Electronic clinical thermometer
An electronic thermometer contains inside its main body not only a temperature detecting device and a display device for displaying the measured body temperature but also a buzzer for outputting a warning sound. The buzzer is formed with a piezoelectric plate on an oscillating plate, having an elongated shape and being securely supported only at mutually opposite end parts in its longitudinal direction, and these end parts remain fixed in the primary mode of oscillation. A resonance chamber is formed between the buzzer and its support structure. A buzzer cover, which serves to secure the buzzer by contacting it only at its end parts, also contacts the main body in a direction opposite from the support structure so as to propagate the buzzer oscillations to the main body.
1. An electronic thermometer comprising:
a main body including a temperature detecting part;
means for detecting and displaying temperature of said temperature detecting part;
a buzzer that is elongated in a longitudinal direction, having a pair of mutually opposite end parts in said longitudinal direction;
a support structure contained inside said main body, said support structure securely supporting said buzzer only at said end parts of said buzzer; and
a buzzer-securing member for securing said buzzer, said buzzer-securing member having contact parts that contact said buzzer only at said end parts in a direction opposite said support structure.
2. The electronic thermometer of claim 1 wherein said buzzer-securing member contacts also said main body.
3. The electronic thermometer of claim 1 wherein said end parts of said buzzer are arcuately shaped.
4. The electronic thermometer of claim 3 wherein said buzzer-securing member contacts also said main body.
5. The electronic thermometer of claim 1 wherein said support structure contains a control circuit including a driving circuit for said buzzer.
6. The electronic thermometer of claim 5 wherein said buzzer-securing member contacts also said main body.
7. The electronic thermometer of claim 1 wherein said support structure has support members which contact said buzzer only at said end parts.
8. The electronic thermometer of claim 7 wherein said buzzer-securing member contacts also said main body.
9. The electronic thermometer of claim 7 wherein said support structure has a sound chamber with side surfaces and a bottom surface, said bottom surface being opposite said buzzer and having a sound-conducting opening, said support members being along said side surfaces.
10. The electronic thermometer of claim 9 wherein said buzzer-securing member contacts also said main body.
11. An electronic thermometer comprising:
a main body including a temperature detecting part;
means for detecting and displaying temperature of said temperature detecting part;
a buzzer that is elongated in a longitudinal direction, having a pair of mutually opposite end parts in said longitudinal direction;
a support structure contained inside said main body, said support structure having support members which contact said buzzer from below only at said end parts and securely supporting said buzzer only at said end parts of said buzzer; and
a buzzer-securing member for securing said buzzer from above, said buzzer-securing member having contact parts that contact said buzzer only at said end parts in a direction opposite said support structure.
12. The electronic thermometer of claim 11 wherein said buzzer-securing member contacts also said main body and serves to cause vibrations of said buzzer to propagate therethrough and through said main body.
13. The electronic thermometer of claim 11 wherein said end parts of said buzzer are arcuately shaped and said support structure has a sound chamber with side surfaces and a bottom surface, said bottom surface being opposite said buzzer and having a sound-conducting opening, said support members being along said side surfaces.
14. The electronic thermometer of claim 13 wherein said buzzer-securing member contacts also said main body above said buzzer and serves to cause vibrations of said buzzer to propagate therethrough and through said main body and to increase sound pressure inside said sound chamber.