Telescopic Cart Height Adjustment via Locking Teeth and Rails
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional tool carts have a fixed height, which is inconvenient for users who need to work at different positions, such as standing, sitting, or squatting, as they cannot adjust to accommodate varying user statures and working heights.
Innovation Solution
A telescopic cart with a storage unit, support unit, positioning unit, pressing control handle, and limit unit, allowing the height to be adjusted by locking and unlocking teeth on rails, enabling the cart to be positioned at different heights to accommodate users of varying stature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the cart has a fixed height structure, then the manufacturing is simple and stable, but it cannot accommodate users of different statures and working positions
Solution Approach 1:
The cart structure transitions from a fixed static design to a dynamic adjustable design. The support unit includes a first supporting frame and a second supporting frame that can relatively move, with the second frame telescoping along the first frame to enable height adjustment. This dynamic structure allows the cart to adapt to different user needs while maintaining operational stability through locking mechanisms.
Solution Approach 2:
The cart is divided into modular components: a storage unit, a support unit with separable frames, a positioning unit with locking mechanisms, and a control unit. The support unit is further segmented into a first supporting frame and a second supporting frame that can independently move relative to each other, enabling flexible height adjustment while keeping the overall structure manageable.
2Adaptability or versatility
If the cart structure is simplified for easy manufacture, then the manufacturing cost is reduced, but the height adjustment function cannot be achieved
Solution Approach 1:
The cart employs a dynamic telescopic structure where the second supporting frame can move along the first supporting frame. This is achieved through guide shafts that constrain the movement path and positioning pieces with locking teeth that engage with locking grooves on the rails, providing adjustable height functionality through relatively simple mechanical components.
Solution Approach 2:
The design incorporates positioning springs that apply elastic force to pre-load the locking mechanism, ensuring that the locking teeth are forced into the locking grooves to position the support unit. This pre-positioning mechanism simplifies the manufacturing by using spring-loaded engagement rather than complex actuated locking systems.
3Ease of operation
If the cart has a fixed height, then the structure is stable and simple, but it causes inconvenience for users at different working positions such as standing, sitting, or squatting
Solution Approach 1:
The cart features a dynamic height adjustment capability where the second supporting frame can telescope along the first supporting frame. The positioning unit includes locking pieces with locking teeth that engage with locking grooves at different heights on the rails, allowing users to adjust the cart height to match their working position whether standing, sitting, or squatting.
Solution Approach 2:
The control button is pivotally connected and provided with a recess that receives a pressing control handle. When the handle is pressed, it controls the unlocking of the positioning pieces through a linking lever mechanism, allowing users to easily adjust the height without complex controls. The positioning springs automatically engage the locking teeth into the locking grooves when the handle is released.
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 telescopic cart facilitates users of different heights to easily access items at various working positions by allowing adjustable height settings, enhancing usability and convenience.
Implementation Method 1
The torsion spring is biased between the base plate and the control button
Implementation Method 2
Each of the two positioning springs is mounted on the sliding rod and has a first end pressing an upper edge of one of the two driving pieces and a second end pressing a top of the bottom channel. Each of the two positioning springs applies an elastic force which forces the at least one locking tooth of each of the two positioning pieces into the locking grooves of one of the two rails to position the support unit.
Implementation Method 3
The main section is provided with a slideway. The secondary section is provided with a plurality of locking grooves extending in a lengthwise direction of the slideway.
Data Source
AI summary
A telescopic cart includes a storage unit, a support unit, a positioning unit, a pressing control handle, a limit unit, and a handle. The support unit includes a first supporting frame and a second supporting frame which are pivotally connected. The first supporting frame is pivotally connected with the storage unit. The second supporting frame is slidably connected with the storage unit. The positioning unit is used to position the first supporting frame and the second supporting frame without different angles defined therebetween, so that the storage unit is located at different height.