JP2009178975A - Insertion structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems of causing deviation and play by the movement of an outer cylinder allowed to radially move with respect to a holding member due to a clearance formed between the holding member and the outer cylinder, and resulting in writing with a sense of incongruity due to the occurrence of the play. <P>SOLUTION: The insertion structure of members different in the expansion ratio and/or expanding direction has an elastic member interposed between the members wherein at least one member approaches the other member. The insertion structure of members different in the expansion ratio has an elastic member interposed between the members wherein at least one member approaches the other member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an insertion structure for members having different stretch rates and / or stretch directions.

  As an example, in a writing instrument in which the shaft cylinder of the writing instrument body and / or the outer cylinder of the cap is formed of a natural material such as wood or ivory, the shaft cylinder or / and the outer cylinder have clamping portions at both ends. A cylindrical holding member is disposed, and both end edges of the shaft cylinder or / and the outer cylinder are clamped and held by the clamping portion via a cushion material, and the inner peripheral surface of the shaft cylinder or / and the outer cylinder and the holding member There is a writing instrument in which a gap that absorbs the amount of deformation in the radial direction of the shaft cylinder and / or the outer cylinder is formed between the outer peripheral surfaces.

  That is, the writing instrument absorbs the amount of deformation in the longitudinal direction due to environmental conditions such as temperature and humidity by the cushion material and absorbs the amount of deformation in the radial direction through the gap.

JP 2005-88319 A

  However, in the above prior art, a gap is formed between the holding member and the outer cylinder. Therefore, the outer cylinder may move in the radial direction with respect to the holding member due to the gap, and this movement causes vibration and backlash. And due to the backlash, the writing was uncomfortable.

  The first aspect of the present invention is an insertion structure of members having different expansion ratios and / or expansion / contraction directions, wherein at least one member interposes an elastic member between members approaching the other member, The second gist is an insertion structure of members having different expansion / contraction ratios, in which an elastic member is interposed between members in which at least one member approaches the other member.

  The first aspect of the present invention is an insertion structure of members having different expansion ratios and / or expansion / contraction directions, wherein at least one member interposes an elastic member between members approaching the other member, Since the second gist is that the elastic member is interposed between the members in which at least one member approaches the other member because of the insertion structure of the members having different expansion / contraction ratios, For example, when the present invention is applied to a writing cylinder, good writing feeling can be obtained.

  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 formed from 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 formed of brass, which is a metal material. 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 project from 0.35 mm to 0.50 mm from the opening end face of the groove 12 c provided in the flange 12 b of the core 12.
Further, as shown in FIGS. 7 and 8 (enlarged portion A in FIG. 7), the triangular protrusion 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 exterior shaft cylinder 15 is formed of cow horn (cow horn), which is a natural material, and the cow horn is processed into a cylindrical shape and used. 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, when the material of the exterior shaft cylinder 15 is a cow horn, in view of the effect that the dimensions shrink under high temperature and low humidity, in the present invention, the outer surface of the front middle shaft 16 and the core 12 and the inner surface of the exterior shaft tube 15 are used. A gap 22 is provided between the two. More specifically, the outer diameter of the front middle shaft 16 and the core 12 is 8.77 mm, while the inner diameter of the exterior shaft cylinder is 9.00 mm. That is, when the outer surface of the front center shaft 16 and the core 12 and the central axis of the outer casing 15 match, a 0.23 mm gap 22 is formed in a circumferential shape (see FIG. 6; FIG. 1). BB line sectional view). A sponge 23 made of a porous body having elasticity is inserted into the gap 22. In this example, an elastic body such as a sponge is illustrated, but a moisturizing material or a heat retaining material may be inserted.

  The operation will be described. A gap 22 is provided between the outer surface of the front middle shaft 16 and the core 12 and the inner surface of the exterior shaft cylinder 15. Since the sponge 23 is inserted into the gap 22, the outer shaft cylinder 15 is attached to the front shaft 15. There will be no wobbling or rattling of the middle shaft 16 or the like. Moreover, when the temperature of the cow horn which is the exterior shaft cylinder 15 rises and the humidity decreases, the cow horn contracts, but the contraction operation is absorbed by contracting the sponge. At the same time, the pores of the sponge 23 absorb heat, and the moisture present in the sponge diverges toward the cow horn, so that contraction of the cow horn (exterior shaft tube 15) is prevented as much as possible. Contrary to the above, when the humidity rises, the sponge absorbs damp horn moisture and the bull horn expansion is prevented as much as possible.

As the material of the front center shaft 16, the core 12, and the outer shaft tube 15, in addition to brass and cow horn, animal natural materials such as unicorn, ivory, black buffalo, sheep horn, river horse, granite (quartz), serpentine, etc. Wood, natural materials such as cedar, cherry, lawan, cypress, oak, zelkova and cork, metal materials such as iron, brass, aluminum, stainless steel and magnesium, resin materials such as polycarbonate, nylon, nitrile butadiene styrene and polypropylene Is mentioned.
Furthermore, examples of elastic bodies include cloth, silicone rubber, natural rubber, etc., in addition to sponges. Examples of moisturizing materials include hyaluronic acid and seed oil, and examples of heat insulating materials. Examples thereof include water, normal paraffin, and inorganic salts.

Next, various embodiments in which the respective materials are combined will be described. Incidentally, the first example is an example in which the front middle shaft 16 and the core 12 are formed of brass, the outer shaft cylinder 15 is formed of a cow horn, and a sponge 23 is inserted into the gap 22.
A second example will be described. This is an example in which the front center shaft 16 and the core 12 are formed of brass, the outer shaft 15 is formed of a single beast, and a moisture retaining material (hyaluronic acid) 24 is inserted into the gap 22. Similarly to the first example, when the temperature of the unicorn that is the outer casing 15 rises and the humidity decreases, the unicorn contracts, but the contraction operation is absorbed by the moisturizing material 23. At the same time, the moisture contained in the moisturizing material 24 diverges toward the unicorn, so that the unicorn (exterior shaft tube 15) is prevented from contracting as much as possible.
A third example will be described. This is an example in which the front center shaft 16 and the core 12 are made of iron, the outer shaft 15 is made of nitrile butadiene styrene, and an elastic body 23 (silicone rubber) is inserted into the gap 22. When the temperature of the nitrile butadiene styrene which is the outer casing 15 is lowered and the humidity is lowered, the nitrile butadiene styrene contracts, but the contraction operation is absorbed by the silicone rubber 23.
A fourth example will be described. This is an example in which the front center shaft 16 and the core 12 are formed of quartz, the exterior shaft cylinder 15 is formed of cork, and a moisturizing material (seed oil) 24 is inserted into the gap 22. Similarly to the first example, when the temperature of the cork that is the outer shaft cylinder 15 rises and the humidity becomes low, the cork shrinks, but the shrinking operation is absorbed by the moisturizing material 24. At the same time, the moisture contained in the moisturizing material 24 diverges toward the cork, so that the shrinkage of the cork (exterior shaft cylinder 15) is prevented as much as possible.

A fifth example will be described. In this example, the front center shaft 16 and the core 12 are formed of polycarbonate, the exterior shaft 15 is formed of iron, and an elastic body (sponge) 23 is inserted into the gap 22. When the temperature of the polycarbonate which is the outer casing 15 is increased and the humidity is increased, the polycarbonate is stretched, but the stretching motion is absorbed by the sponge 23. At the same time, the sponge 23 absorbs heat and moisture is also emitted toward the polycarbonate, so that the expansion of the polycarbonate (exterior shaft cylinder 15) is prevented as much as possible.
A sixth example will be described. The front center shaft 16 and the core 12 are made of quartz, the outer shaft cylinder 15 is made of cork, and the moisturizing material (seed oil) 24 and the heat insulating material (normal paraffin) 25 are mixed in the gap 22 and inserted. This is an example. Similar to the first example, when the temperature of the cork that is the outer shaft cylinder 15 rises and the humidity decreases, the cork shrinks, but the shrinking action is absorbed by the moisturizing material 24. At the same time, heat is absorbed by the heat insulating material 25 and the moisturizing material 24 diverges moisture toward the cork, so that the cork (exterior shaft cylinder 15) is prevented from contracting as much as possible.

  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.

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. It is the BB sectional view taken on the line of FIG. FIG. 3 is a cut front view of a tip member 17. It is the A section enlarged cutting front view of FIG.

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 Exterior shaft cylinder 16 Front center shaft 17 Tip member 17a End hole 17b Inner diameter 17c Rear end surface 17d Protrusion 18 Refill guide 19 Elastic member 20 Annular elastic member 22 Gap 23 Elastic body 24 Moisturizing material 25 Insulating material

Claims (3)

An insertion structure for members having different expansion ratios and / or expansion / contraction directions, wherein an elastic member is interposed between members in which at least one member approaches the other member. An insertion structure for members having different expansion / contraction ratios, wherein at least one member interposes a moisturizing material and / or a heat insulating material between members approaching the other member. The insertion structure according to claim 1, wherein the at least one member is a natural material.

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