CN203182632U

CN203182632U - Letter reminding device

Info

Publication number: CN203182632U
Application number: CN 201320109169
Authority: CN
Inventors: 黄江彬; 林禹鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-03-06
Filing date: 2013-03-06
Publication date: 2013-09-11
Anticipated expiration: 2023-03-06

Abstract

The utility model relates to a letter reminding device. The letter reminding device comprises an infrared reflection circuit, a trigger circuit, a reset circuit and a wireless transmitting alarm circuit. Output signals of the infrared reflection circuit are transmitted to the trigger circuit, output signals of the trigger circuit are transmitted to the wireless transmitting alarm circuit, and the trigger circuit is further in two-way data communication with the reset circuit. Once a letter is delivered, the letter reminding device sends out a reminding message so that the master can quite conveniently receive the letter in time. The letter reminding device has the advantages of being small in size, light in weight, high in sensitivity, low in cost and the like.

Description

A kind of mail alarm set

Technical field

The utility model relates to a kind of alarm set, particularly be a kind of mail alarm set.

Background technology

Residential modern is all installed envelope and is received mailbox, if but owner does not open the chamber door inspection, and unclear whether the letter brought very big inconvenience.

The utility model content

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of mail alarm set is provided.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of mail alarm set, comprise infrared reflection circuit, circuits for triggering, reset circuit and wireless transmission warning circuit, the output signal of described infrared reflection circuit is transferred to circuits for triggering, the output signal of described circuits for triggering is sent to the wireless transmission warning circuit, described circuits for triggering also with the reset circuit bidirectional data communication.

Described infrared reflection circuit is made of the infrared ray that reception triode VT1 reception emitting diode VD1 sends.

The bistable circuit that the monostable circuit that described circuits for triggering are made up of the first not circuit IC1a, the second not circuit IC1b and capacitor C 2, resistance R 5 and the 3rd not circuit IC1c, the 4th not circuit IC1d form constitutes.

Described wireless transmission warning circuit adopts FDD-5 transmitter module IC2.

By adopting above-mentioned technical scheme, the beneficial effects of the utility model are: in case when having mail to deliver, the utility model sends prompting message at once, and what greatly make things convenient for owner in time collects mail, has that volume is little, quality is light, highly sensitive, characteristics such as cost is low.

Description of drawings

Fig. 1 is frame assumption diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1 and Figure 2, a kind of mail alarm set of the present utility model, comprise infrared reflection circuit 1, circuits for triggering 2, reset circuit 3 and wireless transmission warning circuit 21, the output signal of described infrared reflection circuit 1 is transferred to circuits for triggering 2, the output signal of described circuits for triggering 2 is sent to wireless transmission warning circuit 21, described circuits for triggering 2 also with reset circuit 3 bidirectional data communications.

Described infrared reflection circuit 1 is made of the infrared ray that reception triode VT1 reception emitting diode VD1 sends, described circuits for triggering 2 are by the first not circuit IC1a, the second not circuit IC1b and capacitor C 2, monostable circuit and the 3rd not circuit IC1c that resistance R 5 is formed, the bistable circuit that the 4th not circuit IC1d forms constitutes, when mail from the mailbox input port through out-of-date, receive triode VT1 and receive the infrared reflection signal that emitting diode VD1 sends, make negative pulse of the 1st pin input of the first not circuit IC1a, monostable circuit is triggered, regulate variable resistor R3 and can change trigger sensitivity, the low level of second not circuit IC1b output makes the 3rd not circuit IC1c, the bistable circuit upset that the 4th not circuit IC1d forms, the 3rd not circuit IC1c exports high level, make diode VD2 luminous by resistance R 7, the indication mailbox has letter, the 4th not circuit IC1d output low level is locked the first not circuit IC1a door seal simultaneously, and indicating status is unlikely to be disturbed.Because the 3rd not circuit IC1c output high level signal, through resistance R 8 current limlitings, make triode VT2 conducting, be input to the 2nd pin of FDD-5 transmitter module IC2, and deliver to the 3rd pin of FDD-5 transmitter module IC2, namely modulation signal input end CP modulates the high-frequency signal of emission, the antenna that FDD-5 transmitter module IC2 output connects i.e. the external modulated frequency electromagnetic waves of emission, makes things convenient for greatly that owner's in time collect mail.

After the door pickup of unpacking, to close the door again, door switch is connected, and resistance R 6, capacitor C 3 provide the start reset pulse for bistable circuit again.

Above-described only is a preferred embodiment of the present utility model, can not limit the scope that the utility model is implemented, and every equalization of doing according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.

Claims

1. mail alarm set, it is characterized in that: comprise infrared reflection circuit (1), circuits for triggering (2), reset circuit (3) and wireless transmission warning circuit (21), the output signal of described infrared reflection circuit (1) is transferred to circuits for triggering (2), the output signal of described circuits for triggering (2) is sent to wireless transmission warning circuit (21), described circuits for triggering (2) also with reset circuit (3) bidirectional data communication.

2. a kind of mail alarm set according to claim 1 is characterized in that: described infrared reflection circuit (1) receives the infrared ray that emitting diode VD1 sends and constitutes by receiving triode VT1.

3. a kind of mail alarm set according to claim 1 and 2 is characterized in that: the bistable circuit that the monostable circuit that described circuits for triggering (2) are made up of the first not circuit IC1a, the second not circuit IC1b and capacitor C 2, resistance R 5 and the 3rd not circuit IC1c, the 4th not circuit IC1d form constitutes.

4. a kind of mail alarm set according to claim 1 and 2 is characterized in that: described wireless transmission warning circuit (21) employing FDD-5 transmitter module IC2.