Optical image stabilization apparatus

Abstract

An optical image stabilization apparatus, comprising: a fixed assembly (211), a moving assembly (212), actuating assemblies (210), transmission assemblies (213), and support members (2136). The actuating assemblies (210) are arranged on the fixed assembly (211); the transmission assemblies (213) are arranged on the fixed assembly (211); each transmission assembly (213) has a first end connected to the moving assembly (212) and a second end connected to a corresponding actuating assembly (210); the actuating assemblies (210) drive the moving assembly (212) to move by driving the transmission assemblies (213), and first displacement generated by the actuating assemblies (210) can be less than second displacement generated by the moving assembly (212), thereby increasing the optical image stabilization stroke, and improving the optical image stabilization performance; and the support members (2136) each are arranged on at least one side of the corresponding transmission assembly (213), so as to improve the stability and reliability of the transmission assemblies (213) during movement.

Description

Optical image stabilization device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 15, 2023, with application number 2023110292838 and invention name “An Optical Image Stabilization Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of optical imaging, and in particular to an optical anti-shake device applied to an image sensor. Background Art

[0003] When taking photos with a handheld portable smart device, the human body's physiological tremors are 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 blurry and unclear images.

[0004] In the prior art, optical image stabilization devices include a moving component, a fixed component, and a transmission component between the two. The transmission component is often assembled from multiple separately prepared parts, and the assembly accuracy and efficiency cannot meet production requirements. At the same time, the shape and material of the transmission component make it insufficiently rigid in the direction perpendicular to the fixed component (i.e., the Z direction), resulting in warping or shaking in this direction, which in turn leads to a poor image stabilization effect.

[0005] Summary of the Invention

[0006] The present invention aims to provide an optical image stabilization device that can amplify the optical image stabilization stroke, improve the optical image stabilization performance and simplify the assembly process.

[0007] The present invention provides an optical image stabilization device for an image sensor, comprising at least: a fixed component, a movable component, an actuating component, a transmission component, and a supporting member; the actuating component is placed on the fixed component; the transmission component is placed on the fixed component; a first end of the transmission component is connected to the movable component, and a second end of the transmission component is connected to the actuating component; the actuating component drives the movable 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 movable component, thereby increasing the optical image stabilization stroke and improving the optical image stabilization performance; the supporting member is placed on at least one side of the transmission component, and when a shape memory alloy wire is energized and tightened, the transmission component is in close contact with a housing or the fixed component through the supporting member, thereby improving the stability and reliability of the transmission component during movement.

[0008] Furthermore, at least a portion of the transmission assembly is wrapped with a plastic component, and the transmission assembly and the plastic component are integrally formed. By injection molding the transmission assembly as a whole, the number of parts can be reduced, and the step of stacking and fixing multiple parts together can be omitted, thereby reducing the difficulty of assembly and improving its reliability.

[0009] Furthermore, the optical image stabilization device further includes a transmission cantilever, a first end of which is connected to the first end of the transmission assembly, and a second end of which is connected to the moving assembly. The transmission cantilever and the transmission assembly are designed as separate components, i.e., assembled as separate parts. Therefore, the material and shape of the transmission cantilever are not limited by the transmission assembly, and can be selected according to actual needs.

[0010] Furthermore, 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.

[0011] Furthermore, the actuating assembly also includes at least two clamping members: such as a first clamping member and a second clamping member; the 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 the first clamping member; the connection method of 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 through the second clamping member, and the connection method of the second clamping member and the fixed assembly includes soldering, laser welding, conductive adhesive bonding or integral molding.

[0012] Furthermore, due to the shape or material of the transmission assembly, its rigidity in the direction perpendicular to the plane of the fixed assembly (i.e., the Z direction) is insufficient. Therefore, when the shape memory alloy wire is energized, it pulls on the transmission assembly, causing it to warp in the vertical direction. Therefore, providing a support member on at least one side of the transmission assembly can prevent warping.

[0013] Furthermore, when the shape memory alloy wire is not energized, the transmission assembly can reduce or avoid shaking in the Z direction through the support member on at least one side thereof, thereby improving the stability and reliability of the transmission assembly.

[0014] Furthermore, in some embodiments, there is a height difference between the first clamping member and the second clamping member, and the shape memory alloy wire will generate an upward oblique pulling force to tighten the transmission component when energized. The transmission component can ensure that the transmission component is in close contact with the housing or the fixed component through the support member on at least one side thereof, thereby improving the overall stability.

[0015] Furthermore, the transmission assembly is integrally formed, and the material includes gold, silver, copper, iron, aluminum, gold alloy, silver alloy, copper alloy, iron alloy or aluminum alloy; the first clamping member and the second clamping member are made of gold, silver, copper, iron, aluminum, gold alloy, silver alloy, copper alloy, iron alloy or aluminum alloy.

[0016] Furthermore, the connection method between the transmission cantilever and the moving component and / or the transmission component includes soldering, gluing or riveting, and the plastic part wrapped around the transmission component has a slot to place the transmission cantilever and support the end face of the transmission cantilever.

[0017] Furthermore, the area where the plastic part outside the transmission component contacts the support component has a recess to accommodate the support component, and the support component has a portion protruding from the surface of the transmission component after being placed in the recess.

[0018] Furthermore, when the actuating assembly drives the transmission assembly to move the moving assembly, the transmission assembly drives the support member to closely contact the housing, the base plate or the fixed assembly to improve the stability and reliability of the transmission assembly, that is, to prevent it from warping.

[0019] Furthermore, the support member contacts the transmission assembly and / or the housing.

[0020] Furthermore, the support member is a sphere with a smooth surface, a column with a smooth contact surface, or a boss with a smooth contact surface that is integrally injection-molded with the transmission assembly.

[0021] Furthermore, the transmission assembly at least includes: a first fixing portion fixed to the fixing assembly, a first connecting rod, and a second connecting rod; the first fixing portion and the fixing assembly are connected by soldering, laser welding, or conductive adhesive bonding;

[0022] 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 transmission cantilever is connected to the second end of the second connecting rod; and the second end of the transmission cantilever is connected to the moving assembly;

[0023] Furthermore, at least one of the first connecting rod, the second connecting rod or the transmission cantilever is a flexible connecting rod.

[0024] Furthermore, the shape of the flexible connecting rod includes a slender cantilever shape or a curved spring shape.

[0025] Furthermore, when the actuating assembly drives the transmission assembly, the second connecting rod of the transmission assembly will move together with the first connecting rod with the first fixed part as the axis, and at the same time drive the transmission cantilever to move together, thereby driving the moving assembly connected to the transmission cantilever to produce displacement.

[0026] Furthermore, when power is turned on, when the shape memory alloy generates the first displacement, it drives the second connecting rod connected to the shape memory alloy to generate a transmission displacement around the connection part of the first connecting rod and the second connecting rod, and the second connecting rod drives the transmission cantilever connected to it to generate a second displacement. At the same time, the first connecting rod generates a displacement around the connection part of the first connecting rod and the first fixed part, wherein the first displacement is smaller than the second displacement, thereby achieving an amplified anti-shake stroke.

[0027] Furthermore, the second displacement is at least 1.1 times the first displacement. Preferably, the second displacement can reach at least 1.5 times the first displacement.

[0028] Furthermore, a convex or concave limiting feature is provided on the first fixing portion or the plastic part covering it, and at least one of the first connecting rod, the second connecting rod or the plastic part covering them is provided with a concave or convex limiting feature. The two limiting features cooperate to form a limiting structure for limiting the movement range of the transmission assembly.

[0029] Furthermore, the fixed component is provided with a plurality of the transmission components, wherein the transmission cantilevers of any two adjacent transmission components do not contact each other.

[0030] Furthermore, the movable component is supported on the base plate through a supporting component; the movable 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 movable component and the base plate have an attractive force generated by a magnetic field, ensuring that the movable component is in contact with the supporting component.

[0031] Furthermore, the movable component includes a first magnetic component, or has magnetic conductivity, or includes a first steel plate; the shell includes a second magnetic component, or has magnetic conductivity, or includes a second steel plate; the magnetic interaction force between the first magnetic component and the second magnetic component ensures that the movable component is stably adsorbed on the shell.

[0032] Furthermore, the supporting component includes a ball, a column with a smooth surface, or a boss with a smooth surface and injection-molded integrally with the moving component; the material includes metal, ceramic, or resin; and the first magnetic component and / or the second magnetic component is a magnet.

[0033] Furthermore, the fixed component and the movable component jointly form a limiting function through plastic components provided on the outside of both components, so as to limit the maximum movable range of the movable component.

[0034] Furthermore, there are at least two shape memory alloy wires; there are at least two transmission assemblies; and each shape memory alloy wire corresponds to at least one transmission assembly.

[0035] Furthermore, the device further comprises an elastic connection component;

[0036] The elastic connection component is arranged below the movable component and the fixed component and includes at least one metal elastic wire. A first end of the metal elastic wire is connected to the movable component of the optical image stabilization device, and an opposite second end is connected to the fixed component of the optical image stabilization device. The metal elastic wire can be used to conduct electrical signals, and each of the metal elastic wires includes at least two metal layers, with an insulating layer between the metal layers.

[0037] The material of the metal layer of the elastic connection component includes gold, silver, copper, iron, aluminum, gold alloy, silver alloy, copper alloy, iron alloy or aluminum alloy.

[0038] Furthermore, an image sensor chip is provided on the moving component.

[0039] The present invention also provides a camera module comprising the above-mentioned optical image stabilization device.

[0040] Furthermore, the present invention also provides a method for improving the optical image stabilization stroke, which is characterized by including: by setting a transmission component, when the optical image stabilization device is in a working state, driving the transmission component to move the moving component 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 image stabilization stroke and improving the optical image stabilization performance; wherein the optical image stabilization device includes at least a fixed component, a moving component, a support, the actuating component and the transmission component; and providing a support on at least one side of the transmission component to maintain the stability and reliability of the transmission component.

[0041] Furthermore, the moving assembly can be connected to the actuating assembly via a transmission cantilever, and the transmission cantilever can be assembled as a separate component. The transmission cantilever can be made of a suitable material and shape to improve its performance. The material can be any one or more of gold, silver, copper, iron, aluminum, a gold alloy, a silver alloy, a copper alloy, an iron alloy, or an aluminum alloy, and the shape can be, for example, a long rod or a sheet.

[0042] Furthermore, the transmission cantilever is connected to the moving component and / or the transmission component by soldering, gluing or riveting.

[0043] Furthermore, the transmission component is integrally formed, and the material includes gold, silver, copper, iron, aluminum, gold alloy, silver alloy, copper alloy, iron alloy or aluminum alloy.

[0044] Furthermore, the outer side of at least part of the transmission component is wrapped with a plastic part, and the transmission component and the plastic part are integrally formed; further, part of the transmission component except the first connecting rod is wrapped with a plastic part, and the part is injection-molded integrally with the plastic part, which can reduce the number of subsequent assembly parts.

[0045] Furthermore, a recess is provided in the contact area between the transmission assembly and the support member to accommodate the support member.

[0046] Furthermore, the support member has a portion protruding from the surface of the transmission component after being placed in the recess, and when the actuating component drives the transmission component to move the moving component, the transmission component drives the support member to move to the contact shell to prevent the transmission component from warping.

[0047] Furthermore, the support member is brought into contact with the transmission assembly and / or the housing according to the working state of the transmission assembly. Furthermore, the support member is a sphere with a smooth surface or a cylinder with a smooth surface to reduce friction resistance when the transmission assembly is displaced.

[0048] Furthermore, the actuating assembly can be arranged on the fixed assembly; the transmission assembly can be placed on the fixed assembly; the first end of the transmission assembly can be connected to the actuating assembly, and the second end of the transmission assembly can be connected to the movable assembly; the movable assembly can be supported on the base plate through a supporting component; the actuating assembly at least includes: a shape memory alloy wire, a first clamping member and a second clamping member; the 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 the first clamping member; the second end of the shape memory alloy wire is connected to the fixed assembly through the second clamping member.

[0049] Furthermore, the transmission assembly includes at least: a first fixed part, a first connecting rod, and a second connecting rod fixed on the fixed assembly; 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 transmission cantilever is connected to the second end of the second connecting rod; the second end of the transmission cantilever is connected to the moving assembly; at least one of the first connecting rod, the second connecting rod or the transmission cantilever is a flexible connecting rod.

[0050] Furthermore, when the actuating assembly drives the transmission assembly, the first connecting rod of the transmission assembly will move with the first fixed part as the axis, while driving the second connecting rod of the transmission assembly to move together with the transmission cantilever, thereby driving the moving assembly connected to the transmission cantilever to produce displacement.

[0051] Furthermore, the transmission cantilever and the moving component and / or the second connecting rod may be connected by soldering, dispensing or riveting.

[0052] Compared with the prior art, the present invention provides supports above and below the transmission assembly, which can, on the one hand, prevent the transmission assembly from warping in the Z direction during displacement due to insufficient rigidity in the Z direction, and on the other hand, reduce its upper and lower activity space when no displacement occurs, thereby improving its reliability. In addition, the present invention also achieves the effect of amplifying the optical image stabilization stroke while reducing the number of assembly parts and process steps by designing the transmission assembly and the transmission cantilever separately and fixing at least part of the transmission assembly in the plastic part during integral injection molding. This improves the optical image stabilization performance while making the transmission cantilever no longer restricted by the material and shape of the transmission assembly, thereby improving the reliability of the transmission cantilever, further improving the assembly accuracy and reducing the assembly difficulty, and improving the mass production of the optical image stabilization device. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] 1 and 2 are schematic structural diagrams of an optical image stabilization device in the prior art.

[0054] 3 and 4 are schematic structural diagrams of an optical image stabilization device according to an embodiment of the present invention.

[0055] FIG5 is a schematic structural diagram of a transmission assembly according to an embodiment of the present invention.

[0056] FIG6 is a schematic structural diagram of a transmission assembly and an actuating assembly according to an embodiment of the present invention.

[0057] FIG. 7 is a schematic cross-sectional view of the structure of an optical image stabilization device according to an embodiment of the present invention.

[0058] FIG. 8 is a partial cross-sectional schematic diagram of the structure of an optical image stabilization device according to an embodiment of the present invention.

[0059] FIG. 9 is a schematic structural diagram of an optical image stabilization device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0060] The following description sets forth numerous specific details to facilitate a thorough 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 departing from the scope of the present invention. Therefore, the present invention is not limited to the specific implementations disclosed below.

[0061] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the scheme of the present invention is described in detail below with reference to the accompanying drawings.

[0062] 1 and 2 are schematic diagrams of an optical image stabilization device in the prior art. Referring to FIG. 1 and FIG. 2 , the optical image stabilization device includes a shape memory alloy driver 110 , a fixed component 111 , a moving component 112 , and an elastic connection component 114 .

[0063] 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 to rotate around the Z axis relative to the fixed component 111 .

[0064] The shape memory alloy driver 110 is connected to the fixed component 111 and / or the movable component 112 via a metal gasket 113 . The metal gasket 113 and the fixed component 111 and / or the movable component 112 are in releasable electrical connection.

[0065] 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 pressing.

[0066] The shape memory alloy driving component 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 .

[0067] 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 .

[0068] For the optical image stabilization device shown in FIG. 1 and FIG. 2 , 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 driver 110 when energized, so the optical image stabilization stroke is limited.

[0069] To further increase the optical image stabilization stroke, the present invention provides an embodiment different from the prior art shown in Figures 1 and 2. By adding a transmission component, the optical image stabilization stroke is amplified, thereby further improving the optical image stabilization performance.

[0070] 3 and 4 are schematic diagrams of another optical image stabilization device according to an embodiment of the present invention. Referring to FIG. 3 and FIG. 4 , the optical image stabilization device includes an actuating assembly 210 , a fixing assembly 211 , a moving assembly 212 , a transmission assembly 213 and an elastic connection assembly 214 .

[0071] Actuating assembly 210 is placed on fixed assembly 211. Transmission assembly 213 is placed on fixed assembly 211. A first end of transmission assembly 213 is connected to actuating assembly 210. A second end of transmission assembly 213 is connected to moving assembly 212. Fixed assembly 211 and moving assembly 212 are connected via elastic connection assembly 214.

[0072] The elastic connector 214 is positioned below the movable component 212 and the fixed component 211. One end of the connector is connected to the movable component 212, and the other end is connected to the fixed component 211. Connections are made by soldering or laser welding, and are used to transmit electrical signals. The elastic connector 213 can be made of gold, silver, copper, iron, aluminum, a gold alloy, a silver alloy, a copper alloy, an iron alloy, or an aluminum alloy. An image sensor chip can be mounted on the movable component 212.

[0073] 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.

[0074] In one embodiment, the second displacement is at least 1.1 times the first displacement.

[0075] In one embodiment, the second displacement is at least 1.5 times the first displacement.

[0076] Specifically, the actuating assembly 210 includes a shape memory alloy wire 2101 , a first clamping member 2102 , and a second clamping member 2103 .

[0077] The first end of the shape memory alloy wire 2101 is a movable end connected to the transmission assembly 213. The second end of the shape memory alloy wire 2101 is a fixed end connected to the fixed assembly 211.

[0078] The shape memory alloy wire 2101 is deformed when energized, thereby generating a first displacement.

[0079] Both ends of the shape memory alloy wire 2101 are fixed by a first clamping member 2102 and a second clamping member 2103 respectively.

[0080] The first end of the shape memory alloy wire 2101 is connected to the transmission assembly 213 via the first clamping member 2102. The first clamping member 2102 and the transmission assembly 2103 are connected by soldering, laser welding, conductive adhesive bonding, or integral molding.

[0081] The second end of the shape memory alloy wire 2101 is connected to the fixing assembly 211 via a 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 a conductive metal, such as gold, silver, copper, iron, aluminum, a gold alloy, a silver alloy, a copper alloy, an iron alloy, or an aluminum alloy.

[0082] 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 .

[0083] 5 , the transmission assembly 213 at least includes: a first fixing portion 2130 fixed to the fixing assembly 211 , a first connecting rod 2131 , a second connecting rod 2132 and a transmission cantilever 2133 .

[0084] The first end of the first connecting rod 2131 (point B in FIG5 ) is connected to the first fixed portion 2130 ; the second end of the first connecting rod 2131 (point A in FIG5 ) is connected to the first end of the second connecting rod 2132 (point A in FIG5 ); the second end of the second connecting rod 2132 (point C in FIG5 ) is connected to the actuating assembly 210 ; the first end of the transmission cantilever 2133 (point C in FIG5 ) is connected to the second end of the second connecting rod (point C in FIG5 ); and the second end of the transmission cantilever 2133 (point D in FIG5 ) is connected to the moving assembly 212 , wherein the transmission cantilever 2133 is assembled as a separate component. The transmission cantilever 2133 can be made of a suitable material, such as gold, silver, copper, iron, aluminum, or any alloy thereof, and can be shaped appropriately, such as a long rod or a sheet.

[0085] The connection method between the first fixing portion 2130 and the fixed component 211 includes soldering, laser welding, and conductive adhesive bonding. The connection method between the second end of the transmission cantilever 2133 (point D in Figure 5) and the movable component 212 includes dispensing, soldering, or laser welding. The transmission component 213 can be injection molded in one piece. The material of the transmission component 213 includes gold, silver, copper, iron, aluminum, gold alloy, silver alloy, copper alloy, iron alloy, or aluminum alloy. After the transmission component 213 is injection molded in one piece, its outer side is wrapped with a plastic part (not shown in the figure), wherein the first connecting rod 2131 is not wrapped by the plastic part to ensure its elastic function.

[0086] At least one of the first connecting rod 2131, the second connecting rod 2132 or the transmission cantilever 2133 is a flexible connecting rod. FIG5 is only an example, and the shape of the flexible connecting rod may include other shapes such as a slender cantilever or a curved spring.

[0087] Specifically, when the actuating assembly 210 drives the transmission assembly 213, the first connecting rod 2131 (for example, it can be a flexible rod) of the transmission assembly 213 will move with the first fixed part 2130 as the axis, while driving the second connecting rod 2132 of the transmission assembly 213 and the transmission cantilever 2133 of the transmission assembly 213 to move together, thereby driving the connected moving assembly 213 to produce displacement.

[0088] 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 plastic member surrounding them is provided with a concave or convex limiting feature. These two limiting features cooperate to form a limiting structure for limiting the range of motion of the transmission assembly 213. As shown in Figure 5, the limiting feature 2134 is a convex structure, and the second connecting rod 2132 is provided with a convex limiting feature 2135. These mutually cooperate to limit the motion of the transmission assembly 213 and improve its reliability. In other embodiments, corresponding limiting structures can be designed based on the specific structure of the transmission assembly 213, and this is not limited here.

[0089] Considering that the transmission assembly 213 may generate vibrations during movement, which could affect the optical image stabilization performance, as shown in Figures 5, 8, and 9, to ensure smooth operation of the transmission assembly 213 during movement, this embodiment of the present invention further provides a support member 2136 between the housing 610 and the transmission assembly 213. The support member 2136 can be a sphere with a smooth surface, a cylinder with a smooth contact surface, or a boss integrally molded with the transmission assembly, such as a ball or a smooth cylinder, and can be made of metal, ceramic, or resin.

[0090] Specifically, as shown in Figure 8, the support member 2136 can be fixed to the transmission assembly 213 and then contact the housing 610; alternatively, the support member 2136 can be fixed to the housing 610 and then contact the transmission assembly 213; alternatively, the support member can be placed in a recessed portion of the transmission assembly 213 and have a curved surface that protrudes from the transmission assembly 213; alternatively, the support member can be a smooth boss integrally injection-molded with the transmission assembly 213. Furthermore, a height difference exists between the two ends of the shape memory alloy wire 2101, ensuring that the support member 2136 simultaneously contacts the transmission assembly 213 and the housing 610. Specifically, the second clamping member 2103 grips one end of the shape memory alloy wire 2101 at a higher height than the first clamping member 2102 grips the other end of the shape memory alloy wire 2101. The second clamping member 2103 gripping one end of the shape memory alloy wire 2101 provides an oblique upward pulling force, ensuring that the support member 2136 simultaneously contacts the transmission assembly 213 and the housing 610 on the side of the support member.

[0091] As shown in FIG. 6 , in an embodiment of the present invention, the actuating assembly 210 and the transmission assembly 213 may be integrally formed.

[0092] In some embodiments, the actuating assembly 210 and the transmission assembly 213 may be disposed on a support frame; after the actuating assembly 210 and the transmission assembly 213 are assembled with the fixing assembly 211 and the moving assembly 212, the redundant portion of the support frame is cut off.

[0093] As shown in Figure 7, the movable assembly 212 is supported on the base plate 310 by a support member 510. The image sensor chip 410 is placed on the movable assembly 212. The movable assembly 212 can be a first magnetic component, or a magnetically conductive component, or a first steel plate; the base plate 310 can be a second magnetic component, or a magnetically conductive component, or a second steel plate. The movable assembly 212 and the base plate 310 generate an attractive force through a magnetic field, ensuring contact between the movable assembly 212 and the support member 510. The support member 510 can include a ball bearing or a smooth-surfaced column; the material can include stainless steel or ceramic; the first magnetic component and / or the second magnetic component can be a magnet.

[0094] A protective shell (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, which is used to limit the maximum movable range of the movable component 212.

[0095] Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solutions 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 solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.

[0096] Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solutions 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 solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.

Claims

1. An optical image stabilization device applied to an image sensor, characterized in that: At least: Fixed components, moving components, actuating components, transmission components, and supporting components; The actuating assembly is placed on the fixing assembly; The transmission assembly is placed on the fixed assembly; the first end of the transmission assembly is connected to the moving assembly, and the second end of the transmission assembly is connected to the actuating assembly; The actuating assembly drives the moving assembly to move by driving the transmission assembly, and 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; The support member is disposed on at least one side of the transmission assembly to improve the stability and reliability of the transmission assembly during movement.

2. The optical image stabilization device according to claim 1, wherein: The outer side of at least a part of the transmission component is wrapped with a plastic part, and the transmission component and the plastic part are integrally formed.

3. The optical image stabilization device according to claim 1, wherein: The device also includes a transmission cantilever, a first end of the transmission cantilever is connected to the first end of the transmission component, and a second end of the transmission cantilever is connected to the moving component. 4 . The optical image stabilization device as claimed in claim 3 , wherein the transmission cantilever is assembled as a separate part.

5. The optical image stabilization device according to claim 1, wherein: The actuating assembly further 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.

6. The optical image stabilization device according to claim 5, wherein: The actuating assembly also includes at least two clamping members, and the two ends of the shape memory alloy wire are respectively fixed by a first clamping member and a second clamping member; there is a height difference between the first clamping member and the second clamping member to ensure that the actuating force generated by the shape memory alloy wire can simultaneously contact the support member with the transmission assembly and the housing or the fixing assembly.

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

8. The optical image stabilization device as described in claim 3, wherein the transmission cantilever is connected to the moving component and / or the transmission component by soldering, gluing or riveting, and the plastic part wrapped around the transmission component has a slot to place the transmission cantilever and support the end face of the transmission cantilever.

9. The optical image stabilization device according to claim 2, wherein: The contact area between the plastic part outside the transmission component and the support component has a recess to accommodate the support component. After the support component is placed in the recess, a portion protrudes from the surface of the transmission component.

10. The optical image stabilization device according to claim 9, wherein: When the actuating assembly drives the transmission assembly to move the moving assembly, the transmission assembly drives the supporting member on at least one side to contact the housing or the fixing assembly to prevent the transmission assembly from warping.

11. The optical image stabilization device according to claim 1, wherein: The support member on at least one side contacts the transmission component and the housing or the fixing component.

12. The optical image stabilization device according to claim 1, wherein: The supporting member on at least one side is a sphere with a smooth surface, a column with a smooth contact surface, or a boss integrally formed by injection molding with the transmission component.

13. The optical image stabilization device according to claim 6, wherein: The connection method between the first clamping member and the transmission assembly includes soldering, laser welding, conductive adhesive bonding or integral molding; The first end of the shape memory alloy wire is connected to the transmission assembly through the first clamping member; 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 conductive metal.

14. The optical image stabilization device according to claim 3, wherein: The transmission assembly at least comprises: a first fixing portion fixed to the fixing assembly, a first connecting rod, and a second 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 transmission cantilever is connected to the second end of the second connecting rod; The second end of the transmission cantilever is connected to the moving component.

15. The optical image stabilization device according to claim 14, wherein: At least one of the first connecting rod, the second connecting rod or the transmission cantilever is a flexible connecting rod.

16. The optical image stabilization device according to claim 15, wherein: The shape of the flexible connecting rod includes a slender cantilever shape or a curved spring shape.

17. The optical image stabilization device according to claim 16, wherein: When the actuating assembly drives the transmission assembly, the second The connecting rod will move together with the first connecting rod with the first fixing part as the axis, and at the same time drive the transmission cantilever to move together, thereby driving the moving component connected to the transmission cantilever to generate displacement.

18. The optical image stabilization device according to claim 17, wherein: When power is turned on, when the shape memory alloy produces the first displacement, it drives the second connecting rod connected to the shape memory alloy to produce a transmission displacement around the connecting part of the first connecting rod and the second connecting rod, and the second connecting rod drives the transmission cantilever connected to it to produce a second displacement. At the same time, the first connecting rod produces a displacement around the connecting part of the first connecting rod and the first fixed part, wherein the first displacement is smaller than the second displacement, thereby achieving an enlarged anti-shake stroke.

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

20. The optical image stabilization device according to claim 14, wherein: A convex or concave limiting feature is provided on the first fixing portion or the plastic part covering it, and at least one of the first connecting rod, the second connecting rod or the plastic part covering them is provided with a concave or convex limiting feature, and the two limiting features cooperate to form a limiting structure for limiting the movement range of the transmission component.

21. The optical image stabilization device according to claim 3, wherein: The fixed component is provided with a plurality of transmission components, wherein the transmission cantilevers of any two adjacent transmission components are not in contact with each other.

22. 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.

23. The optical image stabilization device according to claim 1, wherein: The moving assembly includes a first magnetic component, or a material having magnetic conductivity, or a first steel plate; The device further comprises a housing, wherein the housing comprises a second magnetic component, or a material having magnetic conductivity, or comprises a second steel plate; The magnetic attraction interaction force between the first magnetic component and the second magnetic component ensures that the moving component is stably adsorbed to the housing.

24. The optical image stabilization device as described in claim 22, wherein the supporting component includes a ball, a cylinder with a smooth surface, or a boss with a smooth surface and injection-molded integrally with the moving component; the material includes metal, ceramic, or resin; and the first magnetic component and / or the second magnetic component is a magnet.

25. The optical image stabilization device according to claim 1, wherein: The fixed component and the movable component jointly form a limiting function through plastic components arranged outside the fixed component and the movable component are used to limit the maximum movable range of the movable component.

26. The optical image stabilization device according to claim 5, 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.

27. The optical image stabilization device according to claim 1, wherein: The device also includes an elastic connection component; The elastic connection component is arranged below the moving component and the fixed component, and includes at least one metal elastic wire, a first end of the metal elastic wire is connected to the moving component of the optical image stabilization device, and a second end thereof is connected to the fixed component of the optical image stabilization device. The metal elastic wires can be used to conduct electrical signals, and each of the metal elastic wires includes at least two metal layers, with an insulating layer between the metal layers; The material of the metal layer of the elastic connection component includes gold, silver, copper, iron, aluminum, gold alloy, silver alloy, copper alloy, iron alloy or aluminum alloy.

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

29. A camera module, characterized in that: The optical image stabilization device comprises any one of claims 1 to 28.

30. 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 at least comprises a fixed component, a moving component, a supporting component, the actuating component and the transmission component; At least one support member is arranged on at least one side of the transmission assembly to maintain the stability and reliability of the transmission assembly.

31. The method as claimed in claim 30, wherein the moving assembly is connected to the actuating assembly via a transmission cantilever, wherein the transmission cantilever is assembled as a separate part, and the transmission cantilever can be selected from suitable materials and shapes as required.

32. The method according to claim 31, wherein the transmission cantilever is connected to the moving component and / or the transmission component by soldering, dispensing or riveting.

33. The method of claim 30, wherein: The transmission component is integrally formed, and the material includes gold, silver, copper, iron, aluminum, gold alloy, silver alloy, copper alloy, iron alloy or aluminum alloy.

34. The method of claim 30, wherein: The outer side of at least a part of the transmission component is wrapped with a plastic part, and the transmission component and the plastic part are integrally formed by injection molding.

35. The method of claim 30, wherein: An inner recess is provided in the contact area between the transmission assembly and the support member to accommodate the support member.

36. The method of claim 35, wherein: After being placed in the recess, the support member has a portion protruding from the surface of the transmission component, and when the actuating component drives the transmission component to move the moving component, the transmission component drives the support member to move to contact the outer shell or the fixed component to prevent the transmission component from warping.

37. The method of claim 36, wherein: The support member is brought into contact with the transmission assembly and the housing or the fixed assembly according to the working state of the transmission assembly.

38. The method of claim 30, wherein: The support member is a sphere with a smooth surface, a column with a smooth surface, or a boss that is integrally formed with the transmission component by injection molding.

39. The method of claim 30, wherein: The actuating assembly is arranged on the fixing assembly; the transmission assembly is placed on the fixing 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; Fixing two ends of the shape memory alloy wire to the first clamping piece and the second clamping piece respectively; Connecting the first end of the shape memory alloy wire to the transmission assembly via a first clamping member; The second end of the shape memory alloy wire is connected to the fixing assembly through a second clamping member.

40. The method of claim 31, wherein: The transmission assembly at least comprises: A first fixing part, a first connecting rod, and a second connecting rod fixed to the fixing assembly; a first end of the first connecting rod is connected to the first fixing 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 transmission cantilever is connected to the second end of the second connecting rod; The second end of the transmission cantilever is connected to the moving assembly; At least one of the first connecting rod, the second connecting rod or the transmission cantilever is a flexible connecting rod.

41. The method of claim 40, wherein: When the actuating assembly drives the transmission assembly, the first connecting rod of the transmission assembly will move with the first fixed part as the axis, and at the same time drive the second connecting rod of the transmission assembly to move together with the transmission cantilever, thereby driving the moving assembly connected to the transmission cantilever to produce displacement.

42. The method of claim 40, wherein: The transmission components except the first connecting rod are integrally formed by injection molding to be fixed in the plastic part.

43. The method of claim 40, wherein: The transmission cantilever is connected to the moving component and / or the second connecting rod by soldering, dispensing or riveting.

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