Sprinkler Center Bracket Cam Lock to Prevent Lever Loosening
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Solution Overview
Problem
Conventional center brackets for fire sprinklers face difficulties in rapid and easy coupling due to the center bracket door not sliding opposite the rotational coupling point, leading to unlocking issues when high torque is applied, resulting in a broken coupling between the center bracket and door.
Innovation Solution
A sprinkler center bracket with a locker for preventing unlocking of the cam lever, featuring a locker body that rotates about a fixing member, includes a locker protrusion and spring protrusion with an elastic spring, which inserts into a locker protrusion catching recess of the cam protrusion tight-contact unit, preventing unlocking in the opposite direction and allowing easy locking and unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the center bracket door is rotated about the hinge pin without sliding, then the coupling is simple, but the coupling strength is insufficient and breaks under high torque
Solution Approach 1:
The cam lever is designed to perform a compound motion: rotation about the hinge pin combined with sliding along the guide groove. This dynamic movement transforms the simple rotational coupling into a dynamic coupling process that achieves both ease of operation and strong coupling. The sliding action during rotation ensures the cam surface maintains optimal contact with the cam protrusion, distributing torque effectively and preventing coupling failure.
2Reliability
If the cam lever is rotated to fix the sprinkler, then the sprinkler is secured, but the cam protrusion tight-contact unit can be unlocked in the opposite direction
Solution Approach 1:
The guide groove acts as an intermediary constraint that controls the movement of the cam lever. By designing the guide groove with a specific shape that widens in the locking direction and narrows or blocks in the unlocking direction, it mediates between the cam lever's rotational motion and the locking requirement. This intermediary structure allows easy locking through rotation while preventing unauthorized unlocking, thus resolving the contradiction between locking reliability and ease of operation.
3Strength
If the center bracket uses a split structure with bolts, then the sprinkler can be firmly fixed, but the fastening process is troublesome and time-consuming
Solution Approach 1:
The invention extracts and eliminates the bolt fastening mechanism from the center bracket assembly. Instead of using separate bolts to secure the sprinkler, the design integrates the locking function directly into the cam lever mechanism. The cam lever, when rotated, directly engages with the cam protrusion to secure the sprinkler, removing the need for additional fastening operations and significantly reducing installation time while maintaining strong fixation.
Solution Approach 2:
The invention merges the positioning and fastening functions into a single cam lever operation. The cam lever simultaneously performs the function of positioning the sprinkler and securing it through the cam-protrusion engagement. This consolidation of multiple functions into one component and one motion eliminates the need for separate fastening steps, resolving the contradiction between strong fixation and fast installation.
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 solution effectively prevents the cam protrusion tight-contact unit from unlocking in the opposite direction after the cam lever is rotated, ensuring secure fixation of the sprinkler and allowing for easy confirmation and release of the locked state.
Implementation Method 1
an elastic spring (60) is installed on the spring protrusion (30)
Data Source
AI summary
Provided is a center bracket for fixing a fire sprinkler and, more particularly, to a sprinkler center bracket having a one-touch-type structure, to which a locker for preventing loosening of a cam lever is coupled. When a locker protrusion is inserted into a locker protrusion hook groove formed in one end portion of a cam protrusion contact portion, wherein the locker protrusion is rotated about a fixing tool of the locker for preventing loosening of the cam lever as a central axis of rotation, the cam lever is rotated in a locking direction in order to fix the sprinkler, and after this, loosening of the cam protrusion contact portion in a direction opposite to the locking direction can be prevented, the cam protrusion contact portion being fixed by an elastic spring hinge pin after the cam lever is rotated in the locking direction to fix the sprinkler.