CN2338811Y

CN2338811Y - Non-push-button electronic door bell

Info

Publication number: CN2338811Y
Application number: CN 97223305
Authority: CN
Inventors: 金振国
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-05-26
Filing date: 1997-05-26
Publication date: 1999-09-15
Anticipated expiration: 2007-05-26

Abstract

The utility model relates to a non-push-button electronic door bell which comprises an outer shell, an electronic circuit and a loudspeaker. The non-push-button electronic door bell is inlaid in a door from the inside plate opening of the door, and a sound sensor on the non-push-button electronic door bell is abutted or adjacent to the outside plate of the door. When visitors knock at the door, the sound sensor picks up door knocking sound signals and sends the door knocking sound signals to an amplifying circuit. After being amplified by the amplifying circuit and shaped by a pulse shaping circuit, the sound signals trigger a music integrated circuit to sound for a period and report to the hosts that the visitors arrive. The utility model has convenient operation and simple structure, and avoids the destruction or demolishment of human attempt.

Description

No button electronic door bell

The utility model relates to a kind of doorbell that transmits voice signal, does not particularly have the electronic door bell of button.

At present, known electronic door bell is connected to form by circuit, loudspeaker and button, and circuit and loudspeaker place shell, and button is contained on the outer panel of door, and it had both installed inconvenience, influences the attractive in appearance of door, is removed easily again or destroys.

The purpose of this utility model provides a kind of no button doorbell, has avoided artificial destruction effectively, has overcome the factor of seeking the button inconvenience night.

The purpose of this utility model is to realize like this, it includes shell, electronic circuit, loudspeaker, it is characterized in that electronic circuit is by sound transducer, amplifying circuit, pulse shaping circuit, music integrated circuit, power amplifier connects to form, cased, interior plate opening from door is bumped in the door again, sound transducer on it is with side plate is inconsistent or close outdoors, sound transducer picks up the tap-tap tone signal, after sending into the amplifying circuit amplification, shaping through pulse shaping circuit, trigger music integrated circuit and do the one-period pronunciation, reach the purpose of utility model.

Owing to adopt such scheme, utilize sound control circuit, by tap-tap, can trigger the electronic door bell sounding, this product is easy, easy to use by dressing, and difficult quilt is demolished or destroyed, and is simple in structure.

Below in conjunction with drawings and Examples the utility model is further specified:

Accompanying drawing is the instructions circuit theory diagrams

In the accompanying drawings sound transducer with by triode V ₁V ₂, resistance R ₁R ₂R ₃R ₄R ₅, capacitor C ₁C ₂Linking the amplifying circuit of forming mutually is connected; By integrated package D ₂, capacitor C ₃C ₄, resistance R ₇R ₈R _B, diode D ₁Link mutually and form pulse shaping circuit, by triode V ₂Be connected with amplifying circuit, pulse shaping circuit is connected with the input end of music integrated circuit, music integrated circuit output termination V ₃, V ₄The power amplifier of forming.

The utility model using method: when energized has the guest to knock at the door, the sound of knocking at the door by the sound transducer pickup after, through capacitor C ₂Be coupled to triode V ₁Be coupled to V after the amplification ₂, V ₂The sound signal amplification is outputed to integrated package D ₂Shaping, signal is through C after the shaping ₃, R ₇The differentiating circuit and the R that form ₈, C ₄After the integrating circuit of forming is handled, trigger music integrated circuit Ic once more after the shaping, Ic output doorbell signal passes through V ₃, V ₄Amplify the driving loudspeaker and send doorbell sound, report owner guest and arrive.

Shell of the present utility model is a plastics system, and its enforcement relates to plastic processing and circuit assembling, with reference to instructions and accompanying drawing, processes assembling by the known technology of plastic processing and electronic devices and components welding assembly and gets final product.

Claims

1, no button electronic door bell, it includes shell, electronic circuit, loudspeaker, it is characterized in that: electronic circuit is connected to form by sound transducer, amplifying circuit, pulse shaping circuit, music integrated circuit, power amplifier, cased, interior plate opening from door is bumped in the door again, and the sound transducer on it is with side plate is inconsistent or close outdoors.

2, according to the described electronic door bell of claim 1, it is characterized in that: sound transducer with by triode V ₁V ₂, resistance R ₁R ₂R ₃R ₄R ₅, capacitor C ₁C ₂Linking the amplifying circuit of forming mutually is connected; By integrated package D ₂, capacitor C ₃C ₄, resistance R ₇R ₈R _B, diode D ₁Link mutually and form pulse shaping circuit, by triode V ₂Be connected with amplifying circuit, pulse shaping circuit is connected with the input end of music integrated circuit, music integrated circuit output termination V ₃, V ₄The power amplifier of forming.