JPH08276764A - On-vehicle meter device - Google Patents

Abstract

PURPOSE: To realize simplification of a system total unit and reduction of a cost by enabling an amount of use to reduce of harness with an electronic part and circuit board in common use, while an option unit can be concentrically arranged in the vicinity of a meter panel. CONSTITUTION: A device comprises a meter use printed board 23A having a display part 4A of meter or the like and a basic electrical accessory unit necessary for operation and safety of a vehicle and a child substrate 62 having an option electrical accessory unit 64. The child substrate 62 is arranged in a reverse side of the meter use printed board 23A, to connect each circuit of the child substrate 62 and meter use printed board 23A by a connector.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted meter device for centrally mounting a display portion such as a speedometer and electronic circuits required for vehicle operation on a circuit board on the meter display panel side of the vehicle. is there.

[0002]

2. Description of the Related Art As a conventional vehicle-mounted meter device, for example, there is one as shown in FIG. In the figure, reference numeral 1 is a lower housing, and a speed indicator unit 3, a tachometer unit 4, a fuel level gauge unit, which are installed in parallel with a trip indicator 2 in the front portion of the lower housing 1, and in which a drive circuit is incorporated. 5 and the water temperature gauge unit 6 can be mounted.

Further, 7 to 10 are each of these units 3 to
Light guides 11 to 14 arranged around the front of 6 are arranged in front of the light guides 7 to 10 and around the central axes of the speedometer unit 3, the tachometer unit 4, and the gauge units 5 and 6. And a scale plate 15 to be transmitted and illuminated by the light guides 7 to 10.
Reference numeral 18 is a pointer attached to the central axis, and reference numerals 19 and 20 are dial plates for displaying a warning.

Further, 21 is an upper housing mounted on the front opening side of the lower housing 1 on which the units 3 to 6, the light guides 7 to 10 and the scale plates 11 to 14 are mounted, and 22 is an upper housing 21. It is a transparent front cover that covers the surface of the.

On the rear side of the lower housing 1, a flexible printed circuit board 23 for a meter, on which a power supply line connected to each of the units 3 to 6 and the meter control circuit is printed, is attached. A plurality of lamps 24 for indicators, warnings, dials, and scale plates are mounted on the printed circuit board 23 for the meter from the back side by bayonet mounting, and the light guides 7 to 7 arranged in the lower housing 1 to. From the rear of 10, scale plates 11 to 14 and dials 19 and 2
The light is guided to the 0 side so that it can be projected.

In the conventional vehicle-mounted meter device, the speedometer unit 3, the tachometer unit 4, and the fuel level gauge unit 5 are set with the lower housing 1 as a reference.
And the water temperature cage unit 6 is assembled respectively.

Here, each of the units 3 to 6 has its own dedicated control circuit board, has its own independent control circuit, and the crossing coil is arranged on each of these dedicated control circuit boards.

In the electrical connection of the units 3 to 6, for example, the meter printed circuit board 23 is mounted on the back side of the lower housing 1, and the vehicle harness connector is fitted into the lower housing 1 from the rear side thereof. As a result, an assembly procedure is adopted in which power is supplied to each lamp 24 by connecting to the meter printed circuit board 23, a control circuit board for each unit is attached, and the control circuit and the cross coil are sequentially connected. To be

FIG. 8 schematically shows the arrangement of the units 3 to 6 and the trip indicator 2 in the lower housing 1 as seen from the rear side of the meter printed circuit board 23. In FIG. Is a speedometer control unit including speedometer-related parts such as the speedometer unit 3 and the control IC element 25, which are collectively provided on the speedometer unit 3 side.

Further, the tachometer unit 4, the control IC
The tachometer control unit B including the tachometer-related parts such as the element 26 is collectively provided on the tachometer unit 4 side.

On the other hand, a door lock timer 33 having its own control circuit board (not shown) is provided around the vehicle-mounted meter device P as shown in FIGS. 7 and 9.
The wiper amplifier 31 and the alarm unit 35 are separately and independently provided as a meter peripheral arrangement unit, and in addition to this, a seat belt timer, a shift lock, a rear defogger timer, an auto light, a key illumination timer, etc. In-vehicle electronic unit).

That is, among these units arranged around the meter, the wiper amplifier 31 is installed on the engine room side together with the wiper motor 32 as shown in FIG. 9, and the door lock timer 33 is installed on the dash side, such as a motor (not shown). The door lock actuator is arranged inside the door, and the alarm unit 35 is arranged below the meter panel.

Further, the wiper amplifier 31, the wiper motor 32, the door lock timer 33, the door lock actuator 34 and the alarm unit 35 are respectively different from the wiper switch 36, the door lock switch 37 and the key switch 38 as shown in FIG. Electrically connected to.

In the circuit shown in FIG. 10, the wiper amplifier 31, the door lock timer 33 and the alarm unit 35 are provided.
Uses a battery power supply 40 and a grounding circuit, which are supplied via an ignition switch 39, in common with the vehicle-mounted meter device P. Further, a wiper amplifier 31 and a door lock timer 33 include a vehicle speed sensor 41 and a vehicle-mounted meter. The circuit for vehicle speed signals connected between the devices P is shared. That is, the door lock timer 33 and the wiper amplifier 31 can be controlled by using (detecting) the vehicle speed signal.

The alarm unit 35 receives power from the battery power source 40 via the light switch 42.
Further, various signals for display, alarm, etc. are input to the vehicle-mounted meter control unit P via a plurality of switches 43.

As described above, in the conventional vehicle-mounted electric system, the meter printed circuit board 23 of the vehicle-mounted meter device and the vehicle-mounted electronic units such as the peripheral units of each meter have the same circuit and power source. As shown in 9,
Placed as separate units in different parts,
Electrically connected by harness.

[0017]

Since the conventional vehicle-mounted meter device is configured as described above, it is possible to use a common circuit as a power supply circuit or a signal circuit, but to use each device or unit. Since the harness is arranged and has its own circuit board for signal interface, electronic parts and case, there are practical problems such as an increase in cost due to duplication of the harness and circuit components.

Further, the vehicle is commonly used for each vehicle type, and is provided with a display unit such as the above-mentioned meter and the like, and a basic electrical unit including electronic components, electronic circuits, and wiring which are basically necessary for operation and safety. In addition, it has an electric circuit that connects optional units such as keyless switches and auto lights according to the purchase request of the vehicle.Each unit has its own circuit board and harness, so the electric circuit There was a problem that the connection became complicated.

Further, a display unit such as a meter and a display drive unit for driving the display unit are provided on the circuit board on the display panel side for the meter. Control for controlling the operation of the display drive unit is provided. Since the circuit section is provided inside the display panel, for example, inside the dashboard, there is a problem that the wiring connecting the control circuit section and the display driving section and the harness are congested on the display panel side together with other wiring.
Note that the option unit here means one that is set as an option in a catalog or the like, or one that has low commonality between vehicle types.

The present invention has been made by paying attention to the above-mentioned problems, and the option units are separately arranged on a separate board and arranged centrally, and are separated from the meter printed board by a connector on the back surface of the meter board. By making an electrical connection,
An object of the present invention is to obtain a vehicle-mounted meter device that can reduce the amount of harness used by sharing electronic parts and circuit boards, and can realize simplification of the entire system and cost reduction.

Further, according to the present invention, a control circuit can be centrally arranged on the back surface of a meter printed circuit board having a display section and a display drive section, and the cost of the entire system can be reduced and the circuit connection can be simplified. Aim to get.

[0022]

According to a first aspect of the present invention, there is provided a vehicle-mounted meter device, which is a basic electric component unit for producing a control signal which is not related to a meter display circuit section and a meter display and which has high commonality between vehicle types. A meter printed circuit board in which the control circuit section is divided and arranged, and a child board having an option unit control circuit that creates a control signal having low commonality between vehicle types are provided. It is arranged on the back side of the board, and each circuit of the child board and the meter printed board is connected by a connector.

In the vehicle-mounted meter device according to the second aspect of the present invention, the first basic electrical component unit control circuit unit for producing a control signal which is not related to the meter display circuit unit and the meter display and has high commonality between vehicle types is provided. A meter printed circuit board arranged in a divided manner, a second basic electrical equipment unit control circuit section different from the first basic electrical equipment unit control circuit section arranged on the meter printed circuit board, and a control signal having low commonality between vehicle types A sub-board having an option unit control circuit for creating the sub-board, the sub-board being arranged on the back side of the meter printed board, and the respective circuits of the sub-board and the meter printed board being connected by connectors.

[0024]

The vehicle-mounted meter device according to the invention of claim 1 requires a control circuit having high commonality between vehicle types, such as a door lock timer, a wiper amplifier, and an alarm unit, for operation and safety of the vehicle. , This is centrally arranged on the printed circuit board for meters, and the optional unit control circuit with low commonality between vehicle models such as keyless door locks, auto lights, etc. other than the basic electrical equipment unit is used as an optional unit to print the above meter. By arranging them collectively on the sub-board attached to the back side of the board, the ground area between the control circuit and the display drive section is shared and orderly circuit connection is possible.

A vehicle-mounted meter device according to a second aspect of the present invention requires a control circuit having a high degree of commonality between vehicle types, such as a door lock timer, a wiper amplifier, and an alarm unit, for operation and safety of the vehicle. , This is centrally arranged on the printed circuit board for meters, and part of the option unit control circuit, which has low commonality among vehicle models such as keyless door locks and auto lights other than the basic electrical equipment unit, is separated from the basic electrical equipment unit. Then, separate boards are provided, and by connecting these with connectors, the installation area of the control circuit and the display drive section is shared, and circuit connection is possible in an orderly manner.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 23A is a rigid printed circuit board for a meter, and the printed circuit board 23A for a meter includes a cross coil 3A for a speedometer, a cross coil 4A for a tachometer, a cross coil 5A for a fuel level gauge, and a cross coil for a water temperature gauge. A trip indicator 2, a display unit such as the meters and gauges, and a meter control unit C for controlling the drive of these display units are attached together with a display unit such as 6A.

Of these, the meter control section C is
A circuit is mounted in a region surrounded by a dotted line on the speedometer crossing coil 3A on the meter printed circuit board 23A.

On the other hand, a wiper amplifier, a door lock timer,
Among the units around the meter, such as an alarm unit, a seat belt timer, a shift lock, a power antenna timer, a rear defogger timer, an auto light, and a key illumination timer, a wiper amplifier 31, a door lock timer 33, and an alarm unit as shown in FIG. The meter peripheral arrangement unit D including 35 and the like is circuit-mounted on the back surface of the meter printed circuit board 23A on the side of the tachometer crossing coil 4A.

In addition, the same components as those shown in FIG. 8 or components equivalent to those shown in FIG. 8 are designated by the same reference numerals, and a duplicate description thereof will be omitted.

Therefore, in this embodiment, the basic electrical equipment units (first basic electrical equipment unit) such as the wiper amplifier 31, the door lock timer 33, and the alarm unit 35 shown in FIG. It is mounted on the tachometer crossing coil 4A side that does not interfere with the trip indicator 2 on the meter crossing coil 3A side, that is, on the left half of the meter printed circuit board 23A.

As a result, the meter control section C is distinguished on the meter printed board 23A without preparing a control circuit board for each wiper amplifier 31, door lock timer 33 and alarm unit 35 as shown in FIG. By arranging the respective control circuits (basic electrical equipment units) side by side, the wiper motor, door lock actuator, etc. are left in the engine room and the door, etc., and these control circuits such as the wiper amplifier 31 and the door lock timer 33 are connected by the wire harness. And are only connected via the connector 28.

As described above, the printed circuit board 2 for the meter is used.
3A has crossing coils 3A, 4A, 5A, 6A of each meter.
In addition to the display circuit section such as, the wiper amplifier 31, the door lock timer 33, etc., which are required for the operation and safety of the vehicle, are equipped with basic electrical components that are highly common to each vehicle type, especially between small vehicle types. There is.

On the other hand, a plurality of mounting bosses 61 as shown in FIG. 2 are provided upright on the back side of the above-mentioned meter printed circuit board 23A.
It is fixed by 3.

On this child board 62, an optional electric component unit (second basic electric component unit) of an operating circuit such as a keyless or auto light which is not commonly provided for each car type, for example, is highly common to medium-sized car types and large-size car types. ) 64 is provided.

Next, with reference to FIGS. 2 and 3, the configuration of the vehicle-mounted meter device having the child board 62 will be described more specifically.

First, at one side edge of the child board 62, as shown in FIG.
, A terminal portion 66 having a circuit pattern 65 is integrally formed, and the circuit pattern 65 of the terminal portion 66,
A connector 67, to which a harness for transmitting a dedicated control signal is connected, is fitted and connected between an external circuit (not shown) including an actuator and the like and the optional electric component unit 64.
Therefore, the connector 6 is provided on the side surface of the recess 55 of the cover 53.
7 insertion holes 68 are provided.

A circuit that can be commonly used by the optional electric component unit 64 and each circuit on the meter printed circuit board 23A is connected to the child board 62 through a connector 69 called a bottom entry connector.

As shown in FIGS. 5 and 6, the connector 69 has a terminal block 71 having a connector pin 70 connected to each of the circuit patterns 65 of the subsidiary board 62 by soldering at one end thereof, and the meter block described above. A substantially U-shaped spring terminal 73 provided around a plurality of pin holes 72 formed in the printed circuit board 23A and having one end connected to each circuit pattern on the meter printed circuit board 23A, and this spring terminal 7
A terminal block 74 which holds a part of the connector 3 on the front surface of the meter printed circuit board 23A and which allows the end of the connector pin 70 inserted through the pin hole 72 as shown in FIG. Consists of.

Further, on the front side of the meter printed circuit board 23A, as described above, the display portions such as the meters and the wiper amplifier 31, which is necessary for the operation and safety of the vehicle,
A basic transmission unit such as the door lock timer 33 and the alarm unit 35 common to each vehicle type is mounted as an electronic component such as one IC element or a plurality of IC elements.

FIG. 3 is an exploded perspective view showing a vehicle-mounted meter device including the rigid printed circuit board for meter 23A shown in FIG. 1. In this embodiment, it is mounted on the printed circuit board for meter 23A as described above. Insertion holes 51, 5 through which the speedometer crossing coil 3A, the tachometer crossing coil 4A, the gauge crossing coils 5A and 6A, the trip indicator 2, the lamp 24, etc. are simultaneously penetrated.
2 is provided on the back side of the lower housing 1A.

The meter printed circuit board 23A is attached to the rear surface of the lower housing 1A.
Further, a cover 53 covering the meter printed circuit board 23A from the back side can be mounted on the back side of the lower housing 1A. In addition, each lamp 2 is attached to the cover 53.
4 is formed with a through hole 54 and a recess 55 for accommodating the child board 62 attached to the back surface of the meter printed board 23A.

A trip indicator 2 is arranged at the front of the lower housing 1A.
The light guides 7 to 10 and the scale plates 11 to 1 are attached to the drive shafts of the crossing coils 3A to 6A projecting from the front to the front.
The pointers 15 to 18 are attached via 4.

The lower housing 1A covers the front portions of the scale plates 11-14 and the pointers 15-18.
An upper housing 21 is mounted on the front part of the, and a front cover 22 is mounted on the front part of the upper housing 21.

As described above, in this embodiment, a plurality of meter peripheral arrangement units having a common circuit and power supply with the above-mentioned meter printed circuit board 23A are provided on one rigid printed circuit board for a meter together with various meters and a meter controller. D (corresponding to the basic electrical equipment unit) is installed together, and these plural meter peripheral arrangement units D are integrated,
It is provided on the tachometer crossing coil 4A installation side of the meter printed circuit board 23A, while the original meter control unit C is provided on the speedometer crossing coil 3A installation side to reduce costs by sharing the power supply circuit, harness and the like. Assembling work can be facilitated.

In the present invention, in particular, the sub-board 62 having the optional electric component unit 64 is attached to the back side of the meter printed circuit board 23A having the meter peripheral unit D, the meter control section C, etc. In addition to the basic electrical unit 75 common to all, optional electrical units such as optional components and circuits selected according to customer's wishes (the larger the vehicle model, the more common electrical units increase) in one place. It can be arranged collectively on the display panel side.

Therefore, the power supply circuit of the basic electric component unit 75 can be shared, the cost can be reduced and the assembling work can be facilitated by replacing the harness through which the common signal is passed with the circuit pattern and deleting the harness. It is also possible to centrally protect and manage the circuits required for operation and optionally added circuits on the display panel side.

In the above embodiment, the basic electric component unit 75 is provided on the meter printed circuit board 23A and the optional electric component unit 64 is provided on the sub-board 62. However, the basic printed circuit unit 23A is provided on the meter printed circuit board 23A. In place of the electric component unit 75, a display unit such as a meter having a relatively large number of circuits and wirings and a display drive unit for driving this display unit are provided, while the sub-board 62 is replaced by the optional electric component unit 64. Then, a control circuit of the display drive unit (partly corresponding to the meter control unit C) having a relatively small number of wires may be installed.

In this way, it is possible to minimize the number of circuits that connect the meter printed circuit board 23A and the daughter board 62 via the connector 69, enable separate placement and wiring for each circuit function, and perform assembly work, Wiring management, maintenance and inspection work can be facilitated.

Although not shown, one of the display units is
When the segments are provided, at least one digit requires seven circuits, so it is desirable to provide the seven segments on the meter printed circuit board 23A side.

In the above embodiment, the control circuit for the speedometer, the tachometer, the water temperature gauge and the fuel level gauge is provided on the meter printed circuit board 23A, but the control circuit for only the speedometer and the tachometer is provided. It may be provided within a predetermined narrow area.

[0051]

As described above, according to the first aspect of the present invention, the basic electrical unit control circuit section for producing a control signal which is not related to the meter display circuit section and the meter display and has a high commonality between vehicle types. A printed circuit board for a meter and a sub circuit board having an option unit control circuit for producing a control signal having low commonality between vehicle types, and the sub circuit board is provided on the back side of the printed circuit board for the meter. Since it is configured so that each circuit of the sub-board and the meter printed circuit board is connected by a connector, the optional electrical component unit can be centrally located on the back side of the meter printed circuit board and the harness can be shared by electronic components and circuit boards. It is possible to reduce the amount of use of the system and to achieve simplification and cost reduction of the entire system.

According to the second aspect of the present invention, the meter display circuit section and the first basic electrical unit control circuit section, which is not related to the meter display and produces control signals having a high commonality between vehicle types, are arranged separately. A printed circuit board for a meter, a second basic electrical unit control circuit section different from the first basic electrical unit control circuit section arranged on the printed circuit board for the meter, and an option for creating a control signal having low commonality between vehicle types A child board having a unit control circuit,
The sub-board is disposed on the back side of the meter printed circuit board,
Since each circuit of the sub-board and the meter printed circuit board is configured to be connected by a connector, the control circuit can be centrally arranged near the meter printed circuit board having the display section and the display drive section, and the cost of the entire system can be reduced. There is an effect that what can realize simplification of circuit connection is obtained.

[Brief description of drawings]

FIG. 1 is a rear view showing a meter printed circuit board of a vehicle-mounted meter device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing details of a vehicle-mounted meter device according to the present invention.

FIG. 3 is an exploded perspective view showing details of a vehicle-mounted meter device according to the present invention.

FIG. 4 is an explanatory view showing a mounting structure of the daughter board to the meter printed board according to the present invention.

FIG. 5 is an enlarged plan view of an essential part showing the unconnected state of the connector according to the present invention.

FIG. 6 is an enlarged plan view of an essential part showing a connected state of the connector in the present invention.

FIG. 7 is a perspective view showing an entire conventional vehicle-mounted meter device.

FIG. 8 is a rear view showing a conventional printed circuit board for a meter.

FIG. 9 is a perspective view showing an example of installation of a conventional meter peripheral arrangement unit.

FIG. 10 is a circuit diagram showing an electric circuit connected between a conventional printed circuit board for a meter and a meter peripheral arrangement unit.

[Explanation of symbols]

 3A Speedometer crossing coil (display section) 4A Tachometer crossing coil (display section) 5A Fuel level gauge crossing coil (display section) 6A Water temperature gauge crossing coil (display section) 23A Meter printed circuit board 62 Sub-board 64 Optional electrical unit 75 Basic electrical unit

Claims (2)

[Claims] 1. A printed circuit board for a meter, in which a meter display circuit section and a basic electrical unit control circuit section for generating a control signal having a high commonality between vehicle types regardless of the meter display are arranged separately. A sub-board having an option unit control circuit for creating a control signal having low commonality between vehicle types, the sub-board being arranged on the back side of the meter printed board, and each of the sub-board and the meter printed board. A vehicle-mounted meter device with a circuit connected to a connector. 2. A printed circuit board for a meter, in which a meter display circuit section and a first basic electrical unit control circuit section for producing a control signal having high commonality between vehicle types regardless of the meter display are arranged separately. And a second basic electric component unit control circuit part different from the first basic electric component unit control circuit part arranged on the meter printed circuit board and an option unit control circuit for generating a control signal having low commonality between vehicle types. A vehicle-mounted meter device comprising a substrate, the sub-board being disposed on the back side of the meter printed circuit board, and the circuits of the sub-board and the meter printed circuit board being connected by connectors.