JP2017030196A

JP2017030196A - Lead delivery implement

Info

Publication number: JP2017030196A
Application number: JP2015150875A
Authority: JP
Inventors: 真樹大津; Maki Otsu; 亮太高橋; Ryota Takahashi; 康孝上原; Yasutaka Uehara
Original assignee: Pilot Corp
Current assignee: Pilot Corp
Priority date: 2015-07-30
Filing date: 2015-07-30
Publication date: 2017-02-09

Abstract

PROBLEM TO BE SOLVED: To provide a lead delivery implement 1 capable of preventing a lead 7 from breaking by reducing a load thereto.SOLUTION: In a lead delivery implement, an inner periphery surface 18d of an annular member 18 approaches to an outer peripheral surface 30c of a barrel body 3 to slide inclined surfaces 18b, 18c of the annular member 18 on contact parts 31a, 42c, 19b, 19c disposed adjacent to the annular member 18 so as to move the contact parts in a direction along the shaft center, and at the same time, a front opening body 4 is advanced with respect to a lead delivery mechanism 6, resisting a resilient force of a resilient body 17 so that a front end part 7a of a lead 7 held by the lead delivery mechanism 6 is inserted into the front opening body 4.SELECTED DRAWING: Figure 3

Description

本発明は、軸筒の内部に収容した棒状の芯を該軸筒より繰り出して先端開口部から突出させた状態で使用する芯繰出具に関したものである。 The present invention relates to a core feeding tool that is used in a state in which a rod-shaped core housed in a shaft tube is fed from the shaft tube and protruded from a tip opening.

軸筒の内部に、シャープペンシルや色鉛筆やクレヨン、あるいは固形糊や口紅やリップクリームなど棒状の芯を収容し、芯の前端部を軸筒より繰り出して先端開口部から突出させた状態にして紙面などへ筆記や塗布を行う芯繰出具はよく知られている。 Inside the shaft cylinder, a mechanical pencil, colored pencil, crayon, or a rod-shaped core such as solid glue, lipstick, or lip balm is housed, and the front end of the core is extended from the shaft cylinder so that it protrudes from the tip opening. Well-known tools for writing or applying to a core are well known.

前記棒状の芯は、それ自体単体では外部との接触で折れやすいが、軸筒の内部に収容した状態では外部との接触がなく、芯折れを防止することができる。
しかしながら筆記や塗布を行う際には、前述の通り芯の前端部を軸筒の先端開口部から突出させる必要があり、軸筒の先端開口部から突出させる芯の前端部が長ければ長いほど、あるいは筆圧が高ければ高いほど、軸筒の先端開口部より突出した芯の前端部に負担が掛かり芯が折れやすくなることから、使用状態において芯の前端部を軸筒の先端開口部から突出させた状態でも、芯を折れ難くすることが可能な構造が求められている。 The rod-shaped core itself is easily broken by contact with the outside as a single body. However, when the rod-shaped core is housed inside the shaft tube, there is no contact with the outside, and the core breakage can be prevented.
However, when writing and applying, it is necessary to project the front end of the core from the tip opening of the shaft cylinder as described above, the longer the front end of the core that projects from the tip opening of the shaft cylinder, Alternatively, the higher the writing pressure, the more burden is applied to the front end of the core protruding from the tip opening of the shaft cylinder, and the core is more likely to break, so the front end of the core protrudes from the tip opening of the shaft cylinder in use. There is a demand for a structure that can make the core difficult to break even in such a state.

尚、前述の使用時において芯の前端部が折れてしまうという現象は、芯径が細く筆記の対象が硬い机上に置かれた紙であることが多く、また手帳への筆記など手で持って不安定な状態で使用されることが多いシャープペンシルで特に発生しやすく、その解決策を考えたシャープペンシルが、例えば特許文献１や特許文献２に記載されている。 In addition, the phenomenon that the front end of the lead breaks during the above-mentioned use is often paper that is placed on a hard desk with a thin core diameter, and can be held by hand such as writing on a notebook. Mechanical pencils that are particularly likely to occur with mechanical pencils that are often used in an unstable state, and for which a solution is considered, are described in, for example, Patent Document 1 and Patent Document 2.

前記特許文献１では、チャックに挟持された芯に、軸筒の軸心に沿った後方への過大な筆圧が掛かった際、その押圧力を軸筒内に配設した緩衝スプリングにて緩衝して芯折れを防止する構造のシャープペンシルが記載されている。
この構造では、シャープペンシルの軸筒を立てて筆記する場合の筆圧に対しては、軸心に沿った方向に伸び縮みする緩衝スプリングが有効に機能するが、軸筒を傾けて筆記する場合の筆圧に対しては、緩衝スプリングが有効に機能せず、芯折れを防止しきれないことがある。 In Patent Document 1, when excessive writing pressure is applied rearward along the axis of the shaft cylinder to the core sandwiched by the chuck, the pressing force is buffered by a buffer spring disposed in the shaft cylinder. Thus, a mechanical pencil having a structure for preventing breakage of the core is described.
In this structure, a shock absorbing spring that expands and contracts in the direction along the shaft center works effectively against the writing pressure when writing with a mechanical pencil shaft standing upright, but when writing while tilting the shaft cylinder With respect to the writing pressure, the buffer spring may not function effectively and the core breakage may not be prevented.

前記特許文献２では、チャックに挟持された芯に、軸筒の軸心に対する斜めの筆圧が掛かった際、芯を介して口金体に作用する力によって、口金体全体を軸本体の軸心に対して傾動させ、芯折れを軽減する構造のシャープペンシルが記載されている。
この構造では、軸筒の軸心に対する斜めの筆圧が掛かった際に、口金体が傾動できる範囲内では芯折れが防止される効果があるが、口金体が傾動しきった状態で更に強い筆圧が掛かってしまった場合には、芯が折れてしまうこととなる。 In Patent Document 2, when an oblique writing pressure with respect to the axis of the shaft cylinder is applied to the core sandwiched by the chuck, the entire base is made to be the axis of the shaft main body by a force acting on the base through the core. A mechanical pencil having a structure that tilts relative to the core and reduces core breakage is described.
This structure has the effect of preventing core breakage within the range in which the base can be tilted when an oblique writing pressure is applied to the axial center of the shaft tube, but a stronger brush can be used with the base body fully tilted. If pressure is applied, the core will break.

前記特許文献１及び前記特許文献２のいずれもが、芯に筆圧が掛かることで当該芯を介して芯折れを防止する機能が働く構成のため、芯への負荷を避けることはできず、特に芯の前端部が先端開口から長く突出された状態では、芯が折れやすくなってしまった。 Since both Patent Document 1 and Patent Document 2 are configured to function to prevent core breakage via the core by applying writing pressure to the core, the load on the core cannot be avoided, In particular, when the front end portion of the lead protrudes long from the tip opening, the lead is easily broken.

実開昭５６−１３０８７４号公報Japanese Utility Model Publication No. 56-130874 特開２０１０−２６４６３８号公報JP 2010-264638 A

本発明は、前記問題を鑑みてなされたものであって、芯への負荷を軽減して芯折れを防止することができる芯繰出具を得ることを目的とする。 This invention is made | formed in view of the said problem, Comprising: It aims at obtaining the lead feeding tool which can reduce the load to a core and can prevent a core breakage.

本発明は、
「１．軸筒が軸筒本体と該軸筒本体の前方に配した先口体と該先口体の後方に設けた把持部とを有し、前記先口体に、前記軸筒本体の内部に配した芯繰出機構で繰り出された芯が突出する先端開口部を設け、前記把持部に、前後に延びるスリットを有した環状部材を、前記軸筒本体の外周面から離間させて配し、前記環状部材の端部に該環状部材の外方から内方へ向かって内向きに傾斜する傾斜面を形成し、前記環状部材に隣設する当接部へ前記傾斜面を当接させ、前記芯繰出機構に設けた前方係止部と前記先口体に設けた後方係止部との間に弾発体を配し、前記環状部材のスリットの巾を狭めることにより、該環状部材の内周面を前記軸筒本体の外周面に接近させ、該環状部材の傾斜面を当該環状部材と隣設する前記当接部に摺接させて該当接部を軸心に沿った方向へ移動させながら、前記先口体を前記弾発体の弾発力に抗して前記芯繰出機構に対して前進させ、前記芯繰出機構に挟持された前記芯の前端部を前記先口体に没入させる構造の芯繰出具。
２．前記把持部に複数の環状部材を配し、前記複数の環状部材の間に前記軸筒本体の外周面と摺接して前後動する摺動部材を配し、前記摺動部材に前記環状部材の傾斜面と当接する当接部を設け、前記環状部材の内周面を前記軸筒本体の外周面に接近させることにより、前記環状部材の傾斜面を該環状部材と隣設した前記摺動部材に摺接させて軸心に沿った方向へ移動させる前記１項に記載の芯繰出具。
３．軸筒が軸筒本体と該軸筒本体の前方に配した先口体と該先口体の後方に設けた把持部とを有し、前記先口体に、前記軸筒本体の内部に配した芯繰出機構で繰り出された芯が突出する先端開口部を設け、前記把持部に、前後に延びるスリットを有した環状部材を、前記軸筒本体の外周面から離間させて配し、前記環状部材と隣設する当接部に内方から外方へ向かって該環状部材から離れる方向に傾斜する外向きの傾斜面を形成し、前記当接部に隣設する前記環状部材へ前記傾斜面を当接させ、前記芯繰出機構に設けた前方係止部と前記先口体に設けた後方係止部との間に弾発体を配し、前記環状部材のスリットの巾を狭めることにより、該環状部材の内周面を前記軸筒本体の外周面に接近させ、前記当接部の傾斜面を該当接部と隣設する前記環状部材に摺接させて該環状部材を軸心に沿った方向へ移動させながら、前記先口体を前記弾発体の弾発力に抗して芯繰出機構に対して前進させ、前記芯繰出機構に挟持された前記芯の前端部を前記先口体に没入させる構造の芯繰出具。
４．前記把持部に複数の環状部材を配し、前記複数の環状部材の間に前記軸筒本体の外周面と摺接して前後動する摺動部材を配し、前記環状部材と隣設する摺動部材に内方から外方へ向かって該環状部材から離れる方向に傾斜する外向きの傾斜面を形成して当接部とし、前記環状部材の内周面を前記軸筒本体の外周面に接近させることにより、前記摺動部材の傾斜面を該摺動部材と隣設した前記環状部材に摺接させて軸心に沿った方向へ移動させる前記３項に記載の芯繰出具。」である。 The present invention
“1. The shaft cylinder has a shaft cylinder main body, a front end body disposed in front of the shaft main body, and a grip portion provided at the rear of the front end body. A tip opening is provided in which a lead fed out by a lead feeding mechanism arranged inside protrudes, and an annular member having a slit extending in the front-rear direction is provided in the gripping part so as to be separated from the outer peripheral surface of the shaft tube main body. Forming an inclined surface inclined inward from the outside of the annular member toward the inside of the end of the annular member, and contacting the inclined surface to an abutting portion adjacent to the annular member; An elastic member is arranged between a front locking portion provided in the core feeding mechanism and a rear locking portion provided in the front opening body, and by narrowing the width of the slit of the annular member, The inner peripheral surface is brought close to the outer peripheral surface of the shaft cylinder body, and the inclined surface of the annular member is slidably contacted with the contact portion adjacent to the annular member. While moving the contact portion in the direction along the axis, the tip body is advanced with respect to the lead feeding mechanism against the resilient force of the bullet, and is held by the lead feeding mechanism. A lead feeding tool having a structure in which a front end portion of a lead is inserted into the tip body.
2. A plurality of annular members are disposed on the gripping portion, a sliding member that slides back and forth in contact with the outer peripheral surface of the shaft cylinder body is disposed between the plurality of annular members, and the annular member is disposed on the sliding member. The sliding member having an abutting portion that abuts against the inclined surface, and having the inner peripheral surface of the annular member approached the outer peripheral surface of the shaft tube main body, whereby the inclined surface of the annular member is provided adjacent to the annular member. 2. The lead feeding tool according to 1 above, wherein the lead feeding tool is moved in a direction along the axial center by being brought into sliding contact therewith.
3. The shaft tube has a shaft tube main body, a front end body disposed in front of the shaft tube main body, and a grip portion provided at the rear of the front end body, and the shaft tube is disposed inside the shaft tube main body. A tip opening portion through which the lead fed out by the lead feeding mechanism is provided, and an annular member having a slit extending in the front-rear direction is provided in the gripping portion so as to be spaced apart from the outer peripheral surface of the shaft cylinder body, An outwardly inclined surface that inclines in a direction away from the annular member from the inside toward the outside is formed in the contact portion adjacent to the member, and the inclined surface is provided to the annular member adjacent to the contact portion. By placing an elastic body between the front locking portion provided in the lead feeding mechanism and the rear locking portion provided in the leading end body, and narrowing the width of the slit of the annular member The annular member is configured such that the inner peripheral surface of the annular member approaches the outer peripheral surface of the shaft cylinder body, and the inclined surface of the contact portion is adjacent to the corresponding contact portion. While moving the annular member in a direction along the axial center while being in sliding contact with the member, the leading end body is advanced against the core feeding mechanism against the resilient force of the projecting body, and the core feeding is performed. A lead feeding tool having a structure in which a front end portion of the lead pinched by a mechanism is immersed in the front end body.
4). A plurality of annular members are arranged in the gripping portion, and a sliding member that slides back and forth in contact with the outer peripheral surface of the shaft cylinder body is arranged between the plurality of annular members, and the sliding adjacent to the annular member. An outwardly inclined surface that inclines in a direction away from the annular member from the inside toward the outside is formed on the member as an abutment portion, and the inner peripheral surface of the annular member approaches the outer peripheral surface of the shaft cylinder body 4. The lead feeding tool according to item 3, wherein the inclined surface of the sliding member is brought into sliding contact with the annular member adjacent to the sliding member and moved in a direction along the axis. It is.

本発明における芯繰出機構は、使用する芯により適宜設定することができる。シャープペンシルや色鉛筆においては、軸筒内で芯を挟持したチャックを前方へ押動することによって、チャックと共に芯を前進させて、芯を繰り出す公知構造の芯繰出機構を用いることができる。クレヨンや固形糊や口紅やリップクリームにおいては、軸筒の後方に回転可能に嵌合させた回転部材を回転することによって、軸筒の内部に配設された受皿を前進させて、受皿に押圧された芯を繰り出す公知構造の芯繰出機構を用いることができる。 The lead feeding mechanism in the present invention can be appropriately set depending on the lead used. For mechanical pencils and colored pencils, a known structure for feeding a lead can be used by pushing the chuck holding the lead in the shaft cylinder forward to advance the lead together with the chuck. In crayons, solid paste, lipsticks, and lip balms, a rotating member fitted rotatably to the rear of the shaft tube is rotated to advance the tray placed inside the shaft tube and press it against the tray It is possible to use a core feeding mechanism having a known structure that feeds the core that has been formed.

本発明の芯繰出具は、環状部材の内周面が軸筒本体の外周面に接近することで、先口体が前進して先端開口部から突出した芯の前端部を保護する構造であり、その動作は軸筒の把持部への把持力により行われることとなる。これは使用時において、筆圧が高くなるほど使用者が軸筒の把持部を強く握る傾向があることに着眼して案出されたものである。
また、本発明の芯繰出具は、使用する芯の強度により、先口体と芯繰出機構との間に配設する弾発体の強度を適宜設定することができ、折れやすい芯の場合には弾発力が弱い弾発体を使用して先口体を前進させやすくし、折れ難い芯の場合には弾発力が強い弾発体を使用して先口が前進し難いようにすればよい。
このように本発明の芯繰出具では、芯に筆圧が掛かることなく、軸筒の把持部への把持力で先口体を前進させて芯の前端部を保護することができることから、芯への負荷を軽減することが可能となる。 The core feeding tool of the present invention is a structure that protects the front end portion of the core that the tip end body advances and projects from the tip opening by the inner peripheral surface of the annular member approaching the outer peripheral surface of the shaft cylinder body. The operation is performed by the gripping force on the gripping portion of the shaft tube. This is devised in view of the fact that the user tends to grip the grip portion of the shaft tube more strongly as the writing pressure becomes higher in use.
Further, the lead feeding tool of the present invention can appropriately set the strength of the projecting body disposed between the leading end body and the lead feeding mechanism depending on the strength of the lead used, and in the case of a pliable lead. Use a weakly resilient projectile to make it easier to move forward, and in the case of a hard-to-break core, use a highly resilient projectile to make it harder to advance. That's fine.
As described above, in the lead feeding tool of the present invention, the front end of the lead can be protected by advancing the tip body with the gripping force to the gripping portion of the shaft tube without applying pressure to the lead. It becomes possible to reduce the load on.

尚、環状部材に設けるスリットは、軸筒の軸心に沿って真っ直ぐに前後を連通する形態や、軸筒の軸心に沿った方向に対して傾斜しながら前後を連通する形態とすることができる。スリットを軸筒の軸心に沿った方向に対して傾斜させた場合には、使用者が軸筒の把持部を強く握った際に、環状部材の内周面が軸筒本体の外周面に接近すると共に、環状部材におけるスリットを形成した端面同士が摺接して前後方向のずれを発生させ、結果的に環状部材の前後端部が軸心に沿った方向に伸びて、先口体を前進させる量を多くすることが可能となる。 In addition, the slit provided in the annular member may be configured such that the front and rear are communicated straight along the axis of the shaft cylinder, and the front and rear are communicated while being inclined with respect to the direction along the axis of the shaft cylinder. it can. When the slit is inclined with respect to the direction along the axis of the shaft tube, the inner peripheral surface of the annular member is brought into contact with the outer peripheral surface of the shaft tube main body when the user grips the grip portion of the shaft tube. At the same time, the end surfaces of the annular member formed with slits are in sliding contact with each other to generate a front-rear direction shift. As a result, the front and rear end portions of the annular member extend in the direction along the axis, and the front end is advanced. The amount to be increased can be increased.

環状部材に隣設する当接部は、先口体や軸筒本体に設けることができる。また、環状部材の端部に傾斜面を設けると共に該環状部材に隣設する当接部にも傾斜面を設けることで、傾斜面同士が摺接する構造となり、滑らかな動作が得られやすくなる。 The abutting portion provided adjacent to the annular member can be provided on the tip opening body or the shaft tube main body. Further, by providing an inclined surface at the end of the annular member and also providing an inclined surface at the abutting portion adjacent to the annular member, the inclined surfaces are in sliding contact with each other, and a smooth operation is easily obtained.

また、環状部材や摺動部材を複数設けることで、複数の環状部材及び摺動部材が軸心方向へ移動する量が累積され、先口体を前進させる量を多くすることが可能となる。 Further, by providing a plurality of annular members and sliding members, the amount of movement of the plurality of annular members and sliding members in the axial direction is accumulated, and the amount by which the front end body is advanced can be increased.

本発明の芯繰出具によれば、芯への負荷を軽減して芯折れを防止することができる芯繰出具を得ることができた。 According to the lead feeding tool of the present invention, a lead feeding tool capable of reducing the load on the lead and preventing the lead from breaking can be obtained.

本実施例のシャープペンシルの側面図である。It is a side view of the mechanical pencil of a present Example. 図１の要部断面図である。It is principal part sectional drawing of FIG. 図２の一部拡大断面図である。It is a partially expanded sectional view of FIG. 要部の部品構成を示す斜視図である。It is a perspective view which shows the components structure of the principal part. 本実施例のシャープペンシルの使用状態を示す要部断面図である。It is principal part sectional drawing which shows the use condition of the mechanical pencil of a present Example. 図５の一部拡大断面図である。It is a partially expanded sectional view of FIG.

以下、図面を参照して本実施例のシャープペンシルについて説明をするが、本発明はシャープペンシルに限定されるものではなく、色鉛筆やクレヨンあるいは固形糊や口紅やリップクリームなど棒状の芯を用いた芯繰出具に用いることができる。
本実施例では、筆記先端部がある側を前方と表現し、その反対側を後方と表現する。また、軸筒の軸心に近い側を内方と表現し、その反対側を外方と表現する。
尚、説明を分かりやすくするために、図面中の同様の部材、同様の部分については同じ符号を付しており、請求項に該当する部材や部分などの名称が、請求項の語句と異なる場合には、括弧内に請求項記載の語句を記載してある。 Hereinafter, the mechanical pencil of the present embodiment will be described with reference to the drawings, but the present invention is not limited to the mechanical pencil, and a colored pencil, crayon, solid paste, lipstick, lip balm, or the like is used. It can be used for a lead feeding tool.
In this embodiment, the side with the writing tip is expressed as the front, and the opposite side is expressed as the rear. Moreover, the side close to the axial center of the shaft cylinder is expressed as inward, and the opposite side is expressed as outward.
In addition, in order to make the explanation easy to understand, the same reference numerals are given to the same members and the same parts in the drawings, and names of members and parts corresponding to the claims are different from the words of the claims. Includes the words in the claims in parentheses.

以下、図１〜図３に基づいて、本実施例のシャープペンシルを説明する。シャープペンシル１は、軸筒２が、軸筒本体３と該軸筒本体３の前方に配した先口体４と該先口体４の後方に設けた把持部５とを有し、先口体４に、軸筒本体３の内部に配した芯繰出機構６で繰り出された芯７の前端部７ａが突出する先端開口部４ａを設けてある。
芯繰出機構６は、軸筒２の後端から突出させたノック体８を押動することにより、ノック体８に連結した芯タンク９を介して作動する。芯タンク９は、芯タンク９の開口部９ａに後方部１０ａを挿着した筒状の連結体１０を介して芯７を挟持するチャック１１と連結してあり、チャック１１を、ノック体８及び芯タンク９の前後動に従動するようにしてある。 Hereinafter, the mechanical pencil of the present embodiment will be described with reference to FIGS. The mechanical pencil 1 includes a shaft tube 2 having a shaft tube body 3, a front end body 4 disposed in front of the shaft body 3, and a grip portion 5 provided at the rear of the front end body 4. The body 4 is provided with a front end opening 4a from which a front end 7a of a core 7 fed out by a core feeding mechanism 6 arranged inside the shaft cylinder main body 3 protrudes.
The lead feeding mechanism 6 operates via a lead tank 9 connected to the knock body 8 by pushing the knock body 8 protruded from the rear end of the shaft cylinder 2. The lead tank 9 is connected to a chuck 11 that sandwiches the lead 7 via a cylindrical connecting body 10 in which a rear portion 10a is inserted into an opening 9a of the lead tank 9, and the chuck 11 is connected to the knock body 8 and The lead tank 9 is driven to move back and forth.

前記連結体１０は、前方部１０ｂを、前端に外鍔１２ａと内鍔１２ｂとを形成した中空の円筒部材１２の開口部１２ｃに挿通させており、円筒部材１２は、外側面に形成した突起部１２ｄと外鍔１２ａとの間に、軸筒本体３の前方部３０の前方内面に形成した内段３０ａを係合させて固定してある。
また、円筒部材１２の内鍔１２ｂと連結体１０の前端との間にはチャックスプリング１３を配設してあり、円筒部材１２の内鍔１２ｂに当接したチャックスプリング１３により連結体１０を後方に弾発し、後端部１１ａが連結体１０の開口部１０ｃに嵌着されたチャック１１の頭部１１ｂを、円筒部材１２の内鍔１２ｂに当接した締リング１４で締めて、芯７が筆圧で後退しないよう挟持してある。 The connecting body 10 has a front portion 10b inserted through an opening 12c of a hollow cylindrical member 12 having an outer flange 12a and an inner flange 12b formed at the front end, and the cylindrical member 12 is a protrusion formed on the outer surface. An inner step 30a formed on the front inner surface of the front portion 30 of the shaft tube main body 3 is engaged and fixed between the portion 12d and the outer casing 12a.
Further, a chuck spring 13 is disposed between the inner flange 12b of the cylindrical member 12 and the front end of the coupling body 10, and the coupling body 10 is moved rearward by the chuck spring 13 in contact with the inner flange 12b of the cylindrical member 12. The head 11b of the chuck 11 whose rear end portion 11a is fitted in the opening 10c of the coupling body 10 is tightened with the tightening ring 14 in contact with the inner flange 12b of the cylindrical member 12, and the core 7 is It is pinched so as not to retreat by writing pressure.

また、軸筒本体３の前方部３０の前端外面には雄螺子部３０ｂを形成してあり、先口体４の内部に配した内先口１５の後端内面に形成した雌螺子部１５ａに螺合してある。内先口１５は、前端に芯７を挿通させる前端開口部１５ｂを形成してあり、前端開口部１５ｂの後方に芯７を保持する芯ホルダー１５ｃを嵌着してある。
また、本実施例の先口体４は、先口本体４１と後部筒状体４２とで構成し、先口本体４１の後端内面に形成した雌螺子部４１ａに、後部筒状体４２の外面に形成した雄螺子部４２ａを螺合させて一体としてある。また、前記内先口１５の中央外面には雄螺子部１５ｄを形成し、外方にフランジ（後方係止部）１６ａを有したリング状のフランジ体１６の内面に形成した雌螺子部１６ｂと螺合してあり、先口体４の後部筒状体４２の前端部（後方係止部）４２ｂとフランジ体１６のフランジ（前方係止部）１６ａとの間にコイルスプリング（弾発体）１７を配設することにより、フランジ体１６を固着した芯繰出機構６に対して先口体４が常時後方へ弾発される構造としてある。 Further, a male screw portion 30 b is formed on the outer surface of the front end of the front portion 30 of the shaft cylinder body 3, and a female screw portion 15 a formed on the inner surface of the rear end of the inner front port 15 disposed inside the front port body 4. It is screwed. The inner tip 15 has a front end opening 15b through which the core 7 is inserted at the front end, and a core holder 15c for holding the core 7 is fitted behind the front end opening 15b.
Further, the front end body 4 of the present embodiment is composed of a front end main body 41 and a rear cylindrical body 42, and a female screw portion 41 a formed on the inner surface of the rear end of the front end main body 41 is provided with the rear cylindrical body 42. A male screw portion 42a formed on the outer surface is screwed together to be integrated. Further, a male screw portion 15d is formed on the outer surface of the center of the inner tip 15, and a female screw portion 16b formed on the inner surface of a ring-shaped flange body 16 having a flange (rear locking portion) 16a on the outer side. A coil spring (elastic body) is screwed between the front end portion (rear locking portion) 42b of the rear tubular body 42 of the front opening 4 and the flange (front locking portion) 16a of the flange body 16. By arranging 17, the leading end body 4 is always repelled rearward with respect to the core feeding mechanism 6 to which the flange body 16 is fixed.

筆記により消耗した芯７を先口体４の先端開口部４ａから突出させる際には、ノック体８の押動により前進した芯タンク９で連結体１０及びチャック１１を前進させ、チャック１１の頭部１１ｂに外嵌した締リング１４が内先口１５の内面に形成した後方段部１５ｅに当接してチャック１１が開くまで、チャック１１により芯７を前進させて、先口体４の先端開口部４ａから芯７の前端部７ａを突出させることができる。
尚、チャック１１の前進は、チャック１１の先端が内先口１５の内面に形成した前方段部１５ｆに当接することで規制され、芯７を繰り出した後にノック体８の押動を止めると、チャックスプリング１３の弾発力で連結体１０及びチャック１１が後退することになるが、芯７は、再び締リング１４がチャック１１の頭部１１ｂを締めるまで芯ホルダー１５ｃで保持されるので、芯７の前端部７ａが先端開口部４ａから突出した状態で維持することができる。 When the core 7 consumed by writing is projected from the tip opening 4 a of the front end body 4, the connecting body 10 and the chuck 11 are advanced by the core tank 9 advanced by the pushing motion of the knock body 8, and the head of the chuck 11 is moved forward. The core 7 is advanced by the chuck 11 until the clamping ring 14 that is externally fitted to the portion 11b contacts the rear step portion 15e formed on the inner surface of the inner tip 15 and the chuck 11 is opened. The front end portion 7a of the core 7 can be protruded from the portion 4a.
The forward movement of the chuck 11 is restricted by the front end of the chuck 11 coming into contact with the front step portion 15f formed on the inner surface of the inner tip 15, and when the push of the knock body 8 is stopped after the lead 7 is drawn out, The coupling body 10 and the chuck 11 are retracted by the elastic force of the chuck spring 13, but the core 7 is held by the core holder 15c until the fastening ring 14 tightens the head 11b of the chuck 11 again. 7 can be maintained in a state in which the front end portion 7a protrudes from the tip opening portion 4a.

本実施例の軸筒本体３の前方部３０は、軸筒本体３の中間部３１より小径に形成してあり、四個の円環部材１８を、該軸筒本体３の前方部３０の外周面３０ｃを被覆するよう配し、前記四個の円環部材１８の間に、軸筒本体３の外周面３０ｃと摺接して前後動する三個の摺動部材１９を配してある。円環部材１８は、外方に長手部１８ａを有した断面等脚台形形状に形成してあり、摺動部材１９は、外方に頂部１９ａを有した断面正三角形形状に形成してある。本実施例では、摺動部材１９の断面を正三角形形状に形成したことから、前方側面（当接部）１９ｂ及び後方側面（当接部）１９ｃは軸心に対して６０度傾斜しており、前方側面（当接部）１９ｂ及び後方側面（当接部）１９ｃに当接する円環部材１８の前方脚部（傾斜面）１８ｂ及び後方脚部（傾斜面）１８ｃも同角度で傾斜させてある。また、円環部材１８に隣設する先口体４の後部筒状体４２の後端部（当接部）４２ｃも、軸心に対して６０度傾斜させており、同じく円環部材１８に隣設する軸筒本体３の中間部３１の前端部（当接部）３１ａも、軸心に対して６０度傾斜させている。 The front portion 30 of the shaft tube main body 3 of the present embodiment is formed to have a smaller diameter than the intermediate portion 31 of the shaft tube main body 3, and the four annular members 18 are arranged on the outer periphery of the front portion 30 of the shaft tube main body 3. Three sliding members 19 are arranged so as to cover the surface 30c, and move back and forth in sliding contact with the outer peripheral surface 30c of the shaft cylinder body 3 between the four annular members 18. The annular member 18 is formed in an isosceles trapezoidal shape with a cross section having a longitudinal portion 18a on the outer side, and the sliding member 19 is formed in an equilateral triangular shape with a top portion 19a on the outer side. In this embodiment, since the cross section of the sliding member 19 is formed in a regular triangle shape, the front side surface (contact portion) 19b and the rear side surface (contact portion) 19c are inclined by 60 degrees with respect to the axis. The front leg portion (inclined surface) 18b and the rear leg portion (inclined surface) 18c of the annular member 18 that abuts on the front side surface (contact portion) 19b and the rear side surface (contact portion) 19c are also inclined at the same angle. is there. In addition, the rear end portion (contact portion) 42c of the rear tubular body 42 adjacent to the annular member 18 is also inclined by 60 degrees with respect to the axial center. The front end portion (contact portion) 31a of the intermediate portion 31 of the adjacent shaft cylinder main body 3 is also inclined by 60 degrees with respect to the axis.

円環部材１８の内周面１８ｄは、軸筒本体３の前方部３０の外径より大きく形成しており、軸筒本体３の外周面３０ｃと円環部材１８の内周面１８ｄとの間に隙間Ｓを設けて、軸筒本体３の外周面３０ｃから円環部材１８の内周面１８ｄを離間させて配設してある。
摺動部材１９の内周面１９ｄは、軸筒本体３の前方部３０の外径より若干大きく形成しており、軸筒本体３の外周面３０ｃと摺動部材１９の内周面１９ｄとが常時接するよう配設してある。
また、本実施例の円環部材１８は、前後に延びるスリット１８ｅ（図１、図２参照）を設けてあり、長手部１８ａを指で摘まむことにより、端面１８ｆ同士を近付けながらスリット１８ｅの巾を狭めて、円環部材１８を縮径させることができる。
軸筒本体３の前方部３０に配設した各円環部材１８及び摺動部材１９は、芯繰出機構６に対して先口体４を後方に弾発するコイルスプリング（弾発体）１７によって、先口体４の後端部（当接部）４２ｃと軸筒本体３の前端部（当接部）３１ａとで互いに圧接される。 An inner peripheral surface 18 d of the annular member 18 is formed to be larger than an outer diameter of the front portion 30 of the shaft cylinder body 3, and between the outer peripheral surface 30 c of the shaft cylinder body 3 and the inner peripheral surface 18 d of the annular member 18. A gap S is provided in the inner cylinder 18 so that the inner circumferential surface 18 d of the annular member 18 is separated from the outer circumferential surface 30 c of the shaft cylinder body 3.
The inner peripheral surface 19d of the sliding member 19 is formed to be slightly larger than the outer diameter of the front portion 30 of the shaft tube main body 3, and the outer peripheral surface 30c of the shaft tube main body 3 and the inner peripheral surface 19d of the sliding member 19 are formed. It is arranged so that it is always in contact.
Further, the annular member 18 of the present embodiment is provided with slits 18e (see FIGS. 1 and 2) extending in the front-rear direction, and by grasping the longitudinal portion 18a with a finger, the end surfaces 18f are brought close to each other while the slits 18e are close to each other. The annular member 18 can be reduced in diameter by narrowing the width.
Each annular member 18 and sliding member 19 disposed in the front portion 30 of the shaft cylinder main body 3 are provided by a coil spring (bouncer) 17 that repels the front opening 4 backward with respect to the core feeding mechanism 6. The rear end portion (contact portion) 42c of the front end body 4 and the front end portion (contact portion) 31a of the shaft tube main body 3 are pressed against each other.

次に、図５及び図６に基づいて本実施例のシャープペンシルの使用状態について説明する。シャープペンシル１は、使用時において筆圧が高くなった際に、使用者が軸筒２の把持部５を強く握ることで、円環部材１８のスリット１８ｅの巾が狭まり、コイルスプリング（弾発体）１７を圧縮しながら、円環部材１８の内周面１８ｄが軸筒本体３の前方部３０の外周面３０ｃに当接する構造である。
この時、円環部材１８の前方脚部（傾斜面）１８ｂ及び後方脚部（傾斜面）１８ｃは、隣設して当接する摺動部材１９の前方側面（当接部）１９ｂ及び後方側面（当接部）１９ｃ、先口体４の後部筒状体４２の後端部（当接部）４２ｃ、軸筒本体３の中間部３１の前端部（当接部）３１ａを、軸筒本体３の軸経方向である下方へ押圧すると共に、軸心に沿った方向へ押動する。
本実施例では、軸筒本体３の前方部３０の外周面３０ｃに四個配設した円環部材１８の内、最後部に配置した円環部材１８の後方脚部（傾斜面）１８ｃが、前後動しない軸筒本体３の中間部３１の前端部（当接部）３１ａに当接するので、軸心に沿った方向へ移動可能な円環部材１８、摺動部材１９、先口体４は前方へ移動することとなり、図５及び図６に示すように、芯７の前端部７ａが前進した先口体４の先端開口部４ａに没入して芯折れを防止することができた。 Next, the usage state of the mechanical pencil of the present embodiment will be described with reference to FIGS. The mechanical pencil 1 is configured such that when the writing pressure increases during use, the user strongly grips the grip portion 5 of the shaft tube 2, so that the width of the slit 18 e of the annular member 18 is reduced, and a coil spring (elastic The inner peripheral surface 18 d of the annular member 18 is in contact with the outer peripheral surface 30 c of the front portion 30 of the shaft body 3 while compressing the body 17.
At this time, the front leg portion (inclined surface) 18b and the rear leg portion (inclined surface) 18c of the annular member 18 are adjacent to the front side surface (contact portion) 19b and the rear side surface of the sliding member 19 in contact with each other. The abutting portion 19 c, the rear end portion (abutting portion) 42 c of the rear tubular body 42 of the front end body 4, and the front end portion (abutting portion) 31 a of the intermediate portion 31 of the shaft tube main body 3 are connected to the shaft tube body 3. Is pushed downward in the axial direction of the axis, and is pushed in a direction along the axis.
In the present embodiment, among the four annular members 18 arranged on the outer peripheral surface 30c of the front portion 30 of the shaft cylinder main body 3, the rear leg portion (inclined surface) 18c of the annular member 18 arranged at the rearmost portion, The ring member 18, the sliding member 19, and the front end body 4 that are movable in the direction along the axial center are in contact with the front end portion (contact portion) 31 a of the intermediate portion 31 of the shaft cylinder body 3 that does not move back and forth. As shown in FIGS. 5 and 6, the front end portion 7 a of the core 7 was immersed in the front end opening 4 a of the front end body 4 and the core breakage could be prevented.

また、筆圧が低くなり、軸筒２の把持部５の握りが弱くなると、コイルスプリング（弾発体）１７の弾発力で、先口体４、円環部材１８、摺動部材１９が後方へ移動して、芯７の前端部７ａが先口体４の先端開口部４ａから再び突出した。 Further, when the writing pressure is lowered and the grip of the grip portion 5 of the shaft tube 2 is weakened, the tip body 4, the annular member 18, and the sliding member 19 are moved by the elastic force of the coil spring (elastic body) 17. After moving backward, the front end portion 7 a of the core 7 protrudes again from the tip opening portion 4 a of the tip body 4.

１…シャープペンシル、
２…軸筒、
３…軸筒本体、３０…前方部、３０ａ…内段、３０ｂ…雄螺子部、３０ｃ…外周面、３１…中間部、３１ａ…前端部（当接部）、
４…先口体、４ａ…先端開口部、４１…先口本体、４１ａ…雌螺子部、４２…後部筒状体、４２ａ…雄螺子部、４２ｂ…前端部（後方係止部）、４２ｃ…後端部（当接部）、
５…把持部、
６…芯繰出機構、
７…芯、７ａ…前端部、
８…ノック体、
９…芯タンク、９ａ…開口部、
１０…連結体、１０ａ…後方部、１０ｂ…前方部、１０ｃ…開口部、
１１…チャック、１１ａ…後端部、１１ｂ…頭部、
１２…円筒部材、１２ａ…外鍔、１２ｂ…内鍔、１２ｃ…開口部、１２ｄ…突起部、
１３…チャックスプリング、
１４…締リング、
１５…内先口、１５ａ…雌螺子部、１５ｂ…前端開口部、１５ｃ…芯ホルダー、１５ｄ…雄螺子部、１５ｅ…後方段部、１５ｆ…前方段部、
１６…フランジ体、１６ａ…フランジ（前方係止部）、１６ｂ…雌螺子部、
１７…コイルスプリング（弾発体）、
１８…円環部材、１８ａ…長手部、１８ｂ…前方脚部（傾斜面）、１８ｃ…後方脚部（傾斜面）、１８ｄ…内周面、１８ｅ…スリット、１８ｆ…端面、
１９…摺動部材、１９ａ…頂部、１９ｂ…前方側面（当接部）、１９ｃ…後方側面（当接部）、
Ｓ…隙間。 1 ... mechanical pencil,
2 ... shaft tube,
DESCRIPTION OF SYMBOLS 3 ... Shaft cylinder main body, 30 ... Front part, 30a ... Inner stage, 30b ... Male screw part, 30c ... Outer peripheral surface, 31 ... Middle part, 31a ... Front end part (contact part),
DESCRIPTION OF SYMBOLS 4 ... Front opening body, 4a ... Front-end opening part, 41 ... Front opening main body, 41a ... Female screw part, 42 ... Rear cylindrical body, 42a ... Male screw part, 42b ... Front end part (rear locking part), 42c ... Rear end (contact part),
5 ... gripping part,
6 ... Core feeding mechanism,
7 ... core, 7a ... front end,
8 ... Knock body,
9 ... core tank, 9a ... opening,
DESCRIPTION OF SYMBOLS 10 ... Connection body, 10a ... Back part, 10b ... Front part, 10c ... Opening part,
11 ... chuck, 11a ... rear end, 11b ... head,
12 ... Cylindrical member, 12a ... Outer collar, 12b ... Inner collar, 12c ... Opening, 12d ... Projection,
13 ... Chuck spring,
14 ... tightening ring,
15 ... Inner opening, 15a ... Female screw portion, 15b ... Front end opening, 15c ... Core holder, 15d ... Male screw portion, 15e ... Back step portion, 15f ... Front step portion,
16 ... flange body, 16a ... flange (front locking part), 16b ... female screw part,
17 ... Coil spring (bullet),
18 ... an annular member, 18a ... a longitudinal part, 18b ... a front leg (inclined surface), 18c ... a rear leg (inclined surface), 18d ... an inner peripheral surface, 18e ... a slit, 18f ... an end surface,
19 ... Sliding member, 19a ... Top, 19b ... Front side surface (contact portion), 19c ... Back side surface (contact portion),
S ... Gap.

Claims

軸筒が軸筒本体と該軸筒本体の前方に配した先口体と該先口体の後方に設けた把持部とを有し、前記先口体に、前記軸筒本体の内部に配した芯繰出機構で繰り出された芯が突出する先端開口部を設け、前記把持部に、前後に延びるスリットを有した環状部材を、前記軸筒本体の外周面から離間させて配し、前記環状部材の端部に該環状部材の外方から内方へ向かって内向きに傾斜する傾斜面を形成し、前記環状部材に隣設する当接部へ前記傾斜面を当接させ、前記芯繰出機構に設けた前方係止部と前記先口体に設けた後方係止部との間に弾発体を配し、前記環状部材のスリットの巾を狭めることにより、該環状部材の内周面を前記軸筒本体の外周面に接近させ、該環状部材の傾斜面を当該環状部材と隣設する前記当接部に摺接させて該当接部を軸心に沿った方向へ移動させながら、前記先口体を前記弾発体の弾発力に抗して前記芯繰出機構に対して前進させ、前記芯繰出機構に挟持された前記芯の前端部を前記先口体に没入させる構造の芯繰出具。 The shaft tube has a shaft tube main body, a front end body disposed in front of the shaft tube main body, and a grip portion provided at the rear of the front end body, and the shaft tube is disposed inside the shaft tube main body. A tip opening portion through which the lead fed out by the lead feeding mechanism is provided, and an annular member having a slit extending in the front-rear direction is provided in the gripping portion so as to be spaced apart from the outer peripheral surface of the shaft cylinder body, An inclined surface inclined inward from the outside of the annular member to the inside is formed at the end of the member, the inclined surface is brought into contact with an abutting portion adjacent to the annular member, and the core is extended. An inner peripheral surface of the annular member is provided by arranging an elastic body between a front engaging portion provided in the mechanism and a rear engaging portion provided in the front opening body, and narrowing the width of the slit of the annular member. Is brought close to the outer peripheral surface of the shaft cylinder body, and the inclined surface of the annular member is brought into sliding contact with the contact portion adjacent to the annular member, so that the corresponding contact portion. While moving in the direction along the axis, the front end of the lead held by the lead feeding mechanism is moved forward with respect to the lead feeding mechanism against the resilient force of the bullet. A core feeding tool having a structure in which a part is immersed in the tip body.

前記把持部に複数の環状部材を配し、前記複数の環状部材の間に前記軸筒本体の外周面と摺接して前後動する摺動部材を配し、前記摺動部材に前記環状部材の傾斜面と当接する当接部を設け、前記環状部材の内周面を前記軸筒本体の外周面に接近させることにより、前記環状部材の傾斜面を該環状部材と隣設した前記摺動部材に摺接させて軸心に沿った方向へ移動させる請求項１に記載の芯繰出具。 A plurality of annular members are disposed on the gripping portion, a sliding member that slides back and forth in contact with the outer peripheral surface of the shaft cylinder body is disposed between the plurality of annular members, and the annular member is disposed on the sliding member. The sliding member having an abutting portion that abuts against the inclined surface, and having the inner peripheral surface of the annular member approached the outer peripheral surface of the shaft tube main body, whereby the inclined surface of the annular member is provided adjacent to the annular member. The lead feeding tool according to claim 1, wherein the lead feeding tool is slidably contacted and moved in a direction along the axis.

軸筒が軸筒本体と該軸筒本体の前方に配した先口体と該先口体の後方に設けた把持部とを有し、前記先口体に、前記軸筒本体の内部に配した芯繰出機構で繰り出された芯が突出する先端開口部を設け、前記把持部に、前後に延びるスリットを有した環状部材を、前記軸筒本体の外周面から離間させて配し、前記環状部材と隣設する当接部に内方から外方へ向かって該環状部材から離れる方向に傾斜する外向きの傾斜面を形成し、前記当接部に隣設する前記環状部材へ前記傾斜面を当接させ、前記芯繰出機構に設けた前方係止部と前記先口体に設けた後方係止部との間に弾発体を配し、前記環状部材のスリットの巾を狭めることにより、該環状部材の内周面を前記軸筒本体の外周面に接近させ、前記当接部の傾斜面を該当接部と隣設する前記環状部材に摺接させて該環状部材を軸心に沿った方向へ移動させながら、前記先口体を前記弾発体の弾発力に抗して芯繰出機構に対して前進させ、前記芯繰出機構に挟持された前記芯の前端部を前記先口体に没入させる構造の芯繰出具。 The shaft tube has a shaft tube main body, a front end body disposed in front of the shaft tube main body, and a grip portion provided at the rear of the front end body, and the shaft tube is disposed inside the shaft tube main body. A tip opening portion through which the lead fed out by the lead feeding mechanism is provided, and an annular member having a slit extending in the front-rear direction is provided in the gripping portion so as to be spaced apart from the outer peripheral surface of the shaft cylinder body, An outwardly inclined surface that inclines in a direction away from the annular member from the inside toward the outside is formed in the contact portion adjacent to the member, and the inclined surface is provided to the annular member adjacent to the contact portion. By placing an elastic body between the front locking portion provided in the lead feeding mechanism and the rear locking portion provided in the leading end body, and narrowing the width of the slit of the annular member The annular member is configured such that the inner peripheral surface of the annular member approaches the outer peripheral surface of the shaft cylinder body, and the inclined surface of the contact portion is adjacent to the corresponding contact portion. While moving the annular member in a direction along the axial center while being in sliding contact with the member, the leading end body is advanced against the core feeding mechanism against the resilient force of the projecting body, and the core feeding is performed. A lead feeding tool having a structure in which a front end portion of the lead pinched by a mechanism is immersed in the front end body.

前記把持部に複数の環状部材を配し、前記複数の環状部材の間に前記軸筒本体の外周面と摺接して前後動する摺動部材を配し、前記環状部材と隣設する摺動部材に内方から外方へ向かって該環状部材から離れる方向に傾斜する外向きの傾斜面を形成して当接部とし、前記環状部材の内周面を前記軸筒本体の外周面に接近させることにより、前記摺動部材の傾斜面を該摺動部材と隣設した前記環状部材に摺接させて軸心に沿った方向へ移動させる請求項３に記載の芯繰出具。 A plurality of annular members are arranged in the gripping portion, and a sliding member that slides back and forth in contact with the outer peripheral surface of the shaft cylinder body is arranged between the plurality of annular members, and the sliding adjacent to the annular member. An outwardly inclined surface that inclines in a direction away from the annular member from the inside toward the outside is formed on the member as an abutment portion, and the inner peripheral surface of the annular member approaches the outer peripheral surface of the shaft cylinder body The lead feeding tool according to claim 3, wherein the inclined surface of the sliding member is brought into sliding contact with the annular member adjacent to the sliding member and moved in a direction along the axis.