Locking device and cake mold

A locking device, comprising:

• a first connecting member, comprising a first end portion and a second end portion which are oppositely disposed, wherein the first end portion is used for clamping a top end of a ring body;
• a second connecting member, comprising a third end portion and a fourth end portion which are oppositely disposed, wherein the third end portion is used for clamping a bottom end of the ring body;
• a first locking member, comprising a fifth end portion and a sixth end portion which are oppositely disposed, wherein the fifth end portion is rotatably connected to the fourth end portion, the fifth end portion is connected to the second end portion, the fifth end portion can rotate around an axis of rotation relative to the fourth end portion, and the sixth end portion is provided with a first locking portion;
• and
• a second locking member fixed to the second connecting member, wherein the second locking member is provided with a second locking portion,
• wherein when the fifth end portion rotates to a first position relative to the fourth end portion, the first locking portion and the second locking portion are locked, and the fifth end portion applies a pulling force to the second end portion and the fourth end portion, respectively, to drive the first end portion to get close to the third end portion.