公开(公告)号：US12300833B2

公开(公告)日：2025-05-13

申请号：US17036356

申请日：2020-09-29

Applicant: MAKITA CORPORATION

Inventor： Tatsuya Nagahama ,  Kazuya Tanaka

IPC: H01M10/42 ,  H01M50/10 ,  H01M50/213 ,  H01M50/30 ,  H01M50/543 ,  H01M50/572

Abstract: A battery pack (2; 402; 602) includes an outer case (12; 412; 612), which comprises an upper-part case (14; 414) and a lower-part case (15; 415) fixed to the upper-part case (14; 414), and a cell case (80; 480; 780; 980), which is housed in the outer case (12; 412; 612). An engaging part (30) is provided on one of the upper-part case (14; 414) and the cell case (80; 480; 780; 980). An engaged part (110), with which the engaging part (30) engages, is provided on or in the other of the upper-part case (14; 414) and the cell case (80; 480; 780; 980).

公开(公告)号：US12107449B2

公开(公告)日：2024-10-01

申请号：US17522954

申请日：2021-11-10

Applicant: MAKITA CORPORATION

Inventor： Tatsuya Nagahama

IPC: H02J7/00 ,  B25F5/02 ,  H01M50/213 ,  H01M50/244 ,  H01M50/247 ,  H01M50/296 ,  H01M50/543 ,  H01M50/298

CPC classification number: H02J7/0045 ,  B25F5/02 ,  H01M50/213 ,  H01M50/244 ,  H01M50/247 ,  H01M50/296 ,  H01M50/543 ,  H02J7/0013 ,  H01M50/298 ,  H01M2220/30

Abstract: A detachable DC power source includes: a reference surface extending in front-rear and left-right directions; support walls protruding upward from opposite ends of the reference surface and extending in the front-rear direction; battery-side rails protruding outward in the left-right direction from the upper ends of the pair of support walls and extending in the front-rear direction; and a first battery-side distinguishing region disposed between the support walls in the left-right direction and at a connection location between the reference surface and one of the support walls. A first battery-side distinguishing member is provided in the first battery-side distinguishing region and is directly connected to the one the support walls and to the reference surface. The detachable DC power source may be used to power an electrical device having a first device distinguishing part capable of receiving the first battery distinguishing member.

公开(公告)号：US10886816B2

公开(公告)日：2021-01-05

申请号：US15874421

申请日：2018-01-18

Applicant: MAKITA CORPORATION

Inventor： Toan Van Doan ,  Motohiro Omura ,  Tatsuya Nagahama

IPC: H02K7/08 ,  H02K7/14 ,  H02K11/215 ,  H02K5/16 ,  H02K21/14 ,  B25F5/00 ,  H02K3/52 ,  B25D17/00 ,  B25D16/00 ,  B25F5/02

Abstract: A power tool including a brushless motor having a sensor circuit board has higher durability. The power tool includes a housing, a brushless motor including a rotor having a rotational shaft, a stator, and a sensor circuit board fixed to the stator and having a rotation detecting element that detects rotation of the rotor, and receiving the rotational shaft through the sensor circuit board, and a bearing held in the housing and supporting the rotational shaft. The bearing is located to overlap the rotation detecting element in an axial direction of the rotational shaft.

公开(公告)号：US11695182B2

公开(公告)日：2023-07-04

申请号：US17036411

申请日：2020-09-29

Applicant: MAKITA CORPORATION

Inventor： Akira Naito ,  Tatsuya Nagahama

IPC: H01M50/213 ,  H01M10/42 ,  H01M50/10 ,  H01M50/543 ,  H01M50/572 ,  H01M50/30

CPC classification number: H01M50/213 ,  H01M10/425 ,  H01M50/10 ,  H01M50/394 ,  H01M50/543 ,  H01M50/572 ,  H01M2220/30

Abstract: A battery pack (2; 602) includes: an outer case (12; 612); one or more battery cells (90a-90j); and a cell case (80), which is housed in the outer case (12; 612) and houses the battery cell(s) (90a-90j). The outer case (12; 612) has: an upper surface (wall) (14b), in which a terminal-opening part (22a) for exposing a terminal (102) is provided; a bottom wall (15e); and a plurality of side surfaces (walls) (15a-15d) extending upward from the bottom wall (15e). The battery cell(s) (90a-90j) is (are) disposed parallel to the bottom wall (15e). An opening (40a-40j) is provided in a specific side surface (15b, 15d), from among the plurality of side surfaces (15a-15d), that faces an end surface of the battery cell(s) (90a-90j) in a longitudinal direction.

公开(公告)号：USD972497S1

公开(公告)日：2022-12-13

申请号：US29775877

申请日：2021-03-25

Applicant: MAKITA CORPORATION

Designer： Tomonori Kawase ,  Tatsuya Nagahama ,  Kazuya Tanaka

公开(公告)号：US10749405B2

公开(公告)日：2020-08-18

申请号：US15978467

申请日：2018-05-14

Applicant: MAKITA CORPORATION

Inventor： Tatsuya Nagahama

IPC: H02K5/22 ,  H02K7/14 ,  B25D11/00 ,  H02K11/21 ,  B25D16/00 ,  H02K29/06 ,  H02K3/50 ,  B25F5/02 ,  B25F5/00 ,  B25D17/00 ,  H02K9/06

Abstract: Provided is a power tool whereby reduction is made for time-consuming effort and cost required in trouble, inspection and so forth related to a motor. A hammer drill, which is an example of a power tool, includes a plurality of coils, an insulator holding the plurality of coils, a terminal unit that is electrically connected to the plurality of coils and is attached to the insulator, a rotor that is rotatable with respect to the insulator, and a sensor board that detects rotation of the rotor and is attached to the terminal unit. The sensor board is detachable from the terminal unit, while the terminal unit is attached to the insulator.

公开(公告)号：US10608500B2

公开(公告)日：2020-03-31

申请号：US15392747

申请日：2016-12-28

Applicant: MAKITA CORPORATION

Inventor： Tatsuya Nagahama

IPC: H02K7/14 ,  H02K3/52 ,  H02K11/215 ,  H02P6/17 ,  B25F5/00 ,  H01M2/02 ,  H01M2/30 ,  H01M10/42 ,  H01M10/48 ,  H02K1/12 ,  H02K5/22 ,  H02K9/06 ,  H02K11/21

Abstract: In an impact driver, a stator is made compact to accommodate a brushless motor in a reduced space, thereby keeping a housing compact, and productivity and handleability are also improved. The impact driver includes a brushless motor including a stator in which coils are wound and that includes fusing terminals at which the coils are fused, and a rotor capable of rotating relative to the stator, lead wires for supplying power to the coils, respectively, and lead wire-side terminals to which the lead wires are connected, respectively. The fusing terminals and the lead wire-side terminals are connected to each other at a predetermined position (a connection plate) in a circumferential direction of the stator by means of screws.

公开(公告)号：US10396573B2

公开(公告)日：2019-08-27

申请号：US15689725

申请日：2017-08-29

Applicant: MAKITA CORPORATION

Inventor： Nobuyasu Furui ,  Hitoshi Suzuki ,  Masaaki Fukumoto ,  Takuya Umemura ,  Kosuke Ito ,  Hitoshi Sengiku ,  Shuji Yoshikawa ,  Tatsuya Nagahama

IPC: H02J7/00 ,  B25F5/02 ,  B25F3/00 ,  B25F5/00 ,  G05B13/02 ,  G08C17/02

Abstract: A method for recharging a battery pack (40; 40′) includes attaching a portable charger (120) to a user, which portable charger comprises or is attached to a self-contained power supply (130, 140) and wherein a first charging port (132, 146) of the portable charger is disposed, e.g., on a belt (144) worn by the user, hanging the battery pack on the belt while the battery pack is physically engaged and in electrical communication with a power tool (10; 10′), and initiating a transfer of power from the charger to the battery pack when the first charging port is at least proximal to a second charging port (85, 148) that is in electrical communication with at least one battery cell (50) of the battery pack. A portable charging system capable of performing this method, as well as an adapter for use in performing this method, are also disclosed.

公开(公告)号：US20180205288A1

公开(公告)日：2018-07-19

申请号：US15919615

申请日：2018-03-13

Applicant: MAKITA CORPORATION

Inventor： Tatsuya Nagahama ,  Junya lnuzuka ,  Takashi Momose

IPC: H02K7/14 ,  H02K11/27 ,  H02K11/215 ,  H02K3/52 ,  H02K7/116 ,  H02K29/08 ,  H02K3/28 ,  H02K5/22

CPC classification number: H02K7/145 ,  H02K3/28 ,  H02K3/522 ,  H02K5/225 ,  H02K7/116 ,  H02K11/215 ,  H02K11/27 ,  H02K29/08 ,  H02K2203/03 ,  H02K2203/09

Abstract: A power tool (1; 90) includes a motor (17) having a stator (18) and a rotor (19). The stator (18) includes front and rear insulators (21, 22) respectively disposed forward and rearward of a stator core (20) in an axial direction thereof. At least six coils (23) are respectively wound on the stator (18) such that the coils (23) are wound through the front and rear insulators (21, 22). Winding wires (23a) respectively electrically connect circumferentially-adjacent pairs of the coils (23). A short circuiting device (25) short circuits respective pairs of windings (23a) that are located diagonally or diametrically across from one another.

公开(公告)号：US20170126038A1

公开(公告)日：2017-05-04

申请号：US15402584

申请日：2017-01-10

Applicant: MAKITA CORPORATION

Inventor： Shuji Yoshikawa ,  Tatsuya Nagahama ,  Nobuyasu FURUI ,  Hitoshi Suzuki ,  Masaaki FUKUMOTO ,  Takuya UMEMURA ,  Kosuke ITO

IPC: H02J7/00 ,  A41F9/00 ,  A45F3/14 ,  B25F5/02

CPC classification number: H02J7/0044 ,  A41F9/002 ,  A45F3/14 ,  A45F2003/142 ,  A45F2003/144 ,  A45F2003/146 ,  B25F5/02 ,  H02J7/0027 ,  H02J7/0042 ,  H02J7/0054

Abstract: A charger for a hand-held power tool includes a power source interface, a charger base and a charging cradle rotatably supported on the charger base. The rotatable charging cradle includes at least two charging output terminals electrically connected to the power source interface. A power tool system includes the charger and the hand-held power tool. A method of charging the power tool system includes contacting charging input terminals of the power tool with the charging output terminals, rotating the charging cradle and the power tool relative to the charging base and supplying charging current to at least one battery cell while the charging cradle and the power tool are allowed to freely swing relative to the charging base.