JP4485843B2 - Composite writing instrument - Google Patents

Description

  The present invention relates to an improvement of a dual-type writing instrument in which a writing member is selectively locked and protruded from a tip hole of a tip shaft by sliding a knock member toward the tip of the shaft.

JP 2001-225588 A Japanese Utility Model Laid-Open No. 7-11382 (Patent Document 1) The shaft body has a plurality of writing bodies, and the writing bodies are urged toward the rear of the shaft body by a resilient member, but are attached to the rear end of the writing body. 2. Description of the Related Art There is generally known a dual-type writing instrument in which a member is advanced to engage a knock member with a shaft body so that a writing body protrudes from the shaft body. (Patent Document 2) A knock type writing instrument is shown in which a writing tip can be projected and retracted from an axis by knocking a pressing member provided at a rear end. This knock-type writing instrument protects the pressing member from external force so that the pressing member is not knocked for the purpose of avoiding the problem that the pen tip protrudes and soils the pockets and clothes, etc. A shielding member is attached.

  An object of the present invention is to prevent the above-mentioned double-type writing instrument from being inadvertently knocked at the time of carrying or the like. It is an object of the present invention to provide a locking device that looks good and does not interfere with writing or carrying.

The present invention has the following configuration in order to achieve the above-described problems.
The compound writing instrument according to the invention of claim 1 is configured such that the operation portions of a plurality of knock members connected to the writing body are protruded into the respective longitudinal grooves provided to the rear end portion of the rear shaft, and the respective knock members are disposed in the axial direction. In a dual-type writing instrument that selectively locks the writing part by projecting from the tip hole of the front shaft by sliding, a slider that slides within an appropriate range in a direction substantially perpendicular to the axis is provided at the rear end of the rear shaft. A locking portion is provided on the front end side of the slider in the axial direction, and on the other hand, a locking step portion is formed inside the rear end portion of each knock member so that the knock member is retracted to the rear end side of the rear shaft. When the slider is slid and moved to one side in the state, the locking portion of the slider is engaged with the locking step portion of the knock member, and the advancement of the knock member is prevented, and the slider is moved to the opposite side. When sliding, the slider's locking part is the locking step of the knock member. Locking device is forward of the knock member becomes freely and disengaged are thus provided from.

  The compound writing instrument of the present invention can lock the knock portions provided at a plurality of locations by a simple operation, and can prevent the knocking portion from being inadvertently knocked when being carried. In addition, if the writing tip portion is locked in a protruding state, it is possible to prevent the writing tip protrusion from being inadvertently detached and the writing tip portion from being immersed. Furthermore, the locking device looks good and does not get in the way of writing or carrying.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 12 show an embodiment of the present invention. First, FIG. 1 shows a dual-type writing instrument in which three color ballpoint pens are slidably arranged as a writing body. (In the drawing, only two cursive letters are shown for the sake of perspective.) The cursive letter may be a mechanical pencil as well as a ballpoint pen. Reference numeral 1 denotes a shaft main body, and the shaft main body 1 includes a front shaft 2, a rear shaft 3, and a middle piece 6. Further, the front shaft 2 is configured such that the front shaft 5 and the middle shaft 4 are detachably fixed by means such as screwing. (It should be noted that the front shaft and the middle shaft can be formed integrally for convenience of design.)

The rear shaft 3 is formed with three longitudinal grooves 3a in the longitudinal direction, a step portion 3d is provided on the outer peripheral portion at the front end position of the longitudinal groove 3a, and the shaft portion 3g in front of the step portion 3d communicates with the longitudinal groove 3a. Slightly wide slit portions 3i are formed respectively.
The shaft portion 3g has a leg shape divided by a slit portion 3i. An engagement protrusion 3h is formed at an end of the shaft portion 3g, and a groove portion 3j is formed in the longitudinal direction of the outer peripheral portion of the shaft portion. Is formed. In the embodiment, the number of ball-point pens indicated by the cursive body 11 is 3, but the number of the longitudinal grooves 3a and the slit portions 3i varies depending on the number of the cursive bodies 11. The slit portion 3 i is formed up to the front end of the rear shaft 3. Further, ribs 3b are formed on both sides of the vertical groove 3a. The rib 3b is formed on both sides of the vertical groove 3a not to extend over the entire length but to a substantially intermediate portion, and the front end of the rib 3b is a stepped portion 3c that engages a rear end locking portion 9b of a knock member described later. Yes. Further, a groove 3e is provided on one side of the rear end of the rear shaft 3 in a direction perpendicular to the axis, and a recess 3f is provided on the front end side of the groove 3e in the axial direction. As an example, the groove 3e is provided as a rectangular or oval groove.

  As shown in FIG. 1 and FIG. 11, a locking engagement portion 8a is formed on the side surface of the slider 8, and a leg portion 7a is formed on the front end side thereof, and a hook-like engagement portion 7b is formed on the front end thereof. The body 7 is provided integrally. The slider 8 and the locking body 7 may be fixed to each other by separate members or may be integrated. The locking body 7 is inserted into the recess 3f of the rear shaft 3, and the slider 8 is fitted into the groove 3e. The slider 8 is slidable within a certain range with respect to the groove 3e, and has an appropriate sliding resistance between the slider 8 and the groove 3e so as to prevent detachment from the groove 3e and not to slide freely. In addition, it is desirable to be provided so as to be appropriately engaged at both ends of the sliding range. The convex engaging portion 8a provided on the side surface of the slider 8 is one means for fulfilling such a role. The convex portion on one side surface of the slider 8 and the groove portion 3e or the concavo-convex shape on both side surfaces. It is possible to achieve this by forming the engaging portion.

  Further, as shown in FIG. 7, a projecting piece 4 a is provided at the rear end 4 c of the middle shaft 4. The protrusions 4a have positions and numbers corresponding to the longitudinal grooves 3a of the rear shaft, and the width between both side surfaces 4b of the protrusions 4a is substantially the same as or slightly larger than the width of the longitudinal grooves 3a of the rear shaft. As will be described later, the rear piece and the middle shaft are defined by preventing the ratchet at the joint between the middle shaft and the rear shaft by engaging the projecting piece with the vertical groove and by regulating the divided leg-shaped shaft portion that is easily deformed. Facilitates assembly. Furthermore, in order to make it more effective, a slight linear protrusion or a partial slight protrusion is provided on the side surface 4b of the protrusion 4a so that the protrusion engages with the vertical groove. It is also possible.

Further, at the inner hole intermediate portion of the middle shaft 4, a step portion 4 e that engages with the engagement protrusion 3 h when the rear shaft 3 is assembled and an engagement protrusion 4 f are formed in front of the step portion 4 e.
Further, a plurality of protrusions 4d are formed in the longitudinal direction behind the engaging step 4e, and a groove 3j formed on the shaft 3g of the rear shaft 3 is engaged with the protrusion 4d to assemble it. Sometimes the shaft portion 3g is guided and the rear shaft is prevented from rotating relative to the middle shaft. In addition, the engagement of the protrusion 4d and the groove 3j is not limited to the above embodiment, but is engaged with each other like a dovetail in consideration of deformation in the diameter reducing direction of the leg-shaped shaft portion 3g. The shape to be set is set. (Not shown)

  Further, the middle piece 6 has an insertion hole for each cursive body 11 and is formed with a body portion 6 a on the rear side. When the middle piece 6 is assembled to the middle shaft 4, the engagement protrusion 4 f is formed on the outer periphery of the middle piece 6. The middle piece 6 is fixed to the middle shaft 4 by engaging with the formed engagement groove 6 c by elastic deformation.

Next, the assembly order will be described.
First, a writing body 11 such as a ballpoint pen is connected to the connecting portion at the front end of the knock member 9. Next, the operation portion 9 a of the knock member 9 is pushed in and fitted into the vertical groove 3 a of the rear shaft 3. In each state where each knock member 9 is fitted on the rear shaft 3, the elastic member 10 is fitted on each writing body 11. With the above configuration, the rear shaft 3 is unitized.
The knock member 9 can be inserted into the rear shaft 3 in a single state, or after the rear shaft 3 is engaged with the middle shaft 4, the knock member 9 to which the writing body 11 is connected can be inserted. It is.

  Next, the unitized rear shaft 3 is inserted into the middle shaft 4. At this time, the projecting piece 4 a is fitted into the slit portion 3 i and the groove portion 3 j formed in the shaft portion 3 g of the rear shaft 3 is inserted into the middle shaft 4. The rear shaft 3 is positioned with respect to the middle shaft 4 by being pushed in and inserted in accordance with the protrusion 4d. When the rear shaft 3 is further pushed into the middle shaft 4, the rear shaft step 3d comes into contact with the rear end 4c of the middle shaft, and the projecting piece 4a of the middle shaft engages with the longitudinal groove 3a of the rear shaft. 3 is engaged with the step 4e of the inner hole of the inner shaft 4, and the rear shaft 3 and the inner shaft 4 are in a temporarily fixed state. Since the shaft portion 3g of the rear shaft 3 has elasticity, the engagement protrusion 3h of the rear shaft 3 is opened to the outside at the position of the step portion 4e of the middle shaft 4 while being reduced in diameter, and is engaged with the step portion 4e. .

Next, the intermediate piece 6 is inserted into the intermediate shaft 4 in the temporarily fixed state. At this time, the shaft portion 3g of the rear shaft 3 is guided and inserted into the groove portion 6b formed in the longitudinal direction of the trunk portion 6a of the intermediate piece. Then, the body portion 6 a is fitted into the slit portion 3 i of the rear shaft 3. Here, the middle piece 6 is positioned with respect to the middle shaft 4 in the temporarily fixed state. When the middle piece 6 is further pushed into the middle shaft 4, the engagement groove 6 c of the middle piece 6 is engaged with the engagement protrusion 4 f of the middle shaft 4, and the middle piece 6 and the middle shaft 4 are fixed. It is possible to push the middle piece 6 into the middle shaft 4 by screwing the front shaft 5.
That is, the engagement protrusion 3h formed on the shaft portion 3g of the rear shaft 3 is engaged with the step portion 4e of the middle shaft with a weak pushing force, so that the rear shaft 3 and the middle shaft 4 are temporarily fixed, and the trunk portion 6a of the middle piece 6 is secured. Is inserted into the slit portion 3 i of the rear shaft 3 to prevent the shaft portion 3 g from being reduced in diameter, and the rear shaft 3 is firmly fixed to the middle shaft 4.

Further, the bullet member 10 is prevented from moving forward by the middle piece 6 and urges the writing body 11 backward. Finally, the front shaft 5 is fixed to the middle shaft 4 by screwing or the like.
The intermediate piece 6 urges the writing body 11 backward by locking the front end of the elastic member 10, so that the fixing force with respect to the intermediate shaft 4 is basically the urging force of the elastic member 10. It is sufficient to withstand the force to endure and the force to disengage the connection between the front end of the knock member 9 and the rear end of the cursive body 11 when replacing the cursive body.

  In addition, a step portion for contacting the front end of the elastic member 10 is formed in the vicinity of the front end of the slit portion 3i of the rear shaft 3, and as described above, the protrusion 4d and the groove portion 3j are joined to each other like a dovetail groove or the like. If the engagement protrusion 3h at the front end of the shaft portion 3g can be elastically deformed, the rear shaft and the middle shaft that can withstand actual use can be fixed with a structure in which the middle piece 6 is omitted. It is. (Not shown)

(Function)
Next, the operation will be described.
When the slider 8 is moved toward the clip 3k, the hook-shaped locking portion 7b is disengaged from the locking step 9c of the knock member 9 (see FIG. 3), and the operation portion of the selected knock member 9 is operated. When 9a is pressed forward, the knock member 9 moves forward with the writing body 11 while being guided by the longitudinal groove 3a and the slit portion 3i, and at the same time the tip of the writing body 11 protrudes from the tip of the front shaft 5, the knock member 9 Is pushed into the rear shaft 3, and then the rear end locking portion 9b of the knock member 9 is engaged with the step portion 3c of the rib 3b, thereby preventing the writing body 11 from retreating. Further, when storing the writing body 11 from this state, the knocking member on the protruding side is retracted by pressing the other knocking member 9, and the writing body is protruded by moving forward instead.

  When the slider 8 is moved to the side opposite to the clip 3k while the writing body 11 is immersed in the front shaft 5, the hooked locking portion 7b is engaged with the locking step portion 9c of the knock member 9. Thus, each knock member 9 cannot be pushed forward, and the knock operation is locked. (However, strictly speaking, in consideration of design variations, there is a slight gap between the two engaged with each other, and the gap moves between them.) Can be prevented. When the lever 7 is moved toward the clip 3k with the tip of the writing body 11 protruding from the tip of the front shaft 5, the knock member connected to the other writing body is locked, and the writing tip protruding during writing or the like. It is possible to prevent a problem that the part is inadvertently immersed in the front shaft. Note that this is easily achieved by adopting a structure in which the locking of the protruding curl knock member cannot be released unless the knock member of the other cursive object is advanced as a condition for retreating the protruding curl knock member. Is possible.

(Other embodiments)
The operation part of a plurality of knock members connected to the cursive body is projected into the respective longitudinal grooves provided to the rear end of the rear shaft, and the respective write members are selectively slid by sliding each knock member forward. There are various types of dual-type writing instruments that are projected and locked from the front end holes, not limited to the above-described embodiments, and the locking device proposed in the present invention can be widely applied.

It is the longitudinal cross-sectional view which shows the whole compound writing instrument which is an Example of this invention, and has shown the state locked so that a knock member might not operate | move. It is the figure which expanded and showed the locking device site | part in FIG. It is the figure which expanded and showed the state which cancelled | released the lock | rock. It is AA sectional drawing of FIG. It is CC sectional drawing of FIG. It is BB sectional drawing of FIG. It is a longitudinal half sectional view of a rear axis and a middle axis. It is a front view of Nakakoma. It is a front view of a knock member. It is a side view of a knock member. It is a front view of the state which attached the latching body to the slider. It is a longitudinal cross-sectional view of a front shaft.

Explanation of symbols

1 shaft body 2 front shaft 3 rear shaft 3a longitudinal groove 3b rib 3c step portion 3d step portion 3e groove portion 3f recess 3g shaft portion 3h engagement protrusion 3i slit portion 3j groove portion 3k clip 4 middle shaft 4a protruding piece 4b side end 4c protruding end 4d Part 4e Step part 4f Engagement projection 5 Lead shaft 6 Middle piece 6a Body part 6b Groove part 6c Engagement groove 7 Engagement body 7a Leg part 7b Engagement part 8 Slider 9 Knock member 9a Operation part 9b Rear end engagement part 9c Engagement Stop part 10 Elastic member 11 Cursive body

Claims (1)

The operation part of a plurality of knock members connected to the cursive body is projected into the respective longitudinal grooves provided to the rear end of the rear shaft, and the respective write members are selectively slid by sliding each knock member forward. In the double-type writing instrument designed to protrude and lock from the tip hole of
At the rear end of the rear shaft, a slider that slides within an appropriate range in a direction substantially perpendicular to the axis is provided, and a locking portion is provided on the front end side of the slider in the axial direction, while inside the rear end portion of each knock member When the slider slides toward the one side while the knock member is retracted to the rear end side of the rear shaft, the slider latching portion is engaged with the knock member. Engagement with the stepped portion prevents the knock member from moving forward, and when the slider is slid to the opposite side, the slider locking portion is disengaged from the locking stepped portion of the knock member and the knocking member advances. A dual-type writing instrument provided with a locking device that can be freely used.

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