# US 12,216,325 B2 · Voice coil motor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,216,325 B2 - Document ID: US12216325B2 - Status: Granted - Kind: B2 - Application number: 18/598,489 - Filed: 2024-03-07 - Published: 2024-06-27 - Granted: 2025-02-04 - Earliest claimed: 2010-07-12 - Assignees: LG Innotek Co., Ltd. - Applicants: LG Innotek Co., Ltd. - Inventors: Sangjun Min; Sanghee Lee; Hyuneo Yoo; Seungki Kim; Jinsuk Han - Web page: https://patentgrep.com/patent/US12216325B2 ## CPC - G02B 7/04: with mechanism for focusing or varying magnification - G02B 7/02: for lenses {(supports for magnifying lenses G02B25/002)} - G03B 3/10: Power-operated focusing - G03B 13/34: Power focusing - H02K 41/031: {of the permanent magnet type} - H02K 41/0354: {Lorentz force motors, e.g. voice coil motors} - H02K 41/0356: {moving along a straight path} - G11B 7/00: Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation {by modifying optical properties or the physical structure}, reproducing using an optical beam at lower power {by sensing optical properties}; Record carriers therefor (G11B11/00, G11B13/00 take precedence) - H02K 41/03: Synchronous motors; Motors moving step by step; Reluctance motors (H02K41/035 takes precedence) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) ## Abstract A VCM (voice coil motor) is disclosed, the VCM including: a rotor including a cylindrical bobbin for accommodating a lens and protruded at a bottom end with a boss, and a coil block arranged at a periphery of the bobbin; a stator including a magnet facing the coil block and a yoke fixing the magnet; and an elastic member including a first elastic member formed with a through hole coupled to the boss of the bobbin and a second elastic member coupled to an upper end facing the bottom end of the bobbin; wherein the boss is formed with a disengagement prevention unit inhibiting the first elastic member from being disengaged from the boss, and the first elastic member is formed with a coupling unit contacting a joint where the disengagement prevention unit and the coupling unit meet. ## Claims ### Claim 1 A voice coil motor comprising: a base; a bobbin disposed above the base; a coil disposed on the bobbin; a magnet facing the coil; a first elastic member coupled to a lower surface of the bobbin; and an adhesive member coupling the bobbin and the first elastic member; wherein the first elastic member comprises an inner elastic unit coupled to the lower surface of the bobbin, an outer elastic unit disposed outside the inner elastic unit, and a connection elastic unit connecting the inner elastic unit and the outer elastic unit, wherein the inner elastic unit of the first elastic member comprises a first hole and a second hole, wherein the bobbin comprises a boss protruded from the lower surface of the bobbin, wherein the boss is inserted into the first hole and fused to couple the inner elastic unit and the bobbin, and wherein the adhesive member is disposed on the second hole to couple the inner elastic unit and the bobbin. ### Claim 2 (depends on 1) The voice coil motor of claim 1, wherein the boss is thermally fused. ### Claim 3 (depends on 1) The voice coil motor of claim 1, wherein each of the first hole and the second hole has a circular shape, and wherein a diameter of the first hole is larger than a diameter of the second hole. ### Claim 4 (depends on 1) The voice coil motor of claim 1, wherein the first hole comprises a plurality of first holes spaced apart from each other, wherein the second hole comprises a plurality of second holes spaced apart from each other, and wherein one of the plurality of first holes is formed closer to one of the plurality of second holes than it is to the remaining first holes. ### Claim 5 (depends on 3) The voice coil motor of claim 3, wherein the boss comprises a plurality of bosses, and wherein the plurality of bosses are spaced apart from the plurality of second holes. ### Claim 6 (depends on 3) The voice coil motor of claim 3, wherein the boss comprises a disengagement prevention unit covering a portion of a surface of the inner elastic unit. ### Claim 7 (depends on 1) The voice coil motor of claim 1, wherein a lower surface of the bobbin has a groove formed at a position corresponding to the second hole. ### Claim 8 (depends on 7) The voice coil motor of claim 7, wherein the adhesive member is disposed between the groove of the bobbin and the second hole. ### Claim 9 (depends on 1) The voice coil motor of claim 1, wherein the first elastic member comprises two elastic units spaced apart from each other, and wherein the coil is coupled to the two elastic units by a solder. ### Claim 10 (depends on 2) The voice coil motor of claim 2, wherein the adhesive member is a thermally curable adhesive or an ultraviolet curing adhesive. ### Claim 11 (depends on 1) A camera module comprising: an image sensor; the voice coil motor of claim 1; and a lens coupled to the bobbin of the voice coil motor. ### Claim 12 (depends on 11) A mobile phone comprising the camera module of claim 11. ### Claim 13 A voice coil motor comprising: a base; a bobbin disposed above the base; a coil disposed on the bobbin; a magnet facing the coil; a lower elastic member coupled to a lower surface of the bobbin; and an adhesive member coupling the bobbin and the lower elastic member; wherein the lower elastic member comprises a first elastic unit and a second elastic unit, wherein the first elastic unit comprises a first inner elastic unit coupled to the bobbin, a first outer elastic unit disposed outside the first inner elastic unit, and a first connection unit connecting the first inner elastic unit and the first outer elastic unit, wherein the second elastic unit comprises a second inner elastic unit coupled to the bobbin, a second outer elastic unit disposed outside the second inner elastic unit, and a second connection unit connecting the second inner elastic unit and the second outer elastic unit, wherein the first inner elastic unit comprises a first hole and a second hole, wherein the second inner elastic unit comprises a third hole and a fourth hole, wherein the bobbin comprises a first boss and a second boss protruded from one surface of the bobbin, wherein the first boss is inserted into the first hole and fused to couple the first inner elastic unit and the bobbin, wherein the second boss is inserted into the third hole and fused to couple the second inner elastic unit and the bobbin, wherein the adhesive member comprises a first adhesive member and a second adhesive member, wherein the first adhesive member is disposed on the second hole to couple the first inner elastic unit and the bobbin, and wherein the second adhesive member is disposed on the fourth hole to couple the second inner elastic unit and the bobbin. ### Claim 14 (depends on 13) The voice coil motor of claim 13, wherein each of the first hole and the second hole has a circular shape, and where a diameter of the first hole is larger than a diameter of the second hole. ### Claim 15 (depends on 13) The voice coil motor of claim 13, wherein each of the third hole and the fourth hole has a circular shape, and where a diameter of the third hole is larger than a diameter of the fourth hole. ### Claim 16 (depends on 13) The voice coil motor of claim 13, wherein the bobbin comprises a third boss and a fourth boss protruded from the lower surface of the bobbin, wherein the first inner elastic unit comprises a fifth hole and a sixth hole, wherein the second inner elastic unit comprises a seventh hole and an eighth hole, wherein the third boss is inserted into the fifth hole and thermally fused to couple the first inner elastic unit and the bobbin, wherein the fourth boss is inserted into the seventh hole and thermally fused to couple the second inner elastic unit and the bobbin, wherein the adhesive member comprises a third adhesive member and a fourth adhesive member, wherein the third adhesive member is disposed in the sixth hole to couple the first inner elastic unit and the bobbin, and wherein the fourth adhesive member is disposed in the eighth hole to couple the second inner elastic unit and the bobbin. ### Claim 17 (depends on 16) The voice coil motor of claim 16, wherein a distance between the first hole and the fifth hole is different from a distance between the second hole and the sixth hole. ### Claim 18 (depends on 16) The voice coil motor of claim 16, wherein the lower surface of the bobbin has a groove formed at a position corresponding to the second hole. ### Claim 19 (depends on 16) The voice coil motor of claim 16, wherein each of the first boss, the second boss, the third boss, and the fourth boss is thermally fused, and wherein the adhesive member is a thermally curable adhesive or an ultraviolet curing adhesive. ### Claim 20 A voice coil motor comprising: a base; a bobbin disposed above the base; a coil disposed on the bobbin; a magnet facing the coil; a first elastic member coupled to a lower surface of the bobbin; and an adhesive member coupling the bobbin and the first elastic member.