Lens driving device, camera device, and electronic apparatus

A camera device, comprising:

• a lens driving device;
• and
• a lens supported by a lens holder of the lens driving device, wherein
• the lens driving device includes:
• a tubular tens holder configured to support a lens therein;
• a frame that has a base including a bottom plate expanding orthogonal to an optical axis of the lens and a base side wall with an outer surface which base side wall extends parallel to the optical axis of the lens so as to surround a periphery of the lens holder, and a cover including a cover side wall with an inner surface so as to surround around the outer surface of the base side wall;
• a magnet mounted on the lens holder;
• a coil mounted on the base side wall of the base so as to oppose against the magnet;
• and
• a planar magnetic member mounted on the frame so as to oppose against the magnet with the coil being interposed between the magnet and the planar magnetic member, wherein
• the lens holder has a first guide passage and a second guide passage that are formed at outer peripheral portions thereof and are separated from each other in a direction orthogonal to the optical axis direction of the lens;
• the frame has a first elongated support member and a second elongated support member each having a bottom end being upstanding from the bottom plate, an upper opposite end, and a columnar body extending parallel to the optical axis all the way from the bottom end to the upper opposite end;
• wherein
• the first guide passage has an upper contact passage and a lower contact passage that are separated from each other in the optical axis direction of the lens;
• the second guide passage has an intermediate contact passage formed at a height relatively between the upper contact passage and the lower contact passage in the optical axis direction of the lens;
• the columnar body of the first elongated support member is received in the first guide passage and is in contact with the first guide passage at least at two points respectively at the upper contact passage and the lower contact passage in a cross section orthogonal to the optical axis direction of the lens;
• the columnar body of the second elongated support is received in the second guide passage and is in contact with the intermediate contact passage at least at two points in a cross section orthogonal to the optical axis direction of the lens, thereby forming a support mechanism that supports the lens holder so as to be freely movable relative to the frame in the optical axis direction of the lens;
• the planar magnetic member has an inner side surface that is fixed to the outer surface of the base side wall, an outer side surface that is closely attached to the inner surface of the cover side wall, and an upper fixing portion bent from an upper end of the planar magnetic member;
• and
• the upper opposite end of the first elongated support member and the second elongated support member are fixed to the upper fixing portion of the planar magnetic member so as to be supported by the planar magnetic member that is held between the outer surface of the base side wall and the inner surface of the cover side wall at both the inner side surface and the outer side surface of the planar magnetic member.

An electronic apparatus, comprising a camera device including a lens driving device;

• and a lens supported by a lens holder of the lens driving device, wherein
• the lens driving device including:
• a tubular lens holder configured to support a lens therein;
• a frame that has a base including a bottom plate expanding orthogonal to an optical axis of the lens and a base side wall with an outer surface which base side wall extends parallel to the optical axis of the lens so as to surround a periphery of the lens holder, and a cover including a cover side wall with an inner surface so as to surround around the outer surface of the base side wall;
• a magnet mounted on the lens holder;
• a coil mounted on the base side wall of the base so as to oppose against the magnet;
• and
• a planar magnetic member mounted on the frame so as to oppose against the magnet with the coil being interposed between the magnet and the planar magnetic member, wherein
• the lens holder has a first guide passage and a second guide passage that are formed at outer peripheral portions thereof and are separated from each other in a direction orthogonal to the optical axis direction of the lens;
• the frame has a first elongated support member and a second elongated support member each having a bottom end being upstanding from the bottom plate, an upper opposite end, and a columnar body extending parallel to the optical axis all the way from the bottom end to the upper opposite end;
• wherein
• the first guide passage has an upper contact passage and a lower contact passage that are separated from each other in the optical axis direction of the lens;
• the second guide passage has an intermediate contact passage formed at a height relatively between the upper contact passage and the lower contact passage in the optical axis direction of the lens;
• the columnar body of the first elongated support member is received in the first guide passage and is in contact with the first guide passage at least at two points respectively at the upper contact passage and the lower contact passage in a cross section orthogonal to the optical axis direction of the lens;
• the columnar body of the second elongated support member is received in the second guide passage and is in contact with the intermediate contact passage at least at two points in a cross section orthogonal to the optical axis direction of the lens, thereby forming a support mechanism that supports the lens holder so as to be freely movable relative to the frame in the optical axis direction of the lens;
• the planar magnetic member has an inner side surface that is fixed to the outer surface of the base side wall, and an outer side surface that is closely attached to the inner surface of the cover side wall, and an upper fixing portion bent from an upper end of the planar magnetic member;
• and
• the upper opposite end of the first elongated support member and the second elongated support member are fixed to the upper fixing portion of the planar magnetic member so as to be supported by the planar magnetic member that is held between the outer surface of the base side wall and the inner surface of the cover side wall at both the inner side surface and the outer side surface of the planar magnetic member.