Abstract: A connection structure includes an elastic member and a knob. The elastic member includes a bottom portion and an elastic piece extending from the bottom portion and including a free end not contacting the bottom portion. The free end includes a first protrusion extending outward along a radial direction of the elastic member and a second protrusion extending inward along the radial direction of the elastic member. The knob is configured to engage with the elastic member and includes a fitting slot formed at an inner wall of the knob. The fitting slot includes a first portion and a second portion in a circumferential direction of the knob for engaging with the first protrusion of the elastic piece. A depth of the first portion is smaller than a depth of the second portion.

Abstract: The present disclosure provides an Unmanned Ariel Vehicle (UAV). The UAV includes a fuselage including a housing, a core control board disposed in the housing, and a battery, the housing including a battery compartment, and the battery being disposed in the battery compartment; an arm disposed on the fuselage; and a power assembly disposed on the arm. The core control board is disposed above the battery, a payload receiving cavity is disposed at a front lower end of the housing, a rear-bottom view component is disposed at a rear end of the housing and electrically connected to the core control board, and the battery compartment is disposed at a middle position under the housing.

Abstract: A connection structure includes an elastic member and a knob. The elastic member includes a bottom portion and an elastic piece extending from the bottom portion and including a free end not contacting the bottom portion. The free end includes a first protrusion extending outward along a radial direction of the elastic member and a second protrusion extending inward along the radial direction of the elastic member. The knob is configured to engage with the elastic member and includes a fitting slot formed at an inner wall of the knob. The fitting slot includes a first portion and a second portion in a circumferential direction of the knob for engaging with the first protrusion of the elastic piece. A depth of the first portion is smaller than a depth of the second portion.

Abstract: The present invention provides an image forming apparatus and a photoreceptor cartridge usable in the image forming apparatus. The image forming apparatus comprises a chamber part, right and left side walls, a first guide groove, a second guide groove, an accessory plate that is a first operation unit, and a writing unit that is a second operation unit. The photoreceptor cartridge comprises a first guide axle, a second guide axle, a first surface and a second surface. A distance between a groove opening of the first guide groove and the accessory plate is shorter than a distance between the second guide axle and the first surface, and a distance between a groove opening of the second guide groove and the writing unit is shorter than a distance between the first guide axle and the second surface.

Abstract: The present invention provides an image forming apparatus and a photoreceptor cartridge usable in the image forming apparatus. The image forming apparatus comprises a chamber part, right and left side walls, a first guide groove, a second guide groove, an accessory plate that is a first operation unit, and a writing unit that is a second operation unit. The photoreceptor cartridge comprises a first guide axle, a second guide axle, a first surface and a second surface. A distance between a groove opening of the first guide groove and the accessory plate is shorter than a distance between the second guide axle and the first surface, and a distance between a groove opening of the second guide groove and the writing unit is shorter than a distance between the first guide axle and the second surface.