JP2000142323A - Theft preventing device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display high theft preventing effect in spite of low manufacturing cost with simple constitution. SOLUTION: An alarm generating circuit KH drives an alarm 11 regarding a theft act as committed upon detecting the displacement of an electrically connected state in each place of a vehicle such as a door key, an ignition key or between conductive theft preventive warning members 10 built in a junction box or the like for a starter realy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft device for a vehicle configured to prevent theft of a vehicle, and more particularly, to a change in an electrical connection state between anti-theft security members caused by theft. When it is detected, it is assumed that the theft act has been performed and an alarm is issued, so that despite the simple configuration and the low manufacturing cost,
The present invention relates to a vehicle antitheft device capable of exhibiting a high antitheft effect.

[0002]

2. Description of the Related Art Conventionally, when a driver locks a door and leaves a vehicle, and then a third party unlocks or opens the door using unauthorized means other than a key, theft is performed. 2. Description of the Related Art A vehicle antitheft device for preventing theft of a vehicle by issuing an alarm on the assumption that the vehicle is stolen is generally known.

According to such a vehicle anti-theft device,
It is possible to prevent a vehicle theft accident.

[0004]

However, the above-mentioned conventional vehicle anti-theft device has a complicated structure and a large-scale device configuration, and the manufacturing cost tends to increase accordingly. There were inherent issues to be addressed.

[0005] Therefore, there has been a long-awaited demand for development of a new technology that can exhibit a high antitheft effect despite its simple configuration and low manufacturing cost.

[0006] The present invention has been made in view of the above-mentioned circumstances, and it is assumed that when the displacement of the electrical connection state between the anti-theft security members caused by the theft is detected, the theft is activated. An object of the present invention is to provide a vehicle anti-theft device capable of exhibiting a high anti-theft effect with a simple configuration and low production cost, by issuing a warning by assuming an alarm.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention of claim 1 is an anti-theft device for a vehicle, which is configured to prevent theft of a vehicle. A conductive anti-theft alarm assembly incorporated in various parts of the vehicle so as to displace the electrical connection between them, alarm means for issuing an alarm, and displacement of the electrical connection between the anti-theft alarm assembly And a drive control means for driving the alarm means on the assumption that the theft has been acted upon.

According to the first aspect of the present invention, the drive control means controls the electric connection between the conductive anti-theft security members incorporated in various parts of the vehicle, for example, a door box, an ignition key, or a junction box for a starter relay. When the displacement of the connection state is detected, it is considered that theft has been actuated and the alarm means is driven. Therefore, despite the simple configuration and the low manufacturing cost, a high antitheft effect is obtained. It is possible to obtain a vehicle anti-theft device capable of exhibiting the above, and it can be expected that the vehicle anti-theft device will greatly contribute to the spread of the vehicle anti-theft device.

Further, according to a second aspect of the present invention, the anti-theft alarm assembly member comprises a conductive member constituting a part of a key cylinder into which a key is inserted, and a conductive spring member abutting on the conductive member. The gist is to be composed.

According to the second aspect of the present invention, the anti-theft alarm assembly member includes a conductive member forming a part of a key cylinder into which a key is inserted, and a conductive spring member abutting the conductive member. Therefore, the abutting state between the conductive member forming a part of the key cylinder and the conductive spring member is lost due to theft such as destruction of the key cylinder by a thief. In such a case, the displacement of the electrical connection state between the anti-theft alarm members is detected, and it is considered that the theft has been performed, and the alarm means is driven. It is possible to obtain a vehicle anti-theft device capable of exhibiting a high anti-theft effect in spite of its configuration and low manufacturing cost, and to make a great contribution to the spread of the vehicle anti-theft device. It is possible to wait.

Further, according to a third aspect of the present invention, the conductive member forming a part of the key cylinder is a cylinder knob provided in the key cylinder, and the conductive spring is in contact with the conductive member. The gist of the present invention is that the member comes into contact with the cylinder knob so as to be fitted thereto.

According to the third aspect of the present invention, the conductive member constituting a part of the key cylinder is a cylinder knob provided in the key cylinder, and the conductive spring member abutting on the conductive member is Because the abutment is performed by fitting to the cylinder knob, the cylinder knob provided in the key cylinder and the conductive spring member are connected to each other due to theft such as destruction of the key cylinder by a thief. When the contact state is lost, the displacement of the electrical connection state between the anti-theft security assembly members is detected, and as a result that the alarm means is driven on the assumption that the theft has been performed, the alarm means is driven. Or, similarly to the invention of the second aspect, it is possible to obtain a vehicle anti-theft device capable of exhibiting a high antitheft effect with a simple configuration and at a low manufacturing cost. Moni, can be expected to play a significant contribution to the spread of anti-theft device.

Still further, according to a fourth aspect of the present invention, the anti-theft alarm assembly member is provided in the junction box so that when a starter relay is removed from the junction box of the vehicle, the electrical connection between the two is displaced. The gist is that it is incorporated into.

According to the fourth aspect of the present invention, the anti-theft security member is incorporated in the junction box so that when the starter relay is removed from the junction box of the vehicle, the electrical connection between them is displaced. Therefore, when the thief attempts to illegally start the engine and removes the starter relay from the junction box of the vehicle, the displacement of the electrical connection state between the anti-theft security members is detected, and the theft is performed. As a result, the alarm means is driven and as a result, similarly to the first to third aspects of the invention, a vehicle theft capable of exhibiting a high antitheft effect with a simple configuration and at a low manufacturing cost. It is anticipated that an anti-theft device can be obtained and that it will greatly contribute to the spread of anti-theft devices for vehicles. Can.

The invention according to claim 5 further comprises a start prohibition unit for prohibiting the start of the engine of the vehicle, wherein the drive control unit detects a displacement of an electrical connection state between the anti-theft alarm assembly members. At this time, the gist is that the starting prohibiting means is driven on the assumption that theft has been performed.

According to the fifth aspect of the present invention, when the displacement of the electrical connection state between the anti-theft security members is detected, the drive control means drives the start prohibiting means on the assumption that theft has been performed. Therefore, similarly to the first to fourth aspects of the present invention, it is possible to obtain a vehicle anti-theft device that has a simple configuration and can exhibit a high anti-theft effect despite its low manufacturing cost. At the same time, it can be expected to make a great contribution to the spread of the vehicle anti-theft device.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a vehicle antitheft device according to the present invention will be described below in detail with reference to the drawings.

First, a vehicle anti-theft device according to a first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a perspective view of a key cylinder showing a main part of a vehicle anti-theft device according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the key cylinder shown in FIG. Drawing 3 and Drawing 3 are figures showing the alarm generation circuit which constitutes a part of the anti-theft device for vehicles concerning a 1st embodiment of the present invention.

In these figures, 1 is a cylindrical conductive key cylinder into which an ignition key is inserted, 2 is a cylindrical ignition switch, 3 is a lock claw, and 4 is an ignition switch 2. Side part, 5 is a conductive cylinder knob, 6 is a cylinder knob 5
Is a contact formed by a conductive spring member, 8 is an electric wire, and 9 is a steering shaft.
The first anti-theft security member 10 is constituted by the cylinder knob 5 and the contact 7.

The anti-theft device for a vehicle according to the first embodiment is devised with respect to the constituent members of the key cylinder 1, and includes a key cylinder 1 having an external appearance as shown in the perspective view of FIG. And That is, the key cylinder 1
Has an internal structure shown in a partially cutaway exploded perspective view of FIG. An ignition switch 2 attached to the key cylinder 1 includes a plurality of locking pawls 3 erected at equal intervals on the outer periphery thereof, and a through hole 6 for inserting a cylinder knob 5 provided on a side surface portion 4 thereof. And is provided.

The contact 7 is fixed to the through hole 6 by welding or screwing. The other end of the electric wire 8 fixed to the contact 7 by soldering or the like is output to the back side of the ignition switch 2 through the through hole 6 and connected to the battery power supply Vcc through a circuit element such as a diode described below. I have. In addition, the contact 7 normally holds the cylinder knob 5
It is configured to maintain a fitted state with respect to.

The entirety of the key cylinder 1 constructed as described above is fixed to the steering shaft 9.
The steering shaft 9 is grounded.

In the first embodiment, the alarm generation circuit KH functioning as the drive control means shown in FIG. 3 is constructed by interposing the first anti-theft security assembly member 10 among the components of the key cylinder 1 described above. are doing.

As shown in FIG.
Battery power supply Vcc and first to sixth resistors R1 to R6
And the first and second transistors Tr1 and Tr2, the diode D1, and the first anti-theft security member 10 configured by combining the cylinder knob 5 and the contact 7. Reference numeral 11 denotes an alarm which functions as alarm means.

In the above-described alarm generation circuit KH, the steering shaft 9 is diverted as a part of the grounding path in the alarm generation circuit KH, and the grounding path includes the first
The cylinder knob 5 and the contact 7 constituting the anti-theft alarm assembly member 10 are assembled so as to be interposed while maintaining a contact state by fitting. In other words, on the grounding path, an electrical switch is configured using the first anti-theft security assembly member 10 configured by a combination of the cylinder knob 5 and the contact 7.

Next, the operation of the vehicle anti-theft device according to the first embodiment will be described. For example, when a thief cuts the key cylinder 1, the cylinder knob 5 is detached from the contact 7. Then, when the contact state due to the fitting is lost, the grounding path including the first anti-theft security assembly member 10 is disconnected from the ground. Then
In the alarm generation circuit KH shown in FIG. 3, the potential at point A, which is the base potential of the first transistor Tr1, becomes "high", and the first transistor Tr1 is turned on.

Then, the potential at point B, which is the base potential of the second transistor Tr2, becomes "low", and as a result of the conduction of the second transistor Tr2, a current flows through the alarm 11 and the alarm 11 issues an alarm. A sound is emitted.

Next, a vehicle anti-theft device according to a second embodiment of the present invention will be described with reference to FIGS.

FIG. 4 is an exploded perspective view of a door knob representing a main part of a vehicle anti-theft device according to a second embodiment of the present invention, as viewed from the back side, and FIG. 5 is a perspective view of the second embodiment of the present invention. It is a figure showing the alarm generation circuit KH which comprises some anti-theft devices for vehicles. The alarm generation circuit KH shown in FIG.
Since it has a circuit configuration that is substantially the same as the alarm generation circuit KH described in the first embodiment, circuit elements common to both are denoted by common reference numerals, and redundant description thereof will be omitted. The following description focuses on the components that differ between the two.

In FIG. 4, 12 is a door knob, 13 is a key cylinder having conductivity for a door key, 14 is a cylinder case, 15 is a cylinder switch, 16 is a retainer clip composed of a conductive spring member, and 18 is an electric wire. is there. The key cylinder 13 for the door key and the retainer clip 16 constitute a second anti-theft security member 17.

In the vehicle antitheft device according to the second embodiment, the components of the door knob 12 are devised.

Generally, a key cylinder 13 for a door key
Is fixed to the cylinder case 14 by inserting a retainer clip 16, but the thief drops the key cylinder 13 into the door using a hammer or a screwdriver and turns the cylinder switch 15 ( In the case of using a link bar as well), it may be attempted to illegally unlock the door key.

Therefore, in the second embodiment, the retainer clip 16 fitted into the groove formed over the outer periphery of the key cylinder 12 is grounded via an electric wire, and the base end of the key cylinder 13 is connected to the electric wire 18 and the electric wire 18. Diode D1
5 is connected to the battery power supply Vcc through
The alarm generation circuit KH shown in FIG. In other words,
In the second embodiment, an electrical switch is configured by using a second anti-theft security assembly member 17 configured by a combination of a key cylinder 13 and a retainer clip 16.

The operation of the second embodiment is almost the same as the operation of the first embodiment. That is, when the thief drops the key cylinder 13 into the door by using a hammer or a screwdriver to release the retainer clip 16 from the key cylinder 13 and lose its contact state, the second anti-theft security member The ground path including 17 is disconnected from the ground.

Then, the potential at point A, which is the base potential of the first transistor Tr1, becomes "high", and then the potential at point B, which is the base potential of the second transistor Tr2, becomes "low". As a result, the current flows through the alarm device 11 and the alarm device 11 emits an alarm sound.

The technical concept described in the first and second embodiments can be applied to any type of key cylinder, such as a trunk key cylinder, in addition to an ignition key cylinder and a door key cylinder.

Furthermore, in the above-described first and second embodiments, the key cylinder has been described as an example to which the present invention is applied. However, a form in which a junction box for a starter relay is employed as an object to which the present invention is applied. This is also effective, and this embodiment will be described below as a third embodiment with reference to the drawings.

FIG. 6 is a perspective view of a junction box for a starter relay showing a main part of a vehicle anti-theft device according to a third embodiment of the present invention, and FIG. 7 is a cross-sectional view of a main part around a ground path cutoff switch. FIG. 8 is a diagram showing an alarm generation circuit KH constituting a part of the vehicle anti-theft device according to the third embodiment of the present invention. Note that the alarm generation circuit KH shown in FIG. 8 has a circuit configuration that is substantially the same as the alarm generation circuit KH described in the above-described first and second embodiments. The same reference numerals are given and the duplicated description is omitted, and the description will focus on the components that differ between the two.

In FIG. 6, 19 is a junction box, 20 is a starter relay, 21 is a switch for cutting off the ground path, 21a is a pusher, and 22 is a base.

As shown in FIGS. 6 and 7, the ground path cutoff switch 21 is provided substantially at the center of a junction box 19 mounted and fixed on a base 22, and the starter relay 20 is connected to the junction box 19.
Is mounted, the pusher 21a is pushed down by the bottom surface of the starter relay 20 against the elastic force of the spring member 19a, so that the upper contact 19b and the lower contact 19c
When the starter relay 20 is detached from the junction box 19, the spring member 19a is released, so that the contact between the upper contact 19b and the lower contact 19c is lost. It is configured. The upper contact 19b and the lower contact 19c constitute a third anti-theft security member 23.

In the third embodiment, the lower contact 19c is grounded via an electric wire, and the upper contact 19b is connected to the battery power supply V via an unillustrated electric wire and a diode D1.
By connecting to cc, the alarm generating circuit KH shown in FIG. 8 is configured. In other words, in the third embodiment, an electric switch is configured by using the third anti-theft security member 23 composed of a combination of the upper contact 19b and the lower contact 19c.

The operation of the third embodiment is almost the same as the operation of the first and second embodiments. That is, if the thief intends to illegally start the engine and removes the starter relay 20 from the junction box 19 of the vehicle to lose the contact state between the upper contact 19b and the lower contact 19c, the third anti-theft alarm system The ground path including the member 23 is separated from the ground.

Then, the potential at point A, which is the base potential of the first transistor Tr1, becomes "high", and then the potential at point B, which is the base potential of the second transistor Tr2, becomes "low". As a result, the current flows through the alarm device 11 and the alarm device 11 emits an alarm sound.

As described above, according to the vehicle antitheft devices according to the first to third embodiments, the antitheft device is incorporated in various parts of the vehicle, for example, a door key, an ignition key, a junction box for a starter relay, or the like. When a displacement of the electrical connection state between the anti-theft security members is detected, an alarm is issued assuming that theft has been performed, and therefore, despite a simple configuration and a low manufacturing cost, In addition, it is possible to obtain a vehicle anti-theft device capable of exhibiting a high antitheft effect, and it can be expected that the vehicle anti-theft device will greatly contribute to the spread of the vehicle anti-theft device.

The gist of the present invention is that the theft is detected with a simple configuration and the alarm means is driven. However, an alarm signal for driving the alarm 11 due to the theft is obtained. When the warning is issued from the alarm device 11 or at the same time, the engine start of the vehicle may be prohibited at the same time. This embodiment will be described as a fourth embodiment.

FIG. 9 is a schematic block diagram of a vehicle anti-theft device according to a fourth embodiment of the present invention.

As shown in the figure, the state of electrical connection between the anti-theft alarm assembly members interposed in the path in the alarm generation circuit KH in the first to third embodiments is constantly monitored, and When an alarm signal S _KH for driving the alarm device 32 is transmitted from the theft detection means 31 configured to detect the displacement of the electrical connection state between the alarm assembly members, the alarm signal is used by the alarm signal S _KH . 32 and the power supply breaker 33, the switch 34 is forcibly opened by the power supply breaker 33, and the starter relay 35
By shutting off the battery power supply Vcc applied to the power supply, the engine start can be prohibited.

It is needless to say that the present invention is not limited to the above-described embodiment, but can be embodied in an appropriately modified form within the scope of the claims.

[0050]

According to the first aspect of the present invention, the drive control means is provided between the conductive anti-theft security members incorporated in various parts of the vehicle, for example, a door key, an ignition key, or a junction box for a starter relay. When the displacement of the electrical connection state is detected, the alarm means is driven on the assumption that the theft has been acted on. Therefore, despite the simple configuration and the low manufacturing cost, the cost is high. It is possible to obtain a vehicle anti-theft device capable of exhibiting the anti-theft effect, and it can be expected to make a great contribution to the spread of the vehicle anti-theft device.

According to the second aspect of the present invention, the conductive member constituting a part of the key cylinder and the conductive spring member are disposed between the conductive member and the conductive member due to theft such as destruction of the key cylinder by a thief. When the contact state is lost, the displacement of the electrical connection state between the anti-theft security assembly members is detected, and as a result that the alarm means is driven on the assumption that the theft has been performed, the alarm means is driven. Similarly to the invention of the above, it is possible to obtain a vehicle anti-theft device capable of exhibiting a high anti-theft effect with a simple configuration and at a low manufacturing cost, and to spread the vehicle anti-theft device. We can expect to make a great contribution.

Further, according to the third aspect of the present invention, due to a theft such as destruction of the key cylinder by a thief, the fitting between the cylinder knob provided in the key cylinder and the conductive spring member is performed. When the contact state is lost, the displacement of the electrical connection state between the anti-theft security assembly members is detected, and as a result that the alarm means is driven on the assumption that the theft has been performed, the alarm means is driven. Or, similarly to the invention of the second aspect, it is possible to obtain a vehicle anti-theft device capable of exhibiting a high anti-theft effect with a simple configuration and at a low manufacturing cost, and to provide a vehicle anti-theft device. We can expect to make a great contribution to the spread.

Further, according to the invention of claim 4, when the thief attempts to illegally start the engine and removes the starter relay from the junction box of the vehicle, the displacement of the electrical connection between the anti-theft security members is changed. Is detected, and the alarm means is driven assuming that the theft has been acted on. As a result, similar to the first to third aspects of the present invention, despite the simple configuration and the low manufacturing cost, In addition, it is possible to obtain a vehicle anti-theft device capable of exhibiting a high antitheft effect, and it can be expected that the vehicle anti-theft device will greatly contribute to the spread of the vehicle anti-theft device.

According to the fifth aspect of the present invention, when the displacement of the electrical connection state between the anti-theft security members is detected, the drive control means determines that theft has been acted on and the start inhibiting means. Therefore, it is possible to obtain a vehicle anti-theft device having a simple configuration and a high anti-theft effect despite its low manufacturing cost, as in the first to fourth aspects of the present invention. In addition to the above, it is possible to expect that a great contribution to the spread of the vehicle anti-theft device can be expected.

[Brief description of the drawings]

FIG. 1 is a perspective view of a key cylinder representing a main part of a vehicle anti-theft device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the key cylinder shown in FIG. 1 with a part cut away.

FIG. 3 is a diagram illustrating an alarm generation circuit that forms a part of the vehicle anti-theft device according to the first embodiment of the present invention.

FIG. 4 is an exploded perspective view of a door knob representing a main part of a vehicle anti-theft device according to a second embodiment of the present invention as viewed from the back side thereof.

FIG. 5 is a diagram showing an alarm generation circuit KH constituting a part of a vehicle anti-theft device according to a second embodiment of the present invention.

FIG. 6 is a perspective view of a junction box for a starter relay showing a main part of a vehicle antitheft device according to a third embodiment of the present invention.

FIG. 7 is a cross-sectional view of a main part around a ground path cutoff switch;

FIG. 8 is a diagram showing an alarm generation circuit KH which forms a part of a vehicle antitheft device according to a third embodiment of the present invention.

FIG. 9 is a schematic block diagram of a vehicle antitheft device according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Key cylinder for ignition key 2 Ignition switch 3 Locking claw 4 Side part of ignition switch 5 Cylinder knob 6 Through-hole for insertion of cylinder knob 7 Contact 8 Electric wire 9 Steering shaft 10 First anti-theft security member 11 Alarm (alarm) Means) 12 Door knob 13 Key cylinder 14 Cylinder case 15 Cylinder switch 16 Retainer clip 17 Second anti-theft security member 18 Electric wire 19 Junction box 19a Spring member 19b Upper contact 19c Lower contact 20 Starter relay 21 Switch for grounding path 21a Pusher Reference Signs List 22 base 23 third anti-theft alarm assembly member 31 theft detection means 32 alarm device 33 power supply breaker 34 switch 35 starter relay D1 diode KH alarm generation circuit (drive control means) Tr1 1 of the transistor Tr2 second transistor R1~R6 resistance

Claims (5)

[Claims] 1. An anti-theft device for a vehicle configured to prevent theft of a vehicle, wherein the antitheft device is incorporated in various parts of the vehicle so as to displace an electrical connection between the two due to a theft act. A conductive anti-theft alarm member, an alarm means for issuing an alarm, and when a displacement of an electrical connection state between the anti-theft alarm members is detected, the alarm means is deemed to have acted as a theft act. An anti-theft device for a vehicle, comprising: a driving control means for driving; 2. The burglar alarm member comprises a conductive member constituting a part of a key cylinder into which a key is inserted, and a conductive spring member abutting on the conductive member. The vehicle anti-theft device according to claim 1. 3. A conductive member forming a part of the key cylinder is a cylinder knob provided in the key cylinder, and a conductive spring member abutting on the conductive member is fitted on the cylinder knob. The anti-theft device for a vehicle according to claim 2, wherein the abutment is performed so as to make contact. 4. The anti-theft alarm assembly member is incorporated in the junction box so that when a starter relay is removed from the junction box of the vehicle, an electrical connection between the two is displaced. The vehicle anti-theft device according to claim 1. 5. The vehicle according to claim 1, further comprising a start prohibition unit for prohibiting an engine start of the vehicle, wherein the drive control unit performs a theft act when a displacement of an electrical connection state between the anti-theft security members is detected. The anti-theft device for a vehicle according to any one of claims 1 to 4, wherein the start prohibiting means is driven assuming that the vehicle has been driven.