What is the significance of iron plates or bells hanging on the eaves of ancient houses?

Mainly under the eaves of temples. It's called a golden bell jar, a golden bell jar. Bell-shaped, with copper beads inside and handles at the top, with different shapes. When esoteric Buddhism practiced Buddhism, it shocked the venerable or pleased him. The bell has three meanings: alarm, joy and statement. Ringing a bell to support the gods is called ringing a bell. It also uses a part of the diamond pestle as its handle, so it is called the diamond clock. There are five kinds of clocks, namely, single-lobe clock, three-lobe clock, five-lobe clock, Ling Bao clock and tower clock, which are called five kinds of clocks. They are usually placed in a fixed position on the altar with five kinds of pestles. "Five" is the symbol of five wisdom and five buddhas, and the bell is the saying. Vajrayana is the first of the 37 statues, the samadhi of Vajrayana; The drill bell is the Samadha terrain of the last Buddha.