Optical anti-shake device

Abstract

The invention discloses an optical anti-shake device applied to an image sensor. The optical anti-shake device at least comprises a fixed assembly, a movable assembly, an actuating assembly, an elastic connecting assembly and a transmission assembly, the actuating assembly is arranged on the fixing assembly; the transmission assembly is arranged on the fixing assembly; the first end of the transmission assembly is connected with the actuating assembly, and the second end of the transmission assembly is connected with the moving assembly; the fixed assembly and the movable assembly are connected through an elastic connecting assembly. The actuating assembly drives the transmission assembly to drive the moving assembly to move, and the first displacement generated by the actuating assembly is smaller than the second displacement generated by the moving assembly, so that the optical anti-shake stroke is increased, and the optical anti-shake performance is improved.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging, and in particular to an optical anti-shake device. Background Art

[0002] When a handheld portable smart device is used to take photos, the physiological tremor of the human body is unavoidable and cannot be overcome through training. As a result, the handheld portable smart device will inevitably shake along with the human body when taking photos, resulting in a decrease in image quality. The most obvious manifestation is that the image obtained is blurry and unclear.

[0003] Existing handheld portable smart devices use shape memory alloy drive components in the camera module to move the lens component perpendicular to the optical axis or rotate it around the optical axis, thereby compensating for the physiological vibration of the human body and obtaining high-quality images. The existing optical image stabilization stroke is short, usually equal to the extension and contraction distance of the shape memory alloy wire when powered on, so the optical image stabilization stroke is limited, and it is difficult to further significantly improve the optical image stabilization performance. Summary of the invention

[0004] The object of the present invention is to provide an optical anti-shake device, which can enlarge the optical anti-shake stroke and improve the optical anti-shake performance.

[0005] The present invention provides an optical anti-shake device applied to an image sensor, which at least comprises: a fixed component, a moving component, an actuating component, an elastic connecting component and a transmission component; the actuating component is placed on the fixed component; the transmission component is placed on the fixed component; the first end of the transmission component is connected to the actuating component, and the second end of the transmission component is connected to the moving component; the fixed component and the moving component are connected via an elastic connecting component; the actuating component drives the moving component to move by driving the transmission component, and can achieve that a first displacement generated by the actuating component is smaller than a second displacement generated by the moving component, thereby increasing the optical anti-shake stroke and improving the optical anti-shake performance.

[0006] In some embodiments, a housing is further included, and a support is provided between the housing and the transmission assembly to ensure smooth operation of the transmission assembly.

[0007] In some embodiments, the actuating assembly includes at least: a shape memory alloy wire; the shape memory alloy wire deforms when energized, thereby generating the first displacement; the first end of the shape memory alloy wire is a movable end connected to the transmission assembly; the second end of the shape memory alloy wire is a fixed end connected to the fixed assembly.

[0008] In some embodiments, the actuating assembly further includes: a first clamping member and a second clamping member; the two ends of the shape memory alloy wire are respectively fixed by the first clamping member and the second clamping member; the first end of the shape memory alloy wire is connected to the transmission assembly via the first clamping member; the connection method between the first clamping member and the transmission assembly includes soldering, laser welding, conductive adhesive bonding or integral molding; the second end of the shape memory alloy wire is connected to the fixed assembly via the second clamping member; the connection method between the second clamping member and the fixed assembly includes soldering or laser welding, conductive adhesive bonding; the material of the first clamping member and the second clamping member is copper alloy, aluminum alloy, stainless steel, gold or silver.

[0009] In some embodiments, the transmission assembly at least includes: a first fixed part, a first connecting rod, a second connecting rod and a third connecting rod fixed on the fixed assembly; the connection method between the first fixed part and the fixed assembly includes soldering, laser welding, and conductive adhesive bonding; the first end of the first connecting rod is connected to the first fixed part; the second end of the first connecting rod is connected to the first end of the second connecting rod; the second end of the second connecting rod is connected to the actuating assembly; the first end of the third connecting rod is connected to the second end of the second connecting rod; the second end of the third connecting rod is connected to the moving assembly; the connection method between the second end of the third connecting rod and the moving assembly includes dispensing, soldering, or laser welding.

[0010] In some embodiments, at least one of the first connecting rod, the second connecting rod, or the third connecting rod is a flexible connecting rod.

[0011] In some embodiments, the shape of the flexible connecting rod includes a slender cantilever shape or a curved spring shape.

[0012] In some embodiments, when the actuating assembly drives the transmission assembly, the first connecting rod of the transmission assembly will move with the first fixed portion as the axis, while driving the second connecting rod and the third connecting rod of the transmission assembly to move together, thereby driving the connected moving parts to produce displacement.

[0013] In some embodiments, the transmission assembly is integrally formed, and the material includes copper alloy, aluminum alloy, stainless steel, gold or silver.

[0014] In some embodiments, the first displacement is at least 1.1 times the second displacement.

[0015] In some embodiments, the first displacement is at least 1.5 times the second displacement.

[0016] In some embodiments, a convex or concave limiting feature is provided on the first fixing portion, and at least one of the first connecting rod, the second connecting rod or the third connecting rod is provided with a concave or convex limiting feature, and the two limiting features cooperate to form a limiting structure for limiting the movement degree of the transmission assembly.

[0017] In some embodiments, the moving component is supported on the base plate through a supporting component; the moving component includes a first magnetic component, or has magnetic conductivity, or includes a first steel plate; the base plate includes a second magnetic component, or has magnetic conductivity, or includes a second steel plate; the moving component and the base plate have an attractive force generated by a magnetic field to ensure that the moving component is in contact with the supporting component.

[0018] In some embodiments, the supporting component includes a ball or a column with a smooth surface; the material includes metal, ceramic or resin; the first magnetic component and the second magnetic component are magnets.

[0019] In some embodiments, a protective shell is provided on the fixed component and the movable component, and the protective shell has a limiting feature. The limiting feature of the fixed component protective shell and the limiting feature of the movable component protective shell together form a limiting function for limiting the maximum movable range of the movable component.

[0020] In some embodiments, there are at least two shape memory alloy wires; there are at least two transmission components; and each shape memory alloy wire corresponds to at least one transmission component.

[0021] In some embodiments, the elastic connection component is arranged below the movable component and the fixed component, one end of which is connected to the movable component and the other end of which is connected to the fixed component, and the connection method includes soldering or laser welding, conductive adhesive bonding, and is used to transmit electrical signals; the elastic connection component is made of copper alloy, aluminum alloy, stainless steel, gold or silver.

[0022] In some embodiments, the support member includes a column or a ball with a smooth support surface; the material includes metal, ceramic or resin.

[0023] In some embodiments, there is a height difference between the two ends of the shape memory alloy wire to ensure that the transmission assembly is in contact with the support member.

[0024] In some embodiments, an image sensor chip is disposed on the moving component.

[0025] The present invention also provides a camera module, comprising the above-mentioned optical image stabilization device.

[0026] The present invention also provides a method for improving the optical anti-shake stroke, comprising: by setting a transmission component, when the optical anti-shake device is in a working state, driving the transmission component to drive the moving component to move through the actuating component, so that the second displacement generated by the moving component is greater than the first displacement generated by the actuating component, thereby increasing the optical anti-shake stroke and improving the optical anti-shake performance; wherein the optical anti-shake device comprises a fixed component, a moving component, the actuating component and the transmission component; the fixed component and the moving component are connected by an elastic connecting component.

[0027] In some embodiments, the actuating assembly is placed on the fixed assembly; the transmission assembly is placed on the fixed assembly; the first end of the transmission assembly is connected to the actuating assembly, and the second end of the transmission assembly is connected to the moving assembly; the moving assembly is supported on the base plate through a supporting component; the actuating assembly at least includes: a shape memory alloy wire, a first clamp and a second clamp; the two ends of the shape memory alloy wire are fixed by the first clamp and the second clamp respectively; the first end of the shape memory alloy wire is connected to the transmission assembly through the first clamp; the second end of the shape memory alloy wire is connected to the fixed assembly through the second clamp.

[0028] In some embodiments, the transmission assembly includes at least: a first fixed portion, a first connecting rod, a second connecting rod and a third connecting rod fixed on the fixed assembly; the first end of the first connecting rod is connected to the first fixed portion; the second end of the first connecting rod is connected to the first end of the second connecting rod; the second end of the second connecting rod is connected to the actuating assembly; the first end of the third connecting rod is connected to the second end of the second connecting rod; the second end of the third connecting rod is connected to the moving assembly; at least one of the first connecting rod, the second connecting rod or the third connecting rod is a flexible connecting rod.

[0029] In some embodiments, when the actuating assembly drives the transmission assembly, the first connecting rod of the transmission assembly will move with the first fixed portion as the axis, while driving the second connecting rod and the third connecting rod of the transmission assembly to move together, thereby driving the connected moving parts to produce displacement.

[0030] In some embodiments, a rolling element is disposed between the fixing assembly and the transmission assembly to enable the transmission assembly to operate smoothly.

[0031] Compared with the prior art, the embodiment of the present invention can achieve the effect of enlarging the optical image stabilization stroke by adding a transmission component, thereby improving the optical image stabilization performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 and Figure 2 FIG. 4 is a schematic structural diagram of an optical image stabilization device according to Embodiment 1 of the present invention.

[0033] Figure 3 and Figure 4 FIG. 4 is a schematic structural diagram of an optical image stabilization device according to a second embodiment of the present invention.

[0034] Figure 5 This is a schematic diagram of the structure of a transmission assembly according to the second embodiment of the present invention.

[0035] Figure 6 This is a schematic structural diagram of a transmission assembly and an actuating assembly according to the second embodiment of the present invention.

[0036] Figure 7 FIG. 4 is a cross-sectional schematic diagram of the structure of an optical image stabilization device according to a second embodiment of the present invention.

[0037] Figure 8 FIG. 1 is a partial cross-sectional schematic diagram of the structure of an optical image stabilization device according to a second embodiment of the present invention.

[0038] Fig. 9 FIG. 4 is a schematic structural diagram of an optical image stabilization device according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0039] Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited to the specific implementation disclosed below.

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the scheme of the present invention is described in detail below with reference to the accompanying drawings.

[0041] Figure 1 and Figure 2 is a schematic diagram of an optical image stabilization device according to an embodiment of the present invention; Figure 1 as well as Figure 2 The optical image stabilization device includes: a shape memory alloy driving component 110, a fixing component 111, a moving component 112 and an elastic connecting component 114.

[0042] The shape memory alloy driving member 110 is disposed between the fixed component 111 and the movable component 112 to drive the movable component 112 to move in the X and Y directions or rotate around the Z axis relative to the fixed component 111 .

[0043] The shape memory alloy driving member 110 is connected to the fixed component 111 and / or the movable component 112 via a metal gasket 113 , and the metal gasket 113 and the fixed component 111 and / or the movable component 112 are in releasable electrical connection.

[0044] The metal gasket 113 is electrically connected to the fixed component 111 and / or the movable component 112 in a releasable manner, such as by welding, adhering or crimping. The shape memory alloy driving member 110 includes a single shape memory alloy wire 1101 and a holding portion 1102 for holding two ends of the shape memory alloy wire 1101 .

[0045] The holding portion 1102 and the metal gasket 113 are connected by laser welding to ensure a stable electrical connection between the metal gasket 113 and the holding portion 1102 .

[0046] for Figure 1 and Figure 2 In the optical image stabilization device shown, the optical image stabilization stroke (ie, the distance moved by the moving component 112 ) is equal to the extension and contraction distance of the shape memory alloy driving component 110 when powered on, so that the optical image stabilization stroke is limited.

[0047] In order to further increase the optical image stabilization range, different from Figure 1 and Figure 2 In the embodiment shown, the present invention provides another embodiment. By adding a transmission component, the optical anti-shake stroke is enlarged, and the optical anti-shake performance is further improved.

[0048] Figure 3 and Figure 4 is a schematic diagram of another optical image stabilization device according to an embodiment of the present invention; Figure 3 as well as Figure 4 The optical image stabilization device includes: an actuating component 210, a fixing component 211, a moving component 212, a transmission component 213 and an elastic connection component 214.

[0049] The actuating assembly 210 is placed on the fixing assembly 211. The transmission assembly 213 is placed on the fixing assembly 211. The first end of the transmission assembly 213 is connected to the actuating assembly 210. The second end of the transmission assembly 213 is connected to the moving assembly 212. The fixing assembly 211 and the moving assembly 212 are connected via an elastic connection assembly 214.

[0050] The elastic connection component 214 is arranged below the mobile component 212 and the fixed component 211, with one end connected to the mobile component 212 and the other end connected to the fixed component 211, and the connection method includes soldering or laser welding, and is used to transmit electrical signals. The elastic connection component 213 is made of copper alloy, aluminum alloy, stainless steel, gold or silver. An image sensor chip can be set on the mobile component 212.

[0051] The actuating assembly 210 drives the moving assembly 212 to move in the X and Y directions by driving the transmission assembly 213, and can achieve that the first displacement generated by the actuating assembly 210 is smaller than the second displacement generated by the moving assembly 212, thereby increasing the optical image stabilization stroke and improving the optical image stabilization performance.

[0052] In one embodiment, the first displacement is at least 1.1 times the second displacement.

[0053] In one embodiment, the first displacement is at least 1.5 times the second displacement.

[0054] Specifically, the actuating assembly 210 includes a shape memory alloy wire 2101 , a first clamping member 2102 and a second clamping member 2103 .

[0055] The first end of the shape memory alloy wire 2101 is a movable end, connected to the transmission component 213. The second end of the shape memory alloy wire 2101 is a fixed end, connected to the fixed component 211.

[0056] The shape memory alloy wire 2101 is deformed when energized, thereby generating a first displacement.

[0057] Two ends of the shape memory alloy wire 2101 are fixed by a first clamping member 2102 and a second clamping member 2103 respectively.

[0058] The first end of the shape memory alloy wire 2101 is connected to the transmission assembly 213 through the first clamping member 2102. The connection method between the first clamping member 2102 and the transmission assembly 2103 includes soldering, laser welding, conductive adhesive bonding or integral molding.

[0059] The second end of the shape memory alloy wire 2101 is connected to the fixing assembly 211 through the second clamping member 2103. The second clamping member 2103 and the fixing assembly 211 are connected by soldering or laser welding. The first clamping member 2102 and the second clamping member 2103 can be made of conductive metal, such as copper alloy, aluminum alloy, stainless steel, gold or silver.

[0060] In some implementations, there are at least two shape memory alloy wires 2101 ; there are at least two transmission components 213 ; and each shape memory alloy wire 2101 corresponds to at least one transmission component 213 .

[0061] refer to Figure 5 The transmission assembly 213 at least includes: a first fixing portion 2130 fixed on the fixing assembly 211 , a first connecting rod 2131 , a second connecting rod 2132 and a third connecting rod 2133 .

[0062] The first end of the first connecting rod 2131 ( Figure 5 The second end of the first connecting rod 2131 ( Figure 5 A in the middle) and the first end of the second connecting rod 2132 ( Figure 5 A point in the middle) is connected; the second end of the second connecting rod 2132 ( Figure 5 The first end of the third connecting rod 2133 ( Figure 5 point C in the middle) and the second end of the second connecting rod ( Figure 5 The second end of the third connecting rod 2133 ( Figure 5 Point D in the figure) is connected to the moving component 212.

[0063] The connection method between the first fixing portion 2130 and the fixing assembly 211 includes soldering, laser welding, or conductive adhesive bonding. Figure 5 The connection method between the moving component 212 and the moving component 212 includes dispensing, soldering or laser welding. The transmission component 213 can be integrally formed, and the material includes copper alloy, aluminum alloy, stainless steel, gold or silver, etc.

[0064] At least one of the first connecting rod 2131 , the second connecting rod 2132 , or the third connecting rod 2133 is a flexible connecting rod. Figure 5 For example only, the shape of the flexible connecting rod may include other shapes such as a slender cantilever or a curved spring.

[0065] Specifically, when the actuating assembly 210 drives the transmission assembly 213, the first connecting rod 2131 (for example, a flexible rod) of the transmission assembly 213 will move with the first fixed portion 2130 as the axis, while driving the second connecting rod 2132 of the transmission assembly 213 and the third connecting rod 2133 of the transmission assembly 213 to move together, thereby driving the connected moving component 213 to produce displacement.

[0066] In one embodiment, a convex or concave limiting feature 2134 is provided on the first fixing portion 2130, and at least one of the first connecting rod 2131, the second connecting rod 2132 or the third connecting rod 2133 is provided with a concave or convex limiting feature, and the two limiting features cooperate to form a limiting structure for limiting the movement of the transmission assembly 213. Figure 5 As shown, the limiting feature 2134 is an outward convex structure, and the second connecting rod 2132 is provided with an outward convex limiting feature 2135, so as to cooperate with each other to limit the movement of the transmission assembly 213 and improve its reliability. In other embodiments, a corresponding limiting structure can be designed according to the specific structure of the transmission assembly 213, which is not limited here.

[0067] Considering that the transmission assembly 213 may generate vibration when moving, affecting the optical image stabilization performance. Figure 5 , Figure 8 , Fig. 9 As shown, in order to enable the transmission assembly 213 to run smoothly during movement, the embodiment of the present invention further provides a support member 2136 between the housing 610 and the transmission assembly 213. The support member 2136 may be a ball, a cylinder with a smooth surface, etc., and the material includes metal, ceramic or resin.

[0068] Specifically, Figure 8 As shown, the support member 2136 can be fixed on the transmission assembly 213 and then contact the housing 610. Alternatively, the support member 2136 can be fixed on the housing 610 and then contact the transmission assembly 213. In addition, there is a height difference between the two ends of the shape memory alloy wire 2101, which ensures that the transmission assembly 213 is in contact with the support member 2136. Specifically, the height of one end of the second clamping member 2103 clamping the memory alloy wire 2101 is higher than the height of the other end of the first clamping member 2102 clamping the memory alloy wire 2101. The second clamping member 2103 clamping one end of the memory alloy wire 2101 can provide an oblique upward pulling force to ensure that the transmission assembly 213 is in contact with the support member 2136.

[0069] like Figure 6 As shown, in the embodiment of the present invention, the actuating assembly 210 and the transmission assembly 213 can be integrally formed. For example, the actuating assembly 210 and the transmission assembly 213 can be arranged on a support frame; after the actuating assembly 210 and the transmission assembly 213 are assembled with the fixed component 211 and the moving component 212, the redundant part of the support frame is cut off.

[0070] like Figure 7 As shown, the moving component 212 is supported on the bottom plate 310 by the supporting component 510. The image sensor chip 410 is placed on the moving component 212. The moving component 212 can be a first magnetic component, or have magnetic conductivity, or include a first steel plate; the bottom plate 310 can be a second magnetic component, or have magnetic conductivity, or include a second steel plate; the moving component 212 and the bottom plate 310 generate an attractive force through a magnetic field to ensure that the moving component 212 is in contact with the supporting component 510. The supporting component 510 can include a ball, a column with a smooth surface; the material includes stainless steel or ceramics; the first magnetic component and the second magnetic component can be magnets.

[0071] A protective shell 9 (not shown in the figure) can be set on the fixed component 211 and the movable component 212. The protective shell has a limiting feature. The limiting feature of the protective shell of the fixed component 211 and the limiting feature of the protective shell of the movable component 212 together form a limiting function for limiting the maximum movable range of the movable component 212.

[0072] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An optical image stabilization device applied to an image sensor, characterized in that: At least: A fixed component, a moving component, an actuating component, an elastic connecting component and a transmission component; the actuating component is placed on the fixed component; The transmission assembly is placed on the fixed assembly; the first end of the transmission assembly is connected to the actuating assembly, and the second end of the transmission assembly is connected to the moving assembly; the fixed assembly and the moving assembly are connected via an elastic connecting assembly; The actuating assembly drives the moving assembly to move by driving the transmission assembly, and can achieve that the first displacement generated by the actuating assembly is smaller than the second displacement generated by the moving assembly, thereby increasing the optical image stabilization stroke and improving the optical image stabilization performance.

2. The optical image stabilization device according to claim 1, wherein: It also includes a shell, and a support is arranged between the shell and the transmission assembly to ensure the smooth operation of the transmission assembly.

3. The optical image stabilization device according to claim 2, wherein: The actuating assembly at least comprises: a shape memory alloy wire; The shape memory alloy wire is energized to deform, thereby generating the first displacement; The first end of the shape memory alloy wire is a movable end, connected to the transmission assembly; The second end of the shape memory alloy wire is a fixed end connected to the fixed component.

4. The optical image stabilization device according to claim 3, wherein: The actuating assembly further comprises: a first clamping member and a second clamping member; Two ends of the shape memory alloy wire are fixed by the first clamping member and the second clamping member respectively; The first end of the shape memory alloy wire is connected to the transmission assembly through a first clamping member; The connection method between the first clamping member and the transmission assembly includes soldering, laser welding, conductive adhesive bonding or integral molding; The second end of the shape memory alloy wire is connected to the fixing assembly through a second clamping member; The connection method between the second clamping member and the fixing assembly includes soldering, laser welding, or conductive adhesive bonding; The first clamping member and the second clamping member are made of copper alloy, aluminum alloy, stainless steel, gold or silver.

5. The optical image stabilization device according to claim 4, wherein: The transmission assembly at least comprises: a first fixing portion fixed to the fixing assembly, a first connecting rod, a second connecting rod and a third connecting rod; The connection method between the first fixing part and the fixing assembly includes soldering, laser welding, or conductive adhesive bonding; The first end of the first connecting rod is connected to the first fixing portion; The second end of the first connecting rod is connected to the first end of the second connecting rod; The second end of the second connecting rod is connected to the actuating assembly; The first end of the third connecting rod is connected to the second end of the second connecting rod; The second end of the third connecting rod is connected to the moving assembly; The second end of the third connecting rod is connected to the moving component by dispensing, soldering or laser welding.

6. The optical image stabilization device according to claim 5, wherein: At least one of the first connecting rod, the second connecting rod or the third connecting rod is a flexible connecting rod.

7. The optical image stabilization device according to claim 6, wherein: The shape of the flexible connecting rod includes a slender cantilever shape or a curved spring shape.

8. The optical image stabilization device according to claim 7, wherein: When the actuating assembly drives the transmission assembly, the first connecting rod of the transmission assembly will move with the first fixed portion as the axis, and at the same time drive the second connecting rod and the third connecting rod of the transmission assembly to move together, thereby driving the connected moving parts to produce displacement.

9. The optical image stabilization device according to claim 1, wherein: The transmission component is integrally formed, and the material includes copper alloy, aluminum alloy, stainless steel, gold or silver.

10. The optical image stabilization device according to claim 1, wherein: The first displacement is at least 1.1 times the second displacement.

11. The optical image stabilization device according to claim 1, wherein: The first displacement is at least 1.5 times the second displacement.

12. The optical image stabilization device according to claim 5, wherein: A convex or concave limiting feature is provided on the first fixing portion, and at least one of the first connecting rod, the second connecting rod or the third connecting rod is provided with a concave or convex limiting feature, and the two limiting features cooperate to form a limiting structure for limiting the movement degree of the transmission assembly.

13. The optical image stabilization device according to claim 1, wherein: The moving assembly is supported on the bottom plate by a supporting member; The moving assembly includes a first magnetic component, or has magnetic conductivity, or includes a first steel plate; The bottom plate includes a second magnetic component, or has magnetic conductivity, or includes a second steel plate; The moving component and the bottom plate generate an attractive force through a magnetic field, thereby ensuring that the moving component is in contact with the supporting component.

14. The optical image stabilization device according to claim 13, wherein the supporting component comprises a ball or a column with a smooth surface; the material comprises metal, ceramic or resin; and the first magnetic component and the second magnetic component are magnets.

15. The optical image stabilization device according to claim 1, wherein: The fixed component and the movable component are provided with a protective shell, and the protective shell has a limiting feature. The limiting feature of the fixed component protective shell and the limiting feature of the movable component protective shell together form a limiting function for limiting the maximum movable range of the movable component.

16. The optical image stabilization device according to claim 3, wherein: There are at least two shape memory alloy wires; There are at least two transmission components; Each of the shape memory alloy wires corresponds to at least one of the transmission components.

17. The optical image stabilization device according to claim 1, wherein: The elastic connection component is arranged below the movable component and the fixed component, one end of which is connected to the movable component and the other end of which is connected to the fixed component. The connection method includes soldering or laser welding, conductive adhesive bonding, and is used to transmit electrical signals; the elastic connection component is made of copper alloy, aluminum alloy, stainless steel, gold or silver.

18. The optical image stabilization device according to claim 2, wherein: The support member includes a column with a smooth support surface or a ball; the material includes metal, ceramic or resin.

19. The optical image stabilization device according to claim 4, wherein: There is a height difference between the two ends of the shape memory alloy wire, which ensures that the support component is in contact with the transmission component and the fixing component.

20. The optical image stabilization device according to claim 1, wherein: An image sensor chip is arranged on the moving component.

21. A camera module, characterized in that: The optical image stabilization device comprises any one of claims 1 to 20.

22. A method for improving optical image stabilization travel, characterized in that: include: By setting a transmission component, when the optical image stabilization device is in a working state, the transmission component is driven by the actuating component to drive the moving component to move, so that the second displacement generated by the moving component is greater than the first displacement generated by the actuating component, thereby increasing the optical image stabilization stroke and improving the optical image stabilization performance; Wherein, the optical image stabilization device comprises a fixed component, a movable component, the actuating component and the transmission component; the fixed component and the movable component are connected via an elastic connecting component.

23. The method of claim 22, wherein: The actuating assembly is placed on the fixed assembly; the transmission assembly is placed on the fixed assembly; the first end of the transmission assembly is connected to the actuating assembly, and the second end of the transmission assembly is connected to the moving assembly; The moving assembly is supported on the bottom plate by a supporting member; The actuating assembly at least comprises: a shape memory alloy wire, a first clamping member and a second clamping member; Two ends of the shape memory alloy wire are fixed by the first clamping member and the second clamping member respectively; The first end of the shape memory alloy wire is connected to the transmission assembly through a first clamping member; The second end of the shape memory alloy wire is connected to the fixing assembly through a second clamping member.

24. The method of claim 23, wherein: The transmission assembly at least comprises: a first fixing portion fixed to the fixing assembly, a first connecting rod, a second connecting rod and a third connecting rod; The first end of the first connecting rod is connected to the first fixing portion; The second end of the first connecting rod is connected to the first end of the second connecting rod; The second end of the second connecting rod is connected to the actuating assembly; The first end of the third connecting rod is connected to the second end of the second connecting rod; The second end of the third connecting rod is connected to the moving assembly; At least one of the first connecting rod, the second connecting rod or the third connecting rod is a flexible connecting rod.

25. The method of claim 24, wherein: When the actuating assembly drives the transmission assembly, the first connecting rod of the transmission assembly will move with the first fixed portion as the axis, and at the same time drive the second connecting rod and the third connecting rod of the transmission assembly to move together, thereby driving the connected moving parts to produce displacement.

26. The method of claim 25, wherein: A rolling element is arranged between the fixing assembly and the transmission assembly to ensure smooth operation of the transmission assembly.

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