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  • Precise mechanical latch (help)

    Discussion in 'The main mechanical design forum' started by Dirs_dissman, Nov 24, 2011.

    1. Dirs_dissman

      Dirs_dissman Guest

      Hi everyone,


      I have two aluminium detail with flat surfaces, that I want to connect one to another. (let's say around 2-3 cm2). One of them is on the top and it fixed to my setup. Another one is on the bottom. There will be a distance between them around 3-5 mm for PCB, that will be connected to the bottom part.


      I want to have an opportunity to easily disconnect the bottom part with pcb. I mean no screws and nuts.
      I am thinking about some spring - like in a pen - click - and it fixed, another click and it unfixed. Or some nut with no thread, but with a button to fix/unfix it.


      Please, advice me some keywords, with which I will be able to find some suitable solution in a shops. Or advice me your solution,
      Thanks in advance!
       
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    3. Karl A Petersen

      Karl A Petersen Member

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      You have not provided enough information to have anyone make a useful suggestion. It appears you want to put something like an SD memory card into a box, giving it a connection, then close and latch the box from below. Do you need to make electrical connections? Do you need to support the pcb flexibly? Does it need to be sealed? Does it really need a bottom closure or can the PCB just snap in by itself, unsealed?
       
    4. kandarp26

      kandarp26 New Member

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      The one example as we think is an spacer a simple block of metal or plastic to cover the space simply but if we think of flexibility then the best one will be a packing of rubber or other such type of material.You can think like that way actually it is a point of electrical so i could not help you out much.
       
    5. Dirs_dissman

      Dirs_dissman Guest

      Clarifying

      [​IMG]
      Thanks you guys for response.
      There will be no box. The PCB will have contacts from the both sides. This detail will be hanged on the holder that I've shown.
      Well, with dashed line I showed the screw/pawn/whatever that I want to make. The main aim of all these is to make the process of changing PCB easier.
       
      Last edited by a moderator: Nov 25, 2011
    6. Karl A Petersen

      Karl A Petersen Member

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      Thanks for clarifying.

      It would be wise to use an existing interconnect method such as SD card, PCM-CIA card or simple edge connector.

      If you need to be different, the sketch shows something which could be prototyped with a plastic jar lid and some foam rubber or could be very nicely machined and finished. The little tray holds the PCB and both the PCB and tray can only be inserted in one orientation for safety. It is easy to see that the PCB is in place before raising it up into the body.
      http://petersen.bz/PreciseMechanicalLatch01.tif
       
    7. mvalenti

      mvalenti Well-Known Member

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