CN207744051U - A kind of focus control - Google Patents
A kind of focus control Download PDFInfo
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- CN207744051U CN207744051U CN201820104188.8U CN201820104188U CN207744051U CN 207744051 U CN207744051 U CN 207744051U CN 201820104188 U CN201820104188 U CN 201820104188U CN 207744051 U CN207744051 U CN 207744051U
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- focus control
- push plate
- control according
- guide rail
- fixed plate
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Abstract
The utility model is related to a kind of focus controls, including image sensor module；Guiding mechanism supports described image sensor component；Transmission mechanism drives the guiding mechanism linear movement；The guiding mechanism includes push plate and fixed plate, and the push plate is equipped with hollow guiding body, and the fixed plate is equipped with guide rail, and the hollow guiding body is cooperatively slidably connected with the guide rail.The focus control of the utility model has the advantages that focusing precision is high, stability is high.
Description
Technical field
The utility model is related to optical focusing technical field more particularly to a kind of focus controls.
Background technology
With the development of Digital Electronic Technique, market (such as monitors the consumer electronics product with imaging function
Camera, mobile phone camera, moving camera etc.) imaging requirements and use condition constantly improving.
Optical lens and associated component in camera product can vibrated, impact, collision, mistakes during transport
The influence of load can be under pressure in use, the distance change of temperature, the changes in environmental conditions such as impact and shooting causes
Influence, these influences often make optical lens and image sensor module generate relative displacement, cause under image quality
Drop.
Therefore, in order to ensure the image quality of product, when designing optical lens module, need use that can adjust optical frames
The focus control of head and imaging sensor distance.Current imaging product has manually or automatically focusing function, structure mostly
Often realized using modes such as worm and gear, feed screw nut, VCM motors.But opening up with optical lens application range
Exhibition and the raising of performance indicator, focus control in the prior art cannot meet high focusing precision, high reliability is wanted
It asks.
Utility model content
The purpose of this utility model is to provide the focus controls of a kind of high-precision, high stability.
To achieve the above object, the utility model provides a kind of focus control, including：
Image sensor module；
Guiding mechanism supports described image sensor component；
Transmission mechanism drives the guiding mechanism linear movement；
The guiding mechanism includes push plate and fixed plate, and the push plate is equipped with hollow guiding body, and the fixed plate is equipped with and leads
Rail, the hollow guiding body are cooperatively slidably connected with the guide rail.
One side according to the present utility model, the hollow guiding body are hollow cylinder, and the guide rail is round logical
Hole.
One side according to the present utility model, the hollow guiding body are spline, and the guide rail is splined hole.
One side according to the present utility model, the hollow guiding body are rectangular cylindrical body, and the guide rail is rectangular opening,
The rectangular cylindrical body is equipped with protrusion along horizontal direction, and the rectangular opening is equipped with groove in the horizontal direction.
One side according to the present utility model, the transmission mechanism include：
Transmission gear；
Gear shaft is connect with the transmission gear, and external peripheral surface is equipped with screw thread；
Nut is slidably connected with the gear shaft by the screw thread.
One side according to the present utility model, the nut, which is fixed, to be located in the hollow guiding body.
One side according to the present utility model, the gear shaft, the nut and the hollow guiding body are coaxially disposed.
One side according to the present utility model, the one end of the gear shaft far from the transmission gear are equipped with screw thread pressure
Lid.
One side according to the present utility model is equipped with spring between the push plate and the fixed plate.
One side according to the present utility model is equipped with ball bearing guide bushing between the transmission mechanism and the fixed plate.
One side according to the present utility model, the push plate be equipped with auxiliary guide way, the fixed plate be equipped with it is described
Assist the matched auxiliary guide rail of guide way.
One side according to the present utility model, the focus control further include：
Motor is connect with the transmission mechanism；
Identification mechanism, including inductor and inductor, for identification initial position of the guiding mechanism；
Shell is internally provided with accommodating space, described image sensor component, the guiding mechanism, the transmission mechanism, institute
It states motor and the identification mechanism is located in the accommodating space, optical lens is fixedly connected with outside the shell.
Focus control according to the present utility model, push plate are equipped with hollow guiding body, and fixed plate is equipped with guide rail, hollow guiding body
It is co-operatively slidably connected with guide rail, i.e. the shape of hollow guiding body and the shape of guide rail of the utility model are to cooperate
Ground, such as hollow guiding body are hollow cylinder, and guide rail is circular through hole, realize that the hole axle of hollow guiding body and guide rail coordinates,
Or hollow guiding body is spline, guide rail is splined hole, and spline is slidably matched with splined hole or hollow guiding body is rectangular column
Shape body, guide rail are rectangular opening, and rectangular cylindrical body is equipped with protrusion along horizontal direction, and rectangular opening is equipped with groove in the horizontal direction.It is logical
Cross hollow guiding body and the mutually matched sliding of rail shapes so that push plate during the motion, movement of the guide rail as push plate
Guide ensure that the tilt quantity of push plate during the motion is fixed the guide rail of plate and is limited, so as to ensure in push plate band
Motion video sensor module is carried out along the direction of central optical axis always during moving, and highly desirable ensure that focusing
Precision.
In addition, focus control according to the present utility model, guiding mechanism and transmission mechanism are detached, the tune of focus control
Pyrogene degree fully relies on guiding mechanism to ensure, avoids the shadow to focusing accuracy when existing focus control transmission mechanism moves
It rings, i.e., in entire push plate in moving process, tilt quantity only can coordinate precision between by the push plate and fixed plate of guiding mechanism
Influence, will not driven mechanism dimensional tolerance influence, can better ensure that the focusing accuracy of focus control.
Focus control according to the present utility model, gear shaft, nut, hollow guiding body central axial and camera lens center
Optical axis coincidence is arranged, and can so ensure, the driving force that transmission mechanism provides acts on push plate along the direction of central optical axis
Center, in other words, when being moved along central optical axis direction, the driving force that transmission mechanism provides not will produce point for push plate
Power, that is to say, that push plate will not be influenced in moving process by eccentric thrust, advantageously ensure that focusing precision and focused
The stability of journey.
In addition, spring is arranged between push plate and fixed plate, it can preferably ensure the resistance to shock of focus control and right
The stability of burnt process.In addition, push plate is additionally provided with auxiliary guide way other than being equipped with hollow guiding body, in push plate moving process
In, push plate is not only limited around axial-rotation, while guide way and hollow guiding body being assisted to constitute a plane of motion, to
So that push plate move in the axial direction it is more stable, i.e., so that focusing it is more stable.
The tooth pitch of gear shaft and nut according to the present utility model can be configured according to the demand of focusing accuracy, work as horse
Often walked up to gear rotational angle, one to one shell type gear arrangement it is constant when, pass through change transmission gear and nut tooth pitch, thus it is possible to vary
When stepper motor often makes a move, the distance of push plate movement, you can to meet the optical lens of varying sensitivity to different focusing essence
The demand of degree so that the focus control of the utility model can be applied to a plurality of types of optical lens, applied widely.
Description of the drawings
Fig. 1 is to schematically show optical focusing device assembling figure according to the present utility model；
Fig. 2 is the exploded view for schematically showing optical focusing device according to the present utility model.
Specific implementation mode
It, below will be to implementing in order to illustrate more clearly of the utility model embodiment or technical solution in the prior art
Attached drawing needed in mode is briefly described.It should be evident that the accompanying drawings in the following description is only that this practicality is new
Some embodiments of type for those of ordinary skills without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
When the embodiment for the utility model is described, term " longitudinal direction ", " transverse direction ", "upper", "lower",
"front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", the orientation or positional relationship expressed by "outside" are
Based on orientation or positional relationship shown in relevant drawings, it is merely for convenience of describing the present invention and simplifying the description, without
It is instruction or implies that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore on
Term is stated to should not be understood as limiting the present invention.
The utility model is described in detail with reference to the accompanying drawings and detailed description, embodiment cannot herein one
One repeats, but therefore the embodiment of the utility model is not defined in following implementation.
Fig. 1 is the assembling figure for schematically showing focus control according to the present utility model.Fig. 2 is schematically shown according to this
The exploded view of the focus control of utility model.Shown in reference picture 1, Fig. 2, focus control according to the present utility model includes that image passes
Sensor component 1, guiding mechanism 2, transmission mechanism 3, shell 9.In the present embodiment, shell 9 has accommodating space, image sensing
Device assembly 1, guiding mechanism 2, transmission mechanism 3 are arranged in shell 9, and wherein sensor module 1 includes the pcb board of routine, passes
The various electronic components such as sensor, image sensor module 1 are fixedly supported upon on guiding mechanism 2, and driving mechanism 3 can drive Guiding machine
Structure 2 does linear reciprocal movement in an axial direction, and then image sensor module 1 is driven to be axially moveable, to realize that adjustment image passes
The purpose of distance between sensor component 1 and camera lens 10 realizes focusing purpose.
As shown in Figure 1 and Figure 2, the guiding mechanism 2 of the utility model includes push plate 21 and fixed plate 22.Wherein fixed plate 22
It is fixed in the accommodating space of shell 10, push plate 21 is supported in fixed plate 22, and push plate 21 is co-operatively slided with fixed plate 22
Dynamic connection.
In the present embodiment, push plate 21 is equipped with hollow guiding body 211, and fixed plate 22 is equipped with guide rail 221, the sky of push plate 21
Heart guide way 211 and the shape of the guide rail 221 of fixed plate 22 are co-operatively arranged, and hollow guiding body 211 is sliding in guide rail 221
It is dynamic.Specifically, in the present embodiment, hollow guiding body 211 is hollow cylinder shape (not shown), and guide rail 221 is that setting exists
Size, the shape of through-hole in fixed plate 22, hollow cylinder and through-hole cooperate.Through-hole is moved as hollow cylinder
It is oriented to limitation so that when hollow cylinder drives push plate 21 to move, ensure axial movement of the push plate 21 along through-hole, so as to
Effectively ensure focusing precision, can ensure push plate 21 drive image sensor module 1 moving process in always along
It is axial to carry out.
In another embodiment, hollow guiding body 211 is the spline (not shown) being arranged in push plate 1, guide rail 221
For the splined hole in fixed plate 22 is arranged, spline cooperates with spline hole shape, size.In the moving process of push plate 21
In, the guiding limitation that splined hole is moved as spline limits tilt quantity of the push plate 21 in moving process, advantageously ensures that tune
Pyrogene degree.It should be pointed out that the cooperation shape of the fit form and hollow cylinder and circular through hole of such spline and splined hole
The attainable focusing accuracy of formula institute is different, for example, the focusing accuracy that the fit form of spline and splined hole can reach
Higher, but it is also relatively high for the cooperation required precision of spline and splined hole.Hollow guiding body 211 is specific with guide rail 221
Fit form can be needed according to the focusing of the optical lens of varying sensitivity to be selected.In other words, new according to this practicality
The focus control of type, the difference that can be required for focusing accuracy according to different optical lens reasonably select hollow guiding body
211 with the specific fit form of guide rail 221 so that the focus control scope of application of the utility model is wider.
The third embodiment according to the present utility model, the hollow guiding body 211 in push plate 21 be rectangular cylindrical body (not
Diagram), guide rail 221 be rectangular through-hole, rectangular cylindrical body along level be equipped with protrusion, rectangular through-hole along horizontal direction correspondingly
Equipped with groove, raised rectangular cylindrical body is co-operatively slided with having reeded rectangular through-hole, has reeded square
Guiding limitation when shape through-hole is moved as raised rectangular cylindrical body, ensures focusing accuracy.Certainly, such hollow guiding
Body 211 is also different from the fit form of guide rail 212 and the attainable focusing accuracy of above two form, with specific reference to reality
It is selected.Additionally, it is appreciated that hollow guiding body 211 and the fit form of guide rail 221 are also not limited to above-mentioned arrangement
Mode.
As shown in Figure 1, in the present embodiment, the transmission mechanism 3 of the utility model includes transmission gear 31, gear shaft 32
With nut 33.Gear shaft 32 is connect with transmission gear 31, and the external peripheral surface of gear shaft 32 is equipped with screw thread, and gear shaft 32 passes through spiral shell
Mother 33, is connected through a screw thread with nut 33.The nut 33 of the utility model is fixed at the hollow guiding body 211 of push plate 21
In.In the present embodiment, the excircle of nut 33 be equipped with limit protrusion (not shown), hollow guiding body 211 it is interior
Surface is equipped with to be recessed (not shown) with the matched limit of limit protrusion, is matched by what limit protrusion and limit were recessed
Close, nut 33 is fixed in hollow guiding body 211, can so limit nut 33 around axial rotation motion.Hollow guiding body
211 are connect by nut 33 with transmission mechanism 3, realize the connection of guiding mechanism 2 and transmission mechanism 3.
Because nut 33 is set in by screw thread on gear shaft 32, and nut 33 is limited by hollow guiding body 211 again
Rotation, so, when transmission gear 31 with movable gear shaft 32 around axial rotation motion when, nut 33 can extend along gear shaft 32
Direction is moved, final to realize focusing purpose to drive hollow guiding body 211 to move in the axial direction.
In the present embodiment, gear shaft 32, nut 33, hollow guiding body 211 are coaxially disposed, that is, gear shaft 32, spiral shell
Female 33, the central shaft of hollow guiding body 211 overlaps setting with the central optical axis of camera lens 10, can so ensure, transmission mechanism 3 carries
The driving force of confession acts on the center of push plate 21 along the direction of central optical axis, and in other words, push plate 21 is along center light
Axis direction move when, transmission mechanism 3 provide driving force not will produce component, that is to say, that push plate 21 in moving process not
It can be influenced by eccentric thrust, advantageously ensure that the stability of focusing precision and focus process.
In addition, being equipped with union (screwed)bonnet (UB in the one end (upper end of Fig. 1 middle gears axis 32) of gear shaft 32 far from transmission gear 31
4, nut 33 is set on the gear shaft 32 between union (screwed)bonnet (UB 4 and transmission gear 31, plays 33 shift position of limitation nut
Effect.
As shown in Figure 1 and Figure 2, spring 6, in the present embodiment, spring are additionally provided between push plate 21 and fixed plate 22
5 are arranged between push plate 21 and fixed plate 22 so that push plate 21 is in the state jacked up upwards always with nut 33.In this implementation
In mode, spring 5 is waveform spring, can preferably ensure the resistance to shock and focus process of product using waveform spring
Stability.Specifically, it can be required according to the antivibration in actual use, adjust the coefficient of elasticity of waveform spring so that product exists
Under specific vibratory impulse, focus control remains able to stable use, is unaffected.
In addition, focus control according to the present utility model, ball bearing guide bushing is provided between transmission mechanism 3 and fixed plate 22
6, for when transmission mechanism 3 works, reducing the frictional resistance between transmission gear 31 and fixed plate 22, be conducive to improve focusing
The lasting stability of device.
As shown in Figure 1 and Figure 2, focus control according to the present utility model is additionally provided with auxiliary guide way 212 in push plate 21, Gu
It is provided on fixed board 22 and auxiliary 212 matched auxiliary guide rail 222 of guide way.In the present embodiment, guide way 212 is assisted
For cylindrical shape, for auxiliary 212 riveted of guide way in push plate 21, auxiliary guide rail 222 is the through-hole being arranged in fixed plate 22.
In present embodiment, there are two the auxiliary settings of guide way 212, and two auxiliary guide ways 212 are arranged the two of hollow guiding body 211
Side, and be symmetrical arranged about hollow guiding body 211.In this way, the cooperation by assisting guide way 212 and auxiliary guide rail 22, energy
Enough positions for limiting push plate 21 well so that push plate 21, will not be around axial-rotation when moving in the axial direction.Meanwhile two is auxiliary
Help guide way 212 and hollow guiding body 211 to constitute a plane of motion so that push plate 21 move in the axial direction it is more steady
It is fixed.Certainly, the number of auxiliary guide way 212 is not limited to the above embodiment with setting form, can reach said effect its
His embodiment, is arranged with specific reference to actual requirement.
Further include motor 7 and identification mechanism 8 as shown in Fig. 2, focus control according to the present utility model, motor 7 and identification
Mechanism 8 is similarly disposed in the accommodating space of shell 9.In the present embodiment, motor 7 is stepper motor, and the setting of motor 7 is passing
The lower section of motivation structure 3 is engaged with the transmission gear 31 in transmission mechanism 3 by motor gear, provides driving force to transmission gear
31, the relevant parameter that gear-box changes motor gear can be specifically added as needed.The identification mechanism 8 of the utility model includes 81
With inductor 82, in the present embodiment, inductor 82 is motor PI, for identification the initial position of focus control.Inductor
81 be square column body, and 81 riveted of inductor is in push plate 21, for incuding to inductor 82.Specifically, work as needs
When image sensor module 1 is returned to initial position, after motor receives signal, the axially counter motion of push plate 21, until
When inductor 81 is had an effect with inductor 82, you can the initial position of automatic identification image sensor module 1, and stop transporting
It is dynamic.
According to the above embodiment, after the focus control of the utility model is completed, focusing implementation method is as follows：Step
Transmission mechanism 3 is transferred a driving force to by transmission gear 31 into motor 7, then, transmission gear 31 is with movable gear shaft 32 in
Heart optical axis is rotated, and since nut 33 is fixed in hollow guiding body 211, is limited around axial rotation by hollow guiding body 211
Turn, so relative to the position of gear shaft 32 axial variation can occur for nut 33.Since waveform spring 5 can be such that push plate 21 is in
The state jacked up vertically, and nut 33 and the 211 fixed connection of hollow guiding body, so push plate 21 can be with nut 33
Position it is mobile and move.To make the position of the image sensor module being fixed in push plate 21 1 be axially moveable, realize
Change the function of image sensor module 1 and 10 spacing of camera lens, i.e. focusing function.When needing to return to image sensor module 1
When initial position, after motor receives signal, the axially counter motion of push plate 21, until inductor 81 and inductor 82 occur
When effect, you can the initial position of automatic identification image sensor module 1, and stop motion.
Focus control according to the present utility model, push plate 21 and 22 shape of fixed plate of guiding mechanism 2 are co-operatively slided
221 shape of guide rail of dynamic connection, i.e. the hollow guiding body 211 of push plate 21 and fixed plate 22 is mutually matched to be slidably connected so that
During the motion, guide rail 221 is limited as the motion guide of push plate 21, ensure that push plate 21 during the motion for push plate 21
The guide rail 221 that tilt quantity is fixed plate 22 is limited, so as to ensure to drive image sensor module 1 to move in push plate 21
It is carried out always along the direction of central optical axis in the process, highly desirable ensure that the precision of focusing.
In addition, focus control according to the present utility model, guiding mechanism 2 and transmission mechanism 3 are detached, focus control
Focusing accuracy fully relies on guiding mechanism 2 to ensure, to focusing accuracy when avoiding existing focus control transmission mechanism movement
It influences, i.e., in entire push plate 21 in moving process, tilt quantity only can be by the push plate 21 of guiding mechanism 2 and matching for fixed plate 22
Close precision influence, will not driven mechanism 3 dimensional tolerance influence, can better ensure that focus control focusing essence
Degree.
The tooth pitch of gear shaft 32 according to the present utility model and nut 33 can be configured according to the demand of focusing accuracy,
When motor gear often walk rotational angle, one to one shell type gear arrangement it is constant when, by change transmission gear and nut 33 tooth pitch, can
When often being made a move with changing stepper motor, the distance of the movement of push plate 21, you can to meet the optical lens of varying sensitivity to not
With the demand of focusing accuracy so that the focus control of the utility model can be applied to a plurality of types of optical lens, be applicable in model
It encloses wide.
The above is only enumerating for the concrete scheme of the utility model, for the equipment and knot of wherein not detailed description
Structure, it should be understood that the existing common apparatus in this field and universal method is taken to be practiced.
The foregoing is merely a schemes of the utility model, are not intended to limit the utility model, for ability
For the technical staff in domain, various modifications and changes may be made to the present invention.It is all the spirit and principles of the utility model it
Interior, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (12)
1. a kind of focus control, including：
Image sensor module (1)；
Guiding mechanism (2), bearing described image sensor component (1)；
Transmission mechanism (3) drives the guiding mechanism (2) linear movement；
It is characterized in that,
The guiding mechanism (2) includes push plate (21) and fixed plate (22), and the push plate (21) is equipped with hollow guiding body (211),
The fixed plate (22) is equipped with guide rail (221), the hollow guiding body (211) and the guide rail (221) the cooperatively company of sliding
It connects.
2. focus control according to claim 1, which is characterized in that the hollow guiding body (211) is hollow cylinder,
The guide rail (221) is circular through hole.
3. focus control according to claim 1, which is characterized in that the hollow guiding body (211) is spline, described to lead
Rail (221) is splined hole.
4. focus control according to claim 1, which is characterized in that the hollow guiding body (211) is rectangular cylindrical body,
The guide rail (221) is rectangular opening, and the rectangular cylindrical body is equipped with protrusion along horizontal direction, and the rectangular opening is in the horizontal direction
Equipped with groove.
5. focus control according to claim 1, which is characterized in that the transmission mechanism (3) includes：
Transmission gear (31)；
Gear shaft (32) is connect with the transmission gear (31), and external peripheral surface is equipped with screw thread；
Nut (33) is slidably connected with the gear shaft (32) by the screw thread.
6. focus control according to claim 5, which is characterized in that the nut (33) is fixed to be located at the hollow guiding
In body (211).
7. focus control according to claim 6, which is characterized in that the gear shaft (32), the nut (33) and institute
State hollow guiding body (211) coaxial arrangement.
8. focus control according to claim 5, which is characterized in that the gear shaft (32) is far from the transmission gear
(31) one end is equipped with union (screwed)bonnet (UB (4).
9. focus control according to claim 1, which is characterized in that between the push plate (21) and the fixed plate (22)
Equipped with spring (5).
10. focus control according to claim 1, which is characterized in that the transmission mechanism (3) and the fixed plate (22)
Between be equipped with ball bearing guide bushing (6).
11. focus control according to claim 1, which is characterized in that the push plate (21) is equipped with auxiliary guide way
(212), the fixed plate (22) is equipped with and the matched auxiliary guide rail of the auxiliary guide way (212) (222).
12. focus control according to claim 1, which is characterized in that the focus control further includes：
Motor (7) is connect with the transmission mechanism (3)；
Identification mechanism (8), including inductor (81) and inductor (82), for identification initial position of the guiding mechanism (2)；
Shell (9) is internally provided with accommodating space, described image sensor component (1), the guiding mechanism (2), the driver
Structure (3), the motor (7) and the identification mechanism (8) are located in the accommodating space, and optical frames is fixedly connected with outside the shell
Head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820104188.8U CN207744051U (en) | 2018-01-22 | 2018-01-22 | A kind of focus control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820104188.8U CN207744051U (en) | 2018-01-22 | 2018-01-22 | A kind of focus control |
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| Publication Number | Publication Date |
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| CN207744051U true CN207744051U (en) | 2018-08-17 |
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ID=63123885
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| CN201820104188.8U Active CN207744051U (en) | 2018-01-22 | 2018-01-22 | A kind of focus control |
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| Country | Link |
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| CN (1) | CN207744051U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063896A (en) * | 2018-01-22 | 2018-05-22 | 舜宇光学(中山)有限公司 | A kind of focus control |
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2018
- 2018-01-22 CN CN201820104188.8U patent/CN207744051U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063896A (en) * | 2018-01-22 | 2018-05-22 | 舜宇光学(中山)有限公司 | A kind of focus control |
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