Connection joint
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Solution Overview
Problem
Users with special needs, such as physical disabilities, face challenges with limited adjustment possibilities in chair and backrest designs, leading to inadequate support and comfort, as custom-made solutions are time-consuming and expensive, and standard seats do not meet their requirements.
Innovation Solution
A connection member with a slidable base, washer, bushing, and spherical components that allow for unlimited adjustment possibilities, providing a flexible and secure attachment between the backrest or headrest and the chair frame, enabling vertical and tilt adjustments through a conical and spherical interface with a locking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If standard adjustment mechanisms are used for backrests and headrests, then the device complexity is reduced and ease of manufacture is improved, but the adaptability for users with special needs deteriorates due to limited adjustment possibilities
Solution Approach 1:
The connection mechanism employs dynamic components including a slidable base member that moves along a guide rail, a spherical member that rotates within a conical cavity, and a tilt mechanism with pivot points. These dynamic elements enable continuous adjustment of position and angle, providing unlimited adaptability for users with special needs while maintaining manageable device complexity through standardized component design
Solution Approach 2:
The connection mechanism is divided into distinct functional segments: a slidable base member for vertical adjustment, a spherical member for rotational movement, a tilt mechanism for angular adjustment, and a locking mechanism for position fixation. Each segment performs a specific adjustment function, allowing independent modification of each component to optimize adaptability without proportionally increasing overall device complexity
2Adaptability or versatility
If custom-made chairs are manufactured to meet special needs, then the adaptability and user comfort are improved, but the loss of time and manufacturing cost increase significantly
Solution Approach 1:
The connection mechanism is designed as a universal adjustment system that can accommodate various user needs through a single standardized component design. The slidable base, spherical member, and tilt mechanism work together to provide multiple adjustment capabilities (vertical position, rotation, tilt angle) that can be configured for different users without requiring custom manufacturing, thereby reducing both time and cost while maintaining high adaptability
3Adaptability or versatility
If a rigid fixed connection is used between backrest and chair frame, then the connection strength and reliability are improved, but the adaptability and user comfort deteriorate due to lack of adjustment possibilities
Solution Approach 1:
The connection mechanism transitions from a fixed rigid connection to a dynamic adjustable connection. The slidable base member allows vertical movement along the guide rail, the spherical member enables rotational adjustment, and the tilt mechanism provides angular adjustment. The locking mechanism secures these dynamic components in desired positions, maintaining connection reliability while providing continuous adaptability for user comfort
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 offers a versatile, adjustable, and secure connection that enhances user comfort by allowing for precise positioning and angle adjustments, ensuring a rigid and durable connection suitable for various users, including those with special needs.
Implementation Method 1
a washer (6) having at least one conical section (61) providing expansion means arranged at least partly inside said first slidable member (2) in the vicinity of the slits (25) adjacent the second end (23), where said conical section (61) is able to urge the first slidable member's portion provided with slits (25) outwards and expand beyond the circumference of the cylindrical section
Implementation Method 2
a first partly shaped spherical member (3), having a spherical part with an inner and an outer surface, said spherical part's outer surface adapted to be at least partly inserted in the conically shaped cavity of the first slidable member
Implementation Method 3
A first locking member (8) having an outer surface adapted to engage said inner surface of the first partly spherical member (3), and a threaded aperture, said threaded aperture is threadily engaged to; f. a threaded bolt (7)
Data Source
Figure 1
Figure 2~4
Figure 5
AI summary
Connection joint between a first member and a second member where said connection joint comprises: a. a first slidable base member, where said slidable base member in a first end has a first conically shaped cavity, and in a second end has a portion extending from the distal end towards the first end, where a plurality of slits are provided in said portion, where said first slidable base member between the first conically shaped cavity and said second end has a cylindrical cross-section orthogonal to a longitudinal direction of said first slidable base member, and where b. a washer having at least one conical section providing expansion means arranged at least partly inside said first slidable member in the vicinity of the slits adjacent the second end, where said conical section is able to urge the first slidable member's portion provided with slits outwards and expand beyond the circumference of the cylindrical section; c. a bushing arranged outside said first slidable member, such that the slidable member may slide relative to the bushing in an axial direction, and d. a first partly shaped spherical member (rød), having a spherical part with an inner and an outer surface, said spherical part's outer surface adapted to be at least partly inserted in the conically shaped cavity of the first slidable member, and said spherical parts inner surface being suitable to engage; e. a first locking member (bla) having an outer surface adapted to engage said inner surface of the first partly spherical member, and a threaded aperture, said threaded aperture is threadily engaged to; f. a threaded bolt, said bolt having a thread in one end engaging the thread of the locking member and a head section in the opposite engaging the washer, g. and where the first partly spherical member and the bushing or the washer comprises fastening means for fastening the first partly spherical member and the bushing or the washer to said first and second members.