# US 9,438,093 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 9,438,093 B2 - Document ID: US9438093B2 - Status: Granted - Kind: B2 - Application number: 14/354,053 - Filed: 2012-10-24 - Published: 2014-10-02 - Granted: 2016-09-06 - Earliest claimed: 2011-10-24 - Assignees: LG Innotek Co., Ltd. - Applicants: LG Innotek Co., Ltd. - Inventors: Seung Ki Kim; Sang Ok Park; Seong Min Lee - Web page: https://patentgrep.com/patent/US9438093B2 ## CPC - H02K 5/10: with arrangements for protection from ingress, e.g. water or fingers - G02B 7/022: {lens and mount having complementary engagement means, e.g. screw/thread} - G02B 7/04: with mechanism for focusing or varying magnification - G02B 7/08: adapted to co-operate with a remote control mechanism - G02B 27/0006: {with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation (G02B1/18 takes precedence; cleaning in general B08B)} - G03B 13/34: Power focusing - H02K 41/035: DC motors; Unipolar motors - H02K 41/0356: {moving along a straight path} - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - 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) ## Abstract A voice coil motor (VCM) is disclosed, the VCM including: a rotor including a bobbin accommodated by a lens, and a coil block arranged at a periphery of the bobbin, a base formed with an opening for exposing a lens and a first foreign object penetration prevention unit formed along an upper edge, a stator including magnets wrapping the coil block and a housing formed with an opening for fixing the magnets and formed at a bottom surface with lateral surfaces formed with a second foreign object penetration prevention unit coupled to the first foreign object prevention unit, and an elastic member coupled to the bobbin to elastically support the bobbin. ## Claims ### Claim 1 A VCM (Voice Coil Motor) comprising: a bobbin accommodated by a lens; a coil block arranged at a periphery of the bobbin; a base formed with an opening and a first foreign object penetration prevention unit formed along an upper edge; magnets wrapping the coil block; a housing formed with a second foreign object penetration prevention unit coupled to the first foreign object penetration prevention unit; and an elastic member coupled to the bobbin to elastically support the bobbin, wherein the first foreign object penetration prevention unit is protruded at the upper edge of the base, and the second foreign object penetration prevention unit is formed at a bottom surface of the housing in the shape of concave groove coupled to the first foreign object penetration prevention unit. ### Claim 2 (depends on 1) The VCM of claim 1, wherein the first foreign object penetration prevention unit is protruded in the shape of a closed loop. ### Claim 3 (depends on 1) The VCM of claim 1, wherein the first foreign object penetration prevention unit is protruded in the shape of a rib from the upper edge of the base. ### Claim 4 (depends on 1) The VCM of claim 1, further comprising a foreign object penetration prevention member interposed between the first foreign object penetration prevention unit and the second foreign object penetration prevention unit. ### Claim 5 (depends on 4) The VCM of claim 4, wherein the foreign object penetration prevention member includes an epoxy resin having a viscosity. ### Claim 6 (depends on 1) The VCM of claim 1, further comprising an adhesive interposed between the first foreign object penetration prevention unit and the second foreign object penetration prevention unit. ### Claim 7 (depends on 1) The VCM of claim 1, wherein an external surface of the lateral surface at the housing and an external surface of lateral walls of the base are arranged on a same planar surface. ### Claim 8 (depends on 1) The VCM of claim 1, wherein a bottom surface of the lateral surface at the housing contacts an upper surface of the base. ### Claim 9 (depends on 1) The VCM of claim 1, wherein a thickness of the lateral surface at the housing is formed with a thickness thicker than that of the first foreign object penetration prevention unit, and a part of the elastic member is interposed between the upper surface of the base and the lateral surface of the housing. ### Claim 10 (depends on 1) The VCM of claim 1, further comprising a yoke covering the housing and having an opening for exposing the lens, where a lateral wall of the yoke covers the lateral surface of the housing and the lateral wall of the base. ### Claim 11 (depends on 10) The VCM of claim 10, wherein the lateral wall of the yoke covers a border between the first and second foreign object penetration prevention units. ### Claim 12 A VCM (Voice Coil Motor) comprising: a bobbin accommodated by a lens; a coil block arranged at a periphery of the bobbin; magnets wrapping the coil block; a housing formed with a first jaw inhibiting penetration of a foreign object; an elastic member coupled to the bobbin to elastically support the bobbin; a base formed with an opening and a second jaw meshed with the first jaw formed at the housing; and a foreign object penetration prevention member interposed between the first jaw and the second jaw. ### Claim 13 (depends on 12) The VCM of claim 12, wherein the first jaw formed at a distal end of the lateral surfaces of the housing and the second jaw formed at the lateral walls of the base are coupled by being meshed together. ### Claim 14 (depends on 12) The VCM of claim 12, wherein an external surface of the lateral surface at the housing and an external surface of the lateral walls of the base are arranged on a same planar surface. ### Claim 15 (depends on 12) The VCM of claim 12, wherein a thickness of the lateral surfaces at the housing is same as a thickness of the lateral walls of the base. ### Claim 16 (depends on 12) The VCM of claim 12, wherein a part of the elastic member is fixed between the first and second jaws. ### Claim 17 (depends on 12) The VCM of claim 12, further comprising a yoke covering the housing and formed with an opening for exposing the lens, and a lateral wall of the yoke covers the lateral surfaces of the housing and the lateral walls of the base. ### Claim 18 A VCM (Voice Coil Motor), the VCM comprising: a bobbin accommodated by a lens; a coil block arranged at a periphery of the bobbin; a base formed with an opening and a first foreign object penetration prevention unit formed in a shape of a concave groove along an upper edge; magnets wrapping the coil block; a housing protrusively formed with a second foreign object penetration prevention unit coupled to the first foreign object penetration prevention unit; an elastic member coupled to the bobbin to elastically support the bobbin; and a foreign object penetration prevention member interposed between the first foreign object penetration prevention unit and the second foreign object penetration prevention unit. ### Claim 19 (depends on 18) The VCM of claim 18, further comprising an adhesive interposed between the first foreign object penetration prevention unit and the second foreign object penetration prevention unit.