CN2765407Y - Anti-theft alarm apparatus for handset sheath - Google Patents

Abstract

The utility model discloses a theftproof and alarm device for a handset sheath, which comprises vibrating motor, wherein one output terminal of the vibrating motor is connected with a switch K <1>, and the other output terminal of the vibrating motor is connected with a switch K <2> connected with a sound alarm chip; the switch K <1> is connected with a power supply; the sound alarm chip is connected with the buzzer which is connected with a reed pipe; the reed pipe is connected with a power supply; the sound alarm chip is connected with an audion T <1>; the emitting electrode of the audion T <1> is connected with the buzzer, and the collecting electrode is connected with the power supply, and the base electrode is connected with the power supply through a capacitor C <1>. The utility model has the advantages of simple structure, low cost, and good theftproof and alarm effects.

Description

The cell-phone cover burglar alarm

Technical field

The utility model relates to a kind of burglar alarm that is used for.

Background technology

The circuit that is used for burglar alarm now is a lot, but is used for the warning circuit also not discovery on the market that antitheft mobile phone puts.Cell-phone cover is owing to the restriction of volume and self cost, and the warning circuit structure can not be too complicated, and cost can not be too high.

The utility model content

At above-mentioned deficiency, the utility model provide a kind of simple in structure, cost is low, the cell-phone cover burglar alarm of dependable performance.

For achieving the above object, the utility model by the following technical solutions: a kind of cell-phone cover burglar alarm involving vibrations motor, output of this vibrating motor and K switch ₁Link to each other another output and the K switch of this vibrating motor ₂Link to each other this K switch ₂Link to each other described K switch with the audio alert chip ₁Link to each other with power supply, described audio alert chip attach has buzzer, and described buzzer links tongue tube, and described tongue tube links power supply, and described audio alert chip attach has triode T ₁, described triode T ₁Transmitter connect described buzzer, collector electrode connects power supply, base stage is passed through capacitor C ₁Connect power supply.Described warning device places the both sides or the bottom of cell-phone cover.Described body is equipped with to be renovated, and this is renovated and puts by magnetic clasp, and the position of described tongue tube is corresponding with described magnetic clasp.

The utlity model has following advantage: mobile phone is placed in the described cell-phone cover, and mobile phone is oppressed described K switch ₁Disconnect K switch ₂Be closed condition, buckle described magnetic clasp, described tongue tube is off-state under the effect in magnetic field.When the thief implements larceny, to open and renovate, the magnetic field that magnetic clasp produces is ineffective to described tongue tube, described tongue tube K ₃The warning of sounding of closure, circuit turn-on, described audio alert chip, buzzer.When extracting mobile phone out, K switch ₁Lose pressure and closure, circuit turn-on, the warning effect is played in described vibrating motor vibration.But the utility model cell-phone cover burglar alarm effect that can well play alarming anti-theft simple in structure, with low cost.

Description of drawings

Fig. 1 is the utility model cell-phone cover burglar alarm circuit theory diagrams.

Embodiment

With reference to accompanying drawing 1, the utility model cell-phone cover burglar alarm involving vibrations motor, output of this vibrating motor and K switch ₁Link to each other another output and the K switch of this vibrating motor ₂Link to each other this K switch ₂Link to each other described K switch with the audio alert chip ₁Link to each other with power supply, described audio alert chip attach has buzzer, and described buzzer links tongue tube K ₃, described tongue tube K ₃Linking has power supply, and described audio alert chip attach has triode T ₁, described triode T ₁Transmitter connect described buzzer, collector electrode connects power supply, base stage is passed through capacitor C ₁Connect power supply, described body is equipped with to be renovated, and this is renovated and puts by magnetic clasp, and the position of described tongue tube is corresponding with described magnetic clasp.Described warning device places the both sides or the bottom of cell-phone cover.

Claims (3)

1, a kind of cell-phone cover burglar alarm is characterized in that the involving vibrations motor, output of this vibrating motor and K switch ₁Link to each other another output and the K switch of this vibrating motor ₂Link to each other this K switch ₂Link to each other described K switch with the audio alert chip ₁Link to each other with power supply, described audio alert chip attach has buzzer, and described buzzer links tongue tube, and described tongue tube links power supply, and described audio alert chip attach has triode T ₁, described triode T ₁Transmitter connect described buzzer, collector electrode connects power supply, base stage is passed through capacitor C ₁Connect power supply.

2, cell-phone cover burglar alarm according to claim 1 is characterized in that this device places the both sides or the bottom of cell-phone cover.

3, cell-phone cover burglar alarm according to claim 1 is characterized in that described body is equipped with to renovate that this is renovated and puts by magnetic clasp, and the position of described tongue tube is corresponding with described magnetic clasp.