JP2010253866A - Shake-out type mechanical pencil with cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shake-out type mechanical pencil with a cap, capable of propelling a lead 11 by an inertia force of a heavy body 13 generated by shaking, and capable of preventing the lead from being propelled unnecessarily, by covering the cap 15 onto a writing tip part when carried. <P>SOLUTION: An engagement part of the cap 15 is constituted to be engageable with an engagement part of a rear shaft 8. The cap 15 is attached detachably to a rear part of the rear shaft 8, at the time of writing, and a front shaft 7 is separated from an abutting part of the rear shaft 8 with a proper space. The engagement part of the cap 15 is engaged disengageably with the engagement part of the rear shaft 8, to cover the writing tip part when carried, and an elastic piece 8E formed in a front part of the rear shaft 8 is deflected inwards to fix the heavy body 13 by the elastic piece 8E. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a swing-out mechanical pencil with a cap that protects a writing tip portion with a cap when being carried and prevents core feeding when being carried.

  Conventionally, when transporting a mechanical pencil from a production factory to a store, a swing-out system with a cap detachably fitted to the base to prevent unnecessary centering out due to vibration generated during transportation. The mechanical pencil is known. (See Patent Document 1)

  However, when the weight body slides due to vibrations that occur during transportation and the chuck is advanced by the inertial force of the weight body to feed out the lead, the lead often comes into contact with the cap. If the chuck is moved forward repeatedly without being able to advance, there is a problem that the powder of the core adheres to the core holding portion of the chuck and the durability of the chuck is impaired.

  Further, when a cap is attached to the base in order to protect the base when being carried, the eraser is exposed and the appearance is impaired, so that it is not suitable for preventing the lead-out during the carrying.

Utility Model Registration No. 2561567

  The problems to be solved are that the appearance when carried is impaired and the core is extended when vibration occurs when carried.

  The present invention is provided with a chuck, a spring for biasing the chuck rearward, a fastener externally fitted to the chuck, a core tank interlocked with the chuck, and located outside the core tank and slidable in the longitudinal direction. In a swing-out mechanical pencil that pulls out the lead by advancing the chuck by the inertial force of the weight body, the engaging portion of the cap and the engaging portion of the rear shaft are configured to be engageable. Sometimes the cap is detachably attached to the rear part of the rear shaft, and the abutment part of the front shaft and the rear shaft is appropriately separated, and when carrying the cap, the engagement part of the rear shaft covers the writing tip part. The first feature is that the joint portion is detachably engaged, and an elastic piece formed at the front portion of the rear shaft is bent inward to fix the weight body by the elastic piece.

  In addition, an engagement protrusion protruding in the outer peripheral direction is formed at the front end of the elastic piece formed at the front portion of the rear shaft, an opening window is formed on the front shaft, and the engagement protrusion of the rear shaft is formed as the opening window of the front shaft. The second feature is that the rear shaft is connected to the front shaft so as to be slidable in the longitudinal direction by being engaged.

  Furthermore, the engaging protrusion formed on the elastic piece of the rear shaft was engaged with the opening window of the front shaft, and the engaging portion formed on the inner surface of the cap was engaged with the engaging protrusion protruding from the outer periphery of the front shaft. This is the third feature.

  Furthermore, a fourth feature is that a return spring is attached between the front shaft and the rear shaft, and the rear shaft is urged rearward in the longitudinal direction.

  The swing-out mechanical pencil with the cap of the present invention protects the writing tip by covering the writing tip with the cap when carrying, and damages the clothing pocket at the writing tip when carrying in the pocket of clothing. There is no danger of it. Further, since unnecessary lead feeding caused by the inertial force of the weight body is prevented at the time of carrying, there is no possibility of soiling clothes with the protruding lead. Furthermore, the overall length is shortened when carrying, and it is easy to carry, and the advantage of improving the appearance can be obtained by covering the writing tip with a cap.

FIG. 1 is a longitudinal sectional view showing a portable state in a swing-out mechanical pencil with a cap according to a first embodiment of the present invention. (Example 1) FIG. 2 is a cross-sectional view taken along line AA of FIG. (Example 1) FIG. 3 is a cross-sectional view taken along line BB in FIG. (Example 1) FIG. 4 is a longitudinal sectional view showing a writing state in the swing-out mechanical pencil with the cap according to the first embodiment of the present invention. (Example 1) FIG. 5 is a longitudinal sectional view showing a portable state in a swing-out mechanical pencil with a cap according to a second embodiment of the present invention. (Example 2) FIG. 6 is a longitudinal sectional view showing a writing state in a swing-out mechanical pencil with a cap according to a second embodiment of the present invention. (Example 2) FIG. 7: is a longitudinal cross-sectional view which shows the portable state in the swing type mechanical pencil with a cap of Example 3 of this invention. (Example 3) FIG. 8: is a longitudinal cross-sectional view which shows the writing state in the swing-out type mechanical pencil with a cap of Example 3 of this invention. (Example 3) FIG. 9: is a longitudinal cross-sectional view which shows the portable state in the swing type mechanical pencil with a cap of Example 4 of this invention. Example 4 10 is a cross-sectional view taken along line AA of FIG. Example 4 FIG. 11: is a longitudinal cross-sectional view which shows the writing state in the swing-out type mechanical pencil with a cap of Example 4 of this invention. Example 4 FIG. 12: is a longitudinal cross-sectional view which shows the portable state in the swing-out mechanical pencil with the cap of Example 5 of this invention. (Example 5) FIG. 13: is a longitudinal cross-sectional view which shows the writing state in the swing-out type mechanical pencil with a cap of Example 5 of this invention. (Example 5) FIG. 14 is a longitudinal sectional view showing a portable state in a swing-out mechanical pencil with a cap according to a sixth embodiment of the present invention. (Example 6) FIG. 15: is a longitudinal cross-sectional view which shows the writing state in the swing type mechanical pencil with a cap of Example 6 of this invention. (Example 6)

  A swing-out mechanical pencil with a cap that improves the appearance when carried and prevents unnecessary lead-out is realized by providing a cap that protects the writing tip.

  Hereinafter, based on FIG.1, FIG.2, FIG.3 and FIG. 4, the oscillating mechanical pencil with a cap of Example 1 in this invention is demonstrated. Moreover, let the left side of FIG. 1 be the front, and let the right side be back. First, a synthetic resin connector 2 is press-fitted and fixed to the rear part of a metal chuck 1 made of brass or the like. A core tank 3 made of a resin pipe is press-fitted and fixed to the rear portion of the connector 2. Further, a fastener 4 is fitted on the head 1 </ b> A of the chuck 1, and a connector 5 that receives the fastener 4 is further provided. A spring 6 having a relatively weak force is stretched between the connector 5 and the connector 2 to form a mechanism.

  Further, an opening window 7A extending in the longitudinal direction is formed in the middle portion of the front shaft 7 at a relative position, and a key groove 7B is formed extending rearward from the opening window 7A. Further, a step portion 7 </ b> C is formed in the middle portion of the front shaft 7. Further, a protrusion 8A is formed in the middle portion of the rear shaft 8, and a step portion 8B is formed in front of the protrusion 8A. A cylindrical portion 8C is formed in front of the step portion 8B of the rear shaft 8, and a key 8D extending in the longitudinal direction is formed in the cylindrical portion 8C at a relative position. An elastic piece 8E is formed extending forward from the key 8D, and an engaging protrusion 8F protruding outward is formed at each front end of the elastic piece 8E. In addition, an inner protrusion 8G that protrudes inward is formed at an appropriate rear position from the engagement protrusion 8F of the elastic piece 8E. The cylindrical portion 8C of the rear shaft 8 is inserted from the rear of the front shaft 7 and is moved forward while the elastic protrusion 8E is bent inward by aligning the engagement protrusion 8F of the elastic piece 8E with the key groove 7B of the front shaft 7. Let Then, the engaging protrusion 8F is engaged with the opening window 7A of the front shaft 7, and the rear shaft 8 is connected to the front shaft 7 so as to be slidable in the longitudinal direction as appropriate. The engaging projection 8F is projected outward from the opening window 7A of the front shaft 7. Further, a rubber grip 9 is fitted on the front portion of the front shaft 7.

  The core tank 3 of the mechanism portion is inserted from the front of the front shaft 7 to which the rear shaft 8 is connected, and the front member 10 is detachably screwed into the front portion of the front shaft 7 so that the inner stage of the front member 10 can be removed. 10 A and the front end of the front shaft 7 hold the connector 5 to attach the mechanism portion. Further, the tip member 10 incorporates a rubber core holder 12 for holding the core 11 lightly. A plurality of cores 11 are housed in the core tank 3 and a weight body 13 is loosely fitted on the outside of the core tank 3 so as to be slidable in the longitudinal direction. Further, the tail plug 14 is detachably screwed to the rear portion of the rear shaft 8 and attached.

  In addition, a groove 15A is formed in the synthetic resin cap 15, and an eraser 16 is provided on the top, and a knob 17 covering the eraser 16 is detachably attached. In the portable state shown in FIG. 1, after the cap 15 is put on the front shaft 7, the cap 15 is pressed against the groove 15A of the cap 15 by pressing the cap 15 and the rear shaft 8 together. The mating protrusion 8F is detachably engaged, and the cap 15 is attached. Further, the elastic piece 8E is bent inward, and the inner protrusion 8G is pressed against the weight body 13 to fix the weight body 13. At this time, the rear end of the cap 15 is brought into contact with the stepped portion 7C of the front shaft 7, and the rear portion of the lead tank 3 is brought into contact with the bottom of the tail plug 14, so that the spring 6 is compressed and the chuck 1 is expanded. In this portable state, the core 11 is not held by the chuck 1. In this state, the front end of the engaging projection 8F is brought into contact with the front end of the opening window 7A of the front shaft 7, and the step portion 8B of the rear shaft 8 is brought into contact with the rear end of the front shaft 7.

  Therefore, in this portable state, even if vibration occurs, the weight body 13 is fixed and cannot move, and the chuck 1 is expanded to release the lead 11, so that unnecessary lead feeding is not performed. .

  Next, when writing, the writing state shown in FIG. 4 is obtained by removing the cap 15 and attaching the cap 15 to the rear shaft 8. In this state, the chuck 1 is biased rearward by the spring 6 and the chuck 1 is closed to hold the core 11. Further, the rear end of the front shaft 7 and the step portion 8B of the rear shaft 8 are appropriately separated from each other, and the elastic piece 8E of the rear shaft 8 is expanded outward and the inner protrusion 8G is separated from the weight body 13, so that the weight body 13 is It is loosely fitted between the outer casing 2A of the connector 2 and the inner stage 14A of the tail plug 14 so as to be slidable in the longitudinal direction.

  When writing is performed in this state and the lead 11 is consumed, the lead 11 is drawn out by the inertial force of the weight body 13 by gripping the grip 9 and swinging it forward. When one lead 11 is consumed and the next lead 11 is made to follow, the knob 17 provided on the cap 15 is pressed to advance the chuck 1 to make the lead 11 follow. Further, when the eraser 16 is used, it is used with the knob 17 removed. At this time, the cap 15 is held by hand and the eraser 16 is pressed against the paper surface. You can erase the handwriting. When the lead 11 is refilled in the lead tank 3, in the state shown in FIG. 4, the cap 15 is first removed, then the tail plug 14 is removed from the rear shaft 8, and the spare lead 11 is refilled.

  In the case of the swing-out mechanical pencil with the cap according to the first embodiment, even if vibration occurs when being carried, unnecessary lead-out can be prevented and the weight 13 is fixed and does not move. Can be carried without touching. Further, since the tail plug 14 is screwed to the rear shaft 8, there is no possibility that the tail plug 14 will come off even if the weight body 13 abuts on the tail plug 14.

  Hereinafter, based on FIG.5 and FIG.6, the swing-out type mechanical pencil with a cap of Example 2 in this invention is demonstrated. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, an opening window 107A extending in the longitudinal direction is formed at a relative position in an intermediate portion of the front shaft 107, and a keyway 107B is formed extending rearward from the opening window 107A. Further, a ridge 107D is formed at an intermediate portion of the front shaft 107, and a step 107C is formed behind the ridge 107D. Further, a protrusion 108A is formed in the middle part of the rear shaft 108, and a step part 108B is formed in front of the protrusion 108A. A cylinder part 108C is formed in front of the step part 108B of the rear shaft 108, and a key 108D extending in the longitudinal direction is formed in the cylinder part 108C at a relative position. An elastic piece 108E is formed extending forward from the key 108D, and an engaging protrusion 108F protruding outward is formed at each front end of the elastic piece 108E. In addition, an inner protrusion 108G is formed that protrudes inward from the engagement protrusion 108F of the elastic piece 108E as appropriate. Furthermore, an engaging protrusion 108H is formed behind the step portion 108B of the rear shaft 108.

  Further, the cap 115 is formed with a groove 115A and an engaging groove 115B on the rear end side. Further, an eraser 16 is provided on the top of the cap 115, and a knob 17 covering the eraser 16 is detachably attached.

  In the portable state shown in FIG. 5, after the cap 115 is put on the front shaft 107, the cap 115 and the rear shaft 108 are pressed against each other so that the groove 115A of the cap 115 is engaged with the rear shaft 108. The engaging recess 115B of the cap 115 is detachably engaged with the mating protrusion 108H, and the protrusion 115D of the front shaft 107 is detachably engaged with the cap 115. Further, the elastic piece 108E bends inward, and the inner protrusion 108G comes into pressure contact with the weight body 13 to fix the weight body 13. At this time, the rear end of the cap 115 is brought into contact with the step portion 107C of the front shaft 107, and the rear portion of the lead tank 3 is brought into contact with the bottom portion of the tail plug 14, so that the spring 6 is compressed and the chuck 1 is expanded. In this portable state, the core 11 is not held by the chuck 1. In this state, the front end of the engagement protrusion 108F is brought into contact with the front end of the opening window 107A of the front shaft 107, and the step portion 108B of the rear shaft 108 is brought into contact with the rear end of the front shaft 107.

  Therefore, in this portable state, even if vibration occurs, the weight body 13 is fixed and cannot move, and the chuck 1 is expanded and the core 11 is released, so that unnecessary core feeding is not performed.

  Next, when writing, the cap 115 is removed from the front shaft 107, and the engagement recess 115B of the cap 115 is detachably engaged with the engagement protrusion 108H of the rear shaft 108 as shown in FIG. Written state. In this state, the chuck 1 is biased rearward by the spring 6 and the chuck 1 is closed to hold the core 11. Further, the rear end of the front shaft 107 and the step portion 108B of the rear shaft 108 are separated from each other as appropriate, and the elastic piece 108E of the rear shaft 108 is expanded outward and the inner protrusion 108G is separated from the weight body 13. Is loosely fitted between the outer casing 2A of the connector 2 and the inner stage 14A of the tail plug 14 so as to be slidable in the longitudinal direction.

  When writing is performed in this state and the lead 11 is consumed, the lead 11 is fed out as in the first embodiment.

  In the case of the swing-out mechanical pencil with the cap according to the second embodiment, even if vibration occurs when being carried, unnecessary core feeding can be prevented and the weight body 13 is fixed and does not move. There is an advantage that it can be carried without touching. Further, since the tail plug 14 is screwed to the rear shaft 108, there is no possibility that the tail plug 14 will come off even if the weight body 13 abuts on the tail plug 14. Further, when carrying, the engaging groove 115B of the cap 115 is engaged with the protrusion 107D of the front shaft 107, and when writing, the engaging groove 115B of the cap 115 is engaged with the engaging protrusion 108H of the rear shaft 108. Therefore, the cap 115 can be securely attached when carrying or writing.

  Hereinafter, based on FIG.7 and FIG.8, the swing-out type mechanical pencil with a cap of Example 3 in this invention is demonstrated. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, an elastic piece 208E extending forward from the step portion 208B of the rear shaft 208 is formed at a relative position, and an engaging protrusion 208F protruding outward is formed at each front end of the elastic piece 208E. Further, an inner protrusion 208G that protrudes inward from the engagement protrusion 208F of the elastic piece 208E as appropriate is formed at an appropriate rear position. An outer flange 208I is formed at an intermediate portion of the rear shaft 208, a front engagement groove 208J is formed in front of the outer flange 208I, and a rear engagement groove 208K is formed behind the outer flange 208I. Further, the tail plug 14 is detachably screwed and attached to the rear portion of the rear shaft 208. The elastic piece 208E of the rear shaft 208 is inserted from the rear of the front shaft 207, and the elastic piece 208E is moved forward while being bent inward. Then, the engagement protrusion 208F is engaged with the opening window 207A of the front shaft 207, and the rear shaft 208 is slidably connected to the front shaft 207 in the longitudinal direction as appropriate. Further, the engagement protrusion 208F is protruded outward from the opening window 207A of the front shaft 207.

  Further, in the portable state shown in FIG. 7, after the cap 215 is put on the front shaft 207, the cap 215 and the rear shaft 208 are pressed against each other, so that the inner protrusion 215 </ b> C formed at the rear portion of the cap 215 is applied. The front engaging groove 208J of the rear shaft 208 is detachably engaged, and the cap 215 is attached. Further, the engaging protrusion 208F of the elastic piece 208E is pressed against the inner surface of the cap 215 and bent inward, and the inner protrusion 208G is pressed against the weight body 13 to fix the weight body 13. At this time, the outer stage of the tip member 10 is brought into contact with the inner stage 215D of the cap 215, the rear part of the lead tank 3 is brought into contact with the bottom part of the tail plug 14, the spring 6 is compressed, and the chuck 1 is expanded. In this portable state, the core 11 is not held by the chuck 1. Further, the front end of the engagement protrusion 208F is brought into contact with the front end of the opening window 207A of the front shaft 207, and the step portion 208B of the rear shaft 208 is brought into contact with the rear end of the front shaft 207.

  Therefore, in this portable state, even if vibration occurs, the weight body 13 is fixed and cannot move, and the chuck 1 is expanded and the core 11 is released, so that unnecessary core feeding is not performed.

  Next, when writing, remove the cap 215 from the front shaft 207 and removably engage the inner protrusion 215C of the cap 215 with the rear engagement recess 208K of the rear shaft 208. The writing state shown in FIG. In this state, the chuck 1 is biased rearward by the spring 6 and the chuck 1 is closed to hold the core 11. Further, the rear end of the front shaft 207 and the step portion 208B of the rear shaft 208 are appropriately separated, and the weight body 13 is slidable in the longitudinal direction between the outer casing 2A of the connector 2 and the inner step 14A of the tail plug 14. It is loosely fitted.

  When writing is performed in this state and the lead 11 is consumed, the lead 11 is drawn out by the inertial force of the weight body 13 by gripping the grip 9 and swinging it forward. Further, when one lead 11 is consumed and the next lead 11 is caused to follow, the knob 17 provided on the cap 215 is pressed to advance the chuck 1 so that the lead 11 is caused to follow. Further, when the eraser 16 is used, the knob 17 is removed, but at this time, the cap 215 is held by hand and the eraser 16 is pressed against the paper surface. You can erase the handwriting. Further, when the lead 11 is replenished to the lead tank 3, in the state shown in FIG. 8, the cap 215 is first removed, then the tail plug 14 is removed from the rear shaft 208, and the spare lead 11 is refilled.

  In the case of the swing-out mechanical pencil with the cap according to the third embodiment, the inner protrusion 215C of the cap 215 is engaged with the front engagement recess 208J of the rear shaft 208, and the cap 215 is attached. By pressing the engagement protrusion 208F formed on the elastic piece 208E, the elastic piece 208E is bent and the weight body 13 is fixed by the inner protrusion 208G formed on the elastic piece 208E. The body 13 is fixed separately and can be set under optimum conditions. The cap 215 can be engaged and the weight body 13 can be securely fixed.

  Hereinafter, based on FIG.9, FIG10 and FIG.11, the swing-out mechanical pencil with the cap of Example 4 in this invention is demonstrated. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, an opening window 307A extending in the longitudinal direction is formed at a relative position in an intermediate portion of the front shaft 307. The opening window 307A is formed such that the bottom is wide and the outside is narrow. Further, a key groove 307B is formed extending rearward from the opening window 307A. Further, a stepped portion 307 </ b> C is formed in the middle portion of the front shaft 307. Further, a step portion 308B is formed at an intermediate portion of the rear shaft 308, and a cylindrical portion 308C is formed in front of the step portion 308B of the rear shaft 308. A key 308D extending in the longitudinal direction is formed in the cylindrical portion 308C at a relative position. An elastic piece 308E is formed extending forward from the key 308D, and an engaging protrusion 308F protruding outward is formed at each front end of the elastic piece 308E. Further, two inner projections 308G are formed on both sides of the front end of the elastic piece 308E. The cylindrical portion 308C of the rear shaft 308 is inserted from the rear of the front shaft 307, and the forward movement of the elastic piece 308E is bent inward by aligning the engagement protrusion 308F of the elastic piece 308E with the key groove 307B of the front shaft 307. Let Then, the engagement protrusion 308F is engaged with the opening window 307A of the front shaft 307, and the rear shaft 308 is connected to the front shaft 307 so as to be slidable in the longitudinal direction as appropriate. Further, the engagement protrusion 308F is protruded outward from the opening window 307A of the front shaft 307. Further, a rubber grip 9 is fitted on the front portion of the front shaft 307.

  Further, in the portable state shown in FIGS. 9 and 10, the cap 315 is put on the front shaft 307 with an appropriate fitting force, and the cap 315 and the front shaft 307 are pressed against each other to press the cap 315 into the groove portion 315A of the rear shaft. The engagement protrusion 308F of 308 is detachably engaged, and the cap 315 is attached. Further, the elastic piece 308E is bent inward, and the inner protrusion 308G comes into pressure contact with the weight body 13, and the weight body 13 is fixed in the state shown in FIG. In this state, the rear end of the engagement projection 308F is brought into contact with the rear end of the opening window 307A of the front shaft 307, and the rear end of the front shaft 307 and the step portion 308B of the rear shaft 308 are appropriately separated from each other. Is done.

  Therefore, in this portable state, even if vibration occurs, the weight body 13 is fixed and cannot move, and unnecessary lead feeding is not performed.

  Next, in the case of writing, the writing state shown in FIG. 11 is obtained by removing the cap 315 and attaching the cap 315 to the rear shaft 308. In this state, since the elastic piece 308E of the rear shaft 308 is expanded outward and the inner protrusion 308G is separated from the weight body 13, the weight body 13 is located between the outer collar 2A of the connector 2 and the inner stage 14A of the tail plug 14. It is loosely slidably fitted in the longitudinal direction.

  In the case of the swing-out mechanical pencil with the cap according to the fourth embodiment, the weight body 13 is fixed by the two inner protrusions 308G formed on the respective elastic pieces 308E. The weight body 13 can be fixed.

  Hereinafter, based on FIG.12 and FIG.13, the swing-out type mechanical pencil with a cap of Example 5 in this invention is demonstrated. Note that the same members as those in FIG. 1 or FIG. First, an opening window 407A extending in the longitudinal direction is formed in the middle portion of the front shaft 407 at a relative position, and a keyway 407B is formed extending rearward from the opening window 407A. Further, a protrusion 407D is formed behind the opening window 407A of the front shaft 407, and a step portion 407C is formed behind the protrusion 407D.

  The cylindrical portion 408C of the rear shaft 408 is inserted from the rear of the front shaft 407, and the engagement protrusion 408F of the elastic piece 408E is aligned with the key groove 407B of the front shaft 407, and the elastic piece 408E is moved forward while being bent inward. . Then, the engagement protrusion 408F is engaged with the opening window 407A of the front shaft 407, and the rear shaft 408 is connected to the front shaft 407 so as to be slidable in the longitudinal direction as appropriate. Further, the engaging projection 408F is projected outward from the opening window 407A of the front shaft 407.

  Further, in the portable state shown in FIG. 12, the cap 415 is put on the front shaft 407, and the cap 415 and the front shaft 407 are pressed against each other, whereby the engagement protrusion 408F of the rear shaft 408 is attached to and detached from the groove portion 415A of the cap 415. The engaging recess 415B of the cap 415 is detachably engaged with the protrusion 407D of the front shaft 407, and the cap 415 is attached. Further, the elastic piece 408E is bent inward, and the inner protrusion 408G is pressed against the weight body 13 to fix the weight body 13. In this state, the rear end of the engaging projection 408F is brought into contact with the rear end of the opening window 407A of the front shaft 407, and the rear end of the front shaft 407 and the step portion 408B of the rear shaft 408 are appropriately separated. Is done.

  Therefore, in this portable state, even if vibration occurs, the weight body 13 is fixed and cannot move, and unnecessary lead feeding is not performed.

  Next, when writing, the cap 415 is removed, and the engaging recess 415B of the cap 415 is detachably engaged with the engaging protrusion 408H of the rear shaft 408 to achieve the writing state shown in FIG. . In this state, the elastic piece 408E of the rear shaft 408 spreads outward and the inner protrusion 408G is separated from the weight body 13, so that the weight body 13 is located between the outer casing 2A of the connector 2 and the inner stage 14A of the tail plug 14. It is loosely slidably fitted in the longitudinal direction.

  In the case of the swing-out mechanical pencil with the cap of Example 5, the engaging recess 415B of the cap 415 is engaged with the protrusion 407D of the front shaft 407 when carrying, and the cap 415 of the cap 415 is used during writing. Since the engaging recess 415B is engaged with the engaging protrusion 408H of the rear shaft 408, the cap 415 can be securely attached when carrying or writing.

  Hereinafter, based on FIG.14 and FIG.15, the swing-out type mechanical pencil with a cap of Example 6 in this invention is demonstrated. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. An opening window 507A extending in the longitudinal direction is formed at a relative position in an intermediate portion of the front shaft 507, and a keyway 507B is formed extending rearward from the opening window 507A. Further, a step portion 507C is formed behind the opening window 507A of the front shaft 507. Further, a protrusion 508A is formed at an intermediate portion of the rear shaft 508, and a step 508B is formed in front of the protrusion 508A. An outer step 508L is formed on the cylindrical portion 508C extending forward from the step portion 508B of the rear shaft 508, and an elastic piece 508E extending forward from the front end of the front cylindrical portion 508M extending further forward is formed at a relative position. . Engaging protrusions 508F projecting outward are formed at the front ends of the elastic pieces 508E. In addition, an inner protrusion 508G is formed that protrudes inwardly at an appropriate rear position from the engagement protrusion 508F of the elastic piece 508E.

  Further, a return spring 18 having a very weak elasticity is inserted into the front shaft 507 from the rear. From behind, the elastic piece 508E of the rear shaft 508 is inserted while being bent, and the return spring 18 is compressed by the inner step 507E of the front shaft 507 and the outer step 508L of the rear shaft 508, and is engaged with the opening window 507A of the front shaft 507. The mating protrusion 508F is engaged. Therefore, the front shaft 507 and the rear shaft 508 are connected so as to be slidable in the longitudinal direction as appropriate. Further, the engaging projection 508F is projected outward from the opening window 507A of the front shaft 507. Furthermore, after inserting the weight body 13 from the rear of the rear shaft 508, the tail plug 14 is detachably screwed onto the rear portion of the rear shaft 508.

  In the portable state shown in FIG. 14, after the cap 15 is put on the front shaft 507, the cap 15 and the rear shaft 508 are pressed against each other, whereby the return spring 18 is compressed and the groove 15 </ b> A of the cap 15 is compressed. The engagement projection 508F of the rear shaft 508 is detachably engaged with the cap 15, and the cap 15 is attached. Further, the elastic piece 508E is bent inward, and the inner protrusion 508G is pressed against the weight body 13 to fix the weight body 13. At this time, the rear end of the cap 15 is brought into contact with the step portion 507C of the front shaft 507, and the rear portion of the core tank 3 is brought into contact with the bottom portion of the tail plug 14, the spring 6 is compressed and the chuck 1 is expanded. In this portable state, the core 11 is not held by the chuck 1. Further, the front end of the engaging projection 508F is brought into contact with the front end of the opening window 507A of the front shaft 507, and the step portion 508B of the rear shaft 508 is brought into contact with the rear end of the front shaft 507.

  Therefore, in this portable state, even if vibration occurs, the weight body 13 is fixed and cannot move, and the chuck 1 is expanded to release the lead 11, so that unnecessary lead feeding is not performed. .

  Next, in the case of writing, the writing state shown in FIG. 15 is obtained by removing the cap 15 and attaching the cap 15 to the rear shaft 508. In this state, the chuck 1 is biased rearward by the spring 6 and the chuck 1 is closed to hold the core 11. Further, the rear shaft 508 is urged rearward by the return spring 18 so that the rear end of the front shaft 507 and the step portion 508B of the rear shaft 508 are appropriately separated from each other, and the weight body 13 has the outer flange 2A of the connector 2 and the tail plug 14. The inner stage 14A is loosely slidably fitted in the longitudinal direction.

  Writing is performed in this state, and when the lead 11 is consumed, the lead 11 is fed out as in the first embodiment. In addition, the operation of causing one core 11 to wear out and causing the next core 11 to follow is performed in the same manner as in the first embodiment.

In the case of the swing-out mechanical pencil with the cap according to the sixth embodiment, even if vibration occurs when being carried, unnecessary core feeding can be prevented and the weight body 13 is fixed and does not move. Can be carried without touching. Further, since the tail plug 14 is screwed to the rear shaft 508, there is no possibility that the tail plug 14 will come off even if the weight body 13 abuts on the tail plug 14. Furthermore, since the rear shaft 508 is urged rearward by the return spring 18, there is no fear of the rear shaft 508 swinging during writing, and writing can be performed comfortably.

  Note that the present invention is not limited to the above embodiment, and the cap, the front shaft, the rear shaft, the tail plug, etc. are illustrated as one component for the sake of simplicity of explanation. Needless to say, it is only necessary that two or more parts are screwed and fitted together, and the outer diameter shape is not limited to that shown in the drawing.

  By providing a cap, the overall length is short when carrying and easy to carry and the appearance is improved, and when writing, the full length is long and easy to write, preventing unnecessary unwinding when carrying. Applicable to swing-out mechanical pencil with cap.

DESCRIPTION OF SYMBOLS 1 Chuck 3 Core tank 6 Spring 7 Front shaft 7A Front shaft 7 opening window 8 Rear shaft 8E Rear shaft 8 elastic piece 8F Rear shaft 8 engagement protrusion 11 Core 13 Weight body 15 Cap 18 Return spring 107 Front shaft 107A Front Shaft opening window 108 rear shaft 108E elastic piece 108F rear shaft 108 engagement projection 115 cap 207 front shaft 207A front shaft 207 opening window 208 rear shaft 208E rear shaft 208 elastic piece 208F rear shaft 208 engagement Joint projection 215 Cap 307 Front shaft 307A Front shaft 307 opening window 308 Rear shaft 308E Rear shaft 308 elastic piece 308F Rear shaft 308 engagement projection 315 Cap 407 Front shaft 407A Front shaft 407 opening window 408 Rear shaft 408E Rear shaft 408 elastic piece 408F engagement projection of rear shaft 408 415 cap 507 front shaft 507 The engaging projection of the elastic piece 508F rear shaft 508 of the opening window 508 after the shaft 508E rear axle 508 of the front shaft 507

Claims (4)

  Chuck, spring for urging the chuck rearward, fastener fitted on the chuck, lead tank interlocked with the chuck, and weight body provided outside the lead tank and slidable in the longitudinal direction In the swing-out mechanical pencil that advances the chuck by the inertial force of the weight body and feeds the lead, the engaging portion of the cap and the engaging portion of the rear shaft are configured to be engageable. The cap is detachably attached to the rear part, and the abutment part of the front shaft and the rear shaft is appropriately separated, and the cap engagement part is attached to and detached from the engagement part of the rear shaft so as to cover the writing tip part when carrying. A swing-out mechanical pencil with a cap, which is capable of being engaged and has an elastic piece formed on the front part of the rear shaft bent inward to fix a weight body with the elastic piece.   An engaging protrusion protruding in the outer peripheral direction is formed at the front end of the elastic piece formed on the front part of the rear shaft, an opening window is formed on the front shaft, and the engaging protrusion on the rear shaft is engaged with the opening window of the front shaft. The swing-out mechanical pencil with a cap according to claim 1, wherein the rear shaft is connected to the front shaft so as to be appropriately slidable in the longitudinal direction.   The engagement protrusion formed on the elastic piece of the rear shaft is engaged with the opening window of the front shaft, and the engagement portion formed on the inner surface of the cap is engaged with the engagement protrusion protruding from the outer periphery of the front shaft. The swing-out mechanical pencil with a cap according to claim 2, characterized in that:   The swing-type mechanical pencil with a cap according to any one of claims 1 to 3, wherein a return spring is attached between the front shaft and the rear shaft, and the rear shaft is urged rearward in the longitudinal direction.

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