Easily assembled filter adaptor assembly

An easily assembled filter adaptor assembly comprising:

• a front mounting ring having
• a rear end;
• a connecting ring portion axially protruding from the rear end of the front mounting ring;
• an inner sidewall defined inside and around the front mounting ring and having a sub inner sidewall, and the sub inner sidewall defined inside and around the connecting ring portion;
• and
• a limiting flange radially protruding from and formed around the sub inner sidewall around the connecting ring portion;
• a holding ring detachably mounted in the connecting ring portion of the front mounting ring, so as to selectively hold a filter between the holding ring and the connecting ring portion of the front mounting ring;
• a rear mounting ring disposed at a rear of the front mounting ring and spaced apart from the front mounting ring, the rear mounting ring having a positioning ring portion, and the positioning ring portion axially protruding from a rear end of the rear mounting ring;
• multiple intermediate rings separately arranged between the front mounting ring and the rear mounting ring, and each of the intermediate rings having
• an annular shoulder extending radially and having an outer peripheral edge and an inner peripheral edge;
• a front mounting ring portion protruding from the outer peripheral edge of the annular shoulder toward the front mounting ring;
• and
• a rear mounting ring portion protruding from the inner peripheral edge of the annular shoulder toward the rear mounting ring and having
• a connecting end edge attached to the inner peripheral edge of the annular shoulder;
• and
• a distal end edge;
• and
• wherein the front mounting ring portion of the intermediate ring that is disposed next to the front mounting ring is mounted around an outer sidewall of the front mounting ring and is detachably connected with the front mounting ring, so as to selectively hold a filter between the limiting flange of the front mounting ring and the connecting end edge of the intermediate ring that is disposed next to the front mounting ring;
• and
• the rear mounting ring is mounted around an outer sidewall of the rear mounting ring portion of the intermediate ring that is disposed next to the rear mounting ring and is detachably connected with the intermediate ring that is disposed next to the rear mounting ring;
• at least one inner mounting ring, each of the at least one inner mounting ring is mounted between two of the intermediate rings that are disposed next to each other and has
• a front end;
• a rear end;
• and
• a stop flange radially protruding from and formed around an inner sidewall of the inner mounting ring;
• wherein the front mounting ring portion of the intermediate ring that is disposed at the rear end of the inner mounting ring is mounted around an outer sidewall of the inner mounting ring and is detachably connected with the inner mounting ring, so as to selectively hold a filter between the stop flange of the inner mounting ring and the connecting end edge of the rear mounting ring portion of the intermediate ring that is disposed at the rear end of the inner mounting ring;
• the rear mounting ring portion of the intermediate ring that is disposed at the front end of the inner mounting ring is mounted around the inner sidewall of the inner mounting ring and is detachably connected with the inner mounting ring, so as to selectively hold a filter between the stop flange of the inner mounting ring and the distal end edge of the rear mounting ring portion of the intermediate ring that is disposed at the front end of the inner mounting ring.