Dental radiology image sensor with soft overmolding
The invention relates to an intra-oral dental radiology sensor. The sensor comprises an electronic image acquisition module and a molded casing made of a hard plastic which is locally provided with overmoldings made of a softer plastic having the consistency of smooth rubber, covering the hard plastic in areas located on the outside of the casing and corresponding to projecting angular portions of the hard plastic, and also in areas located inside the casing at places where the electronic module may bear. The soft plastic is preferably a copolymer of the SEBS (styrene/ethylene-butylene/styrene) type whereas the hard plastic is preferably a polyamide. The patient's comfort is improved and the module is better protected against shocks without increasing its size.
1. An intra-oral dental radiology image sensor comprising an electronic image acquisition module and a molded casing made of a hard plastic, wherein the casing locally includes overmoldings made of a softer plastic having the consistency of smooth rubber covering the hard plastic in areas located on the outside of the casing and corresponding to projecting angular portions of the hard plastic, and also in areas located inside the casing at places where the electronic module may bear.
2. The radiology image sensor as claimed in claim 1 , wherein the hard plastic is a polyamide.
3. The radiology image sensor as claimed in claim 2 , wherein the soft plastic overmolded parts inside the casing are connected to soft plastic parts on the outside of the casing via bridges formed in openings provided in the hard plastic parts.
4. The radiology image sensor as claimed in claim 2 , wherein the soft plastic is an SEBS (styrene/ethylene-butylene/styrene) copolymer.
5. The radiology image sensor as claimed in claim 1 , wherein the soft plastic is an SEBS (styrene/ethylene-butylene/styrene) copolymer.
6. The radiology image sensor as claimed in claim 5 , wherein the soft plastic overmolded parts inside the casing are connected to soft plastic parts on the outside of the casing via bridges formed in openings provided in the hard plastic parts.
7. The radiology image sensor as claimed in claim 1 , wherein the soft plastic overmolded parts inside the casing are connected to soft plastic parts on the outside of the casing via bridges formed in openings provided in the hard plastic parts.
8. The radiology image sensor as claimed in claim 7 , wherein the soft plastic is an SEBS (styrene/ethylene-butylene/styrene) copolymer.
9. The radiology image sensor as claimed in claim 1 , wherein one part of the shell is specifically intended to form an area sensitive to the touch for the practitioner's finger so as to help him to position the sensor in the patient's mouth, this specific sensitive area being coated with the soft plastic having the consistency of smooth rubber.
10. The radiology image sensor as claimed in claim 9 , wherein the soft plastic overmolded parts inside the casing are connected to soft plastic parts on the outside of the casing via bridges formed in openings provided in the hard plastic parts.
11. The radiology image sensor as claimed in claim 9 , wherein the soft plastic is an SEBS (styrene/ethylene-butylene/styrene) copolymer.
12. The radiology image sensor as claimed in claim 1 , wherein the casing includes a dome through which a cable passes, and this dome consists only of soft plastic, not resting on hard plastic but fastened to other soft plastic portions resting on hard plastic.
13. The radiology image sensor as claimed in claim 12 , wherein the soft plastic overmolded parts inside the casing are connected to soft plastic parts on the outside of the casing via bridges formed in openings provided in the hard plastic parts.
14. The radiology image sensor as claimed in claim 12 , wherein the soft plastic is an SEBS (styrene/ethylene-butylene/styrene) copolymer.
15. The dental radiology image sensor as claimed in claim 1 , wherein the casing is formed from a shell and a baseplate welded to the shell, the shell having soft plastic overmolded areas.
16. The dental radiology image sensor as claimed in claim 15 , wherein the baseplate is ultrasonically welded to a hard plastic part of the shell.
17. The radiology image sensor as claimed in claim 16 , wherein the soft plastic overmolded parts inside the casing are connected to soft plastic parts on the outside of the casing via bridges formed in openings provided in the hard plastic parts.
18. The radiology image sensor as claimed in claim 16 , wherein the soft plastic is an SEBS (styrene/ethylene-butylene/styrene) copolymer.
19. The radiology image sensor as claimed in claim 15 , wherein the soft plastic overmolded parts inside the casing are connected to soft plastic parts on the outside of the casing via bridges formed in openings provided in the hard plastic parts.
20. The radiology image sensor as claimed in claim 15 , wherein the soft plastic is an SEBS (styrene/ethylene-butylene/styrene) copolymer.