CN205753923U - Auto-focusing voice coil motor - Google Patents
Auto-focusing voice coil motor Download PDFInfo
- Publication number
- CN205753923U CN205753923U CN201620461054.2U CN201620461054U CN205753923U CN 205753923 U CN205753923 U CN 205753923U CN 201620461054 U CN201620461054 U CN 201620461054U CN 205753923 U CN205753923 U CN 205753923U
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- China
- Prior art keywords
- magnetitum
- objective carrier
- coil
- optical axis
- auto
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Abstract
The utility model discloses a kind of auto-focusing voice coil motor, including the housing being made up of lower cover and iron yoke, it is arranged on the objective carrier of band camera lens in housing, it is arranged on objective carrier lateral wall at least one Magnetitum for limiting the relative position between housing with objective carrier, it is arranged on housing interior side-wall at least one coil relative with described Magnetitum, described coil and Magnetitum interact and produce moment clockwise or counterclockwise and promote objective carrier to enclose to rotate on optical axis, the lateral wall of described objective carrier and the most fixed guidance set on the medial wall of housing, described guidance set is when objective carrier rotates, limit the displacement in the plane being perpendicular to optical axis of the described objective carrier, described objective carrier is made to move back and forth along this fixed optical axis while rotating around a fixed optical axis.This utility model can realize precisely focusing, and is not disturbed by the factor such as technique, external forces, and assembly is simplified further, it is achieved that miniature autofocus motor.
Description
Technical field
This utility model relates to auto-focusing voice coil motor, and particularly relating to that a kind of optical axis do not rocks can exact focus automatic
Focusing motor.
Background technology
Smart mobile phone photographic head voice coil motor is the most universal at present.Voice coil motor is called for short (VCM), and it includes fixed part
Dividing and motion parts, connected by shell fragment between standing part and motion parts, shell fragment can be stretched along optical axis like one
The spring of contracting, the outer perimeter section of shell fragment fixes with standing part, and inner round portion is fixed with motion parts, leads between outer ring and inner ring
Crossing elater to connect so that motion parts can move back and forth along optical axis, this is perfect condition, i.e. all directions institute of elater
Be subject to makes a concerted effort along optical axis, but in actual production process, existing processing technology can not ensure each side of elater
Uniform force upwards, especially elater are the softest, and the stress in all directions is more hard to keep uniformly, and camera lens more is susceptible to.
And drive that motion parts moves is by the active force between coil and Magnetitum, and the active force in all directions is the most relatively difficult to ensure
Hold consistent, cause camera lens to tilt.
In addition, in actual use, the posture of the adept machine of people is different, either with or without rocking, all can make elater
Being affected by motion parts Gravity changer and the affecting of external forces, the therefore suffered external world makes a concerted effort the most also can not be completely
Along optical axis, these all can cause voice coil motor position inaccuracy and camera lens of camera lens during doing auto-focusing to occur
Tilting, the effect that causes taking pictures is not very good.
Summary of the invention
This utility model, in order to solve technical problem present in above-mentioned prior art, proposes a kind of auto-focusing voice coil loudspeaker voice coil horse
Reach, including the housing being made up of lower cover and iron yoke, be arranged on the objective carrier of band camera lens in housing, be arranged on outside objective carrier
For limiting at least one Magnetitum of the relative position between housing with objective carrier on wall, it is arranged on housing interior side-wall with described
At least one coil that Magnetitum is relative, described coil and Magnetitum interact and produce moment promotion objective carrier clockwise or counterclockwise
Enclose and rotate on optical axis, the lateral wall of described objective carrier and the most fixed guidance set on the medial wall of housing, described guidance set
When objective carrier rotates, limit the displacement in the plane being perpendicular to optical axis of the described objective carrier, make described objective carrier fix around one
Optical axis moves back and forth along this fixed optical axis while rotating.
In one embodiment, described coil and Magnetitum are equipped with one, and described coil and Magnetitum are parallel to each other and face,
The described coil magnetic line of force relative two part suffered by parallel with optical axis is in opposite direction.Described Magnetitum is towards the one of coil
Face is that magnetic are noted at plane the two poles of the earth, or described Magnetitum is made up of two blocks of first, second independent Magnetitums, first, second Magnetitum towards
The polarity of the one side of coil is different.
In other embodiments, when described coil is provided with two or more, the number of the Magnetitum corresponding with described coil
Measure equal with number of coils, or 2 times that the quantity of the Magnetitum corresponding with described coil is number of coils, or with described coil
Corresponding Magnetitum is a monoblock Magnetitum, and described monoblock Magnetitum is that magnetic are noted at the two poles of the earth, many places towards the one side of coil.
The concrete structure installing driving assembly is to be completed by lower cover and objective carrier, and described lower cover includes the end of band through hole
Plate be arranged on base plate at least 2 mounting posts vertical with described base plate, between each two mounting post formed be used for fixing line
The bayonet socket of circle, position corresponding with described bayonet socket on the sidewall of described objective carrier is provided with the mounting groove for fixing Magnetitum.
Described guidance set includes: be arranged on the multi-turn of inner surface of described mounting post first with described optical axis as the center of circle
Thread, is arranged on the sidewall of described objective carrier multi-turn the second thread threadeded with described first thread, described first spiral shell
It is provided with ball in gap between tooth and the second thread, and/or the contact portion of described first thread and the second thread is minute surface
Contact.
Autofocus motor of the present utility model can be open loop motor can also be closed loop motor, when realizing closed loop motor
Time, described autofocus motor also include being arranged on described lower cap upper surface at least one for sensing the Hall of Magnetitum position
Induction apparatus, for receiving the control circuit that coil current size is controlled by the signal of described hall sensor.
Optical axis described in the technical program coincides with the optical axis of imageing sensor.
This utility model is by guidance set and drives assembly to make objective carrier rotate around same axis all the time, and
Make it can move along optical axis when rotating, decrease position inaccuracy in existing voice coil motor motor process and
Optical axis deflection in motor process, it is possible to significantly improve the effect of taking pictures of photographic head module.Owing to this utility model uses loose
Threaded objective carrier and housing, therefore, have further been omitted the parts such as shell fragment, the processing technology making voice coil motor is simpler
Single.
Accompanying drawing explanation
Fig. 1 is the explosive view of this utility model first embodiment；
Fig. 2 is the part assembling figure after the deformation of this utility model first embodiment；
Fig. 3 is the explosive view of this utility model the second embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawings principle of the present utility model and structure are described in detail.
As it is shown in figure 1, the auto-focusing voice coil motor that this utility model first embodiment provides, including lower cover 2, iron magnetic
Yoke 1, the objective carrier 3 of band camera lens, guidance set and driving assembly.
Objective carrier 3 is arranged in housing, and the lateral wall of objective carrier is provided with at least one Magnetitum 4, by Magnetitum 4 and iron
The effect attracted each other of yoke, can limit the relative position between housing with objective carrier, corresponding, has at least one line
Circle 5 is arranged on housing interior side-wall relative with Magnetitum 4, and coil and Magnetitum can interact and produce moment clockwise or counterclockwise
Promoting objective carrier to enclose to rotate on optical axis, guidance set is fixed on the lateral wall of objective carrier and the medial wall of housing, works as objective carrier
During rotation, guidance set can limit the objective carrier displacement in the plane being perpendicular to optical axis, makes described objective carrier fix around one
Optical axis moves back and forth along this fixed optical axis while rotating, and this fixing optical axis is that the optical axis with imageing sensor is
Overlap, it is thus achieved that the accurate focus function of camera lens.
In the first embodiment, drive assembly to use the Magnetitum 4 that is parallel to each other and faces for a pair and coil 5, coil 5 with
The parallel magnetic line of force suffered by relative two part of optical axis is in opposite direction.In order to install driving assembly, lower cover 2 includes that band is logical
The base plate 21 in hole and be arranged on four mounting posts 22 vertical with base plate 21 on 21 4 angles of base plate, shape between two mounting posts 22
Becoming to can be used for the bayonet socket 23 of fixed coil 5, position relative with bayonet socket 23 on the sidewall of objective carrier 3 also is provided with for fixing Magnetitum
The mounting groove 31 of 4.Mounted Magnetitum 4 and coil 5 are parallel to each other and face, relative two that coil 5 is parallel with optical axis
The magnetic line of force suffered by part is in opposite direction, and Magnetitum 4 can be a monoblock Magnetitum, and this Magnetitum 4 is plane towards the one side of coil 5
The two poles of the earth note magnetic, the left side of Magnetitum 4 is N pole and right side is S pole, it is assumed that the sense of current in present coil 5 be clockwise direction, line
Circle 5 upper and lower two parts vertical with optical axis are owing to same current direction is by two kinds of contrary magnetic line of force effects, and active force is by phase
Offsetting mutually, coil 5 left and right two parts parallel with optical axis will be subject to the effect counterclockwise around optical axis according to left hand rule
Power, according to active force and counteracting force, Magnetitum 4 left and right two parts parallel with optical axis will by active force clockwise, and
This active force can overcome the attraction frictional force between Magnetitum and iron yoke, promotes objective carrier to rotate clockwise.
In order to make objective carrier 3 in rotation process, it is possible to achieve focusing, the inner surface of mounting post 22 is of periphery
Point, its inner surface is provided with the multi-turn the first thread with optical axis as the center of circle, and the sidewall of objective carrier 3 is provided with the first thread screw thread even
Multi-turn the second thread connect, is so eliminated shell fragment, directly objective carrier 3 and lower cover 2 is connected by the first thread and the second thread
Pick up, between the first thread and the second thread, there is bigger gap, to guarantee that objective carrier 3 can be with ease rotation, then
In gap between the first thread and the second thread place ball 6, make objective carrier can precisely centering, and reduce objective carrier transport
Frictional force required during Dong, so that only need the least power that objective carrier just can be promoted to move, and ensures that objective carrier is not
Deviation optical axis can be extruded in rotation process.During objective carrier 3 rotates, by ball, the first thread, the second thread
Cooperation, objective carrier 3 will move up and down along optical axis, thus realizes precisely focusing.It is of course also possible between employing thread
Minute surface coordinates, and saves ball, or the mode that ball coordinates with minute surface is combined, also can meet the frictional force between cooperation suitable
When scope, same realize accurately to the smooth motion neutralizing objective carrier.
In the present embodiment, Magnet 4 is in addition to a monoblock Magnetitum, it is also possible to by two blocks of first, second independent Magnetitums
Composition, first, second Magnetitum is different towards the polarity of the one side of coil.For installing the mounting post of coil 5 except the 4 of diagram
Individual, arrange 2,3 etc. according to the quantity of coil to be fixed or Magnetitum and also can.Coil 5 is except being arranged on installation
Between post, it is also possible to be fixed in iron yoke, as long as carrying out the insulation of coil and iron yoke, or use other
Extra fixation kit fixes coil can also.
Except above structure forms the voice coil motor of open loop, can also set at the upper surface of lower cover 2 in this embodiment
Put at least one for the hall sensor (not shown) sensing Magnetitum position, and for receiving the letter of hall sensor
Number control circuit being controlled coil current size, so that voice coil motor forms the closed loop voice coil loudspeaker voice coil that can carry out accuracy controlling
Motor.
As it is shown on figure 3, the autofocus motor that the second embodiment of the present utility model proposes, with the structure of first embodiment
All similar with principle, simply drive used Magnetitum and the quantity distinct (ball not shown in figure) of coil in assembly,
The driving assembly of the second embodiment contains two coils 5, and a monoblock Magnetitum 4 corresponding with two coils 5, this block Magnetitum 4
Being that magnetic are noted at the two poles of the earth, many places towards the one side of coil, alternately showwing loving care for magnetic in one side the two poles of the earth that i.e. Magnetitum 4 and coil plane face, has two
Part is N pole, and also two parts are S pole.It is, of course, also possible to select the Magnet of two blocks of plane the two poles of the earth note magnetic, or select 4 pieces solely
Vertical little Magnetitum is one group two-by-two and carrys out a corresponding coil, it is only necessary to meet relative two the part institute that coil is parallel with optical axis
The magnetic line of force this condition in opposite direction being subject to.
In the above two embodiments, the shape of shell is not particularly limited by this utility model, except the four directions of diagram
The bodily form, it is also possible to for hollow cylinder.Particular location for mounting post and bayonet socket is also not particularly limited, because driving assembly
The moment clockwise or counterclockwise being around optical axis produced, is therefore provided on the four edges of base plate being also provided in base plate
Four angles on objective carrier all can be promoted to rotate.For the quantity of coil and Magnetitum except two two couples that embodiment is enumerated
Coil Magnetitum group, it is also possible to according to the size of concrete voice coil motor arrange 3 to and more than.And between multipair Magnetitum coil groups
Interval without going deliberately to calculate, when coil is two or more, the direction of winding of coil can identical can also be entirely different,
Have only to the direction of winding according to coil and change the sense of current, it is, of course, also possible to be passed through the fixing sense of current, go design
The direction of winding of good coil, these simply deformation are all based on routine techniques means of the present utility model, belong to this practicality
In novel protection domain.
Additionally, objective carrier of the present utility model is in addition to threadeding with the lower cover of shell, it would however also be possible to employ bullet
Sheet connection lens seat and housing, such as, by lower end face and the upper surface of objective carrier of shell fragment connection yoke, meanwhile,
One circle the first thread is set on the inner surface of mounting post 22, the sidewall of objective carrier 3 arranges circle second thread, the first thread
And second the gap between thread define an arc track, this track can be placed ball, it is also possible to be thread it
Between mutual minute surface coordinate, use the turn of the screw principle, it is possible to realize the focusing of objective carrier.
Embodiments above is only in order to illustrate structure of the present utility model, and those of ordinary skill in the art is at this
Can make various deformation and change under the design of utility model, these deformation and change are included in protection of the present utility model
Within the scope of.
Claims (8)
1. an auto-focusing voice coil motor, it is characterised in that including: the housing being made up of lower cover and iron yoke, is arranged on
The objective carrier of band camera lens in housing, is arranged on objective carrier lateral wall for limiting relative position between housing with objective carrier
At least one Magnetitum, is arranged on housing interior side-wall at least one coil relative with described Magnetitum, described coil and Magnetitum phase
Interaction produces moment clockwise or counterclockwise and promotes objective carrier to enclose and rotate on optical axis, the lateral wall of described objective carrier and housing
The most fixed guidance set on medial wall, described guidance set, when objective carrier rotates, limits described objective carrier and is being perpendicular to light
The displacement of the plane of axle, makes described objective carrier move back and forth along this fixed optical axis while rotating around a fixed optical axis.
2. auto-focusing voice coil motor as claimed in claim 1, it is characterised in that described coil and Magnetitum are equipped with,
Described coil and Magnetitum are parallel to each other and face, the magnetic force suffered by relative two part that described coil is parallel with optical axis
Line is in opposite direction.
3. auto-focusing voice coil motor as claimed in claim 2, it is characterised in that described Magnetitum is flat towards the one side of coil
Magnetic is noted at the two poles of the earth, face, or described Magnetitum is made up of two blocks of first, second independent Magnetitums, and first, second Magnetitum is towards coil
The polarity of one side is different.
4. auto-focusing voice coil motor as claimed in claim 1, it is characterised in that described coil is provided with two or more
Time, the quantity of the Magnetitum corresponding with described coil is equal with number of coils, or the quantity of the Magnetitum corresponding with described coil is
2 times of number of coils, or the Magnetitum corresponding with described coil be a monoblock Magnetitum, and described monoblock Magnetitum is towards the one of coil
Face is that magnetic is noted at the two poles of the earth, many places.
5. the auto-focusing voice coil motor as described in claim 2 to 4 any one claim, it is characterised in that under described
Lid includes the base plate of band through hole and is arranged on base plate at least 2 mounting posts vertical with described base plate, each two mounting post it
Between formed for the bayonet socket of fixed coil, position corresponding with described bayonet socket on the sidewall of described objective carrier is provided with for fixing
The mounting groove of Magnetitum.
6. auto-focusing voice coil motor as claimed in claim 5, it is characterised in that described guidance set includes: be arranged on institute
State the multi-turn of inner surface of mounting post the first thread with described optical axis as the center of circle, be arranged on the sidewall of described objective carrier and institute
State the first thread threaded multi-turn the second thread, in the gap between described first thread and the second thread, be provided with ball；
And/or the contact portion of described first thread and the second thread is minute surface contact.
7. auto-focusing voice coil motor as claimed in claim 1, it is characterised in that described auto-focusing voice coil motor also includes
It is arranged at least one of described lower cap upper surface for sensing the hall sensor of Magnetitum position, for receiving described Hall sense
Answer the control circuit that coil current size is controlled by the signal of device.
8. auto-focusing voice coil motor as claimed in claim 1, it is characterised in that described optical axis and the optical axis of imageing sensor
Coincide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620461054.2U CN205753923U (en) | 2016-05-19 | 2016-05-19 | Auto-focusing voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620461054.2U CN205753923U (en) | 2016-05-19 | 2016-05-19 | Auto-focusing voice coil motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205753923U true CN205753923U (en) | 2016-11-30 |
Family
ID=57365238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620461054.2U Withdrawn - After Issue CN205753923U (en) | 2016-05-19 | 2016-05-19 | Auto-focusing voice coil motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205753923U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763017A (en) * | 2016-05-19 | 2016-07-13 | 深圳市世尊科技有限公司 | Automatic focusing voice coil motor |
| CN110177192A (en) * | 2019-05-31 | 2019-08-27 | 上海比路电子股份有限公司 | Anti-shaking structure, stabilization system and photographic device |
-
2016
- 2016-05-19 CN CN201620461054.2U patent/CN205753923U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763017A (en) * | 2016-05-19 | 2016-07-13 | 深圳市世尊科技有限公司 | Automatic focusing voice coil motor |
| CN105763017B (en) * | 2016-05-19 | 2018-05-25 | 深圳市世尊科技有限公司 | Auto-focusing voice coil motor |
| CN110177192A (en) * | 2019-05-31 | 2019-08-27 | 上海比路电子股份有限公司 | Anti-shaking structure, stabilization system and photographic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161130 Effective date of abandoning: 20180525 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20161130 Effective date of abandoning: 20180525 |