JP5406116B2 - Multi-core writing instrument - Google Patents

Description

  The present invention relates to a multi-core writing instrument in which a plurality of writing axes are accommodated in a shaft cylinder, and particularly to a multi-core writing instrument in which the writing axes can be easily exchanged.

  Conventionally, what was described in patent document 1 or 2 is known as this kind of multi-core writing instrument.

  In Patent Document 1 and Patent Document 2, a plurality of writing shafts are accommodated in a shaft cylinder so as to be movable in the front-rear direction, each writing shaft is urged rearward, and an operating body is connected to the rear end of each writing shaft. The operating body protrudes radially outward from the window hole formed in the side wall of the shaft cylinder.

  And in patent document 1, the opening part which opens a window hole back is provided in the rear end of the axial cylinder, and the operating body connected to a writing shaft and the rear end of a writing axis through this opening part is provided from the inside of the axial cylinder. It is configured to be removable and insertable into the shaft tube, and a lid that closes the opening is detachably screwed to the rear end of the shaft tube so that a plurality of writing shafts can be removed from the shaft tube and replaced. doing.

  Similarly, in Patent Document 2, an opening for opening a window hole rearward is provided at the rear end of the shaft cylinder, and the operating body connected to the writing shaft and the rear end of the writing shaft through the opening is provided in the shaft cylinder. It is configured so that it can be removed from the shaft and can be inserted into the shaft cylinder, and a lid portion that closes the opening is attached to the rear end of the shaft cylinder so that a plurality of writing shafts can be removed and replaced from within the shaft cylinder. Yes.

  Thus, in the multi-core writing instrument described in Patent Document 1 or 2, since the writing shaft and the operating body can be taken out from the rear of the shaft tube, the writing shaft and the operating body when the writing shaft is exchanged are used. Incorrect connection can be prevented.

JP 2007-15274 A JP 2007-30241 A

  However, in the multi-core writing instrument described in Patent Document 1 or 2, it is necessary to provide a lid for opening and closing the operating body and the writing shaft to open the window hole of the shaft tube rearward at the rear end portion of the shaft tube. Therefore, there is a problem that the use of the rear end portion of the shaft cylinder is limited and the degree of freedom in design is reduced.

  In addition, there is a problem that an operation for opening and closing the lid portion is required at the time of replacing the writing shaft, and the operation is troublesome.

  The present invention has been made in view of such a problem, and can increase the degree of design freedom without deteriorating the usability of the rear end portion of the shaft tube, and can easily replace the writing shaft. The object is to provide a multi-core writing instrument.

In order to achieve the above object, the first invention of the present invention is configured such that a plurality of writing shafts are accommodated in the shaft cylinder so as to be movable in the axial direction, and an operating body is connected to the rear end of the writing shaft, The operating body is inserted into a vertical hole formed in the outer peripheral surface of the rear portion of the shaft cylinder so as to be slidable in the axial direction, and the operation body is moved forward and held on the front end side of the vertical hole. In the multi-core writing instrument in which the tip of the writing shaft connected to the body protrudes from the tip of the shaft tube,
The rear end of the vertical hole is closed, and the operation body is configured to be freely inserted into and removed from the vertical hole in the radial direction. The writing shaft is connected to the operation body in the radial direction. It is characterized in that it can be freely inserted into and removed from the shaft cylinder.

The second invention is characterized in that, in the multi-core writing instrument of the first invention , the writing shaft is flexible so that it can be inserted into and removed from the longitudinal hole in the radial direction.

The third invention is the first or multicore writing instrument of the second aspect of the invention, the rear end of the operating body, and wherein the lockable locking recess in the rear end of the longitudinal hole is formed To do.

According to a fourth aspect of the present invention, in the multi-core writing instrument according to the third aspect of the invention , the operating body is once slid forward with respect to the vertical hole and released from the locking recess to be taken out from the vertical hole. Is possible.

A fifth invention, in any Kano multicore writing instrument of to first free the fourth invention, wherein the operating body, characterized in that the groove can be a clue when out in the radial direction is formed.

According to a sixth aspect, in any Kano multicore writing instrument of the fifth invention to the 1, on the outer periphery of said writing shaft, a coil spring for urging the writing shaft to the rear have been wound, of the coil spring The rear portion has a tightly wound portion or at least a portion having a pitch smaller than that of the center.

A seventh aspect to first free sixth one Kano multicore writing instrument of the invention, when the writing shaft and the operation member has been taken out toward outer shaft tube, wound around the outer periphery of said writing shaft The rear end of the coil spring is disposed near the front end of the vertical hole.

Eighth aspect based on the to first free seventh either Kano multicore writing instrument of the invention, the vertical hole comprises a front portion of the wide hole and the rear of the narrow hole made, the periphery of the narrow holes, the width It is a wide groove wider than the narrow hole, and the operating body has a wide hole and a main body that can slide through the wide groove, and a projecting portion that can slide through the narrow hole. It is characterized by.

A ninth invention is characterized in that, in the multi-core writing instrument of the eighth invention , the main body of the operating body can be locked to a locking step formed in the wide groove.

Further, the tenth invention, in any Kano multicore writing instrument of to first free the ninth aspect, the rear end of the barrel, characterized in that the eraser receptacle is provided.

  According to the present invention, since the operating body can be inserted into and removed from the vertical hole in the radial direction, the operating body and the writing shaft connected thereto can be taken out from the vertical hole when the writing shaft is replaced. It is possible to insert the operation body and the writing shaft from the vertical hole. Therefore, since the rear end portion of the shaft tube is not involved at the time of replacement, the rear end portion of the shaft tube can be used effectively, and the degree of design freedom of the rear end portion of the shaft tube can be increased.

  Further, the exchange work is simple because the operation body and the writing shaft need only be taken in and out of the vertical hole and the shaft tube.

According to the second invention, by providing the writing shaft with sufficient flexibility, it is possible to insert and remove the writing shaft in the radial direction of the vertical hole when replacing the writing shaft even if the axial length of the vertical hole is short. It can be done smoothly.

According to the third invention, the locking recess formed at the rear end of the operating body is locked to the rear end of the vertical hole, so that the writing shaft can be accommodated in the shaft cylinder. The writing axis can be prevented from inadvertently escaping from the vertical hole.

According to the fourth invention, when the writing shaft is exchanged, the operating body and the writing shaft can be released by sliding the operating body once forward to release the locking between the locking recess and the vertical hole. It can be taken out from the shaft cylinder.

According to the fifth aspect of the present invention, since the groove is formed in the operating body, it is possible to perform the work in and out using this groove as a clue.

According to the sixth aspect of the present invention, when the writing shaft is inserted into the shaft tube, it can be configured not to be caught by the rear portion of the coil spring in the shaft tube, and the tip of the writing shaft is inserted into the coil spring. It becomes easy.

According to the seventh invention, when the writing shaft and the operating body are taken out outward, the rear end of the coil spring is arranged near the front end of the vertical hole, and then the writing shaft and the operating body are When inserting, it becomes easy to let the front-end | tip of a writing shaft penetrate the inside of a coil spring.

According to the eighth aspect of the invention, when the writing shaft is replaced, the main body of the operating body can be put in and out of the wide hole or the wide groove, and the protruding portion of the operating body can be put in and out of the narrow hole at the same time. The writing shaft can be taken in and out from the wide hole into the shaft cylinder.

According to the ninth aspect , the tip of the writing shaft can be maintained in a state of protruding from the tip of the shaft tube by locking the main body of the operating body to the locking step formed in the wide groove.

According to the tenth aspect of the invention, since the degree of freedom in designing the rear end portion of the shaft tube increases, an eraser cradle can be provided at the rear end portion of the shaft tube.

It is a whole sectional view showing a multi-core writing instrument by an embodiment of the present invention (sectional view cut along line 1-1 of Drawing 4 (b)). (A) of an operation body is a side view, (b) is a perspective view. (A) of another operation body is a side view, (b) is a perspective view. (A) of a guide stopper is a longitudinal cross-sectional view, (b) is an arrow view seen from the 4b direction of (a), (c) is a perspective view, (d) is a perspective view seen from the opposite direction. (A) of the rear axis is a plan view, (b) is a longitudinal sectional view, (c) is a sectional view taken along the line 5c-5c, (d) is a sectional view seen along the line 5d-5d, (E) is sectional drawing seen along the 5e-5e line, (f) is sectional drawing seen along the 5f-5f line. It is a perspective view showing the procedure in the case of replacing the writing axis | shaft of a multi-core writing instrument. It is a whole sectional view showing the state at the time of exchange of the writing axis of a multi-core writing instrument. It is a cross-sectional view showing the relationship between the vertical hole and the operating body at the time of (a) normal time and (b) writing shaft exchange. It is a figure showing the modification of a coil spring.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In the multi-core writing instrument 10 shown in FIG. 1, the shaft cylinder 12 is mainly composed of a tip tool 13, a tip shaft 14, and a rear shaft 16. The tip of the tip shaft 14 is press-fitted into the tip 13 and is detachably connected. The rear end of the front shaft 14 is press-fitted into the adapter 18 so as not to be attached / detached, and the adapter 18 and the rear shaft 16 are detachably connected to each other by screwing. Reference numeral 19 denotes an elastic gripper provided at a grip portion of the user of the front shaft 12. In addition, the axial cylinder 12 can be comprised from a member less than the example shown in FIG. 1, or more members.

  A plurality (five in this embodiment) of writing shafts 20 and 22 are accommodated in the shaft cylinder 12. The combination of the plurality of writing axes 20 and 22 is arbitrary, and the user can select a desired combination of the writing axes 20 and 22. In the example shown in FIG. 1, a combination of four ballpoint pen shafts 20 and one mechanical pencil shaft 22 is selected as the writing axis.

  The ballpoint pen shaft 20 includes an ink storage tube 20a that stores ink, and a tip 20b that is attached to the tip of the ink storage tube 20a and incorporates a ball. The plurality of ballpoint pen shafts 20 can also be different types of combinations such as combinations of ink colors desired by the user or combinations of different ball diameters.

  The mechanical pencil shaft 22 incorporates a known lead feeding mechanism that feeds a writing lead by advancing the chuck as disclosed in Japanese Utility Model Publication No. 6-32397, for example. When the mechanical pencil shaft 22 is directed forward (by operating an operation body 26 described later) with the tip of the mechanical pencil shaft 22 protruding from the tip of the tip 13, the mechanical pencil shaft 22 protrudes from the tip 13. The tip portion not to abut against the inner wall of the tip of the tip 13 advances the lead feeding mechanism and feeds the lead.

  The combination of the writing axes is not limited to this, and may be a relatively soft writing core such as a cosmetic core such as an eyebrow or eyeliner, an eraser, or a pass. In that case, Japanese Utility Model Publication No. 6-32397 is disclosed. As shown in the above, the writing core may be sent by holding the writing core with a thin bar and sending the thin bar in the same manner as the core in the case of the mechanical pencil shaft 22.

  Operating bodies 24 and 26 are connected to the rear ends of the writing axes 20 and 22, respectively. As shown in FIGS. 2 and 3, the operation bodies 24 and 26 protrude from the main bodies 24a and 26a and the rear portions of the main bodies 24a and 26a in the outer diameter direction, and the operation protrusions 24b for the user to operate by hand. 26b and projecting portions 24c, 26c projecting in the inner diameter direction from the main bodies 24a, 26a.

  Locking claws 24d and 26d projecting rearward are formed at the rear ends of the main bodies 24a and 26a of the operating bodies 24 and 26, respectively.

  The protruding portions 24c and 26c of the operating bodies 24 and 26 are thinner than the main bodies 24a and 26a. The projecting portions 24c and 26c have a plurality of engaging pieces 24e and 26e at their inner diameter direction front ends and locking recesses 24f and 26f at their rear ends. The locking recesses 24f and 26f have inclined surfaces 24g and 26g on the inner diameter direction side.

  The operation protrusion 26b of the operating body 26 is a clip mounting base, and the clip 30 is mounted on the clip mounting base. A small groove 24 h is formed on the side surface of the operation protrusion 24 b of the operation body 24.

  In addition, at the front ends of the operating bodies 24 and 26, fitting portions 24i and 26i that are fitted into the writing shafts 20 and 22 to be connected to the writing shafts 20 and 22 are formed.

  A guide stopper 32 that guides the writing shafts 20 and 22 is fixed inside the rear shaft 16. As shown in FIG. 4, the guide stopper 32 is formed with a main body 32b formed with an insertion hole 32a through which the writing shafts 20 and 22 are inserted, and a guide path 32c extending backward from the insertion hole 32a of the main body 32b. And a guided portion 32d.

  Between the main body 32b of the guide stopper 32 and each operation body 24, coil springs 33, which are elastic bodies, are respectively inserted. Each coil spring 33 is wound around the outer periphery of each writing shaft 20, 22 and always urges each writing shaft 20, 22 backward.

  As the coil spring 33, a normal spring having a uniform pitch except for both ends can be used. However, preferably, as shown in FIG. It is better to use a spring having a smaller and higher density part. Alternatively, a spring having a tightly wound portion at the rear portion may be used.

Each operation body 24, 26 is inserted into a vertical hole 16a formed in the rear side wall of the rear shaft 16 so as to be slidable in the axial direction. As shown in FIG. 5, each vertical hole 16a has a wide hole 16a1 having a wide hole at the front portion and a narrow hole 16a2 having a narrow hole width at the rear portion, and the rear end of the narrow hole 16a2 is opened. However, the rear end of the vertical hole 16a is closed. The periphery of the narrow hole 16a2 is a wide groove 16b having the same width as the wide hole 16a1. The main bodies 24a and 26a of the operating bodies 24 and 26 can be inserted into the wide hole 16a1 and the wide groove 16b, while the protruding portions 24c of the operating bodies 24 and 26 are inserted into the narrow hole 16a2. Only 26c can be inserted. A locking step portion 16c is formed in the middle of the wide groove 16b in the front-rear direction, and a shallow groove 16b1 is formed in a portion of the wide groove 16b behind the narrow hole 16a2.

  Preferably, an enlarged portion 16a3 having a groove width wider than the narrow hole 16a2 and narrower than the wide groove 16b is formed at the rear end portion of the narrow hole 16a2.

  A circular opening 16d is formed on the rear end surface of the rear shaft 16, and an eraser cradle 34 is provided behind the opening 16d. The eraser cradle 34 is formed integrally with the rear shaft 16, but is not limited thereto, and may be a separate body.

  An eraser 36 is inserted into the eraser cradle 34, and an eraser cover 38 that protects the eraser 36 when not in use is detachably attached to the eraser cradle 34.

  In the multi-core writing instrument 10 configured as described above, in a state where all the writing shafts 20 and 22 are accommodated in the shaft cylinder 12, the locking recesses 24f of the operating bodies 24 and 26 of all the writing shafts 20 and 22 are provided. 26f are engaged with the rear end of the narrow hole 16a2 of the vertical hole 16a (see the operation body 26 in FIG. 1). For this reason, the writing shafts 20 and 22 are in the shaft cylinder 12 and do not inadvertently escape. Further, even if the clip 30 is swung for use, the operating body 26 does not inadvertently escape.

When the writing shafts 20 and 22 are used, any one of the writing shafts 20 and 22 is projected. Therefore, sliding forward along the one of the operating projection 24 b of the operation body 24 or the operation projection 26 b or clips 30 a vertical hole 16a of the operating body 26, which is connected to a desired writing shafts 20,22 When moved, the main bodies 24a and 26a of the corresponding operating bodies 24 and 26 move along the wide holes 16a1 and the wide grooves 16b, and the projecting portions 24c and 26c of the operating bodies 24 and 26 move along the narrow holes 16a2. Moving. When the corresponding main bodies 24a and 26a pass through the locking step portion 16c, they can be immersed in the inner diameter direction of the vertical hole 16a. When the operation is stopped, the locking claws 24d and 26d are locked to the locking step 16c, so that the advanced state is maintained. It protrudes from the tip and is ready for use (see writing axis 20 in FIG. 1).

In order to switch the writing axes 20 and 22 to be used from this state, the operation protrusion 24 b of any one operation body 24 connected to another desired writing axis 20 or 22 or the operation protrusion of the operation body 26. the section 26 b or clip 30 along the longitudinal hole 16a is slid forward. Then, the engaging pieces 24e, 26e of the projecting portions 24c, 26c of the other operating bodies 24, 26 are protruding, and the engaging pieces of the projecting portions 24c, 26c of the operating bodies 24, 26 of the writing shafts 20, 22 projecting. 24e and 26e interfere with each other and push out the operating bodies 24 and 26 that have been protruding so far, so that the operating bodies 24 and 26 are released from the locking and returned to the rear by the urging force of the spring 33. . Instead, since the locking claws 24d and 26d of the operating bodies 24 and 26 connected to another desired writing shafts 20 and 22 are locked to the locking step portion 16c, the desired writing shafts 20 and 22 are provided. Maintains the advanced state and becomes usable.

Next, a case where the writing axes 20 and 22 are consumed or a case where the writing axes 20 and 22 are desired to be changed will be described with reference to FIGS. 6 and 7. The operating projections 24 b and 26 b of the operating bodies 24 and 26 connected to the writing shafts 20 and 22 to be replaced are grasped and pulled out radially outward from the vertical holes 16 a. At this time, when the writing shaft 20 is once slid forward against the spring force of the spring 33 and then pulled outward in the radial direction, the engagement with the narrow holes 16a2 of the locking recesses 24f and 26f. Since the stop is released, it can be taken out. At this time, the inclined surfaces 24g and 26g assist in releasing the locking.

  Further, as shown in FIG. 8, the operating bodies 24 and 26 have a structure that can be easily removed outward without any hooks that are caught in the vertical holes 16a. Since the clip 30 is provided, the structure is easy to pull outward using these as a clue. When the operating bodies 24 and 26 are taken out from the vertical holes 16a, the engagement pieces 24e and 26e of the operating bodies 24 and 26 pass through the vertical holes 16a smoothly without interfering with the wide grooves 16b by the shallow grooves 16b1. Can be done.

  Then, using the flexibility of the writing shafts 20 and 22 themselves, the writing shafts 20 and 22 are pulled out following the operating bodies 24 and 26. The writing shafts 20 and 22 can be taken in and out of the shaft cylinder 12 through the wide holes 16a1 of the vertical holes 16a. At this time, the rear end of the spring 33 wound around the outer periphery of the writing shafts 20 and 22 interferes with the rear shaft 16 in the vicinity of the front end of the vertical hole 16a of the rear shaft 16 so that it cannot be further retracted. It is good to be.

  Then, in a state where the other writing shafts 20 and 22 after replacement are connected to the operating bodies 24 and 26 by the opposite procedure, the writing shafts 20 and 22 are inserted into the vertical holes 16a from the tips thereof, and the front ends of the vertical holes 16a It is inserted inside the spring 33 waiting in the vicinity and inserted into the shaft cylinder 12. Thus, the replacement work can be completed. If the rear portion of the coil spring 33 has a small pitch or is a tightly wound portion, there is no risk that the tip of the writing shaft 20 or 22 will be caught by the coil spring 33 when inserting the writing shafts 20 and 22, and the insertion work should be performed smoothly. Can do.

  As described above, since the operating bodies 24 and 26 are configured to be able to be taken in and out in the radial direction with respect to the vertical hole 16a, the replacement work is simple. However, in the normal use state, the operating bodies 24 and 26 are connected to the writing shafts 20 and 22 accommodated in the shaft cylinder 12, and the locking recesses 24f and 26f of the operating bodies 24 and 26 are vertically Since it is locked to the rear end of the hole 16a, the operating bodies 24 and 26 are not inadvertently detached from the vertical hole 16a.

  Further, since the operating bodies 24 and 26 and the writing shafts 20 and 22 are taken in and out in the radial direction of the vertical hole 16a, the rear end of the rear shaft 16 has an influence on the insertion and removal of the operating bodies 24 and 26 and the writing shafts 20 and 22. Not. That is, in this example, the rear end of the vertical hole 16a is closed by the eraser cradle 34 or the like, and is used as a storage space for the eraser. In this way, the degree of freedom in designing the rear end portion of the shaft cylinder 12 can be increased. Effective use of the rear end portion of the shaft tube 12 is not limited to storing the eraser, and can be arbitrarily used.

DESCRIPTION OF SYMBOLS 10 Multi-core writing instrument 12 Shaft cylinder 16a Longitudinal hole 16a1 Wide hole 16a2 Narrow hole 16b Wide groove 16c Locking step part 20 and 22 Writing shaft 24 and 26 Operation body 24a and 26a Main body 24c and 26c Projection part 24f and 26f Locking Recess 24h Small groove 33 Coil spring 34 Eraser cradle

Claims (7)

A plurality of writing shafts are accommodated in the shaft cylinder so as to be movable in the axial direction, and operating bodies are connected to the rear end of the writing shaft, and each operating body is axially inserted into a vertical hole formed in the rear side wall of the shaft cylinder. The tip of the writing shaft connected to the operating body protrudes from the tip of the shaft tube by inserting one operating body forward and holding it at the front end side position of the vertical hole. In the multi-core writing instrument to be in a state,
The rear end of the vertical hole is closed, and the writing shaft connected to the operation body is accommodated in the shaft cylinder by locking the rear end of the operation body to the rear end of the vertical hole. Can be held in a state,
The operating body is configured to be freely inserted and removed in the radial direction with respect to the vertical hole.
Writing axis is in a state of being connected to the operating member, Ri and out freely der against the barrel through the longitudinal hole rear end is blocked radially
The vertical hole includes a front wide hole and a rear narrow hole, and the periphery of the narrow hole is a wide groove wider than the narrow hole. It has a main body that can slide through the wide groove and a projecting part that can slide through the narrow hole,
The wide groove is formed with a locking step that can lock the main body of the operating body,
By holding the operating body forward to the front end side of the vertical hole and locking the main body of the operating body to the locking step, the tip of the writing shaft connected to the operating body is held in a state protruding from the tip of the shaft cylinder. It is multi-core writing instrument and said Rukoto. A plurality of writing shafts are accommodated in the shaft cylinder so as to be movable in the axial direction, and operating bodies are connected to the rear end of the writing shaft, and each operating body is axially inserted into a vertical hole formed in the rear side wall of the shaft cylinder. The tip of the writing shaft connected to the operating body protrudes from the tip of the shaft tube by inserting one operating body forward and holding it at the front end side position of the vertical hole. In the multi-core writing instrument to be in a state,
The rear end of the vertical hole is closed, and the writing shaft connected to the operation body is accommodated in the shaft cylinder by locking the rear end of the operation body to the rear end of the vertical hole. Can be held in a state,
The operating body is configured to be freely inserted and removed in the radial direction with respect to the vertical hole.
The writing shaft is connected to the operating body, passes through a vertical hole whose rear end is closed in the radial direction, and can be inserted into and removed from the shaft cylinder.
A shallow groove extending from the rear edge of the vertical hole is formed behind the vertical hole on the outer periphery of the shaft cylinder,
It said operating body in and out in a radial direction relative to the longitudinal hole, the multi-core writing instrument you characterized that you move the end portion of the inner peripheral side of the operating body along the shallow grooves.   The multi-core writing instrument according to claim 1, wherein a locking recess that can be locked to a rear end of the vertical hole is formed at a rear end of the operation body. 4. The multi-core writing instrument according to claim 3 , wherein the operating body is once slid forward with respect to the vertical hole to release the locking from the locking recess. A coil spring for biasing the writing shaft backward is housed in the shaft cylinder,
When the writing shaft is inserted into the shaft cylinder through the vertical hole, the tip of the writing shaft is inserted inward from the rear end of the coil spring, and the coil spring is wound around the outer periphery of the writing shaft,
The multi-core writing instrument according to any one of claims 1 to 4 , wherein a rear part of the coil spring has a tightly wound part or a part having a pitch smaller than at least the center. When the writing shaft is taken out of the shaft cylinder through the vertical hole, the rear end of the coil spring wound around the outer periphery of the writing shaft is arranged near the front end of the vertical hole in the shaft cylinder. The multi-core writing instrument according to any one of claims 1 to 5 , wherein: An eraser cradle is provided at the rear end of the shaft cylinder, and the rear end of the shaft cylinder is closed by the eraser cradle, and the writing shaft is connected to the operating body in the state where the eraser is connected. The multi-core writing instrument according to any one of claims 1 to 6 , wherein the multi-core writing instrument is capable of passing in and out of a shaft cylinder through a vertical hole whose rear end is closed by a cradle in a radial direction.

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