Speaker-use protection element and speaker device

A loudspeaker protective unit comprising:

• a lamp having a pair of lead lines and connected in series to a loudspeaker unit for protecting said loudspeaker unit from an excessive input;
• and
• a casing provided around said lamp, said casing being formed of an electrically conductive material and exhibiting light shielding properties;
• wherein sealing is made across at least one of the lead lines of said lamp and said light shielding casing.

A loudspeaker protective unit comprising:

• a lamp connected in series with a loudspeaker unit for protecting said loudspeaker unit from an excessive input;
• and
• a light-shielding casing for housing said lamp;
• said lamp having a filament, a main lamp body unit housing said filament and a pair of lead lines to which said filament is connected;
• an inert gas being sealed in said main lamp body unit;
• said paired lead lines being arranged at a preset spacing from each other in said main lamp body unit.

A loudspeaker device comprising:

• a loudspeaker unit;
• and
• a lamp having a pair of lead lines and connected in series to said loudspeaker unit for protecting said loudspeaker unit from an excessive input;
• said lamp including alight shielding member provided therearound, for shielding the light radiated from said lamp.

A loudspeaker device comprising:

• a loudspeaker unit;
• and
• a lamp including a pair of lead lines, said lamp being connected in series with said loudspeaker unit for protecting said loudspeaker unit against excessive input;
• said lamp including a casing provided therearound, said light-shielding casing being formed of an electrically conductive material and exhibiting light-shielding properties;
• at least one of said paired lead lines of said lamp and said light-shielding casing being sealed from each other with a sealant.

A loudspeaker device comprising:

• a loudspeaker unit;
• and
• a lamp connected in series with said loudspeaker unit for protecting said loudspeaker unit from excessive input;
• said lamp having a filament, a main lamp body unit housing said filament, and a pair of lead lines to which said filament is connected;
• and
• a light-shielding casing provided around said lamp for shielding the light radiated from said lamp;
• an inert gas being sealed in said main lamp body unit and said pair of lines being arranged at a preset spacing from each other in said main lamp body unit.