JPH09310548A - Reception antenna for wireless door lock device of vehicle and wireless door lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a receive antenna which can favorably keep the directional characteristic and which is costless and improves the appearance, by forming a receive antenna by the support of a sun visor.. SOLUTION: The horizontal part 22 of the support 20 of a sun visor S is positioned parallelly to the upper edge of the front window shield and horizontally, in the condition that a driver has gotten out of a car. The receiving directional characteristic of the receive antenna is always kept in the same state. In this time, the support 20 is kept in an easily visible position from the outside of the car. The support 20 is made of a metallic flange to sufficiently satisfy the electrical conductivity as a receive antenna. Accordingly, radio waves are securely received by the antenna to output to a receiver through a coaxial cable 62. Then, a car door is locked or unlocked through a motor by a control circuit. In this way, it is not necessary to install an antenna separately and hence, the cost is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving antenna for a wireless door lock device of a vehicle and a wireless door lock device equipped with this receiving antenna.

[0002]

2. Description of the Related Art In some vehicle wireless door lock devices, a receiving antenna is built into a receiver so as not to be exposed to the outside. According to this, the installation location of the receiver can be determined regardless of the installation location of the receiving antenna. In addition, the installation cost of the receiving antenna and the wiring cost are eliminated, which helps to reduce the cost of the wireless door lock device.

[0003]

By the way, since the position easily visible from the outside of the vehicle compartment is the position where it is easy to receive the transmission radio wave from the outside of the vehicle compartment, the receiver having the built-in receiving antenna as described above is It is desirable to install it in a position that is easy to see from the outside. However, if the receiver is installed in a position that is easily visible from the outside of the passenger compartment, the receiver will not look good in the passenger compartment. Therefore, it is necessary to install the receiver in a place that is not visible to passengers.

Therefore, the request to install the receiver in a place where the passengers cannot see it and the request to install the receiver, that is, the receiving antenna, in a position that is easily visible from the outside of the vehicle compartment
It can be said that they are physically incompatible. In addition, even if we could find a receiver installation position that meets these requirements,
Since this installation position changes depending on the vehicle body shape of the vehicle, it becomes necessary to examine the installation position for each vehicle.

[0005] In response to this, the actual development of 59-39518
As disclosed in Japanese Patent Publication No. 59-39519 and Japanese Utility Model Laid-Open No. 59-39519, it is possible to incorporate a receiving antenna in a loop shape in a light-shielding plate of a sun visor. However, in these publications, although the appearance problem is solved, the receiving antenna is located over a wide range within the light shielding plate. Therefore, when the sun visor is used and when the sun visor is not used, the turning position of the light shielding plate with respect to the support column is different, and the position of the receiving antenna also largely changes. Therefore, there arises a problem that the directional characteristic of the receiving antenna largely changes depending on the position of the light shielding plate.

In order to cope with the above, the present invention devises the utilization of the sun visor located at a position easily visible from the outside of the passenger compartment of the vehicle so that the directional characteristic is maintained well and the appearance is inexpensive. It is an object of the present invention to provide a receiving antenna for a wireless door lock device for a vehicle, and the wireless door lock device.

[0007]

In order to achieve the above object, according to the invention of claim 1, the receiving antenna is
It is composed of the pillars of the sun visor. Therefore, it is possible to provide the wireless door lock device including the receiving antenna located at a position that looks good to the passenger in the vehicle interior.

Further, since the receiving antenna is also used as the pillar of the sun visor, the constituent members of the existing sun visor in the room can be effectively utilized. Therefore, it is possible to provide at low cost a wireless door lock device equipped with a receiving antenna located at a position that is visually appealing to passengers inside the vehicle. Further, the receiving antenna is composed of a pillar made of a metal material provided on the sun visor, and the pillar is arranged at a position where it is easily visible from the outside in the vehicle compartment. Therefore, the radio wave receiving function as the receiving antenna can be properly secured.

Moreover, even if the light shielding plate is vertically adjusted, the position of the receiving antenna is hardly changed. Therefore, the directional characteristics of the receiving antenna do not change. Further, since the position of the sun visor is specified regardless of the change in the specifications of the vehicle, it is not necessary to consider the installation position of the receiving antenna according to the vehicle type. Further, according to the invention described in claims 2 and 3, the receiving antenna is built in the light-shielding plate of the sun visor in the vicinity of a position coaxial with the shaft support portion by the support, and the signal processing circuit has the light-shielding plate. It is built in and is connected to the receiving antenna.

As a result, even if the light shielding plate is vertically adjusted, the position of the receiving antenna remains almost unchanged. As a result, it is possible to achieve the same effect as the invention of claim 1. In this case, since both the receiving antenna and the signal processing circuit are built in the light shielding plate, connection wiring between them can be eliminated. Here, as in the invention described in claim 3, the light shielding plate is provided with a mirror (33, 34) with an illumination light source, and the power source line and the ground line of the illumination light source are the power source line and the ground line of the signal processing circuit. If they are made common, it is possible to eliminate the need for extra wiring.

Further, according to the invention of claim 4, the receiving antenna for the wireless door lock device of the vehicle is constituted by a pillar made of a metal material provided on the sun visor. As a result, it is possible to provide a receiving antenna for a wireless door lock device that can achieve the effects of the invention described in claim 1.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a schematic block configuration of a vehicle wireless door lock device to which the present invention is applied. Here, the vehicle is provided with a sun visor S as shown in FIG. This sun visor S
Is a vehicle interior upper wall 10 near the upper edge of the front windshield F (see FIG. 3) above the front side of the vehicle interior driver's seat of the vehicle.
Attached to. As a result, the sun visor S
It is located in a position where it is easy to see through the window from the outside of the passenger compartment.

The sun visor S is composed of a support column 20 and a light shielding plate 30. The column 20 is formed by plating the outer surface of a metal pipe (for example, iron) with metal to prevent corrosion. The column 20 has a vertical portion 21.
And a horizontal portion 22 that extends horizontally from the vertical portion 21 to form an L shape. The vertical portion 21 is rotatably supported at its upper end in the through hole portion 11a formed in the horizontal bottom wall 11 of the outer cover 10a so as to be horizontally rotatable, and is integrated with the upper end of the vertical portion 21. The formed metal flange 21a cannot be prevented from coming off downward from the through hole portion 11a.

Here, the outer cover 10a is fastened at its flange 12 to the outer plate of the vehicle interior upper wall 10 by a plurality of metal screws 12b via a metal base 12a. The bottom wall 11 passes through the opening of the inner plate of the vehicle interior upper wall 10 and projects into the vehicle interior. The outer cover 1
On the bottom wall 11 of 0a, the inner cover 10b is attached to the vertical portion 21.
It is mounted so as to cover the flange 21a of.
In the present embodiment, the outer cover 10a and the inner cover 10b.
Are both formed of an electrically insulating resin material and electrically insulate the support column 20 from the vehicle body of the vehicle.

A light shield plate 30 is provided on the horizontal portion 22 of the column 20.
Is rotatably supported by its upper edge portion 31 (corresponding to the horizontal rotation shaft of the light shield plate 30).
Rotates vertically about the horizontal portion 22 (see FIG. 3). In addition, the light shielding plate 30 includes the vertical portion 21 of the support column 20.
With this rotation, the vertical portion 21 is rotated in the horizontal direction (see FIG. 4).

The wireless door lock device has a door lock mechanism L mounted on the driver's seat door of the vehicle,
The door lock mechanism L is configured to lock the driver's seat door by the lock operation and unlock the driver's seat door by the unlock operation. Further, the wireless door lock device includes a transmitter 40 and a receiving antenna 50, and the transmitter 40 transmits a verification code for identifying the vehicle as a radio wave to the receiving antenna 50 by the operation of the owner. .

The receiving antenna 50 constitutes an essential part of the present invention, and the receiving antenna 50 is constituted by the pillar 20 of the sun visor S described above. Then, the receiving antenna 50 receives the radio wave transmitted by the transmitter 40 and outputs it as a reception signal to the receiver 60. Here, the rationale for focusing on constructing the receiving antenna 50 with the columns 20 will be described.

In addition to the position of the sun visor S which is easy to see from the outside of the vehicle, the frequency of the radio wave used in the transmitter 40 is usually 300 MHz in recent years.
Has been adopted. Therefore, the receiving antenna 50 is required to have a length of at least about 25 cm, which is the (1/4) wavelength of the radio wave of 300 MHz. From this point,
This is because the length of the pillar 20 of the sun visor S is suitable as the length of the receiving antenna 50.

The receiver 60 is provided with a high frequency signal processing circuit 61, and this high frequency signal processing circuit 61 is connected to the receiving antenna 50, that is, the column 20 of the sun visor S via a coaxial cable 62 (FIGS. 1 and 2). 2). The high frequency signal processing circuit 61 subjects the received signal of the receiving antenna 50 to amplification and demodulation waveform shaping processing, and generates a processed signal representing the collation code.

Here, as shown in FIG. 2, the coaxial cable 62 is inserted between the outer plate and the inner plate of the upper wall 10 of the vehicle compartment, and the outer end portion 62a of the coaxial cable 62 has its folded net wire. The base 1 by the clamp 13 at the portion 62b
It is fixed to 2a. As a result, the mesh line portion 62b becomes
Through the base 12a and the screw 12b, the coaxial cable 62
The grounding of the vehicle body of the vehicle is secured.

Further, the coaxial cable 62 extends through the upper wall of the inner cover 10b at the front end exposed portion 62c of the center conductor thereof, and is electrically connected to the flange 21a of the column 20 by soldering. . Further, the receiver 60 includes a microcomputer 63, a memory 64, an input circuit 65 and an output circuit 66, and the microcomputer 6
Reference numeral 3 determines whether the matching data match or not based on the processed signal from the high frequency signal processing circuit 61 and the data stored in the memory 64 (the matching data), and determines whether the door lock mechanism L is allowed to operate via the output circuit 66. The output that is output is output to the control circuit 70 that controls the drive of the motor M for the door lock mechanism L.

Based on the output of the output circuit 66, the control circuit 70 controls the motor M so that the door lock mechanism L operates either lock operation or unlock operation. The input circuit 65 outputs to the microcomputer 63 the output of the door switch SW that detects the open / closed state of the driver's door of the vehicle and the output of the key switch that detects the presence / absence of a key. This output is used by the microcomputer 63 as a condition for determining whether the output to the output circuit 66 is possible.

In the first embodiment constructed as described above, when the occupant gets off the vehicle, the horizontal portion 22 of the pillar 20 of the sun visor S normally has a front windshield as shown in FIG. It is located horizontally parallel to the upper edge of F. At this time, the column 20 is maintained at a position where it can be easily seen from the outside of the vehicle. That is, the receiving antenna 50 is in a position where it is easy to receive from the outside of the vehicle through the window. Further, since the support column 20 is composed of the metal pipe, the metal plating, and the metal flange 21a as described above, the support column 20 has the receiving antenna 50.
Sufficiently satisfies the electrical conductivity required as Further, the length of the column 20 has a value sufficient to receive the radio wave transmitted by the transmitter 40.

Therefore, when a radio wave is transmitted from the transmitter 40, this radio wave is accurately received by the receiving antenna 50 and is passed through the coaxial cable 62 as a reception signal to the receiver 60.
Is output to Then, based on the output of the receiver 60, the control circuit 70 locks or locks the door lock mechanism L via the motor M. As a result, the vehicle door is locked or unlocked.

Further, as described above, the receiving antenna 50 is constructed by also using the support column 20 as an antenna. Therefore, even if an occupant gets on the vehicle, the receiving antenna 50 is an obstacle to the occupant. There is no. Therefore, it is possible to provide a wireless door lock device having a good-looking reception antenna. Further, since the position of the sun visor is specified regardless of the change in the specifications of the vehicle, it is not necessary to consider the installation position of the receiving antenna according to the vehicle type.

Further, as the receiving antenna 50, the pillar of the existing sun visor of the vehicle is also used, so that it is possible to reduce the cost without providing a separate receiving antenna. In addition,
As shown in FIG. 4, the sun visor S may be located on the window side of the passenger compartment to block the sunlight from the window, but when the passenger disembarks, the sun visor S is placed parallel to the upper edge of the front windshield F. Since it is normally performed after the vehicle is dismounted, the sun visor S is not located on the window side of the passenger compartment after getting off the vehicle.

Therefore, since the sun visor S is positioned parallel to the upper edge of the front windshield F when the occupant gets off the vehicle, the reception antenna 50 receives the radio wave from the transmitter 40. The directional characteristics are always in the same state. Therefore, the operation of the wireless door lock device is not hindered. In addition,
In the above-described first embodiment, an example in which the support column 20 is made of a metal pipe has been described, but the support column 20 may be made of a metal column.

In the first embodiment, the light shield plate 3
An example has been described in which the upper edge portion of 0 is pivotally supported by the column 20, but instead of this, for example, the vertical intermediate portion of the light shielding plate 30 is pivotally supported by the column 20. May be. 5 and 6 show a second embodiment of the wireless door lock device according to the present invention.

In the second embodiment, as shown in FIG. 6, a sun visor Sa is adopted instead of the sun visor S described in the first embodiment. The sun visor Sa is composed of a column 20A and a light shielding plate 30A. The column 20A is an electrically insulating pipe,
The vertical portion 23 is formed in an L shape so as to have a vertical portion 23 and a horizontal portion 24. The vertical portion 23 is the vertical portion 21 of the pillar 20.
Instead, it is rotatably supported on the upper wall 10 of the vehicle compartment so as to be horizontally rotatable. A light shield plate 30A is pivotally supported on the horizontal portion 24 of the sun visor Sa at the right end portion of its upper edge portion 32 so as to be vertically rotatable.

As a result, the sun visor Sa has the same rotating function as the sun visor S. In addition, the support 20A,
You may implement by forming with the same constituent material as the support | pillar 20 described in the said 1st Embodiment. As shown in FIG. 5, the wireless door lock device according to the second embodiment includes a receiving antenna 50A, a receiver 60, a control device 70, a motor M and a door lock mechanism L described in the first embodiment. I have it.

The high-frequency signal processing circuit 61 of the receiving antenna 50A and the receiver 60, as shown in FIG.
Built in 0A. Here, the receiving antenna 50A
Is a conductor wire with good electrical conductivity such as copper wire,
As shown in FIG. 6, the receiving antenna 50A is located inside the upper edge portion 32 of the light shielding plate 30A.

As a result, the directional characteristics of the receiving antenna 50A can be kept the same regardless of the vertical rotation of the light shielding plate 30A. However, the length of the receiving antenna 50A is the same as the length of the receiving antenna 50. The high-frequency signal processing circuit 61 is directly connected to the receiving antenna 50A at its input terminal, and extends from the high-frequency signal processing circuit 61 via the connector 61a. The power supply line 61b, the ground line 61c, and the output line 61d. Is the post 20
It is connected to the power source, the vehicle body and the microcomputer 63 through A. Other configurations are the same as those in the first embodiment.

In the second embodiment thus constructed, the receiving antenna 50A is built in the upper edge portion of the light shielding plate 30A of the sun visor Sa. Therefore, the light shielding plate 30A is the horizontal portion 24 of the support column 20A, that is, the upper edge portion 3A.
Even if the receiving antenna 50A rotates about the axis 2, the position of the receiving antenna 50A does not substantially change, and the same directional characteristics can be always maintained.

This makes it possible to achieve the same effect as that of the first embodiment. In addition, the high frequency signal processing circuit 61
Is incorporated in the light shielding plate 30A together with the receiving antenna 50A, the high frequency signal processing circuit 61 is connected to the receiving antenna 50A.
It can be directly connected to A, and as a result, the coaxial cable 62 described in the first embodiment is unnecessary. Therefore, the number of wires passing through the support column 20A is reduced, which leads to cost reduction.

FIG. 7 shows a modification of the second embodiment. In this modification, the mirror 33 and the illumination lamp 34 are provided on the surface of the light shielding plate 30A described in the second embodiment. The lamp 34 includes both wires 34a,
At 34b, they are respectively connected to the power supply line 61b and the ground line 61c of the high frequency signal processing circuit 61 in the vicinity of the inner end of the support column 20A. The lamp 34 and the mirror 33
Is covered by a cover 35 so as to be openable and closable. Other configurations are the same as those of the second embodiment.

In this modified example having such a configuration, both wirings 34a and 34b of the lamp 34 are connected to each other by the high frequency signal processing circuit 6.
Since the power source line 61b and the ground line 61c are connected to the power source and the vehicle body, the power line and the ground line of the high frequency signal processing circuit 61 can be shared as the power line and the ground line of the lamp 34. As a result, the power line and ground line unique to the lamp 34 may be unnecessary.

In the second embodiment, the receiver 6
Only the high frequency signal processing circuit 61 out of 0
However, the circuit other than the high-frequency signal processing circuit 61 of the receiver 60 is not limited to this, and the light shield plate 30 is also included.
It may be built in A and implemented. Further, in the second embodiment, an example has been described in which the upper edge portion of the light shield plate 30A is pivotally supported by the column 20A, but instead of this, for example, the vertical middle portion of the light shield plate 30A is used. Alternatively, the horizontal portion 24 of the column 20A may be pivotally supported. In this case, the receiving antenna 50A is the horizontal portion 2 of the column 20A.
It is built in the light-shielding plate 30A coaxially with 4. This makes it possible to achieve the same effect as that of the second embodiment.

Further, in carrying out the present invention, the present invention is not limited to the sun visor located above the front side of the driver's seat, and the present invention is applied to various sun visors provided on the passenger seat and other seat sides of the vehicle. Good.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of a vehicle wireless door lock device according to the present invention.

FIG. 2 is a cross-sectional view of essential parts showing a connection state between a sun visor mounted above a driver's seat on a vehicle compartment upper wall located near an upper edge of a front windshield of the vehicle and a receiver.

FIG. 3 is a perspective view showing a state in which a light shielding plate of the sun visor of FIG. 2 is rotated in a vertical direction.

FIG. 4 is a perspective view showing a state in which a light shielding plate of the sun visor of FIG. 2 is horizontally rotated.

FIG. 5 is a block diagram showing a second embodiment of a vehicle wireless door lock device according to the present invention.

FIG. 6 is an enlarged view of a main part of a sun visor including the receiving antenna and the high frequency signal processing circuit of FIG.

FIG. 7 is a partial cutaway view showing a modified example of the second embodiment.

[Explanation of symbols]

40 ... Transmitter, 20, 20A ... Struts, 22, 24 ... Horizontal part, 33 ... Mirror, 34 ... Illumination lamp, 50, 50A
... reception antenna, 60 ... receiver, 61 ... high frequency signal processing circuit, 61b ... power supply line, 61c ... grounding wire, L ... door lock mechanism.

Claims (4)

[Claims] 1. A vehicle provided with a sun visor (S) having a column (20) provided at a proper position on a vehicle interior wall and a light shielding plate (30) supported on the vehicle interior wall via the column so as to be positionally adjustable. A lock mechanism (L) for locking or unlocking the door of the receiver and a receiving antenna (5) for receiving the radio waves transmitted by the transmitter (40).
0) and a control means (60, 70, M) for controlling the operation of the lock mechanism so as to lock or unlock the door based on the radio wave received by the receiving antenna, A wireless door lock device for a vehicle, wherein a pillar is made of a metal material, and the receiving antenna is composed of the pillar. 2. A lock mechanism (L) for locking or unlocking a vehicle door equipped with a sun visor (Sa), and a receiving antenna (5) for receiving radio waves transmitted by a transmitter (40).
0A), a signal processing circuit (61) for processing the received radio wave of the receiving antenna, and a control means (61) for controlling the locking mechanism so as to lock or unlock the door based on the output of the signal processing circuit. Through 66, 70, M), the sun visor has a pillar (20A) provided at a proper position on a vehicle interior wall of the vehicle, and the position adjustment is performed on the vehicle interior wall via the pillar. A light-shielding plate (30A) that is supported so that the receiving antenna is built in the light-shielding plate in the vicinity of a position coaxial with a pivotal support portion of the column, and the signal processing circuit is the light-shielding plate. A wireless door lock device for a vehicle, which is built in a vehicle and is connected to the receiving antenna. 3. A mirror (3) with an illumination light source is provided on the light shielding plate.
3, 34) are provided, and the power supply line and the ground line of the illumination light source are common to the power supply line and the ground line (61b, 61c) of the signal processing circuit, respectively. Vehicle wireless door lock device. 4. A reception antenna for a wireless door lock device of a vehicle, comprising a sun visor (S) supported at a proper position in a vehicle compartment through a column (20) so as to be positionally adjustable, wherein the column is made of a metal material. A receiving antenna for a vehicle wireless door lock device, which is formed by the pillars.