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Mail alarm of mail box

A technology of annunciator and mail, which is applied to household components, other household appliances, household appliances, etc., can solve problems such as inconvenience and achieve the effect of convenient management

Inactive Publication Date: 2010-06-30
张海艇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of reporting device that can know in time whether there is mail in the mailbox at home, to overcome the inconvenience that existing mailboxes bring to people because of no reporting device

Method used

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  • Mail alarm of mail box
  • Mail alarm of mail box
  • Mail alarm of mail box

Examples

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Embodiment Construction

[0008] refer to figure 1 and figure 2 The specific embodiment of the present invention will be described in detail: a kind of letterbox mail alarm includes an infrared ray emitting circuit 1, an integrated infrared ray sensor 28, an infrared ray receiving circuit 2, an alarm circuit 3, and an infrared ray emitting circuit 1 contains a 555 Integrated chip 7, described 555 integrated chip 7 forms an oscillating circuit with two resistances 4,5 and a capacitor 6, and integrated chip 7 is also connected with a decoupling capacitor 9, and its output end passes through the connection between resistor 8 and infrared emission tube 10 The positive pole is connected, and a square wave with a frequency of about 20Kz is output to drive the infrared emitting tube 10 to emit infrared rays, and the negative electrode grounding wire of the infrared ray 10. The integrated infrared sensor 28 contains an infrared emitting tube 10, an infrared receiving tube 15, and a plastic Part 30, the infra...

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PUM

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Abstract

The invention relates to a mail alarm of a mail box, which comprises an infrared transmitting circuit, an integral infrared sensor, an infrared receiving circuit and an alarm circuit. When no mail is put into a mail box, an infrared receiving tube can not receive infrared light, a computing amplifier does not have signal output, a triode is cut off and an active buzzer does not have a sound; when a mail is put into the mail box and passes through the integral infrared sensor, the infrared receiving tube receives the infrared light, the computing amplifier has signal output, the triode is conducted and the active buzzer makes a sound, and later, the mail falls on the bottom of the mail box, the infrared receiving tube can not receive the infrared light and the computing amplifier does not have the signal output, but at the moment, the triode is kept to be conducted due to the action of a phase inverter, and the buzzer is continue to make the sound; a normally closed switch is pressed and then the triode is cut off, thereby relieving the alarm of sound of the active buzzer.

Description

Technical field [0001] The invention relates to an annunciator, in particular to an annunciator for a mailbox. Background technique [0002] At present, each building resident has a mailbox to receive mail, and it is necessary to open the mailbox to know whether there is mail in the mailbox, which brings a lot of inconvenience to people, especially the residents living upstairs sometimes have to repeatedly download the mail to get the mail. It is even more inconvenient for Lou to open the mailbox several times to confirm whether there is an email. Contents of the invention [0003] The purpose of the present invention is to provide a kind of notification device that can know in time whether there is mail in the mailbox at home, to overcome the inconvenience that existing mailboxes bring to people because there is no notification device. [0004] In order to achieve the above-mentioned purpose, the technical solution adopted in the present invention is: a mailbox mail repo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A47G29/122
Inventor 张海艇
Owner 张海艇