| 摘要 |
<p>A port and perch insert for fitting into an aperture (22, 23, 24) in a wall of a container (12) of a bird feeder comprises a two-part combination of a first part (25) with a port (15) having, a first engaging element (26) to engage the container wall within the container and a second part (20) in the form of a locking member engageable with the first part and having a second engaging element (28) which engages with the container wall when the two parts are inserted and locked together. The first and second engaging elements between them retain the insert in engagement with the container wall in such a way that the second part must be disengaged from the first to enable both parts to be removed from the container wall. The second part (20) suitably comprises a U-shaped perch section (42) and a part-cylindrical recess (44) which engages a correspondingly shaped surface on the first part, enabling it to pivot so that its engaging member (28) engages in a slot (24) of the container wall and the perch section (42) fits within a similarly shaped perch section (36) of the first part to form a U-shaped perch adjacent the port (15).</p> |
