Piezoelectric transformer device and housing for piezoelectric transformer and method of manufacturing them

A housing for receiving a piezoelectric transformer having upper and lower surfaces and side surfaces connecting the upper and lower surfaces, and having a voltage input portion and a voltage output portion at side surfaces thereof, both of which include a plurality of electrodes, comprising:

• a first housing part surrounding one of the side surfaces of the piezoelectric transformer on which the electrodes are formed, and having I) at least two first openings formed thereon which are positioned at locations corresponding to the electrodes of the piezoelectric transformer, and II) at least two first lead frames made of conductive elastic material, each of which is extended from a side surface into the inside of the first opening of the upper housing part and is protruded at the extended end to be in contact with at least one electrode of the piezoelectric transformer;
• a second housing part surrounding the other of the side surfaces of the piezoelectric transformer on which the electrodes are formed, and having i) at least two second openings formed thereon which are positioned at locations corresponding to the electrodes of the piezoelectric transformer, and ii) at least two second lead frames made of conductive elastic material, each of which is extended from a side surface into the inside of the second opening of the lower housing part and is protruded at the extended end to be in contact with at least one electrode of the piezoelectric transformer;
• and
• a clip fitted on the center portion of the first housing part and the center portion of the second housing part to couple the first and second housing parts to each other.

A method of manufacturing a housing for receiving a piezoelectric transformer having a voltage input portion and a voltage output portion, comprising the steps of:

• preparing a pair of lead frames comprised of rectangular ring-shaped frames, each of which is cut away at one side, the cut ends of the lead frames being protruded laterally to come into contact with input and output contact points of the piezoelectric transformer;
• providing a pair of housing parts, for receiving the piezoelectric transformer, on the cut ends of the lead frames by carrying out an injection molding on the cut ends of the lead frames and forming openings at the housing parts such that the cut ends of the lead frames are protruded therethrough to resiliently support the piezoelectric transformer;
• removing lead frames outwardly extended from the pair of housing parts except lead end portions of the lead frames;
• and
• bending the lead ends toward a surface of the housing parts to contact the surface, thereby allowing the housing parts to be mounted on a PCB.

A piezoelectric transformer device comprising:

• a piezoelectric transformer having rectangular upper and lower surfaces and side surfaces connecting the upper and lower surfaces, and having an input portion formed at upper and lower surfaces of one half part of two half parts of the piezoelectric transformer which are longitudinally and equally divided and an output portion formed at parts of side surfaces and an upper surface adjacent to the side surfaces of the other half part of the piezoelectric transformer;
• an upper housing part surrounding the upper surface and the side surfaces of the piezoelectric transformer, and having I) at least two first openings formed thereon to expose parts of the input and output portions, and II) at least two first lead frames made of conductive elastic material, each of which is extended from one of the side surfaces into the inside of the first opening of the upper housing part and is protruded at the extended end to be in contact with the input and output portions of the piezoelectric transformer;
• and
• a lower housing part surrounding the lower surface and the side surfaces of the piezoelectric transformer, and having i) at least two second openings formed thereon to expose parts of the input portion and the piezoelectric transformer, and ii) at least two second lead frames made of conductive elastic material, each of which is extended from one of the side surfaces into the inside of the second opening of the lower housing part and is protruded at the extended end to be in contact with a portion adjacent to the output portion of the piezoelectric transformer.

A piezoelectric transformer device comprising:

• a piezoelectric transformer having rectangular upper and lower surfaces and side surfaces connecting the upper and lower surfaces, and having an input portion formed at upper and lower surfaces and side surfaces of a middle portion of the piezoelectric transformer and an output portion formed at upper and lower surfaces and side surfaces of one end of the piezoelectric transformer;
• an upper housing part surrounding the upper surface and the side surfaces of the piezoelectric transformer, and having I) at least two first openings formed thereon to expose parts of the input and output portions, and II) at least two first lead frames made of conductive elastic material, each of which is extended from one of the side surfaces into the inside of the first opening of the upper housing part and is protruded at the extended end to be in contact with the input and output portions of the piezoelectric transformer;
• and
• a lower housing part surrounding the lower surface and the side surfaces of the piezoelectric transformer, and having i) at least two second openings formed thereon to expose parts of the input portion and the piezoelectric transformer, and ii) at least two second lead frames made of conductive elastic material, each of which is extended from one of the side surfaces into the inside of the second opening of the lower housing part and is protruded at the extended end to be in contact with the input and output portions of the piezoelectric transformer.

A piezoelectric transformer device comprising:

• a piezoelectric transformer having rectangular upper and lower surfaces and side surfaces connecting the upper and lower surfaces, and having an input portion formed at both side surfaces of a middle portion of the piezoelectric transformer and an output portion formed at both side surfaces of one end of the piezoelectric transformer;
• a first housing part surrounding one side surface of the both side surfaces on which the input and output portions are formed and both end surfaces adjacent to the side surface, and having I) at least two first openings formed thereon to expose parts of the input and output portions, and II) at least two first lead frames made of conductive elastic material, each of which is extended from a side surface into the inside of the first opening of the first housing part and is protruded at the extended end to be in contact with the input and output portions the piezoelectric transformer;
• a second housing part surrounding the other side surface of the both side surfaces on which the electrodes are formed and both end surfaces adjacent to the side surface, and having i) at least two second openings formed thereon to expose parts of the input and output portions, and ii) second lead frames made of conductive elastic material, each of which is extended from a side surface into the inside of the second opening of the lower housing part and is protruded at the extended end to be in contact with the input and output portions of the piezoelectric transformer;
• and
• a clip fitted on the center portion of the first housing part and the center portion of the second housing part to couple the first and second housing parts to each other.