I believe the buckler shield was pretty standard kit, and yes it was for close quarter fighting used to smash in to the face area and to obscure vision on and post impact as well as protection from weapon blows, as much an attack weapon as a defence. It was carried on to the waist belt.
I just copied this from wiki-
Hand protection: The primary use of the buckler was to protect the sword hand.
Deflector: The buckler's lightness and curved center made it excellent for deflecting attacking blades.
Blinder: The light blades used in conjunction with the buckler depended on rapid movements, which meant that a single second was an important advantage. The wielder of the buckler could use the buckler to shield his sword-hand's position from view, keeping his opponent from guessing his next strike.
"Metal fist": A buckler could be used to directly attack an opponent by punching with either its flat face or its rim.
Binder: The buckler could be used to bind an opponent's sword hand and weapon as well as their buckler against their body. The buckler was also very useful in grappling, where it allowed an opponent's arms to be easily wrapped up and controlled.
This is a generalization of buckler shields, the bowmen's buckler shield had a round protruding centre boss for face rearranging.
Here's a good illustration of them in action I reckon,
Ruddy Darter.