Adjustable Landing-Door Lock Ball Mechanism
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Solution Overview
Problem
Existing landing-door door lock devices have non-adjustable lock balls, leading to complicated adjustments when deviations occur between lock ball and door knife positions, resulting in poor electrical contact switch performance.
Innovation Solution
A landing-door door lock device with separately adjustable fixed and moving balls, utilizing kidney-shaped holes and counter weights to allow independent positioning adjustments, ensuring proper contact and limiting extreme positions through a rotary shaft and arc-shaped hole design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the lock balls are fixed onto the locking arm at the same time with fixed positions, then the structure is simple, but the positions cannot be adjusted separately when deviation occurs
Solution Approach 1:
The patent divides the locking mechanism into separate adjustable components. The first lock ball is adjustably mounted on the locking arm through a first adjusting mechanism, while the second lock ball is adjustably mounted through a second adjusting mechanism. This segmentation allows independent adjustment of each lock ball's position along the locking arm, resolving the contradiction between structural simplicity and position adjustability.
2Manufacturing precision
If the whole door lock device is adjusted when lock ball position deviation occurs, then position alignment is achieved, but adjustment is complicated and contact switch performance deteriorates
Solution Approach 1:
The patent implements local adjustment capability through independent adjusting mechanisms for each lock ball. The first adjusting mechanism allows adjustment of the first lock ball's position, while the second adjusting mechanism independently adjusts the second lock ball's position. This local quality approach enables precise position alignment of individual lock balls without requiring adjustment of the entire door lock device, thereby reducing adjustment complexity and preventing contact switch performance deterioration.
Data Source
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AI summary
The present invention relates to a landing-door door lock device. The following problem is solved: the position of a lock ball of a general landing-door door lock device is not adjustable, and adjustment is complicated when there is a deviation between positions of the lock ball and a door knife. The device includes a primary lock and a secondary lock, the primary lock includes a bottom plate and a locking arm, a counter weight is mounted on the locking arm, a moving ball is fixed onto the counter weight, a fixed ball is mounted on the bottom plate, the secondary lock includes a buckle plate, the locking arm is connected onto the bottom plate through a rotary shaft, an arc-shaped hole is opened on the counter weight, a shaft sleeve is sheathed on a shaft of the fixed ball, the shaft sleeve penetrates into the arc-shaped hole, a front end of the buckle plate is provided with a first lock hook, the locking arm is correspondingly provided thereon with a lock column, and the first lock hook is buckled on the lock column. The present invention has the following advantages: the rotary shaft and the fixed ball are disposed separately, the positions of the fixed ball and the moving ball can be adjusted left and right, when there is a deviation between positions of the lock ball and the door knife of the landing-door door lock device on different floors, it is not necessary to adjust the position of the door lock of the whole floor, so adjustment is simple, and a problem of poor contact occurring in electrical contacts on the door lock is also avoided.