Embodiment
See also Fig. 1 to Fig. 3, the voice coil motor 10 that embodiment of the present invention provides, it comprises shell fragment 13a on a housing 11, the loam cake 12,, once shell fragment 13b, an active unit 14, a fixed cell 15, a load bearing seat 16 and a camera lens module 17.
Described housing 11 comprises that a upper wall 101 and four extend downward sidewall 102 from these upper wall 101 bendings.This upper wall 101 offers a central through hole 110, and this upper wall 101 and this four sidewalls 102 jointly surround a bottomless voice coil motor containing cavity and are used for accommodating described loam cake 12, upper shell fragment 13a, lower shell fragment 13b, active unit 14, fixed cell 15 and load bearing seat 16.In the present embodiment, described housing 11 can be made by magnetic shielding materials such as dilvals, to eliminate external electromagnetic to the interference of described voice coil motor 10 and to prevent the work of its external electronic components of electromagnetic effect of described voice coil motor 10.
Described loam cake 12 is roughly square structure, and four jiaos respectively arrange a upper location hole 121.In the present embodiment, described loam cake 12 adopts non-magnet_conductible material to make.
Described upper shell fragment 13a is square structure, and the center offers a light hole 130.Four the first location holes 131 are positioned at four corners of shell fragment 13a and away from described light hole 130.Have one first elastic part 130a around described light hole 130, offer four the second location holes 132 on described the first elastic part 130a.
The structural similarity of the structure of described lower shell fragment 13b and described upper shell fragment 13a: have 130 4 the first location holes 131 of a light hole, four the second location holes 132 and one first elastic part 130a.Four the first location holes 131 are positioned at four corners of lower shell fragment 13b and away from described light hole 130.
Described active unit 14 comprises an adjustable shelf 141 and a coil 142.Described adjustable shelf 141 has to accommodate the first spatial accommodation 1410 of the circle of described camera lens module 17.Described the first spatial accommodation 1410 is provided with internal thread 1413.Described adjustable shelf 141 is cube-shaped, and described coil 142 is wrapped on the periphery of described adjustable shelf 141.Four the second location hole 132 positions of described adjustable shelf 141 corresponding described upper shell fragment 13a are provided with four the first reference columns 1411.Four the second location hole 132 positions of described adjustable shelf 141 corresponding described lower shell fragment 13b are provided with four the second reference column 1412(as shown in Figure 4).
Described fixed cell 15 comprises a fixed mount 151 and four magnet 152.The shape of the shape of described fixed mount 151 and adjustable shelf 141 is roughly the same, and the geometric center of described fixed mount 151 has second spatial accommodation 1510 that holds active unit 14.
Described fixed mount 151 is arranged between described upper shell fragment 13a and the lower shell fragment 13b.Described fixed mount 151 is extended with four and goes up reference columns 1511 near the first location hole 131 of shell fragment 13a on the upper end correspondences of described upper shell fragment 13a is vertical with upper location hole 121 positions of described loam cake 12.Described four upper reference columns 1511 pass respectively the first location hole 131 of shell fragment 13a and stretch into the upper location hole 121 of loam cake 12, by gluing process upper shell fragment 13a are fixed between fixed mount 151 and the loam cake 12 again.The first location hole 131 positions of the corresponding described lower shell fragment 13b in bottom of described fixed mount 151 close described lower shell fragment 13b vertically are extended with four upper reference columns and offer four lower reference columns 1512.
In addition, offer respectively one on four of described fixed mount 151 sidewalls and put magnetic section 1513.Described four magnet 152 are separately positioned on to be put in the magnetic section 1513 and the coil 142 of corresponding described active unit 14.
Produce magnetic field force between the coil 142 of described magnet 152 and energising, magnetic field force drives described adjustable shelf 141 motions, and the described adjustable shelf 141 of motion drives camera lens module 17 together in the 1510 interior motions of the second spatial accommodation.Described loam cake 12 is used for when upper shell fragment 13a is subject to elastic deformation on the plane perpendicular to optical axis, describedly prevents that described camera lens module 17 from producing displacement on the plane perpendicular to optical axis.
Described load bearing seat 16 is cube structure, and it adopts plastic material to make.The corner location of described load bearing seat 16 respectively has a lower location hole 161.The center of described load bearing seat 16 offers one and runs through opening 160.The first location hole 131 that four lower reference columns 1512 of described fixed mount 151 pass respectively lower shell fragment 13b is fixed in the described lower location hole 161, so that described lower shell fragment 13b is fixed between fixed mount 151 and the load bearing seat 16.In the present embodiment, the first elastic part 130a of described lower shell fragment 13b drops on described running through in the opening 160 along the projection on the optical axis direction of voice coil motor 10.In the present embodiment, the described opening 160 that runs through is square, be appreciated that the described opening 160 that runs through also can be circular grade for other shape, as long as can make the first elastic part 130a of described lower shell fragment 13b can drop on described running through in the opening 160 along the projection on the optical axis direction of voice coil motor 10.
Described camera lens module 17 comprises a lens barrel 171 and a plurality of lens 172 that are housed in the described lens barrel 171.Be provided with the external screw thread 1710 that matches with the internal thread 1413 of described first spatial accommodation 1410 of described adjustable shelf 141 on the lateral wall of described lens barrel 171.In the present embodiment, be coated with colloid 18 between described external screw thread 1710 and the internal thread 1413, therefore, can prevent when assembling image sensor (not shown), dust between described external screw thread 1710 and the internal thread 1413 drops down onto on the described image sensor, affects the image quality of described image sensor.
In the present embodiment, the described light hole 130 that runs through the light hole 130 of opening 160, described lower shell fragment 13b, the second spatial accommodation 1510 of fixed mount 151, the first spatial accommodation 1410 of described adjustable shelf 141, described upper shell fragment 13a is (also namely, the geometric center of the described light hole 130 that runs through the light hole 130 of opening 160, described lower shell fragment 13b, the second spatial accommodation 1510 of fixed mount 151, the first spatial accommodation 1410 of described adjustable shelf 141, described upper shell fragment 13a is on a line) relative to each other just.
See also Fig. 2, Fig. 5 and Fig. 6, during assembling voice coil motor 10, the first location hole 131 with described lower shell fragment 13b is set on the lower reference column 1512 of described fixed mount 151 first, again described active unit 14 is placed on the lower shell fragment 13b, described adjustable shelf 141 four the second reference columns 1412 be housed in respectively in four the second location holes 132 of described lower shell fragment 13b, and by gluing process described lower shell fragment 13b and described adjustable shelf 141 are fixed, subsequently the lower reference column 1512 of described fixed mount 151 and the lower location hole 161 of described load bearing seat 16 are fastened, and by gluing process described lower shell fragment 13b is fixed between described fixed mount 151 and the described load bearing seat 16, described active unit 14 is housed in the second spatial accommodation 1510 of fixed mount 151, and described fixed mount 151 is carried on the described load bearing seat 16.
Subsequently, the first location hole 131 of described upper shell fragment 13a is set on the upper reference column 1511 of described fixed mount 151, subsequently the upper reference column 1511 of described fixed mount 151 and the upper location hole 121 of described loam cake 12 are fastened, and by gluing process described upper shell fragment 13a is fixed between described fixed mount 151 and the described loam cake 12, described adjustable shelf 141 four the first reference columns 1411 be housed in respectively in four the second location holes 132 of described upper shell fragment 13a, and by gluing process described upper shell fragment 13a and described adjustable shelf 141 are fixed, therefore, described adjustable shelf 141 is placed between described upper shell fragment 13a and the lower shell fragment 13b, so that described adjustable shelf 141 is suspended in the described fixed mount 151; Then lid is established described lid 11.External screw thread 1710 and described the first spatial accommodation 1410 internal threads 1413 bolts with the lens barrel 171 of described camera lens module 17.Lateral wall along described lens barrel 171 is coated with described colloid 18 so that described colloid 18 flows between described external screw thread 1710 and the described internal thread 1413.
Be understandable that the quantity of described upper location hole 121, the first location hole 131, upper reference column 1511, lower location hole 161 is identical and be not limited to four, it can design arbitrarily according to demand, as two, below three or four; The quantity of described the second location hole 132, the first reference column 1411 and the second reference column 1412 is identical and also be not limited to four, and it also can design arbitrarily according to demand, as two, below three or four.
In the present embodiment, because the first elastic part 130a of described lower shell fragment 13b drops on described running through in the opening 160 along the projection on the optical axis direction of voice coil motor 10, therefore, can avoid overflowing glue between described lower shell fragment 13b and described load bearing seat 16 time when sidewall that described colloid 18 carries over described lens barrel 171, cause the first elastic part 130a of described lower shell fragment 13b to be fixed on the load bearing seat 16 by described colloid 18, thereby cause the bad problem of voice coil motor 10 starts.
Although the present invention discloses as above with preferred embodiments,, it is not to limit the present invention, and in addition, those skilled in the art can also do other variation etc. in spirit of the present invention.Certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.