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Mailbox indicator

An indicator and letterbox technology, which is applied to other home appliances, home components, home appliances, etc., and can solve problems such as viewing mailboxes

Inactive Publication Date: 2008-10-29
张金海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention of this project can solve the problem of checking the mailbox of every household in the urban community. Once a letter arrives, it will be displayed by the red light-emitting diode outside the mailbox to inform the residents that there is a letter in the mailbox.

Method used

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  • Mailbox indicator

Examples

Experimental program
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Embodiment Construction

[0005] Before July 30th, manufacture a letterbox prototype with the same size as the actual letterbox, and at the same time test the various indicators described in the attached drawings.

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PUM

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Abstract

The invention can ensure that once the mail box of each householder in a city community receives a letter, a red luminous diode can make a display immediately outside the mail box and indicate that the mail box of the householder has the letter. The birth of a mail box display provides the convenience for immediately indicating that a letter reaches the mail box of the householder on the one hand and can improve the civilization degree of the developed city housing and especially the image of a modern international metropolis like Shanghai on the other hand. The expense of the project for each householder is not high, so the project is beneficial to the country and citizen.

Description

technical field [0001] The invention project "mailbox indicator", when a letter arrives in the resident's mailbox, the red light-emitting diode installed outside the mailbox will light up immediately, telling the user that there is a letter in the mailbox. Taking advantage of the improvement of today's electronic manufacturing process, light-emitting diodes have the characteristics of low current consumption and high luminance. Assume that there are 50 letterboxes in each group of community housing, and 20 letterboxes are illuminated at the same time, and the LED consumption current of each letterbox is 5MA (milliampere), and the working voltage is 6V, so as to ensure the normal brightness and visibility during the day, use AC 220V , converted by a transformer, and rectified to obtain a working voltage of 6V. After calculation, the actual power consumption of 20 light-emitting diodes is 14.4W per day, and it takes 69 days to consume one kWh of power, so the actual power consum...

Claims

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Application Information

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IPC IPC(8): A47G29/122
Inventor 张金海
Owner 张金海