JP7733973B2 - Optical unit with shake correction function and method for manufacturing optical unit with shake correction function - Google Patents

Description

The present invention relates to an optical unit with a shake correction function that corrects shake in an optical module, and a method for manufacturing the same.

Some optical units mounted on mobile devices or mobile objects are equipped with a mechanism that corrects shake by swinging or rotating the movable body on which the optical module is mounted, in order to reduce distortion in captured images when the mobile device or mobile object is moving. Patent Document 1 discloses this type of optical unit with shake correction function.

The optical unit with shake correction function described in Patent Document 1 includes a flexible printed circuit board connected to a movable body on which an optical module is mounted. The flexible printed circuit board includes a power supply line to the optical module and a signal line for extracting signals from the optical module to the outside. The flexible printed circuit board is routed in a shape that allows the movable body to oscillate and rotate.

JP 2018-169499 A

In Patent Document 1, the flexible printed circuit board is routed in a U-shaped bend behind the optical module in the optical axis direction, and then pulled out radially outward from the fixed body surrounding the optical module. By providing a bent portion midway through the flexible printed circuit board, it is possible to suppress an increase in the swing load caused by resistance when the flexible printed circuit board moves in response to swinging of the movable body. However, locating the bent portion of the flexible printed circuit board behind the optical module in the optical axis direction increases the height of the optical unit with shake correction function in the optical axis direction, which is disadvantageous for slimming down the device.

In order to reduce the thickness of the optical unit with shake correction function, the applicant has proposed pulling the flexible printed circuit board out from the optical module in a direction perpendicular to the optical axis direction and folding it back on the outer periphery of the optical module to create a U-shaped folded section. In addition, in order to reduce the oscillation load on the movable body, the applicant has proposed folding the flexible printed circuit board back not just once but multiple times.

However, simply increasing the number of times the flexible printed circuit board is folded will only suppress the increase in the oscillation load around an axis parallel to the direction in which the flexible printed circuit board is pulled out, but will not suppress the increase in the oscillation load around an axis perpendicular to the direction in which the flexible printed circuit board is pulled out. Therefore, with a movable body that swings around two axes, there is a problem in that the increase in the oscillation load cannot be suppressed depending on the direction of swing.

Furthermore, the portion where the flexible printed circuit board is folded multiple times and stacked is thick in the optical axis direction, and also significantly warps in the optical axis direction when the flexible printed circuit board swings about an axis perpendicular to the direction in which it is pulled out. Therefore, in order to avoid collisions between the flexible printed circuit board and other components and to suppress increases in swing load, the height of the space in which the flexible printed circuit board is placed must be increased in the optical axis direction. This poses a problem of requiring a larger space for placing the flexible printed circuit board.

In view of these points, the objective of the present invention is to suppress the increase in swing load due to the resistance of the flexible printed circuit board when the movable body on which the optical module is mounted swings around two intersecting axes, while also reducing the space required for arranging the flexible printed circuit board.

In order to solve the above problem, the optical unit with shake correction function of the present invention comprises a movable body equipped with an optical module, a swing support mechanism that supports the movable body so that it can swing about a first axis that intersects with an optical axis and supports the movable body so that it can swing about a second axis that intersects with the optical axis and the first axis, a fixed body that supports the movable body via the swing support mechanism, a swing magnetic drive mechanism that swings the movable body about the first axis and the second axis, and a flexible printed circuit board connected to the movable body, wherein the flexible printed circuit board comprises a fixed part that is fixed directly or indirectly to the fixed body, a first part that is provided between a part connected to the movable body and the fixed part and extends along the movable body in the optical axis direction, and a first folded part that is provided between the first part and the fixed part and extends in a direction that intersects with the optical axis and is folded back in the opposite direction.

According to the present invention, the flexible printed circuit board connected to the movable body has a fixed portion that is fixed directly or indirectly to the fixed body, and the portion routed between the fixed portion and the movable body has a first portion extending in the optical axis direction and a first folded portion that extends in a direction intersecting the optical axis and is folded back in the opposite direction. Therefore, when the movable body swings in either direction around the first axis or the second axis, at least one of the first portion and the first folded portion can easily bend. Therefore, when the movable body swings in either direction around the first axis or the second axis that intersect with the optical axis and mutually intersect, an increase in the swing load of the movable body due to the resistance of the flexible printed circuit board can be suppressed. This can suppress an increase in power consumption.

Furthermore, according to the present invention, since the device is provided with a first portion that extends in a direction intersecting the first folded portion, the amount of warping of the first folded portion in the optical axis direction when the movable body swings is small. This allows for a reduction in the space required for arranging the flexible printed circuit board.

In the present invention, it is preferable that the first folded portion extend radially away from the oscillation center of the movable body, then fold back in the opposite direction and extend radially toward the oscillation center. This makes it easier to bend the side closer to the movable body, thereby reducing the resistance of the flexible printed circuit board when the movable body oscillates. This therefore makes it possible to suppress an increase in the oscillation load.

In the present invention, it is preferable that the first folded portion be bent in a direction approaching the oscillation center in the optical axis direction and then folded back in the opposite direction. This allows the first folded portion to be brought closer to the oscillation center in the optical axis direction. Therefore, it is possible to further reduce the resistance of the flexible printed circuit board when the movable body oscillates around an axis line intersecting the optical axis. Therefore, it is possible to suppress an increase in the oscillation load.

In the present invention, it is preferable that the first folded portion has a first extension portion and a second extension portion that overlap when viewed from the optical axis direction, and that a first spacer is disposed between the first extension portion and the second extension portion. This ensures a gap between the first extension portion and the second extension portion. This makes it possible to suppress increased resistance and damage due to contact between flexible printed circuit boards.

In the present invention, the flexible printed circuit board preferably has a plurality of the first folded portions. Here, "having a plurality of first folded portions" may mean a configuration having a plurality of folded portions that fold in the same direction, or a configuration having a plurality of folded portions that fold in opposite directions, alternating with each other. For example, the flexible printed circuit board may be configured to fold once and then fold again in the opposite direction. This can further reduce the resistance of the flexible printed circuit board when the movable body oscillates. Therefore, it is possible to suppress an increase in the oscillation load.

In the present invention, it is preferable that the flexible printed circuit board has a second folded portion that extends in the optical axis direction and is folded back once in the opposite direction, and that the second folded portion includes the first portion. In this way, by providing a second folded portion that extends in a direction intersecting the first folded portion in addition to the first folded portion, it is possible to further reduce the resistance of the flexible printed circuit board when the movable body oscillates. Therefore, it is possible to suppress an increase in the oscillation load.

In this case, it is preferable that the second folded portion has a third extension portion and a fourth extension portion that overlap when viewed from a direction perpendicular to the optical axis, and that a second spacer is disposed between the third extension portion and the fourth extension portion. In this way, a gap can be secured between the third extension portion and the fourth extension portion. This makes it possible to suppress increased resistance and damage due to contact between flexible printed circuit boards.

In this case, it is preferable that the flexible printed circuit board has a plurality of the second folded portions. Here, "having a plurality of second folded portions" may mean a configuration having a plurality of folded portions that fold in the same direction, or a configuration having alternating folded portions that fold in opposite directions. For example, the flexible printed circuit board may be configured to fold once and then fold again in the opposite direction. In this way, the resistance of the flexible printed circuit board when the movable body oscillates can be reduced. Therefore, an increase in the oscillation load can be suppressed.

In the present invention, it is preferable that the flexible printed circuit board has an extension portion that is extended from the movable body in a direction intersecting the optical axis, and that at least a portion of the second folded portion that bends and extends from the extension portion in the optical axis direction is fixed to the movable body. In this way, the second folded portion can be maintained in a position extending in the optical axis direction. Therefore, since the second folded portion can be maintained in a position extending in a direction intersecting the first folded portion, the resistance of the flexible printed circuit board when the movable body swings can be reduced.

In the present invention, the fixing portion is preferably fixed to the fixing body via a third spacer. This ensures a gap between the fixing body and the flexible printed circuit board. This prevents increased resistance and damage due to contact between the fixing body and the flexible printed circuit board.

In the present invention, the flexible printed circuit board preferably has slits extending in a direction intersecting the width direction. This reduces the resistance when the flexible printed circuit board bends, thereby suppressing an increase in the oscillation load of the movable body.

In the present invention, it is preferable that the movable body includes a first opposing portion and a second opposing portion spaced apart in a direction intersecting the optical axis, and the first portion is disposed between the first opposing portion and the second opposing portion. In this way, the range of movement of the first portion can be restricted, thereby suppressing excessive deformation of the flexible printed circuit board.

Alternatively, in the present invention, the movable body preferably comprises a first opposing portion and a second opposing portion spaced apart in a direction intersecting the optical axis, the first portion being disposed between the first opposing portion and the second opposing portion, the second opposing portion being disposed on the outer periphery of the first opposing portion, and the second opposing portion being disposed within a range overlapping with the second spacer when viewed from a direction perpendicular to the optical axis. This restricts the range of movement of the first portion, thereby preventing excessive deformation of the flexible printed circuit board. Furthermore, the second folded portion can move freely without being restricted by the second opposing portion except for the portion where the second spacer is provided, thereby reducing the resistance of the flexible printed circuit board when the movable body swings. Furthermore, since the range in which the second opposing portion is provided is small, the movable body can be made smaller and lighter.

In the present invention, the second spacer preferably includes a third reinforcing plate fixed to the third extension portion and a fourth reinforcing plate fixed to the fourth extension portion, the movable body preferably includes a holder surrounding the outer periphery of the optical module, the holder preferably including grooves in which the ends of the third reinforcing plate and the fourth reinforcing plate protruding from between the third and fourth extension portions are disposed, and the grooves preferably including positioning portions for positioning the third and fourth reinforcing plates in the optical axis direction. This allows the third and fourth reinforcing plates to be positioned in the optical axis direction and in a direction intersecting the optical axis direction. Furthermore, by positioning the third and fourth reinforcing plates in the optical axis direction, the third and fourth extension portions can be positioned in the optical axis direction. Therefore, variation in the bending position of the second folded portion can be suppressed, thereby suppressing variation in the position of the flexible printed circuit board routed between the second folded portion and the fixed portion in the optical axis direction.

In the present invention, the groove preferably includes a reinforcing plate holding portion into which the end of the third reinforcing plate and the end of the fourth reinforcing plate fit, and a guide portion whose groove width widens toward the opposite side from the reinforcing plate holding portion. This allows the third and fourth reinforcing plates to be inserted into the guide portion while bending the second folded portion. Furthermore, by inserting the third and fourth reinforcing plates from the guide portion into the reinforcing plate holding portion, the second folded portion can be completely folded. Therefore, the second folded portion can be easily folded and positioned.

In the present invention, it is preferable that the end of the third reinforcing plate and the end of the fourth reinforcing plate are press-fitted into the reinforcing plate holding portion. This prevents variation in the positions of the third reinforcing plate and the fourth reinforcing plate in a direction intersecting the optical axis direction, and prevents variation in the position of the second folded portion in a direction intersecting the optical axis direction. Furthermore, because the third reinforcing plate and the fourth reinforcing plate can be held in the groove portion, deviation in the position of the second folded portion can be prevented.

In the present invention, the flexible printed circuit board preferably has a bent portion including the first portion and a second portion bent from the first portion in a direction intersecting the optical axis, and a shape-retaining component that maintains the shape of the bent portion is fixed to the bent portion. This prevents the bent portion from opening over time, thereby preventing the shape of the flexible printed circuit board from changing over time and causing the initial position of the movable body to change. This reduces adverse effects on the characteristics of the optical unit with shake correction function. Furthermore, because there is no need to plastically deform the flexible board to prevent the bent portion from opening, damage to the bending position can be reduced. This reduces fatigue breakage of wiring on the board due to bending.

In the present invention, the shape-retaining component is preferably a bent plate including a first plate portion fixed to the first portion and a second plate portion extending in a direction intersecting the first plate portion and fixed to the second portion. This allows the shape-retaining component to be made thinner and requires less space for installation. Therefore, interference between the shape-retaining component and the movable body or the fixed body can be suppressed.

In the present invention, the bent plate preferably has first notches formed at both ends of the edge of the first plate portion opposite the second plate portion, and second notches formed at both ends of the edge of the second plate portion opposite the first plate portion. This makes it possible to suppress an increase in the spring constant of the flexible printed circuit board caused by attaching the bent plate, thereby suppressing adverse effects on shake correction.

In the present invention, it is preferable that the bent plate has an opening. This allows the bent plate to be made lighter. In addition, the opening can be used as an adhesive reservoir.

In the present invention, the bent plate is preferably positioned inside the bent portion. This allows the bent plate to be positioned on the opposite side of the movable body, thereby preventing the bent plate from interfering with the movable body.

Next, the present invention is a manufacturing method for the optical unit with image stabilization function described above, characterized in that, before the second folded portion is folded back, a third reinforcing plate is fixed to a portion of the flexible printed circuit board that constitutes the third extension portion, a fourth reinforcing plate is fixed to a portion of the flexible printed circuit board that constitutes the fourth extension portion, and the third reinforcing plate and the fourth reinforcing plate are abutted in a direction intersecting the optical axis to align the positions of the third reinforcing plate and the fourth reinforcing plate in the optical axis direction , thereby folding back the second folded portion at a predetermined bending position . In this way, by using the third reinforcing plate and the fourth reinforcing plate, the second folded portion can be easily and accurately folded back at the predetermined bending position. Furthermore, because the third reinforcing plate and the fourth reinforcing plate can be used as second spacers, a second spacer can be easily disposed between the third extension portion and the fourth extension portion.

In the present invention, it is preferable that the movable body includes a holder that surrounds the outer periphery of the optical module, and that the ends of the third and fourth reinforcing plates are inserted into grooves formed in the holder, and the ends of the third and fourth reinforcing plates are abutted against positioning portions provided in the grooves, thereby aligning the positions of the third and fourth reinforcing plates in the optical axis direction. In this way, the positions of the third and fourth reinforcing plates can be easily aligned in the optical axis direction. Furthermore, because the third and fourth reinforcing plates can be held by the grooves, the second folded portion can be maintained in its folded shape.

In the present invention, it is preferable to insert the ends of the third reinforcing plate and the fourth reinforcing plate into the grooves to align their positions in the optical axis direction, and then pour adhesive into the grooves. In this way, the third reinforcing plate and the fourth reinforcing plate can be fixed to the grooves. This prevents or suppresses the second folded portion from coming out of the grooves, and prevents or suppresses the second folded portion from shifting position.

According to the present invention, the flexible printed circuit board connected to the movable body includes a fixed portion fixed directly or indirectly to the fixed body, and the portion routed between the fixed portion and the movable body includes a first portion extending in the optical axis direction and a first folded portion extending in a direction intersecting the optical axis and folded back in the opposite direction. Therefore, when the movable body swings in either direction around the first axis or the second axis, at least one of the first portion and the first folded portion can easily bend. Therefore, when the movable body swings in either direction around the first axis or the second axis intersecting the optical axis, an increase in the swing load of the movable body due to the resistance of the flexible printed circuit board can be suppressed. Therefore, an increase in power consumption can be suppressed. Furthermore, because the flexible printed circuit board includes not only the first folded portion but also a first portion extending in a direction intersecting the first folded portion, the amount of warping of the first folded portion in the optical axis direction when the movable body swings is small. Therefore, the installation space for the flexible printed circuit board can be reduced.

1 is a perspective view of an optical unit with a shake correction function to which the present invention is applied. FIG. 2 is a partial cross-sectional view of the optical unit with shake correction function of FIG. 1 (a partial cross-sectional view taken along the line AA of FIG. 1). FIG. 2 is a perspective view of a flexible printed circuit board. FIG. 2 is a development view of a flexible printed circuit board before assembly. FIG. 10 is a partial cross-sectional view showing a holding structure of the second folded portion. 1 is an explanatory diagram of an arrangement space of a flexible printed circuit board to which the present invention is applied; FIG. 10 is an explanatory diagram of the arrangement space of a flexible printed circuit board according to a comparative example; FIG. 10 is an explanatory diagram of a flexible printed circuit board according to a first modified example. FIG. 10 is an explanatory diagram of a flexible printed circuit board according to a second modified example. FIG. 10 is an explanatory diagram of a flexible printed circuit board according to a third modified example. FIG. 10 is a perspective view of a flexible printed circuit board and a movable body according to a fourth modified example. FIG. 10 is an exploded perspective view of a flexible printed circuit board and a movable body according to a fourth modified example. FIG. 13 is a bottom view of a flexible printed circuit board and a movable body according to a fourth modified example. FIG. 10 is a cross-sectional view of a third reinforcing plate, a fourth reinforcing plate, and a groove portion. 10A and 10B are explanatory diagrams of a step of folding and positioning the second folded portion. FIG. 2 is a perspective view of a bending portion and a shape-retaining part of the flexible printed circuit board. 10 is a perspective view of a bent portion of a flexible printed circuit board and a shape-retaining part of a modified example. FIG.

An embodiment of an optical unit 1 with shake correction function to which the present invention is applied will be described below with reference to the drawings. In this specification, the three axes X, Y, and Z are mutually orthogonal, with one side in the X-axis direction indicated as +X and the other side indicated as -X, one side in the Y-axis direction indicated as +Y and the other side indicated as -Y, and one side in the Z-axis direction indicated as +Z and the other side indicated as -Z. The Z-axis direction coincides with the optical axis L direction of the optical module 2. Furthermore, the -Z direction is the rear side (image side) of the optical axis L direction, and the +Z direction is the front side (subject side) of the optical axis L direction.

(Overall structure)
FIG. 1 is a perspective view of an optical unit 1 with shake correction function to which the present invention is applied. FIG. 2 is a partial cross-sectional view of the optical unit 1 with shake correction function of FIG. 1 (a partial cross-sectional view taken along the line A-A in FIG. 1 ). The optical unit 1 with shake correction function includes an optical module 2 equipped with optical elements such as lenses. The optical unit 1 with shake correction function is used in optical devices such as camera-equipped mobile phones and dashcams, as well as optical devices such as action cameras and wearable cameras mounted on moving objects such as helmets, bicycles, and radio-controlled helicopters. In such optical devices, if the optical device shakes during shooting, the captured image will be distorted. To prevent tilting of the captured image, the optical unit 1 with shake correction function corrects the tilt of the optical module 2 based on the acceleration, rotational speed, amount of shake, etc. detected by a detection means such as a gyroscope.

The optical unit 1 with shake correction function includes a movable body 3 on which an optical module 2 is mounted, a swing support mechanism 4 that swingably supports the movable body 3, a fixed body 5 that supports the movable body 3 via the swing support mechanism 4, a swing magnetic drive mechanism 6 that swings the movable body 3 relative to the fixed body 5, and a flexible printed circuit board 7 connected to the movable body 3. The flexible printed circuit board 7 has a connector section 8 for connection to an external device at an end opposite to the end connected to the movable body 3. The end where the connector section 8 is provided is drawn out from the fixed body 5 to the front side in the optical axis L direction (+Z direction).

The optical unit 1 with shake correction function performs shake correction by swinging the movable body 3 around two axes (X-axis and Y-axis) that intersect with the optical axis L (Z-axis) and that also intersect with each other. By performing shake correction around the X-axis and Y-axis, shake correction in the pitching (vertical shaking) direction and shake correction in the yawing (horizontal shaking) direction can be performed.

(Swing support mechanism)
The movable body 3 is supported by the swing support mechanism 4 so as to be swingable about a first axis R1 perpendicular to the optical axis L (Z-axis), and also swingable about a second axis R2 perpendicular to the optical axis L and the first axis R1. The first axis R1 and the second axis R2 are inclined at 45 degrees with respect to the X-axis and the Y-axis. By combining the rotation about the first axis R1 and the rotation about the second axis R2, the movable body 3 can swing about the X-axis and the Y-axis. Therefore, the movable body 3 is supported by the swing support mechanism 4 so as to be swingable about the X-axis and the Y-axis.

The swing support mechanism 4 includes a first swing support member 41 provided at a diagonal position on the first axis R1 of the movable body 3, a second swing support member 42 provided at a diagonal position on the second axis R2 of the fixed body 5, and a movable frame (not shown). The movable frame is, for example, a leaf spring, and includes two fulcrum members provided at diagonal positions on the first axis R1 and two fulcrum members provided at diagonal positions on the second axis R2. By arranging these four fulcrum members on the first swing support member 41 and the second swing support member 42, the movable body 3 is supported via the movable frame so that it can swing about the first axis R1 and about the second axis R2. The swing center P of the movable body 3 is the intersection of the first axis R1 and the second axis R2.

(Magnetic drive mechanism for swinging)
The swing magnetic drive mechanism 6 includes a first magnetic drive mechanism 6X that rotates the movable body 3 about the X-axis, and a second magnetic drive mechanism 6Y that rotates the movable body 3 about the Y-axis. The first magnetic drive mechanism 6X and the second magnetic drive mechanism 6Y each include a magnet provided on the movable body 3 and a coil provided on the fixed body 5. The coil and magnet of the first magnetic drive mechanism 6X face each other in the Y-axis direction, and the coil and magnet of the second magnetic drive mechanism 6Y face each other in the X-axis direction. The first magnetic drive mechanism 6X generates a magnetic drive force about the X-axis when current is applied to its coil. The second magnetic drive mechanism 6Y generates a magnetic drive force about the Y-axis when current is applied to its coil.

(fixed body)
The fixed body 5 includes an outer frame 50 that surrounds the movable body 3, and a wire accommodating portion 51 that protrudes outward from a rear portion (-Z direction) of the outer frame 50 in the optical axis L direction. In this embodiment, the outer frame 50 is rectangular when viewed in the optical axis L direction, and the wire accommodating portion 51 protrudes from the outer frame 50 in the +Y direction. The outer frame 50 and the wire accommodating portion 51 have approximately the same width in the X-axis direction. The outer frame 50 includes sidewalls 501 and 502 that face each other in the X-axis direction, and sidewalls 503 and 504 that face each other in the Y-axis direction. The outer frame 50 includes an opening 52 that is formed by cutting out the central portion of the +Y-direction sidewall 503 in the X-axis direction. The opening 52 faces the wire accommodating portion 51.

The flexible printed circuit board 7 is drawn out toward the +Y direction side of the movable body 3 arranged inside the outer frame portion 50, and extends from the opening 52 into the inside of the wiring accommodating portion 51. The wiring accommodating portion 51 includes frame portions 511 and 512 extending in the +Y direction from side wall portions 501 and 502 on both sides of the outer frame portion 50 in the X-axis direction, a frame portion 513 extending in the X-axis direction from the +Y direction end of the frame portion 511 to the +Y direction end of the frame portion 512, and an upper plate portion 514 covering the +Z direction of the space surrounded by the frame portions 511, 512, and 513. The upper plate portion 514 includes a rectangular cutout portion 53 cut out in the +Y direction from its -Y direction edge with the same width as the opening 52. The flexible printed circuit board 7 is routed inside the wiring housing portion 51 , then bent forward in the optical axis L direction (+Z direction) and drawn out of the wiring housing portion 51 through the cutout portion 53 .

(movable body)
The movable body 3 includes an optical module 2 and a holder 30 that holds the optical module 2. A first swing support portion 41 of the swing support mechanism 4 is provided at a diagonal position on the first axis R1 of the holder 30. The holder 30 includes an inner holder 31 that is provided with a holding hole in which the optical module 2 is placed, and a frame-shaped outer holder 32 that surrounds the inner holder 31. The inner holder 31 is fixed to the outer holder 32, and the first swing support portion 41 is provided on the outer holder 32.

The outer holder 32 includes a first frame portion 33 disposed in the +Y direction of the inner holder 31. The outer holder 32 is in contact with the inner holder 31 at a portion that surrounds the inner holder 31 in three directions, i.e., the -Y direction, the +X direction, and the -X direction. Meanwhile, the first frame portion 33 of the outer holder 32 has a central portion in the X-axis direction that protrudes in the +Y direction, and a gap S is provided between the first frame portion 33 and a side surface 311 of the inner holder 31 in the +Y direction (see FIG. 2). As will be described later, a folded portion of the flexible printed circuit board 7 is disposed in the gap S between the side surface 311 of the inner holder 31 and the first frame portion 33.

The outer holder 32 has a cutout 34 formed by cutting out the rear (-Z direction) portion of the first frame 33 in the direction of the optical axis L. The flexible printed circuit board 7 bends in the +Y direction inside the first frame 33 and extends through the cutout 34 to the wiring housing 51.

(flexible printed circuit board)
FIG. 3 is a perspective view of the flexible printed circuit board 7, and FIG. 4 is a development view of the flexible printed circuit board 7 before assembly. FIG. 4( a) is a plan view of the flexible printed circuit board 7 as seen from the front side (+Z direction) in the optical axis L direction, FIG. 4( b) is a side view of the flexible printed circuit board 7, and FIG. 4( c) is a bottom view of the flexible printed circuit board 7 as seen from the rear side (-Z direction) in the optical axis L direction. In FIGS. 3 and 4, the outline shapes of the optical module substrate 20 connected to the end of the flexible printed circuit board 7 and the inner holder 31 to which the optical module substrate 20 is fixed are indicated by dashed lines. The movable body 3 includes the optical module substrate 20 on which the imaging element and signal processing circuit of the optical module 2 are mounted, and the flexible printed circuit board 7 is connected to the optical module substrate 20. The flexible printed circuit board 7 includes a power supply line to the optical module 2 and a signal line for extracting signals from the optical module 2 to the outside.

As shown in FIG. 4, the flexible printed circuit board 7 extends linearly before assembly. The flexible printed circuit board 7 includes a flexible substrate 70, a connector portion 8 provided at one end of the flexible substrate 70 in the longitudinal direction, and a reinforcing plate 80 fixed to the flexible substrate 70. The flexible substrate 70 includes a wide portion 71 located closer to the connector portion 8 than the center in the longitudinal direction, and a slit 72 extending perpendicular to the width direction at the center of the width direction of the area on the optical module substrate 20 side (movable body 3 side) of the wide portion 71. The slit 72 is a through portion that penetrates the flexible substrate 70. Therefore, the flexible substrate 70 is divided into two narrow flexible substrate portions in the area where the slit 72 is provided.

The reinforcing plate 80 comprises a first reinforcing plate 81 fixed to the wide portion 71, two second reinforcing plates 82 fixed to both sides of the slit 72 in the width direction, and two third reinforcing plates 83 fixed at a position closer to the optical module substrate 20 (movable body 3 side) than the slit 72. Like the second reinforcing plate 82, the third reinforcing plates 83 are arranged side by side in the width direction of the flexible substrate 70. As will be described later, the reinforcing plate 80 functions as a spacer to prevent contact between flexible substrates 70 or between the flexible substrate 70 and other components.

As shown in Figures 2 and 3, the shape of the flexible printed circuit board 7 after assembly is such that it is bent in the +Y direction of the movable body 3 to fit into the wiring housing 51, and then pulled out from the cutout 53 of the wiring housing 51 to the front side in the optical axis L direction (+Z direction). In this embodiment, the shape of the flexible printed circuit board 7 after assembly has two folded portions extending in directions that intersect with each other. One of the two folded portions is a first folded portion 73 that extends in a direction that intersects with the optical axis L (the Y-axis direction), and the other is a second folded portion 74 that extends in the optical axis L direction.

In this embodiment, the first folded portion 73 extends in a direction (Y-axis direction) along an imaginary plane (XY plane) that includes the X-axis (first axis) and Y-axis (second axis), which are the oscillation axes of the movable body 3, and extends in a direction perpendicular to the optical axis L. Furthermore, the first folded portion 73 extends radially away from the oscillation center P of the movable body 3 (+Y direction), then bends forward in the optical axis L direction (+Z direction), then folds back in the opposite direction, and extends radially toward the oscillation center P (-Y direction). The first folded portion 73 is located behind the oscillation center P of the movable body 3 in the optical axis L direction (-Z direction), and extends radially away from the oscillation center P of the movable body 3 (+Y direction), then bends toward the oscillation center P in the optical axis L direction (+Z direction), then folds back in the opposite direction.

The flexible printed circuit board 7 is bent at a substantially right angle immediately after being pulled out in the +Y direction from the movable body 3, extends along the movable body 3 in the direction of the optical axis L, and then folded back. In other words, the second folded back portion 74 is provided at a position immediately after the flexible printed circuit board 7 is pulled out from the movable body 3. The second folded back portion 74 is formed by folding back the portion of the flexible printed circuit board 7 on the optical module substrate 20 side (movable body 3 side) from the slit 72.

The flexible printed circuit board 7 also bends at a substantially right angle from the second folded portion 74, extending in the +Y direction, extending close to the frame portion 513 located at the end of the wiring housing portion 51 in the +Y direction, and then folding back to form the first folded portion 73. The first folded portion 73 is formed by folding back the portion where the slit 72 is provided.

The wide portion 71 of the flexible printed circuit board 7 is located on the -Y direction side of the first folded portion 73 and is fixed to the upper plate portion 514 of the wiring accommodating portion 51 via the first reinforcing plate 81. In other words, the wide portion 71 of the flexible printed circuit board 7 functions as the fixing portion that is fixed to the fixed body 5. The upper plate portion 514 of the wiring accommodating portion 51 functions as the fixing surface to which the flexible printed circuit board 7 is fixed. The first reinforcing plate 81 functions as a spacer (third spacer) to prevent contact between the flexible printed circuit board 7 and the upper plate portion 514. The flexible printed circuit board 7 is bent at a substantially right angle on the -Y direction side of the wide portion 71 (fixing portion) and pulled out from the cutout portion 53 of the wiring accommodating portion 51 toward the front (+Z) side in the direction of the optical axis L.

The first folded portion 73 includes a first extending portion 731 and a second extending portion 732 extending in the Y direction, and a first bent portion 733 that bends from the first extending portion 731 toward the front side of the optical axis L direction (+Z direction) and then bends in the opposite direction to connect with the second extending portion 732. The first extending portion 731 and the second extending portion 732 overlap when viewed from the optical axis L direction (i.e., the direction perpendicular to the XY plane). The second reinforcing plate 82 is positioned between the first extending portion 731 and the second extending portion 732, and therefore functions as a spacer (first spacer) to prevent contact between the first extending portion 731 and the second extending portion 732. The second reinforcing plate 82 is positioned closest to the first bent portion 733 (the position closest to the +Y direction) between the first extending portion 731 and the second extending portion 732.

The second folded portion 74 is made up of a third extending portion 741 and a fourth extending portion 74
2, and a second bent portion 743 that extends in a reverse bent shape from the third extending portion 741 and connects to the fourth extending portion 742. The third extending portion 741 and the fourth extending portion 742 overlap when viewed from the Y direction (i.e., the direction perpendicular to the optical axis L). The third reinforcing plate 83 is disposed between the third extending portion 741 and the fourth extending portion 742, and therefore functions as a spacer (second spacer) for preventing contact between the third extending portion 741 and the fourth extending portion 742. The third reinforcing plate 83 is disposed at a position closest to the second bent portion 743 (the position closest to the +Z direction) between the third extending portion 741 and the fourth extending portion 742.

Figure 5 is a partial cross-sectional view showing the holding structure of the second folded portion 74. The flexible printed circuit board 7 has a drawn-out portion 75 drawn out from the movable body 3 in the +Y direction. The second folded portion 74 has a portion that bends and extends from the drawn-out portion 75 in the optical axis L direction and is fixed to the movable body 3. In this embodiment, the third extending portion 741 of the second folded portion 74 bends and extends from the drawn-out portion 75 toward the front side in the optical axis L direction (+Z direction) and is fixed to the side surface 311 of the inner holder 31 in the +Y direction. The third extending portion 741 is fixed to the side surface 311 with double-sided tape 76. The double-sided tape 76 extends from the vicinity of the drawn-out portion 75 to the vicinity of the second bent portion 743, fixing most of the third extending portion 741 to the side surface 311.

The third extension portion 741 may be fixed by a method other than double-sided tape 76. For example, the third extension portion 741 may be fixed using an adhesive. Furthermore, it is sufficient that at least a portion of the third extension portion 741 is fixed to the side surface 311. For example, only the portion close to the drawer portion 75 may be fixed to the side surface 311, with the other portion being free to move.

The second folded portion 74 includes a first portion 77 that can easily deform when the movable body 3 swings around the X axis. In this embodiment, the third extension portion 741 is fixed to the side surface 311 of the movable body 3, so the fourth extension portion 742 functions as the first portion 77. The first portion 77 extends in the direction of the optical axis L.

The movable body 3 has a first opposing portion and a second opposing portion that face each other in a direction intersecting the optical axis L, and a second folded portion 74 is disposed between the first opposing portion and the second opposing portion. In this embodiment, the first opposing portion is provided on the inner holder 31 of the movable body 3, and the second opposing portion is provided on the outer holder 32 of the movable body 3. As described above, the outer holder 32 has a first frame portion 33 that faces the side surface 311 of the inner holder 31 in the +Y direction across a gap S. The first frame portion 33 has a protrusion 35 that protrudes toward the inner holder 31 (in the -Y direction), and the tip surface of the protrusion 35 faces the side surface 311 of the inner holder 31 in the Y-axis direction. In other words, the side surface 311 of the inner holder 31 is the first opposing portion, and the protrusion 35 of the first frame portion 33 is the second opposing portion.

The second folded portion 74 is positioned in the gap S between the side surface 311 of the inner holder 31 and the convex portion 35 of the first frame portion 33. By positioning the first frame portion 33 on the outer periphery of the second folded portion 74, the first frame portion 33 restricts deformation of the second folded portion 74 before it comes into contact with the outer frame portion 50 of the fixed body 5 when the movable body 3 swings. As shown in FIG. 5 , the convex portion 35 is positioned within a range that overlaps with the third reinforcing plate 83 when viewed in a direction perpendicular to the optical axis L (the Y-axis direction). Therefore, the only area where deformation of the second folded portion 74 is restricted by the convex portion 35 is the area where the third reinforcing plate 83 is provided.

6A and 6B are explanatory diagrams of the arrangement space of a flexible printed circuit board 7 to which the present invention is applied. Fig. 6A shows the shape of the flexible printed circuit board 7 when the movable body 3 swings to one side about the X axis, and Fig. 6B shows the shape of the flexible printed circuit board 7 when the movable body 3 rotates to the other side about the X axis. Fig. 7 is an explanatory diagram of the arrangement space of a flexible printed circuit board 7X of a comparative example. The flexible printed circuit board 7X of the comparative example has a shape in which multiple folded portions extending in the Y axis direction are stacked, and does not have any folded portions extending in the optical axis L direction.

As shown in FIG. 7, the flexible printed circuit board 7X of the comparative example warps significantly when the movable body 3 swings around the X-axis, so the height H0 of the arrangement space in the optical axis L direction must be large. In contrast, as shown in FIG. 6, the flexible printed circuit board 7 of this embodiment has a second folded portion 74 extending in the optical axis L direction that can easily deform when the movable body 3 swings around the X-axis, so the amount of warping of the first folded portion 73 is small. Therefore, the height H1 of the arrangement space in the optical axis L direction is smaller than the height H0 of the arrangement space of the comparative example. Therefore, the height of the arrangement space for the flexible printed circuit board 7 in the optical axis L direction can be made smaller in this embodiment than in the comparative example.

(Main effects of this embodiment)
As described above, the optical unit with shake correction function of this embodiment includes the movable body 3 equipped with the optical module 2, the swing support mechanism 4 that supports the movable body 3 swingably about a first axis (X-axis) intersecting the optical axis L and that supports the movable body 3 swingably about a second axis (Y-axis) intersecting the optical axis L and the first axis (X-axis), the fixed body 5 that supports the movable body 3 via the swing support mechanism 4, the swing magnetic drive mechanism 6 that swings the movable body 3 about the first axis (X-axis) and the second axis (Y-axis), and the flexible printed circuit board 7 connected to the movable body 3. The flexible printed circuit board 7 includes a wide portion 71 fixed to the fixed body 5, a first portion 77 provided between the wide portion 71 and a portion connected to the movable body 3, and a first folded portion 73 provided between the first portion 77 and the wide portion 71. The first portion 77 extends in the direction of the optical axis L, and the first folded portion 73 extends in a direction intersecting the optical axis L (Y-axis direction) and is folded back in the opposite direction.

In this embodiment, the flexible printed circuit board 7 connected to the movable body 3 includes a first portion 77 extending in the direction of the optical axis L and a first folded portion 73 extending in a direction intersecting the optical axis L (the Y-axis direction). The first portion 77 is easily deformable when the movable body 3 swings around the X-axis. Therefore, when the movable body 3 swings in either the direction around the first axis (X-axis) or the second axis (Y-axis), at least one of the first portion 77 and the first folded portion 73 can easily bend. Therefore, when the movable body 3 swings in either the direction around the X-axis or the Y-axis, an increase in the swing load of the movable body 3 due to the resistance of the flexible printed circuit board 7 can be suppressed. This can suppress an increase in power consumption.

In addition, this embodiment includes a first portion 77 that extends in a direction intersecting the first folded portion 73, so the amount of warping of the first folded portion 73 in the direction of the optical axis L when the movable body 3 swings is small. This allows for a smaller installation space for the flexible printed circuit board 7.

In this embodiment, the first folded portion 73 extends radially away from the oscillation center P of the movable body 3 (+Y direction), then folds back in the opposite direction and extends radially toward the oscillation center P of the movable body 3 (-Y direction). Therefore, the side closer to the movable body 3 is more flexible, which reduces the resistance of the flexible printed circuit board 7 when the movable body 3 oscillates. This helps prevent an increase in the oscillation load. Furthermore, the first folded portion 73 is bent in the direction toward the oscillation center P of the movable body 3 in the optical axis L direction and then folded back in the opposite direction. In this way, by bending and folding back in the direction toward the oscillation center P in the optical axis L direction, the first folded portion 73 can be brought closer to the oscillation center P in the optical axis L direction. This reduces the resistance of the flexible printed circuit board 7 when the movable body 3 oscillates around an axis that intersects with the optical axis L. This helps prevent an increase in the oscillation load.

In this embodiment, the first folded portion 73 includes a first extending portion 731 and a second extending portion 732 that overlap when viewed from the direction of the optical axis L, and a second reinforcing plate 82 that functions as a spacer (first spacer) is disposed between the first extending portion 731 and the second extending portion 732. Therefore, a gap can be secured between the first extending portion 731 and the second extending portion 732, thereby suppressing an increase in resistance and damage due to contact between the flexible substrates 70.

In this embodiment, the flexible printed circuit board 7 has a second folded portion 74 that extends in the optical axis L direction along the movable body 3 and is folded back once in the opposite direction. The second folded portion 74 includes a first portion 77 (fourth extending portion 742) that can easily deform when the movable body 3 swings around the X axis. In this way, by folding back the portion extending in the optical axis L direction once to provide the second folded portion 74, the resistance of the flexible printed circuit board 7 when the movable body 3 swings can be reduced. Therefore, an increase in the swing load can be suppressed.

In this embodiment, the second folded portion 74 has a third extension portion 741 and a fourth extension portion 742 that overlap when viewed in a direction perpendicular to the optical axis L (the Y-axis direction), and a third reinforcing plate 83 that functions as a spacer (second spacer) is disposed between the third extension portion 741 and the fourth extension portion 742. Therefore, a gap can be secured between the third extension portion 741 and the fourth extension portion 742, thereby suppressing increased resistance and damage due to contact between the flexible substrates 70.

In this embodiment, the flexible printed circuit board 7 has an extension portion 75 that is extended from the movable body 3 in the +Y direction, and the second folded portion 74 has at least a portion of a third extension portion 741 that bends and extends from the extension portion 75 in the optical axis L direction and is fixed to the movable body 3. By fixing the third extension portion 741 to the movable body 3, the second folded portion 74 can be maintained in a position extending in the optical axis L direction. Therefore, an increase in the resistance of the flexible printed circuit board 7 when the movable body 3 swings around the X axis can be suppressed.

In this embodiment, the wide portion 71 of the flexible printed circuit board 7 is fixed to the upper plate portion 514 of the wiring accommodating portion 51 via a first reinforcing plate 81. Therefore, the first reinforcing plate 81 functions as a spacer (third spacer), ensuring a gap between the upper plate portion 514 and the flexible printed circuit board 7, thereby suppressing an increase in resistance due to contact between the fixed body 5 and the flexible printed circuit board 7.

In this embodiment, the flexible printed circuit board 7 has a slit 72 extending in a direction intersecting the width direction, and the first folded portion 73 is formed by folding back the portion of the flexible substrate 70 where the slit 72 is provided. By providing the slit 72 in the flexible printed circuit board 7, the resistance when the flexible printed circuit board 7 bends can be reduced, thereby suppressing an increase in the oscillation load of the movable body 3.

In this embodiment, the movable body 3 has a first opposing portion and a second opposing portion spaced apart in a direction intersecting the optical axis L (the Y-axis direction), and the second folded portion 74 is disposed between the first opposing portion and the second opposing portion. Specifically, the side surface 311 of the inner holder 31 is the first opposing portion, and the convex portion 35 provided on the first frame portion 33 of the outer holder 32 is the second opposing portion. Therefore, the movement range of the second folded portion 74 can be restricted, thereby suppressing excessive deformation of the flexible printed circuit board 7. Furthermore, since the convex portion 35 is disposed within a range overlapping with the third reinforcing plate 83 of the second folded portion 74 as viewed from the Y-axis direction, its movement is restricted only within the range where the third reinforcing plate 83 is provided. Therefore, the fourth extension portion 742 can move freely within the range where the third reinforcing plate 83 is not provided, thereby suppressing excessive deformation of the flexible printed circuit board 7 and reducing resistance of the flexible printed circuit board 7 when the movable body 3 swings. Furthermore, because the area where the protrusions 35 are provided is small, the outer holder 32 can be made smaller and lighter, and the movable body 3 can be made smaller and lighter.

In the above embodiment, the wide portion 71 of the flexible printed circuit board 7 is fixed directly to the fixed body 5, but the component to which the flexible printed circuit board 7 is fixed may not be the fixed body 5, but a support component to which the fixed body 5 is fixed. For example, the flexible printed circuit board 7 may be fixed to a case that houses the fixed body 5.

(First Modification)
8 is an explanatory diagram of a flexible printed circuit board 7A of a first modified example. While the above-described embodiment includes a second folded portion 74 extending in the direction of the optical axis L, the first modified example includes a first portion 77 extending in the direction of the optical axis L along the side surface of the movable body 3. In addition, a portion that is bent and extends in the +Y direction from the first portion 77 is bent in the direction of the optical axis L and folded back in the opposite direction, and then extends in a direction radially approaching the oscillation center P, thereby forming a first folded portion 73.

The first portion 77 bends from the draw-out portion 75 in the direction of the optical axis L and extends along the side surface 311. Furthermore, only the portion of the first portion 77 near the draw-out portion 75 is fixed to the side surface 311; the other portion is not fixed to the side surface 311. Therefore, the first portion 77 can easily deform when the movable body 3 swings around the X axis, thereby reducing the resistance of the flexible printed circuit board 7 when the movable body 3 swings.

(Second Modification)
9 is an explanatory diagram of a flexible printed circuit board 7B of a second modified example. In the above embodiment, only one folded portion of the flexible substrate 70 extending in the Y-axis direction is provided, but the second modified example includes multiple first folded portions 73 extending in the Y-axis direction. As shown in FIG. 9, in the second modified example, the flexible substrate 70 extending in the Y-axis direction is folded back twice in opposite directions, and the first folded portions 73 are stacked in two layers. In this way, by folding back the folded portion extending in the Y-axis direction two or more times, the resistance of the flexible printed circuit board 7 when the movable body 3 swings around the Y-axis can be further reduced.

(Third Modification)
10 is an explanatory diagram of a flexible printed circuit board 7C of a third modified example. In the above embodiment, the flexible substrate 70 extending in the optical axis L direction has only one folded portion, but the third modified example has multiple second folded portions 74 extending in the optical axis L direction. As shown in FIG. 10, in the third modified example, the flexible substrate 70 extending in the optical axis L direction is folded back twice in opposite directions, and the second folded portions 74 are stacked in two layers. In this way, by folding back the folded portion extending in the optical axis L direction two or more times, the resistance of the flexible printed circuit board 7 when the movable body 3 swings around the X axis can be further reduced.

(Fourth Modification)
FIG. 11 is a perspective view of a flexible printed circuit board 7D and a movable body 3D of a fourth modified example. FIG. 12 is an exploded perspective view of the flexible printed circuit board 7D and a movable body 3D of the fourth modified example. FIG. 13 is a bottom view of the flexible printed circuit board 7D and a movable body 3D of the fourth modified example. As shown in FIG. 11 , the flexible printed circuit board 7D of the fourth modified example is extended in the +Y direction of the movable body 3D. The end where the connector portion 8 is provided is extended to the rear side (−Z direction) in the optical axis L direction. The flexible printed circuit board 7D has a first folded portion 73 extending in a direction intersecting the optical axis L (Y-axis direction) and a second folded portion 74 extending in the optical axis L direction. The first folded portion 73 extends in the +Y direction, then bent to the rear side (−Z direction) in the optical axis L direction and folded back in the opposite direction. A first reinforcing plate 82 for preventing or suppressing contact between the first extending portion 731 and the second extending portion 732 is fixed to the first folded portion 73. In addition, the flexible printed circuit board 7D is fixed to a fixed body (not shown) via the first reinforcing plate 81.

The movable body 3D of the fourth modified example includes a camera module 2A (optical module) and an outer holder 32D (holder) that surrounds the outer periphery of the camera module 2A. The camera module 2A modularizes the inner holder 31 of the above embodiment, the optical module 2 held by the inner holder 31, and an optical module substrate (not shown) fixed to the -Z end of the inner holder 31, with the inner holder 31 forming the housing for the camera module 2A. The movable body 3D differs from the above embodiment in the shape of the outer holder 32D that surrounds the outer periphery of the camera module 2A. The outer holder 32D includes a first frame portion 33D that extends in the X-axis direction along the +Y side surface of the camera module 2A, and a recess 36 recessed in the -Y direction is formed on the +Y side surface of the first frame portion 33D. The second folded portion 74 of the flexible printed circuit board 7D is positioned in the recess 36.

As shown in FIG. 12, the second folded portion 74 includes a third extending portion 741 and a fourth extending portion 742 extending in the direction of the optical axis L, and a second bent portion 743 that extends in the opposite direction from the third extending portion 741 and connects to the fourth extending portion 742. The third extending portion 741 bends forward in the direction of the optical axis L (+Z direction) from the drawn-out portion 75, which is drawn out in the +Y direction from the movable body 3D, and extends in the direction of the optical axis L. The end of the fourth extending portion 742 on the rear side in the direction of the optical axis L (-Z direction) connects to the first extending portion 731 of the first folded portion 73.

(shape-retaining parts)
The flexible printed circuit board 7D includes a bent portion 78 bent at a substantially right angle at the connection position between the second folded portion 74 extending in the optical axis L direction and the first folded portion 73 extending in the Y-axis direction. As shown in FIG. 12 , the bent portion 78 includes a first portion 77 extending in the optical axis L direction and a second portion 79 bent from the first portion 77 in the +Y direction (a direction perpendicular to the optical axis L). The first portion 77 is a fourth extending portion 742 of the second folded portion 74, and the second portion 79 is an end portion of the first extending portion 731 of the first folded portion 73 in the -Y direction. A bent plate 90, which is a shape-retaining component that retains the flexible circuit board 70 in a shape bent at a substantially right angle, is fixed to the bent portion 78.

The bent plate 90 (shape-retaining component) comprises a first plate portion 91 fixed to the first portion 77 and a second plate portion 92 fixed to the second portion 79. The bent plate 90 is made of metal and is fixed to the first portion 77 and the second portion 79 with adhesive. Note that the material of the bent plate 90 is not limited to metal and may be resin or another material. The bent plate 90 is positioned inside the bent portion 78, with the first plate portion 91 fixed to the +Y direction surface of the first portion 77 (i.e., the surface facing the second portion 79), and the second plate portion 92 fixed to the +Z direction surface of the second portion 79 (i.e., the surface facing the first plate portion 91).

(Positioning structure of second folded portion)
In a flexible printed circuit board 7D of the fourth modification, a third reinforcing plate 83D is fixed to a third extending portion 741, and a fourth reinforcing plate 84D is fixed to a fourth extending portion 742. The third reinforcing plate 83D and the fourth reinforcing plate 84D abut in the Y-axis direction because the flexible substrate 70 constituting the third extending portion 741 and the fourth extending portion 742 is folded back to form a second folded portion 74, and are disposed between the third extending portion 741 and the fourth extending portion 742 to function as a second spacer. That is, in the fourth modification, the second spacer disposed between the third extending portion 741 and the fourth extending portion 742 is not a single member, but is configured by two members, the third reinforcing plate 83D and the fourth reinforcing plate 84D.

The third reinforcing plate 83D and the fourth reinforcing plate 84D have the same shape. The lengths of the third reinforcing plate 83D and the fourth reinforcing plate 84D in the X-axis direction are greater than the widths of the third extending portion 741 and the fourth extending portion 742. Therefore, the third reinforcing plate 83D and the fourth reinforcing plate 84D each have an end 85 that protrudes in the +X direction from between the third extending portion 741 and the fourth extending portion 742, and an end 86 that protrudes in the −X direction from between the third extending portion 741 and the fourth extending portion 742.

As shown in FIG. 12, the recess 36 of the first frame 33D has a bottom surface 360 located in the -Y direction of the second folded portion 74, and a pair of side surfaces 361, 362 extending in the +Y direction from both ends of the bottom surface 360 in the X-axis direction. The pair of side surfaces 361, 362 face each other in the X-axis direction. Each of the side surfaces 361, 362 has a groove 37 formed therein, extending in the X-axis direction (direction of the optical axis L). As shown in FIG. 13, the +X-direction end portions 85 of the third reinforcing plate 83D and the fourth reinforcing plate 84D are inserted into the groove 37 of the side surface 361, and the -X-direction end portions 86 of the third reinforcing plate 83D and the fourth reinforcing plate 84D are inserted into the groove 37 of the side surface 362, thereby holding the second folded portion 74 in the first frame 33D.

Figure 14 is a cross-sectional view of the third reinforcing plate 83D, the fourth reinforcing plate 84D, and the groove portion 37, taken along the line B-B in Figure 13. The line B-B is the position of the +X-direction end 85 of the third reinforcing plate 83D and the fourth reinforcing plate 84D, but the cross-sectional configuration when cut along the -X-direction end 86 is the same as that shown in Figure 14. The lead-out portion 75 of the flexible printed circuit board 7D is led out into the recess 36 through a notch 34D, which is formed by cutting out the -Z-direction end of the bottom surface 360 of the recess 36 (see Figure 12). The edge of the notch 34D is chamfered to form a curved surface. This prevents the flexible printed circuit board 7D from coming into contact with the edge of the notch 34D and being damaged.

As shown in FIG. 12, recess 36 has a step surface 381 that bends in the +X direction from the -Z-direction end of side surface 361 facing the +X direction, and a step surface 382 that bends in the -X direction from the -Z-direction end of side surface 362 facing the -X direction. Groove 37 has a guide portion 371 that extends in the +Z direction from step surfaces 381 and 382, and a reinforcing plate holding portion 372 that extends in the +Z direction from guide portion 371. As shown in FIGS. 12 and 14, reinforcing plate holding portion 372 is a groove with a constant width in the Y-axis direction, and guide portion 371 is a tapered groove whose groove width increases toward the opposite side from reinforcing plate holding portion 372 (i.e., the -Z direction). A flat stopper surface 373 facing the -Z direction is formed at the +Z-direction end of reinforcing plate holding portion 372.

The ends 85, 86 of the third reinforcing plate 83D and the fourth reinforcing plate 84D are lightly press-fit into the reinforcing plate holder 372. This positions the third reinforcing plate 83D and the fourth reinforcing plate 84D in the Y-axis direction. The third reinforcing plate 83D and the fourth reinforcing plate 84D are also positioned in the Z-axis direction by abutting the +Z-direction edges of the ends 85, 86 against the stopper surfaces 373 of the reinforcing plate holder 372. By positioning the third reinforcing plate 83D and the fourth reinforcing plate 84D in the optical axis L direction, the bent portion 78 connecting the second folded portion 74 and the first folded portion 73 is positioned in the optical axis L direction. Therefore, the first folded portion 73 is positioned in the optical axis L direction.

Figure 15 is an explanatory diagram of the process of bending and positioning the second folded portion 74. Figure 15(a) shows the process of inserting the ends 85, 86 of the third reinforcing plate 83D and the fourth reinforcing plate 84D into the guide portion 371 while bending the second folded portion 74. Figures 5(b) and (c) show the process of lightly press-fitting the ends 85, 86 of the third reinforcing plate 83D and the fourth reinforcing plate 84D into the reinforcing plate holding portion 372. Figure 5(d) shows the process of abutting the ends 85, 86 of the third reinforcing plate 83D and the fourth reinforcing plate 84D against the stopper surface 373 to position them in the Z-axis direction, and the process of filling the groove portion 37 with adhesive. Like Figure 14, Figure 15 shows the cross-sectional configuration of the third reinforcing plate 83D and the fourth reinforcing plate 84D when cut at the end 85 in the +X direction, but the cross-sectional configuration is the same when cut at the end 86 in the -X direction.

In the flexible printed circuit board 7D before the second folded portion 74 is folded, the third reinforcing plate 83D is fixed to the part of the flexible substrate 70 that constitutes the third extending portion 741, and the fourth extending portion 742 is fixed to the part of the flexible printed circuit board 70 that constitutes the third extending portion 741.
15A, the flexible substrate 70 to which the third reinforcing plate 83D and the fourth reinforcing plate 84D are fixed is bent, and while the camera module 2A is inserted into the inside of the outer holder 32D, the bent flexible substrate 70 is inserted from the -Z direction into the recess 36 formed in the first frame portion 33D of the outer holder 32D. At this time, the ends 85 and 86 of the third reinforcing plate 83D and the fourth reinforcing plate 84D, which protrude to both sides in the X-axis direction from between the third extension portion 741 and the fourth extension portion 742, are inserted into the groove portion 37 from the side of the step surfaces 381 and 382 of the recess 36, respectively.

In the process shown in Figure 15(a), a jig (not shown) is used to press the edge of the third reinforcing plate 83D in the -Z direction, thereby forcing the ends 85, 86 of the third reinforcing plate 83D in the +Z direction along the inner surface of the guide portion 371 in the -Y direction. When the ends 85, 86 of the third reinforcing plate 83D are inserted into the guide portion 371, the ends 85, 86 of the fourth reinforcing plate 84D, which is connected to the third reinforcing plate 83D via the flexible substrate 70, are also inserted into the guide portion 371. When the third reinforcing plate 83D is further pressed in the +Z direction, the ends 85, 86 of the third reinforcing plate 83D and the fourth reinforcing plate 84D are inserted from the guide portion 371 into the reinforcing plate holding portion 372.

In the process shown in Figure 15(b), the third reinforcing plate 83D and the fourth reinforcing plate 84D are lightly press-fit into the reinforcing plate holding portion 372 while abutting in the Y-axis direction. This positions the third reinforcing plate 83D and the fourth reinforcing plate 84D in the Y-axis direction. Furthermore, by using a jig (not shown) to push the third reinforcing plate 83D and the fourth reinforcing plate 84D deeper into the reinforcing plate holding portion 372, one of the third reinforcing plate 83D and the fourth reinforcing plate 84D hits a stopper surface 373 formed at the back of the reinforcing plate holding portion 372, as shown in Figure 15(c).

As shown in Figure 15(d), the third reinforcing plate 83D and the fourth reinforcing plate 84D are pressed in until they both abut against the stopper surface 373, thereby positioning the third reinforcing plate 83D and the fourth reinforcing plate 84D in the direction of the optical axis L. Next, with the third reinforcing plate 83D and the fourth reinforcing plate 84D abutting against the stopper surface 373, adhesive 39 is poured from the guide portion 371 into the groove portion 37 and allowed to harden. This fixes the third reinforcing plate 83D and the fourth reinforcing plate 84D to the groove portion 37.

As described above, in the fourth modified example, the second spacer disposed between the third extension portion 741 and the fourth extension portion 742 includes a third reinforcing plate 83D fixed to the third extension portion 741 and a fourth reinforcing plate 84D fixed to the fourth extension portion 742. The movable body 3D includes an outer holder 32D that surrounds the outer periphery of the camera module 2A (optical module), and the outer holder 32D includes a groove portion 37 in which the ends 85, 86 of the third reinforcing plate 83D and the fourth reinforcing plate 84D that protrude from between the third extension portion 741 and the fourth extension portion 742 are disposed. The groove portion 37 includes a stopper surface 373 (positioning portion) that positions the third reinforcing plate 83D and the fourth reinforcing plate 84D in the optical axis L direction.

In the fourth modified example, the third reinforcing plate 83D and the fourth reinforcing plate 84D can be positioned in the optical axis L direction and the Y-axis direction intersecting the optical axis L. Furthermore, because the third reinforcing plate 83D and the fourth reinforcing plate 84D can be positioned in the optical axis L direction, variation in the bending position of the second folded portion 74 can be suppressed. As a result, variation in the position in the optical axis L direction of the bent portion 78, which is bent in the +Y direction from the -Z-direction end of the fourth extending portion 741 that extends in the -Z direction with the bending position as its apex, can be suppressed. Therefore, variation in the position in the optical axis L direction of the flexible printed circuit board 7D that is routed in the +Y direction of the second folded portion 74 can be suppressed.

In the fourth modification, the groove 37 formed on the side surfaces 361, 362 of the recess 36 includes a reinforcing plate holding portion 372 into which the ends 85, 86 of the third reinforcing plate 83D and the ends 85, 86 of the fourth reinforcing plate 84D are fitted, and a guide portion 37 whose groove width increases toward the opposite side from the reinforcing plate holding portion 372.
1. Therefore, the third reinforcing plate 83D and the fourth reinforcing plate 84D can be inserted into the guide portion 371 while folding the second folded portion 74. Furthermore, by pushing the third reinforcing plate 83D and the fourth reinforcing plate 84D from the guide portion 371 into the reinforcing plate holding portion 372, the second folded portion 74 can be completely folded and positioned in the Y-axis direction. Therefore, the second folded portion 74 can be easily folded and positioned.

In the fourth modification, the ends 85, 86 of the third reinforcing plate 83D and the ends 85, 86 of the fourth reinforcing plate 84D are press-fit into the reinforcing plate holding portion 372. This improves the positional accuracy of the third reinforcing plate 83D and the fourth reinforcing plate 84D in the Y-axis direction. Furthermore, the third reinforcing plate 83D and the fourth reinforcing plate 84D can be temporarily fixed in the groove portion 37 before being fixed with adhesive 39.

The flexible printed circuit board 7D of the fourth modified example has a bent portion 78 including a first portion 77 and a second portion 79 bent from the first portion 77 in a direction intersecting the optical axis L (the +Y direction), and a shape-retaining component that maintains the shape of the bent portion 78 is fixed to the bent portion 78. The shape-retaining component is a bent plate 90, which includes a first plate portion 91 fixed to the first portion 77 extending in the optical axis L direction and a second plate portion 92 fixed to the second portion 79 extending in the +Y direction. Fixing the bent plate 90 (shape-retaining component) to the bent portion 78 in this way prevents the bent portion 78 from opening over time, thereby suppressing changes in the initial posture of the movable body 3D due to changes in the shape of the flexible printed circuit board 7D over time. This suppresses adverse effects on the characteristics of the optical unit with shake correction function. Furthermore, when the flexible printed circuit board 7D is bent by fixing it to a bending plate 90 (shape-retaining component), there is no need to plastically deform the flexible circuit board 70 to maintain the bent shape, which reduces damage to the bent position. This reduces fatigue breakage of the wiring on the flexible printed circuit board 7D due to the bending process.

In the fourth variant, a bent plate 90 is used as the shape-retaining component, which allows the shape-retaining component to be made thinner and requires less space. This prevents the shape-retaining component from interfering with the fixed body (not shown) or the movable body 3D. The bent plate 90 is also located inside the bent portion 78 and is fixed to the +Y direction surface of the first part 77. Therefore, because the bent plate 90 is located on the opposite side of the flexible printed circuit board 7D from the movable body 3D, interference between the bent plate 90 and the movable body 3D can be prevented or reduced.

(Modification of Shape Retaining Part)
The shape-retaining component is not limited to the form shown in FIG. 12 . FIG. 16 is an explanatory diagram of a first modified example of the shape-retaining component, and FIG. 17 is an explanatory diagram of a second modified example of the shape-retaining component. As shown in FIG. 16 , the shape-retaining component of the first modified example is a bent plate 90A including a first plate portion 91A and a second plate portion 92A bent at a substantially right angle from the first plate portion 91A. The bent plate 90A includes a plurality of openings 93. The openings 93 are slit-shaped and are arranged at regular intervals in the X-axis direction. Each opening 93 penetrates the first plate portion 91A and the second plate portion 92A. Providing the openings 93 allows the bent plate 90A to be lightweight.

Each of the flexible printed circuit boards 7, 7A, 7B, 7C, and 7D of the above embodiments includes a first portion 77 extending in the optical axis L direction and a second portion 79 bent at a substantially right angle from the first portion 77, thereby including a bent portion 78. Therefore, in each of the above embodiments, a bent plate 90 and its modifications (first and second modifications) can be attached to the bent portion 78. FIG. 16 shows a state in which a bent plate 90A of the first modification is attached to the bent portion 78 of the flexible printed circuit board 7 of the embodiment shown in FIG. 3. The flexible printed circuit board 7 is drawn out in the +Y direction from the optical module substrate 20 fixed to the bottom of the inner holder (not shown). The bent plate 90A of the first modification has an opening 93, so that the bent portion 78
When fixing the substrate 90 with adhesive, the opening 93 can be used as an adhesive reservoir.

The bent plate 90A of the first modified example has a first notch 94 formed by cutting out a corner of the first plate portion 91A in an arc shape, and a second notch 95 formed by cutting out a corner of the second plate portion 92A in an arc shape. The first notch 94 is formed at both ends of the edge of the first plate portion 91A opposite the second plate portion 92A (i.e., the edge in the +Z direction). The second notch 95 is formed at both ends of the edge of the second plate portion 92A opposite the first plate portion 91A (i.e., the edge in the +Y direction). In this way, by cutting out both ends of the bent plate 90A in the X-axis direction, it is possible to suppress an increase in the spring constant of the flexible printed circuit board 7 caused by attaching the bent plate 90A.

The effect of suppressing an increase in the spring constant of the flexible printed circuit board 7 is mainly achieved by forming the second notch 95 in the second plate portion 92A, and the first notch 94 formed in the first plate portion 91A has little effect in suppressing an increase in the spring constant of the flexible printed circuit board 7. Therefore, the first notch 94 may be omitted. In the bent plate 90A of the first modified example, the first notch 94 and the second notch 95 have the same shape. Therefore, the bent plate 90A has a symmetrical shape with respect to the bending position where the first plate portion 91A and the second plate portion 92A are connected. Therefore, there is no need to consider the orientation of the components when installing the bent plate 90A, which reduces the effort required for installation.

As shown in FIG. 17 , the shape-retaining component of the second modified example is a bent plate 90B including a first plate portion 91B and a second plate portion 92B bent at approximately a right angle from the first plate portion 91B. The bent plate 90B includes a first notch 96 formed by cutting out the +Z-direction edge of the first plate portion 91B, and a second notch 97 formed by cutting out the +Y-direction edge of the second plate portion 92A. The first plate portion 91B has a protrusion 98 formed in the center in the X-axis direction that protrudes in the +Z direction, and first notches 94 formed on both sides of the protrusion 98. Similarly, the second plate portion 92B has a protrusion 99 formed in the center in the X-axis direction that protrudes in the +Y direction, and second notches 95 formed on both sides of the protrusion 99. The first notch 96 and the second notch 97 have the same shape, and the bent plate 90B has a symmetrical shape with respect to the bending position where the first plate portion 91B and the second plate portion 92B are connected.

The bent plate 90B of the second modified example has a larger area cut out by the first notch 96 and the second notch 97 than the bent plate 90A of the first modified example, and is therefore more effective at suppressing an increase in the spring constant of the flexible printed circuit board 7 than the bent plate 90A of the first modified example. The center of the first plate portion 91B in the X-axis direction and the center of the second plate portion 92B in the X-axis direction are not cut out and protrusions 98 and 99 are formed, but even if the centers of the first plate portion 91B and the second plate portion 92B in the X-axis direction are cut out, this does not have much effect in suppressing an increase in the spring constant of the flexible printed circuit board 7. The bent plate 90B of the second modified example can effectively suppress an increase in the spring constant of the flexible printed circuit board 7 by cutting out both ends of the first plate portion 91B and the second plate portion 92B in the X-axis direction.

REFERENCE SIGNS LIST 1...optical unit with shake correction function, 2...optical module, 2A...camera module, 3, 3D...movable body, 4...swing support mechanism, 5...fixed body, 6...swing magnetic drive mechanism, 6X...first magnetic drive mechanism, 6Y...second magnetic drive mechanism, 7, 7A, 7B, 7C, 7D, 7X...flexible printed circuit board, 8...connector portion, 20...optical module substrate, 30...holder, 31...inner holder, 32, 32D...outer holder, 33, 33D...first frame portion, 34, 34D...cutout portion, 35...protrusion portion, 36...recess portion, 37...groove portion, 39...adhesive, 41...first swing support portion, 42...second swing support portion, 50...outer frame portion, 51...wiring accommodating portion, 52...opening portion, 53...cutout portion, 70...flexible substrate, 71...wide portion, 72...slit, 73...first folded portion, 74...second folded portion, 75...drawing portion, 76...double-sided tape, 77...first portion, 78
...bent portion, 79...second portion, 80...reinforcing plate, 81...first reinforcing plate, 82...second reinforcing plate, 83, 83D...third reinforcing plate, 84D...fourth reinforcing plate, 85...end in +X direction, 86...end in -X direction, 90, 90A, 90B...bent plates, 91, 91A, 91B...first plate portion, 92, 92A, 92B...second plate portion, 93...opening, 94, 96...first notch portion, 95, 97...second notch portion, 98, 99...protruding portion, 311...side surface, 360...bottom surface, 361...side surface in +X direction , 362...side surface in the -X direction, 371...guiding portion, 372...reinforcing plate holding portion, 373...stopper surface (positioning portion), 381, 382...step surface, 501, 502, 503, 504...side wall portion, 511, 512, 513...frame portion, 514...upper plate portion, 731...first extension portion, 732...second extension portion, 733...first bent portion, 741...third extension portion, 742...fourth extension portion, 743...second bent portion, L...optical axis, P...swing center, R1...first axis line, R2...second axis line, S...gap

Claims (20)

a movable body having an optical module;
a swing support mechanism that supports the movable body swingably about a first axis that intersects with an optical axis and that supports the movable body swingably about a second axis that intersects with the optical axis and the first axis;
a fixed body that supports the movable body via the swing support mechanism;
a magnetic driving mechanism for swinging the movable body around the first axis and the second axis;
a flexible printed circuit board connected to the movable body,
The flexible printed circuit board is
a fixed portion fixed directly or indirectly to the fixed body;
a first portion provided between a portion connected to the movable body and the fixed portion and extending in the optical axis direction along the movable body;
a first folded portion provided between the first portion and the fixed portion, extending in a direction intersecting the optical axis and folded back in the opposite direction;
a second folded portion extending in the optical axis direction and folded back once in the opposite direction,
the second folded portion includes the first portion;
the second folded portion includes a third extending portion and a fourth extending portion that overlap when viewed in a direction perpendicular to the optical axis,
a second spacer is disposed between the third extension portion and the fourth extension portion;
the movable body includes a first opposing portion and a second opposing portion spaced apart in a direction intersecting the optical axis,
the first portion is disposed between the first opposing portion and the second opposing portion,
the second opposing portion is disposed on the outer circumferential side of the first opposing portion,
The optical unit with shake correction function is characterized in that the second opposing portion is disposed within a range overlapping with the second spacer when viewed from a direction perpendicular to the optical axis . a movable body having an optical module;
a swing support mechanism that supports the movable body about a first axis that intersects with an optical axis and supports the movable body swingably about a second axis that intersects with the optical axis and the first axis;
a fixed body that supports the movable body via the swing support mechanism;
a magnetic driving mechanism for swinging the movable body around the first axis and the second axis;
a flexible printed circuit board connected to the movable body,
The flexible printed circuit board is
a fixed portion fixed directly or indirectly to the fixed body;
a first portion provided between a portion connected to the movable body and the fixed portion and extending in the optical axis direction along the movable body;
a first folded portion provided between the first portion and the fixed portion, extending in a direction intersecting the optical axis and folded back in the opposite direction;
a second folded portion extending in the optical axis direction and folded back once in the opposite direction,
the second folded portion includes the first portion;
the second folded portion includes a third extending portion and a fourth extending portion that overlap when viewed in a direction perpendicular to the optical axis,
a second spacer is disposed between the third extension portion and the fourth extension portion;
the second spacer includes a third reinforcing plate fixed to the third extension portion and a fourth reinforcing plate fixed to the fourth extension portion,
the movable body includes a holder that surrounds the outer periphery of the optical module,
the holder includes a groove portion in which an end portion of the third reinforcing plate protruding from between the third extension portion and the fourth extension portion and an end portion of the fourth reinforcing plate are disposed,
The optical unit with shake correction function is characterized in that the groove portion includes a positioning portion that positions the third reinforcing plate and the fourth reinforcing plate in the optical axis direction . The optical unit with shake correction function described in claim 2, characterized in that the groove portion comprises a reinforcing plate holding portion into which the end of the third reinforcing plate and the end of the fourth reinforcing plate fit, and a guide portion whose groove width widens as it approaches the opposite side from the reinforcing plate holding portion . 4. The optical unit with shake correction function according to claim 3 , wherein an end portion of the third reinforcing plate and an end portion of the fourth reinforcing plate are press-fitted into the reinforcing plate holding portion. The first folded portion
An optical unit with shake correction function as described in any one of claims 1 to 4, characterized in that it extends in a direction away from the swing center of the movable body in a radial direction, then turns back in the opposite direction and extends in a direction approaching the swing center in a radial direction. 6. The optical unit with shake correction function according to claim 1, wherein the first folded portion is bent in a direction approaching a swing center in the optical axis direction and then folded back in the opposite direction. the first folded portion includes a first extending portion and a second extending portion that overlap when viewed from the optical axis direction,
7. The optical unit with shake correction function according to claim 1, wherein a first spacer is disposed between the first extension portion and the second extension portion. The flexible printed circuit board is
8. The optical unit with shake correction function according to claim 1, wherein the first folded portion is provided in plural. The flexible printed circuit board is
9. The optical unit with shake correction function according to claim 1, wherein the second folded portion is provided in plural. the flexible printed circuit board includes an extraction portion that is extracted from the movable body in a direction intersecting the optical axis,
The optical unit with shake correction function described in any one of claims 1 to 9, characterized in that at least a part of the second folded portion that bends and extends from the pull-out portion in the optical axis direction is fixed to the movable body. 11. The optical unit with shake correction function according to claim 1, wherein the fixed portion is fixed to the fixed body via a third spacer. 12. The optical unit with shake correction function according to claim 1 , wherein the flexible printed circuit board has a slit extending in a direction intersecting with the width direction. the flexible printed circuit board has a bent portion including the first portion and a second portion bent from the first portion in a direction intersecting the optical axis,
13. The optical unit with shake correction function according to claim 1, wherein a shape-retaining component that retains the shape of the bent portion is fixed to the bent portion. The shape-retaining part is
The optical unit with shake correction function described in claim 13 is characterized in that it is a curved plate having a first plate portion fixed to the first part and a second plate portion extending in a direction intersecting the first plate portion and fixed to the second part. The optical unit with shake correction function described in claim 14, characterized in that the bent plate has a first notch portion formed at both ends of the edge of the first plate portion opposite the second plate portion, and a second notch portion formed at both ends of the edge of the second plate portion opposite the first plate portion. 16. The optical unit with shake correction function according to claim 14 , wherein the bending plate has an opening. 17. The optical unit with shake correction function according to claim 14 , wherein the bent plate is disposed inside the bent portion. a movable body having an optical module;
a swing support mechanism that supports the movable body about a first axis that intersects with an optical axis and supports the movable body swingably about a second axis that intersects with the optical axis and the first axis;
a fixed body that supports the movable body via the swing support mechanism;
a magnetic driving mechanism for swinging the movable body around the first axis and the second axis;
a flexible printed circuit board connected to the movable body,
The flexible printed circuit board is
a fixed portion fixed directly or indirectly to the fixed body;
a first portion provided between a portion connected to the movable body and the fixed portion and extending in the optical axis direction along the movable body;
a first folded portion provided between the first portion and the fixed portion, extending in a direction intersecting the optical axis and folded back in the opposite direction;
a second folded portion extending in the optical axis direction and folded back once in the opposite direction,
the second folded portion includes the first portion;
The second folded portion includes a third extending portion and a second extending portion which overlap each other when viewed from a direction perpendicular to the optical axis.
4. The extension portion
a manufacturing method of an optical unit with a shake correction function, in which a second spacer is disposed between the third extension portion and the fourth extension portion ,
a third reinforcing plate is fixed to a portion of the flexible printed circuit board that constitutes the third extending portion before the second folded portion is folded back, and a fourth reinforcing plate is fixed to a portion of the flexible printed circuit board that constitutes the fourth extending portion;
abutting the third reinforcing plate and the fourth reinforcing plate in a direction intersecting the optical axis to align the positions of the third reinforcing plate and the fourth reinforcing plate in the optical axis direction, thereby folding the second folded portion at a preset bending position. the movable body includes a holder that surrounds the outer periphery of the optical module,
The method for manufacturing an optical unit with shake correction function described in claim 18, characterized in that the ends of the third reinforcing plate and the fourth reinforcing plate are inserted into grooves formed in the holder, and the ends of the third reinforcing plate and the fourth reinforcing plate are abutted against positioning portions provided in the grooves, thereby aligning the positions of the third reinforcing plate and the fourth reinforcing plate in the optical axis direction. 20. The method for manufacturing an optical unit with shake correction function described in claim 19, characterized in that an end of the third reinforcing plate and an end of the fourth reinforcing plate are inserted into the groove portion to align the position in the optical axis direction, and then an adhesive is poured into the groove portion.