JP2009253807A - In-vehicle hands-free apparatus, and vehicular navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-vehicle hands-free apparatus that prevents a driver from being unable to concentrate in driving even when a telephone receives an incoming call while a vehicle is passing by an accident-prone location. <P>SOLUTION: An incoming call failure area determining portion 18 determines the incoming call failure area with respect to the accident-prone location on a road around the driver position and a guide route or a road in a forward direction. A hands-free control portion 17 carries out the incoming call failure control for holding a hands-free incoming call during the period while the vehicle is on the incoming call failure area. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an in-vehicle hands-free device that enables a hands-free call by executing a hands-free incoming call when an incoming call to a telephone is detected, and a vehicle navigation apparatus including the in-vehicle hands-free device.

  Various hands-free devices have been proposed that are connected to a mobile phone in a vehicle interior by wire or wirelessly and that enable hands-free calling using a microphone and a speaker provided in the vehicle interior. By using this hands-free device, the driver can receive a call and make a call in a hands-free manner (without touching the mobile phone) even if the mobile phone receives an incoming call while driving.

  However, there may be a case where it becomes a problem for the driver to make the above-mentioned hands-free call while driving. For example, when passing a point where traffic accidents frequently occur such as a curve or a junction (a point where accidents frequently occur), the driver needs to concentrate more on driving than usual. In such a case, if a hands-free call is performed, the driver cannot concentrate on driving accordingly.

Therefore, when each state of the vehicle (vehicle running speed, brake state, turning state of the vehicle, etc.) is input, based on these, it is detected how much driving is burdened on the driver, and the burden is large Has been invented to stop the ringing tone (see, for example, Patent Document 1). According to this, the driver can concentrate on driving even when there is an incoming call to the mobile phone when passing through the accident occurrence point as described above.
Japanese Patent Laid-Open No. 10-294965

  As described above, in the configuration of the conventional technique, after determining whether or not the burden on driving is large, the ringing tone is stopped. For this reason, when the vehicle is passing through the accident-prone point and an incoming call is received before the above determination is made, a hands-free incoming call may be executed. In this case, it is assumed that the driver cannot concentrate on driving.

  The present invention has been made in view of the above circumstances, and its purpose is to prevent a situation in which the driver cannot concentrate on driving even when an incoming call to the telephone is received while the vehicle passes through the accident-prone area. An object of the present invention is to provide a hands-free device and a vehicle navigation device provided with the in-vehicle hands-free device.

  According to the means described in claim 1, the unacceptable section setting means is configured to generate accidents on the road in the traveling direction of the vehicle based on the own vehicle position data indicating the current position of the vehicle, road map data, and accident frequent occurrence point data. When it is determined that a point exists, at least a section up to the point where the accident frequently occurs is set as an unacceptable section. Then, the hands-free control means executes non-incoming call control for making the hands-free incoming call impossible during a period in which the vehicle is located in the non-incoming call zone based on the own vehicle position data. This prevents a situation in which the driver cannot concentrate on driving even when a call arrives during this period.

  According to the means described in claim 2, the unreceivable section setting means determines the traveling direction of the vehicle based on the route data for guiding the traveling route of the vehicle. As a result, when the vehicle is traveling along the guided route, it is possible to accurately determine the direction in which the vehicle travels and to reliably set the unacceptable section for the accident-prone point on the road in the traveling direction.

  According to the means described in claim 3, the unacceptable section setting means determines the traveling direction of the vehicle based on the change in the vehicle position data and the road map data. As a result, even when the route is not being routed, it is possible to determine the direction in which the vehicle travels, and to reliably set the unacceptable section for the accident-prone point on the road in the traveling direction.

  According to the means of claim 4, when there is a branch point in the traveling direction of the vehicle, the unreceivable section setting unit travels on the road having the highest road rank among the plurality of roads after the branch point. Judge that. The rating of the road is determined according to the size of the road. For example, the national road is set higher than the prefectural road. That is, by determining the traveling direction in this way, even when there is a branch point, it is possible to reliably set an unacceptable section for an accident-prone point on the road where the vehicle is likely to travel.

  According to the means of claim 5, when there is a branch point in the traveling direction of the vehicle, the unreceivable section setting unit travels on the road having the widest road among the plurality of roads after the branch point. to decide. By determining the direction of travel in this way, it is possible to reliably set the unacceptable section for accident-prone points on the road where the possibility that the vehicle will travel is high even when there is a branch point.

  According to the means described in claim 6, the hands-free control means can execute the incoming call disabling control when the traveling speed of the vehicle exceeds a predetermined threshold speed. Even during a period in which the vehicle is located in the unacceptable zone, the degree to which the vehicle should be concentrated changes according to the traveling speed. For example, when the vehicle is stopped in a zone where calls cannot be received, that is, when the traveling speed is zero, the driver does not need to concentrate on driving (because driving is not performed), and in this case, hands-free incoming calls can be made. This improves convenience.

  According to the means of the seventh aspect, the unacceptable section setting means sets the unreceivable section so that the predetermined section to the accident frequent occurrence point becomes longer as the traveling speed of the vehicle is higher. The time required to reach the accident-prone point from the current position varies depending on the traveling speed of the vehicle. As described above, if the unacceptable section is set, when the vehicle travels at a high speed, it becomes impossible to receive a hands-free call from a point closer to the point where accidents frequently occur. Therefore, regardless of the traveling speed, it is possible to reliably prevent a situation where a hands-free call is performed when passing through a point where accidents frequently occur.

  According to the means of claim 8, when it is determined that the accident frequent occurrence point exists on the curve, the unacceptable section setting means sets a range including this curve as the unreceivable section. When the vehicle travels on a curve, the driver needs to concentrate on driving at least in the section from the entrance to the exit. As described above, if the unacceptable section is set, it is possible to prevent a situation in which it is not possible to concentrate on driving even when passing through an accident-prone point on a curve.

  According to the means of claim 9, when the accident frequent occurrence point is a joining point, the incoming call impossible section setting means sets a section before and after this joining point as an incoming call impossible section. When the vehicle travels at a junction, the driver needs to concentrate on driving in the front and rear sections. As described above, if the unacceptable section is set, it is possible to prevent a situation in which it is not possible to concentrate on driving even when passing through an accident-prone area that is a merging point.

  According to the tenth aspect of the present invention, the hands-free control means notifies the other party of the incoming call that the telephone cannot be communicated via the telephone when the incoming call impossible control is executed. In this way, when there is an incoming call during a period in which the vehicle is located in the unacceptable section, it is possible to prevent the incoming call partner from feeling uncomfortable.

  According to the means described in claim 11, the hands-free control means executes the incoming call disabling control by placing the incoming call to the telephone on hold. As a result, even if there is an incoming call when the vehicle is located in a zone where calls cannot be received, if the vehicle leaves the zone where calls cannot be received in the on-hold state, a hands-free call is immediately executed after that. Can be made possible.

  According to the means described in claim 12, the present invention can be applied to a vehicle navigation device.

Hereinafter, an embodiment in which the present invention is applied to a vehicle navigation apparatus having a hands-free function will be described with reference to the drawings.
FIG. 1 schematically shows a configuration of a navigation device 1 (corresponding to an in-vehicle hands-free device and a vehicle navigation device) mounted on a vehicle as a functional block diagram. The navigation device 1 has a position detection unit 3, a map data storage unit 4, a switch information input unit 5, a display unit 6, a voice processing unit 7, and a Bluetooth communication unit 8 for a control unit 2 that controls the overall operation of the device. Are connected.

  The position detection unit 3 (corresponding to position data acquisition means) includes a GPS (Global Positioning System) sensor 3a, a gyro sensor 3b, and a vehicle speed sensor 3c (corresponding to vehicle speed data acquisition means) that detects the traveling speed of the vehicle. Yes. The position detection unit 3 detects the position of the vehicle with high accuracy while interpolating the detection signals of the respective position detection elements. Depending on the required detection accuracy, only a part of these may be used, or an acceleration sensor for detecting the acceleration of the vehicle may be added.

  The map data storage unit 4 (corresponding to map data acquisition means and point data acquisition means) is a data storage medium in which various data such as road map data, landmark data, map matching data, destination data, accident frequent occurrence point data are recorded. It is comprised by the drive device for reading data from. Of these, the road map data includes road shape, road width, road type (general road, prefectural road, national road, expressway, etc.) and the like. The accident frequent occurrence point data is data indicating a point where a traffic accident is likely to occur, such as a sharp curve or a junction. As the data storage medium, a CD-ROM, DVD-ROM, hard disk, memory card, or the like is used.

  The switch information input unit 5 includes a mechanical switch disposed around the display unit 6, a touch panel formed on the display screen of the display unit 6, etc., and commands and character information related to operations such as various data and setting items. It is provided to give a map designation signal to the control unit 2. In addition, you may provide the remote control light-receiving part which receives operation from a remote control as needed.

  The display unit 6 includes a color liquid crystal display for displaying a map, characters, and the like, and is installed in the vicinity of the driver's seat of the vehicle. On the display screen of the display unit 6, a marker indicating the current position and traveling direction of the vehicle detected by the position detection unit 3, road map data input from the map data storage unit 4, a guide route displayed on the map, and settings Additional data such as a place mark is superimposed and displayed. On the display screen of the display unit 6, various input screens for searching and inputting a destination and the like by the user, various messages, information, and the like are also displayed. The voice processing unit 7 performs voice processing on the transmitted voice input to the microphone 9 and the received voice output from the speaker 10.

  The Bluetooth communication unit 8 has a short-range wireless communication function compliant with the Bluetooth (registered trademark) communication standard, and is connected to an external device (for example, a mobile phone A) having a wireless communication function compliant with the same standard. Wireless communication connection is possible. A cellular phone A (corresponding to a telephone) owned by a driver has a cellular radio communication function for performing cellular radio communication with a cellular phone network and a Bluetooth communication function for performing Bluetooth communication. When the mobile phone A is brought into the vehicle and positioned within a communicable range with the Bluetooth communication unit 8, the mobile phone A establishes a Bluetooth communication link and performs Bluetooth communication with the navigation device 1.

  The control unit 2 is mainly composed of a microcomputer including a CPU, a ROM, a RAM, and the like. Among them, the ROM stores programs for the navigation function and the hands-free function, and the RAM temporarily stores processing data at the time of program execution, road map data acquired from the map data storage unit 4, and the like. It is like that. The control unit 2 executes a route guidance function that automatically selects an optimum route from the current position to the destination and forms and displays a guidance route in accordance with an operation on the switch information input unit 5, Matching processing, guidance voice calculation, map drawing, and the like are performed. The Dijkstra method is known as a method for automatically setting an optimum route in this way.

  The control unit 2 includes a map matching unit 11, a map data acquisition unit 12, a route calculation unit 13, a route guidance unit 14, a drawing unit 15, a screen control management unit 16, a hands-free control unit 17, and an unreceivable section setting unit 18. It is configured to realize the function. The map matching unit 11 uses the vehicle position information detected by the position detection unit 3 and the road shape data of the road map data stored in the map data storage unit 4 to determine on which road the vehicle position exists. Is identified. At this time, the map data acquisition unit 12 acquires necessary road map data from the map data storage unit 4.

  When the user performs an operation for displaying a desired map via the switch information input unit 5 and sets the destination, the route calculation unit 13 (corresponding to route data acquisition means) is calculated by the map matching unit 11. The optimum route from the current current position or the starting point designated by the user to the destination is calculated. The route guidance unit 14 calculates points necessary for guidance from the above route calculation results and road map data (road shape, intersection position information, crossing position information, etc.), and what kind of guidance (turns to the right) Or whether it should turn to the left, etc.).

  The drawing unit 15 draws a map of the current position, a schematic diagram of the expressway, an enlarged view of the vicinity of the intersection in the vicinity of the intersection, and the like in a drawing memory (not shown) in accordance with an instruction from the screen control management unit 16 and displays it on the display unit 6. The map data acquisition unit 12 acquires the road map data necessary for each of the above processes from the map data storage unit 4 and provides it to each processing unit. Each process described above is executed using a ROM or RAM of a microcomputer.

  The hands-free control unit 17 (corresponding to the hands-free control means) activates the hands-free function in a state where a Bluetooth communication link is established between the Bluetooth communication unit 8 and the mobile phone A owned by the driver. It has become. In a state where the hands-free function is enabled, the hands-free control unit 17 is configured to receive a ring tone indicating that the mobile phone A is receiving a call, a dial tone indicating that the mobile phone A is calling, The speaker 10 outputs a ringing tone indicating that a call is being made and a voice received from the other party. In a state where the hands-free function is enabled, the hands-free control unit 17 executes a hands-free incoming call automatically when the mobile phone A receives an incoming call or by a predetermined operation of the switch information input unit 5.

  The unreceivable section setting section 18 (corresponding to the unreceivable section setting means) reads out accident frequent occurrence point data stored in the map data storage section 4 into the RAM of the microcomputer. Although the details will be described later, the unreceivable section setting unit 18, the current position of the vehicle (own vehicle position data) detected by the position detection unit 3, road map data read from the map data storage unit 4, and frequent accidents An incoming call impossible section is set based on the point data. The setting of the unacceptable section is performed when the navigation device 1 is started, when route guidance is started, or whenever the vehicle travels a predetermined distance. In addition, it is good also as a structure which the incoming call impossible area setting part 18 downloads accident frequent occurrence point data regularly from the center which is not shown in figure via the Bluetooth communication part 8 and the mobile telephone A. FIG. In this way, it is possible to always obtain the latest information on accident occurrence points.

  When the hands-free control unit 17 determines that the vehicle is located in the unacceptable section, it sets itself to the incoming call hold state. When there is an incoming call to the mobile phone A during the period set in the incoming call hold state, the hands-free control unit 17 automatically holds the incoming call (hold state). This disables hands-free incoming calls during a period in which the vehicle is located in the incoming call unavailable section (incoming call unavailable control). However, the hands-free control unit 17 can execute the incoming call disabling control only when the traveling speed of the vehicle exceeds a predetermined threshold speed (for example, zero). That is, the hands-free control unit 17 does not set the incoming call hold state when the vehicle is stopped.

  The incoming call disabling control may be any control that does not execute a hands-free incoming call during a period in which the vehicle is located in the incoming call disabling section. For example, control for automatically rejecting an incoming call, Control for shutting off the power supply of the mobile phone A may be used. Further, it may be configured such that execution of the incoming call disabling control is prohibited by performing a predetermined operation via the switch information input unit 5. The threshold speed is not limited to zero, and may be about several km / h, for example. In other words, not only when the vehicle is stopped, but also when the vehicle is in the slowing state, the incoming call hold state may not be set.

Next, the operation of the above configuration will be described with reference to FIGS.
FIG. 2 is a flowchart showing the overall flow of the unreceivable section setting process by the control unit 2. The control unit 2 performs a setting process for an unacceptable section when the navigation device 1 is started, when route guidance starts, or whenever the vehicle travels a predetermined distance. Hereinafter, the flow of the unreceivable section setting process will be described based on the flowchart of FIG.

(1) When the navigation device 1 is activated When the navigation device 1 is activated (step S1: YES), the unacceptable section setting unit 18 reads out accident frequent occurrence point data around the vehicle position into the RAM (step S2). In the present embodiment, the periphery of the vehicle position is, for example, a range inside a circle with a radius of several kilometers centered on the vehicle position. The range around the vehicle position may be changed by operating the switch information input unit 5. The unacceptable section setting unit 18 sets unacceptable sections in order from the closest to the own vehicle position among the accident frequent spots based on the read accident frequent spot data (step S3). When the setting of the unacceptable section is completed, the process is terminated. Note that the “incoming call unavailable section setting” in step S3 will be described later.

(2) At the start of route guidance When the user operates the switch information input unit 5 to set a destination, the route calculation unit 13 determines the optimum position from the current vehicle position (or set departure point) to the destination. A simple route. Thereafter, when the route guidance unit 14 calculates information necessary for guidance (step S1: NO, step S5: YES), the unreceivable section setting unit 18 stores the accident frequent occurrence point data existing on the calculated route in the RAM. (Step S6). The unacceptable section setting unit 18 sets an unacceptable section in the same manner as at the time of activation described above (step S3), and ends the process.

(3) When traveling a predetermined distance After the navigation device 1 is activated (step S1: NO), when the route guidance function is not used (step S5: NO), if the vehicle travels, frequent accidents read at the time of activation There is a possibility of passing through accident-prone points other than the point. In that case, since the incoming call impossible section is not set, the incoming call disable control for holding the hands-free incoming call is not executed. Therefore, the incoming call impossible section setting unit 18 sets the incoming call impossible section as follows each time the vehicle travels a predetermined distance, for example, every time the vehicle travels several hundred meters.

  That is, when the vehicle travels several hundred meters (step S7: YES), the unacceptable section setting unit 18 determines the traveling direction of the vehicle based on the change in the own vehicle position data and the road map data during that time (step S8). ). At this time, when there is a branch point in the determined traveling direction of the vehicle, the unacceptable section setting unit 18 confirms the type of road ahead of the branch point based on the road map data, and among these roads Judge that the road is going on the road with the highest grade. The road rating mentioned here is, for example, higher for prefectural roads than general roads and higher for national roads than prefectural roads. In this embodiment, it is assumed that roads are stored in advance in road map data. Note that the determination of the direction of travel ahead of the branch point is not limited to this. For example, the road width may be confirmed based on road map data and may be determined to travel on the widest road. .

  The unreceivable section setting unit 18 reads out accident frequent occurrence point data existing on the road in the traveling direction determined in step S8 into the RAM (step S9). Then, the unreceivable section setting unit 18 sets the unreceivable section in the same manner as at the time of activation and the start of route guidance described above (step S3), and ends the process.

  Next, “setting the unreceivable section” in step S3 will be described with reference to FIGS. FIG. 3 is a flowchart showing the control contents of the control unit 2 when setting the unacceptable section. FIG. 4 is a diagram schematically showing roads near the accident-prone points, where (a) shows the roads around the curve and (b) shows the roads around the junction. In addition, the arrow in FIG. 4 represents the traveling direction of the vehicle. The method of setting the unacceptable section differs depending on the road where the accident-prone point as the setting target is present as follows.

(1) When the accident frequent occurrence point is on the curve As shown in FIG. 4A, when the accident frequent occurrence point 21 is in the middle of the curve (step T1: YES), the driver at least from the entrance 22 of the curve It is necessary to pay particular attention to driving until the exit 23. Therefore, the incoming call impossible section setting unit 18 sets the section from the entrance 22 to the exit 23 of the curve as an incoming call impossible section (step T2). Here, based on the road map data, the unacceptable section setting unit 18 determines, for example, a point where the road begins to bend as an entrance 22 and a point where the bend ends as an exit 23.

  Note that the method of determining the entrance 22 and the exit 23 is not limited to this. For example, identifiers indicating the entrance 22 and the exit 23 of the curve may be registered in advance in the road map data. Alternatively, a section including a road before the entrance 22 of the curve and a road ahead of the exit 23 of the curve may be set as an unacceptable section. In addition, data indicating the position of the unacceptable section may be stored in advance in the road map data.

(2) When the accident frequent occurrence point is a merge point As shown in FIG. 4B, when the accident frequent occurrence point is the merge point 24 (step T1: NO, step T3: YES), the driver at least joins the merge point. It is necessary to pay particular attention to driving in the section before and after the point. Therefore, the incoming call impossible section setting unit 18 sets the section from the point 25 a predetermined distance (for example, 500 m) before the junction point 24 to the point 26 ahead of the predetermined distance (for example, 100 m) based on the traveling direction of the vehicle. Set (step T4). Here, the unacceptable section setting unit 18 determines a junction point from, for example, an intersection state of roads based on road map data.

  Note that the method for determining the junction point is not limited to this, and for example, an identifier indicating the junction point may be registered in the road map data in advance. In addition, the unreceivable section setting unit 18 targets all roads connected to the junction 24 and joins each road when the traveling direction of the vehicle cannot be determined, such as in the case of setting processing when the navigation device 1 is activated. A section from a point 24 to a point separated by a predetermined distance (for example, 500 m) is set as an unreceivable section.

  In addition, when setting an unacceptable section while the vehicle is traveling, such as when setting an unacceptable section when traveling a predetermined distance, the unacceptable section setting unit 18 receives an incoming call based on the traveling speed (vehicle speed data) of the vehicle. You may make it change the range of an impossible area. For example, when the vehicle speed is 30 km / h, a section from a point 300 m ahead of the junction 24 to a point 60 m ahead is set as a non-incoming zone, and when the vehicle speed is 60 km / h, from a point 600 m before the junction A section up to a point 120 m ahead may be set as an unacceptable section. In this way, it is possible to set an unacceptable section having an appropriate length according to the traveling speed of the vehicle. In addition, when the data about the unreceivable section is stored in the road map data in advance, the distance of the unreceivable section is changed according to the difference between the estimated traveling speed of the stored data and the actual traveling speed. It may be.

(3) When the accident frequent occurrence point exists other than the curve and the junction point Although not shown, when the accident frequent occurrence point exists other than the curve and the junction point (steps T1, T3: NO), the driver must at least have the accident frequent occurrence point. It is necessary to pay particular attention to driving during the predetermined section. Accordingly, the unacceptable section setting unit 18 sets a section (predetermined section) from a predetermined distance (for example, 500 m) before the accident frequent occurrence point to the accident frequent occurrence point based on the traveling direction of the vehicle as an unacceptable section (step). T5). Moreover, when the traveling direction of the vehicle cannot be determined, the unreceivable section setting unit 18 sets a section including all roads inside a circle having a radius of, for example, 500 m with the accident frequent occurrence point as the unreceivable section.

  In this case as well, the range of the unreceivable section may be changed according to the vehicle speed as in the case of the junction point described above. For example, the higher the vehicle speed, the longer the unacceptable section may be changed. In other words, the unacceptable section may be set so that the predetermined section to the accident frequent occurrence point becomes longer as the vehicle speed increases. In addition, the higher the vehicle speed, the larger the radius of the circle centering on the accident frequent occurrence point may be set to set the unacceptable section. In this way, it is possible to set an unacceptable section having an appropriate length according to the traveling speed of the vehicle.

  Next, incoming call disabling control by the control unit 2 will be described with reference to FIG. FIG. 5 is a flowchart showing the control contents of the control unit 2 when the incoming call impossible control is performed. When a vehicle passes through an accident-prone area, the driver needs to concentrate on driving. Accordingly, at this time, it is not preferable for the driver to make a hands-free call. Therefore, as described above, the navigation device 1 according to the present embodiment sets an unacceptable section for an accident-prone area, and executes a hands-free incoming call as follows during a period in which the vehicle is located in the unacceptable section. This prevents the driver from concentrating on driving.

  That is, the hands-free control unit 17 monitors whether or not the vehicle is located in the unreceivable zone based on the own vehicle position data (step U1). During a period when the vehicle is not located in the unreceivable section (step U1: NO), when the mobile phone A receives an incoming call, the hands-free control unit 17 can execute a hands-free incoming call and make a hands-free call. State. As a result, the driver can make a hands-free call. On the other hand, if it is determined that the vehicle is located in the unacceptable section (step U1: YES), the hands-free control unit 17 confirms the traveling speed of the vehicle (step U2). If it is determined that the vehicle is traveling (the vehicle speed exceeds zero) (step U2: YES), it sets itself in the incoming call hold state (step U3).

  After setting in this way, when there is an incoming call to the mobile phone A during a period in which the vehicle is located in the incoming call impossible section, the hands-free control unit 17 automatically holds the incoming call. At this time, the hands-free control unit 17 may transmit a message to the other party of the incoming call via the mobile phone A to the effect that the call cannot be made. In this way, it is possible to prevent the receiving party from feeling uncomfortable.

  If it is determined that the vehicle is stopped (step U2: NO), the hands-free control unit 17 does not set the incoming call hold state until the vehicle starts running (until the vehicle speed exceeds zero). . After setting itself to the incoming call hold state, the hands-free control unit 17 monitors whether or not the vehicle has left the unacceptable zone (step U4). If it is determined that the vehicle has left the unacceptable section (NO), the hold setting state is canceled (step U5), and the process returns to step U1.

  As described above, the navigation device 1 according to the present embodiment includes the unusable section setting unit 18 that sets unreceivable sections for accident-prone points, and the hands that perform unreceivable control during a period in which the vehicle is located in the unreceivable section. And a free control unit 17. According to such a configuration, even when the vehicle passes through the accident-prone point or at a point before the accident-prone point, even if the driver's mobile phone A receives an incoming call, the hands-free control unit 17 receives the call. Since it is put on hold, it is possible to prevent a hands-free call from being made when passing through a point where accidents frequently occur. Therefore, it is possible to prevent a situation where the driver cannot concentrate on driving when the vehicle passes through the accident-prone point.

  When the route guidance is started, the unreceivable section setting unit 18 sets the unreceivable section for the accident-prone points existing on the guidance route. As a result, when the vehicle is traveling along the guided route, the incoming call impossibility control can be executed. In addition, the unacceptable section setting unit 18 sets an unacceptable section for accident-prone points around the vehicle position when the navigation device 1 is activated, and an accident that exists on the road in the traveling direction every time the vehicle travels a predetermined distance. Set a zone where incoming calls are not possible for frequently occurring locations. As a result, the incoming call disabling control can be executed even when the route is not being guided or when the vehicle is not traveling along the guided route.

  When there is a branch point in the traveling direction of the vehicle, the unreceivable section setting unit 18 selects the road with the highest road rank (or the road with the widest road width) among a plurality of roads after the branch point. Since it is determined that the vehicle will travel, it is possible to reliably set the unacceptable section for the accident-prone point on the road where the vehicle is likely to travel.

  When it is determined that the accident frequent occurrence point exists on the curve, the unreceivable section setting unit 18 sets the section from the entrance 22 to the exit 33 of this curve as the unreceivable section. As a result, it is possible to prevent a situation in which the driver cannot concentrate on driving even when the vehicle passes through an accident occurrence point on a curve. In addition, when the incoming call impossible section setting unit 18 determines that the accident frequent occurrence point is a joining point, it sets a section before and after the joining point as an incoming call impossible section. As a result, it is possible to prevent a situation in which the driver cannot concentrate on driving even when the vehicle passes through an accident-prone point that is a merging point.

  The hands-free control unit 17 makes it possible to execute the incoming call disabling control when the traveling speed of the vehicle exceeds zero. This makes it possible to make a hands-free incoming call when the driver does not need to concentrate on driving such as when the vehicle is stopped in a zone where incoming calls are not possible, and convenience is improved. In addition, the hands-free control unit 17 performs incoming call disabling control by placing an incoming call to the mobile phone A on hold. As a result, even if there is an incoming call when the vehicle is located in a zone where calls cannot be received, if the vehicle leaves the zone where calls cannot be received in the on-hold state, a hands-free call is immediately executed after that. Can be made possible.

The present invention is not limited to the embodiment described above and illustrated in the drawings, and the following modifications or expansions are possible.
When the hands-free control unit 17 determines that the vehicle is located in the unacceptable section, the hands-free control unit 17 may set itself to the incoming call hold state regardless of the traveling speed of the vehicle. That is, step U2 in FIG. 5 may be provided as necessary.
The navigation device 1 and the mobile phone A may be configured to have a wireless communication function based on a wireless communication standard other than the Bluetooth communication standard. Moreover, the structure which performs communication between the navigation apparatus 1 and the mobile telephone A by a wire, and the structure in which the navigation apparatus 1 has a function as a telephone may be sufficient.
In the above-described embodiment, an example in which the present invention is applied to a vehicle navigation device having a function as a hands-free device has been described. However, the present invention is not limited to this, and the present invention can also be applied to an independent in-vehicle hands-free device. It is.

The functional block diagram of the navigation apparatus for vehicles which shows one Embodiment of this invention Flow chart showing the overall flow of the unreceivable section setting process Flowchart showing control contents when executing unacceptable section setting A diagram schematically showing the road near the accident site Flowchart showing control contents when executing unreceivable control

Explanation of symbols

  In the drawings, 1 is a navigation device (on-vehicle hands-free device, vehicle navigation device), 3 is a position detection unit (position data acquisition means), 3c is a vehicle speed sensor (vehicle speed data acquisition means), and 4 is a map data storage unit (map). (Data acquisition means, point data acquisition means), 13 is a route calculation unit (route data acquisition means), 17 is a hands-free control unit (hands-free control means), 18 is an unreceivable section setting section (unreceivable section setting means), A indicates a mobile phone (telephone).

Claims (12)

An in-vehicle hands-free device provided with hands-free control means for enabling hands-free calling by detecting a call to the telephone and performing a hands-free call.
Position data acquisition means for acquiring own vehicle position data indicating the current position of the vehicle;
Map data acquisition means for acquiring road map data;
Point data acquisition means for acquiring accident-prone point data;
When it is determined that the accident frequent occurrence point exists on the road in the traveling direction of the vehicle based on the vehicle position data, the road map data, and the accident frequent occurrence point data, at least a predetermined section to the accident frequent occurrence point A non-receivable section setting means for setting as a non-receivable section,
The hands-free control means executes an incoming call disable control for disabling the hands-free incoming call during a period in which the vehicle is located in the incoming call disabled section based on the vehicle position data. In-vehicle hands-free device. Comprising route data acquisition means for acquiring route data for guiding the travel route of the vehicle;
The in-vehicle hands-free device according to claim 1, wherein the unreceivable section setting unit determines a traveling direction of the vehicle based on the route data.   2. The in-vehicle hands-free device according to claim 1, wherein the unreceivable section setting means determines a traveling direction of the vehicle based on a change in the own vehicle position data and the road map data.   The unreceivable section setting means, when there is a branch point in the traveling direction of the vehicle, determines that the road rank is the highest road among a plurality of roads after the branch point. The in-vehicle hands-free device according to claim 3.   The unreceivable section setting means, when there is a branch point in the traveling direction of the vehicle, determines that the road is the widest road among a plurality of roads after the branch point. The in-vehicle hands-free device according to Item 3. Vehicle speed data acquisition means for acquiring vehicle speed data indicating the traveling speed of the vehicle,
The said hands-free control means can perform the said incoming call prohibition control when the traveling speed of the said vehicle exceeds a predetermined threshold speed based on the said vehicle speed data. The in-vehicle hands-free device according to any one of the above. Vehicle speed data acquisition means for acquiring vehicle speed data indicating the traveling speed of the vehicle,
7. The non-callable section setting means sets the non-callable section so that the predetermined section becomes longer as the traveling speed of the vehicle increases based on the vehicle speed data. The in-vehicle hands-free device according to the above.   8. The non-receivable section setting means, when it is determined that the accident frequent occurrence point exists on a curve, sets a range including the curve as the non-receivable section. In-vehicle hands-free device.   9. The non-receivable section setting means, when it is determined that the accident frequent occurrence point is a merging point, sets a section before and after the merging point as the non-receivable section. The in-vehicle hands-free device described.   10. The hands-free control means, when executing the incoming call disabling control, notifies the other party of the incoming call that the telephone cannot be communicated via the telephone. In-vehicle hands-free device.   The in-vehicle hands-free device according to any one of claims 1 to 10, wherein the hands-free control means executes the incoming call disabling control by placing an incoming call to the telephone on hold.   A vehicle navigation apparatus comprising the in-vehicle hands-free device according to any one of claims 1 to 11.

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