US 11,057,713 B2 · Vibratable element for loudspeaker use and loudspeaker device

Abstract

A vibratable element for loudspeaker use including a coil bobbin, a voice coil attached thereto, and a main body being constituted by a single thin plate and including a fixing portion, a damper portion, a vibrating portion, and an edge portion. The fixing portion is a part of the plate to which the coil bobbin is fixed from one side in a first direction being the axial direction of the voice coil. The damper portion is a part of the plate located inside the fixing portion. The vibrating portion is a part of the plate located outside the fixing portion. The inside refers to a side toward the center of the plate, and the outside refers to a side away from the center of the plate. The edge portion is a part of the plate outside the vibrating portion and includes an outer perimeter portion of the plate.

Drawings

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Drawings

Claims17

Dependent claims

A vibratable element for loudspeaker use, the vibratable element comprising:

a coil bobbin;
a voice coil attached to the coil bobbin;
and
a main body constituted by a single thin plate, the main body including:
a fixing portion being a part of the thin plate to which the coil bobbin is fixed from one side in a first direction, the first direction being an axial direction of the voice coil,
a damper portion being a part of the thin plate located inside the fixing portion,
a vibrating portion being a part of the thin plate located outside the fixing portion, wherein the inside refers to a side toward the center of the thin plate and the outside refers to a side away from the center of the thin plate, and
an edge portion being a part of the thin plate outside the vibrating portion, the edge portion including an outer perimeter portion of the thin plate, wherein
the vibrating portion and the edge portion include a first curved portion generally of a ring shape when viewed from the other side in the first direction,
the first curved portion has a first pair of generally arc shapes in a cross-sectional view in the first direction, the first pair of generally arc shapes protruding to one or the other side in the first direction,
the damper portion includes a second curved portion generally of a ring shape when viewed from the other side in the first direction,
the second curved portion has a second pair of generally arc shapes in a cross-sectional view in the first direction, the second pair of generally arc shapes protruding to one or the other side in the first direction, and
the first and second curved portions have different spring constants from each other but have a substantially matched vibration system weight.

10 more elements

A vibratable element for loudspeaker use, the vibratable element comprising:

a coil bobbin;
a voice coil attached to the coil bobbin;
and
a main body constituted by a single thin plate, the main body including:
a fixing portion being a part of the thin plate to which the coil bobbin is fixed from one side in a first direction, the first direction being an axial direction of the voice coil,
a damper portion being a part of the thin plate located inside the fixing portion,
a vibrating portion being a part of the thin plate located outside the fixing portion, wherein the inside refers to a side toward the center of the thin plate and the outside refers to a side away from the center of the thin plate, and
an edge portion being a part of the thin plate outside the vibrating portion, the edge portion including an outer perimeter portion of the thin plate, wherein
the vibrating portion and the edge portion include a first curved portion generally of a ring shape when viewed from the other side in the first direction,
the first curved portion has a first pair of generally arc shapes in a cross-sectional view in the first direction, the first pair of generally arc shapes protruding to one or the other side in the first direction,
the damper portion includes a second curved portion generally of a ring shape when viewed from the other side in the first direction,
the second curved portion has a second pair of generally arc shapes in a cross-sectional view in the first direction, the second pair of generally arc shapes protruding to one or the other side in the first direction,
the first curved portion includes:
a first inner perimeter generally of a ring-shape,
a first outer perimeter generally of a ring-shape, and
a first vertex generally of a ring-shape,
the first vertex is positioned between the first inner perimeter and the first outer perimeter and outside a first midpoint,
the first midpoint is a midpoint of a linear distance from the first inner perimeter to the first outer perimeter,
the second curved portion includes:
a second inner perimeter generally of a ring-shape,
a second outer perimeter generally of a ring-shape, and
a second vertex generally of a ring-shape,
the second vertex is positioned between the second inner perimeter and the second outer perimeter and inside a second midpoint, and
the second midpoint is a midpoint of a linear distance from the second inner perimeter to the second outer perimeter.

21 more elements

A vibratable element for loudspeaker use, the vibratable element comprising:

a coil bobbin;
a voice coil attached to the coil bobbin;
and
a main body constituted by a single thin plate, the main body including:
a fixing portion being a part of the thin plate to which the coil bobbin is fixed from one side in a first direction, the first direction being an axial direction of the voice coil,
a damper portion being a part of the thin plate located inside the fixing portion,
a vibrating portion being a part of the thin plate located outside the fixing portion, wherein the inside refers to a side toward the center of the thin plate and the outside refers to a side away from the center of the thin plate, and
an edge portion being a part of the thin plate outside the vibrating portion, the edge portion including an outer perimeter portion of the thin plate, wherein
the vibrating portion and the edge portion include a first curved portion generally of a ring shape when viewed from the other side in the first direction,
the first curved portion has a first pair of generally arc shapes in a cross-sectional view in the first direction, the first pair of generally arc shapes protruding to one or the other side in the first direction,
the damper portion includes a second curved portion generally of a ring shape when viewed from the other side in the first direction,
the second curved portion has a second pair of generally arc shapes in a cross-sectional view in the first direction, the second pair of generally arc shapes protruding to one or the other side in the first direction,
the first curved portion includes:
a first inner perimeter generally of a ring-shape,
a first outer perimeter generally of a ring-shape, and
a first vertex generally of a ring-shape, wherein the first vertex is positioned between the first inner perimeter and the first outer perimeter and outside a first midpoint, and the first midpoint is a midpoint of a linear distance from the first inner perimeter to the first outer perimeter,
the second curved portion includes:
a second inner perimeter generally of a ring-shape,
a second outer perimeter generally of a ring-shape, and
a second vertex generally of a ring-shape, wherein the second vertex is positioned between the second inner perimeter and the second outer perimeter and inside a second midpoint, and the second midpoint is a midpoint of a linear distance from the second inner perimeter to the second outer perimeter, and
first distance:
second distance ≈ fourth distance:
third distance, where
a first imaginary line extending from the first inner perimeter to the first outer perimeter intersects at a first intersection with a second imaginary line extending from the first vertex in the first direction,
a third imaginary line extending from the second inner perimeter to the second outer perimeter intersects at a second intersection with a fourth imaginary line extending from the second vertex in the first direction, and
the first distance is a linear distance from the first inner perimeter to the first intersection, the second distance is a linear distance from the first intersection to the first outer perimeter, the third distance is a linear distance from the second inner perimeter to the second intersection, and the fourth distance is a linear distance from the second intersection to the second outer perimeter.

23 more elements

Dependencies are inferred from the claim text.

Description8,157 words

Summary2,162 words

#The present application claims priority under 35 U.S.C. § 119 of Japanese Patent Application No. 2019-036562 filed on Feb. 28, 2019, the disclosure of which is expressly incorporated by reference herein in its entirety.

#The invention relates to vibratable elements for loudspeakers and loudspeaker devices.

#Japanese Unexamined Patent Publication No. S58-111499 A describes a conventional vibratable element for loudspeaker use. The vibratable element includes a core material, a skin material, a cylindrical coil bobbin, and a voice coil. The core material is a wire cloth impregnated with a thermosetting resin, and includes a damper portion being an inner perimeter portion of the core material, an edge portion being an outer perimeter portion of the core material, and a middle portion. The skin material is aluminum foil or the like attached to the upper and lower surfaces of the middle portion of the core material. The coil bobbin is fixed to the outer peripheral edge of the damper portion. The voice coil is wound around the coil bobbin.

Brief description of the drawings9 figures

#The present invention can be even more fully understood with the reference to the accompanying drawings which are intended to illustrate, not limit, the present invention.

#FIG. 1A is a front, top, right side perspective view of a loudspeaker device according to a first embodiment of the invention.

#FIG. 1B is a back, bottom, right side perspective view of the loudspeaker device.

Detailed description5,808 words

#In the brief description of the drawings above and the description of embodiments which follows, relative spatial terms such as “upper”, “lower”, “top”, “bottom”, “left”, “right”, “front”, “rear”, etc., are used for the convenience of the skilled reader and refer to the orientation of the vibratable elements for loudspeakers, the loudspeaker devices, and their constituent parts as depicted in the drawings. No limitation is intended by use of these terms, either in use of the invention, during its manufacture, shipment, custody, or sale, or during assembly of its constituent parts or when incorporated into or combined with other apparatus.

#The following discussion is directed to various embodiments of the invention. It should be noted that elements of embodiments and their variants to be described can be combined in any possible manners.

#The following is a description of a loudspeaker device S (which may be hereinafter referred to simply as a loudspeaker S) according to a plurality of embodiments including a first embodiment of the invention, with reference to FIGS. 1A to 5. FIGS. 1A to 4B illustrate the loudspeaker S according to the first embodiment. FIG. 5 illustrates a first variant of the loudspeaker S according to the first embodiment.

Facts

Application

16/790,223Filed 13 Feb 2020

Priority

JP JP2019-03656228 Feb 2019

Published

US 2020/0280806 A13 Sep 2020

Granted

6 Jul 2021

Term ends

13 Feb 2040

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification7 codes

H04R 7/14
Non-planar diaphragms or cones: corrugated, pleated or ribbed
H04R 9/06
Transducers of moving-coil, moving-strip, or moving-wire type: loudspeakers
H04R 1/2811
Enclosures comprising vibrating or resonating arrangements: for loudspeaker transducers
H04R 7/26
Diaphragms for electromechanical transducers ; Cones: damping by means acting directly on free portion of diaphragm or cone

Timeline

28 Feb 2019Priority claimedJP JP2019-036562
13 Feb 2020Application filedUS 16/790,223
13 Feb 2020Assigned to Hosiden Corporationassignment of assignor's interest
3 Sep 2020PublishedUS 2020/0280806 A1
6 Jul 2021GrantedUS 11,057,713 B2
12 Oct 2026TodayWithin its term
13 Feb 2040Term endsEstimated

Vibratable element for loudspeaker use and loudspeaker device

Life of this patent

Vibratable element for loudspeaker use and loudspeaker device

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims17

Description8,157 words

Drawings

Classification7 codes

Life of this patent

Description8,157 words