JP2005008124A - Theft preventive device for in-vehicle electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple theft preventive device for an in-vehicle electronic apparatus by using a horn or a lamp equipped as a standard as an alarm means. <P>SOLUTION: This device is provided with an alarm generation circuit relay 6 for controlling the operation of an alarm generator 4, a theft detection relay 15 for controlling a movable contact 6b of the alarm generation circuit relay 6, a theft detection circuit 14 connected to an electromagnetic coil 15c of the theft detection relay 15, and detection means 19a and 19b for opening the theft detection circuit 14 by removing the electronic apparatus 13. When the electronic apparatus 13 is removed, a movable contact 15b of the theft detection relay 15 is operated by the detection means 19a and 19b, and the movable contact 6b of the alarm generation circuit relay 6 is interlockingly operated so that an alarm is generated by the alarm generator 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to an antitheft device for a vehicle electrical component, and more particularly, to generate an alarm when an electrical component attached to a passenger compartment is removed without retrofitting a separate antitheft device. .
[0002]
[Prior art]
Various electrical components such as car audio and navigation systems are installed in the interior of the vehicle, but these electrical components are becoming very expensive as their functionality increases, and these electrical components are stolen. The risk of is high.
For this reason, various anti-theft devices have been proposed that detect an abnormality and issue an alarm when an attempt is made to enter the vehicle interior without using proper means. For example, a sensor that detects vibrations or shocks applied to the car body or windows, such as picking or unlocking with a rod or breaking a window glass, and issues an alarm. A sound sensor detects a sound wave of a specific frequency that is generated when unlocking or window glass breaks, and issues an alarm. A light sensor that detects the light of the room lamp that lights when the door of a vehicle parked at night is opened. When a person gets into the passenger compartment, the sensor detects that the space capacity of the passenger compartment changes and a warning is issued. When there is an intruder in the surrounding space set in the parked vehicle, there is one that detects this with an area sensor and issues an alarm. In addition, there exists a thing of patent document 1 as what notified the theft of an electrical component with the buzzer.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-11668
[Problems to be solved by the invention]
Many conventional anti-theft devices for vehicular electrical components are retrofitted to vehicles, but at present there are no anti-theft device power supply or signal supply wiring on the vehicle side, making it difficult to install. There was a problem that the installation cost was also necessary and the cost burden was high. Moreover, although there exist some which were equipped with the anti-theft mechanism in the electrical equipment itself, there existed a problem that a separate apparatus was needed and the cost became high.
[0005]
The present invention is intended to solve the above-described problem, and an object of the present invention is to provide a simple anti-theft device for vehicle electrical components by using a horn, a lamp, or the like equipped as standard in a vehicle as an alarm means. .
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the present invention, a horn provided as standard equipment in a vehicle is used as an alarm generation means at the time of theft of an electrical component,
A theft detection relay connected to the movable contact of the horn relay connected to the horn is provided, and a theft detection circuit is connected to the electromagnetic coil of the theft detection relay, and the theft detection circuit is connected to the theft by removing the electrical equipment. Detection means for opening the detection circuit,
When the electrical component is removed due to theft, the movable contact of the theft detection relay is actuated by the detection means, and in conjunction with this, the movable contact of the horn relay is closed to generate an alarm from the horn. An antitheft device for vehicle electrical components is provided.
[0007]
According to the above configuration, since the theft detection circuit is opened by intruding into the passenger compartment and removing the electrical components, the horn relay is closed and an alarm is generated accordingly, so that the intruder takes the electrical components out of the passenger compartment. Can be prevented in advance.
In addition to the horn, the lamp circuit may be applied so that the lamp blinks when the electrical component is removed, or both the horn and the lamp may be used as alarm generation means.
[0008]
The detecting means comprises two contact portions provided by separating a part of the theft detection circuit at a mounting portion of the electrical component to the vehicle body, and mounting screws for the electrical component connected to the two contacts. The two contacts are opened when the mounting screw is removed.
With the above configuration, the theft detection circuit can be opened and closed by attaching and detaching the mounting screws, so that the antitheft device can function without requiring special processing on the electrical component side.
[0009]
Further, the detection means is provided in a vehicle-side connector having two contact portions provided by separating a part of the theft detection circuit at a mounting portion of the electrical component to the vehicle body, and in a device-side connector of the electrical component. And a joint terminal that connects the two contact portions, and the two contacts may be opened when the device-side connector is removed.
According to this structure, a detection means can be comprised by the simple structure using the vehicle side connector connected to the vehicle side wire harness, and the apparatus side connector with which the electrical equipment was equipped. That is, two contact portions of the theft detection circuit are provided in the cavity of the vehicle body side connector, while the device side connector is provided with a joint terminal for connecting the two contact portions, so that both connectors once joined can be removed. The antitheft detection relay can be activated via the antitheft detection circuit.
[0010]
A branch line branched from a connection line to an operation switch for manually opening and closing the electromagnetic coil of the alarm generation circuit relay is connected to the fixed contact of the theft detection relay.
With this configuration, a connection circuit using a manual operation switch such as a horn or a light can be used as it is as an anti-theft alarm generator, so that an anti-theft device for vehicle electrical components can be provided at a low cost with a simple configuration. It can be controlled separately from the operation of a horn, a light, etc. by a normal operation switch.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram of a state in which a vehicle electrical component antitheft device 1 is assembled to a vehicle 2, and FIG. 2 is a circuit diagram. A horn 4 arranged as standard equipment in an engine room 3 is used as an alarm generator. We are using. A horn 4 is connected to a battery 5 in the engine room 3 via a horn fuse 7 and a horn relay 6.
[0012]
On the other hand, in the vehicle interior 9, the steering 10 is equipped with a horn switch 11 as an operation switch for operating the horn relay 6. Further, in the vehicle interior 9, a theft detection that operates the electrical equipment 13 such as a standard or optional audio and navigation system attached to the electrical equipment mounting portion 12 and the horn relay 6 via a separate theft detection circuit 14. Relay 15 is provided.
[0013]
As shown in FIG. 2, the circuit configuration of the antitheft device 1 is such that the fixed contact 6 a of the horn relay 6 is connected to the battery 5 via a fuse 7. The movable contact 6b of the horn relay 6 is connected to the horn 4, one end of an electromagnetic coil 6c for operating the movable contact 6b is connected to the power circuit 5a, and the other end is connected to the fixed contact 11a of the horn switch 11, and the movable contact 11 b is connected to the ground 16. The horn switch 11 is normally open, and a normal horn circuit 17 for operating the horn 4 by closing the circuit by manually operating the movable contact 11b of the horn switch 11 to contact the fixed contact 11a is constituted.
[0014]
A branch line 18 a branched from a connection line 18 connecting the horn switch 11 and the electromagnetic coil 6 c is connected to the fixed contact 15 a of the theft detection relay 15, and the movable contact 15 b is connected to the ground 16. One end of the electromagnetic coil 15 c is connected to the ground 16, the other end is connected to one end of the theft detection circuit 14, and the other end of the theft detection circuit 14 is connected to the battery 5 via the electrical component mounting portion 12. .
[0015]
The theft detection circuit 14 provided in the electrical component mounting portion 12 is provided with detection means 19a and 19b for opening and closing the theft detection circuit 14 in conjunction with the attachment and detachment of the electrical component 13. The detection means 19a, 19b are provided with two corresponding contact portions 20a, 20b, 21a, 21b provided by separating the theft detection circuit 14 at two locations, respectively, and one contact portion 20a, 20b provided on the electrical component 13 side. It comprises a device-side connector 22 that opens and closes and a mounting screw 23 that opens and closes the other contact portions 21a and 21b.
[0016]
As shown in FIG. 3 (A), one detection means 19a has contact portions 20a and 20b disposed in empty cavities in the vehicle-side connector 24 to which the device-side connector 22 of the electrical component 13 is connected. A joint terminal 22a for short-circuiting the contact portions 20a and 20b is arranged on the device-side connector 22 at the corresponding position. Thus, when the vehicle-side connector 24 and the device-side connector 22 are separated as the electrical component 13 is removed, the joint terminal 22a that has short-circuited the contact portions 20a and 20b is removed, and the contact portions 20a and 20b are Opened.
[0017]
As shown in FIG. 3 (B), the other detection means 19b arranges the contact portions 21a and 21b at intervals on the mounting bracket of the electrical component 13, and these contact portions 21a by the mounting screws 23 of the electrical component 13. , 21b is short-circuited. Thereby, when the attachment screw 23 is removed as the electrical component 13 is removed, the contact portions 21a and 21b are opened. In this embodiment, since the detection means 19a and 19b are arranged in series in the theft detection circuit 14, the contact portions 20a and 20b or the contact portions 21a and 21b are opened by any one of the detection means 19a and 19b. Then, the circuit of the theft detection circuit 14 is opened.
[0018]
Next, the operation of the antitheft device for vehicle electrical equipment having the above-described configuration will be described. In the state in which the electrical component 13 is mounted on the electrical component mounting portion 12, as shown in FIG. 2, the theft detection circuit 14 is closed by the detection means 19a and 19b, whereby the electromagnetic coil 15c of the theft detection relay 15 is Since the movable contact 15b and the fixed contact 15a are opened by being excited, the horn relay 6 does not operate.
[0019]
On the other hand, when the device-side connector 22 is pulled away from the vehicle-side connector 24 in an attempt to remove the electrical component 13 from the electrical component mounting portion 12, the joint terminal 22a that has short-circuited the contact portions 20a and 20b is removed, thereby detecting theft. The circuit 14 is opened. As a result, the electromagnetic coil 15c of the theft detection relay 15 is demagnetized, so that the fixed contact 15a and the movable contact 15b are joined, thereby exciting the electromagnetic coil 6c of the horn relay 6 and the fixed contact 6a and the movable contact. 6b is joined and the horn 4 emits an alarm sound.
[0020]
Further, if the mounting screw 23 is removed before the device-side connector 22 is removed, the short-circuit state of the contact portions 21a and 21b by the mounting screw 23 is released, so that the theft detection circuit 14 is opened, as described above. The horn 4 emits an alarm sound in the same manner as when the device-side connector 22 is removed.
If the electrical component 13 is to be removed from the electrical component mounting portion 12 in this way, the theft detection circuit 14 is opened and an alarm sound of the horn 4 is emitted, so that the electrical component 13 is stolen from the passenger compartment. Can be prevented.
[0021]
In the above-described embodiment, the example in which both the detection unit 19a using the device-side connector 22 and the detection unit 19b using the mounting screw 23 are provided has been described.
[0022]
In the present invention, the horn 4 is used as an alarm generator. However, an alarm means using light such as a headlight, a hazard lamp, or a flasher lamp may be employed. In either case, an anti-theft device for electrical equipment can be configured with a simple configuration that is simply equipped with a relay for alarm generator and a theft detection circuit in the horn and lamp operation circuits that are equipped as standard and controlled by switches. It can also be set as an optional part to be incorporated during vehicle production.
[0023]
【The invention's effect】
As is clear from the above description, according to the present invention, the horn equipped on the vehicle as a standard can be used as an alarm generator at the time of theft, so that the structure of the antitheft device is simple and inexpensive. Therefore, a standard vehicle can also be equipped with an anti-theft device. In addition, since no sensor or the like is required for the detection means, the operation is reliable and maintenance is not required.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an embodiment in which an antitheft device for vehicle electrical components of the present invention is attached to a vehicle.
FIG. 2 is a circuit diagram of an antitheft device for vehicle electrical components.
3A is a schematic diagram illustrating an example of a detection unit, and FIG. 3B is a schematic diagram illustrating another example of the detection unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Antitheft device 2 Vehicle 4 Horn 5 Battery 6 Horn relay 6b Movable contact 9 Car interior 11 Horn switch (operation switch)
12 Electrical component mounting portion 13 Electrical component 14 Theft detection circuit 15 Theft detection relay 15b Movable contact 15c Electromagnetic coil 17 Horn circuit (alarm generating circuit)
18 connection line 18a branch line 19a, 19b detection means 20a, 20b, 21a, 21b contact portion 22 device side connector 22a joint terminal 23 mounting screw 24 vehicle side connector

Claims (3)

The horn that comes standard on the vehicle is used as an alarm generation means when the electrical component is stolen.
A burglar detection relay connected to a movable contact of a horn relay connected to the horn is provided, and a burglar detection circuit is connected to an electromagnetic coil of the burglar detection relay. Detection means for opening the detection circuit,
When the electrical component is removed due to theft, the movable contact of the theft detection relay is actuated by the detection means, and in conjunction with this, the movable contact of the horn relay is closed to generate an alarm from the horn. An anti-theft device for vehicle electrical components. The detecting means comprises two contact portions provided by separating a part of the theft detection circuit at a mounting portion of the electrical component to the vehicle body, and mounting screws for the electrical component connected to the two contacts. The antitheft device for vehicle electrical components according to claim 1, wherein the two contacts are opened when the mounting screw is removed. The detection means is provided in a vehicle-side connector provided with two contact portions provided by separating a part of the theft detection circuit in a mounting portion of the electrical component to the vehicle body, and a device-side connector of the electrical component, The theft prevention of the electrical equipment for vehicles according to claim 1 or 2 which consists of a joint terminal which connects said two contact parts, and is constituted so that said two contacts may be opened when said equipment side connector is removed. apparatus.

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