Push-pull Door Lock with Selectable Lever Direction
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Solution Overview
Problem
Conventional push-pull door locks require the door opening direction and lever work direction to coincide, making it inconvenient to open the door when they do not align, leading to an awkward position.
Innovation Solution
A push-pull door lock design that allows the lever to pivot in a front-and-back direction with a selection member limiting the pivoting range, enabling either a push or pull operation without coinciding the door opening direction with the lever work direction, using a protruding portion and selection holes to determine the operation type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the lever is designed to perform only one operation (push or pull) on each main body, then the lock mechanism can be simplified, but the door opening direction and lever work direction must coincide, making installation inconvenient
Solution Approach 1:
The lever is designed to be dynamically adjustable between push and pull operations through the selection member with selection holes. The lever can pivot in different directions depending on which selection hole the protruding portion engages with, allowing the same lever to adapt to different door opening directions without changing the physical lever structure itself.
Solution Approach 2:
The operational parameter of the lever (push or pull direction) is changed by selecting different selection holes in the selection member. By changing the engagement point of the protruding portion with different selection holes, the lever's work direction is parameterized and can be adjusted to match the required door opening direction.
2Adaptability or versatility
If the door opening direction and lever work direction do not coincide, then the lever can operate in any direction, but the door ends up in an awkward position making it difficult to open
Solution Approach 1:
The selection member provides feedback on the lever's operational state by having the protruding portion engage with specific selection holes that correspond to push or pull operations. This feedback mechanism ensures that the lever operates in the correct direction relative to the door opening, preventing awkward positions while maintaining flexibility.
3Ease of operation
If a selection member with multiple selection holes is added, then the lever work direction can be selected to match different door opening directions, but the device complexity increases
Solution Approach 1:
The selection member serves multiple functions: it selects the lever work direction, limits the pivoting range, and provides mechanical guidance for the protruding portion. By making the selection member multi-functional, the patent reduces the need for additional separate components, thereby limiting the increase in overall device complexity while achieving directional flexibility.
Data Source
AI summary
Provided is a push-pull door lock capable of selecting a lever work direction which may be installed without needing to coincide a door opening direction with the lever work direction by driving a driving unit during both a push operation and a pull operation of a lever coupled to each of housings of a front surface and a rear surface of a door to unlock a lock mechanism received in the door. The push-pull door lock includes: a lever that is provided on a front surface of each of housings, which are respectively coupled to an inside and an outside of a door by supports, to pivot in a front-and-back direction and has a protruding portion protruding toward a door; and a selection member that is provided on a rear surface of the housing and limits a pivoting range of the protruding portion in order to select a push operation or a pull operation of the lever.