JP5908233B2 - Multi-core writing instrument - Google Patents

Description

  The present invention relates to a multi-core writing instrument in which a plurality of writing bodies are accommodated in a shaft cylinder.

  Conventionally, as a slide type multi-core writing instrument, for example, by sliding the raised part of one sliding body in the direction of the front opening of the front shaft, the locking part formed at the rear end part of the sliding body is used as the shaft cylinder. By engaging with the formed stopper, maintaining the state where the writing tip of the writing body protrudes from the tip opening, and by sliding the raised portion of the other sliding body toward the tip opening of the front shaft, the other The release protrusion of the sliding body is in contact with one sliding body, and the locking portion of one sliding body that has been locked to the locking portion is engaged and disengaged, and the one writing tip is immersed from the tip opening, Furthermore, by having the other sliding body move forward, the other locking portion is locked to the locking portion to maintain the protruding state of the writing tip portion of the writing body, and has a retracting mechanism that allows the writing tip portion to be selected and retracted A structure in which multiple writing bodies such as ballpoint pen refills are accommodated in a shaft cylinder Multi-core writing instrument of sliding are well known. In such a multi-core writing instrument, a multi-core writing instrument having a clip is well known in view of being clamped in a pocket or the like.

  Japanese Patent Laid-Open No. 2007-160634 “Multi-core writing instrument” discloses a multi-core writing instrument in which a holder is provided at the rear end of the shaft cylinder, and an elastic part such as an eraser is detachably attached to the holder.

JP 2007-160634 A

  However, since the conventional multi-core writing instrument such as Patent Document 1 described above has a large tangent angle between the elastic portion and the clip with respect to the axial center of the shaft cylinder, the paper surface and the clip are easily brought into contact with each other when the elastic portion is used. There is a problem that it is difficult to use the elastic part because the angle at which the elastic part is used is limited.

  In view of these problems, in order to reduce the angle of the tangent line between the elastic part 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 part. 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 multi-core writing instrument with a simple structure that is easy to use and easy to write in an elastic portion provided at the rear end of a shaft cylinder in a multi-core writing instrument having a clip.

  In order to achieve the above object, according to the present invention, a plurality of writing bodies are 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 attached to the rear end portion of the shaft cylinder. In addition, in the multi-core writing instrument capable of selectively appearing and retracting the writing part of the writing body by operating the operating body, a head crown is detachably attached to the rear part of the shaft tube, An elastic portion having rubber-like elasticity that discolors or erases the handwriting of the cursive body is provided to be exposed on the outer surface.

The angle between 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. It is characterized by that.

  Furthermore, a crown is detachably attached to the rear end portion of the shaft tube by screw fitting, and the elastic portion is in contact with the rear end portion of the shaft tube.

  Furthermore, a mounting groove extending along the longitudinal direction is formed at a rear end portion of the shaft cylinder and at a position different from the sliding groove in the circumferential direction, and a rear side of the mounting groove is formed at the rear end of the shaft cylinder. An opening that communicates is provided, and the clip can be detachably mounted from the opening by removing the crown.

  According to the configuration of claim 1 of the present invention, a crown is detachably attached to the rear portion of the shaft tube, and the elastic portion having rubber-like elasticity that discolors or erases the handwriting of the writing body on the crown. Is exposed on the outer surface, so that the head 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, and the effect of easily decorating the crown, such as colors, graphics, and patterns, by screen printing, film transfer, or the like is achieved.

According to the configuration of claim 2 of the present invention, the paper surface 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. Is 45 degrees or more, and preferably 50 degrees or more, the user can use the elastic portion without worrying about the contact between the paper surface and the clip.

According to the configuration of claim 1 of the present invention, a crown is detachably attached to the rear end portion of the shaft tube by screw fitting, and the elastic portion abuts on the rear end portion of the shaft tube. Thus, there is an effect that it is possible to prevent loosening of the screw between the crown and the shaft cylinder.

  According to the configuration of claim 4 of the present invention, a mounting groove extending along the longitudinal direction is formed at a rear end portion of the shaft cylinder and at a position different from the sliding groove in the circumferential direction, and the rear of the shaft cylinder is formed. At the end, an opening communicating with the rear of the mounting groove is provided, and by removing the crown, the clip can be detachably mounted from the opening, so before mounting the clip and the crown, There is an effect that the shaft tube is easily decorated such as screen printing or film transfer.

  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. Further, the elastic portion may be formed integrally with the head crown or attached as a separate member.

  According to the present invention, in a multi-core writing instrument having a clip, it is possible to provide a multi-core writing instrument that is easy to use and easy to write with an elastic portion provided at the rear end portion of the shaft cylinder with a simple structure.

1 is a longitudinal sectional view showing a multicore writing instrument of Example 1. FIG. 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 in FIG. It is an external view which shows the state which pressed the elastic part to the paper surface.

  Next, examples of the slide type multi-core 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.

Example 1
The multi-core writing instrument 1 according to the first embodiment shown in FIGS. 1 to 6 includes a plurality of (three) in the shaft cylinder body to which the male screw portion 2B of the front shaft 2 and the female screw portion 3E of the rear shaft 3 are attached by screwing. ) Is accommodated so as to be movable in the front-rear direction. A sliding 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 a sliding body 22 of the same color as the ink for the writing instrument stored in the ink storage cylinder 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. The other writing body provided with the sliding body 23 is not shown in detail, but is a slide-type multi-core writing instrument 1 of a conventionally known intrusion mechanism provided with three writing bodies.

  The writing body 9 will be described in detail. A writing portion 12 composed of a ballpoint pen tip that rotatably holds a φ0.5 mm ball is attached to the tip of the ink containing cylinder 10 via a tip 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.

  Further, 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 outer surface of the rear end portion of the rear shaft 3 is substantially cylindrical, and the outer surface of the rear shaft 3 is preliminarily subjected to film transfer.

  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 between the spring supporting portion 7 and each sliding 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 sliding bodies, like the sliding body 6, are provided with a coil spring between the spring support 7 and each sliding body, and the writing body and the sliding body are attached to the rear. It is energized.

  A concave mounting groove 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 groove 3D. It is. The mounting groove 3D has an opening 3DA at the rear end of the rear shaft 3, and the opening 3DA and the mounting groove 3D communicate with each other. The clip base 18 for mounting the clip piece 19 of the clip 20 is inserted into the mounting groove 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. 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. 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. In addition, the outer surface of the crown 4 is decorated by film transfer.

  An elastic portion 5 having rubber-like elasticity is attached to the crown 4. Specifically, the protrusion 5A of the elastic part 5 made of silicone rubber is mounted on the fitting protrusion 4B provided on the head crown 4 so as not to be easily removed by fitting. Further, at the end of screwing of the head crown 4, the distal end portion 5 </ b> B of the elastic portion 5 is in contact with the rear shaft 3.

  In order to cause the writing part 11 made of a ballpoint pen tip of the writing body 8 to protrude from the tip opening 2A of the front shaft 2, the operation part 6A of the sliding 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 sliding 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 addition, 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.

  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 in a state where the writing portion 11 of the writing body 8 is kept protruding from the front end opening 2A of the front shaft, the sliding body The release protrusion 20 releases the sliding body 6 and the coil spring 17 can immerse the writing portion 11 of the writing body 8 into the front shaft 2.

  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 sliding groove 3D has an opening 3DA at the rear end of the rear shaft 3, and the opening 3DA and the sliding groove 3D communicate with each other. Therefore, in this state, the clip 20 can be taken out. . Further, since the sliding grooves 3A, 3B, and 3C have openings 3AA, 3BA, and 3CA at the rear end of the rear shaft 3, the sliding body 6 is mounted from the rear of the rear shaft 3 before the head crown 4 is mounted. , 22 and 23 can be visually recognized, and an erroneous sliding body can be prevented from being disposed.

  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. Moreover, the number of cursive letters should just be two or more, and specifically, 2, 3, 4, 5, 6, etc. are mentioned.

  Also, the ink for writing instruments is not particularly limited, but the ink contains a pigment having an average particle size of 0.1 to 30 μm, and the ball has a longitudinal clearance of 30 to 80 μm per 100 m. When the consumption is 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 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.

  In the present embodiment, for the sake of convenience, a slide type multi-core writing instrument is illustrated, but a mechanism that causes the writing unit to appear and disappear from the front end opening of the shaft cylinder by a rotating operation, a knock type, a slide type, a rotary type, etc. are particularly limited. It is not something.

  In this embodiment, for convenience, the rear end of the shaft tube can be freely opened and closed by screw-fitting the crown, but the method of attaching the crown is to form a hinge on the rear end of the shaft tube, Although it is not particularly limited, such as disposing the crown so as to be rotatable with respect to the shaft cylinder, it is preferable that the head crown is screwed to the rear end portion of the shaft cylinder to improve the assemblability.

  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 Multi-core writing instrument 2 Front shaft 2A Front opening 3 Rear shaft 3A, 3B, 3C Sliding groove 3D Mounting groove 3DA Opening 3F Male screw part 4 Head crown 4A Female screw part 5 Elastic part 6, 22, 23 Sliding body 6A Operation part 7 Spring support part 9, 13 Cursive body 10, 14 Ink storage cylinder 12, 16 Writing part 17 Coil spring 18 Clip base 19 Clip piece 20 Clip

Claims (3)

A plurality of writing bodies arranged in a shaft cylinder by being biased by a coil spring in the direction of the rear end of the shaft cylinder, a clip attached to the rear end portion of the shaft cylinder, and a writing section of the writing body are selectively projected and retracted An elastic part having a rubber-like elasticity that discolors or erases the handwriting of the writing body on a crown that is detachably attached to the rear part of the shaft tube by screw fitting. Is provided to be exposed on the outer surface, and the elastic portion is in contact with a rear end portion of the shaft tube . The angle between 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. The multi-core writing instrument according to claim 1, wherein 3. The multi-core writing instrument according to claim 1 , wherein the clip is detachably mounted in a mounting groove formed in a rear end portion of the shaft tube and extending along a longitudinal direction .

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