JP2005305932A - Writing instrument equipped with bar-shaped feeding out mechanism - Google Patents

Writing instrument equipped with bar-shaped feeding out mechanism Download PDF

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JP2005305932A
JP2005305932A JP2004128836A JP2004128836A JP2005305932A JP 2005305932 A JP2005305932 A JP 2005305932A JP 2004128836 A JP2004128836 A JP 2004128836A JP 2004128836 A JP2004128836 A JP 2004128836A JP 2005305932 A JP2005305932 A JP 2005305932A
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shaped object
rod
bar
writing
writing instrument
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Shuhei Kageyama
秀平 陰山
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Kotobuki and Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a writing instrument equipped with a bar-shaped article feeding out mechanism which has a small number of parts, and can feed out a bar-shaped article without relatively rotating it to a knocking cap. <P>SOLUTION: This writing instrument is equipped with an external cylinder 12, a lead feeding out mechanism 14 which is arranged in the external cylinder 12, and the bar-shaped article feeding out mechanism 16 which is connected with the rear section of the lead feeding out mechanism 14. A female thread 20a is formed on the inner peripheral surface of the rear section of a lead tank 20 of the lead feeding out mechanism 14. The bar-shaped article feeding out mechanism 16 is equipped with the knocking cap 30 which is relatively rotatably connected with the lead feeding out mechanism 14, and a bar-shaped article receiving base 32 for holding a bar-shaped article 34, which becomes slidable in the knocking cap 30 while preventing the relative rotation from occurring. On the bar-shaped article receiving base 32, a male thread 32d which is screwed with the female thread 20a on the lead tank 20 is integrally formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、棒状物繰出し機構を備えた筆記具に関する。   The present invention relates to a writing instrument provided with a rod-like object feeding mechanism.

従来この種の筆記具としては、例えば、実公平５−４５５１３号公報（特許文献１）や特開平４−２５４９９号公報（特許文献２）に記載されたものが知られている。   Conventionally, as this type of writing instrument, for example, those described in Japanese Utility Model Publication No. 5-45513 (Patent Document 1) and Japanese Patent Application Laid-Open No. 4-25499 (Patent Document 2) are known.

特許文献１に記載されたシャープペンシルは、外筒内に筆記軸体が配設され、筒状キャップの後方部内面に螺旋溝が設けられ、筒状体の後方部分が筒状キャップに相対回転可能に取り付けられ、該筒状体の後方部分にスリットが設けられ、スリットに消しゴム受台が摺動自在に嵌め込まれ、消しゴム受台に設けた突起が前記螺旋溝に螺合され、筒状体の前方部分が外筒に着脱自在に、相対回転不能に且つ軸方向に移動自在とされた構成としている。   In the mechanical pencil described in Patent Document 1, a writing shaft body is disposed in an outer cylinder, a spiral groove is provided in an inner surface of a rear portion of the cylindrical cap, and a rear portion of the cylindrical body is relatively rotated with respect to the cylindrical cap. A slit is provided in the rear portion of the cylindrical body, and an eraser cradle is slidably fitted into the slit, and a protrusion provided on the eraser cradle is screwed into the spiral groove to form a cylindrical body. The front part is configured to be detachable from the outer cylinder, non-rotatable and movable in the axial direction.

特許文献２に記載されたシャープペンシルは、外筒内に筆記体が配設され、筆記体の芯タンクの後端内周面に突起が形成され、消しゴム受台としてのホルダに該突起に係合する長溝が形成されると共にネジ軸が形成され、回転スリーブの内周面に該ホルダのネジ軸に螺合するネジ条が形成されており、回転スリーブが芯タンクの後端部に相対回転可能に係止された構成としている。   In the mechanical pencil described in Patent Document 2, a writing body is disposed in an outer cylinder, a protrusion is formed on the inner peripheral surface of the rear end of the core tank of the writing body, and a holder as an eraser cradle is associated with the protrusion. A long groove is formed and a screw shaft is formed. A screw thread is formed on the inner peripheral surface of the rotary sleeve to be screwed into the screw shaft of the holder. The rotary sleeve rotates relative to the rear end of the core tank. The structure is locked as possible.

いずれにおいても、外筒と後筒との間の相対回転によって、消しゴム受台に保持された消しゴムが後筒の後端から出没可能となっている。   In any case, the eraser held by the eraser cradle can be projected and retracted from the rear end of the rear cylinder by the relative rotation between the outer cylinder and the rear cylinder.

しかしながら、特許文献１では、部品点数が多く、また、いずれの文献も消しゴム受台と後筒とが螺合しており、消しゴム受台に保持された消しゴムが後筒に対して相対回転しながら繰出されるために、消しゴムの繰出し量に対して消しゴムが後筒の内周面と摺接する距離が長くなり、そのため操作効率が悪いという問題がある。   However, in Patent Document 1, the number of parts is large, and in each document, the eraser cradle and the rear cylinder are screwed together, and the eraser held on the eraser cradle rotates relative to the rear cylinder. Since it is fed out, the distance that the eraser comes into sliding contact with the inner peripheral surface of the rear cylinder is increased with respect to the feed amount of the eraser.

実公平５−４５５１３号公報Japanese Utility Model Publication No. 5-45513 特開平４−２５４９９号公報Japanese Patent Laid-Open No. 4-25499

本発明は、かかる課題に鑑みなされたもので、その目的は、少ない部品点数で且つ棒状物を後筒に対して相対回転させずに繰出すことができる棒状物繰出し機構を備えた筆記具を提供することである。   The present invention has been made in view of such a problem, and an object of the present invention is to provide a writing instrument including a rod-shaped object feeding mechanism capable of feeding a rod-shaped object without rotating relative to the rear cylinder with a small number of parts. It is to be.

上記目的を達成するために本発明のうち請求項１記載の発明は、外筒と、外筒内に配設される筆記軸体と、筆記軸体の後部に連結された棒状物繰出し機構と、を備えた筆記具において、
筆記軸体は、内周面に雌ねじが形成された部分を有し、該部分は外筒と相対回転不能となっており、
棒状物繰出し機構は、前記筆記軸体に相対回転可能に連結された後筒と、該後筒内を相対回転不能に且つ軸方向に摺動可能となり棒状物を保持する棒状物受台と、を備えており、棒状物受台には、前記筆記軸体の雌ねじに螺合する雄ねじが一体に形成されることを特徴とする。 In order to achieve the above object, the invention according to claim 1 of the present invention comprises an outer cylinder, a writing shaft disposed in the outer cylinder, and a rod-like object feeding mechanism connected to the rear portion of the writing shaft. In a writing instrument with
The writing shaft body has a portion in which an internal thread is formed on the inner peripheral surface, and the portion cannot rotate relative to the outer cylinder.
A rod-shaped object feeding mechanism includes a rear cylinder coupled to the writing shaft body so as to be relatively rotatable, a rod-shaped object cradle that is slidable in the axial direction so as not to be relatively rotatable within the rear cylinder, and holds the rod-shaped object; And a male screw threadedly engaged with the female screw of the writing shaft body is integrally formed on the rod-shaped object receiving base.

請求項２記載の発明は、請求項１記載のものにおいて、前記棒状物受台が棒状物を挟持する保持部を備えており、該保持部は、前記後筒の内周面に形成された縦溝に摺動可能に嵌合することを特徴とする。   According to a second aspect of the present invention, in the first aspect of the present invention, the rod-shaped object pedestal includes a holding portion for holding the rod-shaped object, and the holding portion is formed on the inner peripheral surface of the rear cylinder. It is characterized by being slidably fitted into the longitudinal groove.

請求項３記載の発明は、請求項１または２記載のものにおいて、棒状物受台の先端部には該雄ねじが形成されていない部分が設けられており、該雄ねじが形成されていない部分にはスリットが形成されることを特徴とする。   The invention described in claim 3 is the one described in claim 1 or 2, wherein a portion where the male screw is not formed is provided at the tip of the rod-shaped object pedestal, and the portion where the male screw is not formed. Is characterized in that a slit is formed.

請求項４記載の発明は、請求項１ないし３のいずれか１項に記載のものにおいて、前記棒状物受台には、筆記軸体の中心孔と連通する中心孔が貫通して形成されることを特徴とする。   According to a fourth aspect of the present invention, in the one according to any one of the first to third aspects, a central hole that communicates with a central hole of the writing shaft body is formed through the rod-shaped object receiving base. It is characterized by that.

本発明によれば、棒状物を繰出す操作を行なうときには、後筒を外筒に対して回転させると、後筒に対して相対回転不能となった棒状物受台と外筒に対して相対回転不能となった筆記軸体の部分との間で相対回転が発生し、棒状物受台の雄ねじは、筆記軸体の雌ねじに誘導されて移動して、棒状物受台は後筒内を軸方向に移動するので、棒状物が繰出される。棒状物受台と後筒とは相対回転不能であるため、棒状物も後筒と相対回転せずに、後筒に対して直線的に繰出されることとなる。これにより操作効率を良好にすることができる。また、少ない部品点数で構成することができる。   According to the present invention, when the operation of feeding the rod-shaped object is performed, if the rear cylinder is rotated with respect to the outer cylinder, the rod-shaped object receiving base and the outer cylinder, which are not rotatable relative to the rear cylinder, are relative to each other. Relative rotation occurs between the writing shaft body portion which has become non-rotatable, and the male thread of the rod-shaped object pedestal is guided and moved by the female thread of the writing shaft body. Since it moves in the axial direction, the rod-shaped object is fed out. Since the rod-shaped object receiving base and the rear cylinder cannot be rotated relative to each other, the bar-shaped object is fed out linearly with respect to the rear cylinder without rotating relative to the rear cylinder. Thereby, the operation efficiency can be improved. Further, it can be configured with a small number of parts.

以下、図面を用いて本発明の実施の形態を説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図において、符号１０は筆記具としてのシャープペンシルであり、シャープペンシル１０は、大まかに、外筒１２と、外筒１２内に配設され芯を送り出す筆記軸体である芯送出し機構１４と、芯送出し機構１４の後部に連結された棒状物繰出し機構１６と、を備えている。   In the figure, reference numeral 10 denotes a mechanical pencil as a writing instrument. The mechanical pencil 10 is roughly an outer cylinder 12, and a lead feeding mechanism 14 which is a writing shaft body disposed in the outer cylinder 12 to feed a lead; And a rod-like object feeding mechanism 16 connected to the rear part of the lead feeding mechanism 14.

外筒１２は、図示の例では、一体成形品となっているが、複数の部材から構成することが可能である。   Although the outer cylinder 12 is an integrally molded product in the illustrated example, it can be composed of a plurality of members.

外筒１２内には芯送出し機構１４が配設される。芯送出し機構１４は、公知のように、芯を収納する芯タンク２０と、芯タンク２０の先端に固定され芯の締付及び送出しを行なうチャック２２と、チャック２２の外周側にあってチャック２２を締付可能となったチャックリング２４と、チャックリング２４の後退を規制するスリーブ２６と、スリーブ２６の前端と芯タンク２０の前端との間に介挿されるリターンスプリング２８と、を備えている。スリーブ２６は、外筒１２に形成された開口に係止される係止片２６ａを有しており、スリーブ２６は外筒１２に対して固定される。リターンスプリング２８は、芯タンク２０及びこれに固定されたチャック２２を後方へと付勢している。   A lead feeding mechanism 14 is disposed in the outer cylinder 12. As is well known, the lead feeding mechanism 14 is provided on the outer peripheral side of the lead tank 20 for storing the lead, the chuck 22 fixed to the tip of the lead tank 20 for tightening and feeding the lead, and the chuck 22. A chuck ring 24 in which the chuck 22 can be tightened, a sleeve 26 that restricts the retraction of the chuck ring 24, and a return spring 28 that is inserted between the front end of the sleeve 26 and the front end of the core tank 20. ing. The sleeve 26 has a locking piece 26 a that is locked to an opening formed in the outer cylinder 12, and the sleeve 26 is fixed to the outer cylinder 12. The return spring 28 urges the lead tank 20 and the chuck 22 fixed thereto to the rear.

また、図２及び図３に示すように、芯タンク２０の外周面には、外径方向に突出する突出部２０ｃが周方向に離間して複数個形成されており、該突出部２０ｃは外筒１２の内周面に形成された縦溝１２ａに摺動可能に嵌合している。これによって、芯タンク２０と外筒１２との間は相対回転不能で且つ軸方向に摺動可能となっている。尚、この突出部２０ｃと縦溝１２ａとによって芯タンク２０と外筒１２とを相対回転不能とする構成に限るものではなく、外筒１２の内周面に縦リブ、芯タンク２０の外周面に縦溝を設けてもよく、または、外筒１２の内周面と芯タンク２０の外周面を互いに嵌合する多角形形状とすることでもよい。   Further, as shown in FIGS. 2 and 3, a plurality of protruding portions 20c protruding in the outer diameter direction are formed on the outer peripheral surface of the core tank 20 so as to be spaced apart from each other in the circumferential direction. The cylinder 12 is slidably fitted in a longitudinal groove 12a formed on the inner peripheral surface of the cylinder 12. Thus, the core tank 20 and the outer cylinder 12 are not rotatable relative to each other and are slidable in the axial direction. The protruding portion 20c and the vertical groove 12a are not limited to the configuration in which the core tank 20 and the outer cylinder 12 cannot be rotated relative to each other, but the inner peripheral surface of the outer cylinder 12 has a vertical rib and the outer peripheral surface of the core tank 20. A vertical groove may be provided on the inner surface, or the inner peripheral surface of the outer cylinder 12 and the outer peripheral surface of the core tank 20 may be formed into a polygonal shape that fits each other.

また、図４に示すように、芯タンク２０の後端部の内周面には螺旋状の短い突条が形成されており、該突条が雌ねじ２０ａとなる。   Moreover, as shown in FIG. 4, the spiral short protrusion is formed in the inner peripheral surface of the rear-end part of the core tank 20, and this protrusion becomes the internal thread 20a.

図１に示すように、棒状物繰出し機構１６は、後筒としてのノックキャップ３０と、棒状物としての消しゴム３４を保持する棒状物受台３２とを備えている。ノックキャップ３０は、芯タンク２０の後端部の外周面に形成された環状突起２０ｂに係合する環状凹部３０ａを有しており、これによって、芯タンク２０の後部に相対回転可能に且つ軸方向移動不能に連結される。ノックキャップ３０の先端は、図示のように、外筒１２の後端よりも後方に位置付けられていてもよいが、これに限るものではなく、ノックキャップ３０の先端が外筒１２の後端よりも前方に位置づけられる態様、即ち、ノックキャップ３０が外筒１２の後端部を包囲するオーバキャップの態様、またはノックキャップ３０が外筒１２の後端部内に進入する態様となっていてもよい。   As shown in FIG. 1, the rod-shaped object feeding mechanism 16 includes a knock cap 30 as a rear cylinder and a rod-shaped object receiving base 32 that holds an eraser 34 as a rod-shaped object. The knock cap 30 has an annular recess 30a that engages with an annular protrusion 20b formed on the outer peripheral surface of the rear end portion of the core tank 20, so that the rear end of the core tank 20 can rotate relative to the rear portion of the core tank 20 and the shaft. It is connected so that it cannot move. The tip of the knock cap 30 may be positioned rearward of the rear end of the outer cylinder 12 as shown in the figure, but is not limited to this, and the front end of the knock cap 30 is more than the rear end of the outer cylinder 12. May be positioned forward, that is, an overcap in which the knock cap 30 surrounds the rear end of the outer cylinder 12, or an aspect in which the knock cap 30 enters the rear end of the outer cylinder 12. .

ノックキャップ３０の後部の内周面には、軸方向に伸びる一対の縦溝３０ｂ、３０ｂが形成されている（図６参照）。   A pair of longitudinal grooves 30b and 30b extending in the axial direction are formed on the inner peripheral surface of the rear portion of the knock cap 30 (see FIG. 6).

棒状物受台３２は、図５に示したように、消しゴム３４を保持するための保持部３２ａと、保持部３２ａから前方へと伸びる雄ねじ軸３２ｂとを備えている。保持部３２ａは、消しゴム３４を挟持する一対の挟持片３２ｃ、３２ｃから構成され、挟持片３２ｃは、前記ノックキャップ３０の縦溝３０ｂに軸方向に摺動可能に嵌合される。また、雄ねじ軸３２ｂの雄ねじ３２ｄは、前記芯タンク２０の雌ねじ２０ａに螺合する。   As shown in FIG. 5, the rod-shaped object receiving base 32 includes a holding portion 32a for holding the eraser 34, and a male screw shaft 32b extending forward from the holding portion 32a. The holding portion 32a is composed of a pair of clamping pieces 32c and 32c that clamp the eraser 34, and the clamping piece 32c is fitted in the longitudinal groove 30b of the knock cap 30 so as to be slidable in the axial direction. The male screw 32 d of the male screw shaft 32 b is screwed into the female screw 20 a of the core tank 20.

雄ねじ軸３２ｂの先端部には、雄ねじ３２ｄがなくなった部分の範囲にほぼ亘り、軸方向に伸びるスリット３２ｅが形成されている。スリット３２ｅの数は、図の例では１つとなっているが、これに限るものではなく、２つ以上設けることも可能である。これによって、組立時、棒状物繰出し機構１６を芯タンク２０に連結するために、棒状物受台３２の雄ねじ軸３２ｂを芯タンク２０の後端部内に挿入する際に、スリット３２ｅの弾性を利用して雄ねじ軸３２ｂの先端部を芯タンク２０内へと押し込むことで、雄ねじ軸３２ｂの先端部が芯タンク２０の雌ねじ２０ａを通過することができ、簡単に取り付けることができるようになる。この雄ねじ軸３２ｂの先端部の雄ねじ３２ｄがなくなった部分は、芯タンク２０からの棒状物受台３２の抜け止めとして作用する。   A slit 32e extending in the axial direction is formed substantially at the tip of the male screw shaft 32b over the range where the male screw 32d is removed. The number of slits 32e is one in the example of the drawing, but is not limited to this, and two or more slits 32e can be provided. Thus, the elasticity of the slit 32e is utilized when the male threaded shaft 32b of the rod-shaped object receiving base 32 is inserted into the rear end portion of the core tank 20 in order to connect the rod-shaped object feeding mechanism 16 to the core tank 20 during assembly. By pushing the tip of the male screw shaft 32b into the core tank 20, the tip of the male screw shaft 32b can pass through the female screw 20a of the core tank 20 and can be easily attached. The portion where the male screw 32d at the tip of the male screw shaft 32b is removed acts as a stopper for removing the rod-shaped object receiving base 32 from the core tank 20.

また、雄ねじ軸３２ｂには中心孔３２ｆが軸方向に貫通しており、中心孔３２ｆは保持部３２ａの消しゴム３４を保持する部分と連通すると共に、芯タンク２０の中心孔とも連通している。   A center hole 32f extends through the male screw shaft 32b in the axial direction, and the center hole 32f communicates with a portion of the holding portion 32a that holds the eraser 34 and also communicates with the center hole of the core tank 20.

以上のように構成されるシャープペンシル１０において、消しゴム３４を繰出す操作を行なうときには、ノックキャップ３０を外筒１２に対して回転させると、ノックキャップ３０に対して相対回転不能となった棒状物受台３２と外筒１２に対して相対回転不能となった芯タンク２０との間で相対回転が発生し、棒状物受台３２の雄ねじ３２ｄは、芯タンク２０の雌ねじ２０ａに誘導されて、棒状物受台３２がノックキャップ３０内を軸方向に移動するので、消しゴム３４が繰出される。棒状物受台３２とノックキャップ３０とは相対回転不能であるため、消しゴム３４もノックキャップ３０と相対回転せずに、ノックキャップ３０に対して直線的に繰出されることとなる。これにより操作効率を良好にすることができる。   In the mechanical pencil 10 configured as described above, when the eraser 34 is fed out, when the knock cap 30 is rotated with respect to the outer cylinder 12, the rod-shaped object that is not rotatable relative to the knock cap 30. Relative rotation occurs between the cradle 32 and the core tank 20 that has become unable to rotate relative to the outer cylinder 12, and the male thread 32d of the rod-shaped object cradle 32 is guided to the female thread 20a of the core tank 20, Since the rod-shaped object receiving base 32 moves in the knock cap 30 in the axial direction, the eraser 34 is fed out. Since the rod-shaped object receiving base 32 and the knock cap 30 cannot be rotated relative to each other, the eraser 34 is also fed out linearly with respect to the knock cap 30 without rotating relative to the knock cap 30. Thereby, the operation efficiency can be improved.

芯を繰出す操作を行なうときには、ノックキャップ３０を外筒１２に対してノックすると、ノックキャップ３０に連結されている芯タンク２０が前進して、芯が繰出される。   When performing the operation of extending the lead, if the knock cap 30 is knocked with respect to the outer cylinder 12, the lead tank 20 connected to the knock cap 30 moves forward and the lead is paid out.

また、芯を補充する操作を行なうときには、消しゴム３４を棒状物受台３２から取り外すことにより、棒状物受台３２の中心孔３２ｆが芯タンク２０と連通するので、芯を棒状物受台３２の中心を通して芯タンク２０へと補充することができるようになる。この消しゴム３４と棒状物受台３２との着脱を容易にするために、棒状物受台３２の保持部３２ａの消しゴム３４の保持力は強すぎないようになっているとよい。弱い保持力であっても、消しゴム３４の繰出しを行なう際に、消しゴム３４がノックキャップ３０から受ける仕事が小さいため、問題となることはない。   When performing the operation of replenishing the core, the center hole 32f of the rod-shaped object receiving base 32 communicates with the core tank 20 by removing the eraser 34 from the bar-shaped object receiving base 32. The lead tank 20 can be replenished through the center. In order to facilitate attachment / detachment of the eraser 34 and the rod-shaped object receiving base 32, it is preferable that the holding force of the eraser 34 of the holding portion 32a of the rod-shaped object receiving base 32 is not too strong. Even if the holding force is weak, there is no problem because the eraser 34 receives a small amount of work from the knock cap 30 when the eraser 34 is fed.

このように以上の実施形態では、少ない部品点数で構成されており、これにより低コストで製造することができる。但し、上記実施形態において、単一の部材で構成されていた部材を、複数部材で構成することも可能であり、逆に複数部材で構成された部材を単一の部材を構成することも可能である。   Thus, in the above embodiment, it is comprised by the small number of parts, and can be manufactured at low cost by this. However, in the above-described embodiment, a member constituted by a single member can be constituted by a plurality of members, and conversely, a member constituted by a plurality of members can be constituted by a single member. It is.

また、上記実施形態は筆記具としてシャープペンシルを例にとって説明したが、これに限るものではなく、ボールペン等の任意の筆記具に適用することが可能である。また、棒状物としては、消しゴムに限らず、筆記芯、修正棒、蛍光芯等の任意の棒状物とすることが可能である。   Moreover, although the said embodiment demonstrated the mechanical pencil as an example as a writing instrument, it is not restricted to this, It is possible to apply to arbitrary writing instruments, such as a ball-point pen. Further, the rod-shaped object is not limited to the eraser, and any rod-shaped object such as a writing core, a correction rod, and a fluorescent core can be used.

本発明の実施形態にかかるシャープペンシルの全体縦断面図である。1 is an overall longitudinal sectional view of a mechanical pencil according to an embodiment of the present invention. 芯タンク及び棒状物繰出し機構と、外筒との関係を表す分解斜視図である。It is a disassembled perspective view showing the relationship between a lead tank and a rod-shaped object feeding mechanism and an outer cylinder. 図１の３−３線に沿って見た断面図である。It is sectional drawing seen along the 3-3 line of FIG. 芯タンクの後端部の縦断面図である。It is a longitudinal cross-sectional view of the rear end part of a lead tank. 棒状物受台の斜視図である。It is a perspective view of a rod-shaped object receiving stand. 図１の６−６線に沿って見た断面図（但し、クリップは省略）である。FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. 1 (however, clips are omitted).

符号の説明Explanation of symbols

１０ シャープペンシル（筆記具）
１２ 外筒
１４ 芯送出し機構（筆記軸体）
１６ 棒状物繰出し機構
２０ 芯タンク
２０ａ 雌ねじ
３０ ノックキャップ（後筒）
３０ｂ 縦溝
３２ 棒状物受台
３２ａ 保持部
３２ｄ 雄ねじ
３４ 消しゴム（棒状物） 10 Mechanical pencil (writing instrument)
12 Outer cylinder 14 Core feed mechanism (writing shaft)
16 Rod-like object feeding mechanism 20 core tank 20a female thread 30 knock cap (rear cylinder)
30b Longitudinal groove 32 Bar-shaped object receiving base 32a Holding part 32d Male screw 34 Eraser (bar-shaped object)

Claims (4)

外筒と、外筒内に配設される筆記軸体と、筆記軸体の後部に連結された棒状物繰出し機構と、を備えた筆記具において、
筆記軸体は、内周面に雌ねじが形成された部分を有し、該部分は外筒と相対回転不能となっており、
棒状物繰出し機構は、前記筆記軸体に相対回転可能に連結された後筒と、該後筒内を相対回転不能に且つ軸方向に摺動可能となり棒状物を保持する棒状物受台と、を備えており、棒状物受台には、前記筆記軸体の雌ねじに螺合する雄ねじが一体に形成されることを特徴とする棒状物繰出し機構を備えた筆記具。 In a writing instrument comprising an outer cylinder, a writing shaft disposed in the outer cylinder, and a rod-like object feeding mechanism connected to the rear portion of the writing shaft,
The writing shaft body has a portion in which an internal thread is formed on the inner peripheral surface, and the portion cannot rotate relative to the outer cylinder.
A rod-shaped object feeding mechanism includes a rear cylinder coupled to the writing shaft body so as to be relatively rotatable, a rod-shaped object cradle that is slidable in the axial direction so as not to be relatively rotatable within the rear cylinder, and holds the rod-shaped object; A writing instrument provided with a rod-shaped object feeding mechanism, wherein the rod-shaped object receiving base is integrally formed with a male screw that is screwed into the female thread of the writing shaft body. 前記棒状物受台は棒状物を保持する保持部を備えており、該保持部は、前記後筒の内周面に形成された縦溝に摺動可能に嵌合することを特徴とする請求項１記載の棒状物繰出し機構を備えた筆記具。   The rod-shaped object pedestal includes a holding part for holding a bar-shaped object, and the holding part is slidably fitted in a longitudinal groove formed on an inner peripheral surface of the rear cylinder. A writing instrument provided with the stick-like object feeding mechanism according to Item 1. 棒状物受台の先端部には前記雄ねじが形成されていない部分が設けられており、該雄ねじが形成されていない部分にはスリットが形成されることを特徴とする請求項１または２記載の棒状物繰出し機構を備えた筆記具。   The tip of the rod-shaped object cradle is provided with a portion where the male screw is not formed, and a portion where the male screw is not formed is formed with a slit. Writing instrument with a stick-shaped object feeding mechanism. 前記棒状物受台には、筆記軸体の中心孔と連通する中心孔が貫通して形成されることを特徴とする請求項１ないし３のいずれか１項に記載の棒状物繰出し機構を備えた筆記具。   4. The bar-shaped object receiving mechanism according to claim 1, wherein a center hole communicating with the center hole of the writing shaft body is formed through the bar-shaped object receiving base. Writing instrument.
JP2004128836A 2004-04-23 2004-04-23 Writing instrument equipped with bar-shaped feeding out mechanism Withdrawn JP2005305932A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004128836A JP2005305932A (en) 2004-04-23 2004-04-23 Writing instrument equipped with bar-shaped feeding out mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004128836A JP2005305932A (en) 2004-04-23 2004-04-23 Writing instrument equipped with bar-shaped feeding out mechanism

Publications (1)

Publication Number Publication Date
JP2005305932A true JP2005305932A (en) 2005-11-04

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015042480A (en) * 2013-07-25 2015-03-05 ミクロ株式会社 Mechanical pencil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015042480A (en) * 2013-07-25 2015-03-05 ミクロ株式会社 Mechanical pencil

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