JP3045834U - Anti-theft alarm attached to bicycle - Google Patents

Abstract

(57) [Summary] [Purpose] When attempting to move or break a locked bicycle, the acceleration detector detects the shaking of the bicycle, issues a warning with a sound generator, and issues a warning. To prevent theft. [Structure] An acceleration detector, a sound generator, and a circuit connection switch that detect the swing of a bicycle are integrated into a bicycle lock so that they cannot be easily disassembled. Has a mechanism that operates. Further, when the key is removed, the screw hole shielding plate closes the hole formed in the case of the lock body so that the screw holding the battery holder can be loosened. That is, if the owner of the bicycle does not insert the key, the battery cannot be removed for replacement or the like.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 When trying to move or break a locked bicycle, the acceleration detector detects the shake of the bicycle and issues a warning with a sound generator to prevent the bicycle from being stolen. Things.

[0002]

[Prior art]

 Locks on conventional bicycles can be easily broken, often matching theft.

In order to prevent the damage caused by the theft, there are chains other than locks attached to the bicycle that are further fastened so that the wheels of the bicycle cannot be rotated. In addition, it was troublesome to store chains and the like when removed, which was inconvenient.

[0004]

[Problems to be solved by the invention]

 The present invention has been made in view of such problems, and its purpose is to lock the bicycle attached to the bicycle and operate the electric circuit simply by removing the key, as in the past, When an external force is applied to a bicycle, it will sound a warning and provide a device to prevent theft.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the bicycle anti-theft device of the present invention integrates an acceleration detector, a sound generator, and a circuit connection switch for detecting a shake of a bicycle into a bicycle lock so that they cannot be easily disassembled. It has been incorporated.

[0006] When the bicycle is locked and the key is removed, a switch connects the circuit, and the sound generator is activated by a signal from the acceleration detector.

[0007] Furthermore, the battery as a power source has a structure that cannot be removed and attached unless it is locked, that is, if the key is not inserted.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a mechanism of an anti-theft alarm attached to a bicycle of the present invention. FIG. 2 is a block diagram of an electric circuit.

FIG. 1 (12) shows a bicycle lock body. The anti-theft alarm of the present invention is built in the case (11) and is integrated with the bicycle lock body (12). I have.

When the lever (13) is pushed down, locked, and the key (4) is removed, the circuit is energized as shown in FIG.

In this state, when an external force is applied to the bicycle or the key is broken and the anti-theft device of the present invention is shaken, the acceleration detector (1) detects the vibration and the sound is detected. Sends a signal to the signal transmission IC.

The sound generator (2) emits a sound such as “It is a stolen car” according to the signal.

When the key is removed, the case (10) is screwed forward by the spring (15) so that the screw (9) holding the battery holder (6) can be loosened. The hole (11) is closed so that the screw (9) holding the battery holder (6) cannot be loosened.

That is, if the bicycle owner does not insert the key, the battery cannot be removed for replacement or the like.

[0016]

[Effects of the Invention] Since the present invention is configured as described above, by attaching the anti-theft device of the present invention to the bicycle, simply locking the bicycle as in the past, the effect of the locking and further locking can be achieved. It is effective to prevent theft of the bicycle by audible alarms that can be heard by those who try to break the bicycle or steal the bicycle while it is locked, and by others.

[Brief description of the drawings]

FIG. 1 is a view showing a mechanism of an anti-theft alarm attached to a bicycle according to the present invention.

FIG. 2 is a block diagram of the anti-theft alarm circuit mounted on the bicycle of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Acceleration detector 2 Audio generator 3 Switch 4 Key 5 Audio signal transmission IC 6 Battery holder 7 Battery 8 Spring 9 Battery holder fixing screw 10 Screw hole shield plate 11 Case 12 Bicycle lock body 13 Lever

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical indication location G08B 13/06 G08B 13/06 15/00 15/00 23/00 520 23/00 520A

Claims (1)

[Utility model registration claims] An acceleration detector (1) and a sound generator (2)
When the bicycle is locked, the acceleration detector (1)
Switch (3) connected to the electric circuit of the sound generator (2)
Built-in anti-theft machine for bicycles.