Mechanical Door Locking Mechanism for Safe Interior Release
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Solution Overview
Problem
Conventional door safety locking apparatuses for electronic products, such as washing machines, often malfunction due to electrical sensing mechanisms, leading to reliability issues and potential safety accidents when children or animals are trapped.
Innovation Solution
A mechanical door safety locking apparatus that automatically releases the locked state by pushing the door outward, featuring a body with a locker, a dog with a locking protrusion, a tilting rod, and a spring, along with a solenoid actuator to restrict or allow rotation, ensuring safe release without electrical failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrical sensing mechanism is used to detect door closing, then the door can be locked to prevent arbitrary opening, but the reliability deteriorates due to frequent malfunctions
Solution Approach 1:
The patent replaces the electrical sensing mechanism with a pure mechanical sensing system. The pressing protrusion mechanically presses the sensing switch, and the mechanical linkage through the rod directly actuates the locking mechanism. This eliminates electrical components from the sensing and actuation path, thereby improving reliability while maintaining the door locking function.
2Ease of operation
If a mechanical locking mechanism is implemented, then the door can be securely locked, but the door cannot be easily opened from the interior when a child or animal is trapped
Solution Approach 1:
The patent implements a dynamic locking mechanism where the rod can rotate between locked and unlocked positions. The locking protrusion can engage with or disengage from the locking groove based on the rod's position. This dynamic design allows the door to be securely locked during normal operation but easily unlocked from the interior by pressing the release button, which rotates the rod to disengage the locking elements.
Solution Approach 2:
The patent introduces an intermediary release button mechanism that mediates between the interior user and the locking system. When pressed, the button actuates the rod to rotate and disengage the locking protrusion from the locking groove, allowing the door to open from the interior without requiring direct manipulation of the locking mechanism itself.
3Adaptability or versatility
If the locking protrusion is fixed on the dog, then secure locking is achieved, but the dog cannot rotate to release the lock when pressure is applied from the interior
Solution Approach 1:
The patent makes the dog's locking protrusion dynamic by coupling it to the rotatable rod through the pin. The locking protrusion can engage with the locking groove for secure locking, but can also disengage when the rod rotates in response to interior pressure on the release button. This dynamic coupling allows the dog to provide strong locking engagement when needed while enabling rotation and release when pressure is applied from the interior.
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 apparatus effectively prevents safety accidents by allowing automatic door release when pushed outward, enhancing reliability and safety without relying on electrical components.
Implementation Method 1
a spring fitted around the outer periphery of the tilting rod to elastically support the tilting rod guiding the rotating operation of the dog
Implementation Method 2
a stopper pin adapted to be inserted into a solenoid actuator mounted thereon in such a manner as to be drawn therefrom to restrict the rotation of the dog
Data Source
AI summary
A door safety locking apparatus door safety locking apparatus including: a body mounted inside a housing; a locker mounted inside a door opening and closing the interior of the housing in such a manner as to be separably fitted to the body; a dog coupled to the interior of the body by means of a shaft and having a locking protrusion formed on the upper end thereof to lock a coupling hole pierced on the locker thereonto; a tilting rod coupled at the front end thereof to the dog by means of a pin and coupled at the end portion thereof to the bottom surface of the interior of the body by means of a hinge, to guide the dog being rotated around the shaft in accordance with the pulling operation of the locker; and a spring fitted around the outer periphery of the tilting rod to elastically support the tilting rod guiding the rotating operation of the dog.