Patent Application
20070151408
The present invention relates to an electric control mechanism which uses change of resistance of a variable resistance to detect the position of vehicle light unit.
A conventional control mechanism for controlling head light unit of vehicles is shown in
The present invention intends to provide an electric control mechanism which has a variable resistance which changes the resistance when the head light is moved so that the control circuit detects the exact position of the head light unit by the value of the resistance. In other words, the electric control mechanism is able to automatically adjust the head light unit according to the resistance of the variable resistance.
The present invention relates to an electric control mechanism for light unit, the electric control mechanism comprises a motor received in a motor case and a driving member is fixed to an output shaft of the motor. An adjust rod is connected to the driving member which drives the adjust rod to move linearly. A cap is mounted to the motor case and the adjust rod movably extends through a passage of the cap. A variable resistance has a slide member which is connected to the adjust rod.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
Referring to FIGS. 2 to 5, the electric control mechanism “A” for light unit of the present invention comprises a motor 1 having an output shaft 11 and the motor 1 is received in a motor case 4. A driving member 12 is fixed to the output shaft 11 and includes a threaded hole 21. An adjust rod 2 has a flange 23 at a first end thereof and a sphere 22 is connected to a second end thereof. A threaded hole 21 is defined axially in the first end of the adjust rod 2. The driving member 12 includes an outer threaded section 121 which is threadedly engaged with the threaded hole 21.
A cap 3 is mounted to the motor case 4 and includes two second holes 33 which are in alignment with second holes 42 defined through the motor case 4 so that connection members such as bolts may extend through the first and second holes 33, 42 to connect the motor case 4 and the cap 3 together. The motor case 4 further includes a plurality of connection hooks 41 which are hooked to a periphery of the cap 3. The adjust rod 2 movably extends through a passage 31 of the cap 3 and a light unit (not shown) is pivotably connected to the sphere 22.
A variable resistance 5 is engaged with a guide path 32 on the cap 3 and has a slide member 51 which is engaged with an engaging recess 24 defined in an outer periphery of the adjust rod 2.
Referring to
The control circuit can be cooperated with other control functions by setting different resistance values for different situations so that the user may set the light unit to a specific operation mode by comparing the current resistance value and the pre-set resistance value and accordingly move the adjust rod 2.
While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
