In this video, I dive into the exciting world of the ejection mechanism for a DVD player. The hook which mechanically keeps the DVD player in check is an essential piece of the puzzle. Also noteworthy is a small micro switch, which ensures the device acknowledges when a DVD is fully in. With a bit of blue-tack trickery, we convince the DVD player there's a DVD inserted. The key players are this cam-shaped, blue protrusion and worm gear. In a clever turn of events, the movement of these components manipulates the hook controlling the ejection. Quite astute of our humble DVD player, don't you think? For a more detailed deconstruction, do check out the extras channel. Cheers for watching!
[0:00] so I did a post on this on the extras
[0:02] Channel but I thought the mechanism was
[0:04] interesting enough that we should do it
[0:06] on the main channel so this is the
[0:08] ejection mechanism for a little DVD
[0:10] player now this Hook is the thing that
[0:13] keeps the DV play DVD player pushed in
[0:16] and you do have this little hole here
[0:17] that you can poke something into and
[0:20] then you can wiggle it to release the uh
[0:24] the DVD player if it’s got stuck so that
[0:28] works that way for the manual ejection
[0:30] but the automatic ejection with the
[0:32] button is pretty interesting so what I’m
[0:35] going to do is I’ll just uh this little
[0:39] micro switch is the thing that tells the
[0:42] device that the um DVD is all the way in
[0:46] so I’ll just stick a bit of um blue tack
[0:48] in there to make that
[0:51] switch so now the DVD player thinks
[0:54] there a DVD
[0:56] in now this mechanism is really quite
[1:00] interesting so if I hit the eject
[1:07] button that’s not
[1:09] quite switched
[1:12] in okay so
[1:16] see let’s make sure this is actually
[1:19] engaged so if I hit the eject
[1:23] button you can see that what happens is
[1:27] this Carriage moves back it hits this um
[1:30] small blue protrusion on this um this
[1:33] cam shaped
[1:35] thing and what’s happening is when it
[1:38] does that so if I move this back
[1:39] manually you can see the blue Cam moves
[1:43] slightly not by
[1:45] much but that’s enough to engage a
[1:48] little pointy out part on this blue Cam
[1:51] and they keep turning this worm gear
[1:54] which then pushes this even further so
[1:57] if we lift the worm gear out of the way
[2:01] should be able to take that out cu I’ve
[2:03] undone the
[2:06] screws then you can see underneath we
[2:09] have this little pointy out bit and that
[2:12] engages with the worm gear and then they
[2:14] keep turning the worm gear which then
[2:16] rotates this even further which then
[2:19] moves the hook so pretty intriguing
[2:22] mechanism quite uh quite
[2:26] clever I thought that was quite smart um
[2:30] so everything is just controlled by this
[2:32] worm gear which is uh very minimal on
[2:35] the component count so check out the
[2:37] extras channel for a more detailed um
[2:40] take apart and try and fix but yeah
[2:42] thanks for watching