JP2011037310A - Portable car navigation device and mounting tool thereof on vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize the satisfactory visibility of a driver by arranging a portable car navigation system for external fitting available on the market at a position most easily seen from the driver. <P>SOLUTION: A portable car navigation system on the market is attachably/detachably fitted to a front side of a meter cluster of an instrument panel of a vehicle. As a result, information on instruments displayed on the instrument panel is not seen. Thus, map information, position information on the vehicle, and information on the conditions of various kinds of vehicles taken in from an electric circuit constituting an on-vehicle network are displayed in a superposed manner on the portable car navigation system. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display device that supports driving of a vehicle such as navigation information, and in particular, a portable car navigation device that displays vehicle state information relating to driving of the vehicle, such as the speed of the vehicle and the rotational speed of the engine, and the vehicle It relates to the fittings.

  In recent years, cases of purchasing and mounting an external portable car navigation device (hereinafter referred to as “portable car navigation system”) on vehicles such as automobiles are increasing. Such portable car navigation systems are usually installed using a suction cup or the like at the center upper part of a vehicle instrument panel (also called “dashboard”).

  On the other hand, vehicles such as automobiles are provided with meter clusters for displaying vehicle state information from various sensors and switches arranged in the vehicle. Here, the meter cluster constitutes a part of the instrument panel, and as information representing the vehicle state displayed in the meter cluster, for example, vehicle speed information from a vehicle speed sensor, engine speed information Alternatively, there are door opening / closing information from the door system sensor, information on whether or not the seat belt is worn from the seat system sensor, remaining fuel information from the fuel gauge, and the like. There are information that needs to be displayed at all times and information that needs to be displayed only when a warning to the driver is required. In this meter cluster, a combination meter unit is arranged to display various information from so-called vehicle instruments.

And the information which needs to be displayed among the vehicle state information obtained from various sensors displayed on the display device of these combination meter units is strictly regulated by a law called the Road Transport Vehicle Law. Moreover, the vehicle state information is usually displayed at a position that is most easily seen by the driver.
This is quite natural from the viewpoint of manufacturers that produce and sell vehicles. According to the Road Transport Vehicle Law, the display of the vehicle speed and cumulative travel distance, and the indicator that indicates the lighting of a specific light or the indicator for warning is essential, but other vehicles The status information is an optional display item.

On the other hand, from the viewpoint of the driver, rather than looking at the vehicle speed and other vehicle status information while driving, look at the map information displayed on the car navigation device and the position of the vehicle to see where the vehicle is currently running. In some cases, it may be necessary to confirm or confirm the road conditions of the vehicle.
In such a case, the driver often sees a portable car navigation system located at a position slightly off from the front of the driver, for example, installed in the upper center of the instrument panel (on the dashboard) or in the central accessory compartment. Therefore, as a result, it becomes necessary to check the information of the portable car navigation a little away from the traveling direction of the vehicle.

  In addition, when a portable car navigation system is installed on the dashboard, the portable car navigation system itself blocks a part of the driver's view. Furthermore, on the dashboard, external light is strong, and reflected light from the inside of the vehicle is added, so that there is a problem that the display screen (usually a liquid crystal screen) of the portable car navigation system is reflected and is difficult to see.

  It seems to be the result of considering such problems, but recently, a car navigation image is additionally displayed on the screen of the combination meter unit provided in the meter cluster that displays information from the instrument of the vehicle. A vehicle display device has been proposed (see, for example, Patent Document 1).

  That is, in the technique described in Patent Document 1, a meter cluster in an instrument panel that displays vehicle state information such as the speed of a vehicle, in which an additional image such as a navigation image is arranged at a position most visible to the driver. It is displayed on the (panel frame in which the combination meter unit is arranged). Thus, by displaying the vehicle state information and the car navigation information (map information) in the same display device by dividing the screen, the visibility for the driver is improved, and safety and operability are improved. I can say that.

JP 2008-195393 A

  However, the display device described in Patent Document 1 has a horizontally long size ratio (aspect ratio) of 7: 3 or more in order to display an area for displaying an additional image and a vehicle state image. There is a problem that must be made. In other words, it is necessary to mount an integrated vehicle display device that does not meet the normal standards, so even if it is effective for large luxury vehicles, it is difficult to mount for medium or small vehicles. There was a problem.

  In view of the above problems, an object of the present invention is to display information from various sensors of a vehicle, such as a vehicle speed sensor, on an external portable car navigation system that is sold externally, and to position the portable car navigation system at a position that is most easily viewable by the driver. An object of the present invention is to provide a portable car navigation device and an attachment for attaching the portable car navigation device to a vehicle.

In order to solve the above problems and achieve the object of the present invention, the present invention captures vehicle state information detected from various sensors and switches existing as data in an in-vehicle network into a portable car navigation system, and combines the vehicle This is a portable car navigation device that can be detachably installed on the front surface of the meter unit (the front part of the meter cluster).
This portable car navigation device includes a receiving unit that captures various vehicle state information from an electric circuit that forms an in-vehicle network provided in a vehicle, map information, and the vehicle that is superimposed on the map information and captured from a GPS antenna. And a display unit including a display screen for displaying position information and various vehicle state information captured from the receiving unit. Here, the receiving unit that captures various vehicle state information means a CAN bus transceiver and controller that captures information from a CAN bus described later in FIG.

  As a preferred embodiment of the present invention, the various vehicle state information to be displayed superimposed on the above-described map information includes vehicle speed data obtained from the number of rotations of the wheels, and further various types from various sensors or switches provided in the vehicle. It includes an indicator for displaying information related to the state.

In addition, the portable car navigation device main body mounting tool of the present invention is adhesively fixed to the lower part of the meter cluster of the vehicle instrument panel with double-sided tape, and the lower part of the portable car navigation device main body is detachably fitted. And a latch plate having a latch part that is adhesively fixed to the upper part of the meter cluster of the instrument panel of the vehicle by a double-sided tape, and the upper part of the portable car navigation device body is detachably fitted. And. Furthermore, it is preferable to provide an adhesive sheet that adhesively fixes the surface opposite to the display surface of the portable car navigation device main body to the meter protection meter lens on the front surface of the combination meter unit.
Further, the fitting portion of the base plate is fitted to both ends of the lower side portion of the portable car navigation device body, and the latch portion of the latch plate is fitted to both ends of the upper side portion of the portable car navigation device body. That is, it is preferable that a region that is not fitted to the base plate and the latch plate is provided around the central portion of the upper side portion and the lower side portion of the portable car navigation device body.

According to the present invention, the vehicle state information is displayed in addition to the map information on the display unit of the portable car navigation system sold outside, and the portable car navigation system is detachably attached to the front surface of the meter cluster. The moving position becomes one place, and the visibility of the driver is improved.
Furthermore, since the portable car navigation system is not installed on the dashboard, there is no obstacle to the driver's view outside the vehicle, and safety can be improved.

  Moreover, since the portable car navigation apparatus of the present invention is arranged at a place where external light is shielded by the meter shade (meter hood) provided in the meter cluster of the instrument panel of the vehicle, There is no reflected light, and very good visibility is obtained for the driver. In general, the display device of the portable car navigation system is installed so as to have an elevation angle in a direction (up or down) that is not orthogonal to the driver's line of sight of the driver's seat. For this reason, incident light from inside and outside the vehicle is reflected by the display and does not enter the center of the visual field of the driver, and a reduction in visibility due to reflection from the display screen can be avoided.

(A) is a conventional example in which a portable car navigation system is arranged at the center upper part (on the dashboard) of the instrument panel of the vehicle, and (B) is a combination meter of the vehicle according to the embodiment of the present invention. It is the example arrange | positioned in front of a unit (in front of a driver's seat front meter cluster). It is a block block diagram for demonstrating the vehicle-mounted network system containing the portable car navigation apparatus (portable car navigation) which is the embodiment of this invention. It is a block diagram when connecting the portable car navigation system which is an embodiment of the present invention to an external device. It is a block circuit diagram which shows the built-in circuit of the portable car navigation which is the embodiment of this invention. It is a perspective view when the portable car navigation which is the embodiment of the present invention is attached in front of the combination meter unit of the vehicle. It is sectional drawing when the portable car navigation which is the embodiment of this invention is attached in front of the combination meter unit of a vehicle. It is an exploded view for demonstrating the attachment method which attaches the portable car navigation system which is the embodiment of this invention in front of the combination meter unit of a vehicle. This is an example in which all displayable vehicle state information is displayed in addition to map information and vehicle position information on a display screen of a portable car navigation system that is an embodiment of the present invention. It is the example which displayed some vehicle state information, such as map information, vehicle position information, and a speed display, on the portable car navigation display screen which is an embodiment of the present invention. In the display example of the vehicle state information in FIG. 9, it is an example in which a marker (turn signal indicator) for turning right is turned on. In the display example of the vehicle state information in FIG. 9, high beam information (high beam indicator) is turned on. This is an example in which a fuel gauge and a trip meter are displayed as vehicle state information in addition to map information and vehicle position information on a portable car navigation display screen that is an embodiment of the present invention. This is an example in which, in addition to the map information and the vehicle position information, a mark for warning the abnormality of the water temperature gauge is displayed on the portable car navigation display screen that is an embodiment of the present invention.

  The embodiment of the present invention (hereinafter referred to as “this example”) will be described in detail below with reference to FIGS.

<Location of portable car navigation system in this example>
FIG. 1A is a conventional example in which the portable car navigation system 10 is placed on the center upper part (on the dashboard) of the instrument panel 20, and FIG. This is an all-in-one portable car navigation device of this example attached in front of a meter cluster 30 constituting the unit.

  Since the portable car navigation system 10 of this example shown in FIG. 1 (B) is attached in front of the meter cluster 30, there is nothing that obstructs the driver's view outside the vehicle as compared with FIG. 1 (A). Improves. However, as shown in FIG. 1B, when the portable car navigation system 10 is arranged in front of the meter cluster 30, the combination meter unit 80 (FIG. 6) is inevitably disposed by fitting the portable car navigation system 10 into the meter cluster 30. The various vehicle state information displayed on the screen will be invisible to the driver. This is not only a problem for the driver, but it is legally not allowed to display information that is obliged to be displayed, such as vehicle speed information.

  Therefore, as shown in FIG. 1 (B), when the portable car navigation system 10 is arranged with the display screen of the meter cluster 30 blocked, it is necessary to display all necessary vehicle state information in the portable carna 10. The That is, it is legally required to display the same information as the vehicle state information displayed on the display unit of the normal combination meter unit 80 on the map information of the car navigation. However, for example, information that the driver does not need to see at all times, such as the accumulated mileage, is displayed on the combination meter unit 80 as before, and can be viewed when the portable car navigation system 10 is removed. It may not be displayed on the car navigation system 10.

<Relationship between portable car navigation system in this example and in-vehicle network>
FIG. 2 shows an example of an in-vehicle network in which the portable car navigation system 10 of the present example is connected to a CAN (Controller Area Network) bus 40 of the in-vehicle network, and vehicle state information from various sensors is taken into the portable car navigation system 10 of the present example. Is shown. In the in-vehicle network illustrated in FIG. 2, an ECU (Electric Control Unit) that is various computer systems is connected to the CAN bus 40.
The CAN bus 40 is a communication standard that is used as a standard for in-vehicle networks (ISO11898 and ISO11519). The CAN bus 40 is composed of two differential signal lines CAN_H and CAN_L as shown in the figure.

  The ECU connected to the CAN bus 40 controls the engine ECU 11 that controls the rotation of the engine, the ABS (Anti-lock Brake System) ECU 12 that controls the brake system, the transmission ECU 13 that controls the transmission, and the control around the meter panel. There are a meter & panel ECU 14, a body ECU 16 that controls various switches, and other ECUs 17. The meter & panel ECU 14 is connected to a combination meter unit 15 (same as a combination meter unit 80 in FIG. 6 described later) via various communication lines.

  A vehicle speed sensor 21 is connected to the ABS ECU 12, and the speed of the vehicle is detected by a detection signal from the vehicle speed sensor 21. The vehicle speed data detected by the ABS ECU 12 is sent to the meter & panel ECU 14 via the CAN bus 40 and converted into vehicle speed pulses 37 as indicated by arrows in the figure. The vehicle speed pulse 37 is sent to the combination meter unit 15 via a communication line.

  The meter & panel ECU 14 is connected with various sensors such as a fuel gauge and a water temperature gauge and various switches 22 such as a shift lever. Based on the detection signals of these sensors or switches, the current situation of the vehicle The vehicle state information indicating whether or not is displayed on the combination meter unit 15. Here, the “combination” of the combination meter unit 15 is a functional component of the combination meter unit 15, and an indicator representing various vehicle state information from various switches and sensors provided in the vehicle in addition to the vehicle speed data. This means that they are displayed together.

The body ECU 16 is connected to various switches 23 including a combination switch, a hazard switch, a steering switch, etc., a door system sensor 24 and a seat system sensor 25, and signals from these switches or sensors are supplied.
Further, the body ECU 16 is connected with a brake light, a direction indicator, etc. 18 and a door and seat actuator 19, and based on signals from the above-described various switches, sensors, etc., a brake light, a direction indicator, etc. 18 and the door and seat actuator 19 are controlled. Information from these switches or sensors is also sent to the meter & panel ECU 14 via the CAN bus 40, and sent to the meter cluster 30 (see FIG. 1) via the combination meter unit 15 via various communication lines. Is displayed.
The other ECU 17 is an ECU that controls operation display and operation control of radio, audio, air conditioner, and the like.

  The above is an in-vehicle network provided in a normal vehicle viewed from the CAN bus 40. In the present invention, a portable car navigation system 10 is further connected to the in-vehicle network. That is, the portable car navigation system 10 is connected to the CAN bus 40 via the vehicle diagnosis connector 26, and can capture various vehicle state information such as vehicle speed data. The vehicle speed data may be acquired by connecting the portable car navigation system 10 to a communication line connecting the meter & panel ECU 14 and the combination meter C / U 15.

<External connection of portable car navigation system in this example>
Next, based on FIG. 3, a method of connection with an external device when displaying vehicle state information on the portable car navigation system 10 of this example will be described.
As shown in FIG. 3, the portable car navigation system 10 of this example includes various connection terminals for connecting to an external device in addition to being connected to the CAN bus 40 shown in FIG. 2. For example, a terminal for taking in the power source of the portable car navigation system 10 from the power source 31 of the vehicle is provided. As this power supply terminal, a cigar lighter of a normal vehicle is used.

  In addition, the portable car navigation system 10 includes, for example, a built-in camera opening 32 at the upper front of the device, and can take in information from an external camera (not shown). Furthermore, a terminal of an antenna 33 for capturing GPS information necessary for car navigation and a USB interface 34 for connecting to a personal computer are provided. The USB interface 34 is an interface used for updating car navigation map data and transmitting data acquired when the vehicle travels to a personal computer.

  Further, a slot for inserting a memory card (such as an SD card) 36 is provided on the side surface of the portable car navigation system 10. The memory card 36 is a recording device for writing out data recorded in the portable car navigation system 10, but it goes without saying that necessary information can be read from the memory card 36 to the portable car navigation system 10.

  Further, the portable car navigation system 10 is provided with an infrared remote controller light receiving unit 35 for receiving information from an infrared remote controller 70 (see FIG. 5) described later. Although the infrared remote controller will be described later, this remote controller is mounted on the steering wheel, and an image displayed on the portable car navigation system 10 can be switched by operating the remote controller by the operator.

  In addition to the route from the CAN bus 40, the portable car navigation system 10 can capture a vehicle speed pulse 37 from a communication line connecting the meter & panel ECU 14 and the combination meter C / U 15. The vehicle speed pulse 37 is a pulse signal indicating the speed of the vehicle, and one rotation of the axle corresponds to n pulses. The number of pulses n is a pulse that is generated at a multiple of 2, 2, 4, 8,... Per rotation of the drive shaft. In the Japanese standard (JIS_D5601), 60 km / h is 637 rpm, and 10.6 pulses. / Second.

  FIG. 3 shows an example in which the display screen of the portable car navigation system 10 is divided into two, and the car navigation image is displayed on the left side and the vehicle state information is displayed on the right side. However, as will be described later with reference to FIGS. 8 to 13, necessary vehicle state information can be displayed superimposed on the map image of the car navigation system.

<Circuit configuration of portable car navigation system of this example>
Next, the circuit configuration and operation of the portable car navigation system 10 of this example will be described with reference to FIG. 4, the same components as those shown in FIGS. 2 and 3 are denoted by the same reference numerals.
As shown in FIG. 4, the portable car navigation system 10 of this example includes an electric circuit for displaying various vehicle state information in addition to a function of displaying map information and vehicle body position information necessary for a normal car navigation device. ing.

  First, a printed circuit board 50, which is the main body of the portable car navigation system 10 of this example, is connected to a pulse decoder 56 for detecting vehicle speed data, a CAN bus transceiver & controller 57 to which a CAN bus 40 is connected, and a wireless LAN antenna 33c. A wireless LAN controller 58, a GPS module 59 for connecting to the GPS antenna 33a, an AM / FM & TV tuner 65 for connecting to an optional antenna 33b, and the infrared remote controller shown in FIG. An infrared communication controller 66 for receiving a signal from the light receiving unit 35 is provided.

  Here, the pulse decoder 56 is a circuit that calculates the frequency from the vehicle speed pulse 37 (pulse signal indicating the vehicle speed), and the CAN bus transceiver & controller 57 is electrically connected to the CAN bus 40 and controls the communication protocol. Circuit. The wireless LAN controller 58 is literally a circuit for communicating with other devices via a wireless LAN, and the GPS module 59 is a circuit that receives a radio wave from a GPS satellite and measures a vehicle position. The AM / FM tuner & one-seg tuner 65 is a circuit for receiving AM / FM radio and a one-seg broadcast for television.

  The infrared communication controller 66 is a circuit for performing infrared communication with a touch pad 70 (which constitutes a switch of a remote controller) mounted on the steering wheel, as will be described later with reference to FIG. The infrared communication controller 66 is connected to the infrared remote control light receiving unit 35 built in the portable car navigation 10 and performs infrared communication with the touch pad 70 shown in FIG. The infrared remote controller light receiving unit 35 includes a remote control infrared LED and a light receiving element. The touch pad 70 is simply an input means for the remote controller, and a button switch, a dial (jog dial), a joystick, or the like can be used instead of the touch pad 70.

  Further, a power source & battery control circuit 51 connected to a power source 31 and a battery cell 71 of a vehicle such as a cigarette lighter, a display controller 52 connected to a display device 72, a touch panel controller 53 connected to a touch panel sensor 73, and a memory A memory card controller 54 connected to the card device 36a is provided. Further, a USB interface controller 63 for receiving and receiving information with an external personal computer and an external camera (not shown), and a speaker / microphone input / output for performing control of receiving an audio signal from the built-in microphone 39 and outputting it to the built-in speaker 38 A controller 64 is provided. A serial communication unit 55 connected to the built-in camera 32a is also provided.

  Here, the power source & battery control circuit 51 is a circuit that converts the input power source into an internal power source and controls the charging of the battery cell 71. The display controller 52 is a circuit that controls the display device 72, and the touch panel controller 53 is a circuit that converts an input from the touch panel sensor 73 displayed on the front surface of the liquid crystal screen of the portable car navigation system 10 into an electrical signal as switch information. It is. The speaker / microphone input / output controller 64 is an AD (analog / digital) conversion circuit, a DA (digital / analog) conversion circuit, and an amplification circuit for speaker output and microphone input.

  The memory card controller 54 is a circuit that controls the recording, reading, and erasing of data with respect to the memory card 36 (see FIG. 3) by communicating with the memory card device 36a. The USB interface controller 63 is a communication circuit for communicating with a personal computer according to the USB standard. With this USB interface controller 63, the portable car navigation system 10 can be connected to a personal computer, an external camera, or the like.

  These various controllers and modules are connected by communication lines, and are controlled by a CPU 60 provided in the main board 50 as well. A RAM 61 is connected to the CPU 60 and is a memory that temporarily stores the calculation results of the CPU 60. The flash memory 62 is a memory that does not lose its memory even when the power supply from the power source is cut off. The flash memory 62 stores a built-in program used in the portable car navigation system 10, car navigation map information, and the like.

<Mounting fixture and structure of portable car navigation system of this example>
Next, a method for attaching the portable car navigation system 10 of this example to a vehicle and a state when the portable car navigation system 10 is attached will be described with reference to FIGS.
FIG. 5 is a diagram showing a state in which the portable car navigation system 10 according to the present invention is attached to the position of the meter cluster 30 that forms part of the instrument panel 20 installed in the vehicle and is in front of the driver's seat. Further, as shown in FIG. 5, the touch pad 70 for infrared remote control communication described in FIG. The touch pad 70 constitutes a switch of an infrared remote controller, and transmits infrared rays toward an infrared remote controller light receiving unit 35 (see FIG. 3) provided in the portable car navigation 10 to perform display screen switching control. Although an infrared remote controller is used here, short-distance wireless communication means such as Bluetooth can be used instead of infrared rays. Further, the touch pad 70 is structured to rotate together with the steering wheel 88, but may be disposed on a column cover 89 of FIG. In that case, the touch pad 70 does not rotate with the steering wheel 88.

6 is a cross-sectional view of the state in which the portable car navigation system 10 is attached to the vehicle, as viewed from the side, and FIG. 7 shows the portable car navigation system 10 on the meter lens 82 of the meter unit 80 (in front of the meter cluster 30). It is a disassembled perspective view for demonstrating the method of attachment and the structure of a fixture. As shown in FIG. 6, the meter cluster 30 attached to a commercially available vehicle is arranged so as to be covered with a meter shade 83 in front of the driver's seat of the instrument panel 20. A combination meter unit 80 including a speedometer 81 is incorporated in the inner part of the meter cluster 30.
Here, the front surface of the combination meter unit 80 is partitioned from the driver's seat by a meter lens 82, and vehicle state information from various sensors and switches in the vehicle is displayed on the display screen. . In this sense, it can be said that the combination meter unit 80 represents the entire displayed instrument group.

  A meter lens 82 is arranged on the front surface of the combination meter unit 80 so that the vehicle speed and other vehicle state information are displayed in an enlarged manner. In addition, a meter shade 83a is provided on the upper portion of the meter lens 82 constituting the display unit of the meter unit 80. The meter shade 83a is for preventing external light and reflected light from entering the vehicle from entering the display screen of the meter unit 80.

  The portable car navigation system 10 of this example is disposed below the meter shade 83a. That is, as explained in FIG. 1, unlike the conventional example (FIG. 1 (A)) arranged at the upper center of the instrument panel 20 (on the dashboard), as shown in FIG. It will be arranged in front of the meter cluster 30 that constitutes a part of the installed instrument panel 20.

  Next, an attachment for attaching the portable car navigation 10 to the vehicle will be described with reference to FIG. The fixture of the portable car navigation system 10 includes adhesive tapes 84a and 84b provided for preventing slipping of the portable car navigation system 10, and a base plate 85 and a latch plate 86 to which the portable car navigation system 10 is fitted.

  The adhesive tapes 84 a and 84 b are disposed on the back surface that is the surface opposite to the display surface of the portable car navigation system 10, and the back surfaces thereof are adhesively fixed to the meter lens 82 of the meter unit 80. That is, the adhesive tapes 84 a and 84 b adhesively fix the back surface of the portable car navigation system 10 to the display surface of the meter lens 82.

  The base plate 85 includes a plate main body 85a formed of a substantially rectangular plate body, and joint portions 85b and 85c protruding from the surface of the plate main body 85a. The plate body 85a has a lower part 83b of the meter cluster 30 extending in front of the meter lens 82 by a double-sided tape 87a affixed to the back surface (a part of the instrument panel 20, and an upper meter shade 83a Adhesive and fixed to the opposite part) (see FIG. 6). The joining portions 85b and 85c are provided at both ends in the longitudinal direction of the plate body 85a. Both ends of the lower side portion of the portable car navigation system 10 are detachably fitted to the joint portions 85b and 85c.

  The latch plate 86 includes a plate body 86a made of a substantially rectangular plate and latch portions 86b and 86c protruding from the surface of the plate body 86a. The plate body 86a is adhesively fixed to the upper portion of the meter lens 82 by a double-sided tape 87b attached to the back surface (see FIG. 6).

  The latch portions 86b and 86c of the latch plate 86 are provided at both ends in the longitudinal direction of the plate body 86a. Then, both ends of the upper side portion of the portable car navigation system 10 are detachably fitted to the latch portions 86b and 86c. In other words, the base plate 85 and the latch plate 86 are configured to sandwich the portable car navigation system 10 between the joint portions 85b and 85c and the latch portions 86b and 86c.

  The latch plate 86 is made of, for example, PC (Polycarbonate) resin or ABS resin (thermoplastic resin made of acrylonitrile, butadiene, styrene) or the like, and the latch portions 86b, 86c can be bent and deformed in the vertical direction. It has become. Therefore, the portable car navigation system 10 can be easily attached to the fixture by pushing the upper side part after fitting the lower side part of the portable car navigation system 10 to the mating parts 85b and 85c of the base plate 85. Then, by pulling the upper side of the portable car navigation system 10, the portable car navigation system 10 can be easily detached from the fixture.

  Further, the joint portions 85 b and 85 c and the latch portions 86 b and 86 c are fitted to both end portions of the upper side portion and the lower side portion of the portable car navigation system 10. Therefore, when the portable car navigation 10 is attached or detached, the middle part of the upper side and the lower side of the portable car navigation 10 can be gripped, and the posture of the portable car navigation 10 can be stabilized.

<Example of display screen of portable car navigation system in this example>
Next, a display example in which the vehicle state information is displayed together with the car navigation information using the portable car navigation system 10 of this example attached to the vehicle by the method shown in FIGS. 5 to 7 will be described with reference to FIGS. . Note that this display example is merely an example, and each car navigation maker can freely set at which position on the display screen and in what size the vehicle state information is displayed. In addition, as shown in FIG. 3, the screen of the portable car navigation system 10 can be divided into two or three parts, and a car navigation image and vehicle state information can be displayed in each divided area.

  FIG. 8 is a diagram showing an example of vehicle state information that can be displayed on the portable car navigation system of this example. As shown in FIG. 8, the vehicle status information includes a speed display 90 such as “60 km / h”, a fuel gauge 92, a light-up warning lamp 93, a battery warning display 94, an oil system warning 95, a water temperature gauge warning 96, A side brake warning 97, an engine system abnormality warning 98, left and right indicators 99a and 99b of the direction indicator, and the like are displayed. The example shown in FIG. 8 is merely an example, and besides this, various vehicle state information can be displayed as necessary or according to user preferences. Note that FIG. 8 does not include a column for displaying the total travel distance of the vehicle, but this total travel distance is a combination meter unit arranged at the position of the meter cluster 30 (FIG. 1) provided in the vehicle. 80 is displayed on the display screen. Therefore, if the portable car navigation system 10 is removed, the portable car navigation system 10 can be viewed at any time. Therefore, here, the display column of the accumulated travel distance is not provided on the display screen of the portable car navigation system 10.

  In the portable car navigation system 10 of this example, the vehicle state information as described above is displayed superimposed on a car navigation image such as map information. In addition to this, the vehicle position information 100, the following A distance display 101 to the intersection, a car navigation mode display 102, a magnetic needle 103 indicating north and south, and a current time 104 are displayed.

  FIG. 9 shows the most basic case. In addition to the map and the car navigation information of the vehicle position information 100, only a speed display 90 and left and right direction indicator indicators 99a and 99b are displayed. FIG. 9 shows a case where the direction indicator is not operating. In this case, only the skeleton (outer frame of the arrow) of the direction indicator is displayed and the map can be seen through. Yes.

FIG. 10 is a diagram showing a state in which the right turn indicator is operated from the basic case shown in FIG. The indicator 99b of the right direction indicator is changed from the display of only the skeleton (outer frame of the arrow) to the display in which the entire arrow is colored (filled display). In this case, the display of the indicator 99b expresses a blinking state explicitly by alternately repeating a display colored with a skeleton at regular time intervals.
FIG. 11 shows an example in which an icon 93 for notifying a high beam is displayed on the screen of the portable car navigation system 10. When the light is turned on at night, it is very annoying for the driver of the oncoming vehicle if the light becomes a high beam. In such a case, a warning is displayed to inform the driver that the high beam is being used.

  Note that examples of warning indications other than the high beam include those notifying the lighting display of the vehicle width lamp and the taillight, and notifying the lighting display of the fog lamp, although not shown. Icons as indicators for informing these warnings are defined by JIS, and icons indicating these lighting can be displayed on the display screen of the portable car navigation system 10.

FIG. 12 shows an example in which items to be displayed as options are set and selectively displayed according to the driver's preference. Here, an example in which a trip meter 91 and a fuel gauge 92 are displayed is shown. In addition to these displays, an engine tachometer, water temperature gauge, oil pressure gauge, or the like may be selected and displayed depending on the driver's preference.
FIG. 13 shows an example of a warning display when an abnormality in the water temperature occurs during traveling in the state shown in FIG. A warning indicator 96 indicating a water temperature abnormality is displayed.

  As other warning indicators, as shown in FIG. 8, an indicator 94 for notifying a battery abnormality, an indicator 95 for indicating a hydraulic abnormality, an indicator 97 for indicating a brake abnormality, an indicator 98 for indicating an engine abnormality, and the like are conceivable. Note that these alarm indicators are displayed only when there is an abnormality, and it is not possible to set operation conditions and display conditions as options.

  The portable car navigation system according to the embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and is not limited to the scope of the invention described in the claims. Various modifications and application examples are included.

DESCRIPTION OF SYMBOLS 10 ... Portable car navigation system, 20 ... Instrument panel, 30 ... Meter cluster, 40 ... CAN bus, 11 ... Engine ECU, 12 ... ABS ECU, 13 ... Transmission ECU, 14 ... Meter panel ECU, 15, 80 ... Combination meter unit, 16 ... Body system ECU, 21 ... Vehicle speed sensor, 34 ... USB interface, 35 ... Infrared remote control light receiving unit, 33 ... Various antennas, 56 ... Pulse decoder, 59 ... GPS module, 60 ... Central processing unit (CPU), 66 ... Infrared communication controller, 70 ... Touchpad, 84 ... Adhesive plate, 85 ... Base plate, 86 ... Latch plate, 87 ... Double-sided tape, 88 ... Steering wheel, 90 to 99: Indicators of various vehicle state information, 101: Distance to intersection, 102: Car navigation mode, 103: Magnetic needle indicating north and south

Claims (8)

A portable car navigation device that can be detachably installed on the front surface of a vehicle combination meter unit,
A receiving unit that captures various vehicle state information from an electric circuit constituting an in-vehicle network provided in the vehicle;
A display unit including a display screen for displaying map information, positional information of the vehicle superimposed on the map information and captured from a GPS antenna, and various vehicle state information captured from the reception unit;
A portable car navigation device comprising:   The portable car navigation device according to claim 1, wherein the display unit displays an indicator indicating the various vehicle state information on the display screen so as to be superimposed on the map information.   The portable information according to claim 1 or 2, wherein the various vehicle state information includes vehicle speed data obtained from a rotational speed of a wheel and information indicating the state of the vehicle from various sensors or switches provided in the vehicle. Car navigation device. A touchpad for performing a remote control operation for switching the display screen;
The portable car navigation device according to claim 1, wherein the touch pad is detachably attached to a steering hole of the vehicle. A base plate having a fitting portion that is adhesively fixed to the lower front portion of the meter cluster of the instrument panel of the vehicle by a double-sided tape, and the lower side portion of the portable car navigation device body is detachably fitted;
A latch plate having a latch portion that is adhesively fixed to an upper portion of a meter cluster of the instrument panel of the vehicle by a double-sided tape, and an upper side portion of the portable car navigation device body is detachably fitted;
A portable car navigation device fixture comprising:   The portable car navigation device according to claim 5, further comprising an adhesive sheet that adhesively fixes a surface opposite to a display surface of the portable car navigation device main body to a meter protection meter lens surface in front of the combination meter unit. Fittings.   The fitting part of the portable car navigation device according to claim 5 or 6, wherein the fitting portion of the base plate is fitted to both ends of a lower side portion of the portable car navigation device main body. The latch part of the said latch plate is a fixture of the portable car navigation apparatus in any one of Claims 5-7 fitted to the both ends of the upper side part of the said portable car navigation apparatus main body.