JPS63152504U - - Google Patents

Description

[Brief explanation of the drawing]

1 to 7 show a first embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a plan view, and FIG. 3 is a perspective view of the main parts of an incremental encoder. , Fig. 4 is a partially enlarged plan view of the main part, Fig. 5 is a diagram showing an example of the signal pulse waveform, Fig. 6 is a plan view showing the main part of the absolute type encoder, and Fig. 7 is a diagram showing the main part of the absolute type encoder. It is an output characteristic diagram. Further, FIGS. 8 and 9 are views corresponding to FIGS. 1 and 2, respectively, showing a second embodiment of the present invention. In the figure, 1 is a steering shaft, 2 is a base, 6 is a rotor, 8 is a coding plate (coding member), 8
a is a through hole, 14 is a photointerrupter (first signal generation means), 15 is an incremental encoder, 18 is an absolute encoder, 19 is a gear mechanism, 20 is an internal gear, 21 is a sun gear, 22 is a planetary gear, 23 is a deceleration rotating body, 24 is a composite substrate (second signal generation means), and 27 is a brush (
second signal generating means), 29 is a main body case, 30
is a rotor, 34 is a permanent magnet (encoding member), 37
38 is a magnetoresistive element (magnetic sensor, first signal generation means), 39 is an incremental encoder.
40 is an absolute type encoder, 40 is a composite substrate (second signal generating means), 43 is a gear mechanism, 44 is an internal gear, 45 is a sun gear, 46 is a planetary gear, 47 is a reduction rotor, 49 is a brush (second (signal generating means).

Claims (1)

[Claims for Utility Model Registration] 1. An encoding member that rotates integrally with the steering wheel, and the encoding member is provided to constitute an incremental encoder, and the amount of rotation of the steering wheel is determined in accordance with the rotation of the encoding member. a first signal generating means that generates a number of signal pulses corresponding to and second signal generating means for generating an analog signal indicating the amount of rotation of the steering wheel from a neutral position in accordance with the rotation of the decelerating rotor. . 2. The incremental encoder constituted by the encoding member and the first signal generating means is characterized in that it is configured to generate two types of signal pulses having different phases in accordance with the rotation of the encoding member. A rotation detection device for a steering wheel for an automobile according to claim 1 of the utility model registration claim. 3. Claim No. 3 of the utility model registration characterized in that the encoding member is constituted by an encoding plate having a plurality of through holes arranged in an annular manner, and the first signal generating means is constituted by a photointerrupter. The rotation detection device for an automobile steering wheel according to item 1. 4. The vehicle according to claim 1, wherein the encoding member is composed of a permanent magnet having a plurality of magnetic poles, and the first signal generating means is composed of a magnetic sensor. Steering wheel rotation detection device. 5. The gear mechanism includes a sun gear that rotates integrally with the steering wheel, an annular internal gear that is arranged concentrically around the sun gear and fixed to a stationary part as appropriate in the above arrangement, and a ring-shaped internal gear that rotates integrally with the steering wheel. Claim 1 of the utility model registration claim is characterized in that a planetary gear is provided between the gears so as to mesh with the gears, and the planetary gear is configured to transmit the revolving force of the planetary gear to a decelerating rotating body. The rotation detection device for an automobile steering wheel described above.