Door Lockset Jig Backset Adjustment for Hole Saw Clearance
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Solution Overview
Problem
Current lockset jigs for doors require multiple jigs for different backset options and can be damaged by hole saws, leading to inconsistent spacing and potential damage to the jig.
Innovation Solution
A cutting guide apparatus with an adjustable backset assembly and engagement interface that allows for variable placement of bore holes, featuring a contactor with a passage for hole saws and arms for adjusting the setback distance, enabling use with different door thicknesses and preventing jig damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple jigs are used to accommodate different backset options, then different backset options (2-3/8 inches or 2-3/4 inches) can be accommodated, but device complexity increases
Solution Approach 1:
The jig incorporates an adjustable backset assembly that allows the spacing element to be repositioned between different backset positions (2-3/8 inches and 2-3/4 inches). This dynamic adjustment capability eliminates the need for multiple fixed jigs, as one jig can now accommodate multiple backset options through mechanical reconfiguration of the spacing element position.
Solution Approach 2:
The jig is designed with a universal backset assembly that can serve multiple functions by adjusting to different backset positions. The spacing element can be repositioned along the leg to accommodate standard backset options, making a single jig versatile enough to replace multiple specialized jigs for different door configurations.
2Ease of manufacture
If hole saws are used to cut through the door, then bore holes can be created, but the hole saws can damage the jig at the edges of the bore hole
Solution Approach 1:
The jig incorporates a sacrificial edge component or protective element positioned at the cutting edge where the hole saw contacts the jig. This intermediary element absorbs the damage from the hole saw teeth, protecting the main structural components of the jig from direct damage while still allowing accurate bore hole creation.
Solution Approach 2:
The jig design includes protective features built into the structure at potential damage points, such as reinforced edges or sacrificial material layers, that are positioned in advance to cushion or absorb the impact and damage from hole saw cutting operations before they can affect critical jig components.
3Manufacturing precision
If the jig is attached to the edge of the door, then proper spacing can be provided, but the engagement interface must accommodate variable door thicknesses
Solution Approach 1:
The engagement interface includes adjustable components that allow the jig to adapt to different door thicknesses. The spacing element can be repositioned along the leg to accommodate variable backset positions, and the engagement mechanism can adjust to different door thicknesses while maintaining precise spacing for consistent backset measurement.
Data Source
AI summary
A cutting guide apparatus for guiding placement of bore holes in a door may include an engagement interface and a backset assembly. The engagement interface may be configured to retain the apparatus proximate to an edge of a door. The engagement interface may include a handle hole guide structure and an edge bore guide structure. The backset assembly may be operably coupled to the engagement interface to enable an amount of backset from the edge of the door to a center of the handle hole guide structure to be adjusted. The engagement interface may include a first leg configured to be disposed along a first face of the door, and a second leg configured to be disposed along a second face of the door. The backset assembly may be configured to engage the edge of the door at a variable location between the first and second legs.