JP4973693B2 - Intrusive writing instrument - Google Patents

Description

  The present invention relates to a writing instrument having a writing body that can move back and forth in a shaft cylinder, and a seal lid that seals the writing core of the writing body from outside air in conjunction with the back and forth movement of the writing body.

A writing instrument in which water-based ink or oil-based ink is stored has a cap detachably attached to prevent drying of the writing core and evaporation of the ink from the writing core. Of course, it is a cap for covering the writing core and sealing it.
However, in recent years, taking into account the troublesome operation of attaching and detaching the cap, loss of the cap, and the like, the cursive body is disposed so as to be able to appear in and out of the shaft cylinder, and the seal lid that functions as the cap is provided with the cursive body. In / out type writing instruments that open and close in conjunction with the in / out operation of the in / out are becoming commercially available.

  This will be specifically described below. The front end of the shaft cylinder is formed with an opening through which the writing core protrudes and retracts, and the rear of the opening and inside the shaft cylinder can be opened and closed to cover the writing core. A lip is placed. The lip restricts and closes the front end portion of the elastic cylinder, and a slit is formed on the front end surface of the closed portion. This slit is expanded by the writing core, and the writing core protrudes. When the writing core is immersed, the slit of the lip is closed by its own restoring force, and the writing core is again covered and sealed from the outside air to be sealed.

JP2004-314513

However, in the prior art described above, the slit of the lip is widened by the writing core that is most important for writing. That is, every time the writing core is moved in and out, sliding friction is generated between the writing core and the lip. This sliding friction causes sliding scratches and shape changes in the slit of the lip, resulting in poor sealing of the slit. In addition, the above-mentioned sliding friction has worn or deformed the writing core, which has been a cause of blurring during writing.
Further, when the writing core passes through the slit of the lip, the ink of the writing core adheres to the slit, and this also makes the sealing property of the slit poor. That is, the ink adhering to the slit dries and becomes granular and deteriorates the sealing performance.
Furthermore, there has been an attempt to form a bulge in the outer peripheral portion of the front end of the extension, and to expand the slit of the lip by the bulge, but sliding friction occurs between the extension and the slit, resulting in poor sealing. It was a cause of waking up.

That is, the present invention is a writing instrument having a sealable lid that seals the writing core of the writing body from outside air, the writing body capable of moving back and forth in the axial cylinder, and having a clip outside the axial cylinder. The seal lid can be rotated by a projection interlocking with the back-and-forth movement, and the projection is provided in the region of the outer peripheral surface of the cover ring provided in front of the writing body, and the projection is in the longitudinal direction of the writing body. The gist of the pen-shaped writing instrument provided on the clip side with respect to the virtual surface portion including the central axis in FIG.

The present invention is a writing instrument having a sealable lid that seals the writing core of the writing body from outside air, the writing body capable of moving back and forth in the shaft cylinder, and having a clip outside the shaft cylinder. The seal lid can be rotated by a projection interlocking with the operation, and the projection is provided in the area of the outer peripheral surface of the cover ring provided in front of the cursive body, and the projection is the center in the longitudinal direction of the cursive body Since it is provided on the clip side with respect to the virtual surface portion including the axis, when the writing tool is inclined and written, the projection does not contact the writing surface, and stable writing can be obtained.

It is a disassembled perspective view which shows an example of this invention. (A) It is a longitudinal cross-sectional view of a 2nd O-ring. (B) It is a perspective view of a 2nd O-ring. (A) It is a side view of a retainer. (B) It is a top view of a retainer. (C) It is a perspective view of a retainer. (A) It is a side view of a seal lid. (B) It is a front view of a seal lid. (C) It is a perspective view of a seal lid. (A) It is a longitudinal cross-sectional view of a 1st O-ring. (B) A perspective view of the first O-ring. (A) It is a front view of a front shaft. (B) It is a side view of a front shaft. It is a principal part enlarged view of FIG.6 (b). (A) It is a front view of a shaft cylinder. (B) It is a longitudinal cross-sectional view of a shaft cylinder. (A) It is a reverse view of a clip. (B) A perspective view of the clip. (A) It is a front view of a gear. (B) It is a left view of a gear. (C) It is a right view of a gear. It is a longitudinal cross-sectional view of this invention. (A) It is principal part sectional drawing which shows operation | movement (at the time of immersion). (B) It is principal part sectional drawing which shows operation | movement (at the time of 45 degree | times rotation of a seal lid). (C) It is principal part sectional drawing which shows operation | movement (at the time of 90 degree | times rotation of a seal lid). (A) It is principal part sectional drawing explaining operation | movement of a gear (at the time of cursive immersion). (B) It is principal part sectional drawing explaining operation | movement of a gear (at the time of cursive knock). (C) It is principal part sectional drawing explaining operation | movement of a gear (at the time of cursive protrusion).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In all the drawings, the same or similar parts are described with the same or similar reference numerals for convenience.

The writing instrument according to Embodiment 1 of the present invention will be exemplarily described with reference to FIGS. The writing instrument is a shaft case 1 which is either a single case or a case form consisting of a plurality of parts, and a sealing device 3 for sealing the writing core 2 from the outside air is provided inside the shaft case 1. I have. The side of the barrel 1 from which the writing core 2 protrudes is referred to as the front, and the side of the knock body 6 is referred to as the rear .
On the back inner surface of the sealing device 3, a writing body 4 made of a resin material and containing ink containing water or ethanol is disposed. The writing body 4 is composed of a front shaft 5 and a knock body 6 that is detachably screwed to and fixed to the front shaft 5. 2 is installed.
A spring 8 that urges the writing body 4 toward the rear is provided on the guide step 9 of the thin shaft portion 7, and one end of the spring 8 is elastically supported on the step side surface 10 of the thin shaft portion 7. The other end is a part of the sealing device 3 and is elastically supported by one end surface of the second O-ring 10a circumscribed by the thin shaft portion 7 of the front shaft 5.
As will be described later, the schematic configuration of the sealing device 3 includes a shaft cylinder 1, a second O-ring 10 a provided in the shaft cylinder 1, a retainer 11, a seal lid 12, and a first O-ring 13. . These components have respective shapes and provide predetermined functions.
A guide slit 14 is provided on the rear outer peripheral surface of the shaft tube 1, and the guide slit 14 extends through the wall of the shaft tube 1 in the axial direction. A plurality of fixing holes 15 are opened on both sides of the guide slit 14. Clips 16 having protrusions provided with hooks are attached to the plurality of fixing holes 15. The clip 16 is attached to the shaft cylinder 1 so that one end is fixed, and a convex portion 17 is formed on the other end not fixed to the shaft cylinder 1, so that a thin object such as paper can be used. 1 can be inserted. A gear 18 is inserted inside the convex portion 17 formed on the clip 16 so as to be rotatable in the axial direction.

The sealing device 3 will be described with reference to FIGS.
As described above, the spring 8 provided on the thin shaft portion 7 of the front shaft 5 is elastically supported while one end is guided by the guide step portion 9 of the step side surface 10 of the thin shaft portion 7, and the other end is supported by the front shaft 5. The second O-ring 10a circumscribed by the thin shaft portion 7 is elastically supported by one end face. The second O-ring 10a has a convex projection 19 formed in the circumferential direction so that the thin shaft portion 7 is circumscribed. In this example, silicone oil is interposed in the gap between the protrusions, and the three protrusions 19 are provided so that the silicone oil is not peeled off by the sliding of the writing body 4. A plurality may be formed.
The thin shaft portion 7 is formed in front of the sliding tube portion 20 and the sliding tube portion 20 from the rear to the front, and is formed in front of the tapered tube portion 21 and the tapered tube portion 21 that increases in diameter toward the front. The tip cylinder part 22 is formed and has a larger diameter than the sliding cylinder part 20. Then, a cover ring 22a having an outer diameter smaller than that of the front end cylinder part 22 but a larger inner diameter is formed at the front end of the front end cylinder part 22. The cover ring 22a is not formed over the entire circumference, but a notch 22b is formed in one part. Air is replaced by the notch 22b. That is, ink is consumed with writing, and the inside of the writing body 4 is depressurized. However, air enters the writing body 4 from the notch 22b, thereby eliminating the above depressurization and obtaining good writing. It is.
In addition, a projection 37 is formed in the vicinity of the notch 22b and on the surface of the cover ring 22a so as to face the projection. The projection 37 is formed so as to span the cover ring 22a and the distal end cylindrical portion 22. ing. The cross-sectional shape of the protrusion 37 has a substantially circular shape, but a part thereof is notched (notched portion 37a). This is a notch for easily opening and closing a seal lid 12 to be described later.
Further, a step portion is formed by forming a small-diameter portion behind the inner surface of the cover ring 22a, and the step portion formed in the intermediate portion of the writing core 2 is locked to the step portion. The contact between the stepped portion of the cover ring 22a and the writing core 2 prevents the writing core 2 from being immersed in the writing body 4.
The cover ring 22a functions to reinforce the protrusion 37, and also reinforces the intermediate portion of the pen tip 2.

The thin shaft portion 7 slides with the protrusion 19 of the second O-ring 10 a when the writing body 4 moves back and forth, and the second O-ring 10 a is in a state where the writing core 2 is housed in the shaft tube 1. However, the taper surface 21 causes the protrusions 19 of the second O-ring 10a to be in closer contact with each other. A semicircular protrusion 23 is formed in the circumferential direction on the outer peripheral surface of the second O-ring 10a, and is in close contact with the tapered surface 24 formed on the inner surface of the shaft tube 1.
A retainer 11 is disposed in front of the second O-ring 10 a, and the retainer 11 is installed in a state where one end of the second O-ring 10 a is inserted into the retainer 11. A pair of rotation support shafts 26 is formed at the front end of the retainer 11, and a hinge hole 27 is formed in each rotation support shaft 26. A hinge shaft 28 formed in the hemispherical seal lid 12 is rotatably disposed in the hinge hole 27. A wall portion 29 for preventing the retainer 11 from moving forward is formed on the inner surface of the shaft cylinder 1 so that the hinge shaft 28 pivotally supported in the hinge hole 27 of the rotation support shaft 26 of the retainer 11 is sandwiched. ing.
A first O-ring 13 is disposed on the inner surface of the tip opening 30 of the shaft tube 1. Convex protrusions 32 are circumferentially formed on the step side surface 31 of the first O-ring 13 and are in close contact with the step 33 provided on the inner surface of the tip opening 30 of the shaft tube 1. The elastic force of the spring 8 transmitted from the retainer 11 via the second O-ring 10 presses the seal lid 12 forward to the inner R portion 34 of the rear end face of the first O-ring 13, and the ball of the seal lid 12 Abutting the surface 35. When the first O-ring 13 is sandwiched between the seal lid 12 and the shaft tube 1 by this elastic force, the first O-ring 13 is elastically deformed, and the tip opening 30 of the shaft tube 1 is sealed. A sealed chamber 36 is formed by the first O-ring 13 and the second O-ring 10.

Here, when the knock body 6 is pressed, the writing body 4 moves forward against the elastic force of the spring 8 and the writing core 2 protrudes from the tip opening 30. At this time, the thin shaft portion of the front shaft 5 7 is in contact with the rotating grooves 38 formed on both side surfaces of the seal lid 12. When the writing body 4 further advances, the seal lid 12 rotates around the hinge shaft 28 disposed in the hinge hole 27 of the retainer 11. Since the rotation groove 38 has a sufficiently large groove shape as compared with the parallel protrusion 37 of the front shaft 5, the protrusion 37 rotates while the seal lid 12 rotates by the advancement of the protrusion 37. It is possible to move forward without interference in 38. When the seal lid 12 is rotated by 90 °, the protrusion 37 is detached from the rotation groove 38 and moves toward the tip opening 30 of the shaft tube 1. Since the ball-shaped surface 35 of the seal lid 12 is coated with silicone, it can smoothly rotate with the R portion 34 of the first O-ring 13.
A sufficient gap is provided between the seal lid 12 and the writing core 2, and since the sealing lid 12 has already been opened when the writing core 2 reaches the vicinity of the axial tube tip opening 30 by parallel movement, the writing core And the sealing lid will not touch.

At the time of writing, when writing with the clip 16 on the upper side with respect to the writing surface, it does not interfere with the hand of the clip 16, so almost all users are expected to use the clip 16 with the upper side. When the writing body moves back and forth, the protrusion 37 formed at the tip of the thin shaft portion 7 of the front shaft 5 needs to be shifted up and down from the center of rotation of the hinge shaft 28 provided on the seal lid 12 in order to rotate the seal lid 12. However, in consideration of the convenience of writing, when the clip 16 is faced up and viewed from the tip opening 30 of the shaft tube 1, the seal lid 12 is opened and closed with respect to the clip 16 up and down. The projection 37 of the front shaft 5 is preferably positioned above the axis, that is, on the clip 16 side, from the virtual surface portion including the central axis in the longitudinal direction of the cursive body. By positioning the protrusion 37 on the clip 16 side, the protrusion 37 does not come into contact with the writing surface when the writing tool is inclined and written. In this example, in order to fit the projection 37 provided on the thin shaft portion 7 of the front shaft 5 within the circumscribed circle of the thin shaft portion 7, the cross section of the thin shaft portion 7 is designed to have an irregular shape with a plurality of arcs. However, the cross section of the thin shaft portion 7 may be circular.
Further, the first O-ring 13 and the second O-ring 10a are made of a material having low gas permeability. Specifically, the water vapor transmission rate defined in ASTMF 1249 is 3.0 g. mm / m2. day. at 37.8 ° C. consists (90% RH) or less of the material, and, if the material made of a rubber material or an elastic resin material compression set is 20% or less is not particularly limited, for example, these requirements ethylene propylene rubber that satisfies (EPDM), a butyl rubber (IIR), a silicone rubber (Q), a chloroprene rubber (CR), a acrylonitrile-butadiene rubber (NBR), urethane rubber (U), fluororubber (FKM), chlorosulfonated basket Examples include polyethylene rubber (CSM), epichlorohydrin rubber, polysulfide rubber, olefin thermoplastic elastomer, styrene thermoplastic elastomer, blends of the above rubbers, blends of the above rubbers and resin materials, etc. More preferably, E satisfies the requirements for the water vapor transmission rate and compression set rate. PDM, IIR, CR, FKM, olefin thermoplastic elastomer, and styrene thermoplastic elastomer are desirable.
In order to operate smoothly, a lubricant is applied to the sliding cylindrical portion 20 of the thin shaft portion 7, the ball-shaped surface 35 of the seal lid 12, and the hinge shaft 28, but they are kneaded into the resin simultaneously with molding. May be. Examples of the lubricant include silicone oil, wax, talc, and grease, which are preferable, but liquid materials such as silicone oil are preferable in view of application workability.

  On the rear side surface of the shaft cylinder 1, a locking projection 39 and a rotation projection 40 formed on the rear outer peripheral surface of the front shaft 5 are formed. The locking protrusions 39 and the rotation protrusions 40 are fitted in guide slits 14 that are slidable in the axial direction. The guide slit 14 extends in the axial direction through the rear wall of the shaft cylinder 1, and the guide slit 14 has a locking portion 41 a when the writing body 4 is stored in the shaft cylinder 1. A pair of walls 41 having a reduced slit width is formed in a direction approaching from both sides of the guide slit 14. When the rear end surface 40a of the rotation projection 40 is in contact with the locking portion 41a, the writing body 4 is restrained from being detached from the shaft tube 1. Further, an inclined surface 42 is formed on the surface of the wall 41 on the rear side of the shaft cylinder 1 so that the locking projection 39 of the front shaft 5 and the rotation projection 40 can be easily inserted into the guide slit 14.

The shaft tube 1 is formed with fixing holes 15 for fixing the clip 16 on both sides of the guide slit 14. The clip 16 has a fixing protrusion 43 and a protrusion 44 for preventing the writing body 4 from being detached. Is formed. In this example, six fixing projections 43 or three fixing holes 15 for fixing the shaft cylinder and the clip 16 are formed on both sides of the guide slit 14 in total. If there is no problem, the number does not matter.
The fixing protrusions 43 are formed in a line in the axial direction with three each on the left and right sides, but no hook is formed on the central protrusion 43a and has a cross section of the same shape as the fixing hole 15 of the shaft tube 1. Yes. However, the protrusions 43b on both sides are formed with hooks 43c from the side surface of the clip 16 to the outside, and have a cross-sectional shape with a gap on the back side of the hook with respect to the fixing hole 15 of the shaft tube 1. That is, when the fixing protrusion 43 of the clip 16 is inserted into the fixing hole 15 of the shaft cylinder, the deformation of the shaft cylinder 1 is regulated by the projection 43a at the center of the fixing projection 43 of the clip 16, and by this regulation, the hook The fixing protrusion 43b formed with 43c is fitted into the fixing hole 15 of the shaft tube 1 while being bent inward. When the clip 16 is fitted, the shaft cylinder 1 and the clip 16 are fixed by the hook 43c of the fixing protrusion 43, and the deformation of the shaft cylinder 1 is prevented by the central fixing protrusion 43a and the protrusion 44 for preventing attachment / detachment. Is done.

At the front portion of the guide slit 14 of the shaft cylinder 1, there are a cam portion 45 of the gear 18 disposed in the convex portion 17 of the clip 16, a locking projection 39 of the front shaft 5, and a rotation projection 40. In order to match the height, the convex portion 17 in front of the clip 16 is formed so as to fit in the shape of the convex portion 17 of the clip 16 so as to be accommodated in the shaft tube 1. Needless to say, the tip portion 46 of the clip 16 has an inclined surface, and the D-cut portion 47 of the shaft tube 1 is formed in accordance with the shape of the convex portion 17, so that a thin object such as paper can be easily sandwiched. It also serves as a knock prevention mechanism.
The gear 18 includes a cam portion 45 and a rotating shaft portion 48, and the rotating shaft portion 48 is formed so as to protrude from both sides of the cam portion 45. Further, one of the rotating shaft portions 48 is inserted into a shaft groove 49 provided in the convex portion 17 of the clip 16, and the other is fitted into the shaft holding groove 50. Further, the gear 18 is rotatably arranged in the convex portion 17 of the clip 16, and the rotation of the gear 18 is restricted by both walls of the convex portion 17, and this restriction does not lock the writing state even if the knocking operation is performed. Such a problem disappears.

FIG. 11 to FIG. 13 show and explain the knocking operation and the engagement action between the clip and the shaft tube in the projecting operation. In the process of the knocking operation of the knock body 6, the rear portion of the shaft cylinder will be described. A locking protrusion 39 formed on the rear side surface of the front shaft 5 abuts on a rotation inclined surface 45 a formed on the cam portion 45 of the gear 18 inserted in the convex portion 17 of the clip 16. Since the gear 18 is inserted so as to be rotatable in the axial direction, the rotation operation to the gear 18 is performed until the locking projection 39 of the front shaft 5 moves forward and disengages from the rotation inclined portion 45a. When the locking protrusion 39 is disengaged from the rotation inclined portion 45a, it passes over the first peak portion 45b and passes through the cam portion 45. At this time, the rotation protrusion 40 formed behind the locking protrusion 39 does not come into contact with the gear 18 by the escape portion 45c.
The writing body 4 can be pressed until the locking projection 39 comes into contact with the outermost end surface 14a of the guide slit 14 formed in the shaft tube 1, but after the locking projection 39 passes through the cam portion 45, When the pressing of the knock body 6 is stopped while the projection 39 hits the outermost end surface 14a of the guide slit 14, the writing body 4 is retracted, and the locking projection 39 is engaged with the locking groove 45d of the cam portion 45, so that the writing is possible. Become.
Further, when the locking projection 39 is related to the locking groove 45d, the rear end of the locking projection 39 hits the slope provided in the locking groove 45d, and the gear 18 is rotated in the reverse direction.

Next, the operation when storing (immersing) will be described. When the knock body 6 is pressed from the writable state, the writing body 4 moves forward, and the locking protrusion 39 and the rotation protrusion 40 also move forward. At this time, the locking protrusion 39 engages with the gear 18. The rotation projection 40 comes off from the groove 45d, and the rotation projection 40 hits the reverse rotation inclined surface 45e of the gear 18 to reversely rotate the gear 18.
Thereafter, in the operation of stopping the pressing and retracting the writing body 4, the locking projection 39 passes through the cam portion 45 reversely rotated by the reverse inclined surface 45e while passing over the second peak portion 45f, and the writing core 2 is pivoted. It is guided into the cylinder 1.
In the front inside of the barrel 1, when the writing body 4 is retracted, the rear portion of the projection 37 placed on the front outer peripheral surface of the thin shaft portion 7 of the front shaft 5 comes into contact with the rotation groove 38 of the seal lid 12. Further, when the protrusion 37 moves backward, the seal lid 12 rotates in the reverse direction about the hinge shaft 28. As in the forward movement, the rotation groove 38 has a groove shape that is sufficiently larger than the protrusion 37 of the front shaft 5, so that the protrusion 37 retracts without interference in the rotation groove 38 of the seal lid 12. be able to. The hinge shaft 28 of the seal lid 12 is formed with a D-cut plane 28a to prevent reverse rotation. When the writing core 2 is stored and the seal lid 12 seals the shaft tube tip opening 30, the D-cut flat surface 28 a comes into surface contact with a wall surface 29 a provided in the shaft tube 1. The hinge shaft 28 rotates, and an R surface 28b is formed at a portion in contact with the wall surface 29a, so that the seal lid 12 can be rotated without difficulty. Further, protrusions 12 a are provided on both side surfaces of the seal lid 12, and the reverse rotation of the seal lid 12 is prevented by the front end surface 26 a of the rotation support shaft 26 of the retainer 11.

1 shaft cylinder 2 front writing core 3 sealing device 4 writing body 5 front shaft 6 knock body 7 thin shaft portion 8 spring 9 guide step portion 10 step side surface 10a second O ring 11 retainer 12 seal lid 12a protrusion 13 first O ring 14 guide slit 14a outermost surface 15 fixing hole 16 clip 17 convex portion 18 gear 19 projection 20 sliding tube portion 21 taper tube portion 22 tip tube portion 22a cover ring 22b notch portion 23 semicircular protrusion 24 taper surface 25 second O-ring 10a End face 26 Rotating support shaft 26a Front end face 27 Hinge hole 28 Hinge shaft 28aD Cut plane 28b R face 29 Wall 29a Wall 30 Tip opening 31 Step side face 32 Convex protrusion 33 Step 34R part 35 Ball-shaped surface 36 Sealing Chamber 37 projection 37a notch 38 rotation groove 39 locking projection 40 rotation projection 40a rear end surface 41 wall 41a locking portion 42 inclined surface 43 fixed projection 4 a projection 43b on both sides 43c hook 44 projection 45 cam part 45a rotation slope 45b first peak 45c relief 45d locking groove 45e reverse rotation slope 45f second peak 46 tip 47D cut part 48 rotation Shaft 49 shaft groove 50 shaft holding groove

Claims (1)

A writing instrument that can move back and forth in a shaft cylinder, a writing instrument that has a clip outside the shaft cylinder and has a sealing lid that seals the writing core of the writing body from the outside air, and is linked to the back-and-forth movement of the writing body. The seal lid is rotatable by a projection , and the projection is provided in an area of the outer peripheral surface of the cover ring provided in front of the cursive body, and the projection includes a virtual axis including a central axis in the longitudinal direction of the cursive body An in / out type writing instrument provided on the clip side of the surface.