１００100 μm, and the form may be a film or a foam, a laminate of a plurality of materials, or the like.

When the composite writing instrument of this embodiment is dropped on the ground or the floor by mistake, the ball-point pen refill moves to the tip side, and the tip of the pen tip collides with the inner surface of the front shaft. Since the layer is formed, the impact at the time of collision is reduced, the ballpoint pen tip is prevented from being crushed, and the ink leakage caused thereby is prevented.

The resin layer can be variously modified in addition to the above embodiment. For example, a resin cylindrical body having a thickness of 50 to 300 μm can be molded, and the molded product can be fixed in the front shaft by a method such as adhesion or press fitting. In the case of using the molded body as described above, since the cross-sectional shape of the resin layer can be adjusted as compared with the case of the above-described embodiment, there is an advantage that a shape that further reduces the impact force at the time of falling can be adopted. .
Irregularities are formed in the inner hole of the resin layer, such as those in which the shape of the inner hole of the resin layer is gear-shaped or those in which the inner hole of the resin layer is wavy, as the cross-sectional shape that weakens the impact force when falling Are preferred.

[0013]

The composite writing instrument according to the present invention can prevent the tip of a ballpoint pen from being crushed even if it is accidentally dropped on the ground or the floor, so that no ink leakage occurs.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of a cursive case of an embodiment when stored.

FIG. 2 is a longitudinal sectional view of a writing state of the embodiment.

FIG. 3 is an enlarged sectional view of a distal end portion of FIG.

[Explanation of symbols]

 Reference Signs List 1 front shaft 1a resin layer 2 core 3 center shaft 4 rear shaft 5 repelling member 6 repelling member 7 writing body 8 core fixing pipe 9 core fixing 10 cylinder 11 medium shear 12 clip 13 crown 14 pendulum 15 large diameter portion 16 fixed Member 17 Tip 18 Knock member

Claims (2)

[Claims] At least one writing tool including at least one ball-point pen refill is arranged in a barrel, a desired writing tool is selected, and a writing portion of the writing tool appears and disappears from the tip of the barrel. A composite writing instrument, wherein at least a front portion of the barrel is formed of metal, and a resin layer is formed on an inner surface of the metal barrel. 2. The composite writing instrument according to claim 1, wherein the resin layer is formed by inserting and fixing a resin molded product in a shaft cylinder.