Locking structure for cover covering handle seat
View Patent ↗A locking structure for a cover covering a handle seat may include a cover placed to cover a disk-shaped handle seat mounted on a surface of a door and may include a cover locking mechanism, a handle seat-side locking portion, and a rotation prevention mechanism. The cover locking mechanism may include a plurality of protrusion-shaped cover-side locking portions protruding inward at circumferential intervals at an opening end edge of the cover. The handle seat-side locking portion may include a groove portion and a hooking groove portion to which the cover is hooked when the cover-side locking portion is inserted when the cover placed is rotated. The rotation prevention mechanism may include a biased latch arranged at the groove portion. The latch may have an engagement portion projecting and retracting with respect to a bottom surface of the groove portion.
1. A locking structure for a cover covering a disk-shaped handle seat, the cover being placed to cover a front surface and a circumferential surface of the handle seat mounted opposite an inner side surface and an outer side surface of a door for supporting a square core equipped with a handle for actuating a latch mechanism arranged within the door, the locking structure comprising:
a cover locking mechanism including a plurality of protrusion-shaped cover-side locking portions protruding inward at circumferential intervals at an opening end edge of the cover, and a plurality of handle seat-side locking portions, each formed of a groove portion extending from a front surface to a rear surface, and through which each of the cover-side locking portions formed on the cover can be inserted when the cover is placed over the handle seat, and a hooking groove portion formed continuously and transversely to the groove portion in a rotation direction of the cover when the cover is placed over the handle seat, to which the cover is moved into a hooked state when the cover-side locking portions formed on the cover are inserted when the cover placed is rotated; and
a rotation prevention mechanism including a latch arranged to be movable back and forth and biased in a direction of an end along an axis from a center to an outer circumferential surface of the handle seat at a position of one of the groove portions forming the handle seat-side locking portion and having, at an end, an engagement portion projecting and retracting with respect to a bottom surface of the groove portion such that, when the cover is placed over the handle seat, the cover-side locking portion will enter the groove portion, engaging the engagement portion of the latch so as to retract the engagement portion, allowing further insertion of the cover-side locking portion so as to arrive at the hooked state, the engagement portion is biased back to the groove portion and contacts the cover-side locking portion erected on the cover preventing withdrawal of the cover from the handle seat.
2. The locking structure according to claim 1 , wherein, in a position where an inner surface of a body portion of the cover contacts the engagement portion of the rotation prevention mechanism, an inset hole for a tool for retracting the engagement portion into the handle seat is formed.
3. The locking structure according to claim 1 , wherein the rotation prevention mechanism arranged on the handle seat is arranged at a lower position.
4. The locking structure according to claim 2 , wherein the rotation prevention mechanism arranged on the handle seat is arranged at a lower position.