JP2002225638A - Instrument device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive instrument device for a vehicle including a receiving part of high receiving performance. SOLUTION: This instrument device (meter) 100 for the vehicle has an indicating part 130 executing the visual display corresponding to various conditions of the vehicle, the receiving part 120 receiving the radio information from the external, and outputting signals for the control of the vehicle and the communication, and a control part 110 for controlling these parts and electrical components 402 installed on the vehicle. The receiving part 120 is constituted in such manner that an antenna 121 and a high frequency circuit 123 are separated from each other. The high frequency circuit 123 is demountably mounted on a wiring board having the control part 110.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instrument for a vehicle.

[0002]

2. Description of the Related Art In recent years, a so-called keyless system has been used which controls locking / unlocking of a lock of a vehicle and starting of an engine by operating a transmission unit for transmitting radio waves from outside the vehicle. In 216735 gazette,
By incorporating at least the antenna of the receiving unit for receiving the radio wave into a meter mounted on the vehicle, the arrangement position of the antenna can be improved, and the electronic components, the circuit board, and the usage of various connector members can be reduced. Thus, there is disclosed a vehicle instrument device that can simplify the entire system and reduce the cost, and can ensure good reception sensitivity.

[0003]

In such a conventional technique, the components (circuits) of the receiving unit other than the antenna are integrally disposed on a wiring board of the meter together with other circuits of the meter. Since the dedicated wiring board must be designed around the other circuit for each type of the vehicle, the degree of freedom in mounting the receiving unit on the wiring board is small, There is also a problem that the position and space where the part is provided are affected by them, and the manufacturing cost is increased.

Further, since the other circuit and the receiving section are arranged close to each other on the wiring board, the receiving section is affected by unnecessary radiation from the other circuit, and the sensitivity is deteriorated. There was a problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an in-vehicle instrument device having a built-in receiving unit which is inexpensive and has good receiving performance.

[0006]

According to a first aspect of the present invention, there is provided an instrument for a vehicle, comprising: an instruction unit for performing a visual display according to various states of a vehicle; A receiving unit that receives a wireless information from the outside and outputs a signal for performing control or communication of the vehicle, and a control unit that controls the electrical components installed in each of the units and the vehicle, and includes the receiving unit. The antenna and the high-frequency circuit are separated from each other, and the high-frequency circuit is detachably mounted on a wiring board on which the control unit is provided.

[0007] In particular, in the first aspect of the present invention, the antenna is characterized in that the antenna is made of a substantially L-shaped wire and is arranged in a case that accommodates the wiring board or the respective parts.

[0008] In particular, the invention is characterized in that the antenna is formed by printing a conductor on the wiring board.

[0009] In particular, in the first aspect of the present invention, the antenna is made of a substantially L-shaped wire, is fixed to the high-frequency circuit, and is supported by the wiring board or the case. I do.

[0010] In particular, as set forth in claim 5 in any one of claims 2 to 4, the peripheral portion of the wiring board has a dedicated space for forming, disposing or supporting the antenna. I do.

[0011] In particular, in the first aspect of the present invention, the antenna is fixed to the high-frequency circuit in a chip shape.

[0012] In particular, in the first aspect, the control unit and the electrical component are connected by a multiplex communication line, and the electrical component is controlled according to a signal from the control unit. It is characterized by.

[0013] In particular, in the first aspect of the present invention, a control unit for driving the electrical component is installed together with the control unit in the wiring board, and the control unit is driven in response to a signal from the control unit. The vehicle instrument device according to claim 1, wherein a control unit controls the electrical component.

[0014] Thus, by separately forming the antenna and the high-frequency circuit constituting the receiving section,
The size of the high-frequency circuit can be reduced.

According to a ninth aspect of the present invention, there is provided an instruction unit for performing a visual display according to various states of the vehicle, and outputting a signal for controlling or communicating with the vehicle in response to external wireless information. A receiving unit, and a control unit that controls the electrical components installed in the respective units and the vehicle, the antenna that constitutes the receiving unit and a high-frequency circuit are configured separately, and the antenna performs the control. It is characterized in that it is arranged in a state where it is hard to receive noise from the unit.

In particular, in the ninth aspect of the present invention, the wiring board is disposed on a surface of the wiring substrate opposite to the surface on which the control section is disposed.

In particular, in the ninth aspect of the present invention, the antenna and the high-frequency circuit are arranged on a surface of the wiring board opposite to the surface on which the control section is arranged. The vehicle instrument device according to claim 9.

[0018] In particular, in the ninth aspect of the present invention, as set forth in the twelfth aspect, the receiving unit is disposed on the wiring board at a position where a distance from the control unit is maintained at a sufficient distance. .

[0019] In particular, in the ninth aspect of the present invention, the antenna and the high-frequency circuit are arranged on the wiring board at a location where a sufficient distance from the control unit is maintained. Features.

In particular, the power supply line for supplying power to the control unit and the power supply line for supplying power to the reception unit are separated at a high frequency. I do.

In particular, the power supply line for supplying power to the control unit and the power supply line for supplying power to the reception unit are provided separately from each other. I do.

In particular, the invention is characterized in that an inductance element is inserted into a power supply line for supplying electric power to the control section and / or a ground side.

This makes it possible to dispose the high-frequency circuit at a place where the high-frequency circuit is not easily affected by unnecessary radiation from the control unit mounted on the wiring board of the meter.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the embodiments shown in the accompanying drawings. Reference numeral 100 denotes a vehicle instrument device (meter) installed on a dashboard in a vehicle cabin;
Reference numeral 0 denotes a transmitting unit which carries an operation signal such as a unique identification code D carried by a user such as a driver of the vehicle as radio waves, 3
Reference numeral 00 denotes a multiplex communication line wired inside the vehicle. Reference numeral 400 denotes an electric component unit that is installed at a location where control of the vehicle is required and performs the control. The meter 100 and the electric component unit 400 are It is connected to the multiplex transmission line 300 via the interface circuit 500.

The meter 100 includes a control unit 110 and a receiving unit 1
20, an instruction unit 130, a power supply unit 140, and a rigid and flat wiring board 150 for arranging and fixing them.

The control unit 110 comprises a microcomputer in which a predetermined program is stored in advance for performing meter processing and keyless processing.

The receiving section 120 includes an antenna 121 for receiving the radio wave as the operation signal from the transmitting section 200 and a matching circuit 1 for adjusting the impedance of the antenna 121.
22, and a high-frequency circuit 123 for converting (demodulating) the radio wave received by the antenna 121 into a digital signal.
This result is output to control section 110.

As described above, by forming the receiving unit 120 into subdivided parts, matching is performed for each antenna 121 whose reception characteristics are slightly changed by the shape and material of the wiring board 150 or the wiring pattern formed on the wiring board 150. If the adjustment is performed by the circuit 122, the high-frequency circuit 123 can be standardized, and the manufacturing cost of the receiving unit 120 can be reduced.

The instructing unit 130 processes the status signals from various sensors (not shown) which are installed in various parts of the vehicle and output status signals according to the status of the vehicle based on the meter processing. Drive circuit 131 that outputs a drive signal based on a command signal output from control unit 110
And a display unit 132 for giving an instruction in accordance with the drive signal. The display unit 132 includes, for example, one or more cross coils for displaying a running speed, an engine speed, a fuel remaining amount, and the like by a rotation angle of a pointer. LCD, EL, E which displays the digital or analog bar to indicate the mileage or section distance, such as a meter or stepping motor type instrument body
Display elements such as C, or lamps or LEDs for displaying various indications such as direction indication, light lighting, seat belt wearing, etc.
And the like.

The power supply section 140 is electrically connected to a battery (not shown) mounted on the vehicle, and supplies a predetermined voltage level, for example, 5 volts DC, to each of the above-mentioned sections.

The electrical component unit 400 includes a transmitting unit 200
The control unit 401 outputs an operation signal based on the command signal output from the control unit 110 by processing the operation signal from the keyless process based on the keyless process, and requires control of the vehicle in accordance with the operation signal. And electrical equipment 402 performing a predetermined operation at a place where
Examples of the actuator 2 include an actuator for locking / unlocking a door and a starter motor for starting an engine of the vehicle. With such a configuration, for example, when the receiving unit 120 in the meter 100 receives the operation signal related to locking / unlocking of the door lock transmitted from the transmitting unit 200, the control unit 110 transmits the command signal by the keyless processing. Multiple communication line 300 and communication interface 5
00 to the electrical component unit 400, and drives the electrical component 402 according to the operation signal from the control unit 401 of the electrical component unit 400. The electrical component 402 mounted on each door individually locks the door. Locking and unlocking and up and down of window glass can be performed.

As shown in FIG. 2, an antenna 121, a matching circuit 122, and a high-frequency circuit 123 constituting a receiving circuit 120 (see FIG. 1, the same applies hereinafter) are provided on one side of a wiring board 150. The antenna 121 has an antenna length of 1 / 4.lambda. In order to reduce the size. For example, the antenna 121 is made of a substantially L-shaped wire and fixed to the wiring board 150 (FIG. 2A). 2 (b), and is made of a substantially L-shaped wire and fixed to a high frequency circuit 123 together with a matching circuit 122 (FIG. 2).
(C)), it is possible to fix it to the high frequency circuit 123 together with the matching circuit 122 in the form of a chip (FIG. 2D).

When the antenna 121 is formed by printing a conductor, electrical insulation is provided between the antenna 121 and a region X of another electric circuit formed by printing a conductor on the wiring board 150. It is necessary to provide a predetermined interval in order to secure the influence of the unnecessary radiation from the region X, that is, to reduce the sensitivity of the receiving unit 120 from being deteriorated.
For example, as shown in FIG. 2E, a dedicated space 151 for forming the antenna 121 by printing is prepared around the wiring substrate 150, and the antenna 121 may be formed here. 122 and the high-frequency circuit 123 together with the antenna 121 in the dedicated space 1
51 can also be arranged.

Further, the electric component 402 can be directly controlled from the meter 100 without using the multiplex communication line 300. For example, as shown in FIG.
A control unit 401 constituting the electric component unit 400 (see FIG. 1, the same applies hereinafter) is incorporated in the (wiring board 150), and the control unit 110 controls the control unit 401, thereby controlling the vehicle at a place where control of the vehicle is required. The electric component 402 that performs a predetermined operation can also be driven.

The control unit 110 serves as a source of the unnecessary radiation.
When the control unit 110 outputs the command signal to the drive circuit 131 of the instruction unit 130 by the control unit 110, noise is generated, and this is transmitted to the receiving unit 120 in the air or using the wiring pattern of the wiring board 150 as a medium. In addition, the receiving sensitivity of the receiving unit 120 is deteriorated.

Therefore, as a configuration for preventing the unnecessary radiation, the antenna 121, the matching circuit 122, and the high-frequency circuit 123 constituting the receiving unit 120 are opposite to the surface on which the area X of the other electric circuit on the wiring board 150 is provided. It is conceivable to arrange them on a surface (see FIG. 4). This allows
The unnecessary radiation such as noise emitted from the control unit 110 or the like disposed in the area X is blocked by the wiring board 150 (shield effect), and then the receiving unit 120 is used with air as a medium.
Transmission to the side can be suppressed.

It is desirable to keep the distance between the control unit 110 and the receiving unit 120 at a sufficient distance so that the control unit 110 and the receiving unit 120 are not easily affected by the unnecessary radiation. In a case where the control unit 110 is disposed, for example, as illustrated in FIG. 5, the control unit 110 is disposed at one corner of the wiring board 150, and at least the antenna 121 and the high-frequency circuit 123 that constitute the reception unit 120 are disposed at another corner. By arranging the antenna 121 and the high-frequency circuit 123 in the control unit 110, the distances a and b between the control unit 110 and the antenna 121 can be maintained at a sufficient distance. As the receiving unit 12
Transmission to 0 can be suppressed.

When the receiving section 120 is arranged in a state where it does not easily receive noise from the control section 110 or the like, at least the antenna 121 and the high-frequency circuit 123 are connected to the wiring board 1.
It is arranged on the surface opposite to the surface on which the 50 control units 110 are arranged (see FIG. 4), or is arranged on the wiring board 150 at a location where the distance to the control units 110 is kept at a sufficient distance (see FIG. 5). Alternatively, the entire receiving unit 120 may be arranged in such a manner, thereby protecting the matching circuit 122 which is not easily affected by the unnecessary radiation.

As shown in FIG. 6, two power supply units 1
40 and 141 are prepared, and one power supply section 140 is used in the same manner as described above, and the other power supply section 141 is connected to the high-frequency circuit 1.
A power supply line for supplying power to the control unit 110 and a power supply line for supplying power to the reception unit 120 may be provided separately as dedicated power supplies 23. Thereby, the control unit 110
The power supply line for supplying power to the power supply line and the power supply line for supplying power to the reception unit 120 can be separated at a high frequency,
It is possible to suppress transmission of the unnecessary radiation such as noise emitted from the control unit 110 or the like to the receiving unit 120 using the wiring pattern of the wiring board 150 as a medium.

As shown in FIG. 7, an inductance element (coil) 142 is provided on the power supply section 140 side of the control section 110.
May be inserted, and the inductance element 142 may be inserted on the power supply line side for supplying power to the control unit 110. As a result, the high frequency component of the noise from the control unit 110 is cut by the inductance element 142.
The power supply line for supplying power to the power supply line and the power supply line for supplying power to the reception unit 120 can be separated at a high frequency,
It is possible to suppress transmission of the unnecessary radiation such as noise emitted from the control unit 110 or the like to the receiving unit 120 using the wiring pattern of the wiring board 150 as a medium.

It should be noted that even if the inductance element 142 is inserted into the ground (ground) side of the
The power supply line for supplying power to the power supply line and the power supply line for supplying power to the reception unit 120 can be separated at a high frequency,
It is possible to suppress transmission of the unnecessary radiation such as noise emitted from the control unit 110 or the like to the receiving unit 120 using the ground line constituting the power supply line as a medium.
Of course, the inductance element 142 may be inserted on both the power supply line side and the ground side.

The antenna 121 is connected to the wiring board 150.
In addition to the above, it may be arranged in a resin case (not shown) called a housing or a visor for accommodating each part of the meter 100.

The exclusive space 151 provided around the wiring board 150 is used not only for forming the conductor antenna 121 (see FIG. 2B) but also for forming the antenna 121 made of a substantially L-shaped wire. Arrangement (see Fig. 2 (a))
Alternatively, it can be used as a dedicated space for supporting (see FIG. 2C).

[0044]

According to the present invention, the high-frequency circuit can be downsized by separately forming the antenna and the high-frequency circuit constituting the receiving section, and the antenna itself can be relatively easily arranged. Since it is possible to increase the degree of freedom when mounting the receiving unit on a wiring board or the like of the meter, it is possible to provide an in-vehicle instrument device including a low-cost receiving unit.

Further, the receiving section, in particular, the antenna and the high-frequency circuit can be arranged at a place where the electronic parts mounted on the wiring board of the meter are not easily affected by unnecessary radiation. Since the influence of the radiation is suppressed, it is possible to provide a vehicle instrument device having a built-in receiving unit having good receiving performance.

[Brief description of the drawings]

FIG. 1 is a block diagram according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the above.

FIG. 3 is a block diagram of a main part of the above.

FIG. 4 is a perspective view of an essential part of the embodiment.

FIG. 5 is a perspective view of an essential part of the embodiment.

FIG. 6 is a block diagram of a main part of the above.

FIG. 7 is a main part block diagram of the above.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 vehicle instrument (meter) 110 control unit 120 receiving unit 121 antenna 122 matching circuit 123 high-frequency circuit 130 indicating unit 131 drive circuit 132 display unit 140 power supply unit 141 power supply unit 142 impedance element 150 wiring board 200 transmission unit 300 multiplex communication line 400 electrical component unit 401 control unit 402 electrical component 500 communication interface

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01Q 1/38 H01Q 1/38 9/42 9/42

Claims (16)

[Claims] An instructing unit for performing a visual display according to various states of the vehicle, a receiving unit for receiving a radio signal from the outside and outputting a signal for controlling or communicating with the vehicle, A control unit for controlling electrical components installed in the vehicle, wherein the antenna forming the receiving unit and a high-frequency circuit are separated from each other, and the high-frequency circuit is detachable from a wiring board on which the control unit is provided. An instrument device for a vehicle, wherein the instrument device is arranged in a vehicle. 2. The vehicle instrument device according to claim 1, wherein the antenna is made of a substantially L-shaped wire and is disposed in a case that accommodates the wiring board or each of the components. 3. The antenna according to claim 1, wherein the antenna is formed by printing a conductor on the wiring board.
2. The vehicle instrument device according to claim 1. 4. The vehicle instrument device according to claim 1, wherein the antenna is made of a substantially L-shaped wire, is fixed to the high-frequency circuit, and is supported by the wiring board or the case. 5. An instrument for a vehicle according to claim 2, wherein a dedicated space for forming, disposing or supporting said antenna is provided in a peripheral portion of said wiring board. apparatus. 6. The vehicle instrument device according to claim 1, wherein the antenna is fixed to the high-frequency circuit in a chip shape. 7. The vehicle instrument according to claim 1, wherein the control unit and the electrical component are connected by a multiplex communication line, and the electrical component is controlled according to a signal from the control unit. apparatus. 8. A control unit for driving the electrical component together with the control unit is incorporated in the wiring board, and the control unit controls the electrical component according to a signal from the control unit. The vehicle instrument device according to claim 1, wherein: 9. An instructing unit for performing a visual display according to various states of the vehicle, a receiving unit for receiving a wireless information from the outside and outputting a signal for controlling or communicating with the vehicle, A control unit for controlling electrical components installed in the vehicle, wherein an antenna and a high-frequency circuit constituting the receiving unit are separated from each other, and the receiving unit is less susceptible to noise from the control unit; A vehicular instrument device characterized by being arranged in: 10. The vehicle instrument device according to claim 9, wherein the receiving unit is disposed on a surface of the wiring board opposite to a surface on which the control unit is disposed. 11. The vehicle instrument device according to claim 9, wherein the antenna and the high-frequency circuit are arranged on a surface of the wiring board opposite to a surface on which the control unit is arranged. 12. The vehicle instrument device according to claim 9, wherein the receiving unit is disposed on the wiring board at a location where a distance from the control unit is kept at a sufficient distance. 13. The vehicle instrument device according to claim 9, wherein the antenna and the high-frequency circuit are arranged on the wiring board at a position where a distance to the control unit is kept at a sufficient distance. . 14. The vehicle instrument device according to claim 9, wherein a power supply line for supplying power to the control unit and a power supply line for supplying power to the reception unit are separated in high frequency. 15. The vehicle instrument device according to claim 14, wherein a power supply line for supplying power to the control unit and a power supply line for supplying power to the reception unit are provided separately. 16. The vehicle instrument device according to claim 14, wherein an inductance element is inserted into a power supply line for supplying power to the control unit and / or a ground side.