JP2008101403A - Keyless entry device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyless entry device which can positively prevent portable machines from being confined in a trunk. <P>SOLUTION: The keyless entry device is formed of: an in-vehicle device 2 which is arranged in a vehicle with a trunk door, and provided with a control section 10; and the plurality of portable machines 5 for radio-communicating to and from the in-vehicle device. The control section detects the number of the portable machines present in the vehicle when locking/unlocking control of a door is carried out based on a locking signal from the portable machine to store the number in a memory 11 as a prior number, and stores an identification sign of the portable machine which has transmitted the locking signal, in the memory. Thereafter when the trunk door is closed, the control section detects the number of the portable machines present in the vehicle to store a detection result as a determined number, and stores an identification sign of the portable machine present in the vehicle is stored. If the determined number is larger than the prior number or the prior number is equal to the determined number and at the same time the portable machine which has transmitted the locking signal is present in the vehicle, the trunk door is controlled to be opened. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a keyless entry device that locks and unlocks a door by performing wireless communication between a portable device and a vehicle-side device, and particularly to prevent containment when the portable device is misplaced in a trunk room of a vehicle. In particular, the present invention relates to a control method for the keyless entry device.

  In a keyless entry device, a vehicle-side device is provided in a vehicle such as an automobile, and wireless communication is performed with a portable device carried by the driver so that the door is locked / unlocked when authentication is established. ing. A plurality of portable devices are prepared for one vehicle. Of these, the door is locked when wireless communication is no longer established between the transmitting antenna provided on the outside of the vehicle and the portable device. This is because the user with the portable device leaves the vehicle. The case is assumed.

Here, when locking is performed only when wireless communication is not established between the transmitting antenna provided on the outside of the vehicle and the portable device, the portable device is left in the passenger compartment where the occupant gets in and gets off the vehicle. In other cases, the portable device may be trapped in the passenger compartment. For this reason, a keyless entry device that is provided with a detection unit that detects opening and closing of a door and determines whether or not to lock according to the opening and closing operation of the door is known as disclosed in, for example, Patent Document 1.
JP 2003-20836 A

  Further, in a vehicle having a trunk room that is independent of the passenger compartment at the rear, the door is automatically locked when the trunk door is closed, and thus there is a possibility that the portable device may be enclosed in the trunk room. Therefore, it is necessary to prevent this. For this reason, in the conventional keyless entry device, when all the doors of the compartment are closed and locked by the portable device, the number of portable devices in the vehicle including the compartment and the trunk room is communicated with each portable device. If the trunk door is changed from the open state to the closed state, the number of portable devices in the car is counted again. The trunk room is controlled to open as if the portable device was confined in the trunk room. As a result, even if the user goes out of the vehicle to lock the passenger compartment door, and then places the portable device used for the locking operation in the trunk room and closes the trunk door, the trunk door opens. Can be prevented from being trapped in the trunk room. Note that the number is the same in normal use when the portable device is not put in the trunk room, and the number decreases when the portable device that was in the trunk room is taken out. I try to lock it.

  However, the conventional keyless entry device cannot prevent the portable device from being locked in the following cases. First, with the trunk door opened, the door of the passenger compartment is locked by the portable device located in the trunk room, the portable device is placed in the trunk room as it is, and the trunk door is closed. In that case, since the number of prior doors when locked and the number of doors when the trunk door is closed are the same, even if the portable device is left behind in the trunk room, the opening operation control of the trunk door is not performed. Note that this can also occur when the portable device is not in the trunk room. That is, even if the portable device is not in the trunk room when counting in advance, if there is a portable device in the vicinity with the trunk door open, the portable device may be It may be determined that the vehicle is in the vehicle, and even in that case, the portable device cannot be prevented from being locked.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a keyless entry device that can more reliably prevent a portable device from being trapped in a trunk room.

In order to solve the above problems, a keyless entry device according to the present invention is provided with a vehicle-side device provided in a vehicle having a lockable compartment door and a trunk door, and a unique identification code. A plurality of portable devices that wirelessly communicate with the vehicle side device, and the vehicle side device includes a control unit that controls locking and unlocking of the compartment door and locking and unlocking of the trunk door. In the device
The control unit detects the number of portable devices that are determined to be present in the vehicle including the vehicle compartment and the trunk room when lock control of the vehicle compartment door is performed based on a lock signal from the portable device. And storing the identification number of the portable device that has transmitted the locking signal, and then determining the number of portable devices that are determined to be present in the vehicle when the trunk door is closed as the determination number And detecting the identification code of the portable device existing in the vehicle, and when the determination number is larger than the previous number or when the determination number is the same as the previous number and the lock signal is transmitted In both cases where it is determined that a machine is present in the vehicle, the trunk door is controlled to be unlocked.

  In the keyless entry device according to the present invention, a plurality of lockable compartment doors are provided in the vehicle, and the open / close state can be detected by the control unit. Instead of when the door locking control is performed based on the locking signal from the portable device, the doors of all the vehicle compartments are opened after any of the vehicle compartment doors is opened. Is configured to detect that the closed state is detected.

  Further, in the keyless entry device according to the present invention, the vehicle includes a transmission antenna inside the vehicle, and the control unit determines that the portable device that has received a signal from the transmission antenna inside the vehicle is present in the vehicle. It is structured as a feature.

  According to the keyless entry device according to the present invention, when the door locking control is performed based on the locking signal from the portable device, the number of portable devices present in the vehicle is detected and stored as a prior number, and the locking signal Is stored, and when the trunk door is subsequently closed, the number of portable devices present in the vehicle is detected and stored as a judgment number, and the portable device present in the vehicle is identified. If the number of judgments is greater than the number of priors, or if the number of judgments is equal to the number of priors and there is a portable device that has sent a lock signal, the trunk door is controlled to open. Even when the number in advance and the number of determination are the same, it is possible to reliably determine whether the portable device is trapped in the trunk room.

  In addition, according to the keyless entry device according to the present invention, when the prior number is detected, instead of when the door locking control is performed based on the locking signal from the portable device, one of the doors is in an open state. When it is detected that all doors have been closed after becoming the same, it is possible to reliably determine whether the portable device is confined to the trunk room even when the number of priors and the number of determinations are the same. .

  Furthermore, according to the keyless entry device according to the present invention, the vehicle includes a transmission antenna on the inside of the vehicle, and the control unit determines that the portable device that has received the signal from the transmission antenna on the inside of the vehicle is present in the vehicle, It is possible to easily detect whether or not the portable device exists in the vehicle.

  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic diagram of a keyless entry device according to this embodiment. As shown in this figure, the keyless entry device according to the present embodiment includes a vehicle-side device 2 provided in a vehicle 1 having a trunk room 1a having an openable / closable trunk door 1c, and a vehicle 1 connected to the vehicle-side device 2. The transmission antenna 3 is arranged at each place, the reception antenna 4 is connected to the vehicle-side device 2 and is arranged on the vehicle 1, and the portable device 5 carried by the driver. As a result, the keyless entry device performs wireless communication between the portable device 5 and the vehicle-side device 2 when the driver approaches or leaves the vehicle 1 while carrying the portable device 5. It has a so-called passive function for automatically locking and unlocking. Further, it has a so-called active function by operating a switch 6 provided in the portable device 5.

  A plurality of portable devices 5 are prepared for one vehicle 1, and each portable device 5 is given a unique identification code. In the communication between the portable device 5 and the vehicle side device 2, by including this identification code in the signal, the vehicle side device 2 authenticates the portable device 5 and identifies which portable device 5 is communicating with. can do.

  A plurality of transmission antennas 3 are provided inside and outside the vehicle 1. The antenna provided inside transmits the signal only to the vicinity of the inside of the vehicle 1, and the antenna provided outside is the outside of the vehicle 1. The signal is transmitted only to the vicinity of the. When the vehicle-side device 2 communicates with the portable device 5, radio waves whose signals are modulated are transmitted as request signals from all the transmission antennas 3, and the portable device 5 transmits the radio waves from any transmission antenna 3. Determine if received. Regarding the identification of the transmission antenna 3 in the portable device 5, when transmitting a signal from the vehicle side device 2, the signal received on the portable device 5 side is transmitted by including an individual code for each transmission antenna 3. Can be identified. And the information of the identified antenna 3 can be transmitted to the vehicle side device 2 as an answer signal, and the transmission antenna received by the portable device 5 can be identified on the vehicle side. In the above example, the antenna 3 is identified by including an individual code. However, as soon as the portable device 5 receives the request signal, an answer signal is sent back, and each antenna is transmitted with a time interval. For example, the transmission antenna received by the portable device 5 can be identified by the reception timing of the answer signal from the portable device 5.

  Whether the portable device 5 is inside or outside the vehicle 1 is determined as follows based on detection of the transmission antenna 3 in the portable device 5. When the portable device 5 detects that the radio wave from the transmission antenna 3 provided inside the vehicle 1 is received, the vehicle-side device 2 determines that the portable device 5 is in the vehicle, and the portable device 5 When it is detected that the radio wave is received from the transmitting antenna 3 provided in the vehicle-side device 2, the vehicle-side device 2 determines that the portable device 5 is outside the vehicle.

  FIG. 2 shows a block diagram of the keyless entry device in the present embodiment. As shown in this figure, the vehicle side device 2 transmits a radio wave in which a signal is modulated to each transmission antenna 3, a control unit 10 that controls each unit, a memory 11 that stores an identification code of the portable device 3, and the like. A transmission unit 12 to be output, a reception unit 13 that outputs a radio wave received by the reception antenna 4 to the control unit 10 as a signal, a door detection unit 14 that detects an open / closed state of a compartment door of the vehicle 1, and a trunk of the vehicle 1 A trunk door detection unit 15 that detects the open / closed state of the door 1c, a lock drive unit 16 that locks / unlocks the compartment door, and a trunk drive unit 17 that opens by unlocking the trunk door 1c. And.

  The portable device 5 includes a portable device control unit 20 that performs various controls when receiving a signal from the vehicle side device 2, a portable device reception unit 21 that receives a signal from the vehicle side device 2, and the vehicle side device 2. In contrast, a portable device transmission unit 22 that transmits a signal and a memory 23 that stores an identification code set in the device itself are provided. In addition, an antenna 24 that transmits and receives signals is connected to the portable device receiver 21 and the portable device transmitter 22. Further, the portable device 5 is provided with a switch 6 that allows the door of the vehicle compartment to be locked and unlocked by an operator.

  The portable device control unit 20 switches from the sleep state where the power consumption is substantially zero to the normal state by the wake-up signal included in the signal from the vehicle-side device 2 received by the portable device reception unit 21. In addition, the portable device control unit 20 performs various operations based on commands included in the signal from the vehicle side device 2.

  Next, an operation for preventing confinement when the portable device 5 is left in the trunk room 1a will be described. FIG. 3 is a schematic diagram showing the positional relationship between the vehicle 1 and the portable device 5. Here, in order to distinguish the portable devices 5 from each other, the two portable devices 5 are shown as a portable device 5a and a portable device 5b. As shown in FIG. 3 (a), a vehicle compartment 1b and a trunk room 1a are independently arranged in a region inside the vehicle 1, and in the case of FIG. 3, the vehicle compartment 1b is carried in the vehicle compartment 1b. It is assumed that the user goes out of the vehicle with another portable device 5b with the device 5a left in place.

  In this case, as shown in FIG. 3A, when a signal is transmitted from the portable device 5b to the vehicle-side device 2 by operating the switch 6 of the portable device 5b in a state where the portable device 5b is outside the vehicle, The control unit 10 of the device 2 causes the lock driving unit 16 to lock the door after detecting that the doors are all closed by the door detection unit 14. Further, the identification code of the portable device 5 communicated at the time of locking is also stored in the memory 11. At the same time, the control unit 10 of the vehicle-side device 2 transmits radio waves from the transmission antenna 3 arranged in the vehicle, detects the number of portable devices 5 to which an answer signal has been returned, and stores it in the memory 11. Keep it. The number of portable devices 5 at this time is used as a prior number and compared with the number of portable devices 5 in the vehicle when the trunk door 1c is closed to determine whether the portable device 5 is confined. In the case of FIG. 3A, since the portable device 5a is in the vehicle, the control unit 10 of the vehicle side device 2 can recognize that the prior number is one.

  Subsequently, as shown in FIG. 3 (b), it is assumed that the trunk door 1c is opened and the portable device 5b is placed in the trunk room 1a together with luggage. Further, as shown in FIG. 3 (c), when the trunk door 1c is closed while the portable device 5 is placed in the trunk room 1a, both the portable device 5a and the portable device 5b are confined in the vehicle. become. Therefore, when the trunk door detection unit 15 detects that the trunk door 1c is closed, the control unit 10 of the vehicle side device 2 transmits a request radio wave from the transmission antenna 3 arranged in the vehicle, and the portable device 5 Transmits an answer signal including its own ID, and therefore detects the number of mobile devices 5 that have reacted (the number of discrimination) and their identification codes. Then, the prior number stored in the memory 11 is compared with the determined number. If the determined number is larger, it is determined that confinement has occurred. When the control unit 10 of the vehicle side device 2 determines that the confinement has occurred, the control unit 10 controls the trunk drive unit 17 to unlock the trunk door 1c, and unlocking is performed in this embodiment. Therefore, the trunk door 1c is opened. In FIG.3 (c), since the number of the portable devices 5 in a vehicle is two, the portable device 5a and the portable device 5b, and more than one which is a prior number, the control part 10 of the vehicle side apparatus 2 is Judge that confinement has occurred.

  FIG. 3 shows a case where the number of discrimination is greater than the prior number, but when these are the same, discrimination is performed as follows. FIG. 4 is a schematic diagram showing a positional relationship between the vehicle 1 and the portable device 5 and different from FIG. 3.

  FIG. 4 (a) shows that after the user with the portable device 5b gets out of the vehicle, the trunk door 1c is opened to put the portable device 5b into the trunk room 1a, or the portable device 5b The switch 6 is operated and a signal is transmitted to the vehicle side device 2, and the door is locked. At this time, as described above, the control unit 10 of the vehicle-side device 2 stores the identification code of the portable device 5 communicated at the time of locking in the memory 11 and then transmits radio waves from the transmission antenna 3 disposed in the vehicle. Then, the number of portable devices 5 that have responded to the detected number is detected and stored in the memory 11. In the case of FIG. 4A, since the portable device 5a and the portable device 5b are in the vehicle, the control unit 10 of the vehicle-side device 2 can recognize that the prior number is two.

  Subsequently, as shown in FIG. 4B, when the trunk door 1c is closed while the portable device 5b is placed in the trunk room 1a, the control unit 10 of the vehicle side device 2 transmits the transmission antenna disposed in the vehicle. The radio wave is transmitted from 3, and the number (discrimination number) and identification code of the portable device 5 that reacts to the radio wave are detected. In FIG.4 (b), the number of the portable devices 5 in a vehicle is two, the portable device 5a and the portable device 5b, and is the same number as two which is a prior number.

  In this case, in the conventional example, the determination of confinement cannot be made as described above. However, in the present embodiment, the control unit 10 of the vehicle-side device 2 compares the identification code of the portable device 5 in the vehicle with the identification code stored in the memory 11, and the portable device 5 that communicated at the time of locking is If it is in the car, it is determined that confinement has occurred. In FIG. 4B, since the portable device 5b in the vehicle communicates when locked, the control unit 10 of the vehicle side device 2 determines that the confinement has occurred.

  On the other hand, when the number of discriminating pieces is equal to the number of prior pieces and the portable device 5 communicated at the time of locking is not in the vehicle, the control unit 10 of the vehicle-side device 2 is assumed that no confinement has occurred. to decide. FIG. 5 shows a diagram showing the positional relationship between the vehicle 1 and the portable device 5 in that case.

  FIG. 5A shows that after the user with the portable device 5b goes out of the vehicle, communication is performed between the vehicle side device 2 and the portable device 5b with the portable device 5b outside the vehicle. This shows a state where the lock is performed. At this time, as described above, the control unit 10 of the vehicle-side device 2 stores the identification code of the portable device 5 communicated at the time of locking in the memory 11 and transmits radio waves from the transmission antenna 3 arranged in the vehicle. The number of portable devices 5 that have responded to the detected number is detected as a prior number and stored in the memory 11. In the case of FIG. 5A, since the portable device 5a is in the vehicle, the control unit 10 of the vehicle side device 2 can recognize that the prior number is one.

  Subsequently, as shown in FIG. 5B, when the trunk door 1c is opened and then closed while the portable device 5b is outside the vehicle, the control unit 10 of the vehicle side device 2 is disposed inside the vehicle. Radio waves are transmitted from the transmitting antenna 3, and the number (discrimination number) and identification codes of the portable devices 5 that have reacted to it are detected. In FIG.5 (b), the number of the portable devices 5 in a vehicle is only one of the portable devices 5a, and is the same number as one which is a prior number.

  The control unit 10 of the vehicle side device 2 further compares the identification code of the portable device 5 in the vehicle with the identification code stored in the memory 11, and the portable device 5 communicated when the portable device 5 in the vehicle is locked. It is determined whether or not. In the case of FIG. 5B, the portable device 5b communicated at the time of locking, and the portable device 5a is in the vehicle. Therefore, the portable device 5b communicated at the time of locking is not in the vehicle. It is determined that no confinement has occurred.

  As described above, when the number of determinations and the number of priors are the same, it is determined whether or not the portable device 5 is confined depending on whether or not the portable device 5 communicated at the time of locking is in the vehicle. As a result, the presence or absence of confinement can be accurately determined particularly in the case of FIG. When the number of discriminating items is smaller than the number in advance, it can be determined that the portable device 5 in the trunk room 1a when locked is taken out when the trunk door 1c is closed. Since it can enter into the compartment 1b, it is determined that no containment has occurred. That is, basically, any portable device 5 can unlock the door of the compartment 1b, so that it can be carried when the door of the compartment 1b is locked and when the trunk door 1c is closed. The determination of containment may be made by looking at the increase / decrease in the number of the machines 5, but in the present invention, it is possible to eliminate the determination error in the case of the same number.

  Next, a flow for determining whether or not the portable device 5 is confined to the trunk room 1a will be described. FIG. 6 shows a flowchart in the determination. First, the control unit 10 waits until receiving a door lock transmission signal transmitted from the portable device 5 (S1). When the switch 6 is operated, a command signal indicating a door lock and a signal including the ID of the portable device are transmitted. In the case of a predetermined ID registered in the memory 11, the control unit 10 locks the door and then transmits a request signal from the transmission antenna 3 in the vehicle, to which the answer signal is returned. By counting the number, the number of portable devices 5 in the vehicle at that time, that is, the prior number is detected. The prior number and the identification code of the portable device 5 to which the door lock signal is transmitted are stored in the memory 11 (S2).

  Subsequently, the control unit 10 waits until the trunk door detection unit 15 detects that the trunk door 1c is opened and then closed (S3). When the trunk door 1c is closed, the control unit 10 transmits a signal from the transmission antenna 3 in the vehicle again, and counts the number of portable devices 5 that have responded to the signal, whereby the portable device 5 in the vehicle at that time. (Number of discriminants) is detected (S4).

  The control unit 10 compares the discrimination number detected in S4 and the prior number detected in S2 (S5), and when the discrimination number is larger than the prior number, confinement in the trunk room 1a of the portable device 5 occurs. It is determined that the trunk door 17 is operated, the trunk door 1c is locked, and the trunk door 1c is controlled to be opened (S8). If the discriminating number is the same as the prior number (S6), whether or not the portable device 5 detected in the vehicle corresponds to the identification code stored in the memory 11, that is, the portable device used for the door lock. (S7), if so, it is determined that the mobile device 5 has been trapped in the trunk room 1a, and the trunk drive unit 17 is operated to open the trunk door 1c. Is controlled to open (S8). In S6, when the number of discrimination is less than the prior number, and in S7, when there is no portable device 5 used for the door lock in the vehicle, it is assumed that no confinement in the trunk room 1a of the portable device 5 occurs. Return to the initial state.

  Although the embodiment of the present invention has been described above, the application of the present invention is not limited to this embodiment, and can be variously applied within the scope of the technical idea. For example, in the present embodiment, the prior number is detected when the door is locked, but the prior number is counted when the door detection unit 14 detects that all the doors are closed. You may do it. Further, in this embodiment, the antenna for detecting the inside of the vehicle is arranged mainly in the passenger compartment where the occupant rides and the trunk provided behind the passenger compartment to load the luggage. When it is provided at the front, it may be placed in the front or in the dashboard. In this embodiment, the trunk door is unlocked and the trunk door is opened, but only the lock may be released. Further, in the present embodiment, the determination of the portable device in the vehicle is determined based on whether or not communication with a predetermined antenna arranged in the vehicle is possible, but this is not a limitation, and a known method can be used. For example, the detection can be made even if the transmission range of the antenna is transmitted toward the inside and outside of the vehicle, and the overlapping range of the transmission range of each antenna is within the vehicle. In this case, if the signal can be received from any antenna, it may be determined that the vehicle is in the vehicle. Moreover, the distance of the portable device with respect to the plurality of antennas may be obtained from the signal intensities from the plurality of antennas, and then the absolute position of the portable device may be detected to identify the inside of the vehicle.

It is a schematic diagram of the keyless entry device in this embodiment. It is a block diagram of the keyless entry device in this embodiment. It is a schematic diagram showing the positional relationship between a vehicle and a portable device. FIG. 4 is a schematic diagram showing a positional relationship between a vehicle and a portable device when different from FIG. 3. FIG. 5 is a schematic diagram showing a positional relationship between a vehicle and a portable device in a case different from FIGS. 3 and 4. It is the flowchart which showed the operation | movement for prevention of confinement of a portable machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 1a Trunk room 1b Car compartment part 1c Trunk door 2 Vehicle side device 3 Transmission antenna 4 Reception antenna 5 Portable machine 10 Control part 11 Memory 12 Transmission part 13 Reception part 14 Door detection part 15 Trunk door detection part 16 Lock drive part 17 Trunk Drive unit 20 Portable device control unit 21 Portable device reception unit 22 Portable device transmission unit 23 Memory 24 Antenna

Claims (3)

A vehicle-side device provided in a vehicle having a lockable compartment door and a trunk-room trunk door, and a plurality of portable devices each having a unique identification code and wirelessly communicating with the vehicle-side device; The vehicle side device is a keyless entry device including a control unit that performs locking and unlocking of the compartment door and locking and unlocking of the trunk door,
The control unit detects the number of portable devices that are determined to be present in the vehicle including the vehicle compartment and the trunk room when lock control of the vehicle compartment door is performed based on a lock signal from the portable device. And storing the identification number of the portable device that has transmitted the locking signal, and then determining the number of portable devices that are determined to be present in the vehicle when the trunk door is closed as the determination number And detecting the identification code of the portable device existing in the vehicle, and when the determination number is larger than the previous number or when the determination number is the same as the previous number and the lock signal is transmitted A keyless entry device that controls the lock of the trunk door to be unlocked in both cases when it is determined that a machine is present in the vehicle.   A plurality of doors of the lockable compartment are provided in the vehicle, and the open / close state can be detected by the control unit, and the control unit detects when the prior number is detected from the portable device. Instead of performing door locking control based on a signal, when detecting that all of the compartment doors have been closed after any of the compartment doors has been opened. The keyless entry device according to claim 1, wherein:   3. The keyless device according to claim 1, wherein the vehicle includes a transmission antenna inside the vehicle, and the control unit determines that the portable device that has received a signal from the transmission antenna inside the vehicle is present in the vehicle. 4. Entry device.

Images