Handheld processing system, handheld processing apparatus for a handheld processing system and accessory for a handheld processing system
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Solution Overview
Problem
Existing hand-guided machining systems lack safety and user-friendliness, particularly in the design of attachments that can lead to unsafe operation and user access to hazardous components.
Innovation Solution
A hand-guided machining system with a movable machining part and an electric drive motor system featuring contact bridges that automatically switch between safe and hazardous positions, ensuring the contact bridges do not bridge electrical interruptions in hazardous positions and bridge them in safe positions, thereby preventing unsafe movement and user access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If attachments are made easily detachable for user convenience, then ease of operation is improved, but user safety deteriorates due to risk of accidental detachment or access to hazardous parts
Solution Approach 1:
The contact bridge is pre-positioned on the attachment such that proper attachment automatically establishes electrical connection. This preliminary positioning ensures that safety-critical electrical connections are made before the attachment is fully secured, preventing operation with improperly attached components.
Solution Approach 2:
The patent replaces mechanical interlocking or snap-fit mechanisms with an electrical connection-based attachment system. The attachment must establish electrical contact through the contact bridge to enable operation, substituting purely mechanical fastening with an electromechanical system that provides both connection and safety verification.
2Ease of operation
If switches are used to control motor operation, then ease of operation is improved, but reliability deteriorates due to potential switch failure or bypassing
Solution Approach 1:
The patent replaces manual switch control with an automatic electromechanical control system. The contact bridge's electrical connection automatically triggers motor operation through the control circuit, eliminating the need for separate manual switches and reducing failure points associated with mechanical switch actuators.
Solution Approach 2:
The attachment itself activates the motor through its electrical connection via the contact bridge. Once properly attached, the system self-activates without requiring separate user intervention, making the attachment mechanism itself the control mechanism and reducing the number of independent control components.
3Adaptability or versatility
If attachments are designed with moving parts for positioning, then adaptability is improved, but device complexity increases due to additional components and adjustment mechanisms
Solution Approach 1:
The patent extracts the positioning function from complex mechanical adjustment mechanisms and incorporates it directly into the attachment's basic structure. The contact bridge's geometric design inherently guides and positions the attachment, removing the need for separate positioning mechanisms and reducing overall system complexity.
Solution Approach 2:
The patent merges the electrical connection function with the mechanical attachment and positioning functions into a single integrated contact bridge structure. This combination eliminates the need for separate components for each function, reducing device complexity while maintaining adaptability.
Data Source
Figure 1
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Figure 4~5
AI summary
The invention relates to a hand-held machining system (1), wherein the machining system (1) comprises: - a hand-held machining device (2) and at least one attachment (3a, 3b, 3c, 3d), - wherein the machining device (2) comprises a movable machining part (4) and an electric drive motor system (5) for moving the machining part (4), wherein the electric drive motor system (5) comprises at least one electrical path (6) with at least one interruption (7a, 7b), and - wherein the at least one attachment (3a-d) comprises a contact bridge (8a, 8b, 8c, 8d), and - wherein the machining device (2) and the at least one attachment (3a-d) are configured for the spatial arrangement of the at least one attachment (3a-d) from a danger position (GES) to a safety position (SIS) different from the danger position (GES) on the machining device (2) such that- that the at least one attachment (3a-d) in the danger position (GES) does not electrically bridge the at least one contact bridge (8a-d) and the at least one interruption (7a-b), and - that the arrangement of the at least one attachment (3a-d) in the safety position (SIS) electrically bridges the at least one contact bridge (8a-d) and the at least one interruption (7a-b).