Cylinder Lock Protective Device Resin Metal Composite
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Solution Overview
Problem
Existing protective devices for cylinder locks made from metal increase the weight of vehicles, compromising theft resistance while attempting to ensure security.
Innovation Solution
A protective device for a cylinder lock featuring a resin case and a metal protector, where the case is formed with multiple side wall portions facing different directions, with at least two side wall portions resiliently engaged and one side wall portion fastened to the body, enhancing assembly ease and security while reducing weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the case is made from metal to ensure theft resistance, then security is improved, but weight increases
Solution Approach 1:
The case is constructed using composite materials: a resin base material for the case body provides lightweight properties, while metal reinforcement pieces are embedded in specific regions to provide theft resistance. This composite structure allows the case to achieve both light weight and high security without using solid metal throughout.
Solution Approach 2:
Instead of making the entire case from metal, metal reinforcement pieces are strategically placed only in specific regions where theft resistance is most needed. This localized approach provides security enhancement while minimizing the overall weight increase that would result from a fully metal construction.
2Weight of stationary object
If the case is made from resin to reduce weight, then weight is reduced, but theft resistance deteriorates
Solution Approach 1:
The case is constructed using composite materials: a resin base material for the case body provides lightweight properties, while metal reinforcement pieces are embedded in specific regions to provide theft resistance. This composite structure allows the case to achieve both light weight and high security without using solid metal throughout.
Solution Approach 2:
Instead of making the entire case from metal, metal reinforcement pieces are strategically placed only in specific regions where theft resistance is most needed. This localized approach provides security enhancement while minimizing the overall weight increase that would result from a fully metal construction.
3Ease of operation
If multiple side wall portions are resiliently engaged with the body, then assembly ease is improved, but fixation strength may deteriorate
Solution Approach 1:
The case is divided into multiple side wall portions that can be separately engaged with the body. This segmentation allows for easier assembly as each portion can be independently installed, while the cumulative effect of multiple engagement points provides sufficient overall fixation strength.
Solution Approach 2:
Different side wall portions use different engagement methods (resilient engagement vs. fastening) appropriate to their specific locations and functional requirements. This localized approach optimizes both assembly ease and fixation strength for each region of the case.
Data Source
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AI summary
A protective device for a cylinder lock is provided in which a shutter plate is supported on a casing having a mechanical key insertion hole for a mechanical key to be inserted into a cylinder lock, the shutter plate being covered by a case forming part of the casing and being capable of moving between a closed position in which the shutter plate closes the mechanical key insertion hole and an open position in which the mechanical key insertion hole is opened, wherein the casing (35) comprises a body (38) that is provided so as to be connected to a cylinder body of the cylinder lock, and the case (39), which is formed so as to cover the shutter plate (36) and is fixed to the body (38), and the case (39) comprises a case main part (29), made of a resin, and a protector (30), made of a metal, that has at least a flat plate portion (30a) formed into a flat plate shape so as to cover the shutter plate (36) and that is inserted and joined to the case main part (29). This enables the case to be lightened while ensuring the theft resistance.