JP5932412B2 - Intrusive writing instrument - Google Patents

Description

  The present invention relates to a retractable writing instrument in which a writing body is accommodated in a shaft cylinder.

  Conventionally, as a retractable writing instrument, for example, as disclosed in Japanese Patent Application Laid-Open No. 11-147390 “Composite Feeding Tool”, by sliding the raised portion of one sliding body in the direction of the front opening of the front shaft, The locking part formed on the end is locked to the locking part formed on the shaft cylinder, and the writing tip of the writing body is projected from the tip opening, and the raised part of the other sliding body is moved to the front shaft. By sliding in the direction of the tip opening, the release protrusion of the other sliding body comes into contact with one sliding body, and the locking portion of one sliding body locked to the locking portion is engaged and disengaged. The writing tip is inserted into the tip opening, and the other sliding body is advanced to keep the other locking portion locked to the stopping portion, thereby maintaining the protruding state of the writing tip of the writing body. A ballpoint pen with an in / out mechanism that allows you to select a part Fill the like, multicore writing instrument such as the sliding housing structure into the barrel in a plurality of writing bodies are disclosed. In such an in / out type writing instrument, in view of being pinched in a pocket or the like, an in / out type writing instrument provided with a clip is also well known.

  Japanese Patent Laid-Open No. 8-332798, "writing instrument", a holder is provided at the rear end of the shaft cylinder, and an elastic body such as an eraser is detachably attached to the holder, and a vent hole is provided in the holder and the eraser. A writing instrument is disclosed.

JP-A-11-147390 JP-A-8-332798

  However, the conventional writing instrument such as the above-mentioned Patent Document 2 has a problem that the elastic body is easily damaged because the strength of the elastic body is reduced because the through-hole is provided in the elastic body such as an eraser. .

  In addition, since the conventional retractable writing instrument such as Patent Document 1 described above has a large tangent angle between the elastic body and the clip with respect to the axial center of the shaft cylinder, the paper surface and the clip easily come into contact with each other when the elastic body is used. There is a problem that it is difficult to use an elastic body because the angle at which the elastic body is used is limited.

  In view of these problems, in order to reduce the angle of the tangent line between the elastic body and the clip, it is necessary to reduce the amount of protrusion protruding outward from the axial tube of the clip, and the longitudinal direction between the rear end of the clip and the front end of the elastic body. However, the former is used as a writing instrument because the gap between the clip and the barrel becomes smaller and it is difficult to hold a thick object such as a pocket, and the latter increases the overall length of the writing instrument. There was a problem that it would be a difficult structure.

  An object of the present invention is to provide a retractable writing instrument having a clip, which is easy to use an elastic portion provided at the rear end portion of the shaft cylinder and is easy to carry when moving.

To achieve the above object, according to the present invention, a cursive body is urged and arranged in a shaft cylinder by a coil spring in the direction of the rear end of the shaft cylinder, and a clip is mounted on a clip mounting portion provided on the shaft cylinder. In addition, in the retractable writing instrument capable of retracting the writing part of the writing body by operating the clip or the operating body, a crown is detachably attached to the rear end part of the shaft tube by screw fitting. An opening that is provided on the outer surface of the crown, with an elastic portion having rubber-like elasticity that changes or erases the handwriting of the cursive body, and is closed at the rear end of the clip mounting portion by mounting the crown. And removing the crown so that the clip can be detachably attached to the clip attachment portion through the opening, and the crown is positioned on the shaft tube side. Te, and the rear end surface closing the opening portion, the head A plurality of concave grooves extending in the longitudinal direction on the outer surface of the side wall of the crown, the rear end of the crown A through hole that communicates with the concave groove and the rear end surface of the head crown is provided in the portion.

Further, a protrusion projecting rearward is provided at the rear portion of the shaft tube, and when the screw fitting between the shaft tube and the crown is finished, a through hole provided in the rear end portion of the crown and the projection Is characterized in that the concave-convex fitting.

Further, the tangent line between the rear end portion of the clip and the elastic portion is 45 degrees or more when the elastic portion is directed downward and the axis of the shaft cylinder is perpendicular to the paper surface.

Furthermore, the writing instrument is arranged such that a plurality of writing bodies are urged and arranged in the axial direction by a coil spring in the axial cylinder, and the clip or the operating body is operated. This is a multi-core retractable writing instrument capable of selectively retracting the writing part, wherein the number of through holes provided in the rear end portion of the crown is the same as the number of the writing objects.

  According to the first configuration of the present invention, a crown is detachably attached to the rear part of the shaft tube, and an elastic part having rubber-like elasticity that discolors or erases the handwriting of the writing body is attached to the crown. By being exposed on the outer surface, the crown can be removed during movement, and the overall length of the writing instrument can be shortened. In addition, the desired crown can be replaced.

  In addition, an opening that is closed when the crown is attached is provided at the rear end of the clip attachment, and the clip is detachably attached to the clip attachment via the opening by removing the crown. Therefore, before attaching the clip and the crown, it is easy to apply decoration such as screen printing or film transfer to the shaft tube, and when moving, the clip can be removed and the outer diameter of the writing instrument can be reduced.

  Still further, the crown includes a rear end surface located on the axial tube side, and a side wall extending from the front end side of the head crown toward the rear end surface side, and on the outer surface of the side wall of the crown, in the longitudinal direction. A plurality of extending grooves are provided at different positions in the circumferential direction, and a through hole or a recess communicating with the recessed groove and the rear end surface of the crown is provided at the rear end of the crown. When a screw or the like is caught in the groove at the rear end of the shaft tube, it is possible to facilitate assembly and attachment / detachment of the clip, and even if the head crown is accidentally swallowed, Since the concave grooves communicate with each other, air can be circulated.

  According to the second configuration of the present invention, a protrusion projecting rearward is provided at the rear end of the shaft tube, and at the end of the screw connection between the shaft tube and the head crown, the rear end portion of the head crown By fitting the through hole or recess provided in the projection and the projection into an uneven shape, it is possible to prevent loosening and / or excessive screw tightening between the crown and the shaft tube.

According to the third configuration of the present invention, when the tangent line between the rear end portion of the clip and the elastic portion faces the elastic portion downward and the axis of the shaft cylinder is perpendicular to the paper surface, it is 45 degrees or more. When the elastic part is used by the user, preferably 50 degrees or more and 90 degrees or less, the user can use it without worrying about the contact between the paper surface and the clip.

  According to a fourth configuration of the present invention, the retractable writing instrument is arranged such that a plurality of writing bodies are urged in the axial tube by a coil spring in the rear end direction of the axial tube, and the clip or the operating body is arranged. By operating, a multi-core retractable writing instrument capable of selectively retracting the writing part of the cursive body, wherein the number of through holes or recesses provided in the rear end of the crown is the same as the cursive body By doing so, it is possible to suppress wearing the wrong head crown at the time of assembly, and when the user uses the elastic portion, it can be used without worrying about the contact between the paper surface and the clip.

  For the elastic part having rubbery elasticity of the present invention, an elastic body having rubbery elasticity such as silicone rubber, olefin-based or polyester-based thermoplastic elastomer can be used as appropriate. In addition, the elastic part may be formed integrally with the crown or attached as a separate member, but it is important that the elastic part can be removed at the same time by removing the crown.

  According to the present invention, in the retractable writing instrument having a clip, it is possible to provide the retractable writing instrument that is easy to use the elastic portion provided at the rear end portion of the shaft tube and is easy to carry when moving.

It is a longitudinal cross-sectional view which shows the retractable writing instrument of embodiment. It is AA sectional drawing in FIG. It is a figure which shows the state which removed the head crown and clip in FIG. It is an enlarged view which shows the crown and elastic part in FIG. It is the external view seen from the arrow F direction which removed the head crown and clip in FIG. It is a perspective external view of a crown. It is the external view seen from the back which shows the state which removed the clip in FIG. It is an external view which shows the state which pressed the elastic part to the paper surface.

  Next, embodiments of the retractable writing instrument of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments.

  1 to 8, the writing instrument 1 according to the first embodiment includes a plurality (three) of a shaft cylinder body in which a male screw portion 2B of the front shaft 2 and a female screw portion 3E of the rear shaft 3 are attached by screwing. The cursive body is accommodated so as to be movable in the front-rear direction. An operation body 6 having the same color as the ink for the writing instrument housed in the ink containing cylinder 10 of the writing body 9 is disposed at the rear part of the writing body 9, and the writing body 9 is urged rearward by a coil spring 17. Yes, the other writing body 13 is provided with an operation body 22 of the same color as the ink for the writing instrument stored in the ink storage tube 14 of the writing body 13 at the rear part of the writing body 13 in the same manner as the writing body 9. is there. Although the details of the other cursive body provided with the operation body 23 are not shown, a multi-core telescoping type equipped with a conventionally known slide type telescoping mechanism provided with three cursive bodies is provided. Writing instrument.

  In the writing body 9 of the embodiment, a writing part 12 composed of a ballpoint pen tip that rotatably holds a φ0.5 mm ball is attached to the tip of an ink containing cylinder 10 via a chip holder 11. The ink container 10 contains a reversible thermochromic microcapsule pigment having an average particle diameter of 5 μm, and the ink viscosity at 1 rpm in an EM type rotational viscometer is 1020 mPa · s (25 ° C.) at 100 rpm. Water-based ink for writing instruments with an ink viscosity of 84 mPa · s (25 ° C) and a shear thinning index of 0.48, and a grease-like ink follower (not shown) at the rear end of this ink It is. The ink viscosity is preferably 40 to 200 mPa · s at 100 rpm and 20 ° C. in an EM type rotational viscometer.

  Three elongated sliding grooves 3A, 3B, 3C extending in the front-rear direction are formed in the rear portion of the rear shaft 3, and are formed at intervals of 120 degrees. The sliding grooves 3A, 3B, and 3C have openings 3AA, 3BA, and 3CA that are open at the rear and communicate with each other at the rear end of the rear shaft 3. The rear end portion of the rear shaft 3 has a substantially cylindrical shape, and film transfer is performed on the outer surface of the rear shaft 3 in advance.

  A substantially cylindrical spring support portion 7 is fixed inside the rear shaft 3. The spring support portion 7 has an inner hole through which three writing bodies such as the writing bodies 9 and 13 are inserted in the axial direction, and a coil spring 17 is provided between the spring supporting portion 7 and each operation body 6. Is arranged, and the writing body 9 and the sliding body 6 are urged rearward. Although not shown in the drawing, the other operating bodies 22 and 23 are also provided with a coil spring between the spring support portion 7 and each operating body in the same manner as the operating body 6 so that the writing body and the sliding body can be used. It is energized backwards.

  A concave mounting portion 3D extending along the longitudinal direction is formed between the rear portion of the rear shaft 3 and the sliding grooves 3B and 3C of the rear shaft 3, and a clip 20 is attached to the mounting portion 3D. It is. The mounting portion 3D has an opening 3DA at the rear end of the rear shaft 3, and the opening 3DA and the mounting portion 3D communicate with each other. A clip base 18 for mounting the clip piece 19 of the clip 20 is inserted into the mounting portion 3D, and the projection provided on the clip base 18 is pushed from the rear side of the rear shaft 3 to the front shaft 2 side, whereby the mounting portion 3D A clip base 18 is detachably attached to the rear shaft 3 by over-fitting with a protrusion provided on the rear shaft 3.

  Further, a male screw portion 3F is provided at the rear portion of the rear shaft 3, and a female screw portion 4A of the crown 4 is detachably attached to the male screw portion 3F by screw fitting. When the head crown 4 is attached to the rear shaft 3, the protrusion 3G provided at the rear end of the rear shaft 3 is engaged with the through hole 4CB provided at the rear end portion of the head crown 4 so that the head crown 4 The looseness of the screw fitting with the rear shaft 3 is suppressed. By removing the crown 4, the rear end of the rear shaft 3 can be exposed, and the writing instrument full length L can be shortened to the writing instrument full length M.

  The crown 4 includes a rear end surface 4D that abuts the rear portion of the rear shaft 3, and an inclined side wall 4C that expands from the distal end of the crown 4 toward the rear end surface. Three concave grooves 4CA extending in the longitudinal direction are provided on the outer surface of the side wall 4C at different positions in the circumferential direction. When the head crown 4 is screwed to the rear shaft 3, the finger is caught in the concave groove 4CA, and the screw It is easy to fit. The concave groove 4CA communicates with a through hole 4CB formed at the rear end of the crown 4. In this way, the wall portion 4C of the crown 4 is inclined so that the diameter decreases toward the tip, and the concave portion 4CA is provided in the wall portion 4C of the crown 4 so that the handwriting can be used when the elastic portion 5 is used. Is preferable because it is easy to visually recognize. In addition, it is preferable to form the through hole 4CB in the rear end portion of the head crown 4 because a decrease in strength and a decrease in the area of the rear end surface 4D are suppressed.

  Furthermore, the crown 4 is provided with an elastic portion 5 having rubber-like elasticity. Specifically, a protrusion 5A of an elastic body (elastic part) 5 made of silicone rubber is dropped into a fitting protrusion 4B provided on the crown 4 so as not to be easily removed by fitting.

  In order to project the writing part 11 made of a ballpoint pen tip of the writing body 8 from the tip opening 2A of the front shaft 2, the operation part 6A of the operation body 6 is moved along the sliding groove 3A to the tip opening of the front shaft 2. By sliding in the 2A direction, the engaging protrusion 6B formed on the operating body 6 is locked to a locking portion (not shown) formed in the rear shaft 3, and the writing portion 11 of the writing body 9 is moved to the front shaft. The tip opening 2A can be selected to maintain the protrusion and can be written. In the present embodiment, the handwriting can be discolored by heat generated by pressing and rubbing the elastic portion 5 against the writing surface T. At this time, the angle α of the tangent S between the rear end portion of the clip piece 19 and the elastic portion 5 was 40 degrees with respect to the axis J of the shaft cylinder.

  Further, by sliding the operation portion 21A of the other sliding body 21 in the direction of the front end opening 2A of the front shaft 2 while the writing portion 11 of the writing body 8 is maintained protruding from the front end opening 2A of the front shaft, The release protrusion of the sliding body 20 releases the locking of the sliding body 6, and the writing portion 11 of the writing body 8 can be immersed in the front shaft 2 by the coil spring 17.

  The clip 20 connects the clip piece 19 to a column 18 provided on the outer wall of the clip base 18 and is a coil spring disposed between the inner wall of the clip piece 19 and the clip table 18 and behind the column 18A. 21, the inner wall at the tip of the clip piece 19 is always elastically repelled on the outer surface of the outer wall of the clip base 18, and the connecting portion is supported by pressing the rear end of the clip piece 19 toward the clip base 18. The inner wall of the tip of the clip piece 19 is arranged so as to be separated from the clip table 18 with respect to the clip table 18.

  From the state in which the crown 4 closes the rear end of the rear shaft 3, the screw fittings 3C and 4A between the rear shaft 3 and the crown 4 are removed, and the rear end of the rear shaft 3 is exposed. The mounting portion 3D has an opening 3DA at the rear end of the rear shaft 3, and the opening 3DA and the mounting portion 3D communicate with each other. Therefore, in this state, the clip 20 can be taken out.

  In this embodiment, for convenience, three ballpoint pens are provided, but examples of the cursive include a ballpoint pen, a marking pen, and a mechanical pencil. The number of cursive letters is not particularly limited, such as one, two or more.

  In addition, the shape of the clip is not particularly limited, but the clip is composed of a clip piece and a clip base, and a locking portion that protrudes toward the clip piece is formed at the tip of the clip base, and the locking portion is By projecting from the surface of the shaft tube, the clamping force between the clip piece and the clip base can be increased, which is preferable. Furthermore, the clip always elastically presses the front end of the clip piece against the outer surface of the clip stand and the clip end clip portion is clipped by a coil spring disposed between the clip piece and the clip stand. Since the tip of the inner wall of the clip piece can be separated from the shaft cylinder with respect to the clip stand by using the connecting part between the clip piece and the clip stand as a fulcrum by pressing to the stand side, the clip piece and the clip stand This is preferable because the clip can be removed and used.

  Furthermore, the number and size of the concave grooves provided on the outer surface of the side wall of the crown are not particularly limited, and a plurality of concave grooves extending in the longitudinal direction may be provided on a part or the whole of the outer surface of the side wall. .

  The ink for the writing instrument is not particularly limited, but the average particle size contains a pigment of 0.1 to 30 μm on a volume basis, and the vertical clearance of the ball is 30 to 80 μm, By setting the ink consumption per 100 m to 200 to 800 mg, a dark and good handwriting and a good writing feeling can be obtained. This is an ink whose ink consumption per 100 m is 200 to 800 mg in a water-based ink for writing instruments having a pigment with an average particle size of 0.1 to 30 μm when the longitudinal clearance of the ball is less than 30 μm. This is because it is difficult to increase the amount of consumption, and when it exceeds 80 μm, the amount of ink consumption is large and the handwriting drying property may be lowered, so that it is most preferably 30 to 80 μm.

  In the present embodiment, for the sake of convenience, a retractable writing instrument that slides and locks the operating body is illustrated, but the writing portion is moved to the front end of the shaft cylinder by a rotating cam mechanism or a rotating operation that slides the clip to operate the rotating cam. There is no particular limitation such as a mechanism that moves in and out from the opening, such as a knock type, a slide type, and a rotary type.

  The multi-core writing instrument of the present invention is not limited to the type of ink, and can be widely implemented as a multi-core writing instrument.

DESCRIPTION OF SYMBOLS 1 Retractable writing instrument 2 Front shaft 2A Front end opening 3 Rear shaft 3A, 3B, 3C Sliding groove 3D Mounting portion 3DA Opening portion 3F Male screw portion 3G Projection 4 Head crown 4A Female screw portion 4B Fitting projection 4C Side wall 4CA Concave groove 4CB Through hole 4D Rear end face 5 Elastic part 6, 22, 23 Slider 6A Operation part 7 Spring support part 9, 13 Writing body 10, 14 Ink storage cylinder 12, 16 Writing part 17 Coil spring 18 Clip stand 19 Clip piece 20 clips

Claims (4)

A writing body is urged and arranged in the axial direction by a coil spring in the axial cylinder, and the clip is mounted on the clip mounting portion provided on the axial cylinder and the clip or the operating body is operated. In the retractable writing instrument capable of retracting the writing part of the cursive body, a crown is removably attached to the rear end of the shaft tube by screw fitting, and the handwriting of the cursive body is attached to the crown. An elastic part having rubber-like elasticity to be discolored or discolored is provided to be exposed on the outer surface, an opening part is closed at the rear end of the clip mounting part by mounting the crown, and the crown is removed, A clip is detachably attached to the clip attachment portion through the opening, and the crown is positioned on the axial tube side to close the opening , and a distal end side of the crown And a side wall extending toward the rear end surface side A plurality of grooves extending in the longitudinal direction are provided on the outer surface of the side wall of the crown at different positions in the circumferential direction, and communicated with the recess and the rear end surface of the crown at the rear end of the crown. A retractable writing instrument characterized by providing a through- hole . A protrusion projecting rearward is provided at the rear portion of the shaft tube, and the through hole and the protrusion provided in the rear end portion of the head crown are uneven when the screw connection between the shaft tube and the crown is finished. The retractable writing instrument according to claim 1, which is fitted. The tangent line between the rear end portion of the clip and the elastic portion is 45 degrees or more when the elastic portion is directed downward and the axis of the shaft cylinder is perpendicular to the paper surface. 2. The haunting type writing instrument described in 2. The retractable writing instrument is arranged by biasing a plurality of writing bodies in the shaft tube by a coil spring in the direction of the rear end of the shaft tube, and by operating the clip or the operating body, the writing unit of the writing body A multi-core retractable writing instrument capable of selectively projecting and retracting, wherein the number of through- holes provided in the rear end of the crown is the same as the number of the cursive body. The intrusive writing instrument according to item 1.

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