Image sensor-based anti-shake device

Abstract

The application discloses an anti-shake device based on an image sensor, a suspension mechanism of which comprises at least two suspension elastic sheets in an elastic structure, the at least two suspension elastic sheets are uniformly installed on a mounting frame, an elastic circuit board is installed on the bottom of the mounting frame and has a plurality of elastic arms, an image sensor is movably accommodated in the mounting frame and is connected to the suspension elastic sheets and the elastic circuit board respectively, the image sensor is electrically connected to the elastic circuit board, a driving unit of a driving mechanism is installed on the mounting frame and is a single-point driving structure, and the image sensor is driven to translate or rotate by the driving units. The application has the characteristics of high anti-shake precision and anti-shake performance, a simplified structure, small space occupation and the like, and is favorable for miniaturization of the overall anti-shake device.

Description

Technical Field

[0001] This invention relates to the field of optical image stabilization technology, and in particular to an image sensor-based image stabilization device with a larger travel range, smaller size, and higher stabilization accuracy. Background Technology

[0002] Existing camera modules with image stabilization function utilize an image stabilization motor to drive the lens assembly and / or image sensor to move, thereby adjusting the relative position between the lens assembly and the image sensor to achieve image stabilization. Since the image sensor is smaller than the lens assembly, the space required for image stabilization by driving the image sensor is relatively smaller, allowing for a reduction in the thickness of the camera module and thus a smaller overall size and footprint.

[0003] In existing camera modules that use image sensors for image stabilization, the image sensor is mounted on a fixed component via an elastic part or sliding bearing, and its movement is driven by an image stabilization motor. Simultaneously, the image sensor is electrically connected to the motherboard via a flexible circuit board, which both supplies power to the image sensor and transmits image signals to the motherboard.

[0004] Current methods typically involve folding a flexible circuit board multiple times to form a frame shape, then wrapping the flexible circuit board around the image sensor to reduce the space occupied by traditional wiring and simplify the wiring process. When the image sensor moves, the flexible circuit board can synchronously adapt its deformation to maintain electrical connection with other components. However, the existing flexible circuit board setup inevitably affects the movement of the image sensor and also suffers from a large space requirement, hindering the miniaturization of the overall image stabilization device structure. Furthermore, the use of mounting structures such as sliding bearings introduces friction during image sensor movement, thus affecting stabilization accuracy.

[0005] Therefore, it is necessary to provide an image sensor-based image stabilization device with a larger travel range, smaller size, and higher stabilization accuracy to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide an image sensor-based image stabilization device with a larger travel range, smaller size, and higher stabilization accuracy.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: An image sensor-based image stabilization device is provided, comprising a mounting frame, an image sensor, a suspension mechanism, an elastic circuit board, and a driving mechanism; wherein, the suspension mechanism includes at least two suspension springs with elastic structures, the at least two suspension springs being uniformly mounted on the mounting frame with one end extending into the mounting frame; the elastic circuit board includes a first fixing part, a second fixing part disposed around the first fixing part, and a plurality of elastic arms connecting the two, the elastic circuit board being mounted on the bottom of the mounting frame via the second fixing part; the image sensor is movably housed within the mounting frame and is respectively connected to the suspension springs and the first fixing part, and the image sensor is also electrically connected to the elastic circuit board; the driving mechanism includes at least two driving units, the driving units being mounted on the mounting frame and having a single-point driving structure, driving the image sensor to translate or rotate through each driving unit.

[0008] Preferably, the suspension spring includes a first cantilever and at least one second cantilever arranged at an angle. Both the first cantilever and the second cantilever are elastic structures. The first cantilever is connected to the mounting frame, and the second cantilever is connected to the image sensor. When the image sensor moves, the first cantilever and / or the second cantilever can deform. When the first cantilever and / or the second cantilever recover their deformation, the image sensor can be reset.

[0009] Preferably, the suspension spring has two second cantilever arms, which are connected to the two ends of the first cantilever arm and are parallel to each other. The first cantilever arm is also provided with a fixing part that is angled to it. The fixing part is connected to the mounting frame. The first cantilever arm and the second cantilever arm are located inside the mounting frame and spaced apart from its inner wall.

[0010] Preferably, the flexible circuit board includes a metal layer and a circuit layer disposed on the metal layer, and the image sensor is electrically connected to the circuit layer.

[0011] Preferably, the elastic arm includes at least a first connecting arm, a second connecting arm, and a bending portion, wherein the first connecting arm and the second connecting arm are connected through the bending portion, and the first connecting arm and the second connecting arm are respectively connected to the first fixing portion and the second fixing portion.

[0012] Preferably, the edge of the first fixing part is provided with a first connecting end, the edge of the second fixing part is provided with a second connecting end, the first connecting end and the second connecting end are staggered, and the first connecting arm and the second connecting arm are respectively connected to the adjacent first connecting end and second connecting end.

[0013] Preferably, the driving unit has four units, each of which includes a movable end and a fixed end. The movable ends of the four driving units are located at the two vertices of the first diagonal of the mounting frame, and the fixed ends of the four driving units are located at the two vertices of the second diagonal of the mounting frame. The second diagonal intersects the first diagonal. When the movable end moves, it can drive the image sensor to translate or rotate.

[0014] Preferably, each of the driving units further includes an SMA line, the two ends of which are respectively connected to the fixed end and the movable end. When the SMA line is energized and contracts, it drives the movable end to move so as to act on the image sensor.

[0015] Preferably, each of the drive units further includes a push block connected to the movable end and protruding toward the image sensor, and the push block is insulated from the side of the image sensor. The movable end moves to push the image sensor with the push block.

[0016] Preferably, each of the drive units includes a spring, one end of which is fixed to the mounting frame, and the other end of which has an elastic structure, forming the movable end.

[0017] Compared with existing technologies, the image sensor-based image stabilization device of the present invention has several advantages. First, the image sensor is suspended within the mounting frame by a suspension spring of the suspension mechanism, and the bottom of the image sensor is supported and electrically connected by an elastic circuit board. Therefore, no friction is generated during the movement of the image sensor, which improves the accuracy and performance of image stabilization. Second, the elastic circuit board has a planar structure, which occupies little space and helps to reduce the overall size of the image stabilization device, further realizing the miniaturization of the device. Third, the drive unit is a single-point drive structure, that is, each drive unit has only one point of contact with the image sensor. When the image sensor is driven to translate or rotate by each drive unit, the stroke range of the image sensor is larger, improving the accuracy of image stabilization. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the image sensor-based image stabilization device of the present invention.

[0019] Figure 2 yes Figure 1 A schematic diagram showing the structure after removing the flexible circuit board and base plate.

[0020] Figure 3 yes Figure 2 A schematic diagram of the bottom structure.

[0021] Figure 4 yes Figure 2A schematic diagram of the structure after removing the image sensor.

[0022] Figure 5 yes Figure 4 A schematic diagram of the bottom structure.

[0023] Figure 6 yes Figure 1 The exploded diagram.

[0024] Figure 7 yes Figure 6 A schematic diagram of the bottom structure of the mounting frame.

[0025] Figure 8 yes Figure 6 Top view of the flexible circuit board.

[0026] Figure 9 yes Figure 6 Exploded view of a flexible circuit board.

[0027] Figure 10 yes Figure 6 A schematic diagram of the structure of a suspended spring.

[0028] Figure 11 yes Figure 6 A schematic diagram of the structure of a driving unit. Detailed Implementation

[0029] Embodiments of the present invention will now be described with reference to the accompanying drawings, in which similar element reference numerals represent similar elements. It should be noted that the orientational descriptions involved in the present invention, such as up, down, left, right, front, and rear, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the technical solutions of this application or / and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first," "second," etc., described are only used to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0030] First combine Figures 1-11As shown, the image sensor-based image stabilization device 100 provided by the present invention includes a mounting frame 110, an image sensor 120, a suspension mechanism 130, an elastic circuit board 140, and a drive mechanism 150. The suspension mechanism 130 includes at least two elastically structured suspension springs, which are evenly mounted on the mounting frame 110 with one end extending into the mounting frame 110. The elastic circuit board 140 is elastically structured and has a wiring layer, and is mounted on the bottom of the mounting frame 110. The image sensor 120 is movably housed within the mounting frame 110 and is connected to both the suspension springs and the elastic circuit board 140, and is also electrically connected to the elastic circuit board 140. The drive mechanism 150 includes at least two drive units. The drive units are mounted on the mounting frame 110 and are single-point drive structures. The image sensor 120 is driven to translate or rotate through each drive unit. During the movement of the image sensor 120 in any direction, it can cause the suspension spring and the elastic circuit board 140 to deform. When the suspension spring and the elastic circuit board 140 recover their deformation, they can drive the image sensor 120 to reset.

[0031] Combination Figure 1 , Figure 6 As shown, the image sensor-based image stabilization device 100 of the present invention further includes a base plate 160, which is mounted below the elastic circuit board 140. The base plate 160 covers the elastic circuit board 140 and exposes its pins, such as... Figure 1 As shown.

[0032] The following is combined Figures 1-5 , Figure 7 As shown, in one embodiment of the present invention, the opposite side walls of the mounting frame 110 have protruding protrusions 111 facing each other, and the protrusions 111 are located near the top of the mounting frame 110. Furthermore, a mounting portion 112 is recessed on the top surface of the mounting frame 110 corresponding to the protrusions 111, such as... Figure 1 , Figure 4 As shown, the mounting part 112 is used to install the suspension springs 130a and 130b. After installation, the suspension springs 130a and 130b abut against the protrusion 111, thereby creating a gap between the suspension springs 130a and 130b and the inner wall of the mounting frame 110. The protrusion 111 can enhance the stability of the connection between the suspension springs 130a and 130b.

[0033] Continue reading Figure 3 , Figure 7As shown, in this embodiment, the bottom surface of the mounting frame 110 is provided with a mounting groove 113. This mounting groove 113 is used to mount the drive unit, and both the fixed end and the movable end of the drive unit are located within the mounting frame 110 (see later description). In addition, a conductive insert (not shown) is also embedded within the mounting frame 110. One end of the conductive insert protrudes from the bottom of the mounting frame 110 and is electrically connected to the elastic circuit board 140. The other end of the conductive insert extends into the mounting groove 113 and protrudes from the side wall of the mounting frame 110, for electrical connection with the drive unit (see later description), and for supplying power to the drive unit. The arrangement of the conductive insert is a conventional method in the art and will not be described in detail further.

[0034] The following is combined with Figure 2 , Figure 5-6 , Figure 10 As shown, in this invention, the suspension mechanism 130 has two suspension springs 130a and 130b. The two suspension springs 130a and 130b have identical structures and are symmetrically mounted on the mounting portion 112 of the mounting frame 110. (See also...) Figure 10 As shown, the suspension springs 130a and 130b each include a first cantilever 131 and at least one second cantilever 132 arranged at an angle. Both the first cantilever 131 and the second cantilever 132 are elastic structures. The first cantilever 131 is connected to the mounting frame 110, and the second cantilever 132 is connected to the image sensor 120, thereby suspending the image sensor 120 within the mounting frame 110. When the image sensor 120 moves, the first cantilever 131 or / and the second cantilever 132 can deform. When the first cantilever 131 or / and the second cantilever 132 recovers its deformation, it can drive the image sensor 120 to reset. No friction is generated during the movement of the image sensor 120, thus improving the anti-shake accuracy and anti-shake performance.

[0035] In one specific embodiment, each suspension spring 130a, 130b includes a first cantilever 131 and two second cantilever 132. The two second cantilever 132 are respectively connected to both ends of the first cantilever 131, and both second cantilever 132 are perpendicular to the first cantilever 131. Both the first cantilever 131 and the second cantilever 132 are elastic structures. During installation, the first cantilever 131 is fixed to the mounting part 112 of the mounting frame 110, and the two second cantilever 132 are respectively connected to two opposite sides of the image sensor 120. When the image sensor 120 moves, the first cantilever 131 and / or the second cantilever 132 can deform. When the first cantilever 131 and / or the second cantilever 132 recovers its deformation, the image sensor 120 can be quickly reset.

[0036] Combination Figure 2 , Figure 10As shown, more specifically, the length of the first cantilever 131 is slightly greater than the side length of the image sensor 120, and slightly less than the side length of the inner surface of any sidewall of the mounting frame 110. Furthermore, the length of the second cantilever 132 is approximately half the side length of the image sensor 120. Thus, after the suspension springs 130a and 130b are fixed to the mounting frame 110, the first cantilever 131 extends along the sidewall of the mounting frame 110 where the mounting portion 112 is located, and abuts against the protrusion 111, thus spacing the first cantilever 131 from the sidewall of the mounting frame 110. The two second cantilever arms 132 extend along adjacent sidewalls, also spaced from the sidewall of the mounting frame 110, and their ends are fixed to approximately the middle of opposite sides of the image sensor 120. (See Figure...) Figure 2 As shown. This arrangement of the first cantilever 131 and the second cantilever 132 provides space for the image sensor 120 to move.

[0037] Continue reading Figure 2 , Figure 5-6 , Figure 10 As shown, in this specific embodiment, both suspension springs 130a and 130b further include a fixing part 313. This fixing part 313 is fixed to the middle of the first cantilever 131 and perpendicular to the first cantilever 131, and is located above the first cantilever 131. During installation, the fixing part 313 is fixed to the mounting part 112 on the top surface of the mounting frame 110, so that the first cantilever 131 and the second cantilever 132 are located within the mounting frame 110. The connection method between the fixing part 313 and the mounting frame 110 is a conventional method in the art and will not be described in detail.

[0038] More preferably, the stiffness of the first cantilever 131 and the second cantilever 132 along the Z-axis is greater than that perpendicular to the Z-axis, thus giving the suspension springs 130a and 130b better shock resistance. Specifically, when the image stabilization device 100 is subjected to an impact force along the Z-axis, the suspension springs 130a and 130b can limit the displacement in the Z-axis direction to a small range. Through the action of the two suspension springs 130a and 130b, when subjected to a large impact force, the image sensor 120 can be prevented from colliding with other components, thus preventing damage or jamming of the image sensor 120, effectively ensuring that the positions of each component in the image stabilization device 100 are within a safe range, and improving the reliability of the image stabilization device 100.

[0039] The following is combined Figure 1 , Figure 6 , Figure 8-9As shown, in this invention, the elastic circuit board 140 includes a first fixing part 141 and a second fixing part 142 arranged at intervals, and a plurality of elastic arms 143 connected between the two. The second fixing part 142 is arranged around the first fixing part 141, and the plurality of elastic arms 143 are connected to the first fixing part 141 and the second fixing part 142 at intervals. During installation, the elastic circuit board 140 is disposed below the mounting frame 110, and its second fixing part 142 is fixed to the bottom of the mounting frame 110. The first fixing part 141 is used to mount the image sensor 120. (See Figure 140 for details.) Figure 1 As shown.

[0040] Continue to combine Figure 6 , Figure 8-9 As shown, in this invention, the elastic circuit board 140 includes a metal layer 140a and a circuit layer 140b disposed on the metal layer 140a. The metal layer 140a and the circuit layer 140b have the same shape. The metal layer 140a provides elastic support, and the circuit layer 140b provides wiring. The circuit layer 140b also has pins for electrical connection with external circuitry, enabling electrical connection between the image sensor 120 and external circuitry. Furthermore, after the mounting frame 110 and the elastic circuit board 140 are installed together, the conductive insert embedded in the mounting frame 110 and the circuit layer 140b on the second fixing part 142 are electrically connected to provide power to the drive mechanism 150 (see later description). Therefore, this invention, through the provision of the elastic circuit board 140, not only achieves electrical connection but also enables multiple degrees of freedom of movement for the image sensor 120. The elastic circuit board 140 is designed entirely within a plane, requiring no folding, resulting in a simple structure and small space occupation.

[0041] Continue reading Figure 8 As shown, in one embodiment of the present invention, each elastic arm 143 includes at least a first connecting arm 1431, a second connecting arm 1432, and a bending portion 1433. The first connecting arm 1431 and the second connecting arm 1432 are connected by the bending portion 1433. The first connecting arm 1431 is connected to the first fixing portion 141, and the second connecting arm 1432 is connected to the second fixing portion 142.

[0042] In this embodiment, both the first connecting arm 1431 and the second connecting arm 1432 are rod-shaped structures, while the bent portion 1433 is arc-shaped. The included angle between the first connecting arm 1431 and the second connecting arm 1432 is approximately 90°. The mutually perpendicular first connecting arm 1431 and the second connecting arm 1432 enable multiple degrees of freedom of movement for the first fixing portion 141, providing the elasticity and deformation required for the movement of the first fixing portion 141. Of course, the first connecting arm 1431 and the second connecting arm 1432 are not limited to the aforementioned shapes; for example, they can also be arc-shaped, wavy, etc.

[0043] Continue reading Figure 8 As shown, in this embodiment, the edge of the first fixing part 141 is provided with a first connecting end 1411, and the edge of the second fixing part 142 is provided with a second connecting end 1421. The first connecting ends 1411 and the second connecting ends 1421 are staggered. Specifically, the first connecting ends 1411 have two and protrude along a first direction, that is, the two first connecting ends 1411 protrude in opposite directions, and the second connecting ends 1421 protrude along a second direction, that is, the two second connecting ends 1421 protrude towards each other. A plurality of spaced elastic arms 143 are connected between adjacent first connecting ends 1411 and second connecting ends 1421, and the first connecting arm 1431 of each elastic arm 143 is connected to the first connecting end 1411 and the second connecting arm 1432 is connected to the second connecting end 1421, thereby forming an elastic arm group. The inner and outer sides of each elastic arm group are spaced apart from the first fixing part 141 and the second fixing part 142. In this way, the elastic circuit board 140 is provided with a total of four elastic arm groups, such as Figure 8 As shown. Understandably, the number of elastic arm assemblies and elastic arms is not limited to that shown in this embodiment, and can of course be configured in other forms.

[0044] The following is combined Figure 1 , Figure 3 , Figure 5-6 , Figure 11 As shown, in one embodiment of the present invention, the driving mechanism 150 includes four driving units 150a to 150d, which are respectively mounted on the four side walls of the mounting frame 110. Each driving unit 150a to 150d is a single-point driving structure, that is, each driving unit 150a to 150d has only one point of action with the image sensor 120. Preferably, the points of action of the four driving units 150a to 150d are located at the two apex positions on the first diagonal L1 of the mounting frame 110. The image sensor 120 is driven to translate or rotate by the four driving units 150a to 150d. Since the single-point driving structure has a larger travel distance than the dual-point driving structure, it can drive the image sensor 120 to generate a larger travel distance, thereby improving the image stabilization accuracy.

[0045] Understandably, the number of drive units is not limited to four, nor is it limited to the above arrangement. The image sensor 120 can also be driven to translate or rotate through other arrangements.

[0046] The following is combined Figure 3 , Figure 5-6 , Figure 11As shown, in this invention, the four drive units 150a to 150d have identical structures. Each of the four drive units 150a to 150d includes a fixed end 151 and a movable end 152. The movable end 152 of the four drive units 150a to 150d is located at two vertices on the first diagonal L1 of the mounting frame 110. The fixed end 151 of the four drive units 150a to 150d is fixed at two vertices on the second diagonal L2 of the mounting frame 110. The first diagonal L1 and the second diagonal L2 intersect, as shown... Figure 3 , Figure 5 As shown.

[0047] Continue reading Figure 3 , Figure 5 As shown, when the movable ends 152 of the two diagonally opposite drive units at the two vertices of the first diagonal L1 simultaneously act on the image sensor 120, the image sensor 120 will be driven to rotate. Specifically, when the movable ends 152 of drive units 150a and 150c simultaneously act on the image sensor 120, the image sensor 120 will be driven to rotate along... Figure 1 The image sensor 120 rotates counterclockwise (in the opposite direction of the arrow); and when the movable ends 152 of the drive units 150b and 150d simultaneously act on the image sensor 120, the image sensor 120 is driven to rotate along... Figure 1 Rotate clockwise (in the direction indicated by the arrow).

[0048] Continue reading Figure 5 As shown, when the movable end 152 of one of the driving units acts on the image sensor 120, and simultaneously the movable ends 152 of the two adjacent driving units act on the image sensor 120 with a slightly smaller force to clamp the image sensor 120, the image sensor 120 can be pushed to translate. Specifically, when driving unit 150a needs to push the image sensor 120 to translate, driving units 150b and 150d act on the image sensor 120 with a force smaller than that of driving unit 150a. Driving units 150b and 150d generate opposite forces on the image sensor 120 to clamp it. At this time, when the movable end 152 of driving unit 150a pushes the image sensor 120, it can be translated. The principle of translation in other directions is the same.

[0049] The following is combined Figure 5 , Figure 11As shown, in this invention, each drive unit 150a-150d further includes an SMA line 153. The two ends of the SMA line 153 are connected to a fixed end 151 and a movable end 152, respectively. The SMA line 153 extends along the side wall of the mounting frame 110. The fixed end 151 and the movable end 152 respectively contact conductive inserts embedded in the mounting frame 110, thereby supplying power to the SMA line 153. When the SMA line 153 is energized and retracts, it drives the movable end 152 to move and act on the image sensor 120, while the fixed end 151 remains stationary, thus forming a single-point drive structure. The stroke of the single-point drive method is twice that of the two-point drive method, thus enabling the image sensor 120 to obtain a larger stroke and improving the image stabilization performance of the image stabilization device 100.

[0050] Continue to combine Figure 5 , Figure 11 As shown, in this invention, each drive unit 150a-150d includes at least one elastic spring sheet, which forms the movable end 152. Specifically, the spring sheet (movable end 152) includes a bent working part 1521 and a fixing part 1522. The spring sheet 152 is engaged in the mounting groove 113 on the mounting frame 110, and the fixing part 1522 is fixed to the mounting frame 110 and electrically connected to the conductive insert. The working part 1521 of the spring sheet extends into the mounting frame 110 for interacting with the image sensor 120, and the working part 1521 has an elastic structure.

[0051] More preferably, the stiffness of the spring's active part 1521 along the Z-axis is greater than its stiffness perpendicular to the Z-axis. When the SMA cable 153 is energized and contracts, it can pull the active part 1521 of the spring to deform and move. The active part 1521 acts on the image sensor 120 to push it to move or rotate. The displacement of the image sensor 120 caused by the movement of the active part 1521 is greater than the amount of contraction of the SMA cable 153, thereby giving the image sensor 120 a larger travel range and improving the image stabilization performance of the image stabilization device 100. After the SMA cable 153 is de-energized and relaxed, the active part 1521 of the spring recovers its deformation and automatically resets, thereby disengaging from the image sensor 120. In addition, it can also prevent the image stabilization device 100 from being subjected to a large impact force, which could cause the SMA cable 153 to be stretched too much and break.

[0052] Continue to combine Figure 5 , Figure 11As shown, in one embodiment, each drive unit 150a-150d includes two identical spring clips. One spring clip is engaged in the mounting groove 113 on the mounting frame 110 and is fixed to the mounting frame 110 as a whole, thereby forming the aforementioned fixed end 151. The other spring clip forms the aforementioned movable end 152. It is understood that the fixed end 151 is not limited to being fixed by the aforementioned spring clips, and other structural arrangements do not affect the function of the drive units 150a-150d.

[0053] See Figure 11 As shown, in one embodiment, each of the drive units 150a to 150d further includes two reinforcing plates 154, each reinforcing plate 154 being fixed to a spring. The reinforcing plates 154 are used to contact the conductive insert, and power is supplied to the SMA line 153 through the reinforcing plates 154 and the spring.

[0054] Understandably, the two springs can also be designed as an integral structure, that is, the two springs can be fixedly connected or integrally formed at their close ends or the reinforcing plate 154, which does not affect the realization of the function of the drive unit 150a to 150d.

[0055] Continue reading Figure 11 As shown, in this invention, each drive unit 150a-150d further includes an insulating block 155, which is formed of insulating material. The insulating block 155 also has a groove formed on it, and a push block 1551 is integrally formed on one side of the insulating block 155. The push block 1551 has an arc-shaped structure. During connection, the insulating block 155 is clamped to the movable end 152, and the push block 1551 is positioned facing the image sensor 120. By pushing the image sensor 120 with the push block 1551, insulation and wear prevention functions can be achieved. Of course, the insulating block 155 is not limited to the aforementioned structure and connection method; for example, the insulating block 155 can also be directly pasted onto the movable end 152.

[0056] Understandably, the insulating block 155 and the push block 1551 are not limited to the aforementioned arrangement. For example, in other embodiments, the push block 1551 can be integrally formed on the movable end 152, protruding towards the image sensor 120, and an insulating layer can be correspondingly provided on the side of the push block 1551 or / and the image sensor 120 to achieve an insulation effect. In addition, the push block 1551 is not limited to being arc-shaped; it can also be set to any other arbitrary shape.

[0057] Let's combine them again below. Figures 1-11 The working principle of the image sensor-based image stabilization device 100 of the present invention will be explained as shown.

[0058] Combination Figure 1 , Figure 3 , Figure 5As shown, when the image sensor 120 needs to move in the positive direction of the Y-axis, the SMA line 153 of the drive unit 150a is energized, causing the SMA line 153 to contract, thereby pulling the movable end 152 of the drive unit 150a to deform and move towards the image sensor 120. The push block 1551 on the movable end 152 pushes the image sensor 120 to move it.

[0059] Simultaneously, the SMA lines 153 of drive units 150b and 150d are energized, and the current in both is less than that in drive unit 150a. Therefore, the contraction of the SMA lines 153 in drive units 150b and 150d is less than that in drive unit 150a. The contraction of the SMA lines 153 in drive units 150b and 150d pulls their movable ends 152 towards the image sensor 120. The movable ends 152 act on the two apex corners of the image sensor 120, generating opposing forces that clamp the image sensor 120. Thus, drive unit 150a can push the image sensor 120 to translate. When the image sensor 120 needs to translate in other directions, the principle is the same as described above, and therefore will not be repeated.

[0060] When the image sensor 120 needs to be driven to rotate, for example, when it needs to rotate along... Figure 1 When rotating clockwise (as indicated by the arrow), the SMA lines 153 of drive units 150b and 150d are energized, causing the SMA lines 153 to contract. This pulls their movable ends 152, deforming them and moving them toward the image sensor 120. The push blocks 1551 on the movable ends 152 push against the two apex corners of the image sensor 120, i.e., generating opposite forces on the image sensor 120 at the two apex corners on the first diagonal L1, thereby pushing the image sensor 120 to rotate clockwise. Correspondingly, when the image sensor 120 needs to rotate counterclockwise, the SMA lines 153 of drive units 150a and 150c are energized.

[0061] During the translation or rotation of the image sensor 120, the first cantilever 131 and the second cantilever 132 of the two suspension springs 130a and 130b all deform. Simultaneously, the elastic arm 133 of the elastic circuit board 140 also deforms. This satisfies the translation or rotation requirements of the image sensor 120, enabling multi-degree-of-freedom movement and achieving good image stabilization. Furthermore, since the image sensor 120 is suspended within the mounting frame 110, there is no friction, thus improving stabilization accuracy and performance. The elastic circuit board 140 has a planar structure, occupies little space, and while providing elastic support for the image sensor 120, it does not affect the movement of the image sensor 120, thereby improving stabilization accuracy.

[0062] When the SMA lines of the aforementioned drive units 150a, 150b, and 150d are de-energized and relaxed, the movable end 152 automatically resets under the elastic force of the spring, thus moving the movable end 152 away from the image sensor 120. Simultaneously, the first cantilever 131 and the second cantilever 132 of the suspension springs 130a and 130b recover their deformation, causing the image sensor 120 to move and reset. The elastic arm 133 of the elastic circuit board 140 also recovers its deformation, causing the image sensor 120 to reset.

[0063] In summary, the image sensor-based image stabilization device 100 of the present invention firstly suspends the image sensor 120 within the mounting frame 110 via suspension springs 130a and 130b of the suspension mechanism 130. Simultaneously, the bottom of the image sensor 120 is supported and electrically connected via an elastic circuit board 140. Therefore, no friction is generated during the movement of the image sensor 120, improving stabilization accuracy and performance. Secondly, the elastic circuit board 140 has a planar structure, occupying little space, which helps reduce the overall size of the image stabilization device 100, further miniaturizing the device. Furthermore, the drive units 150a to 150d are single-point drive structures, meaning that each drive unit 150a to 150d interacts with the image sensor 120 at only one point. When the image sensor 120 is driven to translate or rotate by each drive unit 150a to 150d, the travel range of the image sensor 120 is increased, improving stabilization accuracy.

[0064] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. An image sensor-based image stabilization device, characterized in that, include: Mounting framework; The suspension mechanism includes at least two suspension springs with an elastic structure, wherein at least two suspension springs are evenly mounted on the mounting frame and one end extends into the mounting frame; A flexible circuit board includes a first fixing part, a second fixing part disposed around the first fixing part, and a plurality of flexible arms connected between the two. The flexible circuit board is mounted to the bottom of the mounting frame via the second fixing part. An image sensor is movably housed within the mounting frame and is connected to the suspension spring and the first fixing part, respectively, and the image sensor is also electrically connected to the elastic circuit board; A driving mechanism includes at least two driving units, each driving unit being mounted on the mounting frame and forming a single-point driving structure, thereby driving the image sensor to translate or rotate through each driving unit. The drive unit has four units, each of which includes a movable end and a fixed end. The movable ends of the four drive units are located at the two vertices of the first diagonal of the mounting frame, and the fixed ends of the four drive units are located at the two vertices of the second diagonal of the mounting frame. The second diagonal intersects the first diagonal. When the movable end moves, it can drive the image sensor to translate or rotate. Each of the drive units further includes an SMA line, the two ends of which are respectively connected to the fixed end and the movable end. When the SMA line is energized and retracts, it drives the movable end to move so as to act on the image sensor. Each of the aforementioned drive units includes at least one elastic spring sheet forming the movable end. The spring sheet includes a bent actuating portion and a fixing portion. The spring sheet is engaged in a mounting groove on the mounting frame, and the fixing portion is fixed to the mounting frame and electrically connected to the conductive insert. The actuating portion extends into the mounting frame to interact with the image sensor. The stiffness of the actuating portion along the Z-axis is greater than its stiffness perpendicular to the Z-axis. When the SMA line is energized and contracts, it can pull the actuating portion to deform and move, thereby acting on the image sensor to push it to move or rotate.

2. The image sensor-based image stabilization device as described in claim 1, characterized in that, The suspension spring includes a first cantilever and at least one second cantilever arranged at an angle. Both the first cantilever and the second cantilever are elastic structures. The first cantilever is connected to the mounting frame, and the second cantilever is connected to the image sensor. When the image sensor moves, the first cantilever and / or the second cantilever can deform. When the first cantilever and / or the second cantilever recovers its deformation, the image sensor can be reset.

3. The image sensor-based image stabilization device as described in claim 2, characterized in that, The suspension spring has two second cantilever arms, which are connected to the two ends of the first cantilever arm and are parallel to each other. The first cantilever arm is also provided with a fixing part that is set at an angle to it. The fixing part is connected to the mounting frame. The first cantilever arm and the second cantilever arm are located inside the mounting frame and are spaced apart from its inner wall.

4. The image sensor-based image stabilization device as described in any one of claims 1-3, characterized in that, The flexible circuit board includes a metal layer and a circuit layer disposed on the metal layer, and the image sensor is electrically connected to the circuit layer.

5. The image sensor-based image stabilization device as described in any one of claims 1-3, characterized in that, The elastic arm includes at least a first connecting arm, a second connecting arm, and a bending portion. The first connecting arm and the second connecting arm are connected through the bending portion, and the first connecting arm and the second connecting arm are respectively connected to the first fixing portion and the second fixing portion.

6. The image sensor-based image stabilization device as described in claim 5, characterized in that, The first fixing part has a first connecting end protruding from its edge, and the second fixing part has a second connecting end protruding from its edge. The first connecting end and the second connecting end are staggered, and the first connecting arm and the second connecting arm are respectively connected to the adjacent first connecting end and second connecting end.

7. The image sensor-based image stabilization device as described in claim 1, characterized in that, Each of the drive units further includes a push block connected to the movable end and protruding toward the image sensor, and the push block is insulated from the side of the image sensor. The movable end moves to push the image sensor with the push block.

8. The image sensor-based image stabilization device as described in claim 1, characterized in that, Each of the drive units includes a spring, one end of which is fixed to the mounting frame, and the other end of which has an elastic structure, forming the movable end.

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