JP2008284532A - Bimorph vibrator for piezo-electric sheet power generation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small thin vibrator, which is appropriate for driving a piezo-electric ceramic sheet for power generation and can be used for a long time. <P>SOLUTION: The vibrator is produced by providing two pairs of piezo-electric ceramic layers (a pair of the layers 2 and 3 and the same of 4 and 5) that have the same shape and the same mass on the upper and lower surfaces on the left and the right of a reed-shaped spring metal plate 1 to form bimorphs and providing a hard plastic upper-face-pushing convex part 6 and a hard plastic lower-face-pushing convex part 7 on the upper and the lower surfaces of the central part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus for driving a piezoelectric ceramic sheet for power generation.

  To date, there has been no transducer suitable for driving a piezoelectric ceramic sheet for power generation.

Industrial application fields

Problems to be solved by the invention

  An object of the present invention is to develop a vibrator for power generation that is small and thin and can withstand long-time use.

Means for solving the problem

  In order to achieve the above object, in the power generation means of the present invention, a thin and small power generating vibrator using a strip-shaped bimorph piezoelectric ceramic with good electric energy efficiency has been developed.

  A rectangular bimorph piezoelectric ceramic sandwiched between spring-made metal plates, such as phosphor bronze plates, can be easily bent and deformed with low power. Can be made.

  FIG. 1 is a schematic diagram schematically showing the present invention, in which 1 is a strip-shaped spring metal plate, 2 is a left upper surface piezoelectric ceramic layer, 3 is a left lower surface piezoelectric ceramic layer, 4 is a right upper surface piezoelectric ceramic layer, 5 Is a lower surface piezoelectric ceramic layer, 6 is an upper surface pressing pressure convex portion, 7 is a lower surface pressing pressure convex portion, 8 is a strip-shaped spring metal plate, 9 is a left upper surface piezoelectric ceramic layer, 10 is a left lower surface piezoelectric ceramic layer, and 11 is A right upper surface piezoelectric ceramic layer, 12 is a lower right surface piezoelectric ceramic layer, and 13 is an upper surface pressing pressure convex portion.

  FIG. 2 is a schematic bird's-eye view of the present invention.

  FIG. 3 is a schematic view showing an embodiment of the present invention, 14 is a piezoelectric sheet power generation bimorph vibrator of the present invention, and 15 is a power generation thin film piezoelectric ceramic laminated module.

The invention's effect

  Since the present invention is configured as described above, the following effects can be obtained.

  As shown in the figure, the bimorph vibrator 14 for piezoelectric sheet power generation has two pairs of piezoelectric ceramic layers 2, 3, 4, and 5 having the same shape and the same mass on the left and right upper and lower surfaces of the strip-shaped spring metal plate 1. The upper surface pressing pressure convex portion 6 and the lower surface pressing pressure convex portion 7 made of hard plastic are provided on the upper and lower surfaces of the central portion, so that if each pair of bimorph piezoelectric ceramics is energized, each piezoelectric ceramic layer Due to the deformation performance, the central part of the strip-shaped spring metal plate 1 vibrates up and down, and the upper surface pressing convex part 6 and the lower surface pressing convex part 7 provided on the upper and lower surfaces of the central part simultaneously perform vertical vibration movement. It will happen.

  Accordingly, as shown in FIG. 3, when the piezoelectric sheet power generating bimorph vibrator 14 is set at a constant interval between the stacked power generating thin film piezoelectric ceramic laminated modules 15 as shown in FIG. The oscillating motion of the piezoelectric sheet power generating bimorph vibrator 14 caused by energization forces the entire piezoelectric sheet power generating bimorph vibrator 14 to vibrate.

  As described above, the piezoelectric sheet power generation bimorph vibrator of the present invention can be used to forcibly oscillate a large number of power generation thin film piezoelectric ceramic laminated modules simultaneously.

  This tells us that the structure of the present invention has a large possibility of expanding the scale of the same structure.

The schematic diagram which showed the present invention simply. The schematic bird's-eye view of the present invention. The schematic diagram which showed the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 8 Strip-shaped spring metal plate 2, 9 Left upper surface piezoelectric ceramic layer 3, 10 Left lower surface piezoelectric ceramic layer 4, 11 Right upper surface piezoelectric ceramic layer 5, 12 Right lower surface piezoelectric ceramic layer 6, 13 Upper surface pressing pressure convex part 7 Lower pressure pressing convex portion 14 Bimorph vibrator for piezoelectric sheet power generation 15 Thin film piezoelectric ceramic laminated module for power generation

Claims (2)

  Two pairs of piezoelectric ceramic layers 2, 3, 4, and 5 having the same shape and the same mass are formed on the upper and lower surfaces of the left and right sides of the strip-shaped spring metal plate 1 in a bimorph shape. A piezoelectric sheet power generation bimorph vibrator 14 provided with an upper surface pressing pressure convex portion 6 and a lower surface pressing pressure convex portion 7.   A piezoelectric power generation apparatus using the piezoelectric sheet power generation bimorph vibrator 14.

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