Structure for assembling and disassembling dirt suction head to/from filter bag

A structure for assembling and disassembling a dirt suction head to/from a filter bag, comprising:

• a filter bag body;
• a first connection piece (2);
• a second connection piece (3);
• and
• a connection pipe (4), wherein one end of the second connection piece (3) is detachably connected to the connection pipe (4), and the other end of the second connection piece (3) is provided with a holding cavity (3.1);
• one end of the first connection piece (2) is assembled inside the holding cavity;
• a circumferential side edge of the opening of the filter bag body (1) is tightly pressed and fixed between an outer side wall of the first connection piece (2) and an inner side wall of the holding cavity (3.1),
• wherein
• a fitting buckle is disposed at an end of the second connection piece (3) away from the first connection piece (2),
• a fitting slot matched with the fitting buckle is disposed at an end of the connection pipe (4),
• the fitting buckle is an insertion column (3.4), and a positioning fitting slot (3.4.1) is disposed on a side wall of the insertion column (3.4),
• an annular mounting plate (5) is disposed at an end of the connection pipe (4),
• an avoiding hole (5.1) for the insertion column (3.4) to penetrate through is disposed on the mounting plate (5), and
• the insertion column (3.4) is rotatable by a preset angle along an opening direction of the positioning fitting slot (3.4.1) after insertion into the avoiding hole (5.1) along an axial direction, to enable the positioning fitting slot (3.4.1) to be cooperated with a side wall of the avoiding hole (5.1).

A structure for assembling and disassembling a dirt suction head to/from a filter bag, comprising:

• a filter bag body:
• a first connection piece (2);
• a second connection piece (3);
• and
• a connection pipe (4), wherein one end of the second connection piece (3) is detachably connected to the connection pipe (4), and the other end of the second connection piece (3) is provided with a holding cavity (3.1);
• one end of the first connection piece (2) is assembled inside the holding cavity;
• a circumferential side edge of the opening of the filter bag body (1) is tightly pressed and fixed between an outer side wall of the first connection piece (2) and an inner side wall of the holding cavity (3.1),
• a limiting insertion hole (3.2) is disposed at the bottom of the holding cavity (3.1), and a limiting insertion buckle (2.1) correspondingly matched with the limiting insertion hole (3.2) is disposed at an end of the first connection piece (2),
• wherein
• a fitting buckle is disposed at an end of the second connection piece (3) away from the first connection piece (2), and a fitting slot matched with the fitting buckle is disposed at an end of the connection pipe (4),
• the fitting buckle is an insertion column (3.4),
• a positioning fitting slot (3.4.1) is disposed on a side wall of the insertion column (3.4),
• an annular mounting plate (5) is disposed at an end of the connection pipe (4),
• an avoiding hole (5.1) for the insertion column (3.4) to penetrate through is disposed on the mounting plate (5), and
• the insertion column (3.4) is rotatable by a preset angle along an opening direction of the positioning fitting slot (3.4.1) after insertion into the avoiding hole (5.1) along an axial direction, to enable the positioning fitting slot (3.4.1) to be cooperated with a side wall of the avoiding hole (5.1).