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:
Apr. 21, 2025
Filed:
Jan. 30, 2020
Koki Holdings Co., Ltd., Tokyo, JP;
Mikihiro Kataoka, Ibaraki, JP;
Naoto Ichihashi, Ibaraki, JP;
Koki Holdings Co., Ltd., Tokyo, JP;
Abstract
A charging device () includes: a case () to which a battery pack is detachably attached; a charging circuit portion that charges the battery pack; a fan () for cooling; a first opening portion () for intake; and a second opening portion () for exhaust. An air path from the fan () to the second opening portion () is connected by an air path forming portion () having a long and curved passage length. The air path forming portion () narrows down at a point in the middle to achieve a positional relationship in which the fan () cannot be seen from the second opening portion (), thereby making it difficult for operating noise of the fan () to leak to the outside. The air path forming portion () is formed using a wall surface of the case (), an outer air-guiding wall (), and an inner air-guiding wall ().