VIBRATION SWITCH AND PORTABLE MOTOR-DRIVEN DEVICE WITH IT

Title:

VIBRATION SWITCH AND PORTABLE MOTOR-DRIVEN DEVICE WITH IT

Document Type and Number:

WIPO Patent Application WO/1995/032514

Kind Code:

A1

Abstract:

A vibration switch (10) is constituted by assembling discoid electrodes (11 and 12) having aligned projecting parts (16) on their internal surfaces together at a prescribed interval and putting a spherical body (13) in the space (21) between the electrodes (11 and 12) so that the electrodes (11 and 12) can be electrically connected to each other when the switch (10) vibrates or rolls. A portable motor-driven device provided with such a switch (10) is constituted in such a manner that the switch (10) is attached to a frame (1). When a portable power tool (4) is apt to roll or tilt sideways due to an excessive load while the tool (4) is used to cut a material, the switch (10) is turned on and the power supply to the controller (6) of the tool (4) is interrupted to immediately stop a tool rotating motor (4M) or feeding motor (5M), even though the tool (4) is used at any angle.

Inventors:

FUKUDA KENJI (JP)
ASANO OSAMU (JP)

Application Number:

PCT/JP1994/002226

Publication Date:

November 30, 1995

Filing Date:

December 27, 1994

Export Citation:

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Assignee:

NITTO KOHKI CO (JP)
FUKUDA KENJI (JP)
ASANO OSAMU (JP)

International Classes:

G01H1/00; B25F5/00; B25H1/00; F16P3/00; H01H35/14; (IPC1-7): H01H35/02; B23B47/00

Foreign References:

JPS50145869A	1975-11-22
JPH04249019A	1992-09-04
JPS52117262U	1977-09-06
JPS487765U	1973-01-27
JPH0319708A	1991-01-28

Other References: