ELECTRONIC DEVICE INCLUDING DRIVING ASSEMBLY

The present disclosure relates to an electronic device including a driving assembly. The driving assembly according to an embodiment disclosed herein is accommodated in an electronic device, and comprises: a motor configured to generate torque and including a shaft that rotates about a rotation axis; a speed-reducing gear assembly connected to the motor; and a driving gear connected to the speed-reducing gear assembly. The speed-reducing gear assembly includes: a first central gear connected to the shaft and including first central gear teeth; a first peripheral gear including first peripheral gear teeth that engage with the first central gear teeth; and a ring gear that is formed in a ring shape about the rotation axis to surround the first peripheral gear and engages with the first peripheral gear. The tooth surfaces of the first central gear include a first end region and a second end region, which are regions at both ends of the tooth surfaces of the first central gear in the rotation axis direction, and the first end region may have a bend formed in a direction in which the tooth thickness of the first central gear teeth decreases. The tooth surfaces of the first peripheral gear may include a third end region corresponding to the first end region and a fourth end region corresponding to the second end region, and the fourth end region may have a bend formed in a direction in which the tooth thickness of the first peripheral gear teeth decreases.