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    Cutting machine
    3.
    发明授权
    Cutting machine 有权

    公开(公告)号：US10888938B2

    公开(公告)日：2021-01-12

    申请号：US16408082

    申请日：2019-05-09

    Applicant: Koki Holdings Co., Ltd.

    Inventor： Tomomasa Nishikawa

    IPC: B23D45/04 ,  B23D47/00 ,  B25F5/02 ,  B25F5/00 ,  B27B5/20 ,  B27B9/00

    Abstract: To provide a cutting machine that suppresses swinging of the cutting portion when the battery pack is attached or detached, the cutting machine includes a cutting portion, a base, and a swing support mechanism. The cutting portion includes: a motor, a motor housing accommodating the motor, an output shaft configured to be rotated upon rotation of the motor, a battery pack serving as a power source of the motor, and a battery pack attaching portion including a pair of rail portions with which the battery pack is engageable, where a cutting blade is configured to be detachably attached to the output shaft. The base has a contact surface on which a workpiece is configured to be placed. The swing support mechanism is connected to the base and the cutting portion and includes a swing shaft extending in parallel to the output shaft. The swing support mechanism supporting the cutting portion such that the cutting portion is swingable about the swing shaft between a top dead center and a bottom dead center in a direction parallel to a side surface of the cutting blade. The pair of rail portions extend in a direction crossing the side surface of the cutting blade.

    Battery pack, power tool, and battery pack and power tool set
    5.
    发明授权
    Battery pack, power tool, and battery pack and power tool set 有权

    公开(公告)号：US11411277B2

    公开(公告)日：2022-08-09

    申请号：US16095945

    申请日：2017-03-31

    Applicant: Koki Holdings Co., Ltd.

    Inventor： Tomomasa Nishikawa ,  Satoru Matsuno ,  Mitsutaka Sakamoto

    IPC: H01M2/10 ,  H01M50/213 ,  B25F5/02 ,  B23D45/16 ,  B25B21/00

    Abstract: The purpose of the invention is to provide a battery pack and a power tool on which the same can be detachably mounted such that compatibility can be ensured even if the dimensions of the battery cells therefor are changed, as well as a battery pack and power tool set. A second battery pack is provided with second battery cells, a second case which houses the second battery cells, a second latch portion for mounting the second battery pack to the power tool, and a second latch operating portion. The second battery pack has a larger case width than that of a specified battery pack for housing battery cells shorter than the second battery cells. However, as the rail width is the same, the second battery pack can be detachably mounted to the power tool in place of the specified battery pack.

    Power tool
    7.
    再颁专利
    Power tool 有权

    公开(公告)号：USRE49414E1

    公开(公告)日：2023-02-14

    申请号：US17306965

    申请日：2021-05-04

    Applicant: Koki Holdings Co., Ltd.

    Inventor： Akira Matsushita ,  Tomomasa Nishikawa ,  Noriyuki Horie ,  Masahiro Fujiwara

    IPC: B25F5/00 ,  B24B23/02

    Abstract: A power tool has a fan guide for straightening the flow of cooling air generated by a fan, wherein the branching passages through are provided for causing a portion of the cooling air drawn into the fan from a ventilation hole to diverge from a flow toward an exhaust port formed on a bearing guide side, and the portion of the cooling air flows toward an inlet and thereby circulates inside a housing. The branching passages through provided to the fan guide are formed so as to be inclined in the same direction as a circumferential direction so that air path resistance during actual operation (in an intermediate-speed region) does not increase.

    Work device
    8.
    发明授权
    Work device 有权

    公开(公告)号：US11469699B2

    公开(公告)日：2022-10-11

    申请号：US16956608

    申请日：2019-02-22

    Applicant: Koki Holdings Co., Ltd.

    Inventor： Yuki Ishikawa ,  Hayato Yamaguchi ,  Tomomasa Nishikawa ,  Masashi Takehisa ,  Tatsuya Ito

    IPC: H02P23/00 ,  B25F5/02 ,  B25B21/02

    Abstract: In the work device that has a self-holding circuit (61) maintaining power supply from a power supply circuit (12) by output from a microcomputer (40) and has a structure in which stopping output to the self-holding circuit (61) causes interruption of power supply from the power supply circuit (12) to the microcomputer (40), the firmware of the microcomputer (40) is made to be rewritable and a power holding unit (condenser C1) for temporarily continuing power supply to the microcomputer (40) is provided, thereby realizing a so-called “off-delay timer function” for restarting the microcomputer (40). This configuration enables maintenance of power to the microcomputer (40) after update of the firmware even in a work device that cannot be restarted once power has been turned off unless trigger operation is performed, thereby enabling automatic restart of the microcomputer 40 after resetting is enabled.

    Electric tool
    9.
    发明授权
    Electric tool 有权

    公开(公告)号：US11418094B2

    公开(公告)日：2022-08-16

    申请号：US16499748

    申请日：2018-02-23

    Applicant: KOKI HOLDINGS CO., LTD.

    Inventor： Akira Matsushita ,  Tomomasa Nishikawa ,  Yuta Noguchi ,  Takahiro Hirai

    IPC: H02K11/33 ,  H02K11/215 ,  B25F5/00 ,  H02K7/14 ,  H02K9/06 ,  H02K21/16 ,  H05K1/02 ,  H05K1/18 ,  H05K7/20 ,  B25D17/20

    Abstract: Providing an electric tool with excellent cooling efficiency. An electric tool includes: a housing 2; a motor 3; a fan 34; a sensing portion 41; a switching portion 42; and a circuit board 40. The motor 3 is accommodated in the housing 2. The motor 3 includes a stator 33, a rotor 32, and a rotating shaft 31. The rotor 32 is rotatable relative to the stator 33. The rotating shaft 31 is rotatable together with the rotor 32. The fan 34 is configured to generate a cooling air flow inside the housing 2. The sensing portion 41 is configured to detect a rotated position of the rotor 32. The switching portion 41 controls a rotation of the rotor 32. The sensing portion 41 and the switching portion 42 are mounted on the circuit board 40. The stator 33, the fan 34, the sensing portion 41, the switching portion 42, and the circuit board 40 are arranged in the housing 2 along an axial direction of the rotor 32 in the order of the fan 34, the sensing portion 41, the circuit board 40, the switching portion 42, and the stator 33.

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