JP2512089Y2 - Writing instrument exterior - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) An exterior body of a writing instrument that is attached to the writing instrument body such that the writing section of the writing instrument body projects, the exterior body having an annular contact portion for the writing instrument body. The present invention relates to a device in which the abutment portion blocks communication between the internal space of the body and the air hole of the writing instrument main body. Here, as an example of a writing instrument, a ballpoint pen,
Examples include a small-tube writing instrument, a resin pen, an eyeliner, and a lip color.

(Prior Art) An exterior body of the type described above is disclosed, for example, in Japanese Utility Model Publication No. 60-178177. `` An outer surface step portion having a curved peripheral edge shoulder is provided at a slightly rear portion of the air hole in the refill, and an inner hole portion of a shaft cylinder or a mouthpiece storing the refill is airtightly attached to the outer surface step portion of the refill. The curved inner surface step portion is provided ". In addition, as the contact portion, there is a contact portion that does not satisfy the engagement relationship with the writing instrument main body but the press-fitting relationship.

(Problems to be solved by the invention) The exterior body is often required to have a decorative property or a high-class feeling. On the other hand, it is of course conceivable to use metal parts. Appropriate surface treatment such as plating can be easily performed.

However, the use of metal parts often not only causes molding problems and price problems, but also cuts off the communication between the internal space of the exterior body and the air holes of the writing instrument body, which is the intended aim. The ink in the pen tip and the writing instrument main body gradually dries and the handwriting becomes faint, or it may cause damage to the writing instrument main body.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a suitable one particularly when a metal tubular member is used. As long as it is a tubular member, it can be used at a relatively low cost, such as by extrusion molding or press molding. Of course, plating and the like are easy, and thin products can be easily prepared to reduce the weight of the product. However, the tubular member tends to have minute irregularities at the opening end, and if the inner edge of the opening end is used as the abutting portion, the communication between the internal space of the exterior body and the air hole of the writing instrument main body is ensured. Blocking is obstructed, and the sharp shape also causes damage to the main body of the writing instrument. Sufficient shaping to overcome these obstructs the advantage of being inexpensive.

(Means for Solving the Problem) The present invention is an exterior body of a writing instrument that is attached to the writing instrument body so as to project the writing section of the writing instrument body, the exterior body having an annular contact portion for the writing instrument body. In which the contact between the internal space of the writing instrument and the air hole of the writing instrument main body is blocked by this abutting portion, at least a part of the exterior body is made of a metallic cylindrical member, and an annular inward deformation projection is formed on the cylindrical member. The gist is an exterior body of a writing instrument that is provided with a portion and has the inwardly deforming protruding portion as the contact portion.

(Example) An example is shown in FIG. 1 and FIG.

Reference numeral A indicates a writing instrument body. Although the drawing shows a ballpoint pen body using a general water-based ink containing an ink occlusion body (not shown) inside, of course, a so-called raw ink type using a temporary ink reservoir member, The type including the structure may be appropriate. Reference numeral 1 indicates the opening of the air hole.

Further, reference numeral B indicates an exterior body, which is composed of a front member 2 and a rear member 3 which are detachably screwed together. The writing instrument main body A can be replaced by screwing and attaching the front member 2 and the rear member 3. Although not shown, the writing instrument main body A is provided with an elastic force from the right side to the left side of the drawing by an elastic body which is integrally formed in the inner hole of the rear member 3 or accommodated as a member, or The front member 2 and the rear member 3 are accommodated without rattling by receiving a clinging force due to screwing.

The front member 2 of the exterior body B, which projects the writing portion of the writing instrument main body A so that the opening 1 of the air hole is also exposed, is made of a metal tubular member. Then, as shown in an enlarged view in FIG. 2, an annular inwardly deforming protrusion 6 is formed at a position distant from the opening end 5 of the front portion 4 having a gradually smaller diameter and in the vicinity thereof.
Are formed. The inwardly deforming protrusion 6 press-fits and abuts the tapered outer wall of the writing instrument main body A, and thus prevents the writing instrument main body A from slipping forward to satisfy the above-described rattle-free accommodation and the internal space of the exterior body B. And the communication with the air hole of the writing instrument main body A is blocked. The front member 2 of this example is shown by consciously being formed by press molding which tends to have minute irregularities at the opening end, but it may be formed by extrusion molding. The one-dot chain line shown in FIG. 1 shows an example of cap mounting.

As described above, the example has been described, but various changes can be made without changing the gist. For example, the opening 1 of the air hole
Need only be located in front of the inwardly deformable protrusion 6, and the inwardly deformable protrusion 6 is covered by the front member 2 such as when the inwardly deformable protrusion 6 has a sufficient distance from the opening end 5 of the front member 2. Can also be Further, although the front member 2 is entirely made of a metal tubular member, the front member 2 is made into a multi-member, and a part of the front member 2 is made into an injection-molded product made of synthetic resin, for example, a portion to be screwed with the rear member 3. A metal tubular member may be used, or, for example, the rear end portion of the writing instrument main body A may be press-fitted into the rear end of the front member 2 in place of the rear member 3 so that the front member 2 becomes the entire exterior body B. It can be attached by screwing, concavo-convex fitting, or the like.

(Effects of the Invention) An exterior body of a writing instrument of the present invention is an exterior body of a writing instrument that is attached to the writing instrument body so as to project the writing section of the writing instrument body, and has an annular contact portion with respect to the writing instrument body. In this structure in which the contact between the internal space of the body and the air hole of the writing instrument body is blocked, at least a part of the exterior body is a metal tubular member, and the tubular member is annularly deformed inward. Since the protrusion is provided and the inwardly deformed protrusion serves as the contact portion, the use of a metal tubular member can provide a relatively inexpensive and lightweight yet high-grade appearance. It is easy and the inwardly deforming protrusion can be easily formed by pressing and deforming from the outside, so that the cost advantage of using this metal tubular member can be effectively exerted, and the inwardly deforming protrusion is also effective. Portion of the protruding portion (surface of the inner surface of the tubular member ) Has a gentle roundness, so it is possible to suppress damage to the writing instrument main body as much as possible, and it is possible to secure a reliable cutoff of the communication between the internal space of the exterior body and the air hole of the writing instrument main body. It is possible to suppress the ink in the main body from gradually drying and fading handwriting as much as possible.

[Brief description of drawings]

FIG. 1 is a fragmentary sectional view showing an embodiment of the present invention, and FIG.
The figure is an enlarged view of part II in Fig. 1. A ... Writing instrument main body, 1 ... Air hole opening, B ... Exterior body, 2 ... Front member (an example of a metal tubular member), 3 ... Rear member, 4 ... Front member front portion 5 ... Open end, 6 ... Inward deformation protrusion.

Claims (1)

(57) [Scope of utility model registration request] 1. An exterior body of a writing instrument which is attached to the writing instrument body so as to project the writing section of the writing instrument body, and which has an annular contact portion with respect to the writing instrument body, and has an inner space of the exterior body and air of the writing instrument body. In such a structure in which communication with the hole is blocked by the abutting portion, at least a part of the exterior body is made of a metal tubular member, and the tubular member is provided with an annular inwardly deforming protruding portion, which is inwardly deformable. An exterior body for a writing instrument, which has a protruding portion and serves as the contact portion.