Signalizing device for domestic electric appliance

Abstract

The invention provides a household appliance alarming device which can definitely identify the alarming content of a buzzer and prevent signal sounds from hurting ears and is provided with a buzzer which carries out stated alarming action and an alarming controlling device. When the buzzer acts, the controlling device causes the voltage which is administered to the buzzer to change within set time according to predetermined models, thus leading the sound pressure electrical level of signal sounds to change with time and realizing the diversity of alarming content.

Description

technical field [0001] The present invention relates to an alarm device for a home appliance equipped with a buzzer for performing a predetermined alarm action related to operation content or action content. Background technique [0002] In the past, in household appliances such as microwave ovens, rice cookers, and washing machines, the beep sound of piezoelectric buzzers was mainly used to notify the input operation content or the completion of the operation. Specifically, for example, in a microwave oven with an open grill function, there is a self-excited piezoelectric buzzer that rings at a vibration frequency of 2KHz in the state of voltage application, and corresponds to the operation or action state of the microwave oven. , to make the above-mentioned piezoelectric buzzer operate (turn on), as an example, the operation is as follows ("off" is the period of operation stop). [0003] Key input confirmation... 0.15 seconds each time it is connected; [0004] Cooking e...

AI Technical Summary

Problems solved by technology

Therefore, as in the past, in the state where the signal sound emitted by the piezoelectric buzzer maintains a constant sound pressure level and is a continuous sound, when the user confirms the above-mentioned signal sound, it is difficult to judge the signal sound in many cases. From which household appliance is it issued, it is very inconvenient in actual use

[0010] Moreover, in the previous structure, the content of various alarm actions is only distinguished by the number of repeated actions or the length of action time of the piezoelectric buzzer that emits a monotonous sound of a certain frequency and a certain sound pressure level. It is indeed difficult for readers to distinguish the various notification contents mentioned above. From this aspect, it is very inconvenient in actual use.

[0011] In addition, since the signal sound is a continuous sound with a certain frequency and a certain sound pressure level, and there is no element of a natural sound with no fluctuation or attenuation of the sound, it must become an artificial and dull sound.

Therefore, some people tend to find the above-mentioned signal sounds harsh, which may be the reason that hinders the sense of high quality of products such as household appliances

Images