① Replace the T-pin and file a new one with a flat iron according to the original pin. When installing the bolt, firstly flatten the directional inward projection of the upper umbrella pole, install the bolt on the round holes of the handles at both sides, push the umbrella pole to cross the inward projection handle, and then reset the inward projection handle. At this time, close the umbrella, press start, and the umbrella can be automatically opened in sections, unimpeded. Repeatedly, it will be repaired if it is not separated.

②? The iron wire with the diameter of 1 mm can be folded and bent into a T-shaped needle according to the original shape, or it can be replaced. Pay attention to the corner clamping, and the whole pin cannot exceed? 1? I-shaped steel groove, otherwise there will be resistance to opening the umbrella. The surplus part can be leveled with a small file, and the installation method is as above.

Knowledge expansion:

An umbrella is a tool to provide a cool environment or shelter from rain and snow. Umbrella, the English word umbrella, comes from Latin umbra, which means shade and shadow. The oldest folding umbrella is probably the oil-paper umbrella gradually formed in China, which was used until the Republic of China. Umbrellas are usually made of malleable cloth, as well as other materials that can be used as skeletons and wound metal wires. When in use, lift it by hand. Although the umbrella was originally invented as a rain gear in rainy days, it is now often used to block the sun.