Rail Guide Cardioid Locking Mechanism for Touch-Latch Furniture
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Solution Overview
Problem
Existing apparatuses for controlling the movement of rail guides in furniture lack efficient mechanisms for force-assisted and damped movement, particularly in controlling the opening and closing directions of drawers, and do not provide synchronized touch-latch functionality for large furniture parts.
Innovation Solution
An apparatus with a fixed rail, a moving rail, and a slide mechanism that includes an energy accumulator, a locking member, and a cardioid guide track, allowing for force-assisted opening and synchronized closing through a locking arrangement that uses an energy accumulator to block or release the slide, and a synchronization device for coordinated movement of multiple rail guides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking arrangement with cardioid and locking member is used to block movement in the locking position, then the furniture part can be held securely in the closed position, but the mechanism increases device complexity
Solution Approach 1:
The patent employs a cardioid-shaped guide track (a curved geometric form) that works with a locking member to create a compact locking mechanism. The curved cardioid geometry enables the locking and unlocking functions through simple geometric interaction rather than complex mechanical linkages, resolving the contradiction between reliable holding and mechanism complexity.
2Ease of operation
If an energy accumulator is used to provide force-assisted movement in the opening direction, then the ease of operation is improved, but the device complexity increases due to additional components
Solution Approach 1:
The energy accumulator (spring) is pre-loaded during the closing operation to store energy, which is then automatically released to assist opening without requiring additional actuators or complex control systems. This preliminary energy storage during normal operation provides force assistance while minimizing added complexity.
Solution Approach 2:
The spring-loaded energy accumulator automatically provides force-assisted opening without external control or additional power sources. The mechanism serves itself by utilizing the energy stored during closing to facilitate opening, eliminating the need for motors, sensors, or complex control circuitry.
3Productivity
If a slide mechanism with locking arrangement is implemented to enable touch-latch function, then the productivity is improved through synchronized movement, but the manufacturing precision requirements increase
Solution Approach 1:
The cardioid guide track provides inherent geometric guidance that constrains the locking member's movement path. This curved geometric constraint naturally guides the locking and unlocking actions along a predetermined trajectory, reducing sensitivity to manufacturing tolerances while enabling synchronized touch-latch functionality.
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
Enables efficient, synchronized, and force-assisted movement of furniture parts, such as drawers, with a touch-latch function, ensuring smooth operation and coordinated movement of multiple rail guides.
Implementation Method 1
the apparatus has an energy accumulator, a main component and a slide that is movable with respect to the main component
Implementation Method 2
the slide is movable in the opening direction under the effect of the loaded energy accumulator
Implementation Method 3
the cardioid is a guide track, wherein mechanical guidance of the locking member along the guide track is set up
Implementation Method 4
the locking member is held fast at a retaining point on the guide track, wherein the locking member is held fast in a blocking position of the slide
Implementation Method 5
the locking member is movable in an elastically deflectable manner, e.g. out of a basic position on the main component into a deflected position
Data Source
AI summary
An apparatus for controlling the movement of a rail guide which comprises a fixed rail and a moving rail that is linearly displaceable in an opening direction and in a closing direction. The apparatus is designed for force-assisted displacement of the moving rail in the opening direction and has an energy accumulator, a main component and a carriage that is displaceable with respect to the main component. The carriage is movable in the opening direction under the effect of the loaded energy accumulator and, when the apparatus is mounted on the rail guide, carries along the moving rail in the opening direction. The apparatus has a locking arrangement with a cardioid and a locking body that can be brought into contact along the cardioid. When the energy accumulator is loaded, a displacement of the carriage in the opening direction is blocked. The carriage has the cardioid.