Drawer Guide Latch Cam Mechanism for Low-Stress Opening
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Solution Overview
Problem
Existing pull-out guide opening devices suffer from material stress, limited service life, and increased space requirements due to complex mechanisms and exposure to dirt, leading to potential damage and malfunctions.
Innovation Solution
A compact opening device with a cylindrical housing featuring a control cam that allows the control element to rotate and slide, reducing material stress and incorporating a compression spring for adjustable latch positioning, ensuring smooth guidance and protection from dirt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the latch is guided along a guide track on the housing, then the latch can be fixed in a closed position, but considerable material stress occurs especially in the case of jerky movements
Solution Approach 1:
The control element is designed with a cylindrical shape that rotates along a control cam instead of sliding linearly along a guide track. This curved rotational path eliminates bending loads and reduces frictional forces, preventing material stress while maintaining reliable latch fixation.
Solution Approach 2:
The control element is made rotatable about its longitudinal axis, allowing it to dynamically adapt its position along the control cam. This dynamic rotation enables smooth guidance during jerky movements, reducing material stress compared to fixed linear guidance.
2Ease of operation
If the spring and control cam are arranged at a distance from one another, then they can contact the drawer, but the space requirement of the locking mechanism is comparatively large
Solution Approach 1:
The control element combines multiple functions: it guides the latch along the control cam, transmits force from the spring, and contacts the drawer. This merging of functions into a single component reduces the overall space requirement while maintaining operational effectiveness.
Solution Approach 2:
The control element serves multiple purposes: it acts as a guide for the latch, a force transmission element from the spring, and a direct contact point with the drawer. This multi-functionality eliminates the need for separate components, reducing the locking mechanism's volume.
3Ease of operation
If the control element is exposed, then it can be accessed, but dirt can impair the function of the locking mechanism
Solution Approach 1:
The control element is nested within the housing, which provides protection from dirt and contaminants. The housing acts as a protective enclosure while still allowing the control element to perform its guidance and force transmission functions internally.
Solution Approach 2:
The housing provides a protective shell around the control element, isolating it from environmental contaminants like dirt. This protective enclosure maintains the control element's functionality while preventing damage from external factors.
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 minimizes material wear, enhances service life, and allows for a compact design with adjustable latch positioning, ensuring reliable operation and reduced space requirements while maintaining functionality.
Implementation Method 1
a latching mechanism is provided in order to fix the latching pawl in a closed position against the force of a spring
Implementation Method 2
The detent mechanism has a substantially cylindrical housing with a control cam, along which a control element can be displaced in a longitudinal direction of the housing
Data Source
Figure 1
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AI summary
The device has a latching pawl (7) moving along a guide (8) in a guide housing (6), and provided with a receiver for an activator (9) that is coupled with a movable rail (4) of a drawer guide (2). A latch mechanism fixes the latching pawl in a closing position against force of a spring. The latch mechanism has a cylindrical housing with a control cam, where a control element is movable along a longitudinal direction of the cylindrical housing and rotatably guided about a longitudinal axis along the control cam.