Vehicular headlamp

Patent metadata

Field	Value
Publication number	US-9470387-B2
Application number	US-201314031480-A
Country	US
Kind code	B2
Filing date	Sep 19, 2013
Priority date	Oct 1, 2012
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

Provided is a vehicular headlamp including a lamp casing configured by a lamp housing having an opening at least at one side thereof and a cover that covers the opening of the lamp housing, and a lamp unit disposed within the lamp casing. The lamp unit includes: a light source unit having a light source; a movable shade configured to be rotatable and change the shielding quantity of light; a solenoid having an output shaft which moves in a left-and-right direction and configured to rotate the movable shade; a rotation shaft configured to function as a rotation fulcrum of the movable shade, the axial direction of the shaft corresponding to the left and right direction; and an orthogonal transformation mechanism configured to convert a movement action of the output shaft to a rotation movement of the movable shade.

First claim

What is claimed is:

1. A vehicular headlamp comprising:
a lamp casing configured by a lamp housing having an opening at least at one side thereof and a cover that covers the opening of the lamp housing; and
a lamp unit disposed within the casing,
wherein the lamp unit includes:
a light source unit which has a light source;
a movable shade configured to be rotatable and change a shielding quantity of light emitted from the light source;
a solenoid having an output shaft moving in a left and right direction and configured to rotate the movable shade;
a rotation shaft configured to function as a rotation fulcrum of the movable shade, an axial direction of the rotation shaft corresponding to the left and right direction; and
an orthogonal transformation mechanism configured to convert a movement action of the output shaft to a rotation action of the movable shade,

at least a portion of the rotation shaft for the movable shade is positioned at an upper side of the solenoid,
wherein the orthogonal transformation mechanism includes:
a rotation link which is rotated according to a movement of the output shaft;
a first connecting pin configured to connect the output shaft and the rotation link; and
a second connecting pin configured to connect the movable shade and the rotation link,

wherein the first connecting pin is inserted into the output shaft and the rotation link so that the output shaft and the rotation link are connected with each other, and
the second connecting pin is inserted into the movable shade and the rotation link so that the movable shade and the rotation link are connected with each other.

2. The vehicular headlamp of claim 1 , further comprising a support plate configured to support the rotation shaft,
wherein the solenoid is provided with a yoke case, and the support plate is attached to the yoke case.

3. The vehicular headlamp of claim 2 , wherein a top surface portion and a bottom surface portion of the yoke case are provided as attachment surface portions, respectively, to which the support plate is selectively attached.

4. The vehicular headlamp of claim 1 , further comprising a support plate configured to support the rotation shaft,
wherein the solenoid is provided with a yoke case, and the support plate is integrally formed with the yoke case.

5. The vehicular headlamp of claim 1 , wherein, within a rotation range of the rotation link, the second connecting pin is positioned between a rotation fulcrum of the rotation link and the first connecting pin.

Assignees

• Koito Mfg Co Ltd

Inventors

• Yokoi Shoichiro
• Mikuni Satoru

Classifications

• F21S41/698 Primary

  Shaft-shaped screens rotating along its longitudinal axis · CPC title

• F21S48/1794 Primary

  Mechanical Engineering · mapped topic

• F21S48/1778

  Mechanical Engineering · mapped topic

• F21S41/689 Primary

  Flaps, i.e. screens pivoting around one of their edges · CPC title