CN2205021Y - Multifunctional timer for electric appliances - Google Patents

Abstract

The utility model provides an improved timer for electric appliances, which is suitable for automatically switching on and cutting off the power supply of household appliances in definite time. The timer for electric appliances is mainly characterized in that a special clock chip is matched with the display screen of a corresponding LED. Two alarm output terminals of the clock chip are matched with a proper switch electronic circuit in order to abstract timing on or timing off signals to drive a load relay. The on-off state of the power supply of a load is controlled by the load relay. Seen from the structure, the utility model is an autonomous timer with a power cord and a digital clock display. The utility model is provided with two output sockets (one double-core socket and one three-core socket), so various electric appliances can be connected with the utility model. When not used as a timer, the utility model can be used as a clock with a digital display.

Description

Multifunctional timer for electric appliances

The utility model relates to a kind of electrical appliance multipurpose timer, is particularly suitable for household electrical appliance are realized that timing automatic connects and cut off the electricity supply.

Existing timer mainly contains two kinds of Purely mechanical and analog electrical minors.The timer of Purely mechanical is the form that adopts special motor of dimension or clockwork spring, add that switch with mechanical contact controls the turn-on time of electrical appliance, general this timer has only 2 hours timing ranges, because the reed of connecting terminal is pressed on the working of plastics, contacting and disconnection moment required time are longer, contact spark is big, temperature rise, thus easily cause plastic deformation, reed displacement.Though this timer is simple in structure, cost is low, timing range is little, error is big, and reliability is relatively poor.The timing range of analog electrical minor timer was at 12-24 hour, it is to adopt conventional separating electronic components to combine with general counting circuit, come regularly open and close electrical appliance by adjusting pulse width, and adjust timing range with the mode of adjusting potentiometer, so timing error is big, consistance is poor, and indication is not directly perceived.In view of the characteristics of above two kinds of timers, to popularize day by day and in people's daily life, play under the situation of significant role at present household electrical appliance, these two kinds of timers can not satisfy people's needs.

The purpose of this utility model provides a kind of intuitive display, timing error is little, reliability is high electrical appliance timer.

The purpose of this utility model is achieved in that timer comprises power input plug and the power output socket that is installed on the timer housing, and the control section of timer partly is made up of timing input media, the clock chip that is used to control timing, the self-lock switch circuit of keeping timing signal and timing executive component etc.; Said timing input media comprises selector switch, time enter key and time display screen, observes and operation for convenient, and input media all is arranged on the panel of timer.The selector switch of input media generally can be provided with clock, decides ETAD expected time of arrival and departure, close gears such as time and daily open and close surely.The utility model regularly principle is to utilize two warning output terminals of clock chip to mix self-lock switch circuit (its effect is to keep timing signal), extract the signal of regularly opening or regularly closing and drive load-relay, be responsible for switching on or off the power supply of load by load appliance.When timer used, energized and electrical appliance respectively, control part were got electricity and just can be started working, and time display screen is luminous.General operation procedure is: input current time → settings electrical appliance turn-on time → setting electrical appliance trip time → selector switch is dialled back " clock " grade.Like this, under the control of internal timing circuit, electrical appliance just can switch on and off power supply by the timing executive component according to the time of setting, and reaches purpose regularly.The utility model can be set electrical appliance arbitrarily and open surely and close the time surely in 24 hours.

The utility model is compared with existing timer in the market, intuitive display, timing error is little, simple to operate, and this product with compact structure, volume are little, in light weight, not doing the time spent as timer can also use as digital dock, owing to adopted the large LED screen display screen, has more nighttime visibility.

Fig. 1 is the mechanical construction drawing of an embodiment of the present utility model.

Fig. 2 is an electrical schematic diagram of the present utility model.

Below in conjunction with accompanying drawing the utility model is further described.

Housing 2 of the present utility model is made Three Diamond, power input plug 1 and two input socket (one two cores, one three core 3) draw and be installed on the housing by housing respectively, the control element of timer mostly is installed in the housing, and selector switch 4, time enter key 5 and time display screen 6 are arranged on the panel 7 of timer.The LM8364 that the utility model clock chip 8 selects for use SANYO GS company to produce, display screen 6 is selected 24 hours standard static clock display screens for use, and LM8364 reaches with connecting of display screen and respectively goes between function with reference to LM8364 and display screen service manual.Selected lead-in wire to meet power supply Vss in 24/12 hour of LM8364, form 24 hours display format, because input is 50HZ, 50/60HZ selects lead-in wire also to meet Vss, go up not have and directly drive pin because be connected into after 24 hours forms LM8364, so a flash-point is received Vss by a current-limiting resistance R8 and directly lighted second on the display screen.LM8364 warning 1 output is set to set opens output, and 2 outputs of reporting to the police are set to setting and close output, insert the anode of diode V7, V6 respectively, as the input signal of self-lock switch electronic circuit.The self-lock switch circuit comprises capacitor C 3, C4, C5, resistance R 3, R4, R5, R6, R7, and diode V6, V7 and triode V9, V10, during conducting of two switch triode V9, V10, another is closed, and not conducting simultaneously.Because circuit is the self-locking form, do not change existing state when all not having the signal input as two input ends.The purpose that will reach for the utility model: after regularly opening signal output, when regularly not closing signal triggering, the state of regularly opening is kept in the circuit self-locking always; Otherwise after regularly closing signal output, when regularly not opening signal triggering, circuit is just kept regularly off status always, has so just realized the function of continuous timing.V6, V7 get final product with general switching diode 4148 for the output terminal of protection master chip LM8364; V9, V10 have no special requirements as switch triode, can select common plastic packaging triode for use; Switch triode base stage current-limiting resistance when resistance R 6, R7 are signal output; Select for use 5.6K carbon resister R3, R4, R5 to be similarly current-limiting resistance, all select the 5.6K carbon resister for use, capacitor C 3 is used for anti-interference, when timer is just switched on, make switch triode V9 base stage be in low level closed condition, so C3 selects the 0.22UF ceramic disc capacitor just can meet the demands.Work more reliably in order to make timer, the warning 2 of LM8364 is closed and is connect capacitor C 4, warning 1 is closed and is connect capacitor C 5, C4, C5 are integrating capacitor, as timing signal by reporting to the police 1 or when reporting to the police 2 outputs, close another timing signal by an integrating capacitor C4 or C5, so just can make timer per minute in 24 hours all can set timing, reach the effect that uses freely.The effect of C4, C5 is can turn off timing signal in the certain hour constant, selects the 0.022UF ceramic disc capacitor to get final product.Executive component is load-relay KA, and the signal of being opened or regularly being closed by the timing of switch electronic circuit extraction drives load-relay KA, is responsible for switching on or off the power supply of electrical appliance by KA.

Claims (1)

1, a kind of electrical appliance multipurpose timer, comprise power input plug (1) and be installed in power output socket (3) on the housing (2), it is characterized in that: the control section of timer is by the timing input media, be used to control the clock chip (8) of timing, the self-lock switch circuit and the timing executive component KA that keep timing signal form, the voltage Vss that the 220V line voltage produces behind power circuit part rectifying and wave-filtering receives the lead-in wire 19 of clock chip (8) and self-lock switch circuit as power supply, the 17th of clock chip (8), 42 2 warning output leads are received two input end V7 of self-lock switch circuit respectively, V6, signal by the output of self-lock switch circuit is connected to executive component KA, and the other end of KA is connected to the load electrical appliance; Said timing input media comprises selector switch (4), time enter key (5) and time display screen (6), be arranged on the panel (7) of timer, selector switch (4), time enter key (5) one ends link to each other with power supply Vss, and what the other end was connected to the 5th, 11,16,8,9 lead-in wires of clock chip (8) and self-lock switch circuit respectively often opens input end.

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