JPH0649085U - Mechanical pencil chuck - Google Patents
Mechanical pencil chuckInfo
- Publication number
- JPH0649085U JPH0649085U JP9126892U JP9126892U JPH0649085U JP H0649085 U JPH0649085 U JP H0649085U JP 9126892 U JP9126892 U JP 9126892U JP 9126892 U JP9126892 U JP 9126892U JP H0649085 U JPH0649085 U JP H0649085U
- Authority
- JP
- Japan
- Prior art keywords
- core
- lead
- gripping portion
- tightening
- mechanical pencil
- 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.)
- Granted
Links
Landscapes
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
(57)【要約】
【目的】 芯把持部の全体の締め付け力が均一化して、
芯把持部の一部、特に前端部位の締め付け力が過大にな
るのを防止して、芯の圧潰等の弊害を解消できるシャー
プペンシルのチャックを提供する。
【構成】 割り７を設けて内径を弾性的に拡縮可能と
し、且つ外面に勾配５を設けた芯把持部２を前端に有し
て、その芯把持部２の外周に前進することにより芯把持
部２の締め付けを強め、且つ後退することにより芯把持
部２に対する締め付けを緩める締付リング１１を取付け
て成るシャープペンシルのチャックにおいて、芯把持部
２における割り面８の前端位置に凸部９を設ける。
(57) [Summary] [Purpose] The tightening force of the whole core gripping part is made uniform,
(EN) Provided is a mechanical pencil chuck capable of preventing an excessive tightening force of a part of a lead gripping part, particularly a front end part thereof, and solving a problem such as crushing of a lead. [Structure] A core gripping portion 2 having a split 7 is provided so that the inner diameter can be elastically expanded and contracted, and an outer surface is provided with a slope 5 at the front end, and the core gripping portion 2 is advanced to the outer periphery of the core gripping portion 2 to grip the core. In a mechanical pencil chuck having a tightening ring 11 for tightening and retreating the portion 2 to loosen the tightening with respect to the lead gripping portion 2, a protrusion 9 is provided at the front end position of the split surface 8 in the lead gripping portion 2. Set up.
Description
【０００１】[0001]
本考案はシャープペンシルのチャックに関する。 The present invention relates to a mechanical pencil chuck.
【０００２】[0002]
シャープペンシルのチャックは、一般的に、割りを設けて内径を弾性的に拡縮 可能とし且つ外面に勾配を設けた芯把持部を前端に有して、その芯把持部の外周 に前進することにより芯把持部の締め付けを強め且つ後退することにより芯把持 部に対する締め付けを緩める締付リングを取付けた構成となっている。 Mechanical pencil chucks generally have a core gripping part with a split to allow elastic expansion and contraction of the inner diameter and a sloped outer surface at the front end to advance to the outer circumference of the core gripping part. The structure is equipped with a tightening ring that tightens and retracts the lead gripping part to loosen the lead gripping part.
【０００３】 この種の構造のシャープペンシルのチャックは、芯把持部が片持ばりのように 撓むので、芯把持部の前端寄りほど撓み量が大きくなって、芯把持部の各部位の 締め付け力が不均一になり、特に芯把持部の前端の締め付け力が過大になって芯 を圧潰することがあった。In the mechanical pencil chuck of this kind of structure, the lead gripping portion bends like a cantilever, so the amount of deflection increases toward the front end of the lead gripping portion, and the tightening of each portion of the lead gripping portion is increased. The force became uneven, and in particular, the tightening force at the front end of the lead gripping part became excessive, which sometimes crushed the lead.
【０００４】[0004]
そこで本考案は、芯把持部の全体の締め付け力が均一化して、芯把持部の一部 特に前端部位の締め付け力が過大になるのを防止して、芯の圧潰等の弊害を解消 できるシャープペンシル用チャックの提供を目的とする。 In view of this, the present invention makes it possible to even out the tightening force of the whole core gripping part and prevent the tightening force of a part of the core gripping part, particularly the front end part, from becoming excessive, and to eliminate the adverse effects such as crushing of the core. The purpose is to provide a pencil chuck.
【０００５】[0005]
上記目的を達成するために、本考案のシャープペンシルのチャックは、割り７ を設けて内径を弾性的に拡縮可能とし、且つ外面に勾配５を設けた芯把持部２を 前端に有して、その芯把持部２の外周に前進することにより芯把持部２の締め付 けを強め、且つ後退することにより芯把持部２に対する締め付けを緩める締付リ ング１１を取付けて成るシャープペンシルのチャックにおいて、芯把持部２にお ける割り面８の前端位置に凸部９を設けたことを特徴とするものである。 In order to achieve the above-mentioned object, the mechanical pencil chuck of the present invention is provided with a split 7 to allow elastic expansion / contraction of the inner diameter, and has a lead gripping portion 2 having a slope 5 on the outer surface at the front end. A mechanical pencil chuck having a tightening ring 11 for advancing to the outer periphery of the lead gripping part 2 to strengthen the tightening of the lead gripping part 2 and retreating to loosen the tightening on the lead gripping part 2. The protrusion 9 is provided at the front end position of the split surface 8 in the lead gripping portion 2.
【０００６】[0006]
芯把持部２の割り面８に設けた凸部９によって、締付リング１１が前進したと きでも、芯把持部２の前端の割り面８は密着せず凸部の高さだけの隙間を維持す るので、芯把持孔６の前端の内径の縮小量が減少して、締め付け力は芯把持部２ の全体にわたって略均一化する。 Even when the tightening ring 11 is moved forward by the convex portion 9 provided on the split surface 8 of the lead gripping portion 2, the split surface 8 at the front end of the lead gripping portion 2 does not come into close contact with each other, leaving a gap corresponding to the height of the projecting portion. Since this is maintained, the reduction amount of the inner diameter of the front end of the core gripping hole 6 is reduced, and the tightening force is substantially uniform over the entire core gripping portion 2.
【０００７】[0007]
図は本考案の一実施例を示したものである。このチャック１は合成樹脂製で、 前端に芯把持部２を有し、その後方にバネ性を備えた薄肉筒部３を有し、更にそ の後方に芯ガイド筒部４を有している。芯把持部２は薄肉筒部３や芯ガイド筒部 ４に比べて外径が大きく、且つ、その外面には前方へ向って外径を次第に増大す る勾配５を設けている。また、芯把持部２の中心部には薄肉筒部３や芯ガイド筒 部４に比べて内径の小さい芯把持孔６を設けている。チャック１は芯把持部２の 前端から薄肉筒部３の略後端まで割り７を設けていて、芯把持部２は内外方向へ 弾性変形可能で、その中心部の芯把持孔６の内径を拡縮可能としている。芯把持 部２の割り面８における前端で且つ芯把持孔６の両側位置にはそれぞれ円板状の 凸部９を設けている。又、芯把持部２の側面における先端近傍にはストッパ１０ を突設している。芯把持部２の外周には締付リング１１を前後動可能に取付けて いる。しかし、締付リング１１は上記のストッパ１０によって前進を阻止される ことになる。芯把持部２の後方に続く薄肉筒部３は、締付リング１１が芯把持部 ２を締め付けようとするのに対し、そのバネ性によって芯把持部２を外側へ拡開 させようとする。又、薄肉筒部３の後方に続く芯ガイド筒部４の外面の複数箇所 には芯ケース（図示せず）に対する係止リブ１２を設けている。 The figure shows an embodiment of the present invention. This chuck 1 is made of synthetic resin, has a core grip portion 2 at the front end, a thin-walled cylinder portion 3 having spring properties behind it, and a core guide cylinder portion 4 behind it. . The core gripping portion 2 has a larger outer diameter than the thin-walled cylinder portion 3 and the core guide cylinder portion 4, and the outer surface thereof is provided with a slope 5 which gradually increases in outer diameter toward the front. Further, a core gripping hole 6 having a smaller inner diameter than the thin-walled cylinder portion 3 and the core guide cylinder portion 4 is provided at the center of the core gripping portion 2. The chuck 1 is provided with a split 7 from the front end of the core gripping portion 2 to the substantially rear end of the thin-walled cylinder portion 3, and the core gripping portion 2 is elastically deformable inward and outward, and the inner diameter of the core gripping hole 6 at the center thereof is It can be scaled. Disc-shaped projections 9 are provided at the front end of the split surface 8 of the lead gripping portion 2 and on both sides of the lead gripping hole 6. Further, a stopper 10 is provided in the vicinity of the tip on the side surface of the lead grip portion 2. A tightening ring 11 is attached to the outer circumference of the lead gripping portion 2 so as to be movable back and forth. However, the tightening ring 11 is prevented from advancing by the stopper 10. The thin-walled tubular portion 3 following the lead gripping portion 2 tries to tighten the lead gripping portion 2 by the tightening ring 11, but tries to expand the lead gripping portion 2 outward due to its springiness. Further, locking ribs 12 for a core case (not shown) are provided at a plurality of locations on the outer surface of the core guide cylinder 4 which follows the thin cylinder part 3.
【０００８】 締付リング１１を芯把持部２の前方部位へ移動させると、芯把持部２は締付リ ング１１により中心方向へ圧縮される。このとき、芯把持部２と薄肉筒部３は、 薄肉筒部３における略後端位置ａを支持部として片持ばりのように撓むので、芯 把持部２の前端寄りほど撓み量が大きくなる。即ち、芯把持孔６は前端寄りほど 内径が縮小する。しかしながら、芯把持部２における割り面８の前端に凸部９を 設けることによって芯把持孔６の前端の内径の縮小を阻止するので、芯把持孔６ の内径の縮小は全体にわたって略均一となり、芯に対する締め付け力も略均一化 する。尚、芯把持部２の側面に設けたストッパ１０によって、締付リング１１は 芯把持部２の前端まで移動できないので、これにより芯把持部２の締め付け力が 過大になるのを、より効果的に回避することができる。When the tightening ring 11 is moved to the front part of the lead gripping part 2, the lead gripping part 2 is compressed toward the center by the tightening ring 11. At this time, the core gripping portion 2 and the thin-walled cylinder portion 3 bend like a cantilever with the substantially rear end position a of the thin-walled cylinder portion 3 as a support portion, and thus the bending amount increases toward the front end of the core gripping portion 2. Become. That is, the inner diameter of the core gripping hole 6 is reduced toward the front end. However, since the projection 9 is provided at the front end of the split surface 8 in the core gripping portion 2 to prevent the inner diameter of the front end of the core gripping hole 6 from being reduced, the reduction of the inner diameter of the core gripping hole 6 becomes substantially uniform, The tightening force on the core is also made almost uniform. Since the tightening ring 11 cannot be moved to the front end of the core gripping part 2 by the stopper 10 provided on the side surface of the core gripping part 2, it is more effective that the tightening force of the core gripping part 2 becomes excessive. Can be avoided.
【０００９】[0009]
本考案は上記の通りであり、芯把持部の一部、特に前端位置の締め付け力が過 大にならないように芯把持部の全体の締め付け力を略均一化することができるの で、芯の圧潰等の弊害が解消するものである。 The present invention is as described above, and since the tightening force of the whole core gripping portion can be made substantially uniform so that the tightening force at a part of the core gripping portion, particularly the front end position is not excessive, The problem such as crushing is eliminated.
【図１】正面図である。FIG. 1 is a front view.
【図２】断面図である。FIG. 2 is a sectional view.
【図３】図１のＡ−Ａ線断面図である。3 is a cross-sectional view taken along the line AA of FIG.
【図４】図１のＢ−Ｂ線断面図である。FIG. 4 is a sectional view taken along line BB in FIG.
１ チャック ２ 芯把持部 ３ 薄肉筒部 ４ 芯ガイド筒部 ５ 勾配 ６ 芯把持孔 ７ 割り ８ 割り面 ９ 凸部 １０ ストッパ １１ 締付リング １２ 係止リブ DESCRIPTION OF SYMBOLS 1 chuck 2 core gripping part 3 thin-walled cylinder part 4 core guide cylinder part 5 gradient 6 core gripping hole 7 split 8 split surface 9 convex part 10 stopper 11 tightening ring 12 locking rib
Claims (1)
とし、且つ外面に勾配５を設けた芯把持部２を前端に有
して、その芯把持部２の外周に前進することにより芯把
持部２の締め付けを強め、且つ後退することにより芯把
持部２に対する締め付けを緩める締付リング１１を取付
けて成るシャープペンシルのチャックにおいて、芯把持
部２における割り面８の前端位置に凸部９を設けたこと
を特徴とするシャープペンシルのチャック。1. A core gripping part (2) having a split (7) for elastically expanding and contracting the inner diameter and having a slope (5) on its outer surface is provided at the front end and is advanced to the outer circumference of the core gripping part (2). A mechanical pencil chuck having a tightening ring 11 for tightening and retreating the lead gripping portion 2 to loosen the lead gripping portion 2. In a chuck of a mechanical pencil, a protrusion is provided at the front end position of the split surface 8 in the lead gripping portion 2. Mechanical pencil chuck characterized by having 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992091268U JP2575316Y2 (en) | 1992-12-15 | 1992-12-15 | Mechanical pencil chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992091268U JP2575316Y2 (en) | 1992-12-15 | 1992-12-15 | Mechanical pencil chuck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0649085U true JPH0649085U (en) | 1994-07-05 |
| JP2575316Y2 JP2575316Y2 (en) | 1998-06-25 |
Family
ID=14021696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992091268U Expired - Fee Related JP2575316Y2 (en) | 1992-12-15 | 1992-12-15 | Mechanical pencil chuck |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2575316Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015205416A (en) * | 2014-04-17 | 2015-11-19 | 株式会社パイロットコーポレーション | Mechanical pencil |
-
1992
- 1992-12-15 JP JP1992091268U patent/JP2575316Y2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015205416A (en) * | 2014-04-17 | 2015-11-19 | 株式会社パイロットコーポレーション | Mechanical pencil |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2575316Y2 (en) | 1998-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980210 |
|
| LAPS | Cancellation because of no payment of annual fees |