Household Vacuum Sealer Automatic Bag Rollback Mechanism
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Solution Overview
Problem
Existing household vacuum sealers are cumbersome to use due to the need to manually roll back vacuum packaging bags after cutting, requiring multiple operation steps and being inconvenient for users.
Innovation Solution
A household vacuum sealer with an automatic rollback shaft and elastic rollback mechanism that automatically rolls back the cut bag into the bag receiving chamber, reducing the number of operation steps and enhancing ease of use by integrating the cutting and heat sealing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cutter box and sliding cutter are mounted at the top surface of the upper hood, then the bag can be cut off, but the user must manually roll back the remaining bags which is cumbersome and requires multiple operation steps
Solution Approach 1:
The patent applies the self-service principle by implementing an automatic rollback mechanism that causes the bag roll to automatically return to the receiving cavity after cutting, eliminating the need for manual rollback operations by the user
Solution Approach 2:
The patent applies preliminary action by pre-positioning the bag roll on a rotatable shaft within the receiving cavity, and pre-configuring the automatic rollback mechanism, so that the system is ready to automatically return the bag roll without requiring user intervention during the cutting process
2Productivity
If the bag is pulled out by a longer length to reach the cutter, then the bag can be cut off, but the remaining bags must be manually rolled back which increases operation steps
Solution Approach 1:
The automatic rollback mechanism performs the rollback function automatically after cutting, eliminating the time-consuming manual rollback operation and reducing overall operation time
Solution Approach 2:
The bag roll is pre-positioned on a rotatable shaft with the automatic rollback mechanism already configured, enabling immediate automatic return after cutting without requiring additional manual operations
3Ease of manufacture
If both upper hood and lower hood are provided with heat-seal bars, then the bag ends can be heat sealed, but the structure becomes complex and cost increases
Solution Approach 1:
The patent applies the taking out principle by removing the heat-seal bar from the upper hood, keeping only the necessary heat-seal bar on the lower hood, thereby simplifying the overall structure and reducing manufacturing costs while maintaining the required heat sealing function
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 simplifies the operation of cutting and heat sealing vacuum packaging bags, automatically rolling them back after cutting, thereby reducing user effort and streamlining the process, making it more convenient and efficient.
Implementation Method 1
pressing tightly the bag by the upper hood locked onto the lower hood, abutting the unidirectional rotation limiting latch mounted on the lower hood by an unlocking rod fixed on the upper hood, such that the unidirectional rotation limiting latch unlocks the automatic rollback shaft which reversely rotates and strains the bag due to the torsion of the elastic rollback mechanism
Implementation Method 2
heat sealing the end portion of the bag by a heat-seal bar which is mounted on the lower hood, is located at the side of the evacuative groove and is configured to heat seal after evacuation
Implementation Method 3
the vacuum packaging bag is evacuated through the evacuative groove after a vacuum pump communicating with the evacuative groove is started
Data Source
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AI summary
The present invention discloses a household vacuum sealer and a bag-cutting sealing method. In the household vacuum sealer, at least one cutter device is slidably mounted on the upper hood, a heat-seal bar and an evacuative groove are arranged at the front side of the upper portion of the lower hood, the upper hood or the lower hood is provided with a bag receiving chamber, a detachable automatic rollback shaft is rotatably mounted in the bag receiving chamber, the elastic rollback mechanism for automatically rolling the rollback shaft back and the elastic unidirectional locking mechanism for locking the automatic rollback shaft are mounted at the end portion of the automatic rollback shaft; the cutter device protrudes from a bottom surface of the upper hood, and the cutter moves at one side of the heat-seal bar or one side of the evacuative groove back and forth after the upper hood is locked onto the lower hood, for cutting off the bag pressed tightly between the upper hood and the lower hood. The present invention has a simple structure since the bag is cut at the original heat-seal bar or the evacuative groove of the lower hood, which is more convenient. Subsequent to cutting off the bag, the vacuum packaging bags are automatically rolled back after the hood is opened, which reduces the number of operation steps for the user, and exhibits ease and quickness of operation.