Chain Saw Control Unit and Battery Layout for Compact Housing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional chain saws have large body housing sizes, awkward component layouts, and difficult lubricant discharge adjustments, making them less user-friendly and less efficient.
Innovation Solution
The chain saw design includes a compact body housing configuration with the control unit and battery positioned to minimize overlap, an exposed discharge amount adjusting mechanism for easier access, and a top handle positioned close to the guide bar to improve intuitive cutting position awareness and balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control unit and battery are disposed to be offset from each other in the front-rear direction so that they do not overlap, then the reliability of electrical connection is improved, but the size of the body housing in the front-rear direction increases
Solution Approach 1:
The patent transitions from a one-dimensional front-rear offset arrangement to a two-dimensional overlapping arrangement where the control unit and battery overlap in the front-rear direction but are separated in the left-right direction. This dimensional change allows compact front-rear length while maintaining electrical connection reliability through proper wiring routing between the overlapping components.
Solution Approach 2:
The control unit is disposed within the overlapping region of the battery in the front-rear direction, creating a nested-like arrangement where components occupy the same longitudinal space but are differentiated in the transverse direction. This nesting approach minimizes the overall body housing length while preserving functional independence and electrical connection reliability.
2Device complexity
If the discharge amount adjusting mechanism is disposed at the lower surface of the body housing, then the device complexity is reduced, but the ease of operation deteriorates as the user must insert a tool from the lower surface side
Solution Approach 1:
Instead of providing access to the adjusting mechanism from the lower surface, the patent inverts the access direction by positioning the adjustment opening at the upper surface of the body housing. This allows users to operate the adjusting mechanism from above, which is ergonomically more convenient and does not require inserting tools from the lower side, thereby improving ease of operation while maintaining mechanical simplicity.
3Stability of the object's composition
If the top handle and guide bar are disposed relatively apart from each other in the left-right direction, then the balance of the chain saw is improved, but the ease of operation deteriorates as the user cannot intuitively acknowledge the cutting position
Solution Approach 1:
The patent employs asymmetric positioning where the top handle is offset to the right side in the left-right direction, creating an asymmetric layout that brings the handle closer to the guide bar. This asymmetric arrangement improves the user's intuitive awareness of the cutting position by aligning the handle with the cutting action, while the overall balance is maintained through strategic component distribution in the body housing.
Data Source
AI summary
A chain saw disclosed herein may include a motor configured to rotate a saw chain about a guide bar, a control unit configured to control a voltage applied to the motor, a body housing that houses the motor and the control unit, a battery detachably attached to the body housing, and a top handle provided above the body housing. The control unit may be disposed above the battery. In a rear view of the chain saw in a state where the chain saw is placed on a mount surface, the battery and the control unit may not overlap. In a top view of the chain saw in the state where the chain saw is placed on the mount surface, the battery and the control unit may overlap at least partially.