Hello
In the context of designing plastic enclosures, I define interlocking shapes but I don't know how to solve the case presented below:
Hello;
Isolates the " Yellow " Trapdoor body.
On a plane perpendicular to the Trappe, a new rectangular sketch of the " shoulder" was created.
Then create a new 3D sketch and " Convert the inner outline of the Trap.
Use the " Smoothing " feature with these two new sketches. By being careful with which body to merge it (here only the trapdoor ").
The same technique can be used to remove the opposite material from the Case.
Hello Maclane,
Thank you for the answer.
If I understood the approach correctly, I get this:
Have a nice day
Hello
Watch out for protruding edges. Keeping an opening direction aligned with the center of the spherical surface may be preferable:
Hello Silver_Surfer,
Thank you for the interest to my Pb ...
Is it possible to recover the file of your solution?
From a design point of view, it seems to work but I want to generalize to shapes other than spherical. Ex:
In addition, the solution is not simple from a process point of view (undercut shapes that cannot be removed from plastic injection)
I would like to keep the edges of the socket perpendicular to the parting line (bottom of the case) for unmolding.
Solutions can always be found for the demolding but I agree, there will be an impact on the price of the mold.
But staying in the opening direction, not sure that the filling faces correctly in this area:
For the recovery of the files, well I would have liked to send it but, I have SW2022 and SW2024 available. And with the educational licenses, I can't re-record in SW 2023 since 2024. Sorry!
I am in SW2025 SP3, registered in V2023.
I'm still on my end and surprised that we can't get this easily enough:
Well, it's okay, it's going to play... I'm just going to correct the direction of inserting the hatch.
Super!
Thank you for this solution which suits me well, but not easy to approach.
You have to know the surface mode, which is not my case.
I'll try to reproduce for the previous mouse.
Hello @ajrigaud ,
Below is another approach, with only volume extrusions/removals.
It may get a little more complicated if you try to apply drafts to the trap area, as is the case for the interlocking of the bottom...
Base Quarter Spherical Case (V2023)V1.SLDPRT (418.1 KB)
Again, thank you m_blt for your proposal.
I had tested a solution of this kind but it cannot be extrapolated (revolution function) to left shapes such as the previous mouse.
I think that the surface solution must be.
And yet...
Well, I don't have your expertise 
Is it possible, too, to have the sldprt file?
Have a nice day.
The problems encountered are not related to the process of creating the geometry, but rather to the difficulties for Solidworks to process complex surfaces:
Conclusion: you have to be persistent and try to get around the problems...
My pseudo mouse is attached.
To be handled with care, it is fragile...
Mouse Case Base (V2023)V1.SLDPRT (422.0 KB)
Well, I take note of the conclusion 
The difficulty is to appropriate the sometimes convoluted approach of certain conceptions...
@m_blt is right, there is a way to make it simpler.
Base Quarter Spherical Case (V2024) v2. SLDPRT (417.8 KB)
I admit to having an annoying tendency to go on the surface...
Well, obviously, it's better that way...
Lots of ways to do it.
Good night
