JP3118245B2 - Bicycle speed display - Google Patents

Description

The present invention relates to a bicycle speed display device that detects a wheel rotation speed of a bicycle, calculates a traveling speed, and displays the calculated traveling speed.

(B) Conventional technology Conventionally, as shown in FIGS. 6 and 7, a speed display device of this type includes a magnet case 52 having a magnet 51 built therein.
And two grooves 54 for passing the spokes 53 of the bicycle wheel through the spokes 53.
The case 52 is covered with a lid 55, and is tightened by a fixing screw 56.
It was attached to. Then, a detecting means for detecting the detected means is provided on the frame on which the wheels are mounted, and the traveling speed is calculated based on the detection signal and the speed is displayed.

In general, the distance between the frame and the spokes varies depending on the bicycle model and the manufacturer, so if the mounting method is as described above, the distance between the detection means and the detection means is different, and the detection means is incorporated in the detection means. In many cases, the detection means cannot read the magnetism from the magnet, and not only there is an error in the traveling speed but also the traveling speed does not appear.

(C) Problems to be Solved by the Invention The present invention has been made in view of the above-mentioned drawbacks, and the type changes depending on a bicycle model, a maker, and the like, and accordingly, even if a distance between a frame for attaching wheels and a spoke changes. Another object of the present invention is to accurately measure the traveling speed.

(D) Means for Solving the Problems The present invention relates to a detection means attached to a spoke of a bicycle wheel, a detection means attached to a frame supporting the wheel, for detecting the detection means, and the detection means And a speedometer body incorporating a display unit for calculating and displaying the traveling speed based on the detection signal of the detecting means. A plurality of grooves having different depths are formed radially on the female screw, and the position of the detected means in the axle direction is adjusted by selectively fitting spokes into any of the grooves. The detection means is attached to the spoke.

(E) Function The detection means is attached to the frame supporting the bicycle wheel, and the detected means is attached to the spokes. The magnet in the detected means rotates with the rotation of the bicycle wheel, the detecting means detects the magnetism with the rotating magnet, receives the detection signal with the speedometer body, calculates the running speed, and displays the running speed on the display section I do.

When attaching the detected means to the spokes, even if the distance between the spoke and the frame to which the wheel is attached differs depending on the bicycle model and manufacturer, simply select the groove into which the spokes of the detected means are to be fitted. The distance can be adjusted and the detection means and the magnet can be mounted without making the distance too large or too small.

(F) Embodiment FIGS. 1 to 4 show an embodiment of the present invention, which will be described in detail below.

Reference numeral 1 denotes a detection means having a substantially cylindrical shape and a magnet 2 built in at the front end thereof. At the rear end of the detection means 1, a mounting portion 3 having a female screw at the center in the inside is formed. In FIG. 3, a plurality of grooves 4 and a shallow groove 5 deeper than the front end of the rear end are cut toward the front end in a state of intersecting radially around the female screw. Then, the deep groove 4 or the shallow groove 5 is inserted into the spoke 6 of the bicycle, and the male screw 7 is screwed into the female screw of the mounting portion 3 from the rear end so that the position of the detected means 1 in the axle direction is adjusted. It can be changed and fixed to the spoke 6.

8 has a built-in reed switch as shown in FIG.
Detection means attached to the frame 10 on which the wheels 9 are attached detects the magnetism of the magnet 2 built in the detection means 1 which rotates together with the wheels 9.

Reference numeral 11 denotes a speedometer main body which inputs a detection signal of the detection means 8 via a cable 12, calculates the signal, and displays a running speed of the bicycle on a built-in display unit 13. The speedometer main body 11 is attached to a handle 15 by a bracket 14.

For example, the detecting means 8 attached to the frame 10
When the gap between the detection means 1 and the spoke 6 is small, the detection means 1 is fixed by passing the deep groove 4 through the spoke 6 as shown in FIGS.

Further, when the distance between the detecting means 8 and the detected means 1 is large, as shown in FIGS.
Through the spokes 6 to fix the detection means 1.

As described above, by changing the mounting position of the detection target means 1 in the axle direction by the grooves 4 and 5, even if the distance between the frame 10 for mounting the wheels and the spoke 6 changes depending on the type of bicycle or the manufacturer, the detection means can be used. It can be mounted without the gap between the magnet 8 and the magnet 2 being too wide or too narrow.

(G) Effect of the Invention As described above, according to the present invention, the position of the detected means in the axle direction can be changed with a simple configuration, so that even if the type of bicycle changes and the interval between the frame and the spoke changes, it can be easily changed. It can be mounted at the optimum position, and the traveling speed can be measured accurately.

[Brief description of the drawings]

1 to 5 show an embodiment of the present invention. FIGS. 1 and 2 are side views of a detection target when a spoke is fixed in a deep groove. FIGS. 3 and 4 are spokes. FIG. 5 is a side view of the detection means in a case where is fixed to a shallow groove, FIG. 5 is an overall perspective view showing a state in which a speed display device is mounted on a bicycle, FIG. 6 and FIG. FIG. 7 is a side sectional view showing a state where the detected means is attached to the spoke, and FIG. 7 is a top sectional view of the detected means. 9 ... wheels, 1 ... means to be detected, 10 ... frame, 8 ...
Detecting means 13 Display part 11 Speedometer body 4 Deep groove 5 Shallow groove 19 Groove 21 Fixed nut

Continuation of the front page (56) References Japanese Utility Model Sho-59-92812 (JP, U) Japanese Utility Model Sho-58-28086 (JP, U) Japanese Utility Model Utility Model No. 3-72360 (JP, U) Japanese Utility Model Sho 60-38223 (JP) , Y2) Jikken Sho 61-13971 (JP, Y2) Jikken Sho 55-34148 (JP, Y2) Jigyo 35-1016 (JP, Y1) (58) Fields surveyed (Int. Cl. ⁷ , DB Name) B62J 39/00 G01P 3/487

Claims (1)

(57) [Claims] 1. A detecting means attached to a spoke of a wheel of a bicycle, a detecting means attached to a frame supporting the wheel to detect the detecting means, and a running speed is calculated based on a detection signal of the detecting means. And a speedometer main body having a built-in display unit for displaying and displaying, wherein the detected means is provided with a female screw from the tip thereof and a plurality of radially different depths around the female screw. A groove is formed, and the spoke is selectively fitted into one of the grooves to adjust the position of the detected means in the axle direction. Then, the detected means is attached to the spoke with a male screw screwed into the female screw. Bicycle speed display device.