Temporary placement structure for sub cover

A temporary holding structure for a sub-cover on a cover body, wherein the cover body includes a main cover, which includes an opening and a first engagement portion located on a rim of the opening, and the sub-cover, which includes a second engagement portion engaged with the first engagement portion when the sub-cover closes the opening to keep the opening closed, the temporary holding structure comprising:

• a groove formation portion that defines an insertion groove, wherein the groove formation portion is located in each of two opposing inner sides of the opening;
• and
• two coaxially arranged engagement shafts respectively located at upper sides of two side portions of the sub-cover that oppose the two inner sides, wherein the engagement shafts are insertable into the insertion grooves from an outer lower side and have a thickness that is larger than a groove width of the insertion grooves, wherein
• the groove formation portions are elastic and deformable to allow insertion of the engagement shafts when the engagement shafts are inserted from the outer lower side, the groove formation portions elastically return to their original forms after insertion of the engagement shafts to engage the engagement shafts and restrict separation of the engagement shafts in a reverse direction, and the groove formation portions pivotally support the sub-cover to allow the sub-cover to open while engaged with the engagement shafts, and
• the main cover covers from below an electronic device fixed to a windshield glass.