JP3144926U - Cap-type writing instrument - Google Patents

Abstract

Provided is a cap-type writing instrument that can prevent the opening end of a cap from coming into contact with a shaft cylinder when the cap is mounted or when the cap is inserted backward when the writing instrument is used, thereby preventing the appearance from being damaged.
A writing instrument comprising a writing instrument body 2 having a base 4 and a tail plug at both ends of a shaft tube 3 and caps that can be fitted to both ends of the shaft tube 3, and having a maximum outer diameter portion A of the base 4. And the minimum outer diameter portion B in the vicinity of the cap portion of the shaft cylinder 3 is A> B, the maximum outer diameter portion C of the tail plug, and the minimum outer diameter portion D in the vicinity of the tail plug adjacent portion of the shaft tube 3 Is C> D. The inner peripheral surface of the opening end of the cap is chamfered.
[Selection] Figure 2

Description

  The present invention relates to a cap-type writing instrument. Furthermore, the present invention relates to a cap-type writing instrument in which the cap can be inserted backward.

Conventionally, a cap-type writing instrument in which a tail plug is provided at the rear end of a shaft cylinder made of metal or resin has been disclosed (for example, see Patent Documents 1 and 2). The tail plug of the writing instrument is configured so that the shaft tube and the tail plug are flush with each other by making the portion protruding rearward of the shaft tube the same diameter as the outer diameter of the shaft tube.
JP 60-234898 A Japanese Utility Model Publication 3-31583

  Therefore, when the cap is inserted backward when using the writing instrument, the open end of the cap may come into contact with the shaft tube, and the outer peripheral surface of the shaft tube may be damaged. In particular, in a writing instrument in which the shaft tube is decorated by painting or transfer, the decorative part is peeled off, and the aesthetic appearance may be impaired.

  The present invention solves the above-mentioned problem, and prevents the opening end of the cap from coming into contact with the shaft cylinder when the cap is attached or when the writing instrument is used, thereby preventing the appearance from being damaged. The cap-type writing instrument which can be provided is provided.

The present invention is a writing instrument comprising a writing instrument body having a base at the tip of a shaft tube, and a cap that can be fitted to the writing tool body, wherein the maximum outer diameter portion A of the base and the vicinity of the base portion of the shaft cylinder A writing instrument comprising: a writing instrument main body having a tail plug at a rear end of the shaft cylinder; and a cap that can be fitted to both ends of the shaft cylinder. A writing instrument main body having a maximum outer diameter portion C of the stopper and a minimum outer diameter portion D in the vicinity of the tail plug adjacent portion of the shaft cylinder, C> D, a base and a tail plug at both ends of the shaft cylinder, and the shaft cylinder A writing instrument provided with caps that can be fitted to both ends, wherein the maximum outer diameter portion A of the base and the minimum outer diameter portion B in the vicinity of the base portion of the shaft cylinder satisfy A> B, and the tail plug The maximum outer diameter portion C and the minimum outer diameter portion D in the vicinity of the tail plug adjacent portion of the shaft tube are required to satisfy C> D.
Furthermore, the outer peripheral surface of the shaft cylinder is decorated by transfer or painting, the inner peripheral surface of the opening end of the cap is chamfered, and a ring member protrudes in the opening direction on the outer peripheral surface of the cap opening end. It is necessary that the portion of the ring member that comes into contact with the shaft tube is a curved surface, and that the end surface of the cap opening end is covered with the ring member.
In the present invention, “front” indicates the pen tip side, and “rear” indicates the tail plug side.

  According to claim 1 of the present invention, when the cap is inserted into the pen tip side, the cap can be inserted perpendicularly to the shaft tube, so that the open end of the cap does not contact the shaft tube. The possibility of damaging the shaft tube is eliminated.

  According to claim 2 of the present invention, when the cap is inserted into the rear end side, the cap can be inserted perpendicularly to the shaft tube, so that the open end of the cap does not contact the shaft tube. The possibility of damaging the shaft tube is eliminated.

  According to claim 3 of the present invention, when the cap is inserted into the pen tip side or the rear end side, the cap can be inserted perpendicularly to the shaft tube, so that the open end of the cap contacts the shaft tube. This eliminates the possibility of damaging the shaft tube.

  According to the fourth aspect, since the appearance is not damaged, the aesthetic appearance is not impaired even in a highly decorative writing instrument.

  According to the fifth aspect, even if the cap open end comes into contact with the base, the tail plug, the shaft tube, or the like, the contact portion can be prevented from being damaged.

  According to the sixth aspect, even if the cap opening end comes into contact with the base, the tail plug, the shaft tube, etc., the contact portion can be prevented from being damaged, and the decorativeness of the cap and the writing instrument as a whole can be improved.

  According to the seventh aspect, it is possible to prevent the contact portion from being damaged without processing the inner peripheral surface of the opening end portion of the cap body, and it is possible to improve the decorativeness of the cap and the writing instrument as a whole.

  The cap-type writing instrument of the present invention is a writing instrument comprising a writing instrument body having a cap or a tail plug at one end of a shaft tube, and a cap that can be fitted to one end of the shaft tube, or a cap and a tail plug at both ends of the shaft tube. A writing instrument body having a cap that can be fitted to both ends of the shaft tube, and a maximum outer diameter portion of the base and a minimum outer diameter portion in the vicinity of the mouthpiece adjacent portion of the shaft tube. It has a specific relationship, and the maximum outer diameter portion of the tail plug and the minimum outer diameter portion near the tail plug adjacent portion of the shaft tube have a specific relationship.

  The writing instrument main body has an exterior part composed of at least a shaft tube, a base, and a tail plug, and forms a base or a tail plug at one end of the shaft tube, or a base and a tail plug at both ends of the shaft tube. It is formed separately or integrally.

  As the shaft cylinder, those molded from various synthetic resins, those obtained by processing a metal, etc. can be used, and in particular, those in which the outer peripheral surface of the shaft cylinder is decorated by transfer or painting are preferably used. .

The base is set so that the maximum outer diameter portion of the base is larger than the minimum outer diameter portion in the vicinity of the portion connected to the base of the shaft tube (near the base adjacent portion).
As a result, when the cap is attached to the writing instrument body when not in use, the cap open end is in contact with the vicinity of the base adjacent to the cap, but in this plan, the cap open end contacts the base so that the entire cap is pivoted. It is guided to the center of the direction (so-called centering), and the opening end can be inserted into the cap without contacting the shaft tube.
Therefore, it is possible to prevent the cap opening end from coming into contact with the shaft cylinder when the cap is mounted, so that the vicinity of the base adjacent to the shaft cylinder is not damaged.

The maximum outer diameter portion of the tail plug is set to be larger than the minimum outer diameter portion in the vicinity of the portion connected to the tail plug of the shaft tube (near the tail plug adjacent portion).
As a result, when the writing instrument is used, when the cap is inserted backward to the rear end of the writing instrument body, the cap opening end is in contact with the vicinity of the tail plug adjacent portion, whereas in this plan, the cap opening end is in contact with the tail plug. Thus, the entire cap is guided to the center in the axial direction (so-called centering), and the open end can be inserted into the cap without contacting the shaft tube.
Therefore, it is possible to prevent the cap opening end from coming into contact with the shaft cylinder when the cap is inserted backward, so that the vicinity of the tail plug adjacent portion of the shaft cylinder is not damaged.

  The writing instrument body can be opened and closed by a refill configuration that incorporates an ink storage tube with a nib at the tip, a pen core type configuration that has an ink storage member, a filling type configuration that incorporates an ink occlusion body, a nib pumping, etc. Any form can be used as long as it can discharge the ink contained in the ink from the pen tip, such as a pumping form provided with a valve mechanism.

  Further, as the pen tip, a fiber tip, a felt tip, a plastic tip, or a ballpoint pen tip is used, and is practically used in the form of a marking pen, a ballpoint pen, or the like.

The cap has an opening having an inner diameter that can be fitted to both ends of the writing instrument body, and may be made of resin or metal. In particular, when it is made of metal, it is preferable to chamfer the inner peripheral surface of the opening end portion by post-processing such as cutting. Thereby, even if the cap opening end portion having high hardness comes into contact with the base, the tail plug, the shaft tube, etc., the contact portion can be prevented from being damaged.
Further, a decorative member can be improved by fitting a ring member to the outer peripheral surface of the cap opening end. In that case, it is preferable that the ring member is provided so as to protrude in the opening direction, and the portion (the inner end in the opening direction) of the ring member that comes into contact with the shaft cylinder is curved. Thereby, the damage at the time of contact can be prevented more effectively.

  Furthermore, the end surface of the cap opening end portion can be covered by making the opening direction end portion of the ring member thicker than the thickness of the cap body (that is, projecting in the cap inward direction). This eliminates the need for chamfering or the like on the opening end of the cap body. Further, when the cap is attached, the ring member comes into contact with the base, the tail plug, the shaft tube, etc., so that the contact portion can be more effectively prevented from being damaged.

An embodiment of the present invention will be described with reference to the following drawings.
FIG. 1 is a longitudinal sectional view of a cap-type writing instrument of the present invention, and FIG. 2 is an external view of the writing instrument body.

The cap-type writing instrument 1 includes a writing instrument body 2 having a ballpoint pen tip at a writing tip, and a cap 7 that protects the ballpoint pen tip.
The writing instrument body 2 includes a ball pen refill containing ink and a liquid stopper in an ink containing tube provided with a ballpoint pen tip as a pen tip 6 in a metal shaft cylinder 3 whose outer surface is coated. Further, a cap 4 is detachably provided above the shaft tube 3, and a tail plug 5 is adhesively fitted to the bottom.
In the base 4, the diameter A of the maximum outer diameter portion 41 is set larger than the diameter B of the minimum outer diameter portion in the vicinity of the base adjacent portion 31 of the shaft tube 3. In the tail plug 5, the diameter C of the maximum outer diameter portion 51 is set larger than the diameter D of the minimum outer diameter portion in the vicinity of the tail plug adjacent portion 32 of the shaft tube 3.

The cap 7 holds an inner cylinder 83 provided with a rubber seal 84 and a fitting projection inside a cylindrical metal cap body 8 whose outer peripheral surface is coated and opens at one end. In order to cover the end face 81 so that it is not exposed, a ring member 9 having a rear end thicker than the thickness of the cap body 8 is adhesively fitted. The ring member 9 has a peripheral surface processed into a curved surface by barrel polishing.
Further, a clip 85 is joined to the outer surface of the cap body 8.

When the cap 7 is mounted when the writing instrument body 2 is not used, the ring member 9 at the end of the cap opening comes into contact with the maximum outer diameter portion 41 of the base 4 by inserting the writing instrument body 2, and the entire cap 7 Since the ring member 9 is centered, the ring member 9 can be inserted and held in the cap without contacting the base adjacent portion 31 of the shaft tube 3.
Therefore, it can be used without damaging the periphery of the base adjacent portion 31 of the shaft tube 3 by mounting the cap.

When the writing instrument is used, when the cap 7 is inserted backward into the rear end of the writing instrument body 2, the ring member 9 comes into contact with the maximum outer diameter portion 51 of the tail plug 5, and the entire cap 7 is centered. It can be inserted and held in the cap without contacting the tail plug adjacent portion 3 of the tube 3 (FIG. 3).
For this reason, the periphery of the tail plug adjacent portion 32 of the shaft tube 3 is not damaged by inserting the cap backward.

FIG. 4 is a diagram showing another example of FIG. 3, and the cap 7 has a structure (chamfered portion 82) in which the inner peripheral surface of the open end is chamfered by cutting.
Thereby, when the cap 7 is inserted backward to the rear end of the writing instrument body 2, the chamfered portion 82 comes into contact with the maximum outer diameter portion 51 of the tail plug 5, and the entire cap 7 is centered. It can be inserted into the cap and fitted and held without contacting the tail plug adjacent portion 3 of the shaft tube 3.
For this reason, the periphery of the tail plug adjacent portion 32 of the shaft tube 3 is not damaged by inserting the cap backward.

It is a longitudinal cross-sectional view which shows one Example of the cap type writing instrument of this invention. It is an external view which shows a writing instrument main body. It is sectional explanatory drawing which shows a cap back insertion state. It is sectional drawing which shows the other example of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cap-type writing instrument 2 Writing instrument main body 3 Shaft cylinder 31 A base adjoining part (minimum outer diameter part)
32 Adjacent tail plug (minimum outer diameter)
4 base 41 maximum outer diameter portion 5 outer peripheral portion 51 maximum outer diameter portion 6 nib 7 cap 8 cap body 81 end face 82 chamfered portion 83 inner cylinder 84 rubber seal 85 clip 9 ring member

Claims (7)

  A writing instrument comprising a writing tool body having a base at the tip of the shaft tube, and a cap that can be fitted to the writing tool body, wherein the maximum outer diameter portion A of the base and the minimum outer diameter in the vicinity of the base portion of the shaft tube A cap-type writing instrument, wherein part B is A> B.   A writing instrument comprising a writing instrument main body having a tail plug at the rear end of the shaft cylinder, and caps that can be fitted to both ends of the shaft cylinder, wherein the maximum outer diameter portion C of the tail plug is adjacent to the tail plug of the shaft cylinder. A cap-type writing instrument, wherein a minimum outer diameter portion D in the vicinity of the portion satisfies C> D.   A writing instrument comprising a writing instrument body having a base and a tail plug at both ends of the shaft tube, and a cap that can be fitted to both ends of the shaft tube, wherein the maximum outer diameter portion A of the base is adjacent to the base of the shaft tube. The minimum outer diameter portion B in the vicinity of the portion is A> B, and the maximum outer diameter portion C of the tail plug and the minimum outer diameter portion D in the vicinity of the tail plug adjacent portion of the shaft tube are C> D. Cap-type writing instrument.   The cap-type writing instrument according to any one of claims 1 to 3, wherein an outer peripheral surface of the shaft cylinder is decorated by transfer or painting.   The cap-type writing instrument according to any one of claims 1 to 4, wherein the inner peripheral surface of the open end of the cap is chamfered.   The ring member is provided on the outer peripheral surface of the cap opening end so as to protrude in the opening direction, and the portion of the ring member that contacts the shaft tube is a curved surface. Cap-type writing instrument as described.   The cap-type writing instrument according to claim 6, wherein the ring member covers an end face of the cap opening end.

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