Stepped Belt Buckle Structure for Thin Secure Adjustment
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Solution Overview
Problem
Existing belt adjusting and holding devices are cumbersome due to excessive thickness and require frequent readjustment, with mechanisms like the buckle in Patent literature 1 having vertically separated components that increase bulk and operation complexity, and the buckle in Patent literature 2 necessitating frequent adjustment of the pressing force.
Innovation Solution
A belt adjusting and holding device with a device body and a belt folding-back member that moves forward and backward, allowing easy length adjustment and secure fixation without excessive thickness, using protrusions and standing wall portions to bend and lock the belt in a stepped shape, eliminating the need for frequent readjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the belt folding-back part and the belt locking part are located vertically separately on the front surface side and the back surface side, then the belt can be securely locked, but the thickness of the buckle becomes excessively large
Solution Approach 1:
The patent combines the belt folding-back part and the belt locking part into a single integrated structure located at the same position, eliminating the need for vertical separation. The folding-back part creates a loop that is directly locked by the locking part within the same plane, thereby reducing buckle thickness while maintaining secure locking functionality.
Solution Approach 2:
The patent transitions from a vertical three-dimensional arrangement to a planar two-dimensional arrangement by positioning both the folding-back and locking mechanisms in the same horizontal plane rather than stacking them vertically, thus reducing the thickness dimension while preserving the locking function.
2Stability of the object's composition
If the belt folding-back part and the belt locking part are vertically separated, then the structure is stable, but the adjusting operation becomes troublesome and cumbersome
Solution Approach 1:
By merging the folding-back and locking operations into a single integrated mechanism, the user can adjust the belt length with one continuous motion rather than performing separate operations, significantly improving ease of adjustment while the integrated design maintains structural stability.
Solution Approach 2:
The patent segments the adjustment mechanism into distinct functional zones within the same plane - the folding-back section and the locking section - allowing independent optimization of each function while maintaining overall compactness and operational simplicity.
3Ease of operation
If the pressing force of the belt locking part is not maintained when the belt is not in use, then the belt can be easily adjusted, but the belt may be displaced and requires readjustment each time it is used
Solution Approach 1:
The patent incorporates a spring-loaded locking mechanism that automatically applies pressing force to maintain the belt in its adjusted position even when not in use. The spring pre-loads the locking part to continuously engage with the belt loop, preventing displacement while allowing easy readjustment by overcoming the spring force.
Solution Approach 2:
The spring mechanism automatically maintains the locking force without requiring user intervention, and the belt can be easily readjusted by simply pulling it to overcome the spring force, after which the spring automatically re-engages the locking mechanism to maintain position stability.
Data Source
Figure 1
Figure 2
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AI summary
The present invention comprises: a device main body (2) that has a belt insertion part (21) formed such that a belt (1) can be inserted thereinto and an opening part (22) communicating with the belt insertion part; and a belt folding-back member (3) that has a grasping part (32) and a folding-back part (31) formed such that the belt can be folded back in the opening part, the belt folding-back member being formed so as to be able to advance and retract within the device main body. Vertical wall parts (212T, 213T) standing stepwisely are formed on the upper and lower inner wall surfaces (212, 213) of the belt insertion part. A protrusion (33) that bends substantially stepwisely the belt between iteself and the vertical wall parts at a retracted position of the belt folding-back member and releases bending of the belt at an advanced position of the belt folding-back member is formed in the folding-back part.