Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
1998-02-25
2001-01-09
Dougherty, Thomas M. (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C359S366000
Reexamination Certificate
active
06172446
ABSTRACT:
TECHNICAL FILED
The present invention relates to a piezoelectric oscillator component, a structure for supporting a piezoelectric oscillator and a method of mounting a piezoelectric oscillator, and more particularly, to a piezoelectric transformer component, a structure for supporting a piezoelectric transformer and a method of mounting a piezoelectric transformer.
BACKGROUND ART
Reductions in size and power consumption are required of portable devices equipped with liquid crystal displays (hereinafter refereed to as LCD) panels such as notebook type personal computers. A cold cathode fluorescent lamp (hereinafter referred to as CFL) which is widely used as a backlight for an LCD panel requires a high voltage of not less than 1 kV to initiate lighting and a high voltage of several hundred volts while it is continuously lit. As a transformer to be used therefor, attentions have been paid to a piezoelectric transformer which is small in size and can exhibit a high efficiency, and attempts have been made to develop such transformers for putting them into practical use.
However, a conventionally proposed mounting method of the piezoelectric transformer is complicated, and a supporting structure for the piezoelectric transformer and the piezoelectric transformer component which have simple structures and which can easily be assembled have not yet been developed.
It is, therefore, a main object of the present invention to provide a piezoelectric oscillator component which has a simple structure and which can easily be assembled, a structure for supporting the piezoelectric oscillator and a method of mounting the piezoelectric oscillator.
In addition to the above object, it is another object of the present invention to provide a piezoelectric oscillator component having high impact resistance and high reliability, a structure for supporting the piezoelectric oscillator and a method of mounting the piezoelectric oscillator.
It is still another object of the present invention to provide a piezoelectric oscillator component having a small size in its widthwise direction, and a method of manufacturing the same.
DISCLOSURE OF THE INVENTION
According to the present invention, there is provided a structure for supporting a piezoelectric oscillator, characterized in that at least one electrode disposed on a surface of a piezoelectric oscillator element and at least one conductive member of a wiring substrate are electrically and mechanically connected to each other by a lead terminal or lead terminals made of a conductive elastic material, thereby electrically connecting said electrode or electrodes of said piezoelectric oscillator element and said conductive member or members of said wiring substrate by said lead terminal or terminals, and supporting said piezoelectric oscillator element by said lead terminal or terminals such that said piezoelectric oscillator element does not contact said wiring substrate.
In this way, since the electrode or electrodes on the surface of the piezoelectric oscillator element and the conductive member or members of the wiring substrate are electrically and mechanically connected to each other by the lead terminal or terminals made of conductive elastic material, the lead terminal can establish both the electrical and mechanical connections. As a result, the structure is simplified, and is easily made thinner.
In this structure for supporting a piezoelectric oscillator, preferably, said surface, which includes said at least one electrode, of said piezoelectric oscillator element is opposed to said wiring substrate, one end of said lead terminal or one ends of said lead terminals are connected to said electrode or electrodes at a predetermined connecting position or predetermined portions, the other end of said lead terminal or the other ends of said lead terminals are connected to the conductive member or members of said wiring substrate, and a buffer member or buffer members for covering said lead terminal or terminals in the vicinity of said connecting position or portions are provided.
Also in this case, since the electrode or electrodes on the surface of the piezoelectric oscillator element and the conductive member or members of the wiring substrate are connected to each other by the lead terminal or terminals made of conductive elastic material, the lead terminal can establish both the electrical and mechanical connections. As a result, the structure is simplified, and is easily made thinner. Further, because the buffer member or members for covering the lead terminal or terminals in the vicinity of the connecting position or positions are provided, it is possible to disperse stress concentration on the piezoelectric oscillator element at a portion at which an edge portion of the lead terminal contacts the piezoelectric oscillator element and as a result, a higher drop impact resistance strength can be obtained. In this case, it is preferable to use an elastic adhesive as the buffer agent, and to join the piezoelectric oscillator element and the wiring substrate together by the buffer agent at least at a position or positions corresponding to the connecting position or positions. Further, a silicone rubber is preferably used as the elastic adhesive.
Further, in the above-mentioned structure for supporting a piezoelectric oscillator, preferably, said surface, which includes said at least one electrode, of said piezoelectric oscillator element is opposed to said wiring substrate, one end of said lead terminal or one ends of said lead terminals are connected to said electrode or electrodes at a predetermined connecting position or predetermined portions, the other end of said lead terminal or the other ends of said lead terminals are connected to the conductive member or members of said wiring substrate, and a buffer member or buffer members are provided between said lead terminal or terminals and said wiring substrate at least at a position or positions corresponding to said connecting position or portions.
Also in this case, since the electrode or electrodes on the surface of the piezoelectric oscillator element and the conductive member or members of the wiring substrate are connected to each other by the lead terminal or terminals made of conductive elastic material, the lead terminal can establish both the electrical and mechanical connections. As a result, the structure is simplified, and is easily made thinner. Further, since the buffer member or members are provided between the lead terminal or terminals and the wiring substrate at a position or portions corresponding to the connecting position or positions, it is possible to buffer an impact generated between the lead terminal or terminals and the wiring substrate, and a reliable supporting structure for the piezoelectric oscillator can be obtained.
Further, an elastic adhesive is preferably used as the buffer member or members, and a silicone rubber is more preferably used as the elastic adhesive.
Still futhermore, in the above-mentioned structure for supporting a piezoelectric oscillator, preferably, said surface, which includes said at least one electrode, of said piezoelectric oscillator element is opposed to said wiring substrate, one end of said lead terminal or one ends of said lead terminals are connected to said electrode or electrodes at a predetermined connecting position or predetermined portions, the other end of said lead terminal or the other ends of said lead terminals are connected to the conductive member or members of said wiring substrate, and said piezoelectric oscillator element and said wiring substrate are joined together by a buffer member or buffer members made of an elastic adhesive at least at a position or positions corresponding to said connecting position or positions.
By thus joining the piezoelectric oscillator element and the wiring substrate together by the buffer member or members made of elastic adhesive, a reliability of supporting and fixing the piezoelectric oscillator element to the wiring substrate is enhanced. Further, since a conductive elastic material
Iwata Yasushi
Kanayama Kouichi
Takagi Shusaku
Yoshida Mitsunobu
Birch & Stewart Kolasch & Birch, LLP
Dougherty Thomas M.
Mitsui Chemicals Inc.
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