Cutlery – Static pencil sharpener – Having conical or cylindrical work guide
Reexamination Certificate
1999-06-14
2001-06-26
Payer, Hwei-Slu (Department: 3724)
Cutlery
Static pencil sharpener
Having conical or cylindrical work guide
C030S457000, C144S028500
Reexamination Certificate
active
06249981
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention relates to an improved structure of a pencil sharpener, and in particular, to a pencil sharpener which has pencil sharpening function and has new function of light emitting and music producing.
(b) Description of the Prior Art
ROC patent publication no. 187347 entitled “A Pencil Sharpener With Music And Light Indiction Effect” discloses a pencil sharpener comprising a main body having an aperture for the insertion of a pencil, one lateral edge of the aperture being provided with a blade and being connected to an IC musical disc, a buzzer and a light bulb, and the other lateral edge of the aperture being located near to the center of the pencil tip, a conductive spring disc being connected to the IC musical disc, and the light bulb.
After a pencil has been sharpened, the tip of the pencil causes the blade and the conductive spring disc to electrically connect to a power source, which forms a closed circuit to produce a sound and light effect to indicate that the pencil has already been sharpened.
The conventional pencil sharpener structure employs the pencil tip to simultaneously touch the blade and the conductive spring to produce a closed circuit so that electrical current will pass through the pencil tip from the blade to the conductive blade. However, the following drawbacks are found in this conventional art;
1) Friction is formed when the conductive spring and the pencil tip are in contact. The pencil tip will be scratched and the conductive spring will be worn out after a long period of use.
2) Although the pencil tip is conductive, its conductivity is not as good as metallic materials. In other words, the conductivity of the pencil tip is poor.
3) Music is only played after the pencil has been sharpened, therefore, the process of sharpening is dull without music.
SUMMARY OF THE PRESENT INVENTION
Therefore, it is an object of the present invention to provide an improved structure of a sharpener comprising an ornamental seat, a light-emitting body, a fixing seat module containing a plurality of batteries, a conductive spring, a conductive cap, a push rod, a main body containing a sharpening means, a bottom cap, characterized in that a conic-shaped sharpening aperture is provided to the sharpening means, the top end of the sharpening means has a push rod, and a push button is formed at the front end of the push rod, the push button passes through a hole at the top end of the sharpening means into the sharpening aperture, a protruded block is mounted at the top center of the push rod and is engageable with the conductive cap having urged by a spring at one end, the other end of the spring surrounds the fixing seat having the light-emitting body mounted on the top thereof, a straight leg of the light-emitting body is insertable into the fixing seat and is connected to the negative terminal of the batteries, the other leg is bent so as to be mounted at the exterior of the fixing seat and is in contact with the top end of the spring, thereby, a pencil inserted into the sharpening aperture urges the push rod to move upward together with the conductive cap, which in turn, causes the conductive cap to touch the positive terminal of the batteries within the fixing seat, thus electric current passes through the conductive cap, the spring, and to the bent leg of the light-emitting body so as to produce light.
Another aspect of the present invention is to provide an improved structure of a sharpener comprising an ornamental seat, a light-emitting body, a circuit board module, a spring, a push rod, a main body containing a sharpening means, a bottom cap, characterized in that a conic-shaped sharpening aperture is provided to the sharpening means, the top end of the sharpening means has a push rod and a push button is formed at the front end of the push rod, the push button passes through a hole at the top end of the sharpening means into the sharpening aperture, a protruded recess is formed at the top of the push rod, the circuit board module consists of a circuit board, a plurality of batteries at the bottom face of the circuit board, a musical disc on the protruded slot of the push rod, a multi-pore sound mask to protect the musical disc, and the spring in between the circuit board and the push rod, thereby, pencil inserted into the sharpening slot urges the push button to move upward together with the musical disc and the sound mask so that the conductive switch at the bottom of the circuit board is in contact with the top end of the sound mask to produce sound and light.
Other objects and advantages of the present invention will become apparent and obvious from a study of the following description and the accompanying drawings which are merely illustrative of such invention.
REFERENCES:
patent: 3556182 (1971-01-01), Tanigami
patent: 3678975 (1972-07-01), Imanishi et al.
patent: 3746061 (1973-07-01), Nakazaki
patent: 5052453 (1991-10-01), Chen
patent: 5161587 (1992-11-01), Wu
A & J
Payer Hwei-Slu
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