Vibration type electromagnetic generator

Patent metadata

Field	Value
Publication number	US-9257891-B2
Application number	US-201013521789-A
Country	US
Kind code	B2
Filing date	Aug 27, 2010
Priority date	Jan 14, 2010
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

A vibration type electromagnetic generator is formed by a nonmagnetic material and includes a hollow first pipe whose both end portions are closed, a magneto coil which is wound around the periphery of the first pipe and which is provided with solenoid coils, and a movable magnet which is arranged inside the first pipe and which is movable along a winding axis direction of a magneto coil. Then, the movable magnet includes a plurality of magnets and a magnet fixing unit composed of a nonmagnetic body for fixing the plurality of magnets whose same magnetic poles are facing one another, and among the plurality of solenoid coils, the coil length of one or more solenoid coils are made to be length equal to or greater than the magnet length of the magnet.

First claim

The invention claimed is:

1. A vibration type electromagnetic generator comprising:
a hollow first pipe formed by a nonmagnetic material, wherein both end portions of the hollow first pipe are closed;
a magneto coil wound around the periphery of the first pipe and provided with at least one solenoid coil; and
a movable magnet arranged inside the first pipe and movable along the winding axis direction of the magneto coil, wherein
the movable magnet comprises:
a plurality of magnets; and
a magnet fixing unit composed of a nonmagnetic body for fixing the plurality of magnets such that same magnetic poles of the plurality of magnets are facing, and
magnets at ends of the plurality of magnets have a length smaller than that of a magnet not located at the ends; and
lengths of the magnets at the ends of the plurality of magnets are between 0.70 times or more and 0.95 times or less lengths of the magnet not located at the ends.

2. The vibration type electromagnetic generator according to claim 1 , wherein the coil length of the solenoid coil is made to be a length between 1.05 times or more and 1.50 times or less with respect to the magnet length of the magnet.

3. The vibration type electromagnetic generator according to claim 1 , wherein the magnet lengths of the magnets arranged at both end portions of the magnet fixing unit are made to be lengths between 0.70 times or more and 0.95 times or less the coil length of the solenoid coil.

4. The vibration type electromagnetic generator according to claim 1 , wherein the magnet fixing unit is a hollow second pipe and the plurality of magnets are sealed inside the second pipe.

Assignees

• Kawarai Mitsugu
• Sumida Corp

Inventors

• Kawarai Mitsugu

Classifications

• H02K35/02 Primary

  with moving magnets and stationary coil systems · CPC title