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Piezoelectric transformer and circuit module for power supply

A piezoelectric transformer and piezoelectric body technology, applied in the direction of circuits, piezoelectric/electrostrictive/magnetostrictive devices, electrical components, etc., can solve the problems of cost, poor usability, etc., to improve production efficiency, suppress cost effect

Active Publication Date: 2020-09-18
TAMURA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to eliminate the tolerance of all parts and make the thickness uniform, extremely high production technology and management system are required, and it is unrealistic to produce at such a cost
[0007] Furthermore, since the piezoelectric transformer element is exposed in a coplanar manner on both the front side and the back side of the circuit board, it is not suitable to contact any one side (for example, the back side) with another circuit board or the like for surface There is also a problem of poor usability as a product for the purpose of installation

Method used

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  • Piezoelectric transformer and circuit module for power supply
  • Piezoelectric transformer and circuit module for power supply
  • Piezoelectric transformer and circuit module for power supply

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0059] figure 1 It is an exploded perspective view showing the piezoelectric transformer 10 according to the first embodiment divided into constituent elements. The piezoelectric transformer 10 is mainly composed of a piezoelectric body 20 and a circuit board 40 , and the piezoelectric body 20 is supported by the circuit board 40 , thereby constituting a modularized piezoelectric transformer 10 .

[0060] [Piezoelectric body]

[0061] The piezoelectric body 20 is composed of a piezoelectric ceramic body (for example, PZT) in the shape of an elongated flat plate. On one outer surface (hereinafter referred to as the upper surface) of the pair of outer surfaces constituting a pair in the thickness direction of the piezoelectric body 20, a primary side electrode 22 (first input electrode) is formed from the center to one end in the longitudinal direction. , and a secondary side electrode 26 (output electrode) is formed at the other end. Further, on the upper surface of the same...

no. 2 Embodiment approach

[0114] Figure 8 It is an exploded perspective view showing the piezoelectric transformer 100 according to the second embodiment divided into main components.

[0115] The piezoelectric transformer 100 of the second embodiment has the same piezoelectric body 20 as that of the first embodiment, but the structure of the circuit board 400 here is different from that of the first embodiment (circuit board 40 ). Furthermore, the piezoelectric transformer 100 according to the second embodiment has a form as a circuit block for a power supply due to the structure of the circuit board 400 . In the following description, differences from the first embodiment will be mainly listed, and the same reference numerals will be assigned to the same items as in the first embodiment in the drawings, and overlapping descriptions will be omitted.

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PUM

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Abstract

The invention provides a piezoelectric transformer and a circuit module for a power supply. A technology capable of improving production efficiency and cutting cost is provided. The piezoelectric sensor (10) has a piezoelectric body (20) which is provided with electrodes on a pair of outer surfaces formed in a thickness direction; and a circuit substrate (40) which has a thickness larger than that of the piezoelectric body (20) and is provided with a hole (42) which can be provided with the piezoelectric body (20) in the thickness direction, and the piezoelectric body (20) being maintained on the circuit substrate (40) via conductive wires (28, 30, 32) on electrodes (22, 24, 26) formed and only fixed on the upper surface under the condition of being accommodated in the hole (42) of the circuit substrate (40).

Description

technical field [0001] The present invention relates to a piezoelectric transformer for transforming an input voltage using a piezoelectric body, and a power supply circuit module using the piezoelectric transformer. Background technique [0002] Conventionally, there is known a technique in which a housing hole of an appropriate size is formed on a circuit board to accommodate a piezoelectric transformer element therein, and a holding member is used to bridging both sides of the piezoelectric transformer element so as to arrange it in the air. In addition, in this prior art, the holding member may be made of a bridge-type ceramic body and fired, and the piezoelectric transformer element and the circuit board may be integrated. [0003] According to the prior art described above, it is not necessary to dispose the piezoelectric transformer element on the upper surface of the circuit board, and accordingly, the overall height can be reduced. In addition, if the piezoelectric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/107H01L41/047H01L41/053
Inventor 松尾泰秀中川亮桑原清范
Owner TAMURA KK