JPS62137375A - Release controller for car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to an automatic vehicle unlocking device in which a locking mechanism of a vehicle locking portion is automatically unlocked by inputting a code.

(Background of the Invention) This type of device is known from Japanese Patent Application Laid-Open No. 59-24075, and an example of the conventional device is shown in FIG.

The code input device 10 in the figure is a keyboard or a receiver (
The input code is provided to the microcomputer 14 as an unlocking code.

A vehicle-specific code is stored in advance in the memory 16, and the microcomputer 14 confirms that the vehicle-specific code and the input code match.

When it is confirmed that the two codes match, the microcomputer 14 gives an unlocking command to the drive circuit 18, and the actuator 20 that unlocks the locking mechanism of the vehicle locking part is driven by the drive circuit 18. ing.

Note that it is also possible to manually unlock the vehicle locked portion using the key 24.

Therefore, the drive circuit and actuator 20 are housed in a rigid case 22, which prevents the vehicle from being stolen.

However, in this conventional device, since the wiring between the microcomputer 14 and the drive circuit 18 is exposed outside the hard case 22, the lock can be unlocked by connecting a power source to the drive circuit 18 and driving the actuator. Therefore, there was a problem in that vehicle theft could not be completely prevented.

(Object of the invention) The present invention has been made in view of the above-mentioned conventional problems,
The aim is to provide a device of this type that can completely prevent vehicle theft.

(Structure of the Invention) In order to achieve the above object, the present invention, as shown in FIG. The rewriting prohibition means for prohibiting rewriting of the code includes a code matching confirmation means C for confirming the match between the input code and the vehicle-specific code, and a code match confirmation means C for confirming the match between the input code and the vehicle-specific code, and a code match confirmation means C for confirming the match between the two codes, and a locking mechanism of the vehicle locking part when the match between the two codes is confirmed. Actuator d for unlocking, code storage means b, rewrite prohibition means C, code matching T
It is characterized by having the following: a solid case f for storing an il recognition means d and an actuator e@.

(Description of Embodiments) Hereinafter, preferred embodiments of the apparatus according to the present invention will be described based on the drawings.

In FIG. 3, in this embodiment, a microcombination 1-14, a memory 16, a drive circuit 18, an actuator 20
is housed in a rigid case 22.

FIG. 4 shows the structure of the rigid case 22, and the rigid case 22 is inserted into the case 26 from the outside. Rotary subcase 28. It has a triple structure of cylinders 30.

And those cases 26. The rotary subcase 28 and the cylinder 30 are coaxial, and a pin tumbler 32 is provided between the case 26 and the rotary subcase 28, and a disc tumbler 34 is provided between the rotary subcase 28 and the cylinder 30. There is.

As can be roughly understood from FIG. 5, the case 26 is embedded and fixed in the steering column 36, and when locked, the case 26 and the rotary sub-case 2
8 and cylinder 30 are not allowed to rotate.

Further, a key 24 is inserted into the key hole 38 of the cylinder 30 as shown in FIG. The cylinder 30 can be rotated relative to the case 28.

When the key 24 is rotated, the lock release shaft 40 connected to the cylinder 30 in FIG. The locking rod is retracted from the lock hole formed in 42, and the steering shaft 42 is unlocked.

As described above, it is possible to unlock the steering shaft 42 by manually operating the key 24. Note that the ignition switch is turned on by further rotating the key 24.

In FIG. 4, the pin tumbler 32 is placed inside the case 26.
An actuator 20 is embedded outside the rotary subcase 28, and the pin tumbler 32 is retracted from the rotary subcase 28 by driving the actuator 20.

As a result, together with the cylinder 30, the rotary subcase 2
8 can be rotated relative to the case 26, and the steering shaft 42 can be rotated by rotating the lower case 28.
is unlocked and the ignition switch is turned on.

The microcomputer 14 and the memory 16 shown in FIG. The electronic components constituting the drive circuit 18 are mounted on a board 44 placed inside the case 26 in FIG. 4, and the board 44 is connected to the actuator 2Q by an electric wire 46.
They are each connected to the outside by electric wires 48.

The case 26 is made of a very strong material such as zinc die-casting, and if the case 26 is destroyed, the rotary sub-case 2B and the cylinder 30 will become unrotatable, making it impossible to unlock.

In this way, the solid case 22 has a theft-proof structure, and the board 44 housed inside cannot be replaced or modified, so the theft of the vehicle is completely prevented.

Here, the memory 16 on the board 44 is a fuse RO.
M is used, and no writing is performed in the memory 16 when it is installed into the case 26.

Writing of the vehicle-specific code into the memory 16 is performed by the microcomputer 14 after the device is assembled, and the code is given to the microcomputer 14 from the code input device @10. In this embodiment, a receiver is used as the code input device 10, and the code is transmitted from a portable radio carried by the driver.

A transistor 50 is provided on the substrate 44 in FIG. 6, and the transistor 50 is driven by the output of the output terminal P1 of the microcomputer 14.

Its emitter is grounded via fuse 52,
A fuse blowing voltage VB is applied to the collector of the transistor 50.
is given.

Roughly speaking, the emitter voltage of the transistor 50 is applied to the blowout detection input terminal P2 of the microcomputer 14, and the microcomputer 14 uses this voltage for processing.

FIG. 7 shows a flow chart of the processing procedure of the microcomputer 14. First, a code input from the code input device 10 is read (step 100).

Then, it is determined whether or not the fuse 52 is blown from the input voltage of the terminal P2 (emitter voltage of the transistor 50) (step 102>, it is determined that the fuse 52 is not blown, and the code is stored in the memory 16. If writing has not yet taken place, the input code is written into memory 16 one bit at a time (step 104).

Thereafter, when it is confirmed that all bits of the input code have been written (step 106), the transistor 50 is turned on by the signal at the output terminal P1, and the fuse 52 is blown (step 108).

As described above, a code given from the outside is written into the memory 16 for the first time after the device is assembled as a vehicle-specific code, and the code registration is performed by the vehicle purchaser or by the vehicle dealer in response to the vehicle purchaser's request. .

The microcomputer 14 functions as a ROM writer for writing, and the fuse 52 is blown when the writing is completed.

As a result, rewriting of the memory 16 becomes impossible.

After that, when a code is input to the microcomputer 14 from the code input device ``O'' to unlock the steering wheel,
From the blowing of the fuse 52, it is determined that the vehicle-specific code has been registered, and the input code is compared with the registered code in the memory 16 (step 110).

At this time, if it is determined that the two codes do not match (a negative determination is made in step 112), the actuator 20 is not driven and the steering shaft 42 is not unlocked or locked; When the codes match (affirmative determination in step 112), the actuator 20 is driven to unlock or lock the steering shaft 42 (step 114).

As described above, according to this embodiment, the microcomputer 14 is housed within the sturdy case 22 which has an anti-theft structure. Memory 16. Drive circuit 18. Since the actuator 20 is housed, the wiring between them will not be exposed from the solid case 22, making it possible to completely prevent the vehicle from being stolen.

In particular, according to this embodiment, the memory 16 built into the rigid case 22 is a fuse ROM, and any code can be written to the memory 16 only once after the device is assembled. It becomes easier to manage the code all the way to the store, and the manufacturing process of the device is simplified, making it possible to significantly reduce the manufacturing cost of the device.

Since roughly any code can be written and registered in the memory 16, it is possible to register the code in accordance with the request of the vehicle user, and therefore it is possible to improve the marketability of the device. Further, there is no need to provide a function for setting a ready-made unique code on the portable radio device side, which facilitates miniaturization of the portable radio device.

In this embodiment, since a fuse ROM is used as the memory 16, a backup power source is not required and the stored contents can be reliably retained.

It is also possible to use battery-backed RAM instead, in which case the RAM
Preferably, the device is configured to programmatically prohibit rewriting of the data.

(Effects of the Invention) As explained above, according to the present invention, the code storage means for registering vehicle-specific codes is housed in a rigid case together with the actuator for unlocking, and the code storage means cannot be rewritten. Since this is prohibited, it is possible to significantly reduce the manufacturing cost of the device while reliably preventing vehicle theft, and it is also possible to improve the marketability of the device.

If the unlocking operation is performed using a radio,
There is no need to add functions such as setting a ready-made unique code to the radio, and therefore it becomes easy to miniaturize the radio.

[Brief explanation of drawings]

Fig. 1 is a diagram corresponding to claims, Fig. 2 is an explanatory diagram of the configuration of the conventional device, Fig. 3 is an explanatory diagram of the configuration of the device according to the present invention, Fig. 4 is an explanatory diagram of the internal structure of the rigid case, and Fig. 5 is a diagram of the rigid case. FIG. 6 is a diagram illustrating the connection relationship between the microcomputer and memory, and FIG. 7 is a flowchart illustrating the processing procedure of the microcomputer. a...Code input means b...Code storage means C...Rewriting prohibited"J'-J role d...Code matching confirmation means e...Actuator f...Rigid case 10... Code input device 14...Microcomputer 16...Memory 18...Drive circuit 20...Actuator 22...Rigid case 26...Case 28...Rotary subcase 30...Cylinder 32... ...Pin tumbler 34...Disc tumbler 40...Lock/unlock shaft 50...Transistor 52...Fuse patent applicant Nissan Motor Co., Ltd. -1=-1- Figure 2 Figure 3 Figure 22 (Hard case J Figure 6

Claims (2)

[Claims] (1) A code storage means in which the input code is written as a vehicle-specific code, a rewrite prohibition means for prohibiting rewriting of the code storage means, and a code match confirmation means for checking the match between the input code and the vehicle-specific code. and an actuator that unlocks a locking mechanism of a vehicle locking part when a match between the two codes is confirmed, and a solid case that houses the code storage means, rewrite prohibition means, code match confirmation means, and the actuator. A vehicle unlocking control device comprising: (2) The unlocking control device for a vehicle according to claim 1, wherein the solid case is a case with an anti-theft structure that houses a locking mechanism.