thingiverse
This design is based on a toggle clamp and the difference is that the last part of the stroke is linear. As an example, this feature is useful for applications in which a probe must come in contact with a PCBA to test or program it. This is where I got the idea from. This design can be used like a normal toggle clamp because a fair amount of force can be applied at he end of the stroke and the clamp will hold just fine. I tried it with the kitchen scale and 3kg was not a problem but this was the maximum value of the scale.
This design consist of 16 parts (2× part 12) as can be seen in the PDF drawing. The linear stroke is as long as the slot in part 6 and 11 which is 10mm.
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EDIT: I have created a T-slot plate which can be used to fixate things to grind them and I have modified the two brackets to match the 20mm pitch https://www.thingiverse.com/thing:3641151. The updated files are: LTF-M-50105 and LTF-M-50115.
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This STL file is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
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