Vehicle frame and stroller

A stroller comprising:

• a texture carrier;
• a wheel set comprising a front wheel and a rear wheel;
• and
• a vehicle frame adapted to hold the texture carrier, the vehicle frame comprising:
• a first bar, a bottom end of the first bar being connected with the front wheel;
• a second bar, a bottom end of the second bar being connected with the rear wheel directly;
• a third bar having a front section, a middle section and a rear section connected with each other to form a closed loop structure, the front section being pivoted to an upper section of the first bar, the rear section being pivoted to a lower section of the second bar, and the front section, the middle section and the rear section being in different planes;
• a fourth bar pivoted between the first bar and the second bar;
• and
• a first pivot unit disposed between the second bar and the fourth bar, and movably switched between an unfolded mode and a folded mode, the first bar and the fourth bar being stabilized at the same direction via the first pivot unit switched to the unfolded mode so that the front wheel is distant from the rear wheel, the fourth bar being rotated relative to the first bar and the second bar via the first pivot unit switched to the folded mode so that the front wheel is moved toward the rear wheel,
• wherein
• the second bar is pivoted to the fourth bar through the first pivot unit,
• upon the first pivot unit being switched from the unfolded mode to the folded mode, the front section is configured to move away from the front wheel, and
• the first pivot unit comprises a locking component that is movable to constrain or allow relative rotation between the second bar and the fourth bar.