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Knife sharpener

a technology of electric power and blade, which is applied in the direction of edge grinding machines, other manufacturing equipment/tools, manufacturing tools, etc., can solve the problems of inability to adjust the pressure of the blade, damage to the blade, and electric power only providing the rotation of the grinding wheel

Inactive Publication Date: 2012-01-19
LI SHENG CHENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is an electric sharpener with two sharpening units that work with different spring units to provide proper spring forces. The two spring units have different elasticity coefficients to create different axial pressures on the two sharpening units. Each sharpening unit has a positioning ring to ensure stable sharpening action. The technical effects of the invention include precise sharpening, stable sharpening action, and improved user experience.

Problems solved by technology

If the speed is adjusted to a high speed, the users have to have certain skill otherwise the knife may be damaged.
The electric power only provides the rotation of the grinding wheels and cannot adjust the pressure that the blade is pressed on the grinding wheels.
This restricts the result of sharpening because most of the users do not have the skill to properly operate the knife relative to the grinding wheels.

Method used

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Examples

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Embodiment Construction

[0015]Referring to FIGS. 1 to 3, the electric sharpener 10 of the present invention comprises a body 10 which includes a reception area 11 and a sharpening area 12 which is located beside the reception area 11. A driving device 20 is located in the reception area 11 and includes an output shaft which is connected with a first gear of a gear set 30 located in the sharpening area 12. A second gear is engaged with the first gear and connected to a shaft 40 which is located in the sharpening area 12. A rough sharpening set 50 is connected to the shaft 40 and located beside the gear set 30. The rough sharpening set 50 has a first spring unit 51. A fine sharpening set 60 is connected to the shaft 40 and located beside the rough sharpening set 50. In other words, the rough sharpening set 50 is located between the fine sharpening set 60 and the gear set 30. The fine sharpening set 60 has a second spring unit 61. The first and second spring sets 51, 61 have different spring forces applied to...

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Abstract

An electric sharpener includes a body having a reception area for receiving a driving device, and a sharpening area in which a gear set is located which is connected with the driving device. A shaft is located in the sharpening area and connected to the gear set. A rough sharpening set connected to the shaft and has a first spring unit. A fine sharpening set is connected to the shaft and has a second spring unit. The first and second spring sets have different spring forces applied to the rough sharpening set and the fine sharpening set.

Description

FIELD OF THE INVENTION[0001]The present invention relates to an electric sharpener, and more particularly, to an electric sharpener having two sets of girding disks with different spring units.BACKGROUND OF THE INVENTION[0002]A conventional electric sharpener is used to sharpen knives or scissors and generally includes a grinding wheel which is driven by a motor and the users press the blade of the knife on the rotating grinding wheel to sharpen it. Some of the conventional sharpeners have two grinding wheels for different purposes of sharpening, such as rough sharpening and fine sharpening. The two sharpening wheels are connected to the same shaft so that they are rotated at the same speed, however, the requirements for the two different types of sharpening are not the same. The usual way is to reduce the speed of the motor to have a compromise. If the speed is adjusted to a high speed, the users have to have certain skill otherwise the knife may be damaged. The electric power only...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B24B3/54
CPCB24B3/54
Inventor LI, SHENG-CHENG
Owner LI SHENG CHENG