| CPC A41D 27/28 (2013.01) [F04D 25/084 (2013.01)] | 18 Claims |
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1. A ventilation apparatus that is removably attachable to a garment, the ventilation apparatus comprising:
a motor;
a fan configured to be rotationally driven by the motor around a first axis, the first axis defining a front-rear direction of the ventilation apparatus;
a housing (i) accommodating the motor and the fan and (ii) including a peripheral wall part and a first clamping part, the peripheral wall part (i) having a hollow cylindrical shape and (ii) is around the fan, the first clamping part protruding radially outward from a rear end portion of the peripheral wall part; and
a ring (i) having a hollow cylindrical shape, (ii) removably mounted around the peripheral wall part of the housing and (iii) having a second clamping part in front of the first clamping part of the housing and configured to clamp a fabric of the garment in conjunction with the first clamping part;
wherein:
at least one projection protrudes from a first surface in a radial direction of the peripheral wall part, the first surface being one of an outer peripheral surface of the peripheral wall part and an inner peripheral surface of the ring,
at least one engagement wall and at least one guide wall each protrude from a second surface in the radial direction, the second surface being the other one of the outer peripheral surface of the peripheral wall part and the inner peripheral surface of the ring,
the at least one engagement wall (i) is adjacent to one end of the at least one guide wall in a circumferential direction and (ii) has at least one engagement surface configured to block the ring from moving forward relative to the housing to prevent the first clamping part and the second clamping part from moving away from each other in the front-rear direction,
the at least one guide wall has a guide surface configured to guide the ring rearward relative to the housing and to guide the at least one projection to at least one engagement position at which the projection is abuttable on the at least one engagement surface,
the at least one engagement surface and the guide surface face opposite directions from each other in the front-rear direction, and
in a direction in which the projection moves away from the guide surface in the front-rear direction, an open space extends from the guide surface to an area that corresponds to an end of the second surface.
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