WO2022181640A1

WO2022181640A1 - Reflector drive device

Info

Publication number: WO2022181640A1
Application number: PCT/JP2022/007394
Authority: WO
Inventors: 寛志長田
Original assignee: アルプスアルパイン株式会社
Priority date: 2021-02-24
Filing date: 2022-02-22
Publication date: 2022-09-01
Also published as: JP2024049406A; CN116964916A

Abstract

A reflector drive device (101) that comprises a reflector holding member (4) that can hold a reflector (1) that bends light, a first support member (5) that supports the reflector holding member (4) such that the reflector holding member (4) can swing around a swing axis (SA1), a second support member (6) that supports the first support member (5) such that the first support member (5) can swing around a swing axis (SA2) that has an axial direction that is orthogonal to the axial direction of swing axis (SA1), a first drive mechanism (MD1) that makes the reflector holding member (4) swing around swing axis (SA1), and a second drive mechanism (MD2) that makes the first support member (5) swing around swing axis (SA2). The first drive mechanism (MD1) includes a magnetic field generation member (7) and a coil (8) that is opposite the magnetic field generation member (7). The magnetic field generation member (7) and the reflector holding member (4) are arranged so as to be incapable of moving relative to one another, and the coil (8) and the second support member (6) are arranged so as to be incapable of moving relative to one another.

Description

Reflector drive

The present disclosure relates to a reflector driving device mounted on, for example, a camera-equipped mobile device.

Conventionally, there is known an imaging device provided with an anti-vibration unit that supports a prism so that it can swing around two swing axes (see Patent Document 1). The anti-vibration unit includes a first holder block that holds the prism and can swing about the first swing axis, and a first holder block that swingably supports the first holder block and swings about the second swing axis. It has a movable second holder block and a vibration isolation base that swingably supports the second holder block.

JP 2020-177067 A

This anti-vibration unit has a drive mechanism consisting of a permanent magnet fixed to the first holder block and a coil fixed to the flexible substrate attached to the second holder block.

However, since the flexible substrate is fixed to the second holder block in this vibration isolation unit, the flexible substrate is deformed when the second holder block swings, and the restoring force of the deformed flexible substrate is the first. 2 will affect the holder block. The restoring force of the deformed flexible substrate may adversely affect the oscillation of the prism.

Therefore, it is desirable to provide a reflector driving device that can more stably swing a reflector such as a prism.

A reflector driving device according to an embodiment of the present invention includes: a reflector holding member capable of holding a reflector that bends light; and a first support that supports the reflector holding member so as to be swingable about a first axis. a member, a second support member that supports the first support member so as to be capable of swinging around a second shaft having an axial direction perpendicular to the axial direction of the first shaft, and a second support member that supports the reflector holding member in the first In a reflector driving device comprising: a first driving mechanism for rocking around an axis; and a second driving mechanism for rocking the first supporting member around the second axis, wherein the first driving mechanism is a magnetic field generating member and a coil facing the magnetic field generating member, wherein the magnetic field generating member and the reflector holding member are arranged so as not to move relative to each other; and the coil and the second support member move relative to each other. impossible to locate.

The reflector driving device described above can swing the reflector more stably.

It is a perspective view of a reflector drive. 2 is a schematic diagram of a camera module including the reflector driver of FIG. 1; FIG. FIG. 2 is an exploded perspective view of the reflector driving device of FIG. 1; It is a perspective view of a fixed side member. FIG. 4 is an exploded detailed view of the fixed side member; It is a front view of a biasing member. It is a right side view of a drive mechanism. It is a top view of a drive mechanism. It is a top view of a drive mechanism. It is an exploded perspective view of the movable side member seen from the diagonally upper right front. It is an exploded perspective view of the movable side member seen from the diagonally upper left front. It is an exploded perspective view of the movable side member seen from the lower right rear. FIG. 4 is a top view of a combination of a reflector holding member and a first support member; FIG. 4 is a cross-sectional view of a combination of a reflector holding member and a first support member; FIG. 4 is a cross-sectional view of a combination of a reflector holding member and a first support member; FIG. 4 is a front view of the combination of the first support member and the second support member; FIG. 4 is a cross-sectional view of a combination of a first support member and a second support member; FIG. 4 is a cross-sectional view of a combination of a first support member and a second support member; FIG. 11 is a perspective view of a biasing member arranged between a reflector holding member and a second supporting member, as viewed obliquely from the upper right front; FIG. 11 is a perspective view of a biasing member arranged between a reflector holding member and a second supporting member, as viewed obliquely from the upper left front; FIG. 4 is a right side view of a biasing member arranged between a reflector holding member and a second supporting member; FIG. 11 is an exploded perspective view of another configuration example of the reflector driving device; FIG. 11 is an exploded perspective view of still another configuration example of the reflector driving device; 14 is an exploded perspective view of a movable-side member that constitutes the reflector driving device of FIG. 13; FIG. FIG. 14 is an exploded perspective view of a movable member that constitutes the reflector driving device of FIG. 13, as viewed obliquely from the upper left front; FIG. 14 is an exploded perspective view of a movable member that constitutes the reflector driving device of FIG. 13 when viewed obliquely from the lower right rear.

A reflector driving device 101 according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the reflector driving device 101. FIG. FIG. 2 is a schematic diagram of a camera module in a camera-equipped mobile device on which reflector driving device 101 is mounted. FIG. 3 is an exploded perspective view of the reflector driving device 101. FIG.

　X1 in each of FIGS. 1 to 3 represents one direction of the X-axis constituting the three-dimensional orthogonal coordinate system, and X2 represents the other direction of the X-axis. Y1 represents one direction of the Y-axis forming the three-dimensional orthogonal coordinate system, and Y2 represents the other direction of the Y-axis. Similarly, Z1 represents one direction of the Z-axis forming the three-dimensional orthogonal coordinate system, and Z2 represents the other direction of the Z-axis. In this embodiment, the X1 side of the reflector driving device 101 corresponds to the front side (front side) of the reflector driving device 101, and the X2 side of the reflector driving device 101 corresponds to the rear side (back side) of the reflector driving device 101. side). The Y1 side of the reflector driving device 101 corresponds to the left side of the reflector driving device 101 , and the Y2 side of the reflector driving device 101 corresponds to the right side of the reflector driving device 101 . The Z1 side of the reflector driving device 101 corresponds to the upper side of the reflector driving device 101 , and the Z2 side of the reflector driving device 101 corresponds to the lower side of the reflector driving device 101 . The same applies to other drawings.

As shown in FIG. 1, the reflector driving device 101 is configured to swing the reflector 1 about the swing axis SA1 and the swing axis SA2. The reflector driving device 101 is used, for example, as an actuator for image stabilization in a camera module. In this embodiment, the swing axis SA1 as the first axis is parallel to the Y-axis, and the swing axis SA2 as the second axis is parallel to the Z-axis. However, the swing axis SA1 as the first axis may be an axis parallel to the Z axis. In this case, the swing axis SA2 as the second axis may be an axis parallel to the Y-axis.

As shown in FIG. 2, the reflector driving device 101 is typically arranged on the side closer to the object than the lens unit LU. It is configured to reach the image sensor IS through the unit LU.

Specifically, as shown in FIG. 3, the reflector driving device 101 is composed of a movable side member MB and a fixed side member FB. The movable-side member MB is accommodated in a housing HS that constitutes the fixed-side member FB. The housing HS is composed of a cover member 2 and a base member (second support member 6). In this embodiment, the cover member 2 is made of non-magnetic metal, and the second support member 6 as the base member is made of synthetic resin.

The reflector driving device 101 is configured so that the movable side member MB can be swung with respect to the fixed side member FB by the driving mechanism MD. Specifically, as shown in FIGS. 1 and 2, the reflector driving device 101 swings the reflector 1 with respect to the housing HS around the swing axis SA1 as indicated by a double arrow AR1, In addition, it is configured to be able to swing about a swing axis SA2 as indicated by a double arrow AR2.

The movable side member MB is a member supported by the fixed side member FB, and includes a reflector 1, a reflector holding member 4, a first support member 5, and a magnetic field generating member 7, as shown in FIG.

The reflector 1 is an optical element for bending light. Specifically, as shown in FIG. 2, the reflector 1 is configured to reflect the light LT incident from the subject toward the lens unit LU. In this embodiment, the reflector 1 is a prism. The reflector 1 may be a mirror.

The reflector holding member 4 is configured to hold the reflector 1 . In this embodiment, the reflector holding member 4 is made of synthetic resin. The reflector 1 is joined to the reflector holding member 4 with an adhesive.

The first support member 5 is configured to support the reflector holding member 4 so that the reflector holding member 4 can swing around the swing axis SA1 as the first axis. In this embodiment, the first support member 5 is made of synthetic resin.

The magnetic field generating member 7 is a member that constitutes the drive mechanism MD. In this embodiment, the magnetic field generating member 7 is composed of a permanent magnet magnetized with two poles. The magnetic field generating member 7 is composed of a combination of two dipole magnets, and is fixed to the lower side (Z2 side) of the reflector holding member 4 with an adhesive. In FIG. 3, for clarity, the permanent magnet has a coarse cross pattern on the north pole portion and a fine cross pattern on the south pole portion. The same applies to other drawings. The magnetic field generating member 7 may be composed of one quadrupole magnet.

The fixed side member FB is configured to support the movable side member MB. Specifically, the fixed member FB includes a wiring board 3, a second support member 6, a coil 8, and a sensor 10, as shown in FIGS. 4A and 4B. 4A and 4B show detailed views of the fixed side member FB. Specifically, FIG. 4A is a perspective view of the stationary member FB, and FIG. 4B is an exploded perspective view of the stationary member FB. 4A and 4B, illustration of the cover member 2 is omitted for clarity.

The wiring board 3 is a member for connecting each of the coil 8 and the sensor 10 to an external control section having a current supply function. In this embodiment, the wiring board 3 is configured by a flexible wiring board. However, the wiring board 3 may be a rigid wiring board or a rigid flexible wiring board. Also, the wiring board 3 is fixed to the second support member 6 with an adhesive.

The second support member 6 rotates around a swing axis SA2 as a second axis having an axial direction (Z-axis direction) perpendicular to the axial direction (Y-axis direction) of the swing axis SA1 as a first axis. It is configured to support the first support member 5 so that the support member 5 can swing.

The coil 8 is a member that constitutes the drive mechanism MD. In this embodiment, the coil 8 is a wound coil formed by winding a conductive wire whose surface is coated with an insulating material, and is fixed to the wiring board 3 . FIG. 3 omits illustration of the detailed winding state of the conductive wire for clarity. The same applies to other figures showing the coil 8. FIG. Note that the coil 8 may be a laminated coil, a thin film coil, or the like, instead of being wound with a conductive wire. In this case, the coil 8 may be formed integrally with the wiring board 3 by means of a conductive pattern.

Specifically, the coil 8 is attached to the wiring board 3 fixed to the second support member 6 and arranged so as to be immovable relative to the second support member 6 . In this embodiment, the coils 8 include a left coil 8L and a right coil 8R.

More specifically, the left coil 8L is arranged so as to be fitted into the left through portion 6HL formed in the bottom wall portion of the second support member 6 while attached to the wiring board 3. Further, the right coil 8R is arranged so as to be fitted in a right through portion 6HR formed in the bottom wall portion of the second support member 6 while attached to the wiring board 3 . The left coil 8L and the right coil 8R are configured to be individually energized without being connected in series.

The sensor 10 is configured to detect the position of the movable side member MB. In this embodiment, the sensor 10 is composed of a Giant Magneto Resistive effect (GMR) element capable of detecting the magnetic field generated by the magnetic field generating member 7 . However, sensor 10 may include other magnetoresistive elements such as Semiconductor Magneto Resistive (SMR) elements, Anisotropic Magneto Resistive (AMR) elements, or Tunnel Magneto Resistive (TMR) elements. An element may be used to detect the position of the movable member MB. Alternatively, the sensor 10 may be configured to detect the position of the movable member MB using a Hall element.

Specifically, the sensor 10 includes a left sensor 10L capable of detecting the magnetic field generated by the left end of the magnetic field generating member 7 and a right sensor 10R capable of detecting the magnetic field generated by the right end of the magnetic field generating member 7. include.

The left sensor 10L is attached to the wiring board 3 while being surrounded by the left coil 8L, and the right sensor 10R is attached to the wiring board 3 while being surrounded by the right coil 8R. The sensor 10 is configured to detect the position of the movable member MB rocking around the rocking axis SA1 and the rocking axis SA2 based on the outputs of the left sensor 10L and the right sensor 10R. ing.

The movable side member MB is biased by a biasing member 9 and is configured to be pressed against the fixed side member FB. Specifically, the biasing member 9 includes a first biasing member that biases the reflector holding member 4 toward the first support member 5 (X2 side) in the direction parallel to the X axis, and a first support member. and a second biasing member that biases the member 5 toward the second support member 6 (X2 side). In this embodiment, the biasing member 9 is formed of a spring member and serves as both a first biasing member and a second biasing member.

Specifically, the biasing member 9 is composed of a pair of spring members (a left spring member 9L and a right spring member 9R), and functions to bias the reflector holding member 4 toward the X2 side (rear side). 1 and a function of urging the support member 5 toward the X2 side (rear side).

However, the first biasing member and the second biasing member may be independent members. For example, the first biasing member may be composed of one or more spring members, and the second biasing member may be composed of another one or more spring members.

With this configuration, the biasing member 9 can prevent the reflector holding member 4 from moving in the direction away from the swing axis SA1 and prevent the first support member 5 from moving in the direction away from the swing axis SA2. You can prevent it from slipping.

Next, the details of the biasing member 9 will be described with reference to FIG. FIG. 5 is a front view of the biasing member 9. FIG.

The biasing member 9 includes an inner fixing portion 9M fixed to a pedestal portion 4P (see FIG. 3) on the side wall portion of the reflector holding member 4, and a pedestal portion 6P (see FIG. 3) on the side wall portion of the second support member 6. ), and an elastic arm portion 9G connecting the inner fixing portion 9M and the outer fixing portion 9F.

Specifically, the biasing member 9 includes a right spring member 9R and a left spring member 9L that are spaced apart.

The right spring member 9R includes a right inner fixing portion 9MR fixed to a right pedestal portion 4PR (see FIG. 3) of the right wall portion of the reflector holding member 4, and a right pedestal portion of the right wall portion of the second support member 6. It has a right outer fixing part 9FR fixed to 6PR (see FIG. 3) and a right elastic arm part 9GR connecting the right inner fixing part 9MR and the right outer fixing part 9FR. The right elastic arm portion 9GR includes a right upper elastic arm portion 9GUR that connects the upper end portion of the right inner fixing portion 9MR and the upper end portion of the right outer fixing portion 9FR, and the lower end portion of the right inner fixing portion 9MR and the right outer fixing portion. and a lower right elastic arm portion 9GDR that connects with the lower end portion of 9FR. At least one of the right inner fixing portion 9MR and the right outer fixing portion 9FR may be vertically divided.

Similarly, the left spring member 9L includes a left inner fixing portion 9ML fixed to the left pedestal portion 4PL (not visible in FIG. 3) of the left wall portion of the reflector holding member 4, and a left wall portion of the second support member 6. and a left elastic arm portion 9GL connecting the left inner fixing portion 9ML and the left outer fixing portion 9FL. The left elastic arm portion 9GL includes the upper left elastic arm portion 9GUL connecting the upper end portion of the left inner fixing portion 9ML and the upper end portion of the left outer fixing portion 9FL, and the lower end portion of the left inner fixing portion 9ML and the left outer fixing portion. and a lower left elastic arm portion 9GDL that connects with the lower end portion of 9FL. At least one of the left inner fixing portion 9ML and the left outer fixing portion 9FL may be vertically divided.

In the present embodiment, as shown in FIG. 5, the biasing member 9 has the swing axis SA1 located between the upper left elastic arm portion 9GUL and the left lower elastic arm portion 9GDL in a front view, and the upper right elastic arm portion 9GDL. It is attached to the reflector holding member 4 and the second support member 6 so that the swing axis SA1 is positioned between the elastic arm portion 9GUR and the lower right elastic arm portion 9GDR.

Next, details of the drive mechanism MD will be described with reference to FIGS. 6A to 6C. 6A-6C are detailed views of the drive mechanism MD. In FIGS. 6A to 6C, illustration of members other than the driving mechanism MD in the reflector driving device 101 is omitted for clarity. Specifically, FIG. 6A is a right side view of the drive mechanism MD, and FIGS. 6B and 6C are top views of the drive mechanism MD. In FIGS. 6B and 6C, the magnetic field generating member 7 is represented only in outline for the sake of clarity. 6A, 6B, and 6C show the states of the magnetic field generating member 7 and the coil 8 when the drive mechanism MD is in the initial state with solid lines. The initial state is a state in which the drive mechanism MD is not driven, that is, a state of the drive mechanism MD when no current is flowing through either the left coil 8L or the right coil 8R.

The drive mechanism MD is a mechanism for swinging the movable side member MB with respect to the fixed side member FB using electromagnetic force, and is composed of a magnetic field generating member 7 and a coil 8 . Specifically, the drive mechanism MD includes a first drive mechanism MD1 that swings the reflector holding member 4 around the swing axis SA1, and a second drive mechanism MD1 that swings the first support member 5 around the swing axis SA2. 2 drive mechanism MD2.

In this embodiment, the drive mechanism MD is configured to function as both the first drive mechanism MD1 and the second drive mechanism MD2.

The first drive mechanism MD1 has an electromagnetic force based on the magnetic field generated by the magnetic field generating member 7 and the current flowing through the left coil 8L, and an electromagnetic force based on the magnetic field generated by the magnetic field generating member 7 and the current flowing through the right coil 8R. is used to swing the reflector holding member 4 with respect to the first supporting member 5 around the swing axis SA1.

6A and 6B show the state of the magnetic field generating member 7 when the reflector holding member 4 rocks clockwise about the rocking axis SA1 in a right side view. The dashed line indicates the state of the magnetic field generating member 7 when the reflector holding member 4 swings counterclockwise.

Specifically, when the driving mechanism MD functions as the first driving mechanism MD1 and rocks the reflector holding member 4 clockwise around the rocking axis SA1, the block indicated by the dotted line in FIG. 6B As indicated by the arrows, both the left end (the end on the Y1 side) and the right end (the end on the Y2 side) of the magnetic field generating member 7 are biased forward (toward the X1 side).

In this case, in the example shown in FIG. 6B, the current is supplied to the left coil 8L so that the current flows clockwise around the coil axis CAL (see FIG. 3) when viewed from above, and the coil axis CAR (see FIG. 3.) is supplied to the right coil 8R so that the current flows clockwise around. The magnitude of the current flowing through the left coil 8L and the magnitude of the current flowing through the right coil 8R are the same. The left coil 8L and the right coil 8R are formed to have the same number of turns.

Conversely, when the drive mechanism MD functions as the first drive mechanism MD1 to swing the reflector holding member 4 counterclockwise around the swing axis SA1, the block arrow indicated by the dashed line in FIG. 6B is used. , both the left end (the end on the Y1 side) and the right end (the end on the Y2 side) of the magnetic field generating member 7 are urged rearward (toward the X2 side).

In this case, in the example shown in FIG. 6B, the current is supplied to the left coil 8L so that the current flows counterclockwise around the coil axis CAL when viewed from above, and the current flows counterclockwise around the coil axis CAR. A current is supplied to the right coil 8R so that the current flows. The magnitude of the current flowing through the left coil 8L and the magnitude of the current flowing through the right coil 8R are the same.

The second drive mechanism MD2 has an electromagnetic force based on the magnetic field generated by the magnetic field generating member 7 and the current flowing through the left coil 8L, and an electromagnetic force based on the magnetic field generated by the magnetic field generating member 7 and the current flowing through the right coil 8R. is used to swing the first support member 5 relative to the second support member 6 around the swing axis SA2.

6C shows the state of the magnetic field generating member 7 when the first support member 5 swings clockwise about the swing axis SA2 in a top view, and the state of the magnetic field generating member 7 when the first support member 7 swings around the swing axis SA2. A dashed line indicates the state of the magnetic field generating member 7 when the member 5 swings counterclockwise.

Specifically, when the drive mechanism MD functions as the second drive mechanism MD2 to swing the first support member 5 clockwise around the swing axis SA2, the block indicated by the dotted line in FIG. 6C As indicated by the arrows, the left end (Y1 side end) of the magnetic field generating member 7 is biased backward, and the right end (Y2 side end) of the magnetic field generating member 7 is biased forward. be done.

In this case, in the example shown in FIG. 6C, the current is supplied to the left coil 8L so that the current flows counterclockwise around the coil axis CAL when viewed from above, and the current flows clockwise around the coil axis CAR. A current is supplied to the right coil 8R so that a current flows. The magnitude of the current flowing through the left coil 8L and the magnitude of the current flowing through the right coil 8R are the same.

Conversely, when the drive mechanism MD functions as the second drive mechanism MD2 to swing the first support member 5 counterclockwise about the swing axis SA2, the block arrow indicated by the dashed line in FIG. 6C , the left end (the end on the Y1 side) of the magnetic field generating member 7 is urged forward, and the right end (the end on the Y2 side) of the magnetic field generating member 7 is urged rearward. be.

In this case, in the example shown in FIG. 6C, the current is supplied to the left coil 8L so that the current flows clockwise around the coil axis CAL when viewed from above, and the current flows counterclockwise around the coil axis CAR. A current is supplied to the right coil 8R so that a current flows. The magnitude of the current flowing through the left coil 8L and the magnitude of the current flowing through the right coil 8R are the same.

When the rocking of the reflector holding member 4 about the rocking axis SA1 and the rocking of the first support member 5 about the rocking axis SA2 are performed simultaneously, the magnitude of the current flowing through the left coil 8L and the right coil 8R are adjusted to be different from each other. That is, the reflector driving device 101 makes the magnitude of the current flowing through the left coil 8L and the magnitude of the current flowing through the right coil 8R different, thereby causing the reflector holding member 4 to swing and swing about the swing axis SA1. At the same time, the first support member 5 can swing about the axis SA2.

Next, details of the movable-side member MB will be described with reference to FIGS. 7A to 7C. 7A to 7C are exploded perspective views of the movable side member MB viewed from three different angles. Specifically, FIG. 7A is an exploded perspective view of the movable-side member MB as seen obliquely from the upper right front. FIG. 7B is an exploded perspective view of the movable-side member MB as seen obliquely from the upper left front. FIG. 7C is an exploded perspective view of the movable-side member MB as seen obliquely from the lower right rear.

A recess 4E capable of accommodating the magnetic field generating member 7 is formed in the reflector holding member 4 . Specifically, as shown in FIG. 7C, a recess 4E capable of accommodating the magnetic field generating member 7 is formed in the bottom wall portion of the reflector holding member 4. As shown in FIG.

The reflector holding member 4 and the first support member 5 are connected by the first shaft portion CN1 so that the reflector holding member 4 can swing with respect to the first support member 5.

The first shaft portion CN1 is a mechanism that connects the reflector holding member 4 and the first support member 5 so that the reflector holding member 4 can swing with respect to the first support member 5. It is composed of a convex portion 4T formed on the member 4 and a concave portion 5S formed on the first support member 5. As shown in FIG.

Specifically, the first shaft portion CN1 includes a left shaft portion CN1L and a right shaft portion CN1R. The left shaft portion CN1L includes a left convex portion 4TL formed on the outside (left side) of the left wall portion of the reflector holding member 4 and a left concave portion formed on the inside (right side) of the left wall portion of the first support member 5. 5SL and

Similarly, the right shaft portion CN1R is formed on the right convex portion 4TR formed outside (right side) of the right wall portion of the reflector holding member 4 and inside (left side) of the right wall portion of the first support member 5. and a right recessed portion 5SR.

Here, the state of the first shaft portion CN1 when the reflector holding member 4 and the first supporting member 5 are combined will be described with reference to FIGS. 8A to 8C. 8A-8C are detailed views of the combination of reflector holding member 4 and first support member 5. FIG. Specifically, FIG. 8A is a top view of the combination of the reflector holding member 4 and the first support member 5. FIG. 8B is a cross-sectional view of the combination of the reflector holding member 4 and the first support member 5 on a virtual plane parallel to the YZ plane including the line segment L1 in FIG. 8A. 8C is a cross-sectional view of the combination of the reflector holding member 4 and the first support member 5 on a virtual plane parallel to the XZ plane including the line segment L2 in FIG. 8A. 8A to 8C, the reflector holding member 4 has a coarse dot pattern and the first support member 5 has a fine dot pattern for clarity.

As shown in FIGS. 8B and 8C, the right protrusion 4TR has a semi-cylindrical tip, and the right recess 5SR includes a semi-cylindrical concave surface that engages with the right protrusion 4TR. It is configured. The same applies to the left convex portion 4TL and the left concave portion 5SL.

With this configuration, when the reflector holding member 4 swings with respect to the first support member 5, it is possible to suppress the vertical displacement of the reflector holding member 4, and it is possible to suppress the horizontal displacement.

Further, as shown in FIGS. 7A to 7C, the first support member 5 and the second support member 6 are configured so that the first support member 5 can swing relative to the second support member 6 by the second shaft portion CN2. are connected so that

The second shaft portion CN2 is a mechanism that connects the first support member 5 and the second support member 6 so that the first support member 5 can swing with respect to the second support member 6. It is composed of a convex portion 5V formed in the member 5 and a concave portion 6S formed in the second support member 6 (see FIG. 4A).

Specifically, the second shaft portion CN2 includes an upper shaft portion CN2U and a lower shaft portion CN2D. The upper shaft portion CN2U is composed of an upper convex portion 5VU formed at the center of the upper end of the outer side (rear side) of the rear wall portion of the first support member 5 and an inner side (front side) of the rear wall portion of the second support member 6. and a concave portion 6S formed in the central portion.

Similarly, the lower shaft portion CN2D includes a lower convex portion 5VD formed at the center portion of the lower end of the outer side (rear side) of the rear wall portion of the first support member 5, and the rear wall portion of the second support member 6. and a concave portion 6S formed in the central portion of the inner side (front side).

Here, the state of the second shaft portion CN2 when the first support member 5 and the second support member 6 are combined will be described with reference to FIGS. 9A to 9C. 9A-9C are detailed views of the combination of the first support member 5 and the second support member 6. FIG. Specifically, FIG. 9A is a front view of the combination of the first support member 5 and the second support member 6. FIG. FIG. 9B is a cross-sectional view of the combination of the first support member 5 and the second support member 6 on a virtual plane parallel to the XY plane containing line L3 in FIG. 9A. FIG. 9C is a cross-sectional view of the combination of the first support member 5 and the second support member 6 on an imaginary plane parallel to the XZ plane containing line L4 in FIG. 9A. 9A to 9C, the first supporting member 5 has a fine dot pattern and the second supporting member 6 has a finer dot pattern for clarity.

As shown in FIGS. 9B and 9C, each of the upper convex portion 5VU and the lower convex portion 5VD has a hemispherical tip. It is configured to include a semi-cylindrical concave surface that mates with the 5VD.

With this configuration, when the first support member 5 swings with respect to the second support member 6, the first support member 5 can be prevented from being displaced in the vertical direction and can be prevented from being displaced in the lateral direction.

Next, details of the biasing member 9 will be described with reference to FIGS. 10A, 10B, and 11. FIG. 10A and 10B are perspective views of the biasing member 9 arranged between the reflector holding member 4 and the second supporting member 6. FIG. Specifically, FIG. 10A is a perspective view seen from diagonally upper right front, and FIG. 10B is a perspective view seen from diagonally upper left front. 11 is a right side view of the biasing member 9 arranged between the reflector holding member 4 and the second supporting member 6. FIG. 10A, 10B, and 11, the reflector holding member 4 has a coarse dot pattern and the second support member 6 has a fine dot pattern for clarity.

The biasing member 9 includes the right spring member 9R and the left spring member 9L that are spaced apart from each other, as described above. Specifically, the right spring member 9R includes a right inner fixing portion 9MR fixed to the right pedestal portion 4PR of the right wall portion of the reflector holding member 4, and a right pedestal portion 6PR of the right wall portion of the second support member 6. the right outer fixed part 9FR fixed to the right outer fixed part 9FR, the upper right elastic arm part 9GUR connecting the upper end of the right inner fixed part 9MR and the upper end of the right outer fixed part 9FR, the lower end of the right inner fixed part 9MR and the right outer side and a lower right elastic arm portion 9GDR that connects with the lower end portion of the fixed portion 9FR.

In the present embodiment, the right pedestal portion 4PR of the right wall portion of the reflector holding member 4 includes two projecting portions 4AR having a round convex shape projecting forward (X1 direction) from the front side (X1 side) surface. . The projecting portion 4AR corresponds to two through holes formed in the right inner fixing portion 9MR.

Specifically, the right inner fixing portion 9MR is attached and fixed to the right pedestal portion 4PR on which the projecting portion 4AR is formed. Fixing of the right inner fixing portion 9MR to the right pedestal portion 4PR is achieved by applying an adhesive to the projecting portion 4AR inserted through a through hole formed in the right inner fixing portion 9MR.

Further, in the present embodiment, the right pedestal portion 6PR of the right wall portion of the second support member 6 has a round convex upper right projecting portion 6AUR that projects forward (X1 direction) from the front side (X1 side) surface. and a lower right projecting portion 6ADR. The upper right projecting portion 6AUR corresponds to a through hole formed in the upper portion of the right outer fixing portion 9FR, and the lower right projecting portion 6ADR corresponds to a through hole formed in the lower portion of the right outer fixing portion 9FR. ing.

Specifically, the right outer fixed part 9FR is attached and fixed to the right base part 6PR on which the upper right projecting part 6AUR and the lower right projecting part 6ADR are formed. The fixation of the right outer fixing portion 9FR to the right pedestal portion 6PR is realized by heat caulking the upper right protrusion 6AUR and the lower right protrusion 6ADR which are inserted through the through holes formed in the right outer fixing portion 9FR. be done.

In FIGS. 10A and 10B, the upper right protruding portion 6AUR and the lower right protruding portion 6ADR are shown in a state in which their tips are deformed after being heat crimped. The same applies to other drawings illustrating the upper right projection 6AUR and the lower right projection 6ADR.

Similarly, the left spring member 9L is fixed to the left inner fixing portion 9ML fixed to the left pedestal portion 4PL of the left wall portion of the reflector holding member 4 and to the left pedestal portion 6PL of the left wall portion of the second support member 6. the left outer fixing part 9FL, the left upper elastic arm part 9GUL connecting the upper end of the left inner fixing part 9ML and the upper end of the left outer fixing part 9FL, the lower end of the left inner fixing part 9ML and the left outer fixing part and a lower left elastic arm portion 9GDL that connects with the lower end portion of 9FL.

In this embodiment, the left pedestal portion 4PL of the left wall portion of the reflector holding member 4 includes two projecting portions 4AL having a round convex shape projecting forward (X1 direction) from the front side (X1 side) surface. . The projecting portion 4AL corresponds to two through holes formed in the left inner fixing portion 9ML.

Specifically, the left inner fixing portion 9ML is attached and fixed to the left pedestal portion 4PL on which the projecting portion 4AL is formed. Fixing of the left inner fixing portion 9ML to the left pedestal portion 4PL is achieved by applying an adhesive to the projecting portion 4AL inserted through a through hole formed in the left inner fixing portion 9ML.

Further, in the present embodiment, the left pedestal portion 6PL of the left wall portion of the second support member 6 has a round convex upper left projecting portion 6AUL projecting forward (X1 direction) from the front side (X1 side) surface. and a lower left projecting portion 6ADL. The left upper projecting portion 6AUL corresponds to the through hole formed in the upper portion of the left outer fixing portion 9FL, and the left lower projecting portion 6ADL corresponds to the through hole formed in the lower portion of the left outer fixing portion 9FL. there is

Specifically, the left outer fixing part 9FL is attached and fixed to the left pedestal part 6PL on which the upper left projecting part 6AUL and the left lower projecting part 6ADL are formed. The fixation of the left outer fixing portion 9FL to the left pedestal portion 6PL is realized by thermally caulking the upper left projecting portion 6AUL and the left lower projecting portion 6ADL which are inserted through through holes formed in the left outer fixing portion 9FL. be.

In FIGS. 10A and 10B, the upper left protruding portion 6AUL and the lower left protruding portion 6ADL are illustrated in a state in which the tips are deformed after being thermally crimped. The same applies to other drawings illustrating the left upper projecting portion 6AUL and the left lower projecting portion 6ADL.

In addition, as shown in FIG. 11, the right spring member 9R is configured such that the right inner fixing portion 9MR and the right outer fixing portion 9FR are in an initial state in which neither the first drive mechanism MD1 nor the second drive mechanism MD2 is driven. It is fixed to the reflector holding member 4 and the second supporting member 6 so as to be substantially parallel. Specifically, in the initial state, the right inner fixing portion 9MR and the right outer fixing portion 9FR are arranged with an interval DT1 in the X-axis direction and substantially parallel to each other along the Z-axis direction. It is fixed to the reflector holding member 4 and the second supporting member 6 . The same applies to the left spring member 9L.

With this arrangement, the biasing member 9 constituted by the left spring member 9L and the right spring member 9R can bias the reflector holding member 4 rearward (X2 side) in the initial state, and at the same time, 1 support member 5 can be biased to the rear side (X2 side). In other words, the biasing member 9 can serve as both the first biasing member and the second biasing member. In other words, the biasing member 9 can function as both the first biasing member and the second biasing member.

Next, a reflector driving device 101A, which is another structural example of the reflector driving device 101, will be described with reference to FIG. FIG. 12 is an exploded perspective view of the reflector driving device 101A and corresponds to FIG.

As shown in FIG. 12, the reflector driving device 101A has a wiring board 3 including a central wiring board 3C, a left wiring board 3L, and a right wiring board 3R, a magnetic field generating member 7 having a central magnet 7C, a left magnet 7L, and right magnet 7R; coil 8 includes center coil 8C, left coil 8L, and right coil 8R; and sensor 10 includes center sensor 10C and right sensor 10R. different.

Specifically, the central magnet 7C is composed of a combination of two dipole magnets, and is fixed to the lower side (Z2 side) of the reflector holding member 4 with an adhesive. The left magnet 7L is composed of a combination of two dipole magnets and is fixed to the left wall of the first support member 5 with an adhesive. The right magnet 7R is composed of a combination of two dipole magnets and is fixed to the right wall of the first support member 5 with an adhesive. The left magnet 7L is disposed in the left recess 5EL (not visible in FIG. 12; see FIGS. 14A to 14C) provided in the first support member 5, and the right magnet 7R is disposed in the right recess 5EL provided in the first support member 5. It is arranged in the recess 5ER.

The left coil 8L is arranged so as to be fitted into the left through portion 6HL formed in the left wall portion of the second support member 6 while attached to the left wiring board 3L. The central coil 8C is arranged so as to be fitted in a central through portion 6HC formed in the bottom wall portion of the second support member 6 while attached to the central wiring board 3C. Further, the right coil 8R is arranged so as to be fitted in the right through portion 6HR formed in the right wall portion of the second support member 6 while attached to the right wiring board 3R. The conductor patterns respectively formed on the left wiring board 3L, the central wiring board 3C, and the right wiring board 3R are connected to each other through solder. The left wiring board 3L, the central wiring board 3C, and the right wiring board 3R, which constitute the wiring board 3, are fixed to the second support member 6 with an adhesive. Thus, the left coil 8L and the right coil 8R are arranged to face each other with the reflector holding member 4 and the first support member 5 interposed therebetween in the axial direction of the swing axis SA1. Each of the left coil 8L and the right coil 8R is arranged such that the axial direction of the coil axis thereof is perpendicular to the axial direction of the coil axis of the central coil 8C.

The central sensor 10C is attached to the central wiring board 3C while being surrounded by the central coil 8C, and is configured to detect the position of the reflector holding member 4 swinging around the swing axis SA1. The right sensor 10R is attached to the right wiring board 3R while being surrounded by the right coil 8R, and is configured to detect the position of the first support member 5 swinging around the swing axis SA2. Sensor 10 may include a left sensor instead of or in addition to right sensor 10R. In this case, the left sensor is attached to the left wiring board 3L while being surrounded by the left coil 8L, and configured to detect the position of the first support member 5 swinging around the swing axis SA2.

The first drive mechanism MD1 uses an electromagnetic force based on the magnetic field generated by the central magnet 7C and the current flowing through the central coil 8C to swing the reflector holding member 4 relative to the first supporting member 5 around the swing axis SA1. to oscillate.

The second drive mechanism MD2 uses an electromagnetic force based on the magnetic field generated by the left magnet 7L and the current flowing through the left coil 8L, and an electromagnetic force based on the magnetic field generated by the right magnet 7R and the current flowing through the right coil 8R. Then, the first support member 5 is caused to swing relative to the second support member 6 around the swing axis SA2.

With this configuration, the reflector driving device 101A can stably swing the reflector 1 in the same manner as the reflector driving device 101.

Next, a reflector driving device 101B, which is still another structural example of the reflector driving device 101, will be described with reference to FIGS. 13 and 14A to 14C. FIG. 13 is an exploded perspective view of the reflector driving device 101B and corresponds to FIG. 14A to 14C are exploded perspective views of the movable side member MB viewed from three different angles, corresponding to FIGS. 7A to 7C. Specifically, FIG. 14A is an exploded perspective view of the movable-side member MB as seen obliquely from the upper right front. FIG. 14B is an exploded perspective view of the movable-side member MB as seen obliquely from the upper left front. FIG. 14C is an exploded perspective view of the movable-side member MB as seen obliquely from the lower right rear.

As shown in FIG. 13, the reflector driving device 101B has a central coil 8C, a left coil 8L, and a right coil 8R (not visible in FIG. 13) attached to one wiring board 3. It differs from device 101A. In the reflector driving device 101A, the central coil 8C is attached to the central wiring board 3C, the left coil 8L is attached to the left wiring board 3L, and the right coil 8R is attached to the right wiring board 3R. In the reflector drive device 101B, similarly to the reflector drive device 101A, the left magnet 7L is arranged in the left recess 5EL provided in the first support member 5 and fixed with an adhesive, and the right magnet 7R is placed in the first support member 5. It is arranged in a right recessed portion 5ER provided in the support member 5 and fixed with an adhesive.

In addition, as shown in FIGS. 14A to 14C, the reflector driving device 101B includes a recess 4S formed in the reflector holding member 4, a recess 5S formed in the first support member 5, and a first shaft portion CN1. It differs from the reflector driving device 101 in that it is configured with one ball B1. In the reflector driving device 101, the first shaft portion CN1 is composed of the convex portion 4T formed in the reflector holding member 4 and the concave portion 5S formed in the first support member 5. As shown in FIG.

13 and FIGS. 14A to 14C, the reflector driving device 101B has a recess 5W formed in the first support member 5 and a recess 5W formed in the second support member 6. It differs from the reflector driving device 101 in that it is composed of 6S and the second ball B2. In the reflector driving device 101, the second shaft portion CN2 is composed of the convex portion 5V formed in the first support member 5 and the concave portion 6S formed in the second support member 6. As shown in FIG.

In the reflector driving device 101B, as in the case of the reflector driving device 101, the reflector holding member 4 and the first supporting member 5 are connected to each other by the first shaft portion CN1 so that the reflector holding member 4 is connected to the first supporting member 5. is connected so as to be able to swing with respect to the

Specifically, the first shaft portion CN1 includes a left shaft portion CN1L and a right shaft portion CN1R. The left shaft portion CN1L is formed inside (right side) of the left wall portion of the first support member 5 and the left recessed portion 4SL formed at the rear end portion of the outside (left side) of the left wall portion of the reflector holding member 4. and a left ball B1L sandwiched between the left recess 4SL and the left recess 5SL.

Similarly, the right shaft portion CN1R includes a right concave portion 4SR formed at the outer (right) rear end portion of the right wall portion of the reflector holding member 4 and the inner (left) right wall portion of the first support member 5. and a right ball B1R sandwiched between the right recess 4SR and the right recess 5SR.

Further, in the reflector driving device 101B, as in the case of the reflector driving device 101, the first support member 5 and the second support member 6 are connected by the second shaft portion CN2 so that the first support member 5 is the second support member. It is connected to the member 6 so as to be swingable.

Specifically, the second shaft portion CN2 includes an upper shaft portion CN2U and a lower shaft portion CN2D. The upper shaft portion CN2U is composed of an upper concave portion 5WU formed in the center of the upper end of the outer side (rear side) of the rear wall portion of the first support member 5 and the center of the inner side (front side) of the rear wall portion of the second support member 6. and an upper ball B2U sandwiched between the upper recess 5WU and the recess 6S.

Similarly, the lower shaft portion CN2D is composed of a lower concave portion 5WD formed in the outer (rear) lower end central portion of the rear wall portion of the first support member 5 and the inner side of the rear wall portion of the second support member 6. It is composed of a concave portion 6S formed in the (front side) central portion, and a lower ball B2D sandwiched between the lower concave portion 5WD and the concave portion 6S.

Note that in the present embodiment, both the first ball B1 and the second ball B2 are made of synthetic resin. However, the first ball B1 and the second ball B2 may be made of other material such as metal.

With this configuration, the reflector driving device 101B can stably swing the reflector 1 in the same manner as the reflector driving device 101 and the reflector driving device 101A.

For example, as shown in FIG. 3, the reflector driving device 101 according to the embodiment of the present invention includes a reflector holding member 4 capable of holding a reflector 1 that bends light, and the reflector holding member 4 as a first axis. and a second shaft having an axial direction non-parallel (perpendicular) to the axial direction of the swing axis SA1. A second support member 6 that swingably supports around a swing axis SA2, a first drive mechanism MD1 that swings the reflector holding member 4 around a swing axis SA1, and a first support member 5 that swings. and a second drive mechanism MD2 that swings around the drive shaft SA2. The first drive mechanism MD1 includes a magnetic field generating member 7 and a coil 8 facing the magnetic field generating member 7. As shown in FIG. The axial direction of the swing shaft SA1 and the axial direction of the swing shaft SA2 are perpendicular to each other, which means that the axial directions of the swing shaft SA1 and the swing shaft SA2 are perpendicular to each other. Alternatively, the swing axis SA1 or an extension line of the swing axis SA1 and the swing axis SA2 or an extension line of the swing axis SA2 are orthogonal to each other. The magnetic field generating member 7 and the reflector holding member 4 are arranged so as not to move relative to each other. The coil 8 and the second support member 6 are arranged so as not to move relative to each other.

The coil 8 may be provided on the wiring board 3 as shown in FIGS. 4A and 4B. In this case, the wiring board 3 may be fixed to the second support member 6 .

The magnetic field generating member 7 may be configured to extend along the swing axis SA1, as shown in FIG. In this case, the coil 8 has a coil axis CA that extends in an axial direction perpendicular to the axial direction (Y-axis direction) of the swing axis SA1, and sandwiches a plane that is orthogonal to the swing axis SA1 and includes the swing axis SA2. may include a left coil 8L as a first coil and a right coil 8R as a second coil, which are arranged to face each other. Specifically, the left coil 8L may have a coil axis CAL parallel to the swing axis SA2 and may be arranged to face the first portion (left end) of the magnetic field generating member 7 . Also, the right coil 8R may have a coil axis CAR parallel to the swing axis SA2 and may be arranged to face the second portion (right end) of the magnetic field generating member 7 .

This configuration can swing the reflector 1 such as a prism more stably than the configuration in which the flexible wiring board is attached to the movable side member MB. This is because, in this configuration, the coil 8 is attached to the fixed side member FB (the second support member 6), so the wiring board 3 does not need to be attached to the movable side member MB. That is, even if the wiring board 3 is a flexible wiring board, the wiring board 3 does not deform when the movable member MB swings, and the restoring force of the deformed wiring board 3 acts on the movable member MB. This is because such a restoring force does not adversely affect the rocking motion of the reflector 1 .

The left coil 8L as the first coil and the right coil 8R as the second coil may be configured to be individually energized without being connected in series. The magnetic field generating member 7, the left coil 8L and the right coil 8R may constitute a second drive mechanism MD2. In this configuration, the driving mechanism MD composed of the magnetic field generating member 7 and the coil 8 (the left coil 8L and the right coil 8R) can serve both as the first driving mechanism MD1 and the second driving mechanism MD2. Therefore, this configuration can realize the miniaturization of the reflector driving device 101 as compared with the case where the first driving mechanism MD1 and the second driving mechanism MD2 are composed of separate members.

As shown in FIG. 3, the magnetic field generating member 7 is desirably arranged such that different magnetic poles are arranged along a direction perpendicular to the respective axial directions of the oscillation axis SA1 and the oscillation axis SA2 (direction parallel to the X axis). It is configured. In the example shown in FIG. 3, the lower surface (Z2 side surface) of the magnetic field generating member 7 is configured such that the front side (X1 side) is the N pole and the rear side (X2 side) is the S pole. In an initial state in which the coils 8 (the left coil 8L and the right coil 8R) are not energized, the left coil 8L and the right coil 8R each have the first region facing one magnetic pole of the magnetic field generating member 7 and the other magnetic pole. It is configured to have a second region facing the magnetic pole. The magnetic field generating member 7 may be composed of one or two dipole magnets or one quadrupole magnet.

In this embodiment, the magnetic field generating member 7 is composed of two elongated dipole magnets extending along the Y-axis, as shown in FIG. As shown in FIG. 6B, the left coil 8L, in the initial state, consists of a left front bundled wire portion 8LF facing the N pole portion on the bottom surface of the magnetic field generating member 7 and an S pole portion on the bottom surface of the magnetic field generating member 7. and a left rear bundled wire portion 8LB facing each other. As shown in FIG. 6B, the right coil 8R, in the initial state, has a front right bundle portion 8RF facing the N pole portion on the bottom surface of the magnetic field generating member 7 and an S pole portion on the bottom surface of the magnetic field generating member 7. and a right rear bundled wire portion 8RB facing each other. Note that the wire bundle portion means a portion where the wire members forming the coil 8 extend linearly.

This configuration brings about an effect that the magnetic field generating member 7 and the coil 8 can efficiently function as the first drive mechanism MD1 and the second drive mechanism MD2.

The reflector driving device 101 may have a sensor 10 that detects the magnetic field from the magnetic field generating member 7 . The sensor 10 includes a first sensor arranged to face one end portion in the longitudinal direction of the magnetic field generating member 7 and a second sensor arranged to face the other end portion in the longitudinal direction of the magnetic field generating member 7. , may be included.

In this embodiment, as shown in FIGS. 4A and 4B, the reflector driving device 101 includes a left sensor 10L arranged to face the left end of the magnetic field generating member 7, and a left sensor 10L facing the right end of the magnetic field generating member 7. and a right sensor 10R positioned as a

In the reflector drive device 101 shown in FIGS. 4A and 4B, the left sensor 10L and the right sensor 10R are spaced apart. Therefore, even if the reflector holding member 4 swings around the swing axis SA2 together with the first support member 5, the position of the reflector holding member 4 (reflector 1) is not detected by the sensor 10 (left sensor 10L). and right sensor 10R). In addition, the position of the reflector holding member 4 (reflector 1) is the swing angle position of the reflector 1 around the swing axis SA1 and the swing angle position of the reflector 1 around the swing axis SA2. include.

A reflector driving device 101 (including a reflector driving device 101A shown in FIG. 12 and a reflector driving device 101B shown in FIG. 13) according to an embodiment of the present invention is shown in FIGS. 3, 12, or 13, for example. , a reflector holding member 4 capable of holding a reflector 1 that bends light, and a first support member 5 supporting the reflector holding member 4 so as to be swingable around a swing axis SA1 serving as a first axis. and a second support member 6 which supports the first support member 5 so as to be swingable about a swing shaft SA2 as a second shaft having an axial direction non-parallel (perpendicular) to the axial direction of the swing shaft SA1. , a first drive mechanism MD1 for swinging the reflector holding member 4 around a swing axis SA1, and a second drive mechanism MD2 for swinging the first support member 5 around a swing axis SA2. there is The reflector driving device 101 further includes a first biasing member that biases the reflector holding member 4 toward the first support member 5, and a first biasing member that biases the first support member 5 toward the second support member 6. and a second biasing member. In the example shown in FIG. 3, the biasing member 9 functioning as the first biasing member is tilted in a direction (parallel to the X-axis) non-parallel (perpendicular) to the axial direction (Y-axis direction) of the swing axis SA1. , the biasing member 9 that biases the reflector holding member 4 toward the first support member 5 side (X2 side) and functions as a second biasing member is non-rotatable in the axial direction (Z-axis direction) of the swing axis SA2. In a parallel (perpendicular) direction (a direction parallel to the X axis), the first support member 5 is biased toward the second support member 6 (X2 side).

In this configuration, the reflector driving device 101 urges the reflector holding member 4 toward the first support member 5 side, and urges the first support member 5 toward the second support member 6 side, thereby Backlash between the body holding member 4 and the first support member 5 and backlash between the first support member 5 and the second support member 6 can be suppressed. As a result, the reflector driving device 101 can swing the reflector 1 more stably.

In the example shown in FIG. 3, the first direction in which the first biasing member biases the reflector holding member 4 and the second direction in which the second biasing member biases the first support member 5 are shown. is the same as The first direction and the second direction are perpendicular to the respective axial directions of the swing axis SA1 and the swing axis SA2. That is, the biasing member 9 functioning as a first biasing member biases the reflector holding member 4 rearward in the direction parallel to the X axis, and the biasing member 9 functioning as a second biasing member It urges the first support member 5 rearward in a direction parallel to the axis. This configuration can more reliably suppress rattling between the reflector holding member 4 and the first supporting member 5 . Moreover, this configuration can improve the assembling efficiency of the reflector driving device 101 .

The first biasing member and the second biasing member may be composed of the same spring member provided between the reflector holding member 4 and the second supporting member 6 . That is, the biasing member 9 as a spring member may serve as both the first biasing member and the second biasing member. In other words, the first biasing member may be configured to function also as the second biasing member. This configuration can reduce the number of parts of the reflector driving device 101 compared to the case where the first biasing member and the second biasing member are realized by separate spring members.

As shown in FIG. 5, the biasing member 9 as a spring member is composed of a plate spring, and includes an inner fixing portion 9M as a first fixing portion fixed to the reflector holding member 4 and It may have an outer fixing portion 9F as a second fixing portion to be fixed, and an elastic arm portion 9G connecting the inner fixing portion 9M and the outer fixing portion 9F. In this case, in the initial state in which neither the first drive mechanism MD1 nor the second drive mechanism MD2 is driven, the inner fixed portion 9M and the outer fixed portion 9F are substantially parallel. Specifically, as shown in FIG. 11, in the initial state, the inner fixing portion 9M and the outer fixing portion 9F are arranged with a gap DT1 in the X-axis direction, and are substantially spaced apart from each other in the Z-axis direction. arranged in parallel. This configuration can facilitate attachment of the biasing member 9 to the movable-side member MB.

As shown in FIG. 5, the biasing member 9 as a spring member may include a left spring member 9L as a first spring member and a right spring member 9R as a second spring member that are spaced apart from each other. good. In this case, each of the left spring member 9L and the right spring member 9R has two elastic arm portions 9G that connect the inner fixing portion 9M and the outer fixing portion 9F. Specifically, the left spring member 9L has two left elastic arm portions 9GL that connect the left inner fixing portion 9ML and the left outer fixing portion 9FL. Also, the right spring member 9R has two right elastic arm portions 9GR that connect the right inner fixed portion 9MR and the right outer fixed portion 9FR. When viewed from the front, the swing axis SA1 is located between the two left elastic arm portions 9GL (upper left elastic arm portion 9GUL and left lower elastic arm portion 9GDL) of the left spring member 9L, It is positioned between two right elastic arms 9GR (upper right elastic arm 9GUR and lower right elastic arm 9GDR). In the example shown in FIG. 5, each of the left spring member 9L and the right spring member 9R is vertically symmetrical with respect to the swing axis SA1 when viewed from the front. In addition, in the example shown in FIG. 5, the left spring member 9L and the right spring member 9R are symmetrical with respect to the swing axis SA2 when viewed from the front. In this configuration, when the swing axis SA1 is not positioned between the two left elastic arm portions 9GL of the left spring member 9L, or when the swing shaft SA1 is positioned between the two right elastic arm portions 9GR of the right spring member 9R, The biasing member 9 can bias the reflector holding member 4 toward the swing axis SA1 in a more balanced manner than when it is not positioned between them. Therefore, the reflector driving device 101 can swing the reflector 1 more stably.

As shown in FIGS. 4A and 7A to 7C, the reflector driving device 101 includes a first shaft portion CN1 that connects the reflector holding member 4 so as to be capable of swinging around a swing axis SA1, a first support member and a second shaft portion CN2 that connects 5 so as to be able to swing about a swing axis SA2. In this case, in the direction (direction parallel to the X-axis) in which the biasing member 9 as the first biasing member biases the reflector holding member 4, the position of the first shaft portion CN1 and the position of the second shaft portion CN2 is different from In the examples shown in FIGS. 4A and 7A to 7C, the position of the first shaft portion CN1 in the direction parallel to the X-axis is located forward (X1 side) of the position of the second shaft portion CN2. This configuration can reliably prevent the rocking of the reflector holding member 4 about the rocking axis SA1 and the rocking of the first support member 5 about the rocking axis SA2 from interfering with each other. To ensure that each of the oscillations is realized.

Specifically, the first shaft portion CN1 is composed of a portion integrally formed with the reflector holding member 4 and a portion integrally formed with the first support member 5, and/or the second shaft portion CN1. The shaft portion CN2 may be composed of a portion integrally formed with the first support member 5 and a portion integrally formed with the second support member 6 . In the example shown in FIGS. 4A and 7A to 7C, the first shaft portion CN1 includes a convex portion 4T integrally formed in the reflector holding member 4 and a concave portion 5S integrally formed in the first support member 5. and the second shaft portion CN2 is composed of a convex portion 5V formed integrally with the first support member 5 and a concave portion 6S formed integrally with the second support member 6. . This configuration can reduce the manufacturing cost of the shaft portion compared to the case where the shaft portion is configured using balls.

Alternatively, the first shank CN1 comprises a first ball arranged between the reflector holding member 4 and the first support member 5, and/or the second shank CN2 comprises the first support member. It may comprise a second ball arranged between the member 5 and the second support member 6 . This configuration can reduce the frictional force acting on the shaft portion when swinging the movable member MB with respect to the fixed member FB, compared to the configuration in which the convex portion and the concave portion are brought into contact with each other.

At least one of the first ball and the second ball may be coated with lubrication, or may be coated with grease.

As shown in FIGS. 3 and 7A to 7C, the first drive mechanism MD1 includes a magnetic field generating member 7 that moves together with the reflector holding member 4 and coils 8 (a left coil 8L and a right coil 8R) facing the magnetic field generating member 7. and may include As shown in FIGS. 3 and 7A to 7C, the second drive mechanism MD2 includes the magnetic field generating member 7 that moves together with the reflector holding member 4 and the coils 8 (the left coil 8L and the right coil) facing the magnetic field generating member 7. 8R). Alternatively, as shown in FIGS. 12 and 13, the second drive mechanism MD2 includes magnetic field generating members 7 (left magnet 7L and right magnet 7R) that move together with the first support member 5 and coils 8 ( a left coil 8L and a right coil 8R). In this case, the coils 8 (the left coil 8L and the right coil 8R) and the second support member 6 are arranged so as not to move relative to each other. In the example shown in FIGS. 3 and 7A to 7C, the magnetic field generating member 7 is fixed to the reflector holding member 4 with an adhesive, but is fixed to another member that moves together with the reflector holding member 4. may be This configuration can realize facilitation of power supply to the coil 8 . This is because there is no need to provide the coil 8 on the movable side member MB configured to be able to swing with respect to the second support member 6 .

In the above-described embodiment, the wiring board 3 provided with the coils 8 (the left coil 8L and the right coil 8R) is fixed to the second support member 6. In the example shown in FIGS. 4A and 4B, the wiring board 3 is composed of one wiring board (the wiring board 3 provided with the left coil 8L and the right coil 8R). This configuration can reliably prevent the force of the flexible wiring board from acting on the movable-side member MB, particularly when the wiring board 3 is formed of a flexible wiring board. The force by the flexible wiring board is, for example, a restoring force generated by the flexible wiring board in a curved state.

The wiring board 3 may be composed of a plurality of wiring boards. For example, as shown in FIG. 12, the wiring board 3 includes three wiring boards (a central wiring board 3C provided with a central coil 8C, a left wiring board 3L provided with a left coil 8L, and a right coil 8R). may be configured by the right wiring board 3R).

As shown in FIG. 12, the magnetic field generating member 7 includes a central magnet 7C attached to the bottom of the reflector holding member 4, a left magnet 7L attached to the left wall of the first support member 5, and a first support member. A right magnet 7R attached to the right wall of the member 5 may also be included. In this case, the left magnet 7L and the right magnet 7R may be arranged so as to face each other across a plane that is perpendicular to the swing axis SA1 and includes the swing axis SA2. The coils 8 include a central coil 8C provided corresponding to the central magnet 7C, a left coil 8L provided corresponding to the left magnet 7L, and a right coil 8R provided corresponding to the right magnet 7R. , may be included.

As shown in FIG. 2, the swing axis SA1 is a plane (XZ plane ), and the swing axis SA2 is parallel to the optical axis of the incident light.

The preferred embodiment of the present invention has been described in detail above. However, the invention is not limited to the embodiments described above. Various modifications and replacements may be applied to the above-described embodiments without departing from the scope of the present invention. Also, each of the features described with reference to the above-described embodiments may be combined as appropriate as long as they are not technically inconsistent.

For example, in the above-described embodiment, the first shaft portion CN1 is composed of the convex portion 4T formed in the reflector holding member 4 and the concave portion 5S formed in the first support member 5. However, the first shaft portion CN<b>1 may be composed of a concave portion formed in the reflector holding member 4 and a convex portion formed in the first supporting member 5 .

Similarly, the second shaft portion CN2 is composed of a convex portion 5V formed in the first support member 5 and a concave portion 6S formed in the second support member 6. However, the second shaft portion CN2 may be composed of a concave portion formed in the first support member 5 and a convex portion formed in the second support member 6. As shown in FIG.

At least one of the concave portion and the convex portion may be coated with a lubricating coating, or may be coated with grease.

In addition, in the above-described embodiment, the convex portion 4T formed on the reflector holding member 4 is configured so that the tip thereof is a semi-cylindrical shape. However, the convex portion 4T may be configured so that the tip thereof is a semi-hemispherical shape. In this case, the concave portion corresponding to the convex portion whose tip is a semi-hemisphere may be configured to have two inclined planes (to form a V-shaped groove). Further, the projection 5V formed on the first support member 5 is configured to have a hemispherical tip. However, the convex portion 5V may be configured so that the tip has a partial cylindrical shape. In this case, the concave portion corresponding to the convex portion having the partial cylindrical shape may be configured to have a concave surface of the partial cylindrical shape.

At least between the reflector holding member 4 and the first supporting member 5, between the first supporting member 5 and the second supporting member 6, and between the reflector holding member 4 and the second supporting member 6 One may be provided with one or more damping materials. The damping material is, for example, a gel-like damper material formed by curing a fluid adhesive with ultraviolet light or heat. However, the damping material may be made of other materials such as thermosetting resin, UV-curable resin, thermosetting silicone rubber, or UV-curable silicone rubber.

For example, the damping material may be provided between the outer surface of the side wall of the reflector holding member 4 and the inner surface of the side wall of the first support member 5 . Alternatively, in the example shown in FIG. 12, the damping material is provided between the left magnet 7L attached to the first support member 5 and the inner surface of the left wall portion of the second support member 6, and It may be provided between the right magnet 7</b>R attached to the support member 5 and the inner surface of the right wall portion of the second support member 6 . Alternatively, the damping material may be provided between the outer surface of the side wall of the reflector holding member 4 and the inner surface of the side wall of the second support member 6 .

This application claims priority based on Japanese Patent Application No. 2021-027897 filed on February 24, 2021, and the entire contents of this Japanese Patent Application are incorporated herein by reference.

1...Reflector 2...Cover member 3...Wiring board 3C...Center wiring board 3L...Left side wiring board 3R...Right side wiring board 4...Reflector holding member 4AL, 4AR ... Projecting part 4P... Base part 4PL... Left base part 4PR... Right base part 4S... Recess part 4SL... Left recess part 4SR... Right recess part 4T... Protrusion part 4TL ... Left convex part 4TR... Right convex part 5... First support member 5E... Concave part 5EL... Left concave part 5ER... Right concave part 5S... Concave part 5SL... Left concave part 5SR ...Right recessed part 5V...Protrusive part 5VD...Lower protruding part 5VU...Upper protruding part 5W...Recessed part 5WD...Lower recessed part 5WU...Upper recessed part 6...Second Supporting member 6ADL... Lower left projecting part 6AUL... Upper left projecting part 6ADR... Lower right projecting part 6AUR... Upper right projecting part 6HC... Center penetration part 6HL... Left through part 6HR... Right through part 6P... Base part 6PL... Left base part 6PR... Right base part 6S... Recessed part 7... Magnetic field generating member 7C... Central magnet 7L/ · Left side magnet 7R · · Right magnet · 8 · · · Coil · 8C · · · Center coil · · · · Left coil · · · · Right coil · 9 · · Biasing member · 9F · · Outer fixing part · 9FL · · ·・Left outer fixing part 9FR...Right outer fixing part 9G...Elastic arm part 9GL...Left elastic arm part 9GDL...Left lower elastic arm part 9GUL...Left upper elastic arm part 9GR...Right elastic Arm part 9GDR... Lower right elastic arm part 9GUR... Upper right elastic arm part 9L... Left spring member 9M... Inner fixed part 9ML... Left inner fixed part 9MR... Right inner fixed part 9R ...Right side spring member 10...Sensor 10C...Center sensor 10L...Left side sensor 10R...

Right side sensor

101, 101A, 101B...Reflector driving device B1...First ball B1L...・・Left ball B1R・・・Right ball B2・・・Second ball B2D・・・Lower ball B2U・・・Upper ball CN1・・・First shaft CN1L・・・Left shaft CN1R・・・Right Axle part　CN2・・・Second axis part　CN2D...Lower side part　CN2U...Upper side part　FB...Fixed side member　IS...Image pickup element　LT...Light LU...Lens unitMB・・・Movable side member MD・・・Driving Drive mechanism MD1... First drive mechanism MD2... Second drive mechanism SA1, SA2... Swing shaft

Claims

a reflector holding member capable of holding a reflector that bends light;
a first supporting member that supports the reflector holding member so as to be swingable around a first axis;
a second support member that supports the first support member so as to be swingable about a second shaft having an axial direction perpendicular to the axial direction of the first shaft;
a first drive mechanism for swinging the reflector holding member around the first axis;
A reflector driving device comprising: a second driving mechanism for swinging the first supporting member about the second axis,
The first drive mechanism includes a magnetic field generating member and a coil facing the magnetic field generating member,
the magnetic field generating member and the reflector holding member are arranged so as not to move relative to each other;
A reflector driving device, wherein the coil and the second support member are arranged so as not to move relative to each other.
The coil is provided on a wiring board,
The wiring board is fixed to the second support member,
The reflector driving device according to claim 1.
the magnetic field generating member extends along the first axis;
The coils have coil axes extending in an axial direction perpendicular to the axial direction of the first axis, and are arranged to face each other across a plane that is orthogonal to the first axis and includes the second axis. including a first coil and a second coil;
The first coil is arranged to face the first portion of the magnetic field generating member,
The second coil is arranged to face the second portion of the magnetic field generating member,
The reflector driving device according to claim 1 or 2.
The first coil and the second coil are configured to be individually energizable,
The magnetic field generating member, the first coil, and the second coil constitute the second drive mechanism,
4. The reflector driving device according to claim 3.
The magnetic field generating member is configured such that different magnetic poles are arranged along directions perpendicular to the respective axial directions of the first axis and the second axis,
In an initial state in which the coil is not energized, each of the first coil and the second coil has a first region facing one magnetic pole of the magnetic field generating member and a second region facing the other magnetic pole. have
5. The reflector driving device according to claim 4.
The magnetic field generating member is composed of one or two dipole magnets or one quadrupole magnet,
The reflector driving device according to claim 5.
having a sensor that detects a magnetic field from the magnetic field generating member;
The sensors include a first sensor arranged to face one end in the longitudinal direction of the magnetic field generating member, and a second sensor arranged to face the other end in the longitudinal direction of the magnetic field generating member. include,
The reflector driving device according to any one of claims 3 to 6.
the first axis is orthogonal to a plane including an optical axis of incident light incident on the reflector and an optical axis of reflected light reflected by the reflector;
the second axis is parallel to the optical axis of the incident light;
The reflector driving device according to any one of claims 1 to 7.