Foldable Salad Spinner Handle With Integrated Drive and Brake
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Solution Overview
Problem
Existing salad spinners require either application of force on the drive assembly or a separate brake system to stop the spinning operation, making them inconvenient and inefficient.
Innovation Solution
A salad spinner with a combined drive and brake mechanism featuring a rotary drive plate, circumferential tabs, a central hub member, and a movable brake pad, along with a foldable handle that allows for easy rotation and stopping of the inner basket by engaging or disengaging the brake pad with the drive plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate brake mechanism is added to stop the spin-drier basket rotation, then the stopping capability is improved, but the device complexity increases
Solution Approach 1:
The brake mechanism is merged with the drive assembly by integrating the brake pad into the existing drive plate structure. The brake pad is positioned to engage with the rim of the drive plate, allowing the same rotational component to serve both driving and braking functions. This eliminates the need for a completely separate brake mechanism while still providing effective stopping capability.
Solution Approach 2:
The drive plate is designed to serve multiple functions: it transmits rotational motion to the basket through its tabs and simultaneously provides a surface for the brake pad to engage for stopping the rotation. This multi-functionality reduces the overall number of components needed in the system.
2Ease of operation
If a manually depressible brake is provided for frictional engagement with the lid, then the stopping capability is improved, but the ease of operation deteriorates due to substantial effort required
Solution Approach 1:
A cam-actuated lever mechanism serves as an intermediary between the user's input force and the brake pad. The cam geometry provides mechanical advantage, allowing a small input force on the handle to generate a large braking force when the brake pad engages with the drive plate rim. This mediator amplifies the user's effort efficiently.
Solution Approach 2:
The brake mechanism uses a dynamic cam-actuated lever that transitions between engaged and disengaged positions. When the handle is rotated, the cam profile controls the engagement of the brake pad with the drive plate, providing progressive braking force. This dynamic mechanism allows for controlled stopping with minimal effort.
3Volume of moving object
If the handle is made foldable to reduce storage space, then the volume is improved, but the device complexity increases
Solution Approach 1:
The handle is segmented into two parts: a fixed portion attached to the lid and a movable portion that can rotate relative to the fixed portion. This segmentation allows the handle to be folded when not in use, reducing the overall volume of the salad spinner for storage. The segmentation is achieved through a simple rotational joint.
Solution Approach 2:
The handle incorporates a dynamic folding mechanism that allows it to transition between extended and folded positions. This dynamic capability enables the handle to adapt to different storage requirements without requiring a completely separate storage compartment or complex reconfiguration mechanism.
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 enables low-force activation, ergonomic design, and reduced storage space, providing ease of use and convenience in rotating and stopping the salad spinner without the need for additional braking effort.
Implementation Method 1
a brake assembly including a movable brake pad capable of engaging with the raised ring portion of the rotary drive plate
Implementation Method 2
a drive assembly engageable with the central hub member of the rotary drive plate for rotating the rotary drive plate which in turn rotates the inner basket by meshing engagement of the tabs with the ribs
Implementation Method 3
a drive assembly for rotating the basket to attain water removal by centrifuge action
Data Source
AI summary
A salad spinner is disclosed, comprising an outer bowl; an inner basket receivable in the outer bowl; a lid placed over the outer bowl; a drive and brake mechanism combination comprising a rotary drive plate, a drive assembly engageable with the rotary drive plate, and a brake assembly; and a foldable handle operatively connected with the drive and brake mechanism combination, wherein the handle is allowed to be folded up to a locked position where the brake assembly interferes with the rotary drive plate to prevent spinning operation of the inner basket, and to be opened to an unlocked position where the brake assembly disengages from the rotary drive plate and manipulation of the handle in a horizontal direction enables the drive assembly to cause rotation of the driving rotation of the rotary drive plate and the inner basket.