# US 2019/0170208 A1 · Voice coil actuator and sensing driver module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170208 A1 - Document ID: US20190170208A1 - Status: Published application - Kind: A1 - Application number: 15/829,414 - Filed: 2017-12-01 - Published: 2019-06-06 - Earliest claimed: 2017-12-01 - Inventors: Yun-Hui LIU - Web page: https://patentgrep.com/patent/US20190170208A1 ## CPC - F16F 15/005: {using electro- or magnetostrictive actuation means (generating of mechanical vibrations operating with electrostriction B06B1/06, with magnetostriction B06B1/08; vehicle suspension arrangements characterised by use of piezoelectric elements B60G17/01941; piezoelectric, electrostrictive and magnetostrictive devices per se H10N30/00)} - F16F 15/007: {Piezoelectric elements being placed under pre-constraint, e.g. placed under compression} - H02K 11/21: Devices for sensing speed or position, or actuated thereby (specially adapted for machines having non-mechanical commutating devices H02K29/06, H02K29/14) - H02K 41/0356: {moving along a straight path} - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A voice coil actuator and a sensing driver module are provided. A cover body of the voice coil actuator is connected with a body base to form receiving space. A magnetic element is arranged in the receiving space. A rotor assembly has a rotor, a first elastic element and a pressing element. the rotor is arranged opposite to the magnetic element and has a hole and a first side, the pressing element is arranged in the hole, a first end of the pressing element is curved and protrudes beyond the hole, the first elastic element is arranged on the first side, a third end of the first elastic element abuts against the magnetic element, and a fourth end is located in the hole and abuts against a second end of the pressing element. A coil is connected with the rotor. ## Claims ### Claim 1 A voice coil actuator, including: a body base; a cover body, connected to the body base to form a receiving space; a magnetic element, arranged within the receiving space; a rotor assembly, arranged within the receiving space, having a rotor, a first elastic member and a pressing element, the rotor being arranged opposite to the magnetic element and having a hole and a first side, the pressing element being arranged in the hole and having a first end and a second end which is opposite to the first end, the first end being curved and protruding beyond the hole, the first elastic element being arranged on the first side and having a third end and a fourth end which is opposite to the third end, the third end abutting against the magnetic element, the fourth end being located within the hole and abutting against the second end; and a coil, annularly arranged around a circumference of the magnetic element and connected to the rotor. ### Claim 2 (depends on 1) The voice coil actuator of claim 1, further including: a yoke, arranged within the receiving space and annularly arranged around the circumference of the magnetic element, the coil being located between the magnetic element and the yoke; and a positioning frame, connected to the cover body and the yoke, the rotor assembly being located by an inner side of the positioning frame. ### Claim 3 (depends on 2) The voice coil actuator of claim 2, further including: a supporting element, annularly arranged around a circumference of the rotor, respectively connected to the rotor and the positioning frame; and a packing element, arranged by an inner side of the positioning frame, the supporting element being sandwiched between the positioning frame and the packing element. ### Claim 4 (depends on 3) The voice coil actuator of claim 3, wherein the rotor assembly further has a ball, a locking element and a second elastic element, at least one lateral side of the rotor has a through hole, the ball is arranged within the through hole and abuts against a groove on a side of the pressing element, the locking element is arranged within and tightly fitted into the through hole, and the second elastic element is arranged between the ball and the locking element. ### Claim 5 A sensing driver module, including: a voice coil actuator, having: a body base; a cover body, connected to the body base to form a receiving space; a magnetic element, arranged within the receiving space; a rotor assembly, arranged within the receiving space, having a rotor, a first elastic member and a pressing element, the rotor being arranged opposite to the magnetic element and having a hole and a first side, the pressing element being arranged in the hole and having a first end and a second end which is opposite to the first end, the first end being curved and protruding beyond the hole, the first elastic element being arranged on the first side and having a third end and a fourth end which is opposite to the third end, the third end abutting against the magnetic element, the fourth end being located within the hole and abutting against the second end; and a coil, annularly arranged around a circumference of the magnetic element and connected to the rotor; an accelerometer, tightly fitted into the voice coil actuator, the accelerometer for measuring an axial vibration and outputting a vibration signal; wherein the voice coil actuator controls the rotor assembly to move according to the vibration signal so as to counter the axial vibration. ### Claim 6 (depends on 5) The sensing driver module of claim 5, wherein the accelerometer has a base, a mass block, at least three elastic element sets, a piezoelectric element and a first damping element, the base has a pressing portion on the axial direction, the mass block has a first side and a second side which is opposite to the first side, each of the at least three elastic element sets includes a first elastic element, a second elastic element and a prepressing adjusting element, the first elastic element is arranged on the first side of the mass block, the second elastic element is arranged on the second side of the mass block, the prepressing adjusting element is disposed through the first elastic element, the mass block and the second elastic element, the piezoelectric element is arranged between the mass block and the base, the piezoelectric element has a first side which is toward the pressing portion and a second side which is opposite to the first side, the first damping element is arranged on at least one of two sides of the piezoelectric element, and when the mass block moves on the axial direction, the pressing portion of the base make the piezoelectric element produce a deformation. ### Claim 7 (depends on 5) The voice driver module of claim 5, wherein the voice coil actuator further has a yoke and a positioning frame, the yoke is arranged within the receiving space and annularly arranged around the circumference of the magnetic element, the coil is located between the magnetic element and the yoke, the positioning frame is connected to the cover body and the yoke, and the rotor assembly is located by an inner side of the positioning frame. ### Claim 8 (depends on 7) The sensing driver module of claim 7, wherein the voice coil actuator further has a supporting element and a packing element, the supporting element is annularly arranged around a circumference of the rotor, the supporting element is respectively connected to the rotor and the positioning frame, the packing element is arranged by an inner side of the positioning frame, and the supporting element is sandwiched between the positioning frame and the packing element. ### Claim 9 (depends on 8) The sensing driver module of claim 8, wherein the rotor assembly further has a ball, a locking element and a second elastic element, at least one lateral side of the rotor has a through hole, the ball is arranged within the through hole and abuts against a groove on a side of the pressing element, the locking element is arranged within and tightly fitted into the through hole, and the second elastic element is arranged between the ball and the locking element. ### Claim 10 (depends on 6) The sensing driver module of claim 6, wherein a side of the body base has at least three protrusions and a recess, the accelerometer is tightly fitted into the recess, and the at least three protrusions are evenly arranged.