CN2030344U

CN2030344U - Electronic timer

Info

Publication number: CN2030344U
Application number: CN 88204077
Authority: CN
Inventors: 彭瑞明; 王承志
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-04-19
Filing date: 1988-04-19
Publication date: 1989-01-04

Abstract

The utility model discloses an electronic timer which is composed of an electronic watch integrated block, a shaping circuit, a trigger, a power driving circuit, a switching circuit and a relay. The electronic timer can accomplish timing at any time within 24 hours. The utility model has two functions of timing starting up and timing shutting down.

Description

Electronic timer

A kind of electronic timer belongs to the electronic automatic control device field.

Along with people to improving constantly that the electric equipment products robotization requires, many electric equipment products all have timing function.But the timer on present most of electrical equipment all is a mechanical timer, and this timer timing is lacked (30～90 minutes), complex structure, and the cost height, volume is big, easily break down, and disagreeable noise the time is also sent in work.Though on some electricity product electronic timer is arranged also, they adopt mostly and discharge and recharge delay circuit, so also there is the short shortcoming of timing.

The electronic timer that the utility model proposes, owing to adopted present existing accutron integrated package as the center control element, so can realize twenty four hours any time timing, prolong timing greatly, and can solve the shortcoming of mechanical timer construction complexity, big, the easy fault of volume comprehensively.

Accompanying drawing 1 is the block diagram of this timer, and it is by the electronic watch integrated package, shaping circuit, and trigger, power driving circuit, on-off circuit and relay coil constitute.Accompanying drawing 2 is detailed circuit schematic diagrams of this timer.

The contrast accompanying drawing describes timer construction and operation principle in detail below.

The electronic watch ic chip ₁Have three K switch ₁, K ₂, K ₃, can set the electronic watch alarm time by regulating them, the output terminal (a end) that primary electron table integrated package is connected to voltage ceramic sound equipment sheet is connected to by C ₁, C ₂, D ₂The C of the shaping circuit that constitutes ₁One end like this, one arrives when setting constantly, and a end is promptly exported a signal, and it becomes a undersuing by shaping circuit, and this signal removes to trigger trigger IC ₂, make it be output as high level, (and IC ₂The resistance R that connects of 1,2 end spaies ₁It is poor to keep certain potentials, thereby makes IC ₂Operate as normal), this high level signal impels by R ₂, R ₃, D ₂, BG ₁The drive circuit works that constitutes, BG ₁Conducting has electric current to flow through among the relay coil J.On-off circuit is by K switch ₄With relay switch K _JConstitute K ₄3 ends and K _J5 ends, K ₄2 ends and K _J6 ends link to each other K _J5 and 6 ends be two contacts of relay, 6 are normally closed contact (be relay when not working 4 link to each other with 6), electric current makes K once flowing through among the J like this _JAction, 4 link to each other with 5, like this, if K originally ₄1 link to each other with 2, then can realize the timing shutdown function, if K ₄1 link to each other with 3, then can realize the timing start-up function.D in the driving circuit ₂Be light emitting diode, be used for indicating relay and whether work.

Element in the entire circuit all is welded on the printed circuit board (PCB), then overall fixed in a plastic casing, K switch ₁, K ₂, K ₃And K ₄Be exposed at the shell outside, IC ₁LCD panel also be exposed on the external.

By as seen above-mentioned, the electronic timer that the utility model proposes, not only timing is long, and is simple in structure, and cost is low, and can also realize timing start-up and two kinds of functions of timing shutdown.

Claims

1, a kind of electronic timer is characterized in that:

This timer is made of electronic watch integrated package, shaping circuit, trigger, power driving circuit, on-off circuit and relay coil, wherein,

(1) shaping circuit is by C ₁, C ₂And D ₁Constitute, the three is T type structure;

(2) power driving circuit is by R ₂, R ₃, light emitting diode D ₂And BG ₁Constitute;

(3) relay coil J is positioned at BG ₁Between emitter and the ground;

(4) on-off circuit is by K ₄With relay switch K _JConstitute K ₄Two fixed contacts respectively and K _JTwo fixed contacts link to each other;

Electronic watch integrated package alarm clock signal output part α end is connected to the C of shaping circuit ₁One end, C ₂End is connected to IC ₂Input end, IC ₂Output terminal is connected to BG in the power driving circuit ₁Base stage.