Children's Chair Height-Triggered Folding Leg Frame
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Solution Overview
Problem
Conventional children's chairs require an additional supportive frame and direct operation of a folding device to fold, which can be cumbersome and inconvenient for users.
Innovation Solution
A children's chair design that incorporates a folding device allowing the front and rear leg frames to be folded by adjusting the seat height, eliminating the need for an additional supportive frame and enabling one-step folding through an actuator and locking mechanism integrated into the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an additional supportive frame is added to enable folding, then the folding function is achieved, but the device complexity increases
Solution Approach 1:
The patent removes the traditional transverse supportive frame from the children's chair structure. Instead, the folding function is achieved by directly connecting the front and rear leg frames through a folding device that utilizes the seat height adjustment mechanism, thereby eliminating the need for an additional supportive frame and reducing overall structural complexity.
Solution Approach 2:
The seat height adjustment mechanism serves dual functions: it adjusts the chair height for different usage needs and simultaneously acts as the folding device. The actuator, when moved to a lowest position, triggers the folding mechanism through the engaging device and locking device, allowing one component to perform multiple functions.
2Adaptability or versatility
If the first upper leg is slidable on the first lower leg for height adjustment, then the adaptability is improved, but the device complexity increases due to additional sliding and locking mechanisms
Solution Approach 1:
The sliding mechanism between the first upper leg and first lower leg serves dual purposes: it enables height adjustment for adaptability and simultaneously provides the folding function. The actuator's movement along the sliding path triggers the folding mechanism when it reaches the lowest position, allowing the same structural feature to support multiple functions without requiring separate mechanisms.
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
Enables easy and compact folding of the chair without requiring direct operation of a separate folding device, enhancing user convenience and simplifying the folding process.
Implementation Method 1
The first upper leg is slidable relative to the first lower leg
Implementation Method 2
a locking device disposed at the first lower leg and rotatably connected with the second leg frame for retaining the second leg frame at the unfolding position
Implementation Method 3
The second leg frame is rotatable relative to the first leg frame between an unfolding position and a folding position
Data Source
AI summary
Children's chair having a height adjusting device and a folding device completes folding up by height adjusting. A first leg frame of the children's chair includes a first upper leg and a first lower leg capable moving relatively. When operating the height adjusting device to adjust the first upper leg relative to the first lower leg, an actuator on the first upper leg pushes a slider of the folding device, which locates at the pivot of the first leg frame and a second leg frame. The slider then interferes with a coupler locating at the second leg frame to disengage from a base mounted on the first leg frame. The second leg frame is then rotatable relative to the first leg frame and may be folded to a folding position. The children's chair is easy to perform height adjustment and folding movement by simply operating a button at the handle.