JPH02135285U

JPH02135285U -

Info

Publication number: JPH02135285U
Application number: JP4302889U
Authority: JP
Priority date: 1989-04-14
Filing date: 1989-04-14
Publication date: 1990-11-09

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
と一体のカム部等の関係を示した説明図で、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、１２……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、２０
，２１……壁、２２……凸部、２３……リブ、２
４……後軸、２５……凹部、２６……カム部、２
７……先端テーパー部、３０……クリツプ、３１
……消ゴム止め具、３２……消ゴム、３３……カ
バー。 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. 6 to 8 are explanatory diagrams showing the relationships among the cam portion of the core case, the cylindrical cam loosely fitted into the core case, the cam portion integrated with the rear shaft, etc.
The figure shows a state corresponding to FIG. 3, FIG. 7 to FIG. 4, and FIG. 8 to FIG. 5, respectively. 1...chuck, 2...first tightening ring, 3
...Second tightening ring, 4...Pushing spring, 5...Base, 6...Retaining chuck, 7...Shaft coupling, 8...
Chuck spring, 9... Core case, 10...
Cam portion, 11... Groove, 12... Cylindrical cam, 13...
...Step part, 14, 15...Cam slope, 16...Step part, 17, 18...Cam slope, 19...Step part, 20
, 21...Wall, 22...Protrusion, 23...Rib, 2
4... Rear shaft, 25... Recessed portion, 26... Cam portion, 2
7... Tip tapered part, 30... Clip, 31
...Eraser stopper, 32...Eraser, 33...Cover.

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. When the shaft is rotatably connected to the front shaft and the rear shaft, and a cam portion is formed between the core case and the rear shaft, and the rear shaft is rotated in one direction with respect to the front shaft, When the chuck disengages from the first tightening ring and lets out the lead from the tip of the shaft, and rotates the rear shaft in the other direction relative to the front shaft, the tip of the chuck engages the second tightening ring and retreats. This is a retractable lead sharpener pencil that features a retractable lead that is stored from the tip.