JP4566717B2 - mechanical pencil - Google Patents

mechanical pencil Download PDF

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Publication number
JP4566717B2
JP4566717B2 JP2004348561A JP2004348561A JP4566717B2 JP 4566717 B2 JP4566717 B2 JP 4566717B2 JP 2004348561 A JP2004348561 A JP 2004348561A JP 2004348561 A JP2004348561 A JP 2004348561A JP 4566717 B2 JP4566717 B2 JP 4566717B2
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Japan
Prior art keywords
lead
core
holder
mechanical pencil
base
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JP2006150898A (en
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幹夫 小島
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Pilot Corp KK
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Pilot Corp KK
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  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Description

本発明は、口金の前部内側に芯ホルダーを設けたシャープペンシルに関する。   The present invention relates to a mechanical pencil provided with a core holder inside a front portion of a base.

従来、口金の前部内側に２色成形あるいはインサート成形により弾性保持部を設けたシャープペンシルが知られている。この弾性保持部には、芯に摩擦的に接触して芯の移動に抵抗を与えることができる内径を有する抵抗部（１４）を周方向の複数個所に突設して形成されている。（特許文献１参照）
特開２００１−２８７４９５号公報（図３） 2. Description of the Related Art Conventionally, a mechanical pencil is known in which an elastic holding portion is provided by two-color molding or insert molding inside a front portion of a base. The elastic holding portion is formed by protruding resistance portions (14) having an inner diameter capable of frictionally contacting the core and imparting resistance to the movement of the core at a plurality of locations in the circumferential direction. (See Patent Document 1)
JP 2001-287495 A (FIG. 3)

上記したシャープペンシルは、短くなった芯を次の芯で押しながら筆記を行うと短くなった芯が回転してしまい、大変筆記しにくいものであった。   The above-mentioned mechanical pencil is very difficult to write when writing while pressing the shortened lead with the next lead.

本発明は、チャックを前進させることにより芯を繰り出すシャープペンシルにおいて、口金の前部内側に芯を適度の力で保持する芯ホルダーを２色成形あるいはインサート成形により構成し、この芯ホルダーを軟質物質で構成するとともに、芯ホルダーの前部に前方に突出する芯保持部を円周方向略等間隔に形成し、その内面を断面Ｖ字形に構成したことを第１の要旨とする。 The present invention relates to a mechanical pencil that feeds a lead by advancing a chuck, wherein a lead holder for holding a lead with an appropriate force is formed inside the front part of the base by two-color molding or insert molding, and the lead holder is made of a soft material. The first gist is that the core holding portions protruding forward are formed at substantially equal intervals in the circumferential direction at the front portion of the core holder, and the inner surface thereof is formed in a V-shaped cross section.

また、芯ホルダーの芯保持部外面を口金の内面に密着して構成したことを第２の要旨とする。 A second gist is that the outer surface of the core holding portion of the core holder is configured to be in close contact with the inner surface of the base.

本発明のシャープペンシルは、短くなった芯を次の芯で押して筆記を行った場合でも、芯ホルダーに保持された短い芯が回転する恐れがなく、また、芯は芯ホルダー内を確実に前進できるものである。したがって、簡単な構造にもかかわらず残芯が少なくできる利点がある。   The mechanical pencil of the present invention has no fear that the short lead held by the lead holder will rotate even if the shortened lead is pushed by the next lead and writing is performed, and the lead will surely advance in the lead holder. It can be done. Therefore, there is an advantage that the remaining core can be reduced despite the simple structure.

芯ホルダーを軟質物質で構成するとともに、芯ホルダーの芯保持部を円周方向に複数構成し、その内面を断面Ｖ字形に構成することにより、短くなった芯を次の芯で押して筆記しても短い芯が回転することなく筆記することができるシャープペンシルを実現した。   The core holder is made of a soft material, and the core holder of the core holder is composed of a plurality of parts in the circumferential direction, and the inner surface is formed in a V-shaped cross section, so that the shortened core is pushed by the next core and written. A mechanical pencil that can be written without rotating the short lead.

図１、図２および図３により本発明の実施例１のシャープペンシルを説明する。尚、図１の左側を前方とし、右側を後方とする。先ず、合成樹脂製の口金１の前部に開口孔１Ａを相対させて形成する。更に、口金１の内面には長手方向に伸びたリブ１Ｂを等間隔に６個形成し、このリブ１Ｂに固定具２を挟持する段部１Ｃと、締具３を受け止める係止段１Ｄを形成する。この口金１と、軟質物質からなる芯ホルダー４を２色成形により構成する。芯ホルダー４は口金１の開口孔１Ａを通して成形され、芯ホルダー４の前部には前方に突出する芯保持部４Ａが円周方向等間隔に４個形成される。この芯保持部４Ａの外面は口金１の前部内面１Ｅに密着して構成される。しかも、前記芯保持部４Ａの内面４Ｂは断面Ｖ字形に構成され、この芯保持部４Ａで芯５を保持した時、Ｖ字形の内面４Ｂが両側に広がって芯５との摩擦力が増加し、芯５が回転しにくい構造になっている。   The mechanical pencil according to the first embodiment of the present invention will be described with reference to FIGS. In addition, let the left side of FIG. 1 be the front, and let the right side be back. First, the opening hole 1A is formed to be opposed to the front portion of the synthetic resin base 1. Further, six ribs 1B extending in the longitudinal direction are formed on the inner surface of the base 1 at equal intervals, and a step portion 1C for sandwiching the fixture 2 and a locking step 1D for receiving the fastener 3 are formed on the rib 1B. To do. The base 1 and the core holder 4 made of a soft material are formed by two-color molding. The core holder 4 is formed through the opening hole 1A of the base 1, and four core holding portions 4A protruding forward are formed at the front portion of the core holder 4 at equal intervals in the circumferential direction. The outer surface of the core holding portion 4A is configured to be in close contact with the front inner surface 1E of the base 1. Moreover, the inner surface 4B of the core holding portion 4A has a V-shaped cross section, and when the core 5 is held by the core holding portion 4A, the V-shaped inner surface 4B spreads on both sides and the frictional force with the core 5 increases. The core 5 has a structure that is difficult to rotate.

次に、チャック６、締具３、固定具２、スプリング７および芯タンク８からなる機構部を軸筒９の前方より挿入し、軸筒９の前部に固定具２の後部２Ａを挿入する。この軸筒９の雄ネジ部９Ａに前記口金１の雌ネジ部１Ｆを螺合し、リブ１Ｂの段部１Ｃと軸筒９の前端により固定具２の外鍔２Ｂを挟持してノック式のシャープペンシルを構成する。   Next, a mechanism portion including the chuck 6, the fastener 3, the fixture 2, the spring 7 and the core tank 8 is inserted from the front of the shaft tube 9, and the rear portion 2 </ b> A of the fixture 2 is inserted into the front portion of the shaft tube 9. . The female screw portion 1F of the base 1 is screwed into the male screw portion 9A of the shaft tube 9, and the outer flange 2B of the fixture 2 is sandwiched between the step portion 1C of the rib 1B and the front end of the shaft tube 9, and a knock type Make up a mechanical pencil.

以上説明したシャープペンシルは、ノックによりチャック６を前進させて芯５を繰り出すと、締具３がリブ１Ｂの係止段１Ｄに当接されてチャック６の頭部６Ａから締具３を外すとともに、チャック６の前端が芯ホルダー４の後端に当接されてチャック６が停止される。そして、筆記中の芯５が短くなった場合には、次の芯５に押されることにより短くなった芯５で筆記を行うことができる。しかも、短くなった芯５は芯ホルダー４の芯保持部４Ａにより保持されるので、回転することなく筆記が行われる。したがって、残芯の長さを非常に短くすることができる。   In the mechanical pencil described above, when the chuck 6 is advanced by knocking and the core 5 is drawn out, the fastener 3 is brought into contact with the locking step 1D of the rib 1B to remove the fastener 3 from the head 6A of the chuck 6. The front end of the chuck 6 is brought into contact with the rear end of the lead holder 4 and the chuck 6 is stopped. When the lead 5 being written is shortened, writing can be performed with the lead 5 shortened by being pushed by the next lead 5. Moreover, since the shortened core 5 is held by the core holder 4A of the core holder 4, writing is performed without rotating. Therefore, the length of the remaining core can be made very short.

芯ホルダーの芯保持部が芯を保持する時、断面Ｖ字形の内面が両側に広がるので、短い芯でも回転することなく筆記でき、残芯の長さが非常に短くなるシャープペンシルに適用できる。   When the lead holder of the lead holder holds the lead, the inner surface of the V-shaped cross section spreads on both sides, so that even a short lead can be written without rotating, and it can be applied to a mechanical pencil in which the length of the remaining lead is very short.

本発明の実施例１のシャープペンシルを示す主要部断面図である。（実施例１）It is principal part sectional drawing which shows the mechanical pencil of Example 1 of this invention. Example 1 図１のＡ−Ａ線を示す拡大断面図である。（実施例１）It is an expanded sectional view which shows the AA line of FIG. Example 1 図１のＢ−Ｂ線を示す拡大断面図である。（実施例１）It is an expanded sectional view which shows the BB line of FIG. Example 1

１ 口金
４ 芯ホルダー
４Ａ 芯ホルダー４の芯保持部
４Ｂ 芯ホルダー４の内面
５ 芯
６ チャック 1 Base 4 Core Holder 4A Core Holder 4 Core Holder 4B Inner Surface of Core Holder 4 5 Core 6 Chuck

Claims (2)

チャックを前進させることにより芯を繰り出すシャープペンシルにおいて、口金の前部内側に芯を適度の力で保持する芯ホルダーを２色成形あるいはインサート成形により構成し、この芯ホルダーを軟質物質で構成するとともに、芯ホルダーの前部に前方に突出する芯保持部を円周方向略等間隔に形成し、その内面を断面Ｖ字形に構成したことを特徴とするシャープペンシル。 In the mechanical pencil that feeds the lead by advancing the chuck, the lead holder that holds the lead with an appropriate force inside the front part of the base is formed by two-color molding or insert molding, and this lead holder is made of a soft material. A mechanical pencil characterized in that a lead holding part protruding forward is formed at a front part of the lead holder at substantially equal intervals in the circumferential direction, and its inner surface is formed in a V-shaped cross section. 芯ホルダーの芯保持部外面を口金の内面に密着して構成したことを特徴とする請求項１記載のシャープペンシル。 2. The mechanical pencil according to claim 1 , wherein an outer surface of the core holding portion of the core holder is formed in close contact with an inner surface of the base.
JP2004348561A 2004-12-01 2004-12-01 mechanical pencil Expired - Fee Related JP4566717B2 (en)

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JP4566717B2 true JP4566717B2 (en) 2010-10-20

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6271136B2 (en) * 2013-03-12 2018-01-31 有限会社中山金属工業 Lead core insertion holding structure for mechanical pencils

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5523737U (en) * 1978-08-01 1980-02-15
JPS5716390U (en) * 1980-07-02 1982-01-27
JPS59110680U (en) * 1983-01-18 1984-07-26 三菱鉛筆株式会社 Knotsuku style pencil
JPS60134676U (en) * 1984-02-17 1985-09-07 セーラー万年筆株式会社 Notsuku style pencil
JPH0691689A (en) * 1992-06-26 1994-04-05 Okashiro Kanagata Kasei Kk Method for processing inside surface of hollow member
JP2001287495A (en) * 2000-04-10 2001-10-16 Micro Kk Writing instrument
JP2002356091A (en) * 2001-05-31 2002-12-10 Pentel Corp Mechanical pencil
JP2003011582A (en) * 2001-06-29 2003-01-15 Zebra Pen Corp Mechanical pencil
JP2003054184A (en) * 2001-08-13 2003-02-26 Kotobuki:Kk Mechanical pencil

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5523737U (en) * 1978-08-01 1980-02-15
JPS5716390U (en) * 1980-07-02 1982-01-27
JPS59110680U (en) * 1983-01-18 1984-07-26 三菱鉛筆株式会社 Knotsuku style pencil
JPS60134676U (en) * 1984-02-17 1985-09-07 セーラー万年筆株式会社 Notsuku style pencil
JPH0691689A (en) * 1992-06-26 1994-04-05 Okashiro Kanagata Kasei Kk Method for processing inside surface of hollow member
JP2001287495A (en) * 2000-04-10 2001-10-16 Micro Kk Writing instrument
JP2002356091A (en) * 2001-05-31 2002-12-10 Pentel Corp Mechanical pencil
JP2003011582A (en) * 2001-06-29 2003-01-15 Zebra Pen Corp Mechanical pencil
JP2003054184A (en) * 2001-08-13 2003-02-26 Kotobuki:Kk Mechanical pencil

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