Flexible circuit board, optical module driving device and optical unit

Abstract

An optical module driving device comprises a seat stand, a rotation driving part which is arranged on one side of the seat stand and drives the seat stand to rotate around a first shaft, and an inclined driving part which is supported on the other side of the seat stand in a free swinging mode and drives an optical module to swing around the direction perpendicular to the first shaft. The optical module comprises a seat stand and a flexible circuit board for supplying power to the optical module, and is characterized in that the flexible circuit board is provided with a plane part and a peripheral part which is formed by bending and is perpendicular to the plane part, the peripheral part is wound outside the seat stand, and a gap is formed between the peripheral part and the peripheral surface of the seat stand; a relay part is arranged between the plane part and the peripheral part of the flexible circuit board, and the relay part is fixed on the seat stand, so that no relative motion exists between the plane part and the seat stand when the rotation driving part drives the seat stand to rotate; and when the inclined driving part drives the optical module to incline, no relative motion exists between the peripheral part and the seat stand.

Description

Technical Field

[0001] The present invention relates to a flexible circuit board, an optical module driving device having the flexible circuit board, and an optical unit having the optical module driving device. Background Technology

[0002] In optical units used in imaging devices such as cameras, optical module drive devices with tilt and rotation drive functions have been developed to suppress image distortion caused by camera shake. The tilt drive function allows the optical module to tilt (wobble) around the X and Y axes respectively, while the rotation drive function allows the optical module to rotate around the optical axis. In addition to the optical module drive device, the optical unit also includes, for example, a lens, an image sensor, an automatic focus (AF) unit, and a flexible printed circuit board (FPC) for powering the optical module.

[0003] In the prior art, there are cases where a dedicated flexible circuit board space is designed on the outside of the main body composed of the optical module and the optical module driving device in order to reduce the reaction force of the flexible circuit board. For example, the flexible circuit board connected to the optical module is led out from the movable body that carries the optical module and disposed on the outside of the main body.

[0004] In this case, the product size will increase because a dedicated space for the flexible circuit board needs to be designed. Summary of the Invention

[0005] The present invention was made in view of the above-mentioned problems, and aims to provide a flexible circuit board that can reduce product size and reduce reaction force, an optical module driving device having a flexible circuit board, and an optical unit having an optical module driving device.

[0006] The optical module driving device of technical solution one includes: a base, a rotary drive unit disposed on one side of the base and driving the base to rotate about a first axis, an tilt drive unit supported on the other side of the base in a swinging manner and driving the optical module to swing about a direction perpendicular to the first axis, and a flexible circuit board for supplying power to the optical module. The flexible circuit board is characterized in that: the flexible circuit board has a planar portion and a bent outer peripheral portion perpendicular to the planar portion; the outer peripheral portion is disposed around the outside of the base and has a gap with the outer peripheral surface of the base; a relay portion is provided between the planar portion and the outer peripheral portion of the flexible circuit board; the relay portion is fixed to the base, such that when the rotary drive unit drives the base to rotate, there is no relative movement between the planar portion and the base; when the tilt drive unit drives the optical module to tilt, there is no relative movement between the outer peripheral portion and the base.

[0007] According to technical solution one, the planar part and the outer peripheral part of the flexible circuit board can move independently without crosstalk between them, and the reaction force is small. In addition, the flexible circuit board is simply set between the base and the rotary drive part, which can avoid increasing the product size.

[0008] The optical module driving device of technical solution two has a serpentine shape in its planar portion.

[0009] According to technical solution two, the range of motion of the flexible circuit board can be extended.

[0010] The optical module driving device of technical solution three has a first lead-out portion connected to the housing of the rotary drive portion in the outer peripheral portion, and a second lead-out portion connected to the base plate of the optical module in the planar portion. When viewed along the first axis direction, the first lead-out portion, the relay portion and the second lead-out portion are located on the same axis. The outer peripheral portion and the planar portion are symmetrically arranged on both sides of the axis with the axis as the center.

[0011] According to technical solution three, when viewed along the first axis, the first lead-out part, the relay part and the second lead-out part are located on the same axis, and the outer periphery and flat surface adopt a symmetrical configuration structure, which can improve the balance of optical module driving.

[0012] The optical module driving device of technical solution four also has a housing covering the outside of the tilting drive part and the base. The housing has a side wall and a plurality of limiting parts. The edge of the side wall abuts against the base. The plurality of limiting parts extend outward from the edge of the side wall and bend toward the side where the rotation drive part is located to prevent the outer peripheral part from detaching from the base. The outer peripheral part is received between the plurality of limiting parts and the base. There is a gap between the plurality of limiting parts and the outer peripheral part. The front ends of the plurality of limiting parts do not protrude from the bottom surface of the base.

[0013] According to technical solution four, by setting multiple limiting parts and having gaps between the multiple limiting parts and the outer peripheral surface, the flexibility of the flexible circuit board can be limited while ensuring the degree of freedom of the flexible circuit board, thus avoiding the dislocation of the flexible circuit board caused by inversion during transportation, accidental dropping and impact, etc.

[0014] The flexible circuit board in technical solution five is used in an optical module driving device. It is mounted between a rotary driving unit and a tilting driving unit. The tilting driving unit is supported on a base on one side of the flexible circuit board in a freely swinging manner. The rotary driving unit is located on the other side of the flexible circuit board. The rotary driving unit drives the base to rotate about a first axis, and the tilting driving unit drives the optical module to swing about a direction perpendicular to the first axis. The flexible circuit board is used to supply power to the optical module. The flexible circuit board is characterized by having a planar portion and a portion formed by bending. The flexible circuit board has a planar portion perpendicular to the outer peripheral portion. A relay portion is provided between the planar portion and the outer peripheral portion. The relay portion functions as a fixing portion that is fixed to the base when it is mounted on the base, so that there is no relative movement between the planar portion and the base when the rotation drive unit drives the base to rotate; there is no relative movement between the outer peripheral portion and the base when the tilt drive unit drives the optical module to tilt; when the flexible circuit board is mounted on the base, the outer peripheral portion of the flexible circuit board is arranged around the outside of the base and there is a gap between it and the outer peripheral surface of the base.

[0015] According to technical solution five, the same advantages as technical solution one can also be achieved, namely: the planar part and the outer peripheral part of the flexible circuit board can move independently without crosstalk between them, and the reaction force is small. In addition, the flexible circuit board is simply set between the base and the rotary drive part, which can avoid the increase in product size.

[0016] The flexible circuit board of technical solution six has a serpentine shape in its planar portion.

[0017] According to technical solution six, the same advantages as technical solution two can also be achieved, namely, the range of motion of the flexible circuit board can be extended.

[0018] The flexible circuit board of technical solution seven has a first lead-out portion connected to the housing of the rotary drive portion on the outer periphery, and a second lead-out portion connected to the base plate of the optical module on the planar portion. When viewed along the first axis, the first lead-out portion, the relay portion and the second lead-out portion are located on the same axis. The outer periphery portion and the planar portion are symmetrically arranged on both sides of the axis with the axis as the center.

[0019] According to technical solution seven, the same advantages as technical solution three can also be achieved, namely, the balance of optical module driving can be improved.

[0020] In the flexible circuit board of technical solution eight, the optical module driving device further includes a housing covering the outside of the tilting driving part and the base. The housing has side walls and multiple limiting parts. The edge of the side wall abuts against the base and is fixed to the base, so that there is no relative movement between the housing and the base when the rotating driving part drives the base to rotate. The multiple limiting parts extend outward from the edge of the side wall and bend towards the side where the rotating driving part is located to prevent the outer peripheral part from detaching from the base. The outer peripheral part is accommodated between the multiple limiting parts and the base. There is a gap between the multiple limiting parts and the outer peripheral part. The front ends of the multiple limiting parts do not protrude from the bottom surface of the base.

[0021] According to technical solution eight, the same advantages as technical solution four can also be achieved, namely: while ensuring the degree of freedom of the flexible circuit board, the range of motion of the flexible circuit board is limited, and the flexible circuit board is prevented from dislodging due to inversion during transportation, accidental drop and impact, etc.

[0022] The optical unit of technical solution nine includes: the optical module driving device described in technical solutions one to four; and an optical module mounted on the optical module driving device and capable of being tilted and rotated by the optical module driving device.

[0023] According to technical solution nine, the same advantages as technical solution one can be achieved, namely: the planar part and the outer peripheral part of the flexible circuit board can move independently without crosstalk between them, and the reaction force is small. In addition, the flexible circuit board is simply set between the base and the rotary drive part, which can avoid the increase in product size.

[0024] The optical unit of technical solution ten includes at least an imaging sensor.

[0025] The optical unit of technical solution eleven further includes an autofocus unit that enables the optical motor to move along the optical axis. Attached Figure Description

[0026] Figure 1 A three-dimensional diagram showing the optical unit.

[0027] Figure 2 An exploded perspective view showing the main components of the optical unit.

[0028] Figure 3 An exploded perspective view showing the optical units divided based on a flexible circuit board.

[0029] Figure 4 This is a top view of a flexible circuit board.

[0030] Figure 5This is a schematic diagram showing the engagement state of the flexible circuit board with the base plate, platform, and housing of the optical module's rotary drive unit.

[0031] Figure 6A A top view showing the base plate, flexible circuit board, and rotary actuator before and during tilting. Figure 6B A top view showing the base plate, flexible circuit board, and rotary actuator before and during rotation.

[0032] Figure 7 A magnified stereoscopic view of a portion of the optical unit.

[0033] Figure 8 This is a top view of the optical unit.

[0034] Figure 9 Indicates along Figure 8 The cross-sectional view shown along line AA.

[0035] Explanation of reference numerals in the attached figures

[0036] 1 Optical Unit O Optical Axis 10 Housing 11 Top 12 Side Wall 13 Bending Part (Limiting Part) AF Autofocus Unit 20 Base Plate 30 Tilting Drive Part 31 First Tilting Drive Part 32 Second Tilting Drive Part 33 Memory Metal Wire 40 Base 50 Flexible Circuit Board 51 Planar Part 52 Relay Part 53 Outer Peripheral Part 54 Main Body Part 55 Lead-out Part (Second Lead-out Part) 56 Lead-out Part (First Lead-out Part) A Joint Area B Joint Area C Joint Area AX Axis 60 Rotation Drive Part 61 Housing Detailed Implementation

[0037] Hereinafter, with reference to the accompanying drawings, the optical unit, optical module driving device, and flexible circuit board of this embodiment will be described.

[0038] Figure 1 A three-dimensional diagram showing the optical unit. Below, for ease of explanation, [the following will be shown as a separate section]. Figure 1 The Z-axis direction shown is the same as the direction where the optical axis O is located, and the Z-axis is called the up-down direction. The direction pointed to by the arrow on the Z-axis is called "up" or "above," and the opposite direction pointed to by the arrow on the Z-axis is called "down" or "below." Figure 1 The Y-axis direction shown is called the front-back direction. The direction pointed to by the arrow on the Y-axis is called "back" or "rear," and the opposite direction pointed to by the arrow on the Y-axis is called "front" or "forward." Figure 1 The X-axis direction shown is called the left-right direction. The up-down, front-back, and left-right directions shown here may not be the same as the actual directions used in practice.

[0039] In addition, when an imaging sensor, an autofocus unit (AF), a lens, etc. are installed in the optical unit, the horizontal plane formed by the X-axis and the Y-axis is the plane where the imaging sensor is located, the Z-axis is the direction perpendicular to the plane where the imaging sensor is located, and the side above the Z-axis is closer to the lens than the imaging sensor.

[0040] Figure 2 An exploded perspective view showing the main components of the optical unit. (e.g.) Figure 2 As shown, the optical unit 1 of this embodiment includes, from top to bottom, a housing 10, an autofocus unit AF, a base plate 20 for mounting an imaging sensor, a tilt drive unit 30, a base 40, a flexible circuit board 50, and a rotation drive unit 60. Figure 2 The illustrations of the imaging sensor and lens are omitted. In this embodiment, the autofocus unit AF, the imaging sensor (not shown), and the lens are considered together as an optical module, but the imaging sensor alone may also be considered as an optical module. Thus, the optical module driving device includes a housing 10, a base plate 20 for mounting the imaging sensor, a tilting drive unit 30, a platform 40, a flexible circuit board 50, and a rotation drive unit 60.

[0041] The outer casing 10 has a top with an opening, a sidewall that bends downward from the top, and a bend that continues downward from a portion of the lower edge of the sidewall. For example... Figure 1 As shown, in the assembled state of the optical unit, the outer shell 10 covers the outside of the base plate 20, the tilting drive part 30 and the base 40, and the opening at the top exposes the base plate 20. The outer shell 10 is roughly square in top view.

[0042] The autofocus unit AF is used to move a lens (not shown) along the optical axis and to focus the captured image onto the lens on the image sensor. The AF cylindrical section is used to mount the lens, and the AF's perimeter is used to fix it to the tilt drive unit 30. The base plate 20 of the image sensor (not shown) is fixed to the bottom of the AF. In this embodiment, the autofocus unit AF, lens, and image sensor can also be omitted at the factory and reassembled during distribution.

[0043] The base plate 20 is formed into a square plate with approximately the same dimensions as the autofocus unit AF. A recess for mounting the imaging sensor is formed in the central portion of the upper surface of the base plate 20. In the optical axis direction, this recess coincides with the cylindrical portion of the autofocus unit AF. In the assembled state, the base plate 20 is located between the autofocus unit AF and the flexible circuit board 50.

[0044] The tilt drive unit 30 is configured to surround the optical module. The tilt drive unit 30 includes a first tilt drive unit 31, a second tilt drive unit 32, and a shape memory metal wire 33. A base plate 20 for supporting the optical module is fixed to the first tilt drive unit 31, which can drive the optical module to swing around the X-axis. The second tilt drive unit 32 is supported on the lower platform in a swing-free manner. The second tilt drive unit 32 can drive the optical module and the first tilt drive unit 31 to swing together around the Y-axis. Thus, under the combined action of the first tilt drive unit 31 and the second tilt drive unit 32, the optical module can be driven to swing around the X-axis and Y-axis directions, respectively, which are perpendicular to the Z-axis.

[0045] The memory metal wires 33 that provide driving force to the tilting drive unit consist of two sets. One set is connected between the second tilting drive unit 32 and the base 40, and the other set is connected between the second tilting drive unit 32 and the first tilting drive unit 31. Power is supplied to the two sets of memory metal wires through conductive terminals (not shown). When current flows through the two sets of memory metal wires, the first set of memory metal wires contracts and pulls the first tilting drive unit 31 to swing around the X-axis, and the other set of memory metal wires contracts and pulls the second tilting drive unit 32 to swing around the Y-axis.

[0046] The above is an example of the tilt drive unit 30. It is not limited to this example. Other drive methods can also be used, as long as they can enable the optical module to swing around the X-axis and Y-axis (i.e., the direction perpendicular to the Z-axis (optical axis O) respectively).

[0047] The base 40 is frame-shaped when viewed from above and is positioned below the tilt drive unit 30. It supports the second tilt drive unit 32 and allows the second tilt drive unit 32 to swing freely about the Y-axis relative to the base 40. Furthermore, during assembly, the housing 10 is fixed to the base 40 by covering the outside of the autofocus unit AF, the tilt drive unit 30, and the base 40. In this assembled state, a portion of the lower outer surface of the base 40 is surrounded by the housing 10, while another portion protrudes from the housing 10. Additionally, the flexible circuit board 50 and the rotary drive unit 60 are fixed at different positions on the lower surface of the base 40.

[0048] The flexible circuit board 50 is disposed between the base 40 and the rotary drive unit 60. It has a planar portion and a bent outer peripheral portion perpendicular to the planar portion. The outer peripheral portion, when viewed from above, forms a roughly quadrilateral frame shape, while the planar portion forms a serpentine shape. In the assembled state, the outer peripheral portion wraps around the outside of the base 40, with a gap between it and the outer peripheral surface of the base. The flexible circuit board 50 is a circuit board used to supply power to the optical module; one end is connected to an external power supply, and the other end is connected to the optical module. The specific structure of the flexible circuit board 50 will be described later.

[0049] The rotary drive unit 60 comprises a movable part (not shown), a base serving as a fixed part, and a housing covering the movable part and the base and fixedly connected to the base. Viewed from above, the rotary drive unit 60 is roughly quadrilateral in shape, slightly larger than the quadrilateral frame of the flexible circuit board 50. The rotary drive unit 60 is positioned below the flexible circuit board 50. The base 40 and the flexible circuit board 50 are fixed to the rotary drive unit 60. Specifically, the base 40 is connected to the movable part of the rotary drive unit 60, and the lead-out portion of the flexible circuit board 50 is fixed to the housing of the rotary drive unit 60.

[0050] Figure 3 An exploded perspective view is shown, divided based on a flexible circuit board. Figure 3 Using a flexible circuit board as a reference, all components above and below it are represented in an assembled state.

[0051] The flexible circuit board in this embodiment is used in an optical module driving device and is mounted between a rotation drive unit and a tilt drive unit. The tilt drive unit is supported on a base on one side of the flexible circuit board in a manner that allows it to swing freely, while the rotation drive unit is fixed to the other side of the flexible circuit board. The rotation drive unit drives the base to rotate about a first axis, and the tilt drive unit drives the optical module to swing about a direction perpendicular to the first axis. The flexible circuit board is used to supply power to the optical module.

[0052] like Figure 4 As shown, the flexible circuit board 50 has a planar portion 51, a relay portion 52, and an outer peripheral portion 53. The planar portion 51 has a main body portion 54 and a lead-out portion 55 (also called a second lead-out portion). The main body portion 54 is formed in a plane composed of the X-axis and Y-axis, and is composed of a straight outer ring and a serpentine inner ring that extend continuously. By setting it to a serpentine shape, the movable range of the flexible circuit board can be extended. The main body portion 54 is in the same plane as the relay portion 52 and is connected to one side of the outer peripheral portion 53 via the relay portion 52 near one side. The lead-out portion 55 (second lead-out portion) is raised from the center of the main body portion 54 and extends along the axis AX to form a connection with the base plate 20 of the imaging sensor. The outer peripheral portion 53 is formed into a generally quadrilateral frame shape when viewed from above. The relay portion 52 is connected between the planar portion 51 and the outer peripheral portion 53, specifically, it is only connected between one side of the planar portion 51 and the outer peripheral portion 53, and is not formed between the planar portion 51 and the other three sides. The outer peripheral portion 53 is formed by bending upward relative to the relay portion 52, and the outer peripheral portion 53 also has an outlet portion 56 (also called the first outlet portion) that is connected to the housing of the rotary drive portion 60.

[0053] When viewed along the Z-axis, the first lead-out section 56, the relay section 52, and the second lead-out section 55 are located on the same axis AX, and the outer peripheral section 53 and the planar section 51 are symmetrically arranged on both sides of the axis AX with the axis AX as the center.

[0054] In addition, the flexible circuit board 50 is provided with three bonding areas A to C. Bonding area A enables the flexible circuit board 50 to be bonded to the base plate 20 of the imaging sensor, bonding area B enables the flexible circuit board 50 to be bonded to the lower surface of the base 40, and bonding area C enables the flexible circuit board 50 to be bonded to the housing of the rotary drive unit 60.

[0055] Figure 5 This diagram shows the flexible circuit board 50 engaged with the base plate 20, the mount 40, and the housing 61 of the rotary drive unit 60 of the imaging sensor. In the assembled state, the outer peripheral portion 53 is wrapped around the outside of the mount 40, and there is a gap between it and the outer peripheral surface of the mount 40, thereby maintaining the freedom of movement of the flexible circuit board. The first lead-out portion 56 of the flexible circuit board 50 is connected to an external power supply, and the second lead-out portion 55 of the flexible circuit board 50 is fixed to the base plate 20 of the imaging sensor and electrically connected to the optical module, thereby enabling power supply to the optical module.

[0056] Figure 6A A top view showing the base plate, flexible circuit board, and rotary actuator before and during tilting. Figure 6B A top view showing the base plate, flexible circuit board, and rotary actuator before and during rotation. Figure 6A , Figure 6B This is a schematic diagram used to illustrate the independent operation of the planar portion and the outer periphery of a flexible circuit board.

[0057] Figure 6A The view on the left shows the state before tilting, and the view on the right shows the state when tilted. For example... Figure 6A As shown, when the base plate 20 is tilted, the planar portion 51 of the flexible circuit board connected to the base plate 20 is tilted along with it, and the planar portion 51 is deformed. At this time, since the relay portion 52 is fixed on the base 40, there is no relative movement between the outer peripheral portion 53 and the base 40, and the reaction force is small.

[0058] Figure 6B The view on the left shows the state before rotation, and the view on the right shows the state during rotation. For example... Figure 6B As shown, when the movable part of the rotary drive unit 60 rotates, the base 40 and the planar part 51 and relay part 52 in the flexible circuit board rotate together with the movable part. Therefore, there is no relative movement between the planar part 51 and the base 40. In addition, the first lead-out part 56 of the flexible circuit board 50 is fixed on the fixed part of the rotary drive unit 60, and the outer periphery 53 of the flexible circuit board is deformed.

[0059] Therefore, the planar portion and the outer periphery of the flexible circuit board can move independently without crosstalk between them, resulting in less reaction force.

[0060] Figure 7 A magnified stereoscopic view of a portion of the optical unit.

[0061] like Figure 7 As shown, the housing 10 has a top 11 with an opening, side walls 12 formed by bending downwards from the four sides of the top 11, and bent portions 13 extending outwards from the lower edges of each side wall and bending towards the side where the rotation drive unit 60 is located. The bent portions 13 are not formed on the entire circumference of the side walls 12, but rather on a portion of the lower edge of the side walls 12 such that a portion of the outer periphery 53 of the flexible circuit board 50 is exposed. The bent portions 13 are, for example, formed in an inverted L-shape. In the assembled state of the optical unit, the housing 10 covers the base plate 20, the tilt drive unit 30, the base 40, and the outer side of the flexible circuit board 50 from above, restricting the outer periphery 53 of the flexible circuit board 50 from detaching upwards and outwards, thereby preventing the outer periphery 53 of the flexible circuit board 50 from detaching from the base 40. Therefore, the bent portions 13 can also be referred to as limiting portions. The edges of the side walls 12 abut against the base 40 and are fixed to the base 40.

[0062] Figure 8 This is a top view of the optical unit. Figure 9 Indicates along Figure 8 The cross-sectional view shown along line AA. Figure 9 As shown, in the assembled state, the flexible circuit board 50 achieves the connection between the second lead-out portion 55 and the base plate 20 of the imaging sensor through the connection area A, the connection between the relay portion 52 and the lower surface of the base 40 through the connection area B, and the connection between the first lead-out portion 56 and the housing 61 of the rotary drive portion 60 through the connection area C.

[0063] In addition, in the assembled state, the outer peripheral portion 53 is housed between the multiple bends (limiting portions) 13 and the base 40, and there is a gap between the multiple bends 13 and the outer peripheral portion 53, thereby ensuring the freedom of movement of the flexible circuit board. In addition, in order to avoid interference, the front end (lower end) of the multiple bends 13 is set to not protrude from the bottom surface of the base 40.

[0064] By adopting the above structure, the planar part and the outer peripheral part of the flexible circuit board can move independently without crosstalk between them, resulting in less reaction force. In addition, the flexible circuit board is simply placed between the base and the rotary drive part, which can avoid increasing the product size.

[0065] The foregoing has described several embodiments of the present invention, but these embodiments are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, and are included in the scope of the invention as described in the claims and its equivalents.

Claims

1. An optical module driving device, comprising: The system comprises: a base, a rotary drive unit disposed on one side of the base and driving the base to rotate about a first axis, an tilt drive unit supported on the other side of the base in a swinging manner and driving the optical module to swing about a direction perpendicular to the first axis, and a flexible circuit board for supplying power to the optical module, characterized in that: The flexible circuit board has a planar portion and an outer peripheral portion formed by bending, which is perpendicular to the planar portion. The outer peripheral portion is disposed around the outside of the base and has a gap between it and the outer peripheral surface of the base. The flexible circuit board has a relay portion between the planar portion and the outer peripheral portion, and the relay portion is fixed to the base, so that when the rotation drive portion drives the base to rotate, there is no relative movement between the planar portion and the base; when the tilt drive portion drives the optical module to tilt, there is no relative movement between the outer peripheral portion and the base.

2. The optical module driving device according to claim 1, characterized in that: The planar portion has a serpentine shape.

3. The optical module driving device according to claim 1, characterized in that: The outer peripheral portion has a first lead-out portion that connects to the housing of the rotary drive unit, and the planar portion has a second lead-out portion that connects to the base plate of the optical module. When viewed along the first axis, the first lead-out portion, the relay portion, and the second lead-out portion are located on the same axis, and the outer peripheral portion and the planar portion are symmetrically arranged on both sides of the axis with the axis as the center.

4. The optical module driving device according to claim 1, characterized in that: It also has a housing covering the outside of the tilting drive unit and the base, the housing having side walls and multiple limiting parts. The edge of the sidewall abuts against the base. The plurality of limiting portions extend outward from the edge of the sidewall and bend toward the side where the rotary drive unit is located, to prevent the outer peripheral portion from detaching from the base. The outer peripheral portion is housed between the plurality of limiting portions and the base. There is a gap between the plurality of limiting parts and the outer peripheral part, and the front ends of the plurality of limiting parts do not protrude from the bottom surface of the base.

5. A flexible circuit board used in an optical module driving device, mounted between a rotation driving unit and a tilting driving unit, wherein the tilting driving unit is supported on a base on one side of the flexible circuit board in a swingable manner, the rotation driving unit is disposed on the other side of the flexible circuit board, the rotation driving unit drives the base to rotate about a first axis, and the tilting driving unit drives the optical module to swing about a direction perpendicular to the first axis, the flexible circuit board being used to supply power to the optical module, characterized in that... The flexible circuit board has a planar portion and an outer peripheral portion formed by bending, perpendicular to the planar portion. A relay portion is provided between the planar portion and the outer peripheral portion of the flexible circuit board. This relay portion functions as a fixing portion that is fixed to the base during mounting, ensuring no relative movement between the planar portion and the base when the rotation drive unit drives the base to rotate; and no relative movement between the outer peripheral portion and the base when the tilt drive unit drives the optical module to tilt. When the flexible circuit board is mounted on the base, the outer peripheral portion of the flexible circuit board is wrapped around the outside of the base and there is a gap between it and the outer peripheral surface of the base.

6. The flexible circuit board as described in claim 5, characterized in that, The planar portion has a serpentine shape.

7. The flexible circuit board as described in claim 5, characterized in that, The outer peripheral portion has a first lead-out portion that connects to the housing of the rotary drive unit, and the planar portion has a second lead-out portion that connects to the base plate of the optical module. When viewed along the first axis, the first lead-out portion, the relay portion, and the second lead-out portion are located on the same axis, and the outer peripheral portion and the planar portion are symmetrically arranged on both sides of the axis with the axis as the center.

8. The flexible circuit board as described in claim 5, characterized in that, The optical module driving device also has a housing covering the outside of the tilting drive unit and the base, the housing having side walls and multiple limiting parts. The edge of the sidewall abuts against and is fixed to the base, such that there is no relative movement between the outer shell and the base when the rotary drive unit drives the base to rotate. The plurality of limiting portions extend outward from the edge of the sidewall and bend toward the side where the rotary drive unit is located, to prevent the outer peripheral portion from detaching from the base. The outer peripheral portion is housed between the plurality of limiting portions and the base. There is a gap between the plurality of limiting parts and the outer peripheral part, and the front ends of the plurality of limiting parts do not protrude from the bottom surface of the base.

9. An optical unit, characterized in that: have: The optical module driving device according to claims 1-4; and An optical module mounted on the optical module driving device and capable of being tilted and rotated by the optical module driving device.

10. The optical unit as claimed in claim 9, characterized in that: The optical module includes at least an imaging sensor.

11. The optical unit as claimed in claim 10, characterized in that: The optical module also includes an autofocus unit that enables the optical motor to move along the optical axis.

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