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US 11,700,479 B2Granted
Acoustic device
AssigneeAlps Alpine Co., Ltd.
InventorRyo Ito
Life of this patent
Estimating the term…
Abstract
An acoustic device includes a main body case, a vibrating body provided inside of the main body case, a magnetic circuit unit disposed in front of the vibrating body in a sound emitting direction of the vibrating body, a coil located inside of a magnetic gap of the magnetic circuit unit, a bobbin configured to support the coil and vibrate along with the vibrating body, and a damper configured to connect the main body case to the bobbin. The damper is disposed in the rear of the vibrating body, and a damper regulation unit is provided in the rear of the damper at a position facing the damper.
Claims17
An acoustic device comprising:
- a main body case;
- a vibrating body provided inside of the main body case;
- a magnetic circuit unit disposed in front of the vibrating body;
- a coil located inside of a magnetic gap of the magnetic circuit unit;
- a bobbin configured to support the coil and vibrate along with the vibrating body;
- and
- a damper configured to connect the main body case to the bobbin,
- wherein the damper is disposed in the rear of the vibrating body,
- wherein a damper regulation unit is provided in the rear of the damper at a position facing the damper, the amplitude of vibration of at least one of the vibrating body and the bobbin being restricted by the damper contacting the damper regulation unit, and
- wherein an outer circumference of the damper is fixed to a damper support portion, and a distance that the coil moves rearward when the damper moves from a neutral position thereof until colliding with the damper regulation unit is less than a distance that the coil moves rearward when the vibrating body moves from a neutral position thereof until colliding with the damper support portion.
7 more elements
An acoustic device comprising:
- a main body case;
- a vibrating body provided inside of the main body case;
- a magnetic circuit unit disposed in front of the vibrating body;
- a coil located inside of a magnetic gap of the magnetic circuit unit;
- a cylindrical bobbin configured to support the coil and vibrate along with the vibrating body;
- and
- a damper configured to connect the main body case to the bobbin,
- wherein the damper is disposed in the rear of the vibrating body,
- wherein the inner circumference of the damper is bonded and fixed to the outer circumferential surface of the bobbin,
- wherein a damper regulation unit is provided in the rear of the damper at a position facing the damper and on the radially outer side of the bobbin, the amplitude of vibration of at least one of the vibrating body and the bobbin being restricted by the damper contacting the damper regulation unit, and
- wherein a distance that the coil moves rearward when the damper moves from a neutral position thereof until colliding with the damper regulation unit is less than a distance that the coil moves forward when the bobbin moves from a neutral position thereof until colliding with the magnetic circuit unit.
8 more elements
An acoustic device comprising:
- a main body case including a front case portion and a rear case portion;
- a vibrating body provided inside of the main body case, where the vibrating body has the shape of a cone and tapers rearward;
- a magnetic circuit unit fixed to a rear surface of the front case portion facing rearward and disposed in front of the vibrating body;
- a coil located inside of a magnetic gap of the magnetic circuit unit;
- a cylindrical bobbin configured to support the coil and vibrate along with the vibrating body;
- and
- a damper configured to connect the main body case to the bobbin,
- wherein the damper is disposed in the rear of the vibrating body,
- wherein the inner circumference of the damper is bonded and fixed to the outer circumferential surface of the bobbin,
- wherein a damper regulation unit is provided in the rear of the damper at a position facing the damper and on the radially outer side of the bobbin, the amplitude of vibration of at least one of the vibrating body and the bobbin being restricted by the damper contacting the damper regulation unit, and
- wherein a distance that the coil moves rearward when the damper moves from a neutral position thereof until colliding with the damper regulation unit is less than a distance that the coil moves forward when the vibrating body moves from a neutral position thereof until colliding with the magnetic circuit unit.
8 more elements
Dependencies are inferred from the claim text.