JP2010264638A - Writing implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a writing implement surely and stably obtaining good writing feelings with cushioning property and supple feelings and reduced in breaking of a lead, damage of a writing body, or the like by forming a mouthpiece body to tilt around a specific position determined according to a tilting direction, as a fulcrum when the mouthpiece body tilts with respect to a shaft body. <P>SOLUTION: The writing implement includes the shaft body 2 and the mouthpiece body 51. The mouthpiece body is composed by integrally connecting a mouthpiece body 12, an inner piece 15 and a rear piece 17. A tip part 18 of the rear piece abuts on an inward flange 7 formed in a hole 6 of the shaft body. A sliding member 57 is arranged to be axially slidable within the hole of the shaft body. A spherical working surface 53 of the inner piece abuts on a tip side taper part 58 of the sliding member. A compression coil spring 28 is disposed between the rear end of the sliding member and the front side face of the inward flange to always energize the mouthpiece body toward the tip side of the shaft body through the sliding member. When writing, the mouthpiece tilts around a position on the inward flange determined by the working direction of force, as a fulcrum, and in association with this, the sliding member is moved backward against the spring. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a writing instrument such as a mechanical pencil, a ballpoint pen, a marker pen, and the like, and more particularly to a writing instrument in which a base can be tilted in an arbitrary direction with respect to a shaft body.

  Writing instruments such as mechanical pencils, ballpoint pens, marker pens, etc. have a base attached to the shaft body. Guides the cursive script to be inserted. The base is usually fixed to the shaft body. In this case, it has been pointed out that the writing body or writing part is not flexible at the time of writing, and the writing quality is inferior to that of a fountain pen. In addition, it has been pointed out that the mechanical pencil core is broken by pressing a finger, and that the tip of the cursive body is damaged by a ballpoint pen, a marker pen, or the like.

Japanese Utility Model Application No. 3-85730 (Japanese Utility Model Application Laid-Open No. 5-41878) points out the above points, and as a solution to the problem, an elastic body is provided between the shaft body and either or both of the base and the intermediate screw. Is disclosed. As a result, the elastic body functions as a cushion when writing, and the flexibility is generated, so that it is possible to obtain a soft writing taste.

However, in this configuration, when the base is tilted, it is not configured to tilt with a specific position as a fulcrum. For this reason, the fulcrum is not determined, the tilting state changes depending on the angle of the writing instrument to the paper surface, how to apply force (strength, direction, etc.), and how it moves, and it is not stable, and sometimes sufficient cushioning is not obtained. There may be cases. Accordingly, it cannot be said that the writing quality can always be maintained in a good state, and various changes are made, and the writing quality is never good.

No. 3-85730 (No. 5-41878)

  The present invention has been made in view of the problems of the conventional example described above, and when the writing part is tilted, it always operates with a certain position as a fulcrum, and a stable cushioning property is always produced and a good writing quality is obtained. It is an object of the present invention to provide a writing instrument that can improve the prevention of breakage and the prevention of damage to the cursive body.

In order to solve the above problems, the writing instrument according to the present invention has the following configuration. Specifically, a cylindrical shaft main body having at least a front end side opened, a front end portion disposed on the front end side of the shaft main body and positioned on the outer side of the shaft main body, and a shaft portion into which at least the rear end side is inserted into the hole of the main body. The writing tool further includes a biasing member that biases the base body toward the distal end side of the shaft body. The shaft body is formed with a receiving portion formed integrally with the shaft body in the hole, and the base is in contact with the receiving portion, so that the base moves toward the tip of the shaft body. A blocking contact portion is formed. The diameter of the hole in the shaft body is larger than the outer diameter of the shaft portion of the base. And a biasing member makes force act on a nozzle | cap | die body in the action part formed along the circle centering on the axial center of the axial part of a nozzle | cap | die body.
In that case, the urging member can be disposed so as to surround the shaft portion of the base.
Furthermore, the biasing member can be disposed in the hole of the shaft body.
Further, the urging member can be arranged so as to extend in the axial direction of the base body, and can be received by both ends abutting against receiving portions formed on the shaft main body and the base body, respectively.
When the urging member is disposed in the hole of the shaft main body, the following configuration can be adopted. That is, the writing instrument further includes a slide member disposed in the hole of the shaft main body so as to be slidable in the axial direction of the shaft main body, and the slide member is opposed to the action portion at the action portion provided on the distal end side. The biasing member extends in the axial direction of the base body and is disposed at both ends of the receiving part provided on the rear end side of the slide member and the receiving part formed on the shaft body. Are brought into contact with each other, and the base is urged by the urging member via the slide member.
In this case, the action portion of the base body can be formed in a spherical shape, and the action portion of the slide member can be formed in a tapered shape whose diameter decreases toward the rear end side or as a spherical recess.
In the above case, the writing tool can further be shrunk and restored by being compressed by the base when the base tilts with respect to the axis of the shaft body with the receiving part of the shaft body as a fulcrum. A cushion material made of a flexible elastic material may be provided.
In that case, the cushion material is formed in a cylindrical shape, and can be arranged so as to cover the outer periphery of the shaft portion of the base within a predetermined range in the axial direction of the front end surface of the shaft body.
Further, the cushion material is formed in a ring shape, the base body includes a shoulder portion that extends in the radial direction of the shaft portion between the tip portion and the shaft portion, and the cushion material is formed of the shoulder portion and the tip of the shaft main body. It can also be arranged between the side end faces.
Further, the cushion material includes a tubular portion and a flange portion that extends radially outward at the distal end side of the tubular portion, and the base body is disposed between the distal end portion and the shaft portion in the radial direction of the shaft portion. The cylindrical part of the cushion material is arranged so as to cover the outer periphery of the base part of the base, and the collar part can be arranged between the shoulder part and the end surface on the front end side of the shaft body. .
In the case where the biasing member is disposed so as to surround the shaft portion of the base body, the base body includes a shoulder portion extending in the radial direction of the shaft portion between the tip portion and the shaft portion, and the biasing member is Further, it can be disposed between the shoulder portion and the end surface on the front end side of the shaft main body.

According to the present invention, a tilted point with respect to the shaft center of the shaft body with the point determined at the time of writing as a fulcrum, a good writing feel with a cushioning property can be obtained reliably and stably. Core breakage, cursive damage, etc. are reduced.

It is a fragmentary longitudinal cross-section which shows the mechanical pencil which concerns on 1st Embodiment. It is a fragmentary longitudinal cross-section which shows the mechanical pencil which concerns on 2nd Embodiment. It is a fragmentary longitudinal cross-section which shows the ball-point pen which concerns on 4th Embodiment. It is a fragmentary longitudinal cross-section which shows the mechanical pencil which concerns on 5th Embodiment. It is a fragmentary longitudinal cross-section which shows the marker pen which concerns on 6th Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. However, the following embodiments are exemplarily shown, and the scope of the present invention is not limited thereto.

  FIG. 1 is a partial longitudinal sectional view showing the writing instrument according to the first embodiment of the present invention, specifically, the tip side of the mechanical pencil 1. In the figure, reference numeral 2 denotes a shaft body, and the rear shaft member 3 and the front shaft member 4 assembled and integrated with the rear shaft member, and on the outer periphery of the front shaft member and the rear shaft member to a predetermined range. And a grip 5 made of an attached rubber or the like. The front end side of the shaft body 2 (hereinafter, “front end side” refers to the left side in the drawing, that is, the side on which the cap body 11 described later is located, and the opposite side is referred to as “rear end side”). A through hole 6 is formed in the main body 2, and a known knock (not shown) is attached to the rear end thereof. An inward flange 7 that extends radially inward is formed at a predetermined axial position of the front shaft member 4. This functions as a receiving portion that receives a base body, which will be described later, and prevents movement toward the tip side.

Reference numeral 11 denotes a base body disposed on the distal end side of the shaft main body 2, and includes a base body 12. The base body 12 includes a distal end portion 13 whose diameter gradually increases toward the rear end side, and a shaft-shaped insertion portion 14 that is smaller in diameter than the rear end of the distal end portion 13 and is inserted into the hole 6 of the shaft body 2. ing. An intermediate piece 15 formed on the hollow shaft is integrally attached to the rear end of the insertion portion 14 by screw connection or other appropriate means. An outer flange 16 that extends radially outward is formed at a location where the rear end of the shaft portion 14 abuts. The rear end side of the intermediate piece 15 extends through the center hole of the inner flange 7 formed in the front shaft member 4, and the rear piece 17 also formed on the hollow shaft is screwed to the rear end side. It is attached integrally by appropriate means. The front end face of the rear piece 17 is in contact with the rear end face of the inner flange 7, and the front end portion is a contact portion 18. The base body 12, the middle piece 15, and the rear piece 17 constitute the base body 11, and the insertion portion 14, the middle piece 15, and the rear piece 17 of the base body 12 constitute the shaft portion 19 of the base body 12. The base body 11 is disposed concentrically with the shaft body 2. Both ends of the inner flange 7 and the outer flange 16 are received, and a compression coil spring 28 is disposed so as to surround the outer periphery of the intermediate piece 15. Accordingly, the base body 11 is constantly urged toward the front end side in the figure, and the abutting portion 18 abuts against the inward flange 7 and is prevented from moving toward the front end side by the inward flange 7.

As shown in the figure, the base body 11 has a through hole 20 passing through the center over the entire length in the axial direction. A known guide pipe 21 and a core detent 22 are fixed to the distal end side. Reference numeral 23 is also a known core tank, and is inserted into the base body 11 from the rear shaft member 3 side. A known spring mechanism (not shown) acting on the core tank is arranged in the hollow portion 24 of the base body 11, and a known chuck ring (not shown) is also arranged in the hollow portion 25. The core is fed in cooperation with (not shown). The illustration of the core is also omitted.

As can be seen from the drawing, the outer diameter of the shaft portion 19 of the base body 11 is smaller than the diameter of the hole 6 of the shaft body 2 over the entire length, and between the outer periphery of the shaft portion 19 of the base body 11 and the inner periphery of the shaft body 2. Is provided with a gap. Reference numeral 26 denotes a sleeve as a short cylindrical cushion material, which is made of rubber or other elastic material that can be appropriately compressed and restored, and has a front end formed between the tip portion 13 of the base body 12 and the insertion portion 14. The insertion portion 19 is attached so as to cover the shoulder portion 27 serving as a boundary and a part of the shoulder portion 27 is inserted into the hole 6 of the shaft body 2. A slight clearance is provided between the outer periphery of the sleeve 26 and the inner periphery of the shaft body 2. However, you may make it contact | connect in an uncompressed state.

  In the mechanical pencil 1 having the above configuration, when writing, it is normally inclined to the paper surface, and the entire base body 11 is the center of the shaft body 2 by the force acting on the base body 11 through the core. Can be tilted against. That is, since the contact portion 18 of the base body 11 is in contact with the rear end surface of the inner flange 7 of the shaft body 2 by the action of the spring 28, the base body 11 is a point on the rear side surface of the inner flange 7. As a fulcrum, it tilts with respect to the axial center of the shaft body 2 so as to touch the direction of the force acting on the tip. At this time, since the sleeve 26 functions as a cushion, the tilting operation becomes smooth, and a good writing feel that can be felt flexibly is obtained. And since the clear fulcrum is provided unlike the above-mentioned prior art example, the tilting operation is stable. Further, since the spring acts at a point of action over the entire circumference along a circle centered on the axis of the base 11, the spring can be similarly tilted in any direction, and promptly when the force is removed. It is possible to return to the original straight state. In this embodiment, the compression coil spring is used as the urging member. However, for example, a sleeve made of an elastic material that can be compressed and restored, such as rubber, may be used in a compressed state.

  FIG. 2 is a partial longitudinal sectional view showing a mechanical pencil 31 according to the second embodiment. In this embodiment, the difference from the first embodiment is that a sleeve 32 with a flange portion extending outward is used in place of the sleeve 26, and other configurations are the same as those in the first embodiment. Since it is the same as the form, the same number is attached | subjected to a corresponding member and the description is abbreviate | omitted.

The sleeve 32 as a cushion material includes a cylindrical portion 33 and a flange portion 34 that spreads outward from the front end portion thereof. The cylindrical portion 33 is located in the hole 6 of the shaft body 2, and the flange portion 34 is disposed between the shoulder portion 27 of the base body 11 and the tip end surface 2 a of the shaft body 2. A slight gap is provided between the outer periphery of the cylindrical portion 33 and the inner peripheral surface of the hole 6 of the shaft body 2 and between the front end surface of the flange portion 34 and the shoulder portion 27, but in an uncompressed state. You may make it contact. In this embodiment, the tilting operation of the base body 11 is the same as that in the first embodiment except that two cushions are provided.

In the second embodiment, if the thickness of the flange portion 34 is increased and the flange portion 34 is disposed between the distal end surface 2a of the shaft body 2 and the shoulder portion 27 in a compressed state, the material has an appropriate hardness. It is possible to cause a sufficient urging force to act on the base body 11 by selecting the one, and in this case, the collar portion 34 functions as both a urging member and a cushion material, and the compression coil spring 28 is omitted. It becomes possible. In this case as well, as in the case of the coil spring, there is an action point along the circumference of the circle centered on the axis of the base 11, so that it can tilt smoothly in any direction. The return to the straight state is also performed smoothly.

As a third embodiment, instead of the hooked sleeve used in the second embodiment, a ring-shaped member consisting only of the hook portion can be used as a cushioning material. In that case, it is of course possible to adopt a shape like an O-ring. Further, it is possible to increase the thickness so as to have a function as an urging member and a cushion member as described in the second embodiment. It is also possible to arrange a compression coil spring at this position instead of such a ring.

  FIG. 3 is a partial longitudinal sectional view showing the fourth embodiment. Although the writing instrument according to this embodiment differs from the first embodiment in that it is a ballpoint pen 41, the shaft main body 2 and the base 11 have the same configuration as the first embodiment. In other words, reference numeral 42 denotes an ink tank, and reference numeral 43 denotes a writing unit that is attached to the tip of the ink tank and holds the ball. Corresponding members for the shaft body 2 and the base body 11 are given the same reference numerals as those in the first embodiment, and description thereof is omitted. A description of the tilting operation is also omitted.

FIG. 4 is a partial longitudinal sectional view showing a fifth embodiment. This writing instrument is the same mechanical pencil as in the first to third embodiments. The mechanical pencil 50 is different from the first embodiment in that the shape of the intermediate piece 52 constituting the base body 51 is different and the slide member 57 is used. Therefore, the same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

The inner piece 52 is integrally attached to the base body 12 at an end portion thereof by appropriate means such as screw connection. In place of the outer flange 16 provided in the first embodiment, a hemispherical portion 53 having a convex rear side is formed. Then, the shaft portion 54 extends rearward from the top portion, extends through the center hole of the inner flange 7 of the shaft body 2, and is integrally coupled to the rear piece 17 by appropriate means such as screw coupling.

The slide member 57 is a hollow cylindrical member having the same outer diameter throughout the entire length, and is slidable in the axial direction along the inner periphery of the front shaft member 4. The inner peripheral side is provided with a tapered portion 58 that gradually decreases in inner diameter as it goes rearward, a small diameter portion 59 having a constant diameter, and a large diameter portion 61 connected thereto via a shoulder portion 60 on the distal end side. The spring 28 is disposed in a compressed state between the shoulder 60 of the slide member 57 and the inner flange 7 of the shaft body 2. Accordingly, when the base 51 tilts with one point on the inner flange as a fulcrum, the slide member 57 moves backward against the force of the spring 28. At this time, the spring 28 also functions as a cushion material. In the case of this embodiment, the force transmission by the spherical surface and the tapered portion of the middle piece 52 and the slide member 57 is utilized, so that the tilting and returning operation to the straight state is surely and smoothly performed. In addition, the strength of the spring 28 is changed according to the thickness (strength) of the core to be used, and even if the thickness of the core is different, good writing quality is obtained, and the degree of core breakage is the same Decrease. In this embodiment as well, it is possible to use the cushion material used in the first to third embodiments. Instead of the tapered portion 58, it may be formed as a spherical recess.

FIG. 5 is a partial longitudinal sectional view of a writing instrument according to the sixth embodiment. The writing instrument is a marker pen 71 and includes a writing body 72 including a felt writing section 73 and an ink tank 74. Since the shaft body 2, the base body 51, and the slide member 57 have the same configuration as that of the fifth embodiment, the same members are denoted by the same reference numerals, and the description thereof is omitted. Further, since the tilting and returning operations of the base body 51 are also apparent from the description in the fifth embodiment, they are also omitted.

  In the first to fourth embodiments described above, the portion where the rear piece 17 and the inner flange 7 are in contact with each other is the hemisphere which is the action portion in contact with each other in the fifth and sixth embodiments. A configuration similar to the shape portion 53 and the taper portion 58 (or a spherical recess) can be employed. That is, the front end portion of the rear piece 17 may be formed in a hemispherical shape or a circular arc shape, and may be formed in a tapered or hemispherical shape or a circular arc-shaped recess connected to the center hole on the rear end surface of the inner flange 7. Alternatively, they may be formed on opposite members. Thereby, the operation | movement which returns to a straight state after the nozzle | cap | die 11 tilts becomes smoother.

Claims (11)

  A cylindrical shaft main body having an opening at least on the front end side, a front end portion disposed on the front end side of the shaft main body and positioned outside the shaft main body, and a shaft portion into which at least the rear end side is inserted into the hole of the main body. A writing instrument comprising: a base body provided; and a writing body that is inserted into the base body from the shaft main body side, wherein the writing tool further includes a biasing member that biases the base body toward the distal end side of the shaft main body. The shaft body is formed with a receiving portion formed integrally with the shaft body in the hole, and the base body is in contact with the receiving portion, whereby the tip of the shaft body of the base body is formed. A contact portion that is prevented from moving to the side is formed, the diameter of the hole of the shaft body is larger than the outer diameter of the shaft portion of the base body, and the biasing member is formed of the shaft portion of the base body In the action part formed along a circle centered on the axis, the mouth Characterized in that it is configured to exert a force on the body, the writing instrument.   The writing instrument according to claim 1, wherein the biasing member is disposed so as to surround the shaft portion of the base.   The writing instrument according to claim 2, wherein the biasing member is disposed in the hole of the shaft body.   4. The writing instrument according to claim 3, wherein the urging member is disposed so as to extend in an axial direction of the base body, and both ends thereof are in contact with receiving portions respectively formed on the shaft main body and the base body. Characteristic writing instrument. The writing instrument according to claim 3, further comprising a slide member disposed in the hole of the shaft main body so as to be slidable in the axial direction of the shaft main body, and the slide member is provided on the distal end side. The working portion is in contact with the working portion of the base opposite to the working portion, and the biasing member extends in the axial direction of the base and is provided on the rear end side of the slide member. A writing instrument, characterized in that both ends abut on a portion and a receiving portion formed on the shaft main body, and the base is biased by the biasing member via the slide member. 6. The writing instrument according to claim 5, wherein the action portion of the base is formed in a spherical shape, and the action portion of the slide member is formed as a tapered or spherical recess whose diameter decreases toward the rear end side. Writing instrument, characterized by   The writing instrument according to any one of claims 3 to 6, wherein the writing instrument further includes the base when the base body tilts with respect to the axis of the shaft main body with the receiving portion of the shaft main body serving as a fulcrum. A writing instrument comprising a cushion material made of an elastic material capable of contraction and restoration, which is compressed by a body to perform a cushioning action.   8. The writing instrument according to claim 7, wherein the cushion material is formed in a cylindrical shape and is disposed so as to cover the outer periphery of the shaft portion of the base within a predetermined range in the axial direction of the front end surface of the shaft body. Writing instruments.   8. The writing instrument according to claim 7, wherein the cushion material is formed in a ring shape, and the base body includes a shoulder portion extending in a radial direction of the shaft portion between the tip portion and the shaft portion, and the cushion material. Is disposed between the shoulder and the end surface of the shaft main body.   9. The writing instrument according to claim 8, wherein the cushion material includes a cylindrical portion and a flange portion that extends radially outward on a distal end side of the cylindrical portion, and the base includes a tip portion and a shaft portion. There is a shoulder portion extending in the radial direction of the shaft portion, and the cylindrical portion is disposed so as to cover the outer periphery of the shaft portion of the base, and is disposed between the shoulder portion and the end surface on the front end side of the shaft body. Writing instrument, characterized by   3. The writing instrument according to claim 2, wherein the base includes a shoulder portion that extends in a radial direction of the shaft portion between the tip portion and the shaft portion, and the biasing member includes the shoulder portion and the shaft body. A writing instrument, which is disposed between the end face and the end face.

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