Press-Type Door Lock Bidirectional Drive Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional door locks are prone to operational issues due to the need to rotate the drive device in a specific direction for locking and unlocking, which can lead to incorrect operation.
Innovation Solution
A press-type spherical door lock design that includes a drive device with a transmission member, springs, and a positioning slot, allowing the safety mechanism to be locked and unlocked regardless of the rotation direction, using a sliding fit mechanism and a rubber casing to ensure secure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drive device is rotated in a specific direction to lock and unlock the safety mechanism, then the locking and unlocking functions are achieved, but the operation becomes complex and error-prone due to direction requirements
Solution Approach 1:
The patent applies the inversion principle by designing the positioning slot and positioning bolt mechanism such that the drive device can be operated in either rotation direction. Instead of requiring a specific rotation direction, the positioning slot allows the positioning bolt to engage at any rotational position, effectively inverting the conventional approach where direction control is necessary. This resolves the contradiction by making the operation simple and error-proof while maintaining reliable locking and unlocking functions.
2Ease of operation
If a positioning slot and positioning bolt mechanism is added to allow bidirectional operation, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The positioning slot and positioning bolt mechanism serves multiple functions: it enables bidirectional operation, maintains engagement between the drive device and cylindrical tube, and ensures reliable locking and unlocking. By designing this mechanism to perform multiple functions simultaneously, the patent avoids adding excessive complexity while achieving the goal of simplified operation. The positioning slot integrated into the cylindrical tube and the positioning bolt on the drive device work together as a multi-functional component system.
3Ease of operation
If the drive device can operate without direction constraints, then the ease of operation is improved, but the reliability may be compromised due to potential incorrect engagement
Solution Approach 1:
The positioning slot and positioning bolt mechanism provides mechanical feedback that confirms proper engagement. When the drive device is rotated in either direction, the positioning bolt must align with and engage into the positioning slot to complete the operation. This engagement provides tactile and mechanical feedback that confirms correct operation, ensuring reliability even though the direction of rotation is not constrained. The feedback mechanism prevents incorrect engagement while allowing operational flexibility.
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 door lock can be easily operated without regard to the rotation direction, eliminating potential operational risks and ensuring secure locking and unlocking.
Implementation Method 1
a first spring (13) and a second spring (14); the first spring (13) is disposed between the transmission member (11) and the main body (122); the second spring (14) is sleeved on the head (121) of the drive member
Implementation Method 2
a brake rod (4) and a brake disc (130); the brake rod (4) is pressed against the brake disc (130), so the door is locked
Data Source
AI summary
A lock, including an outer subassembly, an inner subassembly, a safety mechanism, and a clutch. The clutch includes a square transmission tube and a sub-clutch. The safety mechanism includes a brake rod and a drive device. The inner subassembly includes an inner baffle plate, an inner baffle plate cover, a cylindrical tube, a transmission frame, and an inner doorknob. The inner baffle plate is inserted in the inner baffle plate cover. The cylindrical tube fits rotations of the inner baffle plate and the inner baffle plate cover. The transmission frame is disposed at one end of the cylindrical tube, and the inner doorknob is disposed at the other end of the cylindrical tube. The drive device includes a transmission member, a drive member, a first spring, a second spring, and a positioning slot. The positioning slot is disposed on the cylindrical tube.