The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 2017
Filed:
Sep. 09, 2015
Mitsuba Corporation, Kiryu-shi, Gunma, JP;
Mitsuba Corporation, Kiryu-shi, Gunma, JP;
Abstract
It is an object of the present invention is to smoothen air flow at the time of vibrations of the diaphragm, and to suppress variations in acoustic characteristics. Since the inclined surfaceof the washer, which forms the air flow channel, is an inclined surface having a diameter gradually reduced with distance from the diaphragmin the axial direction of the movable iron core, compared with the conventional step-shaped air flow channel having vertical surfaces, air flow in the air flow channelcan be smoothened. Therefore, disturbance in air flow is not easily generated in the air flow channel, and variations in acoustic characteristics of the horn apparatuscan be suppressed.