JP2008207501A - Decorative structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a barrel of a writing utensil in which a recessed diameter reduced portion having the outer diameter reduced is provided in a part of the barrel of the writing utensil to allow an outer barrel to be fitted to the diameter reducing portion, eliminating problems such as rotation of the outer barrel or looseness occurred in the radial direction and the longitudinal direction or space with regard to a point member due to the shrinkage with time of the outer barrel in long-period use, even if the writing utensil has a structure grasping between a rear step part of the diameter reduced portion and the rear end face of the tapered point member arranged at the tip end of the barrel. <P>SOLUTION: In the decorative structure, a decorative body is arranged on a base material, and grasped and secured with a grasping means provided to the base material. The decorative body is dried and shrank by a thermal treatment, and secured to the base material by the grasping means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a decorative structure in which a decorative body is arranged on a base material, and the decorative body is sandwiched and fixed by clamping means provided on the base material.

Conventionally, an exterior shaft tube is provided with a reduced diameter portion having a concave shape with a reduced outer diameter in a part of a shaft tube of a writing instrument, and the exterior shaft tube is attached to the reduced diameter portion, and a rear step portion of the reduced diameter portion. A shaft cylinder of a writing instrument is known that is sandwiched between a taper and a rear end surface of a tapered member disposed at the tip of the shaft cylinder.
For example, the exterior shaft cylinder is a grip formed of a soft elastic body made of rubber or synthetic resin. Wearing the shaft of the writing instrument to prevent slipping of fingers, etc. when holding the gripping part of the shaft, or to reduce the fatigue of long-time writing or prevent the occurrence of phenomena such as tendonitis Has been.
However, the outer shaft barrel clamping structure described above often has a tip member arranged at the tip of the barrel being attached by a method such as screwing or press-fitting. Due to shrinkage, dimensional error / variation, etc., the outer shaft tube rotates relative to the shaft tube, the backlash occurs in the radial direction or the longitudinal direction, and there is a gap between the outer shaft tube and the tip member. There was a risk of formation.

Therefore, a phenomenon in which the outer shaft tube rotates with respect to the shaft tube, rattling occurs in the radial direction or the longitudinal direction, and a gap is formed between the outer shaft tube and the tip member. In order to avoid this, the outer shaft cylinder is sandwiched in a compressed state (Japanese Patent Laid-Open No. 2001-10277), and means for installing unevenness in the radial direction of the inner peripheral surface of the grip and the shaft body (Japanese Patent Laid-Open No. Hei 9). -175077 and JP-A-10-203077) have also been invented. The sheath cylinders of these inventions are effective when the material is formed of a soft elastic body made of a relatively soft rubber or synthetic resin.
Further, when the exterior shaft tube is formed of a hard material, the outer shaft tube is a tapered member disposed at the rear step portion of the reduced diameter portion formed on the shaft tube and the tip of the shaft tube. A structure (Japanese Patent Application Laid-Open No. 2003-305988) that is sandwiched between annular elastic members interposed between the rear end surfaces has also been invented.

JP 2001-10277 A Japanese Patent Laid-Open No. 9-175077 Japanese Patent Laid-Open No. 10-203077 JP 2003-305988 A

However, in the above-described invention, due to the long-term use of the writing instrument, the outer shaft tube rotates with respect to the shaft tube, rattling occurs in the radial direction or the longitudinal direction, and the outer shaft tube and the tip member Although the phenomenon that a gap is formed between them can be avoided to some extent, it has not been perfect yet. In other words, the dimensions of the outer casing are remarkably changed due to temperature (air temperature) change, humidity change, ultraviolet light, etc., and in the above-mentioned patent document, the change in the dimension cannot be absorbed. -ing
In view of such problems, the present invention is to provide a writing instrument shaft tube in which the above-described problems do not occur after long-term use.

  In the present invention, a decorative body is disposed on a base material, and the decorative body is sandwiched and fixed by sandwiching means provided on the base material, and after the decorative body is dried and contracted by heat treatment, the sandwiching means The gist is that it is fixed to the base material.

  In the present invention, a decorative body is disposed on a base material, and the decorative body is sandwiched and fixed by sandwiching means provided on the base material, and after the decorative body is dried and contracted by heat treatment, the sandwiching means Because it is fixed to the base material, the decoration can prevent the backlash and other movement of the decorative body relative to the base material, and can solve the problem that a gap is formed between the holding means Structure can be provided.

  Hereinafter, description will be made with reference to the drawings (in the description, the notation “rear” indicates the top in the drawing, and the notation “front” indicates the lower). 1 to 8 show an example in which the decorative structure of the present invention is applied to a rotary pay-out type ballpoint pen. However, in the present invention, the type of the feeding mechanism and the writing instrument is not limited to this embodiment, and can be adopted for the rear shaft cylinder of the cap type writing instrument.

Reference numeral 1 denotes a rear shaft 1 formed of a metal or a resin material. The rear portion of the rear shaft 1 is provided with a reduced diameter portion 1a serving as a bottom portion, and a through-hole 1c formed with two D-cut linear portions 1b facing each other on the inside. A crown stopper 2 is disposed inside the rear portion of the rear shaft 1. A screw portion 2a is formed at the rear portion of the head crown stopper 2. The screw portion 2a is provided with two flat portions 2c in which the screw portion is removed in a D-cut shape so as to face each other. Further, a non-screw part 2d is formed at the front part of the screw part 2a, and the flat part 2c is also provided at two locations facing each other. A step 2b is provided on the outer peripheral surface of the head cap 2, and the head cap 2 inserted from the front opening of the rear shaft 1 has a step 2b of the reduced diameter portion 1a of the rear shaft 1. Abutting on the inner stage, the threaded portion 2a and the non-threaded portion 2d are locked in a state protruding from the through hole 1c of the rear shaft 1. Examples of the material of the head cap 2 include a metal or a resin material.
Reference numeral 3 denotes a metal clip 3 including a clip main body 3a and a fixing ring portion 3b. In the fixing ring portion 3b, two straight portions 3c are formed in parallel in a D-cut shape, and through holes 3d are provided. The through hole 3d of the fixing ring portion 3b of the clip 3 is inserted into the non-threaded portion 2d of the head crown stopper 2 from the rear direction. The through hole 3d is slightly larger than the non-threaded portion 2d of the head crown 2. Further, the outer surface of the clip body 3a is decorated with marking by laser processing or printing.

A head crown 4 is disposed at the rear of the head crown stopper 2 and is fixed by screwing with a screw portion 2 a of the head crown stopper 2. At this time, the fixing ring portion 3 b of the clip 3 is fixed by being sandwiched between the front end surface 4 c of the head crown 4 and the rear end surface 1 d of the rear shaft 1. Further, by forming the straight portion 1b of the rear shaft 1, the flat portion 2c of the head crown 2 and the straight portion 3c of the clip 3, the head crown 2 and the clip 3 of the rear shaft 1 are formed. Relative rotation is prevented. By these anti-rotation actions, the head crown can be smoothly screwed onto the head crown stopper 2. In addition, if the jig | tool which positions the head crown stopper 2 in the back shaft 1 temporarily is used, the head crown stopper 2 can be stabilized and the head crown 4 can be screwed more smoothly. it can.
A through hole 4a is formed in the rear portion of the head crown 4, and a reduced diameter portion 4b is provided in the through hole 4a. A disc-shaped plate badge 5 is inserted into the through-hole 4a, and the diameter-reduced portion 4b and the diameter-reduced portion 4b are inserted from the front opening of the rear shaft 1 toward the diameter-reduced portion 4b. It is fixed to the rear end face 2e of the head crown 2 by a method such as adhesion (see FIG. 5). The badge 5 is decorated and is made of a metal or a resin material.
A ring member 6 is fixed to an end portion in the front direction of the rear shaft 1 by a method such as screwing, press fitting, or adhesion. The rear shaft 1 and the ring member 6 may be integrally formed. Further, a resin ring 7 is fixed to the ring member 6 by a method such as screwing, press fitting, or adhesion.
A screw portion 2f is provided inside the front portion of the head crown stopper 2, and a cam fixing screw 8 is fixed by screwing. The fixing method may be a method such as press-fitting or adhesion in addition to screwing, and the cam fixing screw 8 and the crown stopper 2 may be integrally formed.
A rotor 9 of a cam mechanism described later is press-fitted and fixed to the front outer peripheral surface 8a of the cam fixing screw 8. By forming a screw shape or a knurled shape on the outer peripheral surface 8a and press-fitting the rotor 9, the outer peripheral surface 8a is fixed more firmly.

The cam mechanism includes a rotor 9, a slider 10, and a cam outer cylinder 11 as shown in FIG. A cam outer cylinder 11 is detachably fixed by a core 12 and a screw portion described later. A rotor 9 is rotatably fitted in the cam outer cylinder 11, and a slider 10 is slidably fitted to the rotor 9. Further, the engaging protrusion 10a of the slider 10 is slidably disposed in the vertically long guide hole 11a provided in the cam cylinder 11, and the engaging protrusion 10a contacts and slides on the cam groove 9a of the rotor 9. By doing so, the ball-point pen refill 13 is fed out.
In the cam mechanism, the front screw portion 11b of the cam cylinder 11 has a core 12 that is detachably fixed by screwing, and the ballpoint pen can be removed by detaching the core 12 from the cam mechanism. The refill 13 can be replaced. The core 12 is made of metal.
Further, by reducing the clearance (gap) between the guide flange 12a of the core 12 and the inner diameter portion 7a of the resin ring 7 as much as possible, a rear shaft set including the rear shaft 1 and an outer shaft cylinder to be described later are provided. In the front shaft set 21 including 15, the feeding operation of the ball-point pen refill 13 by the cam mechanism can be obtained smoothly and with a quality free from radial play.
Further, a guide pipe 14 is fixed to the inside of the core 12 by a method such as screwing, press-fitting or adhesion, and is inserted straight when the ball-point pen refill 13 is replaced. Arranged to facilitate insertion.
On the outer peripheral portion of the core 12, a flange portion 12b is provided. A circumferential groove 12c is provided on the front side of the flange 12b.

Here, the attachment structure of the exterior shaft cylinder 15 (corresponding to the decorative body of the present invention) which is the gist of the present invention will be described in detail. A front middle shaft 16 is fixed to the front end of the core 12 by screwing. The fixing method may be a method other than screwing, such as press-fitting and adhesion, and the core 12 and the front middle shaft 16 may be formed integrally. The front center shaft 16 is made of a metal material such as aluminum or brass. The coupling state between the core 12 and the front middle shaft 16 corresponds to the base material of the present invention.
Reference numeral 17 denotes a tip member 17 formed of a metal material such as aluminum or brass, and the tip member 17 has a tip hole 17a for the writing portion of the ballpoint pen refill 13 to appear and disappear at the tip portion. . An inner diameter portion 17b is provided in the vicinity of the tip hole 17a, and the refill guide 18 is fixed to the inner diameter portion 17b by a method such as press fitting, screwing, or adhesion. The material of the refill guide 18 is resin. The refill guide 18 guides the outer periphery of the tip writing portion of the ballpoint pen refill 13 and can prevent rubbing noise and smooth feeding during the feeding operation. Since the material of the tip member 17 of the present invention employs a metal, in that case, it is effective to arrange the refill guide 18.
Further, an elastic member 19 such as a coil spring is disposed inside the tip member 17 and constantly urges the ballpoint pen refill 13 backward. The tip member 17 is fixed to the front end portion of the front middle shaft 16 by a method such as screwing, press fitting, or adhesion.
The exterior shaft cylinder 15 is disposed outside the core 12 and the front center shaft 16 so as to cover the outer shaft cylinder 15, and the exterior shaft tube 15 includes the flange portion 12 b of the core 12 and the rear end surface 17 c of the tip member 17. It is clamped and fixed so that it may be pinched | interposed between. An annular elastic member 20 is disposed in the groove portion 12c provided in the flange portion 12b of the core 12 to prevent the outer shaft cylinder 15 from rattling in the radial direction and the longitudinal direction, and preventing rotation in the radial direction. It is held in the state to do. The annular elastic member 20 is configured to protrude from 0.35 to 0.50 mm from the opening end face of the groove 12c provided in the flange 12b of the core 12.
Furthermore, as shown in FIGS. 7 and 8 (enlarged portion A in FIG. 7), a triangular convex portion 17d having an acute angle is provided on the rear end surface 17c of the tip member 17 in a spiral shape. This is to prevent the outer casing 15 from rotating in the radial direction.

The outer cylinder 15 can be made of a hard resin or a material such as a relatively soft rubber or a synthetic resin, but is effective when processed from a natural material. What processed this into the cylinder shape is preferable. Cow horn is used for stamps (materials for seals), crafts, and buttons for duffel coats. Among products, it is most often used as a stamp.
Since beef horn is a natural product, properties such as hardness are individually different. Therefore, even if the dimensions are processed in the same manner, the variation becomes large. After processing, even if it becomes a part state, it is easily affected by the external environment, and the dimensions shrink at high temperatures and low humidity, and conversely, the dimensions expand at high temperatures and high humidity.
Therefore, in the case where the material of the outer shaft cylinder 15 is a cow horn, the assembly method will be described in view of the effect that the dimensions shrink under high temperature and low humidity. Specifically, it has been confirmed that the entire length contracts by 0.20 to 0.30 mm. The front middle shaft 16 is fixed to the core 12 in which the annular elastic member 20 is disposed in the groove portion 12c of the core 12, and the outer shaft cylinder 15 is inserted from the front direction in the combined state. 17 is screwed into a screw portion provided at the front portion of the front middle shaft 16. At this time, the tip member 17 is screwed with a light torque to form a front shaft set 21 and a temporary set assembly (see FIG. 6). At this time, a gap of about 0.35 to 0.50 mm from the flange 12b is formed on the flange 12b of the core 12 and the rear end surface of the exterior shaft cylinder 15. That is, at the time of this temporary set assembly, the exterior shaft cylinder 15 is in a state where no tightening force due to screwing or the like is generated and no load is applied.
The front shaft set 21 is allowed to stand for a certain period of time under high temperature and low humidity (hereinafter referred to as time elapsed). Specifically, a temperature of 40 ° C. or higher and a humidity of 40% or lower and a time of aging of 24 hours or longer, particularly a temperature of 50 ° C. and a humidity of 30% of 48 hours is preferable. If the temperature is too high, the strength of the material will be affected, and even if the humidity is too low, the dimensions of the exterior shaft cylinder 15 will be significantly shrunk. As a result, the core 12 and the outer periphery of the front center shaft 16 will be hugged ( Fixing workability after the actual set (assembly) becomes worse. In addition, even after 48 hours or more (for example, 5 days), there is no significant change in the dimensions of the outer sleeve 15 (the dimension hardly changes after 48 hours). Waste is generated from the viewpoint of productivity. In addition, the change of the dimension of the said exterior axial cylinder 15 is more remarkable than the change of the radial direction rather than the radial direction.
Next, after 48 hours, the tip member 17 is unscrewed. As described above, between the flange 12b of the core 12 of the front shaft set 21 and the rear end face of the exterior shaft cylinder 15, a distance of 0.35 to 0.50 mm protrudes from the front end of the opening of the flange 12b. An annular elastic member 20 is interposed, and a gap is also present. In order to eliminate this gap, the exterior shaft cylinder 15 is moved backward using a jig such as a hand press. Incidentally, the outer casing 15 is contracted and adhered so that it cannot be moved by human force (to the core 12 and the front middle shaft 16). Thereafter, the screwing of the front member 17 and the front center shaft 16 is tightened with a strong torque (5 kg · cm or more) and finally fixed (final tightening step). As a result, the gap between the rear end of the exterior shaft cylinder 15 and the annular elastic member 20 disappears, and the annular elastic member 20 is compressed by the rear end of the exterior shaft cylinder 15 to complete the assembly of the front shaft set 21.

Next, the operation will be described. By completing the temporary set product of the front shaft set 21 by the above means, the following effects can be obtained.
1. The outer shaft 15 made of bull horn or resin shrinks in the radial direction, so that the core 12 and the outer periphery of the front center shaft 16 are hugged (adhered to each other), and the radial rattling is prevented from rotating. Is done.
2. The exterior shaft cylinder 15 formed of cow horn or resin is contracted in the longitudinal direction, and then the tip member 17 is subjected to a final tightening process (compression process of the exterior shaft cylinder 15) with a strong torque. Thereafter, the humidity is higher in the environment where the normal product is used (room temperature) than in the temporary set aging environment (high temperature, low humidity and left for a certain period of time). Power to try to restore to work. Therefore, the exterior shaft cylinder 15 that is clamped and fixed further increases the biasing force to the annular elastic member 20 disposed in the rear end surface 17c of the front member 17, the flange 12b of the core 12, and the groove 12c. As a result, backlash in the longitudinal direction is further prevented.
3. On the other hand, the force to expand and restore in the radial direction is given an external force to the exterior shaft cylinder by the compression process of the exterior shaft cylinder 15, and the rear end surface 17 c of the tip member 17 has an acute angle. Since the convex portion 17d is provided in a spiral shape, the convex portion 17d bites into the front end surface of the outer shaft cylinder 15, and this biting action suppresses radial expansion and prevents rotation. .
In addition, since the material of the said core 12, the front center axis | shaft 16, and the front member 17 is formed from the metal, those shrinkage | contractions are a range which can be substantially disregarded by the component dimension comprised as a writing instrument.
In the above example, the present invention is applied to a writing instrument. However, the present invention is not limited to a writing instrument. For example, the present invention may be applied to an outer peripheral surface of a seal body, and a mobile phone or pen You may adapt to a flat-shaped exterior body, such as a stand and a handle of a knife. Examples applied to the handle of the knife will be described in detail with reference to FIGS. The sharp knife 22 is fixed to a handle 23, and recesses 23a are formed on both sides of the handle 23. The recesses 23a are subjected to the process of the present invention, that is, constant at high temperature and low humidity. A bull horn 24 that is left to contract for a period is disposed. Projections 24 a are formed at both (front and rear) ends of the cow horn 24, and one of the projections 24 a is fitted into an engagement hole 23 c formed in the step 23 b of the handle 23. Yes. A tail plug 25 is fixed to the rear portion of the handle 23 by means such as adhesion. A press-fitting protrusion 25a is formed in front of the tail plug 25 and is firmly press-fitted into a press-fitting hole 23d formed at the rear end of the handle 25. Further, an engagement hole 25b is formed in front of the tail plug 25, and a protrusion 24a formed on the other side of the cow horn 24 is fitted. That is, in this example, the contracted bull horn 24 is sandwiched between the stepped portion 23 b formed on the handle 23 and the tail plug 25.
Moreover, although cow horn was illustrated as a natural material, natural materials, such as a deer horn, a sheep horn, and ivory, are mentioned, for example, and the effect similar to this invention is acquired.

1 is a cut front view of an embodiment according to the present invention. 2 is an external perspective view of a rear shaft 1. FIG. It is a peripheral component external appearance perspective view before clip clamping. It is each components perspective view of the cam mechanism in one Example by this invention. FIG. 4 is an external perspective view of the vicinity of the crown 4 before the badge 5 is attached. FIG. 3 is a cut front view of the front shaft set 21. FIG. 3 is a cut front view of a tip member 17. It is the A section expansion cutting front view in FIG. 1 is an external perspective view of a knife according to the present invention. 3 is an external perspective view of a handle 23. FIG. 2 is an external perspective view of a cow horn 24. FIG. It is a perspective view before the tail plug 25 is fixed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rear axis | shaft 1a Reduced diameter part 1b D cut-shaped linear part 1c Through-hole 1d Rear end surface 2 Head crown 2a Screw part 2b Step part 2c Plane part 2d Non-screw part 2e Rear end face 2f Screw part 3 Clip 3a Clip main body 3b Fixing ring Part 3c D-cut linear part 3d Through hole
4 Head crown 4a Through hole 4b Reduced diameter portion 4c Front end face 5 Badge 6 Ring member 7 Resin ring 7a Inner diameter portion 8 Cam fixing screw 8a Front outer peripheral surface 9 Rotor 9a Cam groove 10 Slider 10a Engagement protrusion 11 Cam Outer cylinder 11a Longitudinal guide hole 11b Screw part 12 Core 12a Guide flange 12b flange 12c Groove 13 Ball-point pen refill 14 Guide pipe 15 Outer shaft 16 Front center shaft 17 Front member 17a End hole 17b Inner diameter 17c Rear end surface 17d Protrusion 18 Refill guide 19 Elastic member 20 Annular elastic member 21 Front shaft set 22 Knife 23 Handle 23a Recess 23b Step 23c Engagement hole 23d Press-fitting hole 24 Cow horn 24a Protrusion 25 Tail plug 25a Press-fitting protrusion 25b Engagement hole

Claims (3)

A decorative body is disposed on the base material, and the decorative body is sandwiched and fixed by clamping means provided on the base material, and after the decorative body is dried and contracted by heat treatment, the sandwiched means is attached to the base material. A decorative structure characterized by being fixed. The decorative structure according to claim 1, wherein an elastic member is interposed between the decorative body and the clamping means. The decorative structure according to claim 1 or 2, wherein a sandwiching means is bitten into the decorative body.

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