Striking Tool Handle Elastic Mounting for Drop Impact Protection

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Solution Overview

Problem

Existing striking tools are vulnerable to damage when they inadvertently fall, with the battery and battery mounting portion being particularly susceptible to impact forces due to their weight and positioning, making it essential to enhance protectability during such incidents.

Innovation Solution

The striking tool incorporates a rotating shaft that allows the handle to move relative to the main body, featuring a first elastic member to reduce vibration transmission and an adjuster to adjust the relative movement, ensuring greater displacement in the direction of potential impact, thus alleviating damage from external forces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the battery is detachably attached to the handle for easy removal and installation, then the ease of operation is improved, but the reliability is worsened when the tool falls and the battery is exposed to impact forces

Engineering Contradiction:

Improvebattery attachment and removalVSAvoidbattery protection during falling

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent applies beforehand cushioning by providing a cushioning member (elastic member) that is pre-installed between the battery and the main body. This cushioning member is positioned in advance to absorb impact forces before they reach the battery during accidental drops, thereby protecting the battery while maintaining its detachable attachment for ease of operation.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Strength

If the handle is rigidly connected to the main body for structural stability, then the strength is improved, but the harmful factors are worsened due to increased vibration transmission to the user

Engineering Contradiction:

Improvehandle connection strengthVSAvoidvibration transmission to user

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent applies flexible shells and thin films by using a cushioning member made of elastic material positioned between the handle and main body. This elastic member acts as a flexible element that connects the handle to the main body, providing structural stability while simultaneously reducing vibration transmission to the user's hand through its shock-absorbing properties.

Inventive Principle:

Principle #30Flexible shells and thin films

3Stability of the object's composition

If the battery is positioned at the lower region of the handle for weight balance, then the stability is improved, but the harmful factors are worsened as the battery becomes the impact point during falling

Engineering Contradiction:

Improvetool balance and stabilityVSAvoidimpact force on battery

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent applies beforehand cushioning by pre-positioning a cushioning member between the battery and the main body at the lower region of the handle. This cushioning member is strategically placed to absorb impact forces during accidental drops, protecting the battery while maintaining the weight balance and stability provided by the battery's lower positioning.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

4Power

If the striking mechanism is designed for high impact force delivery, then the power is improved, but the harmful factors are worsened due to increased vibration and shock transmission

Engineering Contradiction:

Improvestriking forceVSAvoidvibration and shock transmission

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The patent applies intermediary (mediator) by introducing a cushioning member as an intermediate element between the striking mechanism and the user's hand. This intermediary component absorbs and dampens vibrations and shocks generated during high-power striking operations, allowing the tool to maintain high striking force while reducing harmful vibrations transmitted to the user.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This design effectively reduces vibration transmission and absorbs impact forces, enhancing the protectability of the striking tool, including the battery and battery mounting portion, when the tool falls, thereby minimizing damage.

Implementation Method 1

a first elastic member disposed between the main body and the handle, wherein the first elastic member reduces transmitting of vibration from the main body to the handle

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS11897109B2Striking tool

Publication Date: 2024.02.13 MAKITA CORP

AI summary

An objective is to provide a technique to securely protect the striking tool even when the striking tool inadvertently falls down. A striking tool including a rotating shaft relatively rotatably connect a main body with a handle, a first elastic member reducing transmitting of vibration from the main body to the handle in a case that the handle relatively rotates to the main body, wherein the handle includes a battery mounting portion to which battery to drive the motor is attachable and the handle is arranged to relatively move to the main body across the rotating shaft, and an adjuster such that the relative movement amount of the handle to the main body in a predetermined direction is adjusted to be larger than the relative movement amount in a direction other than the predetermined direction.