Loudspeaker Rolling Suspension for Extended Excursion
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Solution Overview
Problem
Existing loudspeakers face limitations in excursion due to suspension devices, which can lead to breakages and increased size, compromising performance and complexity in non-axially symmetric designs.
Innovation Solution
A loudspeaker design featuring a movable radiator with a deformable ring made of elastomeric material that acts as a rolling pneumatic seal, allowing greater excursion without the need for larger suspension devices, thus maintaining compactness and reducing rocking phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional suspension devices are used to allow radiator movement, then the radiator can move relative to the basket, but the suspension devices limit the travel distance and are subject to frequent breakages
Solution Approach 1:
The patent removes the traditional suspension device entirely and replaces it with a rolling ring mechanism. The rolling ring is positioned in the liner between the radiator and basket, allowing the radiator to move freely along the longitudinal axis without the constraints of suspension devices, thereby eliminating both the travel limitation and breakage issues while maintaining reliable operation.
2Length of moving object
If larger suspension devices are used to increase the travel distance of the radiator, then the radiator can move further, but the overall dimensions of the loudspeaker are increased
Solution Approach 1:
The patent introduces a rolling ring that moves in a different dimensional mode (rolling motion) compared to traditional linear suspension devices. This allows the radiator to achieve greater travel distance along the longitudinal axis without increasing the radial dimensions of the loudspeaker, maintaining a compact overall size while enabling extended excursion.
3Ease of operation
If traditional suspension devices are used, then the radiator is supported and centered, but the device complexity increases and assembly becomes more difficult
Solution Approach 1:
The patent eliminates the complex suspension device structure entirely and replaces it with a simple rolling ring mechanism. This single component performs the functions of supporting and centering the radiator while significantly reducing device complexity and easing assembly, as the rolling ring can be simply positioned in the liner between the radiator and basket.
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 design enables increased excursion and reduced rocking, allowing for better performance and easier assembly, while maintaining a compact size and reducing the overall mass and inertia of the system.
Implementation Method 1
a ring made of deformable material, in particular plastic material, more specifically elastomeric material, is coaxial with the longitudinal axis and positioned inside the liner, so as to roll on the outside surface of the radiator and on the inside surface of the basket
Implementation Method 2
The ring is located inside the liner so as to be compressed by a predetermined quantity relative to a rest position
Implementation Method 3
a magnetic circuit, configured to generate a magnetic field and defining a path for the circulation of a magnetic field. The magnetic circuit includes a stationary magnetic element, connected to the basket. The magnetic circuit includes a movable magnetic element, connected to the radiator and movable under the action of the magnetic field, to move the radiator in response to an electrical signal to be transduced
Data Source
AI summary
Described is a loudspeaker (10) comprising: a radiator (1), movable along a longitudinal axis (X) for generating pressure waves; a basket (2), surrounding the radiator (1), so as to form a liner (C) between the radiator (1) and the basket (2), the liner (C) being delimited by an inside surface (201) of the basket (2) and an outside surface (101) of the radiator (1); a magnetic circuit (3), defining a path for the circulation of a magnetic field and including a stationary magnetic element (301), connected to the basket (2), and a movable magnetic element (302), connected to the radiator (1) and movable under the action of the magnetic field for moving the radiator (1) in response to an electrical signal to be transduced; a ring (4) made of elastomeric material, coaxial with the longitudinal axis (X) and positioned inside the liner (C), in contact with the outside surface (101) of the radiator (1) and the inside surface (201) of the basket (2) so as to roll on them, moving longitudinally in response to a relative movement between the radiator (1) and the basket (2).