JP2011167884A - Rotary feed-type writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary feed-type writing utensil which includes a barrel composed of a forward half and a rear half as a rotary manipulator and a writing element housed in the barrel the writing apex of which can be retracted from the apex opening of the barrel by a rotary feed mechanism arranged in the barrel, and furthermore, which can be assembled not in a complicated way by a simple structure and has an outlook perceived as if a decorative metal ring is fitted at the rear end of the forward barrel. <P>SOLUTION: The rotary feed-type writing utensil includes a decorative metal ring 24 with which the rear end of the forward barrel 2a can come into contact, fitted in a way that the decorative metal ring is not budged forward/backward with respect to a connecting cylinder 26 or a sliding case 7. The decorative metal ring 24 has an outside diameter which is smaller than the inside diameter of the forward end 2ba on the side connected with the forward barrel 2a of the rear barrel 2b on the outer circumferential surface of the sliding case 7 which constitutes the rotary feed mechanism. The connecting cylinder 26 is press-inserted into the forward barrel 2a and the rear end of the forward barrel 2a is brought into contact with the decorative metal ring, and thereby, the forward barrel 2a and the rear barrel 2b are connected with each other. In this case, it is necessary that the forward end 24a of the decorative metal ring 24 is exposed outward. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention comprises a shaft cylinder composed of a front shaft and a rear shaft as a rotary operation body, and the writing tip portion of the writing body accommodated in the shaft tube is rotated by rotating the rear shaft relative to the front shaft. The present invention relates to a rotary drawing-type writing instrument that can be projected and retracted from the opening of the tip.

  Conventionally, a shaft cylinder is formed on a front shaft and a rear shaft as a rotary operation body, and an inner cylinder body having an insertion portion for inserting a writing body constituting a rotary feeding mechanism is formed on the rear shaft with respect to the rear shaft. By connecting a connecting cylinder fixed to the inner cylinder in a press-fitted state, the front shaft and the rear shaft are detachably connected to each other so as to be rotatable with respect to each other. There is known a rotary feeding-type writing instrument in which a writing tip portion of a writing body inserted into an inner cylinder by rotating it with respect to a front shaft is projected and retracted from a tip opening portion of the shaft tube.

  In order to appeal the design aesthetics to the viewer, the rotary payout type writing instrument is proposed with a decorative ring attached to the front end portion of the rear shaft as disclosed in JP-A-2002-225484. Although it is also provided as a product, a product with a metal decorative ring (decorated metal ring) attached to the rear end of the front shaft has not been provided.

  The reason for this will be described with reference to FIG. 1 and FIG. 2. The connecting cylinder 26 fixed to the inner cylinder (sliding case) 7 is inserted into the front shaft 2a in a press-fitted state, whereby the front shaft 2a and In the rotary feeding writing instrument having a structure in which the rear shaft 2b is detachably connected to each other so as to be rotatable, the connecting cylinder 26 can be inserted into the inner wall surface of the rear end 2ab of the front shaft 2a in a press-fit state. For example, the connecting cylinder 26 is provided with a press-fitting insertion part 25 that is expanded outward, and abuts against the inner wall surface of the rear end 2ab of the front shaft 2a in a press-contact state. The press contact portions 25a that protrude outward and extend in the axial direction are provided at three opposing positions so that they can be inserted in a press-fitted state. In order to attach the metallic decorative metal ring to the rear end portion of the front shaft, a part of the decorative metal ring is fixed to the inner wall surface or the outer wall surface of the rear end portion of the front shaft by bonding or screwing. For this reason, when trying to insert a connecting cylinder into a fitting with a decorative metal ring attached to the rear end portion of the front shaft, the press contact portion of the press-fit insertion portion is attached to the inner wall surface of the decorative metal ring or the inner wall surface of the rear end portion of the front shaft. Attempting to enter with pressure contact, but the decorative annulus and the rear end of the front shaft are not deformed.If the front shaft is repeatedly attached to and detached from the connection tube, the pressure contact portion is scraped, and the front shaft and the connection tube There arises a problem that the connection in the press-fit state becomes impossible. In order to solve these problems, it is necessary to make the shape and structure of the rear end part of the decorative metal ring or the front shaft so that the press-contact part of the press-fitting insertion part of the connecting cylinder is difficult to be scraped. This is because there is a problem that the assembly becomes complicated and the manufacturing cost is greatly increased.

  As a result of various investigations on the structure and means for inserting a decorative metal ring at the rear end of the front shaft, the present inventor has found that the inner shaft arranged to be rotatable with respect to the rear shaft without being linked to the movement of the rear shaft. By attaching a decorative metal ring in contact with the rear end of the front shaft to the cylinder or connecting cylinder, it was found that the decorative metal ring was mounted on the rear end of the front shaft, and the present invention was achieved. It was.

JP 2002-225484 A

  An object of the present invention is to provide an inner cylinder having an insertion part for forming a shaft cylinder on a front axis and a rear axis as a rotary operation body, and inserting a writing body constituting a rotation feeding mechanism in the rear axis. A connecting cylinder, which is arranged to be rotatable with respect to the rear shaft and is fixed to the inner cylinder, is inserted into the front shaft in a press-fitted state, so that the front shaft and the rear shaft are detachably connected to each other so as to be rotatable. In the rotary feeding type writing instrument in which the writing tip inserted into the inner cylinder by rotating the rear shaft with respect to the front shaft is projected and retracted from the tip opening of the shaft cylinder, it is assembled with a simple structure. The object is to obtain a rotary drawing-type writing instrument that looks as if a decorative metal ring is attached to the rear end of the front shaft.

The present invention
“1. A shaft cylinder is formed on a front shaft and a rear shaft as a rotary operation body, and an inner cylinder body having an insertion portion for inserting a writing body constituting a rotary feeding mechanism is formed on the rear shaft. By connecting a connecting cylinder that is rotatably arranged and fixed to the inner cylinder in a press-fitted state inside the front shaft, the front shaft and the rear shaft are detachably connected to each other so that they can rotate with each other. In the rotary feeding type writing instrument in which the writing tip of the writing body inserted into the inner cylinder by rotating the shaft with respect to the front shaft is projected and retracted from the tip opening of the shaft cylinder, the outer circumference of the connecting cylinder or the inner cylinder A decorative metal ring with an outer diameter smaller than the inner diameter of the front end of the rear shaft connected to the front shaft of the rear shaft on the surface and capable of contacting the rear end of the front shaft is moved back and forth with respect to the connecting cylinder or the inner cylinder. When the connecting cylinder is pressed into the front shaft and the rear end of the front shaft is in contact with the decorative metal ring and the front and rear shafts are connected, Rotating feeding type writing instrument, wherein a front end portion is provided so as to be exposed to the outside both.
2. The rotary feeding-type writing instrument according to claim 1, wherein the decorative metal ring is provided such that a rear end portion thereof is concealed by a rear wheel or a metal ring attached to a front end portion of the rear shaft.
3. 3. The rotary feeding type writing instrument according to claim 1 or 2, wherein a concave insertion portion for inserting a rear end portion of a front shaft is provided at a front end portion of the decorative metal ring.
4). 4. The rotary feeding-type writing instrument according to any one of claims 1 to 3, wherein an outer diameter of the decorative metal ring is substantially the same as an outer diameter of a rear end portion of a front shaft. "
It is.

  In the present invention, the rotation feeding mechanism disposed in the rear shaft has a structure well known in the art and is not special. For example, a rotating cam that is rotatable by rotating a rear shaft is arranged on the outer peripheral surface of an inner cylindrical body, which is also called a sliding case having a cursive body containing a cursive body, and the cursive body A cursive body with a sliding body with a cam locking projection in the housing is urged to the rear side opposite to the end opening of the shaft tube by a spring, and the cam locking projection is formed on the rotating cam. When the rotating cam is in contact with the cam surface having the inclined surface, the sliding member and the writing body move back and forth as the cam locking projection moves along the cam surface. There is a structure that protrudes and retracts from the tip opening of the shaft tube. In the present invention, the inner cylinder constituting the rotation feeding mechanism is the inner cylinder (sliding case). In addition, for example, an accommodation cylinder that accommodates a writing body having a guide groove penetrating inside and outside formed in a substantially V-shaped outer peripheral surface in the shaft cylinder can be rotated with respect to the front axis in conjunction with the rear axis. A writing body in which a member having a locking projection protruding in the axial radial direction at the rear end is mounted in the housing cylinder, and the locking protrusion is inserted into the guide groove and is connected to the tip opening of the shaft cylinder by a spring. The back side of the writing body is moved back and forth as the locking projection moves along the guide groove along with the rotation of the housing cylinder, so that the writing body moves back and forth. There is also a structure that protrudes from the tip opening. The inner cylinder in this case is the above-mentioned storage cylinder.

  In the present invention, the decorative metal ring is disposed on the outer peripheral surface of the connecting cylinder or the inner cylinder, but may be fixed to the connecting cylinder or the inner cylinder, or the decorative metal ring may be rotated with respect to the connecting cylinder or the inner cylinder. Although it may be inserted as possible, it is important that the decorative metal ring is arranged so as not to move back and forth with respect to the connecting cylinder or the inner cylinder. Moreover, in the invention which concerns on Claim 3, although the outer diameter of the said decoration metal ring is formed substantially the same as the outer diameter of the rear-end part of a front shaft, it is substantially the same as the outer-diameter dimension of the rear-end part of a front shaft. That is, the outer diameter dimension of the decorative metal ring may be equal to or slightly different from the outer diameter dimension.

  Since the rotary drawing-type writing instrument of the present invention has the structure as described above, it has a simple structure without being complicated as compared with the conventional structure, and the decorative metal ring is mounted on the front shaft without being complicated as compared with the conventional structure. It looks as if it was attached to the rear edge.

  By making it the invention which concerns on Claim 2, it is between the rear-end part of the decoration metal ring distribute | arranged on the connection cylinder or the inner cylinder outer peripheral surface, and the front-end of the metal ring with which the front end of the rear axis | shaft or the front-end part of the rear axis | shaft was mounted | worn. Since there is no gap, it is possible to improve the aesthetics, and it is difficult to understand that the decorative metal ring is arranged on the outer peripheral surface of the connecting cylinder or the inner cylinder. There is an effect that looks like.

  The invention according to claim 3 has an effect that when the front shaft and the rear shaft are connected, rattling caused by the rear end of the front shaft moving inward can be suppressed.

  With the invention according to claim 4, when the front shaft and the rear shaft are connected, the outer diameter at the front end portion of the rear shaft where the front shaft and the rear shaft are connected does not have to be increased so much. There is an advantage that the overall shaft diameter of the writing instrument can be further reduced.

It is sectional drawing which cut | disconnected the principal part of the rotary drawing-type writing instrument which shows the Example of this invention. FIG. 2 is an enlarged longitudinal sectional view showing a state in which a decorative metal ring is inserted on an outer peripheral surface of a sliding case to which a connecting cylinder in FIG. 1 is fixed.

  In the present invention, a shaft cylinder is formed on a front shaft and a rear shaft as a rotary operation body, and an inner cylinder body having an insertion portion for inserting a writing body constituting a rotation feeding mechanism is disposed in the rear shaft. By connecting a connecting cylinder fixed to the inner cylinder in a press-fitted state to the inside of the front shaft in a press-fitted state, the front shaft and the rear shaft are detachably connected to each other so as to be rotatable. In a rotary feeding type writing instrument in which the writing tip inserted into the inner cylinder by rotating the rear shaft with respect to the front shaft is projected and retracted from the tip opening of the shaft tube, the rear end of the front shaft is decorated. Instead of attaching a metal ring, a decorative metal ring is attached to the connecting cylinder or the inner cylinder.

  Embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the rotary drawing type writing instrument will be described as a rotary drawing type composite writing instrument in which a writing instrument of a mechanical pencil unit and a writing pen of a ballpoint pen refill are accommodated in a shaft cylinder, but the invention is not limited to this. It may be a rotary feeding type writing instrument in which two writing bodies are accommodated in a shaft cylinder.

  The rotary feeding type writing instrument 1 of the present embodiment accommodates two ball pen refill writing bodies 3 (only one is shown in FIG. 1) and one mechanical pencil unit writing body 4 in the shaft cylinder 2. Of the structure. The shaft cylinder 2 is made of metal, and has a tapered base part that is screwed and bonded to the front shaft 2a, the rear shaft 2b as a rotating operation body, and the front end (left side in FIG. 1) of the front shaft 2a. And 5.

  The rotation feeding mechanism in the present embodiment has a well-known structure, and is 120 ° in the circumferential direction (not shown) as an inner cylindrical body constituting the rotation feeding mechanism inside the shaft tube 2. A sliding case 7 having three writing body receiving grooves 6 for each and a cam surface (not shown) extending in the axial direction are arranged on the outer peripheral surface of the sliding case 7 so as to be rotatable. It consists of a rotating cam cylinder 8, and two ball pen refill writing bodies 3 and one mechanical pencil unit writing body 4 are interposed in a curving body receiving groove 6 of the sliding case 7 with a coil spring 9 interposed therebetween. Each cam locking projection is accommodated by being urged and housed rearward (to the right in FIG. 1) and mounted with a sliding body 11 having a cam locking projection 10 at the rear end of each writing body 3, 4. No. 10 is brought into contact with the cam surface of the rotary cam cylinder 8 in a backward pressing state. It is those of the structure.

  In the front end 2ba of the rear shaft 2b of the rotary feeding type writing instrument 1 in the present embodiment, a ring-shaped decorative portion 12a exposed outward at the front end of the rear shaft 2b, and a press-fit portion 12b press-fitted into the rear shaft 2b. A press ring 12b is press-fitted into the front end 2ba of the rear shaft 2b and attached thereto.

  In the present embodiment, the engagement convex portion 13 formed by indenting the peripheral side wall surface of the rear shaft 2b and projecting inwardly extends in the axial direction formed on the outer surface of the rotating cam cylinder 8. The front end 8a of the rotating cam cylinder 8 is bonded to the inner wall surface of the press-fitting part 12b of the metal ring 12 so that the rotating cam cylinder 8 can rotate in conjunction with the rear shaft 2b. It is fixed in the shaft 2b.

  As shown in FIG. 2, the sliding case 7 includes a cylindrical front cylinder portion 15, an accommodation portion 16 having a cursive body accommodation groove 6, and an outer diameter of the accommodation portion 16. The locking portion 17 is provided with a locking projection 18 protruding outward, and the rotating cam cylinder 8 is also formed on the inner wall surface in the same manner as a conventional rotating cam cylinder. Can be locked with three protruding ridges 19 provided in every 120 ° in the circumferential direction and extending in the axial direction and the locking protrusions 18 formed at the tip of the protruding ridge 19. A locked projection 21 composed of a locking claw 20 is provided, and the locking projection 18 of the sliding case 7 is brought into contact with the locking claw 20 of the locked projection 21. Thus, the sliding case 7 is moved forward relative to the rotating cam cylinder 8 so as not to be detached from the rotating cam cylinder 8.

  The sliding case 7 is provided with a step portion 22 in which the outer diameter of the front cylindrical portion 15 is slightly smaller than the outer diameter of the accommodating portion 16. In order to insert the rear end portion 2ab of the front shaft 2a on the outer peripheral surface of the front cylindrical portion 15 of the sliding case 7 with an outer diameter smaller than the inner diameter of the metal ring 12 at the front end portion (left side direction in FIG. 2). The decorative metal ring 24 having the insertion portion 23 is rotatably inserted with the rear end in contact with the step portion 22. The insertion portion 23 is formed so that the outer diameter of the decorative metal ring 24 and the outer diameter of the rear end portion 2ab of the front shaft 2a are the same when the rear end portion 2ab of the front shaft 2a is inserted.

  On the outer peripheral surface of the front cylinder portion 15 of the sliding case 7 in front of the decorative metal ring 24 (left side in FIG. 2), a connecting cylinder 26 having a press-fitting insertion portion 25 that spreads outward at the tip portion. The rear end is in contact with the front end surface of the decorative metal ring 24 and is fixed by caulking to the outer peripheral wall surface of the front cylindrical portion 15. On the outer peripheral surface of the press-fit insertion portion 25, there are provided three pressure contact portions 25a that protrude outward and abut axially in contact with the inner wall surface of the rear end 2ab of the front shaft 2a. Yes, when the press-fit insertion part 25 is inserted into the rear end 2ab of the front shaft 2a, the press-contact part 25a can be brought into contact with the rear end 2ab of the front shaft 2a in a press-fit state.

  The decorative metal ring 24 is sandwiched between the step portion 22 of the sliding case 7 and the rear end of the connecting cylinder 26, and does not move back and forth even if it can rotate with respect to the sliding case 7. The decorative metal ring 24 is dimensioned so that the insertion part 23 is positioned in front of the front end of the metal ring 12 and the rear end part 24 b is covered with the metal ring 12.

  The front shaft 2a and the rear shaft 2b are configured to insert the press-fit insertion portion 25 of the connecting cylinder 26 into the rear end portion 2ab of the front shaft 2a, and press the pressure contact portion 25a to the inner wall surface of the rear end portion 2ab of the front shaft 2a. The rear end of the front shaft 2 a is detachably connected by inserting it into the insertion portion 23 of the decorative metal ring 24. At this time, the insertion portion 23 of the decorative metal ring 24, that is, the rear end of the front shaft 2 is positioned forward of the front end of the metal ring 12, and the rear end portion 24 b of the decorative metal ring 24 is covered with the metal ring 12. It looks as if it is attached to the rear end 2ab of the front shaft 2a.

  In the feeding mechanism of the present embodiment, when the rear shaft 2b is rotated with respect to the front shaft 2a, the rotating cam cylinder 8 is also rotated in conjunction with the rear shaft 2b, and is in contact with the cam surface of the rotating cam cylinder 8. The cam locking projections 10 provided on the sliding bodies 11 of the writing bodies 3 and 4 are moved along the cam surface, and the sliding bodies 11 and the writing bodies 3 and 4 are moved back and forth in the shaft cylinder 2 sequentially. As shown in FIG. 1, for example, as shown in FIG. 1, the writing tip portion 28 of the ball-point refill writing body 3 or the sharpening of the cam locking protrusion 10 of each sliding body 11 is locked in a concave groove 27 provided at the tip of the cam surface. The state where the writing tip portion 29 of the writing unit 4 of the pencil unit protrudes from the tip opening portion 30 of the shaft tube 2 (base portion 5) is maintained. In the writing body 4 of the mechanical pencil unit, it is necessary to press the rear shaft 2b against the front shaft 2a in order to feed out the lead core 31 from the writing front end portion 29. At this time, the decorative metal ring 24 is connected to the rear shaft 2b. Since it does not move forward relative to the front shaft 2a, the decorative metal ring 24 appears as if it is mounted on the rear end 2ab of the front shaft 2a.

  In this embodiment, similarly to the conventional rotary feeding type writing instrument, an eraser cradle 34 is screwed and bonded to the rotary cam cylinder 8 at the rear end of the rear shaft 2b with a clip 32 and a metal ring 33 interposed therebetween. An eraser 35 is inserted into the eraser cradle 34, and a crown 36 is detachably screwed to the eraser cradle 33 at the rear end of the rear shaft 2b.

  A shaft cylinder is formed on a front shaft and a rear shaft as a rotary operation body, and an inner cylinder body having an insertion portion for inserting a writing body constituting a rotation feeding mechanism is rotated with respect to the rear shaft in the rear shaft. By connecting a connecting cylinder fixedly attached to the inner cylinder in a press-fitted state inside the front shaft, the front shaft and the rear shaft are connected detachably and rotatably to each other, and the rear shaft is connected to the front shaft. In a rotary feeding type writing instrument in which the writing tip of the writing body inserted into the inner cylinder by rotating with respect to the shaft is projected and retracted from the tip opening of the shaft, apart from the metal ring fixed to the front end of the rear shaft It can be used when it is desired to provide a decorative metal ring exposed to the outside between the front shaft and the rear shaft.

DESCRIPTION OF SYMBOLS 1 Rotation | feed-out type writing instrument 2 Shaft cylinder 2a Front shaft 2b Rear shaft 3, 4 Writing body 7 Sliding case 23 Insertion part 24 Decoration metal ring 26 Connecting cylinder 28, 29 Writing tip part 30 Tip opening part

Claims (4)

  A shaft cylinder is formed on a front shaft and a rear shaft as a rotary operation body, and an inner cylinder body having an insertion portion for inserting a writing body constituting a rotation feeding mechanism is rotated with respect to the rear shaft in the rear shaft. By connecting a connecting cylinder fixedly attached to the inner cylinder in a press-fitted state inside the front shaft, the front shaft and the rear shaft are connected detachably and rotatably to each other, and the rear shaft is connected to the front shaft. In a rotary feeding type writing instrument in which a writing tip portion of a writing body inserted into an inner cylinder by rotating relative to a shaft is projected and retracted from a tip opening portion of the shaft tube, on the outer peripheral surface of the connecting cylinder or the inner cylinder The decorative metal ring that can contact the rear end of the front shaft with an outer diameter smaller than the inner diameter of the front end portion of the rear shaft connected to the front shaft is prevented from moving back and forth with respect to the connecting cylinder or the inner cylindrical body. When the connecting cylinder is press-fitted into the front shaft and the rear end of the front shaft is brought into contact with the decorative metal ring and the front shaft and the rear shaft are connected, at least the decorative metal ring Rotating feeding type writing instrument, wherein the end portion is provided so as to be exposed to the outside.   The rotary drawing-type writing instrument according to claim 1, wherein the decorative metal ring is provided such that a rear end portion thereof is concealed by a rear wheel or a metal ring attached to a front end portion of the rear shaft.   The rotary feeding type writing instrument according to claim 1 or 2, wherein a concave insertion portion for inserting a rear end portion of a front shaft is provided at a front end portion of the decorative metal ring.   The rotary feeding type writing instrument according to any one of claims 1 to 3, wherein an outer diameter of the decorative metal ring is substantially the same as an outer diameter of a rear end portion of a front shaft.

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