CN105429419A - Voice coil motor capable of being centered accurately - Google Patents
Voice coil motor capable of being centered accurately Download PDFInfo
- Publication number
- CN105429419A CN105429419A CN201511006323.2A CN201511006323A CN105429419A CN 105429419 A CN105429419 A CN 105429419A CN 201511006323 A CN201511006323 A CN 201511006323A CN 105429419 A CN105429419 A CN 105429419A
- Authority
- CN
- China
- Prior art keywords
- plane spring
- lens mount
- voice coil
- coil motor
- lower plane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- 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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lens Barrels (AREA)
Abstract
The invention discloses a voice coil motor capable of being centered accurately, which comprises a housing, a lens holder, a coil, a magnet, and a lower plane spring, wherein the housing is formed by a base and an upper shell, and the upper part and the lower part of the housing are provided with light transmitting holes; the lens holder is arranged inside the housing; the coil sleeves the outer wall of the side surface of the lens holder; the magnet whose position is corresponding to that of the coil is arranged on the inner wall of the upper shell; the lower plane spring is connected with the lower end surface of the lens holder and the base; the lower end surface of the lens holder is provided with positioning bulges with the same distances with the center of the lower end surface; the base is provided with positioning grooves with the same distances with the center of the base; the lower plane spring is provided with inner holes and outer holes whose positions are corresponding to those of the positioning bulges and the positioning grooves respectively; the distances between the inner holes and the center of the lower plane spring are the same; and the distances between the outer holes and the center of the lower plane spring are the same. The die precision improvement field does not need lots of cost input, accurate centering is realized through certain positioning mechanism, the product has higher centering precision, and the assembly and processing process is more convenient.
Description
Technical field
The present invention relates to the auto-focusing voice coil motor in camera module, this auto-focusing voice coil motor can act in the middle of mobile phone, panel computer, automobile, digital camera, cell-phone function and intelligent high technology equipment.
Background technology
Day by day universal along with high-pixel camera modules such as 5MegaPixel, 8MegaPixel, 13MegaPixel, make the camera function of the electronic products such as mobile phone and camera function from strength to strength, simultaneously also also more and more higher to the requirement as the linear actuating device realizing camera lens automatic focusing function in camera module.
The similar linear actuating device adopted in existing domestic and international miniature camera comprises: the housing be made up of upper fixed support and lower fixed support, the yoke be arranged in housing, be arranged on for installing the lens mount of camera lens, being fixed on the coil of lens mount side in yoke, the upper plane spring and the lower plane spring that are connected at lens mount two ends respectively, to be arranged on yoke inwall the interactional magnetite with coil with upper fixed support, lower fixed support.Wherein lens mount, coil assembly are rotor, and the assembly such as magnetite, yoke is stator, and rotor can relative stator move under the effect of upper and lower plane spring, is completed lens drive unit, i.e. a voice coil motor by stator and rotor assembly.
But said structure is in the end in a step overall package process, i.e., in the assembling process of stator and rotor, be difficult to ensure that stator is consistent with the center of rotor and the lens axis of camera lens.If inconsistent with optical axis, lens supporter and lens, toward tilting or translation, cause driver operationally, and lens supporter and lens can move not smooth or produce deflection angle.This can produce great impact to the image quality of camera.Therefore, need in prior art do a large amount of accurate tool or improve upper and lower fixed support mould and die accuracy, significantly increase production cost.
Summary of the invention
The present invention is in order to solve the problem of above-mentioned prior art, propose a kind of can the voice coil motor of accurate centering, comprise: the shell up and down with loophole be made up of base and upper casing, lens mount is in the enclosure set, be sleeved on the coil on the outer wall of lens mount side, be arranged on magnet corresponding with coil position on upper casing inwall, the lower plane spring of connection lens seat lower surface and base, described lens mount lower surface is provided with the equidistant positioning convex apart from its center, described base is provided with the equidistant detent apart from its center, described lower plane spring is respectively equipped with and described positioning convex, the endoporus that detent position is corresponding, exit orifice, the centre distance of described interior pitch-row lower plane spring is equal, the centre distance of described outer pitch-row lower plane spring is equal.
In a preferred embodiment, described lower plane spring is by being fixedly connected with base Intermediate gasket; Describedly Intermediate gasket is comprised to the many support columns being distributed in lens mount periphery, connect each support column upper end in turn and form the intercell connector of framework, framework and the upper casing lower surface of described support column upper end are inconsistent, the lower end of described support column and lower plane spring and base inconsistent, and be provided with can through the bottom protrusion of described exit orifice and detent in its lower end.
Described lower plane spring comprises: two the interior intercell connectors be oppositely arranged respectively, be arranged on outer intercell connector outside interior intercell connector and relative with two that interior intercell connector staggers, the two ends of described outer intercell connector are connected respectively by the two ends of the elater bent back and forth with interior intercell connector, and one end of described two outer intercell connectors is provided with two pins with lower plane spring place plane orthogonal.
Described voice coil motor also comprises the upper plane spring connected Intermediate gasket and lens mount upper surface, described upper plane spring with the coupling part of Intermediate gasket is provided with multiple apart from the equidistant through hole in its center, described being provided with Intermediate gasket can through the top bump of described through hole.
Described upper plane spring comprises: the inner ring be connected with lens mount upper surface, is connected and the outer shroud concentric with inner ring with upper casing lower surface, between described inner and outer rings by inner and outer rings institute planar bend back and forth elater connection.
Further, the upper surface of described lens mount is provided with multiple slot being positioned at coil evenly and at intervals, and the lower surface of described upper casing is provided with the inserted block that can insert in slot, and the gap between described inserted block and slot forms U-lag, may be used for dust-proof.
Be respectively equipped with two openings bottom two opposite flanks of described upper casing, array processing can be realized.
A specific embodiment of the technical program can adopt focusing coil, and coil winding is on lens mount outer wall, and the outer wall of described lens mount is provided with two the hanging wire blocks can fixing focusing coil two the end of a thread respectively.
The present invention does not need to prepare a large amount of accurate tools to realize the accurate centering of rotor and stator, by detent, projection, location hole, the centering of stator and rotor is easily achieved by monolithic devices spring etc., simultaneously, the present invention is improving on the dust-proof of product and rich line, make product have well anti-dropping, dust-proof effect, and the efficiency adding man-hour have also been obtained lifting.
Accompanying drawing explanation
Fig. 1 is the explosive view of one embodiment of the invention;
Fig. 2 is the upward view of the present invention to Intermediate gasket;
Fig. 3 is the structural representation of plane spring in the present invention;
Fig. 4 is the structural representation of lower plane spring of the present invention;
Fig. 5 is the cutaway view of one embodiment of the invention;
Fig. 6 is the elevated bottom perspective view of lens mount;
Fig. 7 is the top perspective view of lens mount;
Fig. 8 is the elevated bottom perspective view of upper casing;
Fig. 9 is the separation machining sketch chart of upper casing array.
Embodiment
Below in conjunction with drawings and Examples, describe structure of the present invention and principle in detail.
Fig. 1 is one embodiment of the present of invention, and be an auto-focusing voice coil motor be square in this embodiment, it comprises upper casing 1, to Intermediate gasket 2, upper plane spring 3, magnet 4, lens mount 5, lower plane spring 6, base 7.Those skilled in the art also can at circular, polygonal voice coil motor, or does not limit on the automatic stabilization voice coil motor of shape and be out of shape accordingly, and these distortion all should belong in the protection range of this patent.
Upper casing 1 and base 7 form the shell of voice coil motor, and base 7 is metal yoke, can shield the interference of external magnetic field to voice coil motor internal magnetic field.Base 7 and upper casing 1 are equipped with loophole, the camera lens on loophole alignment mirror headstock 5.
Lens mount 5 is used for fixing camera lens, and light can pass the loophole on base 7 again from the loophole of upper casing 1 through camera lens.The outer wall of lens mount is fixed wtih coil 8, the inwall of upper casing 1 is fixed wtih the magnet 4 corresponding with coil 8 position, magnet 4 pairs of coils 8 interact, active force along optical axis direction is formed to lens mount 5, lens mount 5 is driven to realize focusing, in order to make lens mount 5 can free movement in the enclosure, the upper surface of lens mount 5 be connected with to Intermediate gasket 2 by upper plane spring 3, and the lower surface of lens mount 5 is connected with base 7 by lower plane spring 6.
Fig. 2 is the upward view to Intermediate gasket, four support columns 21 being distributed in lens mount 5 periphery and the intercell connector connecting four support column 21 upper ends are in turn comprised to Intermediate gasket 2, four intercell connectors form a framework 22 between upper casing 1 lower surface and upper plane spring 3, support column 21 is connected with framework 22 is vertical, the framework 22 of support column 21 upper end is inconsistent with upper casing 1 lower surface, the lower end of support column 21 can with lower plane spring 6 and base 7 inconsistent, firmly block in the enclosure.Support column 21 and framework 22 are respectively equipped with four bottom protrusion f1-f4 and four top bump e1-e4.Top bump and bottom protrusion distance are equal respectively to the distance at Intermediate gasket center, are used for carrying out centering to upper plane spring 3 and lower plane spring 6 respectively spacing.
Fig. 3 is the structural representation of upper plane spring, the concrete structure of the upper plane spring 3 of the present embodiment comprises the inner ring 31 that can be connected with lens mount 5 upper surface, and the outer shroud 32 that can be connected with upper casing 1 lower surface, the center superposition of inner and outer rings, namely two rings are concentric, then connected by elater between inner and outer rings again, form a global facility, elater planar bends back and forth in inner and outer rings, and inner and outer rings can be made to move back and forth along optical axis relative to each other.Corner on outer shroud is provided with four through hole g1-g4, and these four through holes are corresponding with to the top bump position of Intermediate gasket, can grafting mutually during assembling, makes can realize fixing the position of upper plane spring 3 to Intermediate gasket 2.
Fig. 4 is the structural representation of lower plane spring, lower plane spring 6 comprises two the interior intercell connectors 61 be oppositely arranged respectively, two interior intercell connectors 61 are all curved, surround the circle of a non-closed, two relative outer intercell connectors 62 are also provided with outside interior intercell connector 61, outer intercell connector 62 linearly shape, two outer intercell connectors 62 are parallel to each other, and their position and interior intercell connector stagger mutually, that is, two outer intercell connectors form the square frame of a non-closed, then two interior intercell connectors are positioned on the diagonal of square frame, not parallel with outer intercell connector.The two ends of outer intercell connector 62 are connected respectively by the two ends of the elater bent back and forth with interior intercell connector 61, make lower plane spring 6 form a global facility, and one end of two outer intercell connectors 62 is provided with two pins 63 with lower plane spring place plane orthogonal.Interior intercell connector is provided with endoporus i1-i4, and outer intercell connector is provided with four exit orifice h1-h4, and four endoporus i1-i4 are equal apart from the centre distance of lower plane spring 6, and four exit orifice h1-h4 are also equal apart from the centre distance of lower plane spring 6.
Fig. 5 is the cutaway view of the voice coil motor assembled, directly do not contact because lens mount 5 and shell are two and there is the individual components of relative motion, therefore usually the optical axis of lens mount and the center complete matching of shell cannot all be said in prior art, solution of the present invention arranges four positioning convex j1-j4 in lens mount 5 lower surface, these positioning convex j1-j4 is equal apart from the distance at lens mount 5 center, base is arranged four detent k1, and these detents are equal apart from the centre distance of base, the hole i1-i4 of lower plane spring 6, exit orifice h1-h4 respectively with positioning convex j1-j4, detent k1 position is corresponding.And then by lower plane spring 6 and base 7 being fixed to Intermediate gasket 2, closely linked, realize the accurate centering of lens mount 5 and shell.And on each global facility the equidistant positioning convex of machining center, detent, interior exit orifice, through hole etc., processing method is very simple comparatively speaking, nor can increase cost, also makes product more convenient when assembling.
Fig. 6 is the bottom view of lens mount, the voice coil motor of the present embodiment is autofocus motor, coil 8 only has a coil of focusing, this focusing coil winding is on the outer wall of lens mount 5, the outer wall of lens mount 5 is provided with two hanging wire block a1-a2 that can fix focusing coil two the end of a thread respectively, being fastened of start line and last line when the structure of hanging wire block a1, a2 can be used for coiling, thus make coiling processing more convenient.
Fig. 7 is a stereogram of lens mount, each structure seeing lens mount 5 upper surface can be known, Fig. 8 is the stereogram of upper casing, each structure seeing upper casing lower surface and bottom can be known, the upper surface of lens mount 5 is provided with the slot b1-b4 that four are positioned at coil evenly and at intervals, the lower surface of upper casing 1 is provided with the inserted block d1-d4 that can insert in slot, gap between inserted block d1-d4 and slot b1-b4 forms U-lag, the structure of U-lag clearly can be seen from Fig. 5, dust is entered by black arrow outside, through inserted block d1, enter slot b1 chamber portion, chamber portion due to slot b1 has been separated to form a U-lag, dust precipitates or up advances in U-type groove, gravitate continues to fall after rise to U-lag again, thus the U-shaped space formed is dust-proof, better protection product.In addition, after the matching of slot b1-b4 and inserted block d1-d4, their relative sides mutually limit to be formed and prevent rotor relative stator from enclosing the structure rotated on optical axis.In the process fallen, because the side of slot b1-b4 and inserted block d1-d4 limits the drop resistance that more ensure that product mutually.
In addition, as shown in Figure 9, two openings are respectively equipped with bottom the individual opposite flank of upper casing 1, four opening c1-c4 altogether, opening c1-c4 is that whole product is in the key Design realizing a direction assembling, the tie point of metal clips and lower metal clips frame under being that opening c1-c4 matches, this purposes connected can realize voice coil motor and adopt the mode being arranged into array when producing, realize automated production, can in the end by c1, c2, c3, c4, product be separated from array after completing the assembling of all parts.
Should be understood that, the above-mentioned description for specific embodiment is comparatively detailed, and therefore can not think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (8)
1. one kind can the voice coil motor of accurate centering, it is characterized in that, comprise: the shell up and down with loophole be made up of base (7) and upper casing (1), lens mount (5) is in the enclosure set, be sleeved on the coil (8) on the outer wall of lens mount (5) side, be arranged on magnet (4) corresponding with coil position on upper casing (1) inwall, the lower plane spring (6) of connection lens seat (5) lower surface and base (7), it is characterized in that, described lens mount (5) lower surface is provided with the equidistant positioning convex apart from its center, described base (7) is provided with the equidistant detent apart from its center, described lower plane spring (6) is respectively equipped with and described positioning convex, the endoporus that detent position is corresponding, exit orifice, the centre distance of described interior pitch-row lower plane spring is equal, the centre distance of described outer pitch-row lower plane spring (6) is equal.
2. voice coil motor as claimed in claim 1, is characterized in that, described lower plane spring (6) is by being fixedly connected with base (7) Intermediate gasket (2); Describedly Intermediate gasket (2) is comprised to the many support columns (21) being distributed in lens mount periphery, connect each support column (21) upper end in turn and form the intercell connector of framework (22), the framework (22) of described support column (21) upper end is inconsistent with upper casing (1) lower surface, the lower end of described support column (21) and lower plane spring (6) and base (7) inconsistent, and be provided with can through the bottom protrusion of described exit orifice and detent in its lower end.
3. voice coil motor as claimed in claim 2, it is characterized in that, described voice coil motor also comprises the upper plane spring (3) connected Intermediate gasket (2) and lens mount (5) upper surface, described upper plane spring (3) with the coupling part of Intermediate gasket (2) is provided with multiple apart from the equidistant through hole in its center, described being provided with Intermediate gasket can through the top bump of described through hole.
4. voice coil motor as claimed in claim 3, it is characterized in that, described upper plane spring (3) comprising: the inner ring (31) be connected with lens mount (5) upper surface, be connected with upper casing (1) lower surface and the outer shroud (32) concentric with inner ring (31), between described inner and outer rings by inner and outer rings institute planar bend back and forth elater connection.
5. voice coil motor as claimed in claim 4, it is characterized in that, the upper surface of described lens mount (5) is provided with multiple slot being positioned at coil evenly and at intervals, and the lower surface of described upper casing (1) is provided with the inserted block that can insert in slot, and the gap between described inserted block and slot forms U-lag.
6. the voice coil motor as described in claim 1 to 5 any one claim, is characterized in that, is respectively equipped with two openings bottom two opposite flanks of described upper casing (1).
7. voice coil motor as claimed in claim 6, it is characterized in that, described lower plane spring (6) comprising: two the interior intercell connectors (61) be oppositely arranged respectively, be arranged on interior intercell connector (61) outside and the outer intercell connector (62) relative with two that interior intercell connector staggers, the two ends of described outer intercell connector (62) are connected respectively by the two ends of the elater bent back and forth with interior intercell connector (61), and one end of described two outer intercell connectors (62) is provided with two pins (63) with lower plane spring place plane orthogonal.
8. the voice coil motor as described in claim 1 to 5 any one claim, it is characterized in that, described coil (8) is for being wrapped in the focusing coil on lens mount (5) outer wall, and the outer wall of described lens mount (5) is provided with two the hanging wire blocks can fixing focusing coil two the end of a thread respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511006323.2A CN105429419A (en) | 2015-12-29 | 2015-12-29 | Voice coil motor capable of being centered accurately |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511006323.2A CN105429419A (en) | 2015-12-29 | 2015-12-29 | Voice coil motor capable of being centered accurately |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105429419A true CN105429419A (en) | 2016-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511006323.2A Pending CN105429419A (en) | 2015-12-29 | 2015-12-29 | Voice coil motor capable of being centered accurately |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105429419A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105892000A (en) * | 2016-04-13 | 2016-08-24 | 厦门新鸿洲精密科技有限公司 | Dustproof structure of voice coil motor |
| CN105915019A (en) * | 2016-04-29 | 2016-08-31 | 东莞市东勤电子有限公司 | Voice coil motor and assembly technology thereof |
| CN108356513A (en) * | 2018-04-03 | 2018-08-03 | 苏州聚力电机有限公司 | A kind of vibration discharge device of voice coil motor shrapnel merging machine |
| CN110985574A (en) * | 2019-12-25 | 2020-04-10 | 新思考电机有限公司 | Planar spring, camera lens driving device, camera and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TW201042890A (en) * | 2009-05-27 | 2010-12-01 | Hon Hai Prec Ind Co Ltd | Voice coil motor |
| CN102810968A (en) * | 2011-05-30 | 2012-12-05 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor actuator and picture taking device |
| CN103354397A (en) * | 2013-06-26 | 2013-10-16 | 宜兴市贵鑫磁电高科技有限公司 | Voice coil motor with dustproof structure |
| CN104865677A (en) * | 2015-06-03 | 2015-08-26 | 南昌欧菲光电技术有限公司 | Voice coil motor, elastic piece thereof, and camera module group employing voice coil motor |
| US20150355524A1 (en) * | 2011-11-16 | 2015-12-10 | Lg Innotek Co., Ltd. | Voice coil motor |
| CN205453450U (en) * | 2015-12-29 | 2016-08-10 | 深圳市美意达科技有限公司 | Voice coil motor that can accurate centering |
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2015
- 2015-12-29 CN CN201511006323.2A patent/CN105429419A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201042890A (en) * | 2009-05-27 | 2010-12-01 | Hon Hai Prec Ind Co Ltd | Voice coil motor |
| CN102810968A (en) * | 2011-05-30 | 2012-12-05 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor actuator and picture taking device |
| US20150355524A1 (en) * | 2011-11-16 | 2015-12-10 | Lg Innotek Co., Ltd. | Voice coil motor |
| CN103354397A (en) * | 2013-06-26 | 2013-10-16 | 宜兴市贵鑫磁电高科技有限公司 | Voice coil motor with dustproof structure |
| CN104865677A (en) * | 2015-06-03 | 2015-08-26 | 南昌欧菲光电技术有限公司 | Voice coil motor, elastic piece thereof, and camera module group employing voice coil motor |
| CN205453450U (en) * | 2015-12-29 | 2016-08-10 | 深圳市美意达科技有限公司 | Voice coil motor that can accurate centering |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105892000A (en) * | 2016-04-13 | 2016-08-24 | 厦门新鸿洲精密科技有限公司 | Dustproof structure of voice coil motor |
| CN105915019A (en) * | 2016-04-29 | 2016-08-31 | 东莞市东勤电子有限公司 | Voice coil motor and assembly technology thereof |
| CN108356513A (en) * | 2018-04-03 | 2018-08-03 | 苏州聚力电机有限公司 | A kind of vibration discharge device of voice coil motor shrapnel merging machine |
| CN110985574A (en) * | 2019-12-25 | 2020-04-10 | 新思考电机有限公司 | Planar spring, camera lens driving device, camera and electronic equipment |
| CN110985574B (en) * | 2019-12-25 | 2024-03-05 | 新思考电机有限公司 | Plane spring, camera lens driving device, camera and electronic equipment |
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Application publication date: 20160323 |