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Thread: Question on how to design locking mechanism?

  1. #1
    Associate Engineer
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    Nov 2013
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    Question on how to design locking mechanism?

    Hello everyone!

    I will be quick to point out that I am not an engineer, but do have a great interest in many things engineering related. I come to you looking for some sort of guide about locking mechanisms. I am not even sure if that is the term, but just think of a microSD card holder in a modern cellphone. Where can I learn about mechanisms like this? Perhaps an overview of the various key principles in locking a component in place, with popular designs cited as examples...

    Secondly, if I were to have something similar to an sd card retention mechanism designed, what engineering qualifications lend themselves to this type of project? This is the domain of a mechanical engineer I would assume, but is there any field that is more specifically focused on such things?

    Thank you for taking the time to read my post!

  2. #2
    Administrator Kelly Bramble's Avatar
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    Feb 2011
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    Bold Springs, GA
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    Welcome to EE!

    I believe that there are the following three write protect methods used on Micro SD Memory Cards:

    - Mechanical write protect switch (Host responsibility only)
    - Card internal write protect (Card's responsibility)
    - Password protection card lock operation.

  3. #3
    Associate Engineer UK-David's Avatar
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    Dec 2013
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    I think he/she is talking about the stainless steel spring loaded carrier that holds the memory card inside the phone?

  4. #4
    Associate Engineer
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    Aug 2013
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    Quote Originally Posted by Kelly Bramble View Post
    Welcome to EE!

    I believe that there are the following three write protect methods used on Micro SD Memory Cards:

    - Mechanical write protect switch (Host responsibility only)
    - Card internal write protect (Card's responsibility)
    - Password protection card lock operation.
    I agree with you! these methods are so good protect your SD card.

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