JP4180305B2 - Bicycle speedometer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bicycle speedometer configured to take a part of an output from a generator driven by rotation of a wheel as a speed signal and control power.
[0002]
[Prior art]
There is a bicycle speedometer for detecting and displaying the traveling speed of the bicycle. Conventionally, as a bicycle speedometer, a mechanical pointer type analog type that combines a flexible wire with a gear unit that detects the rotation speed in association with the spokes of the wheel, and a means for detecting the rotation speed of the wheel, By attaching a magnet to the rotating wheel and attaching and fixing a reed switch or a sensor such as a hall element to the stationary side of the chain stay, etc., a pulse generated when the magnet and the reed switch come close each time the wheel rotates In some digital types, the wheel rotation speed, that is, the traveling speed, is calculated from the number of pulses per unit time and displayed on a speedometer.
[0003]
[Problems to be solved by the invention]
In such a speedometer, the former mechanical analog type has a large number of parts and tends to have a high frequency of failure, and a high accuracy is required for the interval between the parts. Even in the latter digital type, the power source of the speedometer is a battery or a combination of a battery and a solar battery. However, in such a conventional type, the visibility of the digital display is high. It was scarce and depended only on the battery for the power supply, and consumption was severe. In addition, speed detection accuracy and responsiveness were insufficient with magnets. For this reason, the applicant of the present invention is a bicycle equipped with a generator that generates electric power by utilizing the rotation of a wheel, and includes a generator, a rectifier, a waveform shaping circuit, an arithmetic control unit, and a display unit. A bicycle speedometer was proposed (Japanese Patent Application Laid-Open No. 6-18537). This realized a high-precision, easy-to-read bicycle speedometer with few failures.
[0004]
Therefore, the present invention further improves the speedometer for bicycles proposed by the applicant of the present invention, making it possible to grasp the speed display more clearly and brightly even with a color sensation, and to display a multifunction display on the display. An object of the present invention is to provide a bicycle speedometer that enables the speed signal to be taken out stably.
[0005]
[Means for Solving the Problems]
Therefore, the present invention provides a bicycle speedometer configured to take a part of the output from the generator driven by the rotation of the wheel as a speed signal and control power, and display a part of the control power on the speedometer. It is configured to be used as part lighting, and a plurality of light emitters of different colors are disposed as light for the display part of the speedometer, and by controlling the lighting time of this light emitter according to the speed, The illumination color of the display unit of the speedometer is configured to change according to the speed . The present invention is characterized in that the energy consumption of the passenger estimated from the speed calculated based on the output from the generator is switched and displayed on the display unit of the speedometer. Further, in the present invention, when the output from the generator is waveform-shaped and input as a speed signal to the arithmetic control unit, one or several pulses are extracted per one rotation of the wheel by dividing by a predetermined frequency dividing ratio. It is characterized by comprising.
[0006]
With such a solution, the output from the generator driven by the rotation of the wheel is taken out and used for lighting such as a backlight, so that the speed display can be made clearer, brighter and easier to see, and depending on the speed. By changing the color of the backlight and other lighting, it is possible to grasp the speed even in the sense of color. In particular, it is more advantageous if a hub dynamo having light power generation performance is employed. In addition, the multi-function display can be used to greatly contribute to maintaining the health of the passengers, and various data can be displayed with high accuracy through stable extraction of speed signals without picking up extra signals. Become.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a bicycle speedometer according to the present invention will be described below in detail with reference to the drawings. 1 to 7 show an embodiment of a bicycle speedometer according to the present invention. FIG. 1 is an overall block diagram of the bicycle speedometer, and FIG. 2 (A) is a bicycle equipped with a bicycle speedometer. 3 is a circuit diagram of a bicycle speedometer corresponding to FIG. 1, FIG. 4 is an explanatory diagram showing an example of lighting control of lighting such as a backlight, and FIG. 5 is a relationship diagram of speed and energy consumption, FIG. 6 is an explanatory diagram of the speedometer unit, and FIG. 7 is a diagram showing a display example of the speedometer unit using liquid crystal or the like. As shown in FIG. 1, the basic configuration of the present invention is a bicycle speedometer configured to incorporate a part of an output from a generator 1 driven by the rotation of a wheel as a speed signal and control power. A part of the control power is used as illumination (backlight LED1, LED2, etc.) 11 of the display unit 9 of the speedometer.
[0008]
This will be described in detail below. The bicycle speedometer of the present invention is preferably combined with a hub dynamo type generator, which is less burdensome when generating power due to passenger pedaling, but does not exclude the conventional combination with a rim generator or the like. Absent. As shown in FIG. 2, an output cable 14 for sending output from the hub dynamo generator 1 disposed in the front wheel hub portion includes a headlamp 3 attached to the front wheel hawk and a speedometer attached to the handle. The bicycle speedometer of the present invention is configured by being connected to the section 2. FIG. 1 shows a bicycle speedometer as an overall block diagram, in which an output cable 14 from a generator 1 is branched and connected to a headlight 3 and a speedometer 2 surrounded by a one-dot chain line. Clearly understood.
[0009]
In FIG. 1, a part of the output from the generator 1 driven by the rotation of the wheel is supplied to the speedometer unit 2 as the power of the headlamp 3. Normally, the headlamp 3 is turned on by detecting the night, but its control circuit will not be described in detail. The remainder of the output used for lighting the headlamp 3 is introduced into the speedometer unit 2 as a speed signal and control power. The output waveform of the generator 1 is shaped into a pulse waveform by the waveform shaping unit 5 and divided by a predetermined dividing ratio by the frequency dividing unit 6 to extract one or several pulses per one rotation of the wheel and speed. This signal is input to the microcomputer 7 constituting the arithmetic control unit. The speed, integrated distance, and energy consumption (calorie) information processed by the microcomputer 7 are displayed on the liquid crystal display unit 9 and can be notified as audio information through a speaker or the like as appropriate.
[0010]
The control power introduced into the speedometer unit 2 is rectified by the power supply circuit unit 4 and used to turn on the LEDs 1 and 2 that generate a plurality of different colors that function as a backlight of the liquid crystal display unit 9. The microcomputer 7 is connected to a selection switch 12 for selecting a multi-function display in the liquid crystal display unit 9. A reset switch 13 for resetting information on the liquid crystal display unit 9 is also connected. By turning on the reset switch 13, all the numbers on the liquid crystal display unit 9 become 0, but it is also possible to configure so that only the integrated distance information is not reset. In addition, the numerical information in the liquid crystal display unit 9 uses the replaceable battery 10 as a power source, but a secondary battery that stores a part of the power of the generator 1 is installed, and this is used as the numerical information in the liquid crystal display unit 9. It may be a power source.
[0011]
FIG. 3 is a circuit diagram of a bicycle speedometer corresponding to FIG. 1. Electric power from the hub dynamo 1 as a generator is half-wave rectified by a diode D1, and a smoothing capacitor C1, a transistor Tr1, a Zener diode D3, a capacitor A constant voltage circuit composed of C2 and resistor R4 serves as a power supply circuit 4, and is supplied as a power source for lighting the two light emitting diodes LED1 and LED2 on the right side of the drawing. At the same time, in this embodiment, since the 28-pin hub dynamo 1 is used, the power of the hub dynamo 1 is half-wave rectified by the diode D2, and the transistor Tr2 is turned on / off according to the generated waveform, so that one wheel rotation The signal extraction unit 15 generates 14 pulses. This is waveform-shaped by a Schmitt inverter, divided by 7 by the binary counter of the next stage, diodes D6, 7, 8, resistor R5, Schmitt inverter, and further divided by 2 by the binary counter of the next stage, for a total of 14 The frequency divider 6 is configured as follows. As a result, one pulse is generated for each rotation of the wheel. This is sent to the microcomputer 7 as a speed signal.
[0012]
FIG. 4 is a time table of an example of lighting control of illumination such as a backlight. A plurality of (two in the illustrated example) light-emitting diodes LED1 (for example, green) and LED2 (for example, red) that are lit in different colors depending on the speed. ) Is controlled by PWM individually. The time is plotted on the horizontal axis. The frequency-divided pulses at the bottom of the drawing become dense with time, indicating that the speed of the bicycle is gradually increasing. The green light emitting diode LED1 repeats blinking with a relatively long lighting time until time T2. From time T2 to T4, the green light emitting diode LED1 blinks so that the lighting time is gradually shortened, and the green lighting disappears at time T4. On the other hand, the red light-emitting diode LED2 does not light up until time T1, but from time T1 to T3, the red light-emitting diode LED2 blinks so that the lighting time of the red light-emitting diode LED2 gradually increases, and the red light-up continues at time T3. That is, as the speed increases from time T1 to time T4, the speed can be grasped with a color sensation by decreasing the green color and increasing the red color.
[0013]
FIG. 5 is a relationship diagram between the speed and energy consumption estimated from the bicycle speed based on the speed of the bicycle, and a general formula based on the relationship (plot) between the speed and energy consumption of each individual passenger. (Solid line) is derived. Based on the relationship by the general formula, the energy consumption of the passenger is estimated from the speed signal from the dynamo 1, and the calorie consumption is switched and displayed on the liquid crystal display unit 9 on the display unit of the speedometer.
[0014]
FIG. 6 is an explanatory diagram of the speedometer unit, and FIG. 7 is a diagram showing a display example of the speedometer unit using liquid crystal or the like. 6A and 6B are a front view and a side view of the speedometer unit 2 installed in the center portion of the handle bar. As shown in FIG. 6A, a liquid crystal display unit 9 is disposed in front of the front side. A display selection switch 12 is disposed below the liquid crystal display unit 9. 6 (C) and 6 (D) are an internal front view and an internal side view of the partially transparent speedometer unit 2, and the state of attachment to the handlebar is understood. In addition, as shown in the internal side view of FIG. 6C, a replacement battery 10 for power supply of the number display unit in the liquid crystal display unit 9 is accommodated in the head of the speedometer unit 2. 6E and 6F are a plan view and a bottom view of the speedometer unit 2, respectively.
[0015]
FIG. 7 shows a display example of a display unit (preferably a liquid crystal display is adopted, but other appropriate display means can also be adopted). FIG. 7A shows an initial state in which all display elements are lit. FIG. 7B shows a bicycle speed of 35 km / h and the current time 12:06. By selectively pressing the display selection switch 12 in FIG. 6, instead of the time in FIG. 7C, the current calorie consumption of the passenger 274.9 kcal derived from the relational expression in FIG. Is displayed. Similarly, when the display selection switch 12 is selectively pressed, the travel distance 836.1 km from the time of setting (corresponding to a trip meter) is replaced with the time in FIG. 7D, and the total travel distance in FIG. 7E. 3269.0 km is displayed.
[0016]
The embodiment of the present invention has been described above. Within the scope of the present invention, the shape, type (preferably hub dynamo) and arrangement position of the generator, and the processing mode of the speed signal of the generator output are described. (Waveform shaping form, frequency division ratio, etc.), control power use form, display form illumination form (preferably a light emitting diode is used, but suitable illumination form as a backlight, EL, etc. Control mode of color change of the illumination of the display unit (depending on the speed, the lighting time of the emission color of different light emitters is controlled separately to change the color of the illumination of the display unit as a whole In addition, the number of light emitting diode groups of a predetermined combination may be increased or decreased according to the speed), the estimated form of energy consumption (passenger body shape, conditions such as uphill, downhill, bad road, etc.) Can also be configured to display corrected ) For the like can be employed as appropriate.
[0017]
【The invention's effect】
As described above in detail, according to the present invention, in the bicycle speedometer configured to take a part of the output from the generator driven by the rotation of the wheel as a speed signal and control power, the control together configured to utilize a portion of the power as the illumination of the display unit of speedometer, arranging a plurality of light emitters different colors as lighting of the display portion of the speedometer, the luminous body according to the speed By controlling the lighting time of the speedometer, the illumination color of the display part of the speedometer is changed according to the speed, so that the output from the generator driven by the rotation of the wheel is taken out and the back By using it for lighting such as lights, the speed display can be made clearer, brighter and easier to see. In addition, with abundant energy from the power supplied from the generator, a bright and clear display color can be obtained by preparing multiple light emitters of different colors such as a minimum number of backlights. Can be changed smoothly, and the speed can be grasped even by color sense.
[0018]
Also, if you configured to switched the display of the column multiplication's energy consumption the speedometer estimated from the calculated velocity based on the output from the previous SL onset Electric, enables multi-function display on the display This will greatly contribute to maintaining the health of the passengers.
[0019]
Furthermore, when the output from the generator is waveform-shaped and input as a speed signal to the calculation control unit, one or several pulses are extracted per one rotation of the wheel by dividing by a predetermined dividing ratio. In this case, it is possible to display various data with high accuracy by extracting the speed signal stably without picking up an extra signal.
Thus, it is possible to grasp the speed display more clearly and brightly, even with a color sensation, to enable multi-function display on the display, and to provide a bicycle speedometer that can stably extract the speed signal. .
[Brief description of the drawings]
FIG. 1 shows an embodiment of a bicycle speedometer according to the present invention, and is an overall block diagram.
FIG. 2 is an overall side view of a bicycle equipped with a bicycle speedometer.
3 is a circuit example diagram of a bicycle speedometer corresponding to FIG. 1; FIG.
FIG. 4 is an explanatory diagram showing an example of lighting control of illumination such as a backlight.
FIG. 5 is a diagram showing the relationship between speed and energy consumption.
FIG. 6 is an explanatory diagram of a speedometer unit.
FIG. 7 is a diagram showing a display example of a speedometer unit using liquid crystal or the like.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Generator 2 Speedometer part 3 Headlamp 4 Power supply circuit part 5 Waveform shaping part 6 Dividing part 7 Microcomputer (calculation control part)
8 Speaker 9 Liquid crystal display unit 10 Battery (for number display)
11 Backlight (LED)
12 Display selection switch 13 Reset switch 14 Output cable 15 Signal mounting part

Claims (3)

In a bicycle speedometer configured to take a part of output from a generator driven by wheel rotation as a speed signal and control power, a part of the control power is used as illumination of a display unit of the speedometer. The display unit of the speedometer is configured by arranging a plurality of light emitters of different colors as illumination of the display unit of the speedometer and controlling the lighting time of the light emitter according to the speed. A speedometer for bicycles, which is configured to change the color of lighting according to the speed. Bicycle according to claim 1, characterized by being configured towers ride's energy consumption which is estimated from the calculated velocity based on the output from the generator so that to switching display on the display unit of speedometer Speedometer. When the output from the generator is waveform-shaped and input as a speed signal to the arithmetic control unit, it is configured to extract one or several pulses per one rotation of the wheel by dividing by a predetermined dividing ratio. The speedometer for a bicycle according to claim 1 or 2, wherein the speedometer is for a bicycle.

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