JPH034090U

JPH034090U -

Info

Publication number: JPH034090U
Application number: JP6325389U
Authority: JP
Priority date: 1989-06-01
Filing date: 1989-06-01
Publication date: 1991-01-16

Description

[Brief explanation of drawings]

第１図は本考案の一実施例である芯出没式シヤ
ープペンシルの縦断面図を示している。第２図は
同シヤープペンシルの部品展開を示す斜視図であ
る。第３図は芯を掴んだ状態を示した要部断面図
、第４図はチヤツクを開放した状態を示した要部
断面図、第５図はチヤツクの先端部を締めリング
に係合させて、芯を保持できる状態を示した要部
断面図を示している。第６図乃至第８図は芯ケー
スのカム部、芯ケースに遊嵌した円筒カム、後軸
の内径部に一体に形成されたカム部を示した説明
図で、第６図は第３図に、第７図は第４図に、又
、第８図は第５図にそれぞれ対応した状態を示し
ている。１…チヤツク、２…第１の締めリング、３…第
２の締めリング、４…押ばね、５…口金、６…保
持チヤツク、７…軸継手、８…チヤツクスプリン
グ、９…芯ケース、１０…カム部、１１…溝、１
２…円筒カム、１３…段部、１４，１５…カム斜
面、１６…段部、１７，１８…カム斜面、１９…
段部、２２…凸部、２３…リブ、２４…後軸、２
５…凹部、２６…リング部、２７…先端テーパー
部、２８…段部、２９…後端部、３０…クリツプ
、３１…カム部、３２…消ゴム、３３…カバー、
３５…突起、３６…取付け部、３７…取付け部。 FIG. 1 shows a longitudinal sectional view of a retractable lead type sharpening pencil which is an embodiment of the present invention. FIG. 2 is a perspective view showing the developed parts of the same mechanical pencil. Figure 3 is a cross-sectional view of the main part showing the state in which the lead is gripped, Figure 4 is a cross-sectional view of the main part showing the chuck in the open state, and Figure 5 is a cross-sectional view of the main part showing the chuck in the state where the tip is tightened and engaged with the ring. , shows a cross-sectional view of the main part showing a state in which the core can be held. Figures 6 to 8 are explanatory views showing the cam part of the core case, the cylindrical cam loosely fitted into the core case, and the cam part integrally formed on the inner diameter part of the rear shaft, and Figure 6 is the same as Figure 3. 7 shows a state corresponding to FIG. 4, and FIG. 8 shows a state corresponding to FIG. 5. DESCRIPTION OF SYMBOLS 1...chuck, 2...first tightening ring, 3...second tightening ring, 4...pressing spring, 5...mouthpiece, 6...retaining chuck, 7...shaft coupling, 8...chuck spring, 9...core case, 10...Cam part, 11...Groove, 1
2... Cylindrical cam, 13... Step part, 14, 15... Cam slope, 16... Step part, 17, 18... Cam slope, 19...
Stepped portion, 22... Convex portion, 23... Rib, 24... Rear shaft, 2
5... Recessed part, 26... Ring part, 27... Tapered tip part, 28... Step part, 29... Rear end part, 30... Clip, 31... Cam part, 32... Eraser, 33... Cover,
35...Protrusion, 36...Attachment part, 37...Attachment part.

Claims

[Scope of utility model registration request]

The chuck connected to the core case inside the shaft is biased toward the retracting side by a chuck spring, and when the chuck engages with the first tightening ring, it grips the core and moves the chuck forward to separate from the tightening ring. When I did,
In a sharp pencil constructed so that when the lead is released and the chuck is further advanced, the tip of the chuck is engaged with a second tightening ring located inside the tip of the shaft so that it can be retreated while holding the lead. , the shaft is rotatably connected to the front shaft 21 and the rear shaft 24, and
The rear shaft 24 is configured to be movable in the axial direction as appropriate with respect to the front shaft 21, and the cam portion 10 of the core case
A cylindrical cam 12 is provided between the rear shaft 24 and a cam portion 31 integrally provided inside the rear shaft 24, and when the rear shaft 24 is rotated in one direction with respect to the front shaft 21, the cylindrical cam is rotated by the rotation of the cam portion 31. 12, the lead case moves back and forth, the chuck engages and disengages from the first tightening ring, and the lead is fed out from the tip of the shaft, and by knocking the rear end of the shaft, the rear shaft 24 is moved relative to the front shaft 21. The cam part 31, the cylindrical cam 12, and the cam part 10 move in conjunction with each other to move the lead case back and forth to feed out the lead. When rotated, the lead case moves back and forth due to the rotation of the cylindrical cam 12, and the tip of the chuck engages with the second tightening ring and retreats, so that the lead is stored from the tip of the shaft. A sharpening pencil with a retractable lead.