Foxconn Technology Co., Ltd.

Hon Hai Precision Industry Co., Ltd.

Fu Zhun Precision Industry (shen Zhen) Co., Ltd.

Wun-Chang Shih

Ching-Hsing Huang

Hsien-Sheng Pei

Chien-Long Hong

Huan-Chao Lin

Cheng-Fang Hsiao

Wei-Ben Wang

Biao Wang

Ke Wang

Zhi-Ya Yang

Jen-Te Wang

Huai-Chao You

Cheng-Fa Weng

Yi-Chyng Fang

Da-Yi Wen

Fong-Tan Yu

Hsiang-Ho Huang

Chiung-Mei Wang

Chin-Jung Chen

Yun-Ming Hu

An exemplary camera module includes a lens mount, a lens unit, a magnet unit, a printed circuit board (PCB)-based Rogowski coil and a blade spring. The PCB-based Rogowski coil is fixed around the lens unit. The PCB-based Rogowski coil establishes an induced magnetic field when an electric current is applied thereto. The induced magnetic field interacts with the magnet unit to generate a magnetic force moving the lens unit telescopically. The blade spring includes a plurality of ribs. Each rib includes a moveable end connected with the lens unit and an opposite fixed end. The moveable end moves together with the lens unit with respect to the fixed end to cause the ribs to distort and generate an elastic force. The lens unit stops at a focal position when the magnetic force and the elastic force come to a balance.

Camera module

A cooling fan includes a fan housing () having a central tube () extending upwardly therefrom, a bearing () received in the central tube, a stator () mounted around the central tube, a rotor (), and a cover (). The bearing defines a bearing hole () therein. The rotor includes a hub (), a plurality of blades () extending outwardly from the hub, and a shaft () extending downwardly from the hub into the bearing hole of the bearing. The cover is mounted around the shaft and arranged on the bearing to seal a top end of the bearing. The cover is made of powders by sintering and thus has a plurality of pores to generate capillary force to absorb lubricant oil leaking out of the bearing.

Cooling fan

A motor structure with a built-in lens includes a motor (), and a lens unit () received in the motor and driven by the motor to telescopically move along an axial thereof. An internal thread () is formed on an inner surface of the motor. The lens unit includes an upper portion () and a lower portion (). An external thread () is formed on an outer surface of the lower portion of the lens unit to threadedly engage with the internal thread of the motor. A dust cover () is arranged on the upper portion of the lens unit and defines an opening () for the upper portion of the lens unit to move therethrough. The lower portion of the lens unit is limited in the cover so that the external thread is prevented from being exposed to the environment during movement of the lens unit.

Motor structure with built-in lens

A fluid dynamic bearing includes a bearing member () axially defining an inner bearing hole therein, and a spindle shaft () rotatably received in the bearing hole with a bearing clearance formed between an inner periphery of the bearing member and an outer periphery of the spindle shaft. Lubricant is filled in the bearing clearance. One of the inner periphery and the outer periphery comprises a bearing surface () with channels formed therein. The channels form a plurality of outer communication ends () at opposite sides of the bearing surface in the axial direction of the bearing member.

Fluid dynamic bearing

A motor structure with a built-in lens includes a lens mount (), a motor () received in the lens mount, and a lens unit () received in the lens mount and driven by the motor to telescopically move along an axial thereof. The motor includes a stator () and a rotor () being rotatably received in the stator. A narrow gap is defined between an inner surface of the stator and an outer surface of the rotor. A bearing layer () is filled in the gap of the motor to avoid swing of the rotor during rotation thereof. The lens unit threadedly engages with the rotor, whereby when the rotor rotates, the lens unit has a linearly telescopic movement relative to the lens mount.

A hydrodynamic bearing assembly () includes a bearing sleeve () defining a receiving chamber () therein, a bearing () received in the receiving chamber of the bearing sleeve, a sealing cover () mounted to an open end () of the bearing sleeve and including an enlarged section () adjacent to the bearing, a shaft () extending through the sealing cover and rotatably disposed in the bearing, on which a plurality lubricant pressure generating grooves are defined, and a lubricant retaining space () defined by the enlarged section of the sealing cover, an end of the bearing and the shaft for receiving lubricant therein. One of the sealing cover and the shaft defines a groove () therein, while the other one of the sealing cover and the shaft extends a flange () into the groove.

Hydrodynamic bearing assembly

A liquid pump () includes a top cover (), a back plate (), and a spacing member (). The spacing member is sandwiched between the top cover and the back plate, thereby dividing an interior of the liquid pump into a fluid chamber () and a receiving cavity () isolated and hermetical from the fluid chamber. The fluid chamber is disposed between the top cover and the spacing member for receiving therein a fluid dynamic bearing () and a rotor () which drives working fluid to enter and leave the liquid pump. The receiving cavity is disposed between the spacing member and the back plate for receiving therein a stator () which drives the rotor to rotate in respective to the bearing.

Liquid pump

A motor structure with a built-in lens includes a lens mount (), a motor () received in the lens mount, and a lens unit () received in the lens mount. The lens unit is drove by the motor to telescopically move along an axial thereof when a rotor () of the motor is rotated. A guiding member () arranged on an end of the motor for preventing an axial movement of the motor. The guiding member includes at least a leg () extending along an axial direction therefrom for guiding the axial movement of the lens unit.

A motor includes a support member () having a bearing housing () defining a bearing hole () therein, a stator assembly () mounted to an outer periphery of the support member, and a rotor assembly () having a rotary shaft () extending into the bearing hole and a permanent magnet () confronting the stator assembly. A bearing pattern () is formed on either of the bearing housing and the rotary shaft. The bearing pattern includes a number of first and second grooves () arranged circumferentially in an alternate fashion. Each of the first grooves is in communication with one adjacent second groove at an edge of the bearing pattern. Lubricating oil filled in the bearing pattern to establish dynamic pressure to separate the shaft and the bearing sleeve in radial direction when the shaft rotates.

Motor with fluid dynamic bearing and fan employing the motor

An ultrasonic motor includes a rotor () and a piezoelectric driving unit () for driving the rotor to rotate. The driving unit includes a piezoelectric film () and a vibration film () contacting with the rotor at an outer-periphery thereof. The ultrasonic motor further includes covers () having a plurality of poles () extending therefrom. Free ends of the poles fixedly connect with top and bottom sides of the vibration film, respectively.

Ultrasonic motor

A sensorless and brushless motor is disclosed including a stator, a rotor, a control circuit and an induction coil (). The stator includes a stator core () and a stator coil () wound around the stator core. The rotor includes a rotor magnet (). The control circuit is electrically connected with the stator coil for controlling a current energizing the stator coil. The induction coil is mounted to the stator and electrically connected with the control circuit. When the rotor rotates, the induction coil is capable of outputting a signal to the control circuit and in response to the signal, the control circuit is capable of changing a direction of the current flowing in the stator coil. Thus, the commutation control for the stator coil is performed by the induction coil and the conventional Hall sensor is eliminated.

Sensorless and brushless DC motor

A manufacturing tool () for forming a dynamic pressure groove () in an inner peripheral surface of a bearing sleeve () includes a tool shaft () for being rotated in a bore of the bearing sleeve while being moved in an axial direction thereof. Protrusions () are integrally and circumferentially arranged on an outer periphery of the tool shaft near a leading end () thereof. Machining tips () are integrally formed on outmost ends of the protrusions for machining the inner peripheral surface of the bearing sleeve to form the dynamic pressure groove therein.

Manufacturing tool for fluid dynamic bearing

A fluid dynamic bearing unit includes a bearing housing () axially defining therein a bearing hole (), a rotary shaft rotatably received in the bearing hole with a radial space formed between the rotary shaft and the bearing housing, and lubricant filled in the radial space. A ventilating path () is formed in a wall of the bearing housing to communicate a bottom of the bearing hole with an exterior of the bearing housing.

Fluid dynamic bearing unit

A fan motor includes an integral bearing member (') defining therein an axial inner bearing hole (&#x2032;) and forming a ventilating path (&#x2032;) in a wall portion thereof to communicate a bottom of the bearing hole with an exterior of the bearing member, a stator assembly () mounted to an outer periphery of the bearing member, and a rotor assembly () comprising a rotary shaft () extending into the bearing hole and a permanent magnet () confronting the stator assembly. Lubricating oil is filled between the rotary shaft and bearing member to establish dynamic pressure to separate the rotary shaft and the bearing member in radial direction when the rotary shaft rotates.

Fan motor with fluid dynamic bearing

A hydrodynamic bearing assembly comprises a bearing () defining a bearing hole () therein, a shaft () rotatably received in the bearing hole with a bearing clearance formed between a bearing surface of the bearing and an outer surface of the shaft, and a cover () attached to a top end of the bearing. The bearing clearance is filled with lubricant. A locking groove () is formed in an outer periphery of the shaft. The cover defines a through hole () receiving the shaft at the locking groove. Interlocking devices are formed on the cover and the bearing to join the cover and the bearing.

Growing community of inventors

Tu-Cheng, Taiwan

Wun-Chang Shih