Remotely Controllable Lock Using Elastic Assembly and Ratchet
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Solution Overview
Problem
Existing remote controllable locks are complex and cumbersome due to the arrangement of stop switches and blocking mechanisms, requiring significant space and complicating the assembly process.
Innovation Solution
A remotely controllable lock design featuring an elastically deformable mechanical assembly coupled with a DC electric motor, which eliminates the need for a stop switch by using a worm screw and springs to drive a blocking finger to its active position, allowing for a more compact and simpler structure, and enabling the use of less precise and cheaper DC motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stop switches and blocking means are arranged in traditional remote controllable locks, then the locking function is reliable, but the structure becomes complex and requires significant space
Solution Approach 1:
The patent removes the stop switch from the system entirely. Instead of using a stop switch to halt the motor, the invention uses a ratchet mechanism that passively prevents reverse motion of the locking bar through mechanical engagement of teeth, eliminating the need for electrical stopping components and simplifying the overall structure.
Solution Approach 2:
The ratchet mechanism acts as an intermediary between the motor and the locking bar. It transmits the motor's forward motion to lock the door while mechanically blocking any reverse motion, thereby replacing the complex stop switch assembly with a simple mechanical intermediary that achieves the same functional outcome.
2Reliability
If stop switches and blocking means are arranged in traditional remote controllable locks, then the locking function is reliable, but the space required inside the lock increases
Solution Approach 1:
By extracting the stop switch from the system and replacing it with a compact ratchet mechanism, the patent significantly reduces the space required inside the lock body. The ratchet's mechanical design allows it to occupy minimal space while maintaining reliable one-way locking functionality.
Solution Approach 2:
The patent replaces the electrical-mechanical stop switch system with a purely mechanical ratchet mechanism. This substitution eliminates the need for additional space to accommodate electrical components, wiring, and adjustment mechanisms associated with stop switches, thereby reducing the overall volume required inside the lock.
3Reliability
If traditional blocking mechanisms are used, then the locking is secure, but the assembly process becomes more cumbersome
Solution Approach 1:
Removing the stop switch and its associated mounting requirements simplifies the assembly process. The ratchet mechanism can be integrated directly into the locking bar assembly, reducing the number of separate components that need to be installed and adjusted during manufacturing.
Solution Approach 2:
The ratchet mechanism is merged with the locking bar and motor assembly, creating an integrated unit that requires fewer separate installation steps. This combining of functions reduces assembly complexity and makes the manufacturing process more straightforward while maintaining secure locking.
4Measurement precision
If precise DC motors with stop switches are used, then the control is accurate, but the cost increases
Solution Approach 1:
The ratchet mechanism provides self-service by automatically preventing reverse motion through its mechanical design. The teeth engage passively when the locking bar moves forward and physically block any backward movement, eliminating the need for precise motor control or expensive feedback systems to maintain locking position.
Solution Approach 2:
The ratchet mechanism uses simple, inexpensive mechanical components rather than expensive precision motors and control systems. The design accepts that the motor may continue rotating briefly after locking is achieved, as the ratchet mechanically ensures the locking bar cannot move backward, allowing the use of cheaper motor components.
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 results in a more compact and easier-to-assemble lock that can be controlled using less expensive DC motors, with the elastically deformable mechanical assembly absorbing excess energy and ensuring reliable blocking without the need for a stop switch, while allowing for efficient unlocking mechanisms.
Implementation Method 1
said electric motor operates for a predetermined period of time expiring after said locking finger has reached said active position, while said elastically deformable mechanical assembly deforms
Implementation Method 2
said elastically deformable mechanical assembly comprises a worm screw mounted on said motor and at least one spring coupling said worm screw and said locking pin
Data Source
Figure 1~4
Figure 5~7
AI summary
The invention relates to a remotely controlled lock comprising: a locking element and an operating mechanism (13, 20) for controlling the unlocking of said locking element; a locking pin (28); and a remotely controlled electric motor (36) mechanically coupled to said locking pin (28), said electric motor (36) being adapted to operate to drive said locking pin (28) in translation to an active position in which said locking pin prevents the unlocking of said locking element. The lock further comprises an elastically deformable mechanical assembly (34, 48, 50) for coupling said electric motor (36) and said locking pin (28). Said electric motor (36) operates for a predetermined period of time expiring after said locking pin (28) has reached said active position.