JP2012000911A - Writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure facilitating a cover to be detached for a shaft tube, and hardly causing reduction of fitting force over time.SOLUTION: A writing instrument includes the cover for exposing and closing a back end of the shaft tube, at a back end of the shaft tube, a base projected from an outer surface of the shaft tube is formed at a side at the back part of the shaft tube, an engaging part provided at one end of the cover is engaged with an engaged part formed at the base, the cover is turnably engaged, and a projection of a fitting part of the lid body is surmounted on and fitted to a projection part formed at a back end of the shaft body in a detachable manner, and a second cover is mounted with at least a part of the cover covered, characteristically.

Description

  The present invention relates to a writing instrument comprising a lid that exposes and closes the rear end of the shaft tube at the rear end of the shaft tube.

  In a writing instrument comprising a lid that exposes and closes the rear end of the shaft cylinder at the rear end of the shaft cylinder, in Japanese Patent Application Laid-Open No. 2007-38635 “Multi-core writing instrument”, An opening is provided to open the moving groove to the rear, and from the opening, the sliding body can be removed from the shaft tube and inserted into the shaft tube, and a lid is attached to the hinge provided on the shaft tube. A configuration that is movably mounted is disclosed.

JP 2007-38635 A

  By the way, various methods are conceivable as a method of fitting the lid so as to be freely opened and closed. However, in consideration of convenience and the like, it is most preferable to adopt a simple fitting method by overpass fitting.

  However, overpass fitting may cause the fitting force to decrease due to wear and dimensional changes of the fitting part due to repeated opening and closing, so it is necessary to set the initial fitting force high, and as a result, the lid is opened and closed There was a problem that it was difficult to do.

  An object of the present invention is to provide a structure in which a lid body can be easily attached to and detached from a shaft cylinder, and the fitting force does not easily decrease over time.

  In order to achieve the above object, the present invention provides a writing instrument comprising a lid that exposes and closes the rear end of the shaft tube at the rear end of the shaft tube, and is provided on a side surface of the rear portion of the shaft tube. Forming a base projecting from the outer surface of the shaft cylinder, engaging an engaging portion provided at one end of the lid with an engaged portion formed on the base, and rotatably engaging the lid. And the projection of the fitting portion of the lid body is detachably mounted on the projection of the fitting portion formed at the rear end portion of the shaft tube, and at least one of the lid body. The second cover is attached so as to cover the part.

  Further, the second lid body is located on an extension line in a radial direction of the fitting portion of the lid body.

  According to the configuration of claim 1 of the present invention, a writing instrument in which a lid is rotatably engaged with a rear end portion of the shaft cylinder, and a protrusion of a fitting portion provided on the lid is provided. Covering at least a part of the lid, the lid body can be easily opened and closed by detachably getting over and fitting with the projection of the fitting portion formed at the rear end of the shaft cylinder, Since the second lid is mounted, even if the lid is repeatedly opened and closed, the second lid that is not directly related to the over-fitting between the fitting portion and the fitted portion by opening and closing is used to A dimensional change hardly occurs and a stable fitting force can be obtained.

  According to the configuration of claim 2 of the present invention, the second lid body is located on the extension line in the radial direction of the overfitting between the lid body and the shaft tube, thereby suppressing the outward spreading of the lid body. It is preferable because a decrease in fitting force can be efficiently suppressed. The said 2nd cover body should just be located in any one part on the arbitrary extension lines in the radial direction of the fitting part of the said cover body.

  For the lid of the present invention, synthetic resin materials such as PP resin, POM resin, PC resin, ABS resin, soft materials such as thermoplastic elastomer and silicone rubber, and the like can be used. In particular, in view of crossover fitting, it is most preferable to use a relatively low hardness resin material such as POM resin or PP resin. The second lid is most preferably made of a hard material that is harder than the lid, such as ABS resin, PC resin, metal, etc., in order to suppress a decrease in the fitting force of the lid.

  The present invention can provide a structure in which the lid can be easily attached to and detached from the shaft cylinder and the fitting force does not easily decrease over time.

1 is an external view showing a writing instrument of Example 1. FIG. It is a figure which shows the state which protruded the pen-tip part in FIG. It is a figure which shows the state which opened the cover body in FIG. It is a figure which shows the state which removed the writing body and sliding body in FIG. It is a figure which shows the state which removed the writing body and sliding body in FIG. It is a longitudinal cross-sectional view in FIG. FIG. 7 is an enlarged vertical cross-sectional view of a main part of FIG. It is a figure which shows the cursive body in FIG. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. It is a figure which shows the assembly process of a cover body, a 2nd cover body, and a pressing pin.

  Next, embodiments of the 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 writing instrument 1 according to the first embodiment shown in FIGS. 1 to 11 includes a plurality of (four) writing bodies in the front and rear in a shaft cylinder main body in which the front shaft 2 and the rear shaft 3 are screwed together via a connector 4. It is housed so that it can move in the direction. A sliding body 9 having the same color as the ink for the writing instrument housed in the ink containing cylinder 15 of the writing body 14 is disposed at the rear part of the writing body 14, and the writing body 14 is urged rearward by the coil spring 12. Although the details of the other writing bodies are not shown in the drawing, the slide-type multi-core writing instrument of a conventionally known intrusion mechanism in which three writing bodies are arranged in the same manner as the writing body 14 is provided.

  The cursive body 14 is a ballpoint pen refill, and a pen tip portion 16 in which a ball is rotatably held is attached to the tip portion of the ink containing cylinder 15, and black shear thinning viscosity is provided inside the ink containing cylinder 15. The water-based gel ink and the ink follower are directly accommodated. Although not shown in the drawing, the other three writing bodies, like the writing body 14, are mounted with a pen tip portion made of a ballpoint pen tip at the tip of the ink containing cylinder, and are different in water-based gel ink from the writing body 14. And a ballpoint pen refill that directly accommodates the ink follower.

  Four elongated sliding grooves 3b, 3c, 3d, and 3e extending in the front-rear direction are formed in the rear portion of the rear shaft 3, and are formed at intervals of 90 degrees. The sliding grooves 3b, 3c, 3d, and 3e are open at the rear, and communicate with each other at the rear end 3a of the rear shaft 3.

  A substantially cylindrical spring support portion 8 is fixed in the rear shaft 3. The spring support portion 8 has an inner hole through which four writing bodies such as the writing body 14 are inserted in the axial direction, and a coil spring 12 between the spring support portion 8 and each of the sliding bodies 9 and 10. 13 are arranged, and the writing body and the sliding body are urged backward. Although not shown, the other two sliding bodies are also provided with a coil spring between the spring support portion 8 and each sliding body in the same manner as the sliding bodies 9 and 10, and the writing body and the sliding body. Is biased backwards.

  A base portion 3h protruding outward is formed on the rear portion of the rear shaft 3 and the side surface between the sliding grooves 3b and 3e of the rear shaft 3, and the engaged portion 3i formed on the base portion 3h The lid 5 is provided at one end of a lid body 5 made of polypropylene, and engages with an engagement portion 5c extending left and right when the clip 11 is viewed from the front, and the lid body 5 is pivotally engaged. By rotating the body 5, the rear end 3a of the rear shaft 3 can be exposed.

  A metal clip 11 is attached to the base 3h. Specifically, the rear end portion 11 a of the clip 11 is formed in a substantially U shape, and the sawtooth mounting portion 11 b formed on the rear end portion 11 a of the clip 11 is formed on the base 3 h protruding from the rear shaft 3. It is installed in the groove.

  The lid 5 is formed with a fitting portion 5a. When the lid 5 closes the rear end 3a of the rear shaft 3, the cover 5 is formed at the rear end of the rear shaft 3 and protrudes rearward. The protrusion 5g of the fitting portion 5a is fitted over the protrusion 3g of the fitting portion 3f, and the lid 5 is fitted to the rear shaft 3 so as to be freely opened and closed.

  In addition, a second lid body 6 made of a polycardnade, which is harder than the lid body and difficult to deform, is secured to the locking portion 5d of the shaft portion provided on the lid body 5 extending rearward so as to cover the lid body 5. The locked portion 6b inside is locked. In addition, the second lid 6 is a part of the lid 5, specifically, over the projection 5 b of the fitting portion 5 a of the lid 5 and the projection 3 g of the fitted portion 3 f of the rear shaft 3. On the extended line in the radial direction of the fitting, specifically, a part on the symmetrical side with respect to the axis of the engaging portion 5c is covered.

  In order to facilitate the opening / closing operation from the rear shaft 3 of the lid body 5, the second lid body 6 has an end portion on the symmetrical side with respect to the axis line of the engaging portion 5 c engaged with the base portion 3 h, outwardly. A handle portion 6a protruding toward the bottom is integrally formed. Further, in order to prevent the second lid body 6 from being detached from the lid body 5 and to suppress the inward bending of the lid body and the second lid body, the pressing pin 7 is fitted into the second lid body, and the lid body 5 is installed.

  In order to project the pen tip portion 16 made of a ballpoint pen tip of the writing body 14 from the tip opening portion 2a of the front shaft 2, the operation portion 9a of the sliding body 9 is opened along the sliding groove 3b. By sliding in the direction of the portion 2a, the engaging projection 9b formed on the sliding body 9 is locked to a locking portion (not shown) formed in the rear shaft 3, and the pen tip portion 16 of the writing body 14 is moved. The protrusion can be maintained by selecting from the front end opening 2a of the front shaft. The sliding body 9 is provided with a release protrusion 9c.

  By sliding the operation portion 10a of the other sliding body 10 in the direction of the front end opening 2a of the front shaft 2 while the pen tip portion 16 of the writing body 14 is maintained protruding from the front end opening 2a of the front shaft, The release protrusion of the moving body 10 releases the locking of the sliding body 9 via the sleeve 17, and the pen tip portion 16 of the writing body 14 can be immersed in the front shaft 2.

  To replace the writing body 14, from the state where the lid 5 closes the rear end 3a of the rear shaft 3, the operating portion 6a of the second lid 6 is pressed backward (in the direction of arrow F in FIG. 1) and fitted. The projection 5b of the mating portion 5a and the projection 5g of the fitted portion 3f are disengaged, the lid 5 is rotated backward (in the direction of arrow G in FIG. 3), and the rear end 3a of the rear shaft 3 To expose.

  When the lid 5 is rotated and the rear end 3a of the rear shaft 3 is exposed, the sliding bodies 9, 10 (others not shown) are moved from the sliding grooves 3b, 3c, 3d, 3e to the coil springs 12, 13 respectively. It protrudes to the rear exterior by the rear biasing (others are not shown). By taking out the sliding body 9 from this state, the writing body 14 connected to the sliding body 9 is taken out from the rear shaft 3, and then a new writing body (not shown) and a new writing body are connected to each other. The sliding body is inserted into the rear shaft 3 through the sliding groove 3b whose rear end is open. Then, the lid body 5 is rotated forward, and then the projection 5b of the fitting portion 5a and the projection 5g of the fitted portion 3f are fitted, and the rear end 3a of the rear shaft 3 is closed. As a result, the replacement work of the writing body and the sliding body is completed, so that the user can replace the writing body and the sliding body corresponding to the user's preference in the shaft cylinder, and the writing body and the sliding body can be quickly and reliably stored. Can be replaced.

  In this embodiment, for convenience, the lid is rotated and the rear end of the rear shaft is exposed, and the writing body and the sliding body can be replaced. However, the lid is rotated and the rear end of the rear shaft is exposed. Then, it may be filled with a lead core, etc., and the writing body can be replaced or the lead core can be filled without losing the lid.

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

DESCRIPTION OF SYMBOLS 1 Writing instrument 2 Front shaft 2a Front opening 3 Rear shaft 3a Rear end 3b, 3c, 3d, 3e Sliding groove 3f Fitting part 3g Protruding part 3h Base part 3i Engagement part 4 Connecting tool 5 Lid 5a Fitting part 5b Protruding part 5c Engaging part 5d Locking part 6 Second lid 6a Handle part 6b Locked part 7 Holding pin 8 Spring support part 9, 10 Sliding body 9a, 10a Operation part 11 Clip 11a Rear end part 12, 13 Coil spring 14 Cursive body 15 Ink container 16 Pen tip 17 Sleeve

Claims (2)

A writing instrument comprising a lid that exposes and closes the rear end of the shaft tube at the rear end of the shaft tube, and a base projecting from the outer surface of the shaft tube is formed on a side surface of the rear portion of the shaft tube. The engagement portion provided at one end of the lid body is engaged with the engaged portion formed on the base portion, the lid body is rotatably engaged, and the engagement portion of the lid body The projecting part is detachably mounted on the projecting part of the fitted part formed at the rear end part of the shaft tube, and the second cover body is mounted so as to cover at least a part of the lid body. Writing instrument characterized by being. The writing instrument according to claim 1, wherein the second lid body is located on a radial extension line of the fitting portion of the lid body.

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