# US 11,115,754 B2 · Actuator

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- Number: US 11,115,754 B2
- Document ID: US11115754B2
- Status: Granted
- Kind: B2
- Application number: 16/683,754
- Filed: 2019-11-14
- Published: 2020-05-21
- Granted: 2021-09-07
- Earliest claimed: 2018-11-20
- Assignees: EM-TECH Co., Ltd.
- Applicants: EM-TECH Co., Ltd.
- Inventors: Cheon Myeong Kim; Jeong Ae Ha; Kyeong Min Lee
- Web page: https://patentgrep.com/patent/US11115754B2

## CPC

- H04R 1/021: {incorporating only one transducer}
- H04R 9/06: Loudspeakers
- H01F 7/081: {Magnetic constructions}
- H01F 7/126: Supporting or mounting
- H02K 33/02: with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
- H02K 41/0354: {Lorentz force motors, e.g. voice coil motors}
- H04R 1/025: {Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture}
- H04R 3/00: Circuits for transducers (arrangements for producing a reverberation or echo sound G10K15/08; amplifiers H03F)
- H04R 9/025: {Magnetic circuit}
- H05K 5/006: {characterized by features for holding the PCB within the housing}
- H01F 2007/086: {Structural details of the armature}
- H04R 2400/03: Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones
- H04R 2499/11: Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

An actuator is provided that is attached to an electronic device and configured to generate sound and vibration. The actuator includes: a first casing having sidewalls and a bottom; a second casing affixed to the first casing and forming a top; a printed circuit board attached to the first casing and configured to transmit a signal; a voice coil configured to receive the signal from the printed circuit board; and a vibrator configured to vibrate by an electromagnetic force produced through an interaction with the voice coil. The first casing forms a surface that is attached to the electronic device.

## Claims

### Claim 1

An actuator that is attached to an electronic device and configured to generate sound and vibration, the actuator comprising:
a first casing having sidewalls and a bottom, wherein a part of a sidewall of the first casing is removed;
a second casing affixed to the first casing and forming a top;
a printed circuit board attached to the second casing and configured to transmit a signal, wherein the printed circuit board comprises an extension that is extended and pulled out of a space formed by the first casing and the second casing and through the removed part of the sidewall of the first casing, and a land portion configured for an electrical connection with an external power source;
a voice coil configured to receive the signal from the printed circuit board;
an L-shaped auxiliary plate attached to an outer side of the first casing so that the printed circuit board is pulled out and fixed to the electronic device; and
a vibrator configured to vibrate by an electromagnetic force produced through an interaction with the voice coil,
wherein the first casing has a higher rigidity than the second casing since the first casing has the sidewalls and the bottom as one body that forms a surface that is attached to the electronic device,
wherein the extension is pulled out through the removed part of the sidewall of the first casing and is fixed to the L-shaped auxiliary plate.

### Claim 2 (depends on 1)

The actuator of claim 1, wherein the L-shaped auxiliary plate is fixed to the first casing.

### Claim 3

An actuator that is attached to an electronic device and configured to generate sound and vibration, the actuator comprising:
a first casing having sidewalls and a bottom, wherein a part of a sidewall of the first casing is removed;
a second casing affixed to the first casing and forming a top;
a printed circuit board attached to the second casing and configured to transmit a signal, wherein the printed circuit board comprises an extension that is extended and pulled out of a space formed by the first casing and the second casing and through the removed part of the sidewall of the first casing, and a land portion configured for an electrical connection with an external power source;
a voice coil configured to receive the signal from the printed circuit board; and
a vibrator configured to vibrate by an electromagnetic force produced through an interaction with the voice coil,
wherein the first casing has a higher rigidity than the second casing since the first casing has the sidewalls and the bottom as one body that forms a surface that is attached to the electronic device,
wherein the second casing further has an extension and an attachment,
wherein the extension of the second casing is formed by bending a part of the second casing in an L-shape and attached to where the sidewall of the first casing is removed,
wherein the attachment is attached to the electronic device,
wherein the extension of the second casing has a pull-out hole,
wherein the extension of the printed circuit board is pulled out through the pull-out hole and fixed to the extension of the second casing.

### Claim 4

An actuator that is attached to an electronic device and configured to generate sound and vibration, the actuator comprising:
a first casing having sidewalls and a bottom, wherein a part of a sidewall of the first casing is removed;
a second casing affixed to the first casing and forming a top;
a printed circuit board attached to the second casing and configured to transmit a signal, wherein the printed circuit board comprises an extension that is extended and pulled out of a space formed by the first casing and the second casing and through the removed part of the sidewall of the first casing, and a land portion configured for an electrical connection with an external power source;
a voice coil configured to receive the signal from the printed circuit board; and
a vibrator configured to vibrate by an electromagnetic force produced through an interaction with the voice coil,
wherein the first casing has a higher rigidity than the second casing since the first casing has the sidewalls and the bottom as one body that forms a surface that is attached to the electronic device,
wherein the first casing further has an extension formed by extending a bottom of the sidewall-removed area further outward,
wherein the second casing further has an extension formed by bending and extending a part of the second casing downward,
wherein the extension of the second casing is attached to where the sidewall of the first casing is removed,
wherein the extension of the second casing has a pull-out hole,
wherein the extension of the printed circuit board is pulled out through the pull-out hole and fixed to the extension of the first casing and the extension of the second casing.

### Claim 5

An actuator that is attached to an electronic device and configured to generate sound and vibration, the actuator comprising:
a first casing having sidewalls and a bottom, wherein a part of a sidewall of the first casing is removed;
a second casing affixed to the first casing and forming a top;
a printed circuit board attached to the second casing and configured to transmit a signal, wherein the printed circuit board comprises an extension that is extended and pulled out of a space formed by the first casing and the second casing and through the removed part of the sidewall of the first casing, and a land portion configured for an electrical connection with an external power source;
a voice coil configured to receive the signal from the printed circuit board;
a vibrator configured to vibrate by an electromagnetic force produced through an interaction with the voice coil; and
an auxiliary supporter with a protrusion for holding the extension of the printed circuit board that is attached to the bottom of the first casing,
wherein the first casing has a higher rigidity than the second casing since the first casing has the sidewalls and the bottom as one body that forms a surface that is attached to the electronic device,
wherein the extension of the printed circuit board is pulled out between the first casing and the second casing and attached to the sidewalls of the first casing and the auxiliary supporter.