Oblique Bolt Door Lock with Curved Turning Pieces
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Solution Overview
Problem
Oblique bolts in door locks require frequent lubrication to maintain functionality, leading to faster wear and functional disturbances when lubrication grease runs out, reducing their reliability and service life.
Innovation Solution
A spring-loaded oblique bolt design with recesses and turning pieces that reduce stress on wear-prone parts, utilizing rollers and curved surfaces to facilitate easy movement and minimize friction, allowing the bolt to move smoothly between retracted and extracted positions without the need for excessive lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional oblique bolt design is used, then the bolt can move between retracted and extracted positions, but the bolt wears considerably faster when lubrication grease runs out
Solution Approach 1:
The patent introduces curved surfaces on the turning pieces that interact with curved recesses in the oblique bolt. This curvature allows for rolling motion instead of sliding friction, significantly reducing wear on the bolt surfaces. The curved turning surfaces enable the bolt to move smoothly between positions while minimizing contact friction, thereby extending service life and maintaining reliability without excessive lubrication.
Solution Approach 2:
The turning pieces act as intermediary elements between the oblique bolt and the striker plate. These turning pieces with curved surfaces mediate the force transmission, allowing the bolt to rotate and move between retracted and extracted positions through a rolling mechanism. This intermediary structure reduces direct friction and wear on the bolt itself, addressing the wear problem while maintaining functional reliability.
2Ease of operation
If lubrication grease is applied to the oblique bolt, then the bolt functions properly, but the grease runs out and causes faster wear
Solution Approach 1:
The curved turning pieces and curved recesses create a self-lubricating mechanism through rolling contact. The geometry of the curved surfaces allows the bolt to move smoothly using minimal lubrication, as the rolling action naturally reduces friction. This self-service design reduces dependence on continuous lubrication application, maintaining ease of operation while improving reliability by reducing wear over time.
3Reliability
If the oblique bolt moves smoothly, then the lock operates reliably, but friction and wear occur on the bolt surfaces
Solution Approach 1:
The curved turning pieces with corresponding curved recesses create a rolling contact mechanism that minimizes friction and wear. The curvature allows the bolt to rotate and move smoothly through rolling motion rather than sliding, significantly reducing the harmful friction and wear factors while maintaining operational reliability. This geometric design directly addresses the wear problem while preserving smooth operation.
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
The solution enhances the reliability and longevity of the lock by reducing wear and the need for maintenance, enabling smoother operation and increased service life by distributing force effectively through rollers and turning pieces, thus minimizing friction and wear.
Implementation Method 1
The oblique bolt is spring-loaded towards the extracted position
Implementation Method 2
The lock body has a roller on both sides of the oblique bolt between the side of the lock body and the side of the oblique bolt
Implementation Method 3
an attempt is made to reduce stress of the parts susceptible to wear, wherein they remain functional longer
Data Source
AI summary
The invention relates to a door lock having an oblique bolt. In the invention, stress of the parts of the oblique bolt susceptible to wear is reduced, wherein they remain functional longer. The oblique bolt consists of slanted surfaces on both sides such that the tip part is narrower at its tip than in the back part of the tip part. The tip part has recesses in its lower part and upper part, which extend from the tip to the back part. Both recesses are open at the end of the tip of the tip part and on the other slanted surface such that the recess of the upper part is open on the opposite slanted surface than the recess of the lower part. Both recesses have a turning piece.