JPH0512117Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an antenna device used in a keyless entry system of an automobile, etc.

(Prior art) In recent years, various technologies using wireless communication have been actively adopted in automobiles. A system is shown in which locking and unlocking operations can be performed wirelessly. this is,
a portable transmitter that wirelessly transmits a predetermined unique signal;
A receiving means provided on the vehicle body side to receive the above-mentioned unique signal; a switch provided, for example, near the door handle to output a lock/unlock operation start signal; The side is equipped with a unique signal matching means for determining whether the unique signal matches a preset unique signal, and basically, if the unique signal from the transmitter matches the preset unique signal and the switch When turned on, the lock actuator is actuated to lock or unlock the door lock device.

On the other hand, various types of so-called keyless entry systems for automobiles have been considered, which allow doors to be locked and unlocked from outside the vehicle without using a key. When a wireless door lock control device is adopted, it is desirable to arrange its receiving antenna on the door window (door window glass) for the following reasons. In other words, in addition to radio and television antennas, automobiles are sometimes equipped with various antennas such as those for wireless telephones, but in such cases, the front window and rear window may be occupied by these antennas. There is sex. Furthermore, even if it were possible to install antennas for the keyless entry system on these windows, for example, attachment of other antennas would be restricted and visibility would be reduced. Furthermore, in the above-mentioned keyless entry system, since the door is equipped with a door lock device and the like to be controlled, it is desirable to arrange the antenna as close as possible to these controlled objects.

(Problems to be solved by the invention) By the way, for example, in the keyless entry system as described above, when adopting a configuration in which an antenna is provided on the window glass of the door window,
It is not preferable to fixedly connect the antenna and the control means etc. with a signal line because the window glass is moved up and down. Therefore, contact portions are provided on the antenna side and the control means side, and these contact portions are brought into contact with each other. In that case,
If both contact points are kept in constant mechanical contact, the contact portions will easily wear out due to sliding of both contact points as the window glass moves up and down, reducing the durability of the contact points. As a result, a problem arises in that the reliability of the system is reduced.

The present invention addresses the above-mentioned problem of contact wear when an antenna is installed on a windshield that can be opened and closed in a car, and is an antenna device for an automobile that can prevent contact wear due to the vertical movement of the windshield. The present invention aims to improve the reliability of keyless entry systems, etc., in which this type of antenna device is used.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a structure in which an antenna is provided on the openable and closable window glass, and information received by the antenna can be transmitted to a separately provided receiving section. The antenna device for an automobile configured as described above is characterized by the following configuration.

That is, a contact part connected to the receiving part and capable of coming into contact with and separating from the antenna, a driving means that drives the contact part to bring it into contact with the antenna or move the contact part away from the antenna, and a passenger and a contact section control section that controls contact and separation of the contact section with respect to the antenna via the drive section based on a signal from the detection section. In that case, the contact portion control means:
When the getting on/off detecting means detects that an occupant gets on or off, the contact part is moved away from the antenna via the driving means, and when the getting on/off detecting means detects that an occupant gets on or off, the contact section is moved away from the antenna via the driving means. The structure is such that the part comes into contact with the antenna.

(Function) According to the above configuration, when a passenger is riding in the vehicle, the contact part is in a non-contact state with the antenna provided on the openable/closable window glass, so that the contact part is not in contact with the antenna provided on the window glass, which can be opened and closed. It is possible to prevent wear and tear on the corresponding antenna portion, and as a result, the reliability of the system in which the antenna is used is improved. On the other hand, when the passenger is getting off the vehicle, the antenna and the contact section are in contact, and the antenna is electrically connected to a predetermined receiving section via the contact section, so that the antenna receives signals. The received signal will be transmitted to the receiving section. Therefore, it is possible to realize an antenna device with excellent durability and reliability, such as an antenna device for a keyless entry system, which is used only when a passenger is not in the vehicle (that is, when exiting the vehicle). Become.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. Note that this embodiment relates to a case where the present invention is applied to an antenna device for a keyless entry system of an automobile.

First, the overall configuration of the keyless entry system will be briefly explained using FIG. 1. As shown in the figure, this keyless entry system
A portable transmitter 1 that outputs a predetermined signal a, an antenna 3 for receiving the signal a disposed on a door window 2 of an automobile as described later, and the antenna 3.
a second contact part 4 provided so as to be able to approach and separate from the first contact part 3a; a receiving part 5 connected to the second contact part 4; and a door lock device based on a signal from the receiving part 5. 6, and a door lock actuator 7 for performing locking and unlocking operations. Basically, while the first contact section 3a and the second contact section 4 are in contact with each other, a signal a transmitted from the portable transmitter 1 outside the vehicle is transmitted to the receiving section 5 via the antenna 3. , and along with this, the receiving section 5
By outputting a predetermined signal from the door lock actuator 7 to the door lock actuator 7, the door lock device 6 is locked or unlocked.

In this case, this system includes boarding/alighting detection means 8 for detecting when a passenger gets on or off the vehicle, contact control means 9 to which a signal from the detection means 8 is input,
A contact driving means 10 is provided which causes the second contact part 4 to contact or separate from the first contact part 3a based on the output signal of the control means 9.

Next, the configuration of this embodiment will be specifically explained. As shown in FIG. 2, a window glass 13 is provided in the window portion of a door 12 disposed on the side of the vehicle body 11 so as to be movable up and down, and the antenna 3 for the keyless entry system is mounted on the window glass 13. It is arranged. Further, the panel portion of the door 12 is provided with a door outer handle 14, a door lock knob 15, and a door lock actuator 7 consisting of a small motor, a reduction gear, and an electromagnetic clutch. Then, by operating the lock actuator 7 in accordance with the signal from the control unit 16 installed in the vehicle body 11,
Locking and unlocking operations of the door locking device 6 shown in FIG. 1 are performed. Here, when the window glass 13 of the door 12 is closed, as shown in FIG. The antenna for the keyless entry system is preferably installed on the door 12 where the actuator 7 etc. are installed, and it also helps to avoid deterioration of visibility and simplify the configuration. This is the result of taking into consideration.

Further, as shown in FIGS. 4 and 5, one end of the antenna 3 is a first contact portion 3a.
One end of the receiving signal line 17 is connected to the receiving section 5 of the control unit 16, and the other end of the receiving signal line 17 is provided with a second contact section 4, which contacts and separates from the first contact section 3a on the antenna 3 side. It is considered possible. That is, in the panel portion of the door 12, there is a contact bar 19 whose middle portion is supported by a pin 18 provided in the door panel so as to be swingable, and the second contact portion 4 is attached to one end 19a, and a rod. Part 2
A push-pull solenoid 20 (shown as a contact drive means 10 in FIG. 1) has a tip 0a connected to the other end 19b of the contact bar 19, and a second contact 4 is connected to the first contact 3a. A spring 21 is provided that biases the contact bar 19 in the direction of contact. Then, the solenoid 20 is turned on based on a predetermined signal output from the contact control means 9 in the control unit 16.
When the rod portion 20a protrudes in the direction of the arrow A, the second contact portion 4 moves in the direction of the arrow B and the second contact portion 4 moves in the direction of the arrow B.
While separating from the contact portion 3a, the solenoid 20
When OFF, the spring 21 pushes one end 19a of the contact bar 19 in the direction opposite to B, so that the second contact portion 4 comes into contact with the first contact portion 3a.

However, as a feature of the present invention, the ON/OFF operation of the solenoid 20, that is, the first and second contact portions 3
The contact/separation operations of a and 4 are controlled by a signal from the boarding/alighting detection means 22 (indicated by reference numeral 8 in FIG. 1) which is input to the contact control means 9 in the control unit 16, as shown in FIG. It is now being carried out based on In this case, in this embodiment, the getting on/off detecting means 22 is composed of a seat switch 23 and a door lock switch 24. Of these, the seat switch 23 detects whether or not an occupant is seated on a seat in the vehicle interior, in other words, whether or not an occupant is in the vehicle. The door lock switch 24 also detects whether the door 12 is locked. When the output signal of the seat switch 23 indicates that the passenger is getting into the vehicle, a drive signal is output from the contact control means 9 in the control unit 16 to the transistor 25, and the transistor 25 is made conductive. , while the push-pull solenoid 20 provided between the transistor 25 and the power source 26 is turned on, the switches 23 and 24 detect that the occupant has exited the vehicle and the door 12 has been locked. in some cases,
Contact control means 9 in control unit 16
Since the drive signal is not outputted to the transistor 25 and the transistor 25 becomes non-conductive, the push-pull solenoid 20 is turned off, and in this state, the first contact portion 3a and the second contact portion 4 are in contact. It is configured so that.

Next, the operation of this embodiment will be explained.

Now, a passenger gets out of the cabin of vehicle body 11 and opens door 1.
2 is locked, these states are the seat switch 23 and door lock switch 24.
A signal indicating each detection result is input to the contact control means 9 in the control unit 16. In this case, the control means 9
Since the configuration is such that no drive signal is output to the transistor 25 from the
It becomes OFF state. Therefore, in this case, one end 19a of the contact bar 19 is moved to the fifth position by the spring 21.
By being pushed in the direction opposite to B in the figure, the one end 19
Since the second contact portion 4 attached to the antenna 3 is in contact with the first contact portion 3a of the window glass 13 on the side of the antenna 3, the antenna 3 is launched from the portable transmitter 1 shown in FIG. signal a can be received.

Next, in this state, when a passenger tries to board the vehicle and sends a predetermined signal a from outside the vehicle to the antenna 3 using the portable transmitter 1, the first contact part 3a and the second contact part Since the antenna 4 is in contact with the antenna 3, the signal a received by the antenna 3 is transmitted to the receiving section 5 in the control unit 16 via both the contact sections 3a and 4 and the receiving signal line 17. As a result, the door lock device 6 is unlocked via the door lock actuator 7, and the door 12 is brought into the unlocked state. Therefore, by operating the door outer handle 14 in this state, the door 12 can be opened without using a key.

However, when a passenger gets on the vehicle,
When an occupant is seated on a seat in the vehicle interior and the door 12 is closed, a signal is sent from the contact control means 9 in the control unit 16 to the transistor 25 based on a signal from the seat switch 23 that detects the occupant's seating. The drive signal is output, and the transistor 25 is made conductive accordingly, so that the solenoid 20 is turned on. When the solenoid 20 is turned ON in this way, the rod portion 20a projects in the direction of arrow A in FIG. 1st antenna 3 side
The second contact portion 4 is separated from the contact portion 3a, and both of the contact portions 3a and 4 are in a non-contact state. Therefore, when a passenger is riding in the vehicle, the first contact portion 3a on the antenna 3 side and the second contact portion 4 on the control unit 16 side are maintained in a non-contact state. Even if the window glass 13 of the door 12 is moved up and down in this state, both contact portions 4 will not be slid but will be displaced in a non-contact state. This avoids wear on both contact parts 3a and 4 due to sliding between the first contact part 3a and the second contact part 4 when the window glass 13 moves up and down, and improves the reliability of the keyless entry system. become.

(Effects of the invention) As described above, according to the invention, in an automobile antenna device in which an antenna is provided on a windshield that can be opened and closed, the contact portion on the antenna side can be brought into contact with and separated from it by the vertical movement of the windshield. Since this type of antenna device is prevented from being worn out, the reliability and durability of keyless entry systems and the like using this type of antenna device are improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a block diagram showing the overall configuration of a keyless entry system to which the automotive antenna device according to the embodiment is applied, and FIG. 2 shows its specific configuration. Fig. 3 is a side view of the door in Fig. 2, Fig. 4 is a partially omitted enlarged view of the contact area seen from the inside of the door, and Fig. 5 is a perspective view of the main parts of the automobile. FIG. 6, a cut cross-sectional view, is an electric circuit diagram showing the electrical connections of the main parts of the antenna device. 3...Antenna, 4...Contact part (second contact part),
5... Receiving unit, 8, 22-24... Getting on/off detection means (23... Seat switch, 24... Door lock switch), 9... Contact part control means, 10, 20
. . . Contact portion driving means (20 . . . push-pull solenoid), 13 . . . Wind glass.

Claims (1)

[Scope of utility model registration request] An antenna device for an automobile is configured such that an antenna is provided on a windshield that can be opened and closed, and information received by the antenna can be transmitted to a separately provided receiving section, and the antenna device is connected to the receiving section and configured to transmit information received by the antenna to a separately provided receiving section. a contact portion that can be moved toward and away from the antenna, a drive means that drives the contact portion to bring it into contact with the antenna or move the contact portion away from the antenna, and a boarding/alighting detection unit that detects when a passenger gets on or off the vehicle; When the getting on/off detecting means detects that an occupant gets on the vehicle, the contact part is separated from the antenna via the driving means, and when the getting on/off detecting means detects that the occupant gets off the vehicle, the contact part is moved away from the antenna via the driving means. 1. An antenna device for an automobile, comprising a contact part control means for bringing a contact part into contact with an antenna.