JPH09126788A - Navigation device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically select a CD-ROM corresponding to a current position from a plurality of CD-ROMs by switching a plurality of external information storage media having different degrees of detail to an external information storage medium having detailed map information corresponding to the current position information of a vehicle. SOLUTION: When a destination is inputted, the entire control part 11 of an arithmetic control part 10 searches a path from a current position to the destination. Information about the searched path and map information corresponding to the current position are stored in a first map information storage part 19A. While the path information and the map information are displayed on a display device 20 based on the storage part 19A, the information of an external information storage medium different from a national CD-ROM 6 used by the storage part 19A may be needed. For example, when the external information storage medium is changed from the national CD-ROM 6 to a local CD-ROM 7, after storing in the storage part 19A, reading of the former is canceled and the latter is selected by a storage medium selecting.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is mounted on a vehicle,
The present invention relates to a vehicle navigation device that searches for a route from a starting point to a destination, and more particularly to a vehicle navigation device that can efficiently replace a plurality of compact disc read only memories (CD-ROM).

[0002]

2. Description of the Related Art In a conventional navigation device mounted on a vehicle, a CD-R is installed in the navigation unit.
There are two types: a type that holds one OM and a CD changer type that stores multiple CD-ROMs. There are also two types of CD-ROMs: a type that stores national map data on one CD (national version) and a type that stores more detailed map data than the national version only for some areas (regional version). is there.

In the case of using these two types of CD-ROMs, the driver manually replaces the CD-ROMs as needed in the one-piece type hard unit. Also, when using a CD changer type hard unit, the CD-ROM is replaced because the CD changer automatically replaces the disc.
There is no need to manually replace the.

[0004]

However, even if the CD changer automatically replaces the above-mentioned CD-ROM, for example, when the destination is set by the national version of the CD-ROM and route guidance is received. , If you want to get information near the destination using the detailed map data of the regional version, you need to set the destination again or search the route again.

As described above, when the national version of the CD-ROM and the regional version of the CD-ROM are used together, the CD-RO
It is necessary to manually replace M, and since the data of the first used disk is not maintained in the replaced disk, there is a problem that it is necessary to set again (destination setting, route search, etc.). . In addition, when there are a plurality of CD-ROMs corresponding to the current position of the vehicle and the destination to be input, for example, in addition to the national version of the CD-ROM and the regional version of the CD-ROM, a tourist CD-ROM is also available.
All types of CD-Rs such as CD-ROMs for each application
Although there is an OM, when using the navigation device, the driver previously uses the CD-RO corresponding to the current position of the vehicle.
It is necessary to select and set M manually or from the number or name of the displayed CD-ROM, and the operation is complicated and complicated.

The present invention has been made to solve the above problems.
CD that corresponds to the current position of the vehicle from multiple CD-ROMs
-An object of the present invention is to provide a navigation device which is capable of automatically selecting and setting a ROM and which is easy to operate.

[0007]

In order to achieve the above object, the present invention provides: (1) a vehicle navigation device comprising a plurality of external information storage media having different levels of detail of map information, In response to the information, the external information storage medium currently used is switched to the external information storage medium having detailed map information.

(2) In the vehicle navigation device, a current position detecting means for detecting the current position of the vehicle, a plurality of external information storage media for storing map information, and a management means for managing the external information storage medium, Control means for comparing at least one external information storage medium managed by the management means with information about the current position of the vehicle to select at least one external information storage medium corresponding to the current position of the vehicle, and the selection thereof. And a means for changing to one of the external information storage media that has been issued.

(3) In the vehicle navigation device, a current position detecting means for detecting the current position of the vehicle, a plurality of external information storage media for storing map information, and a management means for managing the external information storage medium, Control means for comparing information of a plurality of external information storage media managed by the management means with information of the current position of the vehicle to select one external information storage medium corresponding to the current position of the vehicle;
A first map information storage unit for storing route information corresponding to the current position of the vehicle based on the map information medium of the external information storage medium, and an external unit excluding the first external information storage medium selected by the control unit. Means for changing from the information storage medium to one second external information storage medium corresponding to the current position of the vehicle, and a route corresponding to the current position of the vehicle based on the changed map information of the second external information storage medium Second map information storage means for storing information, switching means for switching map information in response to the switching request for map information, and second map information storage from the first map information storage means when there is a switching request by the switching means. Switch to means, second
And an output unit for outputting the route information of the map information storage unit.

(4) In the vehicle navigation device according to (2) or (3) above, when the control means selects a plurality of external information storage media, one external information is externally selected from the plurality of external information storage media. The selection means for selecting the storage medium and the external information storage medium selected by the selection means are changed.

[0011]

As described above in detail, according to the present invention, in the navigation device mounted on the vehicle, the CD-RO which can be activated according to the current position of the vehicle.
It is possible to select M, and it is possible to accurately provide the guide information according to the user's request.

While the vehicle is traveling using the national version CD-ROM, it is determined that the map area of the regional version CD-ROM is approached, and the information of the regional version CD-ROM is read in advance to reach the destination. By storing the route information of the CD in a storage means such as a RAM, the user can perform detailed regional version CD.
-When it is requested to switch to the ROM, it is possible to immediately switch to the required map information, and it is possible to provide timely information and improve operability.

In addition to the map disc, the ski guide C
A CD-ROM, such as a D-ROM or a CD-ROM for tourist information, can be selected according to the user's purpose and can be appropriately selected according to the current position of the vehicle and the destination.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. Hereinafter, preferred embodiments of the navigation device of the present invention will be described in detail with reference to FIGS. 1 to 9. FIG. 1 shows a system configuration of a navigation device according to an embodiment of the present invention.

As shown in FIG. 1, this navigation device has an arithmetic control unit 10. This arithmetic control unit 1
0 is a display functioning as a touch panel,
A display device 20 including an operation switch provided around the display and a switch input management unit 17 that manages an input from a touch panel or a switch of the display device 20 are connected.

The switches include various switches such as a switch for designating a menu screen of the navigation device, a switch for adjusting the air conditioner, and a switch for operating the audio. When these switches are pressed, the corresponding menu screen is displayed on the display. The screen displayed on the touch panel has a hierarchical structure, and the menu screen is at the top layer.

Then, on the menu screen for the navigation device, for example, a designation key for designating a destination setting, a place name search, etc. is displayed, and when the destination setting key is designated, a screen lower than that is displayed. Designated keys for designating a ski resort, a golf course, etc. are displayed, and the screen of the lowest layer is sequentially displayed by designating each designated key.

Further, a disk controller 21 for reading the external information storage medium 9 selected by the current position measuring unit 12 and the storage medium selector 22 and the speaker 5 are connected to the arithmetic and control unit 10. Current position measuring unit 12
Is GPS (Global Positioning System)
Data from the receiver 1, azimuth sensor 2 and distance sensor 3 is taken in and the current position of the vehicle is measured.

The GPS receiver 1 is a device that receives a signal from artificial hygiene, and obtains various information such as the signal transmission time, the position information of the receiving device, the moving speed of the receiving device, and the traveling direction of the receiving device. be able to. Although not shown, a beacon receiver, which is a device that receives a signal transmitted from a transmission device installed at a specific point, is installed, and in particular, VICS information can be obtained, traffic jam information, and current position. You can obtain information about the running of the vehicle such as information and parking lot information.

The azimuth sensor 2 has an absolute azimuth sensor and a relative azimuth sensor. The absolute azimuth sensor detects the direction in which the vehicle is located from the detection of the N direction based on a magnet, for example. Any sensor may be used as long as it is a means for detecting an absolute direction. The relative azimuth sensor is, for example, for detecting whether or not the vehicle has turned at an intersection, and may be an optical rotation sensor attached to the rotating portion of the steering wheel, a rotary resistance volume, or an angle sensor attached to the wheel portion. . Alternatively, a gyro sensor that detects a change in angle by using angular velocity may be used. That is, any means can be used as long as it can detect an angle that has changed relative to the reference angle (absolute direction).

The distance sensor 3 may be, for example, one that detects and counts the rotation of the wheel, or one that detects acceleration and integrates twice. That is, any means that can measure the moving distance of the vehicle may be used. In addition, the vehicle is equipped with a speaker 5 for voice guidance of the vehicle navigation device. The external information storage medium 9 is composed of files such as map data, intersection data, node data, road data, photo data, registration point data, guidance point data, destination data, telephone number data, and address data necessary for route guidance, It is a database that stores all the data necessary for the navigation device.

Further, there are all kinds of external information storage media 9, for example, the national version C storing map data of the whole country.
The vehicle is equipped with a D-ROM 6, a regional version CD-ROM 7 storing more detailed map data than the national version only for some regions, and a tourist version CD-ROM storing other tourist guide information. A storage medium selection device 22 is connected to the disk control device 21, and an instruction is issued to the storage medium selection device 22 regarding the external information storage medium 9 corresponding to the current position of the vehicle or an input from the outside, and the instructed external information storage is performed. The medium 9 is selected by the storage medium selection device 22. Map information around the current position and information for guiding a route are read from the selected external information storage medium 9.

The arithmetic and control unit 10 comprises a CPU (central processing unit), a ROM (read-on memory), a RAM (random access memory), etc., and the CPU stores a program stored in the ROM using the RAM as a working area. By executing it, each of the above configurations is realized. That is, the arithmetic control unit 10 includes a map information storage unit 19, a map drawing unit 13A, a map management unit 13, a screen management unit 15, an input management unit 16, a voice output management unit 18, and a general management unit 11 that manages each of these units. Is equipped with. Then, the arithmetic control unit 10 manages each of these units,
Similar to the conventional navigation device, it performs a route search from the current location to the destination, and provides voice and image guidance to the destination according to the searched route.

The map management unit 13 manages the map information storage unit 19 and the map drawing unit 13A, and the map information corresponding to the current position from the current position measurement unit 12 and
The map is managed so that the route information to the destination can be provided. The map management unit 13 is also connected to the disk control device 21. The map information storage unit 19 is connected to the disk control device 21, and the first map information storage unit 1
9A and a second map information storage unit 19B are provided, and each storage unit stores map information corresponding to the current position of the vehicle and route information to the destination. Then, the information stored in the first map information storage unit 19A is managed by the map management unit 13.

The map information storage unit 19 stores, for example, R
Although it is composed of an AM, it may be composed of a plurality of RAMs. The map drawing unit 13A is adapted to draw various image data such as maps, roads, buildings, guide signs and the like. The display device 20 is connected to the screen management unit 15, which manages the map drawing unit 13A and outputs the drawn image data to the display device 20.

A switch input management unit 17 is connected to the input management unit 16 and manages input data. The voice output management unit 18 outputs voice route guidance while traveling on the route to the destination searched by the general management unit 11. Next, the operation of the embodiment thus configured will be described.

First, the overall management unit 11 of the arithmetic and control unit 10
When the destination is input from the switch input management unit 17, the route search from the current position to the destination is performed. The information in the external information storage medium 9 is used for this route search as in the conventional navigation device. The searched route information and the map information corresponding to the current position are stored in the first map information storage unit 19A provided in the map information storage unit 19.

Then, when the driver starts traveling, based on the information stored in the map information storage unit 19, a map of a predetermined scale centered on the current position measured by the current position measurement unit 12 is screen-managed. It is displayed on the display device 20 under the control of the section 15. Then, the color of the travel route obtained by the route search is displayed in a color different from that of the other roads, and the current vehicle position and the travel direction are displayed on the map screen by arrows to guide the travel route on the screen.

The map and the travel route displayed on the display device 20 are scrolled as the vehicle moves, and the vehicle position is displayed at the center of the screen. Further, the display of the display device 20 is adapted to be displayed in a heading-up manner, and a screen such as a map displayed on the screen is rotated in accordance with a change in the traveling direction of the vehicle so that the traveling direction of the vehicle is always upward. Is displayed.

Next, when the route information and the map information are output to the display device 20 based on the first map information storage unit 19A, the external information storage medium 6 used in the first map information storage unit 19A (the former). There is a case where information of an external information storage medium (latter) different from the information of (1) is required. For example, national version C
D-ROM6 to regional version CD-ROM7, tourist version CD-
When the external information storage medium is changed from the ROM to the regional CD-ROM or the like, the route information and the map information ahead of the current position of the vehicle are stored in the first map information storage unit 19A based on the former. After storing in the first map information storage unit 19A, the reading of the former is stopped, the latter is selected by the storage medium selection device 22, and read by the disk control device 21.

Then, the route information and the map information searched based on the current position of the vehicle measured by the current position measuring unit 12 and the destination information stored in the first map information storage unit 19A are used as the second map information. It is stored in the storage unit 19B. A map information storage unit 19 changes from the first map information storage unit 19A to the second map information storage unit 12B in response to a display switching request by external input. First map information storage unit 19A
In the same manner as when the information of No. is output to the display device 20, a map of a predetermined scale centering on the current position of the vehicle is managed by the screen management unit 15 according to the information of the second map information storage unit 19B. It is displayed on the display device 20.

The program loading flow (1) which is the basis of this vehicle navigation system will be described below with reference to FIG. (1) First, for all the discs in the CD changer, it is checked what kind of disc is in the changer (step S1). In other words, a national CD-ROM dedicated for starting the navigation device
6. Check if the regional CD-ROM 7, a music CD, a game-related CD, etc. are loaded.

(2) Next, it is checked whether or not there is a navigation dedicated disc in the changer (step S2). That is, it is checked whether the national version CD-ROM 6 or the regional version CD-ROM 7 is loaded. (3) If there is no dedicated disk, display a warning message such as "Please replace the dedicated disk" with the display device 20.
Is displayed on the display screen (step S9).

(4) If there is a dedicated disk,
It is checked whether or not there is a map including the current position coordinates of the vehicle for all the dedicated disks (step S3). (5) If there is no map including the current position coordinates, a warning message such as "Please set the corresponding regional version disk" is displayed on the display screen of the display device 20 (step S10).

(6) It is checked whether the map disk including the current position coordinates of the vehicle is the regional version CD-ROM 7 or the national version CD-ROM 6 (step S4). (7) In step S4, if there is no regional version CD-ROM 7 but national version CD-ROM 6, then national version C
Read the navigation program of D-ROM6,
Map information storage unit 1 provided in the navigation device body
9 (for example, flash memory), and starts the program (step S11). Next, "national version CD
-Provide guidance in ROM6 "or the like (step S12).

(8) In step S4, the regional CD
-If ROM 7 is present, it is checked whether or not there is a national version CD-ROM 6 as another CD-ROM (step S5). If there is no nationwide version CD-ROM 6, the navigation program of the regional version CD-ROM is read and stored in the map information storage unit 19 provided in the main body of the navigation device, and the program is activated (step S7). Then, a message display process such as "Do you want to guide with the regional version disc?" Is performed (step S8).

If there is a national version CD-ROM 6, a local version CD-ROM 7 use confirmation switch is further provided to allow the user to make a selection decision (step S6). When steps S7 to S8 are performed and the user refuses to use the regional version CD-ROM 7, the national version CD-ROM 6 is activated S11 to S1.
Do 2

(9) Map display processing is performed on the display screen of the display device 20 according to the type of CD-ROM to be activated (step S13). In this way, it is determined whether the CD-ROM in the CD changer is a navigation dedicated disc, and whether the navigation dedicated disc has map data including the current position coordinates. CD-RO
Judge whether M6 is a regional version CD-ROM7, and use a regional version CD
-If it is ROM7, the regional version CD-ROM7 is given priority.

Next, the program loading flow (2) when there are a plurality of CD-ROMs in this vehicle navigation system will be described with reference to FIG. (1) For all the discs in the CD changer,
It is checked what kind of disc is in the changer (step S21). In other words, the national CD
-ROM6, regional version CD-ROM7, tourist version CD-RO
Check if M, music CD-ROM, game CD-ROM, etc. are loaded.

(2) It is checked whether or not a disc dedicated to navigation is contained in the changer (step S22). That is, it is checked whether the national version CD-ROM 6 or the regional version CD-ROM 7 and the tourist version CD-ROM are loaded. If there is no dedicated disk, a warning message such as "Please insert the dedicated disk" is displayed on the display screen of the display device 20 (step S).
32).

(3) If a dedicated disk exists,
It is checked whether or not there is a map including the current position coordinates of the vehicle for all the dedicated disks (step S23).
If there is no map including the current position coordinates (for example, if there is no national version CD-ROM 6), a warning message such as "Please insert the map disk of the corresponding area" is displayed on the display screen of the display device 20. Yes (step S33).

(4) It is checked whether or not there are a plurality of maps which are dedicated disks and which include the current position coordinates (step S24). Therefore, when there is only one dedicated disc, the navigation program of the CD disc is read and stored in the map information storage unit 19 provided in the navigation device body, and the program is activated (step S27).

When there are two or more dedicated disks, the types of those disks are displayed on the display screen of the display device 20 (step S25) so that the user can select the required disk (step S26). ). (5) One of the disc types displayed on the display screen of the display device 20 is selected, and the selected CD-ROM is the regional version C.
In the case of the D-ROM 7, the navigation program of the regional version CD-ROM 7 is read and stored in the map information storage section 19 provided in the main body of the navigation device, and the program is activated (step S28), and the "regional version CD- R
Message display processing to the effect of "use OM7" is performed (step S29).

The selected disc is the national version CD-
In the case of the ROM6, the navigation program of the national version CD-ROM 6 is read and stored in the map information storage section 19 provided in the navigation device body, and the program is started (step S30).
6 is used ”is displayed (step S31). Also, the selected disc is a tourist version CD-R.
In the case of OM, national version CD-ROM 6 and regional version CD
-Like the ROM7, the navigation program of the tourist version CD-ROM is read and stored in the map information storage section 19 provided in the navigation device body, the program is started, and the message "Tourism version disc guide" is displayed. Display processing is performed.

(6) Map display processing is performed on the display screen of the display device 20 according to the type of CD-ROM to be activated (step S34). In this way, it is determined whether or not the disc in the CD changer is a Navi-only disc, and it is determined whether the Navi-only disc has map data including the current position coordinates. If there are two or more discs, the disc name is displayed on the display device 20.
, And let the user select which disk to use.

Next, a flow (1) of holding route search information when the national version CD-ROM and the regional version CD-ROM are automatically switched while the vehicle is traveling will be described with reference to FIG. (1) It is determined whether or not the national version CD-ROM 6 is being activated (step S101). (2) If YES in step S101, it is determined whether or not the current position of the vehicle has approached within the predetermined distance range of the regional version CD-ROM 7 (step S102).

(3) If YES in step S102, the regional version CD-ROM 7 is started (step S103). (4) Next, based on the destination information, route setting conditions and waypoint information set in the national version CD-ROM 6, the regional version CD-RO
A route search is performed using the data of M7 (step S1).
04).

(5) Next, the route search result and the map data around the current position are stored in the second map information storage section 19B (step S105). (6) Next, it is checked whether or not there is a CD switching request (step S106). (7) If YES in step S106,
From the first map information storage unit 19A to the second map information storage unit 19
Switching output to B is performed (step S107).

(8) In step S106, in the case of NO, switching output is not performed from the first map information storage section 19A to the second map information storage section 19B, and the process returns. Next, the national version CD-ROM and regional version CD- while the vehicle is running
A flow (2) of holding route search information at the time of automatic switching to the ROM will be described with reference to FIG. (1) First, it is determined whether or not the national version CD-ROM 6 is being activated (step S201).

(2) If YES in step S201, it is determined whether or not the current position of the vehicle is within the predetermined distance range of the regional CD-ROM 7 (step S20).
2). (3) If YES in step S202, the destination information and route information of the national version CD-ROM 6 are requested (step S203). Then, the destination information and the route information are stored in the first map information storage unit 19A.

(4) Next, it is checked whether or not the national version CD-ROM 6 is being read (step S20).
4). (5) If YES in step S204, the reading of the regional version CD-ROM 7 is started (step S
205). (6) Next, a route search is performed (step S206).

(7) Next, the map data around the current position and the search result are stored in the second map information storage section 19B (step S207). (8) Next, it is checked whether or not there is an external CD-ROM switching request (step S208). (9) If YES in step S208,
From the first map information storage unit 19A to the second map information storage unit 19
The output of switching to B is performed (step S209).

(10) In step S208, NO
In this case, the output is not switched from the first map information storage unit 19A to the second map information storage unit 19B, and the process returns. Further, it may be necessary to display a considerably detailed map such as a residential map while displaying based on the national version CD-ROM and the regional version CD-ROM. Hereinafter, FIG. 6 is a switching flow of a housing map disk having detailed map information when a detailed map is required.

(1) First, the current position coordinates of the vehicle are acquired (step S301). (2) Next, a house map disk, that is, a peripheral information CD
-Start up the ROM (step S302). (3) Next, the map data around the current position of the residential map disk is read from the acquired current position coordinates (step S303).

(4) Next, the map data is stored in the second map information storage section 19B (step S304). Such processing is automatically performed in the area where the residential map disk is located. Further, regarding the display flow of the residential map, FIG.
This will be described with reference to FIG. (1) In the process shown in FIG. 6, when the map data is stored in the second map information storage unit 19B (step S30
4) It is checked whether or not the reading of the house map data is completed (step S401).

(2) In order to notify the outside that the house map data can be displayed on the screen, the above step S401
In the case of YES, the changeover switch to the residential map is displayed (step S402). For example, in that case, as shown in FIG. 8, the detail key 31, the house map key 32, the entire route key 33, or the enlargement key 34 is displayed on the display screen of the display device 20. Here, any one of the detail key 31, the house map key 32, the all-routes key 33, and the enlargement key 34 can be selected. When the house map key 32 is selected, the second map information storage unit 19B
The map information and the route information based on the house map disk stored in is output and displayed.

If the detail key 31 is continuously pressed, the screen shown in FIG.
Switch to the screen where the scale bar is displayed, as shown in
If the detail key 31 is further pressed, the map information and the route information based on the house map disk may be displayed. Further, the display screen of FIG. 9 may be output in the process of displaying the changeover switch to the residential map (step S402).

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention, and these modifications are not excluded from the scope of the present invention.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a vehicle navigation device showing an embodiment of the present invention.

FIG. 2 is a program loading flowchart (1) of the vehicle navigation device according to the embodiment of the present invention.

FIG. 3 is a nationwide version CD during running of a vehicle showing an embodiment of the present invention
FIG. 7 is a flowchart (1) of holding route search information at the time of automatic switching between the ROM and the regional CD-ROM.

FIG. 4 is a program loading flowchart (2) of the vehicle navigation device according to the embodiment of the present invention.

FIG. 5 is a nationwide version of a CD during running of a vehicle showing an embodiment of the present invention
6 is a flowchart (2) of holding route search information at the time of automatic switching between the -ROM and the regional CD-ROM.

FIG. 6 is a flowchart for switching to a residential map showing an embodiment of the present invention.

FIG. 7 is a display flowchart of a residential map showing an embodiment of the present invention.

FIG. 8 is a diagram showing a switching display screen (part 1) for switching to a residential map showing an embodiment of the present invention.

FIG. 9 is a diagram showing a switching display screen (part 2) for switching to a residential map showing an embodiment of the present invention.

[Explanation of symbols]

1 GPS (Global Positioning System) receiver 2 Direction sensor 3 Distance sensor 5 Speaker 6 National version CD-ROM 7 Regional version CD-ROM 10 Information processing control device 11 Central processing unit (CPU) 12 Current position measurement unit 13 Map management Part 13A Map information storage unit 14 Map data reading unit 15 Screen management unit 16 Input management unit 17 Switches input management unit 18 Voice output management unit 19 Route information storage unit 19A First map information storage unit 19B Second map information storage unit 20 Display device 21 Disk control device 31 Detailed key 32 House map key 33 Whole route key 34 Enlarge key

Claims (4)

[Claims] 1. A plurality of external information storage media having different levels of detail of map information are provided, and detailed map information is provided from the external information storage medium being used in correspondence with information on the current position of the vehicle. A vehicle navigation device characterized by switching to an external information storage medium. 2. A current position detection means for detecting a current position of a vehicle, a plurality of external information storage media for storing map information, a management means for managing the external information storage medium, and a management means for managing the external information storage media. Control means for comparing at least one external information storage medium corresponding to the current position of the vehicle by comparing the information of a plurality of external information storage media with the information of the current position of the vehicle, and one of the selected ones. And a means for changing to an external information storage medium. 3. A current position detection means for detecting the current position of a vehicle, a plurality of external information storage media for storing map information, a management means for managing the external information storage media, and a management means for managing the external information storage media. Control means for selecting one external information storage medium corresponding to the current position of the vehicle by comparing information of a plurality of external information storage media and information of the current position of the vehicle; and map information of the first external information storage medium. Based on the first map information storage means for storing route information corresponding to the current position of the vehicle, and the current position of the vehicle from the external information storage medium excluding the first external information storage medium selected by the control means. Means for changing to one second external information storage medium corresponding to, and second route information corresponding to the current position of the vehicle based on the changed map information of the second external information storage medium
Map information storage means, switching means for switching map information in response to the switching request for map information; and
A vehicle navigation device comprising: an output unit that switches from the map information storage unit to the second map information storage unit and outputs the route information of the second map information storage unit. 4. The vehicle navigation device according to claim 2, wherein when the control unit selects a plurality of external information storage media, one external information storage medium is selected from the plurality of external information storage media by the outside. A navigation device for a vehicle, characterized in that the selection means to be changed and the external information storage medium selected by the selection means are changed.