Freelancer: knowledgetower
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Báo cáo bài thi

Modified Flat Spring Tong Lock

Please refcdeive the modified proposal as discussed. While at the farm I made a quick proof of concept using wood, screews, and a flat spring. The whole mechanism works well. I have attached three photographs I took of the quick prototype.


                                                                                                                        Bài tham dự cuộc thi #                                            19
                                         cho                                             Locking mechanism Design for a pair of tongs
Bài tham dự #19

Bảng thông báo công khai

  • knowledgetower
    knowledgetower
    • cách đây 4 tháng

    When the center of the dpring conincides with the hinge center-line ther is still a positive but diminished moment exerted by the spring. It only reaches zero when the contact point reaches the same point. I checked this practically and the physics does makes sense.

    • cách đây 4 tháng
  • knowledgetower
    knowledgetower
    • cách đây 4 tháng

    Your point number 2 is correct and is catered for. It is shaped like a rivet with a top and bottom "hat" so that the slider does not pull off. I can show it in the drawing.

    • cách đây 4 tháng
  • knowledgetower
    knowledgetower
    • cách đây 4 tháng

    Hi. I was thinking the same but had some doubt that is why I made the prototype. The neutral position is when the contact point of the spring at the bottom conincides with the hinge centre.

    • cách đây 4 tháng
  • gent88
    Chủ cuộc thi
    • cách đây 4 tháng

    You may want to take a look at #12 which seems to be a possible design except I don't understand it 100%.

    • cách đây 4 tháng
  • gent88
    Chủ cuộc thi
    • cách đây 4 tháng

    I think that neutral position that the thumb slider should not be pushed further to the left is when the midpoint of the spring coincides with the center of the hinge.

    • cách đây 4 tháng
  • gent88
    Chủ cuộc thi
    • cách đây 4 tháng

    Amazing work, my friend! A couple of things, 1) the thumb button should not be allowed to move all the way to the left as this would make the pair of tongs bias open. There is a position that it should stop moving so there is no bias force when the tongs are in use. 2) The thumb button should be larger and ergonomic to make it comfortable. Also, there needs some joining means to hold the top and bottom part of the slider together or otherwise the slider will come apart.

    • cách đây 4 tháng

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