CLUTCH FOR BLINDS
FIG11 is a side view of the chain guard housing and clutch assembly of FIG8 in the engaged state  FIG12 is a side view of the chain guard housing and clutch assembly of FIG8 in the disengaged state
FIG11 is a side view of the chain guard housing and clutch assembly 200 in the engaged state. In the engaged state the rim 232 of the wheel cover 230 covers a portion of the chain wheel 220, such that the chain cannot become disengaged from the teeth 223 during rotation. In the engaged state, the cylindrical body 231 of the wheel cover 230 is fully inserted into the chain wheel 220.  FIG12 shows the disengaged state, in which the rim 232 of the chain wheel cover 230 does not cover the teeth 223. In this disengaged state, the chain may be inserted into or removed from the chain guard housing and clutch assembly 200.
side view
210
drive spline
230
cover
223
teeth
220
chain wheel
232
rim
200
clutch assembly
['1. A chain guard housing and clutch assembly (100, 200) for a blind comprising, a first end (100\', 200\') which is inserted into a roller blind tube; a second end (100", 200") engageable with a wall mounting bracket; a drive spline (110, 210) forming the outer part of the chain guard housing and clutch assembly which engages with the inside of a roller blind tube; a chain wheel (120, 220), connected to the drive spline (110, 210); a chain cover module (130, 230) comprising a rim (132, 232), the rim covering part of the chain wheel (120, 220); a central pin (114, 214) extending from the drive spline at the first end, the central pin comprising at least one deformable leg (115, 215) engaged with the chain cover (131, 231) via an outward facing catch face (116, 216) on the leg, thus preventing axial movement of the chain cover module relative to the drive spline;  characterized in that a quick release actuator (140, 240) is located at a second end of the assembly comprising an inner annular abutment surface (145, 245) in contact with the at least one leg (115, 215).']