# US 2018/0026508 A1 · Linear motor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0026508 A1 - Document ID: US20180026508A1 - Status: Published application - Kind: A1 - Application number: 15/412,340 - Filed: 2017-01-23 - Published: 2018-01-25 - Earliest claimed: 2016-07-21 - Assignees: AAC Technologies Pte. Ltd. - Inventors: Shun Guo; Lubin Mao - Web page: https://patentgrep.com/patent/US20180026508A1 ## CPC - H02K 33/18: with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets - H02K 1/17: Stator cores with permanent magnets - H02K 1/34: Reciprocating, oscillating or vibrating parts of the magnetic circuit - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A linear motor includes a housing with an accommodation space; a magnet assembly accommodated in the accommodation space, the magnet assembly including a main magnet unit and two auxiliary magnet units located on both sides of the main magnet unit for forming a magnetic gap; a vibration member accommodated in the accommodation space, the vibration member including a coil inserted into the magnetic gap and weights located at both sides of the coil; and a support member suspending the vibration member in the accommodation space, the support member including an elastic supporting member supporting the vibration member and a coil frame inserted into the magnetic gap. The coil frame is disposed between the coil and the auxiliary magnet units, and the coil is wound around a side surface of the coil frame opposite to the main magnet unit. ## Claims ### Claim 1 A linear motor comprising: a housing with an accommodation space; a magnet assembly accommodated in the accommodation space, the magnet assembly including a main magnet unit and two auxiliary magnet units located on both sides of the main magnet unit for forming a magnetic gap; a vibration member accommodated in the accommodation space, the vibration member including a coil inserted into the magnetic gap and weights located at both sides of the coil; a support member suspending the vibration member in the accommodation space, the support member including an elastic supporting member supporting the vibration member and a coil frame inserted into the magnetic gap; wherein the coil frame is disposed between the coil and the auxiliary magnet units, and the coil is wound around a side surface of the coil frame opposite to the main magnet unit. ### Claim 2 (depends on 1) The linear motor as described in claim 1, wherein the vibration member further comprises a connecting piece connecting the coil and the weights, the coil and the weights are sandwiched between the connecting piece and the elastic supporting member. ### Claim 3 (depends on 2) The linear motor as described in claim 2, wherein the connecting piece comprises a coil connecting section matched with the coil in shape and a weight connecting section extending in a direction from both ends of the coil connecting section to the weights, the coil is connected with the coil connecting section, the weight connecting section is connected with the weights. ### Claim 4 (depends on 3) The linear motor as described in claim 3, wherein the weight comprises a top face connecting the elastic supporting member, a bottom face opposite to the top face and a first limiting slot formed as concave from the bottom face to the top face, the first limiting slot is matched with the connecting piece in shape and accommodate the weight connecting section. ### Claim 5 (depends on 4) The linear motor as described in claim 4, wherein the coil frame is formed integrally with the connecting piece. ### Claim 6 (depends on 1) The linear motor as described in claim 1 further comprising a flexible circuit board attached to the elastic supporting member, the vibration member comprises a wire lead electrically connecting the voice coil and the flexible circuit board, the coil frame comprises a lead hole for outgoing of the wire lead. ### Claim 7 (depends on 1) The linear motor as described in claim 1, wherein the elastic supporting member comprises an installation section connecting with the vibration member and a deformation section provided symmetrically at both sides of the coil, the deformation section has one end connected with the installation section and another end fixed at the housing, the weight comprises a top face connecting the elastic supporting member, a bottom face provided opposite to the top face and a third limiting slot concave from the top face to the bottom face a third limiting slot formed as concave from the top face to the bottom face, the third limiting slot is corresponding with the deformation section which is suspended at the third limiting slot. ### Claim 8 (depends on 7) The linear motor as described in claim 7, wherein the installation section comprises a coil installation section matched and connected with the coil, the coil frame is connected with the coil installation section, the coil frame is formed integrally with the elastic supporting member. ### Claim 9 (depends on 7) The linear motor as described in claim 7, wherein the main magnet unit comprises main magnets and a main pole plate sandwiched between the main magnets, the auxiliary magnet unit comprises auxiliary magnets and an auxiliary pole plate sandwiched between the auxiliary magnets, the main magnets are two in number and configured with the same magnetic poles thereof opposed to each other, the auxiliary magnet unit are two in number, each of the auxiliary magnet unit comprises two auxiliary magnets configured with the same magnetic poles thereof opposed to each other.