Actuator for camera, camera module, and imaging device

Abstract

Provided is an actuator for a camera, which can facilitate assembly of a high thrust VCM actuator. An actuator for a camera according to one embodiment of the present invention comprises: a plurality of magnets arranged; a fixing member; the movable part can move relative to the fixed part; and a coil. One of the fixed part and the movable part is a support member that supports the plurality of magnets. The coil is supported by the other of the fixed member and the movable member to face the plurality of magnets. The plurality of magnets has two magnets, and the two magnets have poles on a surface opposite to the coil. The support member has an abutment portion that abuts end portions of opposing faces of the two magnets.

Description

[0001] This application is a divisional application. The application number of the original application is 202380053301.8, and the original application date is September 15, 2023. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present invention relates to an actuator for a camera, and more particularly, to an actuator for driving a camera module, an optical system or an imaging sensor for an autofocus function or an optical image stabilization function, and the camera module and an imaging device having the actuator. Background Art

[0003] In recent years, imaging sensors and lenses have become larger in many camera modules installed in portable devices such as smartphones and tablets or other cameras. As a result, the weight of the optical components driven for autofocus and optical image stabilization has continued to increase. Actuators require high power to drive weighted optical components.

[0004] Voice coil motor (VCM) is widely used as an actuator for autofocus and optical image stabilization. VCM is mainly composed of a magnet, a coil, and a yoke. It is a single-phase motor that is positioned by a magnetic field generated by the flow of direct current (DC). VCM is characterized by light weight and fast response speed. However, in order to make the VCM have high power, the size of the magnet or coil needs to be increased, which will cause the size of the camera module to increase. Therefore, there is a need for an actuator that can have higher output without increasing the size of the actuator.

[0005] As a method of making a VCM have high power without changing the size of the magnet or coil, it is known to use magnets to form an array such as a Halbach array. However, this method is difficult to assemble an actuator because there are attractive and repulsive forces between the magnets when the magnets are arranged. Therefore, it is necessary to facilitate the assembly of an actuator capable of having a higher output without increasing the size of the actuator. Summary of the invention

[0006] The present invention is to facilitate the assembly of a high-thrust VCM actuator.

[0007] According to a first aspect of the present invention, there is provided an actuator for a camera, the actuator comprising:

[0008] a plurality of magnets arranged;

[0009] Fixed parts;

[0010] a movable part, movable relative to the fixed part;

[0011] Coil,

[0012] One of the fixed part and the movable part is a supporting member that supports the plurality of magnets, wherein the coil is supported by the other of the fixed part and the movable part to face the plurality of magnets, wherein the plurality of magnets has two magnets having poles on a surface opposite to the coil, and wherein the supporting member has an abutting portion that abuts ends of opposing surfaces of the two magnets.

[0013] According to the first aspect, in order to assemble the magnets of the arrangement, two or more magnets having different polarities on the surface facing the coil are initially inserted into the support member. At this time, by having the support member with abutting portions between the magnets, the distance between the magnets can be maintained even if the attractive forces interact.

[0014] According to a second aspect of the present invention, there is provided an actuator for a camera, the actuator comprising:

[0015] a plurality of magnets arranged;

[0016] Fixed parts;

[0017] a movable part, movable relative to the fixed part;

[0018] Coil,

[0019] One of the fixed part and the movable part is a supporting member that supports the plurality of magnets, the coil is supported by the other of the fixed part and the movable part to face the plurality of magnets, the plurality of magnets have at least one magnet that is magnetized along an array direction of the plurality of magnets, and the supporting member has an adjacent portion that is adjacent to ends of the at least one magnet on both sides perpendicular to the array direction.

[0020] According to the second aspect, the magnets magnetized in the array direction are first inserted to assemble the array magnet. Thereafter, the plurality of magnets whose surfaces opposite to the coils are N poles or S poles are inserted into the support member. The support member has abutment portions on both sides of the magnets magnetized in the array direction. Therefore, the position of the magnets inserted first can be maintained, facilitating the subsequent insertion of the magnets.

[0021] According to a possible implementation manner of the first aspect or the second aspect, the plurality of magnets are arranged in a Halbach array.

[0022] According to this implementation, the magnets arranged in the Halbach array can be easily inserted into the supporting member.

[0023] According to a possible implementation manner of the first aspect or the second aspect, a spacing between two adjacent portions of the adjacent portions is greater than or equal to a width of a magnet, and the magnet is inserted between two magnets of the plurality of magnets.

[0024] According to this implementation, the interval of the abutting portions is larger than the width of the magnets magnetized along the array direction, making it easier to insert the magnets into the supporting member.

[0025] According to a possible implementation manner of the first aspect or the second aspect, the support member is provided with a magnetic substance on a surface of the plurality of magnets, the surface is opposite to another surface of the magnets, and the other surface is opposite to the coil.

[0026] According to this implementation, when the magnet is inserted into the supporting member, the magnet is attracted by the magnetic substance, so that the magnet can be easily inserted into the supporting member.

[0027] According to a possible implementation manner of the first aspect or the second aspect, the supporting member has a member adjacent to the outermost side along an array direction of the plurality of magnets.

[0028] According to this implementation, when the plurality of magnets are sequentially inserted into the supporting member, the previously inserted magnet can be suppressed from rotating, and the subsequent magnet can be easily inserted into the supporting member.

[0029] According to a possible implementation manner of the first aspect or the second aspect, the adjacent portion is made of resin.

[0030] According to this implementation, it is possible to configure the actuator using the supporting member composed of resin.

[0031] According to a possible implementation manner of the first aspect or the second aspect, the adjacent portion is made of metal.

[0032] According to this implementation, it is possible to configure an actuator using a support member composed of metal.

[0033] According to a possible implementation manner of the first aspect, two magnets among the plurality of magnets are non-adjacent magnets, and the non-adjacent magnets have different polarities on a surface opposite to the coil.

[0034] According to this implementation, in order to assemble the magnets of the arrangement, non-adjacent magnets having different polarities on the surface opposite to the coil are initially inserted into the support member. At this time, by the support member having abutting portions between the magnets, the distance between the magnets can be maintained even if the attractive forces of the magnets interact with each other.

[0035] According to a third aspect of the present invention, there is provided an actuator for a camera, the actuator for a camera comprising:

[0036] Coil;

[0037] a plurality of magnets magnetized at a predetermined angle relative to a direction perpendicular to a surface opposite to the coil;

[0038] Fixed parts;

[0039] a movable part, movable relative to the fixed part,

[0040] One of the fixed part and the movable part is a supporting member that supports the plurality of magnets, the coil is supported by the other of the fixed part and the movable part to face the plurality of magnets, and the supporting member has an abutting portion that abuts ends of a pair of non-adjacent magnets, and the pair of non-adjacent magnets have different polarities on a surface facing the coil.

[0041] According to this aspect, a pair of non-adjacent magnets having different polarities on the surface opposite to the coil is initially inserted into the support member. Then, the remaining magnets are inserted into the support member so as to be adjacent to the pair of magnets. In this case, since the support member has the abutment portion, the position of the previously inserted pair of magnets can be maintained. Therefore, the insertion of the magnets is facilitated.

[0042] According to a possible implementation manner of the third aspect, a spacing between two of the adjacent portions is greater than or equal to a width of a pair of adjacent magnets, and the pair of adjacent magnets have different polarities on a surface facing the coil.

[0043] According to a possible implementation manner of the third aspect, the support member is provided with a magnetic substance on a surface of the plurality of magnets, the surface is opposite to another surface of the magnets, and the other surface is opposite to the coil.

[0044] According to a possible implementation manner of the third aspect, the supporting member includes a member adjacent to ends of the plurality of magnets along an array direction.

[0045] According to a possible implementation manner of the third aspect, the adjacent portion is made of resin.

[0046] According to a possible implementation manner of the third aspect, the adjacent portion is made of metal.

[0047] According to a fourth aspect of the present invention, there is provided an actuator for a camera, the actuator for a camera comprising:

[0048] Coil;

[0049] a plurality of magnets magnetized at a predetermined angle relative to a direction perpendicular to a surface opposite to the coil;

[0050] Fixed parts;

[0051] a movable part, movable relative to the fixed part,

[0052] One of the fixed part and the movable part is a supporting member which supports the plurality of magnets, wherein the coil is supported by the other of the fixed part and the movable part to face the plurality of magnets, and wherein the supporting member has an abutting portion which abuts ends of a pair of adjacent magnets, and wherein the pair of adjacent magnets have different polarities on a surface facing the coil.

[0053] According to this aspect, a pair of adjacent magnets having different polarities on the surface opposite to the coil is initially inserted into the support member. Then, the remaining magnets are inserted into the support member so as to be adjacent to the pair of magnets. In this case, since the support member has the abutment portion, the position of the previously inserted pair of magnets can be maintained. Therefore, the insertion of the magnets is facilitated.

[0054] According to a possible implementation manner of the fourth aspect, a spacing between two of the adjacent portions is greater than or equal to a width of the pair of adjacent magnets.

[0055] According to a possible implementation manner of the fourth aspect, the support member is provided with a magnetic substance on a surface of the plurality of magnets, the surface is opposite to another surface of the magnets, and the other surface is opposite to the coil.

[0056] According to a possible implementation manner of the fourth aspect, the supporting member includes a member adjacent to ends of the plurality of magnets along an array direction.

[0057] According to a possible implementation manner of the fourth aspect, the adjacent portion is made of resin.

[0058] According to a possible implementation manner of the fourth aspect, the adjacent portion is made of metal.

[0059] According to a possible implementation of any one of the first to fourth aspects, the magnet that is not adjacent to the adjacent portion has a notch at its end, wherein the support member has an engagement portion that engages with the notch, and the adjacent portion is arranged in the engagement portion.

[0060] According to this implementation, since the magnets have the abutment portions, even if the magnets attract each other, the distance between the magnets can be maintained.

[0061] According to a fifth aspect, there is provided a camera module having the actuator for a camera as described above.

[0062] According to a sixth aspect, there is provided an imaging device having the actuator for a camera as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions in the embodiments, the following briefly introduces the drawings required for these embodiments. Obviously, the drawings in the following description only depict some possible embodiments, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, among which:

[0064] Figure 1 shows a basic configuration of a camera module to which an actuator according to an embodiment is applied;

[0065] Figure 2 shows an exploded perspective view of an actuator according to one embodiment;

[0066] Figure 3 shows a side cross-sectional view of an actuator according to one embodiment;

[0067] Figure 4 Schematic diagrams showing magnet arrays, wherein (a) shows magnetic field lines formed by a conventional magnet array, and (b) shows magnetic field lines formed by magnets arranged in a Halbach array;

[0068] Figure 5A shows a cross-sectional view of an exemplary actuator;

[0069] Figure 5B shows a cross-sectional view of an exemplary actuator;

[0070] Figure 5C shows a cross-sectional view of an exemplary actuator;

[0071] Figure 6 1 is a top view of a fixing member and a magnet according to an embodiment, wherein (a) shows a top view including all magnets, and (b) shows an enlarged view of a portion of (a);

[0072] Figure 7 is a diagram showing a process of inserting a magnet into a fixing member;

[0073] Figure 8 is a diagram showing the relationship between the interval between two adjacent portions provided in the fixing member and the width of the center magnet;

[0074] Fig. 9 2 are diagrams showing the operation of embedding a magnetic substance in a fixing member, wherein (a) shows a state where two magnets are inserted into the fixing member, and (b) shows the insertion of a center magnet;

[0075] Fig.10 is a diagram illustrating the operation of a side support member included in the fixing member;

[0076] Fig.11 1 are diagrams showing examples of the form of a fixing member for an actuator, wherein (a) shows an external perspective view, and (b) shows a perspective view of the fixing member in which a magnet is installed;

[0077] Fig.12 shows an exploded perspective view of an actuator according to one embodiment;

[0078] Fig.13 shows a top view of a portion of a stationary component of an actuator;

[0079] Fig.14 is a diagram showing a process of inserting a magnet into a fixing member;

[0080] Fig.15 shows a diagram showing the relationship between the interval of two abutting portions provided in the fixing member and the width of the center magnet;

[0081] Fig.16 2 are diagrams showing the operation of embedding a magnetic substance in a fixing member, wherein (a) shows a state where a central magnet is inserted, and (b) shows the insertion of two magnets;

[0082] Fig.17 is a diagram illustrating the operation of a side support member included in a fixing part;

[0083] Fig.18 : are diagrams showing examples of the form of a fixing member, wherein (a) shows an external perspective view, and (b) shows a perspective view of the fixing member in which a magnet is installed;

[0084] Fig.19 shows an exploded perspective view of an actuator according to one embodiment;

[0085] Fig. 20 shows a side cross-sectional view of an actuator according to one embodiment;

[0086] Fig.21 1. A top view of a fixing member and a magnet according to an embodiment is shown, wherein (a) shows a top view including all magnets, and (b) shows an enlarged view of a portion of (a);

[0087] Fig. 22 is a diagram showing a process of inserting a magnet into a fixing member;

[0088] Fig.23 shows a diagram showing the relationship between the interval of two abutting portions provided in the fixing member and the width of the center magnet;

[0089] Fig.24 2 are diagrams showing the operation of embedding a magnetic substance in a fixed component, wherein (a) shows a pair of central magnets being inserted, and (b) shows the insertion of the remaining two magnets;

[0090] Fig.25 is a diagram illustrating the operation of a side support member included in the fixing member;

[0091] Fig.26 : are diagrams showing examples of the form of a fixing member, wherein (a) shows an external perspective view, and (b) shows a perspective view of the fixing member in which a magnet is installed;

[0092] Fig. 27 shows an exploded perspective view of an actuator according to one embodiment;

[0093] Fig.28 1. A top view of a fixing member and a magnet according to an embodiment is shown, wherein (a) shows a top view including all magnets, and (b) shows an enlarged view of a portion of (a);

[0094] Fig.29 is a diagram showing a process of inserting a magnet into a fixing member;

[0095] Fig.30 is a diagram showing the relationship between the interval between two adjacent portions provided in the fixing member and the width of the center magnet;

[0096] Fig.31 2 are diagrams showing the operation of embedding a magnetic substance in a fixed component, wherein (a) shows a pair of central magnets being inserted, and (b) shows the insertion of the remaining two magnets;

[0097] Fig.32 is a diagram illustrating the operation of a side support member included in the fixing member;

[0098] Fig.33 : are diagrams showing examples of the form of a fixing member, wherein (a) shows an external perspective view, and (b) shows a perspective view of the fixing member in which a magnet is installed;

[0099] Fig.34 1 is a diagram showing a fixing member according to an embodiment, wherein (a) shows a top view of a portion of an end portion in which a magnet is mounted, (b) shows a top view including the magnet, and (c) shows a cross-sectional view taken along line AA;

[0100] Fig.35 1 is a diagram showing a fixing member according to an embodiment, wherein (a) shows a top view of a portion of an end portion in which a magnet is mounted, (b) shows a top view including the magnet, (c) shows a cross-sectional view along line AA, and (d) and (e) show the ends of the magnet;

[0101] Fig.36 1 is a diagram showing a fixing member according to an embodiment, wherein (a) shows a top view of a portion of an end portion in which a magnet is mounted, (b) shows a top view including the magnet, and (c) shows a cross-sectional view taken along line AA;

[0102] Fig.37 2 are diagrams showing a fixing component according to one embodiment, wherein (a) shows a top view of a portion of an end in which a magnet is assembled, (b) shows a top view including the magnet, (c) shows a cross-sectional view of line AA, and (d) and (e) show the ends of the magnet. DETAILED DESCRIPTION

[0103] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the mode of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0104] Figure 1 : is a diagram showing a basic configuration of a camera module to which an actuator according to an embodiment of the present invention is applied. Although a module tilt OIS system that moves or rotates a camera module is described below, the present invention is also applicable to a lens shift system that moves a lens and a sensor shift system that moves an imaging sensor.

[0105] The camera module 100 is mounted on an imaging device, which includes a portable device such as a smartphone or a tablet computer or other cameras.

[0106] The camera module 100 is movably supported relative to the main body of the imaging device and can be independently moved in the X-axis direction (a direction perpendicular to the surface of the paper) and the Y-axis direction (a longitudinal direction of the paper).

[0107] The camera module 100 includes a lens 102 , an image sensor 110 , an actuator 104 , a control unit 106 , a position detector 108 , an analog front end (AFE) 112 , and a motion sensor 120 .

[0108] The lens 102 is provided on an incident light path of the image sensor 110 to guide subject light to the image sensor 110. The lens 102 is held by a lens holder 103. The lens holder 103 is arranged to be movable in the Z-axis direction (optical axis direction).

[0109] The image sensor 110 is composed of an imaging sensor that performs photoelectric conversion on the subject light to output a signal related to the captured image. For example, the image sensor 110 may be a complementary metal oxide semiconductor (CMOS) sensor. The AFE 112 converts the analog signal output from the image sensor 110 into a digital signal and outputs it to the control unit 106. The actuator 104 is a VCM actuator for moving the camera module 100 and the lens holder 103. As described above, the camera module 100 can be independently moved in the X-axis direction and the Y-axis direction, so the actuator 104 is used to independently move the camera module 100 in the X-axis direction and the Y-axis direction to achieve optical image stabilization. The actuator 104 is also used to move the lens 102 in the Z-axis direction to achieve autofocus.

[0110] The motion sensor 120 is used to detect the motion of the camera module 100. For example, the motion sensor 120 may be a gyro sensor. The motion sensor 120 outputs a motion signal indicating the detected motion of the camera module 100.

[0111] The position detector 108 is used to position the camera module 100. The position detection unit 108 may be a magnetic detection element such as a Hall sensor. In this case, the magnetic detection element outputs a position detection signal indicating the displacement of the camera module 100.

[0112] The control unit 106 has an actuator driver 114, an image processing circuit 116, and an encoder 118. The actuator driver 114 controls the actuator 104 to move the optical member. The optical member to be moved may include the camera module 100, the lens holder 103, the image sensor 110, and the like.

[0113] The actuator driver 114 sends a signal to the actuator 104 to implement optical image stabilization. The actuator driver 114 controls the movement of the camera module 100 based on the motion signal from the motion sensor 120. For example, when a gyro sensor is used as the motion sensor 120, the motion signal indicates the angular velocity in the yaw direction (X-axis direction) and the angular velocity in the pitch direction (Y-axis direction). The actuator driver 114 calculates the displacement of the angle by integrating the motion signals in the yaw direction and the pitch direction respectively. Then, the actuator driver 114 displaces the camera module 100 in response to the calculated angular displacement.

[0114] Furthermore, in autofocus, the actuator driver 114 may control the movement of the lens 102 in response to the contrast of the image output from the image processing circuit 116. For example, the actuator driver 114 controls the actuator 104 to move the lens 102 along the optical axis direction (Z-axis direction) so as to maximize the contrast of the image output from the image processing circuit 116.

[0115] The image processing circuit 116 performs predetermined processing on the signal output by the AFE 112 to output an image signal in a digital format. The encoder converts the output image data in a digital format into output image data in an analog format. The output image data is sent to the display 122. The display 122 displays an image based on the image signal received from the encoder 118, and may be, for example, a liquid crystal display (LCD).

[0116] In an embodiment, Figure 1 As shown, the camera module 100 applies an optical image stabilization system, but the camera module 100 may be adaptively designed according to an object to be corrected. For example, if the camera module 100 applies a lens shift optical image stabilization system that moves the lens, the lens 102 is movably supported in the X direction and the Y direction. The position detector 108 detects the position of the lens 102, and the motion sensor 120 detects the movement of the lens 102. In addition, when the camera module 100 applies a sensor shift optical image stabilization system that moves the image sensor, the image sensor 110 is movably supported in the X direction and the Y direction. The position detection unit 108 detects the position of the image sensor 110, and the motion sensor 120 detects the movement of the image sensor 110.

[0117] (First embodiment)

[0118] Reference now Figure 2 and Figure 3 , wherein the configuration of the actuator 104 according to the first embodiment of the present invention will be described.

[0119] Figure 2 is an exploded perspective view of the actuator 104, Figure 3 204a, 204b, 204c, a coil 203, and a movable part 202. The fixed part 205 is a supporting member that supports the magnets 204a-204c. The fixed part 205 is made of a resin such as a super engineering plastic or a liquid crystal polymer, and is formed in a plate shape. The fixed part 205 has an opening 208 at a center position, and the magnets 204a-204c are assembled in the opening. The movable part 202 is made of a resin such as a super engineering plastic or a liquid crystal polymer, and is formed in a plate shape. The coil 203 is fixed to the bottom of the movable part 202.

[0120] The magnetic substance 206 is embedded in the fixing member 205. The magnetic substance 206 is made of iron or the like, and is exposed at the opening 208.

[0121] In this embodiment, the component connected to the magnet is a fixed component, and the component connected to the coil is a movable component. On the contrary, the component connected to the magnet can be a movable component, and the component connected to the coil can be a fixed component.

[0122] Now combine Figure 4 The arrangement of the magnets used in this embodiment is described. Figure 4 (a) in FIG. 1 shows the magnetic field lines formed by a conventional two-magnet array. Figure 4 In (a), the magnet on the left has a north (N) pole at the top, and the magnet on the right has an N pole at the bottom. In such a magnet array, the magnetic field extends symmetrically to the upper and lower sides, as shown by arrow F1.

[0123] On the other hand, the magnets 204a-204c are arranged in a Halbach array. In the Halbach array, the north pole and the south (S) pole of the magnet are arranged side by side with a 90 degree change in orientation. Figure 4 (b) in FIG. 1 shows the magnetic field lines formed by the magnets arranged in a Halbach array. The N pole of the left magnet is located on the upper side, the N pole of the middle magnet is located on the left side, and the N pole of the right magnet is located on the lower side. By arranging the magnets in this way, the magnetic field can be concentrated on the upper side of the magnets, and the magnetic force can be enhanced, as shown by arrow F2. Therefore, Figure 3As shown, when the magnets 204a - 204c of the actuator 104 are arranged in a Halbach array, the output of the actuator 104 can be increased by positioning the coil 203 at a position opposite to the upper surface of the magnets.

[0124] Now combine FIG. 5A to FIG. 5C Some example implementations of actuators are described.

[0125] Figure 5A 2 is a cross-sectional view of an exemplary actuator for realizing an optical image stabilization function. The camera module 100 is fixed to the movable part 202 so that the direction from the magnets 204a–204c toward the coil 203 is parallel to the optical axis direction of the lens 102. In some embodiments, the housing of the camera module 100 can be formed integrally with the movable part 202. The movable part 202 is retained in the body of the imaging device so that it can move parallel to the surface of the coil 203. For example, the position detector 108 can be disposed inside the coil 203. The position detection unit 108 detects the position of the camera module 100 and outputs it to the actuator driver 114.

[0126] The actuator driver 114 is a control part for moving the movable part 202 relative to the fixed part 205 by supplying power to the coil 203. The actuator driver 114 controls the current flowing to the coil 203 based on the motion signal from the motion sensor 120 and the position signal of the camera module 100 output from the position detector 108. When the current flows into the coil 203 and the coil 203 generates a magnetic field, the coil 203 applies a force between the magnets 204a-204c placed oppositely. This force moves the movable part 202 in a plane parallel to the fixed part 205.

[0127] Figure 5B 2 is a cross-sectional view of an exemplary actuator for realizing an autofocus function. The lens holder 103 is fixed to the movable part 202 so that the direction from the magnets 204a-204c to the coil 203 is perpendicular to the optical axis direction of the lens 102. In some embodiments, the lens holder 103 can be formed integrally with the movable part 202. When receiving an image signal output from the image processing circuit 116, the actuator driver 114 generates the movement amount of the lens 102 according to the contrast of the generated image. In addition, the actuator driver 114 controls the current flowing to the coil 203 based on the movement amount of the lens 102 and the position signal of the lens 102 output from the position detector 108.

[0128] Figure 5C2 is a cross-sectional view of another exemplary actuator that realizes the optical image stabilization function. The image sensor 110 is fixed to the movable part 202 so that the direction from the magnets 204a-204c to the coil 203 is perpendicular to the light receiving surface of the image sensor 110. The position detection unit 108 detects the position of the image sensor 110 and outputs it to the actuator driver 114. The actuator driver 114 controls the current flowing to the coil 203 based on the motion signal from the motion sensor 120 and the position signal of the image sensor 110 output from the position detector 108.

[0129] Reference again Figure 4 In (b), in the Halbach array, the N pole of the left magnet contacts the N pole of the center magnet, and the S pole of the right magnet contacts the S pole of the center magnet. Therefore, it is difficult to assemble the Halbach array because of the repulsive force between adjacent magnets. Therefore, this embodiment provides a high-thrust VCM actuator that is easy to assemble without increasing the size of the magnet or coil.

[0130] Figure 6 Top views of the fixing component and the magnet according to the present embodiment are shown, wherein (a) shows a top view including the entire magnet, and (b) shows an enlarged view of the end of the magnet. The N pole of the magnet 204a is located on the top surface (i.e., the surface facing the coil 203), and the S pole of the magnet 204c is located on the top surface. In addition, the N pole of the magnet 204b is located on the left side, and the S pole is located on the right side. The length of the magnet 204b is slightly shorter than that of the magnets 204a and 204c. The fixing component 205 as a supporting member has adjacent portions C1 and C2 at the ends of the surfaces where the two magnets 204a and 204c meet. Although Figure 6 Only the abutting portion abutting one end of the magnets 204a, 204c is shown, but the fixing member 205 also has other abutting portions abutting the other end.

[0131] refer to Figure 7, wherein a method for inserting magnets 204a-204c into a fixing member 205 will be described. First, as shown in (a), the fixing member 205 is set so that the opening 208 faces upward. Then, as shown in (b), two magnets 204a, 204c are inserted. Here, an attractive force acts on the inserted magnets 204a, 204c. However, as shown in (c), due to the presence of adjacent portions C1, C2 in the fixing member 205, the magnets 204a, 204c are prevented from attracting each other. Then, as shown in (d), the magnet 204b is inserted between the magnets 204a, 204c. When the magnet 204b is inserted, the guide members 702a, 702b are preferably positioned to guide the insertion of the magnet 204b. The guide members 702a, 702b are made of resin or the like and are arranged to hold the two magnets 204a, 204c from above. In this manner, when the magnet 204b approaches the magnets 204a, 204c, the magnets 204a, 204c may be prevented from rotating by attraction or repulsion.

[0132] According to the present embodiment, two or more magnets 204a, 204c having different polarities on the surface facing the coil 203 are initially inserted in the support member to assemble the magnets in a Halbach array. At this time, the fixing part 205 has adjacent portions C1 and C2 between the magnets, so that the distance between the magnets can be maintained even if the magnets are attracted. In addition, it becomes easy to insert the magnet 204b magnetized in the array direction between the magnets 204a, 204c. In addition, when inserting the magnet 204b magnetized in the array direction, the surface side of the previously inserted magnets 204a, 204c facing the coil 203 is pressed by a clamp or the like. Therefore, it becomes easier to insert the magnet 204b magnetized in the array direction.

[0133] Figure 8 204a, 204c. The diagram shows the relationship between the interval between the two adjacent portions provided in the fixing member 205 and the width of the central magnet 204b. Since the fixing member 205 is provided with two adjacent portions C1, C2, it is formed into a convex shape. The interval A between the two adjacent portions C1, C2 is greater than or equal to the width B of the magnet 204b inserted between the two magnets 204a, 204c. Forming the interval between the magnets 204a, 204c in this way facilitates the insertion of the magnet 204b between the magnets 204a, 204b, as shown in FIG. Figure 7 As shown in (d) in .

[0134] Fig. 9205 is a diagram showing the operation of the magnetic substance 206 embedded in the fixing part 205. The magnetic substance 206 is exposed at the opening 208. As shown in (a), when the magnets 204a, 204c are inserted into the opening 208, the magnets 204a, 204c are attracted in the direction of the arrow. Therefore, the magnets 204a, 204c can be easily inserted into the opening 208. Similarly, as shown in (b), when the magnet 204b is inserted into the opening 208, the magnet 204b is attracted in the direction of the arrow. Therefore, the magnet 204b can be easily inserted into the opening 208.

[0135] Fig.10 FIG. 2 shows a cross-sectional view of the fixing member 205. The fixing member 205 has side support members 205a, 205b adjacent to the outermost sides along the array direction of the plurality of magnets 204a, 204b, 204c. Fig.10 As shown, in the case where two magnets 204a and 204c are arranged in the fixing member 205, when approaching the magnet 204b from above, the N pole of the magnet 204a and the N pole of the magnet 204b are repelled, and a force that causes the magnet 204a to rotate counterclockwise as shown by the arrow A1 acts. In addition, the S pole of the magnet 204b and the S pole of the magnet 204c are repelled, and a force that causes the magnet 204c to rotate clockwise as shown by the arrow A2 acts. Therefore, by providing the side support members 205a and 205b, the magnets 204a and 204c assembled in the fixing member 205 can be prevented from rotating.

[0136] Reference now Fig.11 , wherein another form of a fixing member used in the actuator 104 will be described. Fig.11 The fixing part 1105 shown in (a) can be made of metal, preferably made of magnetic material such as iron. The fixing part 1105 includes a plate-like member 1106 and magnet supporting parts 1102a, 1102b, 1102c, 1102d, 1102e, 1102f.

[0137] Fig.11(b) in the figure shows a fixing component 1105 on which magnets 204a–204c are mounted. Magnet support components 1102a, 1102b, 1102d, 1102e serve as the outermost side support components in the array direction supporting magnets 204a, 204b, 204c. Magnet support component 1102c supports the central magnet 204b and has adjacent portions C3 and C4 adjacent to the ends of the surfaces of the two magnets 204a and 204c facing each other. In addition, magnet support component 1102f supports the central magnet 204b and has adjacent portions C1 and C2 adjacent to the ends of the surfaces of the two magnets 204a and 204c facing each other. In this way, by configuring the fixing component 1105 to be made of metal, the size of the fixing component can be reduced.

[0138] (Second embodiment)

[0139] Reference now Fig.12 and Fig.13 , wherein the configuration of an actuator according to a second embodiment of the present invention will be described.

[0140] Fig.12 is an exploded perspective view of the actuator 1214, Fig.13 is a top view of a portion of the fixed component of the actuator 1214. The actuator 1214 can be used to replace Figure 1 The actuator 104 of FIG. 101 includes a fixed part 1205, a magnetic substance 206, magnets 1204a, 1204b, 1204c, a coil 203, and a movable part 202. The fixed part 1205 is a supporting member that supports the magnets 1204a-1204c. The fixed part 1205 has an opening 1208 at a central position, and the magnets 1204a-1204c are assembled in the opening.

[0141] The magnets 1204a-1204c are arranged in a Halbach array. Fig.13 In the Halbach array shown, three magnets are arranged. The N pole of the left magnet 1204a is located on the upper side, the N pole of the middle magnet 1204b is located on the left side, and the N pole of the right magnet 1204c is located on the lower side. Magnet 1204b is the magnet magnetized along the array direction among the three magnets, and is slightly longer than magnets 1204a and 1204c. The fixing part 1205 as a supporting member has adjacent parts C11 and C12, which are adjacent to the ends of one magnet 1204b on both sides perpendicular to the array direction of magnet 1204b.

[0142] refer to Fig.14, wherein a method for inserting magnets 1204a–1204c into a fixing component 1205 will be described. First, as shown in (a), the fixing component 1205 is set so that the opening 1208 faces upward. Then, as shown in (b), the magnet 1204b is inserted. Here, as shown in (c), the magnet 1204b is fixed due to the presence of adjacent portions C11 and C12 in the fixing component 205. Then, as shown in (d), the magnets 1204a and 1204c are inserted into both sides of the magnet 1204b. When inserting the magnets 1204a and 1204c, it is preferred to position the guide member 1402 to guide the insertion of the magnets 1204a and 1204c. The guide member 1402 is made of a resin or the like and is arranged to hold the magnet 1204b from above. In this manner, when the magnets 1204a, 1204c are in proximity to the magnet 204b, the magnets 1204a, 1204c may be prevented from rotating by an attractive force or a repulsive force.

[0143] Fig.15 1 is a diagram showing the relationship between the interval between two adjacent portions provided in the fixing member 1205 and the width of the central magnet 1204b. Since the fixing member 1205 is provided with two adjacent portions C11, C12, it is formed into a convex shape. The interval A between the two adjacent portions C11, C12 is greater than or equal to the width B of the magnet 1204b. Forming a gap between the magnets in this way facilitates the insertion of the magnet 1204b into the fixing member 1205, as shown in FIG. Fig.14 As shown in (d) in .

[0144] According to an embodiment of the present invention, the magnet 1204b magnetized along the array direction is first inserted to assemble the magnets in a Halbach array. Thereafter, the magnets 1204a and 1204c whose surfaces opposite to the coil 203 are N poles or S poles are inserted. Since the fixing member 1205 has adjacent portions C11 and C12 on both sides of the magnet 1204b magnetized along the array direction, the position of the magnet 1204b can be maintained. Therefore, it becomes easier to insert the magnets 1204a and 1204c. In addition, when the magnets 1204a and 1204c whose surfaces opposite to the coil 203 are N poles or S poles are inserted, the surface of the previously inserted magnet 1204b facing the coil 203 is pressed by a clamp or the like. Therefore, it becomes easier to insert a plurality of magnets 1204a and 1204c whose surfaces opposite to the coil 203 are N poles or S poles.

[0145] Fig.1612 is a diagram showing the operation of the magnetic substance 206 embedded in the fixed part 1205. The magnetic substance 206 is exposed at the opening 1208. As shown in (a), when the magnet 1204b is inserted into the opening 1208, the magnet 1204b is attracted in the direction of the arrow. Therefore, the magnet 1204b can be easily inserted into the opening 1208. Similarly, as shown in (b), when the magnets 1204a and 1204c are inserted into the opening 1208, the magnets 1204a and 1204c are attracted in the direction of the arrow. Therefore, the magnets 1204a and 1204c can be easily inserted into the opening 1208.

[0146] Fig.17 A cross-sectional view of the fixing part 1205 is shown. The fixing part 1205 has side support parts 1705a, 1705b adjacent to the outermost side along the array direction of the plurality of magnets 1204a-1204c. In the case where the magnet 1204b is arranged in the fixing part 1205, when approaching the magnets 1204a, 1204c from above, the N pole of the magnet 1204a and the N pole of the magnet 1204b are repelled, and a force that causes the magnet 1204a to rotate counterclockwise as shown by the arrow A3 acts. In addition, the S pole of the magnet 1204b and the S pole of the magnet 1204c are repelled, and a force that causes the magnet 1204c to rotate clockwise as shown by the arrow A4 acts. Therefore, by providing the side support parts 1705a, 1705b, the magnets 1204a, 1204c can be prevented from rotating.

[0147] Reference now Fig.18 , where another form of fixed component used in actuator 1214 will be described. Fig.18 The fixing part 1805 shown in (a) of FIG. 1 can be made of metal, preferably made of magnetic material such as iron. The fixing part 1805 includes a plate-like member 1806 and magnet supporting parts 1802a-1802h.

[0148] Fig.18 (b) in FIG. 1 shows the installation of magnets 1204a-1204c in a fixed component 1805. At the fixed component 1805, magnet support components 1802a, 1802b, 1802e, 1802f serve as the outermost side support components toward which the array of magnets 1204a, 1204b, 1204c is supported. Magnet support components 1802c, 1802h have adjacent portions C11, C14 that support magnet 1204a and are adjacent to the end of magnet 1204b. In addition, magnet support components 1802d, 1802g have adjacent portions C13, C12 that support magnet 1204c and are adjacent to the end of magnet 1204b. In this way, by configuring a fixed component 1805 made of metal, the size of the fixed component can be reduced.

[0149] (Third Embodiment)

[0150] Reference now Fig.19 and Fig. 20 , wherein the configuration of an actuator 104 according to a third embodiment of the present invention will be described.

[0151] Fig.19 is an exploded perspective view of the actuator 1914, Fig. 20 is a side cross-sectional view of actuator 1914. Actuator 1914 may be used in place of Figure 1 Actuator 104. Actuator 1914 includes a fixed part 1905, a magnetic substance 206, magnets 1904a, 1904b, 1904c, 1904d, a coil 203, and a movable part 202. Fixed part 1905 is made of a resin such as super engineering plastic or liquid crystal polymer, and is formed in a plate shape. Fixed part 1905 is a supporting member that supports magnets 1904a-1904d. Fixed part 1905 has an opening 1908 at a central position, and magnets 1904a-1904d are assembled in the opening.

[0152] Adjacent magnets 1904b, 1904c having different polarities on the surface opposite to the coil 203 are magnetized at an angle θ so that the magnetization direction extends in a direction toward the coil 203. Fig. 20 As shown by the arrow in , the magnetization direction of magnet 1904b is oriented toward the upper left, and is inclined at an angle θ relative to the direction perpendicular to the surface opposite to coil 203. The magnetization direction of magnet 1904c is oriented toward the lower left, and is inclined at an angle θ relative to the direction perpendicular to the surface opposite to coil 203. In addition, the magnetization direction of magnet 1904a is oriented toward the upper right, and is inclined at an angle θ relative to the direction perpendicular to the surface opposite to coil 203. The magnetization direction of magnet 1904d is oriented toward the lower right, and is inclined at an angle θ relative to the direction perpendicular to the surface opposite to coil 203.

[0153] Preferably, the magnetization angle θ is magnetized at an angle of 10 to 40 degrees relative to the perpendicular direction of the surface opposite to the coil 203. It should be noted that in some embodiments, the angle θ of at least one of the magnetization directions of the magnets 1904a-1904d may be different from that of the other magnets.

[0154] Fig.211904a and 1904b are shown in a top view of a fixed part and a magnet according to the present embodiment, wherein (a) shows a top view including all magnets, and (b) shows an enlarged view of the end of the magnet. The N poles of magnets 1904a and 1904b are located on the top surface (i.e., the surface opposite to coil 203), and the S poles of magnets 1904c and 1904d are located on the top surface. The lengths of magnets 1904b and 190c are also slightly shorter than those of magnets 1904a and 1904d. The fixed part 1905 as a supporting member has adjacent portions C21 and C22, which are adjacent to the ends of the faces facing each other of two non-adjacent magnets 1904a and 1904d.

[0155] refer to Fig. 22 , wherein a method for inserting magnets 1904a–1904d into a fixing member 1905 will be described. First, as shown in (a), the fixing member 1905 is set so that the opening 1908 faces upward. Then, as shown in (b), two magnets 1904a, 1904d are inserted. Here, although the inserted magnets 1904a, 1904d exert an attractive force as shown by arrows A5, A6, as shown in (c), the presence of adjacent portions C21, C22 in the fixing member 1905 can prevent the magnets 1904a, 1904d from being attracted. Then, as shown in (d), magnets 1904b, 1904c are inserted between the magnets 1904a, 1904d. At this time, the guide members 2202a, 2202b are preferably positioned to guide the insertion of the magnets 1904b, 1904c. The guide members 2202a, 2202b are made of resin or the like and are arranged to hold the two magnets 1904a, 1904d from above. In this way, when the magnets 1904b, 1904c approach, the magnets 1904a, 1904d can be prevented from rotating by attraction or repulsion.

[0156] According to the present embodiment, in order to assemble the arranged magnets, non-adjacent magnets 1904a, 1904d having different polarities on the surface facing the coil 203 are initially inserted into the support member. At this time, by having the support member with the adjacent portions C21 and C22 between the magnets 1904a, 1904d, the distance between the magnets 1904a, 1904d can be maintained even if the attractive forces interact. Thereafter, it becomes easy to insert a group of magnets 1904b, 1904c having different polarities on the surface facing the coil 203. At this time, the surfaces of the previously inserted magnets 1904a and 1904d facing the coil 203 are pressed by a jig or the like. This facilitates the insertion of a group of magnets having different polarities on the surface facing the coil 203.

[0157] Fig.231 is a diagram showing the relationship between the interval between two adjacent portions provided in the fixing member 1905 and the width of the central magnets 1904b and 1904c. Since the fixing member 1905 is provided with two adjacent portions C21 and C22, it is formed into a convex shape. The interval A between the two adjacent portions C21 and C22 is greater than or equal to the sum B of the widths of the two magnets 1904b and 1904c. Forming a gap between the magnets in this way facilitates the insertion of the magnets 1904b and 1904c between the magnets 1904a and 1904d, as shown in FIG. Fig. 22 As shown in (d) in .

[0158] Fig.24 1905 is a diagram showing the operation of the magnetic substance 206 embedded in the fixed part 1905. The magnetic substance 206 is exposed at the opening 1908. As shown in (a), when the magnets 1904a, 1904d are inserted into the opening 1908, the magnets 1904a, 1904d are attracted in the direction of the arrow. Therefore, the magnets 1904a, 1904d can be easily inserted into the opening 1908. Similarly, as shown in (b), when the magnets 1904b, 1904c are inserted into the opening 1908, the magnets 1904b, 1904c are attracted in the direction of the dotted arrow. Therefore, the magnets 1904b, 1904c can be easily inserted into the opening 1908.

[0159] Fig.25 A cross-sectional view of the fixing part 1905 is shown. The fixing part 1905 has side support parts 2505a, 2505b adjacent to the outermost sides along the array direction of the plurality of magnets 1904a-1904d. In the case where two magnets 204a, 204d are arranged in the fixing part 1905, when approaching the magnets 1904b, 1904c from above, the magnets 1904a, 1904b are repelled, and a force that moves the magnet 1904a in the direction indicated by the arrow A7 acts. In addition, the magnets 1904c and the magnets 1904d repel each other, and a force that moves the magnet 1904d in the direction indicated by the arrow A8 acts. Therefore, by providing the side support parts 2505a, 2505b, the magnets 1904a, 1904d can be prevented from moving.

[0160] Reference now Fig.26 , where another form of fixed component used in actuator 1914 will be described. Fig.26 The fixing part 2605 shown in (a) of FIG. 2 can be made of metal, preferably made of magnetic material such as iron. The fixing part 2605 includes a plate-shaped member 2606 and magnet supporting parts 2602a-2602f.

[0161] Fig.26(b) in the figure shows the installation of magnets 1904a-1904d in the fixing part 2605. Magnet support parts 2602a, 2602b, 2602d, 2602e are used as the outermost side support parts in the array direction of supporting magnets 1904a-1904d. Magnet support part 2602f has adjacent parts C21, C22, which support magnets 1904b, 1904c and are adjacent to the ends of magnets 1904a, 1904d. In addition, magnet support part 2602c has adjacent parts C23, C24, which support magnets 1904b, 1904c and are adjacent to the ends of magnets 1904a, 1904d. In this way, by configuring the fixing part 2605 composed of metal, the size of the fixing part can be reduced.

[0162] (Fourth embodiment)

[0163] Reference now Fig. 27 and Fig.28 , wherein the configuration of an actuator 2704 according to a fourth embodiment of the present invention will be described.

[0164] Fig. 27 is an exploded perspective view of actuator 2714. Actuator 2714 may be used in place of Figure 1 The actuator 104 of FIG. 2714 includes a fixed part 2705, a magnetic substance 206, magnets 2704a-2704d, a coil 203, and a movable part 202. The fixed part 2705 is a supporting member that supports the magnets 2704a-2704d. The fixed part 2705 has an opening 2708 at a central position, and the magnets 2704a-2704d are assembled in the opening.

[0165] Fig.28 is a top view of the actuator 2714; (a) is an overall view including all magnets; (b) is an enlarged view of the upper end of the magnet. The N poles of the left magnets 2704a and 2704b are located on the top surface (i.e., the surface opposite to the coil 203), and the S poles of the right magnets 2704c and 2704d are located on the top surface. The retaining member 2705 has: an adjacent portion C31, which is adjacent to the end of the side perpendicular to the array direction of the magnet 2704b; and an adjacent portion C32, which is adjacent to the end of the side perpendicular to the array direction of the magnet 2704c.

[0166] refer to Fig.29, wherein a method for inserting magnets 2704a–204d into a fixing member 2705 will be described. First, as shown in (a), the fixing member 2705 is set so that the opening 2708 faces upward. Then, as shown in (b), magnets 2704b and 2704c are inserted. Here, as shown in (c), magnets 2704b and 2704c are fixed due to the presence of adjacent portions C31 and C32 in the fixing member 2705. Then, as shown in (d), magnets 2704a and 2704d are inserted into both sides of magnets 2704b and 2704c. In this case, it is preferred to position a guide member 2902 to guide the insertion of magnets 2704a and 2704d. The guide member 2902 is made of resin or the like and is arranged to hold magnets 2704b and 2704c from above. In this manner, when the magnets 2704a, 2704d are in proximity, the magnets 2704b, 2704c may be prevented from rotating by an attractive force or a repulsive force.

[0167] According to the present embodiment, initially a pair of magnets 2704b, 2704c are inserted into the support member, and the pair of magnets have different polarities on the surface facing the coil 203. Then, the remaining magnets 2704a, 2704d are inserted into the support member, ensuring that they are adjacent to the pair of magnets. In this case, since the support member has abutment portions C31, C32, the previously inserted pair of magnets 2704b, 2704c can be kept in place. Therefore, it is convenient to insert the magnet. In addition, when the remaining magnets 2704a, 2704d are inserted, the surface side of the previously inserted magnets 2704b, 2704c facing the coil 203 is suppressed by a fixture, etc. This makes it easier to insert magnets 2704a, 2704d into the support member.

[0168] Fig.30 2704a, 2704d is inserted into the fixing member 2705. The fixing member 2705 is provided with two adjacent portions C31, C32, so it is formed into a convex shape. The interval A between the two adjacent portions C31, C32 is greater than or equal to the sum B of the widths of the magnets 2704b, 2704c. Forming the interval between the magnets 2704b, 2704c in this way facilitates the insertion of the magnets 2704a, 2704d into the fixing member 2705, as shown in FIG. Fig.29 As shown in (d) in .

[0169] Fig.312705. The magnetic substance 206 is exposed at the opening 2708. As shown in (a), when the magnets 2704b and 2704c are inserted into the opening 2708, the magnets 2704b and 2704c are attracted in the direction of the arrow. Therefore, the magnets 2704b and 2704c can be easily inserted into the opening 2708. Similarly, as shown in (b), when the magnets 2704a and 2704d are inserted into the opening 2708, the magnets 2704a and 2704d are attracted in the direction of the arrow. Therefore, the magnets 2704a and 2704d can be easily inserted into the opening 2708.

[0170] Fig.32 A cross-sectional view of the fixing part 2705 is shown. The fixing part 2705 has side support parts 3205a, 3205b adjacent to the outermost side along the array direction of the plurality of magnets 2704a-2704d. In the case where the magnets 2704b, 2704c are arranged in the fixing part 2705, when approaching the magnets 2704a, 2704d from above, the magnets 2704a, 2704b are repelled, so that the force moving in the direction indicated by the arrow A9 acts on the magnet 2704a. In addition, the magnets 2704c and the magnets 2704d repel each other, so that the force moving the magnet 2704d in the direction indicated by the arrow A10 acts. Therefore, by providing the side support parts 3205a, 3205b, the movement of the magnets 2704a, 2704d can be prevented.

[0171] Reference now Fig.33 , where another form of fixed component used in actuator 2714 will be described. Fig.33 The fixing part 3305 shown in (a) of FIG. 3 can be made of metal, preferably made of magnetic material such as iron. The fixing part 3305 includes a plate-shaped member 3306 and magnet supporting parts 3302a-3302h.

[0172] Fig.33 (b) in the figure shows a fixing part 3305 on which magnets 2704a-2704d are mounted. Magnet support parts 3302a, 3302b, 3302e, 3302f serve as the outermost side support parts in the array direction supporting magnets 2704a-2704d. Magnet support parts 3302c, 3302d have adjacent parts C33, C34, which support magnets 2704a, 2704d and are adjacent to the ends of center magnets 2704b, 2704c. In addition, magnet support parts 3302g, 3302h have adjacent parts C32, C31, which support magnets 2704a, 2704d and are adjacent to the ends of center magnets 2704b, 2704c. By configuring the fixing part 3305 made of metal in this way, the size of the fixing part can be reduced.

[0173] (Fifth Embodiment)

[0174] In the first embodiment, although an example of magnets of different lengths has been described, the lengths of the magnets may be configured to be partially different.

[0175] Reference now Fig.34 , wherein the configuration of a fixing component of an actuator according to a fifth embodiment of the present invention will be described. Fig.34 3405 is a diagram showing a fixed component 3405 according to the present embodiment. (a) shows a top view of the portion into which the end of the magnet is inserted. The fixed component 3405 exposes the magnetic substance 206 in the opening 3408. (b) shows a top view of the fixed component 3405 equipped with a magnet. The N pole of the magnet 3404a is located on the top surface (i.e., the surface opposite to the coil 203), and the S pole of the magnet 3404c is located on the top surface. In addition, the N pole of the magnet 3404b is located on the left side and the S pole is located on the right side. The lengths of the magnets 3404a–3404c on the upper surface are equal. (c) shows a cross-sectional view taken along line AA of (b). The magnet 3404b has a notch 3403 that engages with the engaging portion 3402 of the fixed component 3405. The engaging portion 3402 has an abutting portion C41 which abuts the magnet 3404a and an abutting portion C42 which abuts the magnet 3404c.

[0176] Fig.35 35 is a diagram showing a fixing part 3505 according to another embodiment. (a) shows a top view of a portion where the end of a magnet is inserted. The fixing part 3505 can be made of metal, preferably made of a magnetic material such as iron. The fixing part 3505 includes a plate member 3506 and magnet supporting parts 3502a, 3502b, 3502c.

[0177] Fig.35 (b) in the figure shows a fixed part 3505 on which magnets 3404a–3404c are mounted. At the fixed part 3505, the magnet support parts 3502a, 3502c serve as the outermost side support parts in the array direction supporting the magnets 3404a–3404c. The magnet support part 3502b supports the central magnet 3404b and has adjacent parts C51, C52, which are adjacent to the ends of the surfaces of the two magnets 3404a, 3404c facing each other. (c) shows a cross-sectional view taken along line AA of (b). In addition, (d) shows a perspective view of the magnets 3404a–3404c mounted on the fixed part 3505, and (e) shows the arrangement of the magnets when the fixed part 3505 is removed from (d). The recess 3403 of the magnet 3404b engages with the magnet support part 3502b.

[0178] The embodiment of the present invention can also be applied to the second embodiment. In this case, a notch is provided in the magnet whose surface facing the coil 203 is the N pole or the S pole.

[0179] As described above, according to an embodiment of the present invention, the magnet that is not adjacent to the adjacent portion has a notch at the end, and the support member has an engaging portion that engages with the notch. The adjacent portion is provided on the engaging portion. Even in such a form, it is possible to facilitate assembly of the actuator.

[0180] (Sixth Embodiment)

[0181] In the third embodiment, although the example of different magnet lengths has been described, the lengths of the magnets may be configured to be partially different.

[0182] Reference now Fig.36 , wherein a configuration of a fixing component of an actuator according to a sixth embodiment of the present invention will be described. Fig.36 3605 is a diagram showing a fixed component 3605 according to the present embodiment. (a) shows a top view of the portion into which the end of the magnet is inserted. The fixed component 3605 exposes the magnetic substance 206 in the opening 3608. (b) shows a top view of the magnetization mount 3605. The N poles of the magnets 3604a and 3604b are located on the top surface (i.e., the surface opposite to the coil 203), and the S poles of the magnets 3604c and 3604d are located on the top surface. The lengths of the magnets 3604a–3604d on the upper surface are equal. (c) shows a cross-sectional view in line AA of (b). The magnet 3604b has an upper notch 3603, which engages with the engaging portion 3602 of the fixed component 3605. The engaging portion 3602 has: an adjacent portion C61, which is adjacent to the magnet 3604a; an adjacent portion C62, which is adjacent to the magnet 3604d.

[0183] Fig.37 is a diagram illustrating a fixing member 3705 according to another embodiment. Fig.37 (a) in FIG. 3 shows a top view of a portion of the end of the assembled magnet. The fixing part 3705 can be made of metal, preferably made of a magnetic material such as iron. The fixing part 3705 includes a plate-like member 3706 and magnet supporting parts 3702a, 3702b, 3702c.

[0184] Fig.37(b) in (b) shows a fixed part 3705 on which magnets 3604a-3604d are installed. At the fixed part 3705, the magnet support parts 3702a, 3702c serve as the outermost side support parts in the array direction supporting the magnets 3604a-3604d. The magnet support part 3702b supports the central magnets 3604b, 3604c, and has adjacent parts C71, C72, which are adjacent to the ends of the surfaces facing each other of the two magnets 3604a, 3604d. (c) shows a cross-sectional view in line AA of (b). The recess 3603 of the magnet 3604b engages with the magnet support part 3702b.

[0185] The present embodiment can also be applied to the fourth embodiment. In this case, notches are provided in non-adjacent magnets having different poles on the surface facing the coil 203.

[0186] As described above, according to an embodiment of the present invention, the magnet that is not adjacent to the adjacent portion has a notch at the end, and the support member has an engaging portion that engages with the notch. The adjacent portion is provided on the engaging portion. Even in such a form, it is possible to facilitate assembly of the actuator.

[0187] The above embodiments can be applied to any camera unit that can use an optical image stabilization function or an autofocus function. For example, the above embodiments can be applied to a smartphone built-in camera, a tablet built-in camera, an action camera, an interchangeable lens camera, a surveillance camera, a car camera, an airplane camera, etc.

[0188] The above description is only a specific implementation of the present invention but is not intended to limit the protection scope of the present invention. Within the disclosed technical scope, any changes or substitutions that can be easily thought of by those skilled in the art should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An actuator for a camera, It is characterized in that include: a plurality of magnets; Fixed parts; a movable component, the movable component being movable relative to the fixed component; Coil, One of the fixed part and the movable part is a supporting member for supporting the plurality of magnets, wherein the coil is supported by the other of the fixed part and the movable part to face the plurality of magnets, wherein the plurality of magnets has two magnets having poles on a surface opposite to the coil, and wherein the supporting member has an abutting portion abutting ends of opposite surfaces of the two magnets.

2. An actuator for a camera, It is characterized in that include: a plurality of magnets; Fixed parts; a movable component, the movable component being movable relative to the fixed component; Coil, One of the fixed part and the movable part is a supporting member that supports the plurality of magnets, the coil is supported by the other of the fixed part and the movable part to face the plurality of magnets, the plurality of magnets have at least one magnet that is magnetized along an array direction of the plurality of magnets, and the supporting member has an adjacent portion that is adjacent to ends of the at least one magnet on both sides perpendicular to the array direction.

3. The actuator for a camera according to claim 1 or 2, It is characterized in that The plurality of magnets are arranged in a Halbach array.

4. The actuator for a camera according to claim 1 or 2, It is characterized in that An interval between two of the abutting portions is greater than or equal to a width of a magnet inserted between two of the plurality of magnets.

5. The actuator for a camera according to claim 1 or 2, It is characterized in that The supporting member is provided with a magnetic substance on a surface of the plurality of magnets, the surface being opposite to another surface of the magnets, and the other surface being opposite to the coil.

6. The actuator for a camera according to claim 1 or 2, It is characterized in that The supporting member has a member adjacent to the outermost side along the array direction of the plurality of magnets.

7. The actuator for a camera according to claim 1 or 2, It is characterized in that The abutting portion is made of resin.

8. The actuator for a camera according to claim 1 or 2, It is characterized in that The abutment portion is made of metal.

9. The actuator for a camera according to claim 1, It is characterized in that Two of the plurality of magnets are non-adjacent magnets having different polarities on a surface opposite to the coil.

10. An actuator for a camera, It is characterized in that include: Coil; a plurality of magnets magnetized at a predetermined angle relative to a direction perpendicular to a surface opposite to the coil; Fixed parts; a movable part, movable relative to the fixed part, One of the fixed part and the movable part is a supporting member that supports the plurality of magnets, the coil is supported by the other of the fixed part and the movable part to face the plurality of magnets, and the supporting member has an abutting portion that abuts ends of a pair of non-adjacent magnets, and the pair of non-adjacent magnets have different polarities on a surface facing the coil.

11. The actuator for a camera according to claim 10, It is characterized in that A spacing between two of the adjacent portions is greater than or equal to a width of a pair of adjacent magnets having different polarities on surfaces facing the coil.

12. The actuator for a camera according to claim 10, It is characterized in that The supporting member is provided with a magnetic substance on a surface of the plurality of magnets, the surface being opposite to another surface of the magnets, and the other surface being opposite to the coil.

13. The actuator for a camera according to claim 10, It is characterized in that The supporting member has a member abutting against ends of the plurality of magnets along an array direction.

14. The actuator for a camera according to claim 10, It is characterized in that The abutting portion is made of resin.

15. The actuator for a camera according to claim 10, It is characterized in that The abutment portion is made of metal.

16. An actuator for a camera, It is characterized in that include: Coil; a plurality of magnets magnetized at a predetermined angle relative to a direction perpendicular to a surface opposite to the coil; Fixed parts; a movable part, the movable part being movable relative to the fixed part, One of the fixed part and the movable part is a supporting member which supports the plurality of magnets, wherein the coil is supported by the other of the fixed part and the movable part to face the plurality of magnets, and wherein the supporting member has an abutting portion which abuts ends of a pair of adjacent magnets, and wherein the pair of adjacent magnets have different polarities on a surface facing the coil.

17. The actuator for a camera according to claim 16, It is characterized in that A spacing between two of the adjacent portions is greater than or equal to a width of the pair of adjacent magnets.

18. The actuator for a camera according to claim 16, It is characterized in that The supporting member is provided with a magnetic substance on a surface of the plurality of magnets, the surface being opposite to another surface of the magnets, and the other surface being opposite to the coil.

19. The actuator for a camera according to claim 16, It is characterized in that The supporting member has a member abutting against ends of the plurality of magnets along an array direction.

20. The actuator for a camera according to claim 16, It is characterized in that The abutting portion is made of resin.

21. The actuator for a camera according to claim 16, It is characterized in that The abutment portion is made of metal.

22. An actuator for a camera according to any one of claims 1 to 9, It is characterized in that The magnet which is not in abutment with the abutment portion has a notch at an end thereof, wherein the support member has an engagement portion which engages with the notch, and the abutment portion is provided in the engagement portion.

23. An actuator for a camera according to any one of claims 1 to 9, It is characterized in that The magnet which is not in abutment with the abutment portion has a notch at an end thereof, wherein the support member has an engagement portion which engages with the notch, and the abutment portion is provided in the engagement portion.

24. A camera module, It is characterized in that There is an actuator for a camera according to any one of claims 1 to 23.

25. An imaging device, It is characterized in that There is an actuator for a camera according to any one of claims 1 to 23.

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