| CPC B01D 46/0016 (2013.01) [B01D 46/0002 (2013.01); B01D 46/0039 (2013.01); B01D 46/12 (2013.01)] | 5 Claims |
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1. A filter frame, comprising:
a support supporting a filter member for air filtration, wherein
the support includes a first support and a second support which are connected to each other to be rotatable with respect to each other, and
each of the first support and the second support includes:
a body part including a first vertical member extending in an up-down direction, a horizontal member having one end connected to the first vertical member to be perpendicular thereto, and a second vertical member connected to the other end of the horizontal member and extending in the up-down direction;
a cylindrical shaft part connected to the first vertical member at a position between an upper end and a lower end of the first vertical member and extending in the up-down direction;
a rotating part connected to the second vertical member at a position between an upper and a lower end of the second vertical member and formed to surround at least a portion of the shaft part;
a locking part provided on at least one of the first vertical member and the shaft part; and
an engaging part provided on at least one of the second vertical member and the rotating part, and formed to be engaged and fixed to the locking part,
the rotating part of the second support is rotatably coupled to the shaft part of the first support,
the locking part of the first support and the engaging part of the second support are engaged and fixed to each other to prevent the first support and the second support from freely rotating when the horizontal member of the first support and the horizontal member of the second support form a predetermined angle,
the first support includes a plurality of the first supports and the second support includes a plurality of the second supports,
the plurality of first supports and the plurality of second supports are continuously connected in such a manner that the shaft part of one of the first support and the second support and the rotating part of the other of the first support and the second support are rotatably engaged to each other,
when each of the plurality of supports is rotated with respect to the support adjacent thereto to form an angle less than a straight angle with respect to an adjacent support, the plurality of supports are arranged along a loop-shaped path,
when the first support and the second support are arranged to form the straight angle, when the first support and the second support overlap each other to be arranged in parallel, or when the first support and the second support are arranged so that an internal area of the loop-shaped path is maximized, the locking part of the first support and the engaging part of the second support are engaged and fixed to each other to prevent the first support and the second support from freely rotating with respect to each other,
the locking part of the first support includes a first locking piece formed on a side surface of the body part and a second locking piece formed on an inner surface of the body part,
the engaging part of the second support includes a first engaging piece formed on a side surface of the body part and a second engaging piece formed on an inner surface of the body part,
when the first support and the second support are arranged to form the straight angle, the first locking piece and the first engaging piece are engaged, and
when the first support and the second support overlap each other to be arranged in parallel, the second locking piece and the first engaging piece are engaged.
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