Speaker and electronic apparatus

Patent metadata

Field	Value
Publication number	US-2024314476-A1
Application number	US-202117927338-A
Country	US
Kind code	A1
Filing date	May 24, 2021
Priority date	Jun 1, 2020
Publication date	Sep 19, 2024
Grant date	—

Abstract

There is provided a speaker, including: a diaphragm that includes a surface-layer member that has a first surface and a second surface on a side opposite to the first surface, a plurality of drive points used as a reference for transmission of vibrations being set at predetermined positions of the second surface, and a reinforcing member that includes a plurality of first reinforcing portions and one or more second reinforcing portions and is connected to the second surface of the surface-layer member, the plurality of first reinforcing portions being formed in a vicinity of the respective plurality of drive points, the one or more second reinforcing portions being formed to connect, in a state of being spaced apart from the second surface, between the plurality of first reinforcing portions.

First claim

1 . A speaker, comprising:
a diaphragm that includes
a surface-layer member that has a first surface and a second surface on a side opposite to the first surface, a plurality of drive points used as a reference for transmission of vibrations being set at predetermined positions of the second surface, and
a reinforcing member that includes a plurality of first reinforcing portions and one or more second reinforcing portions and is connected to the second surface of the surface-layer member, the plurality of first reinforcing portions being formed in a vicinity of the respective plurality of drive points, the one or more second reinforcing portions being formed to connect, in a state of being spaced apart from the second surface, between the plurality of first reinforcing portions.

2 . The speaker according to claim 1 , further comprising:
an actuator that generates a vibration; and a plurality of transmission members that is disposed on a side of the second surface with reference to the plurality of drive points and transmits the vibration generated by the actuator to the diaphragm, wherein the first surface has a planar shape, and each of the plurality of transmission members transmits a vibration along a direction perpendicular to the first surface to the diaphragm.

3 . The speaker according to claim 2 , wherein
the plurality of drive points is set at positions of nodes of a natural vibration generated in the surface-layer member.

4 . The speaker according to claim 2 , wherein
the plurality of first reinforcing portions holds the plurality of transmission members.

5 . The speaker according to claim 2 , wherein
one or more natural-vibration suppression points are set at predetermined positions of the second surface, the speaker further comprising one or more natural-vibration suppression portions that are disposed on a side of the second surface with reference to the one or more natural-vibration suppression points and connected to the diaphragm.

6 . The speaker according to claim 2 , wherein
the one or more natural-vibration suppression portions are formed such that no tension along a direction perpendicular to the first surface is applied to the surface-layer member.

7 . The speaker according to claim 5 , wherein
the one or more second reinforcing portions are formed at positions facing the one or more natural-vibration suppression points.

8 . The speaker according to claim 5 , wherein
the one or more natural-vibration suppression portions include a vibration damping member disposed between the second surface and the second reinforcing portion.

9 . The speaker according to claim 5 , wherein
the one or more natural-vibration suppression points are set at positions of antinodes of a natural vibration generated in the surface-layer member.

10 . The speaker according to claim 3 , wherein
the natural vibration is at least one of a natural vibration of a (2,0)+(0,2) mode or a natural vibration of a (2,2) mode.

11 . The speaker according to claim 1 , wherein
the reinforcing member is formed by assembling a first member including the first reinforcing portion and a second member including the second reinforcing portion.

12 . The speaker according to claim 5 , wherein
the plurality of drive points is four drive points set to be symmetrical with respect to a center of the second surface, the plurality of first reinforcing portions is four first reinforcing portions formed to surround the respective four drive points, and the one or more second reinforcing portions are four second reinforcing portions including two second reinforcing portions extending in a first direction and two second reinforcing portions extending in a second direction perpendicular to the first direction.

13 . The speaker according to claim 12 , wherein
the surface-layer member has a rectangular shape as viewed from a direction perpendicular to the first surface, the rectangular shape having two side portions whose main direction is the first direction and two side portions whose main direction is the second direction.

14 . The speaker according to claim 12 , wherein
the one or more natural-vibration suppression points are set at a center of the second surface and a center of adjacent two drive points of the four drive points.

15 . The speaker according to claim 1 , wherein
the surface-layer member is formed of a metal material, a material having a property of suppressing a higher-order natural vibration mode, or a material having high decorativeness.

16 . The speaker according to claim 1 , wherein
the surface-layer member has at least one of an image display function or a lighting function.

17 . The speaker according to claim 1 , further comprising
a substrate for driving the actuator, the substrate being installed on the reinforcing member.

18 . The speaker according to claim 1 , wherein
the reinforcing member is formed by assembling a first member including the first reinforcing portion and a second member including the second reinforcing portion, and the diaphragm includes a shielding part that is connected to each of a peripheral edge portion of the surface-layer member and a peripheral edge portion of the first member and shields an inside of the speaker from an outside air.

19 . The speaker according to claim 1 , wherein
the first member includes one or more through holes extending along a direction perpendicular to the first surface, and the diaphragm includes a pin member that is connected to the second surface of the surface-layer member and disposed to penetrate the one or more through holes of the first member.

20 . An electronic apparatus, comprising:
a speaker including a diaphragm that includes
a surface-layer member that has a first surface and a second surface on a side opposite to the first surface, a plurality of drive points used as a reference for transmission of vibrations being set at predetermined positions of the second surface, and
a reinforcing member that includes a plurality of first reinforcing portions and one or more second reinforcing portions and is connected to the second surface of the surface-layer member, the plurality of first reinforcing portions being formed in a vicinity of the respective plurality of drive points, the one or more second reinforcing portions being formed to connect, in a state of being spaced apart from the second surface, between the plurality of first reinforcing portions; and
a control unit that controls driving of the speaker.

Assignees

• Sony Group Corp

Inventors

• Shinmen Naoki
• Nomoto Koya
• Kamata Masaki
• Nakata Akihiro

Classifications

• H04R17/00

  Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00}) · CPC title

• H04R9/063

  using a plurality of acoustic drivers (H04R1/24 and H04R1/403 take precedence) · CPC title

• H04R7/06

  comprising a plurality of sections or layers · CPC title

• H04R7/26 Primary

  Damping by means acting directly on free portion of diaphragm or cone (air damping H04R1/28) · CPC title

• H04R1/02 Primary

  Casings; Cabinets {; Supports therefor;} Mountings therein (H04R1/28 takes precedence {; attachments for microphones H04R1/08; mounting of transducers in earpieces H04R1/1075}) · CPC title