KR20210156424A - Actuator for reflector and camera module including it - Google Patents

Abstract

According to the present invention, an actuator for a reflectometer includes: a reflectometer which reflects light introduced from the outside in an optical axis direction; a support frame on which the reflectometer is installed; a middle frame supporting the support frame and having guide rails formed thereon; a base frame on which a groove part rail corresponding to the guide rails is formed; a first ball disposed between the guide rail and the groove part rail; and a first driving unit for moving the middle frame in a first direction based on the base frame. Among the guide rails, a first contact surface portion, which is a surface portion in contact with the first ball, is formed in a rounded shape, and among the groove rails, a surface portion opposite to the first contact surface portion, and a second contact surface portion, which is a surface portion in contact with the first ball, is formed in a rounded shape.

Description

REFLECTOR ACTUATOR AND CAMERA MODULE INCLUDING IT

The present invention relates to a reflectometer actuator and a camera module, and more particularly, to a reflectometer actuator that implements OIS and the like through improvement of a guiding structure that physically supports a ball.

As hardware technology for image processing develops and user needs for image shooting increase, autofocus (AF (Auto Focus), hand shake, etc. Functions such as correction (OIS, Optical Image Stabilization) are being implemented.

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

The hand-shake correction function refers to a function of improving image sharpness by adaptively moving a carrier (frame) on which a lens is mounted in a direction to compensate for hand shake when shaking occurs.

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 a moving object in the direction of the optical axis or in a direction perpendicular to the optical axis by generating an electromagnetic force between them.

On the other hand, in recent mobile terminals, zoom lenses having specifications such as being able to variably adjust the focal length or to shoot long-distance images in order to meet the higher user needs and to implement user convenience more diversified. is being installed

Since such a zoom lens has a structure in which a plurality of lenses or lens groups are arranged side by side, or a length of the lens itself in the optical axis direction is long, a larger mounting space must be provided in the mobile terminal.

Recently, in order to organically graft the physical characteristics of the zoom lens to the shape characteristics of the mobile terminal, an actuator or a camera module having a physical structure to refract the light of a subject using a reflectometer disposed at the front of the lens has been disclosed. .

These actuators employing a reflectometer, etc., implement OIS by moving the reflectometer that reflects the light of the subject in the direction of the lens in one or two axes, rather than moving the lens when shaking occurs.

Typically, such an actuator has a structure in which a guide rail is formed on a movable body and a fixed body, and a plurality of balls are disposed therebetween, so that the movable body rotates along the guide rail while being supported by the balls.

However, in the case of such a conventional device, since the movement of the reflectometer has to be implemented independently based on two directions (X-axis and Y-axis) perpendicular to the optical axis (Z-axis), the structure becomes quite complicated and driving precision is reduced. There are problems that are difficult to maintain.

In addition, even if the point contact is made precisely, not only the moving body but also the fixed body and the ball are simultaneously treated at multiple positions through the rail structure. This may be lowered.

Furthermore, when the moving object is physically supported and guided by the ball, it is common to add a yoke structure so that the object to be treated with the ball is in close contact with the ball. Since the ball is provided at a vertical position for each movement, a yoke must be provided in each direction, as well as a problem in that the attractive force is weakened due to the mutual interference of magnetic force.

The present invention was devised to solve the above-mentioned problems in the background as described above, and by changing the structure of the path for rotating and moving the reflectometer and improving the structure of the rail physically supported by the ball, An object of the present invention is to provide a reflectometer actuator capable of further improving precision according to rotational movement.

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.

Reflector actuator of the present invention for achieving the above object is a reflectometer for reflecting the light introduced from the outside in the optical axis direction; a support frame on which the reflectometer is installed; a middle frame supporting the support frame and having guide rails formed thereon; a base frame in which a groove part rail corresponding to the guide rail is formed; a first ball disposed between the guide rail and the groove part rail; and a first driving part for moving the middle frame in a first direction with respect to the base frame. In this case, the first facing part, which is a part of the guide rail that the first ball treats, is a part of the guide rail of the present invention. It may be formed in a rounded shape, and as a surface portion facing the first abutment surface portion of the groove rail, a second facing surface portion that is a surface portion to be treated by the first ball may be formed in a rounded shape.

Here, it is preferable that the first facing surface portion of the present invention be implemented as a surface portion located outside the guide rail, and the second facing surface portion of the present invention may be implemented as a surface portion located inside the groove portion rail, and the first and the second abutting surface portion may be formed of an inclined surface facing each other.

In addition, the opposite side of the first facing side of the guide rail of the present invention or the opposite side of the second facing side of the groove rail may be formed in a straight shape in a direction corresponding to the optical axis.

More preferably, a plurality of guide rails of the present invention may be formed on the outer rear surface of the middle frame, and in this case, a plurality of the groove part rails of the present invention may be formed on the inner front surface of the base frame.

Further, the present invention is formed on the support frame, the protrusion guider having a round shape; a receiving groove formed in the middle frame and supporting the rotational movement of the protruding guider; and a second driving unit for moving the support frame in a second direction with respect to the middle frame.

In this case, the present invention may further include a second ball disposed between the protrusion guider and the accommodating groove portion, and the second ball of the present invention is made in plural and spaced apart from each other with the protrusion guider interposed therebetween. It can be configured to be

In addition, it is preferable that the protrusion guider of the present invention is formed on the rear surface of the support frame, and the receiving groove is formed on the front surface of the middle frame.

Specifically, the second driving unit of the present invention is installed on the rear surface of the support frame, a second magnet exposed to the rear through the open space formed on the rear surface of the middle frame; and a second coil installed on the base frame to be exposed in the direction of the second magnet through an open space formed in the base frame.

Furthermore, the present invention may further include a yoke that is installed on the rear surface of the base frame so that the middle frame and the base frame and between the support frame and the middle frame are in close contact with each other at the same time to generate an attractive force to the second magnet.

According to an embodiment of the present invention, the point contact of the ball through the structural improvement so that the ball's bowling point is made on the outside (inside) of the rail formed in the moving body and the inside (outside) of the rail formed in the fixed body. (point contact) can be induced more accurately, of course, the number of points at which the ball is in point contact can be reduced, so that driving precision as well as driving efficiency can be further improved.

According to another embodiment of the present invention, by implementing a round structure having a radius of curvature of the outside (inside) of the rail formed in the moving body and the inside (outside) of the rail formed in the fixed body, hand shake (shake in the first direction) ), it is possible to induce the reflectometer to move to the rotation path more accurately during the correction drive.

According to another embodiment of the present invention, by implementing the protrusion guider to be supported by the ball, it is possible to induce the reflectometer to rotate accurately in the second direction with minimized frictional force, so that the precision of the handshake correction driving in the second direction is improved. can be further improved.

Furthermore, according to the embodiment of the present invention, a structure for rotating and moving the reflectometer in each direction can be arranged in the front and rear with respect to one axis (Y-axis), so that structural simplicity can be realized, of course, one With a (single) yoke, it is possible to provide the effect of simultaneously adhering the balls with different functions that support rotational movement in each direction and the object that physically treats these balls.

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 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 and a camera module according to a preferred embodiment of the present invention;
Figure 2 is an exploded view showing the detailed configuration of the actuator according to a preferred embodiment of the present invention;
3 and 4 are views showing the detailed configuration of the middle frame of the present invention,
5 and 6 are views showing the detailed configuration of the base frame of the present invention,
7 is a view showing the structure of the middle frame and the base frame serving the first ball of the present invention,
8 is a view for explaining the operating relationship of the rotational movement of the reflectometer of the present invention;
9 is a view showing a detailed configuration of the support frame of the present invention;
10 is a view showing a detailed configuration of the middle frame of the present invention for supporting the rotational movement of the support frame;
11 is a view for explaining the operating relationship of the rotational movement of the reflectometer of the present invention;
12 is a view for explaining a yoke and related structures according to 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 conventional 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 this specification is only the most preferred embodiment of the present invention and does not represent all of the technical idea of the present invention, so various equivalents that can 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 for explaining the overall configuration of a reflectometer actuator 100 (hereinafter referred to as an 'actuator') and a camera module 1000 including the same according to a preferred embodiment of the present invention.

Of course, the actuator 100 of the present invention can be implemented as a single device, and, as shown in FIG. 1 , the lens assembly 210 and the lens driving module 200 that implements autofocus of the lens assembly 210, etc. ) and may be implemented in the form of a camera module 1000 including an image sensor (not shown).

In the case of the present invention, the light of the subject does not directly flow into the lens assembly 210 and the path of light is changed (refracted, reflected) through the reflectometer 110 provided in the actuator 100 of the present invention. etc.) and then is configured to be introduced into the lens assembly 210 .

As illustrated in FIG. 1 , the path of light entering from the outside world is Z1, and the path of light entering the lens assembly 210 after being refracted or reflected by the reflector 110 is Z.

In the following description, a Z-axis direction corresponding to a direction in which light is introduced into the lens assembly 210 is referred to as an optical axis to an optical axis direction, and two directions perpendicular thereto are referred to as an X-axis and a Y-axis.

The lens assembly 210 may be a single lens as well as a zoom lens in which a plurality of lenses or lens groups or optical members such as prisms and mirrors may be included therein, and the lens assembly 210 is made of a zoom lens or a zoom lens barrel. In this case, a shape extending in the vertical longitudinal direction (Z-axis direction) may be formed.

Although not shown in the drawing, an image sensor such as CCD or CMOS that converts a light signal into an electric signal may be provided at the rear end of the lens assembly 210 based on the optical axis direction, and a filter that blocks or transmits a light signal of a specific band may be provided. Of course, they may be provided together.

As will be described later in detail, the actuator 100 of the present invention compensates for the movement when shaking due to hand shake occurs in the X-axis direction or/and the Y-axis direction perpendicular to the optical axis. ) corresponds to a device that implements OIS in the X-axis direction and/or the Y-axis direction by rotating.

In the drawings, etc., an embodiment for integrally implementing each of the X-axis direction and the Y-axis direction is shown, but this is only an example, and depending on the embodiment, for the correction of hand shake in either the X-axis direction or the Y-axis direction The camera shake correction in the other direction to which only the structure is applied and not applied may be implemented through other methods such as a method of linearly moving the lens assembly 210 .

2 is an exploded view showing the detailed configuration of the actuator 100 according to an embodiment of the present invention.

As shown in FIG. 2, the actuator 100 of the present invention has an opening 105 and a case 103 that functions as a shield can, a reflectometer 110, a support frame 120, and a middle frame. 130 , the base frame 140 , the circuit board 150 , and may be configured to include a first ball B1 and a second ball B2 .

First, the overall configuration and coupling relationship of the actuator 100 will be described with reference to FIG. 2 , and the detailed configuration and OIS driving relationship in each direction of the actuator 100 of the present invention will be described later.

As shown in FIG. 2, when light of the Z1 path flows into the actuator 100 of the present invention through the opening 105 of the case 103, the reflectometer 110 of the present invention determines the path of the introduced light. The light is introduced into the lens assembly 210 by changing (refraction or reflection, etc.) in the optical axis direction (Z).

The reflectometer 120 may be one selected from a mirror or a prism or a combination thereof, and furthermore, may be implemented with various members that can change the light introduced from the outside in the optical axis direction. to be.

As described above, the present invention is configured so that light flows into the lens assembly 210 after the path of light is refracted by the reflectometer 110 , so that it is not necessary to install the lens assembly 210 itself in the thickness direction of the portable terminal. Even if a lens having a long physical characteristic in the optical axis direction, such as such, is mounted on the portable terminal, the thickness of the portable terminal is not increased and thus the portable terminal can be optimized for miniaturization.

As is well known, OIS driving is implemented by moving the lens, etc. in the direction to correct the shake caused by hand shake. In the embodiment to which the present invention is applied, the reflectometer 110 is different from the method of moving the lens in reverse. OIS is driven by moving

The reflectometer 110 of the present invention is installed in the direction of the opening 105 of the case 103 through which light is introduced from the actuator 100 based on the example shown in FIG.

The reflectometer 110 is installed on the support frame 120 as shown in FIG. 2 and the like, and the support frame 120 is physically supported by the middle frame 130 to rotate based on the middle frame 130 . do.

As will be described later, when the support frame 120 of the present invention is rotationally moved with respect to the middle frame 130 (based on the YZ plane), the reflectometer 110 installed on the support frame 120 also rotates in the same direction. As the path of the light entering the image sensor is shifted in the Y-axis direction by the rotational movement of the reflectometer 110 , the hand shake in the Y-axis direction component is corrected.

In the following description, the direction of rotational movement based on the YZ plane in relation to the Y-axis direction image stabilization is referred to as the second direction. The direction is referred to as a first direction.

The support frame 120 of the present invention corresponds to a movable body in relation to movement in the second direction, and the middle frame 130 of the present invention corresponds to a fixed body in the corresponding viewpoint.

The second driving unit 170 is configured to provide a driving force for moving the support frame 120 in the second direction with respect to the middle frame 130 as described above, and as illustrated in the drawing, the second magnet 171 (Fig. 3) and the second coil 175 may be included.

When power of an appropriate size and direction is applied to the second coil 175, a magnetic force is generated between the second coil 175 and the second magnet 171, and the support frame 120 is rotated and moved by the generated magnetic force. will do The specific structure and configuration in which the support frame 120 is rotated and moved will be described later.

The second coil 175 is implemented in a form mounted on a circuit board 150, and the Y-axis of the reflectometer 110 is provided on the circuit board 150 by using a hall effect as shown in the figure. A second Hall sensor S2 for detecting a position, specifically, a position of the second magnet 171, etc. may be provided.

The Hall sensor 155 may be implemented in the form of a single chip together with a drive driver that controls the magnitude and direction of power applied to the drive coil 150 by using the output value of the Hall sensor 155 for feedback control. can

If the second driving unit 170 can rotate and move the support frame 120 using an external control signal or a sensed signal system, shape memory alloy (SMA), a piezoelectric element, a micro-precision mechanical system ( Of course, it can be implemented in various applications such as Micro Electro Mechanical System, MEMS).

However, in consideration of the efficiency of device miniaturization, power consumption, noise suppression, space utilization, linear movement characteristics, precise control, etc., as previously exemplarily described, the second driving unit 170 of the present invention and the first driving unit to be described later (160) is preferably implemented in the form of applying the electromagnetic force generated between the magnet and the coil.

Meanwhile, the middle frame 130 is physically supported by the base frame 140 to rotate (XZ plane) based on the base frame 140 .

As described above, the middle frame 130 is equipped with a support frame 120 on which the reflectometer 110 is installed. The reflectometer 110 also rotates in the same direction due to its physical movement, and the path of light entering the image sensor side by the rotational movement of the reflectometer 110 is shifted in the X-axis direction. The camera shake in the X-axis direction is corrected.

In this regard, based on the rotational movement (first direction rotational movement) for the X-axis direction handshake correction, the middle frame 130 of the present invention corresponds to a movable body, and the base frame 140 from the corresponding point of view is It functions as a fixed body.

That is, the middle frame 130 of the present invention corresponds to a movable body when the X-axis direction OIS is used as a reference, but corresponds to a fixed body with respect to the Y-axis direction OIS.

The first driving unit 160 of the present invention is a configuration that provides a driving force for rotational movement of the middle frame 130 with respect to the base frame 140. As shown in the drawing as an embodiment thereof, the first magnet ( 161) and the first coil 165 may be included.

As described in the description of the second driving unit 170, the X-axis direction position of the reflectometer 110 (specifically, the position of the first magnet 161) is sensed and an electrical signal corresponding to the sensed result is output. It goes without saying that the first Hall sensor S1 (see FIG. 5 ) may be applied.

When the first coil 165 of the power source of the appropriate size and direction is applied, a magnetic force is generated between the first coil 165 and the first magnet 161, and the middle frame 130 is moved in the XZ plane by the generated magnetic force. It will rotate based on . A specific structure and configuration in which the middle frame 130 rotates based on the base frame 140 will be described later.

Since the support frame 120 of the present invention has a structure capable of independent rotational movement based on the middle frame 130 , even if the middle frame 130 is rotationally moved based on the base frame 140 , the second coil 175 . When the electromagnetic force is generated, the support frame 120 may perform an independent rotational movement based on the YZ plane.

Hereinafter, a detailed configuration of the present invention in which the middle frame 130 is rotated and moved in the first direction with respect to the base frame 140 to implement OIS in the X-axis direction will be described in detail with reference to the accompanying drawings.

3 and 4 are views showing the detailed configuration of the middle frame 130 according to an embodiment of the present invention, and FIGS. 5 and 6 are the detailed configuration of the base frame 140 corresponding to the middle frame 130 . is a diagram showing

As described above and shown in FIG. 3 , in the middle frame 130 of the present invention, the support frame 120 on which the reflectometer 110 is mounted is mounted in the front (based on the Y-axis), and the middle frame 130 of the A first magnet 161 facing the first coil 165 is mounted on the side surface.

Reference numeral 171 shown in FIG. 3 denotes a second magnet provided on the rear surface of the support frame 120, and is exposed to the rear (based on the Y-axis direction) through the open space 130S of the support frame 120 (refer to FIG. 2 ). and faces the second coil 175 exposed forward (based on the Y-axis direction) through the open space 140S of the base frame 140 (see FIG. 6).

As shown in the figure, one or more guide rails 131 are formed on the rear surface of the middle frame 130 , and the first ball B1 disposed between the middle frame 130 and the base frame 140 is a part of it. is located on the guide rail 131 in a form accommodated in the guide rail 131 .

A part of the first ball B1 in the other direction is positioned on the groove rail 141 in a form accommodated in the groove rail 141 formed on the base frame 140 as will be described later.

The guide rail 131 is treated in a point-contact manner with the first ball B1, and as shown in the bottom view of FIG. 3 and the enlarged view of FIG. 4 , the first of the guide rails 131 . The first contacting surface portion 1311, which is the surface portion of which the ball B1 is treated, has a rounded shape having a radius of curvature R1 based on the XZ plane.

The first facing surface portion 1311 may be an inner surface portion of the guide rail 131, but as illustrated in the drawing so that the rotational movement of the movable body in the first direction (rotation based on the XZ plane) is more stably supported. Likewise, it is more preferable to configure the first facing surface portion 1311 to be an outer surface portion of the guide rail 131 .

In addition, as shown in the drawing, the first facing surface portion 1311 may be formed of an inclined surface. In this case, a more precise point contact with the first ball B1 is induced, and the point at which the point contact is made can be minimized.

Furthermore, it is preferable that the opposite side of the first facing surface portion 1311 of the guide rail 131 has a linear shape in a direction corresponding to the optical axis (Z-axis direction).

The base frame 140 of the present invention is a configuration corresponding to the middle frame 130 of the present invention described above, and as shown in FIG. 5 , the middle frame 130 is mounted in the front (based on the Y-axis direction). A space is provided, and a yoke 180 to be described later is installed in the rear.

One or more groove rails 141 corresponding to the guide rails 131 of the above-described middle frame 130 are formed in the base frame 140 of the present invention.

The groove rail 141 is served in a point-contact manner with the first ball B1, and as shown in the lower end of FIG. 5 and an enlarged view of FIG. 6 , the first ball B1 of the groove rail 141 The second facing surface portion 1411, which is the facing surface portion, has a rounded shape having a radius of curvature r1 based on the XZ plane, and the second facing surface portion 1411 corresponds to the first facing surface portion 1311. is preferably configured to be a surface portion located on the inner side of the grooved rail 141 .

The round shape of the second facing surface portion 1411 is formed based on the round shape of the first facing surface portion 1311 and concentric circles, and as shown in the drawing, considering the size of the first ball B1, etc. A radius corresponding to the round shape of the second facing surface portion 1411 is smaller than a radius corresponding to the round shape of the first facing surface portion 1311 .

If the first abutting surface portion 1311 is an embodiment configured to be the inner surface portion of the guide rail 131, the second abutting surface portion 1411 corresponds to the position of the first abutting surface portion 1311, the groove rail 141 It may be configured to be an outer surface portion of In this case, the radius corresponding to the round shape of the second facing surface portion 1411 is formed to be larger than the radius corresponding to the round shape of the first facing surface portion 1311 .

In addition, as described above, more precise point contact with the first ball B1 is induced and the second abutting surface portion 1411 and the inclined surface like the first abutting surface portion 1311 are slanted so that the point at which the point contact is made is minimized. It is preferable to configure it so that it is made of .

Furthermore, it is preferable to configure the opposite side of the second facing surface portion 1411 of the groove rail 141 to have a linear shape in a direction corresponding to the optical axis (Z-axis direction).

As shown in the drawing, a plurality of guide rails 131 of the present invention may be formed on the outer rear surface (based on the Y-axis direction) of the middle frame 130 , and grooved rails may face the guide rails 131 . A plurality of 141 may be formed on the inner front surface (based on the Y-axis direction) of the base frame 140 .

Although the guide rail 131 and the groove rail 141 are shown as four in the drawing, this is only an example, and may be provided in a larger number than this, and may be provided in three to enable three-position support according to the embodiment. Of course it could be.

7 is a view showing the structure of the middle frame 130 and the base frame 140 to serve the first ball (B1) of the present invention, Figure 8 is a reflectometer 110 of the present invention in the first direction It is a diagram explaining the operation relationship of rotation and movement.

As described above, the first ball B1 of the present invention is disposed between the guide rail 131 of the middle frame 130 and the groove rail 141 of the base frame 140, and the guide rail 131 . It is configured to face the first facing surface portion 1311 of the and the second facing surface portion 1411 of the groove rail 141 .

As shown in FIG. 7 , the first ball B1 faces the first abutting surface part 1311 on the outside (based on the X-axis) and at the top (based on the Y-axis), and the inside (based on the X-axis) and the lower part (based on the Y-axis) is configured to treat the second abutment surface portion 1411 in the first direction (XZ plane direction) through physical support and guiding by the first ball (B1) in this state, the middle frame 130 of the present invention rotate to move

That is, the second facing surface portion 1411 of the groove rail 141 provided in the base frame 140 and the first facing surface portion 1311 of the guide rail 131 are opposite to each other, preferably as shown in the drawing. As shown, the faces are opposite to each other in the oblique direction.

As shown in FIG. 7 , the first facing surface portion 1311 of the guide rail 131 is formed as a surface portion inclined at a predetermined angle (A˚) with respect to the X axis, and the second facing surface portion ( 1411) In addition, it becomes a surface part inclined at a predetermined angle (a˚). These angles are preferably identical to each other, but may be different from each other depending on the embodiment.

As shown in FIG. 8 , when power of an appropriate magnitude and direction is applied to the first coil 165 through feedback control by the first Hall sensor S1 , the first coil 165 and the middle frame 130 . A magnetic force is generated between the first magnets 161 installed in the , and the middle frame 130 rotates in the first direction by the generated magnetic force.

Since the support frame 120 is mounted on the middle frame 130 and the reflectometer 110 is installed on the support frame 120, when the middle frame 130 is rotated in the first direction in this way, the support frame ( 120) and the reflectometer 110 installed in the support frame 120 rotates the Y-axis to the rotation axis RA, so that the handshake correction of the X-axis direction component is implemented.

Hereinafter, a detailed configuration of the present invention in which the support frame 120 is rotated in the second direction with respect to the middle frame 130 to implement handshake correction in the Y-axis direction will be described in detail with reference to the accompanying drawings.

9 is a view showing a detailed configuration of the support frame 120 of the present invention, Figure 10 is a view showing a detailed configuration of the middle frame 130 of the present invention for supporting the rotational movement of the support frame (120) and FIG. 11 is a view for explaining the operation relationship in which the reflectometer 110 of the present invention rotates and moves.

As described above, the reflectometer 110 is mounted on the front (based on the Y-axis direction) of the support frame 120 of the present invention, and the second magnet 171 is installed on the rear side. In addition, a protrusion guider 121 having a rounded shape as shown in FIG. 9 is formed on the outer rear surface of the support frame 120 .

The protrusion guider 121 functions as a kind of rotation support shaft when the support frame 120 rotates in the YZ plane direction (second direction), and extends in the longitudinal direction (X-axis direction) as illustrated in FIG. 9 . It may have a semi-cylinder shape, depending on the embodiment.

In order to implement the rotational movement more stably, as illustrated in FIG. 9 , the protrusion guider 121 is preferably provided on each of both sides with respect to the second magnet 171 .

When the support frame 120 is mounted on the middle frame 130 , the protrusion guide 121 of the support frame 120 is inside the receiving groove 133 formed in front of the middle frame 130 (based on the Y-axis direction). and the receiving groove 133 supports the rotational movement of the protruding guider 121 .

According to the embodiment, one or more second balls B2 are disposed between the protrusion guider 121 and the receiving groove 133 so that the rotational movement of the protrusion guider 121 in the second direction can be implemented more flexibly with minimized friction. can be placed.

The receiving groove portion 133 is specifically interposed between the ball receiving portion 1331 and the ball receiving portion 1331 on which the second ball B2 is seated, and to be configured to include an intermediate portion 1333 facing the protruding guider 121. can

The second balls B2 may be formed in plurality, and as shown in FIG. 10 , may be disposed to be spaced apart from each other with the protrusion guide 121 interposed therebetween.

When power of an appropriate magnitude and direction is applied to the second coil 175 , a magnetic force is generated between the second coil 175 and the second magnet 171 , and the support frame 120 uses the generated magnetic force as a driving force. It moves based on the frame 130 .

At this time, since the protrusion guide 121 of the support frame 120 is physically supported and guided by the receiving groove 133 and the second ball B2, the support frame 120 moves in the second direction (YZ plane direction). to flexibly rotate.

As shown in FIG. 10 and the like, so that the physical support of the protrusion guider 121 and the rotational movement in the second direction are more precisely implemented, the second ball B2 is disposed at a position symmetrical to each other with respect to the protrusion guider 121 . It is preferable to configure

In addition, the receiving groove 133 formed in the middle frame 130 has a front (Y-axis reference) and an inner side (X-axis) as shown in FIG. 10 to effectively secure an organic coupling space with the support frame 120 . Reference) is preferably implemented as a space of an open shape.

As such, when the protrusion guide 121 of the support frame 120 is rotated in the second direction of the support frame 120 while being guided by the second ball B2, the reflectometer mounted on the support frame 120 ( 110) rotates in the second direction (based on the YZ plane).

When the reflectometer 110 is rotated in the second direction, the path of the light entering the image sensor is shifted in the Y-axis direction, and hand shake in the Y-axis direction component is corrected.

Hereinafter, the yoke of the present invention and the related structural relationship of the present invention will be described with reference to FIG. 12 and the like.

5 and 12, the second magnet 171 and the yoke 180 for generating attractive force are installed on the rear surface of the base frame 140 of the present invention.

12 (a), the second magnet 171 is installed on the support frame 120 and the second magnet 171 installed on the support frame 120 and the yoke installed on the back of the base frame 140 Since an attractive force is generated between (180), the entire support frame 120 is pulled in the yoke 180 direction (negative Y-axis direction).

Therefore, as shown in Fig. 12 (b), the protrusion guide 121 installed on the rear surface of the support frame 120 is also pulled in the yoke 180 direction and the second ball B2 is on the path where the attractive force acts. Because it is located in the protrusion guider 121 and the second ball (B2) is able to maintain the adhesion between (B2).

In addition, as described above, since the support frame 120 is mounted on the middle frame 130, the attractive force between the second magnet 171 and the yoke 180 installed on the support frame 120 is the middle frame 130 also, It acts as a driving force pulling in the direction of the yoke 180 .

Therefore, as shown in Fig. 12 (c), the guide rail 131 installed at the rear of the middle frame 130 is also pulled in the yoke 180 direction and the first ball B1 is on the path where the attractive force acts. Since it is located in the guide rail 131, the first ball (B1) and the groove portion rail 141 can be maintained in adhesion between.

According to the structure according to the present invention, the guide rail 131 and the receiving groove 133 respectively formed in the rear (Y-axis direction) and the front of the middle frame 130 are the second magnet 171 and the yoke 180 . ) are arranged in the same direction as the direction of attraction between them.

In addition, the first ball B1 for guiding the rotational movement between the support frame 120 and the middle frame 130 and the second ball for guiding the rotational movement between the middle frame 130 and the base frame 140 . (B2), both can be configured to be located on the same direction (Y-axis) line, so that the attractive force between the yoke 180 and the second magnet 171 is the first ball (B1) and the second ball (B2) at the same time can act as

Therefore, unlike the conventional device, it is possible to more simply and effectively attach the balls guiding the rotational movement in each direction and the objects that physically treat the balls with only a single yoke 180 . For reference, reference numeral 173 shown in FIG. 12 denotes a back yoke for preventing magnetic force from leaking to the outside and for concentrating magnetic force.

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 1st and 2nd are merely instrumental terms used to relatively distinguish components from each other, so they are used to indicate a specific order, priority, etc. It should not be construed as a term that is

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 obvious 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 of the present invention
110: reflectometer 120: support frame
121: protrusion guide 130: middle frame
130S: open space 131: guide rail
1311: first facing surface portion 133: receiving groove portion
1331: visible part 1333: intermediate part
140: base frame 140S: open space
141: groove rail 1411: second facing surface part
150: circuit board
160: first driving unit 161: first magnet
165: first coil 170: second driving part
171: second magnet 175: second coil
180: yoke B1: first ball
B2: 2nd ball

Claims (12)

a reflectometer that reflects the light introduced from the outside in the optical axis direction;
a support frame on which the reflectometer is installed;
a middle frame supporting the support frame and having guide rails formed thereon;
a base frame in which a groove part rail corresponding to the guide rail is formed;
a first ball disposed between the guide rail and the groove part rail; and
A first driving unit for moving the middle frame in a first direction with respect to the base frame,
Of the guide rail, the first facing surface portion, which is the surface portion to be treated by the first ball, is formed in a rounded shape, and as a surface portion of the groove portion rail that is opposite to the first contact surface portion, the first contact surface portion is the surface portion to be treated by the first ball A reflector actuator, characterized in that the two-contact surface portion is formed in a rounded shape. According to claim 1, wherein the first abutment surface portion,
It is a surface portion located on the outside of the guide rail,
The second facing surface portion is a reflector actuator, characterized in that the surface portion located inside the groove portion rail. The method of claim 1, wherein the first and second abutment surfaces,
Reflective actuator, characterized in that made of an inclined surface. The method of claim 1,
A reflectometer actuator, characterized in that the opposite side of the first facing surface of the guide rail or the opposite side of the second facing of the groove rail is formed in a linear shape in a direction corresponding to the optical axis. According to claim 1, wherein the guide rail,
A plurality is formed on the outer rear surface of the middle frame,
The reflector actuator, characterized in that the groove part rail is formed in plurality on the inner front surface of the base frame. The method of claim 1,
a protrusion guider formed on the support frame and having a rounded shape;
a receiving groove formed in the middle frame and supporting the rotational movement of the protruding guider; and
Reflective actuator, characterized in that it further comprises a second driving unit for moving the support frame in a second direction with respect to the middle frame. 7. The method of claim 6,
Reflective actuator, characterized in that it further comprises a second ball disposed between the protrusion guider and the receiving groove. According to claim 7, The second ball,
A reflectometer actuator, characterized in that it is made of a plurality of, spaced apart from each other with the protrusion guider interposed therebetween. The method of claim 6, wherein the protrusion guider,
It is formed on the rear surface of the support frame,
The reflector actuator, characterized in that the receiving groove is formed on the front surface of the middle frame. The method of claim 7, wherein the second driving unit,
a second magnet installed on the rear surface of the support frame and exposed to the rear through an open space formed on the rear surface of the middle frame; and
and a second coil installed on the base frame to be exposed in the direction of the second magnet through an open space formed in the base frame. 11. The method of claim 10,
The reflectometer actuator, which is installed on the rear surface of the base frame so that the middle frame and the base frame and between the support frame and the middle frame are in close contact at the same time, generates an attractive force to the second magnet, and further comprises a yoke. 12. A camera module comprising a reflectometer actuator as claimed in any one of claims 1 to 11.

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