| 摘要 |
Provided is a thin key sheet whose rigidity is improved lest the key sheet is curved easily when the casing of a portable electronic apparatus etc. mounting the key sheet is erected or tilted down, so that key tops are not exfoliated easily and base material is hardly destroyed even when an excessive force acts. Further provided is the manufacturing method of the key sheet. The key sheet (10) has the key tops (12) and a UV curing resin sheet (20) as a pressing element layer having pressing elements (28) which transmit pressurizing force from the key tops (12) to metal domes (30), and reinforcement ribs (34) for improving the rigidity of the key sheet (10). Between the key tops (12) and the UV curing resin sheet (20), a urethane sheet (16) and a PET sheet (18) are provided as an intermediate layer. The manufacturing method of the key sheet (10) comprises a step of integrally molding the UV curing resin sheet (20) having the pressing elements (28) and the reinforcement ribs (34) by filling a die with a liquid UV curing resin.
|
