Rotatable Seating Furniture with Form-Fitting Profile Blocking Device
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Solution Overview
Problem
Existing seating furniture with rotary mounting systems face challenges in creating a cost-effective and reliable switchable blocking device that ensures easy assembly and provides multiple engaging positions for the seating unit relative to the base, while avoiding complex and expensive solutions.
Innovation Solution
A form-fitting coupling mechanism using two profiles with axially movable inner and outer profiles, where the profiles are connected to the bearing devices in a rotationally fixed manner, allowing for a large number of engaging positions through a toothed design, and a switching carrier with a spring device for easy operation, which can be manually or automatically actuated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a form-fitting coupling mechanism with toothed profiles is used, then reliability and ease of assembly are improved, but device complexity increases due to the need for precise profile matching
Solution Approach 1:
The blocking device is segmented into two separate profiles (inner and outer) that can be manufactured independently and then assembled together. The inner profile is integrated with the switching carrier while the outer profile is integrated with the bearing device, allowing for simplified manufacturing of each component while achieving reliable form-fitting coupling when assembled.
2Adaptability or versatility
If multiple engaging positions are provided through toothed profiles, then adaptability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The coupling mechanism incorporates axial movability between the inner and outer profiles, allowing dynamic engagement and disengagement of the teeth. The spring device enables the profiles to move axially relative to each other, facilitating easy switching between different engaging positions without requiring extremely precise manufacturing tolerances for each tooth position.
3Ease of operation
If a spring device is used for axial movement of profiles, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The spring device is merged with the switching carrier to form an integrated assembly. The spring is positioned within the switching carrier and works in conjunction with the toothed profiles, eliminating the need for separate actuation mechanisms and reducing overall device complexity while maintaining ease of operation.
4Ease of manufacture
If the blocking device is made cost-effective by simplifying components, then ease of manufacture is improved, but reliability may deteriorate
Solution Approach 1:
The form-fitting coupling between the toothed profiles provides self-aligning and self-locking functionality. When the inner and outer profiles are assembled, the teeth automatically engage at the correct positions without requiring additional alignment features or complex assembly procedures, ensuring both ease of manufacture and reliable operation.
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 provides a reliable, cost-effective, and easy-to-assemble blocking device that ensures the seating unit can be securely locked in various positions, enhancing safety and usability, particularly with stand-up assistance functions.
Implementation Method 1
provision is made of a spring device (44) by means of which the switching carrier (42) is subjected permanently to a force in the direction of a first end position
Data Source
AI summary
A piece of seating furniture having a base and a seating unit, and a rotary mounting arrangement including a base-side bearing device and a seating-unit-side bearing device via which the seating unit is rotatable with respect to the base, and the rotary mounting arrangement has a switchable blocking device for blocking the rotatability of the bearing devices. The blocking device has two profiles including an inner profile attached to one of the two bearing devices in a rotationally fixed manner, and an outer profile attached to the other of the two bearing devices in a rotationally fixed manner. The outer profile and the inner profile are displaceable with respect to one another such that they are axially movable between an engaging relative position rotationally coupled in a form-fitting manner and a releasing relative position.