Abstract: A fan includes an impeller rotating on a central axis, an impeller housing, a motor located on one side in an axial direction of the impeller and driving the impeller to rotate, and a motor housing. The impeller housing is provided with an air inlet. The fan further includes a pre-pressing portion expanding radially inward from an edge of the air inlet. The pre-pressing portion includes a pressing portion located on another side in the axial direction of the impeller and pressing, from the another side in the axial direction, an end portion of the impeller on the another side in the axial direction, and at least two connection portions connected between an outer periphery of the pressing portion and the edge of the air inlet. The connection portions are disposed obliquely with respect to the axial direction.

Abstract: A fan includes an impeller rotating on a central axis, an impeller housing, a motor located on one side in an axial direction of the impeller and driving the impeller to rotate, and a motor housing. The impeller housing is provided with an air inlet. The fan further includes a pre-pressing portion expanding radially inward from an edge of the air inlet. The pre-pressing portion includes a pressing portion located on another side in the axial direction of the impeller and pressing, from the another side in the axial direction, an end portion of the impeller on the another side in the axial direction, and at least two connection portions connected between an outer periphery of the pressing portion and the edge of the air inlet. The connection portions are disposed obliquely with respect to the axial direction.

Abstract: A gear assembly includes an upper cover and a lower cover, a stator fixed to the lower cover, a rotor opposite to the stator and including a rotary shaft and magnet, a main gear fixed to the rotary shaft and rotating along with the rotary shaft, and a helical gear engaged with the main gear, the main gear and the helical gear being both received in the cover member, the upper cover including a boss portion with a recess receiving a tip of the rotary shaft. The rotor is axially movable and when the rotary shaft stops rotating, the tip of the rotary shaft is in the recess of the boss portion, and when the rotary shaft rotates, the helical gear applies a force on the main gear, and the tip of the rotary shaft is disengaged from the recess of the boss portion.

Abstract: A brushless motor and an electronic product having the brushless motor are provided. The brushless motor includes: a shaft, a stator part disposed on the periphery of the shaft, a rotor part disposed on the periphery of the stator part, a bearing part, and a housing. The housing includes: an upper plate part located on an axial side of the rotor part, a tubular part extending in an axial direction from a radial outer side of the upper plate part, and a lower plate part located on the other axial side of the rotor part. An accommodating part is formed around the shaft on a radial inner side of the upper plate part, and a sealing component is arranged between the accommodating part and the shaft.

Abstract: A gear assembly includes an upper cover and a lower cover, a stator fixed to the lower cover, a rotor opposite to the stator and including a rotary shaft and magnet, a main gear fixed to the rotary shaft and rotating along with the rotary shaft, and a helical gear engaged with the main gear, the main gear and the helical gear being both received in the cover member, the upper cover including a boss portion with a recess receiving a tip of the rotary shaft. The rotor is axially movable and when the rotary shaft stops rotating, the tip of the rotary shaft is in the recess of the boss portion, and when the rotary shaft rotates, the helical gear applies a force on the main gear, and the tip of the rotary shaft is disengaged from the recess of the boss portion.

Abstract: A motor includes a rotary and a stationary portion. The rotary portion includes a shaft, a rotor holder, and a rotor magnet. The stationary portion includes a bearing member, a housing, a stator, a circuit board directly or indirectly held in the housing, positioned axially below the rotor holder, and a circuit board support portion provided together with the housing as a monolithic member or directly or indirectly held in the housing, directly or indirectly attached to a device body. The circuit board includes first and second circuit boards positioned respectively axially above and below the circuit board support portion. The first and second circuit boards are electrically connected via a connecting member, and partially overlap. An attachment portion attaching the motor to a device is positioned on an outer peripheral surface of the circuit board support portion.

Abstract: An outer-rotor motor includes a stationary portion, a rotating portion, and a bearing mechanism arranged to support the rotating portion such that the rotating portion is rotatable about a central axis extending in a vertical direction with respect to the stationary portion. The stationary portion includes a stator, a mounting plate, and a circuit board. The rotating portion includes a shaft, a rotor holder, and a rotor magnet. The mounting plate includes a projecting portion arranged to project radially. The outer-rotor-motor further includes a guide structure connected with the projecting portion. The guide structure is arranged to extend axially, radially outside the rotor holder. A leadwire is electrically connected to the circuit board, and is guided along the guide structure. Provision of the guide structure, which is arranged to guide the leadwire radially outwardly of the rotor holder, contributes to preventing a contact between the leadwire and the rotor holder.

Abstract: A motor includes a rotary and a stationary portion. The rotary portion includes a shaft, a rotor holder, and a rotor magnet. The stationary portion includes a bearing member, a housing, a stator, a circuit board directly or indirectly held in the housing, positioned axially below the rotor holder, and a circuit board support portion provided together with the housing as a monolithic member or directly or indirectly held in the housing, directly or indirectly attached to a device body. The circuit board includes first and second circuit boards positioned respectively axially above and below the circuit board support portion. The first and second circuit boards are electrically connected via a connecting member, and partially overlap. An attachment portion attaching the motor to a device is positioned on an outer peripheral surface of the circuit board support portion.

Abstract: An outer-rotor motor includes a stationary portion, a rotating portion, and a bearing mechanism arranged to support the rotating portion such that the rotating portion is rotatable about a central axis extending in a vertical direction with respect to the stationary portion. The stationary portion includes a stator, a mounting plate, and a circuit board. The rotating portion includes a shaft, a rotor holder, and a rotor magnet. The mounting plate includes a projecting portion arranged to project radially. The outer-rotor-motor further includes a guide structure connected with the projecting portion. The guide structure is arranged to extend axially, radially outside the rotor holder. A leadwire is electrically connected to the circuit board, and is guided along the guide structure. Provision of the guide structure, which is arranged to guide the leadwire radially outwardly of the rotor holder, contributes to preventing a contact between the leadwire and the rotor holder.