JP2011131390A

JP2011131390A - Knock type mechanical pencil

Info

Publication number: JP2011131390A
Application number: JP2009290195A
Authority: JP
Inventors: Yoshio Kaneko; 芳雄兼子
Original assignee: Pilot Corp
Current assignee: Pilot Corp
Priority date: 2009-12-22
Filing date: 2009-12-22
Publication date: 2011-07-07

Abstract

PROBLEM TO BE SOLVED: To provide a knock type mechanical pencil which can give sufficient cushioning force when a writing pressure generated by the pressing of a lead 2 to a paper surface, is received by a cushion, and can protect the lead 2 without disturbing writing by interlocking the lead guide 9 with the transfer of the lead 2. SOLUTION: The knock type mechanical pencil includes the cushion constructed of a cushioning member 6 attached to a connector 5 which receives a fastener 4 fitted outwardly to a head part 1A of a chuck 1. Further, a lead holder 10 is fixed to the lead guide 9, then the lead guide 9 and the lead holder 10 are slidably built in the longitudinal direction inside an apex member 8, and thus, the lead holding power of the lead holder 10 can be made stronger than the frictional force between the lead holder 10 and the apex member 8. COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、芯を保持する機構部と軸筒との間に緩衝装置を設けるとともに、芯をガイドする芯ガイドを長手方向に摺動可能に設けたノック式シャープペンシルに関するものである。 The present invention relates to a knock type mechanical pencil in which a shock absorber is provided between a mechanism portion for holding a lead and a shaft tube, and a lead guide for guiding the lead is slidable in a longitudinal direction.

従来、軸筒の下端に大径孔を設けて軸筒の中心孔との間に段部を形成し、大径孔の下方内周面には雌螺糸孔を設け、大径孔内には中心孔を開けた弾性板（クッション部材）を取付け、この弾性板の下面はチャックの締環（締具）を、又上面には座板を重ね押出管との間にばねを取付けて座板で弾性板を弾圧し、更に先金（先部材）の上端の外周に雄螺糸を設けた雄螺筒を形成して、前記雌螺糸孔に螺入、螺脱の方向に回動して弾性板を段部とばねの弾発力で押圧されている座板及び雄螺筒の上端面と大径孔との間で圧縮又元の状態に膨張ができるように構成した押出式機構鉛筆が知られている。（特許文献１参照） Conventionally, a large-diameter hole is provided at the lower end of the shaft cylinder and a step portion is formed between the central hole of the shaft cylinder, and a female screw hole is provided on the lower inner peripheral surface of the large-diameter hole. Attaches an elastic plate (cushion member) with a central hole, the lower surface of this elastic plate is a chuck ring (clamp), and a seat plate is placed on the upper surface and a spring is attached between the tube and the seat. The elastic plate is elastically pressed by the plate, and a male screw cylinder with a male screw is formed on the outer periphery of the upper end of the tip (tip member), and the screw is inserted into the female screw hole and rotated in the screwing direction. The elastic plate is an extruding type that can be compressed or expanded to the original state between the step plate and the seat plate pressed by the elastic force of the spring and the upper end surface of the male screw cylinder and the large-diameter hole. Mechanical pencils are known. (See Patent Document 1)

しかしながら、上記押出式機構鉛筆は弾性板の締環が押圧される部分が変形してしまうために弾力が弱くなってしまうとともに、長手方向以外の周方向にも変形してしまい、適宜の緩衝力が得られないという問題があった。 However, the above-mentioned extrusion type mechanical pencil is deformed in the circumferential direction other than the longitudinal direction because the portion of the elastic plate that is pressed against the elastic ring is deformed. There was a problem that could not be obtained.

また、先金（先部材）に芯ガイドを軸方向に移動可能に嵌挿支持し、芯ガイドの後端には筒体（中駒）および摩擦部材（芯ホルダー）を固定し、この摩擦部材を、芯との間の摩擦抵抗の方が先金との間の摩擦抵抗よりも小さく構成したシャープペンシルが知られている。（特許文献２） Further, the lead guide (tip member) is inserted into and supported by the lead guide so as to be movable in the axial direction, and a cylindrical body (medium piece) and a friction member (lead holder) are fixed to the rear end of the lead guide. A mechanical pencil is known in which the frictional resistance between the lead and the core is smaller than the frictional resistance between the lead and the tip. (Patent Document 2)

このシャープペンシルは、筆記中の芯が摩減して突出長さが不足になった場合には、芯の先端を紙面等に押しつける操作を行うことによって、芯を保持しているリードチャック（チャック）およびこれと一体的な内筒（芯タンク）に後退方向の押圧力が作用して後退するが、芯ガイドと摩擦部材も紙面に押されて後退する。次に、芯および芯ガイドへの押圧を解除すると、スプリングの復元力によって、芯は前進して元の位置に復帰するが、摩擦部材と先金との間の摩擦抵抗が摩擦部材と芯との摩擦抵抗より大きいため芯ガイドは前進しない。したがって、芯ガイドの後退量だけ芯を芯ガイドから突出させる。 This mechanical pencil has a lead chuck (chuck) that holds the lead by pressing the tip of the lead against the surface of the paper, etc. when the writing lead is worn away and the protruding length becomes insufficient. ) And the inner cylinder (core tank) integrated therewith, and the retracting force acts on the inner cylinder (core tank), the core guide and the friction member are also pressed against the paper surface to move backward. Next, when the pressure on the core and the core guide is released, the core moves forward and returns to the original position by the restoring force of the spring, but the frictional resistance between the friction member and the tip is reduced by the friction member and the core. The lead guide does not move forward because it is greater than the frictional resistance. Therefore, the lead is protruded from the lead guide by the retraction amount of the lead guide.

しかしながら、上記シャープペンシルは、緩衝装置を働かせて芯を後退させながら筆記しようとした場合には、芯ガイド内に芯が潜ってしまい非常に筆記しにくくなってしまうものであった。 However, when the above-mentioned mechanical pencil tries to write while retracting the lead by using a shock absorber, the lead is buried in the lead guide and becomes very difficult to write.

実公昭５３−１０９９１号公報Japanese Utility Model Publication No. 53-10991 実公昭６１−２３４３８号公報Japanese Utility Model Publication No. 61-23438

解決しようとする問題点は、芯が紙面に押されることによって発生する筆圧を緩衝装置によって受けた時、十分な緩衝力が得られない点と、芯をガイドして芯の折損を防ぐための芯ガイド内に芯が没入してしまって筆記しにくい点である。 The problem to be solved is that when the writing pressure generated by pressing the core against the paper surface is received by the shock absorber, a sufficient buffering force cannot be obtained, and the core is guided to prevent breakage of the core. It is difficult to write because the lead is immersed in the lead guide.

本発明は、軸筒の前部に先部材を設け、この先部材内に芯をガイドするための芯ガイドを長手方向に摺動可能に内蔵し、この芯ガイドに固定された芯ホルダーを先部材の内面に摩擦接触させるとともに芯ホルダーにより芯を保持したノック式シャープペンシルにおいて、チャックの頭部に締具を外嵌し、この締具を受ける連結具にクッション部材を設けて緩衝装置を構成し、かつ前記芯ホルダーの芯保持力を芯ホルダーと先部材の摩擦力より大きく構成したことを第１の特徴とする。 In the present invention, a tip member is provided at the front portion of the shaft tube, and a lead guide for guiding the lead in the tip member is slidably incorporated in the longitudinal direction, and a lead holder fixed to the lead guide is provided as the lead member. In a knock-type mechanical pencil that is brought into frictional contact with the inner surface of the chuck and the core is held by a core holder, a fastener is externally fitted to the head of the chuck, and a cushioning member is provided on the connecting tool that receives the fastener to constitute a shock absorber. The first feature is that the lead holding force of the lead holder is greater than the friction force between the lead holder and the tip member.

また、連結具にクッション部材を２色成形により構成して緩衝装置を構成し、かつ、クッション部材と軸筒のどちらか一方に突部を形成するとともに、この突部を他方に押圧させて構成したことを第２の特徴とする。 Further, the cushioning device is configured by forming the cushion member on the coupler by two-color molding, and the projection is formed on one of the cushion member and the shaft tube, and the projection is pressed against the other. This is the second feature.

更に、連結具の前部に外鍔を形成するとともに外鍔後方に突部を形成し、更に連結具の後筒部に長手方向に伸びた***部を相対位置に形成し、この連結具にクッション部材を２色成形により構成し、前記クッション部材に長手方向後方に突出した突部を相対位置に形成して緩衝装置を構成し、クッション部材の突部を軸筒に押圧して構成したことを第３の特徴とする。 Further, an outer flange is formed at the front part of the connecting tool, a protrusion is formed at the rear of the outer casing, and a protruding portion extending in the longitudinal direction is formed at a relative position on the rear tube part of the connecting tool. The cushion member is formed by two-color molding, and the cushion member is configured by forming a protrusion projecting rearward in the longitudinal direction on the cushion member, and configured by pressing the protrusion of the cushion member against the shaft cylinder. Is the third feature.

本発明は、芯が紙面に押されることによって発生する筆圧を緩衝装置によって受けた時に、確実かつ十分な緩衝力が得られ、柔らかい筆記感で筆記が行えるとともに、芯をガイドする芯ガイドが芯の揺動と連動して移動するので、芯ガイドが邪魔にならずかつ確実に芯折れも防止する利点が得られるものである。 The present invention provides a core guide that guides the lead while being able to write with a soft writing feeling when a shock is generated by the shock absorber generated when the lead is pressed against the paper surface by the shock absorber. Since it moves in conjunction with the swinging of the lead, the lead guide does not get in the way and the advantage of reliably preventing the lead from breaking can be obtained.

図１は本発明の実施例１のノック式シャープペンシルを示す主要部断面図である。（実施例１）FIG. 1 is a cross-sectional view of the main part showing a knock type mechanical pencil of Example 1 of the present invention. Example 1 図２は、図１の連結具を示す正面図である。（実施例１）FIG. 2 is a front view showing the connector of FIG. Example 1 図３は、図１の緩衝装置を示す正面図である。（実施例１）FIG. 3 is a front view showing the shock absorber of FIG. Example 1 図４は、図３のＡ−Ａ線を示す断面図である。（実施例１）4 is a cross-sectional view taken along line AA of FIG. Example 1 図５は、図１の緩衝装置を示す平面図である。（実施例１）FIG. 5 is a plan view showing the shock absorber shown in FIG. Example 1 図６は、図１の軸筒を示す主要部断面図である。（実施例１）6 is a cross-sectional view of the main part showing the shaft tube of FIG. Example 1 図７は、図６のＡ−Ａ線を示す主要部断面図である。（実施例１）FIG. 7 is a cross-sectional view of the main part showing the AA line in FIG. 6. Example 1 図８は実施例１のノック式シャープペンシルにおける緩衝状態の緩衝装置と軸筒を示す主要部平面図である。（実施例１）FIG. 8 is a plan view of the main part showing the shock absorbing device and the shaft tube in the shock absorbing state in the knock mechanical pencil of the first embodiment. Example 1 図９は実施例１のノック式シャープペンシルにおける芯が紙面に押されて後退した状態を示す主要部断面図である。（実施例１）FIG. 9 is a cross-sectional view of the main part showing a state in which the core of the knock mechanical pencil of Example 1 is pushed back by the paper surface. Example 1 図１０は実施例１のノック式シャープペンシルにおける非緩衝状態の緩衝装置と軸筒を示す主要部平面図である。（実施例１）FIG. 10 is a main part plan view showing a shock absorber and a shaft cylinder in a non-buffer state in the knock mechanical pencil of the first embodiment. Example 1 図１１は軸筒の突部をクッション部材に押圧した実施例２を示す主要部断面図である。（実施例２）FIG. 11 is a cross-sectional view of the main part showing Embodiment 2 in which the projection of the shaft cylinder is pressed against the cushion member. (Example 2) 図１２は実施例３のノック式シャープペンシルにおける芯ガイドと芯ホルダーを示す断面図である。（実施例３）FIG. 12 is a cross-sectional view illustrating a lead guide and a lead holder in the knock mechanical pencil of the third embodiment. Example 3

芯が紙面に押された時、芯とともに芯ガイドが連動して移動し、芯ガイドが邪魔にならず柔らかい筆記感で筆記が行える筆記具を実現した。 When the lead is pressed against the paper surface, the lead guide moves in conjunction with the lead, realizing a writing instrument that can write with a soft writing feeling without disturbing the lead guide.

以下、図１、図２、図３、図４、図５、図６、図７、図８、図９及び図１０に基づいて本発明における実施例１のノック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に予備の芯２を収納した芯タンク３を連結する。更に、チャック１の頭部１Ａに締具４を外嵌する。この締具４を受け止める連結具５は前部に外鍔５Ａを形成するとともに後筒部５Ｂに長手方向後方に伸びた***部５Ｃを相対位置に形成する。更に、この***部５Ｃの後部に突部５Ｄを形成する。また、***部５Ｃと９０度円周方向に角度がずれた位置に後部が台形に形成された開口窓５Ｅを対向させて形成する。更に、前記連結具５の後筒部５Ｂには突部５Ｄより長手方向後方に伸びたリブ５Ｆを形成する。この合成樹脂で構成された連結具５に、接着性シリコン、エラストマー等の弾性部材によりクッション部材６が２色成形で形成され、緩衝装置が構成される。前記クッション部材６のゴム硬度は、略５以上かつ略５０以下が好ましい。このクッション部材６は前記連結具５の外鍔５Ａと突部５Ｄの間に形成されるが、長手方向後方に突出する突部６Ａが前記連結具５の開口窓５Ｅを貫通して相対位置に構成される。このクッション部材６の突部６Ａは前記連結具５の開口窓５Ｅと略同形でやや小さく構成され、かつ、その後端は前記連結具５の突部５Ｄの後端と略同一円周上に位置している。更に、図示していないが芯タンク３の後部に消しゴムが着脱可能に取り付けられるとともに、消しゴムを覆うノブが芯タンク３の後部外側に着脱可能に嵌合され、ノック式シャープペンシルの機構部が構成される。 Hereinafter, the knock type mechanical pencil according to the first embodiment of the present invention will be described with reference to FIGS. 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. Moreover, let the left side of FIG. 1 be the front, and let the right side be back. First, the lead tank 3 containing the spare lead 2 is connected to the chuck 1. Further, the fastener 4 is fitted on the head 1 A of the chuck 1. The connector 5 that receives the fastener 4 forms an outer collar 5A at the front portion and a raised portion 5C that extends rearward in the longitudinal direction at the rear cylinder portion 5B. Further, a protrusion 5D is formed at the rear of the raised portion 5C. Further, an opening window 5E having a rear portion formed in a trapezoidal shape is opposed to the raised portion 5C at a position shifted in the circumferential direction by 90 degrees. Further, a rib 5F extending rearward in the longitudinal direction from the protrusion 5D is formed on the rear cylinder portion 5B of the connector 5. The cushion member 6 is formed by two-color molding with an elastic member such as adhesive silicon or elastomer on the connector 5 made of this synthetic resin to constitute a shock absorber. The rubber hardness of the cushion member 6 is preferably about 5 or more and about 50 or less. The cushion member 6 is formed between the outer flange 5A and the protrusion 5D of the connector 5, and the protrusion 6A protruding rearward in the longitudinal direction passes through the opening window 5E of the connector 5 and is in a relative position. Composed. The protrusion 6A of the cushion member 6 is substantially the same shape as the opening window 5E of the connector 5 and is configured to be slightly smaller, and the rear end thereof is located on substantially the same circumference as the rear end of the protrusion 5D of the connector 5. is doing. Further, although not shown, an eraser is detachably attached to the rear part of the lead tank 3, and a knob covering the eraser is detachably fitted to the rear part of the lead tank 3 so as to constitute a mechanical part of the knock type mechanical pencil. Is done.

軸筒７は、前端より長手方向後方に切り欠かれた凹部７Ａが相対位置に形成され、更に、凹部７Ａから長手方向後方に伸びた位置に互いに相対する凹溝７Ｂを形成するとともに、前記凹溝７Ｂと９０度円周方向に角度がずれた位置にも互いに相対する長凹溝７Ｃが形成される。 The shaft tube 7 is formed with a recess 7A cut out in the longitudinal direction rearward from the front end at a relative position. Further, the shaft tube 7 is formed with concave grooves 7B facing each other at a position extending rearward in the longitudinal direction from the recess 7A. Long concave grooves 7C facing each other are also formed at positions where the angles are shifted from the grooves 7B by 90 degrees in the circumferential direction.

この軸筒７の前方から前記ノック式シャープペンシルの機構部を挿入し、軸筒７の後端より消しゴム及びノブを突出させる。また、連結具５の突部５Ｄを軸筒７の凹部７Ａに長手方向に一致させるとともに、連結具５のリブ５Ｆを軸筒７の凹溝７Ｂに長手方向に摺動可能に挿入する。更に、クッション部材６の突部６Ａが軸筒７の前端に当接され、図８に示した状態となる。 The mechanical part of the knock type mechanical pencil is inserted from the front of the shaft cylinder 7, and the eraser and the knob are projected from the rear end of the shaft cylinder 7. Further, the protrusion 5D of the connector 5 is made to coincide with the concave portion 7A of the shaft cylinder 7 in the longitudinal direction, and the rib 5F of the connector 5 is inserted into the concave groove 7B of the shaft cylinder 7 so as to be slidable in the longitudinal direction. Further, the protrusion 6A of the cushion member 6 is brought into contact with the front end of the shaft cylinder 7, and the state shown in FIG.

この軸筒７に先部材８を着脱可能に螺合し、先部材８の内段８Ａに連結具５の前端を接触させる。また、先部材８の係止段８Ｂと連結具５の前端の間を締具４が長手方向に摺動可能に構成する。また、芯２をガイドする芯ガイド９の後部には芯ホルダー１０が圧入固着されて固定される。この芯ホルダー１０は合成樹脂で構成され、外弾性片１０Ａと内弾性片１０Ｂが形成されている。前記芯ガイド９と芯ホルダー１０は先部材８内に長手方向に摺動可能に内蔵され、芯ガイド９の先端が先部材８の前端より突出している。更に、芯ホルダー１０の外弾性片１０Ａは先部材８の内面に摩擦接触する。この芯ホルダー１０の内弾性片１０Ｂは芯９を保持しているが、内弾性片１０Ｂの芯保持力は外弾性片１０Ａと先部材８の摩擦力より大きく構成する。 The tip member 8 is detachably screwed onto the shaft tube 7, and the front end of the connector 5 is brought into contact with the inner stage 8 A of the tip member 8. Further, the fastener 4 is configured to be slidable in the longitudinal direction between the locking step 8B of the tip member 8 and the front end of the connector 5. A lead holder 10 is press-fitted and fixed to the rear portion of the lead guide 9 that guides the lead 2. The core holder 10 is made of synthetic resin, and is formed with an outer elastic piece 10A and an inner elastic piece 10B. The lead guide 9 and the lead holder 10 are incorporated in the tip member 8 so as to be slidable in the longitudinal direction, and the tip of the lead guide 9 projects from the front end of the tip member 8. Further, the outer elastic piece 10 A of the core holder 10 is in frictional contact with the inner surface of the tip member 8. The inner elastic piece 10B of the core holder 10 holds the core 9, but the inner elastic piece 10B has a core holding force larger than the frictional force between the outer elastic piece 10A and the tip member 8.

以上説明したノック式シャープペンシルは、先部材８の先端から芯ガイド９を突出させるとともに芯ガイド９から芯２を突出させ、この芯２で紙面等に筆記を行う。この時、芯２に加えられた筆圧はチャック１及び締具４を介して連結具５に伝達されるが、連結具５は筆圧を加えられた時から徐々にクッション部材６の突部６Ａを圧縮するので、筆圧が加えられた時から筆圧を吸収して芯２および芯ガイド９が後退して図９に示した状態となり、柔らかい筆記感で筆記を行うことができる。この時、クッション部材６の突部６Ａは連結具５の開口窓５Ｅを貫通して連結具５の後筒部５Ｂ表面に密着していないので、クッション部材６の突部６Ａは確実に変形して圧縮される。また、クッション部材６は連結具５の***部５Ｃに被せられて固定されるとともに突部６Ａが連結具５の開口窓５Ｅに貫通して回転が防止されるので、長手方向にのみ変形して設定された緩衝力で圧縮される。尚、連結具５はリブ５Ｆが軸筒７の凹溝７Ｂに挿入されて摺動するので、軸筒７に対して連結具５は回転しない。しかも、芯２が後退する時に芯２と連動して芯ガイド９も後退するので、芯２が芯ガイド９から突出している長さに変化はなく、筆記がしにくくなってしまう心配もない。更に、芯２は芯ガイド９にガイドされているので折損の恐れも生じない。 The knock type mechanical pencil described above causes the lead guide 9 to protrude from the tip of the tip member 8 and the lead 2 to protrude from the lead guide 9, and writing is performed on the paper surface or the like with the lead 2. At this time, the writing pressure applied to the core 2 is transmitted to the connector 5 via the chuck 1 and the fastener 4, and the connector 5 gradually protrudes from the cushion member 6 when the writing pressure is applied. Since 6A is compressed, the writing pressure is absorbed from the time when the writing pressure is applied, and the lead 2 and lead guide 9 are retracted to the state shown in FIG. 9, and writing can be performed with a soft writing feeling. At this time, since the protrusion 6A of the cushion member 6 does not penetrate the opening window 5E of the connector 5 and is in close contact with the surface of the rear cylinder portion 5B of the connector 5, the protrusion 6A of the cushion member 6 is reliably deformed. Compressed. Further, since the cushion member 6 is fixed by being covered with the raised portion 5C of the connector 5, and the protrusion 6A penetrates the opening window 5E of the connector 5 to prevent rotation, the cushion member 6 is deformed only in the longitudinal direction. It is compressed with the set buffering force. In addition, since the rib 5F is inserted into the concave groove 7B of the shaft tube 7 and slides, the connector 5 does not rotate with respect to the shaft tube 7. Moreover, since the lead guide 9 is also moved back in conjunction with the lead 2 when the lead 2 is retracted, there is no change in the length of the lead 2 protruding from the lead guide 9, and there is no fear that writing will be difficult. Furthermore, since the lead 2 is guided by the lead guide 9, there is no risk of breakage.

また、連結具５を固定したい場合には、軸筒７より先部材８を外し、連結具５のリブ５Ｆを軸筒７の長凹溝７Ｃに挿入するとともに、連結具５の突部５Ｄを軸筒７の前端に当接する。また、クッション部材６の突部６Ａは軸筒７の凹部７Ａと長手方向に一致し、図１０に示した状態となる。 Further, when it is desired to fix the connector 5, the tip member 8 is removed from the shaft tube 7, the rib 5 F of the connector 5 is inserted into the long concave groove 7 C of the shaft tube 7, and the protrusion 5 D of the connector 5 is inserted. It contacts the front end of the shaft cylinder 7. Further, the protrusion 6A of the cushion member 6 coincides with the concave portion 7A of the shaft cylinder 7 in the longitudinal direction, and is in the state shown in FIG.

この図１０の状態で筆記を行った場合は、連結具５の突部５Ｄが軸筒７の前端に当接されているので、芯２に加えられた筆圧がチャック１、締具４及び連結具５を介して軸筒７で直接受けられ、筆記中は芯２が確実に固定されて筆記を行うことができる。 When writing is performed in the state of FIG. 10, since the protrusion 5D of the connector 5 is in contact with the front end of the shaft cylinder 7, the writing pressure applied to the core 2 is applied to the chuck 1, the fastener 4, and It can be directly received by the shaft cylinder 7 via the connector 5, and the writing can be performed with the core 2 securely fixed during writing.

以下、図１１に基づいて本発明における実施例２を説明する。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。先ず、円筒状の連結具１０５の前端に外鍔１０５Ａを形成し、この連結具１０５の外鍔１０５Ａに密着させて弾性を有するクッション部材１０６を２色成形により構成する。また、軸筒１０７の前端に長手方向前方に突出する突部１０７Ｄを相対位置に形成する。 The second embodiment of the present invention will be described below with reference to FIG. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, an outer casing 105A is formed at the front end of the cylindrical connector 105, and a cushion member 106 having elasticity by being in close contact with the outer casing 105A of the connector 105 is formed by two-color molding. Further, a protrusion 107D protruding forward in the longitudinal direction is formed at the front end of the shaft tube 107 at a relative position.

この軸筒１０７の前方より前記連結具１０５を挿入し、クッション部材１０６の後端に軸筒１０７の突部１０７Ｄを接触させて構成する。したがって、芯に筆圧が加えられた場合には、軸筒１０７の突部１０７Ｄに押圧されてクッション部材１０６が変形し、芯と芯ガイドが後退することによって筆圧が吸収され柔らかい筆記感で筆記が行える。 The connector 105 is inserted from the front side of the shaft tube 107, and the protrusion 107D of the shaft tube 107 is brought into contact with the rear end of the cushion member 106. Therefore, when writing pressure is applied to the core, the cushion member 106 is deformed by being pressed by the protrusion 107D of the shaft tube 107, and the writing pressure is absorbed by the retraction of the core and the core guide, so that the writing feeling is soft. Can write.

以下、図１２に基づいて本発明における実施例３を説明する。先ず、芯ガイド９の後部に金属製または合成樹脂製の中駒１１を圧入固着し、この中駒１１にゴム製の芯ホルダー１１０を内蔵する。更に、この芯ホルダー１１０に先部材の内面と摩擦接触する外鍔１１０Ｃを形成する。この芯ホルダー１１０の内面で芯を保持するが、この芯ホルダー１１０による芯保持力は外鍔１１０Ｃと先部材の摩擦力より大きく構成する。 The third embodiment of the present invention will be described below with reference to FIG. First, a metal or synthetic resin middle piece 11 is press-fitted and fixed to the rear part of the lead guide 9, and a rubber core holder 110 is built in the middle piece 11. Further, an outer casing 110C that is in frictional contact with the inner surface of the tip member is formed on the core holder 110. The core is held by the inner surface of the core holder 110, and the core holding force by the core holder 110 is greater than the frictional force between the outer casing 110C and the tip member.

尚、本発明は上記実施例に限定されるものではなく、クッション部材の突部は台形に限らず半円形や長方形に形成しても良い。また、芯ガイド、中駒、芯ホルダー、軸筒、連結具、クッション部材、芯タンク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良い。 In addition, this invention is not limited to the said Example, You may form the protrusion part of a cushion member not only in trapezoid but in semicircle and a rectangle. In addition, the members such as the core guide, the center piece, the core holder, the shaft tube, the coupling tool, the cushion member, and the core tank are illustrated as one component for the sake of simplifying the description, but each of the two or more components is illustrated. Can be integrated by screwing and fitting.

芯が紙面に押されることによって発生する筆圧を緩衝装置によって受けた時に、確実かつ十分な緩衝力が得られ、柔らかい筆記感で筆記が行えるとともに、芯をガイドする芯ガイドが芯と連動して確実に芯を保護できるノック式シャープペンシルに適用できる。 When the pen pressure generated by the core being pressed against the paper surface is received by the shock absorber, a reliable and sufficient buffer force can be obtained, writing can be performed with a soft writing feeling, and the lead guide for guiding the lead is interlocked with the lead. It can be applied to knock type mechanical pencils that can protect the core reliably.

１チャック
１Ａチャック１の頭部
２芯
４締具
５連結具
５Ａ連結具５の外鍔
５Ｂ連結具５の後筒部
５Ｃ連結具５の***部
５Ｄ連結具５の突部
６クッション部材
６Ａクッション部材６の突部
７軸筒
８先部材
９芯ガイド
１０芯ホルダー
１０５連結具
１０５Ａ連結具１０５の外鍔
１０６クッション部材
１０７軸筒
１１０芯ホルダー DESCRIPTION OF SYMBOLS 1 Chuck 1A Head part of chuck 1 2 cores 4 Fastening tool 5 Connection tool 5A Outer side of connection tool 5B Rear cylinder part of connection tool 5C Raised part of connection tool 5D Projection part of connection tool 5 6 Cushion member 6A Cushion Projection of member 6 7 shaft cylinder 8 tip member 9 core guide 10 core holder 105 coupling tool 105A outer casing of coupling tool 106 cushion member 107 shaft cylinder 110 core holder

Claims

軸筒の前部に先部材を設け、この先部材内に芯をガイドするための芯ガイドを長手方向に摺動可能に内蔵し、芯ガイドに固定された芯ホルダーを先部材の内面に摩擦接触させるとともに芯ホルダーにより芯を保持したノック式シャープペンシルにおいて、チャックの頭部に締具を外嵌し、この締具を受ける連結具にクッション部材を設けて緩衝装置を構成し、かつ前記芯ホルダーの芯保持力を芯ホルダーと先部材の摩擦力より大きく構成したことを特徴とするノック式シャープペンシル。 A tip member is provided at the front part of the shaft tube, and a lead guide for guiding the lead in the tip member is slidably incorporated in the longitudinal direction, and a lead holder fixed to the lead guide is brought into frictional contact with the inner surface of the tip member. In the knock type mechanical pencil having the lead held by the lead holder, a fastener is externally fitted to the head of the chuck, and a cushioning device is provided on the connecting tool that receives the fastener to constitute a shock absorber, and the lead holder A knock-type mechanical pencil, characterized in that its core holding force is greater than the friction force between the core holder and the tip member.

連結具にクッション部材を２色成形により構成して緩衝装置を構成し、かつ、クッション部材と軸筒のどちらか一方に突部を形成するとともに、この突部を他方に押圧させて構成したことを特徴とする請求項１記載のノック式シャープペンシル。 A cushioning device is constructed by forming a cushion member on the connector by two-color molding, and a projection is formed on one of the cushion member and the shaft tube, and the projection is pressed against the other. The knock type mechanical pencil according to claim 1.

連結具の前部に外鍔を形成するとともに外鍔後方に突部を形成し、更に連結具の後筒部に長手方向に伸びた***部を相対位置に形成し、この連結具にクッション部材を２色成形により構成し、前記クッション部材に長手方向後方に突出した突部を相対位置に形成して緩衝装置を構成し、クッション部材の突部を軸筒に押圧して構成したことを特徴とする請求項１又は２記載のノック式シャープペンシル。 An outer casing is formed at the front part of the coupling tool, a protrusion is formed at the rear of the outer casing, and a ridge extending in the longitudinal direction is formed at the relative position on the rear cylinder part of the coupling tool. Is formed by two-color molding, and a cushioning device is formed by forming a protrusion protruding rearward in the longitudinal direction on the cushion member, and the protrusion of the cushion member is pressed against the shaft tube. The knock type mechanical pencil according to claim 1 or 2.