JPH02147345U

JPH02147345U -

Info

Publication number: JPH02147345U
Application number: JP5693189U
Authority: JP
Priority date: 1989-05-17
Filing date: 1989-05-17
Publication date: 1990-12-14
Anticipated expiration: 2004-05-17
Also published as: JPH0630564Y2

Description

[Brief explanation of drawings]

第１図乃至第７図は本考案の一実施例を示し、
第１図は要部の機械的構成を示す縦断面図、第２
図は主要部の配置を示す概略的斜視図、第３図は
磁気センサの構造を示す拡大斜視図、第４図は永
久磁石と磁気センサとの相対的な位置関係を示す
図、第５図ａ，ｂ，ｃは夫々磁気センサの出力特
性図、第６図は各磁気センサの出力を合成した合
成出力特性図、第７図は要部の電気的構成を示す
ブロツク図である。そして、第８図乃至第１２図
は従来例を示し、第８図は第１図相当図、第９図
は第４図相当図、第１０図は第９図の場合におけ
る磁気センサの出力特性図、第１１図は永久磁石
が傾いた状態の第９図相当図、第１２図は第１１
図の場合における磁気センサの出力特性図である
。図面中、１１はミラー本体、１１ａはミラー面
、１２はミラーハウジング、１５は駆動装置、１
６はモータ、１８は線状スプリング、１９はねじ
ロツド、１９ａはねじ溝、２０は自在継手、２１
は永久磁石（着磁部）、２３，２４，２５は夫々
ホール素子（磁気センサ）、２６は合成回路、２
８は記憶回路、２９は比較回路、３０は正逆駆動
回路を示す。 1 to 7 show an embodiment of the present invention,
Figure 1 is a vertical sectional view showing the mechanical configuration of the main parts, Figure 2
The figure is a schematic perspective view showing the arrangement of the main parts, Figure 3 is an enlarged perspective view showing the structure of the magnetic sensor, Figure 4 is a diagram showing the relative positional relationship between the permanent magnet and the magnetic sensor, and Figure 5 a, b, and c are output characteristic diagrams of the magnetic sensors, FIG. 6 is a composite output characteristic diagram in which the outputs of the respective magnetic sensors are combined, and FIG. 7 is a block diagram showing the electrical configuration of the main parts. 8 to 12 show conventional examples, FIG. 8 is a diagram equivalent to FIG. 1, FIG. 9 is a diagram equivalent to FIG. 4, and FIG. 10 is an output characteristic of the magnetic sensor in the case of FIG. 9. Figure 11 is a diagram corresponding to Figure 9 with the permanent magnet tilted, and Figure 12 is equivalent to Figure 11.
It is an output characteristic diagram of the magnetic sensor in the case shown in the figure. In the drawing, 11 is a mirror body, 11a is a mirror surface, 12 is a mirror housing, 15 is a drive device, 1
6 is a motor, 18 is a linear spring, 19 is a screw rod, 19a is a screw groove, 20 is a universal joint, 21
is a permanent magnet (magnetized part), 23, 24, 25 are Hall elements (magnetic sensors), 26 is a composite circuit, 2
Reference numeral 8 indicates a memory circuit, 29 a comparison circuit, and 30 a forward/reverse drive circuit.

Claims

[Scope of utility model registration request]

A mirror body rotatably provided with respect to the mirror housing, a screw rod whose one end is rotatably connected to the mirror body, a motor that is rotated in forward and reverse directions by remote control, and an outer circumference of the screw rod. and a linear spring provided to be rotated by the motor while being engaged with a thread groove, and the linear spring relatively spirally advances and retreats along the thread groove based on the rotation of the motor. In the motorized mirror for a vehicle, the screw rod is moved in the axial direction of the mirror body to rotate the mirror body, and the screw rod is provided with a magnetized part, and three or more magnetized parts are provided around the magnetized part. A mirror position detection device for an electric mirror for a vehicle, characterized in that magnetic sensors are arranged at equal intervals, and a combined output of these magnetic sensors is output as a position signal indicating the position of the mirror body.