JP6770119B2 - Optical unit with runout correction function - Google Patents

Description

The present invention relates to an optical unit with a shake correction function mounted on a mobile phone with a camera or the like.

In recent years, mobile devices such as mobile phones have been configured as optical devices equipped with an optical unit for photographing. In such an optical unit, in order to suppress the disturbance of the captured image due to the user's camera shake, a configuration has been proposed in which the movable body is swung to correct the shake. In order to perform such runout correction, it is necessary to support the movable body so as to be swingable with respect to the fixed body. Therefore, a configuration has been proposed in which a support mechanism such as a gimbal mechanism is provided between the movable body and the fixed body. Further, a configuration has been proposed in which a movable body and a fixed body are connected by a plate-shaped spring, and the posture of the movable body is maintained by the plate-shaped spring in a state where no external force is applied (see FIG. 9 of Patent Document 1 and the like). ).

Further, if the movable body swings excessively, the plate-shaped spring may be plastically deformed, which may interfere with the subsequent operation. Therefore, in the optical unit described in Patent Document 1, the subject-side end of the movable body is projected from the fixed body toward the subject, and a stopper member is arranged around the subject-side end of the movable body to move the movable body. A configuration has been proposed in which the permissible swing range of the body is regulated (see FIG. 7 and the like in Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-6522

However, the stopper mechanism described in Patent Document 1 has a problem that the stopper cannot be provided inside the fixed body because it is necessary to project the end portion of the movable body on the subject side from the fixed body toward the subject side. is there.

In view of the above problems, an object of the present invention is to provide an optical unit with a runout correction function capable of appropriately regulating a swing permissible range of a movable body inside a fixed body.

In order to solve the above problems, the optical unit with a runout correction function according to the present invention holds an optical element and includes a movable body having four sides forming a quadrangle when viewed from the optical axis direction, and a support mechanism. It has a fixed body that swingably supports the movable body, a plate-shaped spring connected to the movable body and the fixed body, and a drive mechanism that swings the movable body. On one side in the axial direction, the movable body protrudes toward each of the four side portions toward the one side in the optical axis direction, and when the movable body swings, the optical axis is attached to the fixed body. The other one in the optical axis direction is provided at a position where two first convex portions for stoppers that regulate the allowable swing range of the movable body are separated from each other in the extending direction of the side portion by abutting from the other side in the direction. On the side, the movable body includes a third convex portion for a stopper that projects toward the other side in the optical axis direction, and the third convex portion for the stopper is such that the movable body is the other in the optical axis direction. By abutting against the fixed body when displaced to the side, the movable range of the movable body toward the other side in the optical axis direction is restricted, and within the swing allowable range, the third convex portion for the stopper is used. It is characterized in that it is separated from the fixed body.

In the present invention, each of the four side portions of the movable body is provided with a first convex portion for a stopper that protrudes toward one side in the optical axis direction. Therefore, when the movable body swings, the first convex portion for the stopper abuts on the fixed body from the other side in the optical axis direction, so that the swing allowable range of the movable body can be regulated inside the fixed body. .. Therefore, it is possible to prevent the movable body from swinging excessively and the plate-shaped spring from being plastically deformed. Further, since the two first convex portions for stoppers are separated from each other in the extending direction of the side portions on each of the four side portions, one of the two first convex portions for stoppers when the movable body swings. Therefore, the permissible swing range can be regulated in a wide angle range around the optical axis. Further, since the two stopper first convex portions are separated from each other on each of the four side portions, the weight can be reduced as compared with the configuration in which the two stopper first convex portions are connected. Another member can be arranged near between the first convex portions for the two stoppers.

Further, the third convex portion for the stopper regulates the movable range of the movable body toward the other side in the optical axis direction, and the third convex portion for the stopper and the fixed body are separated from each other within the allowable swing range. Therefore, it is possible to regulate the movable range of the movable body toward the other side in the optical axis direction. Further, there is an advantage that the swing allowable range is not affected by the positional relationship between the third convex portion for the stopper and the fixed body.

In the present invention, the fixed body is provided with a cover on the one side of the movable body in the optical axis direction, and the movable body swings on the other side surface of the cover in the optical axis direction. It is preferable that a cushion member is provided with which the first convex portion for the stopper comes into contact with the stopper.

According to this configuration, when the first convex portion for the stopper comes into contact with the fixed body side, the first convex portion for the stopper comes into contact with the cushion member. Therefore, it is possible to suppress the generation of collision noise and the like.

In the present invention, it is preferable that the stopper third convex portion is provided on each of the two opposing side portions of the four side portions. According to such a configuration, even when the movable body swings, the third convex portion for the stopper comes into contact with the fixed body, so that the movable range of the movable body toward the other side in the optical axis direction can be restricted.

In the present invention, the drive mechanism adopts a configuration including a magnet provided on one of the fixed body and the movable body, and a coil provided on the other of the fixed body and the movable body. Can be done.

In the present invention, the magnet has an S pole and an N pole adjacent to each other in the optical axis direction on the surface side facing the coil, and the coil extends parallel to the polarization line of the magnet. A first effective side facing the S pole and a second effective side extending parallel to the polarization line and facing the N pole are provided, and within the swing allowable range of the movable body. It is preferable that the first effective side always faces the S pole and the second effective side always faces the N pole. According to such a configuration, the posture of the movable body can always be controlled by the drive mechanism within the swing allowable range of the movable body.

In the present invention, it is preferable that at least one of the surface of the coil facing the magnet and the surface of the magnet facing the coil are bent in a direction along the swing locus of the movable body. According to this configuration, even if the movable body swings, the distance between the coil and the magnet does not change significantly, so that the movable body can be driven stably.

In the present invention, among the coil and the magnet, in the member provided on the movable body, the surface facing the member provided on the fixed body is bent in the direction along the swing locus of the movable body. Is preferable. According to such a configuration, when the movable body swings, the distance that the member provided on the movable body is displaced toward the member side provided on the fixed body is short. Therefore, even if the distance between the coil and the magnet is set narrow, the coil and the magnet are unlikely to interfere with each other.

In the present invention, the coil is held on the movable body side, the magnet is held on the fixed body side, and the surface of the coil facing the magnet is bent in a direction along the swing locus of the movable body. The configuration can be adopted.

In the present invention, each of the four side portions of the movable body is provided with a first convex portion for a stopper that protrudes toward one side in the optical axis direction. Therefore, when the movable body swings, the first convex portion for the stopper abuts on the fixed body from the other side in the optical axis direction, so that the swing allowable range of the movable body can be regulated inside the fixed body. .. Therefore, it is possible to prevent the movable body from swinging excessively and the plate-shaped spring from being plastically deformed. Further, since the two first convex portions for stoppers are separated from each other in the extending direction of the side portions on each of the four side portions, one of the two first convex portions for stoppers when the movable body swings. Therefore, the permissible swing range can be regulated in a wide angle range around the optical axis. Further, since the two stopper first convex portions are separated from each other on each of the four side portions, the weight can be reduced as compared with the configuration in which the two stopper first convex portions are connected. Another member can be arranged near between the first convex portions for the two stoppers. Further, the third convex portion for the stopper regulates the movable range of the movable body toward the other side in the optical axis direction, and the third convex portion for the stopper and the fixed body are separated from each other within the allowable swing range. Therefore, it is possible to regulate the movable range of the movable body toward the other side in the optical axis direction. Further, there is an advantage that the swing allowable range is not affected by the positional relationship between the third convex portion for the stopper and the fixed body.

It is explanatory drawing which shows typically the state that the optical unit with the runout correction function to which this invention was applied was mounted on the optical device such as a mobile phone. It is explanatory drawing which looked at the optical unit with the shake correction function to which this invention was applied from the subject side. It is a YZ sectional view of the optical unit to which this invention is applied. It is explanatory drawing of the drive mechanism of the optical unit to which this invention is applied. It is an exploded perspective view which looked at the state which disassembled the movable body of the optical unit to which this invention was applied from the subject side. It is explanatory drawing which looked at the main part of the optical unit to which this invention was applied from the subject side. It is an exploded perspective view of the main part of the optical unit to which the present invention is applied, which is seen from the subject side in a more detailed manner. It is explanatory drawing which looked at the main part of the optical unit to which this invention was applied from the side opposite to the subject side. It is an exploded perspective view of the main part of the optical unit to which the present invention is applied, which is viewed from the side opposite to the subject side. It is explanatory drawing of the stopper which regulates the swing permissible range of a movable body in the optical unit to which this invention is applied. It is explanatory drawing of the drive mechanism used for the optical unit which concerns on another Embodiment of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the following description, a configuration for preventing camera shake of a movable body (optical module) for imaging will be illustrated. Further, in the following description, the three directions orthogonal to each other are defined as the X-axis direction, the Y-axis direction, and the Z-axis direction, and the direction along the optical axis L (lens optical axis / optical element optical axis) is defined as the Z-axis direction. .. Further, in the following description, of the runouts in each direction, the rotation around the X-axis corresponds to so-called pitching (pitching), and the rotation around the Y-axis corresponds to so-called yawing (rolling), and the Z-axis. Rotation around corresponds to so-called rolling. Further, + X is attached to one side in the X-axis direction, -X is attached to the other side, + Y is attached to one side in the Y-axis direction, -Y is attached to the other side, and the Z-axis is attached. One side of the direction (subject side / front side in the optical axis direction) is marked with + Z, and the other side (opposite side to the subject side / rear side in the optical axis direction) is marked with −Z.

(Overall configuration of optical unit for photography)
FIG. 1 is an explanatory diagram schematically showing a state in which an optical unit with a runout correction function to which the present invention is applied is mounted on an optical device such as a mobile phone.

The optical unit 100 (optical unit with a shake correction function) shown in FIG. 1 is a thin camera used in an optical device 1000 such as a mobile phone with a camera, and is supported by a chassis 2000 (device body) of the optical device 1000. It is installed in. In such an optical unit 100, if the optical device 1000 causes a shake such as a camera shake during shooting, the captured image is disturbed. Therefore, as will be described later, the optical unit 100 of the present embodiment oscillatingly supports the movable body 10 having the movable body 10 having the optical axis L extending along the Z-axis direction in the fixed body 20. In addition, a drive mechanism (not shown in FIG. 1) that swings the movable body 10 based on the result of detecting camera shake by a gyroscope (shake detection sensor) mounted on the optical unit 100 is provided. Flexible wiring boards 1800 and 1900 for supplying power to the movable body 10 and the drive mechanism are pulled out from the optical unit 100, and the flexible wiring boards 1800 and 1900 are provided on the main body side of the optical device 1000. It is electrically connected to a higher-level control unit or the like. In the movable body 10, the movable body 10 includes a lens 1a as an optical element, in which the optical axis L extends along the Z-axis direction. In this embodiment, when viewed from the direction of the optical axis L, the lens 1a is circular, but the movable body 10 is square.

(Rough configuration of optical unit 100)
FIG. 2 is an explanatory view of an optical unit 100 with a runout correction function to which the present invention is applied as viewed from the subject side (one side in the Z-axis direction + Z), and FIGS. 2A and 2B are optical units 100. Is a perspective view when viewed from the subject side, and is an exploded perspective view of the optical unit 100. FIG. 3 is a YZ cross-sectional view of the optical unit 100 to which the present invention is applied.

In FIGS. 2 and 3, the optical unit 100 of the present embodiment is a gimbal in which the fixed body 20, the movable body 10 (optical module), and the movable body 10 are swingably supported by the fixed body 20. It has a support mechanism including a mechanism 30 and the like, and a drive mechanism 50 that generates a magnetic driving force that causes the movable body 10 to be displaced relative to the fixed body 20 between the movable body 10 and the fixed body 20. Further, the fixed body 20 and the movable body 10 are connected by a plate-shaped spring 70. In the optical unit 100, as shown in FIG. 2, the movable body 10 is swingably supported with respect to the fixed body 20 around the first axis R1 intersecting the optical axis L direction via the gimbal mechanism 30. At the same time, it is swingably supported around the second axis R2 which intersects the optical axis L direction and the first axis R1 direction. In this embodiment, the first axis R1 and the second axis R2 are orthogonal to the optical axis L direction. Further, the fixed body 20 is square when viewed from the optical axis L direction. Therefore, the first axis R1 and the second axis R2 are orthogonal to each other.

(Structure of fixed-point 20)
As shown in FIGS. 2 and 3, the fixed-point 20 includes a square first case 210. The first case 210 includes a square tubular body portion 211 that surrounds the movable body 10, and a rectangular frame-shaped end plate portion that projects radially inward from one side + Z end portion of the body portion 211 in the Z-axis direction. A rectangular window 212a is formed on the end plate portion 212. Further, the fixed body 20 includes a cover 220 fixed to one side + Z in the Z-axis direction of the first case 210 and a sheet-shaped cushion member 230 fixed to the other side −Z in the Z-axis direction of the cover 220. Have. The cushion member 230 is formed in a rectangular frame shape, and is arranged along the outer peripheral edge of the cover 220. The cushion member 230 is made of rubber, elastic resin, or the like.

The cover 220 is a plate-shaped member that overlaps the end plate portion 212 of the first case 210, and has a circular opening 221 formed in the center. In the present embodiment, one side + Z surface of the cover 220 in the Z-axis direction is used as a cover-side reference surface 228 orthogonal to the optical axis L direction.

The cover 220 is fixed to the first case 210 in a state of being overlapped with the end plate portion 212 of the first case 210. The cushion member 230 is fixed to the cover 220 with an adhesive tape or the like so as not to overlap the end plate portion 212 of the first case 210. Further, the fixed body 20 is a second case fixed to the first case 210 by welding or the like in a state where the rectangular frame-shaped stopper member 240 and the stopper member 240 are sandwiched between the body portion 211 of the first case 210. It has 250 and a bottom plate 260 fixed to the second case 250 in a state of overlapping the other side −Z in the Z-axis direction of the second case 250. The second case 250 has a rectangular bottom plate portion 251 and a square tubular body portion 255 extending from the bottom plate portion 251 to one side + Z in the Z-axis direction, and the bottom plate portion 251 has an opening 252. Is formed. The portion of the stopper member 240 located on the inner peripheral side overlaps the holder 40 of the movable body 10 on the other side −Z in the Z-axis direction. Further, in the stopper member 240, an overhanging portion 241 protruding outward is formed on the outer peripheral edge of each side. Therefore, when the first case 210 is superposed on the second case 250 in the Z-axis direction, the overhanging portion 241 of the stopper member 240 is between the body portion 211 of the first case 210 and the body portion 255 of the second case 250. Is held in.

(Structure of drive mechanism 50)
FIG. 4 is an explanatory view of the drive mechanism 50 of the optical unit 100 to which the present invention is applied, and FIGS. 4A and 4B are an exploded perspective view of the drive mechanism 50 and the drive mechanism 50 are further disassembled. It is an exploded perspective view.

As shown in FIGS. 2, 3 and 4, the movable body 10 includes a lens holder 11 (see FIG. 3) for holding the lens 1a and the like, a holder 40 for holding the lens holder 11 inside, and a Z of the holder 40. It has a cylindrical weight 12 fixed to one side + Z in the axial direction. The weight 12 adjusts the position of the center of gravity of the movable body 10 in the Z-axis direction. Here, the lens holder 11 may directly hold the lens 1a or the like, and may also hold the focusing drive mechanism or the like together with the lens 1a. The weight 12 is made of non-magnetic metal, for example, brass. Therefore, no magnetic attraction is generated between the weight 12 and the magnet 52. When light is taken into the movable body 10 from the front side in the optical axis L direction, if the light reflected by the weight 12 enters the movable body 10, the light becomes stray light and deteriorates the quality of the image. Therefore, in this embodiment, at least one side of the weight 12 in the Z-axis direction + Z edge and the like are subjected to antireflection treatment such as black coating.

In this embodiment, the drive mechanism 50 is configured between the holder 40 and the first case 210. More specifically, the drive mechanism 50 is a magnetic drive mechanism that utilizes a plate-shaped magnet 52 and a coil 56. The coil 56 is an air-core coil, and is one side of the movable body 10 (holder 40) in the X-axis direction + X, the other side in the X-axis direction −X, one side in the Y-axis direction + Y, and the other side in the Y-axis direction. It is held in −Y. Further, the magnet 52 is the inner surface of the side plate portion 216 located on one side + X in the X-axis direction, the inner surface of the side plate portion 217 located on the other side −X in the X-axis direction, Y in the body portion 211 of the first case 210. It is held on the inner surface of the side plate portion 218 located on one side + Y in the axial direction and on the inner surface of the side plate portion 219 located on the other side −Y in the Y-axis direction. Therefore, between the holder 40 and the body portion 211 of the first case 210, one side in the X-axis direction + X, the other side in the X-axis direction −X, one side in the Y-axis direction + Y, and the other side in the Y-axis direction. In any of −Y, the magnet 52 and the coil 56 face each other.

In this embodiment, the magnet 52 is magnetized on different poles on the outer surface side and the inner surface side. Further, the magnet 52 is divided into two at the center in the L direction of the optical axis, and the portions adjacent to each other in the L direction of the optical axis on the surface side facing the coil 56 are the S pole and the N pole. Further, the coil 56 has a first effective side 561 extending parallel to the polarization line 520 of the magnet 52 and facing the S pole, and a second effective side extending parallel to the polarization line 520 and facing the N pole. It is equipped with 562. In this embodiment, the swing permissible range of the movable body 10 is regulated by the stopper 9b (see FIG. 3) described later, and within the swing permissible range, the first effective side 561 always faces the S pole, and the first effective side is the first. The two effective sides 562 always face the north pole. The four magnets 52 have the same magnetizing pattern for the outer surface side and the inner surface side. Therefore, since the magnets 52 adjacent to each other in the circumferential direction do not attract each other, assembly and the like are easy. The first case 210 is made of a magnetic material and functions as a yoke for the magnet 52.

(Structure of movable body 10)
FIG. 5 is an exploded perspective view of the movable body 10 of the optical unit 100 to which the present invention is applied as viewed from the subject side (one side in the Z-axis direction + Z).

As shown in FIGS. 3 and 5, in the movable body 10, the image pickup element 1b is arranged inside the holder 40, and the image pickup element 1b is the first mounting portion 1810 of the flexible wiring board 1800 for signal output. It is mounted directly on or via a mounting board. The flexible wiring board 1800 has a curved portion 1820 that is curved toward the rear side (the other side −Z in the Z axis direction) in the optical axis L direction at the end portion of the first mounting portion 1810 on the other side −Y in the Y axis direction. It has a rectangular second mounting portion 1830 connected to the curved portion 1820 on the other side −Y in the Y-axis direction, and a routing portion 1840 drawn outward from the second mounting portion 1830. In the flexible wiring board 1800, a reinforcing plate 15 is sandwiched between the first mounting portion 1810 and the second mounting portion 1830. Electronic components 14 such as a gyroscope 13 and a capacitor are mounted on the surface of the second mounting portion 1830 facing the other side −Z in the Z-axis direction.

In this embodiment, the routing portion 1840 is divided in the X-axis direction by a slit 1850 extending in the Y-axis direction. The routing portion 1840 has a first extending portion 1862 extending from one side + Y in the Y-axis direction to the other side −Y, and a rear side in the optical axis direction (the other in the Z-axis direction) on the tip side of the first extending portion 1862. It has a first curved portion 1863 that curves toward the side −Z), and a second extended portion 1864 that extends from the first curved portion 1863 toward one side + Y in the Y-axis direction. Further, the routing portion 1840 is a second curved portion 1866 that is curved toward the rear side in the optical axis direction (the other side −Z in the Z axis direction) between the drawn portion from the movable body 10 and the first extending portion 1862. The first extending portion 1862 extends from the second curved portion 1866 in a state orthogonal to the optical axis L direction. The second extending portion 1864 is pulled out from the middle through the opening 252 of the bottom plate portion 251 of the second case 250, and the bottom plate portion is provided by a flexible sheet 19 (see FIG. 2) such as double-sided tape. It is fixed at 251. The portion of the second extending portion 1864 that is pulled out from the opening 252 of the bottom plate portion 251 of the second case 250 is covered by the bottom plate 260.

In the movable body 10, a flexible wiring board 1900 for supplying power to the coil 56 is connected to the end portion of the movable body 10 on the other side −Z in the Z-axis direction. The flexible wiring board 1900 has a rectangular frame portion 1910 extending along the outer edge of the holder 40 and a strip-shaped routing portion 1940 extending from the rectangular frame portion 1910 on the other side −Z of the holder 40 in the Z-axis direction. Four coils 56 are connected to the rectangular frame portion 1910. The routing portion 1940 has a first extending portion 1962 extending from one side + Y in the Y-axis direction to the other side −Y, and a rear side in the optical axis direction (the other in the Z-axis direction) on the tip side of the first extending portion 1962. It has a first curved portion 1963 that curves toward the side −Z), and a second extended portion 1964 that extends from the first curved portion 1963 toward one side in the Y-axis direction + Y. Further, the routing portion 1940 is a second curved portion 1966 that is curved toward the rear side in the optical axis direction (the other side −Z in the Z axis direction) between the drawn portion from the movable body 10 and the first extending portion 1862. The first extending portion 1962 extends from the second curved portion 1966 in a state orthogonal to the optical axis L direction.

The second extending portion 1964 is pulled out from the middle through the opening 252 of the bottom plate portion 251 of the second case 250, and is fixed to the bottom plate portion 251 by a flexible sheet 19 such as double-sided tape. There is. Further, the portion of the second extending portion 1964 that is pulled out from the opening 252 of the bottom plate portion 251 of the second case 250 is covered with the bottom plate 260.

A plate-shaped spacer 18 is fixed by an adhesive to the surface of the second mounting portion 1830 facing the other side −Z in the Z-axis direction. The spacer 18 is a plate material having a substantially rectangular shape, and the gyroscope 13 and the electronic component 14 are located inside. Further, a clamp member 190 is attached to one side of the spacer 18 in the Y-axis direction + Y end, and the clamp member 190 uses the first extending portions 1862 and 1962 as the spacer 18 via the elastic sheet 195. Hold between.

(Detailed configuration of holder 40)
FIG. 6 is an explanatory view of a main part of the optical unit 100 to which the present invention is applied as viewed from the subject side (one side in the Z-axis direction + Z), and FIGS. 6A and 6B are a cover 220 and a holder 40. It is a perspective view of a state in which and is connected via a gimbal mechanism 30 and a plate-shaped spring 70, and is an exploded perspective view which shows a state in which a cover 220 and a holder 40 are separated. FIG. 7 is an exploded perspective view of the main part of the optical unit 100 to which the present invention is applied, as viewed from the subject side (one side in the Z-axis direction + Z). FIG. 8 is an explanatory view of a main part of the optical unit 100 to which the present invention is applied as viewed from the side opposite to the subject side (the other side −Z in the Z-axis direction), and FIGS. 8 (a) and 8 (b) are shown. It is a perspective view of the state where the cover 220 and the holder 40 are connected via the gimbal mechanism 30 and the plate-shaped spring 70, and is the exploded perspective view which shows the state which the cover 220 and the holder 40 are separated. FIG. 9 is an exploded perspective view of the main part of the optical unit 100 to which the present invention is applied, as viewed from the side opposite to the subject side (the other side −Z in the Z-axis direction). Although the cushion member 230 is arranged between the movable body 10 and the cover 220, the cushion member 230 is not shown in FIGS. 6 to 9.

As shown in FIGS. 6 and 8, in the movable body 10, the holder 40 constitutes the outer peripheral portion of the movable body 10, and is generally one of the thick base portion 42 and the base portion 42 in the Z-axis direction. On the side + Z, it has a cylindrical portion 41 that holds the lens holder 11 shown in FIG. 3 inside.

As shown in FIGS. 7 and 9, in the base portion 42 of the holder 40, a side plate portion 45 is formed so as to surround the cylindrical portion 41 on the radial outer side of the cylindrical portion 41, and the side plate portion 45 and the cylindrical portion are formed. A space is formed between the gimbal mechanism 30 and the movable frame 39 of the gimbal mechanism 30. The side plate portion 45 has a notch 451 formed in the center in any of one side + X in the X-axis direction, the other side −X in the X-axis direction, one side + Y in the Y-axis direction, and the other side −Y in the Y-axis direction. The movable frame 39 and the plate-shaped spring 70 are less likely to interfere with each other.

As shown in FIG. 3, a coil holding portion 44 composed of two convex portions is formed on the radial outer surface of the side plate portion 45, and the coil 56 is fitted in the coil holding portion 44 and adhered or the like. The coil 56 is held by the holder 40. In this state, the coil holding portion 44 partially protrudes from the outer surface of the coil 56 (the surface facing the magnet 52) and faces the magnet 52. Therefore, when the movable body 10 is displaced in the X-axis direction or the Y-axis direction by an external force, the coil holding portion 44 comes into contact with the magnet 52 and regulates the movable range thereof. In this way, between the fixed body 20 and the movable body 10, a stopper 9a that regulates the movable range of the movable body 10 in the direction orthogonal to the optical axis L direction is provided by the coil holding portion 44 and the magnet 52. It is configured.

Again, in FIGS. 7 and 9, in the holder 40, on the other side −Z in the Z-axis direction, two holder-side reference surfaces 481 orthogonal to the optical axis L direction are formed on both sides in the Y-axis direction.

Further, in the holder 40, holder-side penetrating portions 47 that penetrate the base portion 42 in the Z-axis direction are formed at two locations that are separated from each other in the second axis R2 direction with the cylindrical portion 41 in between. Further, at a position adjacent to the holder-side reference surface 481 on the other side −Z of the holder 40 in the Z-axis direction, a step portion 43 located on one side + Z in the Z-axis direction from the holder-side reference surface 481 is formed. ..

(Structure of convex portion for fixing plate-shaped spring 70)
In the holder 40, on the end surface of the cylindrical portion 41 on one side + Z in the Z direction, adhesive protrusions 49 projecting on one side + Z in the Z direction are formed at a plurality of locations in the circumferential direction. In this embodiment, the adhesive protrusions 49 are provided at a total of four locations: one side + X in the X-axis direction, the other side −X in the X-axis direction, one side + Y in the Y-axis direction, and the other side −Y in the Y-axis direction. It is formed at equal intervals. Here, a cylindrical weight 12 is fixed to one side of the cylindrical portion 41 in the Z direction + Z end surface, and the dimension of the weight 12 in the Z-axis direction is the protrusion dimension of the adhesive convex portion 49 in the Z-axis direction. Greater. However, the outer diameter of the weight 12 is smaller than the outer diameter of the cylindrical portion 41, and a groove 120 extending in the Z direction is formed at a position overlapping the adhesive convex portion 49. For this reason, of the side surface 490 of the adhesive convex portion 49 facing in the direction intersecting the optical axis L direction, the portion corresponding to about 1/2 circumference protrudes outward in the radial direction from the outer peripheral surface of the weight 12.

(Detailed configuration of cover 220)
The cover 220 is a resin molded product having a substantially quadrangular planar shape. The outer peripheral end of the cover 220 is a thin portion 229, and overlaps the body portion 211 of the first case 210 shown in FIG. 3 and the like. In the cover 220, cover-side penetrating portions 222 are formed at two locations sandwiching the opening 221 on both sides in the first axis R1 direction, and penetrating portions 223 are formed at two locations sandwiching the opening 221 on both sides in the second axis R2 direction. Is formed.

As shown in FIG. 2B, on one side + Z of the cover 220 in the Z-axis direction, a portion adjacent to the cover-side penetrating portion 222 on the radial side and a second axis line with respect to the cover-side penetrating portion 222. The portions adjacent to each other in the R2 direction are stepped portions 224 located on the other side −Z in the Z-axis direction from the one-side + Z surface in the Z-axis direction of the cover 220.

Further, as shown in FIG. 9, the cover 220 protrudes from between the cover side penetrating portion 222 and the opening 221 toward the other side −Z in the Z-axis direction on the other side −Z surface in the Z-axis direction. A plate-shaped first contact support portion 225 is formed. The first contact support portion 225 is a support portion of the first contact spring 36, which will be described later. In the present embodiment, the first contact support portion 225 projects from a position adjacent to the cover-side penetrating portion 222 on the opening 221 side toward the other side −Z in the Z-axis direction. Further, of the two first contact support portions 225, the width dimension of the first contact support portion 225a located on one side in the direction of the first axis R1 is larger on the tip side 225d than on the base end side 225c. On the other hand, the width dimension of the first contact support portion 225b located on the other side in the direction of the first axis R1 is smaller on the tip side 225f than on the base end side 225e.

On the other side −Z surface of the cover 220 in the Z axis direction, one side + X in the X axis direction, the other side −X in the X axis direction, one side + Y in the Y axis direction, and the Y axis with respect to the opening 221. A spring support portion 226 protruding toward the other side −Z in the Z-axis direction is formed at a position separated from the other side −Y in the direction. Further, on the tip surface 226a (the surface of the other side −Z in the Z-axis direction) of the spring support portion 226, an adhesive convex portion 227 protruding from the tip surface 226a toward the other side −Z in the Z-axis direction is formed. ing. The spring support portion 226 is a support portion of the plate-shaped spring 70, which will be described later.

(Structure of gimbal mechanism 30)
As shown in FIGS. 6 and 8, in the optical unit 100 of the present embodiment, the cover 220 and the movable body of the fixed body 20 are swingably supported around the first axis R1 and around the second axis R2. A gimbal mechanism 30 described below is configured between the holder 40 and the holder 40.

In this embodiment, in configuring the gimbal mechanism 30, a movable frame 39 is provided between the cover 220 and the holder 40. Further, first swing fulcrums 31 are provided between the movable frame 39 and the cover 220 at two locations separated in the first axis R1 direction, and between the movable frame 39 and the holder 40 in the second axis R2 direction. The second swing fulcrum 32 is provided at two places separated by.

As shown in FIGS. 7 and 9, the movable frame 39 is a rectangular frame and has a first corner portion 391, a second corner portion 392, a third corner portion 393, and a fourth corner portion 394 around the optical axis L. Between the first corner portion 391 and the second corner portion 392, between the second corner portion 392 and the third corner portion 393, between the third corner portion 393 and the fourth corner portion 394, and the first A first connecting portion 396, a second connecting portion 397, a third connecting portion 398, and a fourth connecting portion 399 are provided between the four corner portions 394 and the first corner portion 391. In this embodiment, of the first corner portion 391, the second corner portion 392, the third corner portion 393, and the fourth corner portion 394, the second corner portion 392 and the fourth corner portion diagonally formed in the direction of the first axis R1. The first swing fulcrum 31 is provided in 394, and the second swing fulcrum 32 is provided in the first corner portion 391 and the third corner portion 393 which are diagonal in the second axis R2 direction.

In the present embodiment, the first connecting portion 396, the second connecting portion 397, the third connecting portion 398, and the fourth connecting portion 399 form a meandering portion curved in a direction orthogonal to the extending direction and the Z-axis direction, respectively. Have. Therefore, the movable frame 39 can be elastically deformed in the direction orthogonal to the optical axis L direction.

Here, a metal sphere 38 is fixed to the inside of the first corner portion 391, the second corner portion 392, the third corner portion 393, and the fourth corner portion 394 of the movable frame 39 by welding or the like, and the sphere is such a sphere. Reference numeral 38 denotes a protrusion having a hemispherical convex surface directed inward in the radial direction.

(Composition of contact spring)
As shown in FIGS. 7 and 9, in the present embodiment, at least one of the swing fulcrum 31 and the second swing fulcrum 32 has a contact portion (with the sphere 38) with the movable frame 39 side. A contact spring for applying an elastic load is provided on the contact portion). In the present embodiment, the contact springs are provided as the first contact springs 36 at each of the two first swing fulcrums 31 and as the second contact springs 37 at each of the two second swing fulcrums 32. It is provided. In the present embodiment, the first contact spring 36 is provided on the cover 220 (fixed body 20 side), and the second contact spring 37 is provided on the holder 40 (movable body 10 side).

The first contact spring 36 has a metal plate shape, and has a fixing portion 361 for fixing the first contact spring 36 to the cover 220 and the fixing portion 361 toward the other side −Z in the Z-axis direction. The extending portion 362 and the end portion of the extending portion 362 opposite to the fixing portion 361 (the other end in the Z-axis direction −Z end) are fixed portions 361 (one side in the Z-axis direction + Z). The folded-back portion 363 is provided with a folded-back portion 363, and the folded-back portion 363 is provided with a sphere 38 fixed to the movable frame 39 inside the second corner portion 392 and the fourth corner portion 394 of the movable frame 39. A concave contact portion 365 for receiving is provided. In this embodiment, the contact portion 365 is a hemispherical recess. In the first contact spring 36, the extending portion 362 and the U-shaped bent portion between the extending portion 362 and the folded portion 363 apply an elastic load to the contact portion 365 with the movable frame 39 side. Demonstrate the springiness to be applied.

In this embodiment, the fixed portion 361 is bent at a right angle to the extending portion 362. In the first contact spring 36 configured in this way, by inserting the extending portion 362 into the cover-side penetrating portion 222 formed in the cover 220, the fixing portion 361 is inserted into the step portion 224 on one side + Z in the Z-axis direction. The step portion 224 and the fixing portion 361 are fixed by overlapping. In this state, the root side of the extending portion 362 located on the side of the fixed portion 361 is supported from the inside in the radial direction by the first contact supporting portion 225 protruding from the cover 220 to the other side −Z in the Z direction. The first contact spring 36 may be fixed by adhesion. Further, the spring 36 for the first contact and the cover 220 may be integrated by insert molding.

Here, the folded-back portion 363 has a movable frame 39 from one side in the optical axis L direction (the other side −Z in the Z axis direction) with respect to the contact portion 365 to one side in the optical axis L direction (the other side in the Z axis direction −Z). The first convex portion 366 projecting in the direction orthogonal to the optical axis L direction in Z) and the optical axis L direction of the movable frame 39 from the other side (one side in the Z axis direction + Z) in the optical axis L direction with respect to the contact portion 365. A second convex portion 367 protruding in a direction orthogonal to the optical axis L direction is formed on the other side (one side in the Z-axis direction + Z), and the movable frame 39 has a first convex portion 366 and a second convex portion. It passes between part 367. In the present embodiment, the first convex portion 366 and the second convex portion 367 are formed only on one side in the width direction of the folded portion 363, but may be formed on both sides of the folded portion 363 in the width direction.

The second contact spring 37 has a metal plate shape, and has a fixing portion 371 for fixing the second contact spring 37 to the holder 40 and extending from the fixing portion 371 toward one side + Z in the Z-axis direction. At the end of the extending portion 372 opposite to the fixing portion 371 of the extending portion 372 (one side in the Z-axis direction + the end of Z), the fixing portion 371 (the other side in the Z-axis direction-Z) The folded-back portion 373 is provided with a folded-back portion 373 that is folded toward the end, and the folded-back portion 373 receives a sphere 38 fixed to the movable frame 39 inside the first corner portion 391 and the third corner portion 393 of the movable frame 39. A concave contact portion 375 is provided. In this embodiment, the contact portion 375 is a hemispherical recess. In the second contact spring 37, the extending portion 372 and the U-shaped bent portion between the extending portion 372 and the folded portion 373 apply an elastic load to the contact portion 375 with the movable frame 39 side. Demonstrate the springiness to be applied.

In this embodiment, the fixed portion 371 is bent at a right angle to the extending portion 372. The second contact spring 37 configured in this way has the fixing portion 371 inserted into the step portion 43 on the other side −Z in the Z-axis direction by inserting the extending portion 372 into the holder side penetrating portion 47 formed in the holder 40. The step portion 43 and the fixing portion 371 are fixed together. In this state, the root side of the extending portion 372 located on the side of the fixed portion 371 is supported from the inside in the radial direction by the second contact supporting portion 470 formed of the inner surface of the holder side penetrating portion 47. The second contact spring 37 may be fixed by adhesion. Further, the spring 37 for the second contact and the holder 40 may be integrated by insert molding.

Here, the folded-back portion 373 has a movable frame 39 from one side in the optical axis L direction (the other side in the Z-axis direction −Z) to the contact portion 375 in the optical axis L direction (the other side in the Z-axis direction −Z). The first convex portion 376 protruding orthogonally to the optical axis L direction in Z) and the other side (one side in the Z axis direction + Z) in the optical axis L direction with respect to the contact portion 375 in the optical axis L direction of the movable frame 39. A second convex portion 377 protruding in a direction orthogonal to the optical axis L direction is formed on the other side (one side in the Z-axis direction + Z), and the movable frame 39 has a first convex portion 376 and a second convex portion. It passes between 377. In the present embodiment, the first convex portion 376 and the second convex portion 377 are formed only on one side in the width direction of the folded portion 373, but may be formed on both sides of the folded portion 373 in the width direction.

Further, an opening 378 is formed in the fixed portion 371, and the end portion of the fixed portion 371 opposite to the extending portion 372 is bent in one side + Z in the Z-axis direction to the holder side. A spring portion 379 that comes into contact with the inner surface of the penetrating portion 47 from the inside in the radial direction is formed. Therefore, the extending portion 372 abuts on the inner surface of the holder-side penetrating portion 47 (second contact support portion 470) from the radial outside, and the spring portion 379 hits the inner surface of the holder-side penetrating portion 47 from the radial inside. Get in touch. As a result, the second contact spring 37 is positioned in the radial direction. Therefore, the radial position of the second contact spring 37 can be defined by the spring portion 379.

In the gimbal mechanism 30 configured in this way, the urging force of the first contact spring 36 used for each of the two first swing fulcrums 31 is equal, and the second swing fulcrum 32 used for each of the two places has the same urging force. The fulcrum force of the two-contact spring 37 is equal. Further, the spring 36 for the first contact and the spring 37 for the second contact have the same urging force. Further, in this embodiment, since the magnetic drive mechanism is used for the drive mechanism 50, the movable frame 39, the first contact spring 36, and the second contact spring 37 used for the gimbal mechanism 30 are all non-magnetic. It consists of materials.

In this embodiment, the movable frame 39 is at the same height position as the coil holding portion 44 (the same position in the Z-axis direction). Therefore, the gimbal mechanism 30 is provided at a position overlapping the drive mechanism 50 when viewed from a direction orthogonal to the optical axis L direction. In particular, in this embodiment, the gimbal mechanism 30 is provided at a position overlapping the center of the drive mechanism 50 in the Z-axis direction when viewed from a direction orthogonal to the L direction of the optical axis.

In this way, with the gimbal mechanism 30 configured, the optical axis of the combined elastic force of the elastic force of the movable frame 39 and the elastic force of the contact springs (first contact spring 36 and second contact spring 37). The natural frequency in the L direction is fa, the natural frequency in the direction orthogonal to the optical axis L direction of the combined elastic force is fb, and the maximum frequency in the frequency band of disturbance (vibration transmitted from the outside) is fc. When
The frequencies fa, fb, and fc have the following relationship: fc <fa <fb
Meet. Therefore, vibration due to disturbance can be suppressed.

(Structure of plate-shaped spring 70)
The movable body 10 of the present embodiment has a plate-shaped spring 70 that is connected to the movable body 10 and the fixed body 20 and defines the posture of the movable body 10 when the drive mechanism 50 is in the stopped state. In the present embodiment, the plate-shaped spring 70 is a spring member obtained by processing a metal plate into a predetermined shape, and includes a fixed body side connecting portion 71 connected to the fixed body 20 and a movable body side connecting portion 72 connected to the movable body 10. It has a leaf spring-shaped arm portion 73 that connects the fixed body side connecting portion 71 and the movable body side connecting portion 72. In this embodiment, there are four arm portions 73, which extend from the fixed body side connecting portion 71 to the movable body side connecting portion 72 while being folded back from one side in the circumferential direction to the other side.

Here, the fixed body side connecting portion 71 extends in the circumferential direction from one end of the arm portion 73, but four are provided in a one-to-one relationship with respect to the four arm portions 73. It is interrupted in the circumferential direction. In the present embodiment, the fixed body side connecting portion 71 is arranged at two locations where the optical axis L is sandwiched on both sides in the X-axis direction and at two locations where the optical axis L is sandwiched on both sides in the Y-axis direction, and is a first swing fulcrum. It is interrupted at the place where 31 and the second swing fulcrum 32 are provided. Each of the four fixed body side connecting portions 71 is formed with a penetrating portion 710 formed of a hole into which the adhesive convex portion 227 formed in the spring support portion 226 of the cover 220 is fitted. Therefore, the adhesive convex portion 227 formed on the spring support portion 226 of the cover 220 is fitted into the penetrating portion 710 of the fixed body side connecting portion 71, and the adhesive convex portion 227 and the fixed body side connecting portion 71 are fixed by an adhesive. Can be done. In the present embodiment, the penetrating portion 710 is formed at the root portion connected to the arm portion 73 in the fixed body side connecting portion 71.

The movable body side connecting portion 72 extends in the circumferential direction from the other end portion of the four arm portions 73 and is connected in an annular shape. Further, a penetrating portion 720 formed of a notch into which the adhesive convex portion 49 of the holder 40 fits is formed on the inner edge of the movable body side connecting portion 72. In the present embodiment, the penetrating portions 720 are formed at two locations that sandwich the optical axis L on both sides in the X-axis direction and two locations that sandwich the optical axis L on both sides in the Y-axis direction, for a total of four locations. Therefore, the adhesive convex portion 49 formed on the holder 40 can be fitted into the penetrating portion 720 of the movable body side connecting portion 72, and in this state, the adhesive convex portion 49 and the movable body side connecting portion 72 can be fixed with an adhesive. it can. In the present embodiment, the penetrating portion 720 is formed at the root portion connected to the arm portion 73 in the movable body side connecting portion 72.

(Configuration and basic operation of drive mechanism 50, etc.)
When the optical device 1000 shown in FIG. 1 swings in the optical unit 100 configured in this way, the swing is detected by the gyroscope 13, and the control IC (not shown) controls the drive mechanism 50. That is, a drive current that cancels the runout detected by the gyroscope 13 is supplied to the coil 56. At that time, the current balance supplied to the four coils 56 is controlled. As a result, the movable body 10 swings around the first axis R1 and swings around the second axis R2 to correct the camera shake.

(How to connect the plate spring 70)
In this embodiment, the posture of the movable body 10 is maintained by the plate-shaped spring 70 so that the optical axis L does not tilt with respect to the Z axis during the stop period in which the coil 56 is not energized in the drive mechanism 50. During that time, the plate-shaped spring 70 is in a state in which no urging force is applied to the movable body 10. In order to realize such a configuration, in the present embodiment, when the cover 220 and the holder 40 are connected via the plate-shaped spring 70 in the assembly process of the optical unit 100, the cover 220 is not deformed without deforming the plate-shaped spring 70. The cover 220 and the holder 40 are connected to each other via a plate-shaped spring 70 with a predetermined positional relationship.

More specifically, first, in the cover 220, the plate-shaped spring 70, and the adhesive portion (second connecting portion), the spring supporting portion 226 of the cover 220 is connected to the penetrating portion 710 of the fixed body side connecting portion 71 (second connecting portion). The adhesive convex portion 227 is fitted, and in this state, the adhesive convex portion 227 and the fixed body side connecting portion 71 are fixed by an adhesive (second adhesive).

Next, the relative positions of the holder 40 and the plate-shaped spring 70 are adjusted so that the cover-side reference surface 228 of the cover 220 and the holder-side reference surface 481 of the holder 40 are parallel to each other.

Next, the holder 40 and the plate-shaped spring 70 are connected in accordance with the position of the plate-shaped spring 70 in a state where the relative positions of the cover 220 and the plate-shaped spring 70 are adjusted. That is, in the connecting portion (first connecting portion) between the holder 40 and the plate-shaped spring 70, the adhesive convex portion 49 of the holder 40 is fitted into the penetrating portion 720 of the movable body side connecting portion 72 (first connecting portion) to form a plate. The side surface of the spring 70 in the thickness direction (the inner peripheral side surface of the penetrating portion 720) and the side surface 490 of the adhesive convex portion 49 of the holder 40 are fixed by an adhesive.

Here, the radius of curvature of the side surface 490 of the adhesive convex portion 49 of the holder 40 is made smaller than the radius of curvature of the penetrating portion 720 of the movable body side connecting portion 72 of the plate-shaped spring 70. Therefore, in the connecting portion (first connecting portion) between the holder 40 and the plate-shaped spring 70, a portion overlapping in the direction intersecting the optical axis L direction and an optical axis around the adhesive convex portion 49 and the penetrating portion 720. At least one of the overlapping portions in the L direction is separated. However, even in that case, the holder 40 and the plate-shaped spring are located between the portion overlapping in the direction intersecting the optical axis L direction and the portion overlapping in the optical axis L direction around the adhesive convex portion 49 and the penetrating portion 720. Since the adhesive for fixing the 70 is filled, the holder 40 and the plate-shaped spring 70 can be fixed.

(Structure of the first convex portion 461 for the stopper and the second convex portion 462 for the stopper)
FIG. 10 is an explanatory view of a stopper that regulates a swing permissible range of the movable body 10 in the optical unit 100 to which the present invention is applied, and FIGS. 10 (a), (b), and (c) show the holder 40 as a subject. A plan view seen from the side (one side in the Z-axis direction + Z), an explanatory view showing how the holder 40 swings around the first axis R1, and a state where the holder 40 swings around an axis parallel to the X-axis. It is explanatory drawing which shows.

As shown in FIGS. 4 and 10A, the holder 40 is substantially quadrangular when viewed from the optical axis L direction, and therefore the movable body 10 is also substantially quadrangular when viewed from the optical axis L direction. .. In the present embodiment, in the holder 40, the outer surface of the side plate portion 45 has four side portions 40a, 40b, 40c, and 40d that form a quadrangle when viewed from the optical axis L direction. The side portion 40a is located on one side + X of the holder 40 in the X-axis direction, the side portion 40b is located on one side + Y of the holder 40 in the Y-axis direction, and the side portion 40c is located on the other side of the holder 40 in the X-axis direction. It is located on the side −X, and the side portion 40d is located on the other side −Y of the holder 40 in the Y-axis direction.

Here, on one side of the holder 40 in the optical axis L direction (one side in the Z axis direction + Z), each of the four side portions 40a, 40b, 40c, and 40d protrudes toward one side + Z in the Z axis direction. Two first convex portions 461 for stoppers are formed. Of these first convex portions for stoppers 461, the first convex portions for stoppers 461 formed on the side portion 40a are formed at two locations on both sides of the side portion 40a with the central position in the extending direction. The first convex portion 461 for the stopper has the same distance from the center position of the side portion 40a, and the same distance from the corner portions 40e and 40h located on both sides of the side portion 40a. The stopper first convex portion 461 formed on the other side portions 40a, 40b, 40c, 40d also has the same side portions 40b, 40c, 40d as the stopper first convex portion 461 formed on the side portion 40a. It is formed at the same distance from the central position.

Further, in each of the four side portions 40a, 40b, 40c, and 40d of the holder 40, one side + Z in the Z-axis direction is provided between the first convex portion 461 for the stopper and the corner portions 40e, 40f, 40g, and 40h. A second convex portion 462 for a stopper is formed. Therefore, two second convex portions 462 for stoppers are formed on each of the four side portions 40a, 40b, 40c, and 40d. Therefore, in the side portion 40a, the first convex portion 461 for the stopper and the second convex portion 462 for the stopper are formed one by one between the central position of the side portion 40a and the corner portion 40e, and the center position of the side portion 40a A first stopper 461 and a second stopper 462 are formed between the corner 40h and the corner 40h. The same applies to the other sides 40b, 40c, and 40d. Here, the stopper second convex portion 462 has a lower protrusion height in the Z-axis direction on one side + Z than the stopper first convex portion 461.

In constructing such a stopper first convex portion 461 and a stopper second convex portion 462, in the present embodiment, the stopper first convex portion 461 and the stopper first convex portion 461 and the end of the side plate portion 45 on one side + Z in the Z-axis direction are formed. A second convex portion 462 for the stopper is formed. In the present embodiment, in any of the four side portions 40a, 40b, 40c, and 40d of the holder 40, the side plate portion 45 is divided by the notch 451 in the central portion, so that the side plate portion 45 is divided by the notch 451. A first convex portion 461 for a stopper is formed on the edge of one side plate portion 45 on the notch 451 side. Therefore, on the side portions 40a, 40b, 40c, and 40d of the holder 40, two stopper first convex portions 461 are formed on both sides of the notch 451.

Further, the side plate portion 45 is formed with cutouts 452 at all of the four corner portions 40e, 40f, 40g, and 40h of the holder 40, and the cutouts of the two side plate portions 45 divided by the cutouts 451 are formed. A second convex portion 462 for a stopper is formed on the edge on the notch 452 side. Therefore, on the sides 40a, 40b, 40c, and 40d of the holder 40, two stopper second convex portions 462 are formed between the stopper first convex portion 461 and the portions 40e, 40f, 40g, and 40h. Has been done.

When the movable body 10 swings, the first convex portion 461 for the stopper and the second convex portion 462 for the stopper configured in this way come into contact with the cushion member 230 (see FIGS. 2 and 3), and the movable body 10 It constitutes a stopper 9b (see FIG. 3) that regulates the permissible swing range of the above.

For example, as shown in FIG. 10B, the movable body 10 (holder 40) rotates to one side around the first axis R1 and has a stopper first convex portion 461 and a stopper first convex portion 461 provided on the side of the corner portion 40f. When the second convex portion 462 for the stopper is displaced to one side + Z in the Z-axis direction, the first convex portion 461 for the stopper or the second convex portion for the two stoppers formed on the corner 40f side of the side portions 40b and 40c. The convex portion 462 comes into contact with the cushion member 230, and the swing of the movable body 10 is restricted. Similarly, when the movable body 10 (holder 40) rotates on the other side around the first axis R1 or around the second axis R2, the swing of the movable body 10 is restricted.

Further, as shown in FIG. 10C, the movable body 10 (holder 40) is rotated to one side around the axis extending in the X-axis direction through the center of the movable body 10 (holder 40). When the stopper first convex portion 461 and the stopper second convex portion 462 provided on the side portion 40b are displaced to one side + Z in the Z-axis direction, the two stopper first convex portions formed on the side portion 40b are formed. The portion 461 or the two stopper second convex portions 462 abut on the cushion member 230, and the swing of the movable body 10 is restricted. When the movable body 10 (holder 40) rotates to the other side around the axis extending in the X-axis direction through the center of the movable body 10 (holder 40), or through the center of the movable body 10 (holder 40). The same applies when rotating around an axis extending in the Y-axis direction.

Here, since the second convex portion 462 for the stopper is located at a position separated from the swing center from the first convex portion 461 for the stopper, the amount of movement of the second convex portion 462 for the stopper to one side + Z in the Z-axis direction. Is larger than the amount of movement of the stopper first convex portion 461 to one side + Z in the Z-axis direction, except that the protrusion height of the stopper second convex portion 462 to one side + Z in the Z-axis direction is It is lower than the first convex portion 461 for the stopper. Therefore, the swing permissible range of the movable body 10 (holder 40) can be regulated by using both the first convex portion 461 for the stopper and the second convex portion 462 for the stopper.

For example, in FIGS. 10B and 10C, the end of the stopper first convex portion 461 and the end of the stopper second convex portion 462 reached the same position on one side + Z in the Z-axis direction. Although the state is shown, when the movable body 10 (holder 40) swings around the first axis R1 or the second axis R2, the first convex portion for the stopper is before the state shown in FIG. 10B. The distance between the holder 40 and the cushion member 230 is set so that the 461 comes into contact with the cushion member 230. Further, when the movable body 10 (holder 40) rotates around an axis extending in the X-axis direction through the center of the movable body 10 (holder 40) or around an axis extending in the Y-axis direction, FIG. The distance between the holder 40 and the cushion member 230 is set so that the second convex portion 462 for the stopper comes into contact with the cushion member 230 after the state shown in c) is reached. If such conditions are set, the permissible swing range when the movable body 10 (holder 40) swings around the first axis R1 and the second axis R2, and the movable body 10 (holder 40) becomes the movable body 10 (holder 40). It is possible to set the same angle as the swing allowance range when rotating around the axis extending in the X-axis direction through the center of the holder 40) and around the axis extending in the Y-axis direction.

In this embodiment, when the movable body 10 is displaced to one side + Z in the Z-axis direction by an external force, the first convex portion 461 for the stopper comes into contact with the cushion member 230 and regulates the movable range thereof. Therefore, between the fixed body 20 and the movable body 10, the stopper 9c (1) that regulates the movable range of the movable body 10 to one side + Z in the Z-axis direction by the first convex portion 461 for the stopper and the cushion member 230 ( (See FIG. 3) is configured.

(Structure of third convex portion 466 for stopper)
On the other side −Z of the holder 40 in the Z-axis direction, a third convex portion 466 for a stopper is formed on both end faces 482 in the X-axis direction so as to project toward the other side −Z in the Z-axis direction. In the present embodiment, the stopper third convex portion 466 is formed at a position where it overlaps with the stopper first convex portion 461 in the Z-axis direction. Therefore, the holder 40 is formed with two stopper third convex portions 466 separated from each other in the Y-axis direction on one side + X in the X-axis direction and the other-X in the X-axis direction. Here, the third convex portion 466 for the stopper overlaps the stopper member 240 shown in FIGS. 2 and 4 in the Z-axis direction. Therefore, when the movable body 10 is displaced to the other side −Z in the Z-axis direction by an external force, the third convex portion 466 for the stopper comes into contact with the stopper member 240 and regulates the movable range thereof. In this way, between the fixed body 20 and the movable body 10, one side of the movable body 10 in the optical axis L direction (the other side in the Z axis direction) is provided by the third convex portion 466 for the stopper and the stopper member 240. A stopper 9d (see FIG. 3) that regulates the movable range to −Z) is configured.

(Main effect of this form)
As described above, in the optical unit 100 of the present embodiment, the movable body 10 is supported by the fixed body 20 via a support mechanism including the gimbal mechanism 30, and the movable body 10 and the fixed body 20 have a plate-shaped spring. 70 is connected. Therefore, the movable body 10 can be held in a predetermined posture by the plate-shaped spring 70 during the stop period of the drive mechanism 50.

Further, on each of the four side portions 40a, 40b, 40c, and 40d forming the quadrangle in the movable body 10, the positions where the two stopper first convex portions 461 projecting on one side + Z in the Z-axis direction are separated from each other. It is provided in. Therefore, when the movable body 10 swings, the first convex portion 461 for the stopper abuts on the cushion member 230 of the fixed body 20 from the other side −Z in the Z-axis direction, so that the movable body 10 is inside the fixed body 20. It is possible to regulate the permissible swing range of. Therefore, even if the movable body 10 swings due to the force applied from the outside, the movable body 10 does not swing excessively, so that the plate-shaped spring 70 can be prevented from being plastically deformed.

Further, since the two stopper first convex portions 461 are separated from each other on each of the four side portions 40a, 40b, 40c, and 40d, when the movable body 10 swings, one of the stopper first convex portions is separated. Since the 461 abuts on the cushion member 230, the permissible swing range can be regulated in a wide angle range around the optical axis L.

Further, since the two stopper first convex portions 461 are separated from each other via the notch 451 on each of the four side portions 40a, 40b, 40c, and 40d, the two stopper first convex portions 461 are connected. Compared to the configuration, the weight can be reduced, and members such as the movable frame 39 and the fixed body side connecting portion 71 of the plate-shaped spring 70 are arranged near the notch 451 (near the first convex portion 461 for the stopper). be able to.

Further, in the four side portions 40a, 40b, 40c, and 40d, the stopper first convex portion 461 and the corner portions 40e, 40f, 40g, and 40h are sandwiched between the first stopper portion 461 and the corner portions 40e, 40f, 40g, and 40h. A second convex portion 462 for a stopper that protrudes lower than the convex portion 461 is provided. Therefore, the permissible swing range can be appropriately regulated in a wider angle range around the optical axis L. That is, in a configuration in which the permissible swing range of the movable body 10 in each direction is equally regulated only by a total of eight stopper first convex portions 461, the stopper first convex portions 461 are arranged at regular octagonal positions. However, if the second convex portion 462 for the stopper is provided, the permissible swing range of the movable body 10 in each direction can be equally regulated without being subject to the above restrictions. For example, the first convex portion 461 for the stopper can regulate the permissible swing range when swinging around the first axis R1 or R2 around the second axis, and the second convex portion 462 for the stopper can regulate the X-axis. It is possible to regulate the permissible swing range when swinging around the axis extending in the direction or around the axis extending in the Y-axis direction. Therefore, the permissible swing range in each direction can be made equivalent.

Further, since the fixed body 20 is provided with the cushion member 230, the first convex portion 461 for the stopper and the second convex portion 462 for the stopper come into contact with the cushion member 230. Therefore, it is possible to suppress the generation of collision noise and the like.

Further, in the movable body 10, the first effective side 561 of the coil 56 always faces the S pole within the swing permissible range regulated by the first convex portion 461 for the stopper and the second convex portion 462 for the stopper. Since the two effective sides 562 always face the N pole, the posture of the movable body 10 can always be controlled by the drive mechanism 50 within the swing allowable range of the movable body 10.

Further, since the movable body 10 is provided with the third convex portion 466 for the stopper on the other side −Z of the holder 40 in the Z-axis direction, the movable range of the movable body 10 to the other side −Z in the Z-axis direction can be increased. Can be regulated. Further, since the third convex portion 466 for the stopper is separated from the fixed body 20 within the swing permissible range regulated by the first convex portion 461 for the stopper and the second convex portion 462 for the stopper, the third convex portion for the stopper is used. There is an advantage that the swing allowable range is not affected by the positional relationship between the convex portion 466 and the fixed body 20. Further, the stopper third convex portion 466 is provided on two side portions 40a, 40c facing each other among the four side portions 40a, 40b, 40c, 40d. Therefore, even when the movable body 10 swings, the two stopper third convex portions 466 come into contact with the stopper member 240. Moreover, if the two stopper third convex portions 466 abut on the stopper member 240, the stopper third convex portion 466 and the stopper third convex portion 466 are different from the case where one stopper third convex portion 466 abuts on the stopper member 240. Unnecessary movements such as the movable body 10 swinging around the point where the stopper member 240 comes into contact with the stopper member 240 can be suppressed.

Further, in the present embodiment, since the first swing fulcrum 31 and the second swing fulcrum 32 of the gimbal mechanism 30 are provided with the first contact spring 36 and the second contact spring 37, the first swing fulcrum 31 An appropriate load can be applied to the contact portion 365 in contact with the sphere 38 and the contact portion 375 in contact with the sphere 38 at the second swing fulcrum 32. Therefore, at the first swing fulcrum 31 and the second swing fulcrum 32, it is possible to swing smoothly in both directions, and the movable body 10 vibrates unnecessarily due to vibration transmitted from the outside. It can be suppressed.

Further, since the first contact spring 36 and the second contact spring 37 have the same urging force, the movable body 10 can be appropriately swung around the first swing fulcrum 31 and the second swing fulcrum 31 can be swinged appropriately. The movable body 10 can be appropriately swung around the swing fulcrum 32.

Further, since the first contact spring 36 is provided on the fixed body 20 side and the second contact spring 37 is provided on the movable body 10 side, as compared with the case where the contact spring is provided on the movable frame 39, The configuration can be simplified.

Further, since the first contact spring 36 and the second contact spring 37 have a plate shape, the contact spring can be configured with a simple structure. Further, the first contact spring 36 and the second contact spring 37 are provided with first convex portions 366, 376 and second convex portions 367, 377 located on both sides of the movable frame 39 in the optical axis L direction. Therefore, the movable range of the movable frame 39 in the optical axis direction is limited. Therefore, problems such as the contact portion 365 and 375 coming off from the movable frame 39 side due to vibration transmitted from the outside are unlikely to occur.

Further, in the present embodiment, since the first swing fulcrum 31 is configured between the cover 220 and the movable frame 39, the gimbal mechanism 30 can be configured with a small number of members.

Further, the extending portion 362 of the first contact spring 36 penetrates the cover side penetrating portion 222, and the fixing portion 361 is fixed to the step portion 224 of the cover 220 so as to overlap from one side in the optical axis L direction. .. Therefore, the first contact spring 36 can be positioned in the optical axis L direction or in a direction intersecting the optical axis L direction. Further, the extending portion 372 of the second contact spring 37 penetrates the holder side penetrating portion 47, and the fixing portion 371 is fixed to the step portion 43 of the holder 40 so as to overlap from the other side in the optical axis L direction. .. Therefore, the second contact spring 37 can be positioned in the optical axis L direction or in a direction intersecting the optical axis L direction.

Further, since the movable frame 39 can be elastically deformed in a direction orthogonal to the optical axis L direction, a load can be applied to the contact portions 365 and 375 by the spring force of the movable frame 39. In addition, vibration can be absorbed by the elastic deformation of the movable frame 39. Further, by optimizing the natural frequency of the movable frame 39, the combined elastic force of the elastic force of the movable frame 39 and the elastic force of the contact springs (first contact spring 36 and second contact spring 37) is combined. The natural frequency fa in the optical axis L direction and the natural frequency fb in the direction orthogonal to the optical axis L direction of the combined elastic force, and the maximum frequency fc in the frequency band of disturbance (vibration transmitted from the outside) is as follows. Relationship fc <fa <fb
By doing so, vibration due to disturbance can be suppressed.

Further, although the drive mechanism 50 is a magnetic drive mechanism, since the movable frame 39, the spring 36 for the first contact and the spring 37 for the second contact are made of a non-magnetic material, the movable frame 39, the spring 36 for the first contact and the first contact It is possible to prevent the two-contact spring 37 from having a magnetic effect on the drive mechanism 50 (magnetic drive mechanism).

Further, in the present embodiment, since the side surface 490 of the adhesive convex portion 49 extending in the optical axis L direction and the side surface of the plate-shaped spring 70 in the holder 40 are adhered by an adhesive, the plate-shaped spring with respect to the cover 220. There is an advantage that the posture range of 70 is wide. Further, since the plate-shaped spring 70 is formed with a penetrating portion 720 into which the convex portion 49 for adhesion is fitted, the bonding range is wide. Therefore, the holder 40 and the plate-shaped spring 70 can be reliably adhered to each other.

Further, in the plate-shaped spring 70, the root portion where the movable body side connecting portion 72 and the arm portion 73 are connected is fixed to the holder 40 by an adhesive. Therefore, even if the movable body side connecting portion 72 extends in the circumferential direction, only the arm portion 73 elastically deforms, so that the movable body side connecting portion 72 elastically deforms and exerts an urging force on the movable body 10. It is possible to avoid applying it.

Further, in the plate-shaped spring 70, the root portion where the fixed body side connecting portion 71 and the arm portion 73 are connected is fixed to the cover 220 by an adhesive. Therefore, even if the fixed body side connecting portion 71 extends in the circumferential direction, only the arm portion 73 elastically deforms, so that the fixed body side connecting portion 71 elastically deforms and exerts an urging force on the movable body 10. It is possible to avoid applying it.

Further, the connecting portion between the holder 40 on the movable body 10 side and the plate-shaped spring 70 and the connecting portion between the cover 220 on the fixed body 20 side and the plate-shaped spring 70 are at the same angle position about the optical axis L. It is provided. Therefore, a sufficient space for providing the arm portion 73 can be secured.

[Another Embodiment]
FIG. 11 is an explanatory diagram of the drive mechanism 50 used in the optical unit 100 according to another embodiment of the present invention, and FIGS. 11 (a), (b), (c), (d), and (e). , (F) are an explanatory diagram of the non-bent coil 56, an explanatory diagram of the drive mechanism 50 using the non-bent coil 56, an explanatory diagram of the bent coil 56, and a description of the drive mechanism 50 using the bent coil 56. It is the figure, the explanatory view of the drive mechanism 50 using a bent magnet 52, and the explanatory view of the drive mechanism 50 using a bent coil 56 and a bent magnet 52.

In the above embodiment, as shown in FIGS. 11A and 11B, the magnet 52 is a flat plate, and the coil 56 is an air-core coil that is not bent. On the other hand, in the present embodiment, as described below with reference to FIGS. 11 (c) and 11 (f), the surface of the coil 56 facing the magnet 52 and the surface of the magnet 52 facing the coil 56. At least one of the two is bent in the direction along the swing locus of the movable body 10.

For example, in the form shown in FIGS. 11C and 11D, the magnet 52 provided on the fixed body 20 has a flat plate shape, and the surface of the coil 56 held by the movable body 10 facing the magnet 52 is movable. It is bent in the direction along the swing locus of the body 10. In such a configuration, after the flat plate coil 56 as shown in FIG. 11A is manufactured, the first effective side 561 and the second effective side 562 are formed between the first effective side 561 and the second effective side 562. Is bent to the side opposite to the side where the magnet 52 is located.

According to this configuration, as shown in FIG. 11D, when the movable body 10 swings, the coil 56 moves along the bent shape of the coil 56. Therefore, even if the movable body 10 swings, the distance between the coil 56 and the magnet 52 does not change significantly, so that the drive mechanism 50 can stably drive the movable body 10. Further, when the movable body 10 swings, the distance d1 in which the coil 56 provided in the movable body 10 is displaced toward the magnet 52 provided in the fixed body 20 is short. On the other hand, as shown in FIG. 11B, when the coil 56 has a flat plate shape, when the movable body 10 swings, the end portion of the coil 56 moves a large distance d2 toward the magnet 52. .. Therefore, in the configurations shown in FIGS. 11C and 11D, the coil 56 and the magnet 52 are unlikely to interfere with each other even if the distance between the coil 56 and the magnet 52 is set to be narrow.

Further, in the form shown in FIG. 11 (e), the surface of the magnet 52 provided on the fixed body 20 facing the coil 56 is bent in the direction along the swing locus of the movable body 10. On the other hand, the coil 56 provided in the movable body 10 has a flat plate shape. According to this configuration, when the movable body 10 swings, the coil 56 moves along the curved shape of the magnet 52. Therefore, even if the movable body 10 swings, the distance between the coil 56 and the magnet 52 does not change significantly, so that the drive mechanism 50 can stably drive the movable body 10.

Further, in the form shown in FIG. 11F, the surface of the magnet 52 provided on the fixed body 20 facing the coil 56 is curved in the direction along the swing locus of the movable body 10. Further, the surface of the coil 56 provided on the movable body 10 facing the magnet 52 is bent in a direction along the swing locus of the movable body 10. Therefore, even if the movable body 10 swings, the distance between the coil 56 and the magnet 52 does not change significantly, so that the drive mechanism 50 can stably drive the movable body 10. Further, when the movable body 10 swings, the distance that the coil 56 provided in the movable body 10 is displaced toward the magnet 52 provided in the fixed body 20 is short. Therefore, even if the distance between the coil 56 and the magnet 52 is set to be narrow, the coil 56 and the magnet 52 are unlikely to interfere with each other.

Also in this embodiment, in the movable body 10, the first effective side 561 of the coil 56 is always set to the S pole within the swing allowable range regulated by the first convex portion 461 for the stopper and the second convex portion 462 for the stopper. Since the second effective side 562 is always opposed to the N pole, the posture of the movable body 10 can always be controlled by the drive mechanism 50 within the swing allowable range of the movable body 10.

[Other Configuration Examples of Optical Unit 100]
In the above embodiment, the example in which the present invention is applied to the optical unit 100 used for a mobile phone with a camera has been described, but the present invention may be applied to the optical unit 100 used for a thin digital camera or the like.

Further, the optical unit 100 with a shake correction function to which the present invention is applied may be configured as an action camera or a wearable camera mounted on a helmet, a bicycle, a radio-controlled helicopter, or the like. Such a camera is used for shooting in a situation where a large shake occurs, but according to the present invention, the shake can be corrected, so that a high-quality image can be obtained.

Further, the optical unit 100 with a shake correction function to which the present invention is applied is fixed in a device having vibration at regular intervals, such as a mobile phone or a digital camera, as well as a refrigerator, so that it can be remotely controlled. It can also be used for a service that allows information on the inside of the refrigerator to be obtained when going out, for example, when shopping. In such a service, since the camera system is equipped with a posture stabilizing device, it is possible to transmit a stable image even if the refrigerator vibrates. In addition, the device may be fixed to a device worn when commuting to school, such as a child's or student's bag, school bag or hat. In this case, if the surroundings are photographed at regular intervals and the image is transferred to a predetermined server, the guardian or the like can observe the image at a remote place to ensure the safety of the child. In such an application, it is possible to take a clear image even if there is vibration during movement without being aware of the camera. In addition to the camera module, if GPS is installed, the position of the target person can be acquired at the same time, and in the unlikely event of an accident, the location and situation can be confirmed instantly.

Further, if the optical unit 100 with a shake correction function to which the present invention is applied is mounted at a position where the front can be photographed in an automobile, it can be used as an in-vehicle monitoring device such as a drive recorder. In addition, the optical unit 100 with a shake correction function to which the present invention is applied is mounted at a position where the front can be photographed in an automobile, and the surrounding images are automatically photographed at regular intervals and automatically transferred to a predetermined server. May be good. Further, by distributing this image in conjunction with the traffic jam information of the vehicle information and communication system, it is possible to provide the traffic jam situation in more detail. According to such a service, it is possible for a third party who has passed by unintentionally to record the situation at the time of an accident and use it for checking the situation, as in the case of a drive recorder mounted on a car. In addition, a clear image can be acquired without being affected by the vibration of the automobile. In the case of such an application, when the power is turned on, a command signal is output to the control unit, and runout control is started based on the command signal.

Further, the optical unit 100 with a runout correction function to which the present invention is applied can be applied to runout correction of an optical device that emits light, such as a laser pointer, a projection display device for a portable or an in-vehicle device, or a direct-view display device. Good. Further, it may be used for observing at a high magnification such as an astronomical telescope system or a binocular system without using an auxiliary fixing device such as a tripod. In addition, by using a sniper rifle or a tank such as a tank, the posture can be stabilized against vibration at the time of triggering, so that the accuracy of hitting can be improved.

10 ... Movable body, 11 ... Lens holder, 20 ... Fixed body, 30 ... Gimbal mechanism (support mechanism), 31 ... 1st swing fulcrum, 32 ... 2nd swing fulcrum, 36 ... Spring for 1 contact, spring for 2nd contact, 38 ... sphere, 39 ... movable frame, 40 ... holder, 40a, 40b, 40c, 40d ... side, 40e, 40f, 40g, 40h ...・ Square part, 41 ・ ・ Cylindrical part, 42 ・ ・ Base part, 44 ・ ・ Coil holding part, 45 ・ ・ Side plate part, 50 ・ ・ Drive mechanism, 52 ・ ・ Magnet, 56 ・ ・ Coil, 70 ・ ・ Plate shape Spring, 71 ... Fixed body side connecting part, 72 ... Movable body side connecting part, 73 ... Arm part, 100 ... Optical unit, 210 ... First case, 220 ... Cover, 227 ... Adhesive convex part, 230 ... Cushion member, 240 ... Stopper member, 250 ... Second case, 260 ... Bottom plate, 361, 371 ... Fixed part, 362, 372 ... Extended part, 363, 373 ... Folded part, 365 , 375 ... Contact part, 391 ... 1st corner part, 392 ... 2nd corner part, 393 ... 3rd corner part, 394 ... 4th corner part, 461 ... 1st convex part for stopper, 462 ...・ 2nd convex part for stopper 466 ・ ・ 3rd convex part for stopper, 561 ・ ・ 1st effective side, 562 ・ ・ 2nd effective side, 1000 ・ ・ Optical equipment, L ・ ・ Optical axis, R1 ・ ・ No. 1st axis, R2 ... 2nd axis

Claims (8)

A movable body that holds an optical element and has four sides that form a quadrangle when viewed from the optical axis direction.
A fixed body that swingably supports the movable body via a support mechanism,
A plate-shaped spring connected to the movable body and the fixed body,
A drive mechanism that swings the movable body and
Have,
On one side in the optical axis direction, the movable body protrudes toward each of the four side portions toward the one side in the optical axis direction, and when the movable body swings, the movable body is attached to the fixed body. Two first convex portions for stoppers that regulate the allowable swing range of the movable body by abutting from the other side in the optical axis direction are provided at positions separated in the extending direction of the side portions.
On the other side in the optical axis direction, the movable body includes a third convex portion for a stopper that projects toward the other side in the optical axis direction.
The third convex portion for the stopper abuts on the fixed body when the movable body is displaced to the other side in the optical axis direction, whereby the movable range of the movable body toward the other side in the optical axis direction is reached. Regulate,
An optical unit with a runout correction function, characterized in that the third convex portion for a stopper and the fixed body are separated from each other within the allowable swing range. The fixed body is provided with a cover on one side of the movable body in the optical axis direction.
Claim 1 is characterized in that a cushion member is provided on the other side surface of the cover in the optical axis direction with which the first convex portion for a stopper abuts when the movable body swings. Optical unit with runout correction function described in. The optical with a runout correction function according to claim 1 or 2, wherein the stopper third convex portion is provided on each of the two opposing side portions of the four side portions. unit. The driving mechanism includes a magnet provided on one of the fixed body and the movable body, and a coil provided on the other of the fixed body and the movable body. The optical unit with a runout correction function according to any one of 3. In the magnet, the portions adjacent to each other in the optical axis direction on the surface side facing the coil are S pole and N pole.
The coil has a first effective side extending parallel to the polarization line of the magnet and facing the S pole, and a second effective side extending parallel to the polarization line and facing the N pole. With
4. The fourth aspect of the present invention is characterized in that the first effective side always faces the S pole and the second effective side always faces the N pole within the swing permissible range of the movable body. The described optical unit with runout correction function. According to claim 4 or 5, at least one of the surface of the coil facing the magnet and the surface of the magnet facing the coil is bent in a direction along the swing locus of the movable body. The described optical unit with runout correction function. Among the coil and the magnet, in the member provided on the movable body, the surface facing the member provided on the fixed body is bent in a direction along the swing locus of the movable body. The optical unit with a runout correction function according to claim 6. The coil is held on the movable body side and is held.
The magnet is held on the fixed body side and
The optical unit with a runout correction function according to claim 7, wherein the surface of the coil facing the magnet is bent in a direction along a swing locus of the movable body.

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