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Patent Searching and Data


Title:
MINIATURE DIRECT CURRENT MOTOR
Document Type and Number:
WIPO Patent Application WO/2019/056594
Kind Code:
A1
Abstract:
A miniature direct current motor (10), comprising a lower cover (20), a receiving base (30), an outer housing (40) installed on the receiving base (30), a support frame (50) installed within the outer housing (40), four permanent magnets (60) and a coil (70) installed on the support frame (50), an output shaft (80) installed on the receiving base (30) and extending beyond the outer housing (40), and an iron core (90) installed on the output shaft (80). The permanent magnets (60) are grouped into pairs, and each of the pairs is arranged symmetrically at side surfaces of the support frame (50). Two of the permanent magnets (60) on surfaces of a same side of the support frame (50) have lines connecting centers thereof to an axis of the output shaft (80) forming an included angle of 50-60°. The iron core (90) has a sleeve connection portion (91) sleeved on the output shaft (80) and swing arms (92) symmetrically provided on two sides of the sleeve connection portion (91). The swing arms (92) are arranged opposite to the permanent magnets (60). The permanent magnets (60) in the miniature direct current motor (10) generate a large auxiliary force, have a sufficient travel distance under the action of a force, and have a large swing amplitude. During a time gap for a change in the direction of an electric current, a reset spring is not required to compensate for insufficient driving force during circuit switching, and an inverter is not needed in the structure to achieve the change in direction of the electric current. The present invention has a simple structure and generates little noise.

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Inventors:
LI, Jinzhi (1 Building, Backside of Stone Center Xiaoxiang Community Industrial Estate, Wanjiang Distric, Dongguan Guangdong 0, 523000, CN)
Application Number:
CN2017/115885
Publication Date:
March 28, 2019
Filing Date:
December 13, 2017
Export Citation:
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Assignee:
DONGGUAN LEBOND ELECTRONIC TECHNOLOGY CO., LTD. (1 Building, Backside of Stone Center Xiaoxiang Community Industrial Estate, Wanjiang Distric, Dongguan Guangdong 0, 523000, CN)
International Classes:
H02K33/16
Foreign References:
CN107394982A2017-11-24
CN207234641U2018-04-13
CN203815640U2014-09-10
CN206499540U2017-09-19
CN205657574U2016-10-19
CN101554342A2009-10-14
US20020084707A12002-07-04
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (Room 4501, No. 6 Zhujiang East Road Tianhe District, Guangzhou, Guangdong 3, 510623, CN)
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