Power tool

The power tool design separates earth and electrical lead wires using a partition in the housing, addressing malfunctions and wear issues while maintaining compactness, ensuring reliable operation near high-voltage sources.

JP2026031154APending Publication Date: 2026-02-24MAKITA CORP
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Patent Information

Application Number
JP2024134500
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-08-09
Publication Date
2026-02-24

AI Technical Summary

Technical Problem

Power tools with electrical components near high-voltage power lines face malfunctions due to electrical noise, and routing electrical lead wires along the housing surface risks wear and contact with screws or terminals, hindering compactness and increasing the risk of screw detachment.

Method used

The power tool design includes a metal housing with a resin cover that separates electrical lead wires from earth wire connections using a partition, allowing the earth wire to be connected between the front and rear surfaces without increasing length, and incorporating a partition to prevent contact and wear.

Benefits of technology

This configuration prevents contact between earth and electrical lead wires, maintaining tool compactness and preventing wear and screw detachment, even under vibration, thus ensuring reliable operation near high-voltage sources.

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  • Figure 2026031154000001_ABST
    Figure 2026031154000001_ABST
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Abstract

To effectively prevent falling-off of a screw and abrasion of both lead wires, without hindering compactification, even if a lead wire for grounding and a lead wire for an electric material are arranged.SOLUTION: The rechargeable impact wrench 1 includes a motor 4, a striking unit 6, a hammer case 22 made of metal and housing the striking unit 6, a hammer case cover 23 made of resin and covering a front portion of the hammer case 22, a light unit 8 provided in the front portion of the hammer case 22, and a battery mounting unit 115 on which a battery pack 14 serving as a power supply can be mounted and which has positive and negative terminals 116116 and to which the mounted battery pack 14 is electrically connected. A grounding part 54 which is a screwing part of a grounding lead wire 56 connected to a negative terminal 116 of the battery mounting part 115 is formed on a lower surface of the hammer case 22, and a partition part 60 for partitioning between a light lead wire 42 connected to the light unit 8 and the grounding part 54 is formed on the hammer case cover 23.SELECTED DRAWING: Figure 2
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Citation Information

Patent Citations

  • Impact tool

    JP2024079576A