Push-pull Door Lock Latch Bolt Angle Restriction Groove
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Solution Overview
Problem
Conventional push-pull door locks face issues with latch bolts malfunctioning due to excessive rotation, leading to difficulties in opening and closing doors smoothly and quietly, with potential errors in locking states.
Innovation Solution
A push-pull door lock with a latch unit that includes a unit case, a movable bracket, an actuating cam, an elastic member, a support block, a connecting shaft, and a latch bolt with an angle restriction groove, which restricts the rotating angle of the latch bolt to prevent excessive rotation and ensure smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the latch bolt is allowed to rotate freely to enable smooth door opening, then the door can open smoothly, but the latch bolt may rotate excessively and malfunction
Solution Approach 1:
The latch bolt is designed with dynamic rotation control through the angle restriction groove that interacts with the connecting shaft. The groove allows the latch bolt to rotate freely within a controlled range for smooth door opening, while automatically stopping at predetermined angles to prevent excessive rotation and malfunction. This dynamic constraint mechanism balances operational smoothness with reliability.
Solution Approach 2:
The invention changes the rotational parameter of the latch bolt by introducing the angle restriction groove with specific geometric parameters (width, depth, inclination angle). These parameters control the rotation range of the latch bolt, allowing it to rotate sufficiently for door opening while preventing excessive rotation. The groove's dimensional parameters directly regulate the operational boundaries of the latch bolt.
2Ease of operation
If the latch bolt rotates a large angle to ensure complete escape from the locking member, then the door can be opened, but excessive rotation causes noise and malfunction
Solution Approach 1:
The angle restriction groove creates a dynamic rotation control mechanism that allows the latch bolt to rotate freely during door opening but automatically limits the rotation angle. The groove's geometric constraints prevent the latch bolt from rotating excessively, thereby eliminating harmful noise and malfunction while maintaining effective door opening capability.
Solution Approach 2:
The invention converts the potentially harmful excessive rotation into a beneficial controlled rotation by designing the angle restriction groove to stop the latch bolt at precise angles. The groove transforms the uncontrolled rotational motion into a controlled movement that achieves door opening while preventing harmful effects like noise and malfunction.
3Ease of operation
If the latch bolt is completely inserted into the latch unit to allow door opening, then the door can be opened, but the locking state may not be maintained firmly
Solution Approach 1:
The angle restriction groove provides dynamic control over the latch bolt's rotational position, allowing it to rotate to the appropriate angle for door opening while maintaining stable locked state. The groove ensures the latch bolt stops at precise angular positions, preventing both incomplete insertion and excessive rotation, thereby maintaining stable locking throughout the operation.
Solution Approach 2:
The invention uses parameter changes in the angle restriction groove (width, depth, inclination angle) to control the latch bolt's rotational parameters. These geometric parameters ensure the latch bolt rotates to the correct angle for door opening while maintaining firm locked state stability. The groove's dimensional parameters directly regulate both opening capability and locking stability.
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 allows for smooth and quiet operation of the door with minimal force, while maintaining a secure locked state, even with minor errors in handle rotation, thereby preventing latch bolt malfunction.
Implementation Method 1
an elastic member provided in the movable bracket in such a way as to be elastically supported against the movable bracket
Data Source
AI summary
The present inventive concept relates to a push-pull door lock having a latch unit, which is provided inside a door so as to open/close the door from/to a door frame according to pushing/pulling of a handle. The latch unit comprises: a unit case which is provided to be embedded in the door so as to face the door frame; a movable bracket which is provided to be linearly movable in the unit case; an actuating cam which is provided in the movable bracket to be pivotable and is pivoted according to pushing/pulling of the handle so as to linearly move the movable bracket; an elastic member provided in the movable bracket to be elastically supported; a support block which is elastically supported by the elastic member and is provided to be latched by the movable bracket to be linearly movable along with the movable bracket; a connecting shaft provided through the support block; a latch bolt which is rotatably coupled to the connecting shaft and has an angle restriction groove formed in a portion where the connecting shaft is connected, in order to restrict the rotating angle thereof; and a fixed plate which has a through-hole through which the latch bolt passes and is fixedly coupled to the unit case.