Hand-Held Power Tool Holder With Snap Hook Attachment
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Solution Overview
Problem
Existing hand-held power tool holding devices for screwdriver bits lack a secure and user-friendly design, often resulting in unstable and inefficient screwing processes due to inadequate attachment mechanisms.
Innovation Solution
A compact holding device with a first holding unit forming a form fit or non-positive fit with the tool holder's output shaft, utilizing snap hooks, retaining springs, or magnets for secure attachment, and a second holding unit with a magnet for axial retention, allowing for simplified screwing and torque resistance up to 0.1 Nm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional holding device is used, then the screwing process can proceed, but the attachment is unstable and the process is inefficient
Solution Approach 1:
The holding device is divided into two functional units: a first holding unit for mounting on the power tool output shaft, and a second holding unit for holding the screw element. This segmentation allows each unit to be optimized independently - the first unit provides stable attachment via snap hooks or retaining springs, while the second unit provides secure screw holding via magnets, thereby improving both reliability and efficiency
Solution Approach 2:
The second holding unit is arranged on the first holding unit in a nested configuration, with the second unit positioned to extend from the first unit. This nesting approach compactly integrates both holding functions into a single compact device that maintains stability while enabling efficient screwing operations
2Ease of operation
If the holding device is designed to be compact, then user-friendliness improves, but the attachment mechanism becomes more complex
Solution Approach 1:
The first holding unit incorporates self-actuating retention elements such as snap hooks that automatically engage with the output shaft, or retaining springs that provide automatic retention. This self-service mechanism eliminates the need for complex manual attachment procedures, maintaining user-friendliness while providing secure attachment
Solution Approach 2:
The first holding unit is designed with multi-functional retention elements that can provide both mounting and retention functions through a single integrated structure. The snap hooks or retaining springs serve multiple purposes: securing the device to the output shaft, providing torque resistance, and enabling easy detachment, thereby reducing overall device complexity
3Loss of time
If the holding device allows easy tool changes, then operation speed improves, but attachment security may be compromised
Solution Approach 1:
The retention elements in the first holding unit are designed with dynamic characteristics - snap hooks that can be quickly released by applying minimal force, or spring-loaded mechanisms that maintain secure attachment during operation but allow rapid detachment when needed. This dynamic design enables fast tool changes while maintaining secure attachment during the screwing process
Solution Approach 2:
The holding device is pre-configured with retention elements positioned and pre-loaded to maintain secure attachment during operation. The snap hooks are pre-positioned to engage with the output shaft features, and retaining springs are pre-loaded to provide continuous retention force, ensuring attachment security is maintained without requiring active management during use
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
The solution provides a safer, more user-friendly screwing process by ensuring a stable and secure attachment of the screwdriver bit, preventing damage to the tool when torque exceeds 0.1 Nm and allowing for easy tool changes without manual intervention.
Implementation Method 1
the magnet (330) is designed such that it forms a magnetic connection with the screw element (270)
Implementation Method 2
the magnet (330) is arranged to form a magnetic connection with the stop surface (1397) of the output shaft (224)
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
In a holding device (300) for a hand-held power tool (100) with a tool holder (140) designed to receive at least one insert tool (170), in particular a screwdriver bit, wherein the holding device (300) is provided for holding a fastening element (270), in particular a screw element, a first holding unit (310) for fixing the holding device (300) to a hand-held power tool (100) and a second holding unit (320) for holding a fastening element (270), in particular a screw element, are provided, wherein the first holding unit (310) is designed to enable a detachable fastening of the holding device (300) to an output shaft (120; 224) of a hand-held power tool (100) driving the tool holder (140).