JPS5940991Y2 - electric knife sharpener - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sharpener for cutlery such as kitchen knives, and has a simple structure that allows both sides of the grindstone to be pressed against the cutlery.

In conventional knife sharpeners, the grindstone is connected directly to the motor shaft.
The means for pressing the grindstone against the cutter was constructed by directly pressing the motor shaft in the axial direction with a spring plate.

In such a configuration, the motor shaft cannot be moved largely in the axial direction due to the structure of the motor.

Since the compression is unidirectional, only one side of the whetstone comes into pressure contact with the cutter, and there is a drawback that both sides of the whetstone cannot be used effectively.

Furthermore, attaching the grindstone directly to the motor shaft has problems such as the fact that it is structurally difficult to protect the motor from dust, waterproofing, etc., and cannot be manufactured easily.

The present invention takes into consideration the above-mentioned drawbacks, and combines the motor shaft and the rotating shaft to which the grinding wheel is fixed with a coil spring, transmits rotation by the coil spring, and utilizes the axial elasticity of the coil spring. It is an object of the present invention to provide an electric knife sharpener which is configured so that both sides of the whetstone are brought into pressure contact with the cutter, and which can perform good grinding.

The present invention will be described below with reference to drawings showing one embodiment.

In the figure, 1 is the base, 2 is the outer casing, and the base 1
and the outer casing 2 constitute a case.

3 is a motor mounted on the base 1, and the motor shaft 4 is provided horizontally.

Reference numeral 5 designates a disc-shaped grindstone, the rotating shaft 6 of which is disposed on the axis of the motor shaft 4, held horizontally by a bearing I, and movable in the axial direction.

A coil spring 8 has both ends connected to one end of the motor shaft 4 and one end of the rotating shaft 6, respectively.

Reference numerals 9 and 9' designate V-groove-shaped blade guides provided at the upper part of the outer casing 2 and located on both sides of the grindstone 50.

Note that both side surfaces of the grindstone 50 protrude from the inner side of the blade guide portions 9 and 9', respectively, and the vertical center line A-A' of the grindstone 5 is aligned with the blade guide portions 9 and 9'. It is located in the center between.

The electric knife sharpener of the present invention configured as described above rotates the rotating shaft 6 via the coil spring 8 by driving the motor 3, thereby rotating the grindstone 5.

When a knife (not shown) is guided to one of the knife guides 9,
The surface of the cutter presses the left side of the whetstone 5 in the figure, and the whetstone 5 moves to the right, but the elastic force of the stretched coil spring 8 acts on the contact surface between the cutter and the whetstone 5 to restore its original shape. , the required pressure contact is obtained and good grinding is performed.

When the cutter is guided to the other cutter guide 9', the surface of the cutter presses the right side of the whetstone 5 in the figure, and the contact surface of the cutter and the whetstone 50 is affected by the elasticity of the compressed coil spring 8, which is trying to restore its original shape. A force is applied, and as in the case described above, the required pressure contact is obtained and good grinding is performed.

As described above, the electric knife sharpener of the present invention uses the axial elasticity of one coil spring that connects the motor shaft and the whetstone rotating shaft to press the cutter against both sides of the whetstone. Not only can it perform good grinding, but it can also absorb any misalignment of the center of the whetstone in the tool guide, and since both sides of the whetstone are used, the life of the whetstone is long and can be used effectively.

Since the small motor shaft and the whetstone rotating shaft are separate, the motor part can be made dustproof and waterproof with a simple structure, which has a great practical effect.

[Brief explanation of drawings]

The drawing is a sectional view of an electric knife sharpener according to an embodiment of the present invention. 1...Base, 2...Outer casing, 3...
...Motor, 4...Motor shaft, 5...
・Whetstone, 6...Rotating shaft, 8...Coil spring, 9, 9'...Cutter guide.

Claims (1)

[Scope of utility model registration request] A rotating shaft to which a grindstone is fixed and a motor shaft are arranged on substantially the same axis, and both ends of a coil spring are connected to the rotating shaft and the motor shaft, so that the rotating shaft is movable in the axial direction, and the coil spring is movable in the axial direction. An electric knife sharpener configured so that the elasticity of the material acts on the grindstone as pressure force against the knife.