Aperture device, camera device, and optical device

Abstract

The present embodiment relates to an aperture device comprising: a base; a rotor disposed on the base; a magnet disposed on the rotor; a coil interacting with the magnet; and a ball disposed between the base and the rotor, wherein the rotor includes a stopper overlapping the base in a circumferential direction about an optical axis, and the stopper overlaps the ball in a radial direction.

Description

Aperture devices, camera devices and optical instruments

[0001] The present embodiment relates to an aperture device, a camera device and an optical device.

[0002] Modern smartphones are equipped with cameras capable of taking high-resolution photos and videos.

[0003] In particular, recent smartphone cameras are equipped with various functions such as autofocus, image stabilization, and zoom, providing high satisfaction to many users.

[0004] However, conventional smartphone cameras suffer from performance limitations in low-light environments. This causes images captured in low-light conditions to be noisy and lack clarity, posing a problem.

[0005] (Patent Document 1) KR 10-2015-0100409 A

[0006] The present invention seeks to provide a camera device capable of operating without performance limitations even in dark environments. Furthermore, the present invention seeks to provide an aperture device for the aforementioned camera device.

[0007] Furthermore, the present embodiment seeks to provide an aperture device that prevents a phenomenon in which a rotor tilts during a stopping process, i.e., a process in which the rotor comes into contact with a stator and stops.

[0008] In addition, the present embodiment seeks to provide an aperture device that minimizes the backlash effect of the blade. More specifically, a margin exists between the moving boss and the long hole of the blade, which causes a backlash phenomenon during the blade opening and closing process. The present embodiment seeks to provide an aperture device that minimizes the effect of the backlash phenomenon on the hole through which light passes.

[0009] An aperture device according to the present embodiment comprises: a base; a rotor disposed on the base; a magnet disposed on the rotor; a coil interacting with the magnet; and a ball disposed between the base and the rotor, wherein the rotor includes a stopper overlapping the base in a circumferential direction centered on an optical axis, and the stopper can overlap the ball in a radial direction.

[0010] The lower end of the above stopper may be positioned higher than the lower end of the above ball.

[0011] The above stopper can come into contact with the base when the rotor rotates.

[0012] The stopper includes a stopping surface that contacts the base, the base includes a stopping surface that contacts the stopping surface of the stopper, and the stopping surface of the stopper and the stopping surface of the base may be planes that are parallel to each other.

[0013] The rotor includes a magnet receiving portion in which the magnet is placed, and when the rotor rotates and the stopper of the rotor comes into contact with the base, the magnet receiving portion of the rotor can be spaced apart from the base.

[0014] The base includes an inclined surface that overlaps and directly faces the magnet receiving portion in the circumferential direction, and at least a portion of the inclined surface of the base can be arranged to be inclined with respect to the facing surface of the magnet receiving portion.

[0015] The stopper of the rotor may include first to fourth stoppers spaced apart from each other, and the magnet receiving portion of the rotor may include a first magnet receiving portion arranged between the second stopper and the third stopper, and a second magnet receiving portion arranged between the first stopper and the fourth stopper.

[0016] The substrate is disposed on the base, the coil is disposed on the inner surface of the substrate, and a second stiffener may be disposed at a position corresponding to the coil on the outer surface of the substrate.

[0017] The base includes a first yoke arranged to overlap the coil in the circumferential direction, and an attractive force can be applied between the first yoke and the magnet.

[0018] A second yoke is disposed on the base and has a magnet and a force acting on it, and the rotor can press the ball toward the base by the force of attraction between the magnet and the second yoke.

[0019] A blade including a fixed boss coupling hole and a movable boss coupling hole spaced apart from the fixed boss coupling hole and formed longer than the fixed boss coupling hole, wherein the base may include a fixed boss arranged in the fixed boss coupling hole, and the rotor may include a movable boss arranged in the movable boss coupling hole.

[0020] The above blade includes a plurality of blades forming a hole through which light passes, and the diameter of the hole when the movable boss moves as close as possible to the fixed boss may be larger than the diameter of the hole when the movable boss moves as far as possible from the fixed boss.

[0021] Each of the plurality of blades may have a shape in which the width gradually narrows from the outside to the inside.

[0022] The above blade includes six blades, and the six blades can be arranged in two layers of three blades each.

[0023] The blade may include an inner edge forming a hole through which light passes, and the inner edge may include a first region having a first curvature, a second region having a second curvature different from the first curvature, and a third region having a third curvature different from the first curvature and the second curvature.

[0024] The above blade is controlled to change the diameter of the hole through which light passes, and the hole can be adjusted to have five or more different diameters.

[0025] The above blade forms a hole through which light passes, and when the hole has a maximum diameter, when viewed from above, the moving boss coupling hole of the blade may have a shape that is curved toward the optical axis.

[0026] A camera device according to the present embodiment comprises: a printed circuit board; an image sensor disposed on the printed circuit board; a lens driving device disposed on the printed circuit board; a lens coupled to the lens driving device; and the aperture device disposed on the lens.

[0027] A camera device according to the present embodiment may include a main body; the camera device disposed in the main body; and a display disposed in the main body and outputting at least one of a video and an image captured by the camera device.

[0028] Through the present invention, the camera function of a smartphone can be used without performance limitations even in a dark environment.

[0029] Furthermore, through this embodiment, the phenomenon of tilt occurring in the rotor during the stopping process, i.e., the process in which the rotor comes into contact with the stator and stops, can be prevented.

[0030] Furthermore, the present embodiment can minimize the backlash effect of the blade. More specifically, there is a margin between the moving boss and the long hole of the blade, which causes a backlash phenomenon during the blade opening and closing process. However, the present embodiment can minimize the effect of the backlash phenomenon on the hole through which light passes.

[0031] Fig. 1 is a perspective view of an aperture device according to the present embodiment.

[0032] Figure 2 is a cross-sectional view taken along line AA of Figure 1.

[0033] Figure 3 is a cross-sectional view viewed from BB in Figure 1.

[0034] Fig. 4 is a cross-sectional view of an aperture device according to the present embodiment, cut perpendicular to the optical axis and viewed from above.

[0035] Figure 5 is a cross-sectional view taken from above, perpendicular to the optical axis, of the lower portion than Figure 4.

[0036] Fig. 6 is an exploded perspective view of an aperture device according to the present embodiment.

[0037] Fig. 7 is a perspective view of an aperture device according to the present embodiment with the cover omitted.

[0038] Figure 8 is a perspective view of Figure 7 with the blade omitted.

[0039] Figure 9 is a perspective view of Figure 8 with the rotor omitted.

[0040] Fig. 10 is a perspective view showing the base and related components of an aperture device according to the present embodiment.

[0041] Fig. 11 is a bottom perspective view showing the rotor and related configuration of the aperture device according to the present embodiment.

[0042] Fig. 12 is a cross-sectional perspective view of an aperture device according to the present embodiment with the cover omitted.

[0043] Figure 13 is an enlarged view of area A of Figure 12.

[0044] Figure 14 is an enlarged view of area B of Figure 12.

[0045] Fig. 15 is a bottom perspective view of the aperture device according to the present embodiment with the cover omitted.

[0046] Fig. 16 is a plan view of an aperture device according to the present embodiment with the cover omitted.

[0047] Fig. 17 (a) is a plan view showing a state in which the diameter of the light passage hole of the aperture device according to the present embodiment is increased, and (b) is a plan view showing a state in which the diameter of the light passage hole is reduced.

[0048] Fig. 18 is a perspective view showing a lens and a lens driving device of a camera device according to the present invention.

[0049] Fig. 19 is a cross-sectional view taken along line AA of Fig. 18.

[0050] Figure 20 is a perspective view of Figure 18 with the cover omitted.

[0051] Figure 21 is a perspective view of Figure 20 with the lens, holder, and magnet omitted.

[0052] Figure 22 is a perspective view of Figure 20 with the housing, substrate, and related components omitted.

[0053] Figure 23 is an exploded perspective view of a camera device according to the present invention.

[0054] Figure 24 is a perspective view of an optical device according to the present invention.

[0055] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0056] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0057] In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0058] Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0059] In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and / or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

[0060] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and are not intended to limit the nature, order, or sequence of the components.

[0061] And, when a component is described as being 'connected', 'coupled', or 'connected' to another component, it may include not only cases where the component is 'connected', 'coupled', or 'connected' directly to the other component, but also cases where the component is 'connected', 'coupled', or 'connected' by another component between the component and the other component.

[0062] Additionally, when described as being formed or arranged "above" or "below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below," the meaning may include not only the upward direction but also the downward direction based on one component.

[0063] The 'optical axis direction' used below is defined as the optical axis direction of the lens and / or image sensor coupled to the lens drive device.

[0064] The 'vertical direction' used below may be a direction parallel to or the same direction as the optical axis direction. The vertical direction may correspond to the 'z-axis direction'. The 'horizontal direction' used below may be a direction perpendicular to the vertical direction. That is, the horizontal direction may be a direction perpendicular to the optical axis. Therefore, the horizontal direction may include the 'x-axis direction' and the 'y-axis direction'.

[0065] The 'auto focus (AF) function' used below is defined as a function that automatically focuses on a subject by adjusting the distance from the image sensor by moving the lens in the optical axis direction according to the distance of the subject so that a clear image of the subject can be obtained on the image sensor. In addition, 'closed-loop auto focus (CLAF) control' is defined as a function that detects the distance between the image sensor and the lens and provides feedback control of the position of the lens in real time to improve the accuracy of focus adjustment.

[0066] Hereinafter, one of the “stopping surface (203a)”, the “stopping surface (113)”, and the “slope surface (114)” may be referred to as the “first surface”, the other may be referred to as the “second surface”, and the other may be referred to as the “third surface”.

[0067] Hereinafter, each of the “first stiffener (141)” and the “second stiffener (142)” may be referred to as a “stiffener.”

[0068] Hereinafter, one of the “high-information boss coupling hole (310)”, the “moving boss coupling hole (320)” and the “hole (301)” may be referred to as the “first hole”, the other may be referred to as the “second hole” and the other may be referred to as the “third hole”.

[0069]

[0070] Below, the configuration of the aperture device according to the present embodiment is described with reference to the drawings.

[0071] Fig. 1 is a perspective view of an aperture device according to the present embodiment. Fig. 2 is a cross-sectional view taken along line AA of Fig. 1. Fig. 3 is a cross-sectional view taken along line BB of Fig. 1. Fig. 4 is a cross-sectional view taken along line AA of Fig. 1 and viewed from above of the aperture device according to the present embodiment. Fig. 5 is a cross-sectional view taken along line BB of Fig. 4 and viewed from above of a portion lower than Fig. 4 and viewed along line AA of Fig. 1. Fig. 6 is an exploded perspective view of an aperture device according to the present embodiment. Fig. 7 is a perspective view of an aperture device according to the present embodiment with a cover omitted. Fig. 8 is a perspective view of Fig. 7 with a blade omitted. Fig. 9 is a perspective view of Fig. 8 with a rotor omitted. Fig. 10 is a perspective view illustrating a base and related components of an aperture device according to the present embodiment. Fig. 11 is a bottom perspective view illustrating a rotor and related components of an aperture device according to the present embodiment. Fig. 12 is a cross-sectional perspective view of an aperture device according to the present embodiment with a cover omitted. Fig. 13 is an enlarged view of area A of Fig. 12. Fig. 14 is an enlarged view of area B of Fig. 12. Fig. 15 is a bottom perspective view of an aperture device according to the present embodiment with the cover omitted. Fig. 16 is a plan view of an aperture device according to the present embodiment with the cover omitted. Fig. 17 (a) is a plan view showing a state in which the diameter of the light passage hole of the aperture device according to the present embodiment is enlarged, and (b) is a plan view showing a state in which the diameter of the light passage hole is reduced.

[0072] The aperture device (10A) may be an aperture. The aperture device (10A) can control the amount of light passing through the lens. The aperture device (10A) can control the amount of light incident on the image sensor (60). The aperture device (10A) can control the size of the hole through which light passes.

[0073] The aperture device (10A) can be placed on the lens module (20). The aperture device (10A) can be placed on the lens module (20). The aperture device (10A) can be combined with the lens module (20). The aperture device (10A) can be fixed to the lens module (20). The aperture device (10A) can move integrally with the lens module (20). The aperture device (10A) can move together with the lens module (20). The aperture device (10A) can move in the optical axis direction together with the lens module (20).

[0074] The aperture device (10A) may include a stator (100). The stator (100) may be a fixed part. The stator (100) may be a part that is relatively fixed with respect to the rotor (200). The stator (100) may movably support the rotor (200).

[0075] The aperture device (10A) may include a base (110). The stator (100) may include a base (110). The base (110) may be coupled to a cover (120). The base (110) may accommodate a rotor (200). The base (110) may movably support the rotor (200).

[0076] The base (110) may include a fixed boss (111). The fixed boss (111) may include a protrusion. The fixed boss (111) may be coupled with the blade (300). The fixed boss (111) may be placed in the fixed boss coupling hole (310) of the blade (300). The fixed boss (111) may be inserted into the fixed boss coupling hole (310) of the blade (300). The blade (300) may pivotally move about the fixed boss (111) of the base (110).

[0077] The base (110) may include a rail (112). A ball (500) may be placed on the rail (112). The ball (500) may be placed on the rail (112). The rail (112) may contact the ball (500) at two points. The ball (500) may move along the rail (112). The ball (500) may roll along the rail (112).

[0078] The base (110) may include a stopping surface (113). The stopping surface (113) may contact a stopping surface (203a) of a stopper (203) of a rotor (200). The stopping surface (113) may contact a stopper (203) of a rotor (200). The stopping surface (113) may contact the rotor (200).

[0079] The stopping surface (203a) of the stopper (203) and the stopping surface (113) of the base (110) may be planes that are parallel to each other. The stopping surface (203a) of the stopper (203) and the stopping surface (113) of the base (110) may be parallel to each other. The stopping surface (203a) of the stopper (203) may be parallel to the optical axis. The stopping surface (113) of the base (110) may be parallel to the optical axis.

[0080] The optical axis length of the stopping surface (113) may be shorter than the optical axis length of the inclined surface (114). In this case, a gradient, i.e., an inclined surface, is unnecessary during injection, so the stopping surface (113) can be formed parallel to the optical axis.

[0081] The base (110) may include an inclined surface (114). The inclined surface (114) may overlap the magnet receiving portion (204) in the circumferential direction. The inclined surface (114) may directly face the magnet receiving portion (204) in the circumferential direction. At least a portion of the inclined surface (114) of the base (110) may be arranged to be inclined with respect to the facing surface of the magnet receiving portion (204). The inclined surface (114) of the base (110) may be arranged to be inclined with respect to the optical axis. The inclined surface (114) of the base (110) may be arranged not to be parallel to the optical axis.

[0082] The aperture device (10A) may include a cover (120). The stator (100) may include a cover (120). The cover (120) may be disposed on a base (110). The cover (120) may be disposed on the base (110). The cover (120) may accommodate a rotor (200) therein. The cover (120) may include an upper plate (121) and a side plate (122) extending from the upper plate (121).

[0083] The aperture device (10A) may include a substrate (130). The stator (100) may include the substrate (130). The substrate (130) may be disposed on the base (110). The substrate (130) may be disposed on the base (110). The substrate (130) may be disposed on the outer peripheral surface of the base (110). The substrate (130) may be disposed on the outer surface of the base (110). A coil (420) may be disposed on the substrate (130). A sensor (430) may be disposed on the substrate (130).

[0084] The coil (420) may be placed on the inner surface of the substrate (130). A first stiffener (141) may be placed at a position corresponding to the coil (420) on the outer surface of the substrate (130).

[0085] The substrate (130) may be electrically connected to the substrate (870) of the lens driving device (800). Through this, the substrate (130) may receive power from the printed circuit board (50). The substrate (130) of the aperture device (10A) and the substrate (870) of the lens driving device (800) may be directly connected. Alternatively, a separate conductive member may be provided that connects the substrate (130) of the aperture device (10A) and the substrate (870) of the lens driving device (800). As a variation, the substrate (130) of the aperture device (10A) may be directly connected to the printed circuit board (50) without being connected to the substrate (870) of the lens driving device (800).

[0086] The aperture device (10A) may include a first stiffener (141). The first stiffener (141) may be a reinforcing plate. The first stiffener (141) may be disposed on the substrate (130). The first stiffener (141) may be disposed on the outer surface of the substrate (130). The first stiffener (141) may reinforce the strength of the substrate (130). The first stiffener (141) may be disposed at a position corresponding to the coil (420). The first stiffener (141) may be formed of metal.

[0087] The aperture device (10A) may include a second stiffener (142). The second stiffener (142) may be a reinforcing plate. The second stiffener (142) may be disposed on the substrate (130). The second stiffener (142) may be disposed on the outer surface of the substrate (130). The second stiffener (142) may reinforce the strength of the substrate (130). The second stiffener (142) may be disposed at a position corresponding to the first yoke (610). The second stiffener (142) may be formed of metal.

[0088] The aperture device (10A) may include a rotor (200). The rotor (200) may be a moving part. The rotor (200) may be a movable part. The rotor (200) may be a mover. The rotor (200) may be a mover. The rotor (200) may be a mover. The rotor (200) may be a carrier.

[0089] The rotor (200) can be placed on the stator (100). The rotor (200) can be placed on the stator (100). The rotor (200) can be movably placed on the stator (100). The rotor (200) can be rotatably placed on the stator (100). The rotor (200) can be placed on the base (110). The rotor (200) can be movably placed on the base (110). The rotor (200) can be placed within the base (110). The rotor (200) can be placed within the cover (120). The rotor (200) can rotate within the base (110). The rotor (200) can rotate within the cover (120). The rotor (200) can move the blade (300). The rotor (200) can move together with the blades (300).

[0090] The rotor (200) may include a movable boss (201). The movable boss (201) may protrude upward from the body of the rotor (200). The movable boss (201) may be formed on the upper surface of the body of the rotor (200). The movable boss (201) may be coupled with the blade (300). Through this, when the rotor (200) moves, the blade (300) may also move. The movable boss (201) may be positioned in the movable boss coupling hole (320) of the blade (300). The movable boss (201) may be positioned so as to be movable within the movable boss coupling hole (320) of the blade (300). The movable boss (201) may be inserted into the movable boss coupling hole (320) of the blade (300). The moving boss (201) can move within the moving boss joining hole (320) of the blade (300).

[0091] The rotor (200) may include a rail (202). A ball (500) may be placed on the rail (202). The ball (500) may be placed on the rail (202). The rail (202) may contact the ball (500) at two points. The ball (500) may move along the rail (202). The ball (500) may roll along the rail (202).

[0092] The rotor (200) may include a stopper (203). The stopper (203) may come into contact with the base (110) when the rotor (200) rotates. Through this, the rotational range of the rotor (200) may be limited. The stopper (203) may have a protrusion shape that protrudes downward.

[0093] The stopper (203) can overlap with the base (110) in the circumferential direction centered on the optical axis. The stopper (203) can overlap with the ball (500) in the radial direction. The lower end of the stopper (203) can be positioned higher than the lower end of the ball (500).

[0094] The stopper (203) may include a plurality of stoppers. The stopper (203) may include four stoppers. The stopper (203) may include first to fourth stoppers (203-1, 203-2, 203-3, 203-4). The stopper (203) of the rotor (200) may include first to fourth stoppers (203-1, 203-2, 203-3, 203-4) that are spaced apart from each other.

[0095] The stopper (203) may include a stopping surface (203a). The stopping surface (203a) may contact the base (110). The stopping surface (203a) may contact the stopping surface (113) of the base (110).

[0096] The rotor (200) may include a magnet receiving portion (204). A magnet (410) may be placed in the magnet receiving portion (204). The magnet receiving portion (204) may accommodate at least a portion of the magnet (410).

[0097] When the rotor (200) rotates and the stopper (203) of the rotor (200) comes into contact with the base (110), the magnet receiving portion (204) of the rotor (200) can be separated from the base (110).

[0098] In the present embodiment, the distance between the stopper (203) and the base (110) (see d1 in FIG. 13) may be shorter than the shortest distance between the magnet receiving portion (204) and the base (110) (see d2 in FIG. 14). Meanwhile, due to the inclined surface (114) of the base (110), the shortest distance between the base (110) and the magnet receiving portion (204) (see d2 in FIG. 14) may be smaller than the maximum distance in the circumferential direction between the base (110) and the magnet receiving portion (204) (see d3 in FIG. 14).

[0099] In this embodiment, a structure may be included in which a stopper (203) of the rotor (200) for stopping between the base (110) and the rotor (200) is placed in an area overlapping the ball (500) in a direction perpendicular to the optical axis. In particular, since the stopper (203) of the base (110) and the rotor (200) have parallel planes in contact at that area, tilting can be prevented.

[0100] The stopper (203) of the rotor (200) may overlap with the ball in a direction perpendicular to the optical axis. The stopper (203) of the rotor (200) may be positioned higher than the center of the ball (500). When the stopper (203) is positioned at the mentioned position, the length of the stopping area of ​​the base (110) in the direction parallel to the optical axis may be formed shorter. Therefore, since a gradient, i.e., an inclined surface, is not required during injection, injection is possible without a gradient, which may be more suitable for the stopper function. The stopper (203) of the rotor (200) may not overlap with the magnet (410) in a direction perpendicular to the optical axis. However, as a variation, the area overlapping with the magnet (310) of the rotor (200) may be used as an auxiliary stopping area.

[0101] The magnet receiving portion (204) may include a plurality of magnet receiving portions. The magnet receiving portion (204) may include two magnet receiving portions. The magnet receiving portion (204) may include first and second magnet receiving portions (204-1, 204-2). The magnet receiving portion (204) of the rotor (200) may include a first magnet receiving portion (204-1) arranged between the second stopper (203-2) and the third stopper (203-3), and a second magnet receiving portion (204-1) arranged between the first stopper (203-1) and the fourth stopper (203-4).

[0102] The aperture device (10A) may include a blade (300). The blade (300) may be a member that blocks light. The blade (300) may be a light-blocking member. The blade (300) may be placed on the stator (100). The blade (300) may be placed on the base (110). The blade (300) may be placed inside the cover (120). The blade (300) may be placed on the rotor (200). The blade (300) may move together with the rotor (200). That is, when the rotor (200) moves, the blade (300) may also move together.

[0103] The blade (300) may include a first part coupled with the stator (100) and a second part coupled with the rotor (200). Through this, when the rotor (200) moves, the blade (300) can pivotally move with respect to the stator (100).

[0104] The blade (300) may include a hole (301). The blade (300) may include a hole (301) formed by a plurality of blades (300). The size or shape of the hole (301) may be changed by the plurality of blades (300). Light may pass through the hole (301). The hole (301) may be hollow. The hole (301) may be a light-transmitting hole. The blade (300) may be controlled to change the diameter of the hole (301) through which light passes. The hole (301) may be adjusted to have at least five different diameters. The hole (301) of the blade (300) may be adjusted to have at least five different diameters, including f1.4, f1.8, f2.0, f2.8, and f4.0. Furthermore, the hole (301) may be adjusted to have ten or more different diameters. In this embodiment, the curvature of multiple areas of the inner edge of the blade (300) can be varied so that the roundness of the hole (301) can be maximized in all control stages of the hole (301).

[0105] The blade (300) includes an inner edge forming a hole (301) through which light passes, and the inner edge may include a first region having a first curvature (see r1 in FIG. 16), a second region having a second curvature (see r2 in FIG. 16) different from the first curvature, and a third region having a third curvature (see r3 in FIG. 16) different from the first curvature and the second curvature.

[0106] In this embodiment, when current is applied to the coil (420), the magnet (410) can move due to the electromagnetic interaction between the magnet (410) and the coil (420). At this time, the rotor (200) can move together with the magnet (410). As the rotor (200) moves, the movable boss (201) of the rotor (200) can pressurize and move the blade (300) within the movable boss coupling hole (320) of the blade (300). At this time, the blade (300) can pivotally move around the fixed boss (111). Through this, the diameter of the hole (301) formed by the plurality of blades can be changed.

[0107] In this embodiment, the diameter of the hole (301) when the movable boss (201) moves as close as possible to the fixed boss (111) (see (a) of FIG. 17) may be larger than the diameter of the hole (301) when the movable boss (201) moves as far as possible from the fixed boss (111) (see (b) of FIG. 17).

[0108] When the distance between the fixed boss (111) and the movable boss (201) is close, the size of the central hole (301) formed by the blade (300) is large (see (a) of FIG. 17), and when the distance between the fixed boss (111) and the movable boss (201) is far, the size of the central hole (301) may be small (see (b) of FIG. 17).

[0109] There is a margin (gap) between the moving boss (201) and the moving boss joining hole (320), which is the long hole of the blade (300), and thus backlash may occur. When the distance between the fixed boss (111) and the moving boss (201) is close, the backlash of the blade (300) has a greater influence on the shape of the central hole (301) than when the distance between the fixed boss (111) and the moving boss (201) is far. In the present embodiment, in a situation where the influence of the backlash is large, the diameter of the central hole (301) can be made large, thereby minimizing the influence of the backlash of the blade (300) on the shape of the hole (301). At this time, the central hole (301) may be an area that receives light.

[0110] When looking from above in the direction of light incidence, when specifying a blade (300) located at the 1 o'clock direction in FIG. 16, a moving boss coupling hole (320) or a moving boss (201) may be placed on the right side of a line connecting the center of the central hole (301) (see OA in FIG. 16) and the center of the fixed boss (111) (see l in FIG. 16).

[0111] In addition, the width of the blade (300) may be a shape that becomes wider as it goes from the part adjacent to the central hole (301) to the fixed boss (111) (see W1 < W2 < W3 < W4 in FIG. 16). At this time, the width may be a width in a vertical direction in the straight area of ​​the blade (300). In other words, each of the plurality of blades may have a shape in which the width gradually becomes narrower as it goes from the outside to the inside.

[0112] The blade (300) may include a fixed boss coupling hole (310). The blade (300) may include a fixed boss coupling hole (310) into which the fixed boss (111) of the stator (100) is inserted.

[0113] The blade (300) may include a movable boss coupling hole (320). The blade (300) may include a movable boss coupling hole (320) into which the movable boss (201) of the rotor (200) is inserted. The movable boss coupling hole (320) may be formed as an elongated hole. The movable boss coupling hole (320) may be spaced apart from the fixed boss coupling hole (310). The movable boss coupling hole (320) may be formed longer than the fixed boss coupling hole (310).

[0114] The blade (300) can form a hole (301) through which light passes. In this case, when the hole (301) has a maximum diameter, when viewed from above, the moving boss coupling hole (320) of the blade (300) can have a shape that is curved toward the optical axis.

[0115] The blade (300) may include a plurality of blades. The blade (300) may include six blades. The six blades may be arranged in two layers of three blades each. The blade (300) may include three upper blades, three lower blades, and one base sheet (350) arranged below the lower blades.

[0116] In this embodiment, multiple blades can be arranged in two layers. In the comparative example where the blades are arranged in three layers, there is a problem that the thickness in the optical axis direction is thicker compared to the two layers. Meanwhile, optically, it is advantageous for the blades and lenses to be arranged as close as possible, but the blades in the third layer, which are arranged highest, may be disadvantageous because they are too far from the lens. Conversely, the blades in the two layers have the advantage of being relatively thin in the optical axis direction and the distance between the uppermost layer of the blades and the lens is relatively close.

[0117] The aperture device (10A) may include a driving unit (400). The driving unit (400) may move the rotor (200). The driving unit (400) may move the blade (300). The driving unit (400) may move the rotor (200) through electromagnetic interaction. The driving unit (400) may include a magnet (410) and a coil (420).

[0118] The aperture device (10A) may include a magnet (410). The driving unit (400) may include a magnet (410). The magnet (410) may be placed on the rotor (200). The magnet (410) may be coupled to the rotor (200). The magnet (410) may be fixed to the rotor (200). The magnet (410) may be bonded to the rotor (200) with an adhesive. The magnet (410) may be placed on the lower surface of the rotor (200).

[0119] The magnet (410) is movable. The magnet (410) can move through interaction with the coil (420). The magnet (410) can move integrally with the rotor (200). The magnet (410) can move together with the rotor (200).

[0120] The aperture device (10A) may include a coil (420). The driving unit (400) may include the coil (420). The coil (420) may be disposed on the stator (100). The coil (420) may be disposed on the substrate (130). The coil (420) may be coupled to the substrate (130). The coil (420) may be soldered to the substrate (130). The coil (420) may be electrically connected to the substrate (130). Alternatively, the coil (420) may be formed as a pattern coil on the substrate (130). The coil (420) may be disposed on the base (110). The coil (420) may be disposed within the cover (120).

[0121] The coil (420) can be positioned corresponding to the magnet (410). The coil (420) can overlap the magnet (410). The coil (420) can overlap the magnet (410) in a direction perpendicular to the optical axis. In a variation, the coil (420) and the magnet (410) can overlap in the optical axis direction. The coil (420) can face the magnet (410). The coil (420) can face the magnet (250). The coil (420) can interact with the magnet (410). The coil (420) can electromagnetically interact with the magnet (410). When current is applied to the coil (420), the magnet (410) can move due to the interaction between the electromagnetic field of the coil (420) and the electromagnetic field of the magnet (410). The coil (420) can move the magnet (410). The coil (420) can remain relatively fixed when the magnet (410) moves.

[0122] Alternatively, the coil (420) may be placed on the rotor (200) and the magnet (410) may be placed on the stator (100). The coil (420) may move with the rotor (200) and the magnet (410) may be fixed.

[0123] The aperture device (10A) may include a sensor (430). The driving unit (400) may include the sensor (430). The sensor (430) may be disposed on the substrate (130). The sensor (430) may be electrically connected to the substrate (130). The sensor (430) may detect the magnet (410). The sensor (430) may be a Hall sensor. The sensor (430) may detect the magnetic force of the magnet (410). The sensor (430) may be disposed at a position corresponding to the magnet (410). The sensor (430) may overlap the magnet (410) in the optical axis direction. Alternatively, the sensor (430) may overlap the magnet (410) in a direction perpendicular to the optical axis. Control of the blade (300) can be fed back in real time through the position of the magnet (410) detected by the sensor (430). That is, the blade (300) can be feedback controlled in real time by the sensor (430).

[0124] The aperture device (10A) may include a guide member. The guide member may guide the movement of the rotor (200) relative to the stator (100).

[0125] The aperture device (10A) may include a ball (500). The guide member may include the ball (500). The ball (500) may be disposed between the stator (100) and the rotor (200). The ball (500) may be disposed between the base (110) and the rotor (200). The ball (500) may be disposed on the base (110). The ball (500) may be in contact with the base (110). The ball (500) may move along the base (110). The ball (500) may move along the rail (112) of the base (110). The ball (500) may be disposed on the rotor (200). The ball (500) may be in contact with the rotor (200). The ball (500) may move along the rotor (200). The ball (500) can move along the rail (202) of the rotor (200). The ball (500) can be placed between the rail (112) of the base (110) and the rail (202) of the rotor (200).

[0126] The ball (500) can guide the movement of the rotor (200) in the circumferential direction. That is, the ball (500) can guide the rotor (200) to rotate around the optical axis. The ball (500) can restrict the rotor (200) to only rotate around the optical axis.

[0127] The ball (500) may include a plurality of balls. The ball (500) may include four balls. The ball (500) may include first to fourth balls.

[0128] The aperture device (10A) may include a first yoke (610). The first yoke (610) may be disposed on the inner surface of the substrate (130). The first yoke (610) may be disposed on the base (110). The first yoke (610) may be disposed between the base (110) and the substrate (130). The first yoke (610) may be disposed to overlap the coil (420) in the circumferential direction. An attractive force may be applied between the first yoke (610) and the magnet (410). Through this structure, when no current is applied to the coil (420), the magnet (410) may be disposed at a position adjacent to the first yoke (610) rather than at an arbitrary position. Accordingly, even if no current is applied to the coil (420), the magnet (410) and the rotor (200) are fixed, so noise generated by the rotor (200) hitting the stator (100) can be prevented.

[0129] The aperture device (10A) may include a ball pressurizing member. The ball pressurizing member may press the ball (500) against the rotor (200) and the base (110).

[0130] The aperture device (10A) may include a second yoke (620). The ball pressurizing member may include the second yoke (620). The second yoke (620) may be disposed on the stator (100). The second yoke (620) may be disposed on the base (110). The second yoke (620) may be disposed on the lower portion of the base (110). The second yoke (620) may be insert-molded on the lower portion of the base (110). As a variation, the second yoke (620) may be disposed on the lower surface of the base (110). The second yoke (620) may be disposed at a position corresponding to the magnet (410). The second yoke (620) may be disposed on the outer side in a diagonally downward direction of the magnet (410). The second yoke (620) can exert an attractive force on the magnet (410). Through this, the ball (500) can be pressed between the rotor (200) and the stator (100). The ball (500) can be pressed between the rotor (200) and the base (110) by the attractive force between the magnet (410) and the second yoke (620). The rotor (200) can press the ball (500) toward the base (110) by the attractive force between the magnet (410) and the second yoke (620).

[0131]

[0132] Below, the configuration of the camera device according to the present embodiment is described with reference to the drawings.

[0133] Fig. 18 is a perspective view illustrating a lens and a lens driving mechanism of a camera device according to the present invention. Fig. 19 is a cross-sectional view taken along line AA of Fig. 18. Fig. 20 is a perspective view of Fig. 18 with the cover omitted. Fig. 21 is a perspective view of Fig. 20 with the lens, holder, and magnet omitted. Fig. 22 is a perspective view of Fig. 20 with the housing, substrate, and related components omitted. Fig. 23 is an exploded perspective view of a camera device according to the present invention.

[0134] The camera device (10) may include a camera module.

[0135] The camera device (10) may include a lens driving device (800).

[0136] The lens driving device (800) may be a voice coil motor (VCM). The lens driving device (800) may be a lens driving motor. The lens driving device (800) may be a lens driving actuator. The lens driving device (800) may include an AF module. Alternatively, the lens driving device (800) may include an OIS module.

[0137] The lens actuator (800) may include a base (810). The base (810) may be coupled with a cover (820). The base (810) may be coupled with a housing (840). The base (810) may support the holder (830) from below. The base (810) may be placed on the cover (820). The base (810) may be placed on the housing (840). The base (810) may include a lower plate and pillars protrudingly formed at a plurality of corner areas of the lower plate.

[0138] The lens actuator (800) may include a cover (820). The cover (820) may be disposed on the base (810). The cover (820) may be disposed on the base (810). The cover (820) may be coupled to the base (810). The cover (820) may be fixed to the base (810). The cover (820) may be adhesively bonded to the base (810). The cover (820) may be disposed on the housing (840). The cover (820) may be disposed on the holder (830). The cover (820) may accommodate the housing (840). The cover (820) may accommodate the holder (830). The cover (820) may include an upper plate and a plurality of side plates extending from the upper plate.

[0139] The lens actuator (800) may include a holder (830). The holder (830) may be disposed on the base (810). The holder (830) may be disposed on the base (810). The holder (830) may be disposed within the base (810). The holder (830) may be movably disposed on the base (810). The holder (830) may be movable in the optical axis direction. The holder (830) may be coupled to the lens module (20). The holder (830) may be disposed within the housing (840). The holder (830) may be disposed in the housing (840). The holder (830) may be movable in the optical axis direction with respect to the housing (840).

[0140] The lens actuator (800) may include a housing (840). The housing (840) may be disposed on the base (810). The housing (840) may be disposed on the base (810). The housing (840) may be coupled to the base (810). The housing (840) may be fixed to the base (810). The housing (840) may be adhesively bonded to the base (810). The housing (840) may accommodate a holder (830). The housing (840) may be formed integrally with the base (810).

[0141] The lens actuator (800) may include a magnet (850). The magnet (850) may be placed on the holder (830). The magnet (850) may be placed on the holder (830). The magnet (850) may be coupled to the holder (830). The magnet (850) may be fixed to the holder (830). The magnet (850) may be bonded to the holder (830) with an adhesive.

[0142] The magnet (850) is movable. The magnet (850) can move through interaction with the coil (860). The magnet (850) can move integrally with the holder (830). The magnet (850) can move together with the holder (830). The magnet (850) can be placed on one side of the holder (830). The magnet (850) can be placed in a groove formed on the side of the holder (830).

[0143] The magnet (850) may be a four-pole magnet. The upper region of the magnet (850) includes a north pole and a south pole, the lower region of the magnet (850) includes a south pole and a north pole, and the region between the lower and upper regions of the magnet (850) may have a neutral polarity.

[0144] The lens actuator (800) may include a coil (860). The coil (860) may be disposed on a fixed portion. The coil (860) may be disposed on a substrate (870). The coil (860) may be disposed on an inner surface of the substrate (870). The coil (860) may be coupled to the substrate (870). The coil (860) may be soldered to the substrate (870). The coil (860) may be electrically connected to the substrate (870). The coil (860) may be disposed on a housing (840). The coil (860) may be disposed on a base (810).

[0145] The coil (860) can be positioned corresponding to the magnet (850). The coil (860) can overlap with the magnet (850). The coil (860) can overlap with the magnet (850) in a direction perpendicular to the optical axis. The coil (860) can face the magnet (850). The coil (860) can face the magnet (850). The coil (860) can interact with the magnet (850). The coil (860) can electromagnetically interact with the magnet (850). When current is applied to the coil (860), the magnet (850) can move due to the interaction between the electromagnetic field of the coil (860) and the electromagnetic field of the magnet (850). The coil (860) can move the magnet (850). The coil (860) can remain relatively fixed when the magnet (850) moves.

[0146] Alternatively, the coil (860) may be placed in the holder (830) and the magnet (850) may be placed in the fixing portion. The magnet (850) may be placed in the housing (840). The magnet (850) may be placed in the base (810). The coil (860) may move together with the holder (830) and the magnet (850) may be fixed.

[0147] The lens actuator (800) may include a sensor (865). The sensor (865) may be disposed on a substrate (870). The sensor (865) may be disposed on an inner surface of the substrate (870). The sensor (865) may be coupled to the substrate (870). The sensor (865) may be disposed within the coil (860). Alternatively, the sensor (865) may be disposed on the outer surface of the coil (860). The sensor (865) may detect the magnet (850). The sensor (865) may be disposed at a position corresponding to the magnet (850). The sensor (865) may overlap the magnet (850). The sensor (865) may overlap the magnet (850) in a direction perpendicular to the optical axis. The sensor (865) may be a Hall sensor. The sensor (865) can detect the magnetic force of the magnet (850). The position of the magnet (850) detected by the sensor (865) can be used for autofocus feedback control. The sensor (865) can detect the position of the holder (830). The sensor (865) can detect the position of the lens.

[0148] In this embodiment, when current is applied to the coil (860), the magnet (850) can move. At this time, the holder (830) can move integrally with the magnet (850). Meanwhile, since the ball (880) guides the movement of the holder (830) in the optical axis direction, when current is applied to the coil (860), the holder (830) can move in the optical axis direction together with the magnet (850). At this time, the lens coupled to the holder (830) moves together, and the auto focus function can be performed as the distance in the optical axis direction between the lens and the image sensor (60) changes.

[0149] Furthermore, the autofocus function can be feedback-controlled in real time by the position of the magnet (850) detected by the sensor (865). Through this, the accuracy of the autofocus function can be improved.

[0150] The lens actuator (800) may include a substrate (870). The substrate (870) may be disposed in a housing (840). The substrate (870) may be disposed on the housing (840). The substrate (870) may be coupled to the housing (840). The substrate (870) may be fixed to the housing (840). The substrate (870) may be adhesively bonded to the housing (840). The substrate (870) may be disposed in a base (810). The substrate (870) may be disposed on the base (810). The substrate (870) may be coupled to the base (810). The substrate (870) may be fixed to the base (810). The substrate (870) may be adhesively bonded to the base (810).

[0151] The substrate (870) may be a flexible printed circuit board (FPCB). The substrate (870) may supply current to the coil (860). The substrate (870) may be electrically connected to the sensor (865). The substrate (870) may include a plurality of terminals. The terminals of the substrate (870) may be coupled to the printed circuit board (50).

[0152] The lens actuator (800) may include a yoke (875). The yoke (875) may be disposed on a fixed portion. The yoke (875) may be disposed on a substrate (870). The yoke (875) may be disposed on an outer surface of the substrate (870). The yoke (875) may be disposed on a housing (840). The yoke (875) may be disposed on a base (810). The yoke (875) may be disposed at a position corresponding to a magnet (850). The yoke (875) may overlap the magnet (850) in a direction perpendicular to the optical axis. An attractive force may be applied between the yoke (875) and the magnet (850). Through this, the ball (880) may be pressed between the holder (830) and the housing (840).

[0153] The lens actuator (800) may include a ball (880). The ball (880) may be disposed between the holder (830) and the housing (840). The ball (880) may be disposed in the holder (830). The ball (880) may come into contact with the holder (830). The ball (880) may move along the holder (830). The ball (880) may move along the groove of the holder (830). The ball (880) may be disposed in the housing (840). The ball (880) may come into contact with the housing (840). The ball (880) may move along the housing (840). The ball (880) may move along the groove of the housing (840). The ball (880) may be disposed between the groove of the holder (830) and the groove of the housing (840). The groove of the holder (830) and the groove of the housing (840) may be rails.

[0154] The ball (880) can guide the movement of the holder (830) in the optical axis direction. The ball (880) can limit the movement of the holder (830) only in the optical axis direction.

[0155] The ball (880) may include a plurality of balls. The ball (880) may include a plurality of balls that overlap in the optical axis direction. The balls (880) may be arranged on both sides of the magnet (850). The ball (880) may include a first ball arranged on one side of the magnet (850) and a second ball arranged on the other side of the magnet (850). Each of the first ball and the second ball may include a plurality of balls that overlap in the optical axis direction.

[0156] The camera device (10) may include a lens module (20). The lens module (20) may include at least one lens. The lens may be positioned corresponding to the image sensor (60). The lens module (20) may include a lens and a barrel. The lens module (20) may be coupled to a holder (830) of a lens driving device (800). The lens module (20) may be coupled to the holder (830) by screw coupling and / or adhesive. The lens module (20) may be moved integrally with the holder (830).

[0157] The camera device (10) may include a filter (30). The filter (30) may block light of a specific frequency band from passing through the lens module (20) from being incident on the image sensor (60). The filter (30) may be arranged parallel to the xy plane. The filter (30) may be arranged between the lens module (20) and the image sensor (60). The filter (30) may be arranged on the sensor base (40). Alternatively, the filter (30) may be arranged on the base (810) of the lens driving device (800). The filter (30) may include an infrared filter. The infrared filter may block light in the infrared region from being incident on the image sensor (60).

[0158] The camera device (10) may include a sensor base (40). The sensor base (40) may be disposed between the lens actuator (800) and the printed circuit board (50). The sensor base (40) may include a protrusion (41) on which a filter (30) is disposed. An opening may be formed in a portion of the sensor base (40) on which the filter (30) is disposed so that light passing through the filter (30) may be incident on the image sensor (60). An adhesive member may couple or adhere the base (810) of the lens actuator (800) to the sensor base (40). The adhesive member may additionally serve to prevent foreign substances from entering the interior of the lens actuator (800). The adhesive member may include at least one of an epoxy, a thermosetting adhesive, and an ultraviolet-curable adhesive.

[0159] The camera device (10) may include a printed circuit board (PCB) (50). The printed circuit board (50) may be a substrate or a circuit board. A lens driving device (800) may be disposed on the printed circuit board (50). A sensor base (40) may be disposed between the printed circuit board (50) and the lens driving device (800). The printed circuit board (50) may be electrically connected to the lens driving device (800). An image sensor (60) may be disposed on the printed circuit board (50). Various circuits, elements, control units, etc. may be provided on the printed circuit board (50) to convert an image formed on the image sensor (60) into an electrical signal and transmit it to an external device.

[0160] The camera device (10) may include an image sensor (60). The image sensor (60) may be configured to form an image by receiving light that has passed through a lens and a filter (30). The image sensor (60) may be mounted on a printed circuit board (50). The image sensor (60) may be electrically connected to the printed circuit board (50). For example, the image sensor (60) may be coupled to the printed circuit board (50) using surface mounting technology (SMT). As another example, the image sensor (60) may be coupled to the printed circuit board (50) using flip chip technology. The image sensor (60) may be arranged such that its optical axis is aligned with that of the lens. That is, the optical axis of the image sensor (60) and the optical axis of the lens may be aligned. The image sensor (60) can convert light irradiated onto the effective image area of ​​the image sensor (60) into an electrical signal. The image sensor (60) can be any one of a CCD (charge coupled device), a MOS (metal oxide semi-conductor), a CPD, and a CID.

[0161] The camera device (10) may include a motion sensor (70). The motion sensor (70) may be mounted on a printed circuit board (50). The motion sensor (70) may be electrically connected to a control unit (80) through a circuit pattern provided on the printed circuit board (50). The motion sensor (70) may output rotational angular velocity information due to the movement of the camera device (10). The motion sensor (70) may include a two-axis or three-axis gyro sensor or an angular velocity sensor.

[0162] The camera device (10) may include a control unit (80). The control unit (80) may be disposed on a printed circuit board (50). The control unit (80) may be electrically connected to a coil (860) of a lens driving device (800). The control unit (80) may individually control the direction, intensity, amplitude, etc. of the current supplied to the coil (860). The control unit (80) may control the lens driving device (800) to perform an autofocus function and / or a shake correction function. Furthermore, the control unit (80) may perform autofocus feedback control and / or shake correction feedback control for the lens driving device (800). The control unit (80) may control an aperture device (10A). The control unit (80) may control a current applied to a coil of the aperture device (10A).

[0163] The camera device (10) may include a connector (90). The connector (90) may be electrically connected to a printed circuit board (50). The connector (90) may include a port for electrically connecting to an external device.

[0164]

[0165] Below, the configuration of the optical device according to the present embodiment is described with reference to the drawings.

[0166] Figure 24 is a perspective view of an optical device according to the present invention.

[0167] The optical device (1) may include one or more of a mobile phone, a cell phone, a portable terminal, a mobile terminal, a smart phone, a smart pad, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistant), a PMP (Portable Multimedia Player), and a navigation device. The optical device (1) may include any device for taking images or photographs.

[0168] An optical device (1) may include a main body (2). The optical device (1) may include a camera device (10). The camera device (10) may be disposed on the main body (2). The camera device (10) may photograph a subject. The optical device (1) may include a display. The display may be disposed on the main body (2). The display may output one or more of a video or image captured by the camera device (10). The display may be disposed on a first surface of the main body (2). The camera device (10) may be disposed on one or more of the first surface of the main body (2) and a second surface opposite the first surface. The camera device (10) may have a triple camera disposed in a vertical direction. Alternatively, the camera device (10) may have a triple camera disposed in a horizontal direction.

[0169]

[0170] Although the embodiments of the present invention have been described with reference to the attached drawings, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering the technical concept or essential features thereof. Therefore, the embodiments described above should be understood to be illustrative in all respects and not restrictive.

Claims

1. Base; A rotor placed on the above base; A magnet placed on the above rotor; a coil interacting with the magnet; and including a ball disposed between the base and the rotor, The above rotor includes a stopper that overlaps the base in a circumferential direction centered on the optical axis, The above stopper is an aperture device that overlaps the ball in the radial direction.

2. In paragraph 1, An aperture device in which the lower end of the stopper is positioned higher than the lower end of the ball.

3. In paragraph 1, The above stopper is an aperture device that comes into contact with the base when the rotor rotates.

4. In paragraph 1, The above stopper includes a stopping surface that comes into contact with the base, The above base includes a stopping surface that contacts the stopping surface of the above stopper, An aperture device in which the stopping surface of the stopper and the stopping surface of the base are planes parallel to each other.

5. In paragraph 1, The above rotor includes a magnet receiving portion in which the magnet is placed, An aperture device in which the magnet receiving portion of the rotor is spaced apart from the base when the rotor rotates and the stopper of the rotor comes into contact with the base.

6. In paragraph 5, The above base includes an inclined surface that overlaps and directly faces the magnet receiving portion in the circumferential direction, An aperture device in which at least a portion of the inclined surface of the base is arranged to be inclined with respect to the facing surface of the magnet receiving portion.

7. In paragraph 5, The stopper of the rotor includes first to fourth stoppers spaced apart from each other, An aperture device in which the magnet receiving portion of the rotor includes a first magnet receiving portion arranged between the second stopper and the third stopper, and a second magnet receiving portion arranged between the first stopper and the fourth stopper.

8. In paragraph 1, Including a substrate placed on the above base, The above coil is placed on the inner surface of the above substrate, An aperture device in which a second stiffener is arranged at a position corresponding to the coil on the outer surface of the above substrate.

9. In paragraph 1, The above base includes a first yoke arranged to overlap the coil in the circumferential direction, An aperture device in which an attractive force acts between the first yoke and the magnet.

10. In paragraph 1, A second yoke is disposed on the above base and includes a magnet and a second yoke on which the magnet and the second yoke act, An aperture device that presses the ball toward the base by the attractive force between the magnet and the second yoke.

Images