Safety Hook With Relocated Closing-Off Body Operation
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Solution Overview
Problem
Workers wearing heavyweight rubber gloves, particularly in electrical construction, often have their gloves caught between the hook and open/close bar of existing safety hooks, making it difficult to operate the safety hook, especially when holding another tool.
Innovation Solution
A safety hook design featuring a closing-off body that swings about a first shaft, with a first and second arm part, and a lock member, allowing for easy operation without gloves or fingers getting sandwiched, using a helical torsion coil spring for urging and a bent part to facilitate opening, and a lock member operation part for securing the closing-off body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional open/close bar structure is used, then the hook can be opened and closed, but gloves or fingers get sandwiched between the distal end of the open/close bar and the distal end of the hook
Solution Approach 1:
The patent repositions the operation part from the distal end of the closing-off body to the base part, changing the spatial dimension of operation. This allows the worker to operate the hook from a position that does not risk sandwiching gloves or fingers between the closing-off body and hook part distal end.
Solution Approach 2:
The patent extracts the operation function from the distal end of the closing-off body and relocates it to the base part. This separation removes the harmful interaction zone from the operation area, eliminating the risk of gloves or fingers being sandwiched during operation.
2Volume of moving object
If the closing-off body is positioned close to the hook part distal end, then the hook structure is compact, but gloves or fingers are more likely to be caught between them
Solution Approach 1:
The patent changes the operational dimension by moving the operation part to the base part of the closing-off body. This allows the distal end of the closing-off body to remain close to the hook part distal end for compactness, while the operation occurs at a different location that eliminates the pinching hazard.
3Device complexity
If the operation part is located at the distal end of the closing-off body, then the structure is simple, but it is difficult to operate when wearing heavyweight rubber gloves
Solution Approach 1:
The patent relocates the operation part from the distal end to the base part of the closing-off body, changing the spatial dimension of operation. This provides better access for gloved hands and improves operability when wearing heavyweight rubber gloves, while maintaining structural simplicity.
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 design prevents gloves or fingers from getting caught between the hook and closing-off body, enabling smooth operation and enhanced safety by minimizing accidental opening or unlocking.
Implementation Method 1
a first urging member (30) for urging the closing-off body (20) from the open position toward the closing-off position
Data Source
Figure 1(A)~1(B)
Figure 2(A)~2(B)
Figure 3(A)~3(B)
AI summary
Provided is a safety hook in which gloves or fingers are not readily sandwiched between the distal-end part of a hook part and the distal-end part of a closing-off body. This safety hook is equipped with a hook part, a closing-off body supported by the hook part so as to be capable of swinging, and a first urging member for urging the closing-off body from an open position toward an closing-off position. The closing-off body comprises a closing-off-body base part, a first arm part capable of opening and closing the entrance of the hook part, and a second arm part extending in a direction different from that of the first arm part. The second arm part comprises a closing-off-body operation part. Operating the closing-off-body operation part causes the closing-off body to move from the closing-off position to the open position. Additionally, the safety hook is further equipped with a lock member for securing the closing-off body in the closing-off position, the lock member comprising a lock-member operation part for operating the lock member. Operating the lock-member operation part makes it possible to unlock the lock member from the closing-off body.