Removable Lamp for Walk-Behind Equipment Lighting

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Solution Overview

Problem

Walk behind yard maintenance devices lack flexible and efficient lighting solutions that allow operators to illuminate paths and specific areas without moving the device, limiting operator satisfaction and functionality.

Innovation Solution

A removable lamp system for walk behind products, which includes a mobility assembly and a mounting receptacle, allowing the lamp to be detachably connected to an accessory panel and powered either by the device or batteries, enabling flexible lighting without relocating the device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed lighting system is integrated into the walk behind yard maintenance device, then the device has stable lighting functionality, but the operator cannot direct light to various locations without moving the device

Engineering Contradiction:
Improvelighting position flexibilityVSAvoidlighting system complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The lighting system is segmented into a removable lamp unit that can be separated from the main device. The lamp includes a lamp housing, light source, and battery pack that can be detached and repositioned independently, allowing the operator to direct light to various locations without moving the entire device.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The lamp is extracted as a separate removable component from the main device body. The lamp can be completely removed from its mounting receptacle and carried by the operator to illuminate areas that are not in the direct path of device movement, providing flexible lighting without requiring the device itself to be relocated.

Inventive Principle:
Principle #2Taking out (Extraction)

2Adaptability or versatility

If a removable lamp system is added to provide flexible lighting, then lighting versatility is improved, but the device structure becomes more complex

Engineering Contradiction:
Improvelighting positioning flexibilityVSAvoidmounting system complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The mounting receptacle is designed with universal compatibility to accept different lamp configurations and positions. The receptacle can be mounted on various parts of the device frame and accommodates lamps with different orientations, providing multiple functions from a single mounting system while keeping the overall structure relatively simple.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The lighting system transitions from a fixed state to a dynamic, reconfigurable state. The lamp can be easily inserted into and removed from the mounting receptacle, allowing the system to adapt its configuration based on operational needs while maintaining a simple base structure that doesn't require complex mechanisms for the removability feature.

Inventive Principle:
Principle #15Dynamics

3Ease of repair

If the lamp is permanently fixed to the device, then installation is simple, but the lamp cannot be removed for inspection or replacement

Engineering Contradiction:
Improvelamp inspection and replacementVSAvoidlighting setup simplicity
Core Design Contradiction:
Ease of repairVSEase of operation

Solution Approach 1:

The mounting receptacle is pre-configured with alignment features and retention mechanisms that guide the lamp into proper position during installation. This preliminary preparation of the mounting structure allows for tool-free or minimal-tool installation and removal, making maintenance simple while maintaining ease of setup through the same removable interface.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentEP2729622B1Removable lamp for outdoor power equipment
Publication Date: 2020.04.08 HUSQVARNA AB
  • EP2729622B1 patent drawingFigure 1
  • EP2729622B1 patent drawingFigure 2A
  • EP2729622B1 patent drawingFigure 2B

AI summary

An outdoor power equipment device may include a mobility assembly and a mounting receptacle. The mobility assembly may support a device frame of the outdoor power equipment device and enable an operator of the outdoor power equipment device to facilitate movement of the outdoor power equipment device. The mounting receptacle may be coupled to the device frame. The mounting receptacle may include a removable lamp operable to provide light at least when removed from the mounting receptacle.