OPENING/CLOSING DEVICE

To provide an opening/closing cover configured not to break even when rotated in a fully opened state in an opening direction, and electronic apparatus including the opening/closing cover.SOLUTION: An opening/closing cover comprises a cover body 24 for openably closing a second opening 20a of an upper case 3, a rotation holding mechanism 25 for rotatably holding the cover body 24, and a release mechanism 26 for releasing the holding of the cover body 24 by the rotation holding mechanism 25. The rotation holding mechanism 25 includes a holding shaft 29 in the cover body 24 side, and a shaft hole 30a in the upper case 3 side to which the holding shaft 29 is rotatably fitted. The release mechanism 26 includes a notch part 32 for inserting and removing the holding shaft 29 from the shaft hole 30a, where the notch part 32 is formed at such a position as to be able to remove the holding shaft 29 from the shaft hole 30a when the cover body 24 is further rotated from the fully opened state in the opening direction. Consequently, when the cover body 24 is further rotated from the fully opened state in the opening direction, the release mechanism 26 can reliably and favorably release the holding of the cover body 24 by the rotation holding mechanism 25.SELECTED DRAWING: Figure 8 【課題】 全開状態で開方向に回転しても、破損することがない開閉カバーおよびそれを備えた電子機器を提供する。【解決手段】 上ケース３の第２開口部２０ａを開閉可能に塞ぐカバー本体２４と、このカバー本体２４を回転可能に保持する回転保持機構２５と、この回転保持機構２５によるカバー本体２４の保持を解除する解除機構２６と、を備え、回転保持機構２５は、カバー本体２４側の保持軸２９と、保持軸２９が回転可能に嵌合する上ケース３側の軸孔３０ａと、を備え、解除機構２６は、軸孔３０ａから保持軸２９を挿脱させる切欠き部３２を備え、切欠き部３２は、全開状態から更にカバー本体２４が開方向に回転された場合に、保持軸２９を軸孔３０ａから離脱可能な位置に形成されている。従って、カバー本体２４が全開状態から更に開方向に回転されると、解除機構２６によって回転保持機構２５によるカバー本体２４の保持を確実に且つ良好に解除させることができる。【選択図】 図８