JP2024050138A - Lens holder drive unit - Google Patents

Abstract

[Problem] To reduce the height dimension of a lens holder driving device. [Solution] The device comprises a fixed member FB having a bottom plate portion BP, a lens holder 3 capable of holding a lens body LS, a guide mechanism GM that guides the lens holder 3 along the bottom plate portion BP so that the lens holder 3 can move in the optical axis direction (X-axis direction), and a driving unit DM that moves the lens holder 3 in the optical axis direction (X-axis direction). The lens holder 3 is open at the top and has a bottom portion BT that faces the bottom plate portion BP. At least the bottom portion BT in the portion where the lens body LS is disposed is formed of a movable metal plate portion 32. [Selected Figure] Figure 3

Description

This disclosure relates to a lens holder drive device.

Conventionally, a lens holder driving device is known that fixes a lens barrel (lens body) to a lens carrier (lens holder) and adjusts the focus by moving the lens holder in the optical axis direction of the lens body (see Patent Document 1).

JP 2019-091096 A

However, the lens holder described above has a substantially U-shaped cross section, and the side wall and bottom wall are configured to have substantially the same thickness, so the bottom wall cannot be made thin. This means that the height dimension of the lens holder drive device may become large.

Therefore, it is desirable to reduce the height dimension of the lens holder drive device.

A lens holder driving device according to one embodiment of the present invention includes a fixed member having a bottom plate portion, a lens holder capable of holding a lens body, a guide mechanism for guiding the lens holder so as to be movable in the optical axis direction along the bottom plate portion, and a drive unit for moving the lens holder in the optical axis direction, in which the lens holder is open at the top and has a bottom portion facing the bottom plate portion, and the bottom portion at least in the portion where the lens body is disposed is formed of a movable metal plate portion.

The above-mentioned lens holder driving device can reduce the height dimension.

FIG. 2 is an exploded perspective view of the lens holder driving device. FIG. 2 is a schematic diagram of a camera module. FIG. FIG. FIG. FIG. FIG. 2 is a top view of the lens holder, the coil assembly, the drive magnet, and the shaft. FIG. 2 is a cross-sectional view of the lens holder driving device. FIG. 4 is a top view of the magnet holder and the coil holder. FIG. 2 is a cross-sectional view of a coil holder in which a magnet holder is disposed. FIG. 2 is a top view of the magnet holder and lens retention assembly. FIG. 2 is an exploded perspective view of a lens holding assembly. FIG. 2 is a perspective view of a lens holding assembly. FIG. 2 is a front view of the components of the lens holder assembly. FIG. FIG. 4 is a top view of a portion of the coil holder. FIG. 2 is a perspective view of a lens retention assembly with adhesive applied. FIG. 2 is a perspective view of a printed wiring board attached to a base member. 2A and 2B are a top view and a front view of a printed wiring board. FIG. 2 is a perspective view of a portion of a printed wiring board attached to a base member. 4 is a block diagram showing an example of the configuration of a control system that controls the lens holder driving device. FIG.

A lens holder driving device 100 according to an embodiment of the present disclosure will now be described with reference to the drawings. FIG. 1 is an exploded perspective view of the lens holder driving device 100, showing a state in which the cover member 1 is separated from the lower member LM. FIG. 2 is a schematic diagram of a camera module CM in a camera-equipped mobile device equipped with the lens holder driving device 100. As shown in FIGS. 1 and 2, the lens holder driving device 100 is configured to be able to move the lens body LS along the optical axis OA of the lens body LS.

1, X1 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 constituting 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 constituting the three-dimensional orthogonal coordinate system, and Z2 represents the other direction of the Z axis. In this embodiment, the X1 side of the lens holder driving device 100 corresponds to the front side (front side) of the lens holder driving device 100, and the X2 side of the lens holder driving device 100 corresponds to the rear side (rear side) of the lens holder driving device 100. The Y1 side of the lens holder driving device 100 corresponds to the left side of the lens holder driving device 100, and the Y2 side of the lens holder driving device 100 corresponds to the right side of the lens holder driving device 100. Additionally, the Z1 side of the lens holder driving device 100 corresponds to the upper side of the lens holder driving device 100, and the Z2 side of the lens holder driving device 100 corresponds to the lower side of the lens holder driving device 100. Additionally, in this embodiment, the optical axis OA extends parallel to the X axis. This is the same in the other figures.

As shown in FIG. 1, the lens holder driving device 100 includes a cover member 1 and a lower member LM as part of a fixed member FB. The cover member 1 is configured to cover the upper and side surfaces of the lower member LM. In this embodiment, the cover member 1 is made of a non-magnetic material such as austenitic stainless steel. Because it is made of a non-magnetic material, the cover member 1 does not have a negative magnetic effect on the driving unit that utilizes electromagnetic force.

The cover member 1 has a bottomless box-like shape. The cover member 1 has an outer plate portion 1A including four side plate portions (first side plate portion 1A1 to fourth side plate portion 1A4) and a generally rectangular and flat upper surface portion 1B provided so as to be continuous with the upper end (the end on the Z1 side) of the outer plate portion 1A. The first side plate portion 1A1 has an opening for receiving light LT from the subject reflected by the mirror MR (see FIG. 2). Similarly, the third side plate portion 1A3 has an opening for allowing the light LT to reach the image sensor IS (see FIG. 2). The cover member 1 is joined to a base member BM by adhesive or the like to form a housing HS together with the base member BM. The base member BM includes a base plate 2 and a coil holder 5.

The lens body LS is an example of an optical member and is configured to have one or more lenses. In this embodiment, the lens body LS includes a substantially T-shaped lens barrel with a partially cylindrical tubular portion formed in the center and at least one lens, and is configured so that the central axis of the lens barrel (tubular portion) is aligned with the optical axis OA. In the illustrated example, the lens body LS includes a first lens body LS1 and a second lens body LS2.

The lens holder driving device 100 is configured to be able to move the lens body LS along the optical axis direction by a driving unit DM housed in a housing HS. The "optical axis direction" includes the direction of the optical axis OA of the lens body LS and a direction parallel to the optical axis OA. Specifically, the lens holder driving device 100 can move the first lens body LS1 along the optical axis direction as indicated by the double-headed arrow AR1, and can move the second lens body LS2 along the optical axis direction as indicated by the double-headed arrow AR2. In other words, the lens holder driving device 100 can move each of the first lens body LS1 and the second lens body LS2 separately along the optical axis direction.

The lens holder driving device 100 is used in a camera module CM, such as a periscope-type camera module, as shown in FIG. 2, for example. In the example shown in FIG. 2, the camera module CM mainly includes a mirror MR, a lens body LS, the lens holder driving device 100, and an image sensor IS. The mirror MR as a reflector may be a prism. In this embodiment, the mirror MR is configured to provide a flat reflecting surface.

The lens holder driving device 100 is typically positioned farther from the subject than the mirror MR, as shown in FIG. 2. In other words, the lens holder driving device 100 is positioned so that the light LT from the subject reflected by the mirror MR reaches the image sensor IS through the lens body LS.

Next, the lens holder driving device 100 will be described with reference to FIG. 3. FIG. 3 is an exploded perspective view of the lower member LM, showing the movable member MB separated from the fixed member FB.

As shown in FIG. 3, the lower member LM includes a lens holder 3, a magnet 6, and a magnet holder 7 as the movable member MB, and a base plate 2, a coil assembly 4, a coil holder 5, a shaft 8, a printed wiring board 9, a magnetic member 10, a first cushioning material 11, a magnetic sensor 18, and a lens holding assembly LH as the fixed member FB.

The base plate 2 is a member that constitutes a part (bottom) of the housing HS. In this embodiment, the base plate 2 is formed of a non-magnetic material such as austenitic stainless steel, like the cover member 1. In the illustrated example, the base plate 2 has a fixed side metal plate part 2B that constitutes a part of the bottom plate part BP of the fixed side member FB, and five standing parts 2W that extend upward from the end of the fixed side metal plate part 2B. The five standing parts 2W are embedded in the coil holder 5 by insert molding. The fixed side metal plate part 2B does not have to be a completely flat plate. In this embodiment, the fixed side metal plate part 2B has three convex parts that extend in the optical axis direction as shown in FIG. 3, and is formed in a substantially flat shape as a whole. These three convex parts protrude slightly upward from the reference surface (upper surface) of the fixed side metal plate part 2B, increasing the rigidity of the fixed side metal plate part 2B.

The lens holder 3 is configured to hold the lens body LS. In this embodiment, the lens holder 3 is formed by embedding a metal plate in a synthetic resin such as liquid crystal polymer (LCP) by insert molding. The lens holder 3 includes a first lens holder 3F configured to hold the first lens body LS1, and a second lens holder 3B configured to hold the second lens body LS2.

The coil holder 5 is configured to movably support the movable member MB and immovably support the coil assembly 4. In this embodiment, the coil holder 5 is formed by injection molding a synthetic resin such as liquid crystal polymer (LCP). The coil holder 5 and the base plate 2 form the base member BM. In the illustrated example, a portion of the base plate 2 is embedded in the coil holder 5 by insert molding. However, the base plate 2 may be fixed to the coil holder 5 by an adhesive. In other words, the base plate 2 does not have to be embedded in the coil holder 5.

In the illustrated example, the coil holder 5 has an outer wall portion 5A including four side walls (first side wall portion 5A1 to fourth side wall portion 5A4) and a bottom wall portion 5B having a substantially rectangular frame shape that is continuous with the lower end (the end on the Z2 side) of the outer wall portion 5A. The bottom wall portion 5B may be separated into two portions, for example. The first side wall portion 5A1 has an opening for receiving light LT from the subject reflected by the mirror MR. Similarly, the third side wall portion 5A3 has an opening for allowing the light LT to reach the image sensor IS. The coil holder 5 also has a cutout portion CU for receiving the coil assembly 4. The cutout portion CU includes a left cutout portion CUL formed in the second side wall portion 5A2 and a right cutout portion CUR formed in the fourth side wall portion 5A4.

The fixed member FB is configured to form a storage section SP that stores the movable member MB. The storage section SP is a space that is partitioned by a top plate section TP (see FIG. 1), a side wall section SW, and a bottom plate section BP. In the illustrated example, the top plate section TP is formed by the upper surface section 1B of the cover member 1, the side wall section SW is formed by the outer wall section 5A of the coil holder 5, and the bottom plate section BP is formed by the fixed metal plate section 2B of the base plate 2 and the bottom wall section 5B of the coil holder 5.

The coil assembly 4 is configured to hold the coil set 42 that constitutes the drive unit DM. In this embodiment, the coil assembly 4 includes a substrate 41 and a coil set 42. In the illustrated example, the substrate 41 is formed of a flexible printed wiring board and is fixed to the coil holder 5 by adhesive. Note that in FIG. 3, for the sake of clarity, the detailed winding state of the conductive wire material whose surface is coated with an insulating material is omitted for the coil. The same applies to the other figures.

The coil assembly 4 includes a left coil assembly 4L that fits into the left cutout CUL of the coil holder 5, and a right coil assembly 4R that fits into the right cutout CUR of the coil holder 5. The left coil assembly 4L includes a left board 41L and a left coil set 42L (first left coil 42L1 and second left coil 42L2). The right coil assembly 4R includes a right board 41R and a right coil set 42R (first right coil 42R1 and second right coil 42R2).

The coil set 42 is a member that constitutes an electromagnet serving as the driving unit DM, and is attached to the substrate 41. In this embodiment, the coils that constitute the coil set 42 are wound type coils. Specifically, the left coil set 42L is attached to the left substrate 41L of the left coil assembly 4L, and the right coil set 42R is attached to the right substrate 41R of the right coil assembly 4R.

In the illustrated example, the left coil set 42L includes a first left coil 42L1 and a second left coil 42L2. The first left coil 42L1 and the second left coil 42L2 are configured so that the direction of current flow can be controlled separately. Similarly, the right coil set 42R includes a first right coil 42R1 and a second right coil 42R2. The first right coil 42R1 and the second right coil 42R2 are configured so that the direction of current flow can be controlled separately.

The magnet 6 is a member that constitutes the drive unit DM and is also referred to as a "drive magnet." The drive unit DM is configured to move the movable member MB along the optical axis direction by utilizing the magnetic force (attraction or repulsion) acting between the coil set 42 that functions as an electromagnet and the magnet 6 that serves as a drive magnet. In this embodiment, the magnet 6 includes a left magnet 6L that moves with the first lens holder 3F and a right magnet 6R that moves with the second lens holder 3B. The left magnet 6L includes a first left magnet 6L1, a second left magnet 6L2, and a third left magnet 6L3, and the right magnet 6R includes a first right magnet 6R1, a second right magnet 6R2, and a third right magnet 6R3.

In the illustrated example, the first left magnet 6L1, the second left magnet 6L2, the third left magnet 6L3, the first right magnet 6R1, the second right magnet 6R2, and the third right magnet 6R3 are each permanent magnets magnetized with two poles. The inside (the side closer to the optical axis OA) of the first left magnet 6L1, the third left magnet 6L3, the first right magnet 6R1, and the third right magnet 6R3 is magnetized with an S pole, and the outside is magnetized with an N pole. The inside of the second left magnet 6L2 and the second right magnet 6R2 are magnetized with an N pole, and the outside is magnetized with an S pole. In FIG. 3, for clarity, a coarse cross pattern is applied to the N pole part of the magnet 6, and a fine cross pattern is applied to the S pole part of the magnet 6. This is the same in the other figures.

The magnet holder 7 is a component of the drive unit DM and is configured to hold the magnet 6. In this embodiment, the magnet holder 7 is formed of a magnetic material such as a magnetic metal, and is configured to function as a yoke that efficiently applies the magnetic force of the magnet 6 to the coil. The magnet holder 7 includes a first magnet holder 7F that is adhesively fixed to the first lens holder 3F, and a second magnet holder 7B that is adhesively fixed to the second lens holder 3B.

The left magnet 6L is fixed to the first magnet holder 7F with adhesive, and the right magnet 6R is fixed to the second magnet holder 7B with adhesive. The left magnet 6L fixed to the first magnet holder 7F is positioned so as to face the left coil set 42L provided in the left coil assembly 4L in a direction perpendicular to the optical axis OA (Y-axis direction) and to be spaced apart from the left coil set 42L. Similarly, the right magnet 6R fixed to the second magnet holder 7B is positioned so as to face the right coil set 42R provided in the right coil assembly 4R in a direction perpendicular to the optical axis OA (Y-axis direction) and to be spaced apart from the right coil set 42R.

The shaft 8 is a member that constitutes the guide mechanism GM. The guide mechanism GM is a mechanism for guiding the bottom part BT of the lens holder 3 along the bottom plate part BP (reference surface) so that it can move in the optical axis direction (X-axis direction). In the illustrated example, the shaft 8 is inserted into a through hole 5H formed in the coil holder 5 and fixed to the coil holder 5 by adhesive. Specifically, the shaft 8 includes a left shaft 8L that is inserted and fixed through the first left through hole 5HL1 and the second left through hole 5HL2, and a right shaft 8R that is inserted and fixed through the first right through hole 5HR1 and the second right through hole 5HR2. The left shaft 8L and the right shaft 8R extend in the optical axis direction and are arranged so as to be parallel to each other.

The printed wiring board 9 is a member that is electrically connected to components such as the coil and magnetic sensor that constitute the lens holder driving device 100. In the illustrated example, the printed wiring board 9 is formed of a flexible printed wiring board and is fixed to the base plate 2 with an adhesive. The printed wiring board 9 includes a copper conductor pattern for supplying power to the magnetic sensor 18, the coil set 42 included in the coil assembly 4, and the coil 52 that constitutes the electromagnetic mechanism EM (see FIG. 12) included in the lens holding assembly LH.

The magnetic sensor 18 is an example of a magnetic detection member. In this embodiment, the magnetic sensor 18 is configured to detect the magnetic field generated by the magnetic field generating member 15 (see FIG. 5) attached to the movable side member MB. The magnetic sensor 18 is configured to be a giant magneto resistive effect (GMR) element, and is configured to measure a voltage value that changes depending on the magnitude of the magnetic field generated by the magnetic field generating member 15 that the magnetic sensor 18 receives, and output the measured voltage value to the control device CTR (see FIG. 21). The control device CTR is configured to detect the position of the lens holder 3 to which the magnetic field generating member 15 is attached based on the output of the magnetic sensor 18. The magnetic sensor 18 is configured to output a larger voltage value as the N pole portion approaches, and a smaller voltage value as the S pole portion approaches. However, the magnetic sensor 18 may be configured to output a smaller voltage value as the N pole portion approaches, and a larger voltage value as the S pole portion approaches. The magnetic sensor 18 may be configured to detect the position of the lens holder 3 using other magnetic resistance elements such as a Semiconductor Magneto Resistive (SMR) element, an Anisotropic Magneto Resistive (AMR) element, or a Tunnel Magneto Resistive (TMR) element, or may be configured to detect the position of the lens holder 3 using a Hall element. In the illustrated example, the magnetic sensor 18 includes a left magnetic sensor 18L that detects the movement of the first lens holder 3F and a right magnetic sensor 18R that detects the movement of the second lens holder 3B. Both the left magnetic sensor 18L and the right magnetic sensor 18R are attached to the third portion 93 of the printed wiring board 9.

The magnetic member 10 is a member for suppressing rattling of the movable member MB by attracting the magnets included in the movable member MB. In the illustrated example, the magnetic attraction force acting between the magnets included in the movable member MB and the magnetic member 10 is greater than the force caused by the weight of the movable member MB. Therefore, the magnetic member 10 can attract the movable member MB regardless of the posture of the movable member MB. In the illustrated example, the magnetic member 10 is a long and thin plate-like member, and includes a left outer magnetic member 10LE and a right outer magnetic member 10RE that are adhesively fixed to the upper surface of the bottom wall portion 5B of the coil holder 5, and a left inner magnetic member 10LI and a right inner magnetic member 10RI that are adhesively fixed to the upper surface of the fixed side metal plate portion 2B of the base plate 2.

Specifically, as shown in FIG. 4, the magnetic member 10 is arranged so as to be spaced apart from the magnet included in the movable member MB in the Z-axis direction. FIG. 4 is a perspective view of a magnetic attraction mechanism composed of the magnetic member 10 and the magnet included in the movable member MB, and shows the positional relationship between the magnetic member 10 and the magnets included in the movable member MB (magnet 6, magnetic field generating member 15, and magnet 17). Note that in FIG. 4, for clarity, members other than magnet 6, magnetic member 10, magnetic field generating member 15, magnet 17, and magnetic sensor 18 are omitted from the illustration. Also, in FIG. 4, a coarse cross pattern is applied to the north pole portion of the magnet included in the movable member MB, and a fine cross pattern is applied to the south pole portion of the magnet included in the movable member MB.

More specifically, the left outer magnetic member 10LE is arranged to face the left magnet 6L in the Z-axis direction, and the right outer magnetic member 10RE is arranged to face the right magnet 6R in the Z-axis direction. The left inner magnetic member 10LI is arranged to face the rear magnet 17B in the Z-axis direction, and the right inner magnetic member 10RI is arranged to face the front magnet 17F in the Z-axis direction. The front magnet 17F is fixed to the first lens holder 3F, and the rear magnet 17B is fixed to the second lens holder 3B. This arrangement has the effect of preventing the movable member MB from floating up from the shaft 8.

The first cushioning material 11 is a member for absorbing and softening the impact when the fixed side member FB and the movable side member MB come into contact. In this embodiment, the first cushioning material 11 is made of rubber, sponge, or the like. In the illustrated example, the first cushioning material 11 is a member made of silicone rubber, and includes a left front cushioning material 11LF, a right front cushioning material 11RF, a left rear cushioning material 11LB, and a right rear cushioning material 11RB.

The left front cushioning material 11LF is adhesively fixed to the coil holder 5 so that it can absorb the impact when the coil holder 5 and the front end (end on the X1 side) of the first magnet holder 7F come into contact. The right front cushioning material 11RF is adhesively fixed to the coil holder 5 so that it can absorb the impact when the coil holder 5 and the front end (end on the X1 side) of the second magnet holder 7B come into contact. The left rear cushioning material 11LB is adhesively fixed to the coil holder 5 so that it can absorb the impact when the coil holder 5 and the rear end (end on the X2 side) of the first magnet holder 7F come into contact. The right rear cushioning material 11RB is adhesively fixed to the coil holder 5 so that it can absorb the impact when the coil holder 5 and the rear end (end on the X2 side) of the second magnet holder 7B come into contact.

The lens holding assembly LH is an example of a rotation drive unit, and is configured to hold the lens holder 3 at a predetermined position in the optical axis direction. In this embodiment, the lens holding assembly LH is configured to hold the lens holder 3 at a movement limit position, which is an example of a position within the movable range in the optical axis direction. The movement limit position means the position of the lens holder 3 when the lens holder 3 moves to the end of the movable range of the lens holder 3. However, the lens holding assembly LH may hold the lens holder 3 near the movement limit position in the optical axis direction. In the illustrated example, the lens holding assembly LH is configured to hold the first lens holder 3F and the second lens holder 3B at the movement limit position on the front side (X1 side). In addition, the lens holding assembly LH is attached to the fourth part 94 of the printed wiring board 9 (see FIG. 19).

Next, the details of the movable side member MB will be described with reference to FIG. 5. FIG. 5 is an exploded perspective view of the movable side member MB. Specifically, the upper view of FIG. 5 is an exploded perspective view of the movable side member MB with the lens body LS removed, and the lower view of FIG. 5 is an exploded perspective view of the movable side member MB with the lens body LS removed.

As shown in FIG. 5, the movable side member MB includes a lens holder 3 that holds a lens body LS. Specifically, the lens holder 3 includes a first lens holder 3F that holds a first lens body LS1, and a second lens holder 3B that holds a second lens body LS2.

More specifically, the lens holder 3 includes a magnet holder 7, a pair of side wall portions 30, and a movable side metal plate portion 32. The pair of side wall portions 30 are fitted with the magnet holder 7, the second buffer material 12, the third buffer material 13, the first yoke 14, the magnetic field generating member 15, the second yoke 16, and the magnet 17.

In the illustrated example, the first lens holder 3F includes a first magnet holder 7F, a pair of front sidewalls 30F, and a front movable metal plate 32F. The pair of front sidewalls 30F includes a first front sidewall 30F1 and a second front sidewall 30F2. The first magnet holder 7F, the left front buffer material 12LF, the first front yoke 14F, and the front magnetic field generating member 15F are attached to the first front sidewall 30F1, and the right front buffer material 12RF, the front buffer material 13F, the second front yoke 16F, and the front magnet 17F are attached to the second front sidewall 30F2. The first magnet holder 7F has a first front protrusion 71F and a second front protrusion 72F that protrude inward (Y2 side). The first magnet holder 7F is fixed to the first front sidewall 30F1 by adhesive with the first front protrusion 71F and the second front protrusion 72F inserted into the corresponding recesses formed on the left side of the first front sidewall 30F1. Since a portion of the front movable metal plate 32F is exposed on the left side of the first front sidewall 30F1, at least a portion of the inner surface (right side) of the first magnet holder 7F is fixed to the front movable metal plate 32F by adhesive. In other words, the adhesion between the first magnet holder 7F and the first front sidewall 30F1 is partially achieved by adhesion between the metal members.

Similarly, the second lens holder 3B includes a second magnet holder 7B, a pair of rear sidewalls 30B, and a rear movable metal plate 32B. The pair of rear sidewalls 30B includes a first rear sidewall 30B1 and a second rear sidewall 30B2. The first rear sidewall 30B1 is provided with the second magnet holder 7B, the right rear buffer 12RB, the first rear yoke 14B, and the rear magnetic field generating member 15B, and the second rear sidewall 30B2 is provided with the left rear buffer 12LB, the rear buffer 13B, the second rear yoke 16B, and the rear magnet 17B. The second magnet holder 7B has a first rear protrusion 71B (see FIG. 9) and a second rear protrusion 72B (see FIG. 9) that protrude inward (Y1 side). The second magnet holder 7B is fixed to the first rear sidewall 30B1 by adhesive with the first rear protrusion 71B and the second rear protrusion 72B inserted into the corresponding recesses formed on the right side of the first rear sidewall 30B1. Since a portion of the rear movable metal plate 32B is exposed on the right side of the first rear sidewall 30B1, at least a portion of the inner surface (left side) of the second magnet holder 7B is fixed to the rear movable metal plate 32B by adhesive. The adhesion between the second magnet holder 7B and the first rear sidewall 30B1 is partially achieved by adhesion between metal members.

In addition, the sidewall portion 30 is formed with a through-hole TH through which the shaft 8 is inserted. Specifically, the first front sidewall portion 30F1 and the second rear sidewall portion 30B2 each have a left through-hole THL through which the left shaft 8L is inserted, and the first rear sidewall portion 30B1 and the second front sidewall portion 30F2 each have a right through-hole THR through which the right shaft 8R is inserted. More specifically, the first front sidewall portion 30F1 has a first left through-hole THL1 through which the left shaft 8L is inserted, the second rear sidewall portion 30B2 has a second left through-hole THL2 through which the left shaft 8L is inserted, the second front sidewall portion 30F2 has a first right through-hole THR1 through which the right shaft 8R is inserted, and the first rear sidewall portion 30B1 has a second right through-hole THR2 through which the right shaft 8R is inserted. The lens holder driving device 100 may be configured so that the shaft 8 passes through the lens body LS instead of the side wall portion 30, or the shaft 8 passes through both the side wall portion 30 and the lens body LS.

The second cushioning material 12 is a member for absorbing and softening the impact when the coil holder 5 and the side wall portion 30 come into contact. In this embodiment, the second cushioning material 12 is made of rubber, sponge, or the like. In the illustrated example, the second cushioning material 12 is a member made of silicone rubber, and includes a left front cushioning material 12LF, a right front cushioning material 12RF, a left rear cushioning material 12LB, and a right rear cushioning material 12RB.

The left front cushioning material 12LF is adhesively fixed to the front end of the first front sidewall portion 30F1 so as to absorb the impact when the coil holder 5 comes into contact with the front end (X1 end) of the first front sidewall portion 30F1. The right front cushioning material 12RF is adhesively fixed to the front end of the second front sidewall portion 30F2 so as to absorb the impact when the coil holder 5 comes into contact with the front end (X1 end) of the second front sidewall portion 30F2. The left rear cushioning material 12LB is adhesively fixed to the rear end of the second rear sidewall portion 30B2 so as to absorb the impact when the coil holder 5 comes into contact with the rear end (X2 end) of the second rear sidewall portion 30B2. The right rear cushioning material 12RB is adhesively fixed to the rear end of the first rear sidewall portion 30B1 so as to absorb the impact when the coil holder 5 comes into contact with the rear end (X2 end) of the first rear sidewall portion 30B1.

The third cushioning material 13 is a member for absorbing and softening the impact when the front side wall portion 30F and the rear side wall portion 30B come into contact with each other. In this embodiment, the third cushioning material 13 is made of rubber, sponge, or the like. In the illustrated example, the third cushioning material 13 is a member made of silicone rubber, and includes a front cushioning material 13F and a rear cushioning material 13B.

The front cushioning material 13F is adhesively fixed to the rear end of the second front sidewall portion 30F2 so as to absorb the impact when the rear end of the second front sidewall portion 30F2 and the front end of the first rear sidewall portion 30B1 come into contact. The rear cushioning material 13B is adhesively fixed to the front end of the second rear sidewall portion 30B2 so as to absorb the impact when the rear end of the first front sidewall portion 30F1 and the front end of the second rear sidewall portion 30B2 come into contact.

The magnetic field generating member 15 is a member configured to generate a magnetic field. In the illustrated example, the magnetic field generating member 15 is a permanent magnet magnetized with multiple poles along the X-axis direction as shown in FIG. 4, and includes a front magnetic field generating member 15F fixed to the first front sidewall portion 30F1 of the first lens holder 3F, and a rear magnetic field generating member 15B fixed to the first rear sidewall portion 30B1 of the second lens holder 3B. Specifically, the magnetic field generating member 15 is magnetized so that the north poles and south poles are alternately arranged in the X-axis direction as shown in FIG. 4.

The first yoke 14 is a member for increasing the magnetic force of the magnetic field generating member 15. In the illustrated example, the first yoke 14 includes a first front yoke 14F that is adhesively fixed to a recess formed in the bottom surface of the first front sidewall portion 30F1 to increase the magnetic force of the front magnetic field generating member 15F, and a first rear yoke 14B that is adhesively fixed to a recess formed in the bottom surface of the first rear sidewall portion 30B1 to increase the magnetic force of the rear magnetic field generating member 15B.

The magnet 17 is a member provided on the movable member MB so that a magnetic attraction force can be applied between the magnetic member 10 and the magnet 17. In the illustrated example, the magnet 17 is a permanent magnet magnetized with two poles along the Z-axis direction as shown in FIG. 4, and includes a front magnet 17F adhesively fixed to a recess formed in the bottom surface of the second front sidewall portion 30F2 of the first lens holder 3F, and a rear magnet 17B adhesively fixed to a recess formed in the bottom surface of the second rear sidewall portion 30B2 of the second lens holder 3B.

The second yoke 16 is a member for increasing the magnetic force of the magnet 17. In the illustrated example, the second yoke 16 includes a second front yoke 16F that is adhesively fixed to a recess formed in the bottom surface of the second front sidewall portion 30F2 to increase the magnetic force of the front magnet 17F, and a second rear yoke 16B that is adhesively fixed to a recess formed in the bottom surface of the second rear sidewall portion 30B2 to increase the magnetic force of the rear magnet 17B.

As shown in the upper diagram of FIG. 5, the lens holder 3 is open at the top and has a bottom portion BT that faces the bottom plate portion BP (see FIG. 3) of the fixed member FB. At least the bottom portion BT in the portion where the lens body LS is disposed is formed of a movable metal plate portion 32. The lens holder 3 also has a pair of side wall portions 30 that are spaced apart and opposed to each other in a direction (Y-axis direction) that intersects with the optical axis direction (X-axis direction). Each of the pair of side wall portions 30 is formed of a synthetic resin that is integrated with the movable metal plate portion 32.

As shown in FIG. 6, the movable metal plate portion 32 has a base portion BS that constitutes the bottom portion BT, and a folded portion FP that is folded from the base portion BS and embedded in the side wall portion 30.

Figure 6 is a diagram of the movable side metal plate portion 32 that constitutes the lens holder 3. Specifically, the upper diagram in Figure 6 is a top view of the front movable side metal plate portion 32F and the rear movable side metal plate portion 32B, the center diagram in Figure 6 is a front view of the rear movable side metal plate portion 32B, and the lower diagram in Figure 6 is a front view of the front movable side metal plate portion 32F.

Specifically, as shown in the lower diagram of FIG. 6, the front movable metal plate portion 32F has a base portion BS (front base portion BSF) that constitutes the bottom portion BT (front bottom portion BTF), and a folded portion FP (front folded portion FPF) that is folded from the base portion BS (front base portion BSF) and embedded in the side wall portion 30 (front side wall portion 30F). The front folded portion FPF includes a left front folded portion FPFL and a right front folded portion FPFR.

More specifically, the front movable metal plate portion 32F includes the first portion 32F1 to the ninth portion 32F9. The first portion 32F1 to the fourth portion 32F4 form the left front bent portion FPFL embedded in the first front sidewall portion 30F1, and the sixth portion 32F6 to the ninth portion 32F9 form the right front bent portion FPFR embedded in the second front sidewall portion 30F2.

The second portion 32F2, the third portion 32F3, and the ninth portion 32F9 are embedded in the front sidewall portion 30F so as to be partially exposed from the front sidewall portion 30F, and the exposed portions form an adhesive portion AD that is fixed to other members with an adhesive. Specifically, the adhesive portion AD of the second portion 32F2 is fixed to the first magnet holder 7F with an adhesive, and the adhesive portions AD of the third portion 32F3 and the ninth portion 32F9 are fixed to the first lens body LS1 with an adhesive BD4 (see FIG. 8).

Similarly, as shown in the center diagram of FIG. 6, the rear movable metal plate portion 32B has a base portion BS (rear base portion BSB) that constitutes the bottom portion BT (rear bottom portion BTB), and a bent portion FP (rear bent portion FPB) that is bent from the base portion BS (rear base portion BSB) and embedded in the side wall portion 30. The rear bent portion FPB includes a left rear bent portion FPBL and a right rear bent portion FPBR.

More specifically, the rear movable metal plate portion 32B includes the first portion 32B1 to the ninth portion 32B9. The first portion 32B1 to the fourth portion 32B4 form the right rear bent portion FPBR embedded in the first rear sidewall portion 30B1, and the sixth portion 32B6 to the ninth portion 32B9 form the left rear bent portion FPBL embedded in the second rear sidewall portion 30B2.

The second portion 32B2, the third portion 32B3, and the ninth portion 32B9 are embedded in the rear sidewall portion 30B so as to be partially exposed from the rear sidewall portion 30B, and the exposed portions form an adhesive portion AD that is fixed to other members with an adhesive. Specifically, the adhesive portion AD of the second portion 32B2 is fixed to the second magnet holder 7B with an adhesive, and the adhesive portions AD of the third portion 32B3 and the ninth portion 32B9 are fixed to the second lens body LS2 with an adhesive.

In the illustrated example, multiple recesses are formed on the surface of the adhesive portion AD, which is the portion exposed on the surface of the side wall portion 30. This is to increase the adhesive strength between the movable side metal plate portion 32 and the lens body LS and the magnet holder 7, respectively. Note that the multiple recesses may also be multiple protrusions.

Next, the driving unit DM will be described with reference to FIG. 7. FIG. 7 is a top view of the lens holder 3, the coil assembly 4, the magnet 6, and the shaft 8. Specifically, the upper view of FIG. 7 shows the state when the first lens holder 3F (first lens body LS1) and the second lens holder 3B (second lens body LS2) are both at the front movement limit position. The center view of FIG. 7 shows the state when the first lens holder 3F (first lens body LS1) is at the front movement limit position, and the second lens holder 3B (second lens body LS2) is at a position away from the front movement limit position to the rear. The lower view of FIG. 7 shows the state when the first lens holder 3F (first lens body LS1) is at the front movement limit position, and the second lens holder 3B (second lens body LS2) is at the rear movement limit position. Note that in FIG. 7, for clarity, members other than the lens holder 3, the coil assembly 4, the magnet 6, and the shaft 8 are omitted from the illustration.

The driving unit DM is configured to be able to move the lens holder 3 in the optical axis direction. In this embodiment, the driving unit DM is configured to be able to move the movable side member MB along the optical axis OA by utilizing the magnetic force (attraction or repulsion) acting between the coil set 42 functioning as an electromagnet and the magnet 6 serving as a driving magnet.

Specifically, the driving unit DM includes a first driving unit DM1 that moves the first lens holder 3F in the optical axis direction, and a second driving unit DM2 that moves the second lens holder 3B in the optical axis direction. The first driving unit DM1 is composed of a left coil set 42L attached to the left board 41L of the left coil assembly 4L, and a left magnet 6L attached to the first magnet holder 7F. The second driving unit DM2 is composed of a right coil set 42R attached to the right board 41R of the right coil assembly 4R, and a right magnet 6R attached to the second magnet holder 7B.

Next, an example of the relationship between the magnetic poles of the right-side magnet 6R and the magnetic poles of the electromagnet realized by the right-side coil set 42R when the second lens holder 3B, which is at the front movement limit position, is moved to the rear movement limit position will be described. Note that the following description with reference to FIG. 7 relates to the movement of the second lens holder 3B by the second drive unit DM2, but is similarly applied to the movement of the first lens holder 3F by the first drive unit DM1.

When the second lens holder 3B is in the front movement limit position, the right magnet 6R is in a position facing the first right coil 42R1 in the Y-axis direction, as shown in the upper diagram of FIG. 7. In the illustrated example, the central axis M1 at the center position in the optical axis direction (X-axis direction) of the right magnet 6R (second right magnet 6R2) does not coincide with the central axis L1 at the center position in the optical axis direction of the first right coil 42R1. If the central axis M1 and the central axis L1 coincide, when the first right coil 42R1 is excited, there is a risk that the right magnet 6R cannot be moved away by repulsive force (repulsive force). Note that the central axis M1 is a straight line parallel to the Y-axis that passes through the center point of the second right magnet 6R2, and the central axis L1 is a straight line parallel to the Y-axis that passes through the center point of the first right coil 42R1.

Similarly, when the first lens holder 3F is at the front movement limit position, the left magnet 6L is positioned opposite the first left coil 42L1 in the Y-axis direction, as shown in the upper diagram of Figure 7. The central axis M2, which is located at the center position in the optical axis direction (X-axis direction) of the left magnet 6L (second left magnet 6L2), does not coincide with the central axis L2, which is located at the center position in the optical axis direction of the first left coil 42L1.

After that, as shown in the center diagram of FIG. 7, when the first right coil 42R1 is excited so that the side of the first right coil 42R1 facing the right magnet 6R (Y1 side) becomes the S pole, the first right coil 6R1 is attracted to the first right coil 42R1 and moves to the X2 side along the optical axis direction. This is because magnetic forces act so that the second right magnet 6R2 and the first right coil 42R1 repel each other and the first right coil 6R1 and the first right coil 42R1 attract each other. In addition, in the center diagram of FIG. 7, for the purpose of explanation, the N pole generated at one end of the coil by the current flowing through the coil is represented by a coarse cross pattern, and the S pole generated at the other end of the coil by the current flowing through the coil is represented by a fine cross pattern. The same is true in the lower diagram of FIG. 7. In the following, the direction of the current when the inside of the coil (the side closer to the optical axis OA) is the south pole is referred to as the "forward direction," and the direction of the current when the inside of the coil (the side closer to the optical axis OA) is the north pole is referred to as the "reverse direction."

7, when the side of the first right coil 42R1 facing the right magnet 6R (Y1 side) and the side of the second right coil 42R2 facing the right magnet 6R (Y1 side) are both excited to become north poles, the right magnet 6R moves further toward the X2 side along the optical axis direction. That is, after the first right coil 42R1 is excited so that the first right magnet 6R1 and the first right coil 42R1 repel each other, the second right coil 42R2 is excited so that the second right magnet 6R2 and the second right coil 42R2 attract each other, the right magnet 6R moves further toward the X2 side along the optical axis direction.

As shown in FIG. 4, the right-side magnet 6R is attracted to the right-side outer magnetic member 10RE by the magnetic attraction force acting between the right-side magnet 6R and the right-side outer magnetic member 10RE. Therefore, even if neither the first right-side coil 42R1 nor the second right-side coil 42R2 is excited, the right-side magnet 6R is held in its current position, and the second lens holder 3B, which moves together with the right-side magnet 6R, is also held in its current position. In other words, the lens holder driving device 100 is configured to be able to hold the second lens holder 3B in place until at least one of the first right-side coil 42R1 and the second right-side coil 42R2 is excited.

Next, referring to FIG. 8, the effect of the lens holder 3 being provided with the movable side metal plate portion 32 will be described. FIG. 8 is a cross-sectional view of the lens holder driving device 100. Specifically, the upper view of FIG. 8 shows a cross-section of the lens holder driving device 100 in a virtual plane parallel to the YZ plane including the cutting line CL1 shown in FIG. 1. The lower view of FIG. 8 is an enlarged view of the range R1 surrounded by the dashed line in the upper view of FIG. 8. Note that the following description referring to FIG. 8 relates to the front movable side metal plate portion 32F, but is also applicable to the rear movable side metal plate portion 32B having approximately the same configuration.

As shown in the upper diagram of FIG. 8, the first front yoke 14F, the front magnetic field generating member 15F, the front movable metal plate portion 32F (fourth portion 32F4), and the second front protrusion portion 72F of the first magnet holder 7F are bonded to one another by adhesive BD1 within the first front sidewall portion 30F1. In addition, the first front yoke 14F, the front magnetic field generating member 15F, the front movable metal plate portion 32F, and the second front protrusion portion 72F are all made of metal. Therefore, in the illustrated example, the four metal members are bonded together via adhesive BD1 within the first front sidewall portion 30F1.

This type of bonding between metal components has the advantage of being able to increase the adhesive strength between the bonded components compared to bonding between synthetic resin components or bonding between a synthetic resin component and a metal component.

As shown in the lower diagram of FIG. 8, the fifth portion 32F5 of the front movable side metal plate portion 32F, which is the base BS (front base BSF) constituting the bottom portion BT (front bottom BTF) of the lens holder 3, is disposed at a position separated by a gap GP1 from the upper surface of the fixed side metal plate portion 2B of the base plate 2. This means that the bottom surface of the first lens body LS1 is disposed at a position separated by a gap GP2 from the upper surface of the fixed side metal plate portion 2B of the base plate 2. The bottom surface of the first lens body LS1 and the fifth portion 32F5 of the front movable side metal plate portion 32F, which is the base BS (front base BSF), are fixed by adhesive BD4.

In this way, the front movable side metal plate portion 32F can reduce the thickness of the front base BSF while ensuring the strength and rigidity of the front base BSF, compared to when the front base BSF is made of a material other than a metal plate, such as synthetic resin. Therefore, the front movable side metal plate portion 32F can reduce the overall height of the lens holder drive device 100, compared to when the front base BSF is made of a material other than a metal plate, such as synthetic resin. In other words, this configuration can achieve a low profile of the lens holder drive device 100 while maximizing the space for accommodating the lens body LS. Note that the front base BSF (fifth portion 32F5) of the front movable side metal plate portion 32F may be formed with a concave or convex portion for the purpose of further increasing rigidity, etc.

Next, referring to Figs. 9 to 12, the holding mechanism HM that mechanically holds the lens holder 3 at a predetermined position will be described. Fig. 9 is a top view of the magnet holder 7 and the coil holder 5. Fig. 10 is a cross-sectional view of the coil holder 5 in which the magnet holder 7 is arranged. Specifically, Fig. 10 shows a cross-section of the coil holder 5 in a virtual plane parallel to the XZ plane including the cutting line CL2 shown in Fig. 9. The upper view of Fig. 10 shows the positional relationship between the second magnet holder 7B and the coil holder 5 when the second lens holder 3B is at the front movement limit position. The lower view of Fig. 10 shows the positional relationship between the second magnet holder 7B and the coil holder 5 when the second lens holder 3B is at a position away from the front movement limit position to the rear. Fig. 11 shows a top view of the holding mechanism HM. Specifically, FIG. 11 is a top view of the second magnet holder 7B and the lens holding assembly LH that constitute the holding mechanism HM, and shows the positional relationship between the second magnet holder 7B and the lens holding assembly LH when the second lens holder 3B is at the front movement limit position. The left view of FIG. 11 shows a state in which the engagement part EP of the second magnet holder 7B and the rotation engagement part RE of the lens holding assembly LH are engaged (engaged state), and the right view of FIG. 11 shows a state in which the engagement part EP of the second magnet holder 7B and the rotation engagement part RE of the lens holding assembly LH are disengaged (disengaged state). FIG. 12 is an exploded perspective view of the lens holding assembly LH. The engaged state is also called the "locked state", and the released state is also called the "unlocked state".

As shown in FIG. 11, the holding mechanism HM includes a lens holding assembly LH and a second magnet holder 7B. In this embodiment, the holding mechanism HM mechanically holds the second lens holder 3B at the movement limit position on the front side (X1 side). In addition, the holding mechanism HM can indirectly hold the first lens holder 3F by mechanically holding the second lens holder 3B.

The second magnet holder 7B is configured to be located between the cover member 1 and the coil holder 5, as shown in FIG. 10. Specifically, the second magnet holder 7B is positioned so that the lower stopper portion TD can contact the bottom wall portion 5B of the coil holder 5, and the upper stopper portion TU can contact the ceiling surface (upper surface portion 1B) of the cover member 1.

In addition, as shown in FIG. 11, the engagement portion EP of the second magnet holder 7B is configured to be able to engage with the rotational engagement portion RE of the lens holding assembly LH when the second lens holder 3B is at the front limit of movement in the optical axis direction.

As shown in FIG. 12, the lens holding assembly LH includes a rotating member 50, a magnet 51, a coil 52, a cylindrical member 53, a magnetic member 54, an iron core member 55, an upper cover 56, and a lower cover 57. The magnet 51, the coil 52, the magnetic member 54, and the iron core member 55 form an electromagnetic mechanism EM, and the cylindrical member 53, the upper cover 56, and the lower cover 57 form a case body CB. The lens holding assembly LH is housed in a recess 5U (see FIG. 9) provided in the right front corner of the coil holder 5.

The rotating member 50 is a member that includes a rotational engagement portion RE. In this embodiment, the rotating member 50 is formed of a non-magnetic material such as austenitic stainless steel, and is configured to be rotatable around a rotation axis 50X. In the illustrated example, the rotating member 50 includes a magnet arrangement portion 50M, a shaft portion 50V, a rotation side stopper portion 50K, and a protrusion portion 50E.

The magnet placement section 50M is the portion where the magnet 51 is placed, and has a recess 50U that receives the magnet 51.

The shaft portion 50V is a portion that is rotatably supported by the cylindrical member 53, and includes a first shaft portion 50V1 and a second shaft portion 50V2 that are spaced apart in the direction of the rotation axis 50X and sandwich the magnet arrangement portion 50M.

The rotation side stopper portion 50K cooperates with the stationary side stopper portion 56K of the upper cover 56 to form the stopper mechanism SM. In the illustrated example, the rotation side stopper portion 50K is provided at the end (the end on the X1 side) of the second shaft portion 50V2, and includes a first rotation side stopper portion 50K1 and a second rotation side stopper portion 50K2.

The stopper mechanism SM is a mechanism for limiting the rotation of the rotating member 50, and includes a first stopper mechanism SM1 that limits the rotation of the rotating member 50 in one direction, and a second stopper mechanism SM2 that limits the rotation of the rotating member 50 in the other direction. The first stopper mechanism SM1 is composed of a first rotating side stopper portion 50K1 and a first stationary side stopper portion 56K1, and the second stopper mechanism SM2 is composed of a second rotating side stopper portion 50K2 and a second stationary side stopper portion 56K2.

The protrusion 50E is a portion that protrudes from the end (X2 end) of the first shaft portion 50V1 in a direction that is approximately perpendicular to the direction of the rotation axis 50X. Specifically, the protrusion 50E has a first protrusion 50E1 that protrudes from the first shaft portion 50V1 in a first direction in a direction that is approximately perpendicular to the direction of the rotation axis 50X, and a second protrusion 50E2 that protrudes from the first shaft portion 50V1 in a second direction (opposite to the first direction) in a direction that is approximately perpendicular to the direction of the rotation axis 50X. The first protrusion 50E1 constitutes the rotation engagement portion RE.

The magnet 51 is a permanent magnet magnetized with two poles. In the illustrated example, one side portion 51N is magnetized with the north pole, and the other side portion 51S is magnetized with the south pole. The magnet 51 is fitted into a recess 50U formed in the magnet arrangement portion 50M of the rotating member 50 and fixed with adhesive.

The coil 52 is configured to excite the magnetic member 54 and the iron core member 55. In this embodiment, the coil 52 is configured by winding a wire around the iron core member 55.

The cylindrical member 53 is a member that forms the side surface of the lens holding assembly LH. In this embodiment, the cylindrical member 53 is formed of a non-magnetic material such as austenitic stainless steel. In the illustrated example, the cylindrical member 53 includes a first receiving portion 53V1 that rotatably supports the first shaft portion 50V1 of the rotating member 50, and a second receiving portion 53V2 that rotatably supports the second shaft portion 50V2 of the rotating member 50. The cylindrical member 53 is also configured to accommodate the coil 52, the magnetic member 54, and the iron core member 55.

The magnetic member 54 is configured to function as a yoke that increases the magnetic force generated by the coil 52 as an electromagnet. In this embodiment, the magnetic member 54 is made of a magnetic material and includes a left magnetic member 54L and a right magnetic member 54R.

The iron core member 55 is configured to function as the core of an electromagnet. In the illustrated example, the iron core member 55 is integrated with the left magnetic member 54L. The iron core member 55 is then inserted into the central hole of the coil 52, and its tip is then adhesively fixed to the right magnetic member 54R. The coil 52 and the iron core member 55 are also fixed together with an adhesive.

The upper cover 56 is a member that forms the upper surface of the lens holding assembly LH. In the illustrated example, the upper cover 56 is made of synthetic resin. The upper cover 56 also has a stationary side stopper portion 56K that cooperates with the rotating side stopper portion 50K of the rotating member 50 to form the stopper mechanism SM. Specifically, the stationary side stopper portion 56K is a portion provided on the front side surface of the upper cover 56, and includes a first stationary side stopper portion 56K1 and a second stationary side stopper portion 56K2.

The lower cover 57 is a member that forms the lower surface of the lens holding assembly LH. In this embodiment, the lower cover 57 is made of synthetic resin. In the illustrated example, a front recess 57RF for passing the first end 52F, which is one end of the coil 52, and a rear recess 57RB for passing the second end 52B, which is the other end of the coil 52, are formed on the side of the lower cover 57. In addition, a front protrusion 57PF and a rear protrusion 57PB (see FIG. 13) that protrude downward are formed on the lower surface of the lower cover 57. The first end 52F of the coil 52 is wound around the front protrusion 57PF, and the second end 52B of the coil 52 is wound around the rear protrusion 57PB.

Next, the movement of the lens holding assembly LH will be described with reference to Figs. 13 to 15. Fig. 13 is a perspective view of the lens holding assembly LH. Specifically, the upper left view of Fig. 13 is a view of the lens holding assembly LH that realizes the release state when viewed from the upper right front, and the upper right view of Fig. 13 is a view of the lens holding assembly LH that realizes the release state when viewed from the upper left rear. Also, the lower left view of Fig. 13 is a view of the lens holding assembly LH that realizes the engagement state when viewed from the upper right front, and the lower right view of Fig. 13 is a view of the lens holding assembly LH that realizes the engagement state when viewed from the upper left rear. Fig. 14 is a front view of the components of the lens holding assembly LH. Specifically, the upper left view and the lower left view of Fig. 14 are front views of the components of the lens holding assembly LH that realize the engagement state, and the upper right view and the lower right view of Fig. 14 are front views of the components of the lens holding assembly LH that realize the release state. 14 are front views of components other than the cylindrical member 53, and the bottom left and right views of FIG. 14 are front views of the magnet 51 and the magnetic member 54. FIG. 15 is a cross-sectional view of the holding mechanism HM. Specifically, FIG. 15 shows a cross-section of the second magnet holder 7B and the lens holding assembly LH (protrusion 50E) in a virtual plane parallel to the YZ plane including the cutting line CL3 shown in the left diagram of FIG. 11. Also, the figure GH represented by the two-dot chain line in FIG. 15 shows a cross-section of the lens holding assembly LH (protrusion 50E) in a virtual plane parallel to the YZ plane including the cutting line CL4 shown in the right diagram of FIG. 11.

The lens holding assembly LH is configured to rotate the rotating member 50 around the rotation axis 50X by the electromagnetic mechanism EM. Specifically, when a current is supplied to the coil 52, the magnetic member 54 is magnetized. In the example shown in the upper left and lower left diagrams of FIG. 14, when a current flows from the second end 52B to the first end 52F of the coil 52, the left magnetic member 54L is magnetized to have an S pole, and the right magnetic member 54R is magnetized to have an N pole. Note that in FIG. 14, for clarity, a coarse cross pattern is applied to the portion magnetized to the N pole, and a fine cross pattern is applied to the portion magnetized to the S pole.

In this case, the rotating member 50 to which the magnet 51 is attached receives a rotational torque due to the magnetic attraction force between the one side portion 51N (north pole) and the left magnetic member 54L (south pole), and the magnetic attraction force between the other side portion 51S (south pole) and the right magnetic member 54R (north pole). Therefore, the rotating member 50 is rotated around the rotation axis 50X in the direction indicated by the arrow AR11 in the upper left diagram of FIG. 14 (clockwise).

The first stopper mechanism SM1 limits the rotation of the rotating member 50 in the direction indicated by the arrow AR11. Specifically, the first stationary side stopper portion 56K1 provided on the upper cover 56 comes into contact with the first rotating side stopper portion 50K1, which is part of the rotating member 50, when the rotating member 50 rotates in the direction indicated by the arrow AR11, thereby limiting further rotation of the rotating member 50. Hereinafter, the state in which the rotation of the rotating member 50 in one direction (the direction indicated by the arrow AR11) is limited by the first stationary side stopper portion 56K1 is referred to as the "first restricted state."

In the first restricted state, when the supply of current to the coil 52 is stopped, the magnetization of the magnetic member 54 is also stopped. Even in this case, the rotational torque due to the magnetic attraction force between the one side portion 51N (north pole) and the left magnetic member 54L, and the magnetic attraction force between the other side portion 51S (south pole) and the right magnetic member 54R continues to act on the rotating member 50 to which the magnet 51 is attached. This rotational torque maintains the state in which the first rotating side stopper portion 50K1 is pressed against the first stationary side stopper portion 56K1, and can prevent the first rotating side stopper portion 50K1 from rotating counterclockwise and moving away from the first stationary side stopper portion 56K1.

In the example shown in the upper right and lower right diagrams of FIG. 14, when a current flows from the first end 52F to the second end 52B of the coil 52, the left magnetic member 54L is magnetized to be a north pole, and the right magnetic member 54R is magnetized to be a south pole. In this case, the rotating member 50 to which the magnet 51 is attached receives a rotational torque due to the magnetic attraction force between the one side portion 51N (north pole) and the right magnetic member 54R (south pole), and the magnetic attraction force between the other side portion 51S (south pole) and the left magnetic member 54L (north pole). Therefore, the rotating member 50 is rotated around the rotation axis 50X in the direction indicated by the arrow AR12 in the upper right diagram of FIG. 14 (counterclockwise).

The second stopper mechanism SM2 limits the rotation of the rotating member 50 in the direction indicated by the arrow AR12. Specifically, when the rotating member 50 rotates in the direction indicated by the arrow AR12, the second stationary side stopper portion 56K2 provided on the upper cover 56 comes into contact with the second rotating side stopper portion 50K2, which is part of the rotating member 50, and limits further rotation of the rotating member 50. Hereinafter, the state in which the rotation of the rotating member 50 in the other direction (the direction indicated by the arrow AR12) is limited by the second stationary side stopper portion 56K2 is referred to as the "second restricted state."

In the second restricted state, when the supply of current to the coil 52 is stopped, the magnetization of the magnetic member 54 is also stopped. Even in this case, the rotational torque due to the magnetic attraction force between the one side portion 51N (north pole) and the right magnetic member 54R, and the magnetic attraction force between the other side portion 51S (south pole) and the left magnetic member 54L continues to act on the rotating member 50 to which the magnet 51 is attached. This rotational torque maintains the state in which the second rotating side stopper portion 50K2 is pressed against the second stationary side stopper portion 56K2, and can prevent the second rotating side stopper portion 50K2 from rotating clockwise and moving away from the second stationary side stopper portion 56K2.

As shown in FIG. 15, when the rotating member 50 rotates counterclockwise around the rotation axis 50X by an angle θ from the posture in the first restricted state, it assumes a posture in the second restricted state. As shown in FIG. 15, the rotating engagement portion RE, which is the first protrusion 50E1 of the rotating member 50, engages with the engagement portion EP, which is the storage space portion PK provided in the second magnet holder 7B, in the first restricted state. Also, as shown by the figure GH in FIG. 15, the rotating engagement portion RE is disengaged from the engagement portion EP in the second restricted state. The rotation angle of the rotating engagement portion RE is the same as the rotation angle of the rotating member 50 (stationary side stopper portion 56K). In the illustrated example, the angle θ, which is the rotatable angle of the rotating member 50, is set to 80 degrees, but it may be an angle greater than 80 degrees or less than 80 degrees. In order to ensure reliable engagement, it is preferable that the angle θ is greater than 70 degrees and less than 90 degrees.

The accommodation space portion PK is a portion provided in the second magnet holder 7B that defines a space capable of receiving the rotation engagement portion RE. In the illustrated example, the accommodation space portion PK is a through hole that penetrates the second magnet holder 7B in the Y-axis direction and is partitioned by a wall portion WP, as shown in the left diagram of FIG. 11. However, the accommodation space portion PK may be a hole portion or a notch portion. Specifically, the hole portion is, for example, a recess that opens on the right side surface of the second magnet holder 7B and is recessed to the left without penetrating the second magnet holder 7B in the Y-axis direction. The notch portion is, for example, a notch portion that opens on each of the right side surface and the top surface of the second magnet holder 7B and is recessed to the left. The notch portion may be formed so as to open on each of the right side surface, the top surface, and the left side surface of the second magnet holder 7B.

In the illustrated example, the wall portion WP includes a front wall portion WPF and a rear wall portion WPB, as shown in FIG. 11. In the first restricted state, rearward (X2 direction) movement of the second magnet holder 7B is restricted by contact between the front surface of the rotational engagement portion RE and the front wall portion WPF that separates the storage space portion PK. Also, in the first restricted state, forward (X1 direction) movement of the second magnet holder 7B is restricted by contact between the rear surface of the rotational engagement portion RE and the rear wall portion WPB that separates the storage space portion PK.

On the other hand, in the second restricted state, the movement of the second magnet holder 7B forward (X1 direction) or backward (X2 direction) is not restricted by the holding mechanism HM. This is because, as shown in the right diagram of Figure 11, even if the second magnet holder 7B moves in the X-axis direction, the wall portion WP and the rotational engagement portion RE do not come into contact with each other.

As shown in FIG. 15, the wall portion WP includes an upper wall portion WPU and a lower wall portion WPD. The rotational engagement portion RE does not contact either the upper wall portion WPU or the lower wall portion WPD, not only in the second restricted state shown in FIG. GH, but also in the first restricted state. Specifically, the first stopper mechanism SM1 stops the clockwise rotation of the rotating member 50 around the rotation axis 50X with a gap GP5 between the upper end of the rotational engagement portion RE and the upper wall portion WPU.

This configuration, which ensures a gap GP5 between the upper end of the rotating engagement part RE and the upper wall part WPU in the first restricted state, has the effect of suppressing undesired release of the locked state, compared to a configuration in which the upper end of the rotating engagement part RE and the upper wall part WPU contact each other in the first restricted state. This is because if the upper end of the rotating engagement part RE and the upper wall part WPU contact each other in the first restricted state, the rotating engagement part RE may be bounced off due to sudden displacement of the upper wall part WPU when subjected to an impact such as a fall. In addition, the amount of engagement between the engagement part EP and the rotating engagement part RE (the contact area between the first protrusion 50E1 and the front wall part WPF) is approximately the same regardless of the presence or absence of the gap GP5. Therefore, in terms of the amount of engagement, a configuration that ensures the gap GP5 does not make the lock easier to release than a configuration that does not ensure the gap GP5.

In the illustrated example, the rotating member 50 with the magnet 51 fixed thereto is configured so that the position of its center of gravity is within the region ZN in front view, as shown in FIG. 15. The circular region ZN shown by the dashed line in FIG. 15 is within the outer contour of the first shaft portion 50V1 and the outer contour of the second shaft portion 50V2 in front view (when viewed from the X1 side). In the illustrated example, the diameter of the first shaft portion 50V1 is larger than the diameter of the second shaft portion 50V2, so the contour of the region ZN shown in FIG. 15 corresponds to the outer contour of the second shaft portion 50V2. Desirably, the rotating member 50 with the magnet 51 fixed thereto is configured so that the position of its center of gravity is within the region ZN in front view and is close to the rotation axis 50X. More desirably, the rotating member 50 with the magnet 51 fixed thereto is configured so that the position of its center of gravity is aligned with the position of the rotation axis 50X in front view.

This configuration allows the lens holding assembly LH to prevent the rotating member 50 from rotating undesirably when it is subjected to an impact due to being dropped, etc. This is because the farther the center of gravity of the rotating member 50 with the magnet 51 fixed is from the rotation axis 50X, the greater the rotational torque caused by its weight.

Now, referring again to FIG. 10, the positional relationship between the second magnet holder 7B and the coil holder 5 will be described. As shown in FIG. 10, the second magnet holder 7B has an upper stopper portion TU and a lower stopper portion TD for limiting the amount of movement when it vibrates in the vertical direction (Z-axis direction) due to an impact such as being dropped.

In the illustrated example, the lower stopper portion TD is arranged to come into contact with the upper surface (inner bottom surface) of the bottom wall portion 5B (bottom plate portion BP of the fixed side member FB) of the coil holder 5 when the front portion of the second magnet holder 7B (portion where the engagement portion EP is provided) moves downward. With this configuration, the lower stopper portion TD can limit the amount of downward movement of the front portion of the second magnet holder 7B.

The upper stopper portion TU is arranged to come into contact with the underside (ceiling surface) of the upper surface portion 1B of the cover member 1 when the front portion (the portion where the engagement portion EP is provided) of the second magnet holder 7B moves upward. With this configuration, the upper stopper portion TU can limit the amount of upward movement of the front portion of the second magnet holder 7B. Note that in FIG. 10, for the sake of explanation, the underside (ceiling surface) of the upper surface portion 1B of the cover member 1 is shown by a dashed line.

The coil holder 5 and the second magnet holder 7B are configured so that the size of the gap GP3 between the lower stopper TD and the bottom wall 5B of the coil holder 5 changes depending on the position of the second magnet holder 7B relative to the coil holder 5 in the X-axis direction. In the illustrated example, the coil holder 5 and the second magnet holder 7B are configured so that the size GP3A of the gap GP3 when the second magnet holder 7B is at the front movement limit position is smaller than the size GP3B of the gap GP3 when the second magnet holder 7B is not at the front movement limit position. Note that the second magnet holder 7B being at the front movement limit position means that the second lens holder 3B is at the front movement limit position. Specifically, the upper surface (inner bottom surface) of the bottom wall 5B of the coil holder 5 is configured so that the height of the part facing the lower stopper TD in the upper view of FIG. 10 is higher than the height of the part facing the lower stopper TD in the lower view of FIG. 10.

On the other hand, the cover member 1 and the second magnet holder 7B are configured so that the size of the gap GP4 between the upper stopper portion TU and the upper surface portion 1B of the cover member 1 does not change depending on the position of the second magnet holder 7B relative to the cover member 1 in the X-axis direction. In the illustrated example, the cover member 1 and the second magnet holder 7B are configured so that the size GP4A of the gap GP4 when the second magnet holder 7B is at the front movement limit position is the same as the size GP4B of the gap GP4 when the second magnet holder 7B is not at the front movement limit position.

With the above-described configuration, the lens holder driving device 100 can reduce the amount of vertical movement of the second magnet holder 7B caused by an impact or the like received in the first restricted state compared to when the second magnet holder 7B is not at the front movement limit position. Therefore, the lens holder driving device 100 can prevent the engagement between the engagement part EP and the rotational engagement part RE from being undesirably released due to an impact or the like received in the first restricted state.

The lower surface (ceiling surface) of the upper surface portion 1B of the cover member 1 may be configured so that the height of the portion facing the upper stopper portion TU in the upper view of FIG. 10 is lower than the height of the portion facing the upper stopper portion TU in the lower view of FIG. 10. This is to ensure that the size GP4A of the gap GP4 when the second magnet holder 7B is at the front limit of movement position is smaller than the size GP4B of the gap GP4 when the second magnet holder 7B is not at the front limit of movement position.

Next, the attachment of the lens holding assembly LH to the coil holder 5 will be described with reference to Figs. 16 and 17. Fig. 16 is a top view of a part (right front corner) of the coil holder 5, and corresponds to an enlarged view of the area R2 surrounded by a dashed line in Fig. 9. Specifically, the upper view of Fig. 16 is a top view of the right front corner of the coil holder 5 before the lens holding assembly LH is attached. The center view of Fig. 16 is a top view of the right front corner of the coil holder 5 after the lens holding assembly LH is attached. The lower view of Fig. 16 is a top view of the right front corner of the coil holder 5 after adhesive BD3 has been applied. Fig. 17 is a perspective view of the lens holding assembly LH to which adhesive BD3 has been attached, and shows the state of the lens holding assembly LH in the lower view of Fig. 16. Specifically, the upper view of Fig. 17 is a view of the lens holding assembly LH to which adhesive BD3 has been attached, viewed from the front right diagonally upward. Additionally, the bottom diagram in Figure 17 shows the lens holding assembly LH with adhesive BD3 attached, viewed from the upper right rear.

First, the lens holding assembly LH is fitted into the recess 5U provided in the right front corner of the coil holder 5, as shown in the upper diagram of FIG. 16. For clarity, the recess 5U is shown with a cross pattern in FIG. 16.

Specifically, the recess 5U includes a first recess 5U1 that houses the case body CB of the lens holding assembly LH, a second recess 5U2 that houses the stationary side stopper portion 56K of the upper cover 56, and a third recess 5U3 that houses the first shaft portion 50V1 of the shaft portion 50V. In addition, the side wall that defines the recess 5U is provided with a crush rib 5C, a contact portion 5T, and a groove 5G. Note that, although not shown in FIG. 16 for clarity, the fourth portion 94 of the printed wiring board 9 is placed at the bottom of the first recess 5U1 before the lens holding assembly LH is housed therein.

The crush rib 5C is a portion that is crushed and adheres closely to the lens holding assembly LH when the lens holding assembly LH is fitted into the recess 5U. In the illustrated example, the crush rib 5C includes a first crush rib 5C1 and a second crush rib 5C2.

The contact portion 5T is a portion that comes into contact with the case body CB when the lens holding assembly LH is fitted into the recess 5U. In the illustrated example, the contact portion 5T is a flat portion configured to come into surface contact with the side of the case body CB, and includes a first contact portion 5T1 to a third contact portion 5T3. Specifically, as shown in the center diagram of FIG. 16, the first contact portion 5T1 is arranged to come into contact with the right side (Y2 side surface) of the case body CB, and the second contact portion 5T2 and the third contact portion 5T3 are arranged to come into contact with the front side (X1 side surface) of the case body CB. The first crush rib 5C1 is arranged to come into contact with the rear side (X2 side surface) of the case body CB, and the second crush rib 5C2 is arranged to come into contact with the left side (Y1 side surface) of the case body CB.

The groove 5G is a structure for preventing the adhesive BD3 from flowing into the second recess 5U2 and the third recess 5U3 when the adhesive BD3 is applied to the lens holding assembly LH fitted in the recess 5U. In the illustrated example, the groove 5G includes the first groove 5G1 to the third groove 5G3. Specifically, the first groove 5G1 is a groove for receiving a portion of the adhesive BD3 applied between the right side surface of the case body CB and the inner wall surface of the first recess 5U1 that has entered the third recess 5U3 beyond the first crush rib 5C1. The second groove 5G2 is a groove for receiving a portion of the adhesive BD3 applied between the right side surface of the case body CB and the inner wall surface of the first recess 5U1 that is about to enter the second recess 5U2 beyond the second contact portion 5T2. The third groove 5G3 is a groove for receiving the portion of the adhesive BD3 applied between the left front corner of the case body CB and the inner wall surface of the first recess 5U1 that passes over the third contact portion 5T3 and attempts to enter the second recess 5U2.

The above-mentioned configuration can prevent the adhesive BD3 from entering the second recess 5U2 and adhering between the rotation side stopper portion 50K and the case body CB and solidifying, which would hinder the rotation of the rotation side stopper portion 50K (rotating member 50). The above-mentioned configuration can also prevent the adhesive BD3 from entering the third recess 5U3 and adhering between the first shaft portion 50V1 and the case body CB and solidifying, which would hinder the rotation of the first shaft portion 50V1 (rotating member 50).

Specifically, the adhesive BD3 applied to the lens holding assembly LH fitted into the recess 5U adheres to the cylindrical member 53, upper cover 56, and lower cover 57 that constitute the case body CB and solidifies, as shown in FIG. 17, but does not adhere to the rotating member 50.

Next, the details of the printed wiring board 9 will be described with reference to Figures 18 to 20. Figure 18 is a perspective view of the printed wiring board 9 attached to the base member BM. Specifically, the upper view of Figure 18 is a perspective view of the base plate 2, the coil assembly 4, the coil holder 5, and the printed wiring board 9. The lower view of Figure 18 is a perspective view of the base plate 2, the coil holder 5, and the printed wiring board 9, and shows a state in which the coil assembly 4 has been removed from the configuration shown in the upper view of Figure 18. Figure 19 is a top view and a front view of the printed wiring board 9. Specifically, the upper view of Figure 19 is a top view of the printed wiring board 9, and the central view of Figure 19 is a front view of the printed wiring board 9. The lower view of Figure 19 is a front view of a part of the printed wiring board 9, and corresponds to an enlarged view of the range R3 surrounded by a dashed line shown in the central view of Figure 19. Figure 20 is a perspective view of a part of the printed wiring board 9 attached to the base member BM. Specifically, the upper view of Figure 20 corresponds to an enlarged view of the range R4 shown by the dashed line in Figure 18. The center diagram of FIG. 20 shows the state in which the right coil set 42R is connected to the conductor pattern of the printed wiring board 9 shown in the upper diagram of FIG. 20 by the bonding material SD. The lower diagram of FIG. 20 shows the state in which the adhesive BD2 is applied to the first right portion 91R of the printed wiring board 9 shown in the center diagram of FIG. 20. Note that in the center diagram and the lower diagram of FIG. 20, the right board 41R is omitted for clarity. Also, in the lower diagram of FIG. 20, a cross pattern is applied to the adhesive BD2 for clarity.

As shown in FIG. 18, the printed wiring board 9, except for the fourth portion 94, is arranged and glued on the base plate 2 that constitutes part of the bottom plate portion BP of the fixed side member FB (base member BM). The fourth portion 94 is arranged at the bottom of the first recess 5U1 (see the upper diagram in FIG. 16). The printed wiring board 9 electrically connects the power source CS (see FIG. 21), which is a current supply source (current supply circuit) arranged outside the lens holder driving device 100, to each of the multiple coils arranged inside the lens holder driving device 100.

Specifically, as shown in the lower diagram of FIG. 18, the printed wiring board 9 has a first portion 91, a second portion 92, a third portion 93, and a fourth portion 94 (see the upper diagram of FIG. 19). The first portion 91, the third portion 93, and the fourth portion 94 are disposed within the accommodation portion SP, and the second portion 92 is disposed outside the accommodation portion SP. The accommodation portion SP includes a portion located in the cutout portion CU (left cutout portion CUL and right cutout portion CUR). The first portion 91 is disposed at a position corresponding to the cutout portion CU.

More specifically, the first portion 91 is a portion disposed directly below the coil assembly 4, and includes a first left portion 91L having a conductor pattern connected to the left coil set 42L, and a first right portion 91R having a conductor pattern connected to the right coil set 42R. The second portion 92 has a second left portion 92L adjacent to the first left portion 91L, and a second right portion 92R adjacent to the first right portion 91R. The third portion 93 has a conductor pattern connected to the magnetic sensor 18. The fourth portion 94 has a conductor pattern to which the coil 52 of the electromagnetic mechanism EM is connected. Specifically, on the lower surface (surface on the Z2 side) of the fourth portion 94, as shown in the upper diagram of FIG. 19, a fifth conductor pattern PT5 is formed by a conductive adhesive or solder or the like, which is conductively connected to both ends of the coil 52 constituting the electromagnetic mechanism EM included in the lens holding assembly LH. More specifically, a fifth conductor pattern PT5F to which the first end 52F of the coil 52 is conductively connected, and a fifth conductor pattern PT5B to which the second end 52B of the coil 52 is conductively connected are formed on the lower surface (the surface on the Z2 side) of the fourth portion 94.

Here, the first right portion 91R and the second right portion 92R will be described in detail with reference to FIG. 20. Note that the following description with reference to FIG. 20 also applies to the first left portion 91L and the second left portion 92L, which have substantially the same configuration.

In the illustrated example, the first right portion 91R includes six first conductor patterns PT1 (first conductor patterns PT1a to PT1f) as shown in the upper diagram of FIG. 20. The first conductor pattern PT1 is formed to increase the adhesive strength between the printed wiring board 9 and the adhesive BD2. Therefore, the first conductor pattern PT1 is not electrically connected to other components and is covered with the adhesive BD2 as shown in the lower diagram of FIG. 20. Note that the surface of the conductor pattern made of metal has higher wettability than the surface of the printed wiring board 9 made of an insulating material. Therefore, the adhesive strength between the first conductor pattern PT1 and the adhesive BD2 is higher than the adhesive strength between the insulating material and the adhesive BD2. The higher the adhesive strength, the less likely the adhesive BD2 will peel off from the printed wiring board 9 when it is subjected to an impact such as a drop.

20, the first right portion 91R includes a second conductor pattern PT2 connected to one end of the coil constituting the right coil set 42R, and a third conductor pattern PT3 connected to the other end of the coil constituting the right coil set 42R. Specifically, the first right portion 91R includes a second conductor pattern PT2a connected to one end of the first right coil 42R1, a third conductor pattern PT3a connected to the other end of the first right coil 42R1, a second conductor pattern PT2b connected to one end of the second right coil 42R2, and a third conductor pattern PT3b connected to the other end of the second right coil 42R2.

Specifically, as shown in the central diagram of FIG. 20, the first end TM1 (first end TM11) of the first right coil 42R1 is conductively connected to the second conductor pattern PT2a by the first bonding material SD1 (first bonding material SD11), and the other end, the second end TM2 (second end TM21), is conductively connected to the third conductor pattern PT3a by the second bonding material SD2 (second bonding material SD21). As shown in the central diagram of FIG. 20, the first end TM1 (first end TM12) of the second right coil 42R2 is conductively connected to the second conductor pattern PT2b by the first bonding material SD1 (first bonding material SD12), and the second end TM2 (second end TM22) is conductively connected to the third conductor pattern PT3b by the second bonding material SD2 (second bonding material SD22). The bonding material SD, which includes the first bonding material SD1 and the second bonding material SD2, is, for example, a conductive adhesive.

Two first conductor patterns PT1 (first conductor pattern PT1a and first conductor pattern PT1b) are arranged with a gap between the second conductor pattern PT2a and the third conductor pattern PT3a. Two first conductor patterns PT1 (first conductor pattern PT1e and first conductor pattern PT1f) are arranged with a gap between the second conductor pattern PT2b and the third conductor pattern PT3b. Furthermore, two first conductor patterns PT1 (first conductor pattern PT1c and first conductor pattern PT1d) are also arranged with a gap between the third conductor pattern PT3a and the second conductor pattern PT2b.

Such an arrangement of the first conductor pattern PT1 has the effect of preventing the ends TM of the first right coil 42R1 and the second right coil 42R2 from being short-circuited by the bonding material SD.

For example, even if the first bonding material SD11 that electrically connects the first end TM11 of the first right coil 42R1 to the second conductor pattern PT2a comes into contact with the first conductor pattern PT1a, and further, the second bonding material SD21 that electrically connects the second end TM21 of the first right coil 42R1 to the third conductor pattern PT3a comes into contact with the first conductor pattern PT1b, the first conductor pattern PT1a and the first conductor pattern PT1b are arranged with a gap between them, so that the first end TM11 and the second end TM21 of the first right coil 42R1 are not short-circuited.

In the illustrated example, the coil holder 5 has an enclosure EN (first enclosure EN1 to sixth enclosure EN6) formed integrally with the side wall SW so as to surround three of the four sides of each of the second conductor pattern PT2 and the third conductor pattern PT3, as shown in the upper diagram of FIG. 20. The enclosure EN has the effect of suppressing the undesired spreading of the bonding material SD when the fluid bonding material SD is applied to the conductor pattern. Therefore, the configuration having the enclosure EN has the effect of facilitating the adoption of an assembly method in which the right coil assembly 4R is fitted into the right cutout portion CUR in the fourth side wall portion 5A4 of the coil holder 5 after the bonding material SD is applied to the first right portion 91R of the printed wiring board 9. In addition, when such an assembly method is adopted, it becomes unnecessary to insert the tip of a needle for applying the bonding material SD into the gap between the first right portion 91R of the printed wiring board 9 and the right board 41R of the right coil assembly 4R. As a result, the occurrence of defects such as coil breakage caused by contact between the needle and the coil is suppressed. Therefore, this configuration has the effect of improving the workability of applying the bonding material SD and improving the reliability of the contact between the end TM of the coil and the bonding material SD (conductor pattern).

Specifically, the first enclosure EN1 is disposed on the right side of the second conductor pattern PT2a and prevents the first bonding material SD11 applied to the second conductor pattern PT2a from spreading to the right. The second enclosure EN2 is disposed in front of the third conductor pattern PT3a and prevents the second bonding material SD21 applied to the third conductor pattern PT3a from spreading forward. The third enclosure EN3 is disposed on the rear side of the third conductor pattern PT3a and prevents the second bonding material SD21 applied to the third conductor pattern PT3a from spreading backward. The fourth enclosure EN4 is disposed in front of the second conductor pattern PT2b and prevents the first bonding material SD12 applied to the second conductor pattern PT2b from spreading forward. The fifth enclosure EN5 is disposed on the rear side of the second conductor pattern PT2b and prevents the first bonding material SD12 applied to the second conductor pattern PT2b from spreading backward. The sixth enclosure EN6 is disposed to the right of the third conductor pattern PT3b and prevents the second bonding material SD22 applied to the third conductor pattern PT3b from spreading to the right.

In the illustrated example, the second right portion 92R includes eleven fourth conductor patterns PT4 (fourth conductor pattern PT4a to fourth conductor pattern PT4k), as shown in the lower diagram of FIG. 20.

After the first right coil 42R1 and the second right coil 42R2 are conductively connected to the conductor pattern by the bonding material SD, and the right board 41R supporting the first right coil 42R1 and the second right coil 42R2 is bonded and fixed to the fourth side wall portion 5A4 of the coil holder 5, the adhesive BD2 is applied to the first right portion 91R as shown in the lower diagram of FIG. 20. In reality, the adhesive BD2 is applied so as to fill the gap between the right board 41R of the right coil assembly 4R fitted into the right cutout portion CUR in the fourth side wall portion 5A4 of the coil holder 5 and the first right portion 91R of the printed wiring board 9 as shown in the upper diagram of FIG. 18. That is, the gap between the board 41 and the first portion 91 is sealed by the adhesive BD2. In the illustrated example, the first bonding material SD1 and the second bonding material SD2 are completely covered by the adhesive BD2, and the first conductor pattern PT1 is also completely covered. This configuration has the effect of increasing the adhesive strength between the right coil assembly 4R (right board 41R), the coil holder 5, and the printed wiring board 9 (first right portion 91R). This configuration also has the effect of increasing the insulation between the respective ends TM of the first right coil 42R1 and the second right coil 42R2.

As shown in the lower diagram of FIG. 19, the printed wiring board 9 is configured to have a step ST between the upper surface (Z1 side surface) of the first right portion 91R and the upper surface (Z1 side surface) of the second right portion 92R. Specifically, the printed wiring board 9 is a multilayer board in which multiple layers are stacked, and is configured so that the number of layers in the first right portion 91R is greater than the number of layers in the second right portion 92R. In the illustrated example, the first right portion 91R is configured with four layers, and the second right portion 92R is configured with two layers. The number of layers in the first right portion 91R is typically greater than the number of layers in the second right portion 92R, but may be less than or equal to the number of layers in the second right portion 92R. At least one of the first right portion 91R and the second right portion 92R may be configured with a single layer.

Furthermore, as shown in the lower diagram of FIG. 19, the first right portion 91R has a thickness TK1 that is greater than the thickness TK2 of the second right portion 92R. However, the thickness TK1 of the first right portion 91R may be less than or equal to the thickness TK2 of the second right portion 92R.

In the illustrated example, the lower surface (Z2 side surface) of the first right portion 91R and the lower surface (Z2 side surface) of the second right portion 92R are configured to be flush with each other. However, the printed wiring board 9 may be configured to have a step between the lower surface (Z2 side surface) of the first right portion 91R and the lower surface (Z2 side surface) of the second right portion 92R.

Such a configuration with a step ST has the effect of preventing the bonding material SD and adhesive BD2 from spreading from the first right portion 91R to the second right portion 92R. This is because the bonding material SD and adhesive BD2 that reach the step ST are prevented from entering the second right portion 92R by surface tension. Note that a recess that functions as an adhesive reservoir may be provided at the end of the step ST. This is to receive the bonding material SD or adhesive BD2 that has spread along the step ST, thereby further preventing the bonding material SD or adhesive BD2 from spreading from the first right portion 91R to the second right portion 92R.

Next, referring to FIG. 21, the control of the lens holder driving device 100 mounted on the camera-equipped mobile device will be described. FIG. 21 is a block diagram showing an example of the configuration of the control system SYS that controls the lens holder driving device 100.

The control system SYS mainly includes as its components the left magnetic sensor 18L, the right magnetic sensor 18R, the first left coil 42L1 and the second left coil 42L2 in the left coil set 42L, the first right coil 42R1 and the second right coil 42R2 in the right coil set 42R, and the coil 52 in the lens holding assembly LH, which are arranged in the lens holder driving device 100.

The control system SYS also includes as components an input device ID, a control device CTR, and a power source CS, which are arranged outside the lens holder driving device 100.

The input device ID is a device for accepting input to the control device CTR. In the example shown in FIG. 21, the input device ID is a touch panel installed on a mobile device with a camera.

The control device CTR is configured to be able to control a power source CS capable of supplying current to the lens holder driving device 100. In the example shown in FIG. 21, the control device CTR is configured to control the power source CS based on information from the input device ID, the left magnetic sensor 18L, the right magnetic sensor 18R, etc.

The power supply CS is configured to supply current individually to the first left coil 42L1 and the second left coil 42L2 in the left coil set 42L, the first right coil 42R1 and the second right coil 42R2 in the right coil set 42R, and the coil 52 in the lens holding assembly LH.

In the example shown in FIG. 21, the control device CTR can supply current of appropriate magnitude at appropriate timing to each component by controlling the power source CS using PWM control or the like. Specifically, for example, when the control device CTR receives a camera start signal from the input device ID, it PWM controls the power source CS to supply current to the coil 52 in the lens holding assembly LH.

The camera activation signal is a signal for activating the camera mounted on the camera-equipped mobile device. In the example shown in FIG. 21, the camera activation signal is output by a touch panel serving as an input device ID when a camera icon displayed on a touch panel display mounted on the camera-equipped mobile device is touched.

When the coil 52 in the lens holding assembly LH receives a current from the power source CS, as shown in FIG. 14, it rotates the rotating member 50 in the direction indicated by the arrow AR12 (counterclockwise) around the rotation axis 50X. That is, as shown in the lower right diagram of FIG. 14, the coil 52 magnetizes the left magnetic member 54L to the N pole and magnetizes the right magnetic member 54R to the S pole, thereby rotating the magnet 51 fixed to the rotating member 50 from the state shown in the lower left diagram of FIG. 14 to the state shown in the lower right diagram of FIG. 14. This is to change the state in which the engagement part EP and the rotation engagement part RE are engaged (engaged) as shown in the left diagram of FIG. 11 to a state in which the engagement (engagement) between the engagement part EP and the rotation engagement part RE is released as shown in the right diagram of FIG. 11. This release allows the second lens holder 3B to move freely in the optical axis direction, and as a result, the first lens holder 3F can also move freely in the optical axis direction.

Then, the control device CTR can supply a forward current to the first right coil 42R1 in the right coil set 42R by PWM controlling the power source CS. When the first right coil 42R1 receives a forward current from the power source CS, the magnetic force generated by the first right coil 42R1 attracts the first right magnet 6R1 and moves the second right magnet 6R2 backward. As a result, the control device CTR can move the second lens holder 3B (second lens body LS2) backward (X2 direction) from the position shown in the upper diagram of FIG. 7 (the movement limit position on the front side (X1 side)).

Then, the control device CTR can supply a current in the opposite direction to the first right coil 42R1 by PWM controlling the power source CS. When the first right coil 42R1 receives a current in the opposite direction from the power source CS, the magnetic force generated by the first right coil 42R1 can move the first right magnet 6R1 backward. In addition, the control device CTR can supply a current in the opposite direction to the second right coil 42R2 by PWM controlling the power source CS. When the second right coil 42R2 receives a current in the opposite direction from the power source CS, the magnetic force generated by the second right coil 42R2 can attract the second right magnet 6R2. As a result, the control device CTR can move the second lens holder 3B (second lens body LS2) from the position shown in the center diagram of FIG. 7 further backward (in the X2 direction) to the position shown in the lower diagram of FIG. 7.

The same control is performed by the control device CTR when the second lens holder 3B (second lens body LS2) is moved forward, when the first lens holder 3F (first lens body LS1) is moved backward, and when the first lens holder 3F (first lens body LS1) is moved forward.

The control device CTR can identify the position of the left magnet 6L (first lens holder 3F) based on the output of the left magnetic sensor 18L. Therefore, when moving the first lens body LS1 (first lens holder 3F) in the optical axis direction, the control device CTR can feedback control the direction and magnitude of the current supplied to each of the first left coil 42L1 and the second left coil 42L2 that make up the left coil set 42L based on the output of the left magnetic sensor 18L.

Similarly, the control device CTR can identify the position of the right magnet 6R (second lens holder 3B) based on the output of the right magnetic sensor 18R. Therefore, when moving the second lens body LS2 (second lens holder 3B) in the optical axis direction, the control device CTR can feedback control the direction and magnitude of the current supplied to each of the first right coil 42R1 and the second right coil 42R2 that make up the right coil set 42R based on the output of the right magnetic sensor 18R.

Then, when the control device CTR receives a camera stop signal from the input device ID, it can PWM control the power supply CS to move the first lens body LS1 (first lens holder 3F) and the second lens body LS2 (second lens holder 3B) to the front movement limit position.

The camera stop signal is a signal for stopping the function of the camera mounted on the camera-equipped mobile device. In the example shown in FIG. 21, the camera stop signal is output by the touch panel serving as the input device ID when a software button (icon) for stopping the camera function displayed on a touch panel display mounted on the camera-equipped mobile device is touched.

After moving the first lens holder 3F to its front limit position and moving the second lens holder 3B to its front limit position, the control device CTR supplies a current to the coil 52 in the lens holding assembly LH in the opposite direction to when the camera activation signal was received.

The control device CTR can determine whether the first lens holder 3F (left magnet 6L) has reached its front limit position based on the output of the left magnetic sensor 18L, and can determine whether the second lens holder 3B (second magnet 6B) has reached its front limit position based on the output of the right magnetic sensor 18R.

When the coil 52 in the lens holding assembly LH receives a current in the opposite direction from the power source CS, it rotates the rotating member 50 in the direction indicated by the arrow AR11 (clockwise) around the rotation axis 50X as shown in FIG. 14. That is, as shown in the lower left diagram of FIG. 14, the coil 52 magnetizes the left magnetic member 54L to the S pole and magnetizes the right magnetic member 54R to the N pole, thereby rotating the magnet 51 fixed to the rotating member 50 from the state shown in the lower right diagram of FIG. 14 to the state shown in the lower left diagram of FIG. 14. This is to change the state in which the engagement part EP and the rotation engagement part RE are disengaged (engaged) as shown in the right diagram of FIG. 11 to the state in which the engagement part EP and the rotation engagement part RE are engaged (engaged) as shown in the left diagram of FIG. 11. Due to this engagement, the movement of the second lens holder 3B in the optical axis direction is restricted, and as a result, the movement of the first lens holder 3F in the optical axis direction is also restricted.

By controlling as described above, the control device CTR can switch the state in which the engagement part EP and the rotation engagement part RE are engaged (locked state) to a state in which the engagement part EP and the rotation engagement part RE are disengaged (unlocked state), and conversely, can switch the unlocked state to the locked state. The control device CTR can also move each of the first lens holder 3F and the second lens holder 3B individually in the optical axis direction.

As described above, the lens holder driving device 100 according to the embodiment of the present disclosure includes, as shown in FIG. 3, a fixed-side member FB (base plate 2 and coil holder 5) having a bottom plate portion BP (fixed-side metal plate portion 2B and bottom wall portion 5B), a lens holder 3 capable of holding a lens body LS, a guide mechanism GM that guides the lens holder 3 along the bottom plate portion BP so as to be movable in the optical axis direction (X-axis direction), and a driving unit DM that moves the lens holder 3 in the optical axis direction (X-axis direction). As shown in FIG. 5, the lens holder 3 has an open upper portion and a bottom portion BT that faces the bottom plate portion BP. At least the bottom portion BT in the portion where the lens body LS is disposed is composed of a movable-side metal plate portion 32. This configuration provides the effect of making the height dimension of the lens holder driving device 100 smaller than when the entire lens holder 3 is made of a material other than metal, such as synthetic resin. In other words, this configuration provides the effect of making the lens holder driving device 100 lower in height.

The bottom plate portion BP may also be configured to have a fixed-side metal plate portion 2B that faces the movable-side metal plate portion 32. For example, as shown in FIG. 3, the bottom plate portion BP may have a fixed-side metal plate portion 2B that faces the movable-side metal plate portion 32 at least over the entire range of movement of the lens holder 3. This configuration provides the effect of making it possible to reduce the height dimension of the lens holder driving device 100 compared to when the entire base plate 2 is formed from a material other than metal, such as synthetic resin. In other words, this configuration provides the effect of making it possible to further reduce the height of the lens holder driving device 100.

The lens holder 3 may also have a pair of side walls 30 arranged to face each other at a distance in a direction (Y-axis direction) intersecting the optical axis (X-axis direction), as shown in FIG. 5. Each of the pair of side walls 30 may be made of a synthetic resin integrated with the movable metal plate portion 32. The movable metal plate portion 32 may also have a base portion BS constituting the bottom portion BT, and a folded portion FP folded from the base portion BS and embedded in the side wall portion 30, as shown in FIG. 6. This configuration has the effect of increasing the strength of the lens holder 3 compared to a configuration without the folded portion FP.

Furthermore, as shown in FIG. 6, the folding portion FP may have an adhesive portion AD that is exposed on the surface of the side wall portion 30 and is fixed to the lens body LS with an adhesive. This configuration has the effect of increasing the adhesive strength between the lens body LS and the lens holder 3.

The surface of the adhesive portion AD may have multiple convex or concave portions. In the example shown in FIG. 6, multiple concave portions are formed on the surface of the adhesive portion AD. This configuration has the effect of further increasing the adhesive strength between the lens body LS and the lens holder 3.

The bent portion FP may be bent multiple times from the base BS and may have a first bent portion FP1 bent upward from the base BS, and a second bent portion FP2 whose plate surface is approximately parallel to the plate surface of the base BS. In this case, the adhesive portion AD may be provided at least in the second bent portion FP2. In the example shown in FIG. 6, the first bent portion FP1 of the front movable side metal plate portion 32F includes the fourth portion 32F4, and the second bent portion FP2 of the front movable side metal plate portion 32F includes the third portion 32F3 and the ninth portion 32F9. The adhesive portion AD is provided in the third portion 32F3 and the ninth portion 32F9. The same is true for the rear movable side metal plate portion 32B. This configuration provides the effect of exposing the adhesive portion AD to the upper surface of the side wall portion 30. This configuration also provides the effect of increasing the strength of the lens holder 3 compared to a configuration without the second bent portion FP2.

The guide mechanism GM may also be composed of two parallel shafts 8 (see FIG. 3) provided on the fixed member FB, and a through hole TH (see FIG. 5) provided on the lens holder 3 through which the shafts 8 are inserted. The through hole TH may be formed in each of the pair of side walls 30, as shown in FIG. 5. The through hole TH is preferably located between the lower surface of the bottom BT and the upper surface of the side wall 30, as shown in FIG. 5. This is to reduce the height of the lens holder driving device 100. This configuration has the effect of being simpler in configuration and easier to assemble, compared to when balls are used as the guide mechanism GM.

The lens holder 3 may also have a magnetic field generating member 15, as shown in FIG. 5. The fixed side member FB (printed wiring board 9) may also have a magnetic sensor 18 that detects the magnetic field from the magnetic field generating member 15, as shown in FIG. 3. At least a portion of the magnetic field generating member 15 may also be fixed to the movable side metal plate portion 32 via adhesive BD1, as shown in FIG. 8. This configuration has the effect of increasing the adhesive strength between the magnetic field generating member 15 and the lens holder 3.

3, the lens holder driving device 100 according to the embodiment of the present disclosure includes a fixed member FB, a lens holder 3 capable of holding a lens body LS, a driving unit DM for moving the lens holder 3 in the optical axis direction, and a holding mechanism HM for holding the lens holder 3 at a predetermined position in the optical axis direction. The holding mechanism HM includes an engagement part EP provided on a movable member MB including the lens holder 3, a rotation engagement part RE that rotates to be engaged with the engagement part EP, and a rotation drive part (lens holding assembly LH) including an electromagnetic mechanism EM that includes a magnet 51 and a coil 52 and rotates the rotation engagement part RE. The rotation drive part (lens holding assembly LH) includes a rotation member 50 to which the magnet 51 or the coil 52 is fixed, and a receiving part 53V that rotatably supports the rotation member 50. The rotation engagement part RE is integrally provided on the rotation member 50. In the example shown in FIG. 12, the lens holding assembly LH has a rotating member 50 to which a magnet 51 is fixed, and a receiving portion 53V that rotatably supports the rotating member 50. The rotating engagement portion RE is formed by the first protrusion 50E1 of the rotating member 50 and is formed integrally with the rotating member 50. However, the rotating engagement portion RE and the rotating member 50 may be formed of separate members and integrated with an adhesive. This configuration does not require gears or the like because the rotating engagement portion RE is integrally provided with the rotating member 50. Therefore, this configuration has the effect of preventing the lens holder driving device 100 from becoming large, and thus reducing the size.

The holding mechanism HM may also have a limiting portion (stopper mechanism SM) that limits the rotation range of the rotating member 50. This configuration has the effect of ensuring that the engagement portion EP and the rotational engagement portion RE are engaged by appropriately setting the limiting portion (stopper mechanism SM). In other words, this configuration has the effect of preventing the rotating member 50 from rotating too far, causing the engagement to be released undesirably.

The electromagnetic mechanism EM may also be composed of an electromagnet. Specifically, as shown in FIG. 12, the lens holding assembly LH may have a magnet 51 fixed to the rotating member 50, a pair of magnetic members 54 arranged facing each other with the magnet 51 in between, an iron core member 55 provided to connect the pair of magnetic members 54, and a coil 52 provided around the iron core member 55. In this case, as shown in FIG. 14, the magnet 51 may have different magnetic poles in a one-side portion 51N located on one side and a other-side portion 51S located on the other side across a plane 50P including the rotation axis 50X of the rotating member 50. In the example shown in FIG. 14, the one-side portion 51N is magnetized to the N pole, and the other-side portion 51S is magnetized to the S pole. The lens holding assembly LH may also be configured such that the pair of magnetic members 54 are magnetized by a current flowing through the coil 52, and the rotating member 50 rotates due to the action of the magnetic force generated between the magnetic member 54 and the magnet 51. The rotation axis 50X of the rotating member 50 extends in the X-axis direction perpendicular to the direction in which the pair of magnetic members 54 face each other (the Y-axis direction). This configuration has the effect of simplifying the configuration of the rotation drive unit (lens holding assembly LH).

The limiting portion (stopper mechanism SM) may have a first stationary side stopper portion 56K1 that limits the rotation of the rotating member 50 in one direction, and a second stationary side stopper portion 56K2 that limits the rotation in the other direction. In this case, in a first limiting state in which the rotation of the rotating member 50 in one direction (the direction indicated by the arrow AR11) is limited by the first stationary side stopper portion 56K1, and in a state in which no current flows through the coil 52, a magnetic force that tries to rotate the rotating member 50 in one direction (the direction indicated by the arrow AR11) may act between the magnet 51 and the pair of magnetic members 54. In a second limiting state in which the rotation of the rotating member 50 in the other direction (the direction indicated by the arrow AR12) is limited by the second stationary side stopper portion 56K2, and in a state in which no current flows through the coil 52, a magnetic force that tries to rotate the rotating member 50 in the other direction (the direction indicated by the arrow AR12) may act between the magnet 51 and the pair of magnetic members 54. This configuration has the effect of making it difficult for the engaged state (locked state) to be released, even if an impact is applied due to a drop or other reason when no current is being supplied to the coil 52.

As shown in FIG. 14, the lens holding assembly LH may be configured such that the pair of magnetic members 54 (left magnetic member 54L and right magnetic member 54R) are parallel to the direction in which they face each other across the magnet 51 (Y-axis direction), and the plane 50P of the magnet 51 is inclined in different directions with respect to the first imaginary plane VP1 including the rotation axis 50X of the rotating member 50 in the first restricted state (see the lower left diagram of FIG. 14) and the second restricted state (see the lower right diagram of FIG. 14), and that during switching from the first restricted state to the second restricted state, the plane 50P passes through a state in which the second imaginary plane VP2, which is perpendicular to the first imaginary plane VP1 and includes the rotation axis 50X, is perpendicular to the first imaginary plane VP1. This configuration has the effect of realizing switching between the first restricted state and the second restricted state with a simple configuration using the magnet 51 and the magnetic member 54. This configuration also has the effect of realizing the function of maintaining the first restricted state and the second restricted state with a simple configuration without passing a current through the coil 52. Note that the angle θ1 between the first imaginary plane VP1 and the plane 50P in the first restricted state is an acute angle, and the angle θ2 between the first imaginary plane VP1 and the plane 50P in the second restricted state is also an acute angle. It is preferable that each of the angles θ1 and θ2 is 30 degrees or more and 50 degrees or less. It is also preferable that the sum of the angles θ1 and θ2 is 70 degrees or more and 90 degrees or less.

As shown in FIG. 12, the lens holding assembly LH may have a case body CB that houses a pair of magnetic members 54, an iron core member 55, and a coil 52 and has a receiving portion 53V. The limiting portion (stopper mechanism SM, stationary side stopper portion 56K) may be provided integrally with the case body CB that constitutes the fixed side member FB. This configuration has the advantage that, compared to a case in which the limiting portion (stopper mechanism SM) is provided on a movable side member MB such as the lens holder 3 (second magnet holder 7B), the problem of the engagement state (locked state) being undesirably released when subjected to an impact due to being dropped or the like is less likely to occur.

The movable member MB may also include an engagement member (second magnet holder 7B) in which an engagement portion EP is formed, as shown in FIG. 3. In this case, the engagement portion EP may be configured by a storage space portion PK (through hole, hole, or notch portion) into which the rotation engagement portion RE enters, as shown in FIG. 11 and FIG. 15. In addition, as shown in FIG. 15, in the first restricted state, the rotation engagement portion RE may be engaged with the engagement portion EP in the rotation direction of the rotation engagement portion RE in a state in which there is a gap GP5 between the wall portion WP that forms the storage space portion PK (through hole, hole, or notch portion) and the rotation engagement portion RE. This configuration has the effect of further suppressing undesired release of the engagement state (locked state) in the event of an impact due to a fall, etc. This is because it is possible to prevent the rotational engagement part RE from being bounced off due to sudden displacement of the wall part WP when it receives an impact due to being dropped, etc., and it is possible to prevent the rotational engagement part RE from being rotated in the direction indicated by the arrow AR12 (see the upper right diagram in Figure 14).

Also, as shown in FIG. 10, the fixed side member FB (coil holder 5) may have a bottom plate portion BP (bottom wall portion 5B) facing the movable side member MB. In this case, the gap GP3 between the portion (lower stopper portion TD) where the engagement portion EP of the movable side member MB (second magnet holder 7B) is formed and the bottom plate portion BP (bottom wall portion 5B) is preferably set to be smaller when the lens holder 3 is in a position held by the holding mechanism HM (see the upper diagram of FIG. 10) than when the lens holder 3 is in another position (see the lower diagram of FIG. 10). In the illustrated example, the fixed side member FB (coil holder 5) is configured so that the size GP3A of the gap GP3 when the movable side member MB is in the front movement limit position is smaller than the size GP3B of the gap GP3 when the movable side member MB is not in the front movement limit position. This configuration has the effect of further suppressing the undesired release of the engagement state (locked state) when an impact is received due to a fall or the like. This is because it is possible to reduce the amount of downward movement of the second magnet holder 7B when it receives an impact due to being dropped, etc., and it is possible to prevent the rotation engagement part RE from being rotated in the direction indicated by the arrow AR12 (see the upper right diagram in Figure 14) due to the downward movement of the second magnet holder 7B.

12, the receiving portion 53V may include a first receiving portion 53V1 and a second receiving portion 53V2 provided at a distance in the direction of the rotation axis 50X. The rotating member 50 may also have a magnet arrangement portion 50M in which the magnet 51 is arranged, a first shaft portion 50V1 and a second shaft portion 50V2 provided at a distance in the direction of the rotation axis 50X across the magnet arrangement portion 50M, and a protruding portion 50E protruding in a direction approximately perpendicular to the direction of the rotation axis 50X from the first shaft portion 50V1 located on the opposite side of the magnet arrangement portion 50M across the first receiving portion 53V1. In this case, the first shaft portion 50V1 may be rotatably supported by the first receiving portion 53V1, and the second shaft portion 50V2 may be rotatably supported by the second receiving portion 53V2. The protrusion 50E may have a first protrusion 50E1 protruding from the first shaft 50V1 in a first direction in a direction substantially perpendicular to the direction of the rotation axis 50X, and a second protrusion 50E2 protruding in a direction opposite to the first direction. The first protrusion 50E1 may constitute a rotation engagement portion RE, and may be configured such that the position of the center of gravity of the rotating member 50 in a state in which the magnet 51 is fixed, as viewed along the direction of the rotation axis 50X, is present within the region ZN of the first shaft 50V1 and the second shaft 50V2, as shown in FIG. This configuration provides the effect of further suppressing undesired release of the engagement state (locked state) when subjected to an impact due to a fall or the like. By moving the position of the center of gravity of the rotating member 50 with the magnet 51 fixed closer to the rotation axis 50X, the rotational torque caused by its weight can be reduced, and this rotational torque can be prevented from rotating the rotational engagement part RE in the direction indicated by the arrow AR12 (see the upper right diagram in Figure 14).

Also, as shown in FIG. 16, the fixed member FB (coil holder 5) may have an attachment portion (recess 5U) to which the rotation drive portion (lens holding assembly LH) is fixed. In this case, the attachment portion (recess 5U) may be provided with a rib (crush rib 5C) that contacts the rotation drive portion (lens holding assembly LH). The rotation drive portion (lens holding assembly LH) may be fixed to the attachment portion (recess 5U) by adhesive BD3. This configuration provides the effect of preventing adhesive BD3 from adhering to the rotation drive portion (rotating member 50 of lens holding assembly LH) and impeding the rotation of the rotation drive portion (rotating member 50 of lens holding assembly LH). This is because the amount of adhesive BD3 flowing from the first recess 5U1 to the third recess 5U3 is limited by the crush rib 5C.

3, the lens holder driving device 100 according to the embodiment of the present disclosure includes a fixed side member FB (base plate 2 and coil holder 5) having a side wall portion SW and a bottom plate portion BP forming a storage portion SP, a lens holder 3 capable of holding a lens body LS and housed in the storage portion SP movably relative to the fixed side member FB, a driving unit DM having at least a magnet 6 and coils (first left coil 42L1, second left coil 42L2, first right coil 42R1, second right coil 42R2) that move the lens holder 3 in the optical axis direction, and a printed wiring board 9 (flexible printed wiring board) supported by the bottom plate portion BP. The side wall portion SW has a cutout portion CU with an open upper portion. The printed wiring board 9 has a step ST (see the lower diagram of FIG. 19) between a first portion 91 arranged at a position corresponding to the cutout portion CU and a second portion 92 adjacent to the first portion 91 and located outside the cutout portion CU. Specifically, the first portion 91 includes a first left portion 91L and a first right portion 91R, and the second portion 92 includes a second left portion 92L and a second right portion 92R. The printed wiring board 9 also has a third portion 93 disposed between the first left portion 91L and the first right portion 91R. The first portion 91 and the third portion 93 are disposed in a housing portion SP including a cutout portion CU, and the second portion 92 is disposed by being pulled out from the cutout portion CU to the outside of the housing portion SP. The upper surface of the first portion 91 is located higher than the upper surface of the second portion 92. A part of the driving portion DM (coil assembly 4) is disposed above the first portion 91. An adhesive BD2 is provided between the first portion 91 and a part of the driving portion DM (coil assembly 4) as shown in the upper diagram of FIG. 18. This configuration provides the effect of suppressing the adhesive BD2 from flowing out from the first portion 91 to the second portion 92. This is because the adhesive BD2 moves along the edge of the first portion 91 due to surface tension. Therefore, this configuration has the effect of preventing the adhesive BD2 from adhering to the conductor pattern (fourth conductor pattern PT4) even if the conductor pattern is formed on the upper surface of the second portion 92 (second right portion 92R) as shown in the lower diagram of FIG. 20.

The printed wiring board 9 may be configured so that the thickness TK1 of the first portion 91 is greater than the thickness TK2 of the second portion 92, as shown in FIG. 19. This configuration has the effect of making it possible to make the lower surface of the first portion 91 and the lower surface of the second portion 92 flush with each other while maintaining the step ST between the first portion 91 and the second portion 92. Therefore, this configuration has the effect of making it easier to adhesively fix the printed wiring board 9 to the upper surface of the base plate 2.

The printed wiring board 9 may also be configured as a multilayer board in which multiple layers are stacked. In this case, the printed wiring board 9 may be configured so that the number of layers in the first portion 91 is greater than the number of layers in the second portion 92. This configuration provides the effect of easily and reliably forming a step ST between the first portion 91 and the second portion 92.

In addition, the first conductor pattern PT1 may be exposed on the top surface of the first portion 91 of the printed wiring board 9, as shown in the upper diagram of FIG. 20. In this case, the first conductor pattern PT1 may have adhesive BD2 attached thereto, as shown in the lower diagram of FIG. 20. This configuration has the effect of increasing the adhesive strength between the adhesive BD2 and the printed wiring board 9, and thus increasing the adhesive strength between each of the coil assembly 4 and the coil holder 5 and the printed wiring board 9. This is because the surface of the first conductor pattern PT1, which is made of metal, has a higher wettability than the surfaces of other portions of the printed wiring board 9, which are made of an insulating material.

20, the upper surface of the first portion 91 of the printed wiring board 9 may be provided with a second conductor pattern PT2 and a third conductor pattern PT3 arranged to sandwich the first conductor pattern PT1. The second conductor pattern PT2 may be conductively connected to the first end TM1 of the coil (first left coil 42L1, second left coil 42L2, first right coil 42R1, second right coil 42R2) by the first bonding material SD1. Similarly, the third conductor pattern PT3 may be conductively connected to the second end TM2 of the coil (first left coil 42L1, second left coil 42L2, first right coil 42R1, second right coil 42R2) by the second bonding material SD2. An adhesive BD2 may be attached to at least one of the first bonding material SD1 and the second bonding material SD2. This configuration provides the effect of increasing the adhesive strength between the coil set 42 and the printed wiring board 9. This is because the bonding material SD is sealed with adhesive BD2.

20, a plurality of first conductor patterns PT1 may be arranged side by side between the second conductor pattern PT2 and the third conductor pattern PT3, spaced apart and insulated from each other. This configuration has the effect of preventing electrical continuity between the second conductor pattern PT2a and the third conductor pattern PT3a, even if the first bonding material SD11 adheres to the first conductor pattern PT1a located next to the second conductor pattern PT2a, as shown in the upper diagram of FIG. 20, for example. This is because the first conductor pattern PT1a and the first conductor pattern PT1b are arranged with a gap between them.

20, a fourth conductor pattern PT4 used for connection to the outside may be provided on the upper surface of the second portion 92. This configuration has the effect of preventing foreign matter such as flux from entering the lens holder driving device 100 even when soldering is performed to connect the printed wiring board 9 to an external device such as the control device CTR. This is because the gap between the coil assembly 4 and the printed wiring board 9 is sealed with the adhesive BD2.

The fixed-side member FB may also have an enclosure EN formed integrally with the side wall SW so as to surround three of the four sides around the second conductor pattern PT2. In the example shown in the upper diagram of FIG. 20, the coil holder 5 has an enclosure EN formed integrally with the side wall SW so as to surround the front, left, and right of the second conductor pattern PT2a. The right side of the second conductor pattern PT2a is surrounded by the first enclosure EN1. The coil holder 5 also has an enclosure EN formed integrally with the side wall SW so as to surround the front, left, and rear of the second conductor pattern PT2b. The front of the second conductor pattern PT2b is surrounded by the fourth enclosure EN4, and the rear of the second conductor pattern PT2b is surrounded by the fifth enclosure EN5. The same applies to the enclosure EN surrounding the third conductor pattern PT3. This configuration has the effect of facilitating the connection between the second conductor pattern PT2 and the third conductor pattern PT3 and the coil set 42. This is because the required precision regarding the application position of the bonding material SD is relaxed.

The above describes preferred embodiments of the present invention in detail. However, the present invention is not limited to the above-described embodiments. Various modifications and substitutions can be applied to the above-described embodiments and the embodiments described below without departing from the scope of the present invention. The features described with reference to the above-described embodiments and the embodiments described below may be combined as appropriate as long as there is no technical contradiction.

For example, in the above embodiment, the coils constituting the coil set 42 have a coil axis, which is the center of winding of the coil, parallel to the Y axis, but the coil may have a coil axis parallel to the optical axis OA.

1: Cover member 1A: Outer plate portion 1A1: First side plate portion 1A2: Second side plate portion 1A3: Third side plate portion 1A4: Fourth side plate portion 1B: Top surface portion 2: Base plate 2B: Fixed side metal plate portion 2W: Standing portion 3: Lens holder 3B: Second lens holder 3F: First lens holder 4: Coil assembly 4L: Left coil assembly 4R: Right coil assembly 5: Coil holder 5A: Outer wall portion 5A1: First side wall portion 5A2: Second side wall portion 5A3: Third side wall portion 5A4: Fourth side wall portion 5B: Bottom wall portion 5C: Crush rib 5C1: First crush rib 5C2: Second crush rib 5G: Groove 5G1: First groove 5G2: Second groove 5G3: Third groove 5H: Through hole 5HL1: First left through hole 5HL2: Second left through hole 5HR1: First right through hole 5HR2: Second right through hole 5U: Recess 5U1: First recess 5U2: Second recess 5U3: Third recess 6: Magnet 6L: Left magnet 6L1: First left magnet 6L2: Second left magnet 6L3: Third left magnet 6R: Right magnet 6R1: First right magnet 6R2: Second right magnet 6R3: Third right magnet 7: Magnet holder 7B: Second magnet holder 7F: First magnet holder 8: Shaft 8L: Left shaft 8R: Right shaft 9: Printed wiring board 10: Magnetic member 10LE: Left outer magnetic member 10LI: Left inner magnetic member 10RE: Right outer magnetic member 10RI: Right inner magnetic member 11: First cushioning material 11LB: left rear cushioning material 11LF: left front cushioning material 11RB: right rear cushioning material 11RF: right front cushioning material 12: second cushioning material 12LB: left rear cushioning material 12LF: left front cushioning material 12RB: right rear cushioning material 12RF: right front cushioning material 13: third cushioning material 13B: rear cushioning material 13F: front cushioning material 14: first yoke 14B: first rear yoke 14F: first front yoke 15: magnetic field generating member 15B: rear magnetic field generating member 15F: front magnetic field generating member 16: second yoke 16B: second rear yoke 16F: second front yoke 17: magnet 17B: rear magnet 17F: front magnet 18: magnetic sensor 18L: left magnetic sensor 18R: right magnetic sensor 30: side wall portion 30B: rear side wall portion 30B1: first rear side wall portion 30B2: second rear side wall portion 30F: front side wall portion 30F1: first front side wall portion 30F2: second front side wall portion 32: movable side metal plate portion 32B: rear movable side metal plate portion 32B1: first part 32B2: second part 32B3: third part 32B4: fourth part 32B5: fifth part 32B6: sixth part 32B7: seventh part 32B8: eighth part 32B9: ninth part 32F: front movable side metal plate portion 32F1: first part 32F2: second part 32F3: third part 32F4: fourth part 32F5: fifth part 32F6: sixth part 32F7: seventh part 32F8: eighth part 32F9... 9th part 41... Substrate 41L... Left side substrate 41R... Right side substrate 42... Coil set 42L... Left side coil set 42L1... First left side coil 42L2... Second left side coil 42R... Right side coil set 42R1... First right side coil 42R2... Second right side coil 50... Rotating member 50E... Projection 50E1... First projection 50E2... Second projection 50K... Rotation side stopper portion 50K1... First rotation side stopper portion 50K2... Second rotation side stopper portion 50M... Magnet arrangement portion 50P... Plane 50V... Shaft portion 50V1... First shaft portion 50V2... Second shaft portion 50X... Rotation axis 51... Magnet 51N... One side portion 51S... Other side portion 52... Coil 52B... Second end 52F... First end 53: Cylindrical member 53V: Receiving portion 53V1: First receiving portion 53V2: Second receiving portion 54: Magnetic member 54L: Left magnetic member 54R: Right magnetic member 55: Core member 56: Upper cover 56K: Stationary side stopper portion 56K1: First stationary side stopper portion 56K2: Second stationary side stopper portion 57: Lower cover 57PB: Rear protrusion 57PF: Front protrusion 57RB: Rear recess 57RF: Front recess 71B: First rear protrusion 71F: First front protrusion 72B: Second rear protrusion 72F: Second front protrusion 91: First portion 91L: First left portion 91R: First right portion 92: Second portion 92L: Second left portion 92R: Second right portion 93: Third portion 94: Fourth part 100: Lens holder driving device AD: Adhesive part BD1, BD2, BD3: Adhesive BM: Base member BP: Bottom plate part BS: Base part BSB: Rear base part BSF: Front base part BT: Bottom part BTB: Rear bottom part BTF: Front bottom part CB: Case body CM: Camera module CS: Power supply CTR: Control device CU: Notch part CUL: Left side notch part CUR: Right side notch part DM: Driving part DM1: First driving part DM2: Second driving part EM: Electromagnetic mechanism EN: Enclosure part EN1: First enclosure part EN2: Second enclosure part EN3: Third enclosure part EN4: Fourth enclosure part EN5: Fifth enclosure part EN6: Sixth enclosure part EP: Engagement part FB: Fixed member FP: Bent portion FP1: First bent portion FP2: Second bent portion FPB: Rear bent portion FPBL: Left rear bent portion FPBR: Right rear bent portion FPF: Front bent portion FPFL: Left front bent portion FPFR: Right front bent portion GH: Shape GM: Guide mechanism GP1-GP5: Gap HM: Holding mechanism HS: Housing ID: Input device IS: Image sensor L1, L2: Central axis LH: Lens holding assembly LM: Lower member LS: Lens body LS1: First lens body LS2: Second lens body LT: Light M1, M2: Central axis MB: Movable member MR: Mirror OA: Optical axis PK: Housing space PT1, PT1a-PT1f: First conductor pattern PT2, PT2a, PT2b...Second conductor pattern PT3, PT3a, PT3b...Third conductor pattern PT4, PT4a to PT4k...Fourth conductor pattern PT5, PT5B, PT5F...Fifth conductor pattern RE...Rotational engagement portion SD...Jointing material SD1, SD11, SD12...First bonding material SD2, SD21, SD22...Second bonding material SM...Stopper mechanism SM1...First stopper mechanism SM2...Second stopper mechanism SP...Storage portion ST...Step SW...Side wall portion SYS...Control system TD...Lower stopper portion TH...Penetration portion THL...Left side penetration portion THL1...First left side penetration portion THL2...Second left side penetration portion THR...Right side penetration portion THR1...First right side penetration portion THR2: Second right-side penetration TM: End TM1, TM11, TM12: First end TM2, TM21, TM22: Second end TP: Top plate TU: Upper stopper VP1: First imaginary plane VP2: Second imaginary plane WP: Wall WPB: Rear wall WPD: Lower wall WPF: Front wall WPU: Upper wall ZN: Area

Claims (8)

A fixed member having a bottom plate portion;
a lens holder capable of holding a lens body;
a guide mechanism that guides the lens holder along the bottom plate portion so as to be movable in the optical axis direction;
a drive unit that moves the lens holder in an optical axis direction,
the lens holder is open at the top and has a bottom portion facing the bottom plate portion;
At least the bottom portion in the portion where the lens body is disposed is constituted by a movable-side metal plate portion.
4. A lens holder driving device comprising: The bottom plate portion is configured to have a fixed-side metal plate portion facing the movable-side metal plate portion.
2. The lens holder driving device according to claim 1. the lens holder has a pair of side walls that are spaced apart from each other and opposed to each other in a direction intersecting an optical axis direction,
Each of the pair of side walls is made of a synthetic resin that is integrated with the movable-side metal plate portion,
the movable-side metal plate portion has a base portion constituting the bottom portion, and a bent portion bent from the base portion and embedded in the side wall portion,
3. The lens holder driving device according to claim 1 or 2. the bent portion has an adhesive portion exposed on a surface of the side wall portion and fixed to the lens body by an adhesive.
4. The lens holder driving device according to claim 3. A plurality of convex or concave portions are formed on the surface of the adhesive portion.
5. The lens holder driving device according to claim 4. The bent portion is bent multiple times from the base portion, and includes a first bent portion bent upward from the base portion and a second bent portion having a plate surface substantially parallel to a plate surface of the base portion,
The adhesive portion is provided at least on the second folded portion.
5. The lens holder driving device according to claim 4. the guide mechanism is composed of two parallel shafts provided on the fixed member and a through-hole provided on the lens holder through which the shafts are inserted,
The through-hole is formed in each of the pair of side wall portions.
4. The lens holder driving device according to claim 3. The lens holder has a magnetic field generating member,
the fixed member has a magnetic sensor that detects a magnetic field from the magnetic field generating member,
The magnetic field generating member is fixed to the movable metal plate portion with an adhesive.
4. The lens holder driving device according to claim 3.

Images