JP2005231148A - Mechanical pencil - Google Patents

Mechanical pencil Download PDF

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Publication number
JP2005231148A
JP2005231148A JP2004042012A JP2004042012A JP2005231148A JP 2005231148 A JP2005231148 A JP 2005231148A JP 2004042012 A JP2004042012 A JP 2004042012A JP 2004042012 A JP2004042012 A JP 2004042012A JP 2005231148 A JP2005231148 A JP 2005231148A
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shaft
cap
core
main body
mechanical pencil
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Hidetaka Ota
英孝 太田
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Tombow Pencil Co Ltd
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Tombow Pencil Co Ltd
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Priority to JP2004042012A priority Critical patent/JP2005231148A/en
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  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mechanical pencil which need not remove an eraser cap or an eraser holder and therefore, can prevent it from being lost, when a lead of the mechanical pencil is replenished and also realizes the simple replenishment of the lead by a snappy one-touch operation. <P>SOLUTION: The mechanical pencil 1 has a lead insertion part 4 comprising an opening 12 for lead insertion and a lid part 13, formed on the outer surface 3 of a barrel main body 2 of the pencil 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、シャープペンシルに関し、詳しくは、芯の補充作業を簡単に行い得るようにしたシャープペンシルに関する。   The present invention relates to a mechanical pencil, and more particularly to a mechanical pencil that can be easily refilled with a lead.

シャープペンシルは、内部の芯タンクに複数本の芯を格納し、芯送り機構で一本ずつ芯を送出して使用し、格納した芯を使い切ると、補充するようになっている。
芯タンクの後端部は開口され、この開口内に消しゴムを保持した消しゴムホルダーが嵌入され、さらに消しゴムキャップが着脱自在に被着されている(たとえば、特許文献1)。
芯を補充する際には、先ず消しゴムキャップを取り外し、次いで消しゴムホルダーを取り外して、芯を芯タンクの後端部開口から補充している。
しかし、この補充作業は、片手でシャープペンシルの軸本体を持ち、他方の手で芯を持って行われるため、消しゴムホルダーおよび消しゴムキャップを机上等に置かなければならず、それらが転げ落ちて紛失してしまう場合がある。紛失した場合は、芯タンクの後端部開口が開放されたままとなり、そのままでは芯が飛び出す虞があり、使用困難となる。
特公平6−4359号公報(2頁右欄15〜18行目、図1)
The mechanical pencil stores a plurality of cores in an internal core tank, feeds the cores one by one by a core feeding mechanism, and replenishes them when the stored cores are used up.
A rear end portion of the lead tank is opened, and an eraser holder holding an eraser is inserted into the opening, and an eraser cap is detachably attached (for example, Patent Document 1).
When refilling the lead, the eraser cap is first removed, then the eraser holder is removed, and the lead is replenished from the rear end opening of the lead tank.
However, this replenishment work is performed with the mechanical pencil shaft body with one hand and the core with the other hand, so the eraser holder and eraser cap must be placed on a desk, etc. May end up. If it is lost, the rear end opening of the lead tank remains open, and the lead may jump out as it is, making it difficult to use.
Japanese Examined Patent Publication No. 6-4359 (page 2, right column, lines 15-18, FIG. 1)

本発明は、前記の現状に鑑み、芯を補充する際に、消しゴムキャップや消しゴムホルダーを取り外す必要をなくして、これらの紛失を防止するとともに、消しゴムキャップを取り外して机上に置き、次いで、消しゴムホルダーを取り外して机上に置くという二重の手数を省き、ワンタッチで簡単に芯の補充作業を行い得るシャープペンシルを提供することを目的とする。   In view of the above situation, the present invention eliminates the need to remove the eraser cap and eraser holder when replenishing the core, prevents them from being lost, removes the eraser cap and places it on the desk, and then eraser holder The purpose is to provide a mechanical pencil that can be easily refilled with a single touch, eliminating the double labor of removing and placing it on the desk.

本発明によると上記課題は、次のようにして解決される。
(1) 軸本体の外側面上に、開閉可能とした芯挿入部を設ける。
According to the present invention, the above problem is solved as follows.
(1) A core insertion portion that can be opened and closed is provided on the outer surface of the shaft body.

(2) 上記(1)項において、前記芯挿入部を、軸本体の外側面上に設けた芯挿入用開口と、軸本体の軸線と直交する軸回りに回動して前記芯挿入用開口を開閉する蓋部とより形成し、かつ前記蓋部を、前記芯挿入用開口を閉じる向きにばねによって付勢する。   (2) In the above paragraph (1), the lead insertion portion is rotated about a lead insertion opening provided on the outer surface of the shaft main body and an axis perpendicular to the axis of the shaft main body, thereby opening the lead insertion opening. And a lid portion that opens and closes the lid, and the lid portion is biased by a spring in a direction to close the opening for core insertion.

(3) 上記(2)項において、クリップを、前記蓋部の回動軸と同じ軸回りに回動し得るように軸本体に取り付けるとともに、蓋部を付勢するばねをもって、同時にクリップの前端を、軸本体の外側面上に押圧させるようにする。   (3) In the above item (2), the clip is attached to the shaft body so that it can be rotated about the same axis as the rotation axis of the lid portion, and a spring for biasing the lid portion is provided at the same time as the front end of the clip. Is pressed onto the outer surface of the shaft body.

(4) 上記(2)項または(4)項において、前記軸本体内に、芯挿入用開口を備える芯タンクを格納し、前記軸本体と芯タンクにおける芯挿入用開口の位置を整合させる。   (4) In the above item (2) or (4), a core tank having a core insertion opening is stored in the shaft main body, and the positions of the core insertion openings in the shaft main body and the core tank are aligned.

(5) 上記(1)項において、前記軸本体を、本体筒軸と、その後部筒軸に、本体筒軸に対して相対的に回動可能に外嵌させたキャップとより形成し、前記後部筒軸とキャップにそれぞれ芯挿入用開口を設け、前記キャップを回動させることによって、前記両芯挿入用開口が整合する位置と、整合しない位置の両者に切り換え得るようにする。   (5) In the above item (1), the shaft main body is formed by a main body cylinder shaft and a cap that is fitted on the rear cylinder axis so as to be rotatable relative to the main body cylinder axis, A core insertion opening is provided in each of the rear cylinder shaft and the cap, and by rotating the cap, the position can be switched between a position where the both core insertion openings are aligned and a position where they are not aligned.

(6) 上記(5)項において、前記キャップを、キャップと後部筒軸における両芯挿入用開口が整合しない位置に切り換えた場合に、後部筒軸に対するキャップの回動を規制する手段を設ける。   (6) In the above item (5), there is provided means for restricting the rotation of the cap with respect to the rear cylinder shaft when the cap is switched to a position where the cap and the double core insertion opening in the rear cylinder shaft are not aligned.

(7) 上記(5)項または(6)項において、前記軸本体における本体筒軸内に、芯挿入用開口を備える芯タンクを格納し、この芯タンクと、前記本体筒軸における後部筒軸における芯挿入用開口の位置を整合させる。   (7) In the above item (5) or (6), a core tank having a core insertion opening is stored in the main body cylinder shaft of the shaft main body, and the rear tank shaft in the core tank and the main body cylinder shaft is stored. The position of the opening for inserting the core in is aligned.

本発明によると、次のような効果が奏せられる。
a) 上記(1)項記載の発明によれば、芯挿入部が軸本体の外側面上に設けられているため、後端部の消しゴムキャップや消しゴムホルダーを取り外す必要がなく、芯を補充する際には、外側面上の芯挿入部を直接開けてワンタッチで行うことができる。
また、消しゴムキャップや消しゴムホルダーを取り外す必要がないため、これらを紛失する虞もない。
According to the present invention, the following effects can be obtained.
a) According to the invention described in the above item (1), since the core insertion portion is provided on the outer surface of the shaft body, it is not necessary to remove the eraser cap or the eraser holder at the rear end portion, and the core is replenished. In this case, the core insertion part on the outer surface can be directly opened and performed with one touch.
Further, since it is not necessary to remove the eraser cap and the eraser holder, there is no possibility of losing them.

b) 上記(2)項記載の発明によれば、蓋部が、軸本体の軸線と直交する軸回りに回動するため、芯挿入部を前記軸線方向に長く設けることができ、芯の補充作業が容易になるとともに、蓋部を閉じる向きにばねによって付勢してあるため、前記付勢力に抗した力で蓋部を開けて、芯を補充した後に、蓋部を保持している手を離すだけで蓋部が自動的に閉じられ、ワンタッチで芯の補充を行うことができる。   b) According to the invention described in the above item (2), since the lid portion rotates about an axis orthogonal to the axis of the shaft main body, the core insertion portion can be provided long in the axial direction, and the core is replenished. The work is facilitated and the spring is biased in the direction to close the lid, so the hand holding the lid after opening the lid with a force against the biasing force and refilling the core. The lid is automatically closed just by releasing and can be refilled with a single touch.

c) 上記(3)項記載の発明によれば、蓋部を閉じる方向の付勢力と、クリップの前端を軸本体の外側面上に押圧させる付勢力を、1つのばねをもって付与することができる。   c) According to the invention described in the above item (3), the biasing force in the direction of closing the lid portion and the biasing force for pressing the front end of the clip onto the outer surface of the shaft body can be applied with one spring. .

d) 上記(4)項記載の発明によれば、芯タンク内に効率よく芯を補充することができる。   d) According to the invention described in the above item (4), the lead can be efficiently replenished in the lead tank.

e) 上記(5)項記載の発明によれば、ばねを用いることなく、少ない部品をもってシャープペンシルを構成し得るとともに、キャップを回動して、後部筒軸とキャップの芯挿入用開口を整合させて、芯を補充した後に、キャップを回動させて非整合の位置にするという簡単な操作で効率よく芯の補充を行うことができる。
消しゴムホルダー等は、取り外す必要がないため、これらを紛失する虞もない。
e) According to the invention described in the above item (5), the mechanical pencil can be configured with a small number of parts without using a spring, and the cap is rotated to align the rear cylindrical shaft with the core insertion opening of the cap. Thus, after the lead is refilled, the lead can be efficiently refilled by a simple operation of rotating the cap to the non-aligned position.
Since it is not necessary to remove the eraser holder or the like, there is no risk of losing them.

f) 上記(6)項記載の発明によれば、キャップが回動して芯が外部に飛び出すことを効果的に防止することができる。   f) According to the invention described in the above item (6), it is possible to effectively prevent the cap from rotating and the core from popping out.

g) 上記(7)項記載の発明によれば、芯タンク内に効率よく芯を補充することができる。   g) According to the invention described in the above item (7), the lead can be efficiently replenished in the lead tank.

以下、本発明を添付図面に基づいて詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

図1は、本発明の第1実施形態のシャープペンシル(1)の斜視図、図2は、図1におけるシャープペンシル(2)の要部を拡大して示す分解斜視図、図3は、蓋部を開けて芯を補充する状態を示す要部拡大斜視図、図4は、図3に示すシャープペンシルの要部縦断面図、図5は、蓋部を閉じた状態を示す要部拡大斜視図である。   FIG. 1 is a perspective view of the mechanical pencil (1) according to the first embodiment of the present invention, FIG. 2 is an exploded perspective view showing an enlarged main part of the mechanical pencil (2) in FIG. 1, and FIG. 4 is an enlarged perspective view of an essential part showing a state in which the core is opened and the core is replenished, FIG. 4 is an essential part longitudinal sectional view of the mechanical pencil shown in FIG. 3, and FIG. 5 is an enlarged perspective view of an essential part showing a state where the lid is closed. FIG.

本発明のシャープペンシル(1)では、軸本体(2)の外側面(3)上に、開閉可能とした芯挿入部(4)が設けられている。   In the mechanical pencil (1) of the present invention, a core insertion portion (4) that can be opened and closed is provided on the outer surface (3) of the shaft body (2).

軸本体(2)内には、図2,図4に示すように、筒状の芯タンク(5)が格納されている。芯タンク(5)の後端(6)には、小径筒部(7)が連設されており、小径筒部(7)は、軸本体(2)の後端開口(8)から後方に突出している。   A cylindrical core tank (5) is stored in the shaft body (2) as shown in FIGS. A small-diameter cylindrical portion (7) is connected to the rear end (6) of the lead tank (5), and the small-diameter cylindrical portion (7) is rearward from the rear end opening (8) of the shaft body (2). It protrudes.

前記小径筒部(7)には、消しゴム(9)が取り付けられた消しゴムホルダー(10)が嵌入され、この消しゴムホルダー(10)を被覆するための消しゴムキャップ(11)が、前記小径筒部(7)に外嵌されている。   An eraser holder (10) to which an eraser (9) is attached is fitted into the small diameter cylindrical portion (7), and an eraser cap (11) for covering the eraser holder (10) is inserted into the small diameter cylindrical portion ( 7).

前記芯挿入部(4)は、軸本体(2)の外側面(3)上に設けられた芯挿入用開口(12)と、この芯挿入用開口(12)を開閉するための蓋部(13)とより構成されている。   The core insertion portion (4) includes a core insertion opening (12) provided on the outer surface (3) of the shaft body (2) and a lid portion for opening and closing the core insertion opening (12) ( It is composed of 13).

芯挿入用開口(12)は、軸本体(2)の後部近傍の外側面(3)上に、平面視において軸線方向に長い四辺形に形成され、芯(14)の補充作業が行い易いようになっている。   The core insertion opening (12) is formed on the outer surface (3) near the rear part of the shaft body (2) in a quadrilateral shape that is long in the axial direction in plan view so that the refilling operation of the core (14) can be performed easily. It has become.

図2に示すように、蓋部(13)は、前記芯挿入用開口(12)を覆うために充分な大きさを備える平面視ほぼ長方形状をなし、その後端の左右一方には、取手(13a)が設けられており、前端の左右両側には、通孔(13b)を有する1対の取付板(13c)(13c)が立設されている。   As shown in FIG. 2, the lid portion (13) has a substantially rectangular shape in plan view with a sufficient size to cover the core insertion opening (12), and a handle ( 13a) is provided, and a pair of mounting plates (13c) and (13c) having through holes (13b) are provided upright on both the left and right sides of the front end.

一方、軸本体(2)の芯挿入用開口(12)の後部における左右両側には、通孔(14a)を有する1対の支軸支持板(14)(14)が立設されている。   On the other hand, a pair of support shaft support plates (14) and (14) having through holes (14a) are erected on both the left and right sides of the rear portion of the core insertion opening (12) of the shaft body (2).

前記蓋部(13)は、前記1対の支持板(14)(14)間に配設され、支軸(15)を、軸本体(2)における支軸支持板(14)(14)の通孔(14a)(14a)、および蓋部(13)における取付板(13c)(13c)の通孔(13b)(13b)に挿通させることにより、軸本体(2)の軸線と直交する支軸(15)回りに回動して前記芯挿入用開口(12)を閉塞または開放し得るようになっている。   The lid (13) is disposed between the pair of support plates (14) and (14), and the support shaft (15) is connected to the support shaft support plates (14) and (14) of the shaft body (2). By inserting the through holes (14a) and (14a) and the through holes (13b) and (13b) of the mounting plates (13c) and (13c) in the lid portion (13), the shaft perpendicular to the axis of the shaft body (2) is supported. The core insertion opening (12) can be closed or opened by rotating around an axis (15).

また、クリップ(16)の後端下面(16a)の左右には、通孔(17a)を有する1対の取付板(17)(17)が下向きに垂設されており、前記通孔(17a)(17a)に前記支軸(15)を挿通させて、クリップ(16)が、前記蓋部(13)とともに軸本体(2)に取り付けられている。   In addition, a pair of mounting plates (17) and (17) having through holes (17a) are suspended downward on the left and right sides of the rear end lower surface (16a) of the clip (16), and the through holes (17a ) (17a) is inserted into the support shaft (15), and the clip (16) is attached to the shaft body (2) together with the lid portion (13).

前記支軸(15)の左右方向の中央には、ばね(18)が外嵌されており、このコイルばね(18)によって、前記蓋部(13)を、芯挿入用開口(12)が閉塞する向きに常時付勢しているとともに、前記クリップ(16)を、その前端下面(16b)が軸本体(2)の外側面(3)上に押圧される向きに常時付勢している。
なお、蓋部(13)、クリップ(16)、コイルばね(18)を取り付けた後に、支軸(15)の先端をかしめて抜けることがないようにしてある。
A spring (18) is externally fitted to the center of the support shaft (15) in the left-right direction, and the lid (13) and the core insertion opening (12) are closed by the coil spring (18). The clip (16) is always urged in such a direction that the lower surface (16b) of the front end is pressed onto the outer surface (3) of the shaft body (2).
In addition, after attaching the cover part (13), the clip (16), and the coil spring (18), the tip of the support shaft (15) is prevented from being pulled out.

また、芯タンク(5)の後部における、軸本体(2)の芯挿入用開口(12)に整合する位置には、同じく芯挿入用開口(5a)が設けられており、図3に示すように、取手(13a)を手で持って、コイルばね(18)の付勢力に抗して蓋部(13)を開けて補充した芯(19)が、円滑に芯タンク(5)内に格納されるようになっている。   Further, a core insertion opening (5a) is also provided at a position aligned with the core insertion opening (12) of the shaft body (2) in the rear part of the core tank (5), as shown in FIG. In addition, holding the handle (13a) by hand and opening the lid (13) against the biasing force of the coil spring (18), the refilled core (19) is smoothly stored in the core tank (5). It has come to be.

芯(19)の補充が完了次第、取手(13a)から手を離すことにより、コイルばね(18)の付勢力により、蓋部(13)は、図5に示すように自動的に閉じられる。
なお、小径筒部(7)の前端(図4において符号7aで示す)を、開口しておけば、芯タンク(5)内への芯(19)の補充および取り出しを芯挿入部(4)と併せて、必要に応じて、消しゴムキャップ(11)と消しゴムホルダー(10)を取り外して、芯タンク(5)の後端開口から行うこともできる。
As soon as the replenishment of the lead (19) is completed, the lid (13) is automatically closed as shown in FIG. 5 by releasing the handle (13a) and by the urging force of the coil spring (18).
If the front end (indicated by reference numeral 7a in FIG. 4) of the small-diameter cylindrical portion (7) is opened, the core insertion portion (4) can be used to replenish and remove the core (19) into the core tank (5). In addition, if necessary, the eraser cap (11) and the eraser holder (10) can be removed from the rear end opening of the lead tank (5).

図6は、本発明の第2実施形態のシャープペンシル(20)の要部分解斜視図、図7は、図6に示すシャープペンシル(20)を組立てた場合の要部拡大縦断面図、図8は、図7におけるVIII〜VIII線拡大断面図であり、芯挿入部を開口した状態を示す。図9は、芯挿入部を閉塞した状態を示す図8に相当する図である。   6 is an exploded perspective view of the main part of the mechanical pencil (20) according to the second embodiment of the present invention. FIG. 7 is an enlarged vertical sectional view of the main part when the mechanical pencil (20) shown in FIG. 6 is assembled. 8 is an enlarged sectional view taken along the line VIII-VIII in FIG. 7 and shows a state where the core insertion portion is opened. FIG. 9 is a view corresponding to FIG. 8 showing a state where the core insertion portion is closed.

シャープペンシル(20)における軸本体(21)が、本体筒軸(22)と、その後部に外嵌されるキャップ(23)とより形成されている。   A shaft main body (21) of the mechanical pencil (20) is formed by a main body cylinder shaft (22) and a cap (23) fitted on the rear portion thereof.

本体筒軸(22)内には、芯タンク(24)が格納され、その後端(25)は、本体筒軸(22)の後端開口(27)及びキャップ(23)の後端開口(26)から突出し、前記後端(25)の小径筒部(28)には、第1実施形態の場合と同様に、消しゴム(29)を保持した消しゴムホルダー(30)が嵌入されるとともに、消しゴムキャップ(31)が外嵌されている。   A core tank (24) is housed in the main body cylinder shaft (22), and its rear end (25) has a rear end opening (27) of the main body cylinder shaft (22) and a rear end opening (26 of the cap (23). ) And an eraser holder (30) holding an eraser (29) is fitted into the small-diameter cylindrical portion (28) of the rear end (25), as in the first embodiment, and an eraser cap (31) is externally fitted.

本体筒軸(22)の後部は、2つの段部(32)(33)をもって、縮径され、後部筒軸(34)には、軸線方向に長い芯挿入用開口(35)が設けられている。前記2つの段部(32)(33)間は、キャップ(23)を後部筒軸(34)に外嵌させるための嵌合部(36)となっている。   The rear portion of the main body cylindrical shaft (22) is reduced in diameter by two step portions (32) and (33), and the rear cylindrical shaft (34) is provided with a long core insertion opening (35) in the axial direction. Yes. Between the two step portions (32) and (33), there is a fitting portion (36) for fitting the cap (23) to the rear cylinder shaft (34).

前記嵌合部(36)は、図6,図8に示すように、周方向に設けられた段部(37)(37)をもって、一部縮径された縮径部(36a)が形成されている。   As shown in FIGS. 6 and 8, the fitting portion (36) has a stepped portion (37) (37) provided in the circumferential direction, and a reduced diameter portion (36a) partially reduced in diameter is formed. ing.

一方、キャップ(23)には、クリップ(38)が取り付けられているとともに、本体筒軸(22)における芯挿入用開口(35)とほぼ同じ大きさの芯挿入用開口(39)が設けられている。本実施形態における芯挿入部は、前記両芯挿入用開口(35)(39)からなる。   On the other hand, the clip (38) is attached to the cap (23), and a core insertion opening (39) having substantially the same size as the core insertion opening (35) in the main body cylindrical shaft (22) is provided. ing. The core insertion portion in the present embodiment includes the double core insertion openings (35) and (39).

キャップ(23)の前端開口(40)の内周面には、本体筒軸(22)における嵌合部(36)と嵌合する嵌合部(41)が設けられている。   On the inner peripheral surface of the front end opening (40) of the cap (23), a fitting portion (41) that fits with the fitting portion (36) of the main body cylindrical shaft (22) is provided.

キャップ(23)における嵌合部(41)には、本体筒軸(22)における嵌合部(36)の縮径部(36a)に対応して、段部(42)(42)をもって内方に突出する突出部(41a)が設けられており、この突出部(41a)は、前記縮径部(36a)に嵌合している。   The fitting part (41) in the cap (23) has a step part (42) (42) inward corresponding to the reduced diameter part (36a) of the fitting part (36) in the main body cylindrical shaft (22). A projecting portion (41a) projecting from the inner surface is provided, and the projecting portion (41a) is fitted to the reduced diameter portion (36a).

この突出部(41a)の周方向の長さ(2つの段部(42)(42)間の周方向の長さ)L1は、本体筒軸(22)における縮径部(36a)の周方向の長さ(2つの段部(37)(37)間の周方向の長さ)L2よりも短く形成されている。このためキャップ(23)を、本体筒軸(22)における後部筒軸(34)に外嵌させて、本体筒軸(22)に対して相対的に回動させた場合、(L2−L1)の長さだけ回動し得るようになっている。   The circumferential length of the projecting portion (41a) (the circumferential length between the two step portions (42) and (42)) L1 is the circumferential direction of the reduced diameter portion (36a) of the main body cylindrical shaft (22). (Length in the circumferential direction between the two step portions (37) and (37)) L2. Therefore, when the cap (23) is externally fitted to the rear cylinder shaft (34) of the main body cylinder shaft (22) and rotated relative to the main body cylinder shaft (22), (L2-L1) It can be turned by the length of.

図8は、キャップ(23)と後部筒軸(34)の両者における芯挿入用開口(39)(35)を整合させた場合を示す。   FIG. 8 shows a case where the core insertion openings (39) and (35) in both the cap (23) and the rear cylinder shaft (34) are aligned.

芯タンク(5)における芯挿入用開口(43)は、後部筒軸(34)における芯挿入用開口(35)と整合するように設けられている。したがって、図8に示す状態においては、キャップ(23)、本体筒軸(22)における後部筒軸(34)および芯タンク(24)の3者における芯挿入用開口(39)(35)(43)が整合し、外方から容易に芯を補充して芯タンク(24)内に格納することができるようになっている。   The lead insertion opening (43) in the lead tank (5) is provided so as to be aligned with the lead insertion opening (35) in the rear cylinder shaft (34). Therefore, in the state shown in FIG. 8, the core insertion openings (39) (35) (43) of the cap (23), the rear cylinder shaft (34) of the main body cylinder shaft (22), and the core tank (24). ) Are aligned and can be easily refilled from the outside and stored in the lead tank (24).

芯を補充した後は、キャップ(23)を、本体筒軸(22)における後部筒軸(34)に対して相対的に回動させて、図9に示す状態とすることにより、キャップ(23)と後部筒軸(34)における芯挿入用開口(39)(35)が整合しない状態となり、芯タンク(24)内に格納した芯が外部に飛び出すことが防止される。   After replenishing the lead, the cap (23) is rotated relative to the rear cylinder shaft (34) of the main body cylinder shaft (22) to obtain the state shown in FIG. ) And the core insertion openings (39) and (35) in the rear cylinder shaft (34) are not aligned, and the core stored in the core tank (24) is prevented from jumping out.

図10,図11は、それぞれ図8,図9における破線円A,B内の部分拡大図である。   10 and 11 are partially enlarged views in broken circles A and B in FIGS. 8 and 9, respectively.

キャップ(23)を回動させて、キャップ(23)と後部筒軸(34)における両者の芯挿入用開口(39)(35)が整合しない、図9に示すような位置に切り換えた場合には、図11に示すように、キャップ(23)の嵌合部(41)における突出部(41a)の端部に内方向きに突出して設けられた係止突起(44)が、後部筒軸(34)の嵌合部(36)における縮径部(36a)の端部に設けられた凹部(45)に係止して、後部筒軸(34)に対するキャップ(23)の回動が規制される。
そのため、キャップ(23)が回動して、キャップ(23)と後部筒軸(34)の両者の芯挿入用開口(39)(35)が整合して芯が外部に飛び出すことを防止することができる。
When the cap (23) is rotated so that the core insertion openings (39) and (35) of the cap (23) and the rear cylinder shaft (34) are not aligned with each other and switched to the position shown in FIG. As shown in FIG. 11, the locking projection (44) provided to project inwardly at the end of the projecting portion (41a) in the fitting portion (41) of the cap (23) has a rear cylinder shaft. The fitting (36) of (34) is locked to the recess (45) provided at the end of the reduced diameter portion (36a), and the rotation of the cap (23) with respect to the rear cylinder shaft (34) is restricted. Is done.
Therefore, the cap (23) rotates and the core insertion openings (39) and (35) of both the cap (23) and the rear cylinder shaft (34) are aligned to prevent the core from jumping out. Can do.

キャップ(23)を回動させて、キャップ(23)と後部筒軸(34)における両者の芯挿入用開口(39)(35)が整合しない、図8に示すような位置に切り換えた場合には、前記係止突起(44)は、図10に示すように、後部筒軸(34)の嵌合部(36)における縮径部(36a)の外側面に押圧されて外方に向けて弾性変形した状態にある。   When the cap (23) is rotated so that the core insertion openings (39) and (35) of the cap (23) and the rear cylinder shaft (34) are not aligned with each other and switched to the position shown in FIG. As shown in FIG. 10, the locking projection (44) is pressed outward by the outer surface of the reduced diameter portion (36a) in the fitting portion (36) of the rear cylinder shaft (34). It is in an elastically deformed state.

そのためキャップ(23)を回動させて、係止突起(44)の位置を、後部筒軸(34)の嵌合部(36)における縮径部(36a)の凹部(45)に整合させると、前記係止突起(44)の遊端は、内方に付勢された状態にあるため、瞬時に前記凹部(45)に係合して、キャップ(23)の回動が規制される。   Therefore, by rotating the cap (23), the position of the locking projection (44) is aligned with the recess (45) of the reduced diameter portion (36a) in the fitting portion (36) of the rear cylinder shaft (34). Since the free end of the locking projection (44) is biased inwardly, it engages with the recess (45) instantaneously, and the rotation of the cap (23) is restricted.

なお、第2実施形態においては、本体筒軸(22)における後部筒軸(34)にキャップ(23)を外嵌させ、キャップ(23)と後部筒軸(34)の両者にそれぞれ設けた芯挿入用開口(39)(35)の位置を整合あるいは非整合とするようにしたが、その他の実施形態として、キャップ(23)に芯挿入用開口(39)を設けることなく、芯を補充する際には、キャップ(23)を取り外すようにしてもよい。また、キャップ(23)を用いず、本体筒軸(22)における芯挿入用開口(35)に、開閉可能な蓋部、たとえば前後方向にスライドする蓋部を設けて、この蓋部をスライドさせて、芯を補充するようにしてもよい。   In the second embodiment, the cap (23) is fitted on the rear cylinder shaft (34) of the main body cylinder shaft (22), and the cores provided on both the cap (23) and the rear cylinder shaft (34), respectively. Although the positions of the insertion openings (39) and (35) are aligned or not aligned, as another embodiment, the core is replenished without providing the core insertion opening (39) in the cap (23). At this time, the cap (23) may be removed. In addition, a cap that can be opened and closed, for example, a lid that slides in the front-rear direction, is provided in the core insertion opening (35) of the main body cylinder shaft (22) without using the cap (23), and the lid is slid. The lead may be replenished.

本発明の第1実施形態のシャープペンシルの斜視図である。1 is a perspective view of a mechanical pencil according to a first embodiment of the present invention. 図1に示すシャープペンシルの要部を拡大して示す分解斜視図である。It is a disassembled perspective view which expands and shows the principal part of the mechanical pencil shown in FIG. 蓋部を開けて芯を補充する状態を示す要部拡大斜視図である。It is a principal part expansion perspective view which shows the state which opens a cover part and replenishes a core. 図3に示すシャープペンシルの要部縦断面図である。It is a principal part longitudinal cross-sectional view of the mechanical pencil shown in FIG. 蓋部を閉じた状態を示す要部拡大斜視図である。It is a principal part expansion perspective view which shows the state which closed the cover part. 本発明の第2実施形態のシャープペンシルの要部分解斜視図である。It is a principal part disassembled perspective view of the mechanical pencil of 2nd Embodiment of this invention. 図6に示すシャープペンシルを組立てた場合の要部拡大縦断面図である。FIG. 7 is an enlarged vertical sectional view of a main part when the mechanical pencil shown in FIG. 6 is assembled. 図7におけるVIII〜VIII線拡大断面図であり、芯挿入部を開口した状態を示す。It is the VIII-VIII line expanded sectional view in FIG. 7, and shows the state which opened the core insertion part. 芯挿入部を閉塞した状態を示す図8に相当する図である。It is a figure equivalent to Drawing 8 showing the state where the core insertion part was obstructed. 図8における一点鎖線円A内の部分拡大図である。It is the elements on larger scale in the dashed-dotted line circle A in FIG. 図9における一点鎖線円B内の部分拡大図である。It is the elements on larger scale in the dashed-dotted line circle B in FIG.

符号の説明Explanation of symbols

(1)シャープペンシル
(2)軸本体
(3)外側面
(4)芯挿入部
(5)芯タンク
(5a)芯挿入用開口
(6)後端
(7)小径筒部
(7a)前端
(8)後端開口
(9)消しゴム
(10)消しゴムホルダー
(11)消しゴムキャップ
(12)芯挿入用開口
(13)蓋部
(13a)取手
(13b)通孔
(13c)取付板
(14)支軸支持板
(14a)通孔
(15)支軸
(16)クリップ
(16a)後端下面
(16b)前端下面
(17)取付板
(17a)通孔
(18)コイルばね
(19)芯
(20)シャープペンシル
(21)軸本体
(22)本体筒軸
(23)キャップ
(24)芯タンク
(25)後端
(26)(27)後端開口
(28)小径筒部
(29)消しゴム
(30)消しゴムホルダー
(31)消しゴムキャップ
(32)(33)段部
(34)後部筒軸
(35)芯挿入用開口
(36)嵌合部
(36a)縮径部
(37)段部
(38)クリップ
(39)芯挿入用開口
(40)前端開口
(41)嵌合部
(41a)突出部
(42)段部
(43)芯挿入用開口
(44)係止突起
(45)凹部
(1) Mechanical pencil
(2) Shaft body
(3) Outer surface
(4) Core insertion part
(5) Core tank
(5a) Core insertion opening
(6) Rear end
(7) Small diameter cylinder
(7a) Front end
(8) Rear end opening
(9) Eraser
(10) Eraser holder
(11) Eraser cap
(12) Core insertion opening
(13) Lid
(13a) Handle
(13b) Through hole
(13c) Mounting plate
(14) Support shaft support plate
(14a) Through hole
(15) Spindle
(16) Clip
(16a) Rear bottom surface
(16b) Front end bottom surface
(17) Mounting plate
(17a) Through hole
(18) Coil spring
(19) Core
(20) Mechanical pencil
(21) Shaft body
(22) Body cylinder shaft
(23) Cap
(24) Core tank
(25) Rear end
(26) (27) Rear end opening
(28) Small diameter cylinder
(29) Eraser
(30) Eraser holder
(31) Eraser cap
(32) (33) Step
(34) Rear cylinder shaft
(35) Core insertion opening
(36) Fitting part
(36a) Reduced diameter part
(37) Step
(38) Clip
(39) Core insertion opening
(40) Front end opening
(41) Fitting part
(41a) Projection
(42) Step
(43) Core insertion opening
(44) Locking projection
(45) Recess

Claims (7)

軸本体の外側面上に、開閉可能とした芯挿入部を設けたことを特徴とするシャープペンシル。   A mechanical pencil characterized in that a core insertion portion that can be opened and closed is provided on the outer surface of the shaft body. 前記芯挿入部を、軸本体の外側面上に設けた芯挿入用開口と、軸本体の軸線と直交する軸回りに回動して前記芯挿入用開口を開閉する蓋部とより形成し、かつ前記蓋部を、前記芯挿入用開口を閉じる向きにばねによって付勢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。   The core insertion portion is formed of a core insertion opening provided on the outer surface of the shaft body, and a lid portion that rotates around an axis orthogonal to the axis of the shaft body to open and close the core insertion opening. 2. The mechanical pencil according to claim 1, wherein the lid is biased by a spring in a direction to close the opening for inserting the core. クリップを、前記蓋部の回動軸と同じ軸回りに回動し得るように軸本体に取り付けるとともに、蓋部を付勢するばねをもって、同時にクリップの前端を、軸本体の外側面上に押圧させるようにしたことを特徴とする請求項2記載のシャープペンシル。   The clip is attached to the shaft main body so that it can be rotated about the same axis as the rotation axis of the lid portion, and the front end of the clip is simultaneously pressed onto the outer surface of the shaft main body with a spring for biasing the lid portion. The mechanical pencil according to claim 2, wherein the mechanical pencil is used. 前記軸本体内に、芯挿入用開口を備える芯タンクを格納し、前記軸本体と芯タンクにおける芯挿入用開口の位置を整合させたことを特徴とする請求項2または4記載のシャープペンシル。   5. The mechanical pencil according to claim 2, wherein a lead tank having a lead insertion opening is stored in the shaft main body, and the positions of the lead insertion openings in the shaft main body and the lead tank are aligned. 前記軸本体を、本体筒軸と、その後部筒軸に、本体筒軸に対して相対的に回動可能に外嵌させたキャップとより形成し、前記後部筒軸とキャップにそれぞれ芯挿入用開口を設け、前記キャップを回動させることによって、前記両芯挿入用開口が整合する位置と、整合しない位置の両者に切り換え得るように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。   The shaft body is formed by a main body cylinder shaft and a cap that is externally fitted to the rear cylinder axis so as to be rotatable relative to the main body cylinder axis, and cores are inserted into the rear cylinder axis and the cap, respectively. 2. The mechanical pencil according to claim 1, wherein an opening is provided and the cap is rotated so that the position can be switched between a position where the opening for both-core insertion is aligned and a position where the opening is not aligned. 前記キャップを、キャップと後部筒軸における両芯挿入用開口が整合しない位置に切り換えた場合に、後部筒軸に対するキャップの回動を規制する手段を設けたことを特徴とする請求項5記載のシャープペンシル。   6. The device according to claim 5, further comprising means for restricting the rotation of the cap relative to the rear cylinder shaft when the cap is switched to a position where the openings for inserting the cores in the cap and the rear cylinder shaft are not aligned. mechanical pencil. 前記軸本体における本体筒軸内に、芯挿入用開口を備える芯タンクを格納し、この芯タンクと、前記本体筒軸における後部筒軸における芯挿入用開口の位置を整合させたことを特徴とする請求項5または6記載のシャープペンシル。   A core tank having a core insertion opening is stored in the main body cylinder shaft of the shaft main body, and the position of the core insertion opening in the rear cylinder shaft of the main body cylinder shaft is aligned with the core tank. The mechanical pencil according to claim 5 or 6.
JP2004042012A 2004-02-18 2004-02-18 Mechanical pencil Pending JP2005231148A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Country Link
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100785310B1 (en) 2007-03-21 2007-12-14 류형욱 Mechanical pencil with partitioned leads room
JP2008030410A (en) * 2006-07-31 2008-02-14 Pentel Corp Mounting structure of clip on shaft cylinder
JP2008246996A (en) * 2007-03-30 2008-10-16 Pentel Corp Clip connection structure
WO2014017258A1 (en) * 2012-07-27 2014-01-30 三菱鉛筆株式会社 Mechanical pencil

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008030410A (en) * 2006-07-31 2008-02-14 Pentel Corp Mounting structure of clip on shaft cylinder
KR100785310B1 (en) 2007-03-21 2007-12-14 류형욱 Mechanical pencil with partitioned leads room
JP2008246996A (en) * 2007-03-30 2008-10-16 Pentel Corp Clip connection structure
WO2014017258A1 (en) * 2012-07-27 2014-01-30 三菱鉛筆株式会社 Mechanical pencil
JP2014024272A (en) * 2012-07-27 2014-02-06 Mitsubishi Pencil Co Ltd Mechanical pencil

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