Screwdriver Tool Magazine With Sliding Pivot Bit Access

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Solution Overview

Problem

Existing screwdriver designs with storage devices in the handle lack efficient mechanisms for easy retrieval and secure storage of screwdriver bits, particularly when transitioning between storage and removal positions.

Innovation Solution

A storage device that can slide along a shaft and pivot about a bearing point, allowing a wobbling movement with a defined angle, featuring spring-loaded return elements to ensure secure storage and easy access to screwdriver bits, with locking mechanisms to maintain position during use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the storage device is designed to slide along the shaft for easy removal, then the ease of operation is improved, but the storage device may become loose or unstable during use

Engineering Contradiction:
Improveease of bit removalVSAvoidstorage device stability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The storage device is extracted from the handle body as a separate movable component that can slide along the shaft. This allows the storage device to be easily removed for bit access while maintaining a secure connection during normal operation through the sliding mechanism and stop elements.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

Stop elements are pre-positioned on the shaft to automatically limit the sliding movement of the storage device. This preliminary positioning ensures that the storage device cannot become loose or detach during use, while still allowing easy removal when needed.

Inventive Principle:
Principle #10Preliminary action

2Volume of moving object

If the storage device is made compact to fit in the handle, then the volume is reduced, but the ease of accessing bits becomes difficult

Engineering Contradiction:
Improvestorage device sizeVSAvoidbit accessibility
Core Design Contradiction:
Volume of moving objectVSEase of operation

Solution Approach 1:

The storage device transitions from a static compact form factor to a dynamic configuration that can slide outward along the shaft. This dynamic movement allows the storage device to maintain a compact size when stored in the handle while providing easy bit accessibility when extended to the removal position.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The storage device is designed to nest within the handle body when not in use, with the magazine portion fitting into the storage cavity. This nesting arrangement minimizes the overall volume occupied while maintaining full functionality when the storage device is extended for bit access.

Inventive Principle:
Principle #7Nested doll (Nesting)

3Ease of operation

If the storage device can pivot with a larger angle for better bit access, then the ease of operation is improved, but the structural complexity increases

Engineering Contradiction:
Improvebit retrieval easeVSAvoidpivoting mechanism complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The pivoting mechanism is segmented into discrete components: a pivot bearing for rotation, stop elements for limiting movement, and spring tongues for providing restoring force. This segmentation allows each component to perform its specific function with simple geometry, reducing overall structural complexity while achieving the desired pivoting functionality.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The spring-loaded tongue automatically provides the restoring force to return the storage device to its neutral position after pivoting. This self-service mechanism eliminates the need for complex motorized or manually-operated return mechanisms, simplifying the overall structure while maintaining ease of bit access.

Inventive Principle:
Principle #25Self-service

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

Facilitates easy removal and secure storage of screwdriver bits, preventing them from falling out, while ensuring dust-tight closure and easy operation with a rotating handle mechanism.

Implementation Method 1

a bearing element, in particular a projection, which is formed by an end section of the guide channel and can be pivoted about the pivot bearing from a non-pivoted position into a pivoted position against a restoring force of a spring element

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP3986670B1Screwdriver tool having magazine
Publication Date: 2025.07.23 WERA WERKZEUGE GMBH
  • EP3986670B1 patent drawingFigure 1
  • EP3986670B1 patent drawingFigure 2
  • EP3986670B1 patent drawingFigure 3~5

AI summary

The invention relates to an apparatus having a storage device (3), arranged in a storage position in a storage cavity (2) of a handle (1), for storing screwdriver inserts (4), which are insertable into a chuck (5), in particular of the apparatus, wherein the storage device (3) can be moved in an axial direction relative to an actuating axis (A) from the storage cavity (2) to a removal position, in which at least one of the screwdriver inserts (4) is removed from the storage device (3). It is essential to the invention that the storage device (3) be movable in the removal position about a pivot bearing into a pivot position relative to the actuating axis (A). Reset elements (21) can be tensioned during pivoting and create a reset force which pivots the storage device (3) back from the pivoted position thereof.