CN201737077U - Bicycle anti-theft alarm based on balance induction - Google Patents

Abstract

The utility model discloses a bicycle anti-theft alarm based on balance induction, which comprises a main body casing connected with a bracket, and the bracket is fixedly connected to the bicycle beam, and is characterized in that a pendulum is fixed in the middle of the upper part of the main body shaft; the middle part of the main shell is provided with a balance pendulum, and the balance pendulum is connected to the swing shaft through a swing rod; the lower half of the main shell is fixed with a magnetic induction chip and a buzzer device, and the magnetic induction chip is connected to the The vertical position of the balance pendulum after it is stationary is opposite; an electronic password switch is arranged on the shell wall below the main body shell, and is connected with the magnetic induction chip through a wire.

Description

Bicycle Anti-theft Alarm Based on Balance Sensing

technical field

The utility model relates to a bicycle anti-theft alarm.

Background technique

There are two main types of bicycle anti-theft alarms on the market. One is the infrared induction alarm, that is, when a person reaches a certain distance from the alarm, the infrared induction device can trigger the alarm; the other is the vibration alarm. When the bicycle is vibrated (usually touched or moved), the vibration sensing device will be triggered and the alarm will be alarmed. The former is not suitable for use in public places or places with a large flow of people, otherwise it is very easy to generate false alarms, and the latter, due to the poor control of the sensitivity of the vibration alarm, often causes alarms due to slight touches by passers-by, resulting in false alarms. All bring inconvenience to car owner and others.

Contents of the invention

Aiming at the false alarm problem of the vibration sensing device, the utility model utilizes the characteristics of the imbalance when the bicycle is moved and the acceleration when it is pushed away, and provides a balance induction bicycle anti-theft alarm, which can greatly reduce the probability of false alarm.

In order to achieve the above purpose, the utility model adopts the following technical solutions and realizes: a bicycle anti-theft alarm based on balance induction, which includes a main body shell connected with a bracket, and the bracket is fixedly connected to the bicycle beam. It is characterized in that a pendulum shaft is fixed in the middle of the upper part of the main body shell; a balance pendulum is arranged in the middle part of the main body shell, and the balance pendulum is swingably connected with the pendulum shaft through a pendulum; the lower half of the main body shell is fixed with a magnetoelectric An induction chip and a buzzing device, the magnetoelectric induction chip is opposite to the vertical position after the balance pendulum is stationary; an electronic password switch is arranged on the shell wall under the main body shell, and is connected with the magnetoelectric induction chip through a wire.

In the above solution, the pendulum shaft is provided with a protruding part, and the main body shell is oscillatingly connected with the bracket through the protruding part of the pendulum shaft. The magnetoelectric induction chip and the buzzer device are fixed on the lower half of the main shell through a circuit board.

The utility model has the advantage that, in addition to the bicycle being lifted, destroyed by force, or pushed away, the alarm can be given. If the bicycle is pushed away or ridden away without being lifted, it is impossible to keep the bicycle at a constant speed during the push away process. If there is acceleration, the magnetic balance pendulum will swing and trigger the magnetic induction chip to alarm until the bicycle is stopped again. Therefore, within 50 meters, the magnetic force will be activated due to acceleration inertia or uneven ground during driving or riding. The balance pendulum swings out of balance and triggers an alarm. However, there is no malicious slight touching or leaning on the bicycle, or non-destructive slight shaking in the direction perpendicular to the wheels without lifting the bicycle, or when the vehicle is parked causing the vehicle body to tilt in the direction perpendicular to the wheels, due to the alarm The main body casing is swingably connected with the bracket through the protruding part of the pendulum shaft, so that the main body of the alarm remains vertically downward without tilting, so there is no alarm. This solves the problem of false alarms caused by improper sensitivity control of traditional alarms.

Description of drawings

Fig. 1 is the installation sketch map of the utility model alarm.

Fig. 2 is the structural diagram of the alarm device of the present invention.

In Fig. 1 and Fig. 2: 1. Beam; 2. Bracket; 3. Protruding part of pendulum shaft; 4. Main shell; 5. Pendulum shaft; 6. Balance pendulum; 7. Circuit board; 8. Magnetic induction chip; 9. Electronic password switch; 10. Swing rod; 11. Connecting wire.

Detailed ways

This alarm is an anti-theft alarm device specially designed for bicycles being moved. It includes: a magnetoelectric induction chip 8, a balance pendulum 6 made of permanent magnets, a set of electronic password switches 9, connecting wires 11, a pendulum shaft 5, a circuit board 7, a main body shell 4, and a pendulum shaft extension 3. The installation position of each component and its assembly and combination relationship are shown in Figure 1 and Figure 2. The bracket 2 is fixedly connected with the bicycle crossbeam 1, and the alarm body shell 4 is swingably connected with the bracket 2 through the extension part 3 of the pendulum shaft. 10 is swingably connected with pendulum shaft 5 . The circuit board 7 is provided with an alarm speaker and a magnetic induction chip 8 (the IC1 (VD5026) digital coding integrated circuit composed of an anti-theft intrusion detector and a miniature alarm transmitter can be used), and the circuit board 7 is fixed on the lower part of the main body shell 4. Half, make the magnetoelectric induction chip 8 be right below the vertical position after the balance pendulum 6 is stationary, the electronic password switch 9 is installed on the shell wall of the main body shell 4 bottom, is connected with the magnetoelectric induction chip 8 by connecting wire 11.

This alarm utilizes the principle that it is impossible to maintain the original horizontal balance state when the bicycle is lifted. Once the balance is out of balance, the balance pendulum 6 will swing left and right. Loudspeaker on the plate 7 sends whistle alarm, is put down until bicycle, and magnetic force balance pendulum 6 gets back to original vertical position again, and alarm just stops. When the car owner uses the car, first press the preset electronic password switch 9 to close the magnetic induction chip 8, and then it can be used freely without causing false alarms.

In addition, since the alarm body shell 4 is swingably connected with the support 2 through the pendulum extension part 3, the alarm can also rotate with the pendulum 5, so as to prevent the magnetic induction chip 8 from being connected to the balance when the car is parked on an uneven place. False alarms due to changes in the relative position of the pendulum.

Electronic password switch 9 can adopt the password switch on the CY-0785 miniature electronic password storage box (the box of some little articles such as being used to deposit money), and its lead wire is connected on the magnetoelectric induction chip 8 of the present utility model and gets final product.

Claims (3)

1. A bicycle anti-theft alarm based on balance induction, comprising a main body shell connected with a support, said support is fixedly connected on the bicycle crossbeam, it is characterized in that a pendulum shaft is fixed in the middle of the upper part in the main body shell; the main body The middle part of the housing is provided with a balance pendulum, and the balance pendulum is connected to the pendulum shaft through a swing rod; the lower part of the main housing is fixed with a magnetoelectric induction chip and a buzzer device, and the magnetoelectric induction chip is connected to the balance pendulum. The vertical position of the hammer after resting is relative; the shell wall under the main shell is provided with an electronic password switch, which is connected with the magnetoelectric induction chip through a wire. 2 . The anti-theft alarm for bicycles based on balance induction according to claim 1 , wherein the pendulum shaft is provided with a protruding part, and the main body shell is oscillatingly connected with the bracket through the protruding part of the pendulum shaft. 3 . 3. The anti-theft alarm for bicycles based on balance induction as claimed in claim 1, wherein the magnetic induction chip and the buzzer are fixed on the lower half of the main body shell through a circuit board.

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