CN2149399Y - Music candle - Google Patents

Abstract

The utility model discloses a music candle, adopting a sound integrated circuit switch device directly controlled by fire heat. The technical proposal of the adopted fire-sensing switch device is that one end of an electricity conductive rod fixed with double metal sheets, and the other end of the double sheets without fixation form two (a pair) contacts of the switch with another electricity conductive rod. The contacts of the switch are in separated condition at normal temperature, the transforming direction of the double metal sheets is the direction of shortening the distance between the contacts, getting the switch through automatically after the candle is lighted up. The utility model has the advantages of less cost, simple fabrication techniques, slight descending of the switch, and reliable height.

Description

Music candle

The utility model belongs to automatic control switch device technology field.

At present, some are used for the electronic audio birthday candle of celebration, can play music automatically after lighting, and stop automatically when extinguishing playing music, light or heat after their adopt photosensitive or thermal sensing element to experience candle to light, and starting switch circuit control acoustics circuit is played music.For example patent 25406(in Taiwan holds concurrently and is United States Patent (USP) 4,568,296) be in the sth. made by twisting core of candle, to be wrapped with the leaded light filament, utilize candle light to drive acoustics circuit and play music by this leaded light filament induction light sensing device control.This scheme will adopt more electron device, has complicated circuit, so production cost is higher.Because this electronic product is promptly passed into disuse after once using often, in switch, drop into the different genus of higher cost unfortunately.Electronic switch generally will produce 0.3 to 0.6 volt pressure drop in circuit, adopting button cell mostly is in this electronic product of power supply, this pressure drop will account for the voltage of supply quite great proportion, influenced the reliability and stability of product work, further improved cost thereby have to increase battery sometimes.And if candle places under the stronger light, even candle extinguishes, acoustics circuit can not turn-off and be directed at out of controlly, has influenced result of use.Domestic also have analogous products, claim to have obtained national patent, but product and specification sheets thereof (on its external packing box) both do not had the patent No. or number of patent application, did not have name of manufacturing factory and address yet.Its technical scheme is the lead that entrains into two mutual not conductings in candle is twisted with the fingers core, the heat carbonization insulation after utilizing candle to light and make this lead connect the driving acoustics circuit mutually to play music.The shortcoming of this scheme is that the dielectric of conducting after the carbonization often can not recover non-conducting state reliably after candle extinguishes, and causes acoustics circuit not turn-off and out of control.

Goal of the invention of the present utility model is to provide a kind of employing directly to control the musical candle of the switch device of audio ic by the temperature of fire, and it has low cost, and manufacturing process is simple, and the switch pressure drop is little and no matter advantages such as all very reliable are still cut-off in conducting.

The technical solution of the utility model is as follows: this musical candle (is made of wax and sth. made by twisting core candle body, the shape of candle body can arbitrarily design on demand), power supply (generally adopting button cell), music integrated circuit, audio device (generally adopting hummer or loud speaker) and switch (claim sense fiery switch) and the corresponding outer packaging of experiencing flame temperature are formed.Its junction circuit is seen accompanying drawing 1.This structure of feeling fiery switch is (referring to accompanying drawing 2): two conducting rods are fixed on the insulating frame, this insulating frame can adopt pottery or glass, also can adopt other refractory insulating material, the fixing of moulding and conducting rod can once be finished, it is fixing also can to make the back assembling respectively, (bimetallic strip is a material commonly used on a kind of electrotechnology to the last fixedly bimetallic strip of one of conducting rod, have and vary with temperature the character that changes its crooked curvature) an end, should fix available riveted joint or welding realization, the on-fixed end of this bimetallic strip and another conducting rod constitute two (a pair of) contacts of switch.The relative position of these two contacts is: the contact of switch is in separate stage at normal temperature; The direction of bimetallic strip temperature distortion is the direction that the distance between them is dwindled.This is felt in the sth. made by twisting core that fiery switch can be rolled in candle, also can place the top of candle.With conducting rod itself or by the fiery switch put in circuit of on line handle sense.When candle was unignited, the contact of switch was in separate stage, entire circuit no current and not working; Behind the lighted candle, the bimetallic strip temperature distortion, the relative position of two contacts dwindles until being in contact with one another and makes circuit turn-on, so just make it automatically to play out music; In case puff the candle out, bimetallic strip naturally cooling distortion and cut off circuit and stop automatically playing music.Feeling fiery switch is tens of megohms at the insulation resistance of the unignited preceding switch of candle, and this resistance descended after candle was lighted, and can pass through hundreds of milliamperes of electric currents, and the switch pressure drop is below 0. 1 volts, far below any electronic switch.No matter its action opens, and still closes, all very reliable.Its cost is also very cheap.Thereby reached the technique effect of expection.

Accompanying drawing 1 is an electrical schematic diagram of the present utility model, and 1 is power supply among the figure, and 2 are the fiery switch of sense, and 3 is music integrated circuit, and 4 is audio device; Accompanying drawing 2 is the structural representation of the fiery switch of sense, and wherein 5 is insulating frame, and 6 is conducting rod, and 7 is bimetallic strip.

Claims (1)

1, can play music automatically after a kind of the lighting, automatically stop the musical candle of playing music when extinguishing, by candle body, power supply, music integrated circuit, audio device and the fiery switch of sense are formed, it is characterized by: this structure of feeling fiery switch is that two conducting rods are fixed on the insulating frame, be fixed with an end of bimetallic strip on one of conducting rod, the on-fixed end of bimetallic strip and another conducting rod constitute two (a pair of) contacts of switch, the contact of switch is in separate stage at normal temperature, the direction of bimetallic strip temperature distortion is the direction that the distance between contact is dwindled, this is felt in the sth. made by twisting core that fiery switch can be rolled in candle, also can place the top of candle, with conducting rod itself or by on line feeling fiery switch put in circuit.

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