JP3011443B2 - Bicycle data display device - Google Patents

Description

The present invention relates to a bicycle data display device that calculates and displays a bicycle speed and the like.

(B) Conventional technology Conventionally, a bicycle data display device of this type mounts a main body having a display section such as a speed on a handlebar of a bicycle, and detects a speed or the like based on an output of a rotation speed detecting means for detecting a rotation speed of a wheel. Is calculated and the speed and the like are displayed on the display section of the main body (see Japanese Utility Model Application Laid-Open No. 60-118713 (G01D 7/02)).

However, the conventional bicycle data display device main body is attached to the handle of the bicycle, so that the design of the bicycle is impaired, and the bicycle data display device must be attached and detached to prevent theft of the bicycle, but the attaching and detaching operation is troublesome. There were some disadvantages.

(C) Problems to be Solved by the Invention The present invention has been made in view of the above-mentioned drawbacks, and has as its object to provide a bicycle data display device that does not require the main body to be mounted on a bicycle handle.

(D) Means for Solving the Problems The present invention calculates a speed based on an output of a rotational speed detecting means for detecting a rotational speed of a wheel, and an output of the rotational speed detecting means,
Control for providing a main body to be displayed on a display unit and mounting means for detachably mounting the main body to an arm, and selecting a display on the display unit between a speed display and a time display based on an output of the rotation speed detecting means. A means is provided.

(E) Function According to the configuration of the present invention, the main body is worn on the wrist, and is used as a wristwatch when speed display is not necessary. When the bicycle is stopped in the speed display state, the control circuit automatically changes from the speed display to the time display.

(F) Embodiment One embodiment of the present invention will be described below in detail with reference to the drawings.

Reference numeral 1 denotes a detection target mounted on the front wheel B of the bicycle A, and has a magnet 2 built therein. Reference numeral 3 denotes a detection unit mounted on the front fork C of the bicycle A, which is located on the rotation locus of the detection unit 1 accompanying the rotation of the front wheel B. The detection unit 3 includes a reed switch 4 that opens and closes by the magnetic force of the magnet 2, a transmission circuit 6 that transmits an open / close signal of the reed switch 4 from an output antenna 5, a reed switch 4, and a battery 7 that supplies power to the transmission circuit. The detected part 1 and the detecting part 3
Constitutes a rotation speed detecting means.

Reference numeral 8 denotes an apparatus main body detachably attached to the driver's arm of the bicycle A by a belt 9, and a pair of receiving antennas 10 for receiving a radio signal transmitted from the detection unit 3, and a receiving signal of the receiving antenna 10 A receiving circuit 11 that outputs to a control circuit 13 to be described later, a control circuit 13 that calculates the traveling speed of the bicycle A based on an output signal of the receiving circuit 11, and displays the traveling speed on a liquid crystal display 12, a control circuit, and a liquid crystal display Battery for powering 11 etc.
14 built-in.

15 is a mode for selecting the display of the liquid crystal display 12 into a clock display mode for displaying time, a speed display mode for displaying speed, a mileage display mode for displaying mileage, and a section distance display mode for displaying section distance. The changeover switch 16 is a start / stop switch that supports start / end of the measurement of the section distance.

In the circuit diagram shown in FIG. 1, reference numeral 17 denotes a switch circuit for outputting operation signals of the mode changeover switch 15 and the start / stop switch 16 to a control circuit 13, and the control circuit 13 sets an input signal from the reception circuit 11 in advance. The speed, the traveling distance, and the section distance are calculated from the wheel diameter thus obtained, and the speed, the distance, and the like are displayed on the liquid crystal display 12 based on the input signal from the switch circuit 17. 18 is the control circuit
The control circuit 13 executes a control operation step by step and counts time based on the operation cycle clock supplied from the crystal oscillation circuit 18. ing.

Next, the operation will be described with reference to the flowcharts shown in FIGS. 2 (a) and 2 (b).

When a power switch (not shown) is operated, the time counted by the control circuit 13 in step S1 is displayed on the liquid crystal display 12, and this time display mode is continued until the mode switch 15 is operated in step S2.

When displaying the bicycle speed, use the mode switch
By operating 15, the process moves from step S2 to step S3.

When the bicycle is run, the detected portion 1 rotates with the rotation of the wheel B, and the reed switch 4 of the detecting portion 3 opens and closes,
The signal is transmitted from the transmitting antenna 5 to the main body 8. The signal transmitted from the transmitting antenna 5 is received by the receiving antenna 10, and the speed is calculated based on the received signal and a preset wheel diameter (step S3).
The speed calculated in S3 is displayed on the liquid crystal display unit 12 in step S4.

In step S5, it is determined whether or not the mode switch 15 has been operated, and if not, the process proceeds to step S6 to determine whether or not the bicycle A has stopped.

If the bicycle A is stopped in step S6, the process proceeds to step S7, and a timer for a predetermined time is set to 30 in this embodiment.
A second timer is set, the speed is displayed until 30 seconds have elapsed, and when 30 seconds have elapsed, the flow shifts to step S1 to enter the time display mode (step S8).

If the bicycle is in the running state in step S6, even if the vehicle starts running during the 30-second timer count,
The process proceeds to S9 to reset the timer, and then proceeds to step S3.

When the mode changeover switch 14 is operated in step S5, the process proceeds to step S10, where a timer for a predetermined time, in this embodiment, a timer for 4 seconds is set, and the mileage display mode is set. The information is continuously displayed on the liquid crystal display 12 until the changeover switch 14 is operated (Step S11, Step S12, Step S13).

In this mileage display mode, after 4 seconds,
The process proceeds to step S14 to determine whether or not the bicycle is stopped. If the bicycle is stopped, the process proceeds to step S1 to enter the time display mode. If the bicycle is running, the flow shifts to step S3 to enter the speed display mode.

When the mode changeover switch 15 is operated in step S13, the process proceeds to step S15, and a timer for a predetermined time, in this embodiment, a timer for 4 seconds is set to be in the mileage display mode. The information is continuously displayed on the liquid crystal display 12 until the changeover switch 15 is operated (step S16, step S17, step S18).

In this mileage display mode, after 4 seconds,
The process proceeds to step S19 to determine whether or not the bicycle is stopped. If the bicycle is stopped, the process proceeds to step S1 to enter the time display mode. If the bicycle is running, the flow shifts to step S3 to enter the speed display mode.

(G) Effect of the Invention As described above, according to the present invention, when the bicycle is stopped in the speed display state, the control circuit automatically changes the display from the speed display to the time display. When stopped, the time can be checked, and usability can be improved. Further, since the main body is mounted on the arm, it can be used with a wristwatch when the speed display is not required.

[Brief description of the drawings]

1 is a circuit diagram, FIGS. 2 (a) and 2 (b) are flowcharts, FIG. 3 is a front view of a main body, and FIG. 4 is a side view of the main body. FIG. 5 is a diagram showing the state of attachment of the rotation speed detecting means. 1 ... detected part, 3 ... rotation number detecting part, 8 ... body, 9
... belt (attachment means), 12 ... liquid crystal display (display), 13 ... control circuit.

Claims (1)

(57) [Claims] A rotational speed detecting means for detecting a rotational speed of a wheel; and a speed calculated based on an output of the rotational speed detecting means.
Control for providing a main body to be displayed on a display unit and mounting means for detachably mounting the main body to an arm, and selecting a display on the display unit between a speed display and a time display based on an output of the rotation speed detecting means. A bicycle data display device comprising means.