CN117784350A

CN117784350A - Lens holder driving device

Info

Publication number: CN117784350A
Application number: CN202311221060.1A
Authority: CN
Inventors: 村山丈刚; 加藤拓也
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 2022-09-29
Filing date: 2023-09-21
Publication date: 2024-03-29
Also published as: JP2024050138A

Abstract

The object of the present invention is to reduce the height of a lens holder driving device. The lens holder driving device of the present invention comprises: a fixed side member (FB) having a bottom plate portion (BP); a lens holder (3) capable of holding a lens body (LS); a Guide Mechanism (GM) for guiding the lens holder (3) so that the lens holder (3) can move in the optical axis direction (X-axis direction) along the Bottom Plate (BP); and a driving unit (DM) for moving the lens holder (3) in the optical axis direction (X-axis direction). The lens holder (3) is open above and has a bottom BT facing the Bottom Plate (BP). At least the Bottom (BT) of the portion where the lens body (LS) is disposed is composed of a movable side metal plate portion (32).

Description

Lens holder driving device

Technical Field

The present application relates to a lens holder driving device.

Background

Conventionally, a lens holder driving device is known in which a lens barrel (lens body) is fixed to a lens holder (lens holder) and a lens holder is moved in an optical axis direction of the lens body to adjust a focus (see patent document 1).

Prior art literature

Patent literature

Patent document 1 japanese patent application laid-open publication No. 2019-091096

Disclosure of Invention

Problems to be solved by the invention

However, the lens holder has a substantially U-shaped cross section, and is configured such that the side wall portion and the bottom wall portion have substantially the same thickness, and therefore, the bottom wall portion cannot be thinned. Therefore, the height dimension of the lens holder driving device may be large.

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

Means for solving the problems

The lens holder driving device according to an embodiment of the present invention includes: a fixed side member having a bottom plate portion; a lens holder capable of holding a lens body; a guide mechanism that guides the lens holder so that the lens holder can move in the optical axis direction along the bottom plate portion; and a driving unit that moves the lens holder in the optical axis direction, wherein in the lens holder driving device, the lens holder is opened upward and has a bottom portion facing the bottom plate portion, and at least the bottom portion of the portion where the lens body is disposed is constituted by a movable-side metal plate portion.

Effects of the invention

The lens holder driving device can reduce the height dimension.

Drawings

Fig. 1 is an exploded perspective view of a lens holder driving device.

Fig. 2 is a schematic diagram of a camera module.

Fig. 3 is an exploded perspective view of the lower member.

Fig. 4 is a perspective view of the magnetic attraction mechanism.

Fig. 5 is a perspective view of the movable-side member.

Fig. 6 is a view of the movable-side metal plate portion.

Fig. 7 is a plan view of the lens holder, the coil assembly, the driving magnet, and the shaft.

Fig. 8 is a cross-sectional view of the lens holder driving device.

Fig. 9 is a plan view of the magnet holder and the coil holder.

Fig. 10 is a cross-sectional view of a coil holder provided with a magnet holder.

Fig. 11 is a top view of the magnet holder and lens holder assembly.

Fig. 12 is an exploded perspective view of the lens holder assembly.

Fig. 13 is a perspective view of a lens holder assembly.

Fig. 14 is a front view of the constituent elements of the lens holding assembly.

Fig. 15 is a cross-sectional view of the retaining mechanism.

Fig. 16 is a top view of a portion of a coil holder.

Fig. 17 is a perspective view of the lens holder assembly with the adhesive attached.

Fig. 18 is a perspective view of the printed wiring board mounted on the base member.

Fig. 19 is a plan view and a front view of the printed wiring board.

Fig. 20 is a perspective view of a part of the printed wiring board mounted on the base member.

Fig. 21 is a block diagram showing a configuration example of a control system for controlling the lens holder driving device.

Detailed Description

Hereinafter, a lens holder driving device 100 according to an embodiment of the present application will 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 view of a camera module CM in a portable device with a camera, on which the lens holder driving apparatus 100 is mounted. As shown in fig. 1 and 2, the lens holder driving device 100 is configured to be capable of moving the lens body LS along the optical axis OA of the lens body LS.

In fig. 1, X1 represents one direction of an X axis constituting a three-dimensional orthogonal coordinate system, and X2 represents the other direction of the X axis. Further, 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. Likewise, 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 the present 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 (back 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. 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. In the present embodiment, the optical axis OA extends parallel to the X axis. The same applies to the other figures.

As shown in fig. 1, the lens holder driving apparatus 100 includes a cover member 1 and a lower member LM as a part of a fixed side member FB. The cover member 1 is configured to cover the upper surface and the side surface of the lower member LM. In the present embodiment, the cover member 1 is formed of a nonmagnetic material such as austenitic stainless steel. Since the cover member 1 is formed of a non-magnetic material, the magnetic force of the driving portion using electromagnetic force is not adversely affected.

The cover member 1 has a box-like shape without a bottom. The cover member 1 includes an outer plate portion 1A including four side plate portions (first to fourth side plate portions 1A1 to 1 A4), and a substantially rectangular and flat upper surface portion 1B provided continuously with an upper end (end on the Z1 side) of the outer plate portion 1A. The first side plate portion 1A1 has an opening portion for receiving light LT from the subject reflected by the mirror MR (refer to fig. 2). Similarly, the third side plate portion 1A3 has an opening for allowing the light LT to reach the imaging element IS (see fig. 2). The cover member 1 is joined to the base member BM by an adhesive or the like, and constitutes the housing HS together with the base member BM. The base member BM includes a substrate 2 and a coil holder 5.

The lens body LS is an example of an optical member, and is configured to have one or a plurality of lenses. In the present embodiment, the lens body LS includes a substantially T-shaped lens barrel having a partially cylindrical tubular portion formed in the center thereof and at least one lens, and the central axis of the lens barrel (tubular portion) is configured to be along 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 move the lens body LS in the optical axis direction by a driving unit DM housed in the housing HS. The "optical axis direction" includes a 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 in the optical axis direction as indicated by a double arrow AR1, and can move the second lens body LS2 in the optical axis direction as indicated by a double arrow AR 2. That is, the lens holder driving device 100 can move each of the first lens body LS1 and the second lens body LS2 in the optical axis direction.

As shown in fig. 2, the lens holder driving device 100 is used for a camera module CM such as a periscope type camera module. In the example shown in fig. 2, the camera module CM mainly includes a mirror MR, a lens body LS, a lens holder driving device 100, an imaging element IS, and the like. The mirror MR as a reflector may be a prism. In the present embodiment, the mirror MR is configured to have a flat reflection surface.

As shown in fig. 2, the lens holder driving apparatus 100 is typically disposed at a position farther from the subject than the mirror MR. That IS, the lens holder driving apparatus 100 IS configured to cause the light LT from the subject reflected by the mirror MR to reach the imaging element IS through the lens body LS.

Next, an outline of 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 a state in which the movable member MB is 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 side member MB, a substrate 2, a coil block 4, a coil holder 5, a shaft 8, a printed wiring substrate 9, a magnetic member 10, a first buffer 11, a magnetic sensor 18, and a lens holder LH as the fixed side member FB.

The substrate 2 is a member constituting a part (bottom) of the housing HS. In the present embodiment, the substrate 2 is formed of a nonmagnetic material such as austenitic stainless steel, as in the case of the cover member 1. In the illustrated example, the substrate 2 includes a fixed-side metal plate portion 2B that constitutes a part of the bottom plate portion BP of the fixed-side member FB, and five standing portions 2W that extend upward from end portions of the fixed-side metal plate portion 2B. The five standing portions 2W are embedded in the coil holder 5 by insert molding. The fixed-side metal plate portion 2B may not be a complete flat plate. In the present embodiment, as shown in fig. 3, the fixed-side metal plate portion 2B has three protruding portions extending in the optical axis direction, and is formed in a substantially flat plate shape as a whole. These three protrusions protrude slightly upward from the reference surface (upper surface) of the fixed-side metal plate portion 2B, improving the rigidity of the fixed-side metal plate portion 2B.

The lens holder 3 is configured to be capable of holding the lens body LS. In the present embodiment, the lens holder 3 is formed by embedding a metal plate in a synthetic resin such as a Liquid Crystal Polymer (LCP) by insert molding. The lens holder 3 includes a first lens holder 3F configured to be able to hold the first lens body LS1, and a second lens holder 3B configured to be able to hold the second lens body LS 2.

The coil holder 5 is configured to support the movable side member MB so as to be movable, and to support the coil block 4 so as to be immovable. In the present embodiment, the coil holder 5 is formed by injection molding a synthetic resin such as a Liquid Crystal Polymer (LCP). Further, the coil holder 5 constitutes a base member BM together with the substrate 2. In the illustrated example, a part of the substrate 2 is embedded in the coil holder 5 by insert molding. However, the substrate 2 may be fixed to the coil holder 5 by an adhesive. That is, the substrate 2 may be buried in the coil holder 5.

In the illustrated example, the coil holder 5 has an outer wall portion 5A including four side wall portions (first to fourth side wall portions 5A1 to 5 A4), and a substantially rectangular frame-shaped bottom wall portion 5B provided continuously with a lower end (end on the Z2 side) of the outer wall portion 5A. The bottom wall portion 5B may be separated into two, for example. The first side wall portion 5A1 has an opening for receiving the 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 imaging element IS. The coil holder 5 further has a notch CU for receiving the coil block 4. The notch portion CU includes a left notch portion CUL formed in the second side wall portion 5A2 and a right notch portion CUR formed in the fourth side wall portion 5 A4.

The fixed-side member FB is configured to form a housing portion SP that houses the movable-side member MB. The housing portion SP is a space defined by a top plate portion TP (see fig. 1), a side wall portion SW, and a bottom plate portion BP. In the example shown in the drawing, the top plate portion TP is constituted by the upper surface portion 1B of the cover member 1, the side wall portion SW is constituted by the outer wall portion 5A of the coil holder 5, and the bottom plate portion BP is constituted by the fixed-side metal plate portion 2B of the substrate 2 and the bottom wall portion 5B of the coil holder 5.

The coil block 4 is configured to hold a coil group 42 constituting the driving section DM. In the present embodiment, the coil block 4 includes a substrate 41 and a coil block 42. In the example shown in the figure, the substrate 41 is formed of a flexible printed wiring substrate, and is fixed to the coil holder 5 by an adhesive. In fig. 3, the coil is not shown in detail in a wound state of the conductive wire material covered with the insulating material for the sake of clarity. The same applies to the other figures.

The coil block 4 includes a left coil block 4L fitted into the left notch portion CUL of the coil holder 5, and a right coil block 4R fitted into the right notch portion CUR of the coil holder 5. The left coil block 4L includes a left substrate 41L and a left coil block 42L (a first left coil 42L1 and a second left coil 42L 2). Further, the right coil assembly 4R includes a right substrate 41R and a right coil group 42R (a first right coil 42R1 and a second right coil 42R 2).

The coil assembly 42 is a member constituting an electromagnet as the driving unit DM, and is mounted on the substrate 41. In the present embodiment, the coils constituting the coil group 42 are winding-type coils. Specifically, the left coil block 42L is mounted on the left side substrate 41L of the left coil block 4L, and the right coil block 42R is mounted on the right side substrate 41R of the right coil block 4R.

In the illustrated example, the left coil group 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 to be able to control the direction of the current flow, respectively. Also, the right coil group 42R includes a first right coil 42R1 and a second right coil 42R2. The first right-side coil 42R1 and the second right-side coil 42R2 are configured to be able to control the directions of the current flows, respectively.

The magnet 6 is a member constituting the driving unit DM, and is also referred to as a "driving magnet". The driving unit DM is configured to move the movable-side member MB in the optical axis direction by a magnetic force (attractive force or repulsive force) acting between the coil group 42 functioning as an electromagnet and the magnet 6 serving as a driving magnet. In the present 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 permanent magnets magnetized to two poles. The first left magnet 6L1, the third left magnet 6L3, the first right magnet 6R1, and the third right magnet 6R3 are magnetized to the S pole on the inner side (on the side closer to the optical axis OA) and the N pole on the outer side. The second left magnet 6L2 and the second right magnet 6R2 are magnetized to the N pole on the inner side and to the S pole on the outer side. In fig. 3, for clarity, a sparse cross pattern is labeled on the N-pole portion of the magnet 6, and a dense cross pattern is labeled on the S-pole portion of the magnet 6. The same applies to the other figures.

The magnet holder 7 is a member constituting the driving unit DM, and is configured to be able to hold the magnet 6. In the present embodiment, the magnet holder 7 is formed of a magnetic member such as a magnetic metal, and is configured to function as a yoke for efficiently applying the magnetic force of the magnet 6 to the coil. The magnet holder 7 includes a first magnet holder 7F adhesively fixed to the first lens holder 3F, and a second magnet holder 7B adhesively fixed to the second lens holder 3B.

The left magnet 6L is fixed to the first magnet holder 7F by an adhesive, and the right magnet 6R is fixed to the second magnet holder 7B by an adhesive. The left magnet 6L fixed to the first magnet holder 7F is disposed so as to face the left coil group 42L provided in the left coil assembly 4L and to be separated from the left coil group 42L in a direction perpendicular to the optical axis OA (Y-axis direction). Similarly, the right magnet 6R fixed to the second magnet holder 7B is disposed so as to be opposed to the right coil group 42R provided in the right coil assembly 4R and separated from the right coil group 42R in a direction perpendicular to the optical axis OA (Y-axis direction).

The shaft 8 is a member constituting the guide mechanism GM. The guide mechanism GM is a mechanism for guiding the bottom BT of the lens holder 3 so as to be movable in the optical axis direction (X-axis direction) along the bottom plate portion BP (reference plane). In the illustrated example, the shaft 8 is inserted through a through hole 5H formed in the coil holder 5 and fixed to the coil holder 5 by an adhesive. Specifically, the shaft 8 includes a left shaft 8L inserted through and fixed to the first left through hole 5HL1 and the second left through hole 5HL2, and a right shaft 8R inserted through and fixed to the first right through hole 5HR1 and the second right through hole 5HR 2. The left shaft 8L and the right shaft 8R are arranged to extend in the optical axis direction and to be parallel to each other.

The printed wiring board 9 is a member electrically connected to a coil, a magnetic sensor, or the like constituting 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 substrate 2 by an adhesive. The printed wiring board 9 includes the magnetic sensor 18, the coil group 42 included in the coil block 4, and a conductor pattern made of copper for supplying electric power to the coil 52 and the like constituting the electromagnetic mechanism EM (see fig. 12) included in the lens holding unit LH.

The magnetic sensor 18 is one example of a magnetic detection means. In the present embodiment, the magnetic sensor 18 is configured to be able to detect the magnetism generated by the magnetic field generating member 15 (see fig. 5) attached to the movable side member MB. The magnetic sensor 18 is constituted by a giant magnetoresistance effect (Giant Magneto Resistive effect: GMR) element, and is configured to measure a voltage value that varies according to the magnitude of the magnetic field generated by the magnetic field generating member 15 received by the magnetic sensor 18, and output the measured voltage value to the control device CTR (see fig. 21). The control device CTR is configured to be able 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 it approaches the N pole portion, and to output a smaller voltage value as it approaches the S pole portion. However, the magnetic sensor 18 may be configured to output a smaller voltage value as it approaches the N pole portion and to output a larger voltage value as it approaches the S pole portion. The magnetic sensor 18 may be configured to be able to detect the position of the lens holder 3 by using other magnetoresistive elements such as a semiconductor magnetoresistive (Semiconductor Magneto Resistive:smr) element, an anisotropic magnetoresistive (Anisotropic Magneto Resistive:amr) element, or a tunnel magnetoresistive (Tunnel Magneto Resistive:tmr) element, or may be configured to be able to detect the position of the lens holder 3 by 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. The left magnetic sensor 18L and the right magnetic sensor 18R are mounted on the third portion 93 of the printed wiring board 9.

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

Specifically, as shown in fig. 4, the magnetic member 10 is disposed apart from the magnet included in the movable-side member MB in the Z-axis direction. Fig. 4 is a perspective view of the magnetic attraction mechanism composed of the magnet included in the magnetic member 10 and the movable-side member MB, and shows the positional relationship between the magnet (the magnet 6, the magnetic field generating member 15, and the magnet 17) included in the magnetic member 10 and the movable-side member MB. In fig. 4, the components other than the magnet 6, the magnetic member 10, the magnetic field generating member 15, the magnet 17, and the magnetic sensor 18 are omitted for clarity. In fig. 4, the N-pole portions of the magnets included in the movable-side member MB are marked with a sparse cross pattern, and the S-pole portions of the magnets included in the movable-side member MB are marked with a dense cross pattern.

More specifically, the left outer magnetic member 10LE is disposed so as to face the left magnet 6L in the Z-axis direction, and the right outer magnetic member 10RE is disposed so as to face the right magnet 6R in the Z-axis direction. The left inner magnetic member 10LI is disposed so as to face the upper rear magnet 17B in the Z-axis direction, and the right inner magnetic member 10RI is disposed so as 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 suppressing the movable side member MB from lifting from the shaft 8.

The first cushioning material 11 is a member for absorbing and cushioning an impact when the fixed side member FB contacts the movable side member MB. In the present embodiment, the first cushioning material 11 is formed of rubber, sponge, or the like. In the illustrated example, the first cushion material 11 is a member formed of silicone rubber, and includes a left front cushion material 11LF, a right front cushion material 11RF, a left rear cushion material 11LB, and a right rear cushion material 11RB.

The left front side cushioning material 11LF is adhesively fixed to the coil holder 5 so as to be able to absorb the shock when the coil holder 5 is in contact with the front end portion (the end portion on the X1 side) of the first magnet holder 7F. The right front side cushioning material 11RF is adhesively fixed to the coil holder 5 so as to be able to absorb the shock when the coil holder 5 contacts the front end portion (the end portion on the X1 side) of the second magnet holder 7B. The left rear cushion 11LB is adhesively fixed to the coil holder 5 so as to absorb the shock when the coil holder 5 contacts the rear end (X2 side end) of the first magnet holder 7F. The right rear cushion material 11RB is adhesively fixed to the coil holder 5 so as to be able to absorb the impact when the coil holder 5 contacts the rear end (the X2 side end) of the second magnet holder 7B.

The lens holding unit LH is an example of a rotation driving unit, and is configured to be able to hold the lens holder 3 at a predetermined position in the optical axis direction. In the present embodiment, the lens holding unit LH is configured to be capable of holding the lens holder 3 at a movement limit position, which is an example of a position within a movable range in the optical axis direction. The movement limit position refers to a position of the lens holder 3 when the lens holder 3 moves to one end of the movable range of the lens holder 3. However, the lens holder assembly LH may hold the lens holder 3 in the vicinity of the movement limit position in the optical axis direction. In the illustrated example, the lens holder assembly LH is configured to be capable of holding the first lens holder 3F and the second lens holder 3B at the movement limit positions on the front side (X1 side). The lens holding assembly LH is attached to a fourth portion 94 of the printed wiring board 9 (see fig. 19).

Next, the movable-side member MB will be described in detail 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 a 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 the first lens body LS1, and a second lens holder 3B that holds the second lens body LS 2.

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 magnet holder 7, the second cushioning material 12, the third cushioning material 13, the first yoke 14, the magnetic field generating member 15, the second yoke 16, and the magnet 17 are attached to the pair of side wall portions 30.

In the illustrated example, the first lens holder 3F includes a first magnet holder 7F, a pair of front side wall portions 30F, and a front movable side metal plate portion 32F. The pair of front side wall portions 30F includes a first front side wall portion 30F1 and a second front side wall portion 30F2. The first front side wall portion 30F1 is provided with the first magnet holder 7F, the left front side cushioning material 12LF, the first front yoke 14F, and the front magnetic field generating member 15F, and the second front side wall portion 30F2 is provided with the right front side cushioning material 12RF, the front side cushioning material 13F, the second front yoke 16F, and the front magnet 17F. The first magnet holder 7F has a first front protruding portion 71F protruding inward (Y2 side) and a second front protruding portion 72F. The first magnet holder 7F is fixed to the first front side wall portion 30F1 by an adhesive in a state where the first front side protruding portion 71F and the second front side protruding portion 72F are respectively inserted into corresponding concave portions formed on the left side surface of the first front side wall portion 30F1. Further, since a part of the front movable-side metal plate portion 32F is exposed on the left side surface of the first front side wall portion 30F1, at least a part of the inner side surface (right side surface) of the first magnet holder 7F is fixed to the front movable-side metal plate portion 32F by an adhesive. That is, the adhesion between the first magnet holder 7F and the first front side wall portion 30F1 is partially achieved by the adhesion of the metal members to each other.

Similarly, the second lens holder 3B includes a second magnet holder 7B, a pair of rear side wall portions 30B, and a rear movable side metal plate portion 32B. The pair of rear side wall portions 30B includes a first rear side wall portion 30B1 and a second rear side wall portion 30B2. The second magnet holder 7B, the right rear cushion 12RB, the first rear yoke 14B, and the rear magnetic field generating member 15B are attached to the first rear side wall portion 30B1, and the left rear cushion 12LB, the rear cushion 13B, the second rear yoke 16B, and the rear magnet 17B are attached to the second rear side wall portion 30B2. The second magnet holder 7B has a first rear side collision portion 71B (see fig. 9) protruding inward (Y1 side), and a second rear side collision portion 72B (see fig. 9). The second magnet holder 7B is fixed to the first rear side wall portion 30B1 by an adhesive in a state where the first rear side collision portion 71B and the second rear side collision portion 72B are respectively inserted into corresponding concave portions formed on the right side surface of the first rear side wall portion 30B1. Further, since a part of the rear movable-side metal plate portion 32B is exposed on the right side surface of the first rear side wall portion 30B1, at least a part of the inner side surface (left side surface) of the second magnet holder 7B is fixed to the rear movable-side metal plate portion 32B by an adhesive. The adhesion between the second magnet holder 7B and the first rear side wall portion 30B1 is partially achieved by adhesion of the metal members to each other.

The side wall portion 30 is formed with a through portion TH as a through hole through which the shaft 8 is inserted. Specifically, left through portions THL through which the left shaft 8L is inserted are formed in the first front side wall portion 30F1 and the second rear side wall portion 30B2, respectively, and right through portions THR through which the right shaft 8R is inserted are formed in the first rear side wall portion 30B1 and the second front side wall portion 30F2, respectively. More specifically, the first front side wall portion 30F1 is formed with a first left side through portion THL1 through which the left side shaft 8L is inserted, the second rear side wall portion 30B2 is formed with a second left side through portion THL2 through which the left side shaft 8L is inserted, the second front side wall portion 30F2 is formed with a first right side through portion THR1 through which the right side shaft 8R is inserted, and the first rear side wall portion 30B1 is formed with a second right side through portion THR2 through which the right side shaft 8R is inserted. The lens holder driving device 100 may be configured such that the shaft 8 does not pass through the side wall 30 but passes through the lens body LS, or such that the shaft 8 passes through both the side wall 30 and the lens body LS.

The second cushioning material 12 is a member for absorbing and cushioning the impact when the coil holder 5 contacts the side wall portion 30. In the present embodiment, the second cushioning material 12 is formed of rubber, sponge, or the like. In the illustrated example, the second cushioning material 12 is a member formed 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 cushion material 12LF is adhesively fixed to the front end portion of the first front side wall portion 30F1 so as to be able to absorb the impact when the coil holder 5 is in contact with the front end portion (the X1 side end portion) of the first front side wall portion 30F 1. The right front side cushioning material 12RF is adhesively fixed to the front end portion of the second front side wall portion 30F2 so as to be able to absorb the impact when the coil holder 5 is in contact with the front end portion (the X1 side end portion) of the second front side wall portion 30F 2. The left rear cushion 12LB is adhesively fixed to the rear end portion of the second rear side wall portion 30B2 so as to absorb the impact when the coil holder 5 contacts the rear end portion (the X2 side end portion) of the second rear side wall portion 30B 2. The right rear cushion material 12RB is adhesively fixed to the rear end portion of the first rear side wall portion 30B1 so as to be able to absorb the impact when the coil holder 5 is in contact with the rear end portion (the X2 side end portion) of the first rear side wall portion 30B 1.

The third cushioning material 13 is a member for absorbing and cushioning an impact when the front side wall portion 30F contacts the rear side wall portion 30B. In the present embodiment, the third cushioning material 13 is formed of rubber, sponge, or the like. In the illustrated example, the third cushioning material 13 is a member formed of silicone rubber, and includes a front cushioning material 13F and a rear cushioning material 13B.

The front cushion material 13F is adhesively fixed to the rear end portion of the second front side wall portion 30F2 so as to absorb an impact when the rear end portion of the second front side wall portion 30F2 contacts the front end portion of the first rear side wall portion 30B 1. The rear cushion 13B is adhesively fixed to the front end portion of the second rear side wall portion 30B2 so as to absorb an impact when the rear end portion of the first front side wall portion 30F1 contacts the front end portion of the second rear side wall portion 30B 2.

The magnetic field generating member 15 is a member configured to be able to generate a magnetic field. In the illustrated example, as shown in fig. 4, the magnetic field generating member 15 is a permanent magnet that is multipolar magnetized in the X-axis direction, and includes a front magnetic field generating member 15F fixed to the first front side wall portion 30F1 of the first lens holder 3F, and a rear magnetic field generating member 15B fixed to the first rear side wall portion 30B1 of the second lens holder 3B. Specifically, as shown in fig. 4, the magnetic field generating member 15 is magnetized such that N poles and S poles are alternately arranged in the X-axis direction.

The first yoke 14 is a member for improving 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 side wall portion 30F1 in order to increase the magnetic force of the front side 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 side wall portion 30B1 in order to increase the magnetic force of the rear side magnetic field generating member 15B.

The magnet 17 is a member provided on the movable-side member MB so that a magnetic attractive force can act between the magnetic member 10 and the magnet 17. In the illustrated example, as shown in fig. 4, the magnet 17 is a permanent magnet bipolar magnetized in the Z-axis direction, and includes a front side magnet 17F adhesively fixed to a recess formed in the bottom surface of the second front side wall portion 30F2 of the first lens holder 3F, and a rear side magnet 17B adhesively fixed to a recess formed in the bottom surface of the second rear side wall portion 30B2 of the second lens holder 3B.

The second yoke 16 is a member for improving the magnetic force of the magnet 17. In the example shown in the drawing, the second yoke 16 includes a second front yoke 16F that is bonded and fixed to a recess formed in the bottom surface of the second front side wall portion 30F2 in order to increase the magnetic force of the front magnet 17F, and a second rear yoke 16B that is bonded and fixed to a recess formed in the bottom surface of the second rear side wall portion 30B2 in order to increase the magnetic force of the rear magnet 17B.

As shown in the upper view of fig. 5, the lens holder 3 has a bottom BT that is opened upward and faces the bottom plate portion BP (see fig. 3) of the fixed-side member FB. At least the bottom BT of the portion where the lens LS is disposed is constituted by the movable-side metal plate portion 32. The lens holder 3 has a pair of side wall portions 30 provided so as to face each other in a direction (Y-axis direction) intersecting the optical axis direction (X-axis direction) in a spaced apart manner. The pair of side wall portions 30 are each made of synthetic resin integrated with the movable-side metal plate portion 32.

As shown in fig. 6, the movable-side metal plate portion 32 includes a base portion BS that forms the bottom portion BT, and a bent portion FP that is bent from the base portion BS and buried in the side wall portion 30.

Fig. 6 is a diagram of the movable-side metal plate portion 32 constituting the lens holder 3. Specifically, the upper view of fig. 6 is a plan view of the front movable-side metal plate portion 32F and the rear movable-side metal plate portion 32B, the center view of fig. 6 is a front view of the rear movable-side metal plate portion 32B, and the lower view of fig. 6 is a front view of the front movable-side metal plate portion 32F.

Specifically, as shown in the lower view of fig. 6, the front movable-side metal plate portion 32F includes a base portion BS (front base portion BSF) that forms the bottom BT (front bottom portion BTF), and a bent portion FP (front bent portion FPF) that is bent from the base portion BS (front base portion BSF) and buried in the side wall portion 30 (front side wall portion 30F). Further, the front side bending portion FPF includes a left front side bending portion FPFL and a right front side bending portion FPFR.

More specifically, the front movable-side metal plate portion 32F is configured to include the first to ninth portions 32F1 to 32F9. The first to fourth portions 32F1 to 32F4 constitute a left front bent portion FPFL buried in the first front side wall portion 30F1, and the sixth to ninth portions 32F6 to 32F9 constitute a right front bent portion FPFR buried in the second front side wall portion 30F 2.

The second portion 32F2, the third portion 32F3, and the ninth portion 32F9 are embedded in the front side wall portion 30F so as to be partially exposed from the front side wall portion 30F, and the exposed portions constitute an adhesive portion AD to be fixed with other members by an adhesive. Specifically, the adhesive portion AD of the second portion 32F2 is fixed to the first magnet holder 7F by 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 by an adhesive BD4 (see fig. 8).

Similarly, as shown in the central view of fig. 6, the rear movable metal plate portion 32B includes a base portion BS (rear base portion BSB) that forms a bottom portion BT (rear bottom portion BTB), and a bent portion FP (rear bent portion FPB) bent from the base portion BS (rear base portion BSB) and buried in the side wall portion 30. Further, the rear side bent portion FPB includes a left rear side bent portion FPBL and a right rear side bent portion FPBR.

More specifically, the rear movable-side metal plate portion 32B includes first to ninth portions 32B1 to 32B9. The first to fourth portions 32B1 to 32B4 constitute a right rear bent portion FPBR buried in the first rear side wall portion 30B1, and the sixth to ninth portions 32B6 to 32B9 constitute a left rear bent portion FPBL buried in the second rear side wall portion 30B 2.

The second portion 32B2, the third portion 32B3, and the ninth portion 32B9 are each embedded in the rear side wall portion 30B so as to be partially exposed from the rear side wall portion 30B, and the exposed portions constitute an adhesive portion AD to be fixed with other members with an adhesive. Specifically, the adhesive portion AD of the second portion 32B2 is fixed to the second magnet holder 7B by 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 by an adhesive.

In the illustrated example, a plurality of concave portions are formed on the surface of the adhesive portion AD, which is a portion exposed on the surface of the side wall portion 30. This is to improve the adhesive strength between the movable-side metal plate portion 32, the lens body LS, and the magnet holder 7 by the adhesive. The plurality of concave portions may be a plurality of convex portions.

Next, the driving unit DM will be described with reference to fig. 7. Fig. 7 is a plan view of the lens holder 3, the coil block 4, the magnet 6, and the shaft 8. Specifically, the upper diagram of fig. 7 shows a case where both the first lens holder 3F (first lens body LS 1) and the second lens holder 3B (second lens body LS 2) are at the movement limit positions on the front side. Further, the center view of fig. 7 shows the case where the first lens holder 3F (first lens body LS 1) is at the front-side movement limit position and the second lens holder 3B (second lens body LS 2) is at the position separated from the front-side movement limit position to the rear. Further, the lower diagram of fig. 7 shows a case when the first lens holder 3F (first lens body LS 1) is at the front side movement limit position and the second lens holder 3B (second lens body LS 2) is at the rear side movement limit position. In fig. 7, the components other than the lens holder 3, the coil block 4, the magnet 6, and the shaft 8 are omitted for clarity.

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

Specifically, the driving section DM includes a first driving section DM1 that moves the first lens holder 3F in the optical axis direction, and a second driving section DM2 that moves the second lens holder 3B in the optical axis direction. The first driving unit DM1 is configured by a left coil block 42L mounted on a left substrate 41L of the left coil block 4L, and a left magnet 6L mounted on the first magnet holder 7F. The second driving unit DM2 is configured by a right coil block 42R mounted on a right substrate 41R of the right coil block 4R, and a right magnet 6R mounted on the second magnet holder 7B.

Next, an example of the relationship between the electromagnet and the magnetic pole by the magnetic pole of the right magnet 6R and the right coil group 42R when the second lens holder 3B at the front movement limit position is moved to the rear movement limit position will be described. The following description with reference to fig. 7 is related to the movement of the second lens holder 3B by the second driving unit DM2, but is also applicable to the movement of the first lens holder 3F by the first driving unit DM 1.

When the second lens holder 3B is at the front movement limit position, the right magnet 6R is located at a position facing the first right coil 42R1 in the Y-axis direction as shown in the upper view of fig. 7. In the illustrated example, the center axis M1 of the right magnet 6R (second right magnet 6R 2) at the center position in the optical axis direction (X-axis direction) does not coincide with the center axis L1 of the first right coil 42R1 at the center position in the optical axis direction. This is because if the central axis M1 coincides with the central axis L1, the right magnet 6R may not be separated by a repulsive force (repulsive force) when the first right coil 42R1 is excited. The central axis M1 is a straight line parallel to the Y axis passing through the center point of the second right magnet 6R2, and the central axis L1 is a straight line parallel to the Y axis passing through the center point of the first right coil 42R 1.

Similarly, when the first lens holder 3F is at the front movement limit position, the left magnet 6L is located at a position facing the first left coil 42L1 in the Y-axis direction as shown in the upper view of fig. 7. Further, the center axis M2 of the left magnet 6L (second left magnet 6L 2) at the center position in the optical axis direction (X axis direction) does not coincide with the center axis L2 of the first left coil 42L1 at the center position in the optical axis direction.

Then, as shown in the central diagram of fig. 7, when the first right coil 42R1 is excited such that the side (Y1 side) of the first right coil 42R1 opposite to the right magnet 6R becomes an S-pole, the first right magnet 6R1 is attracted by the first right coil 42R1 and moves toward the X2 side in the optical axis direction. This is because the magnetic force acts to repel the second right magnet 6R2 from the first right coil 42R1 and attract the first right magnet 6R1 from the first right coil 42R 1. 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 sparse 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 dense cross pattern. The same applies to the lower drawing of fig. 7. Hereinafter, the direction of the current when the inner side of the coil (the side closer to the optical axis OA) becomes the S-pole is referred to as "forward direction", and the direction of the current when the inner side of the coil (the side closer to the optical axis OA) becomes the N-pole is referred to as "reverse direction".

Then, as shown in the lower diagram of fig. 7, when the first right coil 42R1 is excited so that both the side (Y1 side) facing the right magnet 6R and the side (Y1 side) facing the right magnet 6R of the second right coil 42R2 become N poles, the right magnet 6R moves further toward the X2 side in 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, when 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 in the optical axis direction.

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

Next, the effect of the lens holder 3 having the movable-side metal plate portion 32 will be described with reference to fig. 8. Fig. 8 is a cross-sectional view of the lens holder driving apparatus 100. Specifically, the upper diagram 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 cutoff line CL1 shown in fig. 1. The lower diagram of fig. 8 is an enlarged diagram of a range R1 surrounded by a broken line in the upper diagram of fig. 8. The following description with reference to fig. 8 is related to the front movable-side metal plate portion 32F, but is also applicable to the rear movable-side metal plate portion 32B having substantially the same configuration.

As shown in the upper view of fig. 8, the first front yoke 14F, the front magnetic field generating member 15F, the front movable-side metal plate portion 32F (fourth portion 32F 4), and the second front protruding portion 72F of the first magnet holder 7F are bonded to each other in the first front side wall portion 30F1 by the adhesive BD 1. The first front yoke 14F, the front magnetic field generating member 15F, the front movable-side metal plate portion 32F, and the second front protruding portion 72F are each formed of metal. Therefore, in the illustrated example, the four metal members are bonded to each other via the adhesive BD1 in the first front side wall portion 30F 1.

Such adhesion of the metal members brings about an effect that the adhesion strength between the adhered members can be improved as compared with adhesion of the synthetic resin members to each other or adhesion of the synthetic resin members to the metal members.

As shown in the lower view of fig. 8, a fifth portion 32F5 of the front movable-side metal plate portion 32F, which is the base BS (front base BSF) that constitutes the bottom BT (front bottom BTF) of the lens holder 3, is disposed at a position separated from the upper surface of the fixed-side metal plate portion 2B of the substrate 2 by a gap GP 1. This means that the bottom surface of the first lens body LS1 is located at a position separated from the upper surface of the fixed-side metal plate portion 2B of the substrate 2 by a gap GP 2. The bottom surface of the first lens body LS1 and the fifth portion 32F5 of the front movable-side metal plate portion 32F serving as the base BS (front base BSF) are fixed by an adhesive BD 4.

In this way, the front side movable metal plate portion 32F can be thinned while ensuring the strength and rigidity of the front side base BSF, as compared with the case where the front side base BSF is formed of a material other than a metal plate, such as a synthetic resin. Therefore, the front movable-side metal plate portion 32F can reduce the overall height of the lens holder driving device 100, compared to the case where the front base portion BSF is formed of a material other than a metal plate, such as a synthetic resin. That is, this configuration can reduce the height of the lens holder driving device 100 while securing the space for accommodating the lens body LS to the maximum. Further, a concave portion or a convex portion may be formed in the front base BSF (the fifth portion 32F 5) of the front movable-side metal plate portion 32F for the purpose of further improving rigidity or the like.

Next, the holding mechanism HM for mechanically holding the lens holder 3 at a predetermined position will be described with reference to fig. 9 to 12. Fig. 9 is a plan view of the magnet holder 7 and the coil holder 5. Fig. 10 is a cross-sectional view of the coil holder 5 provided with the magnet holder 7. Specifically, fig. 10 shows a cross section of the coil holder 5 in a virtual plane parallel to the XZ plane including the cut line CL2 shown in fig. 9. Further, the upper diagram 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 in the movement limit position on the front side. 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 separated from the front-side movement limit position toward the rear. Fig. 11 shows a top view of the holding mechanism HM. Specifically, fig. 11 is a plan view of the second magnet holder 7B and the lens holding unit LH constituting the holding mechanism HM, showing the positional relationship between the second magnet holder 7B and the lens holding unit LH when the second lens holder 3B is at the movement limit position on the front side. The left view of fig. 11 shows a state (engaged state) in which the engagement portion EP of the second magnet holder 7B is engaged with the rotating engagement portion RE of the lens holder LH, and the right view of fig. 11 shows a state (released state) in which the engagement portion EP of the second magnet holder 7B is released from the rotating engagement portion RE of the lens holder LH. Fig. 12 is an exploded perspective view of the lens holding assembly LH. The engaged state is also referred to as a "locked state", and the released state is also referred to as an "unlocked state".

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

As shown in fig. 10, the second magnet holder 7B is configured to be located between the cover member 1 and the coil holder 5. Specifically, the second magnet holder 7B is configured such that the lower limiter portion TD can be in contact with the bottom wall portion 5B of the coil holder 5, and the upper limiter portion TU can be in contact with the top plate surface (upper surface portion 1B) of the cover member 1.

As shown in fig. 11, the engagement portion EP of the second magnet holder 7B is configured to be engageable with the rotation engagement portion RE of the lens holding unit LH when the second lens holder 3B is at the movement limit position on the front side 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, a core member 55, an upper cover 56, and a lower cover 57. The magnet 51, the coil 52, the magnetic member 54, and the core member 55 constitute an electromagnetic mechanism EM, and the tubular member 53, the upper cover 56, and the lower cover 57 constitute a case CB. The lens holding unit LH is accommodated 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 including a rotating engagement portion RE. In the present embodiment, the rotating member 50 is made of a nonmagnetic material such as austenitic stainless steel, and is rotatable about the 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 protruding portion 50E.

The magnet arrangement portion 50M is a portion where the magnet 51 is arranged, and has a recess 50U for receiving the magnet 51.

The shaft portion 50V is rotatably supported by the tubular member 53, and includes a first shaft portion 50V1 and a second shaft portion 50V2 provided so as to be separated from each other in the direction of the rotation axis 50X via the magnet arrangement portion 50M.

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

The stopper mechanism SM is a mechanism for restricting the rotation of the rotating member 50, and includes a first stopper mechanism SM1 for restricting the rotation of the rotating member 50 in one direction and a second stopper mechanism SM2 for restricting the rotation of the rotating member 50 in the other direction. The first limit mechanism SM1 is constituted by a first rotation-side limit portion 50K1 and a first stationary-side limit portion 56K1, and the second limit mechanism SM2 is constituted by a second rotation-side limit portion 50K2 and a second stationary-side limit portion 56K 2.

The protruding portion 50E protrudes from an end portion (an end portion on the X2 side) of the first shaft portion 50V1 in a direction substantially orthogonal to the direction of the rotation axis 50X. Specifically, the protruding portion 50E includes a first protruding portion 50E1 protruding from the first shaft portion 50V1 in a first direction substantially orthogonal to the direction of the rotation axis 50X, and a second protruding portion 50E2 protruding from the first shaft portion 50V1 in a second direction (opposite to the first direction) substantially orthogonal to the direction of the rotation axis 50X. The first protruding portion 50E1 constitutes a rotation engagement portion RE.

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

The coil 52 is configured to be capable of exciting the magnetic member 54 and the core member 55. In the present embodiment, the coil 52 is configured such that a wire is wound around the core member 55.

The cylindrical member 53 is a member forming a side surface of the lens holding assembly LH. In the present embodiment, the cylindrical member 53 is formed of a nonmagnetic material such as austenitic stainless steel. In the illustrated example, the tubular member 53 includes a first receiving portion 53V1 rotatably supporting the first shaft portion 50V1 of the rotating member 50, and a second receiving portion 53V2 rotatably supporting the second shaft portion 50V2 of the rotating member 50. The cylindrical member 53 is configured to be able to house the coil 52, the magnetic member 54, and the core member 55.

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

The core member 55 is configured to function as a core of an electromagnet. In the illustrated example, the core member 55 is integrated with the left magnetic member 54L. The core member 55 is inserted into the center hole of the coil 52, and then the tip end portion thereof is bonded and fixed to the right magnetic member 54R. The coil 52 and the core member 55 are fixed by an adhesive.

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

The lower cover 57 is a member forming the lower surface of the lens holding assembly LH. In the present embodiment, the lower cover 57 is formed 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 in the side surface of the lower cover 57. A front protruding portion 57PF and a rear side collision portion 57PB protruding downward are formed on the lower surface of the lower cover 57 (see fig. 13). The front protruding portion 57PF is wound with the first end 52F of the coil 52, and the rear side collision portion 57PB is wound with the second end 52B of the coil 52.

Next, the movement of the lens holder assembly LH will be described with reference to fig. 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 when the lens holding unit LH that achieves the released state is viewed from the obliquely upper right front, and the upper right view of fig. 13 is a view when the lens holding unit LH that achieves the released state is viewed from the obliquely upper left rear. The lower left view of fig. 13 is a view when the lens holding unit LH that achieves the engaged state is viewed from the obliquely upper right front, and the lower right view of fig. 13 is a view when the lens holding unit LH that achieves the engaged state is viewed from the obliquely upper left rear. Fig. 14 is a front view of the constituent elements of the lens holding assembly LH. Specifically, the upper left and lower left of fig. 14 are front views of the components of the lens holding unit LH that achieve the engaged state, and the upper right and lower right of fig. 14 are front views of the components of the lens holding unit LH that achieve the released state. The upper left and right of fig. 14 are front views of components other than the tubular member 53, and the lower left and right of fig. 14 are front views of the magnet 51 and the magnetic member 54. Fig. 15 is a 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 (protruding portion 50E) in a virtual plane parallel to the YZ plane including the broken line CL3 shown in the left diagram of fig. 11. Further, a graph GH indicated by a two-dot chain line in fig. 15 shows a cross section of the lens holding assembly LH (the protruding portion 50E) in a virtual plane parallel to the YZ plane including the cut-off line CL4 shown in the right diagram of fig. 11.

The lens holding assembly LH is configured to be capable of rotating the rotating member 50 about 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 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 the S pole, and the right magnetic member 54R is magnetized to the N pole. In fig. 14, for clarity, a sparse cross pattern is labeled on a portion magnetized to the N pole, and a dense cross pattern is labeled on a portion magnetized to the S pole.

In this case, the rotary member 50 to which the magnet 51 is attached receives a rotational moment caused by the magnetic attraction force between the one side portion 51N (N pole) and the left side magnetic member 54L (S pole) and the magnetic attraction force between the other side portion 51S (S pole) and the right side magnetic member 54R (N pole). Accordingly, the rotating member 50 rotates about the rotation axis 50X toward the direction (clockwise) indicated by the arrow AR11 in the upper left drawing of fig. 14.

The first stopper SM1 restricts rotation of the rotating member 50 in the direction indicated by the arrow AR 11. Specifically, when the rotating member 50 rotates in the direction indicated by the arrow AR11, the first stationary-side stopper 56K1 provided on the upper cover 56 contacts the first rotating-side stopper 50K1 that is a part of the rotating member 50, and restricts further rotation of the rotating member 50. Hereinafter, a state in which the rotation of the rotating member 50 is regulated to the one direction side (the direction indicated by the arrow AR 11) by the first stationary-side regulating portion 56K1 is referred to as a "first regulation state".

In the first restriction 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 moment caused by the magnetic attraction force between the one side portion 51N (N pole) and the left side magnetic member 54L and the magnetic attraction force between the other side portion 51S (S pole) and the right side magnetic member 54R continues to act on the rotary member 50 to which the magnet 51 is mounted. The rotational moment can maintain the state in which the first rotation-side stopper 50K1 is pressed against the first stationary-side stopper 56K1, and suppresses the first rotation-side stopper 50K1 from rotating counterclockwise and separating from the first stationary-side stopper 56K 1.

In the example shown in the upper right and lower right 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 the N pole, and the right magnetic member 54R is magnetized to the S pole. In this case, the rotary member 50 to which the magnet 51 is attached receives a rotational moment caused by the magnetic attraction force between the one side portion 51N (N pole) and the right side magnetic member 54R (S pole) and the magnetic attraction force between the other side portion 51S (S pole) and the left side magnetic member 54L (N pole). Accordingly, the rotating member 50 rotates about the rotation axis 50X toward the direction (counterclockwise) indicated by the arrow AR12 in the upper right drawing of fig. 14.

The second stopper SM2 restricts rotation of the rotating member 50 in the direction indicated by the arrow AR 12. Specifically, the second stationary-side stopper 56K2 provided on the upper cover 56 contacts the second rotating-side stopper 50K2, which is a part of the rotating member 50, when the rotating member 50 rotates in the direction indicated by the arrow AR12, and restricts further rotation of the rotating member 50. Hereinafter, a state in which the rotation of the rotating member 50 is regulated to the other direction side (the direction indicated by the arrow AR 12) by the second stationary-side regulating portion 56K2 is referred to as a "second regulation state".

In the second restriction 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 moment caused by the magnetic attraction force between the one side portion 51N (N pole) and the right side magnetic member 54R and the magnetic attraction force between the other side portion 51S (S pole) and the left side magnetic member 54L continues to act on the rotary member 50 to which the magnet 51 is attached. The rotational moment can maintain the state in which the second rotation-side stopper 50K2 is pressed against the second stationary-side stopper 56K2, and suppresses the second rotation-side stopper 50K2 from rotating clockwise and separating from the second stationary-side stopper 56K 2.

As shown in fig. 15, the rotation member 50 is rotated counterclockwise about the rotation axis 50X by an angle θ with respect to the posture in the first restriction state, and becomes the posture in the second restriction state. As shown in fig. 15, the rotation engagement portion RE of the first protruding portion 50E1 as the rotation member 50 is engaged with the engagement portion EP, which is the accommodation space PK provided in the second magnet holder 7B, in the first restricted state. As shown in the graph GH of fig. 15, the rotation engagement portion RE is disengaged from the engagement portion EP in the second restricted state. The rotation angle of the rotation engagement portion RE is the same as the rotation angle of the rotation member 50 (stationary-side restriction portion 56K). In the illustrated example, the angle θ, which is the angle at which the rotating member 50 can rotate, is set to 80 degrees, but may be an angle larger than 80 degrees or an angle smaller than 80 degrees. In order to ensure reliable engagement, the angle θ is preferably 70 degrees or more and 90 degrees or less.

The housing space PK is a portion provided in the second magnet holder 7B and defining a space capable of receiving the rotation engagement portion RE. In the illustrated example, as shown in the left view of fig. 11, the accommodation space PK is a through hole defined by the wall portion WP and penetrating the second magnet holder 7B in the Y-axis direction. However, the accommodation space PK may be a hole or a notch. Specifically, the hole is, for example, a recess that opens to the right side surface of the second magnet holder 7B and that is recessed in the left direction without penetrating the second magnet holder 7B in the Y-axis direction. The notch is, for example, a notch that opens to the right side surface and the upper surface of the second magnet holder 7B, respectively, and is recessed in the left direction. The notch may be formed to open to the right side surface, the upper surface, and the left side surface of the second magnet holder 7B.

In the illustrated example, as shown in fig. 11, the wall portion WP includes a front side wall portion WPF and a rear side wall portion WPB. In the first restricted state, the movement of the second magnet holder 7B in the rear direction (X2 direction) is restricted by the front surface of the rotation engagement portion RE coming into contact with the front side wall portion WPF that divides the accommodation space portion PK. In the first restricted state, the movement of the second magnet holder 7B in the forward direction (X1 direction) is restricted by the rear surface of the rotation engagement portion RE coming into contact with the rear side wall portion WPB that divides the accommodation space portion PK.

On the other hand, in the second restriction state, the movement of the second magnet holder 7B in the forward direction (X1 direction) or the backward direction (X2 direction) is not restricted by the holding mechanism HM. As shown in the right view of fig. 11, this is because the wall portion WP does not contact the rotation engagement portion RE even when the second magnet holder 7B moves in the X-axis direction.

Further, as shown in fig. 15, the wall portion WP includes an upper side wall portion WPU and a lower side wall portion WPD. The rotation engagement portion RE does not contact with either the upper side wall portion WPU or the lower side wall portion WPD in the second restriction state shown by the graph GH, even in the first restriction state. Specifically, the first stopper mechanism SM1 stops the clockwise rotation of the rotating member 50 about the rotation axis 50X with a gap GP5 being provided between the upper end of the rotation engagement portion RE and the upper side wall portion WPU.

In the first restricting state, the configuration in which the gap GP5 is secured between the upper end of the rotation engagement portion RE and the upper side wall portion WPU has an effect that the locked state can be suppressed from being undesirably released, as compared with the configuration in which the upper end of the rotation engagement portion RE contacts the upper side wall portion WPU in the first restricting state. This is because if the upper end of the rotation engagement portion RE contacts the upper side wall portion WPU in the first restricted state, the rotation engagement portion RE may be sprung out by a sudden displacement of the upper side wall portion WPU when an impact due to dropping or the like is received. The amount of engagement between the engagement portion EP and the rotation engagement portion RE (the contact area between the first protruding portion 50E1 and the front side wall portion WPF) is substantially the same regardless of the gap GP 5. Therefore, the configuration of ensuring the gap GP5 is not easier to be unlocked than the configuration of not ensuring the gap GP5 from the viewpoint of the engagement amount.

In the illustrated example, as shown in fig. 15, the rotary member 50 to which the magnet 51 is fixed is configured such that the position of the center of gravity thereof exists in the region ZN in the main view. The circular region ZN indicated by a broken line in fig. 15 is a region within the outer contour of the first shaft portion 50V1 and within the outer contour of the second shaft portion 50V2 in front view (in the case of viewing 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, and therefore, the contour of the region ZN shown in fig. 15 corresponds to the outer contour of the second shaft portion 50V 2. Desirably, the rotating member 50 in a state where the magnet 51 is fixed is configured such that the position of the center of gravity thereof exists in the region ZN and is close to the rotation axis 50X in the main view. More preferably, the rotating member 50 to which the magnet 51 is fixed is configured such that the position of the center of gravity thereof coincides with the position of the rotation axis 50X in the main view.

According to this configuration, the lens holding unit LH can suppress the rotation member 50 from being undesirably rotated when an impact due to dropping or the like is applied. This is because the greater the separation between the position of the center of gravity of the rotating member 50 with the magnet 51 fixed and the rotation axis 50X, the greater the rotation moment due to the weight thereof.

Here, the positional relationship between the second magnet holder 7B and the coil holder 5 will be described with reference to fig. 10 again. As shown in fig. 10, the second magnet holder 7B has an upper limit portion TU and a lower limit portion TD for limiting the amount of movement when the second magnet holder is vibrated in the up-down direction (Z-axis direction) by an impact such as a drop.

In the illustrated example, the lower stopper TD is provided so as to contact 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 (portion where the engaging portion EP is provided) of the second magnet holder 7B moves downward. With this configuration, the lower stopper TD can restrict the amount of movement of the second magnet holder 7B downward of the front portion.

The upper limit portion TU is provided so as to contact the lower surface (ceiling surface) of the upper surface portion 1B of the cover member 1 when the front portion (portion where the engaging portion EP is provided) of the second magnet holder 7B moves upward. With this configuration, the upper limit portion TU can limit the amount of movement of the second magnet holder 7B upward of the front portion. In fig. 10, for the sake of explanation, the lower surface (ceiling surface) of the upper surface portion 1B of the cover member 1 is indicated by a one-dot chain line.

The coil holder 5 and the second magnet holder 7B are configured such that the size of the gap GP3 between the lower limit portion TD and the bottom wall portion 5B of the coil holder 5 changes according to 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 such 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. The movement limit position of the second magnet holder 7B on the front side means that the second lens holder 3B is in the movement limit position on the front side. Specifically, the upper surface (inner bottom surface) of the bottom wall portion 5B of the coil holder 5 is configured to have a higher height at a portion facing the lower stopper portion TD in the upper view of fig. 10 than at a portion facing the lower stopper portion TD in the lower view of fig. 10.

On the other hand, the cover member 1 and the second magnet holder 7B are configured such that the size of the gap GP4 between the upper limit 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 example shown in the figure, the cover member 1 and the second magnet holder 7B are configured such that the size GP4A of the gap GP4 when the second magnet holder 7B is at the front movement limit position is identical to the size GP4B of the gap GP4 when the second magnet holder 7B is not at the front movement limit position.

According to the above-described configuration, in the lens holder driving device 100, the amount of movement in the up-down direction of the second magnet holder 7B caused by the impact or the like received in the first limit state can be reduced as compared with the case where the second magnet holder 7B is not in the front-side movement limit position. Therefore, the lens holder driving device 100 can suppress the engagement of the engagement portion EP with the rotation engagement portion RE from being undesirably released due to an impact or the like received in the first restriction state.

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

Next, the mounting of the lens holder assembly LH to the coil holder 5 will be described with reference to fig. 16 and 17. Fig. 16 is a plan view of a part (right front corner) of the coil holder 5, and corresponds to an enlarged view of a range R2 surrounded by a broken line shown in fig. 9. Specifically, the upper view of fig. 16 is a plan view of the corner of the right front side of the coil holder 5 before the lens holder assembly LH is mounted. The center view of fig. 16 is a plan view of the corner of the right front side of the coil holder 5 after the lens holding assembly LH is mounted. The lower view of fig. 16 is a plan view of the right front corner of the coil holder 5 after the adhesive BD3 is further applied. Fig. 17 is a perspective view of the lens holding assembly LH to which the adhesive BD3 is attached, showing a state of the lens holding assembly LH in the lower view of fig. 16. Specifically, the upper view of fig. 17 is a view when the lens holding unit LH to which the adhesive BD3 is attached is viewed from the obliquely upper front right. The lower view of fig. 17 is a view of the lens holder LH to which the adhesive BD3 is attached, when viewed obliquely from the right, upper rear.

First, as shown in the upper diagram of fig. 16, the lens holding assembly LH is fitted into a recess 5U provided in the corner of the right front side of the coil holder 5. In fig. 16, the concave portion 5U is marked with a cross pattern for clarity.

Specifically, the recess 5U includes a first recess 5U1 in which the housing CB of the lens holding assembly LH is accommodated, a second recess 5U2 in which the stationary-side restricting portion 56K of the upper cover 56 is accommodated, and a third recess 5U3 in which the first shaft portion 50V1 of the shaft portion 50V is accommodated. Further, crush ribs 5C, contact portions 5T, and grooves 5G are provided on the side walls defining the concave portions 5U. In fig. 16, although not shown for clarity, the fourth portion 94 of the printed wiring board 9 is disposed before the lens holding unit LH is accommodated in the bottom of the first concave portion 5U 1.

The crush rib 5C is a portion crushed to be closely attached to the lens holding unit LH when the lens holding unit 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 contacts the housing CB when the lens holding assembly LH is fitted into the recess 5U. In the example shown in the drawing, the contact portion 5T is a planar portion configured to contact a side surface of the housing CB, and includes first to third contact portions 5T1 to 5T3. Specifically, as shown in the central view of fig. 16, the first contact portion 5T1 is arranged to contact the right side surface (Y2 side surface) of the housing CB, and the second contact portion 5T2 and the third contact portion 5T3 are arranged to contact the front side surface (X1 side surface) of the housing CB. The first crush rib 5C1 is disposed in contact with the rear side surface (surface on the X2 side) of the case CB, and the second crush rib 5C2 is disposed in contact with the left side surface (surface on the Y1 side) of the case CB.

The groove 5G is configured to prevent the adhesive BD3 from flowing into the second recess 5U2 and the third recess 5U3, respectively, when the adhesive BD3 is applied to the lens holding unit LH fitted into the recess 5U. In the illustrated example, the grooves 5G include first to third grooves 5G1 to 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 housing CB and the inner wall surface of the first concave portion 5U1, which exceeds the first crush rib 5C1 and enters the third concave portion 5U 3. The second groove 5G2 is a groove for receiving a portion of the adhesive BD3 applied between the right side surface of the housing CB and the inner wall surface of the first recess 5U1, which exceeds the second contact portion 5T2 and is to be entered into the second recess 5U 2. The third groove 5G3 is a groove for receiving a portion of the adhesive BD3 applied between the left front corner of the housing CB and the inner wall surface of the first concave portion 5U1, which exceeds the third contact portion 5T3 and is to be entered into the second concave portion 5U 2.

The above-described configuration can prevent the adhesive BD3 from entering the second concave portion 5U2, and adhere and cure between the rotation-side restriction portion 50K and the housing CB, thereby preventing the rotation of the rotation-side restriction portion 50K (the rotation member 50). In addition, the above-described configuration can prevent the adhesive BD3 from entering the third recess 5U3, and adhere and cure between the first shaft portion 50V1 and the housing CB, thereby preventing the rotation of the first shaft portion 50V1 (the rotating member 50).

Specifically, as shown in fig. 17, the adhesive BD3 applied to the lens holding assembly LH fitted into the recess 5U adheres to the tubular member 53, the upper cover 56, and the lower cover 57 constituting the housing CB and is cured, but does not adhere to the rotary member 50.

Next, details of the printed wiring board 9 will be described with reference to fig. 18 to 20. Fig. 18 is a perspective view of the printed wiring board 9 mounted on the base member BM. Specifically, the upper view of fig. 18 is a perspective view of the substrate 2, the coil block 4, the coil holder 5, and the printed wiring board 9. The lower view of fig. 18 is a perspective view of the substrate 2, the coil holder 5, and the printed wiring board 9, and shows a state after the coil block 4 is removed from the configuration shown in the upper view of fig. 18. Fig. 19 is a plan view and a front view of the printed wiring board 9. Specifically, the upper view of fig. 19 is a plan view of the printed wiring board 9, and the center view of fig. 19 is a front view of the printed wiring board 9. The lower view of fig. 19 is a front view of a part of the printed wiring board 9, and corresponds to an enlarged view of a range R3 surrounded by a broken line shown in the center view of fig. 19. Fig. 20 is a perspective view of a part of the printed wiring board 9 mounted on the base member BM. Specifically, the upper diagram of fig. 20 corresponds to an enlarged diagram of the range R4 shown by the broken line in fig. 18. The center of fig. 20 illustrates a state in which the conductor pattern of the printed wiring board 9 illustrated in the upper diagram of fig. 20 is connected to the right-side coil group 42R by the bonding material SD. The lower view of fig. 20 shows a state in which the adhesive BD2 is applied to the first right portion 91R of the printed wiring board 9 shown in the central view of fig. 20. In the center view and the lower view of fig. 20, the right substrate 41R is omitted for clarity. In the lower drawing of fig. 20, the adhesive BD2 is marked with a cross pattern for clarity.

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

Specifically, as shown in the lower view 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 view of fig. 19). The first portion 91, the third portion 93, and the fourth portion 94 are disposed in the housing portion SP, and the second portion 92 is disposed outside the housing portion SP. The housing portion SP includes portions located at the notch portions CU (left notch portion CUL and right notch portion CUR). The first portion 91 is disposed at a position corresponding to the notch CU.

More specifically, the first portion 91 is a portion disposed immediately below the coil block 4, and includes a first left portion 91L having a conductor pattern connected to the left coil block 42L, and a first right portion 91R having a conductor pattern connected to the right coil block 42R. The second portion 92 has a second left portion 92L adjoining the first left portion 91L, and a second right portion 92R adjoining 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 of the coil 52 to which the electromagnetic mechanism EM is connected. Specifically, as shown in the upper drawing of fig. 19, a fifth conductor pattern PT5 that is conductively connected to both ends of the coil 52 constituting the electromagnetic mechanism EM included in the lens holding unit LH is formed on the lower surface (Z2-side surface) of the fourth portion 94 by a conductive adhesive material, solder, or the like. More specifically, a fifth conductor pattern PT5F that is conductively connected to the first end 52F of the coil 52 and a fifth conductor pattern PT5B that is conductively connected to the second end 52B of the coil 52 are formed on the lower surface (Z2-side surface) of the fourth portion 94.

Here, details of the first right side portion 91R and the second right side portion 92R will be described with reference to fig. 20. The following description with reference to fig. 20 is also applicable to the first left portion 91L and the second left portion 92L having substantially the same configuration.

In the illustrated example, as shown in the upper diagram of fig. 20, the first right portion 91R includes six first conductor patterns PT1 (first conductor patterns PT1a to PT1 f). The first conductor pattern PT1 is formed to improve the adhesion strength between the printed wiring board 9 and the adhesive BD 2. Therefore, the first conductor pattern PT1 is not conductively connected to other members, and is covered with the adhesive BD2 as shown in the lower diagram of fig. 20. In addition, the wettability of the surface of the conductor pattern formed of metal is higher than that of the surface of the printed wiring substrate 9 formed 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 BD 2. Further, the higher the adhesive strength, the less frequently the adhesive BD2 is peeled off from the printed wiring board 9 when an impact due to dropping or the like is received.

Further, as shown in the upper diagram of fig. 20, the first right side portion 91R includes a second conductor pattern PT2 connected to one end of the coil constituting the right side coil group 42R, and a third conductor pattern PT3 connected to the other end of the coil constituting the right side coil group 42R. Specifically, the first right side portion 91R includes a second conductor pattern PT2a connected to one end of the first right side coil 42R1, a third conductor pattern PT3a connected to the other end of the first right side coil 42R1, a second conductor pattern PT2b connected to one end of the second right side coil 42R2, and a third conductor pattern PT3b connected to the other end of the second right side coil 42R 2.

Specifically, as shown in the central view of fig. 20, the first right-side coil 42R1 has a first end portion TM1 (first end portion TM 11) as one end thereof connected to the second conductor pattern PT2a by conduction through the first bonding material SD1 (first bonding material SD 11), and a second end portion TM2 (second end portion TM 21) as the other end thereof connected to the third conductor pattern PT3a by conduction through the second bonding material SD2 (second bonding material SD 21). As shown in the central view of fig. 20, the first end portion TM1 (first end portion TM 12) of the second right-side coil 42R2 is connected to the second conductor pattern PT2b by the first bonding material SD1 (first bonding material SD 12), and the second end portion TM2 (second end portion TM 22) is connected to the third conductor pattern PT3b by the second bonding material SD2 (second bonding material SD 22). The bonding material SD including the first bonding material SD1 and the second bonding material SD2 is, for example, a conductive adhesive material.

Two first conductor patterns PT1 (first conductor pattern PT1a and first conductor pattern PT1 b) are arranged between the second conductor pattern PT2a and the third conductor pattern PT3a with a space therebetween. Further, two first conductor patterns PT1 (first conductor patterns PT1e and PT1 f) are arranged between the second conductor pattern PT2b and the third conductor pattern PT3b with a gap therebetween. Further, two first conductor patterns PT1 (first conductor pattern PT1c and first conductor pattern PT1 d) are also arranged with a space between the third conductor pattern PT3a and the second conductor pattern PT2 b.

The arrangement of the first conductor pattern PT1 as described above has the effect of suppressing the short circuit of the end portions TM of the first right-side coil 42R1 and the second right-side coil 42R2 by the bonding material SD.

For example, even if the first bonding material SD11, which conductively connects the first end TM11 of the first right coil 42R1 to the second conductor pattern PT2a, is in contact with the first conductor pattern PT1a, and further the second bonding material SD21, which conductively connects the second end TM21 of the first right coil 42R1 to the third conductor pattern PT3a, is in contact with the first conductor pattern PT1b, the first conductor pattern PT1a and the first conductor pattern PT1b are arranged at a distance from each other, and therefore the first end TM11 and the second end TM21 of the first right coil 42R1 are not shorted.

In the illustrated example, as shown in the upper drawing of fig. 20, the coil holder 5 has an enclosure portion EN (first to sixth enclosure portions EN1 to EN 6) formed integrally with the side wall portion SW so as to enclose three of four sides around each of the second conductor pattern PT2 and the third conductor pattern PT 3. The surrounding portion EN has an effect that, when the bonding material SD having fluidity is applied to the conductor pattern, the bonding material SD can be prevented from undesirably spreading. Therefore, the configuration having the surrounding portion EN has an effect that it becomes easy to use an assembling method in which the right coil component 4R is fitted into the right notch portion CUR of 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 substrate 9. Further, if such an assembling method is adopted, it is not necessary to insert the tip of a needle for applying the bonding material SD into the gap between the first right side portion 91R of the printed wiring board 9 and the right side substrate 41R of the right side coil assembly 4R. As a result, occurrence of defects such as breakage of the coil due to contact between the needle and the coil is suppressed. This configuration can thus achieve the effect of improving the operability associated with the application of the bonding material SD and the reliability of the contact between the end TM of the coil and the bonding material SD (conductor pattern).

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

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

After the first right-side coil 42R1 and the second right-side coil 42R2 are connected to the conductor pattern by the bonding material SD and the right-side substrate 41R supporting the first right-side coil 42R1 and the second right-side coil 42R2 is bonded and fixed to the fourth side wall portion 5A4 of the coil holder 5, as shown in the lower diagram of fig. 20, the adhesive BD2 is applied to the first right-side portion 91R. In fact, as shown in the upper drawing of fig. 18, the adhesive BD2 is applied so as to fill the gap between the right substrate 41R of the right coil component 4R fitted in the right cutout portion CUR of the fourth side wall portion 5A4 of the coil holder 5 and the first right portion 91R of the printed wiring substrate 9. That is, the gap between the substrate 41 and the first portion 91 is sealed with the adhesive BD2. In the illustrated example, the first bonding material SD1 and the second bonding material SD2 are completely covered with the adhesive BD2, and the first conductor pattern PT1 is also completely covered. This configuration has the effect of improving the adhesive strength between the right coil assembly 4R (right substrate 41R), the coil holder 5, and the printed wiring board 9 (first right portion 91R). Further, this configuration has an effect of improving the insulation between the end portions TM of the first right-side coil 42R1 and the second right-side coil 42R 2.

As shown in the lower view of fig. 19, the printed wiring board 9 is configured to have a step ST between the upper surface (surface on the Z1 side) of the first right portion 91R and the upper surface (surface on the Z1 side) of the second right portion 92R. Specifically, the printed wiring board 9 is a multilayer board in which a plurality of layers are laminated, and 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 composed of four layers, and the second right portion 92R is composed of two layers. The number of layers of the first right portion 91R is typically larger than the number of layers of the second right portion 92R, but may be equal to or smaller than the number of layers of the second right portion 92R. Further, at least one of the first right side portion 91R and the second right side portion 92R may be constituted by one layer.

Further, as shown in the lower diagram of fig. 19, the first right side portion 91R has a thickness TK1 larger than the thickness TK2 of the second right side portion 92R. However, the thickness TK1 of the first right portion 91R may be equal to or less than the thickness TK2 of the second right portion 92R.

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

The configuration having such a step ST has the effect that the bonding material SD and the adhesive BD2 can be suppressed from spreading from the first right portion 91R to the second right portion 92R. This is because the bonding material SD reaching the step ST is suppressed from entering the second right portion 92R by the surface tension of the adhesive BD 2. Further, a recess that functions as an adhesive reservoir may be provided at an end of the step ST. This is because the bonding material SD or the adhesive BD2 can be further suppressed from spreading from the first right portion 91R to the second right portion 92R by receiving the bonding material SD or the adhesive BD2 spreading along the step ST.

Next, control of the lens holder driving device 100 mounted on the portable device with a camera will be described with reference to fig. 21. Fig. 21 is a block diagram showing a configuration example of the control system SYS for controlling the lens holder driving device 100.

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

The control system SYS includes an input device ID, a control device CTR, and a power supply CS, which are disposed outside the lens holder driving device 100, as constituent elements.

The input device ID is a device for receiving an input to the control device CTR. In the example shown in fig. 21, the input device ID is a touch panel provided in a portable device with a camera.

The control device CTR is configured to be able to control the power supply CS that can supply 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 supply CS based on information from the input device ID, the left magnetic sensor 18L, the right magnetic sensor 18R, and the like.

The power supply CS is configured to be capable of supplying currents to the first and second left coils 42L1 and 42L2 of the left coil group 42L, the first and second right coils 42R1 and 42R2 of the right coil group 42R, and the coil 52 of the lens holding assembly LH, respectively.

In the example shown in fig. 21, the control device CTR can supply a current of an appropriate magnitude to each component at an appropriate timing by controlling the power supply CS by PWM control or the like. Specifically, the control device CTR, for example, upon receiving a camera start signal from the input device ID, performs PWM control on the power supply CS, and thereby supplies current to the coil 52 of the lens holding assembly LH.

The camera activation signal is a signal for activating a camera mounted on a portable device with a camera. In the example shown in fig. 21, when a camera icon displayed on a touch panel display mounted on a portable device with a camera is touched, a camera start signal is outputted through the touch panel as an input device ID.

When current is supplied from the power supply CS, the coil 52 of the lens holding assembly LH rotates the rotating member 50 about the rotation axis 50X toward the direction indicated by the arrow AR12 (counterclockwise), as shown in fig. 14. 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 bring the state (engaged state) in which the engaging portion EP is engaged with the rotating engaging portion RE as shown in the left drawing of fig. 11 into the state in which the engaging portion EP is disengaged (engaged) from the rotating engaging portion RE as shown in the right drawing of fig. 11. By this release, the second lens holder 3B can be freely moved in the optical axis direction, and as a result, the first lens holder 3F can also be freely moved in the optical axis direction.

Then, the control device CTR can supply a forward current to the first right coil 42R1 of the right coil set 42R by PWM-controlling the power supply CS. When the first right coil 42R1 receives a forward current from the power supply CS, the first right magnet 6R1 can be attracted by the magnetic force generated by the first right coil 42R1 and the second right magnet 6R2 can be moved rearward. As a result, the control device CTR can move the second lens holder 3B (second lens body LS 2) rearward (in the X2 direction) at 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 the reverse current to the first right-side coil 42R1 by PWM-controlling the power supply CS. When the first right coil 42R1 receives a reverse current from the power supply CS, the first right magnet 6R1 can be moved rearward by the magnetic force generated by the first right coil 42R 1. Further, the control device CTR can supply the reverse current to the second right-side coil 42R2 by PWM-controlling the power supply CS. When the second right coil 42R2 receives a reverse current supply from the power supply CS, the second right magnet 6R2 can be attracted by the magnetic force generated by the second right coil 42R 2. As a result, the control device CTR can further move the second lens holder 3B (second lens body LS 2) at the position shown in the central diagram of fig. 7 to the position shown in the lower diagram of fig. 7 in the rear direction (X2 direction).

The same control is performed by the control device CTR when the second lens holder 3B (second lens body LS 2) is moved forward, when the first lens holder 3F (first lens body LS 1) is moved backward, and when the first lens holder 3F (first lens body LS 1) is moved forward.

The control device CTR can specify the position of the left magnet 6L (the first lens holder 3F) based on the output of the left magnetic sensor 18L. Therefore, when the first lens body LS1 (the first lens holder 3F) is moved 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 constituting the left coil group 42L based on the output of the left magnetic sensor 18L.

Similarly, the control device CTR can specify the position of the right magnet 6R (the second lens holder 3B) based on the output of the right magnetic sensor 18R. Therefore, when the second lens body LS2 (second lens holder 3B) is moved in the optical axis direction, the control device CTR can feedback-control the direction and magnitude of the currents supplied to the first right coil 42R1 and the second right coil 42R2 constituting the right coil group 42R based on the output of the right magnetic sensor 18R.

After that, when receiving the camera stop signal from the input device ID, the control device CTR performs PWM control on the power supply CS, and thereby can move the first lens body LS1 (the first lens holder 3F) and the second lens body LS2 (the second lens holder 3B) to the movement limit positions on the front side.

The camera stop signal is a signal for stopping the function of the camera mounted on the portable device with a camera. In the example shown in fig. 21, when a software button (icon) for stopping a function of a camera, which is displayed on a touch panel display mounted on a portable device with a camera, is touched, a camera stop signal is outputted through the touch panel as an input device ID.

After the first lens holder 3F is moved to the movement limit position on the front side and the second lens holder 3B is moved to the movement limit position on the front side, the control device CTR supplies a current in the opposite direction to that when the camera start signal is received to the coil 52 of the lens holding assembly LH.

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

When a reverse current is supplied from the power supply CS, the coil 52 of the lens holding assembly LH rotates the rotating member 50 about the rotation axis 50X in the direction indicated by the arrow AR11 (clockwise) 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 bring the state in which the engagement (engagement) between the engagement portion EP and the rotation engagement portion RE is released as shown in the right drawing of fig. 11 into the state (engaged state) in which the engagement portion EP and the rotation engagement portion RE are engaged as shown in the left drawing of fig. 11. By 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 the control described above, the control device CTR can switch the state (locked state) in which the engagement portion EP is engaged with the rotation engagement portion RE to the state (unlocked state) in which the engagement of the engagement portion EP with the rotation engagement portion RE is released, and conversely can switch the unlocked state to the locked state. Further, the control device CTR can move the first lens holder 3F and the second lens holder 3B individually in the optical axis direction.

As described above, as shown in fig. 3, the lens holder driving device 100 according to the embodiment of the present application includes the fixing side member FB (the substrate 2 and the coil holder 5) having the bottom plate portion BP (the fixing side metal plate portion 2B and the bottom wall portion 5B), the lens holder 3 capable of holding the lens body LS, the guide mechanism GM for guiding the lens holder 3 so as to be movable along the bottom plate portion BP in the optical axis direction (the X axis direction), and the driving portion DM for moving the lens holder 3 in the optical axis direction (the X axis direction). As shown in fig. 5, the lens holder 3 has a bottom portion BT that is opened upward and faces the bottom plate portion BP. At least the bottom BT of the portion where the lens LS is disposed is constituted by the movable-side metal plate portion 32. This configuration has the effect of being able to reduce the height dimension of the lens holder driving device 100, compared to the case where the entirety of the lens holder 3 is formed of a material other than metal, such as synthetic resin. That is, this configuration has an effect that the height of the lens holder driving device 100 can be reduced.

The bottom plate portion BP may be configured to have a fixed-side metal plate portion 2B facing the movable-side metal plate portion 32. For example, as shown in fig. 3, the bottom plate portion BP may have at least a fixed-side metal plate portion 2B opposed to the movable-side metal plate portion 32 over the entire movement range of the lens holder 3. This configuration has the effect of enabling the height dimension of the lens holder driving device 100 to be reduced, compared with the case where the entire substrate 2 is formed of a material other than metal, such as synthetic resin. That is, this configuration has the effect that the lens holder driving device 100 can be further reduced in height.

As shown in fig. 5, the lens holder 3 may have a pair of side wall portions 30 provided so as to face each other in a direction (Y-axis direction) intersecting the optical axis direction (X-axis direction) so as to be separated from each other. The pair of side wall portions 30 may be made of synthetic resin integrated with the movable-side metal plate portion 32. As shown in fig. 6, the movable-side metal plate portion 32 may have a base portion BS forming the bottom portion BT, and a bent portion FP bent from the base portion BS and embedded in the side wall portion 30. This structure has the effect of improving the strength of the lens holder 3 as compared with a structure having no bending portion FP.

As shown in fig. 6, the bending portion FP may have an adhesive portion AD exposed on the surface of the side wall portion 30 and fixed to the lens body LS with an adhesive. This configuration has the effect of improving the adhesive strength between the lens body LS and the lens holder 3.

Further, a plurality of convex portions or concave portions may be formed on the surface of the adhesive portion AD. In the example shown in fig. 6, a plurality of concave portions are formed on the surface of the adhesive portion AD. This configuration has the effect of further improving the adhesive strength between the lens body LS and the lens holder 3.

Further, the bending portion FP may be bent from the base BS a plurality of times, and has: a first bending part FP1 bending upward from the base BS; and a second bending part FP2 having a plate surface substantially parallel to the plate surface of the base BS. In this case, the adhesive portion AD may be provided at least at the second bending portion FP2. In the example shown in fig. 6, the first bending portion FP1 of the front movable-side metal plate portion 32F includes the fourth portion 32F4, and the second bending portion FP2 of the front movable-side metal plate portion 32F includes the third portion 32F3 and the ninth portion 32F9. The third portion 32F3 and the ninth portion 32F9 are provided with an adhesive portion AD. The same applies to the rear movable-side metal plate portion 32B. This configuration has the effect of exposing the adhesive portion AD on the upper surface of the side wall portion 30. Further, this configuration has an effect that the strength of the lens holder 3 can be improved as compared with a configuration without the second bending portion FP2.

The guide mechanism GM may be constituted by two shafts 8 (see fig. 3) provided in parallel to each other on the fixed side member FB, and a through portion TH (see fig. 5) provided in the lens holder 3 through which the shaft 8 is inserted. As shown in fig. 5, the through portions TH may be formed in the pair of side wall portions 30. As shown in fig. 5, the through portion TH is desirably located between the lower surface of the bottom portion BT and the upper surface of the side wall portion 30. This is to reduce the height of the lens holder driving device 100. This structure has the advantage of simple structure and high assembling property as compared with the case of using the ball as the guide mechanism GM.

As shown in fig. 5, the lens holder 3 may have a magnetic field generating member 15. As shown in fig. 3, the fixed-side member FB (printed wiring board 9) may have a magnetic sensor 18 that detects the magnetic field from the magnetic field generating member 15. As shown in fig. 8, at least a part of the magnetic field generating member 15 may be fixed to the movable-side metal plate portion 32 via an adhesive BD 1. This configuration has the effect of improving the adhesive strength between the magnetic field generating member 15 and the lens holder 3.

As shown in fig. 3, the lens holder driving device 100 according to the embodiment of the present application includes a fixing-side 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 engaging portion EP provided on the movable side member MB including the lens holder 3, a rotation engaging portion RE rotatable to be engaged with the engaging portion EP, and a rotation driving portion (lens holding unit LH) including an electromagnetic mechanism EM configured to rotate the rotation engaging portion RE with the magnet 51 and the coil 52. The rotation driving unit (lens holding unit LH) includes a rotation member 50 to which the magnet 51 or the coil 52 is fixed, and a receiving portion 53V rotatably supporting the rotation member 50. The rotation engagement portion RE is provided integrally with the rotating member 50. In the example shown in fig. 12, the lens holding unit LH includes a rotary member 50 to which a magnet 51 is fixed, and a receiving portion 53V rotatably supporting the rotary member 50. The rotation engagement portion RE is constituted by the first protruding portion 50E1 of the rotation member 50, and is integrally formed with the rotation member 50. However, the rotary engagement portion RE and the rotary member 50 may be formed of separate members and may be integrated by an adhesive. In this configuration, the rotation engagement portion RE is integrally provided with the rotating member 50, and thus gears and the like are not required. Therefore, this configuration has the effect that the lens holder driving device 100 can be prevented from being enlarged and further reduced in size.

The holding mechanism HM may have a restricting portion (a restricting mechanism SM) that restricts the rotation range of the rotating member 50. This configuration provides an effect of reliably engaging the engaging portion EP with the rotating engaging portion RE by appropriately setting the restricting portion (the restricting mechanism SM). That is, this configuration has an effect that the rotating member 50 can be prevented from rotating excessively, and the engagement can be released undesirably.

The electromagnetic mechanism EM may be an electromagnet. Specifically, as shown in fig. 12, the lens holding unit LH may include a magnet 51 fixed to the rotating member 50, a pair of magnetic members 54 disposed to face each other with the magnet 51 interposed therebetween, a core member 55 provided so as to connect the pair of magnetic members 54, and a coil 52 provided around the core member 55. In this case, as shown in fig. 14, the magnet 51 may have different magnetic poles in one side portion 51N located on one side and the 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, 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 unit LH may be configured to magnetize the pair of magnetic members 54 by a current flowing through the coil 52, and to rotate the rotating member 50 by a magnetic force generated between the magnetic members 54 and the magnet 51. The rotation axis 50X of the rotation member 50 extends in the X-axis direction perpendicular to the direction (Y-axis direction) in which the pair of magnetic members 54 face each other. This configuration has the effect of simplifying the configuration of the rotation driving unit (lens holding unit LH).

The regulating portion (regulating mechanism SM) may include a first stationary-side regulating portion 56K1 for regulating the rotation of the rotating member 50 in one direction and a second stationary-side regulating portion 56K2 for regulating the rotation of the rotating member 50 in the other direction. In this case, a magnetic force for rotating the rotary member 50 in one direction (in the direction indicated by the arrow AR 11) may be applied between the magnet 51 and the pair of magnetic members 54 in a first regulation state in which the rotation of the rotary member 50 in one direction (in the direction indicated by the arrow AR 11) is regulated by the first stationary-side regulating portion 56K1, and in a state in which the current does not flow through the coil 52. In the second regulation state in which the rotation of the rotary member 50 to the other direction side (the direction indicated by the arrow AR 12) is regulated by the second stationary side regulating portion 56K2, a magnetic force for rotating the rotary member 50 to the other direction side (the direction indicated by the arrow AR 12) may be applied between the magnet 51 and the pair of magnetic members 54 in a state in which the current does not flow through the coil 52. This configuration has the effect that even when an impact due to dropping or the like is applied when no current is supplied to the coil 52, the engaged state (locked state) is hardly released.

As shown in fig. 14, the lens holding unit LH may be configured such that, with respect to a first virtual plane VP1 that is parallel to a direction (Y-axis direction) in which the pair of magnetic members 54 (the left magnetic member 54L and the right magnetic member 54R) face each other via the magnet 51 and that includes the rotation axis 50X of the rotating member 50, in a first limit state (see lower left view in fig. 14) and in a second limit state (see lower right view in fig. 14), the plane 50P of the magnet 51 is inclined toward different directions from each other, and in a state in which the second virtual plane VP2 that is perpendicular to the first virtual plane VP1 and includes the rotation axis 50X passes through the plane 50P in the middle of switching from the first limit state to the second limit state. This configuration has the effect of realizing switching between the first limit state and the second limit state with a simple configuration using the magnet 51 and the magnetic member 54. Further, this configuration has the effect that the function of maintaining the first limit state and the second limit state can be simply configured even if the current does not flow through the coil 52. The angle θ1 between the first virtual plane VP1 and the plane 50P in the first limiting state is an acute angle, and the angle θ2 between the first virtual plane VP1 and the plane 50P in the second limiting state is an acute angle. The angles θ1 and θ2 are preferably 30 degrees to 50 degrees, respectively. The sum of the angle θ1 and the angle θ2 is preferably 70 degrees or more and 90 degrees or less.

As shown in fig. 12, the lens holding unit LH may have a case CB that accommodates the pair of magnetic members 54, the core member 55, and the coil 52 and has a receiving portion 53V. The restricting portion (the restricting mechanism SM, the stationary-side restricting portion 56K) may be provided integrally with the housing CB constituting the stationary-side member FB. This structure has an effect that the engagement state (lock state) is less likely to be undesirably released when an impact due to dropping or the like is received, as compared with a case where the restricting portion (stopper SM) is provided in the movable side member MB such as the lens holder 3 (second magnet holder 7B), for example.

As shown in fig. 3, the movable-side member MB may include an engagement member (second magnet holder 7B) having an engagement portion EP formed thereon. In this case, as shown in fig. 11 and 15, the engaging portion EP may be constituted by a housing space PK (through hole, hole or notch) into which the rotation engaging portion RE enters. As shown in fig. 15, in the first restricted state, the rotation engagement portion RE may be engaged with the engagement portion EP in a state where a gap GP5 is provided between the wall portion WP forming the accommodation space PK (through hole, hole or notch) and the rotation engagement portion RE in the rotation direction of the rotation engagement portion RE. This configuration brings about an effect that the engagement state (lock state) can be further suppressed from being undesirably released when an impact due to falling or the like is received. This is because the rotation engagement portion RE can be prevented from being sprung apart by the abrupt displacement of the wall portion WP when an impact due to falling or the like is received, and because the rotation engagement portion RE can be prevented from being rotated in the direction indicated by the arrow AR12 (see the upper right drawing of fig. 14).

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 limit portion TD) of the movable side member MB (second magnet holder 7B) where the engaging portion EP is formed and the bottom plate portion BP (bottom wall portion 5B) is desirably set smaller when the lens holder 3 is at the position held by the holding mechanism HM (see upper diagram of fig. 10) than when the lens holder 3 is at the other position (see lower diagram of fig. 10). In the illustrated example, the size GP3B of the gap GP3 when the movable-side member MB is not at the front-side movement limit position is smaller than the size GP3A of the gap GP3 when the movable-side member MB is at the front-side movement limit position. This configuration brings about an effect that the engagement state (lock state) can be further suppressed from being undesirably released when an impact due to falling or the like is received. This is because the second magnet holder 7B can be restrained from moving downward when an impact due to falling or the like is received, and because the rotation engagement portion RE can be restrained from rotating in the direction indicated by the arrow AR12 (see the upper right drawing of fig. 14) due to the downward movement of the second magnet holder 7B.

As shown in fig. 12, the receiving portion 53V may include a first receiving portion 53V1 and a second receiving portion 53V2 which are provided separately in the direction of the rotation axis 50X. The rotating member 50 may further include: a magnet arrangement unit 50M in which a magnet 51 is arranged; the first shaft portion 50V1 and the second shaft portion 50V2 are provided so as to be separated from each other in the direction of the rotation axis 50X via the magnet arrangement portion 50M; and a protruding portion 50E protruding from the first shaft portion 50V1 located on the opposite side of the magnet arrangement portion 50M with the first receiving portion 53V1 interposed therebetween in a direction substantially orthogonal to the direction of the rotation axis 50X. 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 protruding portion 50E may include a first protruding portion 50E1 protruding from the first shaft portion 50V1 in a first direction substantially orthogonal to the direction of the rotation axis 50X, and a second protruding portion 50E2 protruding from the first shaft portion 50V1 in an opposite direction to the first direction. As shown in fig. 15, the first protruding portion 50E1 may be configured to constitute a rotation engagement portion RE, and the position of the center of gravity of the rotating member 50 in which the magnet 51 is fixed may be located in the region ZN of the first shaft portion 50V1 and the second shaft portion 50V2 when viewed in the direction of the rotation axis 50X. This configuration brings about an effect that the engagement state (lock state) can be further suppressed from being undesirably released when an impact due to falling or the like is received. This is because, by bringing the position of the center of gravity of the rotating member 50 to which the magnet 51 is fixed closer to the rotation axis 50X, the rotation moment due to the weight thereof can be reduced, and the rotation of the rotation engagement portion RE in the direction indicated by the arrow AR12 (see the upper right drawing of fig. 14) due to such rotation moment can be suppressed.

As shown in fig. 16, the fixed-side member FB (coil holder 5) may have a mounting portion (recess 5U) to which the rotation driving portion (lens holding unit LH) is fixed. In this case, a rib (crush rib 5C) contacting the rotation driving portion (lens holding unit LH) may be provided in the mounting portion (recess 5U). The rotation driving portion (lens holding unit LH) may be fixed to the mounting portion (recess 5U) by an adhesive BD 3. This configuration has the effect of suppressing the adhesive BD3 from adhering to the rotation driving portion (the rotating member 50 of the lens holding assembly LH) and blocking the rotation of the rotation driving portion (the rotating member 50 of the lens holding assembly LH). This is because the amount of the adhesive BD3 flowing from the first concave portion 5U1 to the third concave portion 5U3 is limited by the crush rib 5C.

As shown in fig. 3, the lens holder driving device 100 according to the embodiment of the present application includes: a fixed side member FB (substrate 2 and coil holder 5) having a side wall portion SW and a bottom plate portion BP forming a housing portion SP; the lens holder 3 is accommodated in the accommodating portion SP so as to be capable of holding the lens body LS and being movable with respect to the fixed side member FB; a driving unit DM configured to move the lens holder 3 in the optical axis direction, and including at least the magnet 6 and coils (a first left coil 42L1, a second left coil 42L2, a first right coil 42R1, and a second right coil 42R 2); and a printed wiring board 9 (flexible printed wiring board) supported by the bottom plate portion BP. Further, a notch portion CU is formed in the side wall portion SW so as to be opened upward. The printed wiring board 9 has a step ST (see the lower view of fig. 19) between a first portion 91 disposed at a position corresponding to the notch portion CU and a second portion 92 adjacent to the first portion 91 and located outside the notch 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 further includes 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 the housing portion SP including the notch portion CU, and the second portion 92 is disposed so as to be drawn out from the notch portion CU to the outside of the housing portion SP. Further, the upper surface of the first portion 91 is at a higher position than the upper surface of the second portion 92. A part of the driving unit DM (coil block 4) is disposed above the first portion 91. An adhesive BD2 shown in the upper drawing of fig. 18 is provided between the first portion 91 and a part of the driving portion DM (coil block 4). This configuration has the effect of suppressing the outflow of the adhesive BD2 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 the surface tension. Therefore, as shown in the lower diagram of fig. 20, this configuration brings about an effect that, even when the conductor pattern (fourth conductor pattern PT 4) is formed on the upper surface of the second portion 92 (second right portion 92R), the adhesive BD2 can be prevented from adhering to the conductor pattern.

As shown in fig. 19, the printed wiring board 9 may be configured such that the thickness TK1 of the first portion 91 is thicker than the thickness TK2 of the second portion 92. This configuration brings about an effect that the lower surface of the first portion 91 and the lower surface of the second portion 92 can be set to be one surface in a state where the step ST between the first portion 91 and the second portion 92 is ensured. This configuration therefore has the effect that the substrate 2 of the printed wiring substrate 9 can be easily bonded to the upper surface.

The printed wiring board 9 may be a multilayer board in which a plurality of layers are stacked. In this case, the printed wiring board 9 may be configured such that the number of layers in the first portion 91 is larger than the number of layers in the second portion 92. This configuration brings about an effect that the step ST can be easily and reliably formed between the first portion 91 and the second portion 92.

As shown in the upper view of fig. 20, the first conductor pattern PT1 may be exposed on the upper surface of the first portion 91 of the printed wiring board 9. In this case, as shown in the lower diagram of fig. 20, an adhesive BD2 may be attached to the first conductor pattern PT1. This configuration has the effect of improving the adhesive strength between the adhesive BD2 and the printed wiring board 9, and further improving the adhesive strength between each of the coil block 4 and the coil holder 5 and the printed wiring board 9. This is because the wettability of the surface of the first conductor pattern PT1 formed of metal is higher than the surface of the other portion of the printed wiring substrate 9 formed of an insulating material.

As shown in the upper view of fig. 20, a second conductor pattern PT2 and a third conductor pattern PT3 may be formed on the upper surface of the first portion 91 of the printed wiring board 9, with the first conductor pattern PT1 interposed therebetween. The second conductor pattern PT2 may be electrically connected to the first end TM1 of the coil (the first left coil 42L1, the second left coil 42L2, the first right coil 42R1, and the second right coil 42R 2) via the first bonding material SD 1. Similarly, the third conductive pattern PT3 may be electrically connected to the second end TM2 of the coil (the first left coil 42L1, the second left coil 42L2, the first right coil 42R1, the second right coil 42R 2) via the second bonding material SD 2. The adhesive BD2 may be attached to at least one of the first bonding material SD1 and the second bonding material SD 2. This configuration has the effect of improving the adhesive strength between the coil assembly 42 and the printed wiring board 9. This is because the bonding material SD is sealed with the adhesive BD2.

As shown in the upper drawing of fig. 20, a plurality of first conductor patterns PT1 may be arranged in parallel in an insulated state so as to be separated from each other between the second conductor patterns PT2 and the third conductor patterns PT3. As shown in the upper diagram of fig. 20, this configuration has an effect of suppressing conduction between the second conductor pattern PT2a and the third conductor pattern PT3a even if the first bonding material SD11 is attached to the first conductor pattern PT1a adjacent to the second conductor pattern PT2 a. This is because the first conductor pattern PT1a and the first conductor pattern PT1b are arranged with a space therebetween.

As shown in the lower diagram of fig. 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 suppressing the entry of foreign matter such as solvent (flux) into the lens holder driving device 100 even when soldering is performed to connect an external device such as the control device CTR to the printed wiring board 9. This is because the gap between the coil block 4 and the printed wiring board 9 is sealed with the adhesive BD 2.

The fixed-side member FB may have an enclosure portion EN formed integrally with the side wall portion SW so as to enclose three of four sides around the second conductor pattern PT 2. In the example shown in the upper drawing of fig. 20, the coil holder 5 has an enclosure portion EN integrally formed with the side wall portion SW so as to enclose the front, left, and right of the second conductor pattern PT2 a. The right side of the second conductor pattern PT2a is surrounded by the first surrounding portion EN 1. The coil holder 5 has an enclosure portion EN integrally formed with the side wall portion SW so as to enclose the front, left, and rear of the second conductor pattern PT2 b. The front of the second conductor pattern PT2b is surrounded by the fourth surrounding portion EN4, and the rear of the second conductor pattern PT2b is surrounded by the fifth surrounding portion EN 5. The same applies to the surrounding portion EN surrounding the third conductor pattern PT 3. This configuration has the effect that the connection between each of the second conductor pattern PT2 and the third conductor pattern PT3 and the coil group 42 becomes easy. This is because the required accuracy concerning the application position of the bonding material SD is relaxed.

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

For example, in the above-described embodiment, the coil constituting the coil group 42 may be a coil having a coil axis parallel to the Y axis as the winding center of the coil, but may be a coil having a coil axis parallel to the optical axis OA.

Description of the reference numerals

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: upper surface portion, 2: substrate, 2B: fixed side sheet metal part, 2W: erection setting part, 3: lens holder, 3B: second lens holder, 3F: first lens holder, 4: coil component, 4L: left side coil block, 4R: right-hand coil assembly, 5: coil holder, 5A: outer wall portion, 5A1: first sidewall 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 concave portion, 5U2: second concave portion, 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 hand shaft, 8R: right hand shaft, 9: printed wiring board, 10: magnetic component, 10LE: left outer magnetic part, 10LI: left inner magnetic part, 10RE: right outer magnetic part, 10RI: right inner magnetic member, 11: first cushioning material, 11LB: left rear side cushioning material, 11LF: left front side cushioning material, 11RB: right rear side cushioning material, 11RF: right front side cushioning material, 12: second cushioning material, 12LB: left rear side cushioning material, 12LF: left front side cushioning material, 12RB: right rear side cushioning, 12RF: right front side cushioning material, 13: third cushioning material, 13B: rear side cushioning material, 13F: front side cushioning material, 14: first yoke, 14B: first back side yoke, 14F: first front side yoke, 15: magnetic field generating member, 15B: rear side magnetic field generating member, 15F: front side magnetic field generating part, 16: second yoke, 16B: second back yoke, 16F: second front side yoke, 17: magnet, 17B: rear magnet, 17F: front side 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 sheet metal part, 32B: rear movable side metal plate portion, 32B1: first portion, 32B2: second portion, 32B3: third section, 32B4: fourth part, 32B5: fifth part, 32B6: sixth section, 32B7: seventh part, 32B8: eighth section, 32B9: ninth section, 32F: front movable side metal plate portion, 32F1: first part, 32F2: second part, 32F3: third section, 32F4: fourth part, 32F5: fifth section, 32F6: sixth section, 32F7: seventh part, 32F8: eighth section, 32F9: ninth part, 41: substrate, 41L: left side substrate, 41R: right side substrate, 42: coil set, 42L: left-hand coil group, 42L1: first left coil, 42L2: second left coil, 42R: right-hand coil group, 42R1: first right coil, 42R2: second right coil, 50: rotating member, 50E: protrusion, 50E1: first projection, 50E2: second protrusion, 50K: rotation side limit part, 50K1: first rotation side limit part, 50K2: second rotation side limit part, 50M: magnet arrangement portion, 50P: plane, 50V: shaft portion, 50V1: first shaft portion, 50V2: second shaft portion, 50X: axis of rotation, 51: magnet, 51N: one side portion, 51S: another 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 part, 54R: right magnetic member, 55: iron core component, 56: upper cover, 56K: stationary-side limiting portion, 56K1: first stationary side limit part, 56K2: second stationary side limit part, 57: lower side cover, 57PB: rear side collision outlet, 57PF: front protruding portion, 57RB: rear recess, 57RF: front concave portion, 71B: first rear side collision exit, 71F: first front side projection, 72B: second rear side collision exit, 72F: second front side projection, 91: first part, 91L: first left side portion, 91R: first right side portion, 92: second portion, 92L: second left side portion, 92R: second right side portion, 93: third portion, 94: fourth part, 100: lens holder driving device, AD: bonding portions BD1, BD2, BD3: adhesive, BM: base member, BP: bottom plate portion, BS: base, BSB: rear base, BSF: front base, BT: bottom, BTB: backside bottom, BTF: front bottom, CB: casing, CM: camera module, CS: power supply, CTR: control device, CU: notch portion, CUL: left notch, CUR: right notch, DM: drive unit, DM1: first drive unit, DM2: second drive portion, EM: electromagnetic mechanism, EN: enclosure, EN1: first surrounding part, EN2: second enclosure, EN3: third enclosure, EN4: fourth enclosure, EN5: fifth enclosure, EN6: sixth enclosure, EP: engagement portion, FB: fixed side part, FP: bending part, FP1: first kink, FP2: second bending part, FPB: rear side bending part, FPBL: left rear side kink, FPBR: right rear side bend, FPF: front side bending part, FPFL: left front bend, FPFR: right front side kink, GH: graphics, GM: guide mechanisms GP1 to GP5: gap, HM: holding mechanism, HS: frame body, ID: input device, IS: imaging element, L1, L2: center axis, LH: lens holding assembly, LM: lower part, LS: lens body, LS1: first lens body, LS2: second lens body, LT: light, M1, M2: center axis, MB: movable side member, MR: mirror, OA: optical axis, PK: housing space portions PT1, PT1a to PT1f: first conductor patterns PT2, PT2a, PT2b: second conductor patterns PT3, PT3a, PT3b: third conductor patterns PT4, PT4a to PT4k: fourth conductor patterns PT5, PT5B, PT F: fifth conductor pattern, RE: rotation engagement portion, SD: bonding materials SD1, SD11, SD12: first bonding materials, SD2, SD21, SD22: second bonding material, SM: stop gear, SM1: first stop gear, SM2: second stop gear, SP: housing part, ST: step, SW: side wall portion, SYS: control system, TD: lower limit portion, TH: through part, THL: left through portion THL1: first left through portion THL2: second left through portion THR: right through portion THR1: first right through portion THR2: second right through part, TM: end, TM1, TM11, TM12: first end, TM2, TM21, TM22: second end, TP: roof portion, TU: upper limit part, VP1: first virtual plane, VP2: second virtual plane, WP: wall portion, WPB: rear side wall portion, WPD: lower sidewall portion, WPF: front side wall portion, WPU: upper sidewall portion, ZN: an area.

Claims

1. A lens holder driving device is characterized by comprising:

a fixed side member having a bottom plate portion;

a lens holder capable of holding a lens body;

a guide mechanism that guides the lens holder so that the lens holder can move in the optical axis direction along the bottom plate portion; and

a driving part for moving the lens holder in the optical axis direction,

in the lens holder driving device described above,

the lens holder is open above and has a bottom portion opposed to the bottom plate portion,

at least the bottom of the portion where the lens body is disposed is constituted by a movable-side metal plate portion.

2. The lens holder driving apparatus according to claim 1, wherein,

the bottom plate portion is configured to have a fixed-side metal plate portion facing the movable-side metal plate portion.

3. The lens holder driving apparatus according to claim 1 or 2, wherein,

the lens holder has a pair of side wall portions provided so as to face away from each other in a direction intersecting the optical axis direction,

the pair of side wall portions are each composed of a synthetic resin integrated with the movable side metal plate portion,

the movable-side metal plate portion has a bent portion that constitutes the bottom base portion and is bent from the base portion and buried in the side wall portion.

4. A lens holder driving apparatus according to claim 3, wherein,

the bending portion has an adhesive portion exposed to a surface of the side wall portion and fixed to the lens body by an adhesive.

5. The lens holder driving apparatus according to claim 4, wherein,

a plurality of convex portions or concave portions are formed on the surface of the adhesive portion.

6. The lens holder driving apparatus according to claim 4, wherein,

the bending portion is bent from the base portion a plurality of times, and has: a first bending portion which bends upward from the base portion; and a second bending part, the plate surface is approximately parallel to the plate surface of the base part,

the bonding part is at least arranged at the second bending part.

7. A lens holder driving apparatus according to claim 3, wherein,

the guide mechanism is composed of two parallel shafts arranged on the fixed side part and a through part for inserting the shafts and arranged on the lens holder,

the through portions are formed in the pair of side wall portions, respectively.

8. A lens holder driving apparatus according to claim 3, wherein,

the lens holder has a magnetic field generating part,

The fixed-side 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-side metal plate portion by an adhesive.