Programmable Cylinder Lock with Segmented Grooves for 90° Rotation
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Solution Overview
Problem
Existing programmable cylinder locks require a 180° key rotation for change position, which can lead to mechanical issues and noise when attempting to use two grooves, and there is a need for a solution that allows a key rotation of less than 180° without compromising lock operation or causing noise.
Innovation Solution
The lock design incorporates two separate grooves in the stator, a change groove and a stop groove, where the stop bar and change bar have specific notches and lengths preventing mutual engagement, allowing a 90° key rotation without operational trouble or noise, with the change groove positioned at any desired angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two grooves are hollowed in the stator for stop bar and change bar engagement, then the change position can be attained with less than 180° rotation, but both bars would engage two different grooves during rotation causing operational troubles and noise
Solution Approach 1:
The single groove is segmented into two separate grooves: a first groove for the stop bar and a second groove for the change bar. This segmentation allows each bar to engage its designated groove independently, enabling the change position to be reached with less than 180° rotation while preventing both bars from engaging the same groove simultaneously, thus avoiding operational troubles and noise.
Solution Approach 2:
Each groove is given a specific local quality or characteristic: the first groove is positioned and dimensioned for stop bar engagement, while the second groove is positioned and dimensioned for change bar engagement. This local differentiation ensures that during key rotation, each bar engages only its appropriate groove, preventing mutual interference and maintaining reliable lock operation.
2Ease of operation
If two grooves are hollowed in the stator, then change position can be achieved with smaller rotation, but unnecessary disturbing noises are produced due to both bars engaging different grooves
Solution Approach 1:
The groove system is segmented into two distinct grooves with different positions and characteristics. This segmentation ensures that during key rotation, the stop bar and change bar engage different grooves at different times, preventing simultaneous engagement that would cause noise and disturbing vibrations.
Data Source
Figure 1~2
Figure 3~6
Figure 7~10
AI summary
A lock with a programming device, comprising a stator (1) a rotor (2), mounted inside the stator (1), a keyhole for a key (3), a longitudinal groove of stator (1), a series of key followers (4) and a series of locking pins (6) which, under control of a change bar (11), can be mutually engaged for the normal operation or disengaged in a change position, and which can be made movable or blocked under control of a stop bar (9) provided with springs which stress the same outwards, characterized in that there are provided two separate grooves, a change groove (12) and a stop groove (14) machined in rotor (2), and that said grooves and the stop bar (9) and change bar (11) have such conformations that are positively prevented the cooperation of the stop bar (9) with the change groove (12) and the cooperation of the change bar (11) with the stop groove (14).