JPS6231320Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a retractable headlamp.

In a retractable headlamp in which the headlamp is stored inside the vehicle body when the headlamp is not in use, such as during the day, when a motor is used as the drive source for operating the headlamp, the rotational force of the motor remains even when the power to the motor is turned off. Due to the inertia of the headlamp, it does not stop immediately, and the stopping position changes depending on the voltage change, so the optical axis of the headlamp is unstable. Therefore, conventionally, a drive link mechanism is provided in two stages. In order to reduce the error, or by installing a separate optical axis adjustment device, the optical axis can be adjusted using an adjustment screw or the like each time the headlamp is rotated, but in the former case, it is difficult to completely eliminate the error. In addition, in the latter case, not only is it troublesome to have to adjust the optical axis each time, but both have complicated structures.
Another problem was that it required space for installation.

The present invention has been made in order to solve the above-mentioned conventional problems, and in a drive device in which a motor is used as a drive source for operating a headlamp, the stopping position of the motor can be changed due to changes in the inertia of the motor's rotational force and voltage. It is an object of the present invention to provide a retractable headlamp driving device that can stabilize the optical axis regardless of errors.

The present invention will be described below with reference to illustrative embodiments.

Reference numeral 11 denotes a headlamp, which is attached to the front end of a support lever 14 rotatably supported on a support shaft 13 fixed at a mounting position in front of the vehicle body 12. One end of a spring 15 is attached near the rear end of the support lever 14 to bias the headlamp 11 so that it is always stored within the vehicle body 12. The other end of the spring 15 is attached to the vehicle body 12. Incidentally, the mounting position of the spring 15 is not limited as long as it is a position that biases the headlamp 11 in the direction of retracting it into the vehicle body 12.

The rear end of the support lever 14 is rotatably connected via a link 20 to a rotating body 19 coaxially connected to a worm gear 17 and a driven gear 18 that rotates in mesh with the worm gear 17 by a motor 16. Link 20 of the support lever 14
The distance L ₁ between the pivot joint 21 and the support shaft 13 is,
The distance between the support shaft 13 and the rotation center 22 of the rotation body 19 is set equal to L ₂ so that the pivot portion 21 is located at the rotation center of the rotation body 19 . That is, the rotating body 1
The rotation center 22 of 9 is the link 2 of the support lever 14.
Pivot joint portion 21 with 0 is provided on the circumference.

Further, the distance between the pivoting part 21 of the link 20 to the support lever 14 and the pivoting part 23 to the rotating body 19 is the distance between the rotation center 22 of the rotating body 19 and the rotating body 1 of the link 20.
9 and the pivot portion 23.

At the top of the headlamp 11, the vehicle body 12 is attached when closed.
headlamp cover 2 forming part of the outer surface of the headlamp cover 2;
4 is provided.

Now, when the headlamp 11 is stored, the rotating body 19 and the pivot joint 23 of the link 20 are at the position of point A shown in FIG. 19
rotates in the X direction, and with this rotation, the rear end of the support lever 14 is rotated in the direction of the center of rotation of the rotor 19 by the link 20 connecting the rotor 19 and the support lever 14, and the headlamp 11 is exposed. When the pivot joint 23 between the rotating body 19 and the link 20 reaches the position B, the pivot joint 23 between the support lever 14 and the link 20
1 coincides with the rotation center 22 of the rotating body 19, and the rotating body 19 and the link form a concentric circle.At this point, the headlamp 11 reaches a position pointing to a predetermined optical axis, and even if the rotating body 19 rotates, the support lever does not move. 14 is always biased in the Y direction by the spring 15, the support lever 14 stops rotating, and the link 20
only rotates. This state continues until the link 20 reaches the position of point C shown in FIG. Above link 2
When 0 exceeds point C, the support lever 14 is biased in the Y direction by the action of the spring 15.
The support lever 14 rotates in the opposite direction to the above, and the headlamp 11 is retracted into the vehicle body 12.

Incidentally, the rotating body is not limited to a disc-shaped one as in the above embodiment, but may be anything that rotates like a crank.Also, it is possible to eliminate the rotating body and connect a link to the driven gear. good.

As described above, according to the present invention, the support lever of the headlamp and the pivot point of the link are arranged so as to be located at the center of rotation of the rotating body, and the headlamp is biased in the retracting direction by the spring. Even when the rotating body rotates, there is a part where the headlamp does not operate. Therefore, if the motor is stopped within this range, the optical axis of the headlamp will be directed in the specified direction regardless of the error in the stopping position of the motor. It can be stabilized.

Further, according to the present invention, since the headlamp drive device also serves as the optical axis adjustment mechanism, there is no need to provide a separate optical axis adjustment mechanism.Furthermore, since the support lever is attached to move together with the headlamp, the component parts can be It is small in number and has a simple structure, and by making the radius of the rotating body substantially the same as the length of the link, it has the advantage of being able to be made smaller and lighter.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the headlamp driven by the headlamp drive device according to the present invention when it is retracted, Fig. 2 is a rear view of the same as above, and Fig. 3 is an enlarged side view of the main parts showing the operating state of the support lever. be. 11 is a head lamp, 13 is a support shaft, 14 is a support lever, 15 is a spring, 16 is a motor, 19
is a rotating body, and 20 is a link.

Claims (1)

[Scope of utility model registration request] A retractable headlamp drive device characterized in that a support lever having a headlamp attached to its front end and urged by a spring in the direction of storing the headlamp within the vehicle body is rotatably supported on a support shaft fixed to the vehicle body, one end of a link is rotatably attached to the rear end of the support lever and the other end is rotatably attached to a rotating body rotated by a motor, the center of rotation of the rotating body is located on the circumference described by the rear end of the support lever, and the distance between the pivotal attachment part of the link to the support lever and the pivotal attachment part of the link to the rotating body is equal to the distance between the center of rotation of the rotating body and the pivotal attachment part of the link to the rotating body.