Key Cylinder Direction Conversion Rotary Ring Shock Resistance
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Solution Overview
Problem
Existing electronic locking devices face reliability issues due to complex components and increased costs, with the rotation control spring being prone to detachment under external shocks, leading to misoperation and reduced durability.
Innovation Solution
A key cylinder design featuring a direction conversion rotary ring that rotates with a spur gear, separating the driving motor and lock pin components to enhance reliability and durability, using a spiral groove for straight-line motion of the lock pin, eliminating the need for a conventional spring and simplifying the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotation control spring is used to prevent arbitrary rotation of the driving motor, then reliability of locking and releasing is improved, but the spring is prone to detachment under external shocks, leading to misoperation and reduced durability
Solution Approach 1:
The invention divides the rotation control mechanism into two independent parts: a driving part (rotation stopper with square groove) and a passive part (locking pin with locking projection). This segmentation eliminates the rotation control spring that was vulnerable to external shocks, while maintaining the reliability of preventing arbitrary rotation through the engagement of the square groove and locking projection.
Solution Approach 2:
The invention merges the rotation control spring function into the structural design of the rotation stopper and locking pin. The square groove in the rotation stopper and the locking projection on the locking pin work together as an integrated mechanical interlock, eliminating the need for a separate spring component that could detach under external shocks.
2Ease of operation
If a conventional spring mechanism is used for lock pin operation, then locking and releasing functions are achieved, but component complexity increases and assembly becomes more difficult
Solution Approach 1:
The invention extracts and eliminates the spring component from the lock pin operation mechanism. Instead of using a spring to drive the lock pin, the system uses a direction conversion rotary ring with a spiral groove that converts rotational motion from the driving motor directly into the linear motion needed for lock pin operation, simplifying the overall mechanism.
Solution Approach 2:
The direction conversion rotary ring serves as an intermediary component that translates the rotational output of the driving motor into the linear motion required for lock pin operation. The spiral groove on the rotary ring acts as a mechanical mediator, converting rotation to linear movement without requiring a separate spring mechanism.
3Ease of manufacture
If components are assembled in a traditional integrated manner, then manufacturing is straightforward, but durability is reduced due to vulnerability to external shocks
Solution Approach 1:
The invention segments the internal components (driving motor, direction conversion rotary ring, locking pin) into a modular assembly that can be manufactured and tested separately before final integration into the cylinder body. This modular approach maintains manufacturing simplicity while improving durability by allowing each component to be optimized for shock resistance.
Solution Approach 2:
The invention designs the internal component arrangement and mounting structures to inherently resist external shocks before they can cause damage. The segmented assembly allows for shock-absorbing mounting features and flexible connections that protect components during normal operation, while the simplified structure makes these protective features easier to implement.
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 design improves the reliability of locking and unlocking operations, reduces component costs, and enhances durability by protecting components from external shocks through separate assembly of the driving and passive parts, ensuring stable operation and reduced misoperation.
Implementation Method 1
a driving motor performing normal rotation and reverse rotation drive in accordance with an input signal of the printed circuit board
Implementation Method 2
a spiral groove formed in the direction conversion rotary ring in a rear direction, and a lock pin installed in the lock pin guider such that the lock pin fluctuates within a pin hole formed in a direction perpendicular to an axis direction of the cylinder plug
Data Source
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AI summary
Provided is a key cylinder for an electronic locking device including a cylinder housing forming an appearance and a cylinder plug installed in the cylinder housing to lock and release the cylinder housing, wherein the cylinder plug includes a lock head including a key insertion hole into which a key head of a publicly known electronic key is removably inserted to a front side, a printed circuit board exchanging power and authentication data from the publicly known electronic key by installing key connection pins in a connection housing installed through the lock head, accessing to the key connection pins and equipping with a microprocessor and EEPROM, a driving motor performing normal rotation and reverse rotation drive in accordance with an input signal of the printed circuit board, a spur gear installed in an axis of the driving motor, a lock pin guider fixed in a rear direction of the cylinder plug, a direction conversion rotary ring rotating in accordance with drive of the driving motor by an internal gear rotatably installed through a fixing axis in the center of the lock pin guider and engaged with the spur gear in a front direction and a spiral groove formed in a rear direction, and a lock pin installed in the lock pin guider such that a pin hole formed in a direction perpendicular to an axis direction of the cylinder plug fluctuates, inserted into one side of a spiral groove formed in the direction conversion rotary ring, positioned through a straight guide wall intercommunicating with the pin hole, and appearing and disappearing in lock holes and formed in the cylinder housing by moving in a perpendicular direction to axis rotation of the direction conversion rotary ring through installation of a foot pin performing straight line motion to realized locking and release of the key cylinder.