Scraper

A scraper, comprising:

• a housing, defining a mounting cavity with an opening and a guiding hole communicated with the mounting cavity;
• a connecting member, slidably mounted in the mounting cavity and comprising:
• a connection body;
• a button portion, connected to the connection body and at least partially arranged in the guiding hole, wherein the button portion is configured to be pushed to enable the connection body to slide in the mounting cavity;
• and
• a clamping portion, connected to an end of the connection body and configured to fasten a working blade, wherein the working blade is configured to at least partially extend out of the mounting cavity or to be retracted in the mounting cavity through the opening;
• wherein:
• the clamping portion comprises a clamping base plate and a clamping cover plate, the clamping base plate is connected to the end of the connection body, the clamping cover plate is arranged opposite the clamping base plate, and the clamping cover plate and the clamping base plate cooperatively define a clamping gap with an exposure opening;
• the exposure opening is located at an end of the clamping portion away from the connection body, the working blade is mounted in the clamping gap, and a blade edge of the working blade extends out of the clamping gap through the exposure opening;
• one of the clamping base plate and the clamping cover plate comprises at least one limiting protrusion, and the other of the clamping base plate and the clamping cover plate defines at least one limiting groove;
• the at least one limiting protrusion is engaged in the at least one limiting groove;
• and
• the number of the at least one limiting protrusion is at least two, and the number of the at least one limiting groove is at least two;
• the at least two limiting protrusions are arranged at intervals along a width direction of the clamping base plate on both sides of the clamping base plate, and the at least two limiting protrusions are engaged in the at least two limiting grooves in a one-to-one correspondence.