Bed to chair mechanism

Postby bwtalbot » June 19th, 2012, 9:22 am


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I'm an industrial designer working on a new bed concept for a client and I'm trying to figure out how the new Lufthansa business class seats work in the video below.

http://www.youtube.com/watch?v=xru_LBFMTuU. Watch the way the seat reclines from 0.06

Its not a traditional recliner chair or adjustable bed mechanism because as the head of the seat moves down in to the bed position, the head doesn't actually move back (like a recliner) or forwards (like an adjustable bed). Just straight down. The seat base slides forward to compensate for this.

Anyone know how it works? The I only way I can see to make something similar would be using several separate mechanisms (linear actuators and sliding mechanisms).

Re: Bed to chair mechanism

Postby Lmo » June 19th, 2012, 6:22 pm

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I don't think it's as the backrest is as "complicated" as you think. The lower leg portion has some subtle mechanics going on as well.

Here's a sh0rtened loop of that segment; it's easier to see if you don't have to watch the whole thing... IMO.
http://www.tubechop.com/watch/405940

I can see to make something similar would be using several separate mechanisms (linear actuators and sliding mechanisms).


If this seat frame, manufactured by Ceratizit, "... for the Business Class seats of a leading aircraft manufacturer" is any indication, I think you are correct.

Cool stuff going on here, check out the axial recirculating ball bearings (upper left) adjacent to the bracket with the printing on it. Manufacturers note states many components are titanium.

Image

Moving your question to "Transportation", we'll see how if flies there.. .. . .yeah, I know... . :wink:
Lew Morris
"It's what you discover, after you know it all, that counts." _ John Wooden

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Re: Bed to chair mechanism

Postby thomas921 » October 22nd, 2012, 2:26 pm


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It sounds pretty advanced. It'd be awesome if you post a picture of it when you're done. I'm also wandering around considering an education within industrial design!

bwtalbot wrote:I'm an industrial designer working on a new bed concept for a client and I'm trying to figure out how the new Lufthansa business class seats work in the video below.

http://www.youtube.com/watch?v=xru_LBFMTuU. Watch the way the seat reclines from 0.06

Its not a traditional recliner chair or adjustable bed mechanism because as the head of the seat moves down in to the bed position, the head doesn't actually move back (like a recliner) or forwards (like an adjustable air bed). Just straight down. The seat base slides forward to compensate for this.

Anyone know how it works? The I only way I can see to make something similar would be using several separate mechanisms (linear actuators and sliding mechanisms).

Re: Bed to chair mechanism

Postby bwtalbot » November 9th, 2012, 11:42 am


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Posts: 11
Joined: May 6th, 2008, 3:03 am
Location: Bristol / Derby, UK
As it turned out what I wanted to achieve wasn't actually that difficult. Once I figured out the principle it was actually pretty simple, I even made a working lego model.

Unfortunately I only have one photo of it. (see attached) v=zacyCORD_0I
2012-07-09 14.06.14.jpg
Lego model


I've also attached a side view of a CAD model I made of the mechanism, unfortunately I cant really show any more as its for a client.

Another company are already using the same method, http://www.youtube.com/watch?
Attachments
Mech 6.JPG
Side view of cad model

Re: Bed to chair mechanism

Postby Lmo » November 9th, 2012, 12:21 pm

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Gotta love Lego engineering models.

bw, we'd love to see your YouTube posting but the link seems to be screwed up.

To post a YT directly to your reply - copy everything after the "="

Using this example: http://www.youtube.com/watch?v=ydu1wJBa7eI

i.e., ydu1wJBa7eI

click on the YT button at the upper right,

and then paste (Cntr/V) it between the brackets [ ] .

ref. (I left out the"e" on youtube so it would not hyperlink the example)

[youtub-]ydu1wJBa7eI[/youtube]

and it should look like this (except different of course...)
Lew Morris
"It's what you discover, after you know it all, that counts." _ John Wooden

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