JP2005163499A - Key with walking guide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a key with a walking guide device which is automatically set without user's inputting and setting of a starting point to the device, and allows the user to return to the starting point which is a destination point, that is, a locked point. <P>SOLUTION: The walking guide device 10 is provided with an electronic key, a direction detecting part for detecting a proceeding direction, a number-of-steps detecting part, and a storage part for storing the number of steps detected by the number-of-steps detecting part, and a direction detected by the direction detecting part, corresponding to the number of steps. The walking guide device 10 is provided with a control part for computing the position relation between a position at present and a position (the destination point ) at the point of time when storage of data is started in the storage part, based on data of the direction and the number of steps stored in the storage part, and an LED 14 used as a light emitting element for displaying a proceeding direction suitable for moving at least from the present point to the destination point. Storage of data on the direction and the number of steps into the storage part is started based on the locking operation of the electronic key. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a key with a walking guidance device.

  Conventionally, an autonomous portable walking guidance device has been proposed that uses GPS and does not use a Global Positioning System, calculates the distance traveled from the number of steps and the step length, and determines the direction of movement (traveling direction) using an azimuth meter to notify the position of the pedestrian. (For example, see Patent Document 1 and Patent Document 2). Moreover, as a means for knowing the current position of a pedestrian, a vehicle locking device using a GPS measurement system has been proposed (see Patent Document 3).

  The stroke detection device described in Patent Document 1 obtains a moving distance by multiplying a step number obtained using a pedometer (pedometer) and a set step length, and moves using an azimuth meter such as a geomagnetic sensor. The direction (traveling direction) is measured, and the moving distance and moving direction are sequentially stored every time the moving direction changes. In addition, the stored traveling direction is read to calculate the reverse direction, and the distance from the current position to the departure point and the direction are determined based on the stride and the distance stored in association with the read traveling direction. And calculate. The stride, the distance from the current location to the departure location, and the direction are displayed in characters on the display unit of the stroke detection device incorporated in the wristwatch.

  Further, as shown in FIG. 6, the position locating device described in Patent Document 2 includes a main body 61, a signal processing circuit 62 that processes signals from a pedometer, an azimuth meter, and the like, an operation key 63, and a pedometer 64. And a display 65. The starting point S, the destination point G, and the pedestrian's stride are input in advance using the operation keys 63, and the moving distance and direction are obtained from the pedometer and azimuth meter, and the current position is displayed on the display 65 as a display unit. A, departure point S, and destination point G are displayed.

The vehicle locking device described in Patent Literature 3 includes a GPS and a compass on an ignition key of an automobile. When the door of the automobile is locked, a door lock signal is received from the vehicle side, and simultaneously with receiving the door lock signal, the GPS signal is stored in the storage unit. Then, the shortest distance and direction from the current point to the point where the door of the vehicle is locked is displayed in characters by a display unit incorporated in the ignition key of the vehicle. And it can return to a motor vehicle, seeing the direction meter with which the ignition key of the motor vehicle is equipped.
Japanese Patent No. 3200747 (paragraphs [0009] to [0027] of the specification, FIGS. 2 and 5) Japanese Utility Model Publication No. 61-15515 (Fig. 2) Japanese Patent Laid-Open No. 11-229680 (paragraphs [0043] to [0044], FIG. 2 of the specification)

When you get lost in the first city, or when you don't know the route to return to the original location in a large parking lot, you can walk with confidence if you know the direction to return to the starting point.
In the process detection device of Patent Document 1, as a function for displaying a process when returning from a destination point to a departure point, a distance and a direction from the current point to the departure point are displayed in characters on the display unit. However, when going to an unknown place such as the first city, it is not easy to know the direction, so even if the direction is displayed, the proper direction is not known. For this reason, when returning from the current location to the departure location, the pedestrian has a device that knows the direction, such as an azimuth meter (magnet), in addition to the travel detection device, and corresponds to the direction displayed on the display of the travel detection device. Without it, you cannot go back to the starting point.

  Moreover, in patent document 2, what is aimed at returning to a departure point is not described at all. Since the starting point S, the current position A, and the destination point G are displayed on the display 65, the starting point S can be estimated by looking at the display 65, but from the starting point S to the current position A The pedestrian must go back while reading the route. It is very troublesome for the pedestrian to go back in the direction opposite to the direction displayed while looking at the display 65, and there is a high possibility that the pedestrian will mistake the direction when walking while reading.

Moreover, in either apparatus of patent document 1 and patent document 2, if a user forgets to input a starting point into the apparatus, it is useless.
Although the vehicle locking device described in Patent Document 3 uses a GPS measurement system, the GPS measurement device has a large and complicated structure, so it is inconvenient to carry as a portable device and becomes expensive. End up. In addition, since a GPS measurement system cannot perform substantial measurements unless it can receive at least three pieces of information from satellites, it can be used, for example, when walking in the basement, in a building, or in the shadow of a building. When walking on a pedestrian sidewalk, location information may not be received, and it is often impossible to measure the current location that a pedestrian wants to know.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose can be set automatically without the user having to input and set the departure point, and there is no need to use an azimuth meter separately from the walking guidance device, and the user returns to the departure point, that is, the locked point. The object is to provide a key with a walking guidance device.

  In order to achieve the above object, the invention described in claim 1 is directed to an electronic key, direction detecting means for detecting a traveling direction, number of steps detecting means for detecting the number of steps, and the number of steps detected by the number of steps detecting means. Storage means for storing the direction detected by the direction detection means corresponding to the number of steps. Further, based on the direction and step count data stored in the storage means, a calculation means for calculating a positional relationship between a current position and a position at which the storage of the data is started in the storage means, and the data Display means for displaying at least a traveling direction suitable for moving from the current location to the destination location, with the position at the time of starting storage as a destination location, and based on the locking operation of the electronic key, the storage means The storage of the direction and step count data is started. Here, the “electronic key” is a control circuit that emits radio waves by operating switches such as buttons when locking or unlocking the doors of automobiles or hotel rooms, and the radio waves are built into the doors. Means a key to be received and locked or unlocked.

  In this invention, the key is provided with the walking guidance device, and the operation of the walking guidance device is started simultaneously with locking with the electronic key, and the walking direction and the number of steps are detected and sequentially stored in the storage means. Based on the direction and step count data stored in the storage means, the calculation means calculates the relationship between the current position (current point) and the position (destination point) at the start of storing the data. Then, at least a traveling direction suitable for moving from the current location to the destination location is displayed on the display means. Therefore, the user can automatically set the departure point without inputting and setting, and it is not necessary to use an azimuth meter separately from the walking guidance device, and the user can return to the departure point that is the destination point, that is, the locked point.

  According to a second aspect of the present invention, in the first aspect of the present invention, the display means includes at least four light emitting elements arranged on each straight line so as to sandwich an intersection of two orthogonal straight lines. Yes. In the present invention, in addition to the operation of the invention described in claim 1, the traveling direction suitable for moving to the destination point is indicated by the lighting state of four or more light emitting elements constituting the display means.

  According to a third aspect of the present invention, in the first aspect of the present invention, the display means includes a display screen, and a route from the current position to the destination point can be displayed on the display screen. In this invention, in addition to the operation of the invention described in claim 1, since the route from the current position to the destination point is displayed on the display screen, only the traveling direction suitable for moving to the destination point is displayed. Not only can you know the distance to the destination.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, the gait guidance device switches the display means between an operating state and a non-operating state. Means. In this invention, in addition to the operation of the invention according to any one of claims 1 to 3, the traveling means suitable for moving to the destination point is displayed or not displayed by the switching means. You can make a choice. Therefore, power consumption is reduced as compared with a configuration in which display is always performed.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the switching unit activates the display unit via a security unit. Here, “security means” means means for confirming that the operator of the switching means is a specific person. For example, the switching means is operated by a predetermined specific operation method. Or means for checking the fingerprint of the operator.

  In this invention, in addition to the operation of the invention according to any one of claims 1 to 4, the display means does not operate only by turning on and off the switching means. Therefore, even if another person picks up the key with the walking guidance device, it is possible to prevent others from returning to the departure point and using the key.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the key with the walking guide device is a key for locking or unlocking a door of an automobile, The ignition key is separate from the electronic key, and a battery is provided in a walking guidance device in which the electronic key is integrally provided. In this invention, in addition to the operation of the invention according to any one of the first to fifth aspects, the ignition key of the automobile is separate from the electronic key. Increasing the size does not affect the size of the ignition key of the automobile, and does not hinder the operation of the ignition key of the automobile.

  According to the present invention, the user can automatically set the departure point without input setting, and it is not necessary to use an azimuth meter separately from the walking guidance device, and return to the departure point that is the destination point, that is, the locked point. Can do.

(First embodiment)
Hereinafter, a first embodiment in which the present invention is applied to a key for locking or unlocking a door of an automobile will be described with reference to FIGS. FIG. 1 is a plan view of a key with a walking guidance device (hereinafter sometimes simply referred to as a walking guidance device), FIG. 2 is a block diagram showing the electrical configuration of the walking guidance device, and FIG. 3 is a flowchart for explaining the operation. It is.

  As shown in FIG. 1, an ignition key 11 of an automobile is connected separately to a walking guidance device 10 provided with an electronic key for locking or unlocking the door of the automobile. The case 12 of the walking guidance device 10 is formed in a flat rectangular shape, and a locking switch 13a constituting an electronic key and a release switch 13b for releasing the locking are provided near one end of the case 12 on the upper surface of the case 12. ing. The electronic key has a known configuration in which a transmitter is provided and radio waves are transmitted when the locking switch 13a or the release switch 13b is operated, and the radio waves are received by a control circuit built in the door and locked or unlocked. .

  The locking switch 13a also functions as a start switch for starting the operation of a walking guidance device to be described later, and is configured such that the walking guidance device is activated by a locking operation of the locking switch 13a. The release switch 13b also functions as a stop switch that stops the operation of the walking guidance device, and is configured such that the walking guidance device is stopped by a release operation of the release switch 13b.

  On the upper surface of the case 12, eight LEDs 14 as light emitting elements that constitute display means for displaying a traveling direction suitable for moving from the local point to the destination point are provided at equal intervals in substantially the same circumference. Yes. A setting switch 15 is provided at a central position of the eight LEDs 14 as switching means for switching the display means between the operating state and the non-operating state. A battery 16 as a power source is built in the case 12.

  Next, the electrical configuration of the walking guidance device will be described. As shown in FIG. 2, the walking guidance device 10 includes a control unit 21 as a calculation unit, a step number detection unit 22 as a step number detection unit that detects the number of steps, a direction detection unit 23 as a direction detection unit that detects a direction, and an input. An input unit 24 as means, a display unit 25 as display means, and a storage unit 26 as storage means are provided.

  The number-of-steps detection unit 22 senses a motion that occurs with a walking motion and captures the number of steps as an electrical output. As the step detection unit 22, for example, a device that electrically measures a mechanical movement using a weight, or a coil or a magnetic sensor, and has a pulse amplification circuit, a counter, etc. A step detection device such as a device that accumulates pulses generated by electromagnetic induction of a magnetic sensor and geomagnetism as a step count (so-called electronic pedometer) is used. Further, any configuration may be used as long as it can detect a motion generated with a walking motion and can capture the number of steps as an electrical output. The step detection device is small and light and is built in the case 12 of the walking guidance device shown in FIG.

  The direction detection part 23 detects the direction changed when the user's walking direction changes. For example, a direction detection device such as a magnetic azimuth sensor is used which detects the horizontal component of geomagnetism with a small magnetic sensor coil made of a high permeability alloy and obtains the direction from the analog output signal. Further, any device may be used as long as it can detect the changed direction when the user's walking direction is changed. For example, a gyrocompass or other device may be used. In this embodiment, a magnetic orientation sensor is used. The direction detection device is small and light, and is built in the case 12 of the walking guidance device shown in FIG. 1 like the step detection device.

  The input unit 24 operates a locking switch 13a that also serves as a switch for operating the walking guidance device 10, a release switch 13b that also serves as a switch for stopping the operation of the walking guidance device 10, and a display unit. A setting switch 15 for setting the state or the non-operating state is provided. The setting switch 15 is configured to maintain an off state when pressed when turned on and to maintain an on state when pressed when turned off.

  The control unit 21 is constituted by a microcomputer, and inputs the detection signal of the step detection unit 22 and the detection signal of the direction detection unit 23 simultaneously with the operation of the locking switch 13a, and stores it as walking data in which the step number and the direction are associated with each other. Store in the unit 26. Specifically, the storage unit 26 sequentially stores how many steps (directions) the vehicle has advanced. Further, the control unit 21 erases the data stored in the storage unit based on the operation of the release switch 13b.

  In addition, when the control unit 21 receives an ON signal from the setting switch 15, based on the walking data stored in the storage unit 26, the positional relationship between the current position and the position at which the storage of the data is started. Is calculated. Then, the traveling direction suitable for moving from the current point to the destination point is displayed on the display unit 25 with the position at the time of starting the storage of the data as the destination point. Specifically, in this embodiment, the control unit 21 approaches the departure point from the current point based on the walking data of the route from the departure point to the position at which the display is started and the position of the current point. Are sequentially calculated each time one step is taken, and a command signal for turning on the LED 14 corresponding to that direction is output. In the first embodiment, in order to perform guidance to the destination point, the route from which the user came is faithfully reproduced and guided to the destination point (departure point) along the same route. That is, when the user of the key with the walking guidance device goes from the current location to the destination location, when the setting switch 15 is pressed, the LED 14 indicates the direction one step ahead of the current location, and arrives at the location one step ahead from the current location. Next, the direction of the point two steps before the point where the setting switch 15 is pressed is indicated by the LED 14. And the same operation | movement is performed one after another to the destination point so that the road which the user came can be faithfully turned back. That is, the control unit 21 calculates the positional relationship between the current position and the position at which the storage of the data is started in the storage unit 26 based on the direction and step count data stored in the storage unit 26. Configure the means.

  In addition, when displaying the direction to a destination point, the control part 21 determines LED14 which makes it light with the predetermined | prescribed side of the walk guidance apparatus 10 as the front. In this embodiment, the LED 14 to be lit is determined with the locking switch 13a and release switch 13b side as the front. When the LED 14 is not present in the direction for approaching the departure point, that is, the position corresponding to the direction to be displayed, a lighting command signal is output to the LED 14 near the direction. Further, even after the display operation of the display unit 25 is started, the control unit 21 sequentially inputs the detection signal of the step number detection unit 22 and the detection signal of the direction detection unit 23 and stores it as walking data in which the number of steps and the direction are associated with each other. Store in the unit 26.

  Further, the control unit 21 does not start the display operation of the display unit 25 when the setting switch 15 is simply turned on once, and is provided on the condition that a special operation, for example, a predetermined number of on / off operations are repeated. The display operation of the display unit 25 is started. This special operation constitutes a security means that prevents the direction to the destination car from being displayed even if operated by another person.

  The storage unit 26 includes a readable / rewritable memory RAM (Random Access Memory). And according to the instruction | command from the control part 21, the step number detected by the step number detection part 22 and the data of the advancing direction (movement direction) detected by the direction detection part 23 are memorize | stored sequentially.

  The display unit 25 is configured by eight LEDs 14 provided at equal intervals in the substantially same circumference. Based on the lighting command from the control unit 21, one LED 14 indicating the traveling direction is turned on.

  Next, the operation of the walking guidance device 10 configured as described above will be described. At the same time that the user gets out of the vehicle and presses the locking switch 13a, the walking number detecting unit 22 and the direction detecting unit 23 start operating, and the control unit 21 also starts operating. That is, the walking guidance device 10 starts to operate simultaneously with pressing the locking switch 13a. Then, when the user starts walking from the point where the door of the automobile is locked, the number of steps is detected (counted) by the number-of-steps detection unit 22, and the traveling direction is measured by the direction detection unit 23. In addition, when the walking guidance device 10 is fixed to a belt when used or put in a pocket or the like, the walking guidance device 10 is prevented from moving while walking.

  The CPU of the control unit 21 operates according to the flowchart of FIG. In step S1, the CPU inputs a detection signal from the step detection unit 22, and in step S2, inputs a detection signal from the direction detection unit 23. In step S3, the CPU stores the direction and the number of steps in the storage unit 26 as walking data in which the number of steps is associated with the direction. In step S4, the CPU determines whether or not the display switch has been switched to the display state by the setting switch 15. If the switch has not been switched to the display state, the process returns to step S1, and if the switch has been switched to the display state, the process proceeds to step S5.

  In step S <b> 5, the CPU calculates the positional relationship between the current position and the position at the start of storing the data, based on the walking data stored in the storage unit 26. Then, the process proceeds to step S6, and the traveling direction suitable for moving from the current point to the destination point is displayed on the display unit 25, with the position at the time when the data storage is started as the destination point. Specifically, the LED 14 corresponding to the traveling direction is determined, and a lighting command signal to the LED 14 is output.

As a result, one of the LEDs 14 mounted on the case 12 of the walking guidance device 10 is turned on, the user sees it, confirms the direction of the destination point, and walks in that direction.
Next, the CPU determines whether or not an unlocking signal has been sent in step S7. If no unlocking signal has been sent, the process returns to step S1, and if an unlocking signal has been sent, the operation ends. To do.

  Therefore, steps S1 to S4 are repeated until the display switch is requested by operating the setting switch 15, that is, until the user tries to return to the departure point, and the walking data is sequentially stored in the storage unit 26. .

  In addition, after the setting switch 15 is operated and the display state is switched to return the user to the departure point, Steps S1 to S7 are repeated until the setting switch 15 is operated and the display state is released. It is. Therefore, the user can reach the destination point (departure point) by proceeding in the direction indicated by the lit LED 14.

  When the release switch 13b is operated to arrive at the destination and release the lock on the door of the automobile, the operation of the walking guidance device 10 is stopped by the operation. In addition, the walking data stored in the storage unit is deleted.

This embodiment has the following effects.
(1) When the locking switch 13a that locks the door of the automobile is turned on, the door of the automobile is locked, and at the same time, the walking guidance device 10 starts to operate. Accordingly, the user can automatically set the departure point without input setting to the walking guidance device 10. For example, when parking in a large parking lot, etc., it is often difficult to know where the car was actually parked, but if you carry this walking guidance device 10, You can easily find your car without any problems.

  (2) The walking guidance device 10 includes a display unit 25 that displays a traveling direction suitable for moving (returning) from the current point to a point (departure point) where the walking guidance device 10 has started to operate. Therefore, the user can easily confirm a suitable direction for returning to the departure point by looking at the display unit 25.

  (3) As the display unit 25, eight LEDs 14 as light emitting elements are provided at almost equal intervals on the same circumference. That is, there are two sets of two orthogonal straight lines, the intersections coincide with each other and are arranged at equal angles, and the LEDs are arranged on each straight line so as to sandwich the intersections. And the direction of the destination point is known by lighting of one LED14. Therefore, power consumption can be reduced and control can be simplified as compared with a configuration in which a plurality of light emitting elements are simultaneously turned on to display one direction, such as an arrow display.

  (4) A setting switch 15 for setting the display unit 25 to an operating state or a non-operating state is provided. Accordingly, when the display unit 25 is not necessary, the display unit 25 is in a non-operating state, so that power consumption is reduced as compared with a configuration in which the display unit 25 is always in an operating state.

  (5) The display unit 25 cannot be activated by simply turning the setting switch 15 on, and security means is provided so that the display unit 25 cannot be activated unless a special operation is performed using the setting switch 15. Yes. Therefore, when the user drops the key with the walking guidance device, there is no risk that the user will be guided to the destination point even if the user picks it up.

  (6) The ignition key 11 of the automobile is separate from the electronic key that locks or unlocks the door of the automobile integrated with the walking guidance device 10. Therefore, even if the battery 16 is enlarged, it is not necessary to enlarge the ignition key 11 of the automobile, so that there is no inconvenience when the ignition key 11 is used.

  (7) The walking data previously stored in the storage unit 26 is erased simultaneously with the unlocking of the door of the automobile. Therefore, data stored when used before remains, and the previous data and the current data are not confused, and the guidance to the destination point is not inaccurate.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. This embodiment is greatly different from the first embodiment in that a display screen is provided as display means. Parts substantially the same as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, the case 42 of the walking guidance device 40 is formed in a flat short shape, and the locking switch 13 a, the release switch 13 b, the setting switch 15, and the step length are set on the upper surface of the case 42. Step input switch 44 is provided. In this embodiment, the locking switch 13 a, the release switch 13 b, the setting switch 15, and the stride input switch 44 constitute the input unit 24. The stride input switch 44 is used by the user to select and set a stride out of several stride options.

  Further, on the upper surface of the case 42, there is provided a display 43 constituting the display unit 25 as a display means for displaying a traveling direction suitable for moving from the current point to the destination point (departure point).

  When the control unit 21 calculates the positional relationship between the current point and the position (target point) at the time when the storage of the walking data is started in the storage unit 26, the control unit 21 sets the walking data stored in the storage unit 26 in advance. Using the calculated stride length, the travel distance is obtained by “movement distance = number of steps × step length”. When the route from the current point to the destination point is displayed on the display 43, the route is displayed as a line, and the length of the line represents the distance. The route is displayed with the side of the display 43 on the stride input switch 44 side facing forward.

  Therefore, the user can grasp the route to the destination point by looking at the route displayed on the display 43, and can return to the destination point while confirming where he is now.

In addition to the same effects as (1), (2), (4) to (7) of the first embodiment, this embodiment has the following effects.
(8) A display 43 is provided as the display unit 25. As a display method for displaying a traveling direction suitable for moving from the current location to the destination location, a route is displayed on the display 43 instead of indicating only the direction. Therefore, since the destination point is displayed more specifically than in the first embodiment, it is possible to return to the destination point in the shortest distance instead of returning to the reverse route as it is.

(Third embodiment)
Next, a third embodiment will be described. The third embodiment is different from the first embodiment in that the ignition key of the automobile and the walking guidance device are integrated. Note that substantially the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, a key portion 53 of an ignition key of an automobile is protruded from the case 52 of the walking guidance device 51. In the case 52, a locking switch 13a, a release switch 13b, and a setting switch 15 are disposed in the center of the case 52, and LEDs 54 as light emitting elements constituting the display unit 25 are arranged in the same circumferential shape around them. Four are provided at regular intervals. Each LED 54 is arranged on each straight line so as to sandwich an intersection of two orthogonal straight lines.

  When the control unit 21 displays the direction to the destination point, the control unit 21 determines the LED 54 that is lit with the side from which the key unit 53 projects as the front. When the LED 54 is present at a position corresponding to a predetermined angle range (for example, a range of ± 10 degrees) with respect to the direction to be displayed, the control unit 21 outputs a lighting command signal for lighting the LED 54. Further, the LED 54 does not exist at a position corresponding to a predetermined angle range (for example, a range of ± 10 degrees) with respect to the direction to be displayed, and there is a direction to be displayed outside the angle range between the two LEDs 54. In order to do so, a lighting command signal for lighting both LEDs 54 simultaneously is output.

  In the walking guidance device 51 of this embodiment, when one LED 54 is lit, the direction corresponding to the LED 54 indicates the direction to return to the destination point, and when two adjacent LEDs 54 are lit simultaneously, The direction between indicates the direction to return to the destination point.

According to the third embodiment, in addition to the same effects as (1), (2), and (4) to (7) of the first embodiment, the following effects are obtained.
(9) The vehicle ignition key, the electronic key for locking or unlocking the vehicle door, and the walking guidance device are integrated. Therefore, convenience for portable use is enhanced.

  (10) When the four LEDs 54 provided as the display unit 25 are provided, and the directions between the adjacent LEDs 54 are respectively indicated, the two LEDs 54 in a state of sandwiching the direction thereof are turned on at the same time. It shows the direction to be done. Therefore, eight directions can be displayed by four LEDs, which is half of the case of the first embodiment, and the manufacturing cost can be reduced.

The embodiment is not limited to the above, and may be embodied as follows, for example.
In the embodiment, the direction detection unit 23 uses a magnetic azimuth sensor, but is not limited to the magnetic azimuth sensor, and is arranged with a fixed positional relationship between the azimuth detection device and the azimuth detection device. An acceleration sensor capable of detecting three axes may be provided. Alternatively, the azimuth detecting device and a plurality of acceleration sensors may be provided. In this case, the direction of movement can be determined by comparing the direction (absolute direction) detected by the magnetic direction sensor with the acceleration vector from the acceleration sensor. Accordingly, since the direction detection unit 23 detects the movement direction of the walking guidance device 10 itself, the movement direction can be detected without fixing the walking guidance device 10 to a body or the like.

  The step number detection unit 22 may be shared by the acceleration sensor. Since the acceleration sensor can detect the number of steps from the change in acceleration accompanying walking, the number of steps may be detected from the acceleration sensor.

  ○ In the second embodiment, as a display method for guiding from the current location to the destination location, the display 43 does not display the route to the destination location, but only displays the arrow indicating the direction of the destination location, and the pedestrian To the destination point. In this case, since only an arrow is displayed, a simple configuration can be achieved. Moreover, you may combine the display of a path | route and the display of the arrow showing the direction of a destination point.

  The direction of the arrow may be displayed in the direction of the arrow, and the distance in the direction to be advanced may be displayed in the length of the arrow. If the distance in the direction in which the pedestrian is to travel is long, the arrow is displayed as a long arrow on the display 43. If the distance is short, the arrow is sequentially displayed as a short arrow. In this case, if the length of the arrow displayed on the display 43 is long, the pedestrian can save time and effort to check the display 43 many times.

  As a display means, you may provide the direction display part which shows a direction, and the direction display part which shows a advancing direction. For example, when the display screen is provided as in the second embodiment, “north” is displayed as the direction on the display screen, and the traveling direction is displayed with reference to north.

  ○ When the distance to the destination point or the number of steps reaches a predetermined distance or a predetermined number of steps, a destination point approach display means may be provided to indicate that. For example, LEDs 14 and 54 can be blinked or blinked quickly so that the lighting state is different from the normal state, or another LED is provided to light the LED, or LEDs 14 and 54 can be lit in different colors May be provided to change the lighting color. In this case, it can be easily understood that the destination point is close. The “predetermined distance or the predetermined number of steps” means a value corresponding to a distance at which the user can easily visually confirm the destination point, for example, a distance within 10 m or a number of steps corresponding to the distance.

  ○ When inputting the stride with the stride input switch 44, it may be configured to directly input a numerical value, instead of selecting and setting from a plurality of step count options. In this case, the stride can be input more accurately.

  ○ In order to guide to the destination point, the first mode that faithfully reproduces the way the user came and guides it to the destination point (departure point) on the same route, and the closest way to the destination point or It is good also as a structure which comprises two modes with the 2nd mode which displays the direction of a destination point, and a display is made by the mode which the user selected. In this case, it is possible to return to the destination point with the shortest distance. For example, in the walking guidance devices 10 and 51 of the first or third embodiment, when used in a place with good visibility, such as a parking lot, by using the second mode that displays the direction of the destination, Can return to a straight line.

○ The engine ignition key may also be an electronic key.
○ It can be used not only for car keys but also for hotel electronic keys and bicycle keys. In this case, the same effect as when applied to a car key can be obtained.

  ○ In the configuration in which the distance is also displayed when the traveling direction to the destination point is displayed as in the second embodiment, instead of the combination of the number of steps and the direction as the walking data to be stored in the storage unit 26, the distance and It is good also as a combination with a direction. For example, using the number of steps measured by the number-of-steps detection unit 22 and a preset step length, a movement distance is obtained by “movement distance = step number × step length”, and when the walking data is stored in the storage unit 26, the movement distance And the traveling direction are stored in the storage unit 26.

  As a security means, instead of a method of performing a special operation of the setting switch 15, a method of operating the locking switch 13a, the release switch 13b, and the setting switch 15 in combination may be employed. In this case, it is necessary to temporarily stop the function of the locking switch 13a and the release switch 13b as the operation or stop switch of the walking guidance devices 10, 40, 51.

  ○ A method may be adopted in which fingerprints, voiceprints, retinas, etc. are used as security means to determine whether or not the user is a legitimate user. In this case, it is possible to determine whether or not the user is a legitimate user with higher accuracy.

○ Security measures are not essential and security measures need not be provided.
The walking guidance device 10, 40, 51 starts to operate by the locking operation of the locking switch 13 a, and the walking data is stored in the storage unit 26, and then the walking guidance device 10 is immediately operated when the release switch 13 b is operated. , 40, 51 are not limited to the configuration in which the walking data stored in the storage unit 26 is deleted. For example, when the release switch 13b is operated, it is determined whether or not the current point substantially coincides with the destination point. If they substantially coincide, the operation of the walking guidance devices 10, 40 and 51 is stopped and stored. The walking data in the unit 26 may be deleted. In this case, even if the user operates the release switch 13b by mistake, the operation of the walking guidance devices 10, 40, and 51 is continued, so that it is possible to prevent the walking data from being erased by an erroneous operation.

  In the first embodiment, the light emitting element does not have to be an LED, and any element that emits light may be used. For example, an organic EL, an inorganic EL, a miniature light bulb, or the like may be used.

The following technical idea (invention) can be understood from the embodiment.
(1) The invention according to any one of claims 1 to 6, further comprising destination point approach display means for indicating that the distance or the number of steps to the destination point has reached a predetermined distance or a predetermined number of steps. .

  (2) In the invention described in the technical idea (1), the destination point approach display means has approached the destination point by making the lighting state of the light emitting element different from the lighting state until approaching the destination point. Is displayed.

  (3) In the invention according to any one of claims 1 to 6, the display means includes a direction display unit indicating a specific direction and a display unit indicating the traveling direction by direction. .

The schematic plan view of the key with a walk guidance device. The block diagram which shows the electrical constitution of a walk guidance device. The flowchart which shows operation | movement of CPU. The schematic plan view of the key with a walk guidance device of a 2nd embodiment. The schematic plan view of the key with the walk guidance device of 3rd Embodiment. The model perspective view of the position locating device of a prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,40,51 ... Walk guidance device (key with walk guidance device), 11 ... Ignition key, 13a ... Locking switch which comprises an electronic key, 13b ... Similarly release switch, 14, 54 ... LED as light emitting element, 15 ... Configuration switch as switching means and constituting security means, 16... Battery, 21... Control section as calculation means, 22... Step detection section as step detection means, 23 .. direction detection section as direction detection means, 24 ... an input unit as an input unit, 25 ... a display unit as a display unit, 26 ... a storage unit as a storage unit, 43 ... a display constituting a display screen.

Claims (6)

An electronic key,
Direction detecting means for detecting a traveling direction;
Step detection means for detecting the number of steps;
Storage means for storing the number of steps detected by the number of steps detection means and the direction detected by the direction detection means corresponding to the number of steps;
Based on the direction and step count data stored in the storage means, a calculation means for calculating the positional relationship between the current position and the position at which the storage of the data is started in the storage means;
A display means for displaying a traveling direction suitable for moving from the current point to the destination point, with the position at the time of starting the storage of the data as a destination point,
A key with a walking guidance device that starts storing the data of the direction and the number of steps in the storage means based on a locking operation of the electronic key.   2. The key with a walking guidance device according to claim 1, wherein the display unit includes four or more light-emitting elements arranged on each straight line so as to sandwich an intersection of at least two orthogonal straight lines.   The key with a walking guidance device according to claim 1, wherein the display unit includes a display screen, and a route from a current position to the destination point can be displayed on the display screen.   The said walk guidance device is a key with a walk guidance device as described in any one of Claims 1-3 provided with the switching means to make the said display means into an operation state or a non-operation state.   The key with a walking guidance device according to any one of claims 1 to 4, wherein the switching unit activates the display unit via a security unit.   The key with the walking guidance device is a key for locking or unlocking the door of the automobile, and the ignition key of the automobile is separate from the electronic key, and the walking guidance device is integrally equipped with the electronic key. The key with the walk guidance device according to any one of claims 1 to 5, wherein the battery is equipped.

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