JP2018089868A - Shake-out type mechanical pencil - Google Patents

Shake-out type mechanical pencil Download PDF

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JP2018089868A
JP2018089868A JP2016235735A JP2016235735A JP2018089868A JP 2018089868 A JP2018089868 A JP 2018089868A JP 2016235735 A JP2016235735 A JP 2016235735A JP 2016235735 A JP2016235735 A JP 2016235735A JP 2018089868 A JP2018089868 A JP 2018089868A
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pressing member
knob
mechanical pencil
shaft
eraser
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JP6737697B2 (en
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英郎 大池
Hideo Oike
英郎 大池
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Pilot Corp
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Pilot Corp
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Abstract

PROBLEM TO BE SOLVED: To obtain a shake-out type mechanical pencil having a structure capable of using an eraser mounted in a pressing member by a simple assembly without using a return spring.SOLUTION: There is provided a shake-out type mechanical pencil 1 that pulls out a lead 8 by advancing a chuck 11 with inertial force of a weight body 16 generated by shaking a shaft 2, the shake-out type mechanical pencil 1 is structured such that a pressing member 6 into which an eraser 5 is inserted is arranged behind a lead tank 15, an elastic tongue piece 6b having a free end 6a anteriorly is provided in the pressing member 6, the free end 6a abutting on an inner step 4g provided on an inner surface of the shaft 2, a knob 7 coating the eraser 5 is mounted outside the pressing member 6, thereby holding an outer surface 6e of the elastic tongue piece 6b with an inner surface 7a of the knob 7 to allow advancement of the pressing member 6 with respect to the shaft 2, and the knob 7 is removed from the pressing member 6, thereby causing the free end 6a of the elastic tongue piece 6b to abut on the inner step 4g of the shaft 2 to prevent the advancement of the pressing member 6 with respect to the shaft 2.SELECTED DRAWING: Figure 3

Description

本発明は、重量体の慣性力によりチャックを前進させて芯を繰り出す振出式シャープペンシルに関するものである。   The present invention relates to a swing-out mechanical pencil that advances a chuck by an inertial force of a weight body and feeds a lead.

振出式シャープペンシルにおいては、重量体の慣性力でチャックを前進させる必要があることから、チャックを後方へ弾発するチャックスプリングの取付荷重は２００ｇ以下の弱い荷重で設定されることが多く、前記チャックにコネクタを介して連結された芯タンクの後方に配設した押圧部材へ装着された消しゴムを使用する際に、前記押圧部材が前進してノック操作が行われないようにするために、軸筒と押圧部材の間に３５０ｇ程度で張架されたリターンスプリングを配設すると共に、軸筒の係止段部に押圧部材の係合突起を係止可能に構成し、リターンスプリングにより後方へ付勢された押圧部材の係合突起を軸筒の係止段により係止するものが存在しており、例えば本件出願人が出願した特開２０１１−８３９８８号公報（特許文献１）にも開示されている。   In the swing-out mechanical pencil, the chuck needs to be moved forward by the inertial force of the heavy body. Therefore, the mounting load of the chuck spring that repels the chuck backward is often set at a weak load of 200 g or less. In order to prevent the pushing member from advancing and knocking when using an eraser attached to the pushing member disposed behind the lead tank connected to the connector through the connector, A return spring stretched about 350 g is disposed between the press member and the engaging projection of the press member can be locked to the locking step portion of the shaft cylinder, and is urged rearward by the return spring. For example, Japanese Patent Application Laid-Open No. 2011-83988 (patent document) filed by the applicant of the present application. It is also disclosed in).

特開２０１１−８３９８８号公報JP 2011-83988 A

前述の振出式シャープペンシルでは、リターンスプリングを必要とし、また軸筒の係止段部に押圧部材の係止突起を係止させるなど組み立てが複雑になることから、本発明では、前記リターンスプリングを用いることなく簡単な組み立てにより、押圧部材に装着された消しゴムを使用することができる構造の振出式シャープペンシルを得ることを目的とした。   In the above-described swing-out mechanical pencil, a return spring is required, and the assembly is complicated such as locking the locking projection of the pressing member to the locking step portion of the shaft tube. An object of the present invention is to obtain a swing-out mechanical pencil having a structure in which an eraser attached to a pressing member can be used by simple assembly without using it.

本発明は、
「軸筒を振ることにより生じる重量体の慣性力によりチャックを前進させて芯を繰り出す振出式シャープペンシルにおいて、芯タンクの後方に、消しゴムが挿着された押圧部材が配設され、前記押圧部材に、自由端を前方に有し当該自由端が前記軸筒の内面に設けた内段に当接する弾性舌片が設けられ、前記押圧部材の外方に、前記消しゴムを被覆するノブを装着することにより、前記ノブの内面で前記弾性舌片の外面を挟持して前記押圧部材を前記軸筒に対して前進可能とし、前記ノブを前記押圧部材から取り外すことにより、前記弾性舌片の自由端を前記軸筒の内段に当接させて前記押圧部材を前記軸筒に対して前進不能とする構造の振出式シャープペンシル。」である。 The present invention
“In a swing-out mechanical pencil that moves the chuck forward by the inertial force of the weight body generated by shaking the shaft cylinder and feeds the lead, a pressing member having an eraser inserted is disposed behind the lead tank, and the pressing member Further, an elastic tongue piece having a free end in front and abutting against an inner stage provided on the inner surface of the shaft cylinder is provided, and a knob that covers the eraser is mounted on the outer side of the pressing member. By holding the outer surface of the elastic tongue piece on the inner surface of the knob so that the pressing member can be advanced with respect to the shaft tube, and removing the knob from the pressing member, the free end of the elastic tongue piece Is a swing-out mechanical pencil having a structure in which the pressing member cannot be moved forward with respect to the shaft tube.

本発明によれば、通常、消しゴムを使用するために行われるノブの取り外しの操作によって押圧部材を前進不能にすることができ、また押圧部材の押動による芯の繰り出しのために行われるノブの装着によって押圧部材を前進可能にすることができる。   According to the present invention, it is possible to make the pressing member unable to move forward by the operation of removing the knob, which is usually performed in order to use the eraser, and for the knob performed for feeding the lead by pushing the pressing member. The pressing member can be advanced by mounting.

リターンスプリングを用いることなく簡単な組み立てにより、押圧部材に装着された消しゴムを使用することができる構造の振出式シャープペンシルを得ることができた。   By using a simple assembly without using a return spring, it was possible to obtain an oscillating mechanical pencil having a structure in which the eraser attached to the pressing member can be used.

本発明の振出式シャープペンシルの縦断面図でノブを装着した状態を示す図である。It is a figure which shows the state which mounted | wore the knob with the longitudinal cross-sectional view of the swing-out type mechanical pencil of this invention. 図１の要部拡大図である。It is a principal part enlarged view of FIG. 本発明の振出式シャープペンシルの縦断面図でノブを取り外した状態を示す図である。It is a figure which shows the state which removed the knob by the longitudinal cross-sectional view of the swing-out type mechanical pencil of this invention. 図３の要部拡大図である。It is a principal part enlarged view of FIG. 押圧部材及び消しゴムの図で、図５Ａは正面図であり、図５Ｂは側面図である。FIG. 5A is a front view and FIG. 5B is a side view of a pressing member and an eraser.

以下に、添付の図面を参照して本発明の実施例を詳細に説明する。本実施例においては筆記先端側を前方と表現し、その反対側を後方と表現する。尚、図中の同じ部材、同じ部品については、同じ符号としている。   Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, the writing tip side is expressed as front, and the opposite side is expressed as rear. In addition, the same code | symbol is used about the same member and the same components in a figure.

図１は本発明の振出式シャープペンシルの縦断面図でノブを装着した状態を示す図である。図２は図１の要部拡大図である。
シャープペンシル１は、軸筒２を、軸筒本体２０の前方に装着された口金３と、当該軸筒本体２０の後方に装着された尾筒４とで構成している。前記尾筒４はクリップ４ａを側面に形成してある。口金３は、軸筒２に対して着脱可能に螺合されている。尾筒４は、前方へ突出させた小径部４ｂを軸筒本体２０の後端開口部２０ａより挿通させ、当該小径部４ｂの中間部に形成した弾性片４ｃの後端にある突起４ｄを、前記軸筒本体２０の内面に形成した凹部２０ｂへ係止して、当該軸筒に対して前後動及び回動不能に固定してある。
詳細は後述するが、前記尾筒４に設けた貫通孔４ｅには、消しゴム５が挿着された押圧部材６が配設されており、押圧部材６にはノブ７が装着されている。 FIG. 1 is a longitudinal sectional view of a swing-out mechanical pencil according to the present invention showing a state in which a knob is mounted. FIG. 2 is an enlarged view of a main part of FIG.
In the mechanical pencil 1, the shaft cylinder 2 is configured by a base 3 attached to the front of the shaft cylinder main body 20 and a tail cylinder 4 attached to the rear of the shaft cylinder main body 20. The tail cylinder 4 has a clip 4a formed on the side surface. The base 3 is detachably screwed to the shaft cylinder 2. The tail cylinder 4 has a small-diameter portion 4b that protrudes forward and is inserted through the rear-end opening 20a of the shaft cylinder main body 20, and a protrusion 4d at the rear end of the elastic piece 4c that is formed at an intermediate portion of the small-diameter portion 4b. The shaft cylinder main body 20 is fixed to a concave portion 20b formed on the inner surface of the shaft cylinder main body 20 so as to be unable to move back and forth and rotate.
As will be described in detail later, a pressing member 6 into which an eraser 5 is inserted is disposed in the through hole 4 e provided in the tail cylinder 4, and a knob 7 is attached to the pressing member 6.

次に、図１及び図２を用いて、本実施例の芯繰出機構についての説明を行う。本実施例では、芯８を適宜の力で保持するゴム材からなる芯ホルダ９を前記口金３の先端部に挿着し、芯ホルダ９の後方位置において締めリング１０により当該芯８を後退しないように挟持するチャック１１を配設し、前記締めリング１０の後方位置においてチャックスプリング１２の弾発力を受ける連結筒１３の鍔部１３ａを前記口金３の内部に形成した段部３ａと前記軸筒本体２０の先端部２０ｃとで挟持させ、前記チャック１１の後部と係合させたコネクタ１４にて前記チャックスプリング１２の後端を当接させ、当該コネクタ１４の後方小径部１４ａが芯タンク１５の貫通孔１５ａに嵌着され、当該芯タンク１５の先端が当該コネクタ１４の鍔部１４ｂに当接するようにしてある。
また、前記軸筒本体２０と前記芯タンク１５との間に形成される空間部Ｋには、重量体１６を当該芯タンク１５の外周に対して遊嵌するよう配設してある。 Next, the lead feeding mechanism of the present embodiment will be described with reference to FIGS. 1 and 2. In this embodiment, a core holder 9 made of a rubber material that holds the core 8 with an appropriate force is inserted into the distal end portion of the base 3, and the core 8 is not retracted by the fastening ring 10 at a rear position of the core holder 9. The stepped portion 3a formed in the base 3 and the shaft are provided with a flange 13a of the connecting tube 13 that receives the elastic force of the chuck spring 12 at the rear position of the fastening ring 10 and is provided with a chuck 11 that is sandwiched in this manner. The rear end of the chuck spring 12 is brought into contact with the connector 14 that is held between the front end 20c of the cylinder body 20 and engaged with the rear portion of the chuck 11, and the rear small-diameter portion 14a of the connector 14 is connected to the core tank 15. The tip of the core tank 15 is in contact with the flange 14b of the connector 14.
A weight body 16 is disposed in the space K formed between the shaft cylinder body 20 and the core tank 15 so as to be loosely fitted to the outer periphery of the core tank 15.

本実施例のシャープペンシル１は、軸筒２を前後に振ることで、前記重量体１６が空間部Ｋ内を前方はコネクタ１４に当接するまで、後方は前記尾筒４の内面に形成した前方段部４ｆに当接するまで前後動し、重量体１６が前進した際には、当該重量体１６の慣性力でコネクタ１４とチャック１１および締めリング１０を前記チャックスプリング１２の弾発力に抗して前進させ、締めリング１０が前記口金３に形成した当接段部３ｂに当接してチャック１１を開放する迄の距離分だけ芯８を繰り出し、前記動作で繰り出された芯８は芯ホルダ９により一時的に保持され、前記重量体１６の慣性力の影響がなくなったコネクタ１４がチャックスプリング１２の弾発力で後退することにより、コネクタ１４に係合したチャック１１が後退し、再び締めリング１０がチャック１１を締めることで芯８を挟持して、当該芯８の突出状態を維持して筆記可能状態にできる構造である。
また、本実施例では図１に示す通り軸筒２の後方に前記ノブ７を配設しており、ノブ７を前進させることにより、当該ノブ７を装着した前記押圧部材６を前進させ、当該押圧部材６と連結された前記芯タンク１５及び前記コネクタ１４を前進させ、芯８の繰り出しを行うことも可能である。 The mechanical pencil 1 of the present embodiment is formed by swinging the shaft cylinder 2 back and forth so that the weight body 16 is formed on the inner surface of the tail cylinder 4 until the weight body 16 abuts the connector 14 on the front side in the space K. When the weight body 16 moves forward and backward until it abuts against the stepped portion 4f and the weight body 16 moves forward, the inertia force of the weight body 16 opposes the connector 14, the chuck 11 and the fastening ring 10 against the elastic force of the chuck spring 12. The lead 8 is fed out by a distance until the fastening ring 10 comes into contact with the contact step 3b formed on the base 3 and the chuck 11 is released. When the connector 14 that is temporarily held by the weight body 16 and is no longer affected by the inertial force of the weight body 16 is retracted by the elastic force of the chuck spring 12, the chuck 11 engaged with the connector 14 is retracted, and again. Because the ring 10 is held between the core 8 by tightening the chuck 11, a structure that can be writable state while maintaining the projected state of the core 8.
Further, in the present embodiment, as shown in FIG. 1, the knob 7 is disposed behind the shaft cylinder 2, and by moving the knob 7 forward, the pressing member 6 to which the knob 7 is attached is advanced, It is also possible to advance the lead 8 by moving the lead tank 15 and the connector 14 connected to the pressing member 6 forward.

次に、図３〜図５を用いて、ノブを取り外した状態についての説明を行う。
図３は本発明の振出式シャープペンシルの縦断面図でノブを取り外した状態を示す図である。図４は図３の要部拡大図である。図５は押圧部材及び消しゴムの図で、図５Ａは正面図であり、図５Ｂは側面図である。
図に示す通り、本実施例の押圧部材６の側面には、自由端６ａを前方に有した弾性舌片６ｂが設けられており、前記ノブ（図２参照）を取り外すことにより、当該自由端６ａの外方へ突出された突起部６ｃが、前記尾筒４の内面に形成した内段４ｇに当接して前記押圧部材６を前進不能にさせることができる。
したがって、ノブ（図２参照）を取り外すだけで、前記押圧部材６が前進することによるノック操作を行えなくすることができ、当該押圧部材６の開口部６ｆに嵌着された消しゴム５に力を掛けて使用しても、芯８が繰り出されることはない。
さらに、本実施例では、押圧部材６の前方に形成した前方小径部６ｄが、前記芯タンク１５の貫通孔１５ａに嵌着されており、当該押圧部材６と前記芯タンク１５と前記コネクタ１４とが一体になっていることから、仮に軸筒２が振られて重量体１６がコネクタ１４に当たったとしても、押圧部材６が前進できないため芯タンク１５とコネクタ１４も前進せず、芯８が繰り出されることはない。 Next, the state where the knob is removed will be described with reference to FIGS.
FIG. 3 is a longitudinal sectional view of the swing-out mechanical pencil of the present invention, and shows a state where the knob is removed. 4 is an enlarged view of a main part of FIG. FIG. 5 is a view of the pressing member and the eraser, FIG. 5A is a front view, and FIG. 5B is a side view.
As shown in the figure, an elastic tongue piece 6b having a free end 6a on the front side is provided on the side surface of the pressing member 6 of the present embodiment, and the free end is removed by removing the knob (see FIG. 2). The protruding portion 6c protruding outward of 6a can abut against an inner step 4g formed on the inner surface of the tail cylinder 4 so that the pressing member 6 cannot be advanced.
Therefore, by simply removing the knob (see FIG. 2), it is possible to disable the knocking operation by the advancement of the pressing member 6, and force the eraser 5 fitted to the opening 6f of the pressing member 6. Even if it is used while being hung, the lead 8 is not drawn out.
Furthermore, in this embodiment, a front small diameter portion 6d formed in front of the pressing member 6 is fitted into the through hole 15a of the core tank 15, and the pressing member 6, the core tank 15, the connector 14, and the like. Therefore, even if the shaft cylinder 2 is shaken and the weight body 16 hits the connector 14, the pressing member 6 cannot advance, so the core tank 15 and the connector 14 do not advance, and the core 8 It will not be paid out.

また、図１及び図２に示されたように、前記押圧部材６の外方に前記消しゴム５を被覆するノブ７を再び装着することによって、当該ノブ７の内面７ａで前記押圧部材６の弾性舌片６ｂの外面６ｅを挟持して、当該弾性舌片６ｂの突起部６ｃを窄めて前記尾筒４の内段４ｇから離間させ、当該押圧部材６を前記軸筒２に対して前進可能とすることができ、前述の通り、ノブ７を前進させることで、芯８の繰り出しを行うことが可能となる。   Also, as shown in FIGS. 1 and 2, by reattaching the knob 7 covering the eraser 5 to the outside of the pressing member 6, the inner surface 7 a of the knob 7 can elastically press the pressing member 6. The outer surface 6e of the tongue piece 6b is pinched, the protrusion 6c of the elastic tongue piece 6b is narrowed and separated from the inner stage 4g of the tail cylinder 4, and the pressing member 6 can be advanced with respect to the shaft cylinder 2. As described above, the lead 8 can be extended by moving the knob 7 forward.

１…シャープペンシル、
２…軸筒、
２０…軸筒本体、２０ａ…後端開口部、２０ｂ…凹部、２０ｃ…先端部、
３…口金、３ａ…段部、３ｂ…当接段部、
４…尾筒、４ａ…クリップ、４ｂ…小径部、４ｃ…弾性片、４ｄ…突起、４ｅ…貫通孔、４ｆ…前方段部、４ｇ…内段、
５…消しゴム、
６…押圧部材、６ａ…自由端、６ｂ…弾性舌片、６ｃ…突起部、６ｄ…前方小径部、６ｅ…外面、６ｆ…開口部、
７…ノブ、７ａ…内面、
８…芯、
９…芯ホルダ、１０…締めリング、
１１…チャック、
１２…チャックスプリング、
１３…連結筒、１３ａ…鍔部、
１４…コネクタ、１４ａ…後方小径部、１４ｂ…鍔部、
１５…芯タンク、１５ａ…貫通孔、
１６…重量体、
Ｋ…空間部。 1 ... mechanical pencil,
2 ... shaft tube,
20 ... Shaft cylinder body, 20a ... Rear end opening, 20b ... Recess, 20c ... Front end,
3 ... base, 3a ... step, 3b ... contact step,
4 ... tail tube, 4a ... clip, 4b ... small diameter part, 4c ... elastic piece, 4d ... projection, 4e ... through hole, 4f ... front step part, 4g ... inner stage,
5 ... Eraser,
6 ... pressing member, 6a ... free end, 6b ... elastic tongue, 6c ... projection, 6d ... front small diameter part, 6e ... outer surface, 6f ... opening,
7 ... Knob, 7a ... Inside,
8 ... Core
9 ... Core holder, 10 ... Clamp ring,
11 ... Chuck,
12 ... Chuck spring,
13 ... connecting cylinder, 13a ... buttocks,
14 ... Connector, 14a ... Back small diameter part, 14b ... Gutter part,
15 ... core tank, 15a ... through hole,
16 ... heavy body,
K ... Space part.

Claims (1)

軸筒を振ることにより生じる重量体の慣性力によりチャックを前進させて芯を繰り出す振出式シャープペンシルにおいて、芯タンクの後方に、消しゴムが挿着された押圧部材が配設され、前記押圧部材に、自由端を前方に有し当該自由端が前記軸筒の内面に設けた内段に当接する弾性舌片が設けられ、前記押圧部材の外方に、前記消しゴムを被覆するノブを装着することにより、前記ノブの内面で前記弾性舌片の外面を挟持して前記押圧部材を前記軸筒に対して前進可能とし、前記ノブを前記押圧部材から取り外すことにより、前記弾性舌片の自由端を前記軸筒の内段に当接させて前記押圧部材を前記軸筒に対して前進不能とする構造の振出式シャープペンシル。 In a swing-out mechanical pencil that feeds a lead by advancing the chuck by the inertial force of the weight body generated by shaking the shaft cylinder, a pressing member having an eraser inserted is disposed behind the lead tank, and the pressing member An elastic tongue piece that has a free end in front and abuts against an inner stage provided on the inner surface of the shaft cylinder, and a knob that covers the eraser is mounted on the outer side of the pressing member. By holding the outer surface of the elastic tongue piece on the inner surface of the knob so that the pressing member can be advanced with respect to the shaft tube, and removing the knob from the pressing member, the free end of the elastic tongue piece is A swing-out mechanical pencil having a structure in which the pressing member cannot be moved forward with respect to the shaft tube by abutting against an inner stage of the shaft tube.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021041544A (en) * 2019-09-06 2021-03-18 株式会社パイロットコーポレーション mechanical pencil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59179088U (en) * 1983-05-19 1984-11-30 株式会社　サクラクレパス Knotsuku style pencil
JPS61192889U (en) * 1985-05-27 1986-12-01
JPH065986U (en) * 1992-06-30 1994-01-25 三菱鉛筆株式会社 mechanical pencil
JPH0667085U (en) * 1993-03-03 1994-09-20 三菱鉛筆株式会社 Writing instrument with seal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59179088U (en) * 1983-05-19 1984-11-30 株式会社　サクラクレパス Knotsuku style pencil
JPS61192889U (en) * 1985-05-27 1986-12-01
JPH065986U (en) * 1992-06-30 1994-01-25 三菱鉛筆株式会社 mechanical pencil
JPH0667085U (en) * 1993-03-03 1994-09-20 三菱鉛筆株式会社 Writing instrument with seal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021041544A (en) * 2019-09-06 2021-03-18 株式会社パイロットコーポレーション mechanical pencil
JP7328836B2 (en) 2019-09-06 2023-08-17 株式会社パイロットコーポレーション mechanical pencil

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