Antitheft device and antitheft method

• US 20050012601A1
• Filed: 07/09/2004
• Published: 01/20/2005
• Est. Priority Date: 07/11/2003
• Status: Active Grant

• Current Assignee: Fujitsu Ten Limited (DENSO Corporation)
• Original Assignee: Fujitsu Ten Limited (DENSO Corporation)
• Inventors: Matsubara, Manabu, Yoshimura, Minoru
• Granted Patent: US 7,132,929 B2
• Time in Patent Office: Days
• US Class Current: 340/426.100
• CPC Class Codes: B60R 25/1003 Alarm systems characterised by arm or disarm features
• CPC Class Codes: B60R 25/104 characterised by the type of theft warning signal, e.g. visual or audible signals with special characteristics

Abstract

The present invention teaches an antitheft device whereby an arming mode can be appropriately set when a remote operation for instructing to start an engine is conducted, comprising a section for setting the arming mode when a time T1 (e.g. 20-30 seconds) elapsed after receiving a door locking operation and a section for setting the arming mode when a time T2 (e.g. 2 seconds), being shorter than the time T1, elapsed after receiving a remote operation for instructing to start the engine.

Claims

1. An antitheft device, comprising:

a first judgment section for judging whether a first predetermined condition for setting an arming mode has been met when receiving a prescribed operation by a user;

a first setter for setting the arming mode when it is judged that the first predetermined condition has been met by the first judgment section;

a second judgment section for judging whether a second predetermined condition for setting the arming mode has been met when receiving a remote operation for instructing to start an engine by the user; and

a second setter for setting the arming mode when it is judged that the second predetermined condition has been met by the second judgment section, wherein;

the first predetermined condition and the second predetermined condition are different.

2. An antitheft device according to claim 1, wherein:

the first predetermined condition includes an elapse of a first preset time after receiving the prescribed operation;

the second predetermined condition includes an elapse of a second preset time after receiving an engine start command by remote operation; and

the second preset time is shorter than the first preset time.

3. An antitheft device according to claim 2, wherein:

the second preset time is almost 0 second; and

the second setter sets the arming mode as soon as receiving the remote operation for instructing to start the engine by the user.

4. An antitheft device according to claim 1, wherein:

the first predetermined condition includes that a trunk lid is closed;

whereas

the second predetermined condition does not include that the trunk lid is closed.

11. An antitheft device according to claim 1, comprising a starter for starting an engine of a vehicle when receiving the remote operation for instructing to start the engine by the user.

5. An antitheft device, comprising:

a first judgment section for judging whether a first predetermined condition for setting an arming mode has been met when receiving a prescribed operation by a user;

a first setter for setting the arming mode when it is judged that the first predetermined condition has been met by the first judgment section;

a second judgment section for judging whether a second predetermined condition for setting the arming mode has been met when receiving a remote operation for instructing to start an engine by the user; and

a second setter for setting the arming mode when it is judged that the second predetermined condition has been met by the second judgment section, wherein;

an alert status in the arming mode being set by the first setter and an alert status in the arming mode being set by the second setter are different.

6. An antitheft device according to claim 5, wherein:

detected subjects for detecting an unauthorized action in the arming mode being set by the second setter are reduced, compared with detected subjects for detecting an unauthorized action in the arming mode being set by the first setter.

7. An antitheft device according to claim 6, wherein:

the opening of the trunk lid is excluded from the detected subjects in the arming mode being set by the second setter.

8. An antitheft device according to claim 5, wherein:

the detection sensitivity for detecting an unauthorized action in the arming mode being set by the second setter is set lower than the detection sensitivity for detecting the unauthorized action in the arming mode being set by the first setter.

9. An antitheft device according to claim 5, comprising:

a third judgment section for judging whether a third predetermined condition has been met in a case where the arming mode by the second setter has been set; and

an alert status setting section for setting an alert status in the arming mode to be the same as the alert status in the arming mode being set by the first setter when it is judged that the third predetermined condition has been met by the third judgment section, wherein;

the third predetermined condition includes a stop of the engine.

10. An antitheft device according to claim 5, wherein:

the first predetermined condition and the second predetermined condition are different.

12. An antitheft device, comprising:

a receiving section receiving a signal transmitted from a transmitter; and

a microcomputer, operatively connected to the receiving section, generating an alarm when a predetermined status is detected and controlling a start of an engine in response to a signal instructing the start of the engine transmitted from the transmitter, wherein;

the microcomputer sets an arming mode after a first delay time in response to a signal instructing to set the arming mode transmitted from the transmitter, and sets the arming mode after a second delay time, being shorter than the first delay time, in response to the signal instructing the start of the engine transmitted from the transmitter.

13. An antitheft method, comprising the steps of:

setting an arming mode when a first preset time elapsed after receiving a prescribed operation by a user; and

setting the arming mode when a second preset time, being shorter than the first preset time, elapsed after receiving a remote operation for instructing to start an engine by the user.