JP3852172B2 - Sharp pencil - Google Patents
Sharp pencil Download PDFInfo
- Publication number
- JP3852172B2 JP3852172B2 JP22016097A JP22016097A JP3852172B2 JP 3852172 B2 JP3852172 B2 JP 3852172B2 JP 22016097 A JP22016097 A JP 22016097A JP 22016097 A JP22016097 A JP 22016097A JP 3852172 B2 JP3852172 B2 JP 3852172B2
- Authority
- JP
- Japan
- Prior art keywords
- slider
- core
- lead
- tank
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、軸筒内に芯の把持・解放を行うチャック体が配置され、また、ノック部材を押圧することによって芯の繰り出しを行うシャ−プペンシルに関する。
【0002】
【従来の技術】
芯繰り出し機構を内蔵するシャ−プペンシルの軸筒の後端に前記芯繰り出し機構を作動せしめるノック部材を有するシャ−プペンシルとして、実開昭61−125482号公報が知られている。先具の内側でチャック体の前方には、芯を保持する摺接片が形成されたスライダ部材が前後動自在に配置されている。また、そのスライダ部材の先端には、芯ガイドが固定されている。さらに、前記チャック体の後方には、芯タンクが取り付けられており、その芯タンクの後部には前記チャック体を前後動せしめ、芯を繰り出すノック部材が着脱自在に取り付けられている。
【0003】
【発明が解決しようとする課題】
しかし、上記従来技術にあっては、筆記による芯の摩耗に伴ってスライダ部材が後退するため、芯ガイド内に芯が没入していても筆記することができ、もって、芯が露出せず芯の中間部における折損が防止できるものの、筆記により芯の先端が片減りし、芯の先端が鋭角な形状になってしまい、その状態でシャ−プペンシルを持ち変え再び筆記すると鋭角な部分が、紙面に当接する際の衝撃や筆記圧力によって折損してしまうものであった。そして、折損した状態で筆記すると、紙面に折損した芯の先端がひっかかった状態となり、非常に違和感があった。
また、芯の先端が片減りすると、芯の端面が楕円状になってしまい、その結果、筆記線の幅が次第に太くなってしまうものであった。ここで、細い状態の筆記線の幅を保つためには、細い径の芯で筆記する方法もあるが、芯が細いため折損強度が低下してしまう。
【0004】
【課題を解決するための手段】
本発明は、上記問題点に鑑みてなされたものであり、軸筒内に芯の把持・解放を行うチャック体が配置され、また、前記軸筒の中間部の側面に配置されたノック部材を押圧することによって芯の繰り出しを行うシャ−プペンシルであって、前記ノック部材を押圧することによって前進するスライダ−を前記軸筒内に配置し、そのスライダ−の内側に芯タンクを摺動自在に配置すると共に、その芯タンクの前方に前記スライダ−の前端面と当接する鍔部を形成し、また、前記チャック体を芯タンクの前方に固定すると共に、その芯タンクには回転子を回転不能に取り付けるが、前記軸筒に対しては回転可能に配置すると共に、その回転子の後方に摺動子を配置し、その摺動子の後端面に前記芯タンクに形成した後 端鍔部を当接させ、前記ノック部材の押圧動作によって前記芯タンク、並びに、摺動子を移動せしめ、その摺動子の移動によって回転子を回転せしめると共に、その回転子の回転によって前記芯タンクに固定されたチャック体を回転させるチャック体回転手段を備えたことを要旨とするものである。
【0005】
【実施例】
第1例を図1〜図7に示し説明する。軸筒1の中間部の側面にノック駒(ノック部材)30を配置せしめることによって、軸筒1(シャ−プペンシル)を持ち変えることなく、芯の回転操作、並びに、芯の繰り出し操作を行えるようにした例である。以下、具体的に説明する。軸筒1の内側には、スライダ−31が前後動可能に配置されており、そのスライダ−31の側面には、傾斜面32が形成された押圧凸部33が前後に2箇所形成されている。一方、前記軸筒1の側面に形成された窓孔34に配置されたノック駒30の側面には、前記押圧凸部33の傾斜面32に当接・摺動する係合片34が形成されている。尚、その係合片34には、前記押圧凸部33との当接・摺動性を良くするために傾斜面部35が形成されている。
【0006】
前記スライダ−31の内側には、芯タンク36が摺動自在に配置されており、その芯タンク36の前方には、前記スライダ−31の前端面と当接する鍔部37が形成されている。また、その鍔部37の前方の芯タンク36の側面には、対向する位置に縦リブ38が形成されている。
前記芯タンク36の前方には、中継ぎ部材39が弾撥部材40によって後方に付勢された状態で配置されている。その中継ぎ部材39の後方には、大径筒部41が形成されており、その大径筒部41の内面には、前記芯タンク36の縦リブ38が係合・摺動する縦溝42が形成されている。尚、中継ぎ部材39の前方には、前例と同様にチャック体3やチャックリング4が設けられている。符号5は、軸筒1の前端に着脱自在に取り付けられた先部材であり、芯戻り止め部材6が内接している。
【0007】
前記芯タンク36の後方には、対向する位置に突部43が形成されており、その突部43は回転子11のスリット12に、回転不能ではあるが前後動可能な位置に設けられている。また、回転子11の後方には、摺動子13が配置されている。そして、回転子11や摺動子13に形成されている縦リブ19、21は、カム部23の縦溝25に前後動可能に係合している。このカム部23は、軸筒1とは別体で形成してある。また、前記芯タンク36の後端には、後端鍔部44が形成されており、前記摺動子13の後端面に当接し得るようになっている。
尚、前記軸筒1の中間部の内側には、環状リング45が固定されており、その環状リング45と回転子11との間には弾撥部材46が張設されている。
符号47はキャップであり、そのキャップ47にはクリップ48が一体形成されている。
【0008】
次に作用について説明する(図5、図6参照)。筆記している最中に、芯が片減りし筆記線が太くなってしまった場合には、芯を紙面に当接させながら、或いは、シャープペンシルを一旦、紙面より持ち上げ、ノック駒30を押圧する。この押圧動作により、スライダ−31が前進すると共に、そのスライダ−31の前端面と芯タンク36の鍔部37との当接によって、その芯タンク36も弾撥部材46の弾撥力に抗しながら前進する。そして、芯タンクの36の前進によって、その芯タンク36の後端鍔部44が摺動子13を前進せしめる。この摺動子13の前進に伴い、その摺動子13の突起21の山形傾斜面22が回転子11の縦リブ19の傾斜面20を押圧する。そして、この押圧動作によって回転子11が前進し、カム部23の縦溝部25から前記回転子11の縦リブ19が外れると共に、山形傾斜面22と傾斜面20との係合によって回転子11が回転する。そして、この回転により回転子11は、前記カム部23の傾斜面26と縦リブ19の傾斜面20との摺接により、また、弾撥部材46の後方への付勢力によって傾斜面26に案内されながら回転・後退する。
【0009】
この回転子11の回転により芯タンク36が回転せしめられ、その芯タンク36の縦リブ38と中継ぎ部材39のスリット42との係合により、中継ぎ部材39に固定されているチャック体3とそのチャック体3に把持されている芯Lが回転する。
尚、このとき、芯タンク36の下端面と中継ぎ部材39との間には、隙間が形成されているので、また、芯タンク36の縦リブ38が中継ぎ部材39のスリット42を摺動するので、芯タンク36は押圧されることもなく、よって、前進せず、芯Lが繰り出されない。
芯を繰り出す場合には、前記ノック駒30をさらに押圧する。この押圧操作によって、芯タンク36の下端内面が中継ぎ部材39に当接し、その中継ぎ部材39を押圧前進せしめる。そして、その中継ぎ部材39の押圧前進によってチャック体3も前進し、芯Lが繰り出される(図12参照)。
【0010】
【発明の効果】
本発明は、軸筒内に芯の把持・解放を行うチャック体が配置され、また、前記軸筒の中間部の側面に配置されたノック部材を押圧することによって芯の繰り出しを行うシャ−プペンシルであって、前記ノック部材を押圧することによって前進するスライダ−を前記軸筒内に配置し、そのスライダ−の内側に芯タンクを摺動自在に配置すると共に、その芯タンクの前方に前記スライダ−の前端面と当接する鍔部を形成し、また、前記チャック体を芯タンクの前方に固定すると共に、その芯タンクには回転子を回転不能に取り付けるが、前記軸筒に対しては回転可能に配置すると共に、その回転子の後方に摺動子を配置し、その摺動子の後端面に前記芯タンクに形成した後端鍔部を当接させ、前記ノック部材の押圧動作によって前記芯タンク、並びに、摺動子を移動せしめ、その摺動子の移動によって回転子を回転せしめると共に、その回転子の回転によって前記芯タンクに固定されたチャック体を回転させるチャック体回転手段を備えたので、芯に片減りが発生せず、芯の先端の折損が防止されると共に、一定の幅の筆記線を描くことができる。
【図面の簡単な説明】
【図1】 本発明の1例を示す縦断面図。
【図2】 要部部品を示す斜視図。
【図3】 要部部品を示す面斜視図。
【図4】 図1のB−B線断面図。
【図5】 要部部品を示す面斜視図。
【図6】 芯の回転動作を示す縦断面図。
【図7】 芯の繰り出し動作を示す縦断面図。
【符号の説明】
1 軸筒
3 チャック体
4 チャックリング
5 先部材
6 芯戻り止め部材
11 回転子
12 スリット
13 摺動子
19 縦リブ
20 傾斜面部
21 縦リブ
22 山形傾斜面
23 カム部
25 縦溝部
26 傾斜面
30 ノック駒
31 スライダ−
32 傾斜面
33 押圧凸部
34 窓孔
35 傾斜面部
36 芯タンク
37 鍔部
38 縦リブ
39 中継ぎ部材
40 弾撥部材
41 大径筒部
42 縦溝
43 突部
44 後端鍔部
45 環状リング
46 弾撥部材
47 キャップ
48 クリップ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sharp pencil in which a chuck body for gripping and releasing a core is disposed in a shaft cylinder, and the core is extended by pressing a knock member.
[0002]
[Prior art]
Japanese Utility Model Laid-Open No. 61-125482 is known as a sharp pencil having a knock member for operating the lead feeding mechanism at the rear end of the shaft cylinder of the sharp pencil incorporating the lead feeding mechanism. A slider member on which a sliding contact piece for holding the core is formed is disposed in front of the chuck body inside the tip so as to be movable back and forth. A lead guide is fixed to the tip of the slider member. Further, a lead tank is attached to the rear of the chuck body, and a knock member for moving the chuck body back and forth and feeding the lead is detachably attached to the rear part of the lead tank.
[0003]
[Problems to be solved by the invention]
However, in the above prior art, since the slider member is retracted as the lead is worn by writing, writing can be performed even if the lead is immersed in the lead guide, and the lead is not exposed. Although the breakage at the middle part of the core can be prevented, the tip of the lead is reduced by writing and the tip of the lead becomes an acute shape, and if you change the sharp pencil in that state and write again, the sharp part becomes It breaks due to impact and writing pressure when it comes into contact. When writing in a broken state, the tip of the broken core was caught on the paper surface, which was very uncomfortable.
In addition, when the tip of the lead is reduced, the end surface of the lead becomes elliptical, and as a result, the width of the writing line gradually increases. Here, in order to maintain the width of the thin writing line, there is a method of writing with a thin diameter lead, but the breakage strength is reduced because the lead is thin.
[0004]
[Means for Solving the Problems]
The present invention has been made in view of the above problems, and a chuck body for gripping and releasing a core is disposed in a shaft cylinder, and a knock member disposed on a side surface of an intermediate portion of the shaft cylinder is provided. A sharp pencil for feeding a lead by pressing, a slider that moves forward by pressing the knock member is disposed in the shaft cylinder, and a lead tank is slidable inside the slider. In addition, the hook body is formed in front of the lead tank to contact the front end surface of the slider, and the chuck body is fixed to the front of the lead tank, and the rotor cannot be rotated in the lead tank. attached is in, along with the rotatably arranged relative to the barrel, a slider disposed behind the rotor, the Tantsuba portion after forming the lead tank to the rear end surface of the slider brought into contact, the knock The lead tank by pressing action wood, as well as moved the slider, the allowed to rotate the rotor by movement of the slider, rotates the chuck body fixed to the lead tank by the rotation of that rotor The gist of the present invention is to provide chuck body rotating means.
[0005]
【Example】
A first example will be described with reference to FIGS. By arranging the knock piece (knock member) 30 on the side surface of the intermediate portion of the shaft tube 1, the core can be rotated and the core can be fed out without changing the shaft tube 1 (sharp pencil). This is an example. This will be specifically described below. A slider 31 is arranged on the inner side of the shaft cylinder 1 so as to be able to move back and forth. On the side surface of the slider 31, two pressing protrusions 33 each having an inclined surface 32 are formed in the front and rear. . On the other hand, on the side surface of the knock piece 30 disposed in the window hole 34 formed on the side surface of the shaft cylinder 1, an engagement piece 34 that contacts and slides on the inclined surface 32 of the pressing convex portion 33 is formed. ing. In addition, an inclined surface portion 35 is formed on the engagement piece 34 in order to improve the contact / slidability with the pressing convex portion 33.
[0006]
A lead tank 36 is slidably disposed inside the slider 31, and a flange 37 is formed in front of the lead tank 36 to contact the front end surface of the slider 31. Further, vertical ribs 38 are formed on the side surfaces of the core tank 36 in front of the collar portion 37 at opposing positions.
A relay member 39 is disposed in front of the core tank 36 in a state of being urged rearward by the elastic member 40. A large-diameter cylindrical portion 41 is formed behind the intermediate member 39, and a vertical groove 42 in which the vertical rib 38 of the core tank 36 engages and slides is formed on the inner surface of the large-diameter cylindrical portion 41. Is formed. A chuck body 3 and a chuck ring 4 are provided in front of the intermediate member 39 as in the previous example. Reference numeral 5 denotes a tip member that is detachably attached to the front end of the shaft tube 1, and a core detent member 6 is inscribed therein.
[0007]
A protrusion 43 is formed at a position opposite to the rear of the core tank 36, and the protrusion 43 is provided in the slit 12 of the rotor 11 at a position where it cannot rotate but can move back and forth. . Further, a slider 13 is disposed behind the rotor 11. The vertical ribs 19 and 21 formed on the rotor 11 and the slider 13 are engaged with the vertical groove 25 of the cam portion 23 so as to be movable back and forth. The cam portion 23 is formed separately from the shaft cylinder 1. Further, a rear end flange 44 is formed at the rear end of the lead tank 36 so that it can come into contact with the rear end surface of the slider 13.
An annular ring 45 is fixed inside the intermediate portion of the shaft cylinder 1, and an elastic member 46 is stretched between the annular ring 45 and the rotor 11.
Reference numeral 47 denotes a cap, and a clip 48 is formed integrally with the cap 47.
[0008]
Next, the operation will be described (see FIGS. 5 and 6). While writing, if the lead is reduced and the writing line becomes thicker, either press the knocking piece 30 while lifting the mechanical pencil once while the lead is in contact with the paper. To do. By this pressing operation, the slider 31 moves forward, and the lead tank 36 also resists the resilience of the resilience member 46 due to the contact between the front end surface of the slider 31 and the flange 37 of the lead tank 36. While moving forward. Then, as the lead tank 36 advances, the rear end flange 44 of the lead tank 36 advances the slider 13. As the slider 13 advances, the angled inclined surface 22 of the protrusion 21 of the slider 13 presses the inclined surface 20 of the vertical rib 19 of the rotor 11. Then, the rotor 11 moves forward by this pressing operation, the vertical rib 19 of the rotor 11 is removed from the vertical groove portion 25 of the cam portion 23, and the rotor 11 is moved by the engagement between the angled inclined surface 22 and the inclined surface 20. Rotate. By this rotation, the rotor 11 is guided to the inclined surface 26 by the sliding contact between the inclined surface 26 of the cam portion 23 and the inclined surface 20 of the vertical rib 19 and by the urging force of the elastic member 46 to the rear. Rotate and retreat while being done.
[0009]
The rotation of the rotor 11 causes the lead tank 36 to rotate, and the chuck body 3 fixed to the joint member 39 and its chuck are engaged by the engagement between the vertical ribs 38 of the lead tank 36 and the slits 42 of the joint member 39. The core L held by the body 3 rotates.
At this time, since a gap is formed between the lower end surface of the core tank 36 and the intermediate member 39, the vertical rib 38 of the core tank 36 slides on the slit 42 of the intermediate member 39. The lead tank 36 is not pressed and therefore does not move forward and the lead L is not fed out.
When the lead is extended, the knock piece 30 is further pressed. By this pressing operation, the inner surface of the lower end of the lead tank 36 comes into contact with the intermediate member 39, and the intermediate member 39 is pushed forward. Then, the chuck body 3 is also moved forward by the forward pressing of the intermediate member 39, and the lead L is fed out (see FIG. 12).
[0010]
【The invention's effect】
According to the present invention, a chuck body is provided in which a chuck body for gripping and releasing the core is disposed in the shaft cylinder, and the core is extended by pressing a knock member disposed on a side surface of an intermediate portion of the shaft cylinder. A slider that moves forward by pressing the knock member is disposed in the shaft cylinder, a core tank is slidably disposed inside the slider, and the slider is disposed in front of the core tank. -Forms a flange that abuts the front end surface, and fixes the chuck body to the front of the lead tank and attaches a rotor to the lead tank in a non-rotatable manner. thereby enabling positioning, the slider is arranged at the rear of the rotor, is brought into contact with the rear end flange portion formed on the lead tank to the rear end surface of the slider, wherein the pressing operation of the knock member Core tank, average In, moved the slider, the allowed to rotate the rotor by movement of the slider, because with a chuck member rotation means for rotating the fixed chuck body to the lead tank by the rotation of that rotor The core is not reduced, the breakage of the tip of the core is prevented, and a writing line having a certain width can be drawn.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an example of the present invention.
FIG. 2 is a perspective view showing essential parts.
FIG. 3 is a perspective view showing a main part.
4 is a cross-sectional view taken along line BB in FIG.
FIG. 5 is a perspective view showing a main part.
FIG. 6 is a longitudinal sectional view showing the rotation operation of the core.
FIG. 7 is a longitudinal sectional view showing a lead feeding operation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shaft cylinder 3 Chuck body 4 Chuck ring 5 Tip member 6 Core detent member 11 Rotor 12 Slit 13 Slider 19 Vertical rib 20 Inclined surface part 21 Vertical rib 22 Angle-shaped inclined surface 23 Cam part 25 Vertical groove part 26 Inclined surface 30 Knock Koma 31 slider
32 Inclined surface 33 Pressing convex portion 34 Window hole 35 Inclined surface portion 36 Core tank 37 Gutter portion 38 Vertical rib 39 Reinforcement member 40 Repelling member 41 Large diameter cylindrical portion 42 Vertical groove 43 Protruding portion 44 Rear end flange portion 45 Ring ring 46 Repellent material 47 Cap 48 Clip
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22016097A JP3852172B2 (en) | 1997-07-31 | 1997-07-31 | Sharp pencil |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22016097A JP3852172B2 (en) | 1997-07-31 | 1997-07-31 | Sharp pencil |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH1148680A JPH1148680A (en) | 1999-02-23 |
JP3852172B2 true JP3852172B2 (en) | 2006-11-29 |
Family
ID=16746834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22016097A Expired - Lifetime JP3852172B2 (en) | 1997-07-31 | 1997-07-31 | Sharp pencil |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3852172B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2708373A1 (en) | 2012-09-18 | 2014-03-19 | Micro Co., Ltd. | Mechanical pencil |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4706400B2 (en) * | 2005-08-31 | 2011-06-22 | ぺんてる株式会社 | Writing instrument shaft |
JP5288992B2 (en) * | 2008-10-28 | 2013-09-11 | 三菱鉛筆株式会社 | mechanical pencil |
JP5705430B2 (en) | 2009-11-20 | 2015-04-22 | 株式会社壽 | mechanical pencil |
JP5711048B2 (en) * | 2011-05-30 | 2015-04-30 | ゼブラ株式会社 | mechanical pencil |
JP5711047B2 (en) * | 2011-05-30 | 2015-04-30 | ゼブラ株式会社 | mechanical pencil |
JP7340447B2 (en) * | 2019-12-25 | 2023-09-07 | 株式会社パイロットコーポレーション | electronic pen |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS518242U (en) * | 1974-07-08 | 1976-01-21 | ||
JPH0719835Y2 (en) * | 1989-11-15 | 1995-05-10 | 株式会社壽 | Ballpoint pen |
JPH08324181A (en) * | 1995-05-30 | 1996-12-10 | Kotobuki:Kk | Side knock type ball-point pen |
-
1997
- 1997-07-31 JP JP22016097A patent/JP3852172B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2708373A1 (en) | 2012-09-18 | 2014-03-19 | Micro Co., Ltd. | Mechanical pencil |
US9180722B2 (en) | 2012-09-18 | 2015-11-10 | Micro Co., Ltd. | Mechanical pencil having lead-rotating mechanism |
Also Published As
Publication number | Publication date |
---|---|
JPH1148680A (en) | 1999-02-23 |
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