KR20210076347A - Actuator for camera and camera module including it - Google Patents

Abstract

An actuator for a camera of the present invention comprises: a first OIS carrier positioned on an upper part of a base and moving in a first direction perpendicular to the optical axis; a first elastic body having one end fixed to the side surface of the base and the other end fixed to the side surface of the first OIS carrier and elastically supporting the movement of the first OIS carrier in the first direction; a second OIS carrier positioned on an upper part of the first OIS carrier and moving in a second direction perpendicular to both the optical axis and the first direction; and a second elastic body having one end fixed to the side surface of the first OS carrier and the other end fixed to the side surface of the second OIS carrier and elastically supporting the movement of the second OIS carrier in the second direction. At least one of the first elastic body and the second elastic body has an asymmetric shape on the left and right based on the optical axis direction. Accordingly, it is possible to provide a more stable driving performance.

Description

Actuator for camera and camera module including same

The present invention relates to an actuator for a camera and a camera module including the same, and more particularly, to an actuator for a camera that implements handshake correction using an improved elastic support structure.

As hardware technology for image processing develops and user needs for image shooting increase, autofocus (AF, Auto Focus) is applied to camera modules installed in mobile terminals such as mobile phones, smart phones, etc., as well as independent camera devices. Functions such as optical image stabilization (OIS) are being implemented.

The autofocus (autofocus control) function adjusts the focal length with the subject by moving the carrier on which the lens is mounted linearly in the optical axis direction to create a clear image on the image sensor (CMOS, CCD, etc.) provided at the rear end of the lens. means function.

In addition, the hand shake correction function refers to a function of improving image sharpness by adaptively moving a carrier on which the lens is mounted in a direction to compensate for the shake when the lens shakes due to hand shake.

One of the representative methods for implementing the autofocus or OIS function is to install a magnet (coil) on a moving body (carrier), install a coil (magnet) on a fixed body (housing or other type of carrier, etc.), and then install the coil and magnet It is a method of moving the moving object in the direction of the optical axis or in the direction perpendicular to the optical axis by generating electromagnetic force between them.

In the case of a device (camera module or actuator, etc.) in which AF and OIS functions are integrated, AF must move in the direction of the optical axis and OIS must move in the direction perpendicular to the optical axis. Therefore, a complex physical structure in which AF and OIS carriers are stacked is created. Furthermore, since individual magnets and coils for driving AF or OIS must be arranged in a complex manner, a space for these components must be additionally secured.

Therefore, in the case of the conventional device, it can be said that there is a problem in that it has a fairly complicated structure and an enlarged size, and thus does not meet the trend of miniaturization or slimming.

In addition, some devices have been disclosed in which a moving object is dualized so that movement in each direction perpendicular to the optical axis is performed independently. However, in the case of such a conventional device, only a configuration that physically supports each dualized moving object is applied, so an unintended direction As a result, it cannot effectively suppress the movement or flow of the movable body, so there is a problem in that the precision of the linear movement of the movable body in each direction is lowered.

Furthermore, in the case of a conventional device, the movable body is supported by an elastic body with weak rigidity so that movement in each direction perpendicular to the optical axis can be effectively performed. In this case, when an external shock is applied, the external impact is intensively transmitted to the elastic body as it is, There is a problem in that normal operation of the device itself cannot be achieved because physical damage or deformation of the device occurs.

The present invention was devised to solve the above-mentioned problems in the background as described above, and not only can space utilization be implemented more effectively, but also improves durability through structural improvement that effectively absorbs and disperses external shocks, as well as each An object of the present invention is to provide an actuator for a camera capable of more effectively improving the precision of movement in each direction and a camera module including the same.

Other objects and advantages of the present invention can be understood from 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 the combination of the configuration.

The actuator for a camera of the present invention for achieving the above object is located on the upper portion of the base, the first OIS carrier moving in a first direction perpendicular to the optical axis; a first elastic body having one end fixed to the side surface of the base, the other end fixed to the side surface of the first OIS carrier, and elastically supporting movement of the first OIS carrier in a first direction; a second OIS carrier positioned above the first OIS carrier and moving in a second direction perpendicular to both the optical axis and the first direction; and a second elastic body having one end fixed to the side surface of the first OS carrier, the other end fixed to the side surface of the second OIS carrier, and elastically supporting the movement of the second OIS carrier in the second direction. At least one of the first elastic body and the second elastic body of the present invention may be configured to have an asymmetric shape on the left and right with respect to the optical axis direction.

In addition, the actuator according to the present invention is provided inside the second OIS carrier, the AF carrier moving in the optical axis direction; and an AF elastic body physically connected to the AF carrier and the second OIS carrier to elastically support the movement of the AF carrier in the optical axis direction.

Furthermore, the present invention includes a first magnet provided in the first OIS carrier; a second magnet provided on the second OIS carrier; a first OIS coil provided on the base and facing the outside of the first magnet; a second OIS coil provided on the base and facing the outside of the second magnet; and an AF coil provided on the outer periphery of the AF carrier and facing the inside of the first and second magnets.

Here, the first elastic body of the present invention includes a first end fixed to the base; a second end fixed to the first OIS carrier and fixed to a position biased outward than the first end; and a first rain part including one or more bent parts and connecting the first end and the second end.

In addition, the second elastic body includes a third end fixed to the first OIS carrier; a fourth end fixed to the second OIS carrier and fixed to a position biased inward than the third end; and a second lane part including one or more bent parts and connecting the third and fourth ends.

Preferably, the third end of the second elastic body according to the present invention may be configured to be electrically connected to the second end of the first elastic body, in this case, the AF elastic body is electrically connected to the AF coil, It may be configured to be electrically connected to the third end or the fourth end of the second elastic body.

In addition, the present invention is provided on one of the upper part of the base or the lower part of the first OIS carrier, the first protrusion having a shape protruding in the optical axis direction; and a first accommodating part provided on the other one of the upper part of the base or the lower part of the first OIS carrier where the first protrusion is not provided and having a shape corresponding to the first protrusion part.

According to an embodiment, the present invention provides a second protrusion provided on one of an upper portion of the first OIS carrier or a lower portion of the second OIS carrier and having a shape protruding based on an optical axis direction; and a second accommodating part provided in the other one of the upper part of the first OIS carrier or the lower part of the second OIS carrier in which the second protrusion is not provided and having a shape corresponding to the second protrusion.

A camera module according to another aspect of the present invention includes an actuator for a camera including the above-described configuration; a lens assembly mounted on the AF carrier; and an image sensor provided at the rear of the lens assembly with respect to the optical axis direction.

According to a preferred embodiment of the present invention, by improving the arrangement structure between the magnet and the coil implementing AF and OIS, the overall structure and shape of the device can be implemented in a more space-intensive form, thereby minimizing the overall size. Of course, it can be further optimized for miniaturization of the mobile terminal.

In addition, according to another preferred embodiment of the present invention, by improving the shape and structure of the elastic body that physically elastically supports the moving body, the elastic modulus for the elastic support in each direction is differentiated, so that the linear movement in each direction is more independent of course, it is possible to further improve the precision of linear movement in each direction.

Furthermore, according to the present invention, when an external shock is applied, it is possible to minimize external shock transmitted to the elastic body, thereby improving device durability and providing more stable driving performance.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to more effectively understand the technical spirit of the present invention together with the detailed description of the present invention to be described later, so that the present invention is described in these drawings It should not be construed as being limited only to the matters.
1 is a view showing the overall configuration of an actuator for a camera and a camera module according to a preferred embodiment of the present invention;
2 and 3 are views showing a base, a first OIS carrier, and a first elastic body interconnecting them according to a preferred embodiment of the present invention;
4 and 5 are views showing a first OIS carrier, a second OIS carrier, and a second elastic body interconnecting them according to a preferred embodiment of the present invention;
6 is a view showing a second OIS carrier, an AF carrier, and an AF elastic body interconnecting them according to a preferred embodiment of the present invention;
7 is a view for explaining an electrical connection relationship in which external power is applied to an internal AF coil;
8 is a view showing an arrangement structure between magnets and coils;
9 is a view showing the structure of the protrusion and the receiving part according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Therefore, the configuration shown in the embodiments and drawings described in the present specification is only one of the most preferred embodiments of the present invention and does not represent all the technical spirit of the present invention, so various equivalents that can replace them at the time of the present application It should be understood that there may be water and variations.

1 is a view for explaining the overall configuration of an actuator (hereinafter referred to as an 'actuator') 100 for a camera according to the present invention and a camera module 1000 including the same. Hereinafter, the overall configuration of the present invention will be first described with reference to FIG. 1 , and specific embodiments of OIS and AF will be described later.

The actuator 100 and camera module 1000 of the present invention shown in FIG. 1 is an embodiment in which OIS and AF are implemented together, but the actuator 100 of the present invention, etc. is an actuator 100 for only OIS according to an embodiment. Of course, it can be implemented as

The Z-axis direction shown in FIG. 1 is an optical axis direction that is a direction in which light is introduced into the lens assembly 50 and corresponds to a direction in which the AF carrier 140 moves forward and backward as will be described later.

In addition, the X-axis and Y-axis shown in FIG. 1 and the like are two directions on a plane perpendicular to the optical axis (Z-axis) direction, and the lens assembly 50 is moved by OIS driving to compensate for shaking caused by hand shake. . In the following description, the X-axis direction is referred to as the first direction and the Y-axis direction is referred to as the second direction, but this is only an example according to a relative point of view, and any one of the X-axis and the Y-axis is the first direction and the other Of course, one direction may be the second direction.

As shown in FIG. 1, the actuator 100 of the present invention includes a base 110, a first OIS carrier 120, a second OIS carrier 130, an AF carrier 140, a first elastic body 200, a second elastic body 300 and the AF elastic body 150 may be included.

The base 110 is a configuration corresponding to the basic frame structure of the actuator 100 according to the present invention. In order to increase the efficiency of the assembly process, as shown in FIG. 1 , the guide serves as the main base 110-1 and the housing. It may be dualized as the base 110 - 2 , and may be formed as a single object, which is an integral body according to an embodiment. Of course, the case 192 functioning as a shield can may be coupled to the base 110 according to the embodiment.

The AF carrier 140 is a moving object that moves forward and backward based on the optical axis direction. When the AF carrier 140 moves in the optical axis direction, a CCD (Charged-coupled Device), CMOS (Charged-coupled Device) provided at the rear end of the actuator 100 (based on the optical axis direction) An autofocus function is implemented by adjusting a focal length between an imaging device (not shown) such as a complementary metal-oxide semiconductor) and the lens assembly 50 .

When the actuator 100 of the present invention implements only OIS, the lens assembly 50 may be mounted on a second OIS carrier 130 to be described later, and the actuator 100 of the present invention integrates AF and OIS together. In this case, the lens assembly 50 may be mounted on the AF carrier 140 .

As shown in FIG. 1, the AF carrier 140 is elastically supported by being physically connected to each other through the second OIS carrier 130 and the AF elastic body 150, and the AF driving unit ( When the driving of 160) is finished, it is returned to the initial position by the elastic restoring force of the AF elastic body 150 having a leaf spring shape.

The first OIS carrier 120 of the present invention moves in the first direction with respect to the base 110 when the OIS in the first direction is driven. In this respect, the first OIS carrier 120 corresponds to a movable body, and in a corresponding point of view, the base 110 corresponds to a fixed body.

The first OIS driving unit 170 is configured to linearly move the first OIS carrier 120 in the first direction with respect to the base 110, and the first OIS carrier 120 is driven using an external control signal or a sensed signal system. Of course, if it can be moved in the first direction, it can be implemented in various applications such as shape memory alloy (SMA), piezoelectric element, and micro electro mechanical system (MEMS).

However, considering the efficiency of device miniaturization, power consumption, noise suppression, space utilization, linear movement characteristics, precision control, etc., the first OIS driving unit 170 is implemented in the form of applying the electromagnetic force generated between the magnet and the coil. desirable. The second OIS driving unit 180 and AF driving unit 160 to be described later are also the same.

Specifically, the first OIS driving unit 170 according to a preferred embodiment of the present invention includes the first magnet 171 provided in the first OIS carrier 120 as a moving body and a first OIS coil provided at the side of the base 110 as a fixed body ( 172) may be included.

According to the embodiment, a detection sensor (not shown) such as a Hall sensor may be further included, and in this case, a detection sensor (not shown) such as a Hall sensor generates an electric signal corresponding to the direction and size of movement due to hand shake to the driving driver ( When transmitted to the first OIS coil 172 ), the driving driver (not shown) controls power of the corresponding magnitude and direction to be applied to the first OIS coil 172 .

When power is applied to the first OIS coil 172, the first OIS coil 172 generates a magnetic force in the first magnet 171 installed in the first OIS carrier 120, and the first OIS carrier 120 is formed by the generated magnetic force. move in the first direction. Of course, the sensing of the hall sensor and the processing of the driving driver may be cyclically performed through feedback control.

Since the second OIS carrier 130 of the present invention moves in the second direction with respect to the first OIS carrier 120 when the OIS in the second direction is driven, the second OIS carrier 130 corresponds to a movable body, and a corresponding viewpoint In the first OIS carrier 120 corresponds to the fixed body.

In this regard, the first OIS carrier 120 of the present invention corresponds to a movable body in relation to the base 110 , but corresponds to a fixed body in relation to the second OIS carrier 130 .

As described above, when the first OIS carrier 120 is moved by the driving of the first OIS driving unit 170, the second OIS carrier 130 is mounted on the first OIS carrier 120 and movement in the corresponding direction is suppressed. Since the physical guide is formed, the second OIS carrier 130 also moves together with the first OIS carrier 120 in the first direction.

However, since the second OIS carrier 130 is a movable body that moves with respect to the first OIS carrier 120 , when the second OIS carrier 130 moves in the second direction, the first OIS carrier 120 does not move.

On the other hand, in the case of the embodiment in which the AF carrier 140 on which the lens assembly 50 is mounted is installed in the second OIS carrier 130 , the AF carrier 140 is independent only in the optical axis direction with respect to the second OIS carrier 130 . Therefore, when the OIS in the first or second direction is driven, the lens assembly 50 also moves in the first or second direction.

The second OIS driver 180 is configured to linearly move the second OIS carrier 130 with respect to the first OIS carrier 120 , and for the same reason as described in the first OIS driver 170 , the second magnet 181 and the second OIS It is preferably configured to include a coil (182).

As shown in the drawings, the first OIS coil 172 , the second OIS carrier 130 , etc. may be provided in the form of being mounted on the circuit board 193 coupled to the guide base 110 - 2 and the like.

Hereinafter, the first OIS carrier 120 and related configurations according to an embodiment of the present invention moving in the first direction with respect to the base 110 will be described in detail with reference to FIGS. 2 and 3 .

The first OIS carrier 120 of the present invention is located above the base 110, moves in a first direction (X-axis direction) perpendicular to the optical axis, and constitutes a first OIS driving unit 170 in the first OIS carrier 120. One or a plurality of first magnets 171 are provided.

As shown in FIG. 2 , the first magnet 171 of the present invention may be mounted on the first OIS carrier 120 through the first yoke frame 173 having an open center portion. Through this configuration, physical durability can be increased, and the first magnet 171 can be mounted on the first OIS carrier 120 in a state in which both the outside and the inside of the first magnet 171 are exposed.

In this configuration, the first magnet 171 can face the first OIS coil 172 provided on the base 110 in the outward direction without a physical obstacle, and face the AF carrier ( It is possible to face the AF coil 161 provided in 140 in closer proximity without a physical obstacle, thereby simultaneously improving driving efficiency.

As will be described later, the AF coil 161 is provided on the outer periphery of the AF carrier 140 in such a way that it is wound, and when power of an appropriate size and direction is applied to the AF coil 161, the AF coil 161 is located outside the AF carrier 140 . A driving force is generated in relation to one magnet 171 so that the AF carrier 140 is linearly moved in the optical axis direction.

In this respect, the first magnet 171 simultaneously implements the function as the first OIS driving unit 170 and the function as the AF driving unit 160 . The second magnet 181 to be described later is also the same.

As described above, the present invention utilizes the first magnet 171 and the second magnet 181 as a common object implementing both the OIS function and the AF function, so that a magnet for OIS and a magnet for AF must be provided respectively. By contrast, space utilization can be further improved.

The first elastic body 200 of the present invention has an overall standing shape, one end is fixed to the side surface of the base 110 and the other end is fixed to the side surface of the first OIS carrier 120 and the first OIS It elastically supports movement of the carrier 120 in the first direction.

The first elastic body 200 has two pairs [(200-1) provided on each side facing each other as exemplified in FIG. 2 so that the physical elastic support force between the first OIS carrier 120 and the base 110 is effectively implemented. , 200-2), (200-3, 200-4)].

Specifically, the first elastic body 200 according to a preferred embodiment of the present invention has an overall thin plate shape, a first end 210 fixed to the side surface of the base 110, and the first OIS carrier 120 . The second end 220 fixed to the , and the first end 210 and the second end 220 interconnecting the first including at least one bent portion (230-A, 230-B, 230-C) It may be configured to include a first lane part 230 .

In addition, the first elastic body 200 may be configured such that its overall shape is asymmetrical on the left and right with respect to the optical axis direction (Z-axis direction), and furthermore, the second end 220 of the first elastic body 200 is the second It may be configured to be fixed to the position D1 biased outward than the first end 210 .

In this configuration, the elastic support for the movement of the first OIS carrier 120 in the first direction (X-axis direction) can be induced to be smooth and flexible, and at the same time, the first OIS carrier 120 moves in the second direction or The flow phenomenon can be suppressed more effectively.

That is, when the shape and structure of the first elastic body 200 are implemented as described above, the elastic modulus for movement in the first direction can be minimized within an appropriate range, and the elastic modulus for movement in the second direction is further strengthened. can be

In order to further enhance this effect, it is preferable that the first elastic body 200 pairs 200-1 and 200-2 provided on each side have opposite shapes with respect to the optical axis and the corresponding direction axis.

The through hole 211 formed in the first end 210 of the first elastic body 200 is fitted to the protrusion 111 formed in the base 110 in order to increase the efficiency of the assembly process, etc., and the first elastic body 200 of the The through hole 221 formed in the second end 220 may be configured to be fitted to the protrusion 121 formed in the first OIS carrier 120 .

Hereinafter, with reference to FIGS. 4 and 5 , an embodiment of the present invention that moves in a second direction perpendicular to both the optical axis (Z-axis) and the first direction (X-axis direction) with respect to the first OIS carrier 120 . The second OIS carrier 130 and related configurations will be described in detail.

The second OIS carrier 130 of the present invention is located above the first OIS carrier 120 (based on the optical axis), and corresponds to a movable body moving in the second direction (Y-axis direction).

One or a plurality of second magnets 181 constituting the second OIS driving unit 180 are provided in the second OIS carrier 130, and as illustrated in the drawing, mutual influence such as mutual interference of magnetic forces in each direction is minimized. The second magnet 181 is preferably provided in a direction perpendicular to the first magnet 171 .

The second magnet 181 of the present invention is shown in FIG. 4 and is attached to the second OIS carrier 130 through the second yoke frame 183 having an open shape in the middle like the first magnet 171 described above. It is preferable to configure it to be mounted.

In this configuration, the second magnet 181 can face the second OIS coil 182 provided on the base 110 in an outward direction without a physical obstacle, and face the AF carrier ( It is possible to face the AF coil 161 provided in 140 in closer proximity without a physical obstacle, thereby simultaneously improving driving efficiency.

Therefore, as described above with respect to the first magnet 171 , the second magnet 181 also performs the function as the second OIS driving unit 180 and the function as the AF driving unit 160 at the same time.

The second elastic body 300 of the present invention has a configuration in which one end is fixed to the side surface of the first OIS carrier 120 and the other end is fixed to the side surface of the second OIS carrier 130 . It elastically supports movement in the second direction (Y-axis direction).

The second elastic body 300 also, like the first elastic body 200, each side facing each other as illustrated in FIG. 4 to effectively implement the physical elastic support force between the first OIS carrier 120 and the second OIS carrier 130 . It can be implemented as two pairs [(300-2, 300-3), (300-1, 300-4)] provided in .

Specifically, the second elastic body 300 according to a preferred embodiment of the present invention has a thin plate-like shape as a whole, and a third end 310 fixed to the side surface of the first OIS carrier 120, the second OIS carrier ( A fourth end 320 fixed to 130 and interconnecting the third end 310 and the fourth end 320 and including one or more bent portions 330-A, 330-B, 330-C The second lane part 330 may be included.

In addition, the second elastic body 300 may be configured such that the overall shape thereof is asymmetric to each other on the basis of the optical axis direction (Z-axis direction), and further, the fourth end 320 of the second elastic body 300 is the first It can be configured to be fixed to the position (D) biased inward than the third end (310).

In this configuration, the elastic support for the second direction (Y-axis direction) movement of the second OIS carrier 130 may be induced to be smooth and flexible, and at the same time, the second OIS carrier 130 may move in the first direction or The flow phenomenon can be suppressed more effectively.

The through hole 311 formed in the third end 310 of the second elastic body 300 is fitted to the projection 121 formed in the first OIS carrier 120 in order to increase the efficiency of the assembly process, and the second elastic body 300 ), the through hole 321 formed in the fourth end 320 may be configured to be fitted into the protrusion 131 formed in the second OIS carrier 130 .

6 is a view showing the second OIS carrier 130, the AF carrier 140, and the AF elastic body 150 interconnecting them according to a preferred embodiment of the present invention. Hereinafter, a detailed configuration of the AF carrier 140 of the present invention will be described with reference to FIG. 6 and the like.

As shown in FIG. 6 , the AF carrier 140 of the present invention corresponds to a configuration that linearly moves in the optical axis direction in the inner space of the second OIS carrier 130 .

In the AF elastic body 150 of the present invention, some of the parts provided on the outside are physically connected to the second OIS carrier 130 , and some of the parts provided on the inside are physically connected to the AF carrier 140 . to elastically support the movement in the optical axis direction of the AF carrier 140 .

An AF coil 161 is provided on the outer periphery of the AF carrier 140, and when power of an appropriate size and direction is applied to the AF coil 161, a first magnet positioned in the outer circumferential direction of the AF coil 161 ( 171) (provided in the first OIS carrier 120) and the second magnet 181 (provided in the second OIS carrier 130) and the AF coil 161, a magnetic force is generated between the AF carrier 140 in the optical axis direction. will move

The AF elastic body 150 interconnecting the AF carrier 140 and the second OIS carrier 130 to improve the physical elastic support force of the AF carrier 140 and to effectively induce linear movement in the optical axis direction is an upper AF elastic body 150-1. and a lower AF elastic body 152 .

The lower AF elastic body 152 may be dualized into a first lower AF elastic body 152-1 and a second lower AF elastic body 152-2, as will be described later.

In order to increase the efficiency of the assembly process, etc., the first hole 153 formed in the upper AF elastic body 151 and the lower AF elastic body 152 is coupled to the first coupling part 137 formed in the second OIS carrier 130, and the upper AF is performed. The AF elastic body 150 is connected to the AF carrier 140 by fitting the second hole 155 formed in the elastic body 151 and the lower AF elastic body 152 to the second coupling part 147 formed in the AF carrier 140 . ) and the first OIS carrier 120 .

Reference numeral 194 shown in FIG. 6 denotes a first insert frame provided in the second OIS carrier 130 with one end exposed to the outside, and reference numeral 159-1 denotes a first lower AF elastic body 152-1. It is a first connection part formed at one end, and reference numeral 159-2 denotes a second connection part formed at one end of the second lower AF elastic body 152-2.

Hereinafter, an electrical connection structure in which external power is applied to the internal AF coil 161 will be described in detail with reference to FIG. 7 and the like.

As described above, the first elastic body 200 of the present invention is configured to elastically support the base 110 and the first OIS carrier 120 , and the first end 210 of the first elastic body 200 is the actuator 100 . ) is coupled to the base 110 located at the lowest part of the.

Therefore, in the case of interfacing the first end 210 of the first elastic body 200 with an external power source, electrical connection with an external power source is possible without adding a special structure for electrical connection.

On the other hand, the second end 220 of the first elastic body 200 is a part fixed to the first OIS carrier 120, the third end 310 of the second elastic body 300 of the present invention, and also the first OIS carrier ( 120) is a part that is fixed to the

Therefore, when implementing at least one of the second end 220 or the third end 310 in a bent shape, etc. as shown in FIGS. 4 and 7 , the first elastic body 200, the second end 220 and the second end The third end 310 of the two elastic body 300 may be naturally electrically connected to each other.

As shown in FIG. 6 , a first connection part 159-1 having a bent shape is provided at one end of the first lower AF elastic body 152-1, so the first connection part 159-1 and the second elastic body are provided. When the third end 310 or the fourth end 320 of 300 are configured to be mutually entertaining, the first lower AF elastic body 152-1 and the second elastic body 300 may be electrically connected.

The inner portion of the first lower AF elastic body 152-1 is physically coupled to the AF carrier 140, and the AF coil 161 is wound around the AF carrier 140, so the first lower AF elastic body 152-1. ) and the AF coil 161 may be electrically connected to each other only with a simple wiring structure.

When the structure for the electrical connection is described in order from the outside to the inside, the external power source → the first end 210 of the first elastic body 200 → the second end 220 of the first elastic body 200 → the second elastic body ( 300) of the third or fourth ends 310 and 320 → the first connection part 159-1 of the first lower AF elastic body 152-1 → the first lower AF elastic body 152-1 → AF coil 161 ) is the order of

According to the embodiment, an insert structure for enhancing durability of the actuator 100 may be added. In this case, the end portion of the first insert frame 194-1 is exposed to the outside, and the exposed portion is formed with a second elastic body. It may be electrically connected to the fourth end 320 of the 300 .

Therefore, in the case of the embodiment in which the first insert frame 194-1 is added, the electrical connection is external power → the first end 210 of the first elastic body 200 → the second end 220 of the first elastic body 200 ) → the third end 310 of the second elastic body 300 → the fourth end 320 of the second elastic body 300 → the end of the first insert frame 194-1 → the first lower AF elastic body 152- The first connection part 159-1 of 1) → the first lower AF elastic body 152-1 → the AF coil 161 is in the order.

In order to more effectively implement this electrical connection structure, the second end 220 of the first elastic body 200 and the third end 310 of the second elastic body 300 are at the same corner of the first OIS carrier 120 together. It is preferable to configure it so that it is arranged.

By dualizing the structure corresponding to the electrical connection structure described above, the AF coil 161 and the positive-power and negative-power (ground power) can form a single closed circuit/loop.

8 is a diagram illustrating an arrangement structure between magnets and coils according to the present invention.

As shown in FIG. 8, in the outermost part of the actuator 100 of the present invention, the first OIS coil 172 constituting the first OIS driving unit 170 and the second OIS coil 182 constituting the second OIS driving unit 180 are formed. this is placed As described above, since the configuration requiring power connection is disposed at the outermost portion, interfacing for electrical connection may be more easily implemented.

The hand shake correction in the X-axis direction (first direction) is implemented by a magnetic force generated between the first OIS coil 172 and the first magnet 171, and the hand shake correction in the Y-axis direction (second direction) is performed by the second OIS coil. It is implemented by the magnetic force generated between (182) and the second magnet (181).

As shown in the figure, the AF coil 161 is positioned in the innermost AF carrier 140, and the first OIS coil 172 and the second OIS coil 182 and the AF coil 161 described above. A first magnet 171 and a second magnet 181 are positioned.

Since the AF is driven by the magnetic force between the AF coil 161 and the first and second magnets 171 and 181, the first magnet 171 and the second magnet 181 of the present invention have OIS and It is an object that implements OIS in the Y-axis direction and an object that drives AF.

As described above, the present invention is configured so that magnets are disposed between different types of coils implementing OIS and AF, and by allowing the magnets to be shared for implementation of OIS and AF, the electromagnetic field configuration can be more simply implemented, such as device miniaturization, etc. can be further optimized.

9 is a view showing the structure of the projections (123, 125) and the receiving portion (113, 126) according to a preferred embodiment of the present invention.

The first OIS carrier 120 of the present invention is elastically supported on the base 110 by the first elastic body 200 , and the second OIS carrier 130 is elastically supported on the first OIS carrier 120 by the second elastic body 300 . It has a supported structure.

Therefore, the first OIS carrier 120 physically faces the base 110 but is spaced apart, and the second OIS carrier 130 physically faces the first OIS carrier 120 but is spaced apart from each other.

That is, since the first OIS carrier 120 is physically supported by the first elastic body 200 and the second OIS carrier 130 is physically supported by the second elastic body 300 , external shocks or vibrations are prevented from the first elastic body. (200) or the second elastic body 300 is applied to the physical deformation occurs in the first elastic body 200 or the second elastic body 300, it becomes difficult to implement a normal function.

In order to effectively solve this problem of the present invention, the first OIS carrier 120 and the facing portion between the base 110 and / or the second OIS carrier 130 and the first OIS carrier 120 in the facing portion between the concave / convex, etc. Through the same physical structure, it is configured such that the effect of external impact on the first elastic body 200 and the second elastic body 300 is minimized.

To this end, a first protrusion 123 having a shape protruding in the optical axis direction is provided on one of the upper part of the base 110 or the lower part of the first OIS carrier 120 . In this case, the base 110 or the first OIS carrier 120 . The first accommodating part 113 facing the first protruding part 123 or having a shape corresponding to the first protruding part 123 is provided in the other one of 120 that is not provided with the first protruding part 123 .

From a corresponding point of view, a second protrusion 125 having a shape protruding in the optical axis direction is provided on one of the upper portion of the first OIS carrier 120 or the lower portion of the second OIS carrier. In this case, the upper portion of the first OIS carrier 120 is provided. Alternatively, the second accommodating part facing the second protrusion 125 or having a shape corresponding to the second protrusion 125 in the other one of the lower portions of the second OIS carrier 130 that is not provided with the second protrusion 125 ( 135) is provided.

The embodiment shown in FIG. 9 is an example for implementing this, in which both the first protrusion 123 and the second protrusion 125 are provided in the first OIS carrier 120 positioned at the center with respect to the optical axis. Yes.

In this embodiment, the first accommodating part 113 facing the first protrusion 123 or having a shape corresponding to the first protrusion 123 is formed on the base 110 side, and the second protrusion 125 ) facing or having a shape corresponding to the second protrusion 125 is formed in the second OIS carrier 130 .

In this configuration, even when an impact is applied from the outside by falling, etc., the external force in the Z-axis direction first reaches the first and second protrusions 123 and 125 protruding in the Z-axis direction, so that the external shock is absorbed or dispersed, so It is possible to effectively overcome a phenomenon in which an impact is applied to the first elastic body 200 and the second elastic body 300 in the vertical direction in the Z-axis direction or external stress is accumulated.

In addition, since the first and second protrusions 123 and 125 have a protruding shape, when the liquid damper is applied to this portion, it functions as a kind of physical barrier to prevent the dispersion or dispersal of the liquid damper. Effects can also be provided.

In the above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto and will be described below with the technical idea of the present invention by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims.

In the above description of the present invention, modifiers such as first and second are only instrumental terms used to relatively distinguish between components, so they are used to indicate a specific order, priority, etc. It should not be construed as a term that

The accompanying drawings for the purpose of explaining the present invention and illustrating examples thereof may be shown in a somewhat exaggerated form in order to emphasize or highlight the technical contents of the present invention, but the above-described contents and matters shown in the drawings, etc. It should be construed as apparent that various types of modification application examples are possible at the level of those skilled in the art in consideration of this.

1000: camera module of the present invention
100: actuator
110: base 110-1: main base
110-2: guide base 113: first receiving part
120: first OIS carrier 123: first protrusion
125: second protrusion 130: second OIS carrier
135: second receiving unit 140: AF carrier
150: AF elastic body 151: upper AF elastic body
152: lower AF elastic body 160: AF driving part
170: first OIS driving unit 171: first magnet
172: 2nd OIS coil 180: 2nd OIS driving part
181: second magnet 182: second OIS coil
200: first elastic body 210: first end
220: second end 230: first rain part
300: second elastic body 310: third end
320: fourth end 330: second rain part

Claims (10)

a first OIS carrier positioned on the base and moving in a first direction perpendicular to the optical axis;
a first elastic body having one end fixed to the side surface of the base, the other end fixed to the side surface of the first OIS carrier, and elastically supporting movement of the first OIS carrier in a first direction;
a second OIS carrier positioned above the first OIS carrier and moving in a second direction perpendicular to both the optical axis and the first direction; and
and a second elastic body having one end fixed to the side surface of the first OS carrier, the other end fixed to the side surface of the second OIS carrier, and elastically supporting movement of the second OIS carrier in a second direction,
At least one of the first elastic body and the second elastic body is an actuator for a camera, characterized in that it has an asymmetric shape on the left and right with respect to the optical axis direction. The method of claim 1,
an AF carrier provided inside the second OIS carrier and moving in an optical axis direction; and
The actuator for a camera further comprising an AF elastic body physically connected to the AF carrier and the second OIS carrier to elastically support the movement in the optical axis direction of the AF carrier. 3. The method of claim 2,
a first magnet provided on the first OIS carrier;
a second magnet provided on the second OIS carrier;
a first OIS coil provided on the base and facing the outside of the first magnet;
a second OIS coil provided on the base and facing the outside of the second magnet; and
The actuator for a camera, which is provided on the outer periphery of the AF carrier and further comprises an AF coil facing the inside of the first and second magnets. According to claim 3, The first elastic body,
a first end fixed to the base;
a second end fixed to the first OIS carrier and fixed to a position biased outward than the first end; and
An actuator for a camera comprising one or more bent parts and a rain part connecting the first end and the second end. According to claim 4, The second elastic body,
a third end fixed to the first OIS carrier;
a fourth end fixed to the second OIS carrier and fixed to a position biased inward than the third end; and
An actuator for a camera comprising one or more bent parts and a rain part connecting the third and fourth ends. According to claim 5, wherein the third end of the second elastic body,
An actuator for a camera, characterized in that it is electrically connected to the second end of the first elastic body. The method of claim 6, wherein the AF elastic body,
The actuator for a camera, characterized in that electrically connected to the AF coil and electrically connected to the third end or the fourth end of the second elastic body. The method of claim 1,
a first protrusion provided on one of the upper part of the base and the lower part of the first OIS carrier and having a shape protruding in the optical axis direction; and
The actuator for a camera, characterized in that it further comprises a first accommodating part provided on the other one of the upper part of the base or the lower part of the first OIS carrier that is not provided with the first protrusion and having a shape corresponding to the first protrusion. The method of claim 1,
a second protrusion provided on one of an upper portion of the first OIS carrier or a lower portion of the second OIS carrier and having a shape protruding in an optical axis direction; and
The second accommodating part is provided on the other one of the upper part of the first OIS carrier or the lower part of the second OIS carrier where the second protrusion is not provided and further comprising a second accommodating part having a shape corresponding to the second protruding part. actuator. An actuator for a camera according to any one of claims 2 to 9;
a lens assembly mounted on the AF carrier; and
A camera module including an image sensor provided at the rear of the lens assembly with respect to the optical axis direction.

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