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Latch Mechanism Comprising Plastic Parts

IP.com Disclosure Number: IPCOM000047076D
Original Publication Date: 1983-Sep-01
Included in the Prior Art Database: 2005-Feb-07

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Nomura, H [+details]


The disclosed latch mechanism comprises two plastic parts wherein the Z-shaped part is caused to be firmly engaged or disengaged with the L-shaped part without requiring substantial force. The prior latch mechanism, as shown in Fig. 1A, is disadvantageous in that force F1 applied to part 1 and/or force F2 applied to part 2 tend to easily deform part 2, thereby causing undesirable disengagement of the latch to occur. While such shortcoming can be avoided by increasing the strength of part 2, this in turn leads to another problem that force F3, required for engagement and disengagement of the latch, will be increased accordingly. With reference to Fig. 1B, the latch is disengaged by means of bending torque T1 having arm length L, which is produced around fulcrum point B as a result of the force acting on point A.