JPH0568683U - Writing instrument cap - Google Patents

Abstract

(57) [Abstract] [Purpose] When the shaft cylinder and the lid of the cap both consist of a straight bottomed metal pipe, fit securely when the cap is fitted to the rear end of the shaft cylinder during writing. A writing instrument cap is provided. [Structure] In a writing instrument cap fitted to a shaft cylinder made of a straight bottomed metal pipe, a cap 1 also made of a straight bottomed metal pipe has an abutment side 1
A small fitting projection 4 is formed by recessing a metal pipe on the back side of the clip 3 in the vicinity of a, and when the cap is fitted to the tail end side of the barrel during writing, this fitting protrusion is the surface of the barrel. Try to press it against.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a writing instrument cap, and more particularly to a writing instrument cap fitted to a barrel made of a straight bottomed metal pipe.

[0002]

[Prior art and its problems]

 In writing instruments, not only the writing function but also design elements are considered important, so various external designs are designed. However, a simple shape is often adopted as one of the preferred designs, and both the barrel and the cap lid are molded with a straight metal pipe with a bottom to make a long and slender writing instrument. is there. In such a writing instrument, an inner cylinder made of synthetic resin is arranged in the lid of the cap, and when the cap is fitted to the tip side of the shaft cylinder when not in use, the inner cylinder seals the pen. At this time, since the engagement protrusion on the inner cylinder abutment side engages with the step portion of the front end attached to the tip of the shaft cylinder, the cap is firmly attached to the writing instrument body and does not fall off unexpectedly. . At the time of writing, the lid of this cap is fitted to the rear end side of the barrel, but since the barrel and the lid of the cap are both made of a straight metal pipe, there is no place where they can be firmly engaged. Moreover, the sliding resistance is small because of the metal pipes, and the fitting is unstable, which makes it difficult to write.

[0003]

[The purpose of the device]

 Therefore, the present invention provides a writing instrument cap that is firmly fitted when the cap is fitted to the rear end side of the shaft cylinder when writing, when the shaft cylinder and the lid of the cap are both straight bottomed metal pipes. The purpose is to provide.

[0004]

[Constitution of the device and its action]

 The structure of the present invention is a writing instrument cap fitted to a shaft cylinder made of a straight bottomed metal pipe, in the vicinity of the abutment side of the lid body of the same straight bottomed metal pipe and on the back side of the clip. The metal pipe is recessed in the to form a minute fitting protrusion, and when the cap is fitted to the tail end side of the barrel during writing, the fitting protrusion is pressed against the barrel surface. Is.

That is, when the cap is fitted to the tail end side of the barrel during writing, the minute fitting protrusions formed on the lid of the cap are brought into pressure contact with the surface of the barrel, so that the fitting fits firmly and the writing is performed. Does not hinder. Further, since the position where the fitting protrusion is formed is on the back side of the clip, the recessed portion cannot be seen from the outside, and the simple design is not hindered.

[0006]

【Example】

 The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 shows an example in which the cap according to the present invention is attached to the main body of a writing instrument of a fountain pen. In FIG. 1, the tip 6 is fixed to the tip of the barrel 5, and the pen body 7 projects from the tip of the tip 6. There is. Then, the ink in the ink cylinder housed in the barrel 5 is an ordinary fountain pen which is transmitted to the pen body 7 through the pen core having an ink retaining function and used for writing. It is slenderly molded with a straight bottomed metal pipe. It should be noted that this writing instrument itself is not limited to a fountain pen, and it is obvious that it may be a writing instrument such as a ballpoint pen or a marking pen.

The lid 1 of the cap fitted into the main body of the writing instrument of this fountain pen is formed of a straight bottomed metal pipe like the barrel 5, and the inner diameter of this metal pipe constitutes the barrel 5. It has a slender shape slightly larger than the outer diameter of the metal pipe. Then, the clip 3 is attached to the lid 1, the synthetic resin inner cylinder 2 is arranged in the lid 1, and when not in use, the pen body 7 is sealed by the inner cylinder 2 as shown in FIG. The tip of the inner cylinder 2 fits into the front opening 6. As shown in FIGS. 2 and 3, a minute fitting projection 4 is formed on the back side of the clip 3, that is, at a position facing the clip 3, in the vicinity of the abutment side 1a of the lid 1. The fitting projection 4 is formed by recessing a metal pipe forming the lid 1 in a groove shape extending from the outer peripheral side in the axial direction, and since the fitting projection 4 directly fits with the shaft cylinder 5, the surface is mirror-finished. , A smooth protrusion that does not scratch the surface of the barrel 5. Further, since the position where the fitting protrusion 4 is formed is on the back side of the clip 3, the recessed portion is hidden by the clip 3 and hardly visible.

Then, at the time of writing, the lid 1 is fitted to the tail end side of the barrel 5. At this time, the fitting protrusion 4 slides on the surface of the barrel 5 and comes into pressure contact therewith. Therefore, even though both the lid 1 and the barrel 5 are made of straight metal pipes, the cap is firmly fitted to the main body of the writing instrument and does not hinder writing.

[0009]

[Effect of the device]

 As described above, in the cap of the present invention, a minute fitting protrusion is formed by recessing the metal pipe near the abutment side of the lid body of the straight bottomed metal pipe and on the back side of the clip. Therefore, when the cap is fitted on the tail end side of the barrel during writing, the fitting protrusion presses against the surface of the barrel, which is a straight bottomed metal pipe, and can be fitted firmly.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view of a main part.

3 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Lid 1a Joint Side 2 Inner Cylinder 3 Clip 4 Fitting Protrusion 5 Shaft Cylinder 6 Tip Port 7 Pen Body

Claims (1)

[Scope of utility model registration request] 1. A writing instrument cap fitted to a barrel made of a straight bottomed metal pipe, wherein the metal pipe is on the back side of the clip in the vicinity of the abutment side of the lid body of the straight bottomed metal pipe. The writing tool cap, wherein the fitting projection is pressed against the surface of the barrel when the cap is fitted to the tail end side of the barrel during writing.