Motorcycle Case Anti-Theft Lock with Independent Button and Lever
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Solution Overview
Problem
Existing anti-theft devices for motorcycle luggage cases are difficult to operate, particularly in closing and locking, due to a small clearance between the locking plate and shell, making it inconvenient to open the counter-shell and release the engagement between the locking tooth and slot.
Innovation Solution
The anti-theft device incorporates lower and upper coupling mechanisms and a lock, featuring a faceplate, retained member, button, mount plate, carrier plate, lever, anchoring plate, and a latch bolt, allowing for independent operation of the counter-shell and detachment from the rack without additional force, with the button and lever being operable in both locking and unlocking positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locking plate is disposed very close to the shell to prevent theft, then security is improved, but the ease of operation deteriorates due to difficulty in pulling the locking plate for opening
Solution Approach 1:
The locking mechanism is divided into separate functional components: a locking plate for security engagement, a button for operation, and a linkage mechanism that translates button movement into locking plate movement. This segmentation allows each component to be optimized independently - the locking plate can be positioned close to the shell for security while the button provides easy operation through the linkage system.
Solution Approach 2:
The linkage mechanism acts as an intermediary between the button and the locking plate. When the user presses the button, the linkage translates this motion to move the locking plate, eliminating the need for the user to directly pull the locking plate. This intermediary mechanism resolves the contradiction by providing easy button operation while maintaining secure locking plate positioning.
2Reliability
If the locking plate is positioned close to the shell for security, then theft prevention is improved, but the ease of operation deteriorates due to difficulty in releasing the engagement between locking tooth and slot
Solution Approach 1:
The button is pre-positioned and designed to engage with the linkage mechanism before the locking plate is fully engaged. When the user presses the button, the linkage is already positioned to translate this action into locking plate movement, enabling easy release of the engagement between the locking tooth and slot without requiring forceful manipulation.
Solution Approach 2:
The linkage mechanism provides dynamic translation of the button's linear movement into the locking plate's rotational movement. This dynamic coupling allows the locking plate to be easily released by a simple button press, while maintaining secure engagement during normal use. The mechanical advantage provided by the linkage makes the release operation straightforward despite the locking plate's close positioning.
3Reliability
If a single-key lock is used to retain the locking plate and button, then security is improved, but the device complexity increases
Solution Approach 1:
The locking plate and button are merged into a single integrated assembly retained by the latch bolt. This combining of components reduces the number of separate parts that need to be managed, simplifying the overall device while maintaining security. The latch bolt simultaneously holds both the locking plate and button in their engaged positions, eliminating the need for separate retention mechanisms.
Solution Approach 2:
The latch bolt serves multiple functions: it retains the locking plate, retains the button, and provides the key-operated locking mechanism. This multi-functionality reduces the number of components needed in the system, simplifying the device architecture while maintaining strong security. The single key controls access to all critical components through the latch bolt mechanism.
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
Enables easy operation to close and lock the case on a motorcycle rack, facilitating the opening and detachment of the case from the rack with reduced operational effort, ensuring secure engagement and disengagement without interference between mechanisms.
Implementation Method 1
A button 121 acts on a slider 123 that is biased by a spring 122 and that is provided with a slot 124 for removable engagement with a locking tooth 10 protruding from a rack 1 of a motorcycle
Implementation Method 2
When the locking plate 111 is pulled out slightly, the linkage 113 is turned and the plate-like element 112 is thus rotated upward and toward the outside of the case
Implementation Method 3
The lock includes a latch bolt which is configured to be externally operable by a key or a coded number to move between a locking position, where the latch bolt guards against movement of the weight end and the actuating end towards the disengaging position and the pressed position, respectively
Data Source
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AI summary
An anti-theft device includes a lower couplingmechanism (4) for locking a case (10) on a motorcycle rack (20), an upper coupling mechanism (5) for closing a counter-shell (101) to a shell (102) of the case (10), and a lock (6) for locking a button (43) of the lower coupling mechanism (4) and a lever (54) of the upper coupling mechanisms (5). Operation of the button (43) results in disengagement of a retained member (44) from a retaining member (201) on the rack (20), and operation of the lever (54) results in disengagement of an anchoring plate (53) from the counter-shell (101) to permit opening of the counter-shell (101). The operations of the button (43) and the lever (54) will not interfere with each other.