摘要：

《民法典》第192条是诉讼时效届满效力的一般规则，第193条是职权禁用规则。应在“抗辩权发生主义”的框架下，确定援引时效抗辩权的场合、主体、形式及效力，该援引行为亦受到诚实信用原则的限制。时效届满后义务人同意履行的，构成以明示形式放弃时效抗辩权的行为，应在此前提下确定该弃权行为的形式和效力。时效届满后义务人自愿履行的，属于具有合法原因的履行行为而不构成不当得利，应在此前提下确定自愿履行的形式和效力。

关键词: 诉讼时效, 抗辩权发生主义, 职权禁用规则, 援引行为, 同意履行, 自愿履行

Abstract:

Article 192 of the Civil Code is the general rule the effect of expiration of extinctive prescription，and article 193 is the prohibition rules of authority. The occasion，subject，form and effect of invoking the right to defense of extinctive prescription should be determined under the framework of“doctrine of right of defense”，the invoking behavior is also restricted by the principle of good faith. If the obligor agrees to perform after the expiration of the limitation period，it constitutes an act of waiving the right to defense of extinctive prescription in an express form，the form and effect of the waiver should be determined on this premise. If the obligor has performed the obligations voluntarily after the expiration of the limitation period，it belongs to the performance with legal reasons and does not constitute unjust enrichment，the form and effect of voluntary performance should be determined on this premise.

Key words: Extinctive Prescription, Doctrine of Right of Defense, Prohibition Rules of Authority, Act of invoking, Consent to Performance, Voluntary Performance