JP4745631B2 - Writing instrument with seal - Google Patents

Description

  The present invention relates to a composite writing instrument with a seal to which a seal is attached and a plurality of objects to be fed such as a unit of a writing body are mounted.

Utility model registration number 2510984 Utility model registration number 2525535

  Conventionally, using a printing body formed of a porous stamping material having countless continuous pores such as sponge rubber capable of occluding ink, a seal that does not need to be attached to vermilion etc. is attached to the back end of the shaft every time it is used. A writing instrument with a seal is known. Also, if the printing surface of the seal is left exposed, the printing surface will be scratched, dust will adhere, and the ink will dry out, so it is necessary to cover the printing surface to prevent it. However, when the covering means is a cap with a bottom, it is troublesome to attach and detach. It is easy to lose the cap with the bottom. It is easy to get your hands dirty by touching the seal when attaching or removing the cap with the bottom. Therefore, a lid that can be freely opened and closed is provided at the opening at the rear end of the cap, so that the printing surface is covered with the lid when not in use without touching the lid, and the printing surface is opened when stamping. A writing instrument with a seal that can be operated easily has been developed and is publicly known. Furthermore, a compound writing instrument in which a plurality of writing bodies such as a mechanical pencil and a ballpoint pen are mounted and selected so that each writing tip can be projected and retracted from the shaft tip is known.

In Patent Document 1, a tip end portion of a guide tube 2 provided with a plurality of axial guide grooves 1 is joined to a rear end portion of a front shaft 3, and a unit 4 of a shear pencil is fitted in each guide groove 1 of the guide tube 2. The cam followers 5 attached to the rear ends of the various to-be-delivered members are loosely fitted in the axial direction so as to be freely slidable. The cam followers 5 come into contact with the outer periphery of the guide tube 2 and are displaced in the axial direction. A cam slope 6 that can be moved is provided on the inner surface portion, and a seal 7 is mounted on the rear end portion thereof, and a rear shaft 8 is rotatably mounted in a circumferential direction at a required angle, and a cap 9 is provided on the outer peripheral portion of the rear shaft 8. The circumferential rotation of the print cover 10 in the seal 7 is carried out by sliding the cap 9 in the axial direction forward by sliding the cap 9 in the axial direction forward. The inner end of the cap 11 is opened and pressed by pressing the inner surface of the cap against the portion. A lid 13 that closes the rear end 11 of the cap is rotatably attached to the rear shaft 8 by the action of a spring 12 that is separated from the printing body cover 10 by sliding rearward in the axial direction 9 and between the cap 9. On the other hand, a locking device 14 is provided between the cap 9 and the rear shaft 8 so as to fix the cap 9 to the rear shaft 8 at a position where the cap 9 is slid in the axial direction and the lid 13 is opened and closed. A double writing instrument with a seal is shown.
In Patent Document 2, a seal 4 using a printing body 5 made of a porous printing material having countless continuous pores that can be impregnated with ink at the rear end of the shaft is attached in a state where the printing surface is exposed, and the rear of the shaft A cap 9 having an open top end is fitted to the outer periphery of the end so as to be slidable in the axial direction, and the cap 11 is retreated with respect to the shaft in the top end opening 11 of the cap 9 so that the opening 11 acts on the spring 13. When the cap 9 is moved forward with respect to the shaft, the inner end of the seal 4 is pressed by a part of the peripheral edge of the rear end of the cover 6. The lid 12 that opens the top end opening 11 of the cap 9 and protrudes the seal 4 rearward from the cap 9 is attached by swinging the cap 9 and the front end is engaged with the cap 9 through the long hole 19 of the cap 9. Protrusion 17 is provided at the rear end A lever 16 provided with a push button 18 urged by a coil spring 20 from the window hole 15 of the lip 14 to the outside of the clip 14 is disposed on the inside of the clip 14 so that its substantially central portion can be pivotally mounted. In addition, when the cap 9 slides forward and the seal 4 protrudes from the top end opening 11 of the cap 9 at two front and rear positions on the side surface of the shaft inside the cap, the cap 9 slides backward. When the top end opening 11 of the cap 9 is closed by the lid body 12, engagement grooves 21 'and 21 are provided for engaging and locking the engagement protrusions 17 respectively. A double writing instrument is shown.

This invention makes the following items a solution subject with respect to the prior art of the double writing instrument with a seal stamp.
(1) The lid can be easily opened and closed even with one-handed operation.
(2) It is possible to easily switch the specifications between a dual-type writing instrument including a mechanical pencil writing body that requires a knock operation for feeding out the lead and a double-type writing instrument including only a writing body such as a ballpoint pen that does not require a knock operation.
(3) The assembly is facilitated and can be provided at low cost.

The present invention has the following configuration in order to achieve the above-described problems.
When the front end of the guide tube is joined to the rear end of the front shaft, the compound writing instrument according to the first aspect of the invention has a middle shaft so that the front end contacts the rear end of the front shaft and is fixed to the guide tube. A sliding piece is attached to each guide groove of the guide cylinder fixed to the guide cylinder and provided with a plurality of guide grooves in the axial direction at the rear end of the writing body such as a ballpoint pen. A return spring is laid in between, and the sliding piece is urged rearward of the guide cylinder, and the sliding piece is slidably fitted in the guide groove so as to be slidable in the axial direction. A cylindrical cam that has a cam slope that is displaced in the axial direction that allows the sliding piece to slide in the axial direction when in contact with the moving piece is fixed integrally on the inner surface of the rear shaft, and a seal is attached to the rear end. At the same time, it is pivotable at a required angle in the circumferential direction with respect to the guide tube, and is secured to the rear by retaining it. Selectively enabling retractable tip cursive when the rear axle has rotated from the shaft away against the center shaft, and a substantially circular cross section of the cylindrical body the upper surface of the rear axle is a flat, circular Sliding grooves along the axial direction are provided on both side surfaces of the slightly thickened portion connecting the circumferential surface and the flat end, and ribs that fit into the sliding grooves are provided on the inner surface of the slide cap. provided, the total length with respect to the entire length of the rear axle is Shi Na and part-length front end circumferential direction of the rotation axial integral slide key guy flop which is retracted inclined to the rear shaft on the side opposite to the clip side Is slidably fitted to the rear end of the slide cap, and the inner surface of the seal cover is pressed against the corner of the seal by sliding the slide cap forward in the axial direction with respect to the rear shaft. This opens the rear end of the slide cap and slides the slide cap to the rear in the axial direction. A lid that closes the rear end of the slide cap is pivotally attached by the action of a torsion spring provided away from the print cover and between the slide cap and the slide cap is slid in the axial direction relative to the rear shaft. A locking device for fixing the slide cap to the rear shaft at each position where the lid is opened and closed, and is provided between the slide cap and the rear shaft, and the locking device comprises at least a locking lever and a rear shaft. When the spring is pressed against the urging force of the spring, the convex locking portion provided at the front end of the arm of the locking lever is locked with one of the two concave portions provided on the rear shaft. When the button is released and the button is not pressed, the convex locking portion is locked with any of the concave portions .

According to a second aspect of the present invention, there is provided a dual writing instrument according to the first aspect, wherein a shear pencil pencil is disposed in at least one of the guide grooves, and a shear pencil pencil is provided. In a state where the tip portion protrudes from the shaft tip, a gap corresponding to a knock stroke necessary for the cylindrical cam to shift the shaft is secured between the rear end of the middle shaft and the front end of the rear shaft.
The compound writing instrument according to the invention of claim 3 is the compound writing instrument according to claim 1 or 2, wherein the sliding groove of the rear shaft has a stopper having a stepped portion on the rear end side and a slope on the front side. The rib on the inner surface of the slide cap is inserted from the front of the stopper, elastically climbs over the stopper and fits into the sliding groove, and the front and rear ends of the rib contact the stopper and the rear end of the rear shaft sliding groove. It is provided so as to slide at a contact interval.

In the present invention, an axial sliding groove is provided on the peripheral surface portion of the rear shaft, a rib that is fitted into the sliding groove is provided on the inner surface of the slide cap, and the total length of the slide cap is shorter than the total length of the rear shaft. With the size, the lid can be easily opened and closed even with one-handed operation.
Further, when the front end of the guide tube is joined to the rear end of the front shaft, the rear end of the front shaft abuts on the front end of the middle shaft fixed to the guide tube, and the middle shaft is fixed to the guide tube. It is possible to easily switch between specifications of compound writing instruments including mechanical pencil writing instruments that require knock operation to replace cores with different cores, and compound writing instruments that only use writing instruments such as ballpoint pens that do not require knock operation. Become.
Further, the improvement of the shape of the member and the engagement shape between the members facilitates the assembly and can be provided at low cost.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the guide cylinder 4 is shown in FIGS. As shown in the figure, the guide tube 4 is integrally formed with a tube portion 4a at the front, a shaft portion 4b at the middle, and a shaft portion 4c having a smaller diameter than the outer diameter of the shaft portion 4b at the rear end. Axial guide grooves 4m and 4n are provided at two locations on the side surface, and a screw portion 4d is formed on the front end side peripheral surface of the cylindrical portion 4a. The screw portion 4d is formed on a rear end inner peripheral surface of the front shaft 3 which will be described later. It can be detachably joined by screwing with the formed screw portion.
Further, a circumferential step 4e is formed appropriately behind the screw portion 4d of the cylindrical portion 4a, and a small rib-like locking projection 4f is formed at a required position slightly behind the step 4e. A vertical groove 4g having an appropriate length in the axial direction is formed at a required position on the peripheral surface behind the step 4e.
In addition, a circumferential recess 4h that does not reach the entire circumference is formed on the circumferential surface of the critical portion of the cylindrical portion 4a and the shaft portion 4b, and one of the guide grooves 4m and 4n is critical in the criticality of the shaft portion 4b and the shaft portion 4c. A step 4l is formed at the rear end of the side peripheral wall, and a step 4k is formed at the rear end of the other side peripheral wall. The position of the step 4k is appropriately provided in front of the position of the step 41, and the steps of the guide grooves 4m, 4n are provided. The wall surface on the side where the portion 4l is located is the contact portions 4p and 4r with which the flange side surface of the cylindrical cam 5 to be described later contacts.
In addition, a substantially rectangular window portion 4i that penetrates in the axial direction is provided on the peripheral surface of the shaft portion 4c, and an umbrella-shaped locking step having step portions on the front end side on both peripheral surfaces sandwiching the window portion 4i. Part 4j is formed.
Further, as shown in FIG. 12, a circumferential guide ring 21 opened at one place is fitted into the recess 4h by utilizing elastic deformation. The recess 4h has a shape that fits the guide ring 21 so that the inner surface of the guide ring covers the open side of the guide grooves 4m and 4n. The operation related to the above configuration will be described later.

The cylindrical cam 5 is shown in FIGS. As shown in the figure, the cylindrical cam 5 is formed of a cylindrical portion 5e having a slightly smaller diameter through a cylindrical portion 5a at the front and a stepped portion 5i at the rear, and a cam slope 5b that is displaced on the front side of the cylindrical portion 5a. A notch 5c that is provided in a required range in the circumferential direction and that engages with the rear end of the cam-like convex portion of the sliding piece 14 is provided at the frontmost end position of the cam slope 5b.
Further, a flange portion 5h protruding in the inner diameter direction is formed on the inner peripheral surface of the cylindrical portion 5a behind the cam inclined surface 5b, a circumferential step portion 5j is formed at the rear end of the flange portion 5h, and the cylindrical portion 5a. A substantially rectangular window portion 5d in the axial direction is perforated at a required portion of the peripheral surface of the outer peripheral surface, and a circumferential step portion 5k is formed on the inner peripheral portion at the rear end position of the window portion 5d. A window portion 5f having a substantially rectangular shape in the axial direction is formed at a required position on the peripheral surface of the portion 5e, and a seal 17 to be described later is removably attached to a required position on the peripheral surface of the cylindrical portion 5e. A mating protrusion 5g is provided.

  In the guide grooves 4m and 4n of the guide cylinder 4 described above, writing bodies 16 and 16 such as ballpoint pens are arranged with the sliding pieces 14 and 14 attached to the rear ends thereof, respectively, and the front end of the guide groove and the front end side of the sliding piece, Return springs 15 and 15 are laid between them, and the sliding pieces 14 and 14 are urged rearward of the guide cylinder 4 so that the sliding pieces 14 and 14 slide in the axial direction with respect to the guide grooves 4m and 4n. The cylindrical cam 5 is mounted in such a manner that it is freely movably fitted and the cam-like convex portions of the sliding pieces 14 and 14 and the cam inclined surface 5 b are in contact with the peripheral surface portion of the guide tube 4. The step portion 5j of the cylindrical cam 5 is engaged with the portion 4j by utilizing elastic deformation between them, and the cylindrical cam 5 is secured to the guide tube 4 in the rearward direction and is fixed to the flange portion 5h of the cylindrical cam. In the circumferential direction in the angular range in which the side surface contacts the contact portions 4p, 4r of the guide tube 4 Been made freely moving the tip of the ballpoint pen such as cursive 16,16 is retractable from the axis away alternately when rotating the cylindrical cam 5 relative to the guide tube 4. In addition, by fixing the guide ring 21 to the guide cylinder 4 as described above, there is no problem such as the writing body or the return spring 15 coming off the guide groove even if the writing body 16 such as a ballpoint pen is slightly twisted outside. Stable assembly work can be performed.

The rear shaft 1 is shown in FIGS. As shown in the figure, the rear shaft 1 is a cylindrical body having a substantially circular cross-section with a flat upper surface, and is connected to both side surfaces of the slightly thickened portion connecting the circumferential surface and the flat end. A sliding groove 1a along the axial direction is formed, and a recessed portion A1b that is recessed in a substantially rectangular shape in the flat rear portion, and a recessed portion B1c that is also recessed in a substantially rectangular shape at a predetermined distance from the recessed portion Is formed. The sliding groove 1a is provided in a state where both ends are closed in the vicinity of the front and rear ends of the rear shaft 1, and a stopper 1e having a stepped portion on the rear end side and a slope on the front side at a predetermined position in front of the rear end portion 1f. Is formed. In addition, a locking projection 1d that is substantially rectangular in the axial direction and protrudes toward the inner diameter side is formed at a required location near the rear end side of the inner surface.

The slide cap 6 is shown in FIGS.
As shown in the figure, the slide cap 6 is a cylindrical body having a substantially cross-sectional circular shape in which the upper surface of the inner hole is flat, and the outer surface of the flat portion is integrally formed with a clog-like clip mounting base 6b along the flat surface. In addition, shaft support portions 6j and 6k are provided at two positions on both side surfaces of the clog-like portion, holes 6c and 6d are provided through the centers of the respective shaft support portions, and further, clip 22 mounting bases are provided on both side surfaces. An engaging groove 6h is formed that can be fixed by engaging a bent portion provided on the inner surface of the inner surface. Further, a partition plate-like seat 6e is provided at the center of the clog-like clip mounting base 6b, and a surrounding portion 6f is formed so that a substantially circumferential recess is formed at the center of the seat 6e. Is formed. Further, a rib 6g is formed on the inner peripheral surface of the inner hole along the axial direction so as to protrude substantially horizontally toward the inner diameter side.
In addition, a fitting shape 7c formed on the side surface of the lid and a fitting shape 6i that is lightly engaged at important points are formed on the opening side to which the lid 7 is attached, so that the assembly work of the lid 7 can be stably performed. So that it is considered.

Is inserted the front end of the rear axle 1 from the rear end opening of Suraidoki guy flop 6, Suraidoki guy flop of the cylindrical body 6a rib 6g formed on the inner surface of the rear shaft 1 stop per 1e of overcoming elastically sliding It is inserted into the moving groove 1a, and slides at an interval at which the front and rear ends of the rib 6g contact the stopper 1e and the rear end 1f of the sliding groove 1a of the rear shaft.

The lid 7 is shown in FIGS. 21 and 22. The locking lever 11 is shown in FIG.
The winding portion of the torsion spring 8 is placed in the recess 7d of the shaft support portion 7b of the lid 7, the shaft portion at one end of the torsion spring 8 is locked to the lid side, and the shaft portion at the other end is engaged with the seat 6e of the slide cap 6. In a stopped state, the shaft support portion 7b of the lid 7 is placed on the shaft support portion 6j of the slide cap, the cover 7 is fitted into the rear end opening of the slide cap, and passes through the hole 6c of the slide cap and the hole 7a of the lid. A pin 9 is attached, and one end of a coiled spring 13 is installed in a substantially circumferential recess formed in the center of the seat 6e of the slide cap, and the other end is a recess formed on the inner surface of the button 11a. , The shaft support portion 11b of the lock lever 11 is mounted on the shaft support portion 6k of the slide cap, the pin 12 is attached through the hole 6d of the slide cap and the hole 11e of the lock lever 11, and the clip 22 Click on the slide cap. Attached to the outer periphery of the mount 6b, button 11a of the locking lever is provided to protrude from the hole drilled in the top surface of the clip base.
When the locking device 10 presses the locking lever button 11a against the urging force of the spring 13, the convex locking portion 11d provided at the front end of the locking lever arm 11c is attached to the rear shaft 1. When the locking state between the two provided recesses A1b and B1c is released and the button 11a is not pressed, the protruding locking portion 11d is locked with either the recess A1b or the recess B1c. It is a device.

  From the state described in paragraph 11, the cylindrical cam 5 assembled to the guide cylinder 4 is inserted into the inner hole portion of the rear shaft 1, and the locking projection 1 d of the rear shaft is a substantially rectangular window portion of the cylindrical cam 5. 5d is easily and elastically engaged easily and firmly. That is, as shown in FIG. 7, an approach such as a slope is taken into consideration at the engagement start portion of the locking projection 1d.

FIG. 16 shows the middle shaft 2. As shown in the drawing, the central shaft 2 has a convex portion 2a protruding in a circumferential shape on the inner peripheral surface, and further, an axial rib 2b is formed at a required position behind the central portion.
The middle shaft 2 is mounted from the front end of the tube portion 4a of the guide tube 4. The rib 2b is fitted into the longitudinal groove 4g of the guide tube, and the convex portion 2a passes over the locking protrusion 4f of the guide tube by elastic deformation. It is locked between the stepped portion 4e and the locking projection 4f and fixed. Further, the rear end of the middle shaft 2 is in contact with the front end of the rear shaft 1. (In the embodiment, since only the cursive body 16 such as a ballpoint pen is mounted, the action of knocking like a mechanical pencil is unnecessary, and normally the rear end of the middle shaft 2 is in contact with the front end of the rear shaft 1. (It is desirable in the specification.)
As shown in FIG. 1, the front shaft 3 has a grip 20 made of an elastic material such as rubber on the peripheral surface behind the mouth portion 3a, and a screw portion 3b formed on the inner peripheral surface of the rear end. 4d is screwed and joined with the front shaft 3 and the rear end of the grip 20 in contact with the front end of the middle shaft 2.
In this state, the middle shaft 2 is firmly fixed to the guide tube 4 in the axial direction.
The grip 20 is provided with an engaging portion between the peripheral surface of the front shaft 3 and the inner peripheral surface of the grip so that the grip 20 does not shift in the rotational direction and the axial direction. It is also possible to provide it integrally by means of double molding or the like without being mounted on.

Further, the inner peripheral surface of the cylindrical portion provided on the mounting base 18 of the seal stamp 17 is detachably engaged and fixed to the peripheral surface of the cylindrical portion 5e at the rear end of the cylindrical cam 5.
The seal 17 covers the printing body 19 formed of a porous printing material having countless continuous pores such as sponge rubber capable of occluding ink, the side surface of the printing body 19 and the printing surface from the opening at the rear end. A printing body cover 20 that projects 19a and a mounting base 18 that fixes the printing body cover 20 are configured.

Thus, the dual writing instrument with a seal of the present invention shown in FIGS. 1 and 2 is assembled.
In addition, the dual-type writing instrument with a seal of the embodiment has a feature that can be easily assembled by hand without using a tool, and can be rationally assembled partially in combination with mechanical assembly according to production convenience. The assembly procedure is not limited to the above-described procedure, and can be changed.

(Function)
1 and 2 shows the unused state of the seal the lid 7 closes the rear end opening of the Suraidoki guy flop, the lid 7 is Yotsute Suraidoki guy to torsion spring 8 mounted between the Suraidoki guy flop 6 It is biased in a direction to close the rear end of the plug 6. Pressing the button 11a of the locking lever 11 from this state, with respect to the axis 1 the rear of Suraidoki guy flop 6 to release the locking state between the locking portion 11d and the rear shaft 1 recess A1b of the engaging lever 11 When sliding forward, the edge 7 of the printing body cover 20 abuts against and presses the inner surface close to the mounting portion of the lid 7, so that the lid 7 is expanded and the rear end opening of the slide cap 6 is opened. When the print surface 19a of 17 is exposed and the pressing of the button 11a is released, the latching portion 11d is latched with the recess B1c of the rear shaft 1 by the urging force of the spring 13, thereby enabling the marking.
When the button 11a is pressed again from this state and the slide cap 6 is slid backward with respect to the rear shaft 1, the lid 7 closes the rear end of the slide cap by the torsion spring 8, and the printing surface 19a of the seal 17 is closed. To hide. When the pressing of the button 11a is released, the locking portion 11d is locked with the recess A1b of the rear shaft 1, and the lid 7 is locked closed.
The slide cap 6 has a short length relative to the full length of the rear shaft 1, so that the lid can be easily opened and closed even with one-hand operation. In addition, in the embodiment, since the front end is inclined back on the side opposite to the clip side, the operability is further improved.
The Suraidoki He flop 6 is a schematic cross-sectional circular cylindrical body upper surface of the bore becomes flat, and, since the rear axle 1 also top is cylindrical of substantially circular cross-section having the same shape with a flat, Suraidoki guy If the back 6 is attached to the rear shaft 1, it can be integrated in the rotational direction, but it cannot be expected to prevent rattling or smooth sliding. Suraidoki guy flop of the cylindrical body 6a rib 6g formed on the inner surface of the stopper 1e of rear shaft 1 overcame resiliently fitted to the slide grooves 1a, the front and rear ends of the ribs 6g of the rear axle of the slide groove 1a by providing to slide abuts intervals the stopper 1e and the rear end portion 1f, it is possible to expect rattle and smooth sliding, easy installation and prior retracted position Suraidoki guy flop 6 for the rear axle 1 Easy positioning.

Further, in the embodiment, the rear end surface of the locking portion 11d of the locking lever 11 is provided in a hook shape, while the rear end surface of the concave portion B1c of the rear shaft 1 is provided in a similar hook shape. When the opening of the slide cap 6 is opened and printed, the side surface of the slide cap 6 is grasped with a finger. When the printing surface 19a is strongly pressed against a document or the like, There is a possibility that the rear shaft recess B1c may be disengaged, and the rear shafts are provided so as to meet each other in a bowl shape so as not to be inadvertently removed. In addition, there is means for strengthening the locking state by increasing the urging force of the spring 13, but there is a problem such as spring settling. In addition, since the printing surface is crushed when pressed strongly, there is no problem with normal stamping, and this is not a necessary configuration. If the side surface of the slide cap 6 is not gripped with a finger and the rear shaft 1, the extreme middle shaft 2 or the front shaft 3 is gripped by the finger, there is no problem that the locking is inadvertently released. However, there is a problem that it is difficult to stamp at an accurate position.
In the embodiment, the front end surface of the locking portion 11d of the locking lever 11 is provided vertically, while the front end surface of the recess A1b of the rear shaft 1 is provided vertically. It can be said that it is desirable that the lids 7 are arranged in a bowl-like manner so that the lid 7 does not open carelessly.

  Further, when the rear shaft 1 or the slide cap 6 is rotated with respect to the grip 20 or the middle shaft 2, the cylindrical cam 5 is rotated with respect to the guide tube 4, and the cam of the sliding piece 14 loosely fitted in the guide groove is provided. The convex portion comes into contact with the cam inclined surface 5b of the cylindrical cam 5 and moves back and forth, so that the tip end portion of the writing body 16 such as a ballpoint pen is selectively projected and retracted from the tip hole of the tip shaft 3.

(Other embodiments)
In addition, a shear pencil pencil is arranged in at least one of the guide grooves, and a gap for a knock stroke necessary for feeding the core between the rear end of the middle shaft 2 and the front end of the rear shaft 1 is secured. The tip of the shear pencil pencil is projected from the front end hole of the front shaft 3 and the step provided at the rear of the tip is engaged with the inner step of the front end of the front shaft, and the core is placed behind the shear pencil pencil. And a sliding piece 14 attached to the rear end of the core pipe and connected to the rear end of the shear pencil pencil by the axial transition of the rear shaft 1 with respect to the middle shaft 2. The rear end of the convex portion is moved axially at the front end of the cylindrical cam 5 to feed out the core. (Note that the structure and action of the mechanical pencil writing body that grips the core and feeds out the core is well known as a writing body mounted on a compound writing instrument, so the drawings and detailed description are omitted.)
In the above-described embodiment, two types of writing bodies are mounted. However, three types of writing bodies can be mounted.
Further, at the rear end of the middle shaft and the front end of the rear shaft, a concave portion that is displaced in the axial direction is provided on one side, and a convex portion that is displaced in the axial direction is provided on the other side. By attaching the middle shaft to the guide cylinder so that the convex portion faces the rear shaft, the rear shaft can be shifted relative to the central shaft, and by removing the concave portion and the convex portion, the rear shaft It is possible to make the shaft transition impossible, and in that case, the mechanical pencil cursive that requires a knock operation to feed the core by changing the mounting position in the circumferential direction with respect to the guide cylinder with one type of the center shaft It is possible to easily switch the specifications between a dual-type writing instrument that includes a ballpoint pen and a dual-type writing instrument that does not require a knock operation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal cross-sectional view showing in detail the entirety of a composite writing instrument with a seal stamp according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view showing the entirety of a dual writing instrument with a seal that is an embodiment of the present invention. It is a front view of a rear axis. It is sectional drawing of a rear axis. It is a top view of a rear axis. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a top view of the guide cylinder which carried out the partial cross section. It is CC sectional drawing of a guide cylinder. It is a front view of a guide cylinder. It is DD sectional drawing of FIG. It is a guide ring. It is a front view of a cylindrical cam. It is a top view of a cylindrical cam. It is sectional drawing of a cylindrical cam. It is a half sectional view of the middle shaft. It is a front view of a slide cap. It is a top view of a slide cap. It is FF sectional drawing of FIG. It is a side view of a slide cap. It is a side view of a lid. It is a front view of a lid. It is a side view of a locking lever.

Explanation of symbols

1 Rear shaft 1a Sliding groove 1b Recess A
1c Concave B
1d Locking protrusion 1e Stopper 1f Rear end 2 Middle shaft 2a Protruding portion 2b Rib 3 Lead shaft 3a Mouth portion 4 Guide tube 4a Tube portion 4b Shaft portion 4c Shaft portion 4d Screw portion 4e Step portion 4f Locking protrusion 4g Vertical groove 4h recessed portion 4i window portion 4j locking step portion 4k step portion 4l step portion 4m guide groove 4n guide groove 4p contact portion 4r contact portion 5 cylindrical cam 5a tube portion 5b cam inclined surface 5c notch 5d window portion 5e tube portion 5f window portion 5g engagement protrusion 5h flange 5i step 5j step 5k step 6k slide cap 6a cylinder 6b clip mount 6c hole 6d hole 6e seat 6f enclosure 6g rib 6h locking groove 6i fitting shape 6j shaft support 6k Support 7 Lid 7a Hole 7b Shaft support 7c Insertion shape 7d Recess 8 Torsion spring 9 Pin 10 Locking device 11 Locking lever 11a Button
11b Shaft support portion 11c Arm 11d Locking portion 11e Hole 12 Pin 13 Spring 14 Sliding piece 15 Return spring 16 Writing object such as ballpoint pen 17 Seal 18 Mounting base 19 Printing body 19a Printing surface 20 Printing body cover 21 Guide ring

Claims (3)

When the front end of the guide tube is joined to the rear end of the front shaft, the middle shaft is fixed to the guide tube so that the front end abuts the rear end of the front shaft and is fixed to the guide tube. A sliding piece is attached to each guide groove of the guide cylinder provided with a groove at the rear end of a writing instrument such as a ballpoint pen. A return spring is laid between the front of the guide groove and the sliding piece, and the sliding piece is guided. The sliding piece is slidably fitted in the guide groove so as to be freely slidable in the axial direction by urging the cylinder to the rear, and the sliding piece is brought into contact with the sliding piece on the peripheral surface portion of the guide cylinder in the axial direction. A cylindrical cam having a cam slope that is slidable in the axial direction is integrally fixed to the inner surface of the rear shaft. A seal is attached to the rear end of the cylindrical cam and a required angle in the circumferential direction with respect to the guide tube. Written when the rear shaft is rotated with respect to the middle shaft. Tip selectively enabling retractable from the axis destination,
In addition, it is a cylindrical body having a substantially cross-sectional circular shape with a flat upper surface of the rear shaft, and it is along the axial direction on both side surfaces of the slightly thickened portion connecting the circumferential surface and the flat end. the provided slide groove, provided with a rib fitted into the sliding grooves on the inner surface of the slide key guy flop, inclined in length to the entire length of the rear axle is Shi Na and part-length front end on the side opposite to the clip side The retracted slide cap is fitted to the rear shaft so that the rotation in the circumferential direction is integral and slidable in the axial direction, and the slide cap is moved forward in the axial direction of the slide cap relative to the rear shaft at the rear end of the slide cap. By sliding, the inner edge of the seal cover is pressed against the peripheral corner of the seal to open the rear end of the slide cap and slide away from the print cover by sliding the slide cap in the axial rearward direction. Due to the action of a torsion spring provided between the cap and the A lock device for rotatably mounting a lid for closing the rear end port of the dope cap, and sliding the slide cap in the axial direction with respect to the rear shaft so that the slide cap is fixed to the rear shaft at the position where the lid opens and closes, respectively. The locking device is provided between the slide cap and the rear shaft. The locking device comprises at least a locking lever and a rear shaft. When the locking lever button is pressed against the biasing force of the spring, the front end of the arm of the locking lever When the convex locking portion provided on the rear side releases the locking state with any of the two concave portions provided on the rear shaft and the button is not pressed, the convex locking portion has two concave portions. A writing instrument with a seal, which is in a locked state with any of the above . A shear pencil pencil is arranged in at least one of the guide grooves, and the core between the rear end of the middle shaft and the front end of the rear shaft in a state where the tip of the shear pencil pencil protrudes from the shaft tip. The dual-type writing instrument with a seal according to claim 1, wherein a clearance corresponding to a knock stroke required for the cylindrical cam to shift its axis is secured. The rear shaft slide groove is formed with a stopper with a step on the rear end side and a slope on the front side. 3. The composite writing instrument with a seal according to claim 1, wherein the front and rear ends of the ribs are provided so as to slide at intervals contacting the stopper of the sliding groove of the rear shaft and the rear end portion.

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