Lock Device Hook Attachment Rod Stability
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Solution Overview
Problem
Existing lock devices for opening/closing members, such as glove box lids, face complexity in attachment and reduced load-bearing properties when using hooks instead of screws for fixation.
Innovation Solution
A lock device with a base member fixed via a hook-shaped attachment portion and a rod system that moves forward and backward, engaging with a locked portion, allowing easy attachment and maintaining load-bearing capacity by inhibiting rod movement through an inclined surface and transmission portion interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the base member is fixed to the opening/closing member with screw members, then the load-bearing property is improved, but the attaching operation becomes complex
Solution Approach 1:
The base member is divided into a hook-shaped first attachment portion for easy hooking and a second attachment portion for additional securing. This segmentation allows the attachment process to be simplified while maintaining structural integrity and load-bearing capacity through the combined action of both portions.
Solution Approach 2:
The attachment mechanism transitions from a static screw-fixed state to a dynamic hooking process where the first attachment portion can be easily hooked onto the attaching edge portion. The rod's movement along the inclined surface also represents a dynamic element that enables easy engagement and disengagement while maintaining secure connection.
2Ease of operation
If the base member is hooked and attached to an edge of an attaching hole instead of using screw members, then the attaching operation is simplified, but the load-bearing property is reduced
Solution Approach 1:
The base member combines two different attachment approaches into one unified structure: the hook-shaped first attachment portion provides easy attachment operation, while the second attachment portion adds reinforcement. This merging of simple hooking with additional attachment elements maintains load-bearing property while preserving ease of operation.
Solution Approach 2:
The rod acts as an intermediary element that transmits force between the operation member and the locked portion. By positioning the rod to move along the inclined surface of the first attachment portion, the system mediates between the simple hooking action and the requirement for secure load-bearing connection, distributing forces effectively.
3Device complexity
If the rod is allowed to move freely in response to operation member rotation, then the locking mechanism becomes simple, but the rod's positional stability deteriorates
Solution Approach 1:
The inclined surface on the rod provides a curved guide path that constrains the rod's movement. As the operation member rotates and pushes against the inclined surface, the rod is guided along a specific trajectory, maintaining positional stability while still allowing the necessary movement for locking and unlocking operations.
Solution Approach 2:
The rod's interaction with the inclined surface creates a self-guiding mechanism where the rod's own geometry (the inclined surface) serves to constrain and guide its own movement. This self-service approach maintains positional stability without requiring additional complex guiding components, keeping the locking mechanism simple.
Data Source
AI summary
A lock device includes a base member fixed on an opening/closing member, an operation member rotatably supported on the base member, and a rod configured to move forward and backward to be engaged with and disengaged from a locked portion of the fixed member in response to operation of the operation member. The operation member includes a pivot portion and a transmission portion. The base member includes a first attachment portion and a second attachment portion. When the transmission portion presses an inclined surface of the rod and thus causes the rod to move backward, the first attachment portion abuts against the rod, thereby limiting movement of the rod in the direction intersecting with the forward and backward movement direction of the rod.