Vehicle headlight having a high beam unit and low beam unit generating a daytime running light mode with high beam unit

1. A vehicle headlight comprising:

a housing unit;

a low beam unit mounted to said housing unit and being controllable to produce a low beam;

a high beam unit mounted to said housing unit and being controllable to produce a high beam; and

a control module communicatively connected between said low beam unit and said high beam unit, and being operable to switch between

a high beam mode, in which said high beam unit is controlled to produce said high beam with a first level brightness, and

a daytime running mode, in which said high beam unit is controlled to produce said high beam with a second level brightness that is weaker than said first level brightness.

2. The vehicle headlight as claimed in claim 1 , wherein said housing unit includes a base seat, and a first adjustment unit that is mounted to said base seat, that is connected to said low beam unit, and that is operable to drive said low beam unit to pivot in an up-down direction and a left-right direction relative to said base seat.

3. The vehicle headlight as claimed in claim 2 , wherein:

said low beam unit includes a low beam mounting seat, a low beam reflector that is mounted to said low beam mounting seat, and that has a first reflective surface, and a first light-emitting member that is mounted to said low beam mounting seat, and that is configured to emit light toward said first reflective surface, said first reflective surface being configured to reflect said light to travel in a forward direction;

said base seat has a seat body, and two first insert rod portions that are spaced apart from each other in the left-right direction, that protrude in the forward direction from said seat body into said low beam mounting seat, and that are movable in the up-down direction and the left-right direction relative to said low beam mounting seat; and

said first adjustment unit includes three first adjustment bolts that are spaced apart from each other, that extend through said seat body, and that are threadedly engaged with said low beam mounting seat.

4. The vehicle headlight as claimed in claim 2 , further comprising a turn light unit that is mounted to said housing unit and that is controllable to produce a light beam, said turn light unit including a turn light reflector that is mounted to said base seat, and a light-emitting member that is mounted to said base seat, and that is exposed outwardly from said turn light reflector, said turn light reflector being configured to reflect said light to travel in the forward direction.

5. The vehicle headlight as claimed in claim 3 , wherein:

said base seat further has three first protruding portions that protrude in the forward direction from said seat body toward said low beam mounting seat, each of said first adjustment bolts extending rotatably through a respective one of said first protruding portions to be threadedly engaged with said low beam mounting seat; and

said first adjustment unit further includes three first washers, each of said first washers being sleeved on a respective one of said first adjustment bolts, and abutting elastically against and disposed between the respective one of said first protruding portions and said low beam mounting seat.

6. The vehicle headlight as claimed in claim 5 , wherein said housing unit further includes a second adjustment unit that is mounted to said base seat, that is connected to said high beam unit, and that is operable to drive said high beam unit to pivot in the up-down direction and the left-right direction relative to said base seat.

7. The vehicle headlight as claimed in claim 6 , wherein:

said high beam unit includes a high beam mounting seat, a high beam reflector that is mounted to said high beam mounting seat, and that has a second reflective surface, and a second light-emitting member that is mounted to said high beam mounting seat, and that is configured to emit light toward said second reflective surface, said second reflective surface being configured to reflect said light to travel in the forward direction;

said base seat has a seat body, and two second insert rod portions that are spaced apart from each other in the left-right direction, that protrude in the forward direction from said seat body into said high beam mounting seat, and that are movable in the up-down direction and the left-right direction relative to said high beam mounting seat; and

said second adjustment unit includes three second adjustment bolts that are spaced apart from each other, that extend through said seat body, and that are threadedly engaged with said high beam mounting seat.

8. The vehicle headlight as claimed in claim 6 , wherein said housing unit further includes:

a back member that is disposed behind said base seat; and

a light adjustment unit that is mounted to said back member, that is connected to said base seat, and that includes

two universal connecting members mounted to said back member, being spaced apart in the left-right direction, and rotatably connected to said base seat, and

a direction adjustment member extending through said back member in the forward direction to be threadedly engaged with said base seat, and being rotatable to pivot said base seat in the up-down direction relative to said back member via said universal connecting members.

9. The vehicle headlight as claimed in claim 7 , wherein:

said base seat further has three second protruding portions that protrude in the forward direction from said seat body toward said high beam mounting seat, each of said second adjustment bolts extending rotatably through a respective one of said second protruding portions to be threadedly engaged with said high beam mounting seat; and

said second adjustment unit further includes three second washers, each of said second washers being sleeved on a respective one of said second adjustment bolts, and abutting elastically against and disposed between the respective one of said second protruding portions and said high beam mounting seat.

10. The vehicle headlight as claimed in claim 1 , wherein said control module is further operable to switch to a positioning light mode, in which said high beam unit is controlled to produce said high beam with a third level brightness that is weaker than said second level brightness.