Lens driving apparatus, camera device and optical instrument including the same

Abstract

Implementations include a base, a coil holder disposed spaced apart from the base, a magnet disposed on the coil holder, a coil disposed on the base and configured to move the coil holder in an optical axis direction by interaction with the magnet, and a rolling member disposed between the coil holder and the base, wherein the rolling member includes an upper spherical member positioned between a first point that is a point that is 80 percent of a total length of the magnet in the optical axis direction from a lowermost end of the magnet and an uppermost end of the coil holder, a lower spherical member positioned between a second point that is a point that is 20 percent of the total length of the magnet from the lowermost end of the magnet and a lowermost end of the coil holder, and an intermediate spherical member disposed between the upper spherical member and the lower spherical member.

Description

Technical Field

[0001] The embodiments relate to a lens-mounted mobile device and a camera device and optical instrument including the lens-mounted mobile device. Background Technology

[0002] It is difficult to apply the technology of voice coil motors (VCMs) used in existing general camera modules to ultra-small, low-power camera modules, and therefore related research has been actively carried out.

[0003] The demand for and production of camera-equipped electronic products, such as smartphones and mobile phones, has increased. Cameras for mobile phones tend to have higher resolution and smaller size. Consequently, actuators have also been miniaturized, increased in diameter, and made more multifunctional. To achieve high-resolution cameras for mobile phones, it is necessary to improve the performance of cameras for mobile phones and their additional functions, such as autofocus, image stabilization, and zoom. Summary of the Invention

[0004] Technical issues

[0005] The embodiments provide a lens moving device capable of preventing the coil holder from tilting during autofocus operation and suppressing the separation of the magnet from the coil holder, as well as a camera device and optical instrument including the lens moving device.

[0006] Technical solution

[0007] The lens moving device according to an embodiment includes: a base; a coil frame disposed spaced apart from the base; a magnet disposed on the coil frame; a coil disposed on the base and configured to move the coil frame along an optical axis direction through interaction with the magnet; and a rolling member disposed between the coil frame and the base, wherein the rolling member includes: an upper spherical member disposed between a first point and the uppermost end of the coil frame; a lower spherical member disposed between a second point and the lowermost end of the coil frame; and an intermediate spherical member disposed between the upper and lower spherical members, wherein the first point corresponds to 80 percent of the total length of the magnet along the optical axis direction from the lowermost end of the magnet, and the second point corresponds to 20 percent of the total length of the magnet from the lowermost end of the magnet.

[0008] The upper spherical component can be positioned above the uppermost end of the magnet. The lower spherical component can be positioned below the lowermost end of the magnet.

[0009] Alternatively, at least a portion of the upper spherical member may overlap with the magnet in a direction perpendicular to the optical axis. Alternatively, at least a portion of the lower spherical member may overlap with the magnet in a direction perpendicular to the optical axis.

[0010] The magnet may include N and S poles facing each other in the optical axis direction and a boundary surface located between the N and S poles, and the intermediate spherical member may overlap with the boundary surface of the magnet in a direction perpendicular to the optical axis direction.

[0011] The coil holder may include a receiving groove in which a rolling member is disposed, and the receiving groove may include a plurality of grooves spaced apart from each other and corresponding to the upper spherical member, the middle spherical member and the lower spherical member respectively.

[0012] The magnet may include a first surface facing the coil, a second surface opposite to the first surface, a third surface connecting one side of the first surface to one side of the second surface, and a fourth surface connecting the other side of the first surface to the other side of the second surface, wherein the magnet includes a portion whose length decreases from the second surface toward the first surface in a direction parallel to the first surface, and the coil holder includes a seating portion configured to accommodate the magnet therein.

[0013] The lens moving device may include: a circuit board disposed on a base and electrically connected to a coil; and a magnetic yoke disposed on the base to face a magnet in a direction perpendicular to the optical axis and configured to exert an attractive force relative to the magnet.

[0014] The upper spherical member, the middle spherical member, and the lower spherical member can be disposed on the outer surface of the first side portion of the coil frame facing the coil. The upper spherical member can include a first spherical member positioned on one side of the magnet and a second spherical member disposed on the other side of the magnet. The middle spherical member can include a third spherical member disposed on one side of the magnet and a fourth spherical member disposed on the other side of the magnet. The lower spherical member can include a fifth spherical member disposed on one side of the magnet and a sixth spherical member disposed on the other side of the magnet.

[0015] The diameter of each of the third and fourth spherical members may be smaller than the diameter of each of the first, second, third, and fourth spherical members. Alternatively, the diameter of each of the first, fourth, and fifth spherical members may be smaller than the diameter of each of the second, third, and sixth spherical members.

[0016] Alternatively, the upper spherical member, the middle spherical member, and the lower spherical member may be disposed on the outer surface of the first side portion of the coil holder facing the coil, and the upper spherical member may include a first spherical member disposed on one side and the other side of the magnet, the middle spherical member may include a second spherical member disposed on the other side of the magnet, and the lower spherical member may include a third spherical member disposed on one side and the other side of the magnet.

[0017] According to another embodiment, a lens moving device may include: a base; a coil frame disposed spaced apart from the base; a magnet disposed on a first side portion of the coil frame; a coil disposed on the base and configured to move the coil frame along an optical axis by interaction with the magnet; a rolling member disposed between the first side portion of the coil frame and a first side portion of the base; and a magnetic yoke disposed on the first side portion of the base and configured to exert an attractive force relative to the magnet, wherein the rolling member includes an upper spherical member, a middle spherical member, and a lower spherical member spaced apart from each other in the optical axis direction, wherein the uppermost end of the upper spherical member may be positioned above the uppermost end of the magnet, wherein the lowermost end of the lower spherical member may be positioned below the lowermost end of the magnet, and wherein the middle spherical member may be positioned between the uppermost and lowermost ends of the magnet.

[0018] Each of the upper and lower spherical components may not overlap with the magnet in a direction perpendicular to the optical axis, while the middle spherical component may overlap with the magnet in a direction perpendicular to the optical axis.

[0019] Alternatively, at least a portion of the upper spherical member and at least a portion of the lower spherical member may overlap with the magnet in a direction perpendicular to the optical axis, and the middle spherical member may overlap with the magnet in a direction perpendicular to the optical axis.

[0020] Beneficial effects

[0021] According to the implementation method, since the coil frame is supported by an upper spherical member, a lower spherical member and an intermediate spherical member at its preset support point, the coil frame can be prevented from tilting during AF operation and the reliability of AF operation can be improved.

[0022] According to the embodiment, by connecting a magnet with an inclined side surface (or a chamfered surface) to the seated portion of the coil frame, the connection force between the magnet and the coil frame can be improved, and the magnet can be prevented from separating from the coil frame due to impact.

[0023] According to the implementation method, the amount of adhesive applied between the magnet and the seated portion of the coil frame can be reduced, and the material cost for the adhesive can be reduced. Attached Figure Description

[0024] Figure 1 This is a perspective view of a lens-mounted device according to an embodiment.

[0025] Figure 2 yes Figure 1 The image shown is an exploded perspective view of the lens-mounted device.

[0026] Figure 3 This is a perspective view of a lens-mounted device with the cover component removed.

[0027] Figure 4 It is a 3D diagram of the coil frame.

[0028] Figure 5 It is a three-dimensional view of the coil frame and the rolling components.

[0029] Figure 6 It is an exploded 3D view of the base, coil, circuit board, position sensor and magnetic yoke.

[0030] Figure 7 It is an exploded perspective view of the base, rolling components, circuit board, coil, and position sensor.

[0031] Figure 8 It is a top view of the coil frame, magnet, rolling components, and base.

[0032] Figure 9 It is along Figure 3 The cross-sectional view of the lens-equipped device is taken by line AB.

[0033] Figure 10 It is along Figure 3 A cross-sectional view of the lens-equipped mobile device taken from the line CD.

[0034] Figure 11 The illustration shows a rolling member mounted on a coil frame.

[0035] Figure 12a The illustration shows one embodiment of a rolling member mounted on a coil frame.

[0036] Figure 12b The illustration shows one embodiment of a rolling member mounted on a coil frame.

[0037] Figure 12c The illustration shows one embodiment of a rolling member mounted on a coil frame.

[0038] Figure 13 An exploded perspective view of a camera device according to an embodiment is shown.

[0039] Figure 14The illustration shows a perspective view of an optical instrument according to an embodiment.

[0040] Figure 15 The diagram shows Figure 14 The diagram shows the configuration of the optical instrument. Detailed Implementation

[0041] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0042] However, the technical spirit of this disclosure is not limited to the embodiments described herein and can be implemented in various different forms, and one or more components of the embodiments can be selectively combined or replaced within the technical spirit and scope of this disclosure.

[0043] Furthermore, unless otherwise expressly and specifically defined, the terms (including technical and scientific terms) used in the embodiments of this disclosure may be interpreted as having the meaning commonly understood by one of ordinary skill in the art to which this disclosure pertains, and commonly used terms, such as those defined in a dictionary, may be interpreted taking into account the contextual meaning of the relevant field.

[0044] Furthermore, the terminology used in the embodiments of this disclosure is for the purpose of describing embodiments and is not intended to limit this disclosure. In this specification, unless specifically stated in the context, singular forms may include plural forms, and the expression "at least one of A, B, or C" may include one or more of all possible combinations of A, B, and C.

[0045] Furthermore, when describing the constituent elements of embodiments of this disclosure, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended only to distinguish the corresponding constituent element from another constituent element, and do not limit the nature, order, or sequence of the corresponding constituent elements by such terms.

[0046] Furthermore, when a component is described as "connected," "linked," or "attached" to another component, the component may be directly connected, linked, or attached to the other component, or it may be connected, linked, or attached to the other component via another component disposed between them. Additionally, when a component is described as being formed or disposed "above" or "below" another component, this includes not only cases where the two components are in direct contact with each other, but also cases where one or more additional components are formed or disposed between the two components. Furthermore, the expression "above" or "below" can include not only an upward direction relative to a component, but also a downward direction.

[0047] In the following text, the lens moving device may be alternatively referred to as a lens drive unit, voice coil motor (VCM), actuator, or lens moving device; "coil" may be alternatively referred to as a coil unit; and "elastic member" may be alternatively referred to as an elastic unit or spring. Additionally, in the following description, "terminal" may be alternatively referred to as a pad, electrode, conductive layer, or bonding portion.

[0048] For ease of description, the lens-mounted device according to the embodiment will be described using a Cartesian coordinate system (x, y, z), but another coordinate system may also be used, and the embodiment is not limited to this. In each figure, the x-axis and y-axis may indicate a direction perpendicular to the optical axis (or z-axis) or a direction perpendicular to the optical axis direction. Furthermore, the z-axis direction, which is the direction of the optical axis OA, may be referred to as one of a "first direction," a "second direction," and a "third direction," the x-axis direction may be referred to as another of a "first direction," a "second direction," and a "third direction," and the y-axis direction may be referred to as the remaining one of a "first direction," a "second direction," and a "third direction." Additionally, the optical axis direction may be the direction of the optical axis or a direction parallel to the optical axis. The optical axis OA may be the optical axis of the lens barrel or the optical axis of a lens mounted on the lens barrel. Alternatively, for example, the optical axis OA may be an axis perpendicular to the imaging area of ​​the image sensor and passing through the center of the imaging area.

[0049] "Autofocus" refers to automatically forming a focused image of an object on the surface of an image sensor. A lens-mounted device according to an embodiment can perform an autofocus operation that moves an optical module (or lens module) including at least one lens along a first direction.

[0050] Figure 1 This is a perspective view of the lens moving device 100 according to the embodiment. Figure 2 yes Figure 1 Exploded perspective view of the lens-mounted mobile device 100. Figure 3 This is a perspective view of the lens moving device 100 with the cover member 300 removed. Figure 4 This is a 3D view of coil frame 110. Figure 5 This is a perspective view of the coil frame 100 and the rolling component 33. Figure 6 It is an exploded perspective view of the base 210, coil 120, circuit board 190, position sensor 170 and magnetic yoke 38. Figure 7 This is an exploded perspective view of the base 210, the rolling member 33, the circuit board 190, the coil 120, and the position sensor 170. Figure 8 This is a top view of the coil frame 110, magnet 130, rolling member 33 and base 210. Figure 9 It is along Figure 3 A cross-sectional view of the lens mobile device 100 taken by line AB. Figure 10 It is along Figure 3 A cross-sectional view of the lens mobile device 100 taken from the line CD. Figure 11 The figure shows a rolling member 33 mounted on the coil frame 110.

[0051] Reference Figures 1 to 11 The lens moving device 100 may include a coil holder 110, a magnet 130, a base 210, a coil 120, a yoke 38, and a rolling member 33. Additionally, the lens moving device 100 may include a position sensor 170 for AF feedback drive. Furthermore, the lens moving device 100 may include a circuit board 190 electrically connected to the position sensor 170 to supply drive signals to and receive the output of the position sensor 170. Additionally, the lens moving device 100 may include a cover member 300 for accommodating the base 210 therein.

[0052] The coil holder 110 can be disposed in the cover member 300. Lens module 400 (see...) Figure 13 The lens holder can be coupled to or mounted to the coil holder 110. At least a portion of the coil holder 110 can be disposed in the base 210. The coil holder 110 can be moved along the direction of the optical axis OA or a first direction (e.g., the Z-axis direction) for AF operation. The coil holder 110 can also be alternatively referred to as a "lens carrier" or "lens holder".

[0053] The coil holder 110 may have an opening 101 for mounting the lens module 400. For example, the opening 101 may be a hole or through-hole formed through the coil holder 110 along the optical axis. The coil holder 110 may have various shapes suitable for mounting the lens module 400. For example, the shape of the coil holder 110 may include at least one of a circular shape, an elliptical shape, or a polygonal shape.

[0054] The coil holder 110 may include at least one first stop 5A disposed on its upper surface. For example, the first stop 5A may have a structure that protrudes from the upper surface of the coil holder 110 along the optical axis or upward. The first stop 5A can prevent the upper surface of the coil holder 110 from directly colliding with the inner surface of the upper plate 301 of the cover member 300. In addition, the coil holder 110 may include at least one second stop (not shown) disposed on its lower surface.

[0055] The coil holder 110 may include multiple side portions. The coil holder 110 may include multiple side surfaces disposed between an upper surface and a lower surface of the coil holder. The coil holder 110 may include a mounting portion 112 for receiving a magnet 130. The coil holder 110 may include a mounting portion 112 formed or disposed on one of the multiple side portions (or side surfaces or outer surfaces). The mounting portion 112 may have a recessed shape. For example, the mounting portion 112 may be a recessed groove from the outer surface (or first side surface or first outer surface) of a first side portion of the coil holder 110. The mounting portion 112 may include a first opening for assembling or inserting the magnet 130. The magnet 130 may be inserted into the mounting portion 112 through the first opening and assembled with the coil holder 110. The first opening may be exposed through the upper surface of the coil holder 110. The mounting portion 112 may include a second opening facing the coil 120. The second opening may expose the first surface of the magnet 130 facing the coil 130.

[0056] The shape of the seating portion 112 may correspond to the shape of the magnet 130. The seating portion 112 may include a bottom surface 112A and at least one side surface 112B. The bottom surface 112A may have a height difference in the optical axis direction relative to the upper surface of the coil holder 110. The bottom surface 112A may be positioned below the upper surface of the coil holder 110 and above the lower surface of the coil holder 110. For example, the side surface 112B of the seating portion 112 may include a first side surface 112B1 facing the first surface of the magnet 130, a second side surface 112B2 connected to one side of the first side surface 112B1, and a third side surface 112B3 connected to the other side of the first side surface 112B1. The second side surface 112B2 and the third side surface 112B3 may be positioned relative to each other based on the magnet 130. The second surface of the magnet 130 may be the surface opposite to the first surface of the magnet 130.

[0057] Each of the second side surface 112B2 and the third side surface 112B3 of the seating portion 112 may be a surface inclined relative to the first side surface 112B1. In another embodiment, each of the second side surface 112B2 and the third side surface 112B3 may also be alternatively referred to as a “wall” or “sidewall”.

[0058] For example, the interior angle between the first side surface 112B1 and the second side surface 112B2 can be an acute angle. Similarly, the interior angle between the first side surface 112B1 and the third side surface 112B3 can be an acute angle. The second side surface 112B2 and the third side surface 112B3 of the seating portion 112 can be chamfered surfaces. Therefore, separation of the magnet 130 from the seating portion 112 of the coil holder 110 can be prevented or suppressed. Furthermore, the chamfered surfaces of the seating portion 112 of the coil holder 110 can serve as assembly position guides when the magnet 130 is attached to the coil holder 110, thereby facilitating assembly. The seating portion 112 can also be alternatively referred to as a "recess." For example, the shape of the seating portion 112 viewed from above can be trapezoidal. Therefore, separation of the magnet 130 from the seating portion 112 of the coil holder 110 can be prevented or suppressed, and a small amount of adhesive (e.g., epoxy resin) can be used to attach the magnet 130 to the seating portion 112. Additionally, the seating portion 112 may be provided with grooves 6 for uniformly distributing the adhesive within the seating portion 112. The grooves 6 may include a first groove 6A formed in the side surface 112B of the seating portion 112 and a second groove 6B formed in the bottom surface 112A of the seating portion 112.

[0059] The coil holder 110 may include at least one receiving groove 17, in which the rolling member 33 is disposed or received. The receiving groove 17 may also be alternatively referred to as a "groove," "guide portion," or "guide groove." At least a portion of the rolling member 33 may contact the receiving groove 17.

[0060] A receiving groove 17 may be formed in a side portion of the coil holder 110. The receiving groove 17 may be formed in the side portion 110A of the coil holder 110 facing the coil 120. The receiving groove 17 may be recessed from the outer surface of the side portion 110A of the coil holder 110. The receiving groove 17 may include a plurality of grooves spaced apart from each other. The number of receiving grooves 17 may be equal to the number of spherical members. For example, the receiving groove 17 may include a plurality of grooves 7A to 7F corresponding to the upper spherical member, the middle spherical member, and the lower spherical member, respectively.

[0061] For example, the receiving groove 17 may include a plurality of first grooves 7A to 7C located on one side of the magnet 130 and a plurality of second grooves 7D to 7F located on the other side of the magnet 130.

[0062] The plurality of first grooves 7A to 7C may be spaced apart from each other in the optical axis direction, and may be arranged or aligned in a row in the optical axis direction. The plurality of second grooves 7D to 7F may be spaced apart from each other in the optical axis direction, and may be arranged or aligned in a row in the optical axis direction.

[0063] exist Figure 4In one embodiment, the number of first grooves is three, and the number of second grooves is three. However, in another embodiment, the number of each of the first and second grooves can be two, four, or more.

[0064] Magnet 130 can be disposed on coil holder 110. Magnet 130 can be connected to coil holder 110. Magnet 130 can be disposed on or connected to a side portion 110A of coil holder 110. Magnet 130 can be disposed between the side portion 110A of coil holder 110 and the side plate 302 of cover member 300. Magnet 130 can be disposed in the sitting portion 112 of coil holder 110.

[0065] The magnet 130 may have a shape corresponding to the outer surface of one side portion 110A of the coil holder 110. The magnet 130 may have a polyhedral shape (e.g., a hexahedral shape), but is not limited thereto. See reference... Figure 2 The magnet 130 may include a first surface 8A facing the coil 120, a second surface 8B opposite to the first surface 8A, a third surface 8C connecting one side of the first surface 8A and one side of the second surface 8B, and a fourth surface 8D connecting the other side of the first surface 8A to the other side of the second surface 8B. The interior angle between the first surface 8A and the third surface 8C may be obtuse, and the interior angle between the first surface 8A and the fourth surface 8D may also be obtuse. Conversely, the interior angle between the second surface 8B and the third surface 8C may be acute, and the interior angle between the second surface 8B and the fourth surface 8D may also be acute. The area of ​​the first surface 8A may be smaller than the area of ​​the second surface 8B. In another embodiment, the area of ​​the first surface of the magnet 130 may be equal to the area of ​​the second surface of the magnet 130.

[0066] The magnet 130 may include a portion in which the lateral length W decreases from the second surface 8B toward the first surface 8A. Here, the lateral direction of the magnet 130 may be parallel to the first surface 8A or the second surface 8B (e.g., the Y-axis direction). In another embodiment, the lateral length of the magnet 130 may be constant or uniform. That is, in another embodiment, the interior angle formed between the first (or second) surface and the third (or fourth) surface of the magnet 130 may be a right angle. Here, the seating portion 112 may also have a shape corresponding to the shape of the magnet 130 according to another embodiment.

[0067] Magnet 130 can be a unipolar magnetized magnet or a bipolar magnet having two distinct polarities (e.g., N pole and S pole) and a boundary surface naturally formed between the different polarities. Magnet 130 can be a bipolar magnet divided into N pole and S pole in the optical axis direction. For example, the N pole and S pole of magnet 130 may face each other in the optical axis direction.

[0068] In another embodiment, the magnet 130 may be a bipolar magnet that is divided into N poles and S poles in a direction perpendicular to the optical axis.

[0069] In another embodiment, to enhance the electromagnetic force, the magnet 130 may be a quadrupole magnet or a bipolar magnetized magnet comprising two N poles and two S poles. For example, the magnet 130 may include a first magnet portion comprising N and S poles, a second magnet portion comprising S and N poles, and a partition wall disposed between the first and second magnet portions. Here, the partition wall may include substantially non-magnetic portions and segments with low polarity, and may be filled with air or formed of a non-magnetic material. The partition wall may also be referred to as a "neutral region." For example, the first and second magnet portions may face each other in the optical axis direction, and may be configured such that different polarities face each other in the optical axis direction. In another embodiment, for example, the first and second magnet portions may face each other in a direction perpendicular to the optical axis direction, and may be configured such that different polarities face each other in a direction perpendicular to the optical axis direction.

[0070] The base 210 may be at least partially disposed within the cover member 300. The base 210 may house at least a portion of the coil holder 110. The base 210 may support at least one of the coil 120, circuit board 190, or magnetic yoke 38. The base 210 may house an AF moving unit (or movable unit) such that the AF moving unit (e.g., coil holder 110) is movable along the optical axis. The base 210 may also be alternatively referred to as a “housing” or “shell.” For example, the AF moving unit may include the coil holder 110 and components coupled to or mounted to the coil holder 110. For example, the AF moving unit may include the coil holder 110 and magnet 130. Alternatively, the AF moving unit may include a lens module 400 coupled to or mounted to the coil holder 110.

[0071] The base 210 may include a cavity 22 for receiving the coil holder 110. The base 210 may include an opening 201 configured to expose at least a portion of the coil holder 110 (or lens module 400). The opening 201 may also be alternatively referred to as a “hole” or a “hollow portion.” The opening 201 may be located at the center or central region of the base 210. For example, the opening 201 may have the form of a through-hole formed in the base 210 along the optical axis. The opening 201 may have a shape corresponding to the shape of the coil holder 110, such as a circular (or elliptical) shape or a polygonal shape (e.g., a quadrilateral or octagonal shape).

[0072] The base 210 may include multiple side portions corresponding to multiple side portions of the coil holder 110. The side portions of the base 210 may correspond to the side plates of the cover member 300. For example, the base 210 may include a first side portion 42 corresponding to a first side portion 110A of the coil holder 110.

[0073] The base 210 may include a seating portion 141 in which the coil 120 is disposed. The seating portion 141 may be formed on a first side portion 42 of the base 210. The seating portion 141 may be an opening, a hole, or a through hole. In another embodiment, the seating portion of the base 210 may be in the form of a groove or recess. In another embodiment, the base 210 may not include the seating portion 141.

[0074] The base 210 may include a recess 48 in which the circuit board 190 is disposed. The recess 48 may have a shape that is recessed from the outer surface of the first side portion 42 of the base 210. In another embodiment, the base 210 may not include the recess 48.

[0075] Reference Figure 7 The base 210 may include a guide portion 49, in which at least a portion of the rolling member 33 is disposed. The receiving groove 17 of the coil holder 110 may face or overlap with the guide portion 49 of the base 210 in a second direction (e.g., the X-axis direction). The rolling member 33 may be disposed between the receiving groove 17 of the coil holder 110 and the guide portion 49 of the base 210.

[0076] The guide portion 49 may include a first guide portion 49A corresponding to, facing, or overlapping with, the grooves 7A to 7C of the coil holder 110, and a second guide portion 49B corresponding to, facing, or overlapping with the grooves 7A to 7C of the coil holder 110. The first guide portion 49A may be positioned on one side of the coil 120, and the second guide portion 49B may be positioned on the other side of the coil 120. The guide portion 49 may be a groove. The guide portion 49 may be a groove recessed from the inner surface of the first side portion 42 of the base 210. The guide portion 49 may extend along the optical axis.

[0077] In another embodiment, Figure 7 The first guide portion 49A and the second guide portion 49B can be formed on the outer surface of the first side portion 110A of the coil frame 110, and Figure 4 Multiple grooves 7A to 7F can be formed in the inner surface of the first side portion 42 of the base 210.

[0078] The coil 120 can be configured to correspond to, face, or overlap with the magnet 130 in a direction perpendicular to the optical axis (e.g., a second direction (X-axis direction)). The coil 120 can be disposed on the base 210. The coil 120 can be disposed on the first side portion 42 of the base 210. For example, the coil 120 can be disposed in the seating portion 141 of the base 210.

[0079] A drive signal (e.g., drive current or voltage) may be supplied or applied to coil 120. Here, the drive signal may be a DC signal. However, in another embodiment, the drive signal may be an AC signal, or the drive signal may include both DC and AC signals. Coil 120 may be a drive AF (autofocus) coil that electromagnetically interacts with a magnet 130 disposed on coil holder 110.

[0080] The AF moving unit (or movable unit) can move along a first direction by means of the interaction between coil 120 and magnet 130. For example, coil holder 110 can move in an upward direction (+Z-axis direction) or a downward direction (-Z-axis direction). By controlling the strength and / or polarity (e.g., the direction of current flow) of the drive signal applied to coil 120, the strength and / or direction of the electromagnetic force generated by the interaction between coil 120 and magnet 130 can be controlled, thereby controlling the movement of the AF moving unit in the first direction and thus performing autofocus.

[0081] Coil 120 may have a closed-loop shape. Coil 120 may have an annular shape with a hole, a central hole, or a hollow portion. For example, coil 120 may be in the form of a coil loop wound clockwise or counterclockwise around an axis perpendicular to the optical axis and parallel to a second direction (e.g., the X-axis direction).

[0082] Coil 120 can be disposed on or mounted on circuit board 190. Coil 120 can be connected to circuit board 190. Coil 120 can be disposed on a first surface of circuit board 190. Here, the first surface of circuit board 190 can be the surface facing the magnet 130 or the outer surface of the first side portion 42 of base 210. Coil 120 can be disposed facing magnet 130 in a direction perpendicular to the optical axis (e.g., a second direction).

[0083] The coil 120 can be electrically connected to the circuit board 190. For example, the coil 120 can be electrically connected to the pads (not shown) of the circuit board 190 via solder or conductive adhesive.

[0084] The circuit board 190 may be disposed on the base 210. The circuit board 190 may be coupled to the base 210. For example, the circuit board 190 may be disposed on or coupled to the first side portion 42 of the base 210.

[0085] The base 210 may include a mounting portion 48 in which the circuit board 190 is disposed or mounted. For example, the mounting portion 48 may be a recessed groove from the outer surface of a first side portion 42 of the base 210. The circuit board 190 may be a printed circuit board or an FPCB. The circuit board 190 may be attached to the mounting portion 48 of the base 210 via adhesive. A guide groove 41A configured to uniformly distribute adhesive may be formed in the mounting portion 48 of the base 210. For example, the guide groove 41A may be formed in the bottom surface of the mounting portion 48 of the base 210.

[0086] The circuit board 190 may include a terminal portion 21 configured for electrical connection to an external device or external equipment. The terminal portion 21 may include a plurality of terminals P1 to P4. Although in Figure 2 The number of terminals is four, but in another embodiment, the number of terminals may be two or more. Multiple terminals P1 to P4 may be disposed on the second surface of the circuit board 190. The second surface of the circuit board 190 may be the surface opposite to the first surface of the circuit board 190. Terminal portions 21 may be disposed on the lower portion of the second surface of the circuit board 190 and may be exposed through the side plate 302 of the cover member 300. The circuit board 190 may include circuit patterns or wiring configured to electrically connect the position sensor 170 and the terminals P1 to P4 of the terminal portions 21 to each other.

[0087] Position sensor 170 may be disposed on base 210. Position sensor 170 may be disposed on a first side portion 42 of base 210. Position sensor 170 may be disposed in a seating portion 141 of base 210. Position sensor 170 may be electrically connected to circuit board 190. Position sensor 170 may be disposed on circuit board 190. Position sensor 170 may be electrically connected to circuit board 190 via solder or conductive adhesive. Position sensor 170 may be disposed on or mounted on a first surface of circuit board 190.

[0088] Position sensor 170 may face magnet 130 in a direction perpendicular to the optical axis, for example, in a second direction. At least a portion of position sensor 170 may overlap with magnet 130 in the second direction (e.g., the X-axis direction). Alternatively, position sensor 170 may face or overlap with yoke 38 in the second direction (e.g., the X-axis direction). In another embodiment, position sensor 170 may not face yoke 38 in a direction perpendicular to the optical axis, or may not overlap with yoke 38 in a direction perpendicular to the optical axis. Position sensor 170 may be disposed in the central hole of coil 120. In another embodiment, position sensor 170 may be disposed outside the central hole of coil 120.

[0089] Position sensor 170 can detect the position or displacement of coil holder 110 in the optical axis direction. Position sensor 170 can detect the magnetic field strength of magnet 130. Position sensor 170 can output an output signal corresponding to the detection result of the magnetic field strength of magnet 130. The controller of camera device 200 or the controller 780 of optical instrument 200A can use the output signal of position sensor 170 to detect or sense the displacement of coil holder 110 in the optical axis direction.

[0090] The position sensor 170 can be implemented as a driver IC including a Hall sensor. When the position sensor 170 is in the form of a driver IC including a Hall sensor, the position sensor 170 may include first to fourth terminals configured to transmit and receive data to and from an external device using protocol-based data communication, such as I2C communication, and fifth and sixth terminals configured to supply drive signals to the coil 120. Here, the first and second terminals of the position sensor 170 may be terminals configured to receive electrical signals, the third terminal of the position sensor 170 may be a terminal configured to transmit and receive clock signals, and the fourth terminal may be a terminal configured to transmit and receive data signals. Each of the terminals P1 to P4 of the circuit board 190 can be electrically connected to a corresponding one of the first to fourth terminals of the position sensor 170. In addition, the fifth and sixth terminals of the position sensor 170 can be electrically connected to the coil 120 through the circuit board 190, and the position sensor 170 can supply drive signals to the coil 120.

[0091] In another embodiment, the position sensor 170 may be implemented as a Hall sensor on its own. When the position sensor 170 is implemented as a Hall sensor on its own, the position sensor 170 may include two input terminals supplied with drive signals or power and two output terminals configured to output output signals. Additionally, two terminals P1 and P2 of the circuit board 190 may be electrically connected to the two input terminals of the position sensor 170 and may supply power or drive signals to the two input terminals of the position sensor 170. Furthermore, two other terminals P3 and P4 of the circuit board 190 may be electrically connected to the two output terminals of the position sensor 170 and may receive the output signals of the position sensor 170. Additionally, the circuit board 190 may also include two additional terminals (not shown) electrically connected to the coil 120 to supply drive signals to the coil 120.

[0092] A magnetic yoke 38 may be disposed on the base 210. The magnetic yoke 38 may be disposed on the first side portion 42 of the base 210. The magnetic yoke 38 may be disposed on the base 210 such that it corresponds to or faces the magnet 130 in a direction perpendicular to the optical axis (e.g., the X-axis direction). The magnetic yoke 38 may be coupled to or attached to the circuit board 190. The magnetic yoke 38 may be disposed on or coupled to the second surface of the circuit board 190.

[0093] At least a portion of the yoke 38 may overlap with the magnet 130 in a direction perpendicular to the optical axis, for example, in a second direction. An attractive force may act between the yoke 38 and the magnet 130. For example, the attractive force may act between the yoke 38 and the magnet 130 in a direction perpendicular to the optical axis, for example, in a second direction. A magnetic circuit may be formed between the yoke 38 and the magnet 130. The yoke 38 may be formed of a material that can be attracted by a magnet. For example, the yoke 38 may be a magnetic material or a magnetic component. For example, the yoke 38 may be formed of a metallic material that can be attracted by a magnet. Alternatively, for example, the yoke 38 may be formed of a magnetic metallic material. Alternatively, for example, the yoke 38 may be a magnet.

[0094] Since the yoke 38 is mounted on the base 210, which serves as a fixing unit, the coil frame 110, connected to the magnet 130, can be attracted toward the yoke 38 by means of the attractive force acting between the yoke 38 and the magnet 130. The rolling member 33 can be pressed by the coil frame 110 and the base 210 by means of the interaction between the yoke 38 and the magnet 130. The yoke 38 and the magnet 130 can be referred to as "pressing units" or "pressing members". When the coil frame 110 moves along the optical axis via the pressing units, the contact between the coil frame 110 and the rolling member 33, as well as the contact between the base 210 and the rolling member 33, can be maintained. The attractive force acting between the yoke 38 and the magnet 130 can also be referred to as a holding force for holding the coil frame 110 in a supported state.

[0095] A rolling member 33 may be disposed between the coil holder 110 and the base 210. The rolling member 33 may also be alternatively referred to as a "spherical member," "ball bearing," or "ball joint." The rolling member 33 may contact both the coil holder 110 and the base 210. The rolling member 33 may perform rolling or sliding motion between the coil holder 110 and the base 210. The rolling member 33 may support the movement of the coil holder 110 in the optical axis direction. The rolling member 33 may reduce friction between the coil holder 110 and the base 210 when the coil holder 110 moves along the optical axis direction. The coil holder 110 may contact the rolling member 33 and may slide along the optical axis direction by means of the rolling member 33.

[0096] The rolling member 33 may be formed of a metal, plastic, ceramic or resin material, but is not limited thereto. The rolling member 33 may have a circular shape and may have a diameter sufficient to support the movement of the coil frame 110 in the optical axis direction.

[0097] The rolling member 33 can be disposed between the outer surface of the coil holder 110 and the inner surface of the base 210. The rolling member 33 can contact the outer surface of the first side portion 110A of the coil holder 110 and the inner surface of the first side portion 42 of the base 210. The rolling member 33 may include spherical members B1 to B6 disposed between the first side portion 110A of the coil holder 110 and the first side portion 42 of the base 210.

[0098] At least a portion of the rolling member 33 may be disposed in the receiving groove 17 of the coil holder 110. For example, the rolling member 33 may be disposed between the receiving groove 17 of the coil holder 110 and the guide portion 49 of the base 210.

[0099] Reference Figure 7 , Figure 10 and Figure 11 The rolling member 33 may include an upper spherical member, a lower spherical member positioned below the upper spherical member, and an intermediate spherical member disposed between the upper and lower spherical members. The upper spherical member, the intermediate spherical member, and the lower spherical member may be spaced apart from each other in the optical axis direction.

[0100] The upper spherical member may be positioned higher than the lower spherical member in the optical axis direction. Each of the upper spherical member, the intermediate spherical member, and the lower spherical member may include at least one spherical member (or at least one spherical component). For example, each of the upper spherical member, the lower spherical member, and the intermediate spherical member may include two or more spherical members.

[0101] For example, the upper spherical member may include a spherical member B1 positioned on one side of the magnet 130 and a spherical member B4 positioned on the other side of the magnet 130. The middle spherical member may include a spherical member B2 positioned on one side of the magnet 130 and a spherical member B5 positioned on the other side of the magnet 130. The lower spherical member may include a spherical member B3 positioned on one side of the magnet 130 and a spherical member B6 positioned on the other side of the magnet 130.

[0102] The diameters of the spherical members in the upper, lower, and intermediate spherical members may be equal to each other. In another embodiment, the diameter of at least one of the upper, lower, or intermediate spherical members may be different from the diameters of the other spherical members.

[0103] The spherical members of the upper spherical member (e.g., B1 and B4) can be arranged in a row or aligned with each other in a direction perpendicular to the optical axis (e.g., in the third direction). The spherical members of the middle spherical member (e.g., B2 and B5) can be arranged in a row or aligned with each other in a direction perpendicular to the optical axis (e.g., in the third direction). The spherical members of the lower spherical member (e.g., B3 and B6) can be arranged in a row or aligned with each other in a direction perpendicular to the optical axis (e.g., in the third direction).

[0104] In another embodiment, the rolling member may not include one of the upper spherical member and the lower spherical member.

[0105] The rolling member 33 may include first spherical members B1 to B3 disposed on one side of the magnet 130 and second spherical members B4 to B6 disposed on the other side of the magnet 130. The first spherical members B1 to B3 may be spaced apart from each other or aligned with each other in the optical axis direction. The second spherical members B4 to B6 may be spaced apart from each other or aligned with each other in the optical axis direction. Although in Figure 5 The number of the first spherical member (or the second spherical member) is three, but in another embodiment the number of the first spherical member (or the second spherical member) may be two or four or more.

[0106] Despite Figure 7 The intermediate rolling member 33 includes six spherical members B1 to B6, but the number of spherical members is not limited to this, and in another embodiment, the rolling member 33 may include two to five spherical members or seven or more spherical members. According to the embodiment, by providing upper spherical members (e.g., B1 and B4), lower spherical members (B3 and B6), and intermediate spherical members (B2 and B5), the coil frame 110 can be stably supported during AF operation, and tilting of the coil frame 110 can be prevented or suppressed. Therefore, the embodiment can ensure the accuracy and reliability of AF operation.

[0107] By means of the attraction force acting between the yoke 38 and the magnet 130, the rolling member 33 can be pressed by the coil frame 110 and / or the base 210 and can stably support the coil frame 110.

[0108] Reference Figure 10 and Figure 11To reliably ensure the effect of preventing the coil holder 110 from tilting, the upper spherical members (e.g., B1 and B4) can be positioned between the uppermost end of the coil holder 110 and the first point P11. For example, the uppermost end of the coil holder 110 can be the upper surface of the coil holder 110 or the uppermost end of the first side portion 110A of the coil holder 110. For example, the lowermost ends 11A and 11B of the upper spherical members (e.g., B1 and B4) can be positioned above or at the same height as the first point P11.

[0109] The first point P11 can be a point corresponding to 80 percent of the total length H1 of the magnet 130 along the optical axis, starting from the lowest end of the magnet 130. Alternatively, the first point P11 can be a point located at a distance above the lowest end of the magnet 130 that corresponds to 80 percent of the total length H1 of the magnet 130 along the optical axis.

[0110] Additionally, to reliably ensure the effect of preventing the coil holder 110 from tilting, the lower spherical members (e.g., B3 and B6) can be positioned between the lowermost end of the coil holder 110 and the second point P12. For example, the lowermost end of the coil holder 110 can be the lower surface of the coil holder 110 or the lowermost end of the first side portion 110A of the coil holder 110. For example, the uppermost ends 11C and 11D of the lower spherical members (e.g., B3 and B6) can be positioned below or at the same height as the second point P12.

[0111] The second point P12 can be a point corresponding to 20 percent of the total length H1 of the magnet 130 from its lowest end. Alternatively, the second point P12 can be a point located at a distance from the lowest end of the magnet 130 that corresponds to 20 percent of the total length H1 of the magnet 130 in the optical axis direction.

[0112] When the lowermost ends 11A and 11B of the upper spherical members (e.g., B1 and B4) are positioned below the first point P11, the distance between the upper spherical members (e.g., B1 and B4) and the intermediate spherical members (e.g., B2 and B5) is excessively reduced, so that the coil frame 110 may not be stably supported during AF operation, and therefore the effect of preventing the coil frame 110 from tilting may be insignificant. Furthermore, when the uppermost ends 11C and 11D of the lower spherical members (e.g., B3 and B6) are positioned above the second point P1, the distance between the lower spherical members (e.g., B3 and B6) and the intermediate spherical members (e.g., B2 and B5) is excessively reduced, so that the coil frame 110 may not be stably supported during AF operation, and therefore the effect of preventing the coil frame 110 from tilting may be insignificant.

[0113] For example, the uppermost end of the upper spherical member (e.g., B1 and B4) can be positioned above the uppermost end of the magnet 130. The lowermost end of the lower spherical member (e.g., B3 and B6) can be positioned below the lowermost end of the magnet 130. The intermediate spherical members (e.g., B2 and B5) can be positioned between the uppermost and lowermost ends of the magnet 130.

[0114] Alternatively, for example, the upper spherical members (e.g., B1 and B4) may be positioned above the uppermost end or upper surface of the magnet 130. The lower spherical members (e.g., B3 and B6) may be positioned below the lowermost end or lower surface of the magnet 130. For example, the lowermost ends 11A and 11B of the upper spherical members (e.g., B1 and B4) may be positioned above the upper surface or uppermost end of the magnet 130 in the optical axis direction. The lowermost ends 11A and 11B of the lower spherical members (e.g., B3 and B6) may be positioned below the lower surface or lowermost end of the magnet 130 in the optical axis direction. Intermediate spherical members (e.g., B2 and B5) may be positioned between the upper spherical members (e.g., B1 and B4) and the lower spherical members (e.g., B3 and B6).

[0115] Rolling member 33 may not overlap with magnet 130 in the optical axis direction. Upper spherical members B1 and B4 may not overlap with magnet 130 in a direction perpendicular to the optical axis (e.g., in the third direction (Y-axis direction)). Lower spherical members B3 and B6 may not overlap with magnet 130 in a direction perpendicular to the optical axis (e.g., in the third direction (Y-axis direction)). At least a portion of intermediate spherical members B2 and B5 may overlap with magnet 130 in a direction perpendicular to the optical axis (e.g., in the third direction (Y-axis direction)). Intermediate spherical members (e.g., B2 and B5) may be configured to overlap with the middle portion of magnet 130. For example, intermediate spherical members (e.g., B2 and B5) may be configured to overlap with the middle portion of magnet 130 in the third direction (Y-axis direction). For example, the intermediate spherical members (e.g., B2 and B5) can be configured to overlap with the boundary surface (or partition wall) between the N and S poles of the magnet 130 in a direction perpendicular to the optical axis (e.g., in the Y-axis direction).

[0116] In another embodiment, at least a portion of the upper spherical members (e.g., B1 and B4) may overlap with the magnet 130 in a direction perpendicular to the optical axis (e.g., in the third direction). For example, at least a portion of the upper spherical members (e.g., B1 and B4) may overlap with one of the two poles (e.g., the N pole and the S pole) of the magnet 130 in a direction perpendicular to the optical axis (e.g., in the third direction). For example, at least a portion of the upper spherical members (e.g., B1 and B4) may overlap with a first portion of the magnet 130 in a direction perpendicular to the optical axis. Here, the first portion of the magnet 130 may be the region between the uppermost end of the magnet 130 and a first point P11 of the magnet 130.

[0117] At least a portion of the lower spherical members (e.g., B3 and B6) may overlap with the magnet 130 in a direction perpendicular to the optical axis (e.g., in the third direction). For example, at least a portion of the lower spherical members (e.g., B3 and B6) may overlap with another of the two poles (e.g., N pole and S pole) of the magnet 130 in a direction perpendicular to the optical axis (e.g., in the third direction). For example, at least a portion of the lower spherical members (e.g., B3 and B6) may overlap with a second portion of the magnet 130 in a direction perpendicular to the optical axis. Here, the second portion of the magnet 130 may be the region between the lowermost end of the magnet 130 and the second point P12 of the magnet 130.

[0118] In another embodiment, the intermediate spherical members B2 and B6 may overlap with at least one of the two poles (e.g., the N pole and the S pole) of the magnet 130 and the boundary surface (or partition wall) between the N pole and the S pole in a direction perpendicular to the optical axis (e.g., in the third direction). For example, the intermediate spherical members B2 and B6 may overlap with all of the N pole, S pole, and boundary surface between the N pole and the S pole of the magnet 130 in a direction perpendicular to the optical axis (in the third direction). Alternatively, for example, the intermediate spherical members B2 and B6 may overlap not only with one of the N pole and S pole of the magnet 130 in a direction perpendicular to the optical axis (in the third direction), but also with the boundary surface between the N pole and the S pole in a direction perpendicular to the optical axis (in the third direction).

[0119] In an embodiment, to minimize tilting of the coil frame 110 during AF operation, spherical members B1 to B7 can be disposed in corresponding grooves 7A to 7F in the coil frame 110. The spherical members (e.g., B1) can perform rolling or sliding movements in the grooves (e.g., 7A) corresponding to the spherical members (e.g., B1) in the coil frame 110, and multiple different preset points of the coil frame 110 can be supported by multiple spherical members B1 to B6. That is, the portion of the coil frame 110 supported by the spherical members can be fixed and remain unchanged even when the coil frame 110 moves along the optical axis. Therefore, according to the embodiment, multiple stable support points of the coil frame 110 can be ensured during AF operation, and tilting of the coil frame 110 can be prevented.

[0120] The cover member 300 may accommodate the coil holder 110. Additionally, the cover member 300 may accommodate at least a portion of the base 210. The cover member 300 may be in the form of a box, open at its lower portion and including an upper plate 301 and side plates 302. The side plates 302 of the cover member 300 may extend downward from the upper plate 301 of the cover member 300. The shape of the upper plate 301 of the cover member 300 may conform to the shape of the coil holder 110 or the base 210. At least a portion of the upper plate 301 may include a polygonal shape or a curved surface. An opening 303 configured to expose the lens or lens module 400 to external light may be formed in the upper plate 301 of the cover member 300.

[0121] In this embodiment, the inclined side surface (or chamfered surface) of the magnet 130 prevents the magnet 130 from separating from the coil frame 110 due to impact. Furthermore, according to this embodiment, the connection force between the magnet 130 and the coil frame 110 can be increased by the chamfered surface of the magnet 130 and the mounting portion 112. Therefore, the amount of adhesive applied between the magnet 130 and the mounting portion 112 of the coil frame 110 can be reduced, and material costs can be lowered.

[0122] In addition, according to the embodiment, the chamfered shape of the seating portion 112 of the magnet 130 and the coil holder 110 can be used as a position guide for assembly between them, and can facilitate their assembly.

[0123] According to the embodiment, since the coil frame 110 is supported at its preset support point by upper spherical members B1 and B4, lower spherical members B3 and B6, and intermediate spherical members B2 and B4, the friction between the coil frame 110 and the rolling member 33 and the base 210 and the rolling member 33 can be reduced during AF operation, which can prevent or suppress the tilting of the coil frame 110 and improve the reliability of AF operation.

[0124] Figure 12a The illustration shows one embodiment of the rolling member 33 disposed on the coil frame 110.

[0125] Reference Figure 12a The rolling member 33 may include a main spherical member MB and a spacer spherical member SB. The diameter D1 of the main spherical member MB may be larger than the diameter D2 of the spacer spherical member SB. The main spherical member MB may be used to support the coil frame 110 relative to the base 210 during AF operation. The main spherical member MB may contact both the coil frame 110 and the base 210 by the attraction between the yoke 38 and the magnet 130.

[0126] The spacer spherical element SB can absorb and disperse external impacts applied to it and can additionally support the coil frame 110. The spacer spherical element SB does not necessarily contact both the coil frame 110 and the base 210 through the attraction between the yoke 38 and the magnet 130. For example, the spacer spherical element SB can contact either the coil frame 110 or the base 210.

[0127] exist Figure 12a In the illustrated embodiment, each of the upper and lower spherical members can be a main spherical member, and the intermediate spherical member can be a spacer spherical member SB. With this arrangement, the coil frame 110 can be stably supported by the main spherical member MB, external impacts can be dispersed by the spacer spherical member SB, and the coil frame 110 can be additionally supported.

[0128] Figure 12b Another embodiment of the rolling member 33 disposed on the coil frame 110 is illustrated.

[0129] Reference Figure 12b The rolling member 33 may include a main spherical member MB and a spacer spherical member SB arranged alternately along the optical axis and along a direction perpendicular to the optical axis (e.g., along a third direction).

[0130] For example, the first spherical members B1 to B3 may include main spherical members MB and spacer spherical members SB arranged alternately along the optical axis. The second spherical members B4 to B6 may include main spherical members MB and spacer spherical members SB arranged alternately along the optical axis.

[0131] The main spherical member MB in the first spherical member can correspond or be aligned with the spacer spherical member SB in the second spherical member in a direction perpendicular to the optical axis (e.g., in the third direction), and the spacer spherical member SB in the first spherical member can correspond or be aligned with the main spherical member MB in the second spherical member in a direction perpendicular to the optical axis (e.g., in the third direction). By means of Figure 12bThe arrangement shown allows for stable three-point support of the coil frame 110 by the main spherical member MB, and external impacts can be evenly dispersed by the spaced spherical members SB arranged alternately with the main spherical member MB.

[0132] Figure 12c The illustration shows another embodiment of the rolling member 33 disposed on the coil frame 110.

[0133] Reference Figure 12c The upper spherical member can be disposed on one side and the other side of the magnet 130. The middle spherical member can be disposed on the other side of the magnet 130. The lower spherical member can be disposed on one side and the other side of the magnet 130.

[0134] In other words, it can be omitted. Figure 12b In the embodiment, the spacer spherical element SP is used, and stable three-point support for the coil frame 110 can be achieved solely through the main spherical element MB. Although in Figure 12c The diagram shows grooves 7B, 7D, and 7F, but in another embodiment, grooves 7B, 7D, and 7F may be omitted.

[0135] In autofocus cameras used in vehicles and robotics, large lenses are required to increase resolution, and large drive magnets are needed to move the large lenses. As the size of the drive magnet increases, the amount of adhesive used to attach the magnet to the coil holder also increases. Furthermore, due to the large size of the drive magnet, there is a risk of the drive magnet separating from the coil holder when using only adhesive.

[0136] According to the embodiment, by connecting the magnet 130, which has an inclined side surface (or a chamfered surface), to the seating portion 112 of the coil frame 110, the connection force between the magnet 130 and the coil frame 110 can be increased, and the magnet 130 can be prevented from separating from the coil frame 110 due to impact. Therefore, the amount of adhesive applied between the magnet 130 and the seating portion 112 of the coil frame 110 can be reduced, and material costs can be reduced.

[0137] Furthermore, according to the embodiment, by connecting the side surfaces 112B2 and 112B3 of the seating portion 112, which are inclined surfaces, to the inclined side surfaces 8C and 8D of the magnet 130, the coil frame 110 and the magnet 130 can be stably connected to each other without increasing the size of the coil frame 110.

[0138] Furthermore, according to the embodiment, the upper spherical members B1 and B4, the lower spherical members B3 and B6, and the intermediate spherical members B2 and B5 can stably support the coil frame 110 in contact with the corresponding grooves 7A to 7F in the coil frame 110, and thus can prevent or suppress tilting of the coil frame 110 during AF operation. In particular, as the range of motion (or stroke range) of the coil frame in the optical axis direction increases, the possibility of the coil frame tilting during AF operation increases. However, the embodiment has the effect of preventing and suppressing tilting of the coil frame even during AF operation with a large stroke.

[0139] Meanwhile, the lens mobile device according to the above embodiments can be used in various fields, such as for camera modules or optical instruments.

[0140] For example, the camera device according to the embodiments may include an optical instrument designed to form an image of an object in space using properties of light such as reflection, refraction, absorption, interference, and diffraction, to expand the field of view, record or reproduce an image obtained through a lens, perform optical measurements, or transmit or transmit an image. For example, although the optical instrument according to the embodiments may be a mobile phone, cellular phone, smartphone, portable terminal, portable smart instrument, digital camera, laptop computer, digital broadcasting terminal, PDA (personal digital assistant), PMP (portable multimedia player), navigation device, etc., this disclosure is not limited thereto. Furthermore, any device capable of capturing images or taking photographs is possible.

[0141] Figure 13 An exploded perspective view of the camera device 200 according to an embodiment is shown.

[0142] Reference Figure 13 The camera device 200 may include a lens module 400, a lens moving device 100, and an image sensor 810. The camera device 200 may also include a circuit board 800 electrically connected to the lens moving device 100.

[0143] The camera device 200 may also include a filter 600 disposed between the lens module 400 and the image sensor 810. For example, the filter 600 may be disposed on or attached to the base 210. The base 210 may be coupled, attached, or fixed to the upper surface of the circuit board 800 via an adhesive (not shown). In another embodiment, the camera device 200 may also include a "sensor base" disposed between the base 210 and the circuit board 800, and the filter 600 may be disposed on or coupled to the sensor base. The camera device 200 may also include a controller (not shown) electrically connected to the circuit board 800. Here, the controller may also be electrically connected to the position sensor 170.

[0144] Lens module 400 may include lenses and / or lens barrels. Lens module 400 may be mounted or coupled to coil holder 110 of lens moving device 100. For example, lens module 400 may include one or more lenses and lens barrels that house one or more lenses. Light that has passed through lens module 400 may pass through filter 600 and may be radiated to image sensor 810.

[0145] The filter 600 can be used to block light of a specific frequency band from passing through the lens barrel 400 from entering the image sensor 810. For example, the filter 600 can be an infrared blocking filter, but is not limited to this.

[0146] Circuit board 800 may be disposed below lens moving device 100. Circuit board 800 may be electrically connected to circuit board 190 of lens moving device 100. Circuit board 800 may include terminal 801 that is electrically connected to terminals P1 to P4 of circuit board 190 of lens moving device 100. For example, terminals P1 to P4 of circuit board 190 and terminal 801 of circuit board 800 may be connected to each other via solder or conductive adhesive.

[0147] Image sensor 810 can be set or mounted on circuit board 800. Image sensor 810 can receive an image included in the light incident through lens moving device 100 and can convert the received image into an electrical signal. Image sensor 810 can be positioned such that its optical axis coincides with the optical axis of lens module 400. Therefore, image sensor 810 can capture the light that has passed through lens module 400. Image sensor 810 can output the incident light as an image. Image sensor 810 can be, for example, a CCD (charge-coupled device), MOS (metal-oxide-semiconductor), CPD, or CID. However, the type of image sensor is not limited to these. Lens module 400, image sensor 810, and filter 600 can be spaced apart from each other to face each other in a first direction.

[0148] Figure 14 The illustration shows a perspective view of the optical instrument 200A according to an embodiment. Figure 15 The diagram shows... Figure 14 The diagram shows the configuration of the optical instrument 200A.

[0149] Reference Figure 14 and Figure 15 The optical device 200A may include a body 850, a wireless communication unit 710, an audio / video (A / V) input unit 720, a sensing unit 740, an input / output unit 750, a memory unit 760, an interface unit 770, a controller 780, and a power supply unit 790.

[0150] Figure 14The body 850 shown has an elongated shape, but is not limited to it, and can be of various types, such as sliding, folding, swinging or rotating, wherein two or more sub-bodies are connected to be able to move relative to each other.

[0151] The main body 850 may include a shell (outer shell, base, cover, etc.) that defines the appearance of the terminal. For example, the main body 850 may be divided into a front shell 851 and a rear shell 852. Various electronic components of the terminal may be housed in the space defined between the front shell 851 and the rear shell 852.

[0152] The wireless communication unit 710 may include one or more modules that enable wireless communication between the optical device 200A and the wireless communication system or between the optical device 200A and the network in which the optical device 200A resides. For example, the wireless communication unit 710 may include a broadcast receiving module 711, a mobile communication module 712, a wireless internet module 713, a near-field communication module 714, and a location information module 715.

[0153] The A / V input unit 720 is used to input audio or video signals and may include, for example, a camera 721 and a microphone 722. The camera 721 may include a camera device 200 according to an embodiment.

[0154] The sensing unit 740 can sense the current state of the optical device 200A, such as whether the optical device 200A is on or off, its position, the presence of a user's touch, its orientation, or its acceleration / deceleration, and can generate sensing signals to control the operation of the optical device 200A. When the optical device 200A is, for example, a slider cellular phone, the sensing unit 740 can sense whether the slider cellular phone is on or off. Furthermore, the sensing unit 740 can sense the power supply from the power supply unit 790, the connection between the interface unit 770 and external devices, etc.

[0155] The input / output unit 750 is used to generate inputs or outputs such as visual, auditory, or tactile ones. The input / output unit 750 can generate input data for controlling the operation of the optical device 200A and can display the information processed in the optical device 200A.

[0156] The input / output unit 750 may include a keyboard unit 730, a display module 751, a sound output module 752, and a touch screen panel 753. The keyboard unit 730 can generate input data in response to input to the keyboard.

[0157] Display module 751 may include a plurality of pixels, the colors of which vary according to electrical signals applied to the plurality of pixels. For example, display module 751 may include at least one of liquid crystal display, thin-film transistor liquid crystal display, organic light-emitting diode display, flexible display, and 3D display.

[0158] The audio output module 752 can output audio data received from the wireless communication unit 710 in, for example, call signal receiving mode, call mode, recording mode, voice recognition mode or broadcast receiving mode, or it can output audio data stored in the memory unit 760.

[0159] The touchscreen panel 753 can convert the capacitance change caused by the user touching a specific area of ​​the touchscreen into an electrical input signal.

[0160] The memory unit 760 can temporarily store programs for processing and control by the controller 780, as well as input / output data (e.g., telephone numbers, messages, audio data, still images, moving images, etc.). For example, the memory unit 760 can store images captured by the camera 721, such as pictures or moving images.

[0161] Interface unit 770 serves as a path through which the lens moving device connects to an external device connected to optical device 200A. Interface unit 770 can receive power or data from external components and can transmit power or data to corresponding components within optical device 200A, or can transmit data from within optical device 200A to external components. For example, interface unit 770 may include a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting to a device equipped with an identification module, an audio input / output (I / O) port, a video input / output (I / O) port, a headphone jack, etc.

[0162] The controller 780 can control the general operation of the optical device 200A. For example, the controller 780 can perform control and processing related to, for example, voice calls, data communications, and video calls.

[0163] The controller 780 may include a multimedia module 781 for multimedia playback. The multimedia module 781 may be implemented in the controller 780 or may be implemented separately from the controller 780.

[0164] The controller 780 can perform pattern recognition processing that can recognize handwritten or drawing input performed on the touchscreen as characters and images, respectively.

[0165] The power supply unit 790 can supply the power required to operate the corresponding constituent components when it receives external or internal power, under the control of the controller 780.

[0166] The features, configurations, effects, etc., described above in the embodiments are included in at least one embodiment, but this disclosure is not limited to these embodiments. Furthermore, the features, configurations, effects, etc., exemplified in each embodiment can be combined with other embodiments or modified by those skilled in the art. Therefore, anything related to these combinations and modifications should be interpreted as falling within the scope of this disclosure.

[0167] [Industrial Applicability]

[0168] The implementation can be applied to lens moving devices, camera devices, and optical instruments that can prevent the coil holder from tilting during autofocus operation and suppress the separation of the magnet from the coil holder.

Claims

1. A lens-mounted device, comprising: Base; A coil frame, the coil frame being spaced apart from the base; A magnet, which is mounted on the coil frame; A coil, which is disposed on the base and configured to move the coil frame along the optical axis through interaction with the magnet; as well as A rolling member is disposed between the coil frame and the base. The rolling member includes: An upper spherical member is disposed between the first point and the uppermost end of the coil frame; The lower spherical member is disposed between the second point and the lowermost end of the coil frame; and An intermediate spherical component is disposed between the upper spherical component and the lower spherical component. The first point corresponds to 80 percent of the total length of the magnet along the optical axis from its lowest end, and the second point corresponds to 20 percent of the total length of the magnet from its lowest end.

2. The lens moving device according to claim 1, wherein, The upper spherical component is positioned above the uppermost end of the magnet.

3. The lens moving device according to claim 1, wherein, The lower spherical member is positioned below the lowest end of the magnet.

4. The lens moving device according to claim 1, wherein, At least a portion of the upper spherical member overlaps with the magnet in a direction perpendicular to the optical axis.

5. The lens moving device according to claim 1, wherein, At least a portion of the lower spherical member overlaps with the magnet in a direction perpendicular to the optical axis.

6. The lens moving device according to claim 1, wherein, The magnet includes N poles and S poles facing each other along the optical axis, and a boundary surface located between the N poles and the S poles. The intermediate spherical member overlaps with the boundary surface of the magnet in a direction perpendicular to the optical axis.

7. The lens moving device according to claim 1, wherein, The coil holder includes a receiving groove, and the rolling member is disposed in the receiving groove. The receiving groove includes a plurality of grooves spaced apart from each other and corresponding to the upper spherical member, the middle spherical member and the lower spherical member respectively.

8. The lens moving device according to claim 1, wherein, The magnet includes a first surface facing the coil, a second surface opposite to the first surface, a third surface connecting one side of the first surface to one side of the second surface, and a fourth surface connecting the other side of the first surface to the other side of the second surface. The magnet includes a portion whose length decreases from the second surface toward the first surface in a direction parallel to the first surface, and The coil frame includes a seating portion configured to house the magnet therein.

9. The lens moving device according to claim 1, comprising: A circuit board, which is disposed on the base and electrically connected to the coil; as well as A magnetic yoke is disposed on the base so as to face the magnet in a direction perpendicular to the optical axis and configured to exert an attractive force relative to the magnet.

10. The lens moving device according to claim 1, wherein, The upper spherical member, the middle spherical member, and the lower spherical member are disposed on the outer surface of the first side portion of the coil frame facing the coil. The upper spherical component includes a first spherical component disposed on one side of the magnet and a second spherical component disposed on the other side of the magnet. The intermediate spherical component includes a third spherical component disposed on one side of the magnet and a fourth spherical component disposed on the other side of the magnet. The lower spherical member includes a fifth spherical member disposed on one side of the magnet and a sixth spherical member disposed on the other side of the magnet.

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