JP5339619B2 - Swing-out mechanical pencil - Google Patents

Swing-out mechanical pencil Download PDF

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JP5339619B2
JP5339619B2 JP2009241394A JP2009241394A JP5339619B2 JP 5339619 B2 JP5339619 B2 JP 5339619B2 JP 2009241394 A JP2009241394 A JP 2009241394A JP 2009241394 A JP2009241394 A JP 2009241394A JP 5339619 B2 JP5339619 B2 JP 5339619B2
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pressing member
shaft cylinder
notch
locking projection
shaft
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JP2011088289A (en
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寛 加藤
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Pilot Corp KK
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Pilot Corp KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive shaking-out type mechanical pencil which easily mounts a pressing member 14 energized rearwardly in the longitudinal direction with a return spring 15 by inserting the pressing member 14 from the rear side of a shaft cylinder 8, reduces the number of components and simplifies assembly manhours. <P>SOLUTION: An inner flange 8C is formed in the shaft cylinder 8, and a notch 8D is formed in the inner flange 8C. A key groove 8E extended in the longitudinal direction is constituted on the rear side of the inner flange 8C of the shaft cylinder 8. A lock projection 14B which can be inserted to the notch 8D and a bendable projection 14C are constituted in the pressing member 14. After the lock projection 14B is inserted to the notch 8D of the shaft cylinder 8 by inserting the pressing member 14 from the rear side of the shaft cylinder 8, the pressing member 14 is rotated appropriately to engage the projection 14C with the key groove 8E of the shaft cylinder 8 so as to slide in the longitudinal direction and without rotation. Thus, when the pressing member 14 is energized rearwardly with the return spring 15, the lock projection 14B is made to abut on the inner flange 8C of the shaft cylinder 8. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

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とともに、リターンスプリングにより押圧部材を長手方向後方に付勢する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 type mechanical pencil that advances a chuck by an inertial force of a weight body and feeds a lead, and urges a pressing member backward in a longitudinal direction by a return spring.

従来、鞘の後方から挿入された押部材と鞘の内鍔の間にリターンスプリングを張架するとともに中子を前方から挿入し、押部材の係止突起を中子の係止段に係合することにより中子と押部材を連結し、リターンスプリングにより長手方向後方に付勢された押部材を中子により受け止めるとともに、重量体と中子を当接可能に構成した振出式シャープペンシルが知られている。（特許文献１参照）   Conventionally, a return spring is stretched between the pressing member inserted from the rear of the sheath and the inner collar of the sheath, and the core is inserted from the front, and the locking protrusion of the pressing member is engaged with the locking step of the core As a result, there is known a swing-out mechanical pencil that connects the core and the pressing member, receives the pressing member urged rearward in the longitudinal direction by the return spring, and allows the weight and the core to contact each other. It has been. (See Patent Document 1)

しかしながら、上記振出式シャープペンシルは、部品点数が多く構造も複雑なため低価格の振出式シャープペンシルには用いることができないという問題があった。   However, the above-mentioned swing-out mechanical pencil has a problem in that it cannot be used for a low-cost swing-out mechanical pencil because the number of parts is large and the structure is complicated.

特許第４３２３９２０号公報Japanese Patent No. 4323920

解決しようとする問題点は、中子を鞘の前方から挿入しなければならず、胴と鞘を別部品で構成しなければならない点である。   The problem to be solved is that the core must be inserted from the front of the sheath, and the trunk and the sheath must be formed of separate parts.

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おいて、軸筒に内鍔を形成するとともにその内鍔に切欠部を形成し、前記軸筒の内鍔後方に長手方向に伸びたキー溝を構成し、更に、押圧部材に前記切欠部を挿通可能な係止突起を構成するとともに押圧部材に撓み可能な突部を構成し、押圧部材を軸筒の後方から挿入して突部が軸筒の切欠部を挿通した後、押圧部材を適宜回動させて前記突部を軸筒のキー溝に長手方向には摺動可能でかつ回動不能に係合させることにより、リターンスプリングによって押圧部材が後方に付勢された時、係止突起が軸筒の内鍔に当接されることを第１の特徴とする。   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, and an inner flange is formed in the shaft cylinder and a notch is formed in the inner cylinder. A key groove extending in the longitudinal direction is formed on the pressing member, a locking protrusion is formed on the pressing member through which the notch can be inserted, and a protruding part is formed on the pressing member. After the protrusion has been inserted through the notch of the shaft tube, the pressing member is appropriately rotated to engage the protrusion with the key groove of the shaft tube in the longitudinal direction and non-rotatably. Thus, when the pressing member is urged rearward by the return spring, the first feature is that the locking projection comes into contact with the inner collar of the shaft tube.

また、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、軸筒に内段を形成するとともにその内段から前方に伸びた切欠部を形成し、前記切欠部と連通してカム窓を構成し、このカム窓の前縁を傾斜させて構成し、前記軸筒の内段後方に長手方向に伸びたキー溝を構成し、更に、押圧部材に前記切欠部を挿通可能な係止突起を構成するとともに押圧部材に撓み可能な突部を構成し、押圧部材を軸筒の後方から挿入して係止突起を軸筒のカム窓に挿入し、係止突起をカム窓の傾斜した前縁に当接させて押圧部材を適宜回転させ、前記突部を軸筒のキー溝に長手方向には摺動可能でかつ回動不能に係合させることにより、リターンスプリングによって押圧部材が後方に付勢された時、係止突起が軸筒のカム窓後縁に当接させることを第２の特徴とする。   Further, in the swing-out type mechanical pencil that advances the chuck by the inertial force of the weight body and feeds the lead, an inner stage is formed in the shaft cylinder and a notch part extending forward from the inner stage is formed, and communicated with the notch part. A cam window is formed, the front edge of the cam window is inclined, a key groove extending in the longitudinal direction is formed behind the inner stage of the shaft tube, and the notch is inserted into the pressing member. The engaging projection is configured and a protruding portion that can be bent is formed on the pressing member. The pressing member is inserted from the rear side of the shaft tube, the locking projection is inserted into the cam window of the shaft tube, and the locking projection is cammed. By rotating the pressing member appropriately while abutting against the inclined front edge of the window and engaging the protrusion with the key groove of the shaft cylinder in the longitudinal direction and non-rotatably, the return spring When the pressing member is urged rearward, the locking projection is That is brought into contact with the window trailing edge and the second feature.

本発明の振出式シャープペンシルは、軸筒の後方から挿入した押圧部材の係止突起を軸筒の内鍔に形成した切欠部を挿通させた後、押圧部材を適宜回転するのみで押圧部材が軸筒に取り付けられ、部品点数が少なくかつ取り付けが簡単となって低価格の振出式シャープペンシルが提供できる利点が得られるものである。   The swing-out mechanical pencil of the present invention allows the pressing member to be rotated by appropriately rotating the pressing member after inserting the notch portion formed in the inner collar of the axial tube with the locking projection of the pressing member inserted from the rear of the axial tube. It is attached to the shaft cylinder, and the number of parts is small, and the attachment is easy, and the advantage that a low-price swing-out mechanical pencil can be provided is obtained.

図１は本発明の実施例１の振出式シャープペンシルを示す断面図である。（実施例１）FIG. 1 is a cross-sectional view showing a swing-out mechanical pencil according to a first embodiment of the present invention. Example 1 図２は図１のＡ−Ａ線を示す拡大断面図である。（実施例１）FIG. 2 is an enlarged sectional view taken along line AA of FIG. Example 1 図３は図１のＢ−Ｂ線を示す拡大断面図である。（実施例１）FIG. 3 is an enlarged sectional view taken along line BB in FIG. Example 1 図４は本発明の実施例１における軸筒の切欠部及びキー溝と押圧部材の係止突起及び突部の関係を示す拡大展開図である。（実施例１）FIG. 4 is an enlarged development view showing the relationship between the notch and key groove of the shaft cylinder and the locking protrusion and protrusion of the pressing member in Embodiment 1 of the present invention. Example 1 図５は本発明の実施例１の振出式シャープペンシルにおける重量体を示す拡大断面図である。（実施例１）FIG. 5 is an enlarged cross-sectional view showing a weight body in the swing-out mechanical pencil of Example 1 of the present invention. Example 1 図６は本発明の実施例２における軸筒の切欠部、土手部及びキー溝と押圧部材の係止突起及び突部の関係を示す拡大展開図である。（実施例２）FIG. 6 is an enlarged development view showing the relationship between the cutout portion, bank portion, and key groove of the shaft tube and the locking projection and protrusion of the pressing member in Embodiment 2 of the present invention. (Example 2) 図７は本発明の実施例３の振出式シャープペンシルを示す断面図である。（実施例３）FIG. 7 is a cross-sectional view showing a swing-out mechanical pencil according to a third embodiment of the present invention. (Example 3) 図８は本発明の実施例３における軸筒のカム窓及び切欠部と押圧部材の係止突起及び突部の関係を示す拡大展開図である。（実施例３）FIG. 8 is an enlarged development view showing the relationship between the cam window and the cutout portion of the shaft cylinder and the locking projection and the protrusion of the pressing member in Embodiment 3 of the present invention. (Example 3)

部品点数が少なくかつ簡単に押圧部材が取り付けられる振出式シャープペンシルを実現した。   A swing-out mechanical pencil that has a small number of parts and can be easily attached to a pressing member has been realized.

以下、図１、図２、図３及び図４に基づいて本発明における実施例１の振出式シャープペンシルを説明する。また、図１の左側を前方とし右側を後方とする。先ず、チャック１と、コネクター２を介してチャック１に連結されかつ予備の芯３を収納した芯タンク４と、チャック１の頭部１Ａに外嵌された締具５と、締具５を受け止める連結具６と、連結具６とコネクター２の間に２００ｇ以下の取付時荷重で設けられるスプリング７とにより振出式シャープペンシルの機構部を構成する。   Hereinafter, based on FIG.1, FIG.2, FIG.3 and FIG. 4, the swing-out type mechanical pencil of Example 1 in this invention is demonstrated. Moreover, let the left side of FIG. 1 be the front, and let the right side be back. First, a chuck 1, a core tank 4 connected to the chuck 1 via a connector 2 and storing a spare core 3, a fastener 5 fitted on the head 1 </ b> A of the chuck 1, and the fastener 5 are received. The mechanical part of the swing-out mechanical pencil is constituted by the coupling tool 6 and the spring 7 provided with a load of 200 g or less between the coupling tool 6 and the connector 2.

前記機構部を軸筒８の前方より挿入し、軸筒８の前端と軸筒８に螺合された先部材９の内段９Ａにより連結具６を挾持する。前記先部材９には芯３を適宜の力で保持するゴム等の弾性体で構成された芯ホルダー１０が内蔵されている。また、軸筒８の前部細径部８Ａにはゴム製の軟質材で構成されたグリップ１１が取り付けられる。   The mechanism portion is inserted from the front of the shaft tube 8, and the connecting tool 6 is held by the front end of the shaft tube 8 and the inner stage 9 </ b> A of the tip member 9 screwed into the shaft tube 8. The tip member 9 contains a lead holder 10 made of an elastic body such as rubber that holds the lead 3 with an appropriate force. A grip 11 made of a soft rubber material is attached to the front narrow diameter portion 8 </ b> A of the shaft tube 8.

更に、図５に示したように、断面四角形の金属線を密着したコイル状に巻回して円筒状の重量体１２を構成する。この重量体１２を軸筒８の内孔８Ｂと芯タンク４の間に摺動可能に配置する。   Furthermore, as shown in FIG. 5, a cylindrical weight body 12 is configured by winding a metal wire having a square cross section into a close coil shape. The weight body 12 is slidably disposed between the inner hole 8 </ b> B of the shaft cylinder 8 and the core tank 4.

更にまた、軸筒８の後部表面にクリップ１３を一体に形成するとともに、軸筒８の後部内面に内鍔８Ｃを形成する。また、前記内鍔８Ｃに切欠部８Ｄを形成するとともに、軸筒８の内鍔８Ｃ後方に後端より長手方向前方に伸びたキー溝８Ｅを構成する。   Further, the clip 13 is integrally formed on the rear surface of the shaft cylinder 8, and the inner collar 8 </ b> C is formed on the rear inner surface of the shaft cylinder 8. A notch 8D is formed in the inner flange 8C, and a key groove 8E extending from the rear end in the longitudinal direction is formed behind the inner flange 8C of the shaft tube 8.

更にまた、押圧部材１４の筒部１４Ａに前記内鍔８Ｃの切欠部８Ｄを挿通可能な係止突起１４Ｂを構成する。また、前記係止突起１４Ｂより後方位置に突部１４Ｃを構成し、この突部１４Ｃの両側に長手方向に伸びた切溝１４Ｄを形成して突部１４Ｃを撓み可能に構成する。更に、押圧部材１４の内面には芯挿通口を有する内鍔１４Ｅが形成され、この内鍔１４Ｅの前面が芯タンク４の後端を押圧する押圧面となっている。   Furthermore, a locking projection 14B that can be inserted into the cylindrical portion 14A of the pressing member 14 through the cutout portion 8D of the inner flange 8C is configured. Further, a protrusion 14C is formed at a position rearward of the locking protrusion 14B, and cut grooves 14D extending in the longitudinal direction are formed on both sides of the protrusion 14C so that the protrusion 14C can be bent. Further, an inner collar 14E having a core insertion opening is formed on the inner surface of the pressing member 14, and the front surface of the inner casing 14E serves as a pressing surface that presses the rear end of the core tank 4.

この押圧部材１４の筒部１４Ａにリターンスプリング１５を外嵌した後、軸筒８の後方より押圧部材１４を挿入し、押圧部材１４の係止突起１４Ｂが軸筒８の内鍔８Ｃに形成した切欠部８Ｄを挿通した後、押圧部材１４を適宜回転させて突部１４Ｃを軸筒８のキー溝８Ｅに係合させ、軸筒８に対して押圧部材１４を長手方向には摺動可能でかつ回動不能に取り付ける。   After the return spring 15 is fitted over the cylindrical portion 14A of the pressing member 14, the pressing member 14 is inserted from the rear of the shaft cylinder 8, and the locking projection 14B of the pressing member 14 is formed on the inner flange 8C of the shaft cylinder 8. After inserting the notch 8D, the pressing member 14 is appropriately rotated so that the protrusion 14C is engaged with the key groove 8E of the shaft tube 8, and the pressing member 14 can slide in the longitudinal direction with respect to the shaft tube 8. And attach it so that it cannot rotate.

また、リターンスプリング１５が軸筒８の内鍔８Ｃと押圧部材１４の外段１４Ｆとの間に３５０ｇ程度の取付時荷重で取り付けられることにより、通常押圧部材１４は長手方向後方に付勢され、押圧部材１４の係止突起１４Ｂが軸筒８の内鍔８Ｃに当接される。この時、押圧部材１４は突部１４Ｃが軸筒８のキー溝８Ｅに係合されて回動不能となっているので、係止突起１４Ｂは内鍔８Ｃの切欠部８Ｄから外れてしまう恐れはない。また、係止突起１４Ｂは撓まないので、内鍔８Ｃとの係止が外れてしまう恐れもない。   In addition, the return spring 15 is attached between the inner flange 8C of the shaft cylinder 8 and the outer stage 14F of the pressing member 14 with an attachment load of about 350 g, so that the normal pressing member 14 is normally urged rearward in the longitudinal direction, The locking protrusion 14B of the pressing member 14 is brought into contact with the inner collar 8C of the shaft tube 8. At this time, since the protrusion 14C is engaged with the key groove 8E of the shaft tube 8 and cannot be rotated, the locking member 14B may be detached from the notch 8D of the inner collar 8C. Absent. Further, since the locking projection 14B does not bend, there is no possibility that the locking with the inner collar 8C is released.

更に、前記押圧部材１４の前部内孔１４Ｇには芯タンク４の後部が挿入され、この芯タンク４の後端と押圧部材１４の押圧面は適宜離間して構成されている。押圧部材１４の後部内孔１４Ｈには消しゴム１６が嵌合されて取り付けられ、かつ、消しゴム１６を覆うノブ１７が押圧部材１４の後部外面１４Ｉに嵌合される。また、前記重量体１２はコネクター２の外鍔２Ａと押圧部材１４の前端により長手方向の摺動が規制される。   Further, the rear portion of the core tank 4 is inserted into the front inner hole 14G of the pressing member 14, and the rear end of the core tank 4 and the pressing surface of the pressing member 14 are appropriately separated. An eraser 16 is fitted and attached to the rear inner hole 14H of the pressing member 14, and a knob 17 covering the eraser 16 is fitted to the rear outer surface 14I of the pressing member 14. The weight body 12 is restricted from sliding in the longitudinal direction by the outer casing 2A of the connector 2 and the front end of the pressing member 14.

以上説明した振出式シャープペンシルは、軸筒８を振ることにより生じる重量体１２の慣性力によりスプリング７を圧縮してチャック１を前進させ芯３を繰り出す。また、芯タンク４内の予備の芯３を追従させるには、ノブ１７を押圧することにより押圧部材１４の押圧面が芯タンク４の後端を押圧し、芯タンク４及びチャック１が前進することにより、先部材９内の短くなった残芯３を排出するとともに次の芯３を先部材９の先端より突出させる。   The swing-out mechanical pencil described above compresses the spring 7 by the inertia force of the weight body 12 generated by swinging the shaft tube 8 to advance the chuck 1 and feed the core 3. Further, in order to follow the spare core 3 in the core tank 4, by pressing the knob 17, the pressing surface of the pressing member 14 presses the rear end of the core tank 4, and the core tank 4 and the chuck 1 advance. Thus, the shortened remaining core 3 in the tip member 9 is discharged and the next core 3 is projected from the tip of the tip member 9.

図６は本発明の軸筒と押圧部材における実施例２を示したものである。尚、図１と同一部材は同一の符号を付してその説明を省略する。軸筒１０８の後部内面に内鍔１０８Ｃを形成し、この内鍔１０８Ｃに切欠部１０８Ｄを形成する。更に、内鍔１０８Ｃの切欠部１０８Ｄの縁より前方に突出する土手部１０８Ｆを形成する。   FIG. 6 shows Example 2 in the shaft cylinder and the pressing member of the present invention. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. An inner flange 108C is formed on the inner surface of the rear portion of the shaft cylinder 108, and a notch 108D is formed in the inner flange 108C. Further, a bank portion 108F that protrudes forward from the edge of the notch portion 108D of the inner collar 108C is formed.

この軸筒１０８に、リターンスプリング１５を筒部１４Ａに外嵌した押圧部材１４を挿入し、押圧部材１４の係止突起１４Ｂを軸筒１０８の内鍔１０８Ｃに形成した切欠部１０８Ｄを挿通して土手部１０８Ｆの前方に位置させた後、押圧部材１４を適宜回転させて突部１４Ｃを軸筒１０８のキー溝１０８Ｅに係合させ、軸筒１０８に対して押圧部材１４を長手方向には摺動可能でかつ回動不能に取り付ける。   The pressing member 14 having the return spring 15 fitted on the cylinder portion 14A is inserted into the shaft cylinder 108, and the locking projection 14B of the pressing member 14 is inserted through the notch portion 108D formed on the inner flange 108C of the shaft cylinder 108. After being positioned in front of the bank portion 108F, the pressing member 14 is appropriately rotated to engage the protrusion 14C with the key groove 108E of the shaft tube 108, and the pressing member 14 is slid in the longitudinal direction with respect to the shaft tube 108. It is movable and cannot be rotated.

前記リターンスプリング１５が軸筒１０８の内鍔１０８Ｃと押圧部材１４の外段１４Ｆとの間に３５０ｇ程度の取付時荷重で取り付けられることにより、通常押圧部材１４は長手方向後方に付勢され、押圧部材１４の係止突起１４Ｂが軸筒１０８の内鍔１０８Ｃに当接される。この時、押圧部材１４は突部１４Ｃが軸筒１０８のキー溝１０８Ｅに係合されて回動不能となっているとともに、押圧部材１４の係止突起１４Ｂが軸筒１０８の土手部１０８Ｆにより係合されているので、押圧部材１４に重量体１２が当接して衝撃を受けても、係止突起１４Ｂは内鍔１０８Ｃの切欠部１０８Ｄから外れてしまう恐れは全くない。また、係止突起１４Ｂは撓まないので、内鍔１０８Ｃとの係止が外れてしまう恐れもない。   When the return spring 15 is mounted between the inner flange 108C of the shaft tube 108 and the outer stage 14F of the pressing member 14 with a load at the time of mounting of about 350 g, the normal pressing member 14 is normally urged rearward in the longitudinal direction. The locking projection 14B of the member 14 is brought into contact with the inner collar 108C of the shaft tube 108. At this time, the pressing member 14 is unable to rotate because the protrusion 14C is engaged with the key groove 108E of the shaft tube 108, and the locking projection 14B of the pressing member 14 is engaged by the bank portion 108F of the shaft tube 108. Therefore, even if the weight body 12 comes into contact with the pressing member 14 and receives an impact, there is no possibility that the locking projection 14B is detached from the notch 108D of the inner collar 108C. Further, since the locking projection 14B does not bend, there is no possibility that the locking with the inner collar 108C is released.

図７及び図８は本発明の軸筒と押圧部材における実施例３を示したものである。尚、図１と同一部材は同一の符号を付してその説明を省略する。軸筒２０８の後部内面に内段２０８Ｇを形成し、この内段２０８Ｇから前方に伸びた切欠部２０８Ｄを形成する。更に、前記切欠部２０８Ｄと連通してカム窓２０８Ｈを構成する。このカム窓２０８Ｈは軸筒２０８に一体に形成されたクリップ１１３の下側に位置しクリップ１１３によって覆われて構成される。このカム窓２０８Ｈの前縁２０８Ｉは、右回転方向に向かって前方に傾斜して構成され、後縁２０８Ｊは軸心方向と垂直に構成される。この軸筒２０８の内段２０８Ｇ後方に後端より長手方向前方に伸びたキー溝２０８Ｅを構成する。   7 and 8 show a third embodiment of the shaft tube and the pressing member of the present invention. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. An inner stage 208G is formed on the rear inner surface of the shaft cylinder 208, and a notch 208D extending forward from the inner stage 208G is formed. Further, a cam window 208H is formed in communication with the notch 208D. The cam window 208 </ b> H is positioned below the clip 113 formed integrally with the shaft cylinder 208 and is covered with the clip 113. The front edge 208I of the cam window 208H is configured to be inclined forward in the right rotation direction, and the rear edge 208J is configured to be perpendicular to the axial direction. A key groove 208E extending forward in the longitudinal direction from the rear end is formed behind the inner stage 208G of the shaft cylinder 208.

この軸筒２０８に、リターンスプリング１５を筒部１４Ａに外嵌した押圧部材１４を挿入し、押圧部材１４の係止突起１４Ｂを軸筒２０８の切欠部２０８Ｄを挿通してカム窓２０８Ｈに挿入し、係止突起１４Ｂをカム窓２０８Ｈの前縁２０８Ｉに当接すると、係止突起１４Ｂは前縁２０８Ｉの傾斜面に沿って右回転する。すると、押圧部材１４の突部１４Ｃが軸筒２０８のキー溝２０８Ｅに係合し、軸筒２０８に対して押圧部材１４を長手方向には摺動可能でかつ回動不能に取り付ける。   The pressing member 14 having the return spring 15 fitted on the cylindrical portion 14A is inserted into the shaft cylinder 208, and the locking projection 14B of the pressing member 14 is inserted through the notch 208D of the shaft cylinder 208 and inserted into the cam window 208H. When the locking projection 14B comes into contact with the front edge 208I of the cam window 208H, the locking projection 14B rotates right along the inclined surface of the front edge 208I. Then, the protrusion 14C of the pressing member 14 engages with the key groove 208E of the shaft cylinder 208, and the pressing member 14 is slidable in the longitudinal direction and attached to the shaft cylinder 208 so as not to rotate.

前記リターンスプリング１５が軸筒２０８の内段２０８Ｇと押圧部材１４の外段１４Ｆとの間に３５０ｇ程度の取付時荷重で取り付けられることにより、通常押圧部材１４は長手方向後方に付勢され、押圧部材１４の係止突起１４Ｂが軸筒２０８のカム窓２０８Ｈの後縁２０８Ｊに当接される。この時、押圧部材１４は突部１４Ｃが軸筒２０８のキー溝２０８Ｅに係合されて回動不能となっているので、係止突起１４Ｂは切欠部２０８Ｄから外れてしまう恐れはない。また、係止突起１４Ｂは撓まないので、カム窓２０８Ｈの後端２０８Ｊとの係止が外れてしまう恐れもない。   When the return spring 15 is mounted between the inner stage 208G of the shaft cylinder 208 and the outer stage 14F of the pressing member 14 with a load at the time of mounting of about 350 g, the normal pressing member 14 is normally urged rearward in the longitudinal direction. The locking protrusion 14B of the member 14 is brought into contact with the rear edge 208J of the cam window 208H of the shaft cylinder 208. At this time, since the protrusion 14C is engaged with the key groove 208E of the shaft cylinder 208 and the pressing member 14 cannot rotate, there is no possibility that the locking protrusion 14B is detached from the notch 208D. Further, since the locking projection 14B does not bend, there is no possibility that the locking with the rear end 208J of the cam window 208H is released.

この実施例３の場合は、軸筒２０８の後方から押圧部材１４を挿入するのみで、係止突起１４Ｂがカム窓２０８Ｈの傾斜した前縁２０８Ｉに沿って移動し押圧部材１４が回転するので、押圧部材１４に回転方向への力を加えることなく軸筒２０８に取り付けることができる利点が得られる。また、軸筒２０８に設けられたカム窓２０８Ｈはクリップ１１３によって覆われているので、外観を損なう恐れもない。   In the case of the third embodiment, simply by inserting the pressing member 14 from the rear of the shaft cylinder 208, the locking projection 14B moves along the inclined front edge 208I of the cam window 208H and the pressing member 14 rotates. There is an advantage that the pressing member 14 can be attached to the shaft cylinder 208 without applying a force in the rotational direction. In addition, since the cam window 208H provided in the shaft cylinder 208 is covered with the clip 113, there is no possibility of damaging the appearance.

尚、本発明は上記実施例に限定されるものではなく、軸筒、芯タンク、押圧部材といった部材は説明を簡略化するためにそれぞれ１個の部品として図示しているが、それぞれ２個以上の部品を螺合、嵌合して一体化すればよい。また、コネクターと芯タンクを一体に構成することも可能である。   Note that the present invention is not limited to the above-described embodiment, and the members such as the shaft cylinder, the core tank, and the pressing member are illustrated as one component for simplification of the description. These parts may be integrated by screwing and fitting. It is also possible to configure the connector and the core tank integrally.

リターンスプリングにより長手方向後方に付勢されかつ重量体が当接される押圧部材を簡単に軸筒に取り付けることができ、かつ、重量体が当接しても押圧部材が外れる恐れがない振出式シャープペンシルに適用できる。   A push-out type sharp that can be easily attached to the shaft tube and pressed against the weight body by the return spring in the longitudinal direction and that does not come off even if the weight body makes contact. Applicable to pencil.

１ チャック
３ 芯
８ 軸筒
８Ｃ 軸筒８の内鍔
８Ｄ 軸筒８の切欠部
８Ｅ 軸筒８のキー溝
１２ 重量体
１４ 押圧部材
１４Ｂ 押圧部材１４の係止突起
１４Ｃ 押圧部材１４の突部
１５ リターンスプリング
１０８ 軸筒
１０８Ｃ 軸筒１０８の内鍔
１０８Ｄ 軸筒１０８の切欠部
１０８Ｅ 軸筒１０８のキー溝
２０８ 軸筒
２０８Ｄ 軸筒２０８の切欠部
２０８Ｅ 軸筒２０８のキー溝
２０８Ｇ 軸筒２０８の内段
２０８Ｈ 軸筒２０８のカム窓
２０８Ｉ 軸筒２０８の前縁
２０８Ｊ 軸筒２０８の後縁 DESCRIPTION OF SYMBOLS 1 Chuck 3 core 8 Shaft cylinder 8C Inner collar 8D of the shaft cylinder 8 Notch part of the shaft cylinder 8E Key groove of the shaft cylinder 8 12 Weight body 14 Press member 14B Locking protrusion 14C of the pressing member 14C Projection 15 of the press member 14 Return spring 108 Shaft barrel 108C Shaft barrel 108D Shaft barrel 108 notch 108E Shaft barrel 108 key groove 208 Shaft barrel 208D Shaft barrel 208 notch 208E Shaft barrel 208 key groove 208G Shaft barrel 208 inner stage 208H Cam window of shaft cylinder 208I Front edge of shaft cylinder 208J Rear edge of shaft cylinder 208

Claims (2)

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、軸筒に内鍔を形成するとともにその内鍔に切欠部を形成し、前記軸筒の内鍔後方に長手方向に伸びたキー溝を構成し、更に、押圧部材に前記切欠部を挿通可能な係止突起を構成するとともに押圧部材に撓み可能な突部を構成し、押圧部材を軸筒の後方から挿入して係止突起が軸筒の切欠部を挿通した後、押圧部材を適宜回転させて前記突部を軸筒のキー溝に長手方向には摺動可能でかつ回動不能に係合させ、リターンスプリングによって押圧部材が後方に付勢された時、係止突起が軸筒の内鍔に当接されることを特徴とする振出式シャープペンシル。   In the swing-out mechanical pencil that advances the chuck by the inertial force of the heavy body and feeds the lead, an inner flange is formed in the shaft cylinder and a notch is formed in the inner flange, and the longitudinal direction is formed in the longitudinal direction behind the inner flange of the shaft cylinder. An extended keyway is formed, a locking projection that allows the pressing member to be inserted through the cutout portion is formed, and a protruding portion that can be bent is formed on the pressing member, and the pressing member is inserted from the rear of the shaft tube. After the locking projection is inserted through the notch of the shaft cylinder, the pressing member is appropriately rotated to engage the protrusion with the key groove of the shaft cylinder in the longitudinal direction and non-rotatably, and a return spring. When the pressing member is urged rearward by the above-mentioned, the swinging mechanical pencil is characterized in that the locking projection comes into contact with the inner collar of the shaft tube. 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、軸筒に内段を形成するとともにその内段から前方に伸びた切欠部を形成し、前記切欠部と連通してカム窓を構成し、このカム窓の前縁を傾斜させて構成し、前記軸筒の内段後方に長手方向に伸びたキー溝を構成し、更に、押圧部材に前記切欠部を挿通可能な係止突起を構成するとともに押圧部材に撓み可能な突部を構成し、押圧部材を軸筒の後方から挿入して係止突起を軸筒のカム窓に挿入し、係止突起をカム窓の傾斜した前縁に当接させて押圧部材を適宜回転させ、前記突部を軸筒のキー溝に長手方向には摺動可能でかつ回動不能に係合させ、リターンスプリングによって押圧部材が後方に付勢された時、係止突起が軸筒のカム窓後縁に当接させることを特徴とする振出式シャープペンシル。   In the swing-out mechanical pencil that advances the chuck by the inertial force of the heavy body and feeds the lead, an inner stage is formed in the shaft cylinder and a notch extending forward from the inner stage is formed and communicated with the notch A cam window is formed, the front edge of the cam window is inclined, a key groove extending in the longitudinal direction is formed behind the inner stage of the shaft tube, and the notch can be inserted into the pressing member. A locking projection is formed and a pressing portion is formed on the pressing member. The pressing member is inserted from the rear side of the shaft tube, the locking projection is inserted into the cam tube of the shaft tube, and the locking projection is inserted into the cam window. The pressing member is appropriately rotated by contacting the inclined front edge, and the protrusion is engaged with the key groove of the shaft cylinder in a longitudinally slidable and non-rotatable manner, and the pressing member is moved backward by a return spring. When the urging force is applied, the locking projection is brought into contact with the cam window rear edge Drawer-type mechanical pencil, characterized in that.
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