KR20190134144A - Actuator for adjusting angle - Google Patents

Abstract

According to the present invention, an actuator for adjusting an angle comprises a rotating frame provided with a driving magnet and rotationally moving with the center part as a reference axis, an optical system mounted on the rotating frame, and a main frame provided with a driving coil facing the driving magnet and supporting the rotational movement of the rotating frame; and in this case, the driving coil is configured with a track shape which forms a loop, and includes a shape in which a distance between the tracks is increased toward an outer direction on the basis of the reference axis. Therefore, the present invention is capable of improving a driving performance and a precision.

Description

Actuator for angle adjustment {ACTUATOR FOR ADJUSTING ANGLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator for an optical system, and more particularly to an angle adjusting actuator to which a structure optimized for wide-area rotational movement of an optical system is applied.

With the development of hardware technology and changes in user environment, various and complex functions have been integrated in a mobile terminal (mobile terminal) in addition to the basic functions for communication.

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

In addition, recently, an optical system for changing the direction of light flowing into the lens and a post-angle angle of the optical system are equipped with a charged-coupled device (CCD), a complementary metal-oxide semiconductor (CMOS), and the like. By adjusting the position of the light flowing into the same image pickup device, a function of correcting camera shake in one or two directions has also been attempted.

Since image stabilization is a function of compensating for movement caused by shaking of a user's body, it can be said that it can be implemented only by a structure that can finely adjust the rotation angle of the optical system.

Meanwhile, in a method of generating a depth image or a panorama image, an optical image such as a reflectometer or a camera module is rotated and moved in the largest angular range to produce an extended image or a sharp depth image.

However, in the conventional apparatus for generating a panoramic image or the like, the structure or arrangement of a drive coil or the like optimized for rotating the optical system in a wide angle range is not accurately presented.

Furthermore, when applying the structure to finely adjust the angle of the optical system in the image stabilization as it is, there occurs an area in which the driving force by the electromagnetic force does not work correctly in the moving angle range or the electromagnetic force opposite to the same pole of the driving magnet The problem may arise that it is impossible to control the rotational movement of the optical system functionally.

In addition, when a sensor for detecting the rotational position of the optical system, such as a hall sensor, is applied for the feedback control, the image stabilization function may be implemented in a general arrangement since only a fine movement, that is, the position of the optical system within an extremely limited range is sensed.

However, when the sensor arrangement or structure used in the image stabilization is applied to the actuator that the optical system rotates widely in the extended angle range, it is difficult to accurately detect the position of the optical system, and also the position control of the optical system based thereon, There is a problem that it is difficult to be precisely implemented.

The present invention was devised to solve the above problems in the background as described above, even if the optical system rotates in an extended wide area, the driving force due to the electromagnetic force acts on the optical system that is accurately moving, as well as accurate and precise It is an object of the present invention to provide an actuator for angle adjustment in which position sensing and rotational movement control based thereon can be optimized.

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

Actuator for adjusting the angle of the present invention for achieving the above object is provided with a drive magnet, the rotation frame which rotates around the center portion of the reference axis; An optical system mounted on the rotating frame; And a driving coil facing the driving magnet, the main frame supporting the rotational movement of the rotating frame, in which case the driving coil is formed in a track shape forming a loop, the outer side of which is based on the reference axis. It is configured to include a shape in which the distance between the tracks increases in the direction.

The driving coil of the present invention may be configured to have a triangular shape having a point corresponding to the position of the reference axis and two points corresponding to the position of the outward corner of the edge of the drive magnet as a vertex and the drive The track connecting the two points of the coil is preferably configured to be located outside the outer circumference of the drive magnet.

In addition, the driving magnet of the present invention is preferably provided at a position biased outward with respect to the reference axis.

Furthermore, the angle adjusting actuator of the present invention may further include a sensor for detecting the position of the driving magnet, in which case the sensor is preferably provided at a position biased in the reference axis direction with respect to the driving magnet.

Preferably, the mainframe of the present invention may further include a yoke for generating an attraction force in the drive magnet, in this case, the yoke may be configured to have a shape larger than the size of the inner circumference.

In addition, the angle adjustment actuator of the present invention may further include a ball located between the rotation frame and the main frame.

Furthermore, at least one of the rotating frame and the main frame may be formed with guide rails in all or part of the circular region centered on the position of the reference axis, in which case the ball may be configured to be positioned in the guide rail.

Preferably, the guide rail is formed in an arc shape and may be formed in plurality in positions corresponding to each other with respect to the reference axis position.

According to an embodiment, the rotating frame of the present invention may further include a sub magnet provided at a position opposite to the driving magnet based on the position of the reference axis, in which case the main frame is located at a position facing the sub magnet. It is provided and may be configured to further include a sub yoke for generating an attraction force in the sub magnet.

In addition, the rotation frame of the present invention is the guide rail is formed, it is preferable that the guide rail is configured to be provided with a protrusion at the front or rear end to guide the accompanying movement of the ball during the rotational movement of the rotary frame.

Preferably, the angle adjusting actuator of the present invention may further include a lens module. In this case, the optical system of the present invention may be configured as a reflectometer for changing the path of the light so that incident light is directed to the lens module.

Actuator for angle adjustment according to another embodiment of the present invention is provided with a drive magnet, the rotation frame which rotates in the center of the reference axis; An optical system mounted on the rotating frame; A main coil having a driving coil facing the driving magnet and supporting a rotational movement of the rotating frame; And a hall sensor for sensing the position of the driving magnet by using the magnitude and direction of the magnetic force of the driving magnet, wherein the hall sensor is disposed to face the driving magnet, and the hole is rotated when the driving magnet is rotated. The area of the drive magnet facing the sensor is configured to be positioned so that it does not deviate from one magnetic pole center of the drive magnet to another magnetic pole center.

According to an exemplary embodiment of the present invention, even if the rotational movement range of the optical system is expanded, the driving force by the electromagnetic force can be precisely applied to the entire moving region, thereby further improving the driving performance and precision.

According to another preferred embodiment of the present invention, the Hall sensor is disposed so that the Hall sensor selectively detects only a section in which the magnetic force of the magnet provided in the optical system is linearly changed, so that even if the rotational movement range of the optical system is increased, The sensor can be used to detect the exact position of the optical system, and based on this, more precise control of the rotational movement of the optical system can be realized.

According to another preferred embodiment of the present invention, the main frame functioning as a stationary body in a face-to-face facing the rotating frame (mounting the optical system), which is a moving body, and the ball and the movement of the ball to face each other By arranging the guiding rail structure, not only the physical support of the rotating frame but also the rotational movement of the rotating frame can be more effectively realized.

The following drawings, which are attached to this specification, illustrate exemplary embodiments of the present invention, and together with the detailed description of the present invention, which serve to more effectively understand the technical spirit of the present invention, the present invention is described in these drawings. It should not be construed as limited to matters.
1 is a view showing the operating relationship of the actuator for angle adjustment according to an embodiment of the present invention,
2 is a view showing a detailed configuration of the angle adjustment actuator according to an embodiment of the present invention,
3 is a view illustrating a coupling relationship between the rotating frame and the main frame illustrated in FIG. 2 and respective detailed configurations thereof;
4 is a view showing the physical structure and arrangement of the drive coil and the drive magnet according to an embodiment of the present invention,
5 is a diagram showing an electromagnetic force relationship between a driving coil and a driving magnet of the present invention;
Figure 6 is a view showing a rotating frame and a guide rail provided in the rotating frame according to an embodiment of the present invention,
7 is a view showing a relationship between a hall sensor and a driving magnet according to an embodiment of the present invention;
8 is a diagram illustrating a yoke and a sub yoke according to an exemplary embodiment of the present invention.

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

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

1 is a view showing the operating relationship of the angle adjusting actuator (hereinafter referred to as 'actuator') 100 according to an embodiment of the present invention.

The actuator 100 of the present invention is an apparatus for generating or processing a variety of images, such as a panoramic image or a depth image, a 3D image, a plurality of images having binocular parallax and a viewing angle difference, and corresponds to an actuator for rotating the optical system 110. do.

As shown in FIG. 1, the optical system 110 of the present invention changes the light path of the subject P toward the camera module 50 or the image pickup device 53 provided with the lens module 55. ) Can be implemented.

The reflectometer 110 for changing the path of the light may be one selected from a mirror or a prism or a combination thereof, and may change the light flowing from the outside into the optical axis direction (the direction perpendicular to the lens module). It can be implemented in various members that can be made. The mirror or prism may be implemented with a glass material to improve optical performance.

In addition, according to the embodiment, the optical system 110 may be a camera module itself mounted with a lens or the like.

When the optical system 110 of the present invention is implemented as a reflecting system, as shown in FIG. 1, the light of the subject P is refracted or reflected through the reflecting system 110 of the present invention, so that the lens module 55 or the imaging device ( 53) flows into the side.

When the optical system 110 rotates in a counterclockwise direction with reference to FIG. 1, the light path of the subject P is changed to move in the θ1 direction, so that the image pickup device 53 has a distance d1 based on the center of the subject P. An image of the subject P shifted to the right is generated.

When the optical system 110 rotates in a clockwise direction from the corresponding point of view, the light path of the subject P also moves in the θ2 direction, so that the image pickup device 53 is shifted to the left by d2 with respect to the center of the subject P. An image of the subject P is generated.

Even in the case of the image stabilization function, the reflectometer 110 is configured to rotate. However, since the reflectometer 110 is rotated in a direction to compensate for the shake caused by the shaking of the user, the size of the rotational movement is extremely small. can do. However, the present invention has a feature that the rotational moving angle is much larger than the rotational angle implemented in the image stabilization because it is for generating a panoramic image.

Hereinafter, with reference to the accompanying drawings, it will be described in detail the detailed configuration and the specific operating relationship and the like for the actuator 100 of the present invention having a wide range of rotation angle.

2 is a view showing a detailed configuration of the actuator 100 in a preferred embodiment of the present invention, Figure 3 is a coupling relationship and each detail of the rotation frame 120 and the main frame 130 shown in FIG. It is a figure which shows a structure.

As shown in FIG. 2, the actuator 100 of the present invention may include an optical system 110, a rotation frame 120, and a main frame 130.

The rotating frame 120 is a configuration in which the optical system 110 is mounted as shown in FIG. 2 and the like, and a driving magnet 121 is provided so that driving force by electromagnetic force can be applied as described below.

In addition, the rotation frame 120 of the present invention corresponds to a moving body that is rotated relative to the reference axis set in the direction (X-axis direction) penetrating the center portion of the side with reference to Figure 2 as described in detail below.

When the optical system 110 mounted on the rotating frame 120 is a reflecting system, the path of the subject light Z1 introduced from the external system is changed (Z) through the reflecting system 110 to the lens module 55 (see FIG. 1). Flows into.

In the following description, the path of light flowing in the direction of the lens module 55 will be referred to as Z-axis, and the two directions perpendicular to the X-axis and Y-axis will be referred to.

2 is a view showing a change in the posture of the actuator 100 of the present invention shown in the upper right, the same actuator 100 as the actuator 100 shown in the upper right of FIG. As described with reference to 1, when the optical system 110 is rotated in the clockwise or counterclockwise direction, the path of the light Z1 in the direction of the subject P is also changed, and thus, toward the lens module 55. The path Z of incoming light is changed.

The main frame 130 of the present invention is a configuration for supporting the rotational movement of the rotating frame 120, and corresponds to a stationary body in terms of relative to the rotating frame 120 that is a rotating body moving.

The main frame 130 is provided with a driving coil 131 installed in a direction facing the driving magnet 121 provided in the rotating frame 120 to transmit the rotational driving force of the rotating frame 120.

The main frame 130 may be implemented in one piece, or may be dualized into a main frame 130 corresponding to a main body and a coupling frame 130-1 coupled to the main frame 130 in order to increase the efficiency of the assembly process. Of course.

As shown in FIG. 3, the ball 140 may be positioned between the rotation frame 120 and the main frame 130 of the present invention, and through the configuration of the ball 140, the main frame 130 of the present invention. And the rotating frame 120 can be maintained at a predetermined interval spaced state.

In addition, the rotating frame 120 of the present invention is the ZY plane (see FIG. 2) based on the main frame 130 with the friction force minimized by rolling and point-contact of the ball 140. Rotational movement in the direction can reduce noise, minimize driving force and improve driving precision.

In order to maintain the separation between the main frame 130 and the rotation frame 120 by an appropriate distance and to guide the rotational movement of the rotation frame 120 more effectively, as shown in FIG. Preferably, the guide rails 123 and 133 formed on at least one of the 120 and the main frame 130 are provided in a shape in which a predetermined portion is accommodated.

The guide rail formed on the rotating frame 120 is referred to as a first guide rail 123 and the guide rail formed on the main frame 130 is referred to as a second guide rail 133 to increase understanding convenience.

The yoke 150 provided in the main frame 130 is made of a metal material having magnetic properties, and generates mutual attraction with the driving magnet 121 provided in the rotating frame 120 to rotate the frame 120 or the main frame. Point-contact with the ball 140 of 130 is effectively maintained, and corresponds to the configuration such that the rotation frame 120 is not separated from the main frame 130 in the state.

The yoke 150 may be provided in the main frame 130 in a manner that is inserted into the injection process of the main frame 130, including a method of fitting into a space formed on one side of the main frame 130. .

As shown in FIG. 3, the front or rear ends of the first guide rails 123 formed in the rotating frame 120 of the present invention may be provided with protrusions 124 and 125 which may be formed in a stepped shape.

As such, since the protrusions 124 and 125 are provided at the front and / or rear ends of the first guide rails 123, when the rotating frame 120 rotates, the outside of the ball 140 may be easily prevented. Of course, the rotating frame 120 can be guided to move with the rotating frame 120, the ball 140 to move more than a suitable range, even if the rotating frame 120 is moved at a large angle by the ball 140 Physical support and contact can be effectively maintained.

4 is a view showing the physical structure and arrangement of the driving coil 131 and the driving magnet 121 according to an embodiment of the present invention, Figure 5 is between the driving coil 131 and the driving magnet 121 Is a diagram showing an electromagnetic force relationship and the like.

As described above, the rotation frame 120 of the present invention has an extended rotation angle range (in one embodiment, -35 degrees to +35 degrees) because it is much larger than the rotation angle by image stabilization. It is desirable to configure the transmission to be as effective as possible.

Therefore, as shown in FIG. 4 and the like, the driving magnet 121 provided in the rotating frame 120 is outwardly based on the reference axis C set at the center portion of the rotating frame 120 (downward relative to FIG. 4). It is preferable to be provided at a position deflected by.

As shown in FIG. 4A, the driving coil 131 of the main frame 130 is disposed in a direction facing the driving magnet 121 of the rotating frame 120.

When power of an appropriate size and direction is supplied to the driving coil 131 by an external control signal, an electromagnetic force corresponding thereto is generated, and the driving provided in the rotating frame 120, specifically, the rotating frame 120 by the generated electromagnetic force. The driving force is transmitted to the magnet 121 to rotate the rotation frame 120 to a predetermined position.

On the other hand, when the rotating frame 120 rotates based on the reference axis (C of FIG. 4), the angular displacement amount of the entire driving magnet 121 is the same, but the physical movement displacement of the corresponding point increases toward the outer circumference based on the reference axis. Done.

As described above, when the driving magnet 121 is provided at a position deflected outward with respect to the reference axis (C of FIG. 4) set at the center portion of the rotating frame 120, The difference in physical displacement becomes greater.

When the movement displacement of the driving magnet 121 is not large, the intended electromagnetic force may be transmitted to the driving magnet 121 even when the driving coil having a general shape (round or elliptical shape), a structure, or the like faces the driving magnet 121. .

However, when the movement displacement of the driving magnet 121 becomes wide as in the present invention, an area outside the electromagnetic force operating range of the driving coil having an elliptical shape or the like is generated so that the driving force of the driving coil is transmitted to the driving magnet 121. Incompatible or mutually opposite electromagnetic force may be simultaneously transmitted to the same pole (N pole or S pole) of the driving magnet 121, thereby making it impossible to control linear functions according to the size of the power applied to the driving coil. Will be.

In order to effectively solve this problem of the present invention, as shown in FIG. 4 and the like, the shape of the drive coil 131 is implemented as a track shape to form a loop, but the distance between tracks is increased toward the outer direction based on the reference axis. It may be implemented to have a larger shape, or to include a shape in which the distance between the tracks increases toward the outside with respect to the reference axis.

That is, as described above, the point near the reference axis of the driving magnet 121 is smaller in the displacement amount, and the distance from the reference axis is larger, that is, the greater the displacement amount of the point is in the outer circumferential direction. In order to correspond to the shape of the drive coil 131 is also configured to increase the overall shape toward the outer circumferential direction.

In addition, according to the embodiment, as illustrated in FIG. 4, the driving coil 131 is configured to have a triangular shape as a whole, but the point POINT 1 and the driving magnet 121 at a position corresponding to the reference axis C of FIG. 4. It can be configured to form a triangular shape with two points (POINT 2, POINT 3) corresponding to the position corresponding to the outer peripheral corner of the corner of the) as a vertex.

In this case, as shown in FIG. 4, the distance between tracks T1 and T2 at a position far from the reference axis is greater than the distance between tracks T1 and T2 close to the reference axis in the driving coil 131. It is configured to.

At this time, the internal angle A between the track portion T1 connecting POINT1 and POINT2 and the track portion T2 connecting POINT1 and POINT3 among the driving coils 131 is an optical system 110, that is, the optical system 110. It is preferable to configure an angle corresponding to the designed angle of the rotating frame 120 is mounted.

In addition, in order to solve the phenomenon that the electromagnetic force generated in the driving coil 131 is simultaneously transmitted to different poles (N pole, S pole) to reduce driving efficiency, a track connecting POINT 2 and POINT 3 as illustrated in FIG. 4. The portion T3 is preferably configured to be located outside the outer circumference of the driving magnet 121 to the extent possible.

As such, when the area near the reference axis of the driving coil 131 is configured to be narrow or small and the area far from the reference axis is configured to be wide or large, as shown in FIG. 5, the rotation frame 120, that is, the rotation frame 120. ), The S pole of the driving magnet 121 is moved to the T1 portion of the driving coil 131 even though the driving magnet 121 provided in FIG. 1 moves largely in the clockwise or counterclockwise direction ((b) or (c) of FIG. 5). The N pole of the driving magnet 121 can be configured to continue facing the T2 portion of the driving coil 131 so that the electromagnetic force of the driving coil 131 can be accurately applied over the entire area of the driving magnet 121. Can be configured to be delivered.

The drive coil 131 of the present invention may have various shapes including a triangular shape, a trapezoidal shape, and the like, as illustrated in FIG. Can be applied.

6 is a view illustrating a first guide rail 123 provided in the rotating frame 120 according to an exemplary embodiment of the present invention.

The first guide rail 123 of the present invention may be formed in a continuous groove shape and the center of the circle around the reference axis (C) that the rotating frame 120 rotates so that the rotational movement of the rotating frame 120 can be accurately induced. It is preferable to form in the circular whole area | region or partial area | region used as it. The radius of the circle (R of Figure 6) is preferably configured to be large in the range possible to effectively implement the physical support of the rotating frame 120.

According to the exemplary embodiment, a plurality of first guide rails 123 may be formed in the rotation frame 120 at positions that form an arc shape and correspond to or symmetric with respect to the reference axis C, as shown in the right figure of FIG. 6. Can be.

The second guide rail 133 corresponding to the first guide rail 123 and formed on the main frame 130 may also be configured like the first guide rail 123. In addition, according to the exemplary embodiment, the second guide rails 133 may be configured differently from some of the first guide rails 123 in the number provided. Also in this case, the radius of the circle formed by the second guide rail 133 is preferably configured to be the same as the radius of the circle formed by the first guide rail 123.

7 is a view showing a relationship between the Hall sensor 135 and the driving magnet 121 according to an embodiment of the present invention, Figure 7 (a) is the magnitude of the magnetic force for each position of the driving magnet 121 7 (b) and 7 (c) show a case in which the Hall sensor 135 is provided at a position deflected from the driving magnet 121 in a direction opposite to the reference axis C, and the reference axis C. FIG. When provided in a position deflected in the direction of ()) is a view showing a magnetic force detection range of the Hall sensor 135, respectively.

As shown in FIG. 7A, each magnetic pole (S pole and N pole) of the driving magnet 121 has the largest magnetic force in the center portion. The hall sensor 135 is configured to detect a change in the magnitude and direction of the magnetic force of the driving magnet 121 using a hall effect and output a signal according to the detected magnetic force.

The hall sensor 135 uses a magnetic force of the driving magnet 121 to output a signal corresponding to the position of the driving magnet 121, that is, the position of the rotation frame 120 provided with the driving magnet 121 (not shown). When transmitting to the drive driver to control the rotating frame 120 to move to the correct position by organically utilizing the signal transmitted from the Hall sensor 135 and the rotation control signal input from the user.

The driving driver may be implemented as an independent form of the hall sensor 135 or the like, or may be implemented as a single chip together with the hall sensor 135.

As such, the rotational movement of the rotation frame 120 means that the optical system 110 mounted on the rotation frame 120 is rotated. A plurality of images according to various angles are rotated by the rotational movement of the optical system 110. Can be created.

If the movement displacement of the moving body, specifically, the magnet (position sensing magnet) provided in the moving body is not large, such as the image stabilization, the position sensor can be sufficiently detected as long as the hall sensor 135 is installed at the magnetic pole boundary of the magnet.

However, when the rotation range of the moving body (rotation frame 120) as in the present invention is large, even if the Hall sensor 135 is installed in the magnetic pole boundary portion of the drive magnet 121 is installed in a position far from the axis of the rotation reference There may be a problem that cannot accurately sense the position of the driving magnet 121.

When the Hall sensor 135 is disposed at the magnetic pole boundary (the boundary between the S pole and the N pole) of the driving magnet 121, the Hall sensor 135 is disposed at the outer circumferential portion of the driving magnet 121 which is relatively far from the reference axis c. When the driving magnet 121 rotates as shown in FIG. 7B, the physical movement displacement of the driving magnet 121 is large, so that the Hall sensor 135 may have a center portion of each pole (S pole, N pole) of the driving magnet 121. Face both ends.

Therefore, in this case, since the hall sensor 135 senses the magnitude of the magnetic force according to the entire area of the north pole and the south pole as shown in the right figure of FIG. 7 (b), the position in the detection range S of the hall sensor 135 is different but the same. The area having the magnetic force value is included as it is.

When the area having the same magnetic force value is included as described above, even if the hall sensor 135 detects and outputs a specific magnetic force magnitude, a problem occurs in which the driving magnet 121, that is, the optical system 110 cannot be specified at which position. Done.

In order to solve this problem, the Hall sensor 135 of the present invention is configured to be provided at a position deflected in the reference axis direction with respect to the driving magnet 121, that is, a position close to the reference axis as shown in FIG. It is desirable to.

In such a configuration, as shown in the right diagram of FIG. 7C, only the section S in which the positive magnetic force and the negative magnetic force form a linearity can be used as the sensing area, and the magnitude of the magnetic force output from the hall sensor 135 is increased. By using the signal system according to the direction (negative and positive), the position of the driving magnet 121 can be precisely specified, and based on this, the rotational movement of the optical system 110 can be accurately and precisely controlled.

As shown in FIG. 7A, the driving magnet 121 typically has the largest magnetic force in the physical center of each magnetic pole (N pole and S pole), that is, physically in the center portion.

The hall sensor 135 senses the magnitude and direction (positive or negative) of the magnetic field in the region of the driving magnet 121 facing the self, and outputs a signal corresponding to the detected magnetic field characteristic. In the case of the present invention, the drive magnet 121 is rotated, whereas the hall sensor 135 is provided at a fixed position, so the area of the drive magnet 121 detected by the hall sensor 135 is also time-variable. do.

Therefore, if the Hall sensor 135 is disposed at a position biased toward the end of the driving magnet 121, as shown in FIG. 7 (b), since the movement displacement of the driving magnet 121 becomes relatively large, the Hall sensor Since the 135 faces the area beyond the center of each magnetic pole forming the driving magnet 121 as the driving magnet 121 rotates, the magnetic force function according to the time detected by the hall sensor 135 is shown in FIG. b) on the right.

In this case, as mentioned above, since a plurality of magnetic force values having the same magnitude and sign are sensed by the hall sensor 135, the position magnetism of the driving magnet 121 does not correspond one-to-one to the driving magnet 121. ) Position information cannot be specified.

On the contrary, when the Hall sensor 135 is disposed at a position deflected in the direction of the reference axis as shown in FIG. 7C, the displacement of the driving magnet 121 area that the Hall sensor 135 faces is relatively reduced. When the plurality of magnetic force values having the same magnitude and sign are detected by the hall sensor 135 as shown in the right figure of b), the hall sensor 135 detects the same as the right figure of FIG. The magnetic force value corresponds one-to-one with the position of the driving magnet 121.

Therefore, the rotational displacement of the driving magnet 121 is comprehensively considered using information on the size of the driving magnet 121, the rotation angle of the driving magnet 121, and the position of the hall sensor 135 is determined using these information. However, at the position where the area of the driving magnet 121 facing the hall sensor 135 does not deviate from one magnetic pole center of the driving magnet 121 to another magnetic pole center when the driving magnet 121 rotates. Preferably, the hall sensor 135 is disposed.

8 is a diagram illustrating the yoke 150 and the sub yoke 153 according to an exemplary embodiment of the present invention.

As described above, the yoke 150 of the present invention provided on the main frame 130 side generates an attractive force to the driving magnet 121 provided on the rotating frame 120, thereby rotating the frame 120 and the main frame 130. ) Can be maintained in contact with the ball 140 without being spaced or tilted.

In the yoke 150 of the present invention, as shown in FIG. 8 (a) in consideration of the moving range of the driving magnet 121, the length of the outer circumference L2 is longer than that of the length L1 of the inner circumference. The attraction force with the driving magnet 121 is effectively maintained in the entire moving range region of the 121.

In FIG. 8, the yoke 150 is exemplarily illustrated in a fan shape having an inner side cut out, but this is only one example, and the inner side of the yoke 150 may correspond to the moving range of the driving magnet 121. If the outer side is larger than that can be implemented in a variety of shapes, of course.

As described above, the driving magnet 121 is installed at a position deflected outward with respect to the reference axis C so as to be deflected outward with respect to the reference axis C and corresponding thereto. .

Therefore, in this case, the attraction force between the driving magnet 121 and the yoke 150 is biased in one direction so that the rotation frame 120 is inclined or the rotation frame 120 does not contact the ball 140. It may also deviate from.

 Therefore, as shown in FIG. 8 (b), the sub-magnet 127 is further provided at a position opposite to the driving magnet 121 with respect to the position of the reference axis C in the rotation frame 120 and correspondingly. The mainframe 130 may be configured to further include a sub yoke 153 that faces the sub magnet 127 and generates attraction force in the sub magnet 127.

In this case, since the attraction is distributed and balanced, both the main frame 130 and the rotating frame 120 can be in constant contact with the ball 140, as well as the rotation frame 120 when the rotation moves. It is possible to prevent the phenomenon of tilting at the source.

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

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

The accompanying drawings for the purpose of describing the present invention and the embodiments thereof may be shown in somewhat exaggerated form in order to emphasize or highlight the technical contents of the present invention. It should be understood that various forms of modification application may be possible at the level of ordinary skill in the art in consideration.

100: actuator according to the present invention
55 lens module
110: optical system 120: rotating frame
121: driving magnet 123: first guide rail
124, 125: protrusion 127: sub magnet
130: main frame 131: drive coil
133: second guide rail 135: Hall sensor
140: Ball 150: York
153: sub yoke

Claims (13)

A rotating magnet having a driving magnet and rotating around a central portion thereof;
An optical system mounted on the rotating frame; And
A driving coil facing the driving magnet is provided, and includes a main frame for supporting the rotational movement of the rotating frame,
Wherein the drive coil is made of a track shape to form a loop, the angle adjustment actuator, characterized in that it comprises a shape in which the distance between the tracks increases toward the outer direction based on the reference axis. The method of claim 1, wherein the drive coil,
Actuator for angle adjustment, characterized in that the point corresponding to the position of the reference axis and the corner of the drive magnet in the form of a triangle with two points corresponding to the position of the outer edge as a vertex. The method of claim 2,
Actuator for the angle adjustment, characterized in that the track connecting the two points of the drive coil is located in an outer direction than the outer circumference of the drive magnet. The method of claim 1, wherein the driving magnet,
Actuator for the angle adjustment, characterized in that provided in a position deflected outward with respect to the reference axis. The method of claim 4, wherein
Further comprising a sensor for detecting the position of the drive magnet,
And the sensor is provided at a position biased in the direction of the reference axis with respect to the driving magnet. The method of claim 1, wherein the mainframe,
Further comprising a yoke for generating an attraction force in the drive magnet,
The yoke has an angle adjusting actuator, characterized in that the size of the outer circumference than the size of the inner circumference. The method of claim 1,
Actuator for adjusting the angle further comprising a ball located between the rotation frame and the main frame. The method of claim 7, wherein at least one of the rotating frame and the main frame,
The guide rail is formed in all or part of the circular region centered on the position of the reference axis, the ball is positioned in the guide rail actuator for the angle adjustment. The method of claim 8, wherein the guide rail,
Actuator for the angle adjustment, characterized in that formed in the arc shape and a plurality of positions corresponding to each other with respect to the reference axis position. The method of claim 6, wherein the rotating frame,
Further comprising a sub-magnet provided at a position opposite to the driving magnet on the basis of the position of the reference axis,
The mainframe is provided at a position facing the sub-magnet, the actuator for angle adjustment, characterized in that it further comprises a sub yoke for generating an attraction force in the sub-magnet. The method of claim 8, wherein the rotating frame,
The guide rail is formed, the guide rail is an angle adjustment actuator, characterized in that the protrusion is provided at the front or rear end to guide the accompanying movement of the ball during the rotational movement of the rotary frame. The method of claim 1,
It further comprises a lens module,
The optical system,
Actuator for angle adjustment, characterized in that consisting of a reflectometer for changing the path of the light so that the incident light is directed to the lens module. A rotating magnet having a driving magnet and rotating around a central portion thereof;
An optical system mounted on the rotating frame;
A main coil having a driving coil facing the driving magnet and supporting a rotational movement of the rotating frame; And
Hall sensor for detecting the position of the drive magnet using the magnitude and direction of the magnetic force of the drive magnet,
The hall sensor is disposed to face the driving magnet, and is disposed at a position such that the area of the driving magnet facing the hall sensor does not deviate from one magnetic pole center of the driving magnet to another magnetic pole when the driving magnet rotates. Actuator for angle adjustment, characterized in that the.

Images