CN2164739Y - Baby's electronic cradle - Google Patents

Abstract

The utility model relates to a direct current electronic cradle which comprises a support frame of the cradle, a movable cradle, a direct current electromagnetic induction device and a permanent magnet. In the direct current electromagnetic induction device, after a transformer is electrified with direct current, the iron core of the electromagnetic induction device is magnetized and is cut mutually with magnetic force lines of a permanent magnet which is positioned on below a cradle plate to generate induction voltage which is input into a monostable multi-resonant vibration circuit; the monostable multi-resonant vibration circuit is caused to output a pulse wave which is input into a primary coil again by an amplification circuit; the iron core is magnetized and is excluded with the permanent magnet in the same poles; the cradle is pressed to swing upwards; the cradle swings stably. The utility model has the advantage of convenient and safe operation.

Description

Baby's electronic cradle

The utility model relates to the Electric cradle that a kind of infant uses, and refers to a kind of DC electronic shaking table especially.

Shaking table is the household supplies that are popular that are used for nursing the infant.It is made up of movable shaking table and shaker stent, promotion activity shaking table swings back and forth it between shaker stent, with example make the infant feel comfortably cool, happy, finally can make its stable falling asleep, obviously, traditional shaking table need manually shake, and in a single day the people leaves, and shaking table stops swinging soon.Use very inconvenient.Along with continuous progress in science and technology, product develops towards the direction of automation, Electric cradle has also appearred on the market, it has adopted can control SCR as control element, with the electromagnetic induction device of 110V AC power as power, the conducting of coil in the controllable silicon SCR control transformer is so that the magnetic force that produces unshakable in one's determination, the permanent magnet under the bed board is located in attraction or repulsion, impels shaking table to swing back and forth.

This alternating electron shaking table is generating heat under the energising situation for a long time easily, can make the shaking table burning when serious, easily causes fire, even leads to the tragedy of infant's death.

In case the AC power cord breakage is made moist, also can cause the alternating current short circuit and the danger of cocking off or causing getting an electric shock.In addition, existing Electric cradle is that its shortcoming is the triggering and conducting shakiness with the break-make of controllable silicon SCR control alternating current, and shaking table shakes can be not steady yet, thereby it is not stable that the infant is slept.

The purpose of this utility model provides a kind of safe, swings stable infant's DC electronic shaking table, to overcome the shortcoming of existing alternating electron shaking table.

Detailed structure of the present utility model and embodiment can be in conjunction with the accompanying drawings.

Fig. 1 is the utility model schematic perspective view;

Fig. 2 is the utility model frame circuit diagram.

Fig. 3 is the utility model circuit theory diagrams.

It is by shaker stent 1, movable shaking table 2, and direct solenoid induction installation 3 and permanent magnet M form.Wherein direct solenoid induction installation 3 comprises dc source E, electromagnetic induction circuit 31, monostable multiplex circuit 32 and amplifying circuit 33, wherein dc source E is respectively to electromagnetic induction circuit 31, monostable multiplex circuit 32, amplifying circuit 33 provides DC voltage, monostable multiplex circuit 32 is behind the DC voltage that obtains dc source E output, export a pulse signal, be input to electromagnetic induction circuit 31 through amplifying circuit 33 amplifications, movable shaking table 2 is shaken, at this moment, direct solenoid induction installation 3 and above-mentioned permanent magnet M caused by relative motion one induced voltage, and be input in the monostable multiplex circuit 2.

Above-mentioned electromagnetic induction circuit 31 comprises transformer T, voltage-stablizer ZD ₁, resistance R ₄, R ₅And capacitor C ₃, primary coil TR among the transformer T ₁Among one end and the dc source E+and the 12V end connects, and the output of the other end and amplifying circuit 33 links, and the secondary coil TR of transformer T ₂One end is through R ₅With ZR in parallel ₁, R ₄, C ₃One end connects, the input of the stable state of order simultaneously multi-resonant oscillating circuit 32, secondary coil TR ₂Other end ground connection, ZD ₁, R ₄, C ₃The other end in parallel is ground connection also.

Above-mentioned monostable multiplex circuit 32 comprises monostable multi oscillation IC, variable resistor VR, voltage-stabiliser tube ZR ₂, capacitor C ₁, C ₂, resistance R ₂, R ₆, R ₇, IC ₇Pin is through ZD ₂, R ₇Connect dc source E+12V end, 14 pin through R ₇Connect E+12V holds 1 pin through R ₂VR connects E's+the 5V end, and 3 pin connect the input of electromagnetic induction circuit 31 through amplifying circuit 33, and 12 pin connect with the input of electromagnetic induction circuit 31, and in addition, 1 pin is through C ₁Connect 2 pin, 9 pin are through R ₆Connect the E+5V end, 10 pin are through C ₂Connect 9 pin.

Two transistor Q in the above-mentioned amplifying circuit 33 ₁, Q ₂, diode D ₂, current-limiting resistance R ₁Form the Darlington power amplification circuit.

Dc source E is exportable+12V ,+5V ,-the 12V DC voltage.

Now its operation principle is described in conjunction with Fig. 1, Fig. 2, Fig. 3.

Movable shaking table 2 utilizes chaining 22 to be hung on the shaker stent 1 in the utility model.

Dc source E provides+the 5V DC voltage to the monostable multi oscillation IC, impels IC output 3 pin to export a pulse signal after Darlington amplifying circuit 33 amplifies, and is input to the transformer T primary coil TR1 in the electromagnetic induction electricity electricity 31, at this moment, and TR ₁With dc source E ,+12V voltage is connected because the TR1 conducting, magnetization unshakable in one's determination among the transformer T and produce north and south polarity; And interact with the permanent magnet M that is positioned under movable shaking table 2 bed boards, and make movable shaking table 2 stressed to lower swing, secondary coil TR ₂Induce voltage, and produce magnetic field, and cut mutually, make TR again with the magnetic line of force of permanent magnet M ₂The input that produces induced voltage and be input to IC i.e. 12 pin, and this induced voltage is exported a pulse signal after IC handles, and its positive pulse signal is through current-limiting resistance R ₁Current limliting after Darlington amplifying circuit 33 amplifies, is input to the primary coil TR with big impedance again ₁And make it conducting, transformer T iron core is magnetized and produces north and south polarity, this polarity is identical with permanent magnet M polarity, repel each other and produce upwards swing of repulsive force and then promotion activity shaking table 2 owing to same polarity, this output pulse signal is a rectangular wave, therefore through after being equivalent to the time of impulse wave width, finish a negative pulse ripple, and make primary coil TR ₁Outage loses polarity, simultaneously, movable shaking table 2 also because of the gravity effect to lower swing, when investing the moment that permanent magnet M under the bed board and electromagnetic induction device 3 interact once more, secondary coil TR ₂Produce induced voltage again and be input to IC, make IC export pulse square wave once more, and after power amplification, make primary coil TR again ₂Therefore conducting, transformer T iron core are also magnetized again and are produced north and south polarity, and repel each other because of same polarity with permanent magnet M, and 2 oppositely swings up of movable shaking table so the movable shaking table 2 that makes that goes round and begins again rolls, swing up and down.

In sum, the utility model is to utilize dc source as power.Thereby overcome the shortcoming that AC power in the prior art easily makes the transformer heating, also avoided being decreased or because of the danger of the easy short circuit of humidity, electric shock because of power line.In addition because what adopt is dc source, so out on tours, use all very convenient, also safety, reliable.Also be pointed out that, design of the present utility model directly over movable shaking table 2 rocks electromagnetic induction device 3 time, its primary coil TR ₁Just conducting, and the moment after the conducting just disconnect, therefore very power saving, and what adopt is the 12V dc source, power is less, so transformer T volume can dwindle, cost reduction like this is easy to carry.

Claims (5)

1, a kind of infant's Electric cradle, comprise movable shaking table, bedrest, electromagnetic induction device, permanent magnet, what wherein electromagnetic induction device adopted is to be the AC control circuit of control element with the controllable silicon, it is characterized in that adopting direct solenoid induction installation 3, it is by dc source E, electromagnetic induction circuit 31, monostable multiplex circuit 32 and amplifying circuit 33 are formed, wherein dc source E is respectively to electromagnetic induction circuit 31, monostable multiplex circuit 32 and amplifying circuit 33 provide DC voltage, monostable multiplex circuit 32 is output one pulse signal behind the DC voltage that obtains dc source E output, be input to electromagnetic induction circuit 31 again through amplifying circuit 33 amplifications, movable shaking table 2 is shaken, and this moment, direct solenoid induction installation 3 was with described permanent magnet M caused by relative motion one induced voltage and be input in the monostable multiplex circuit 32.

2, infant's Electric cradle according to claim 1 is characterized in that described electromagnetic induction circuit 31 comprises transformer T, voltage-stabiliser tube ZD ₁, resistance R ₄, R ₅And capacitor C ₃, transformer T primary coil TR ₁One end is connected with 12V end among the dc source E, and the output of the other end and amplifying circuit 3 links, and the secondary coil TR of transformer T ₂One end is on the one hand through R ₅With ZD in parallel ₁, R ₄, C ₃One end connects, and the input with monostable multiplex circuit 32 links secondary coil TR simultaneously ₂Other end ground connection, ZD ₁, R ₄, C ₃The other end in parallel is ground connection also.

3, infant's Electric cradle according to claim 1 is characterized in that described monostable multiplex circuit 32 comprises monostable multi oscillation IC, variable resistor VR, voltage-stabiliser tube ZD ₂, capacitor C ₁, C ₂, resistance R ₂, R6, R ₇, the IC7 pin is through ZD ₂, R ₇Connect dc source E+12V end, 14 pin are through R ₇Connect E+12V end, 1 pin is through R ₂, VR connect E+5V end, 3 pin connect the input of electromagnetic induction circuit 31 through amplifying circuit 33, the output of 12 pin and electromagnetic induction circuit 31 links, in addition, 1 pin is through C ₁Connect 2 pin, 9 pin are through R ₆Connect the E+5V end, 10 pin are through C ₂Connect 9 pin.

4, infant's Electric cradle according to claim 1 is characterized in that two transistor Q in the described amplifying circuit 33 ₁, Q ₂, diode D ₂, current-limiting resistance R ₁Form the Darlington power amplification circuit.

5, infant's Electric cradle according to claim 1, it is characterized in that dc source E exportable+12V ,+5 ,-the 12V DC voltage.

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