Self-propelled vehicles

Abstract

To enable a vehicle with a self-propelling function to easily take an action to avoid a risk of a person around such a vehicle and to suppress an unrightful utilization.SOLUTION: A vehicle with a self-propelling function according to an example of an embodiment has the self-propelling function by an electronic motor, is capable of changing, as a vehicle state, at least one or more of the maximum speed in self-propelling, the maximum output by the electronic motor, and the dimension of the vehicle with the self-propelling function, and includes a notifying unit that gives a notification which means the present vehicle state.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a vehicle with a self-propelled function that is self-propelled by an electric motor. [Background technology]

[0002] Patent document 1 describes a configuration for an electrically assisted bicycle that includes an electric drive unit that assists a pedal drive unit and has an electric motor, and a manual switch that causes the electric drive unit to self-propel, in which the pedals are fixed by a pedal fixing means and the electric drive unit is caused to self-propel when the manual switch is operated. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-324289 Summary of the Invention [Problem to be solved by the invention]

[0004] It is conceivable that the electrically power-assisted bicycle described in Patent Document 1 could have its vehicle state, such as its maximum speed when self-propelled, switchable. For example, to improve safety when riding on roadways, it is conceivable to increase the maximum speed when self-propelled so that it approaches the traveling speed of other vehicles, such as passenger cars. On the other hand, when riding on sidewalks, it is conceivable to lower the maximum speed when self-propelled to improve safety for pedestrians. It is also conceivable that the vehicle state could be switchable between the maximum output of the electric motor and the size of the vehicle. It is also conceivable that the vehicle state could be switchable between assisted riding, in which auxiliary power output from the electric motor is added in accordance with the magnitude of the pedaling force to the human driving force exerted by the user on the pedals, and a self-propelled state in which the electrically power-assisted bicycle runs solely on its own power.

[0005] However, if nearby people, such as pedestrians, cannot determine the current vehicle condition of the above-mentioned electrically power-assisted bicycle, such as its maximum speed while in motion, it is difficult for them to predict danger posed by the bicycle and take action to avoid it. Furthermore, in such cases, nearby people, such as police officers, cannot determine whether the electrically power-assisted bicycle is being used properly. This leaves room for improvement in terms of preventing the unauthorized use of electrically power-assisted bicycles. This type of problem can also occur in other vehicles with self-propelled functions that use an electric motor.

[0006] An object of the present disclosure is to make it easier for a self-propelled vehicle to take action to avoid danger to people around it, and to prevent unauthorized use. [Means for solving the problem]

[0007] A self-propelled vehicle that is one aspect of the present disclosure is a self-propelled vehicle that has a self-propelled function using an electric motor, and is capable of switching between at least one or more of the vehicle state: maximum speed when self-propelled, maximum output of the electric motor, and size of the self-propelled vehicle, and is equipped with an alarm unit that issues an alarm indicating the current vehicle state. [Effects of the Invention]

[0008] According to the self-propelled vehicle of the present disclosure, a notification indicating the current vehicle state is issued, making it easier for people in the vicinity to determine the current vehicle state of the vehicle. This makes it easier for people in the vicinity to take action to avoid danger to the vehicle, and also makes it easier for people in the vicinity to determine whether the vehicle is being used in an appropriate state, thereby preventing unauthorized use of the vehicle. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing an electrically assisted bicycle as an example of a vehicle with a self-propelled function according to an embodiment. [Figure 2]FIG. 2 is a block diagram of the configuration of the electrically assisted bicycle of FIG. 1, focusing on the control device. [Figure 3] 2 is a diagram showing one end of a handle on which a hand switch device having a mode switching section for switching the maximum speed is attached in the electrically assisted bicycle of FIG. 1. FIG. [Figure 4] 1. FIG. 4 is a diagram showing a state in which the display of the speed mode is switched in the mode informing device of FIG. [Figure 5] 10 is a flowchart showing a method for informing the user of the speed mode and transitioning to self-propelled mode in the electrically assisted bicycle of FIG. 1. [Figure 6] 10 is a view corresponding to FIG. 3 of an electrically assisted bicycle according to another embodiment of the present invention. [Figure 7] 7 is a perspective view of the hand switch device of FIG. 6, seen obliquely from the upper left side. [Figure 8] 7 is a view of the top surface of the hand switch as seen in the direction of arrow A in FIG. 6. [Figure 9] FIG. 10 is a diagram showing a state in which a user holds a grip at one end of the handle and presses down a manual switch. [Figure 10] 10 is a diagram showing a state in which the maximum speed is changed while the user is gripping the grip at the other end of the handlebars in an electrically assisted bicycle according to another embodiment. FIG. [Figure 11] FIG. 10 is a perspective view showing an electric kickboard, which is another example of a self-propelled vehicle according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a self-propelled vehicle according to an embodiment of the present disclosure will be described in detail with reference to the drawings. The numerical values, shapes, and positions described below are examples for the purpose of explanation and can be changed as appropriate depending on the specifications of the self-propelled vehicle. In the following, the same reference numerals will be used to designate equivalent elements in all drawings. Furthermore, in the description below, the reference numerals previously described will be used as necessary.

[0011] FIG. 1 is a diagram showing an electrically assisted bicycle 1, which is an example of a self-propelled vehicle according to an embodiment of the present disclosure. Note that the electrically assisted bicycle according to the embodiment is not limited to a city bicycle as shown in FIG. 1, but may be, for example, a sports bicycle, a folding bicycle, or the like. In the following description, up / down, left / right, and front / rear refer to the up / down, left / right, and front / rear directions, respectively, in the normal state of use, i.e., when the bicycle is upright in the same position as when riding straight ahead. For example, "up" refers to the vertically upward direction when the bicycle is in the same position as when riding straight ahead.

[0012] As shown in FIG. 1, the electrically power-assisted bicycle 1 can operate in two modes: an assist mode, which provides assistance when pedaling the pedals 7, and a self-propelled mode, which allows the motor 21 (FIG. 2) to output self-propelled power for propulsion. The motor 21 corresponds to an electric motor. In the "assist mode," the bicycle propels by adding auxiliary power output from the motor 21 according to the magnitude of the pedaling force to the human driving force generated by the pedaling force applied to the pedals 7. In the "self-propelled mode," the electrically power-assisted bicycle 1 is propelled by outputting self-propelled power from the motor 21 while a person is riding the bicycle. Note that the "self-propelled mode" may also be referred to as a "push-walking or self-propelled mode," in which the motor 21 applies self-propelled power to the body of the electrically power-assisted bicycle 1 when a person pushes the bicycle, or the motor 21 applies self-propelled power to the body of the electrically power-assisted bicycle 1 when a person dismounts and supports the bicycle. In this self-propelled mode, the bicycle can propel itself even when the person is not applying a force pushing the bicycle forward. Thus, "self-propelled" means that the electrically assisted bicycle is propelled solely by its own power (self-propelling power), regardless of whether or not a person is riding the electrically assisted bicycle, which is a vehicle. A sensor mounted on grip 4a (Fig. 3) or the like may detect the force applied to the front of the bicycle, and the magnitude of the force may be used to determine whether or not the person is riding the electrically assisted bicycle 1. For example, if it is determined that the person is not riding the electrically assisted bicycle 1, a second speed mode (described below) in which the maximum speed when self-propelled is second speed may be implemented, and if it is determined that the person is riding the electrically assisted bicycle 1, a first speed mode (described below) in which the maximum speed when self-propelled is higher than second speed may be implemented.

[0013] The electrically assisted bicycle 1 includes a frame 2, a front wheel 3a, a rear wheel 3b, handlebars 4, a saddle 5, crank arms 6, pedals 7, a battery 10, and a motor unit 20. When the electrically assisted bicycle 1 is in an assist mode, the force (pedaling force) applied by the user to the pedals 7 is assisted by a motor included in the motor unit 20. In this embodiment, the pedaling force of the pedals 7 and the output of the motor 21 are transmitted to the rear wheel 3b via a chain 8.

[0014] The frame 2 connects the front wheel 3a, rear wheel 3b, handlebars 4, saddle 5, etc., and supports the battery 10 and motor 21. The frame 2 is made up of multiple pipes. In this embodiment, the multiple pipes include a head pipe 2a, a front fork 2b, a down pipe 2c, a seat pipe 2d, a chain stay 2e, a seat stay 2f, and a bottom bracket (not shown). The bottom bracket is a pipe that connects the down pipe 2c, the seat pipe 2d, and the chain stay 2e.

[0015] A steering column 12 is connected to the lower end of the handlebars 4 via a stem 11. The steering column 12 is rotatably inserted inside the head pipe 2a, and a front fork 2b is supported at the lower end of the steering column 12. The front fork 2b has a pair of legs that rotatably support the front wheel 3a.

[0016] The down pipe 2c is a pipe that connects the head pipe 2a and the bottom bracket. The down pipe 2c is inclined so that it is positioned higher the closer it is to the front of the electrically assisted bicycle 1. The seat pipe 2d is a pipe that holds the saddle 5. A user sits on the saddle 5. In this embodiment, the battery 10 is attached to the seat pipe 2d, and the motor unit 20 is attached to the bottom bracket.

[0017] The chainstays 2e are pipes connecting the seat stays 2f and the bottom bracket. They extend from the rear end of the bottom bracket toward the rear of the bicycle, with one on each side sandwiching the rear wheel 3b. Like the chainstays 2e, the seat stays 2f are also provided, one on each side, sandwiching the rear wheel 3b. The left and right seat stays 2f extend from the top of the seat pipe 2d to the radial center of the rear wheel 3b and are connected one-to-one to the left and right chainstays 2e at this center. The rear wheel 3b is rotatably supported at the rear end of the chainstays 2e. A carrier 13 for carrying luggage is located behind the saddle 5. The front sides of the carriers 13 are connected to the left and right seat stays 2f.

[0018] The electrically assisted bicycle 1 includes an input shaft (not shown) to which one end of the crank arm 6 is attached, a drive sprocket that rotates as the input shaft rotates, and a rear wheel sprocket attached to the rear wheel 3b (all of which are not shown), with the drive sprocket and rear wheel sprocket connected via a chain 8. Pedals 7 attached to the crank arm 6 and other parts are provided on each side of the electrically assisted bicycle 1, and one end of each of the pair of crank arms 6 is connected to each other via the input shaft. In this embodiment, power output from the motor 21 is transmitted to the drive sprocket via a reduction gear or the like, and then transmitted to the rear wheel 3b via the chain 8.

[0019] The battery 10 is a power supply device that supplies power to at least the motor unit 20. The battery 10 may be configured to supply power to devices other than the motor unit 20, such as the headlight 9.

[0020] The motor unit 20 is a drive unit that assists the pedal force of the pedal 7. The output of the motor unit 20 is controlled to drive a motor 21 (FIG. 2), which will be described later, based on, for example, the pedal force, which is the torque acting on the input shaft, and the number of rotations per unit time of the input shaft. The driving of the motor 21 is controlled by a control device 40 (FIG. 2), which will be described later. At least a portion of the control device 40 may be housed together with the motor 21 in the housing of the motor unit 20, and may be unitized with the motor 21.

[0021] FIG. 2 is a block diagram of the configuration of the electrically assisted bicycle 1, centered around the control device 40. The control device 40 is connected to the motor 21, the sensor switch group 30, and mode notification devices 50, 51, 52, and 53. The control device 40 is, for example, a microcomputer, and includes a processor for executing calculations, memory for storing measurement data used in the calculations, calculation results, processing programs, and the like, and input / output ports. The processor is, for example, a CPU, and has the function of reading and executing processing programs stored in the memory. Generally, each function of the control device 40 is realized by executing the processing programs. The memory is, for example, a nonvolatile memory such as ROM or a volatile memory such as RAM. The control device 40 has the function of causing the electrically assisted bicycle 1 to execute each of the assist mode and the self-propelled mode, and the function of causing the mode notification devices 50, 51, 52, and 53 to issue notifications indicating the maximum self-propelled speed, which is the current vehicle state after switching, in response to switching by the mode switching unit 48.

[0022] The output of the motor 21 is controlled by the control device 40 via a drive circuit (not shown) included in the motor unit 20. The motor 21 is, for example, a three-phase brushless DC motor. The motor 21 can have various configurations as long as it is an electric motor driven by power supplied from the battery 10.

[0023] The sensor switch group 30 includes a pedal force sensor 33, a vehicle speed sensor 34, a crank rotation sensor 35, a power switch 37, a mode switching unit 38, and a manual switch 39. The pedal force sensor 33 is, for example, a magnetostrictive torque sensor, and detects the human driving force generated when the input shaft rotates based on the human driving force, which is the pedal force applied to the pedal. Information indicating the detection value of the pedal force sensor 33 is sent to the control device 40.

[0024] The vehicle speed sensor 34 is provided, for example, at the lower end of the front fork 2b, and detects the traveling speed of the power-assisted bicycle 1 from the number of rotations per unit time of the front wheel 3a. Information representing the detected value of the vehicle speed sensor 34 is sent to the control device 40. The vehicle speed sensor 34 is, for example, a speed sensor such as a wheel sensor. The vehicle speed sensor 34 may also be attached to a rotation support portion of the rear wheel 3b, and detect the traveling speed of the power-assisted bicycle 1 from the number of rotations of the rear wheel 3b.

[0025] The crank rotation sensor 35 detects the number of rotations per unit time of the input shaft. Information representing the detected value of the crank rotation sensor 35 is transmitted to the control device 40. The crank rotation sensor 35 includes, for example, a gear-shaped rotating body and a light emitting section and a light receiving section on either side of the rotating body.

[0026] The power switch 37 is a start-up switch that supplies power from the battery 10 to the control device 40 and starts up the control device 40. The assist mode is executed when the power switch 37 is turned on, an assist mode switch 55 shown in FIG. 3 (described later) is pressed down, and the user depresses the pedal 7. When the assist mode is executed, the control device 40 calculates the assist power to be output from the motor 21 based on the detected value of the pedal force on the pedal 7 and the detected value of the vehicle speed sensor 34, and drives the motor 21 with the calculated assist power. The power switch 37 is provided on a hand switch device 36 attached near the grip 4a at one end of the handlebar 4, as shown in FIG. 3 (described later).

[0027] The mode switching unit 38 has a first speed mode switch and a second speed mode switch. When the power switch 37 is turned on and either speed mode switch is pressed, the self-propelled mode is selected and the maximum self-propelled speed is set to either the first speed or the second speed. As shown in FIG. 3 (described later), the first speed mode switch 38a and the second speed mode switch 38b are provided on the handheld switch device 36. When the first speed mode switch 38a is pressed, the maximum self-propelled speed is set to the first speed, and when the second speed mode switch 38b is pressed, the maximum self-propelled speed is set to the second speed. The first speed is a high speed, e.g., 15 km / h, and the second speed is a speed slower than the first speed, e.g., 6 km / h. A signal indicating the operation of each speed mode switch 38a, 38b is sent to the control device 40. By switching the speed mode switches 38a, 38b, the electrically power assisted bicycle 1 can change its maximum self-propelled speed as a vehicle state. The maximum speed is the upper limit of the speed of the power-assisted bicycle 1 and is a threshold for stopping the output of the motor 21. The speed of the power-assisted bicycle 1 may be configured not to reach the maximum speed by the motor 21 reaching its output upper limit.

[0028] When a command to switch the maximum speed during self-propelled riding is issued by operating the mode switching unit 38, the control device 40 causes the multiple mode notification devices 50, 51, 52, and 53 to issue a notification indicating the current maximum speed after switching. When the manual switch 39 provided on the hand switch device 36 is turned on, the control device 40 causes the motor 21 to output self-propelled power, thereby executing the self-propelled mode. This allows the electrically power-assisted bicycle 1 to have a self-propelled function using the motor 21.

[0029] Each mode notification device 50, 51, 52, 53 is a notification unit that notifies the current maximum speed and is visually identifiable from the outside. The multiple mode notification devices 50, 51, 52, 53 consist of a first mode notification device 50 attached to the handlebar 4, a second mode notification device 51 attached to the carrier 13, a third mode notification device 52 attached to the front basket 14, and a fourth mode notification device 53 fixed to the lower end of the front fork 2b and extending and retracting in the vertical direction. Each mode notification device 50, 51, 52, 53 will be described in detail later.

[0030] FIG. 3 shows one end of the handlebar 4 of the electrically assisted bicycle 1, to which a hand switch device 36 having a mode switching unit 38 is attached. The hand switch device 36 is attached near a grip 4a at one end of the handlebar 4. The grip 4a is the part that the user holds with their hand while sitting on the saddle 5. The grip 4a is also used as the part that the user holds when they get off the bicycle and push it around. A ring portion 61 of a brake lever device 60 is fitted and fixed near the grip 4a at one end of the handlebar 4. When gripped by the user, the brake lever device 60 drives a brake device attached to the rear wheel 3b, braking the rear wheel 3b.

[0031] The hand switch device 36 has a substantially rectangular parallelepiped case 36a, a mode switching unit 38 provided near the top surface of the case 36a, a plurality of switches 37, 39, 55, 56, and a display unit 57. The hand switch device 36 is attached near the grip 4a of the handlebars 4 by a ring portion (not shown) fixed to the lower end of the case 36a. The ring portion of the hand switch device 36 is fitted or fastened to a portion of one end of the handlebars 4 that is closer to the stem 11 of the bicycle than the ring portion 61 of the brake lever device 60. The ring portion of the hand switch device 36 may be an attachment band.

[0032] The first speed mode switch 38a and the second speed mode switch 38b of the mode switching unit 38 are provided adjacent to each other near the top surface of the hand switch device 36. The multiple switches 37, 39, 55, 56 include a power switch 37, a manual switch 39, an assist mode switch 55, and a power-off mode switch 56. Each of the switches 37, 39, 55, 56 is a push button switch that can be operated by, for example, pressing down. Furthermore, switching by each of the speed mode switches 38a, 38b, the assist mode switch 55, and the power-off mode switch 56 is effective regardless of whether the vehicle is moving or stopped.

[0033] The manual switch 39 accepts a user operation to execute the "self-propelled mode" when the first speed mode switch 38a or the second speed mode switch 38b is operated and the self-propelled mode is enabled. The manual switch 39 is, for example, a momentary switch, and continues to output a self-propelled mode ON signal to the control device 40 to execute the self-propelled mode only when the manual switch 39 is pressed down by the user. If the manual switch 39 is not pressed down, the self-propelled mode ON signal is not output to the control device 40. This stops the output of auxiliary power from the motor 21 when the user's finger is removed from the manual switch 39, further improving safety.

[0034] The power-off mode switch 56 is provided to turn off the power supply and cut off the power supply from the battery 10 to the motor 21 .

[0035] The display unit 57 is, for example, a liquid crystal display, and can display that the speed mode switches 38a, 38b and the assist mode switch 55 have been switched to one of them. The display on the display unit 57 is controlled by the control device 40. When the power off mode switch 56 is operated, the display on the display unit 57 may be turned off.

[0036] Next, the multiple mode notification devices 50, 51, 52, and 53 will be described. Each mode notification device 50, 51, 52, and 53 notifies the user of the current maximum speed during self-propelled driving. First, the first mode notification device 50 is attached near the grip 4b at the other end of the handlebar 4. The first mode notification device 50 includes a light source that indicates the current maximum speed during self-propelled driving by changing its illumination state. The light source changes its illumination state, for example, by changing the color of light emitted when switched to the first speed mode and when switched to the second speed mode. The first speed mode is a mode in which the maximum speed during self-propelled driving is the first speed, and corresponds to the first self-propelled mode. The second speed mode is a mode in which the maximum speed during self-propelled driving is the second speed, and corresponds to the second self-propelled mode, which is different from the first self-propelled mode. The electrically assisted bicycle 1 issues a first notification when the first speed mode is being executed, and issues a second notification different from the first notification when the second speed mode is being executed. For example, when switching to the first speed mode, the light source is illuminated in red as the first notification, and when switching to the second speed mode, the light source is illuminated in blue as the second notification. The light source may include, for example, multiple LEDs that illuminate in different colors, and the color of the LEDs that illuminate may be switched depending on the speed mode. Furthermore, when switching to the assist mode and when switching to the power-off mode, the light source may be illuminated in a color different from that used when switching to each speed mode, or may be turned off or flashing. For example, when switching to the assist mode, the light source may be illuminated in green, and when switching to the power-off mode, the light source may be turned off or flashing. The light source may be configured to illuminate and flash separately when switching to the first speed mode and when switching to the second speed mode. The light source of the first mode notification device 50 may be installed in a location that is easily visible from the outside other than the handlebars 4. For example, the light source of the first mode notification device 50 may be a lamp such as a headlight 9 mounted on the front side of the electrically assisted bicycle 1 or a taillight mounted on the rear side.

[0037] Second mode notification device 51 is attached to the rear end of bicycle carrier 13 so as to face diagonally upward and rearward. Second mode notification device 51 includes a display unit 51a (FIG. 4) that displays the current maximum speed as a notification of the current maximum speed when traveling and provides a display that can be visually identified from the outside.

[0038] FIG. 4 shows the state in which the display of the speed mode is switched on the second mode notification device 51. The display unit 51a of the second mode notification device 51 is, for example, a liquid crystal display, and its upper end is attached to the rear end of the carrier 13 with screws, brackets, etc., so that it can be seen from the outside. FIG. 4(a) shows the display when switched to the first speed mode, and FIG. 4(b) shows the display when switched to the second speed mode. In addition to indicating the switch to each speed mode, the display unit 51a may also display an indication of the assist mode when switched to the assist mode. The display on the display unit 51a may be turned off when switched to the power off mode.

[0039] The second mode notification device 51 may also have a movable cover that can switch between a state in which the upper side of the display unit 51a is covered and a state in which the display unit 51a is exposed to the outside. The cover is moved relative to the display unit 51a by, for example, an electric actuator. The display unit may display text such as "first mode," and the cover may move to expose the display unit after switching to the first speed mode, and move to hide the display unit after switching to the second speed mode. The cover may operate to hide the display unit 51a in the assist mode and expose the display unit 51a in the first speed mode and the second speed mode (self-propelled mode). The power-assisted bicycle 1 can switch between a state in which it can perform assisted riding or self-propelled riding, and the display unit 51a, which serves as a notification unit, notifies the user of the current vehicle state.

[0040] The third mode notification device 52 is attached to the front end of the front basket 14 in front of the head pipe 2a of the bicycle, with its display facing forward. The third mode notification device 52 includes a display unit having the same configuration and function as the display unit 51a of the second mode notification device 51.

[0041] The fourth mode notification device 53 includes a moving body 53a that indicates the current maximum speed during self-propelled riding by representing the current maximum speed as a movement of the bicycle. The fourth mode notification device 53 has its lower end fixed to the lower end of the front fork 2b so as to be aligned vertically and is configured to be extendable in the vertical direction. The moving body 53a has an upper tube 53c that is fitted inside a lower tube 53b fixed to the lower end of the front fork 2b so as to be slidable in the axial direction, and a plate-like indicator 53d that is fixed to the upper end of the upper tube 53c and extends rearward. One or both sides of the indicator 53d are marked with a symbol indicating the first speed mode, such as the word "first mode." The indicator 53d may not have any text, and both sides may be colored red, yellow, or another color that stands out from the outside. Alternatively, a fixed portion of an electric linear actuator may be fixed to the inside of the lower cylinder 53b, and a moving portion of the linear actuator that can move up and down may be fixed to the inside of the upper cylinder 53c. The motor of the linear actuator is controlled by the control device 40.

[0042] Furthermore, when switching to the first speed mode, the control device 40 moves the indicator 53d together with the upper cylinder 53c upward as shown by the solid line in FIG. 1. At this time, the moving body 53a indicates by moving upward that the current maximum speed during self-propulsion is the first speed of the first speed mode. Furthermore, when switching to the second speed mode, the control device 40 moves the indicator 53d together with the upper cylinder 53c downward as shown by the two-dot chain line in FIG. 1. At this time, the moving body 53a indicates by moving downward that the current maximum speed during self-propulsion is the second speed of the second speed mode.

[0043] Fig. 5 is a flowchart showing a method for announcing a speed mode and transitioning to self-propelled mode on the electrically assisted bicycle 1. The flowchart in Fig. 5 is executed by the control device 40. In step S10, it is determined whether one of the speed mode switches 38a, 38b (Fig. 3) has been operated to set the self-propelled mode. If the determination in step S10 is affirmative (YES), the speed mode corresponding to the speed mode switch selected in step S12 is announced by the multiple mode notification devices 50, 51, 52, 53, and the process proceeds to step S14. If the determination in step S10 is negative (NO), the process of step S10 is repeated.

[0044] In step S14, it is determined whether the manual switch 39 is turned on. If the determination in step S14 is affirmative (YES), the process proceeds to step S16, where the self-propelled mode corresponding to the selected speed mode switch is executed, and the process ends. If the determination in step S14 is negative (NO), the process returns to step S10 and is repeated. Note that if the self-propelled mode is executed in step S16, the notification may be made in a manner different from the notification made in step S12. For example, if the speed mode was indicated by the flashing state of the first mode notification device 50 in step S12, the fact that the speed mode and self-propelled mode are being executed may be notified in step S16 by the lighting state of the first mode notification device 50.

[0045] The above-described electrically power-assisted bicycle 1 provides a visually identifiable notification of the current maximum speed at which the bicycle is traveling, making it easier for nearby people to determine the current maximum speed of the electrically power-assisted bicycle 1. This makes it easier for nearby people, such as pedestrians, to take action to avoid danger from the electrically power-assisted bicycle 1. It also makes it easier for nearby people, such as police officers, to determine whether the electrically power-assisted bicycle 1 is being used properly. For example, even if electrically power-assisted bicycles 1 are prohibited from riding on sidewalks at that maximum speed, it becomes easier to spot an electrically power-assisted bicycle 1 riding on the sidewalk, making it easier for police officers to crack down on violators. This makes it possible to curb the unauthorized use of electrically power-assisted bicycles 1.

[0046] In the configuration of this example, the notification of the current maximum speed when self-propelled is performed by the multiple mode notification devices 50, 51, 52, and 53. However, the electrically assisted bicycle may be provided with only one, two, or three of the multiple mode notification devices 50, 51, 52, and 53, and the notification of the current maximum speed when self-propelled may be performed by one of these mode notification devices.

[0047] Furthermore, the operating section for setting the power-assisted bicycle 1 to enable self-propelled mode is not limited to the button-type speed mode switches 38a, 38b shown in FIG. 3, but may be a lever-type or throttle-type switch.

[0048] The control device 40 may also store in a memory unit a mode history for a predetermined period of time prior to the current time, including the most recent speed mode of the electrically assisted bicycle 1, along with the time of mode change. A confirmation mode switch may be provided in the hand switch device 36 or the like, and when the confirmation mode switch is operated, the history stored in the memory unit may be output via wired or wireless communication to a personal computer (PC) or a mobile information terminal such as a smartphone. This allows police officers and others to check the history and confirm any false determinations regarding violations.

[0049] FIG. 6 is a diagram corresponding to FIG. 3 of an electrically assisted bicycle 1a according to another embodiment. FIG. 7 is a perspective view of the hand switch device 70, seen from the diagonally upper left. FIG. 8 is a view of the top surface of the hand switch device 70, seen in the direction of arrow A in FIG. 6. In this configuration, when a manual switch 71 provided on the hand switch device 70 is operated, the bicycle is switched to either the push-walk or self-propelled mode. As shown in FIG. 7, the hand switch device 70 is oriented such that the top surface of the case 70a on which multiple switches are provided faces diagonally upward so that they are easily visible to a rider. The hand switch device 70 is provided with the manual switch 71, the lighted switch 72, the power switch 37, the assist mode switching unit 74, and the display unit 75 near the top surface of the case 70a. The manual switch 71, the lighted switch 72, and the power switch 37 are arranged side by side along the saddle-side side surface 70b of the case 70a. The manual switch 71 is located closest to the grip 4a among multiple switches 71, 72, 37 arranged near the saddle-side side surface 70b. The manual switch 71 is provided with an illumination part 71a, which lights up when the manual switch 71 is pressed down, allowing the user to confirm that the bicycle is in push-walking or self-propelled mode.

[0050] As shown in Fig. 7, the upper end of the hand switch device 70 and the upper end of the grip 4a of the handle 4 are at approximately the same position in the up-down direction. Also, as shown in Fig. 8, the manual switch 71 is higher in the thickness direction of the hand switch device 70 than other switches on the hand switch device 70, such as the power switch 37. This makes it easier for the user to operate the manual switch 71.

[0051] The light switch 72 is a switch for turning on the headlights 9 (Fig. 1). The assist switching unit 74 has an UP button 74a and a DOWN button 74b, and by accepting a user's operation regarding the pedaling force when the assist mode is being executed, it is possible to change the proportion of the auxiliary power output by the motor 21 (Fig. 2). The display unit 75 displays the proportion of the auxiliary power output by the motor 21. When the push-walking or self-propelled mode is being executed, the display unit 75 displays, for example, the word "100%."

[0052] FIG. 9 shows a state in which the user 100 presses down the manual switch 71 while gripping the grip 4b at one end of the handlebars. For example, the user 100 dismounts from the bicycle and grips the grip 4a at one end of the handlebars 4 with one hand, and grips the grip 4b attached to the other end of the handlebars 4 (shown in FIG. 10 and described later) with the other hand (not shown), with the thumb 101 of one hand naturally extended straight as shown in FIG. 9. In this state, the manual switch 71 is positioned so that it can be pressed by the thumb 101. Therefore, when the user 100 grips the grip 4a, the manual switch 71 is positioned below the thumb 101, making it easier for the user 100 to operate the manual switch 71 by pressing down the thumb 101 without having to assume an awkward position of the fingers or arm.

[0053] In this example, the assist mode is executed when the power switch 37 is turned on and the user depresses the pedal 7. The push-walk or self-propelled mode is executed when the power switch 37 is turned on and the user operates the manual switch 71.

[0054] FIG. 10 shows the state in which a user 100 is gripping a grip 4b at the other end of the handlebar 4 of an electrically assisted bicycle 1a and changing the maximum speed. The grip 4b at the other end of the handlebar 4 is supported on a fixed shaft (not shown) of the handlebar 4 so as to be rotatable in both directions. Rotating the grip 4b inward in the direction of arrow α gradually lowers the maximum speed, while rotating it outward in the direction of arrow β gradually increases the maximum speed. The rotation support structure of the grip 4b has a similar structure to that of a conventionally known grip for adjusting gears. The direction and amount of rotation of the grip 4b are detected by a sensor or switch mounted inside the grip 4b, and the detection signal is output to the control device 40. The control device 40 changes the maximum speed during self-propelled riding in response to the detection signal.

[0055] The control device 40 causes one or more of the mode notification devices 50, 51, 52, 53 configured as shown in Figures 1 to 5 to notify the user of the current maximum speed when self-propelled. When the manual switch 71 is turned on, the control device 40 causes the vehicle to enter either the push-walk mode or the self-propelled mode according to the set maximum speed.

[0056] 1 to 5, the current vehicle state is displayed and a visually identifiable notification is given from the outside, making it easier for people in the vicinity to determine the vehicle state after switching of the electrically assisted bicycle 1a. In this example, the other configurations and operations are the same as those in the configurations of FIGS. 1 to 5.

[0057] In the above configurations, the current vehicle status is indicated by a visually identifiable notification of the current maximum speed. In another configuration, the vehicle status of the electrically power-assisted bicycle may be changed by changing the maximum output of the motor 21, the size of the electrically power-assisted bicycle, or the setting of the operation method in the self-propelled mode, in which self-propelled mode is executable. A notification unit having a configuration similar to one or more of the mode notification devices 50, 51, 52, and 53 may be configured to notify the current maximum output of the motor 21, the size of the electrically power-assisted bicycle, or the setting of the operation method in the self-propelled mode. For example, in the configuration shown in FIG. 10 in which the maximum speed setting for self-propelled mode is changed by rotating the grip 4b, the maximum output of the motor 21 may be changed by rotating the grip 4b. Alternatively, the lateral length of the handlebars, which defines the lateral width of the vehicle, may be changed. In this case, the change in the lateral length of the handlebars may be detected by a switch or sensor, and a detection signal may be output to a control device, which may then cause the notification unit to notify the current vehicle size. The setting state of the operation method in the self-propelled mode may be switchable between, for example, a first mode in which self-propelled operation can be switched between execution and stop by turning a push switch on / off, and a second mode in which self-propelled operation can be accelerated or decelerated by changing the rotation direction of the accelerator throttle. Also, two or more different notification units may be configured to provide notifications indicating two or more of the current maximum speed during self-propelled operation, the maximum output of the motor 21, the size of the vehicle, the feasibility of assisted driving or self-propelled operation, and the setting state of the operation method in the self-propelled mode.

[0058] FIG. 11 is a perspective view showing an electric kick scooter 80, which is another example of a self-propelled vehicle according to an embodiment. In the electric kick scooter 80, a front wheel 81 and a rear wheel 82 are rotatably supported on a body 83 having a tread portion. A cylindrical portion 84 is fixed to the front of the body 83, and a handle shaft 85 is rotatably inserted into the cylindrical portion 84. A front fork 86 that supports the front wheel 81 is fixed to the lower end of the handle shaft 85. A handle 87 is fixed to the upper end of the handle shaft 85. This makes it possible to steer the front wheel 81 with the handle 87. A case 83a is provided below the body 83, and contains an electric motor and a battery that supplies power to the electric motor. A power switch (not shown) and a speed changer (not shown) for changing the maximum speed are provided on the handle 87. When the power switch is turned on and an acceleration command unit such as an accelerator lever (not shown) attached to one end of the handlebar 87 is operated, the electric motor is driven and the power is transmitted to the rear wheel 82, causing the electric kick scooter 80 to self-propel. The maximum speed can be switched between two or more speeds by operating the speed switch. A display unit 88 such as an LCD display is fixed to the handlebar shaft 85, and the display unit 88 displays the current maximum speed as a notification to the outside. The notification of the maximum speed is not limited to a numerical display, and may be a text display, a graphic display, or the like. A display unit similar to the display unit 51 of the power-assisted bicycle 1 shown in Figures 1 to 4 is provided at the rear end of the electric kick scooter 80, and the display may display information about the vehicle status, such as the current final speed.

[0059] As with the above-mentioned electrically assisted bicycles 1 and 1a, the above-mentioned electric kick scooter 80 also makes it easier for people in the vicinity to determine the switched maximum speed of the electric kick scooter 80 when it is propelled by itself. This makes it easier for people in the vicinity to take action to avoid danger to the electric kick scooter 80, and also makes it easier for people in the vicinity to determine whether the electric kick scooter 80 is being used in an appropriate manner.

[0060] In addition to or instead of changing the maximum speed, the electric kick scooter 80 may be able to change one or both of the maximum output of the electric motor and the size of the electric kick scooter 80. The current state of one or both of the maximum output of the electric motor and the size of the electric kick scooter 80 may be displayed on the display unit 88. For example, to change the size of the electric kick scooter 80, the length of the body 83 in the front-to-rear direction may be changeable, or the length of the handlebars 87 in the width direction of the electric kick scooter 80, which defines the maximum width of the electric kick scooter 80, may be changeable.

[0061] The vehicle with self-propelled function disclosed herein may also be applied to vehicles with self-propelled function other than the above-mentioned electric assist bicycles 1, 1a and electric kick scooter 80, such as a ride-on mobility assistance vehicle that accelerates and decelerates by shifting the weight of the standing user forward and backward, or an electric wheelchair.

[0062] In addition, in the above examples of the self-propelled vehicle, the notification indicating the current vehicle state is made by a notification unit having a light source, a display unit, etc., which is visually identifiable from the outside. On the other hand, the notification indicating the current vehicle state may be made audibly by a notification sound generating unit, which is a notification unit such as a buzzer or a sound generating unit. [Explanation of symbols]

[0063] 1, 1a Electrically assisted bicycle, 2 Frame, 2a Head pipe, 2b Front fork, 2c Down pipe, 2d Seat pipe, 2e Chain stay, 2f Seat stay, 3a Front wheel, 3b Rear wheel, 4 Handlebar, 4a, 4b Grip, 5 Saddle, 6 Crank arm, 7 Pedal, 8 Chain, 9 Headlight, 10 Battery, 11 Stem, 12 Steering column, 13 Carrier, 20 Motor unit, 21 Motor, 30 Sensor switch group, 33 Pedal force sensor, 34 Vehicle speed sensor, 35 Crank rotation sensor, 36 Hand switch device, 36a Case, 37 Power switch, 38 Mode switching unit, 38a, 38b Speed ​​mode switch, 39 Manual switch, 40 Control device, 48 Mode switching unit, 50 First mode notification device, 51 Second mode notification device, 52 Third mode notification device, 53 Fourth mode notification device, 55 assist mode switch, 56 power off mode switch, 57 display unit, 60 brake lever device, 61 ring unit, 70 hand switch device, 71 manual switch, 72 lighting switch, 74 assist switching unit, 75 display unit, 80 electric kickboard, 88 display unit, 100 user, 101 thumb.

Claims

1. The handle and a motor unit having an electric motor; a mode switching unit provided on the handle; a control device that switches a vehicle state by operating the mode switching unit; a first notification unit provided on the steering wheel and configured to provide a notification indicating a current vehicle state that is visible from the outside; a manual switch provided on the handle; Equipped with the vehicle state includes a first self-propelled mode in which a maximum speed during self-propelled driving force of the electric motor is a first speed, and a second self-propelled mode in which a maximum speed during self-propelled driving force of the electric motor is a second speed different from the first speed, the first speed being higher than the second speed; the first notification unit has a first light source, and issues a first notification when the vehicle state is the first self-propelled mode, and issues a second notification different from the first notification when the vehicle state is the second self-propelled mode; the first light source is turned on in one of the first notification and the second notification, and the first light source is blinked in the other of the first notification and the second notification; The first self-propelled mode or the second self-propelled mode is executed in response to an operation of the manual switch, Grips are provided on one end and the other end of the handle, The mode switching unit and the manual switch are provided on the one end side of the handle. Self-propelled vehicle.

2. A frame having a head pipe and a steering column rotatably inserted into the head pipe; a steering wheel connected to the steering column; a motor unit having an electric motor; a mode switching unit provided on the handle; a control device that switches a vehicle state by operating the mode switching unit; a first notification unit that issues a notification indicating the current vehicle state that is visible from the outside; a manual switch provided on the handle; Equipped with the vehicle state includes a first self-propelled mode in which a maximum speed during self-propelled driving force of the electric motor is a first speed, and a second self-propelled mode in which a maximum speed during self-propelled driving force of the electric motor is a second speed different from the first speed, the first speed being higher than the second speed; the first notification unit has a first light source, and issues a first notification when the vehicle state is the first self-propelled mode, and issues a second notification different from the first notification when the vehicle state is the second self-propelled mode; the first light source is turned on in one of the first notification and the second notification, and the first light source is blinked in the other of the first notification and the second notification; The first self-propelled mode or the second self-propelled mode is executed in response to an operation of the manual switch, Grips are provided on one end and the other end of the handle, the mode switching unit and the manual switch are provided on the one end of the handle, the first notification unit rotates together with the steering column; Self-propelled vehicle.

3. A frame having a head pipe and a steering column rotatably inserted into the head pipe; a steering wheel connected to the steering column; a motor unit having an electric motor; a mode switching unit provided on the handle; a control device that switches a vehicle state by operating the mode switching unit; a first notification unit that issues a notification indicating the current vehicle state that is visible from the outside; a manual switch provided on the handle; Equipped with the vehicle state includes a first self-propelled mode in which a maximum speed during self-propelled driving force of the electric motor is a first speed, and a second self-propelled mode in which a maximum speed during self-propelled driving force of the electric motor is a second speed different from the first speed, the first speed being higher than the second speed; the first notification unit has a first light source, and issues a first notification when the vehicle state is the first self-propelled mode, and issues a second notification different from the first notification when the vehicle state is the second self-propelled mode; the first light source is turned on in one of the first notification and the second notification, and the first light source is blinked in the other of the first notification and the second notification; The first self-propelled mode or the second self-propelled mode is executed in response to an operation of the manual switch, Grips are provided on one end and the other end of the handle, the mode switching unit and the manual switch are provided on the one end of the handle, The first notification unit is provided forward of the steering column. Self-propelled vehicle.

4. The self-propelled vehicle according to any one of claims 1 to 3, The manual switch is provided closer to the other end than the grip on the one end side and closer to the one end than the grip on the other end side.

5. The self-propelled vehicle according to any one of claims 1 to 4, a second notification unit that has a second light source, turns on the second light source in one of the first notification and the second notification, and blinks the second light source in the other of the first notification and the second notification; The second notification unit is provided rearward of the first notification unit.

6. The self-propelled vehicle according to any one of claims 1 to 5, The manual switch is an accelerator throttle.

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