KR20200012421A - Actuator for camera with module combination - Google Patents

Abstract

According to the present invention, provided is an actuator for module combination type camera, which is an actuator for a camera in which n (n is a natural number of 2 or more) number of actuator modules are combined. Each actuator module comprises: a housing; a carrier provided in the housing and mounting a lens; and a driving unit linearly moving the carrier in the optical axis direction. In the n number of actuator modules, an upper actuator module positioned above based on the optical axis direction of adjacent two actuator modules is provided with a coupling portion on a lower part, and a lower actuator module positioned lower on the optical axis direction than the upper actuator module is provided with a fastening portion coupled with the coupling portion of the actuator module on an upper part. The coupling portion and the fastening portion have a clearance space for optical axis alignment, and are physically coupled to each other.

Description

ACTUATOR FOR CAMERA WITH MODULE COMBINATION}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator for a camera, and more particularly, to an actuator for a module coupled camera that improves driving precision of a zoom lens or the like.

In accordance with the development of hardware technology and the change of user environment, various and complex functions are integrated in the mobile terminal (mobile terminal) in addition to the basic functions for communication.

Typical examples are camera modules that implement functions such as auto focus (AF) and image stabilization (OIS) .In recent years, voice recognition, fingerprint recognition, and iris recognition for authentication or security are implemented. Functions and the like are also mounted on portable terminals.

In addition, recently, a zoom lens has been attempted to be able to vary the size of a subject by variously adjusting a focal length through a zoom-in and a zoom-out function.

Light of the subject passing through the zoom lens is introduced into an image pickup device such as a charged-coupled device (CCD) and a complementary metal-oxide semiconductor (CMOS) like other lenses, and is then generated as image data through subsequent processing.

The zoom lens has a structure in which a plurality of lenses or lens groups are coaxially arranged in an optical axis direction, which is a direction in which light is generally introduced, and has a characteristic in that its length is extended in the optical axis direction than a general lens. The movement displacement moving relative to the optical axis direction for adjustment has a relatively large characteristic.

In a conventional actuator or the like, the zoom lens is fitted to a plurality of shafts linearly guiding the optical axis movement of the zoom lens (barrel or carrier equipped with the zoom lens), and the zoom lens moves along the shaft in that state. Is mainly applied.

However, in this structure, although the linear movement of the zoom lens can be induced to some extent, since it is implemented as a physical structure fitted with the shaft, unnecessary friction is generated during the linear movement, resulting in low power efficiency and precise control of the linear movement of the zoom lens. It is difficult, there is a problem that the overall driving performance is not high, such as unnecessary noise occurs.

Meanwhile, in order to implement functions such as zoom in or zoom out, a plurality of AF lenses and zoom lenses are provided in the actuator, and a structure using a combination of these mutual positional relationships is applied.

In this case, since the light of the subject passes through the plurality of lenses and enters the image pickup device, the correct optical axis alignment of each lens is very important. Problem occurs.

However, in the conventional apparatus, since the physical play between the shaft and the zoom lens cannot be fundamentally avoided, a tilt phenomenon of the zoom lens is likely to occur. Tilt phenomenon of the zoom lens can further degrade the precision of the image processing. In addition, due to such a structural problem, there is a problem in that it is not easy to align the zoom lenses correctly based on the optical axis direction.

On the other hand, in order to solve some of these problems, a method is provided in which a housing is provided with a rail extending in the optical axis direction and each zoom lens carrier moves on the rail.

In this case, as described above, since the moving distance of the zoom lens is relatively longer than that of the normal AF driving, when the plurality of zoom lenses are provided, the length of the rail becomes longer.

Therefore, even if there is a slight error in the design or manufacturing process such as the shape or linearity of the rail, the error accumulates, resulting in severe tilting of the zoom lens or the zoom lens carrier or significant influence on the optical axis alignment of each zoom lens. Get mad. In addition, the conventional optical axis alignment process itself is quite difficult because each zoom lens carrier is mounted on a rail in an incomplete component state and the optical axis alignment is performed in this state.

In addition, when such an error occurs, the housing or the actuator itself may be inferior, thereby destroying the entire housing or the entire actuator, and thus, the manufacturing cost and manufacturing efficiency may be considerably reduced.

SUMMARY OF THE INVENTION The present invention was devised to solve the above-mentioned problems in the above-mentioned background, and implements an actuator in a structure in which one or more zoom lens units or AF units are individually modularized and coupled to each other, thereby more effectively implementing optical axis alignment and An object of the present invention is to provide an actuator for a modular camera that can prevent the unit from tilting.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. In addition, the objects and advantages of the present invention can be realized by the configuration shown in the claims and combinations thereof.

The actuator for a module-coupled camera of the present invention for achieving the above object comprises a housing, a carrier provided inside the housing and a lens mounted thereon, and a driving unit for linearly moving the carrier in the optical axis direction, where n is 2 The actuator for the camera to which the four actuator modules are coupled, and the upper actuator module positioned at the upper side of the two actuator modules adjacent to each other in the n actuator modules based on the optical axis direction is provided with a coupling portion at the lower portion, and the upper actuator. The lower actuator module positioned below the optical axis direction than the module has a fastening portion coupled to the coupling portion of the upper actuator module, and the coupling portion and the coupling portion have a free space for optical axis alignment and are physically coupled to each other. It is configured to.

In addition, at least one of the upper and lower actuator module of the present invention is preferably provided with an inlet hole for introducing the adhesive into the free space after the alignment of the optical axis of the upper and lower actuator module is completed.

Here, one of the coupling part or the fastening part of the present invention may be configured to have a convex shape, and the other may be configured to have a concave shape corresponding to the convex shape.

Preferably, the present invention is provided on the top of the highest actuator module located at the top of the n-axis actuator module based on the optical axis direction, and further comprises an optical system module for reflecting the light of the subject incident from the outside in the optical axis direction Can be.

Herein, the optical module of the present invention has a second coupling part formed at a lower portion thereof, and the uppermost actuator has a second coupling part coupled to a second coupling part of the optical system module formed at an upper portion thereof, and in this case, The second fastening portion may be configured to have a second free space for optical axis alignment and to be physically coupled to each other.

In addition, one or more of the optical system module or the top actuator module of the present invention may be provided with a second inlet hole for introducing the adhesive into the second free space after the optical axis alignment of the optical system module and the top actuator module is completed.

Furthermore, the driving unit of the present invention may include a magnet provided on the carrier and a coil facing the magnet and generating a driving force on the magnet, in which case the n actuator modules of the present invention may be disposed between the carrier and the housing. Ball and provided in, and may generate a attraction to the magnet and may further include a yoke provided in the housing.

Preferably, the driving unit of the upper actuator module of the present invention is provided on one of the left or right side of the upper actuator module, in which case the driving unit of the lower actuator module is opposite to the direction in which the driving unit of the upper actuator module is provided It may be configured to be provided on the side.

In addition, the yoke of the present invention is preferably configured such that the size of the upper and lower parts differentially based on the optical axis direction.

Furthermore, at least one of the n actuator modules of the present invention may move in a direction perpendicular to the optical axis with respect to the carrier and include an OIS carrier having a second magnet, a second ball positioned between the OIS carrier and the carrier, And a second coil facing the second magnet and generating a driving force, and a second yoke for generating an attraction force in the second magnet.

According to a preferred embodiment of the present invention, even if one or more lens carriers move a relatively long distance relative to the optical axis direction, the linear movement of the lens carrier can be continuously maintained, thereby further improving the precision of linear control and zoom driving. Can be improved.

In addition, the present invention is implemented in a physical structure in which each of the lens carriers is individually modularized and they are coupled to each other up and down based on the optical axis direction can increase the process efficiency of assembling and manufacturing the entire actuator, as well as errors or failures In the event of an error, only the corresponding module can be replaced selectively, which enables efficient response to an error.

Furthermore, according to another embodiment of the present invention, the optical axis alignment operation is not carried out for the components but instead for the individual individual modules, so that the optical axis alignment operation itself can be more easily implemented, and errors in the optical axis alignment or each lens The possibility of the tilt of can be significantly reduced, further improving the driving precision of the actuator.

The following drawings, which are attached to this specification, illustrate exemplary embodiments of the present invention, and together with the detailed description of the present invention, serve to more effectively understand the technical spirit of the present invention. It should not be construed as limited to matters.
1 is a view showing the overall configuration of the actuator according to the present invention,
2 is a view showing the overall configuration for each actuator module according to an embodiment of the present invention,
3 is a view showing a detailed configuration of an actuator module according to an embodiment of the present invention,
4 is a view showing a structure or a relationship in which an upper actuator module and a lower actuator module of the present invention are coupled;
5 is a view showing a structure or a relationship between the optical system module and the top actuator module of the present invention;
6 is a view showing the configuration of the back and the yoke of the actuator according to an embodiment of the present invention,
7 is a view showing a detailed configuration of the actuator module is implemented OIS according to an embodiment of the present invention,
8 is a view showing a driving unit of each actuator module according to an embodiment of the present invention,
9 is a view showing a detailed configuration of an actuator module according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the specification and the configuration shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

1 is a view showing the overall configuration of an actuator for a module-coupled camera (hereinafter referred to as 'actuator') 1000 according to an embodiment of the present invention, Figure 2 is an actuator constituting the actuator 1000 The overall configuration of the modules 100, 200, 300 and the optical system module 400 is illustrated.

 As shown in FIG. 1, the actuator 1000 of the present invention includes n (two or more natural numbers) actuator modules 100, 200, and 300 which are completed modules in which independent driving is performed by components provided therein. And the case 500 may be configured.

The actuator 1000 of the present invention may be composed of only a plurality of actuator modules 100, 200, 300 for linearly moving a lens or carrier (mounted lens) provided therein in the optical axis direction (Z-axis direction). Therefore, the optical system module 400 for changing or refracting the light of the subject in the direction of the n actuator modules 100, 200, and 300 may be implemented.

When the optical system module 400 is provided together, the light of the subject is introduced into the actuator 1000 of the present invention through the opening 510 formed in the case 500 through the Z1 path, and flows into the interior of the actuator 1000. The light is changed (refractive to reflective, etc.) by the optical system module 400 of the present invention and is introduced into an image pickup device (not shown), such as a CCD, through other actuator modules 100, 200, and 300.

The optical module 400 for changing the path of light includes an optical system 401 which may be made of a selected one or a combination of a mirror or a prism. The optical system 401 may be implemented by various members capable of changing the light flowing from the outside in the direction of the optical axis. However, the optical system 401 may be implemented with a glass material to improve optical performance.

Since the actuator 1000 of the present invention including the optical system module 400 is configured to refract the path of light to allow light to flow therein, the lens itself may be installed in the longitudinal direction without installing in the thickness direction of the portable terminal. Since the thickness is not increased, the portable terminal can be optimized for miniaturization or slimming.

The optical system 401 of the optical system module 400 is installed in the direction of the opening 510 of the case 500 in which light is introduced into the actuator 1000, that is, the direction of the Y-axis, based on the example illustrated in FIG. 1.

The optical system module 400 supports the optical system 401 through a method of applying a magnetic force by a coil to the optical system 401 or a magnet provided in an object on which the optical system 401 is mounted while physically supporting the optical system 401. Rotate it.

When the optical system 401 is moved or rotated clockwise or counterclockwise with respect to the YZ plane, the light of the subject reflected (refractive) through the optical system 401 is moved in the + Y direction or the -Y direction so that the image pickup device Alternatively, since the light is incident on the lens, the Y-axis direction correction for the hand shake may be implemented by driving such a mechanism.

In order to increase the efficiency of explanation and understanding, the module for changing the path of light is hereinafter referred to as the optical module 400, and has a function of moving a lens provided therein or a carrier on which the lens is mounted in the optical axis direction (Z-axis direction). This implemented module is referred to as actuator module 100, 200, 300.

In addition, although three actuator modules 100, 200, and 300 are shown in the drawing, this is only one example. Of course, a larger number of actuator modules may be provided according to embodiments. Of course, it can also be implemented as a module.

On the other hand, the typical configuration for moving the lens or lens-mounted carrier in the optical axis direction is AF and ZOOM, in order to increase the efficiency of the description of the present invention, such as the module located on the top of the optical axis direction in the drawings, such as AF As the actuator module 100 for implementation, two modules located below it will be described as an example of the actuator modules 200 and 300 for implementing the zoom.

However, this is also just one example, and a module for implementing AF may not exist in the actuator 1000, and a module for implementing AF may be located at the center or the lowest of the plurality of actuator modules 100, 200, and 300. Actuator 1000 may be implemented in a positioned form or may be configured to implement AF in an integrated form with a zoom function.

The actuator module 100, 200, 300 may include one or more lenses, an optical member such as a lens group, a prism, a mirror, or the like (hereinafter referred to as a "lens"), and may be configured to implement an auto focus or zoom function. The lens provided in the apparatus is linearly moved in the Z-axis direction by control of an external control signal or the like.

In the following description, an axis corresponding to a vertical direction of the lens mounted on the actuator module 100, 200, 300, that is, a path through which light enters the lens is defined as an optical axis (Z axis), and is perpendicular to the optical axis (Z axis). Two axes on one plane are defined as X and Y axes.

As described above, in the case of an actuator for a conventional zoom function or the like, the actuator is fitted to a common shaft to move the plurality of carriers or move the plurality of carriers on a common rail provided in the housing or the like. Is implemented.

However, the actuator 1000 proposed in the present invention is basically provided with n actuator modules 100, 200, and 300, each of which performs independent functions, as shown in FIG. The n actuator modules 100, 200, and 300 correspond to actuators that are implemented by being physically coupled to each other.

3 is a diagram showing the detailed configuration of the actuator module (100, 200, 300) according to an embodiment of the present invention. The actuator module 300 illustrated in FIG. 3 corresponds to an actuator module located third of the n actuator modules 100, 200, and 300 illustrated in FIGS. 1 and 2.

The n actuator modules 100, 200, and 300 differ only in their overall shape and physical structure according to their coupling positions, and internal configurations for linearly moving a lens or a carrier equipped with lenses in the optical axis direction correspond to each other. Description of the internal configuration of the actuator module (100, 200) will be omitted.

3 is a view showing the actuator module 300 based on the XZ plane which is an optical axis, and the lower view is a view corresponding to the above drawing and shows the actuator module 300 with respect to the XY plane.

As shown in FIG. 3, the actuator module 300 includes a fastening part 305, a driving part 333, a carrier 320, a lens mounting space 321, a circuit board 330, a yoke 340, and a housing 350. ), The guide rail 360, the ball 370, the magnet 380 and the coil 390 may be configured.

The housing 350 is configured to correspond to the base or the body of the actuator module 300, and the carrier 320 linearly moves in the optical axis direction with respect to the housing 350. The lens 320 is mounted in the lens mounting space 321 formed in the center portion of the lens 320 to linearly move together as the carrier 320 linearly moves in the optical axis direction.

One side of the carrier 320 is provided with a magnet 380, the housing 350 is provided with a coil 390 facing the ear magnet 380, the power of the appropriate size and direction according to the external control signal, etc. coil When applied to 390, a corresponding magnetic force is generated in the coil 390, and the carrier 320 provided with the magnet 380 linearly moves in the optical axis direction by the generated magnetic force.

As described above, although the driving unit 333 of the present invention may be implemented by the magnet 380 and the coil 390, the driving unit 333 may be implemented by using another driving source in addition to the magnetic force.

In order to more accurately implement the optical axis movement of the carrier 320, the position of the carrier 320, specifically, the position of the magnet 380 provided in the carrier 320 may be detected using a hall effect. The driving sensor 391 may include a hall sensor or a built-in hall sensor. The driving driver 391 may control the position of the carrier 320 more precisely by utilizing the signal output from the hall sensor and the characteristics (size and direction) of the power applied to the coil 390 as feedback control.

As shown in FIG. 3, a ball 370 may be disposed between the housing 350 and the carrier 320, through which the housing 350 and the carrier 320 are spaced at a predetermined interval. Can be maintained.

In addition, the carrier 320 of the present invention moves in the optical axis direction with respect to the housing 350 with a minimized frictional force due to rolling, moving and point-contact of the ball 370. Therefore, as well as noise reduction, the driving force can be minimized and the driving precision can be improved.

In order to maintain the separation between the housing 350 and the carrier 320 by an appropriate distance and to allow the linear movement of the carrier 320 to be guided more effectively, the ball 370 is shown in FIG. It is preferable that the guide rails 360 formed on at least one of the housings 350 are provided in a predetermined portion.

In the drawings, the guide rails 360 are illustrated in the form of grooves extending in the Z-axis direction. However, some of them may have various shapes for guiding the balls 370 or the shape of the grooves in which the balls 370 are accommodated. Of course, it may be implemented as.

In addition, some guide rails may have a V-shaped rail in cross section, and other guide rails may have a U-shaped rail in cross section in order to increase driving force and linear movement efficiency.

The yoke 340 of the present invention generates an attraction force in the magnet 380 provided in the carrier 320 so that the carrier 320 provided with the magnet 380 is not separated from the housing 350 and the carrier 320. Not only point contact with the ball 370, but also point contact between the housing 350 and the ball 370 can be effectively maintained.

According to the above-described configuration, the actuator module 300 of the present invention may be applied to the carrier 320 by a magnetic force generated by the coil 390 when power of an appropriate size and direction is applied to the coil 390 by an external control signal. A lens (not shown) provided in the carrier 320 is linearly moved in the optical axis (Z axis) direction.

4 is a view showing a structure or relationship between the upper actuator module and the lower actuator module of the present invention.

Hereinafter, a structure in which n actuator modules 100, 200, and 300 according to the present invention are physically coupled to each other will be described in detail with reference to FIG. 4 and the like.

As described above, the actuator 1000 of the present invention includes n or more actuator modules 100, 200, and 300, and the n or more actuator modules 100, 200, and 300 are based on the optical axis direction. It is configured to be physically coupled to each other in the vertical direction.

 Since the n actuator modules 100, 200, and 300 have relative relations in a coupling relationship, the n actuator modules 100, 200, and 300 are positioned at an upper side based on the optical axis direction among two adjacent actuator modules in the n actuator modules 100, 200, and 300. The actuator module will hereinafter be referred to as the 'parent actuator module'.

In the corresponding aspect, the actuator module adjacent to the upper actuator module and positioned lower than the upper actuator module based on the optical axis direction will be referred to as a 'lower actuator module'.

FIG. 4 is a diagram illustrating a mutual coupling relationship between the upper and lower actuator modules. The actuator module 200 located at the second position with respect to the optical axis among the three actuator modules 100, 200, and 300 illustrated in the drawing is upper. As the actuator module, the actuator module 300 located in the third with respect to the optical axis is illustrated as a lower actuator module.

The lower portion of the upper actuator module 200 is provided with a coupling portion 210 for inducing physical coupling, and the upper portion of the lower actuator module 300 is physically coupled with the coupling portion 210. A fastening part 305 is formed, which may be formed in a shape corresponding to 210.

If the coupling portion 210 of the upper actuator module 200 and the coupling portion 210 of the lower actuator module 300 can guide the mutual coupling of the upper and lower actuator modules 200 and 300 properly, concave and convex It can be made in various shapes or structures, including a combination, and may also be implemented in a structure in which mutual coupling is induced through a third member (shaft, etc.) according to the embodiment.

The upper actuator module 200 and the lower actuator module 300 may be aligned based on exactly the same optical axis direction to implement the precision of image generation. According to the present invention, the coupling part 210 and the fastening part 305 are configured to be physically coupled to each other, and the optical axis between the coupling part 210 and the fastening part 305 may be appropriately adjusted by adjusting the size, size, and the like thereof. It is configured to form a free space (S) for alignment.

After coupling the upper actuator module 200 and the lower actuator module 300 to the equipment or device for optical axis alignment, a jig for physically supporting the upper actuator module 200 and the lower actuator module 300 may be used. The optical axis alignment operation is performed by precisely adjusting the position of the upper actuator module 200 or the lower actuator module 300 in the free space S.

As described above, since the actuator modules 100, 200, and 300 according to the present invention all correspond to one completed component, it is possible to effectively support the actuator modules 100, 200, and 300 with a jig for aligning the optical axis. In addition, the position of the actuator module 100, 200, 300 itself can be moved more easily and accurately, thereby increasing the efficiency of the optical axis alignment operation itself.

As such, the free space S between the coupling part 210 and the fastening part 305 is used as a space for optical axis alignment between the upper actuator module 200 and the lower actuator module 300. When the optical axis alignment process between the upper actuator module 200 and the lower actuator module 300 is completed, the upper actuator module 200 and the lower actuator module 300 are fixedly coupled.

As illustrated in FIG. 4, the coupling part 210 of the upper actuator module 200 may be configured in two, and one may be configured in a protruding form (the right coupling part based on FIG. 4), and the other may be a groove part. Branch can be configured in the form (left reference portion of Fig. 4).

When configured in this way, the fastening part 305 of the lower actuator module 300 coupled to the upper actuator module 200 has a shape in which one has a groove (a right fastening part based on FIG. 4) and the other Is configured to have a protruding form (left fastening reference to FIG. 4).

As such, the plurality of coupling parts 210 and the fastening part 305 are configured to be formed, and the concave and convex shapes are configured to be opposite to each other, so that between the upper actuator module 200 and the lower actuator module 300. The mutual coupling of can be induced to be more effective.

Reference numerals 330 and 230 shown in FIG. 4 serve as a circuit board for applying external power to the coils 390 and 290 or for interfacing external control signals to the driving drivers 390 and 190 (with a built-in hall sensor). .

The upper actuator module 200 illustrated in FIG. 4 may include a housing 250, a carrier 220, a guide rail 260, a yoke 240, and the like as described with reference to FIG. 3.

The inflow holes 215 and 315 illustrated in FIG. 4 have a coupling portion 210, a coupling portion 305, or a coupling portion 210 between the coupling portion 210 and the coupling portion 305 after the optical axis alignment process is completed as described above. It functions as a passage for allowing the adhesive to flow into the free space S or the like.

 After the optical axis alignment process is completed, the adhesive is introduced and cured, so that the coupling portion 210 and the fastening portion 305 are more easily fixed, thereby fixing the upper actuator module 200 and the lower actuator module 300. Work can be performed more effectively.

The inflow holes 215 and 315 into which the adhesive or the like is introduced are preferably provided in the side directions of the housings 250 and 350 exposed to the outside from each actuator module 200 or 300 so that the adhesive inflow process can be made more easily. Do.

In addition, the inflow holes 215 and 315 may be grooved rather than the engaging portion 210 or the fastening portion 305 implemented in the convex form as illustrated in FIG. More preferably, the coupling portion 210 or the coupling portion 305 is formed in a concave shape such as a space.

5 is a diagram illustrating a structure or relationship in which the optical system module 400 and the highest actuator module 100 of the present invention are coupled. The uppermost actuator module 100 refers to an actuator module that is uppermost with respect to an optical axis among the n actuator modules 100, 200, and 300.

As illustrated in FIG. 5, the optical system module 400 of the present invention also includes a housing 450 corresponding to a body or a base, and the optical system 401 is physically supported by the housing and rotates.

As shown in FIG. 5, the optical system module 400 and the top actuator module 100 of the present invention are also configured such that mutual optical axis alignment is achieved through coupling between the modules, or each module is a device as a whole.

The structure in which the optical system module 400 and the uppermost actuator module 100 are coupled to each other corresponds to the structure in which the upper actuator module 200 and the lower actuator module 300 described above are coupled to each other.

In detail, a second coupling part 410 is formed below the optical system module 400, and an upper portion of the uppermost actuator module 100 coupled with the optical system module 400 in the upper direction from the lower side of the optical system module 400. The two fastening portions 105 are formed. The optical system module 400 and the uppermost actuator module 100 are combined as a whole by combining the second coupling part 410 and the second coupling part 105 with each other.

The second coupling part 410 and the second fastening part 105 also have a second free space S2 for optical axis alignment and are physically coupled to each other, and through the second free space S2, an optical system. The optical axis alignment process is performed by controlling the module 400 or the uppermost actuator module 100 to move finely.

When the optical axis alignment process is completed, the adhesive is introduced into the second free space S2 using the second inflow hole 415 provided in one or more of the optical system module 400 or the uppermost actuator module 100 to cure the optical axis. The alignment is completed, the optical system module 400 and the top actuator module 100 is fixedly coupled.

As described with reference to FIG. 4, at least one of the optical system module 400 or the top actuator module 100 is a passage through which the adhesive is introduced after the optical axis alignment of the optical system module 400 and the top actuator module 100 is completed. It is preferable that a functioning second inflow hole 415 is formed.

Reference numerals 430 and 130 shown in FIG. 5 serve as a circuit board to apply external power to the coils provided in the optical system module 400 and the top actuator module 100, or to interface external control signals with a drive driver. .

6 is a view showing the configuration of the rear and the yoke (140, 240 340) of the actuator 1000 according to an embodiment of the present invention.

As described above, the yokes 140, 240, and 340 provided in the actuator modules 100, 200, and 300 are configured to generate a magnet and attraction force provided in the actuator module, as shown in FIG. It is preferable to configure so that the size of the upper and lower parts differentially based on.

As such, when the size of the upper and lower portions is differentially formed, a manpower of a relatively different size may be generated in relation to the magnets provided in the actuator modules 100, 200, and 300.

Therefore, when power is applied to the coils 190, 290, and 390 of the actuator modules 100, 200, and 300, the magnets may be moved to a position corresponding to a relatively large portion of the attraction force among the yokes 140 and 240 340. 180, 280, 380, that is, the carriers 120, 220, 320 equipped with the magnets 180, 280, 380 can be guided to move so that the initial positioning of the carriers 120, 220, 320 is aligned with the optical axis. Can be implemented more efficiently.

6 shows an example in which the size or width of the yoke becomes larger toward the downward direction based on the optical axis direction, but this is only one example, and the basic position of the carrier (coil) provided in each actuator module 100, 200, 300 is illustrated. The yoke (140, 240, 340) region of a relatively large size or width can be varied according to the setting of the position when the current is not applied to).

Reference numerals 130, 230, and 330 shown in FIG. 6 are circuit boards implemented by FPCB and the like. As shown in FIG. 6, these circuit boards 130, 230, and 330 may be arranged in a specific direction so as to effectively interface with the outside. It is desirable to configure it to be in a bent or extended form.

7 is a view showing a detailed configuration of the actuator module is implemented OIS according to an embodiment of the present invention.

OIS generally means a function of correcting camera shake by moving the lens in two axial directions perpendicular to the optical axis and in a combined direction thereof. The optical system module 400 described above may compensate for the shake in the Y-axis direction with respect to the imaging device by rotating the optical system 401 based on the YZ plane.

According to an embodiment, a configuration capable of compensating for hand shake in the X-axis direction is additionally added to at least one of the n actuator modules 100, 200, and 300 described above, thereby making it possible to correct hand shake in both the X and Y axes. It can be configured to.

FIG. 7 illustrates a configuration in which the configuration for the OIS is implemented together with the highest actuator module 100 among the n actuator modules 100, 200, and 300 described above.

As described above, when power of the appropriate size and direction is applied to the coil 190 provided in the housing 150 of the uppermost actuator module 100, the carrier 120 moves forward and backward in the optical axis direction. As illustrated in FIG. 7, since the OIS carrier 120-1 is provided on the carrier 120, when the carrier 120 moves up and down with respect to the optical axis (Z-axis), the OIS carrier 120-1 also includes a carrier. It moves up and down with reference to the optical axis with reference to 120.

As such, when the configuration for the optical axis direction movement (AF) and the configuration for the image stabilization in the uniaxial direction is integrated together in the uppermost actuator module 100, the lens may be provided on the OIS carrier 120-1 side. As such, when the lens is mounted on the OIS carrier 120-1, when the carrier 120 moves up and down in the optical axis direction, the lens may also move up and down in the optical axis direction, and thus AF may be implemented.

A second magnet 180-1 is mounted on one side of the OIS carrier 120-1, and a second coil 190-1 is provided in a direction facing the second magnet 180-1. When power of a magnitude and direction is applied to the second coil 190-1, a magnetic force corresponding thereto is generated in the second coil 190-1.

As such, when a magnetic force is generated in the second coil 190-1, the OIS carrier 120-1 having the second magnet 180-1 by the force causes the X-axis perpendicular to the optical axis direction on the carrier 120. To move forward and backward.

The second ball 170-2 is located between the carrier 120 and the OIS carrier 120-1, and at least one of the carrier 120 and the OIS carrier 120-1 is located on the second ball 170-2. The second guide rails 160-1 and 160-2 may be formed to guide). Since the roles or functions of the second ball 170-2 and the second guide rails 160-1 and 160-2 correspond to the balls 370 and the guide rails 360 described above, a detailed description thereof is omitted. do.

As shown in FIG. 7, the carrier 120 of the present invention generates an attractive force to the second magnet 190-1 mounted on the OIS carrier 120-1 so that the OIS carrier 120-1 has a carrier 120. The second yoke 140-1 may be further provided to guide the second ball 170-1 to maintain the point contact with the second ball 170-1.

In FIG. 7, reference numeral 191-1 denotes a driving driver with a built-in hall sensor. When the hall sensor detects the movement of the OIS carrier 120-1 by the hand shake, the reference signal 191-1 is used to correct the movement caused by the hand shake. A function of controlling the power to be applied to the second coil 190-1 with an appropriate size and direction for reversely moving the OIS carrier 120-1.

8 is a view showing the driving unit 133, 233, 333 of each actuator module (100, 200, 300) according to an embodiment of the present invention. When the actuator 1000 is mounted on the main board of the smart phone, the driving unit of each actuator module 100, 200, 300 as shown in FIG. 8 so that the overall thickness (Y-axis direction) of the actuator 1000 is not thickened. 133, 233, 333 is preferably configured to be provided on the side of the X-axis direction of each actuator module (100, 200, 300).

In addition, independent driving of each actuator module 100, 200, 300 is ensured, and the coils 190, 290, 390 and the magnets 180, 280, 380 of each actuator module 100, 200, 300 are secured. As shown in FIG. 8, the driving units 133, 233, and 333 of each actuator module 100, 200, and 300 may be provided at alternate positions left and right with respect to the X-axis direction to minimize mutual influence. Do.

For example, based on the second and third actuator modules 200 and 300 of the n actuator modules 100, 200, and 300, the driving unit 233 of the upper actuator module 200 may be configured to include the upper actuator module 200. The driving unit 333 of the lower actuator module 300 may be provided on one side of the left or right side and may be provided on the side opposite to the direction in which the driving unit 233 of the upper actuator module 200 is provided.

9 is a view showing a detailed configuration of the actuator module (100, 200, 300) according to another embodiment of the present invention, the lower view of Figure 9 to reveal the internal structure of the actuator module (100, 200, 300) The cross section of the center part of the actuator module 100,200,300 based on an optical axis is shown.

As shown in FIG. 9, the actuator modules 100, 200, and 300 of the present invention allow the carriers 320, 120, and 220 to be supported by the shafts 398, 198, and 298 on one side, and the ball on the other side. Corresponds to the actuator module 100, 200, 300 having a complex structure to be supported by (370, 170, 270).

As shown in FIG. 9, a shaft 398 extending in the optical axis direction is provided at one side of the housing 350, and the shaft 398 is fitted into a through hole formed in the carrier 320.

By the coupling structure, when the magnetic force generated in the coil 390 is transmitted to the magnet 380, the carrier 320 moves up and down with respect to the optical axis direction along the shaft 398.

When the shaft 398 is provided at both sides to support the linear movement of the carrier as in the related art, the linear movement of the carrier cannot be driven precisely due to unnecessary and excessive frictional force.

Therefore, the actuator module 300 according to another embodiment of the present invention, as shown in FIG. 9, in order to simultaneously realize the precision and the frictional force reduction for the linear movement is provided with the shaft 398 on one side of the carrier 320. To support the linear movement of, the opposite side may be configured to support the carrier 320 by the ball 370.

Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

In the above description of the present invention, modifiers such as first and second are only terms of a tool concept used to relatively distinguish components from each other, and thus are used to indicate a specific order, priority, and the like. It should not be interpreted as being a term.

The accompanying drawings for the purpose of describing the present invention and the embodiments thereof may be shown in somewhat exaggerated form in order to emphasize or highlight the technical contents of the present invention. It is to be understood that various forms of modification application may be possible in view of the person skilled in the art.

1000: actuator of the present invention
100, 200, 300: actuator module 400: optical system module
210: coupling portion 215 (315): inlet hole
305 (105, 205): fastening portion
333 (133, 233): drive unit 320 (120, 220): carrier
330 (130, 230): circuit board 340 (140, 240): yoke
350 (150, 250): housing 360 (160, 260): guide rail
370 (170, 270): Ball 380 (180, 280): Magnet
390 (190, 290): Coil 391 (191, 291, 391-1): Driving driver
398 (198, 298): shaft
120-1: OIS carrier 160-1, 160-2: second guide rail
170-2: second ball 180-1: the second magnet
190-1: 2nd coil 191-1: Driving driver

Claims (10)

An actuator for a camera to which n (n is a natural number of two or more) actuator modules, each of which includes a housing, a carrier on which a lens is mounted, and a driving unit for linearly moving the carrier in an optical axis direction,
Of the two actuator modules adjacent to each other in the n actuator module, the upper actuator module positioned at an upper side with respect to the optical axis direction is provided with a coupling part at a lower portion thereof.
The lower actuator module positioned lower than the upper actuator module based on the optical axis direction has a fastening portion coupled to a coupling portion of the upper actuator module at an upper portion thereof.
The coupling part and the fastening part has a free space for optical axis alignment, the actuator for a modular coupling camera, characterized in that the physically coupled to each other. The method of claim 1, wherein at least one of the upper or lower actuator modules is
And an inlet hole for introducing an adhesive into the free space after the alignment of the upper and lower actuator modules is completed. The method of claim 1, wherein one of the coupling portion or the fastening portion,
It is made of a convex shape, the other one of the actuator for a module-coupled camera, characterized in that the concave shape corresponding to the convex shape. The method of claim 1,
The module coupling type further includes an optical system module disposed on an uppermost actuator module positioned at the top of the n actuator modules based on the optical axis direction and reflecting light from a subject incident from the outside in the optical axis direction. Actuator for the camera. The method of claim 4, wherein the optical system module,
The second coupling portion is formed at the bottom,
The uppermost actuator has a second fastening portion coupled to the second coupling portion of the optical system module is formed on the top,
And the second coupling portion and the second coupling portion have a second free space for optical axis alignment, and are physically coupled to each other. The method of claim 5, wherein at least one of the optical system module or the top actuator module,
And a second inlet hole for introducing an adhesive into the second free space after the optical axis alignment of the optical system module and the uppermost actuator module is completed. The method of claim 1, wherein the driving unit,
A magnet provided in the carrier and a coil facing the magnet and generating a driving force to the magnet,
The n actuator module,
And a ball provided between the carrier and the housing, and a yoke provided in the housing to generate an attraction force to the magnet. The method of claim 7, wherein the drive unit of the upper actuator module,
It is provided on one of the left or right side of the upper actuator module,
The driving unit of the lower actuator module,
Actuator for a module-coupled camera, characterized in that provided on the side opposite to the direction provided with the drive unit of the upper actuator module. The method of claim 7, wherein the yoke,
The actuator for the module-coupled camera, characterized in that the size of the upper and lower portions are made differentially based on the optical axis direction. The method of claim 1, wherein at least one of the n actuator modules comprises:
An OIS carrier moving in a direction perpendicular to the optical axis with respect to the carrier and having a second magnet, a second ball located between the OIS carrier and the carrier, and a second facing the second magnet and generating a driving force And a coil and a second yoke for generating attraction to the second magnet.

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